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Q:What is a safety mat? What are the technical specifications of industrial safety mats?

A:DADISICK safety mats are devices used for floor protection in hazardous areas. They generate a switch signal by detecting sufficient pressure, ensuring area safety. They are reliable, easy to install, and versatile. The safety mats have excellent corrosion resistance to various chemicals such as acids, alkalis, and salts, and are expected to work for more than one million cycles. They are made of special heavy-duty PVC plastic and impact-resistant steel plate structures, preventing delamination and withstanding high-temperature welding slag and wheel rolling. The dynamic load capacity reaches 800-1000Kg. DADISICK safety mats are available in sizes ranging from 300X300mm to 1500X1000mm, and can be customized according to customer protection requirements. They come with two types of safety mat edges: aluminum alloy or yellow PVC edges, installed on an aluminum baseplate with pre-set cable channels.Safety mat switches are gradually being introduced into various types of production-oriented enterprises and are widely utilized in these businesses.Introduction to DADISICK Safety Mats:Model: DT11 DT15Detection Method: Pressure sensing methodOperating Force: Maximum Allowed Dynamic Load: Impact Load:Mechanical Life: 3000000 times 3000000 timesEncapsulation and Surface Protective Layer: PVC PVC, CRAmbient Temperature: -20℃——+55℃ -35℃——+65℃Protection Level: IP65Maximum Temperature (23 degrees): 95% (condensation)Response Time: 13msEN1760-1 Reset Command: SupportedISO 13849-1:2006 Cat.3Average Dangerous Failure Time: 30 years

Q:What is an safety interlock switch? How to ensure that it cannot be opened?

A:Electromagnetic security door lock switch: As the name suggests, when power is applied, the lock generates magnetic force, causing the lock to engage and latch onto a small metal piece within the groove. When the power is turned off, the latch will reset and the lock opens as the magnetic force disappears. It also has the feature of unlocking when power is applied, and can control 6 pairs of contacts simultaneously, providing multiple mechanical signal outputs in either normally open or normally closed state. It can control more than 3 devices and can be used in conjunction with safety relays and contactors, offering powerful functionality.To ensure that the electromagnetic security door lock switch is not opened after a power failure, you can consider the following measures:The magnetic lock operates based on electromagnetic principles and does not have any mechanical structure. In recent years, magnetic locks have been widely used in automated production lines. Since they are part of an access control system, they require a power supply, usually a 12V DC power source. To ensure that the door lock is not opened during a power outage, the access control power supply box should be equipped with a backup battery (backup power supply).

Q:What is an infrared high-precision measurement and detection light curtain?

A:With the rapid development of industry, the operation and control technology of machines are becoming more advanced, and automated equipment has become an essential tool in modern factories. However, if safety precautions are not properly implemented, there could be potential safety hazards in hazardous work areas such as punching machines, hydraulic presses, oil presses, intelligent warehousing, and industrial robots. The application of infrared light grid sensors in the field of safety protection is known as safety light curtains/safety light screens/optical protective devices, etc.As the precision requirements for workpieces increase and labor costs become more expensive, along with the widespread use of automated equipment, many industries choose to use automated or semi-automated solutions to overcome tedious and repetitive manual measurements. These solutions are commonly used for measuring the shape, size, volume contour of objects, hole detection, classification detection, positioning detection, edge detection, height limitation detection, vehicle separation, and other aspects.DADISICK's measurement light curtains are derived from safety light curtains and have higher accuracy and technical requirements. Their principle is based on detecting changes in the shape of objects passing through the infrared light curtain by sensing whether the infrared light is obstructed and the number of obstructing blocks.Safety light curtains are commonly used for safety protection and detection positioning. Typically, safety light curtains are used as switch signals, with normally closed mode used for personal safety protection and normally open mode used for detecting the position of workpiece productsDADISICK's QL measurement light curtains usually communicate with safety light curtains using RS485/RS232/analog current/analog voltage. Of course, we also support network port output. The purpose is to transmit the signals detected by the measurement light curtains through communication to the PLC or controller to obtain the required data.

