German TECNOCRYO sensors, TECNOCRYO models, TECNOCRYO prices

TECNOCRYO sensors, also known as torque sensors, torsion sensors, torque meters, are divided into two main categories: dynamic and static. Among them, dynamic torque sensors are also called torque sensors, torque-speed sensors, non-contact torque sensors, rotating torque sensors, etc. Torque sensors detect the perception of torsional moment on various rotating or non-rotating mechanical components. Torque sensors convert the physical changes of torque into precise electrical signals. Torque sensors can be applied in the manufacture of viscometers, electric (pneumatic, hydraulic) torque wrenches, and have advantages such as high precision, fast frequency response, good reliability, and long service life.

TECNOCRYO sensor classification

1) Laser speed measurement: With the rise of modern precision manufacturing and the demand for cost savings, non-contact speed sensors will gradually replace contact speed sensors. Currently, the most accurate and 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 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, it determines the distance the measured object has moved, and combined with internal algorithms, it outputs the speed of the measured object 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 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. The ZLS-Px aberration speed sensor can simultaneously measure speed and length in two directions. It can not only detect whether the measured body has stopped, but also detect the direction of movement of the measured body. Fix the sensor on a stable bracket to ensure that the rotation process of the rotating object does not produce excessive vibration, thereby allowing the measurement of the rotation angle and speed of the rotating measured body. 2) Radar speed measurement: Traditional speed measurement mostly involves rotational 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, golf ball speed measurement, etc. Radar speed sensors can meet these requirements.

TECNOCRYO 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 there is no signal output at 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 perceived 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), or aluminum foil and other reflective materials can be used instead. Sometimes white paint can be applied to the measured area as a reflective surface. The projector and the reflective surface need to 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, for transmissive types, vibration can reduce the lifespan of the light source, so 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.

TECNOCRYO 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 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, characterized by 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, which causes changes in the output voltage of the Hall element. Subsequent circuit processing forms stable pulse voltage signals as the output of the speed sensor. The main electrical technical parameters of Hall-structure speed sensors include: output signal high voltage, low voltage, duty cycle, period, rise time, fall time, number of pulses per period, 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 detection 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 calculate and graphically display the collected data. The completed detection device has advantages such as high testing precision, reliable data communication, a user-friendly graphical interface, strong anti-interference capability, simple and intuitive detection process, and low system development cost. It has a good market for widespread adoption, so speed sensors will have huge application prospects in vehicle speed detection. 2) Speed sensors for belt conveyors adopt 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 more than 100 years, but its application gained attention and widespread use in the 50s of this century due to the rapid development of microelectronics, leading to the continuous development of various Hall elements. China began to increase 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 ordinary type, high sensitivity type, low temperature coefficient type, temperature/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.

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