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? Industry Overview: AGV Market Size Surpasses the $6 Billion Mark According to the latest Global Internal Logistics Industry Index, the global Automated Guided Vehicle (AGV) market has successfully surpassed the $6 billion mark and is accelerating at a compound annual growth rate (CAGR) of over 10%.   Although laser navigation continues to dominate as the largest technology segment (accounting for over 35% of all deployments), the industry narrative on the factory and warehouse floor has undergone a fundamental structural shift.   Today, the discussion is no longer limited to the procurement of individual hardware units, but rather focuses on the coordinated scheduling of entire ecosystems and the core reliability provided by high-precision sensors.   ? Three Strategic Themes on the 2026 Supply Chain Executive Agenda Within enterprise supply chain and smart manufacturing communities, the industry’s focus has shifted entirely from “exploratory automation” to “practical integration”:   1. Rigorous ROI Scrutiny and Extremely Compressed Payback Periods The era of blindly testing the waters with automation projects is over. Supply chain leaders are under immense pressure to squeeze every last bit of efficiency out of every square meter of factory space. Capital expenditure approvals are now strictly tied to actual operational metrics. Projects are undergoing extremely rigorous evaluations to ensure they break even within a short window of 8 to 18 months.   To meet these aggressive ROI targets, AGV manufacturers (OEMs) and Tier-1 system integrators are gradually moving away from traditional overseas-branded sensors, which are often expensive and feature-heavy. Instead, the industry is widely adopting localized solutions that combine cost-effectiveness with industrial-grade navigation performance, such as SDKELI’s 2D LiDAR series. By offering extremely high measurement accuracy and a highly competitive total cost of ownership (TCO), SDKELI’s lidar helps manufacturing enterprises significantly lower the financial barrier of upfront hardware investment, thereby substantially shortening the project’s payback period without compromising safety or vehicle uptime.   2. Cross-Vendor “Mixed Fleets” Become the Norm As the scale of enterprise logistics expands, managing closed, single-brand automated facilities is evolving into a form of “industrial debt.” Companies are actively adopting “mixed fleets”—integrating older-generation fixed-path AGVs with newer-generation 3D vision-based AMRs (autonomous mobile robots) within the same environment, with these robots often sourced from three to four different suppliers.   Core Operational Challenge: Since robots from different brands cannot communicate natively out of the box, preventing cross-fleet deadlocks (system crashes) in narrow, high-traffic aisles has become a top priority for factory digitalization leaders.   This is precisely where advanced environmental perception capabilities play a critical role. By integrating SDKELI’s high-precision 2D LiDAR, mobile robots gain a broader field of view and demonstrate exceptional resistance to environmental light interference and dust. Whether retrofitting traditional forklifts or deploying cutting-edge AMRs, Keli Radar’s precise ranging capabilities ensure that mixed fleets can navigate and avoid obstacles seamlessly when encountering obstacles and narrow aisles, thereby completely eliminating the risk of minor downtime that plagues multi-brand mixed operations.   3. Software-Based Fleet Control and Algorithmic Scheduling Surpass Hardware Specifications Software has officially become the central “brain” of modern material handling. Industry data shows that cloud-based and hybrid Fleet Management Systems (FMS) are experiencing explosive growth. These systems enable real-time dynamic traffic control and multi-step workflow allocation for heterogeneous (multi-brand) fleets, and are becoming a core metric for evaluating automation vendors’ delivery capabilities.   However, no matter how advanced the scheduling software is, its effectiveness depends entirely on the quality of the data it receives. At the warehouse’s operational level, the stable, high-frequency laser point cloud data from SDKELI’s 2D lidar serves as the most fundamental and critical data stream. It continuously feeds clean, real-time spatial analysis data to the fleet management system (FMS), thereby maximizing the efficiency of vehicle path planning. ? Persistent Real-World Implementation Challenges Although the technology is maturing rapidly, industry analysts have identified two major obstacles to widespread adoption:   Industrial Network Infrastructure: In traditional, aging brownfield facilities characterized by high density and dense steel structures, maintaining seamless connectivity for 5G or private Wi-Fi networks remains a challenge, making the autonomous decision-making capabilities of onboard sensors particularly critical.   Shortage of Multidisciplinary Automation Talent: There is a severe global shortage of multidisciplinary engineers, and the industry is in dire need of professionals who can both diagnose hardware failures in heavy machinery automation systems and understand the software algorithms of complex group control systems.  