Q:What is LiDAR?

A:LiDAR, also known as Light Detection and Ranging, is a system that combines laser, Global Positioning System (GPS), and Inertial Measurement Unit (IMU) technologies to collect data and generate precise Digital Elevation Models (DEMs). By combining these three technologies, LiDAR can accurately locate the spot where the laser beam hits an object and achieve centimeter-level ranging accuracy. The greatest advantages of LiDAR are its precision and efficiency in operation.LiDAR can accurately and precisely obtain information such as the distance and speed of a target or achieve target imaging. The working principle of LiDAR involves the laser beam being directed through a scanning unit to form a beam angle deviation, which interacts with the target to produce reflection/scattering echoes. When the receiver is active, echoed photons from the original path can reach the receiver. The receiver forms signal reception through a photodetector and obtains information such as the distance and speed of the target or achieves three-dimensional imaging through signal processing.LiDAR consists of four basic systems: the laser emission system, the laser reception system, the information processing system, and the scanning system. These four systems work together to obtain a large amount of positional information in a short period of time and use this information to achieve three-dimensional modeling.1. Laser emission system: A laser source periodically drives the laser emitter to emit laser pulses. The laser modulator controls the direction and number of emitted laser beams through a beam controller, and the emitted laser is directed onto the target object through the emission optical system.2. Laser reception system: A photodetector receives the laser reflected by the target object through the reception optical system and generates a reception signal.3. Information processing system: The received signals are amplified, processed, and converted into digital signals. The information processing module then calculates the surface shape, physical properties, and other characteristics of the target object to establish a target model.4. Scanning system: It rotates at a stable speed to scan the plane and generate real-time positional information.The classification of LiDAR be done based on different factors:1. Functional and Usage Classification: Tracking LiDAR (for range and angle measurement), Motion Target Indication LiDAR (for obtaining target Doppler information), Flow Velocity Measurement LiDAR (for measuring Doppler information), Wind Shear Detection LiDAR, Target Identification LiDAR, Imaging LiDAR (for measuring the reflected intensity and distance signals of different parts of a target), and Vibration Sensing LiDAR.2. Working System Classification: Doppler LiDAR, Synthetic Aperture Imaging LiDAR, Differential Absorption LiDAR, Phased Array LiDAR, Portable LiDAR, Ground-based LiDAR, Vehicle-mounted LiDAR, Airborne LiDAR, Shipborne LiDAR, Spaceborne LiDAR, and Missile-mounted LiDAR.3. Working Medium Classification: Solid-state LiDAR, Gas LiDAR, Semiconductor LiDAR, Diode-Pumped Solid-State LiDAR, etc.4. Detection Technology Classification: Direct Detection Type, Coherent Detection Type.5. Platform Classification: Portable LiDAR, Ground-based LiDAR, Vehicle-mounted LiDAR, Airborne LiDAR, Shipborne LiDAR, Spaceborne LiDAR, and Missile-mounted LiDAR, among others.Lidar can be classified according to several factors:1. Function and Purpose: This includes tracking radar (for distance and angle measurements), motion target indication radar (to obtain target Doppler information), flow velocity measurement radar (to measure Doppler information), wind shear detection radar, target recognition radar, imaging radar (to measure the reflection intensity and distance of different parts of a target), and vibration sensing radar.2. Operating System: This includes Doppler lidar, synthetic aperture imaging lidar, differential absorption lidar, phased array lidar, portable lidar, ground-based lidar, vehicle-mounted lidar, airborne lidar, shipborne lidar, and satellite-based lidar.3. Working Medium: This includes solid-state lidar, gas lidar, semiconductor lidar, diode-pumped solid-state lidar, etc.4. Detection Technology: This includes direct detection type and coherent detection type.5. Platform: This includes portable lidar, ground-based lidar, vehicle-mounted lidar, airborne lidar, shipborne lidar,-based lidar, and missile-carried lidar.Advantages of laser radar include:1. High resolution: Laser radar can achieve high angular, distance, and velocity resolution, which means it can produce very clear images using Doppler imaging techniques.2. High accuracy: Laser beams propagate in straight lines, have good directionality, narrow beams, and low dispersion, resulting in high accuracy.3. Strong resistance to active interference: Unlike microwave and millimeter-wave radar, which can be easily affected by electromagnetic waves widely present in nature, laser radar has few sources of interference in nature, making it highly resistant to active interference.4. It has extremely high distance, angle, and velocity resolution: Detection accuracy is within centimeters, enabling precise identification of the specific contours and distances of obstacles without missing or misjudging obstacles ahead.5. Rich information acquisition: Laser radar can directly obtain information such as distance, angle, reflection intensity, and velocity of targets, and can generate multidimensional images of targets. High-frequency lasers can obtain approximately 1.5 million position point information in one second, accurately recovering the three-dimensional features of the surrounding environment using the distance information from these point clouds.6. All-weather operation: Unlike millimeter-wave radar, laser radar can detect human bodies, and its detection range is longer than that of cameras.7. Long detection range: Laser radar's wavelength is in the range of thousands of nanometers, with good directionality, no steering, and no diffusion with increasing distance. It is not limited by pixels and light.

