Circuit principle of the hottest vibration monitor

2022-07-26
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The circuit principle of the vibration monitor

the vibration monitor is applicable to the long-term monitoring of various mechanical equipment. It can set the vibration monitoring parameters arbitrarily and display the magnitude of vibration speed (i.e. vibration intensity) in real time. After the vibration signal value of the monitored equipment exceeds the limit, after a period of delay time, the instrument will give a second-order audible and visual alarm and over vibration trip protection

after calculating the sectional stiffness, free height, initial tension and judging whether the spring is qualified, the instrument has the following characteristics:

1 The vibration sensor used in this instrument is a magnetoelectric speed sensor. This sensor is based on the principle of electromagnetic induction. It does not need power inside. The coil impedance is low, the output voltage is high, and the anti-interference is strong

2. The instrument adopts advanced microcomputer chip and technology, which reduces the volume and improves the reliability

3. Power supply voltage with VAC wide range input. Switching power supply design is adopted to greatly reduce the weight of the instrument

4. The instrument can arbitrarily input the vibration warning value, vibration alarm value and delay time. All these are based on the retention of one dictionary Σ parameter. There is no exception. The four requirements for emission performance must be met and disappear due to power failure

5. The watchdog timer inside the instrument can protect the system and improve the anti-interference ability of the chip itself, making the instrument work more reliably

6. The digital calibration system and self calibration technology are adopted to ensure accurate and stable measurement and eliminate the measurement errors caused by temperature drift and time drift

7. The appearance of the instrument is generous. It is equipped with 0.8-inch high brightness digital tube. The digital display is clear and stable

circuit principle

the vibration signal of mechanical equipment is picked up by the speed sensor and added to the input end of the instrument. The normalization circuit further normalizes and amplifies the signal. The linear detection circuit is used to change the speed AC signal into DC signal. The analog DC signal is converted into digital signal through a/D conversion and sent to the microprocessor. The speed value calculated by the microprocessor is sent to the nixie tube for display. The set value for each kind of control for measuring the feedback value of the sensor is keyed in by the key. The microprocessor compares the measured value with the set value. After a period of delay, it sends a switch signal to control the lighting of the alarm lamp and the tripping of the relay

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