In a significant advancement for industrial safety, China's State Administration for Market Regulation and the Standardization Administration have recently released a series of crucial national standards within the machinery safety sector. Among these, two pivotal standards—GB/T 19436.1-2025 *Electrical Safety of Machinery – Electro-sensitive protective equipment – Part 1: General requirements and tests* and GB/T 19436.2-2025 *Electrical Safety of Machinery – Electro-sensitive protective equipment – Part 2: Particular requirements for equipment using active opto-electronic protective devices (AOPDs)*—were primarily drafted by Jining Keli Photoelectronic Industrial Co.,Ltd, a subsidiary of Shandong Kechuang. This accomplishment solidifies Keli Photoelectronic's position as a leading authority in China's photoelectric safety technology domain.   Serving as the convener of the Electro-sensitive Equipment Working Group under the National Technical Committee for Standardization of Industrial Machinery Electrical Systems, Keli Photoelectronic brings a robust track record to this achievement. The company has previously led the development of nine national standards, undertaken over 30 national, provincial, and municipal scientific research projects, and accumulated more than 100 intellectual property rights. This latest contribution in leading the formulation of national standards marks a substantial step forward in elevating safety benchmarks across the industry.   The newly published standards are set to play a critical role. GB/T 19436.1-2025 establishes the foundational framework and testing protocols for all electro-sensitive protective equipment (ESPE). Its counterpart, GB/T 19436.2-2025, provides specialized technical specifications for Active Opto-electronic Protective Devices (AOPDs), such as safety light curtains and grids, which are essential for safeguarding personnel around automated machinery, robots, and presses. These updated standards aim to enhance equipment reliability, ensure greater consistency in safety performance, and provide clearer guidance for manufacturers and integrators, ultimately fostering a safer working environment within smart manufacturing facilities.   Looking ahead, Jining Keli remains committed to its dual-driven strategy of technological innovation and standard leadership. The company will continue to dedicate resources to pioneering research and development in photoelectric sensing and safety control technologies. By setting and advancing industry standards, Keli aims to provide more reliable, intelligent safety solutions, thereby contributing to the secure and sustainable growth of intelligent manufacturing worldwide.  

During the exhibition, Keli Optoelectronics' booth attracted numerous overseas clients and industry experts from Germany, Japan, South Korea, Southeast Asia, and other regions for in-depth discussions. The company's featured innovations—including next-generation safety laser scanners and intelligent safety light curtains—garnered widespread recognition from international professionals for their exceptional performance and reliable quality. On-site cooperation agreements were reached with multiple overseas partners, demonstrating Keli Optoelectronics' continuously enhanced competitiveness in the global market.   Keli Optoelectronics remains committed to advancing industrial safety technology through innovation. The intelligent safety solutions showcased at this event have already been successfully implemented in multiple overseas projects. Moving forward, the company will deepen its global strategic footprint, actively engage in international market competition, and deliver superior, smarter safety products and technical services to industrial clients worldwide.

SPS – Smart Production Solutions Guangzhou, formerly known as SIAF, was held from 25-26 Feb 2025 in the China Import and Export Fair Complex in Guangzhou. Over the past 16 years, the show has offered a critical sourcing platform to companies seeking to enter the South China manufacturing market. The show’s renaming signifies a renewal of its concept, reflecting its development within the region while elevating it to an official member of the globally-recognised SPS brand. With this change, SPS – Smart Production Solutions Guangzhou will synergise with SPS in Germany, facilitating the flow of resources and expertise between fairs under the brand. KELI showed its safety laser scanner, lidar sensor, safety controller, safety light curtain in the exhibition. The KLMs is with TUV certification. The output can be PNP, PNP+ethernet. Customer can use it for obstacle avoidance or natural navigation. It meets requirements for Europe market, attracting a lot of European customers and Chinese agv manufactuers who export to Europe.

