Rechner switch German Rechner model Rechner price

Rechner switch, also known as a displacement switch, is a type of switch used to sense the distance to an object to perform a preset function, and has been widely applied. Main products include mobile phone proximity switches and long-distance measurement switches, applied in smart belts. Proximity switches can be classified into optical proximity switches, infrared proximity switches, ultrasonic proximity switches, etc., based on their working principles. Most proximity switches used in mobile phones are infrared proximity switches, which have an infrared emitting tube and an infrared receiving tube. When the infrared ray emitted by the emitting tube is received by the receiving tube, it indicates that the distance is close, and the screen needs to be turned off to prevent misoperation. When the receiving tube does not receive the infrared ray emitted by the emitting tube, it indicates that the distance is far, and there is no need to turn off the screen. The working principles of other types of proximity switches are similar; they also determine the distance by emitting and receiving a certain substance, such as ultrasonic waves or light pulses.

Rechner switch classification

1) Linear displacement switch: The function of a linear displacement switch is to convert linear mechanical displacement into an electrical signal. To achieve this effect, a variable resistor track is usually fixed at the stationary part of the switch, and different resistance values are measured by the displacement of the wiper on the track. The switch 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 switch 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 switch: Angular displacement switches are applied in obstacle handling: using an angular switch to control your wheels can indirectly detect obstacles. The principle is very simple: if the motor angular switch structure is operating but the gear is not turning, 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 wheel must not slip on the floor (or slip too frequently), otherwise you will not be able to detect the obstacle. An idler gear connected 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 means you have hit an obstacle.

Rechner switch usage precautions

1) If the electronic ruler has been used for a long time, and the seal has aged, mixed with many impurities, and water mixtures and oil will seriously affect the contact resistance of the brush, causing the displayed numbers to jump continuously. At this point, it can be said that the electronic ruler of the linear displacement switch is damaged and needs to be replaced. 2) If the power supply capacity is too small, many issues will arise, so the power supply needs to have sufficient capacity. Insufficient capacity will cause the following situations: the movement of the molten glue will cause fluctuations in the display of the mold closing electronic ruler, or the mold closing movement will cause fluctuations in the display of the injection molding electronic ruler, resulting in large measurement errors. If the driving power of the solenoid valve and the power supply of the linear displacement switch are together, the above situation is more likely to occur. In severe cases, the voltage fluctuations can even be measured using the voltage range of a multimeter. If the situation is not caused by high-frequency interference, static interference, or poor neutrality, it may be caused by insufficient power supply capacity. 3) Frequency modulation interference and static interference may both cause the displayed numbers of the electronic ruler of the linear displacement switch to jump. The signal lines of the electronic ruler and the high-voltage lines of the equipment must be separated in different wire trays. The electronic ruler must mandatorily use a grounding bracket, and the shell of the electronic ruler must have good contact with the ground. Signal lines must use shielded cables, and one end of the shielded cable should be grounded at the electrical box. If there is high-frequency interference, the voltage measurement using a multimeter usually shows normal, but the displayed numbers keep jumping; when static interference occurs, the situation is similar to high-frequency interference. To verify whether it is static interference, you can short-circuit the cover screw of the electronic ruler to some metal parts on the machine using a power cord. As soon as it is short-circuited, the static interference will be eliminated immediately. However, it is difficult to eliminate high-frequency interference using the above method. Variable frequency energy savers and robotic arms often generate high-frequency interference, so you can try stopping the high-frequency energy saver or the robotic arm to verify if it is high-frequency interference. 4) If the display data of the electronic ruler of the linear displacement switch jumps regularly at a certain point during operation, or if there is no display data, you need to check whether the insulation of the connection line is damaged and causing a regular contact with the machine shell, leading to a ground short circuit. 5) The supply voltage must be stable. Industrial voltage needs to meet a stability of ±0.1[%]. For example, if the reference voltage is 10V, a fluctuation of ±0.01V is allowed. 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 ruler is normal. 6) The alignment of the linear displacement switch installation needs to be good, but parallelism allows an error of ±0.5mm, and angle allows an error of ±12°. However, if both parallelism error and angle error are too large, the displayed numbers will jump. In such cases, the parallelism and angle must be adjusted. 7) During the connection process, pay close attention. The three wires of the electronic ruler must not be connected incorrectly, and the power line and output line must not be swapped. If the above wires are connected incorrectly, it will result in large linear errors, making control difficult and reducing control precision, and the display will easily show jumping phenomena, etc.

Rechner switch 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, usually using specialized rulers with verniers for measurement, which leads to large measurement errors due to manual data reading and cannot achieve 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 train wheel flange state parameters increasingly important. The flange detector adopts modern switch 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 switches are used for detecting flange height, width, rim thickness, etc., with displacement switches being the most concerned. There are many types of displacement switches, and the currently new switch technology used for train wheel flange detection is called laser displacement switch. Currently, the laser triangulation method is used for detection on train wheel flanges, offering high precision for short-distance measurements. The displacement switch can be directly installed on the track for detection, or a laser reflective displacement switch can be used as the measuring device. The laser switch module scans the flange shape along a straight line while recording the entire flange data. Through a microprocessor, the entire flange contour curve can be obtained, thereby calculating flange width, flange height, 70mm wear amount, and wear area, etc. Moreover, 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 the wear of wheel sets on online operating trains but also sort out whether wheel set dimensions are qualified on the production line. The development of transportation is inseparable from detection technology, and instruments and meters as well as switch technology are 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 switch technology will bring more safety to people's lives and transportation, and the development of switch technology in China will also drive the development of world-class advanced technologies in transportation internationally.

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