German FLLI BAESSO sensors, FLLI BAESSO models, FLLI BAESSO prices

FLLI BAESSO 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, rotary torque sensors, etc. Torque sensors detect the twisting 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 used in manufacturing viscometers, electric (pneumatic, hydraulic) torque wrenches. They offer advantages such as high precision, fast frequency response, good reliability, and long service life.

FLLI BAESSO sensor classification

1) Laser speed measurement: With the rise of modern precision manufacturing and the need for cost savings, non-contact speed sensors are gradually replacing 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 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, which reflects to 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 not only detects whether the object has stopped but also identifies 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, in industrial automation, there are many irregular speed measurements, such as athlete speed measurement, traffic vehicle speed measurement, and golf ball speed measurement. Radar speed sensors can meet these requirements.

FLLI BAESSO sensor principle

Transmissive speed sensors consist 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, resulting in no output signal. 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 each revolution of the shaft generates 60 pulse signals from the photoelectric converter. If the time base signal of the electronic counter is set to 1s, the shaft speed can be read directly. The principle of reflective speed sensors is similar to transmissive ones, converting light changes into electrical signals via a phototube, but they obtain 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 (adhesive tape), aluminum foil, or white paint applied to the measurement area. The projector and reflective surface must be properly aligned, typically maintaining a distance of 5-15M. As the shaft rotates, the photoelectric element receives pulsed light and outputs corresponding electrical signals to the electronic counter, thereby measuring the shaft speed. Photoelectric speed sensors produce relatively regular waveforms, close to standard square waves, with almost no interference. However, vibration can reduce the lifespan of the light source in transmissive sensors, making them unsuitable for high-vibration environments. Reflective sensors have no mechanical connection with the shaft, offering ease of use.

FLLI BAESSO 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 adopt Hall-effect structures. Hall speed sensors are magnetoelectric sensors 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. They mainly consist of permanent magnets with specific pole pairs (typically 4 or 8 pairs), Hall elements, rotating mechanisms, and input/output connectors. Their working principle involves the rotation of the permanent magnet driven by the sensor's rotating mechanism, 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 shipment. Integrated, intelligent, efficient automated measurement, software calculation, and graphical or tabular display test systems 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, microprocessor high-speed counter ports are used for data acquisition from the speed sensor, with software control enabling data calculation and graphical display processing. The completed testing device offers advantages such as high testing precision, reliable data communication, user-friendly graphical interfaces, 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) Belt conveyor speed sensors use Hall sensors, which utilize the Hall effect for magnetoelectric conversion. Since its discovery in 1879, the Hall effect has over 100 years of development history. However, its application gained attention and widespread adoption in the 50s due to rapid advancements in microelectronics, leading to the continuous development of various Hall elements. China began increasing research on Hall elements in the 20th century 70s. After decades of research and development, various types of Hall elements can now be produced, including standard, high-sensitivity, low-temperature-coefficient, temperature/magnetic-field-measuring, and switching Hall elements. Due to their high sensitivity, good linearity, high stability, compact size, and high-temperature resistance, Hall sensors are widely used in non-electrical measurement automatic control, computer devices, and modern military technology across various industrial fields.

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