In order to enhance corporate cohesion, enhance teamwork capabilities, and enrich the spare time of employees, KeLi Photoelectronic held a staff sports meeting on September 30, 2021. This sports meeting implements a team points system, and sets up two major categories of collective and individual competitions, during which multiple events such as football, basketball, tug-of-war, skipping rope, table tennis, and badminton were held. In the arena, each event is a competition of wisdom and physical strength, a competition of unity and cooperation. The athletes are passionate and hard-working, and they use practical actions to show the scientific style of national fitness and unity. In the end, the production department, marketing department and technology department won the first, second and third place in the team points competition. On the occasion of the National Day, every Keli staff presents a gift to the 72nd birthday of the motherland with a positive mental outlook.

In 2021, the LET-a CeMAT ASIA event will be fully upgraded, presented by the joint venture company Hannover Milano Best Exhibitions(Guangzhou)Co.,Ltd between Guangzhou Best Exhibition Co., Ltd. and Hannover Milano Fairs Shanghai Ltd. the show will combine the strengths from both partners, by the joint forces, it will become the new driving force to the China logistics market. Importing global resources, LET will provide a high-quality trade fair platform for exhibitors to display, communicate and finding cooperations in Chinese logistics market. In the meantime the show will also bring together the best logistic equipments and technologies from worldwide; explore the current trends of intelligence logistics, automation, information technology, advanced manufacturing, IoT and Logistics 4.0. LET-a CeMAT ASIA event is the best choice for your precise positioning! As the leader of China's photoelectric safety protection device namufacturer, Jining Keli photo-electronic Industrial Co., Ltd (SDKELI) brought its LSPD safety laser scanner, LSPDM safety laser scanner, KLM safety laser scanner, LS lidar sensor to the exhibition. During the exhibition, visitors are very interested in the safety laser scanner products and lidar sensor, which can be used for agv obstacle, navigation and area safety.

Held at the China Import and Export Fair Complex in Guangzhou, SPS – Industrial Automation Fair Guangzhou (SIAF) and the concurrent Asiamold – Guangzhou International Mould & Die Exhibition welcomed 655 exhibitors occupying 40,000 sqm of exhibition space and attracted 50,369 visits. Covering a variety of intelligent industrial automation solutions, mould-making, 3D printing, metalworking, foundry, die-casting, laser and bearing technologies, both fairs presented a one-stop sourcing platform for manufacturing industry players looking to recover and reconnect, following the suspension of numerous global businesses and production lines. As the leader of China's photoelectric safety protection device namufacturer, Jining Keli photo-electronic Industrial Co., Ltd (SDKELI) braught the company's mains products to SIAF. The products contain: safety laser scanner,safety light curtain, automation light curtain, etc. During the exhibition, visitors are very interested in the safety laser scanner products and lidar sensor, which can be used for agv obstacle, navigation and area safety.

The spread of new crown virus pneumonia in various countries has severely affected all walks of life. Many factories had to shut down. Many people lose jobs or work from home. Medical personnel, as the most critical force to fight the epidemic, persist in fighting the epidemic. In China's fight against the epidemic, agv robots have played an important role in hospitals, especially in Wuhan, Hubei. They can perform tasks such as disinfection and drug delivery. The robot can be equipped with a disinfection box for atomizing and disinfecting the hospital. It can cover a disinfection area of 120 square meters per minute. It can replace the work of 4 professional disinfection personnel and can reach the operating room disinfection level standard. It can work continuously for 8 hours on a single charge. Robots are also used to deliver medicine to paramedics. The medical service robot is mainly used for the intelligent distribution of hospital supplies. It is responsible for the delivery of test orders, drug delivery, food delivery to the quarantine area, and recovery of clothing and medical waste. The robot can not only improve the efficiency of ward killing and distribution, but also reduce the risk of cross-infection caused by staff working in the ward for a long time, save the consumption of medical scarce supplies such as protective clothing, and save the time cost of medical staff. During the fight against the epidemic in about 3 months, many agv manufacturers in China launched robots used in hospitals and other scenarios. These companies include: Siasun, Gzrobot, ,Anze Robot, Seer Robotics, Quicktron, Geek+, Mushiny etc. Many of these manufacturers use SDKELI laser lidar for obstacle avoidance and natural navigation. Jining Keli Optoelectronic Industrial Co, Ltd. has more than 20 years of experience in developing and producing optoelectronic protection devices. It developed and produced China's first Cat4 safety light curtain with TUV functional safety certification, China's first CE-rated Cat3 safety laser scanner, and China's first industrial-grade TOF laser radar. LS lidar has two types: obstacle avoidance and data. Obstacle avoidance radar scan radius is 6 meters, 10 meters, 20 meters. Output PNP or NPN. The data radar has a scanning radius of 10 meters and 20 meters, and the output form is ETHERNET. In the context of the spread of the epidemic, in addition to the increasing demand for robots in hospitals, in order to reduce contact in e-commerce platforms, express delivery, and takeaway industries, the demand for agv robots has also surged, which has also brought opportunities for agv manufacturers and accessories manufacturers.

