German VENTECH sensors, VENTECH models, VENTECH prices

VENTECH sensors, also known as displacement sensors, are a type of sensor used to detect the distance to an object to perform a preset function, and have achieved widespread adoption. Main products include mobile phone proximity sensors and long-distance measurement sensors, applied in smart belts. Distance sensors can be classified into optical distance sensors, infrared distance sensors, ultrasonic distance sensors, and others based on their working principles. Most distance sensors used in mobile phones are infrared distance sensors, which feature an infrared emitting tube and an infrared receiving tube. When the infrared light emitted by the transmitting tube is received by the receiving tube, it indicates a short distance, requiring the screen to be turned off to prevent accidental operation. When the receiving tube does not receive the infrared light emitted by the transmitting tube, it indicates a long distance, and there is no need to turn off the screen. The working principles of other types of distance sensors are similar; they determine distance by emitting and receiving a certain substance, such as ultrasonic waves or light pulses.

VENTECH Sensor Classification

1) Laser speed measurement: With the rise of precision manufacturing and the demand for cost savings, non-contact speed sensors are gradually replacing contact speed sensors. Currently, the most common non-contact laser speed sensor with high precision on the market is the ZLS-Px aberration speed sensor. The aberration speed sensor has two ports: one transmitting port, emitting LED light source; one high-speed imaging port, achieving CCD area high-speed imaging comparison, by comparing images at two instants within an extremely short time, determining the distance the measured object has moved, combined with the algorithm inside the sensor, real-time output of the measured object's speed. As shown in the figure, (1)LED light emission port, (2) camera reception port, (3), (4) terminal blocks, (5) mounting screw holes. (1)LED light emission port emits laser towards the measured object, reflected to (2) camera reception port, after receiving the signal, it is transmitted to the signal processor, calculating its speed through algorithms. The ZLS-Px aberration speed sensor can simultaneously measure speed and length in two directions, not only detecting whether the measured object has stopped, but also detecting the direction of movement of the measured object. Mount the sensor on a stable bracket, Ensure that the rotation of the rotating object does not generate excessive vibration, thereby enabling measurement of the rotation angle and rotational speed of the rotating test object. 2) Radar speed measurement: Traditional speed measurement mostly involves rotary motion speed measurement and linear motion speed measurement, but in real-world industrial automation, there are many non-regular speed measurements, such as athlete motion speed measurement, traffic vehicle speed measurement, golf ball speed measurement, and other scenarios; radar speed sensors can meet these requirements.

VENTECH Sensor Principle

A transmissive speed sensor consists of a slotted or apertured disk, a light source, and a phototube. When the disk rotates with the measured shaft, light can only reach the phototube through the holes or slots. 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 no signal is output at the output terminal. In this way, based on the number of holes or slots on the disk, the rotational speed of the measured shaft can be determined. The number of holes or slots on the disk is typically set to one, so that for each revolution of the measured shaft, the photoelectric converter outputs 60 pulse signals. If the time base signal of the electronic counter is set to 1s, The rotational speed of the measured shaft can then be read directly. The operating principle of reflective speed sensors is the same as that of transmissive types, converting 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 measured shaft to form a reflective surface. Commonly used reflective materials include dedicated speed-measurement reflective paper tape (adhesive tape), aluminum foil or other reflective materials may also be used as substitutes, and sometimes white paint can be applied to the measured area to serve as a reflective surface. The emitter and the reflective surface must be properly aligned, with a typical distance of 5-15M between them. When the measured shaft rotates, the photoelectric element receives pulsating light, and outputs corresponding electrical signals to an electronic counter, thereby measuring the rotational speed of the measured shaft. The waveform of the output signal from photoelectric speed sensors is relatively regular, close to a standard square wave, with virtually no interference signals generated. However, vibration in transmissive types reduces the service life of the light source, making them unsuitable for use in conditions with strong vibration. Reflective types have no mechanical connection with the measured shaft, making them convenient to use.

VENTECH 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 signals from speed measurement sensors 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, rotating mechanisms, 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 causes 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 number of pulses per cycle. To ensure product performance 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 test 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 costs, 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 accuracy, 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, so speed sensors will have huge application prospects 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, but 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 70 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 and magnetic 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 automatic control, computer devices, and modern military technology.

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