German MQ TECH sensor, MQ TECH model, MQ TECH price

MQ TECH sensor is a device capable of sensing the approach of an object. It utilizes the sensitivity of a displacement sensor to approaching objects to detect proximity and output corresponding switching signals; therefore, proximity sensors are also commonly referred to as proximity switches. It is a general term for sensors designed to replace contact-based detection methods such as switches, with the aim of non-contact detection of the target object. It can detect movement and presence information of the object and convert it into electrical signals.

MQ TECH sensor industry applications

Torque sensor is a precision measuring instrument for measuring various torques, rotational speeds, and mechanical power. The scope of application is very wide, 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 for manufacturing viscometers; 6) Can be used in process industry and flow industry; 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 for manufacturing viscometers; 6) Can be used in process industry and flow industry; 7) Can be applied in laboratories, testing departments, as well as production monitoring and quality control;

MQ TECH sensor classification

1) Non-contact torque sensor In a non-contact torque sensor, 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 applied by 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 flux density on the splines. This change in magnetic flux density is converted into a voltage signal via coils. Due to its non-contact operating mode, the non-contact torque sensor offers long service life, high reliability, resistance to wear, lower latency, and reduced sensitivity to shaft deflection and axial offset, making it 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 advancements in technology and wireless transmission, the conductive slip rings and brush arms previously used for outputting signals from contact strain gauge sensors can now be replaced by wireless transmission modules, thereby overcoming wear between slip rings and brush arms and improving measurement accuracy. Magneto-electric torque sensors operate on the principle of magneto-electric conversion, analyzing the phase difference between two electromotive force (EMF) output signals to measure torque. They are mainly categorized into closed magnetic circuit sensors and open magnetic circuit sensors. Fiber optic torque sensors primarily use light reflection and phase difference principles. 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 susceptible to environmental influences and are relatively difficult to install and debug. 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 source changes accordingly, causing a change in the output current of the photoelectric element. Measuring this change allows calculation of the torque value. [3] 2) Strain gauge torque sensor Strain gauge torque measurement employs strain electrical measurement technology. 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 an electrical signal change, thereby achieving torque measurement. The sensor performs the following information conversion: it consists of an elastic shaft, measurement bridge, instrumentation amplifier, and interface circuit. 3) High-performance wireless sensor High-performance wireless torque sensors integrate 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 data and transmits it to the transmission module. Upon receiving the data, the reception module's 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 section, 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 section 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 to achieve wireless transmission. 4) Electronic sensor The electronic torque meter is a portable, high-performance shaft power measuring instrument designed for fan and pump testing and on-site energy efficiency evaluation. Innovatively abandoning the cumbersome, complex, and often impractical installation process of traditional electromechanical torque sensors in many field environments, the electronic torque meter enables real-time measurement of fan and pump motor efficiency. It monitors the operational status of fan and pump motors at various stages during use, providing real-time, authentic, and reliable data for studying their usage conditions, while avoiding impacts 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 real-time efficiency of fan and pump motors, providing a rigorous and scientific evaluation method for energy saving in fan and pump units.

MQ TECH sensor usage precautions

1) During installation, do not operate under power. Do not directly strike or collide with the sensor. 2) Tighten the fastening bolts of the coupling. Install a protective cover on the outside of the coupling to prevent personal injury. 3) The signal line output must not be shorted to ground or to the power supply. 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 routine metrological verification and calibration work, torque sensors are typically calibrated using a torque standard machine. Since torque sensors have high accuracy, usually Class 1 and above, another important factor affecting measurement results in actual practice, besides the uncertainty of the torque standard machine itself, is the quality of the connection between the sensor and the torque standard machine. Especially in the calibration of high-precision torque sensors, when not considering the uncertainty of the torque standard machine itself, the quality of the connection directly affects the accuracy of the measurement result. In existing torque sensor measurement methods, the sensor is usually connected in series with the torque standard machine for calibration, inevitably raising issues regarding the reliability of the connection quality. Previously, to ensure stability and firmness of the connection installation, rigid connection methods were commonly used. This method brings many inconveniences to inspectors during assembly and disassembly. Additionally, due to machining precision and fit gaps of components, significant changes in coaxiality between the measurement shaft systems occur during actual measurement, seriously affecting the accuracy of the results. Although this defect can be reduced using laser alignment devices, influenced by various factors and differences in manual installation skills, coaxiality remains a major uncertainty factor affecting the measurement during the actual loading process of the torque sensor.

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