German HSW sensors, HSW models, HSW prices

HSW sensors, also known as displacement sensors, are a type of sensor used to detect the distance to an object to perform a preset function, and are widely applied. Main products include mobile phone proximity sensors and long-range measurement sensors, applied in smart belts. Proximity sensors can be classified into optical proximity sensors, infrared proximity sensors, ultrasonic proximity sensors, etc., based on their working principles. Most proximity sensors used in mobile phones are infrared proximity sensors, which have an infrared emitting tube and an infrared receiving tube. When the infrared rays emitted by the emitting tube are received by the receiving tube, it indicates that the distance is close, and the screen needs to be turned off to prevent misoperation. When the receiving tube does not receive the infrared rays emitted by the emitting tube, it indicates that the distance is far, and there is no need to turn off the screen. The working principles of other types of proximity sensors are similar; they also judge the distance by the emission and reception of a certain substance, which can be ultrasonic waves, light pulses, etc.

HSW sensor industry applications

A torque sensor is a precision measuring instrument for measuring various torques, rotational speeds, and mechanical power. It has a wide range of applications, mainly used for: 1) Detection of output torque and power of rotating power equipment such as motors, engines, and internal combustion engines; 2) Detection of torque and power of fans, water pumps, gearboxes, and torque wrenches; 3) Detection of torque and power in railway locomotives, automobiles, tractors, aircraft, ships, and mining machinery; 4) Can be used for detection of torque and power in sewage treatment systems; 5) Can be used to manufacture viscometers; 6) Can be used in process industries and flow industries; 7) Can be applied in laboratories, testing departments, as well as production monitoring and quality control. 1) Detection of output torque and power of rotating power equipment such as motors, engines, and internal combustion engines; 2) Detection of torque and power of fans, water pumps, gearboxes, and torque wrenches; 3) Detection of torque and power in railway locomotives, automobiles, tractors, aircraft, ships, and mining machinery; 4) Can be used for detection of torque and power in sewage treatment systems; 5) Can be used to manufacture viscometers; 6) Can be used in process industries and flow industries; 7) Can be applied in laboratories, testing departments, as well as production monitoring and quality control;

HSW sensor classification

1) Non-contact torque sensors In non-contact torque sensors, the input shaft and output shaft are connected by a torsion bar. The input shaft has splines, and the output shaft has keyways. When the torsion bar twists under the torque from the steering wheel, the relative position between the splines on the input shaft and the keyways on the output shaft changes. The change in relative displacement between the splines and keyways equals the twist amount of the torsion bar, causing a change in magnetic induction intensity on the splines. This change in magnetic induction intensity is converted into a voltage signal through coils. Due to their non-contact operation, non-contact torque sensors have long service life, high reliability, are less prone to wear, have smaller delays, and are less affected by shaft deflection and axial offset. They are widely used in the passenger car sector. Common types of non-contact torque sensors include strain gauge, magneto-electric, fiber optic, and photoelectric sensors. Strain gauge non-contact sensors utilize wireless transmission technology. With technological advancements and the development of wireless transmission, the conductive slip rings and brush arms used for output signals in contact strain gauge sensors can now be replaced by wireless transmission modules, overcoming wear between slip rings and brush arms and improving measurement accuracy. Magneto-electric torque sensors use the principle of magneto-electric conversion, analyzing the phase difference of electromotive force signals from two outputs to measure torque. They are mainly divided into closed magnetic circuit sensors and open magnetic circuit sensors. Fiber optic torque sensors mainly use the principles of light reflection and phase difference. They read light signals reflected from two corresponding positions on the shaft and calculate the phase difference to determine the torque value. However, fiber optic sensors are easily affected by the environment, and installation and debugging are relatively difficult. Photoelectric torque sensors use photoelectric sensing elements as core components. When torque is applied to the drive shaft, the intensity of light emitted by the light source changes accordingly, causing a change in the output current of the photoelectric element. The torque value can be calculated by measuring this change. [3] 2) Strain gauge torque sensors Strain gauge sensors use strain electrical measurement technology for torque measurement. Strain gauges are bonded to the elastic shaft to form a measurement bridge. When the elastic shaft undergoes slight deformation due to torque, the resistance of the bridge changes. This change in resistance is converted into a change in electrical signal, thereby achieving torque measurement. The sensor performs the following information conversion; it consists of an elastic shaft, a measurement bridge, an instrumentation amplifier, and an interface circuit. 3) High-performance wireless sensors High-performance wireless torque sensors combine sensors with wireless communication technology to achieve wireless data transmission. The torque electrical signal is amplified and undergoes A/D conversion by a microcontroller-controlled signal processing circuit. An encoder then encodes the collected digital quantity and transmits it to the transmission module for sending. After the receiving module receives the data, a decoder sends the decoded data to the microcontroller, which displays the obtained torque data value via LED. The sensor data acquisition and transmission circuit consists of the torque sensor, signal processing part, microcontroller, and wireless transmission circuit. The torque sensor transmits the strain electrical signal generated by the resistance strain gauge to the signal processing circuit. The signal processing part extracts and amplifies the analog signal from the sensor and performs analog-to-digital conversion. The microprocessor controls the operation of various components in the system and processes the digital signals. Under the control of the microprocessor, the wireless transmission circuit uses an encoder to encode and process the collected information data, which is then transmitted by the emission module, achieving wireless transmission. 4) Electronic sensors An electronic torque meter is a portable, high-performance shaft power measuring instrument designed for fan and pump testing and on-site energy efficiency evaluation. The electronic torque meter creatively eliminates the cumbersome, complex, and often difficult installation process of traditional electromechanical torque sensors in many field environments. It enables real-time measurement of fan and pump motor efficiency, monitors the operating status of fan and pump motors at various stages during use, and provides real-time, authentic, and reliable data for studying the usage status of fan and pump motors. It avoids the impact on test results caused by improper installation of electromechanical torque sensors. The electronic torque meter can completely replace the shaft power measurement function of traditional torque sensors and obtain the real-time efficiency of fan and pump motors, providing a rigorous and scientific evaluation method for energy saving in fan and pump units.

HSW sensor usage precautions

1) During installation, do not operate while energized. Do not directly strike or collide with the sensor. 2) The fastening bolts of the coupling should be tightened, and a protective cover should be added to the outside of the coupling to avoid personal injury. 3) The signal line output must not be grounded or short-circuited to the power supply. The output current must not exceed 10mA. The shield layer of the shielded cable must be connected to the common terminal (power ground) of the +15V power supply. 4) In daily metrological verification and calibration work, torque sensors are usually calibrated using a torque standard machine. Since torque sensors have high accuracy, typically 1 grade and above, another important factor affecting the measurement results of torque sensors in actual measurement work, besides the uncertainty of the torque standard machine itself, is the connection quality between the sensor and the torque standard machine. Especially in the calibration of high-precision torque sensors, when the uncertainty of the torque standard machine itself is not considered, the quality of the connection will directly affect the accuracy of the measurement results. In existing torque sensor measurement methods, sensors are usually connected in series to the torque standard machine for calibration, so the issue of reliable connection quality inevitably arises during the calibration process. In the past, to ensure the stability and firmness of the connection installation, rigid connection methods were usually used for installation. This method brings many inconveniences to inspectors during loading and unloading. Additionally, due to the machining precision of parts and the existence of fit clearances, the coaxiality between the measurement shaft systems changes significantly during actual measurement, seriously affecting the accuracy of the measurement results. Although this defect can be reduced by laser alignment devices, due to various factors and differences in manual installation levels, coaxiality remains a major uncertainty factor in the metrology process during actual loading of torque sensors.

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