Bending machine protection device is composed of transmitter, receiver, mounting bracket, controllers, when choosing protection device can choose general installation and programming mode, general installation consists of protective devices directly send signals to the bending machine control system, the programming model is suitable for large fully automatic bending machine, the input signal more, everyone can edit signal logic information. Production introduction BLPS laser safety protective device is designed for personal safety used on hydraulic bender. The dynamic test technology it used has passed the Type 4 functional safety assessment by TUV, and get the national invention patent. The product reaches the advanced technological level of similar products. BLPS laser safety device provides protection zone near the die tip of the bender to protect fingers and arms of the operator in close to the upper mold die tip. It is the most effective solution so far to preserves the safety and productivity of the bender. Product composition Consist of emitter, receiver, controller, transmission cable and power cable. Product features Class 1 laser product, safe to human eyes. Set L- type protective beam near the upper mold die tip and the detecting beam move parallel with the upper mold die tip. Comprehensive function design to meet the security requirements of processing different shapes of the workpiece; Independent control system, the applicable to the bender without the programming ability. Good resistance to electromagnetic interference and light interference. Application Sensors can be used alone with the control system of the press brake. Three detecting beams provide six channels of OSSD outputs, and each detecting beam provides two independent safety outputs in the form of PNP. Receiver outputs high level under the light-passing state and outputs low level under the light-shaded state. After the object which is blocking the detecting beam remoed, OSSD automatically turns to the ON-state.

Widely used in automobile, motorcycle, mold making,precision machinery, footwear, household , appliances, cultural imitation, costume design, heavy industry, light industry and other . Manufacturing industries, greatly enhance the industry productivity. Product Introduction:The detecting zone includes protective area and warning area. The maximum radius of protective area in 4m and the dark object with reflectivity low to 1.8% can be detected reliably in this area; the maximum radius of warning area is 15m and the object with the reflectivity more than 20% can be detected reliably in this area. When a person or an object enters the detecting zone, the scanner sends an alarm signal or a stop signal. Users can set the detecting zone to any complex and irregular shape according to the site requirement. Product composition Consist of scanner, power cable, configuration cable and configuration software. Product features LSPD is the first Safety Laser Scanner in China. The performance can meet advanced level in the world. It meetssafety requirement of IEC 61496 Type 3 and ISO 13849 PLd. Maximum scan radius 15, maximum scan range 190 degree. User can set the protection area and warning area according to requirement by connecting the scanner with computer. Class 1 laser product. Safe with human eye. Fast response speed. 25000 scanning times can be finished in 1 second. The default response time is 80ms. High detecting resolution, angle resolution is 0.36 degree. Object of 7cm radius can be detected at 4 meter. Narrow band filting technology, high capacity of anti light interference. Professional EMC design and stern test to ensure the product is stable and reliable under complicated electromagnetic environment.

KS06 AOPD can effectively detect all opaque objects in the light curtain area that exceed the detection accuracy.An invisible infra-red signal is sent from the emitter and this is picked up by the lens system of the receiver and evaluated either by an integral or external safety monitoring module. If the light beam is interrupted, the secure outputs are switched.

