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ACS sensors are the direct source of information for the entire machine vision system, mainly consisting of one or two image sensors, sometimes accompanied by light projectors and other auxiliary equipment. The main function of vision sensors is to acquire sufficient raw images for the machine vision system to process. Image sensors can use laser scanners, line-scan and area-scan CCD cameras or TV cameras, as well as newly emerging digital cameras.

ACS sensor classification

1) Linear displacement sensor: The function of a linear displacement sensor is to convert linear mechanical displacement into an electrical signal. To achieve this, a variable resistor track is usually fixed at a stationary part of the sensor, and different resistance values are measured by the displacement of the wiper on the track. The sensor track is connected to a stable DC voltage, allowing a small current in microamperes to flow. The voltage between the wiper and the starting end is proportional to the length of the wiper's movement. Using the sensor as a voltage divider minimizes the requirement for the accuracy of the total resistance of the track, because resistance changes caused by temperature variations do not affect the measurement result. 2) Angular displacement sensor: Angular displacement sensors are applied in obstacle handling: using angle sensors to control your wheels can indirectly detect obstacles. The principle is very simple: if the motor angle sensor is operating but the gear does not rotate, it indicates that your machine is blocked by an obstacle. This technology is very simple to use and highly effective; the only requirement is that the moving wheel must not slip on the floor (or slip too frequently), otherwise you will be unable to detect obstacles. Connecting an idler gear to the motor can avoid this problem; this wheel is not driven by the motor but is driven by the movement of the device: during the rotation of the drive wheel, if the idler wheel stops, it indicates that you have encountered an obstacle.

Precautions for using ACS sensors

1) If the electronic ruler has been used for a long time, and the seal has aged while accumulating many impurities, water mixtures and oil will seriously affect the contact resistance of the brush, causing the displayed numbers to jump continuously. In this case, the electronic ruler of the linear displacement sensor can be considered damaged and needs replacement. 2) If the power supply capacity is too small, various issues may arise; therefore, the power supply must have sufficient capacity. Insufficient capacity can cause the following situations: movement of the plasticizing unit causes fluctuations in the display of the mold-clamping electronic ruler, or movement of the mold clamping causes fluctuations in the display of the injection-molding electronic ruler, resulting in significant measurement errors. If the driving power of the solenoid valve is combined with the power supply of the linear displacement sensor, the above situations are more likely to occur. In severe cases, voltage fluctuations can even be measured using the voltage range of a multimeter. If the situation is not caused by high-frequency interference, electrostatic interference, or poor neutral grounding, it is likely due to insufficient power supply capacity. 3) Frequency modulation interference and electrostatic interference can both cause the displayed numbers on the electronic ruler of the linear displacement sensor to jump. The signal cables of the electronic ruler must be routed in separate cable trays from the high-voltage lines of the equipment. The electronic ruler must be forcibly mounted using a grounding bracket, ensuring good contact between the housing of the electronic ruler and the ground. Shielded cables must be used for signal lines, and one end of the shielded cable should be grounded at the electrical cabinet. When high-frequency interference is present, voltage measurements with a multimeter usually appear normal, but the displayed numbers continue to jump; similar symptoms occur with electrostatic interference. To verify whether it is electrostatic interference, briefly short-circuit the cover screw of the electronic ruler to some metal part of the machine using a power cord. Once short-circuited, the electrostatic interference will be eliminated immediately. However, eliminating high-frequency interference is difficult using the above method. Variable frequency drives and robotic arms often generate high-frequency interference, so you can try stopping the high-frequency drive or the robotic arm to verify if high-frequency interference is the cause. 4) If the displayed data of the electronic ruler of the linear displacement sensor jumps regularly at a certain point during operation, or if there is no display, check whether the insulation of the connection cable is damaged and causing a regular short circuit to ground through contact with the machine housing. 5) The supply voltage must be stable. Industrial voltage stability needs to comply with ±0.1[%]. For example, if the reference voltage is 10V, a fluctuation of ±0.01V is allowed. Otherwise, it will cause significant fluctuations in the display. However, if the amplitude of the display fluctuation does not exceed the amplitude of the voltage fluctuation, the electronic ruler is functioning normally. 6) The alignment of the linear displacement sensor installation must be precise, but parallelism allows an error of ±0.5mm, and angular alignment allows an error of ±12°. However, if both parallelism and angular errors are excessive, the displayed numbers will jump. In such cases, parallelism and angle adjustments must be made. 7) During connection, pay close attention: the three wires of the electronic ruler must not be connected incorrectly, and the power and output lines must not be swapped. Incorrect wiring will result in significant linearity errors, making control difficult and reducing control precision, while the display is prone to jumping.

ACS sensor applications

The geometric state parameters of train wheel flanges affect the speed and smoothness of train operation and are crucial for safe train operation. Traditional detection methods are relatively complex, typically using specialized calipers for measurement, which leads to significant errors due to manual data reading and prevents digital management of detection data. With the development of China's railway industry, train speeds are increasing, making precise and rapid inspection and digital management of wheel flange status parameters increasingly important. The flange detector adopts modern sensor technology, a microcontroller processing system, and a concise and stable mechanical structure, enabling convenient and precise continuous rapid measurement of geometric state parameters, achieving digitization of parameters such as flange height and rim thickness. Many sensors are used for detecting flange height, width, rim thickness, etc., with displacement sensors being of primary concern. There are many types of displacement sensors; the novel sensor technology currently used for train wheel flange detection is called laser displacement sensors. Currently, laser triangulation is used for train wheel flange detection, offering high precision for short-distance measurements. The displacement sensor can be directly installed on the track for detection, or a laser reflective displacement sensor can be used as the measuring device. The laser sensor module scans the flange shape along a straight line while recording the entire flange data. The entire flange profile curve can be derived via a microprocessor, thereby calculating flange width, flange height, 70mm wear volume, and wear area. Furthermore, the measured data can be uploaded to a computer to generate a database, utilizing advanced post-processing software for digital management of train wheel flanges. It can not only measure wheelset wear on trains in operation but also sort wheelsets on the production line based on dimensional compliance. The development of transportation relies on detection technology, with instruments and sensor technology being the core of detection technology. In today's era of rapid power development, people not only hope to experience comfort and enjoyment but also desire safety. The development of sensor technology will bring greater safety to people's lives and transportation, and the development of sensor technology in China will also drive the advancement of world-class technologies in the transportation sector internationally.

Weidou Intelligent Technology specializes in selling German ACS sensors, ACS proximity sensors, ACS distance sensors, ACS vision sensors, ACS displacement sensors, ACS torque sensors, ACS speed sensors, ACS photoelectric sensors, ACS position sensors, ACS angle sensors, ACS tactile sensors, ACS temperature sensors, ACS pressure sensors, ACS flow sensors, ACS level sensors, ACS motion sensors, ACS process sensors. Original imports from Germany. Welcome customers to inquire and order.