German woehner sensors, woehner models, woehner prices

woehner sensors precisely measure the actual displacement of the detected product by detecting the absolute position of a movable magnetic ring using internal non-contact measurement and control technology. The high precision and high reliability of these sensors have been widely applied in thousands of real-world cases. Since the movable magnetic ring used for position determination does not come into direct contact with the sensitive element, the sensor can be used in extremely harsh industrial environments and is not easily affected by oil stains, solutions, dust, or other contaminants. In addition, the sensor uses high-tech materials and advanced electronic processing technology, enabling it to operate in high-temperature, high-pressure, and high-vibration environments. The sensor output signal is an absolute displacement value; even if power is interrupted and reconnected, data is not lost, and re-zeroing is not required. Because the sensitive element is non-contact, repeated detection causes no wear to the sensor, significantly improving detection reliability and service life.

woehner 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 higher-precision non-contact laser speed sensors on the market are ZLS-Px aberration speed sensors. Aberration speed sensors have two ports: one emission port that emits LED light source, and one high-speed imaging port that implements 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 internal algorithms, the sensor outputs the object's speed 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 mounting screw holes. (1) The LED light emission port emits laser light toward the measured object, which reflects to the (2) camera reception port. Upon receiving the signal, it is transmitted to the signal processor, which calculates the speed via algorithms. ZLS-Px aberration speed sensors can simultaneously measure speed and length in two directions. They can detect whether the measured object has stopped and determine its direction of motion. Mount the sensor on a stable bracket to ensure that the rotating object does not generate excessive vibration during rotation, allowing measurement of the rotation angle and rotational speed of the rotating 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.

woehner 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, thus outputting an electrical pulse signal. When the light source is blocked by the disk, the reverse resistance of the phototube is very high, and there is no signal output at the output terminal. In this way, based on the number of holes or notches on the disk, the rotational speed of the shaft under test can be measured. The number of holes or notches on the disk is usually set to a specific value, therefore, for each revolution of the shaft under test, the photoelectric converter can output 60 pulse signals. 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 the same as that of a transmissive one; it converts changes in received light into changes in electrical signals via a phototube, but it obtains pulse signals through light reflection, typically by adhering reflective material to the measurement area of the shaft under test to form a reflective surface. Commonly used reflective materials are specialized speed-measuring reflective tape (adhesive tape), aluminum foil or other reflective materials can also be used as substitutes, and sometimes white paint can be applied to the measurement area to serve as a reflective surface. The emitter and the reflective surface must be properly configured, typically, the distance between them is 5-15M. When the measured shaft rotates, the photoelectric element receives pulsating light, and outputs the corresponding electrical signal to the electronic counter, thereby measuring the rotational speed of the measured shaft. The waveform of the output signal from the photoelectric speed sensor is relatively regular, close to a standard square wave, with almost no interference signals generated. However, for transmissive types, vibration reduces the service life of the light source, so they are not suitable for use in conditions with strong vibration. Reflective types have no mechanical connection with the measured shaft, making them convenient to use.

woehner 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 of which require vehicle speed signals. Therefore, the accuracy and stability of the output signal from the speed sensor will greatly affect these control units. Automotive speed sensors mostly adopt a Hall-effect structure. Hall speed sensors are magnetoelectric sensors based on the Hall effect, featuring high sensitivity to magnetic fields, stable output signals, high frequency response, strong anti-electromagnetic interference capability, simple structure, and ease of use. They mainly consist of permanent magnets with a specific number of pole pairs (generally 4 or 8 pairs), Hall elements, a rotating mechanism, and input/output connectors. Their working principle is that when the sensor's rotating mechanism rotates under external drive, it drives the permanent magnet to rotate, causing periodic changes in the magnetic field passing through the Hall element. This induces changes in the output voltage of the Hall element, which is processed by subsequent circuits to form stable pulse voltage signals as the output of the speed sensor. Key electrical technical parameters for Hall-structure speed sensors include: output signal high voltage, low voltage, duty cycle, period, rise time, fall time, and pulses per period. To ensure product performance and reliability, these parameters must be quantitatively tested before factory shipment. Test systems featuring integration and intelligence, efficient automatic measurement, software calculation, and graphical or tabular display of results are increasingly favored by automotive speed sensor manufacturers. A comprehensive testing device has been developed for performance measurement of commonly used Hall-effect vehicle speed sensors. Considering cost, the high-speed counter port of a microprocessor is used for data acquisition from the vehicle speed sensor, and software control is used to calculate and graphically display the acquired data. The completed testing device offers advantages such as high testing precision, reliable data communication, a user-friendly graphical interface, strong anti-interference capability, simple and intuitive testing process, and low system development cost. It has good market promotion potential, indicating significant application prospects for speed sensors in vehicle speed detection. 2) Speed sensors for belt conveyors use Hall sensors, which are sensors that utilize the Hall effect to achieve magnetoelectric conversion. The Hall effect was discovered in 1879 and has a development history of over 100 years. However, its application gained attention and widespread adoption in the 50s of this century due to the rapid development of microelectronics, leading to the continuous development of various Hall elements. China began increasing research on Hall elements in the 20s of the 70th century. After nearly several decades of research and development, it is now possible to produce Hall elements with various performances, such as standard type, high-sensitivity type, low-temperature-coefficient type, temperature/magnetic-field sensing type, and switch-type Hall elements. Due to the characteristics of Hall sensors, including high sensitivity, good linearity, high stability, small size, and high-temperature resistance, they have been widely used in various industrial fields such as non-electrical quantity measurement and automatic control, computer devices, and modern military technology.

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