Bending machine protection device is composed of transmitter, receiver, mounting bracket, controllers, when choosing protection device can choose general installation and programming mode, general installation consists of protective devices directly send signals to the bending machine control system, the programming model is suitable for large fully automatic bending machine, the input signal more, everyone can edit signal logic information. Production introduction BLPS laser safety protective device is designed for personal safety used on hydraulic bender. The dynamic test technology it used has passed the Type 4 functional safety assessment by TUV, and get the national invention patent. The product reaches the advanced technological level of similar products. BLPS laser safety device provides protection zone near the die tip of the bender to protect fingers and arms of the operator in close to the upper mold die tip. It is the most effective solution so far to preserves the safety and productivity of the bender. Product composition Consist of emitter, receiver, controller, transmission cable and power cable. Product features Class 1 laser product, safe to human eyes. Set L- type protective beam near the upper mold die tip and the detecting beam move parallel with the upper mold die tip. Comprehensive function design to meet the security requirements of processing different shapes of the workpiece; Independent control system, the applicable to the bender without the programming ability. Good resistance to electromagnetic interference and light interference. Application Sensors can be used alone with the control system of the press brake. Three detecting beams provide six channels of OSSD outputs, and each detecting beam provides two independent safety outputs in the form of PNP. Receiver outputs high level under the light-passing state and outputs low level under the light-shaded state. After the object which is blocking the detecting beam remoed, OSSD automatically turns to the ON-state.

KS06 AOPD can effectively detect all opaque objects in the light curtain area that exceed the detection accuracy.An invisible infra-red signal is sent from the emitter and this is picked up by the lens system of the receiver and evaluated either by an integral or external safety monitoring module. If the light beam is interrupted, the secure outputs are switched.

Product introduction:SDKELI LSC2 light curtain is designed for automation field, with small size, compact structure and strong anti-interference ability, and the product meets IEC 61496-2 standards. Product features. High-securiry miniaturized light curtain is researched and developed using TUV-proven light curtain technology platform; High-reliability miniaturized light curtain has small size and internal skeleton supportm so the structure is stable and reliable;Miniaturized light curtain features high cost performance, superior performance and high reliability and low cost;CAN bus communication is used to ensure the security and anti-interference ability of system;It is equiped with NPN and PNP integrated output to achieve flexible wiring and easy field applications;It is equiped with end cap integrated status indication to clearly identify the operating status of light curtain from a far distance;Small size, nice structure and flexible installation (front-mounted, side-mounted and T-slot installation);Flexible cable swinging output mode is used, which can save mounting space. Product Components It is composed of emitter, receiver and transmission cable.

product description The LSPD Safety Laser Scanner is based on two-dimensional optical scanning and ranging principles. It provides a two-dimensional inspection area with a maximum radius of 15m and an angle of 190 °. The detection area includes a protection area and a warning area. It is possible to reliably detect that the maximum radius of the protected area is 4 m, and it is possible to reliably detect a dark object having a reflectance as low as 1.8%. The maximum radius of the warning zone is 15m, in which objects with a reflectivity greater than 20% can be reliably detected. When a person or object enters the detection area, the scanner will send an alarm or stop signal. The user can set the detection area to an arbitrarily complex and irregular shape according to the needs of the site. product composition Includes scanner, power cord, configuration cable and configuration software. Features LSPD is China's first safety laser scanner. Performance has reached the world's advanced level. Meets the safety requirements of IEC 61496 Type 3 and ISO 13849 PLd. The maximum scanning radius is 15 and the maximum scanning range is 190 degrees. By connecting the scanner to the computer, the user can set the protection zone and warning zone as needed. Class 1 laser products. Human eyes are safe. quick response. 25,000 scans can be completed in 1 second. The default response time is 80 milliseconds. High detection resolution with an angular resolution of 0.36 degrees. An object with a 7 cm radius can be detected at 4 meters. Narrow-band filtering technology, strong resistance to light interference. Professional EMC design and rigorous testing ensure that the product is stable and reliable in complex electromagnetic environments.