Q:What is a long-distance bi-directional projection screen? What are its advantages?

A:DADISICK-QA series long-distance bi-directional safety light curtains are safety devices that utilize the principle of bi-directional projection. They are mainly used in applications that require coverage of larger areas, such as robotic automation production lines and automotive assembly lines. Compared to traditional safety light curtains, the DADISICK-QA series offers several advantages:1. Wide Coverage: Long-distance bi-directional safety light curtains can cover larger areas, replacing multiple sets of traditional safety light curtains, reducing equipment costs and the difficulty of installation and maintenance.2. Extended Range: Traditional safety light curtains typically have a range of a few meters, while long-distance bi-directional safety light curtains can reach tens of meters, meeting specific requirements.3. Fast Response Time: Due to the bi-directional principle, long-distance bi-directional safety light curtains have a very fast response time, detecting objects in milliseconds and ensuring the safety of operators and equipment.4. Strong Anti-Interference Capability: Long-distance bi-directional safety light curtains use digital signal transmission, effectively resisting the influence of electromagnetic interference and other sources of interference.Indeed, long-distance bi-directional safety light curtains have various advantages, including wide coverage range, extended operating distance, fast response time, and strong anti-interference capability. These features make them widely applied in industries such as robotic automation production lines and automotive assembly lines, where large areas need to be covered for safety purposes.

Q:What is the working principle of a colored metal identification sensor?

A:A colored metal identification sensor is a type of sensor that utilizes the principle of eddy currents for detection. Its working principle involves generating an alternating magnetic field through an induction coil, which induces eddy currents in the object being detected, thereby changing the electrical parameters of the coil. This allows for the determination of the properties and characteristics of the detected object. The specific process is as follows: 1. Generate a magnetic field: The coil in the sensor generates a high-frequency alternating magnetic field by carrying current. 2. Induce eddy currents: When a metal object approaches, the magnetic field induces the generation of eddy currents, which affect the electrical parameters of the sensor. 3. Detection: By detecting and analyzing the changes in the electrical parameters, the type and characteristics of the detected object can be determined. Colored metal identification sensors are primarily used in industries that require the detection of colored metals (such as copper, aluminum, etc.) in metal materials, such as scrap recycling, waste sorting, and metal processing.

Q:In order to ensure safety in manufacturing enterprises, several measures can be implemented?

