German PRIORCLAVE LIMITED sensors, PRIORCLAVE LIMITED models, PRIORCLAVE LIMITED prices

PRIORCLAVE LIMITED sensors are the direct source of information for the entire machine vision system. They mainly consist of one or two image sensors, sometimes accompanied by light projectors and other auxiliary equipment. The main function of a vision sensor is to acquire the raw images that the machine vision system needs to process. Image sensors can use laser scanners, line-scan and area-scan CCD cameras, or TV cameras, as well as newly emerging digital cameras.

PRIORCLAVE LIMITED 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 high-precision and most commonly used 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 LED light sources, and one high-speed imaging port that achieves CCD area high-speed imaging comparison. By comparing images at two points in time within an extremely short period, it determines the distance the object has moved. 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 directs laser light at the measured object; after reflection, it reaches the (2) camera reception port. Upon receiving the signal, it is transmitted to the signal processor, which calculates the speed using algorithms. The ZLS-Px aberration speed sensor can simultaneously measure speed and length in two directions. It can detect not only whether the measured object has stopped but also its direction of motion. Mount the sensor on a stable bracket to ensure that the rotation of the object does not generate excessive vibration, allowing measurement of the rotational angle and speed of the rotating object. 2) Radar speed measurement: Traditional speed measurement mostly involves rotary motion speed and linear motion speed. However, industrial automation often requires irregular speed measurements, such as athlete speed, traffic vehicle speed, and golf ball speed. Radar speed sensors can meet these requirements.

PRIORCLAVE LIMITED 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 sixty, therefore, for each revolution of the shaft under test, 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 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 lifespan 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.

PRIORCLAVE LIMITED sensor industry applications

1) Modern cars 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 sensors will greatly affect these control units. Automotive speed sensors mostly adopt a Hall-effect structure. A Hall speed sensor is a magneto-electric sensor based on the Hall effect, characterized by high magnetic field sensitivity, stable output signals, 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 is driven externally, it rotates the permanent magnet, 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 pulses per period. 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 results are increasingly favored by automotive speed sensor manufacturers. A comprehensive testing device has been developed for measuring the performance of common 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 collected data. The completed testing device offers advantages such as high test accuracy, reliable data communication, a user-friendly graphical interface, strong anti-interference capability, simple and intuitive testing processes, and low system development costs. 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 utilize the Hall effect to achieve magneto-electric 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 measurement type, and switch type. Due to the characteristics of Hall sensors, such as high sensitivity, good linearity, high stability, small size, and high temperature resistance, they are widely used in various industrial fields, including non-electrical quantity measurement, automatic control, computer devices, and modern military technology.

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