Principle And Process Sensor

Flexible shaft in a special paste on a dedicated test chip and the composition should

be changed twisted bridge, called the baseline torque sensor; the axis fixed with: (1) energy toroidal transformer of the secondary coil, (2) signal toroidal transformer primary coil, (3) axis of the printed circuit board, circuit board contains the rectifier stable power supply, instrumentation amplifier, V / F converter and the signal output circuit. In the sensor casing fixed with: (1) excitation circuit, (2) energy toroidal transformer primary winding (input), (3) signal toroidal transformer secondary coil (output), (4) signal processing circuit 5 to the working process sensor provides 15V power supply, excitation circuit crystal oscillator 400Hz square wave, after a TDA2030 power amplifier that produces AC excitation power supply, energy toroidal transformer T1 through the primary coil from the static transfer to the rotating secondary coil, obtained AC power through the axis of the rectifier filter circuit to 5V of DC power, the power to do the work of the power operational amplifier AD822; from the baseline power AD589 and AD822 dual op amp precision power supply generated composed of precision DC power supply 4.5V The power both as a bridge power supply, but also as amplifiers and V / F converter of the power supply. When the flexible shaft torsion, the strain detected by the mV-level bridge strain signal amplified by instrumentation amplifier AD620 as 1.5v 1v strong signal, then through the V / F converter LM131 converted into frequency signals, through signal transformer T2 ring transfer from the rotating primary coil to the stationary secondary coil, then through the sensor housing on the signal processing circuit filtering, and flexible plastic bearings can be obtained by the torque is proportional to the frequency signal, the signal is TTL level, can provide to private secondary instrument or frequency counter display can also be directly sent to computer processing. As the rotating transformer dynamic - static ring a few millimeters of space between the only 0:00, plus the sensor shaft parts in sealed within the metal shell to form an effective shield, it has a strong anti-interference ability. The frequency of the sensor output signal when the zero 10kHz. Positive full scale when rotating 15KHz. Counter-rotating full scale when 5KHz. That the number of full-scale variables 5000 / per second. Gear speed measurement using optical or magnetic measurement gear, shaft rotation per week, can produce 60 pulse, high-speed or medium-speed sampling frequency measurement method can be used, low-speed sampling cycle can be measured using the method. The sensor accuracy up to 0.2% ~ 0.5% (F? S). As the sensor output frequency signal, so there is no AD conversion can be directly sent to the computer data processing. Sensors structure; in a specially designed flexible shaft torsional paste should be measured on a dedicated chip and change the composition of the bridge, shall be the basis of torque sensors; the axis fixed with: (1) energy toroidal transformer of the secondary coil, (2 ) signal toroidal transformer primary coil, (3) axis of the printed circuit board, circuit board contains the rectifier stable power supply, instrumentation amplifier, V / F converter and the signal output circuit. In the sensor casing fixed with: (1) excitation circuit, (2) energy toroidal transformer primary winding (input) (3) signal toroidal transformer secondary coil (output) (4) signal processing circuit 5 to the sensor to provide the working process 15V power supply, excitation circuit crystal oscillator 400Hz square wave, after a TDA2030 power amplifier that produces AC excitation power supply, energy toroidal transformer T1 through the primary coil from the static transfer to the rotating secondary coil, by the AC power through the axis of the rectifier filter circuit to 5V of DC power, the power to do the work of the power operational amplifier AD822; from the baseline power AD589 and AD822 dual op amp precision power supply consisting of precision production 4.5V DC power supply, the power both as a bridge power supply, but also as the amplifier and V / F converter, the power supply. When the flexible shaft torsion, the strain detected by the mV-level bridge strain signal amplified by instrumentation amplifier AD620 as 1.5v 1v strong signal, then through the V / F converter LM131 converted into frequency signals, through signal transformer T2 ring transfer from the rotating primary coil to the stationary secondary coil, then through the sensor housing on the signal processing circuit filtering, and flexible plastic bearings can be obtained by the torque is proportional to the frequency signal, the signal is TTL level, can provide to private secondary instrument or frequency counter display can also be directly sent to computer processing.

Principle And Process Sensor

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