German STUDIO DSM sensor, STUDIO DSM model, STUDIO DSM price

STUDIO DSM sensors are devices that measure the operating speed of an object under test and convert it into an output signal. Speed sensors include linear speed sensors and rotational speed sensors. With technological advancements, traditional measurement equipment can no longer meet current demands and is gradually being phased out. Laser speed sensors are now widely used and play a significant role in product manufacturing. By connecting to a computer, they enable automated and intelligent measurement and control of the object under test. This is the product of the combination of modern measurement technology and computer technology.

STUDIO DSM 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 today 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 points in time within an extremely short interval, the distance moved by the object under test is determined. Combined with internal algorithms, the sensor outputs the speed of the object in real time. As shown in the figure: (1) LED light emission port, (2) camera reception port, (3), (4) terminal blocks, (5) mounting screw holes. The (1) LED light emission port emits laser light toward the object under test, which reflects to 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 object has stopped but also its direction of motion. Mount the sensor on a stable bracket to ensure that the rotating object does not generate excessive vibration during rotation, allowing accurate measurement of the rotation angle and speed of the object under test. 2) Radar speed measurement: Traditional speed measurement mostly focuses on rotational and linear motion speeds. However, industrial automation often involves irregular speed measurements, such as athlete speed measurement, traffic vehicle speed measurement, and golf ball speed measurement. Radar speed sensors can meet these requirements.

STUDIO DSM 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 passes through the holes or notches to strike the phototube. When illuminated, the phototube's reverse resistance drops significantly, generating 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, the rotational speed of the shaft under test can be determined based on the number of holes or notches on the disk. 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 rotational speed of the shaft can be read directly. The principle of a reflective speed sensor is similar to that of the transmissive type, converting changes in received light into electrical signals via a phototube. However, it generates pulse signals through light reflection. Typically, reflective material is applied to the measurement area of the shaft under test to create a reflective surface. Common reflective materials include specialized speed-measuring reflective tape (adhesive tape), aluminum foil, or other reflective materials. Sometimes, white paint is applied to the measurement area as a reflective surface. The projector and reflective surface must be properly configured, typically with a distance of 5-15M between them. As the shaft rotates, the photoelectric element receives pulsating light and outputs corresponding electrical signals to the electronic counter, thereby measuring the shaft's rotational speed. The waveform of the output signal from photoelectric speed sensors is relatively regular, close to a standard square wave, with almost no interference signals. However, vibration in transmissive types can reduce the lifespan of the light source, making them unsuitable for environments with strong vibrations. Reflective types have no mechanical connection with the shaft under test and are easy to use.

STUDIO DSM 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 signal from the vehicle speed sensor will greatly affect these control units. Automotive speed sensors often adopt a Hall-effect structure. A Hall speed sensor is a magnetoelectric sensor based on the Hall effect, characterized by high magnetic field sensitivity, 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 as follows: 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 of 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 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 performance measurement of common 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, while software control handles data calculation and graphical display processing. The completed testing device offers advantages such as high testing precision, reliable data communication, a user-friendly graphical interface, strong anti-interference capability, simple and intuitive detection 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. 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 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 Hall elements. Due to characteristics such as high sensitivity, good linearity, high stability, small size, and high-temperature resistance, Hall sensors are widely used in non-electrical quantity measurement, automatic control, computer devices, and modern military technology across various industrial fields.

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