A:In industrial production, various high-risk production equipment is used, such as punching machines, bending machines, and shearing machines. Without proper safety measures, these devices can easily cause accidents during operation, posing a serious threat to the personal safety of workers.In this era, which values talent, recruiting has become increasingly difficult. Every employee wants to work in a safe environment, so they choose workplaces where they feel secure. Therefore, it is necessary to prioritize the safety protection of dangerous machinery equipment.Optoelectronic protection devices are high-level safety protection devices that maximize the personal safety of workers and ensure safe production.With the installation of optoelectronic protection devices on equipment, employees can use these devices with peace of mind, no longer worrying about injuries to their hands or other body parts. Companies no longer have to worry about paying high compensation for employee injuries. This is beneficial for both parties.When we talk about optoelectronic protection devices, we are actually referring to safety light curtains. Safety light curtains are now widely used, and their prices are not as expensive as before. A set of light curtains typically ranges from a few hundred to one or two thousand dollars. Even if a workshop has more than ten devices, the cost is not significant compared to the hefty compensation required after an accident. It is definitely worth it.Since optoelectronic protection devices involve safety protection, it is important to find reliable and high-quality ones. For example, Dongguan Dadi Electronic Technology Co.,Ltd. has over 10 years of experience in the field of optoelectronic protection and leads the industry in terms of technology level. They have unique qualities in terms of quality and service, making them a trustworthy brand.

Q:How do automatic alignment correction curtains work?

A:The working principle of measuring light curtain is as follows: The optical protection device detects the misalignment position, and if there is any deviation, it sends out a signal. The optical misalignment software system then performs editing and calculation operations on the signal and sends out control signals. The external actuator is driven by the control system to make corrections in the movement of the material, thus controlling the material to move in a straight line.Dadisick's QL series measuring light curtain is suitable for use on various roll-to-roll equipment, such as paper rolls, films, fabrics, non-woven fabrics, and metal foils. It can perform both single-side and double-side misalignment correction. It features a simple wiring installation method and diverse output functions.The main features of the Dadisick's QL series measuring light curtain are as follows:1. It can be widely used in industries such as printing and packaging, papermaking, film, and that require control of edge alignment.2. The QL series measuring light curtain has a sturdy structure and can perform single-side, double-side, and center alignment correction. The wiring and installation methods are diverse, making it easy to operate.3. It can detect over long distances and is easy to align, with a maximum detection accuracy of 1.25mm.4. It offers multiple scanning modes, including parallel scanning and cross scanning.5. It has RS485 or RS232 communication capabilities, allowing communication with a host computer using the standard MODBUS protocol.6. The detection distance can reach up to 20,000mm, with a typical protection height ranging from 30-2000mm. The light beam spacing options include 1.25mm, 2.5mm, 5mm, and 10mm, making it suitable for high-precision detection and measurement.📘 Need more detailed information?Welcome to download our technical information, or contact technical support directly for help:Download product brochure (PDF)  Contact us now 

Q: How to choose the output mode of a safety light curtain?

A:The output mode (Output Type) of the safety light curtain mainly depends on your equipment control system requirements and safety level design requirements. The following are selection suggestions:Application ScenarioRecommended output modeReasonGeneral industrial automation systemPNP / OSSDQuick response and strong compatibilityJapanese or old PLC control systemNPNMatching control input typeControlling high power devices (motors/contactors)Relay outputDry contacts are safer and can isolate high voltageRequires a high safety level (such as PL e or SIL3)OSSD (dual channel PNP)Redundancy + self-test, meeting ISO 13849-1 standardUse multiple light curtains in series and require intelligent controlOSSD + IO-LinkRemote diagnosis and parameter configurationAdditional suggestions:· Confirm the input type of the PLC or control system (NPN/PNP/dry contact);· Confirm whether the safety function level (such as SIL/PL) needs to be met;· If the supporting equipment requires high-frequency start-stop control, OSSD or PNP solid-state output is recommended;· If it is used for old equipment or electrical isolation is required, it is safer to use relay output.

