Germany ASA SRL sensors, ASA SRL models, ASA SRL prices

ASA SRL sensors are a general term for sensors designed to detect objects without physical contact, replacing contact-based detection methods such as limit switches. They convert information about an object's movement and presence into electrical signals. Detection methods that convert to electrical signals include those utilizing eddy currents generated in the metallic body of the detected object due to electromagnetic induction, those detecting capacitance changes in the electrical signal caused by the approach of the detected object, and those using reed and guide switches.

ASA SRL sensor classification

1) Linear displacement sensors: 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 typically fixed at a stationary part of the sensor, and different resistance values are measured by the displacement of a wiper on the track. The sensor track is connected to a stable DC voltage, allowing a small current in the microampere range to flow. The voltage between the wiper and the start terminal is proportional to the length of the wiper's movement. Using the sensor as a voltage divider minimizes the requirement for the precise total resistance of the track, because resistance changes caused by temperature variations do not affect the measurement result. 2) Angular displacement sensors: Angular displacement sensors are used for obstacle handling: using angle sensors to control your wheels can indirectly detect obstacles. The principle is very simple: if the motor angle sensor indicates operation but the gear does not turn, it means your machine is blocked by an obstacle. This technology is very simple to use and highly effective; the only requirement is that the moving wheels 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 ASA SRL sensors

1) If the electronic scale 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 scale 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: the movement of the plasticizing unit causes fluctuations in the display of the mold-clamping electronic scale, or the mold-clamping movement causes fluctuations in the display of the injection-molding electronic scale, resulting in significant measurement errors. If the solenoid valve's drive power supply shares the same source as the linear displacement sensor's power supply, the above situations are more likely to occur. In severe cases, voltage fluctuations can even be measured using the voltage setting of a multimeter. If the issue 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 linear displacement sensor's electronic scale to jump. The signal cables of the electronic scale must be routed in separate cable trays from the equipment's high-power lines. The electronic scale must be forcibly grounded using a grounding bracket, ensuring good contact between the electronic scale's housing and the ground. Signal cables must use shielded wires, and one end of the shield 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; electrostatic interference causes similar symptoms. To verify whether electrostatic interference is present, briefly short-circuit the cover screw of the electronic scale to a metal part of the machine using a power cord. Once short-circuited, electrostatic interference is immediately eliminated. However, eliminating high-frequency interference is more difficult using this method. Variable frequency drives and robotic arms often generate high-frequency interference, so you can try stopping the high-frequency drive or robotic arm to verify if high-frequency interference is the cause. 4) If the displayed data of the linear displacement sensor's electronic scale jumps regularly at a certain point during operation, or if there is no display, check whether the insulation of the connection cable is damaged, causing a regular ground short circuit through contact with the machine housing. 5) The supply voltage must be stable. Industrial voltage stability must comply with ±0.1[%]. For example, if the reference voltage is 10V, a fluctuation of ±0.01V is permissible; otherwise, it will cause continuous fluctuations in the display. However, if the amplitude of the display fluctuation does not exceed the amplitude of the voltage fluctuation, the electronic scale is functioning normally. 6) The alignment of the linear displacement sensor installation must be precise, but parallelism allows an error of ±0.5mm, and angularity allows an error of ±12°. However, if both parallelism and angularity errors are excessive, the displayed numbers will jump. In such cases, parallelism and angle adjustments are required. 7) Pay close attention during connection: the three wires of the electronic scale 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.

ASA SRL 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 manual measurement, which leads to significant measurement 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 state parameters increasingly important. The flange detector adopts modern sensor technology, a microcontroller processing system, and a concise, 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 current novel sensor technology 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 in a straight line while recording the entire flange data. A microprocessor then derives the entire flange profile curve, 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, meters, and sensor technology forming the core of detection technology. In today's era of rapid high-speed power development, people desire not only comfort and enjoyment but also, more importantly, safety. The development of sensor technology brings greater safety to daily life and transportation, and the advancement of sensor technology in China will also drive the development of world-class technologies in the transportation sector internationally.

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