WYDC series of high-precision displacement sensor 
 Torque sensor www.niujucgq.com 

 A differential transformer type displacement sensor works: 

 Differential transformer is converted to linear displacement sensor analog voltage. Of its construction as a whole structure, so the durability and environmental resistance are excellent, using the temperature range -20 ℃ to 120 ℃. The differential transformer by the primary coil, secondary coil and the movable core, plus a certain voltage in a coil, the frequency of the sine wave excitation. The movable core to the secondary coil, inducing a voltage, the output characteristics of the differential output of the two secondary coils, with the excitation signal frequency AC voltage, the displacement voltage detector circuits transform the DC output. The detector circuit consists of a rectifier diode and RC filter, the measurement range is movable core mobile tour, generally amounting to + mm ~ hundreds of mm. The movable core in the center position, the output voltage is 0V: when you move around a moving distance is proportional to the positive and negative voltage. Linear less than 1% detection accuracy of a few μ m; error increases when exceeding the prescribed itinerary. 

 2, uses and characteristics: 
 Differential transformer displacement sensor has a good adaptability to environment, widely used to measure pre become the displacement of various physical quantities and can be converted into mechanical displacement (such as tension, pressure, vibration, level, etc.) the measurement . Sensor amplification circuit microelectronic technology, the overall package in a stainless steel shell. Input voltage 12VDC to 24VDC, the output signal of ± 5V, 0 ~~ 5V, 0 to 10V or 0 ~~ 10mA, 04 ~~ 20mA signal, with four half meter used in conjunction. Use as long as the sensor shell clamping in the frame of reference, the measured peak of the staff (or clamping) on ??the measured points can be measured directly between objects relative. Is characterized by: ① no activity contacts, high reliability, long life; ② high resolution, good sensitivity; ③ high linearity and good repeatability; ④ measuring range is wide (measuring range, low resolution); ⑤ The input, zero output voltage, caused by measurement error; higher ⑥ on the frequency and amplitude of the excitation power stability, does not apply to high-frequency dynamic measurements. 

 Note: 

 1, the circuit, although using the internal power supply protection measures, or the user to check and then power. Do not exceed the rated voltage value, so as not to affect the accuracy of the measurement and unnecessary losses. 

 2, the sensor installation location not near a strong magnetic field, if no special instructions, the sensor can not be in a strong metal corrosion. 

 3, the measured point of the trajectory of the best parallel to the axis of the measuring rod of the sensor. Such measurements is the amount of movement, such as the contact surface of the sensor probe to move the probe and analyte should not be uneven. 

 Installed sensor light light up, to avoid knock and drop, the fixture should be fixed at both ends of the sensor, do not use too much force, but not so that the shell appeared to sag, deformation of measuring range, do not over-range use. 

 5, set the sensor is powered warm up for 5 minutes, then an official measurement of use. 

 6, displacement sensors for precision instruments, before leaving the factory after a calibration with aging, the user can not disassemble, or affect the measurement accuracy and may cause sensor damage.