German ALU MET sensors, ALU MET models, ALU MET prices

ALU MET sensors precisely measure the actual displacement of the detected product by detecting the absolute position of the moving magnetic ring through internal non-contact measurement and control technology; the high precision and high reliability of these sensors have been widely applied in thousands of practical cases. Since the moving magnetic ring used for position determination and the sensitive element do not come into direct contact, the sensors can be used in extremely harsh industrial environments and are not easily affected by oil stains, solutions, dust, or other contaminants. In addition, the sensors use high-tech materials and advanced electronic processing technology, enabling them to operate in high-temperature, high-pressure, and high-vibration environments. The sensor output signal is an absolute displacement value; even if the power is interrupted and reconnected, data is not lost, and there is no need to re-zero. Since the sensitive element is non-contact, repeated detection causes no wear to the sensor, greatly improving detection reliability and service life.

ALU MET sensor classification

1) Laser speed measurement: With the rise of precision manufacturing and the need to save costs, non-contact speed sensors are gradually replacing contact speed sensors. Currently, the most common and high-precision non-contact laser speed sensor on the market is the ZLS-Px aberration speed sensor. The aberration speed sensor has two ports: one emission port that emits a LED light source, and one high-speed photography port that achieves CCD area high-speed imaging comparison. By comparing images at two points in time within an extremely short period, the distance the object moves is determined, and combined with the algorithm inside the sensor, the speed of the object is output in real time. As shown in the figure, (1) is the LED light emission port, (2) is the camera reception port, (3) and (4) are terminal blocks, and (5) are fixing screw holes. The (1) LED light emission port emits laser light toward the object under test; after reflection, it reaches the (2) camera reception port. Upon receiving the signal, it is transmitted to the signal processor, which calculates the speed via an algorithm. The ZLS-Px aberration speed sensor can simultaneously measure speed and length in two directions. It can detect not only whether the object has stopped but also its direction of motion. Fix the sensor on a stable bracket to ensure that the rotating object does not generate excessive vibration during rotation, thereby allowing measurement of the rotation angle and rotational speed of the object. 2) Radar speed measurement: Traditional speed measurement mostly involves rotary motion speed measurement and linear motion speed measurement. However, there are many irregular speed measurements in industrial automation, such as athlete speed measurement, traffic vehicle speed measurement, and golf ball speed measurement. Radar speed sensors can meet these requirements.

ALU MET sensor principle

A transmissive speed sensor consists of a slotted or notched disk, a light source, and a phototube. When the disk rotates with the shaft under test, light can only reach the phototube through the holes or notches. When the phototube is illuminated, its reverse resistance is very low, outputting an electrical pulse signal. When the disk blocks the light source, the reverse resistance of the phototube is very high, and there is no signal output. Thus, the rotational speed of the shaft under test can be measured based on the number of holes or notches on the disk. The usual number of disk holes or notches is unclear in the source, so the photoelectric converter outputs 60 pulse signals per revolution of the shaft under test. If the time base signal of the electronic counter is set to 1s, the rotational speed of the shaft under test can be read directly. The principle of a reflective speed sensor is similar to that of the transmissive type, converting changes in received light into electrical signal changes via a phototube, but it obtains pulse signals through light reflection. Typically, reflective material is attached to the measurement area of the shaft under test to form a reflective surface. Commonly used reflective materials include special speed-measuring reflective paper tape (adhesive tape); aluminum foil or other reflective materials can also be used, and sometimes white paint is applied to the measurement area as a reflective surface. The projector and the reflective surface must be properly configured, typically with a distance of 5-15M between them. When the shaft under test rotates, the photoelectric element receives pulsed illumination and outputs corresponding electrical signals to the electronic counter, thereby measuring the rotational speed of the shaft. The waveform of the output signal from photoelectric speed sensors is relatively regular, close to a standard square wave, with almost no interference signals generated. However, vibration reduces the lifespan of the light source in transmissive types, so they are not suitable for conditions with strong vibration. Reflective types have no mechanical connection with the shaft under test and are convenient to use.

ALU MET sensor industry applications

1) Modern vehicles are generally equipped with engine control, autonomous driving, ABS, TRC, automatic door locking, active suspension, guidance systems, electronic instruments, and other devices, All these devices require the vehicle speed signal. Therefore, The accuracy and stability of the output signal from the vehicle speed sensor will have a significant impact on these control units. Automotive speed sensors mostly adopt a Hall-effect structure, A Hall speed sensor is a magnetoelectric sensor based on the Hall effect, Characterized by high sensitivity to magnetic fields, stable output signal, high frequency response, strong anti-electromagnetic interference capability, simple structure, and ease of use. It mainly consists of permanent magnets with a specific number of pole pairs (generally 4 or 8 pairs), Hall elements, a rotating mechanism, and input/output connectors. Its working principle is that when the sensor's rotating mechanism rotates under external drive, it drives the permanent magnet to rotate, causing the magnetic field passing through the Hall element to change periodically, which causes the output voltage of the Hall element to change, forming a stable pulse voltage signal through subsequent circuit processing, serving as the output signal of the vehicle speed sensor. The main electrical technical parameters of Hall-effect speed sensors include: high output voltage, low output voltage, duty cycle, period, rise time, fall time, number of pulses per cycle, etc. To ensure product performance reliability, these parameters must be quantitatively tested before leaving the factory. Test systems featuring integration and intelligence, efficient automatic measurement, software calculation, and graphical or tabular display of test results are increasingly favored by automotive speed sensor manufacturers. A comprehensive testing device developed for performance measurement of commonly used Hall-effect vehicle speed sensors. Based on cost considerations, the high-speed counter port of a microprocessor is used for data acquisition from the vehicle speed sensor, and software control is used to implement calculation and graphical display processing of the acquired data. The completed testing device offers advantages such as high testing accuracy, reliable data communication, a user-friendly graphical interface, strong anti-interference capability, simple and intuitive testing process, and low system development cost, having good market potential for widespread adoption, Therefore, speed sensors have significant application prospects in vehicle speed detection. 2) The speed sensor of the belt conveyor adopts a Hall sensor, which is primarily a sensor that utilizes the Hall effect to achieve magneto-electric conversion, The Hall effect has a development history of more than 100 years since it was discovered in 1879, but its application began in the 50s of this century, Due to the rapid development of microelectronics, it has gained attention and widespread adoption, and various types of Hall elements have been continuously developed. China began to increase research on Hall elements in the 70s of the 20th century, After nearly several decades of research and development, it is now possible to produce Hall elements with various performance characteristics, such as: standard type, high sensitivity type, low temperature coefficient type, temperature and magnetic field measurement type, and switch-type Hall elements. Due to the characteristics of Hall sensors, such as high sensitivity, good linearity, high stability, small size, and high temperature resistance, they have been widely applied in various industrial fields, including non-electrical quantity measurement and automatic control, computer devices, and modern military technology.

Weidou Intelligent Technology specializes in selling German ALU MET sensors, ALU MET proximity sensors, ALU MET distance sensors, ALU MET vision sensors, ALU MET displacement sensors, ALU MET torque sensors, ALU MET speed sensors, ALU MET photoelectric sensors, ALU MET position sensors, ALU MET angle sensors, ALU MET tactile sensors, ALU MET temperature sensors, ALU MET pressure sensors, ALU MET flow sensors, ALU MET level sensors, ALU MET motion sensors, and ALU MET process sensors. Original imports from Germany. Welcome inquiries and orders from users.