Production Introduction:LS series of laser radar can achieve the two-dimensional zone detection and profile scanning with a range of 270° and a radius of 10m, featuring small size, high flexibility, good precision and reliability and high cost performance, so it is the ideal choice for the obstacle avoidance and navigation of mobile robot. Obstacle Scanner Radar Lidar Navigation Sensor PNP NPN Output 270 Degree Angle User Configuration Scanning Area Field Detector Product composition The LS system is composed of one laser radar, one distribution line and configuration software. Users can use the configuration cable to connect the lidar with the computer, and configure the protection zone and other related parameters through the configuration software. Product features It is the current smallest domestic pulse laser radar on the market, with dimensions of 6cm×6cm×8cm, thus facilitating user integration; Based on pulse laser ranging technology, the pulse light energy value is 1000 times higher than that of a continuous constant light source, thus ensuring the stability and reliability of measurement. Meanwhile, combined with nanosecond narrow pulse technology, it is Class 1 laser product which is safe to human eyes; With very fast scanning speed, it can complete 25000 times of measurement within 1s, and the scanning time of single turn is 40ms; With industrial design, it is stable and reliable. IP65, dedicated temperature drift error elimination design, professional EMC design and harsh testing, environmental light, shock and vibration and other tests; Forklift Laser Guide Lidar Position Sensor Autonomous Service Robots Obstacle Lidar Detector TOF Navigation Guidance Obstacle Laser Radar Lidar Sensor The detachable window design can facilitate maintenance, reduce maintenance costs and improve the service life of product. There are 16 groups of definable detection zones at most. The detection zones can be defined as any complex and irregular shapes according to user needs.

Suitable to the actual filed conditions, protection height, resolution spacing, distance etc. can be tailored. Exclusively designed IC for improved the noise resistance. Inside surge protection, reverse polarity protection, overcurrent protection. Long use-life cycle and high reliability, easy install, enconomic price. SDKELI T4 series safety light curtain is the first safety light curtain that has passed TUV certification. It can be used to integrate the controller functionsinto the sensor. It is the safety light curtain provided to the device that does not require a controller but requires level signal control through risk assessment. It can output two-way safe PNP signals. Product features Dual independent OSSD output; External relay contact monitor (EDM) function; Provide two-way PNP signal output, with higher safety performance; The detection ability is up to 14mm, suitable for finger protection; The maximum operating range is up to 6m; With good vibration damping performance, it is applicable to the presses with high speed and large or small tonnage, featuring a long service life; Output overload and short circuit protection; Infrared light communication and special optical system; The ability to resist light interference and electromagnetic interference is strong and the operating is more stable;

The Guangzhou International Industrial Automation Technology and Equipment Exhibition (SIAF) is a series of exhibitions in Asia at the SPS IPC Drives Electrical Automation Exhibition in Nuremberg, Germany. Thanks to the exhibition experience of the Frankfurt exhibition and the integration and utilization of resources with other brand technology exhibitions, as well as the efforts and support of the partners, the exhibition has achieved great success, and the degree of internationalization and specialization has been continuously improved. Since its inception, the exhibition has successfully brought more international brands to the audience, and has gathered the opinions of German industry experts to hold a series of high-end seminars to reveal the development of the industry, helping the industry to understand the international leading technology and promote the development of the industry. SDKELI specializes in the research and development of integrated technologies of light, machine and electricity, and is affiliated to the Shandong Academy of Sciences. The company's leading products are laser light protection devices for safety light curtains, automated gratings, laser radars and bending machines. They are mainly used for personal safety protection in the fields of forging machinery, automation, logistics warehousing and rail transit, and are leader of China's photoelectric safety protection device technology. China Import and Export Fair Complex March 10-12 SDKELI booth: C27 at Hall 5.1 Looking forward to your visit

