German GEFRAN sensors GEFRAN models GEFRAN prices

GEFRAN sensors are sensors that use laser technology for measurement. They consist of a laser emitter, a laser detector, and a measurement circuit. Laser sensors are a new type of measuring instrument; their advantages include the ability to perform non-contact long-distance measurement, high speed, high precision, large measuring range, and strong resistance to optical and electrical interference.

GEFRAN 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 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 the microampere range 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 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 structure is operating but the gear does not rotate, it indicates that your machine has been 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 GEFRAN 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 to be replaced. 2) If the power supply capacity is too small, many issues may arise; therefore, 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 ruler, or the mold-clamping movement will cause fluctuations in the display of the injection-molding electronic ruler, resulting in significant measurement errors. If the driving power of the solenoid valve and the power supply of the linear displacement sensor are shared, 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 grounded 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 will continue to jump. Similarly, when electrostatic interference occurs, the situation is the same as with high-frequency interference. To verify whether it is electrostatic interference, you can 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, it is difficult to eliminate high-frequency interference 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 display data of the electronic ruler 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 cable is damaged and causing regular contact with the machine housing, leading to 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 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 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, the parallelism and angle must be adjusted. 7) During connection, 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 wires are connected incorrectly, it will result in significant linearity errors, making control difficult and reducing control precision, while the display will easily exhibit jumping phenomena, etc.

GEFRAN 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, usually involving measurement with specialized calipers, 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 train 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, thus 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 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, etc. 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 desire comfort and enjoyment but also prioritize safety. The development of sensor technology will bring greater safety to people's lives and transportation, and the advancement of sensor technology in China will also drive the development of world-class advanced technologies in the transportation sector internationally.

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