Torque sensor principle of use instructions

First, the scope of application:

The torque sensor is a precision measuring instrument that measures various torques, speeds, and mechanical power. The application range is very wide, mainly 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, pumps, gearboxes, torque wrenches;

3. Detection of torque and power in railway locomotives, automobiles, tractors, aircraft, ships, and mining machinery;

4, can be used to detect the torque and power in the sewage treatment system;

5, can be used to manufacture viscometer;

6, can be used in process industry and process industry.

Second, the basic principle:

Torque measurement: The use of strain gauge electrical measurement technology, the composition of the strain bridge on the elastic shaft, to provide power to the strain bridge can be measured by the elastic shaft torsion of the electrical signal. After the strain signal is amplified, after the pressure/frequency conversion, it becomes a frequency signal that is proportional to the torque. III. Product Features:

1. The signal output can be arbitrarily selected waveform - square wave or pulse wave.

2 high detection accuracy, good stability, strong anti-interference.

3. No need to repeatedly zero; continuous measurement of positive and negative torque.

4. The static torque can be measured, and the dynamic torque can also be measured.

5. The small size and heavy sensor can be used independently from the secondary instrument. Just press the socket pin number to provide +15V, -15V (200mA) power, and then output square wave or pulse wave frequency signal with impedance proportional to torque. Lightweight and easy to install.

6. Measurement range: 0-10000Nm Standard optional, non-standard 20,000 Nm, 30,000 Nm, 50,000 Nm, 80,000 Nm, 100,000 Nm, 150,000 Nm, 200,000 Nm, 500,000 Nm, 1 million Nm, 2 million Nm can be customized, special range customization.

Fourth, the main functions and performance indicators:

Torque indication error: <±0.5%F·S Sensitivity: 1±0.2 mv/V

Nonlinearity: <±0.25% F·S Repeatability: <±0.2% F·S

Return difference: <0.2%F·S Zero float (24 hours): <0.5%F·S

Zero-temperature drift: <0.5%F·S/10°C Output impedance: 1KΩ±3Ω

Insulation Resistance: >500MΩ Static Overload: 120%

Breaking load: 200% Operating temperature: 0～60°C

Storage temperature: -20～70°C Power supply voltage: +15V±5%,-15V±5%

Total current consumption: <130mA Frequency signal output: 5KHz-15KHz

Negative rated torque: 5KHz±10Hz Zero torque: 10KHz±10Hz

Positive rated torque: 15KHz±10Hz Signal duty cycle: (50±10)%

V. Installation and use: Installation steps:

1.According to the connection form of the shaft and the length of the torque sensor, determine the distance between the prime mover and the load, and adjust the distance between the axis of the prime mover and the load relative to the reference plane so that the coaxiality of their axes is less than Φ0.03 mm. Fixed prime mover and load on the datum plane.

2. Mount the couplings on their respective shafts.

3. Adjust the distance between the torque sensor and the reference plane so that its axis is less than Φ0.03 mm from the axis of the prime mover and the load, and the fixed torque sensor is on the reference plane.

4. Fasten the coupling and complete the installation.

Six, signal output and signal acquisition:

1, the basic form of torque signal output:

• Square wave signal, pulse signal.

• Voltage analog signal output or current analog signal output (unidirectional, static torque measurement) can be made according to user needs.

2, torque signal processing form:

• The frequency signal output from the torque sensor is sent to the frequency meter or digital meter, and the frequency signal or voltage and current signals proportional to the torque are directly read.

• The torque and frequency signals of the torque sensor are sent to the secondary device of the SCM, which directly displays the real-time torque value, speed and output power value and RS232 communication signal.

• Directly send torque and speed frequency signals to a computer or PLD for processing.

VII. Maintenance and Maintenance:

1. Grease the bearing at both ends of the torque sensor every other year. When adding grease, open only the bearing caps at both ends, add grease to the bearings, and attach the caps on both ends.

2. Should be stored in a dry, non-corrosive, room temperature of -20 °C - 70 °C environment.

Eight, matters needing attention:

1. When installing, do not operate with electricity. Don't knock or bump the sensor directly.

2. The fastening bolts of the coupling should be tightened. The outside of the coupling should be equipped with a protective cover to avoid personal injury.

3. The signal line output must not be earthed, and the power supply must be short-circuited. The output current should not exceed 10 mA. • The shield of the shielded cable must be connected to the common terminal (power ground) of the +15 V power supply.

Nine, install and use:

1. Use environment: The torque sensor should be installed in an environment where the ambient temperature is 0°C to 60°C, relative humidity is less than 90%, and there is no flammable or explosive product. Should not be installed in a strong electromagnetic interference environment.

(1) Horizontal installation (2) Vertical installation 3. Connection method: Connection between torque sensor, power equipment and load equipment (1) Connection of elastic pin coupling As shown in the figure, this connection method is simple in structure and processing. Easy and easy to maintain. It can compensate the relative displacement of the shaft caused by installation errors in a slight amount, and it can also play a minor role in vibration reduction. Suitable for medium-load, high-speed operation with frequent start-ups. Operating temperature is -20-70°C.

2) Rigid Couplings As shown in the figure, this type of connection is simple in structure, low in cost, non-compensating, non-buffering and vibration-reducing, and has high installation accuracy for both shafts. For very low vibration conditions.

4, installation requirements:

(1) The torque sensor can be installed horizontally or vertically.

(2) As shown in Figures 11 and 12, the power equipment, sensors, and load equipment should be installed on a stable foundation to avoid excessive vibrations. Otherwise, data instability, measurement accuracy, or even sensor damage may occur.

(3) Use a flexible pin coupling or a rigid coupling.

(4) The concentricity of the axes of power equipment, sensors, and load equipment should be less than Φ0.05mm.