The safety light curtain is also called photoelectric safety protection device (also called safety protector, punch protector, infrared safety protection device, etc.). In modern factories, people work more with machines on potentially hazardous machinery such as stamping machines, shearing equipment, metal cutting equipment, automated assembly lines, automated welding lines, mechanical transfer handling equipment, hazardous areas (toxic, High pressure, high temperature, etc.), it is easy to cause personal injury to workers. Safety light curtain operation method 1. Check whether the safety light curtain is firmly fixed on the equipment to be equipped, whether the transmitter and receiver of the light curtain sensor are in a plane, and the protection area bounded by the transmitter and the receiver should be in the plane. A rectangle. 2. Check that the transmitter and receiver of the safety light curtain are properly assembled in place with the respective cables and that the terminals of the cable are accurately and securely connected to the power supply and control unit. 3. Turn on the power to the safety light curtain sensor. At this time, the light curtain sensor starts self-test, synchronization and self-calibration. After about 1 second, the yellow indicator light of the transmitter is stable, and the receiver indicator lights are all off, indicating that the light curtain sensor is normal working status. working state 1. When there is no intruding object in the protection area, the receiver of the sensor is in the light receiving state. At this time, the communication indicator (red light) of the receiver should be off, the emission indicator (yellow light) will be lit, and then the press is protected. The working switch of the equipment, the equipment can work normally. 2. When an object (not less than the minimum detectable body or resolution) invades the protection area, the receiver's red indicator light will be illuminated (either the receiver is in the blackout state or the optical communication is blocked). The device is controlled by the protection device and is in a forced pause state. 3. When the intruding object withdraws from the protected area, the light curtain sensor will return to the 1. state and the device will continue to work. 4. After the safety light curtain sensor is turned into the working state, use the test rod with the smallest diameter of the detector (or an opaque object of the same diameter, vertically invade the protection area, and translate in the protection area in clockwise and counterclockwise directions respectively). Movement, at this time the light curtain sensor should always have a red indicator light lit, and the controlled device will not work.

At present, the measurement principle of lidar is mainly divided into three types: pulse method, coherent light method and trigonometry method. Among the main measurement principles of lidar applications, the pulse method and the coherent light method have high requirements on the hardware of the laser radar but the measurement accuracy is much higher than the laser triangulation method. So it is mostly used in the military field. In contrast, the laser triangulation method meets most industrial and civil requirements due to its accuracy and low cost. Most of the domestic laser radar manufacturers use the triangulation method and the phase ranging method. One is the coaxial pulsed TOF technology, Time of Flight. It is a way of measuring the time of light flight. In this way, as the name implies, a laser is emitted, and then a diode is used to detect the echo of the laser. We use a high-precision timer to measure the time difference between the emission of the light and the feedback caused by the return of the target. However, we all know that the speed of light is invariant, and then the time difference is multiplied by the speed of light to obtain the distance of the target object. This is the way of distance measurement adopted by the current mainstream industrial-grade laser radars. The thresholds of technology (optics, algorithms, etc.) are relatively high. At present, only SDKELI laser radars in China use this technology. In fact, this measurement method has a big problem: its cost is very high. Because the measurement of the speed of light requires a very high precision timer. This timer does not mean that as long as it can distinguish between milliseconds and microseconds. It need to achieve the measurement accuracy of the picosecond level. In addition, very high quality are required for laser emitter and sensing devices. The other is the measurement method of the phased TOF. The phase type is a continuous emission laser. However, the received echo signal will have a difference in phase due to the characteristics of the speed of light propagation. When checking the phase, you can turn around to handle this distance. The advantage of this approach is that the cost is relatively cheaper, but the main problem is that the speed of measurement cannot be improved. The laser rangefinder currently sold online is the phase method of laser ranging. Laser triangulation method. Basic principle: a laser beam is used to illuminate the object to be measured at a certain angle of incidence. The laser reflects and scatters on the surface of the object. At another angle, the lens is used to converge the reflected laser. The spot is imaged in a CCD (Charge-coupled Device). Component) on the position sensor. When the measured object moves along the laser direction, the spot on the position sensor will move, and the displacement corresponds to the moving distance of the measured object. Therefore, the distance between the measured object and the baseline can be calculated by the algorithm by the algorithm. value. Since the incident light and the reflected light form a triangle, the geometric triangle theorem is applied to the calculation of the spot displacement. Therefore, the measurement method is called the laser triangulation method. According to the angle relationship between the incident beam and the surface normal of the measured object, it can be generally divided into Both oblique and direct type of distance measurement. The biggest advantage of this method is that its cost will be greatly reduced compared to TOF (Time of Flight). The triangulation method is essentially a camera plus a processing chip. Of course, this approach also has some drawbacks. Just like taking a photo, it has a resolution limit. If the resolution is not high and the object is far away, it may not be visible. In the same way, the triangulation method is not very clear for long-distance objects, so there are high challenges to the algorithm here. If the algorithm is not good enough, even if you measure objects that are four or five meters away, problems can occur.