German LIMATHERM SENSOR sensor, LIMATHERM SENSOR model, LIMATHERM SENSOR price

LIMATHERM SENSOR sensors, also known as linear sensors, are linear devices based on metallic induction. The function of a sensor is to convert various measured physical quantities into electrical signals. In production processes, displacement measurement is generally divided into two types: measuring physical dimensions and measuring mechanical displacement. Depending on the form of transformation of the measured variable, displacement sensors can be classified into analog and digital types. Analog types can be further divided into property-based and structural types. Commonly used displacement sensors are mostly analog structural types, including potentiometric displacement sensors, inductive displacement sensors, synchros, capacitive displacement sensors, eddy current displacement sensors, Hall effect displacement sensors, etc. An important advantage of digital displacement sensors is that they facilitate direct input of signals into computer systems. This type of sensor is developing rapidly and its applications are becoming increasingly widespread.

LIMATHERM SENSOR 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 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 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 an angle sensor to control your wheels can indirectly detect obstacles. The principle is very simple: if the motor with the angle sensor is running but the gear does not turn, 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 not be able to detect the obstacle. 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 LIMATHERM SENSOR 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 fluctuate 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 can cause the following situations: the movement of the plasticizing unit may cause fluctuations in the display of the mold-clamping electronic ruler, or the mold-clamping movement may cause fluctuations in the display of the injection electronic ruler, resulting in significant measurement errors. If the driving power supply 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 setting 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 fluctuate. The signal cables of the electronic ruler must be routed in separate cable trays from the high-power 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 will continue to fluctuate. The situation is similar when electrostatic interference occurs. 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 piece of power cable. 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 fluctuates 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 a regular ground short circuit due to contact with the machine housing. 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 permitted. 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 angular alignment allows an error of ±12°. However, if both parallelism and angular errors are excessive, the displayed numbers will fluctuate. 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 is prone to fluctuation.

LIMATHERM SENSOR 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 specialized calipers for measurement. Manual reading of data leads to significant measurement errors 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, 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 novel sensor technology currently used for train wheel flange profile 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. Alternatively, a laser reflective displacement sensor can be used as the measuring device, scanning the flange profile along a straight line 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 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 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 technologies in the transportation sector internationally.

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