German Rotronic sensors, Rotronic models, Rotronic prices

Rotronic sensors, also known as torque sensors, torsion sensors, torque meters, are divided into two main categories: dynamic and static. Dynamic torque sensors are also referred to as torque sensors, torque-speed sensors, non-contact torque sensors, and rotary torque sensors. Torque sensors detect the twisting moment on various rotating or non-rotating mechanical components. They convert the physical changes in torque into precise electrical signals. Torque sensors can be used in the manufacture of viscometers and electric (pneumatic, hydraulic) torque wrenches. They offer advantages such as high precision, fast frequency response, good reliability, and long service life.

Rotronic sensor classification

1) Laser speed measurement: With the rise of precision manufacturing and the need for cost savings, non-contact speed sensors are gradually replacing contact speed sensors. The most common and high-precision 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 imaging port that achieves CCD area high-speed imaging comparison. By comparing images at two instants within an extremely short time, it determines the distance the object has moved. Combined with internal algorithms, it 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. The (1) LED light emission port directs laser light at the target object; after reflection, it reaches the (2) camera reception port. Upon receiving the signal, it is sent 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 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 cause excessive vibration, allowing accurate measurement of the rotational angle and speed of the 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.

Rotronic 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 measured shaft, light passes through the holes or notches to illuminate the phototube. When illuminated, the phototube's reverse resistance drops significantly, outputting an electrical pulse signal. When the disk blocks the light source, the phototube's reverse resistance becomes very high, and no signal is output. Thus, based on the number of holes or notches on the disk, the rotational speed of the shaft can be determined. The usual number of disk holes or notches is unclear in the source, so the photoelectric converter outputs 60 pulse signals per revolution of the shaft. If the time base signal of the electronic counter is set to 1s, the shaft speed can be read directly. The principle of a reflective speed sensor is similar to that of the transmissive type, converting light changes into electrical signals via a phototube, but it obtains pulse signals through light reflection. Typically, reflective material is applied to the measurement area of the shaft to create a reflective surface. Common reflective materials include specialized speed-measuring reflective tape; aluminum foil or other reflective materials can also be used. Sometimes, white paint is applied to the measurement area as a reflective surface. The projector and reflective surface must be properly aligned, typically with a distance of 5-15M between them. As the shaft rotates, the photoelectric element receives pulsed light and outputs corresponding electrical signals to the electronic counter, thereby measuring the shaft speed. The output waveform of photoelectric speed sensors is relatively regular, close to a standard square wave, with almost no interference signals. However, vibration can reduce the lifespan of the light source in transmissive types, making them unsuitable for high-vibration environments. Reflective types have no mechanical connection with the measured shaft, making them convenient to use.

Rotronic 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 sensors greatly impact these control units. Automotive speed sensors often use Hall-effect structures. A Hall speed sensor is a magneto-electric sensor based on the Hall effect, featuring high magnetic 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 (typically 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 induces voltage changes in the Hall element, which are 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 high/low output voltage, duty cycle, period, rise time, fall time, and pulses per cycle. To ensure product performance and reliability, these parameters must be quantitatively tested before factory release. 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 cost, the high-speed counter port of a microprocessor is used for data acquisition from the speed sensor, while software controls the calculation and graphical display of 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 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 for magneto-electric conversion. The Hall effect was discovered in 1879 and has over 100 years of development history. 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 70 century. After decades of research and development, it can now produce Hall elements with various performances, such as standard, high-sensitivity, low-temperature-coefficient, temperature/magnetic-field-measuring, and switching types. Due to their high sensitivity, good linearity, high stability, small size, and high-temperature resistance, Hall sensors are widely used in industrial fields such as non-electrical quantity measurement, automatic control, computer devices, and modern military technology.

Weidou Intelligent Technology specializes in selling German Rotronic sensors, Rotronic proximity sensors, Rotronic distance sensors, Rotronic vision sensors, Rotronic displacement sensors, Rotronic torque sensors, Rotronic speed sensors, Rotronic photoelectric sensors, Rotronic position sensors, Rotronic angle sensors, Rotronic tactile sensors, Rotronic temperature sensors, Rotronic pressure sensors, Rotronic flow sensors, Rotronic level sensors, Rotronic motion sensors, and Rotronic process sensors. All products are original imports from Germany. Customers are welcome to inquire and place orders.