German GESA TERMOMETROS sensors, GESA TERMOMETROS models, GESA TERMOMETROS prices

GESA TERMOMETROS sensors are the direct source of information for the entire machine vision system, mainly consisting of one or two image sensors, sometimes accompanied by light projectors and other auxiliary equipment. The main function of vision sensors is to acquire sufficient raw images for the machine vision system 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.

GESA TERMOMETROS sensor classification

1) Laser speed measurement: With the rise of precision manufacturing and the need to save costs, non-contact speed sensors will gradually replace contact speed sensors. Currently, the non-contact laser speed sensors with higher accuracy and most commonly used on the market are ZLS-Px aberration speed sensors. Aberration speed sensors have two ports: one emission port that emits LED light sources; 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 moved by the measured object is determined, and combined with internal algorithms of the sensor, the speed of the measured 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 mounting screw holes. The (1) LED light emission port emits laser towards the measured object, which reflects to the (2) camera reception port. After receiving the signal, it is transmitted to the signal processor, which calculates its speed through algorithms. ZLS-Px aberration speed sensors can simultaneously measure speed and length in two directions. They can not only detect whether the measured object has stopped but also detect the direction of movement of the measured object. Mount the sensor on a stable bracket to ensure that the rotating object does not produce excessive vibration during rotation, thereby allowing measurement of the rotation angle and rotational speed of the rotating measured object. 2) Radar speed measurement: Traditional speed measurements mostly involve rotary motion speed measurement and linear motion speed measurement. However, there are many irregular speed measurements in industrial automation, such as athlete motion speed measurement, traffic vehicle speed measurement, and golf ball speed measurement. Radar speed sensors can meet these requirements.

GESA TERMOMETROS sensor principle

Transmissive speed sensors consist of a disk with holes or notches, a light source, and a phototube. When the disk rotates with the measured shaft, 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 no signal is output from the output terminal. Thus, based on the number of holes or notches on the disk, the rotational speed of the measured shaft can be determined. The usual number of disk holes or notches is unclear in the source, so when the measured shaft completes one revolution, the photoelectric converter outputs 60 pulse signals. If the time base signal of the electronic counter is taken as 1s, the rotational speed of the measured shaft can be read directly. The principle of reflective speed sensors is the same as that of transmissive sensors; they convert changes in sensed light into changes in electrical signals via a phototube, but they obtain pulse signals through light reflection. Typically, reflective material is adhered to the measurement area of the measured shaft to form a reflective surface. Commonly used reflective materials include special speed-measuring reflective paper tape (adhesive tape); aluminum foil and other reflective materials can also be used as substitutes. Sometimes, white paint can be applied to the measured area to serve as a reflective surface. The projector 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 corresponding electrical signals to the 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 almost no interference signals generated. However, since vibration reduces the lifespan of the light source in transmissive types, they are not suitable for use under conditions of strong vibration. Reflective types have no mechanical connection with the measured shaft and are convenient to use.

GESA TERMOMETROS 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 magneto-electric sensor based on the Hall effect. It features 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 magnets 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. Subsequent circuit processing forms a stable pulse voltage signal, which serves as the output signal of the vehicle speed sensor. The main electrical technical parameters of Hall-effect speed sensors include: high-level output voltage, low-level output 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 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. It is a comprehensive testing device 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. Software control is used to calculate the acquired data and process it for graphical display. The completed testing device offers advantages such as high testing accuracy, reliable data communication, a user-friendly graphical interface, strong anti-interference capability, a simple and intuitive testing process, and low system development cost. It has 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 its discovery 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 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 automatic control for non-electrical quantity measurement, computer devices, and modern military technology.

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