Q: What are the common output modes of safety light curtains?

A:In order to meet different industrial control systems and safety requirements, safety light curtains usually provide four output modes:1. PNP (common)· The output is positive voltage (+24V DC), and the output is high when a safe state is detected.· Applicable to most PLCs and relay input systems of the "positive trigger" type.· Advantages: strong anti-interference ability and good market compatibility.· Commonly used in European equipment and automation control systems.2. NPN· The output is negative voltage (0V, grounded), and the output is low when a safe state is detected.· Applicable to Japanese control systems or NPN input PLCs.· Disadvantages: Slightly lower anti-interference ability and more rigorous wiring requirements.· Commonly used in some older models or equipment in specific Asian markets.3. Relay output (Relay)· Signal output is carried out through dry contacts, without considering voltage polarity, suitable for high voltage or isolation requirements.· Advantages: strong versatility and wide adaptability; can be used to control high power loads.· Disadvantages: slow response speed (usually tens of milliseconds) and mechanical wear.· Commonly used in traditional mechanical equipment and control circuit isolation occasions.4.OSSD (Output Signal Cut-off Device)· A semiconductor output method (usually PNP type) dedicated to safety light curtains, with dual-channel redundant output to achieve PL e / SIL3 level safety protection.· Features: high safety level, strong fault detection capability, and self-diagnosis of safety circuits.· Commonly used for robot perimeter protection, hazardous area protection, and high safety demand occasions.

Q: How to select a multi-sided access protection light curtain?

A:When purchasing the DADISICK QSA multi-sided light curtain, please refer to the following points according to actual usage needs:1. Number of protection surfaces1 to 4 configurations are available to adapt to different fence layouts.2. Detection distanceSupports a range of 1–45 meters to meet the protection needs of most scenarios.3. Resolution selectionSelect the required resolution based on the detection object (such as fingers, palms, and whole bodies).4. Installation spaceThe mirror reflection design is suitable for applications with limited space but multi-sided monitoring.5. System compatibilityEnsure that it can be integrated into existing safety control systems (such as PLCs, safety relays, etc.).6. Environmental adaptabilityPay attention to whether the dustproof, shockproof, and anti-interference capabilities meet the requirements of the application site.7. Compliance certificationThe product complies with international safety standards such as CE and ISO 13849.8. Technical supportIf you have any questions, you can always contact the DADISICK technical team for professional selection suggestions.

Q: What is the difference between a multi-sided light curtain and a single-sided light curtain?

A:Single-sided light curtains only protect one plane; QSA uses mirror foldback to achieve multi-surface monitoring with one wiring, reducing hardware and installation time, and saving PLC I/O.

Q: What is the QSA Series?

A:QSA is a Multi-Sided Access Protection light curtain developed by DADISICK for four-sided fence protection scenarios. It uses transmitters, reflectors and receivers to form 1-4 infrared networks, which can build a closed safety zone within a distance of 1-45 m.

Q: Is a normally closed safety light curtain safer than a normally open one?

A:Yes, in general, it is safer to use normally closed (NC) contacts than normally open (NO) contacts for safety light curtains for the following reasons:✅ Why is normally closed safer?1. Power failure causes immediate shutdown, default safe state:Normal closed contacts are closed in normal state. Once power is lost, the line is loose, the light curtain fails or the cable is damaged, the circuit will automatically disconnect, causing the system to shut down or enter a safe state.This is the basic principle of "fail-safe design".2. Easier to monitor disconnection or failure:The controller or safety relay can detect whether the circuit is closed in real time. If the contact opens abnormally, an alarm will be immediately issued or the output will be cut off.Normal open contacts cannot be disconnected naturally in the event of a fault, and may be mistakenly believed that the equipment is still operating normally, which poses a risk.3. Safety standard recommendation:International standards (such as ISO 13849-1, IEC 61508) and related mechanical safety specifications also recommend the use of normally closed contacts as safety signal interfaces.