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Mahle sensors are used in robots to mimic tactile functions. Touch is an important sensory function when humans come into direct contact with the external environment. Developing tactile sensors that meet requirements is one of the technical keys in robot development. With the development of microelectronics and the emergence of various organic materials, a variety of development plans for tactile sensors have been proposed, but most are currently in the laboratory stage, with few reaching commercialization. Tactile sensors can be roughly classified by function into contact sensors, force-torque sensors, pressure sensors, and slip sensors.

Mahle 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 effect, a variable resistor slide rail is usually fixed at a stationary part of the sensor, and different resistance values are measured by the displacement of the wiper on the slide rail. The sensor slide rail 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 slide rail, 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 turn, 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 not be able 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 hit an obstacle.

Precautions for using Mahle sensors

1) If the electronic scale has been used for a long time, and the seal has aged while containing 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, many issues may arise, so the power supply must 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 clamping electronic scale, or the mold clamping movement will cause fluctuations in the display of the injection molding electronic scale, resulting in large 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 neutrality, it may be due to insufficient power supply capacity. 3) Frequency modulation interference and electrostatic interference can both cause the displayed numbers on the electronic scale of the linear displacement sensor to jump. The signal lines of the electronic scale must be separated from the high-power lines of the equipment in separate wire troughs. The electronic scale must mandatorily use a grounding bracket, and ensure good contact between the housing of the electronic scale and the ground. Signal lines must use shielded cables, and one end of the shielded cable should be grounded at the electrical box. When there is high-frequency interference, voltage measurements with a multimeter usually appear normal, but the displayed numbers will keep jumping; electrostatic interference presents similar symptoms. To verify whether it is electrostatic interference, you can short-circuit the cover screw of the electronic scale to some metal part of the machine using a power cord. Once short-circuited, 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 robotic arm to verify if high-frequency interference is the cause. 4) If the displayed data of the electronic scale of the linear displacement sensor jumps regularly at a certain point during operation, or if there is no display data, check whether the insulation of the connection wire is damaged, causing a regular contact with the machine housing and resulting in a ground short circuit. 5) The supply voltage must be stable. Industrial voltage requires stability within ±0.1[%]. For example, if the reference voltage is 10V, a fluctuation of ±0.01V is allowed. Otherwise, it will cause significant display fluctuations. 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 good, but parallelism allows an error of ±0.5mm, and angularity allows an error of ±12°. However, if both parallelism and angularity errors are too large, 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 scale must not be connected incorrectly, and the power line and output line must not be swapped. If the wires are connected incorrectly, it will result in large linear errors, making control difficult and reducing control precision, while the display is prone to jumping.

Mahle 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 complex, usually involving specialized rulers with verniers for measurement, leading to significant errors due to manual data reading, and preventing 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 the primary focus. 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 along a straight line direction while recording the entire flange data. The entire flange contour curve can be derived via a microprocessor, thereby calculating flange width, flange height, 70mm wear amount, 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 high-speed 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 development of world-class advanced technologies in transportation internationally.

Weidou Intelligent Technology professionally sells German Mahle sensors, Mahle proximity sensors, Mahle distance sensors, Mahle vision sensors, Mahle displacement sensors, Mahle torque sensors, Mahle speed sensors, Mahle photoelectric sensors, Mahle position sensors, Mahle angle sensors, Mahle tactile sensors, Mahle temperature sensors, Mahle pressure sensors, Mahle flow sensors, Mahle level sensors, Mahle motion sensors, Mahle process sensors. Original German imports. Welcome customers to inquire and order.