http://www.elec-intro.com/index.php en-US http://www.elec-intro.com/Sensor-Principle-working/ Tiny <admin@yourname.com> Wed, 11 Feb 2009 04:55:28 +0000 http://www.elec-intro.com/Sensor-Principle-working/ in a special section of the flexible shaft paste on a dedicated on-chip test should be twisted and changed composition of the bridge, which is the basis of torque sensors; in a fixed axis: (1) energy ring secondary coil transformers, (2) Ring the primary signal transformer coil, (3) axis of printed circuit boards, circuit board that contains a stable power supply rectifier, instrument amplifier, V / F transform circuit and signal output circuit. In the case of the sensor on a fixed:


(1) excitation circuit, (2) of primary energy ring transformer coil (input), (3) ring signal transformer secondary coil (output), (4) signal processing circuit
five working process
sensors to provide ± 15V power supply, excitation of circuits have a crystal oscillator of the 400Hz square wave, the TDA2030 amplifier that is generated through the exchange of excitation power supply through the ring of energy from the transformer T1 still the primary coil to transmit the rotating secondary coil , To be the axis through the AC power rectifier circuit filter to be ± 5V DC power supply, the power to do the work of the AD822 op amp power supply; power base by the AD589 and AD822 dual operational amplifier composed of high-precision ± 4.5V have Regulated Power Supply The precision DC power supply, the power not only as a bridge power amplifier and also as the V / F converter power work. When the flexible shaft torsion, the strain has been detected Bridge mV response signal level through the instrument amplifier AD620 zoom into 1.5v ± 1v strong signal, and then through the V / F converter LM131 converted into frequency signal through the ring signal transformer T2 From the rotating primary coil to transmit static secondary coil, and then after a shell on the sensor signal processing circuit filter, plastic and flexible bearings can be affected by the torque is directly proportional to the frequency signal, the signal for the TTL level, can Second dedicated to the instrument or frequency display can also be sent directly to computer processing. As the rotating transformer action - only between the static ring against a few millimeters of space, plus part of the axis sensors are sealed in metal, to form an effective shield, it has a strong anti-interference capability.
of the sensor output signals in the frequency of 0:00 am to 10kHz. Toward full-scale rotating at 15KHz. Reverse rotation for full-scale 5KHz. That is, full-scale variable number of 5,000 / per second. Speed measurement using magnetic or optical gear gear measurement, rotating axis each week can have a 60 pulse, high-speed or medium-speed sampling frequency can be used when the method, low-speed sampling can be used when testing cycle. The sensor accuracy of ± 0.2% ~ ± 0.5% (F S). Since the sensor output signal frequency, so there is no AD conversion can be directly sent to computer data processing.







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