TR1C Torque and Speed Collector
The TR-1C torque and speed collection instrument uses a magnetoelectric phase difference type torque sensor as a detection element, and can collect the torque, speed and power of a transmission machine. The instrument displays the acquisition results with a digital tube and is equipped with an RS232 (or custom half-duplex RS485) standard serial interface, which can communicate with a computer or interface with a micro printer. The instrument can be optionally equipped with a torque and speed alarm output unit.
1. Technical indicators
1. Sampling cycle: 0.1 second, 1 second, 2 seconds, 4 seconds.
2. Torque collection range: 0 ~ 50000Nm
3. Speed collection range (120 for the torque sensor and 60 for the external speed sensor):
The sampling period is 0.1 seconds:
① Torque sensor speed measurement: The collection range is 14 ~ 50000r / min.
② Speed measurement by external speed sensor: The collection range is 28 ~ 10000r / min.
The sampling period is 1 second:
① Speed measurement by torque sensor: The collection range is 3.5 ~ 27000r / min.
② Speed measurement by external speed sensor: The collection range is 7 ~ 10000r / min.
The sampling period is 2 seconds:
① Torque sensor speed measurement: The collection range is 2.3 ~ 12000r / min.
② Speed measurement by external speed sensor: The collection range is 4.6 ~ 10000r / min.
The sampling period is 4 seconds:
① Torque sensor speed measurement: The collection range is 1.2 ~ 6000r / min.
② Speed measurement by external speed sensor: The collection range is 2.3 ~ 10000r / min.
4. Torque collection error: less than 0.1%
5. Speed collection error: less than 0.1%
6. Torque and speed analog output error: less than 0.5%
Torque analog (no reverse): 0 ~ 10V output, 0V corresponds to 0Nm, and 10V corresponds to full range of forward and reverse.
Torque analog (with reverse): 0 ~ 10V output, 0Nm corresponds to 5V output; forward full-scale output 10V; reverse full-scale output 0V.
Speed analog quantity: 0 ~ 10V output, 0V corresponds to 0r / min, 10V corresponds to forward and reverse full scale.
Output impedance: 100Ω
7. Torque signal amplitude: not less than 0.2V, not more than 20V effective value
8. Amplitude of external speed signal: greater than 4v (pulse amplitude)
9. Torque acquisition circuit input impedance: 10KΩ
10. Input impedance of external speed acquisition circuit: 10KΩ
11. Power consumption: less than 10w
12, automatic identification and display of positive and negative torque
13. Torque and speed alarm output signals: the voltage is 5V, and the current of each channel is less than 50mA. (This unit is optional)
Introduction to front and rear panels
The front panel is equipped with three buttons of “Parameter”, “Up” and “Down” to realize human-machine dialogue. It is equipped with "Signal 1", "Signal 2", "Signal 3", and "External Speed". 4 LEDs are used to indicate the working status of the instrument. "Signal 1", "Signal 2", and "Signal 3" lights indicate whether the corresponding signal is input; "External speed" lights indicate the source of the speed measurement signal.
Third, the system settings
The system needs to set the following parameters:
1. Torque range 2. Speed range 3. Sensor coefficient 4. Speed input selection 5. Torque sensor teeth number 6. External speed sensor teeth number 7. Sampling cycle 8. Serial port communication address 9. Torque reset 10. Speed reset 11. Speed compensation zero 12. Serial port communication selection 13. Timing print switch 14. Timing print time 15. Torque analog polarity 16. Torque alarm threshold (optional) 17. Speed alarm threshold (optional)
The “Parameter” key is a multi-function key for setting 16 system parameters. The "Up" key is used to compensate the torque and modify system parameters; the "Down" key is used to manually print and modify system parameters.
When the instrument is powered on, two frames of information are displayed: the first frame displays the instrument model (tr-1c) and the instrument's factory number (such as 5801); the second frame displays "torque range", "sensor coefficient", and "serial communication address" To check whether the key parameters are correct.
Press the "Parameter" key once, the system enters the parameter setting state. At this time, F1 is displayed in the power display window (see below).
XXXXX (torque range value) F1
Press the "Parameter" key again to display F2, ... until F16, F1 ~ F16 respectively correspond to the above 16 parameters. When F16 is displayed, if you press the "Parameter" key again, at this time, "——" is displayed at the power position, the system stores the above 16 parameters (not lost after power failure), and then automatically returns to the working state.
Use the "Parameter" key to select the parameter, and use the "Up" and "Down" keys to change the set value.
(1) Torque range F1
Used to set the range of the torque. This value is the range of the torque sensor.
The values are 1, 2, 5 ... 10000, 20000, 50000.
(2) Speed range F2
It is used to set the speed range. It is used to scale the analog voltage output of the speed. This value is the maximum value of the measured speed signal. The values are 1, 2, 5 ... 10000, 20000, 50000.
(3) Sensor coefficient F3
Used to set the coefficient of the torque sensor.
When the calibration coefficient of the torque sensor is "1 ***", multiply the calibration coefficient by 5 and input the obtained value as the "torque sensor coefficient". When the calibration coefficients of the torque sensor are "7 ＊＊＊", "8 ＊＊＊", "9 ＊＊＊", enter this calibration coefficient directly.
(4) Speed input selection F4
Used to select the signal source for collecting speed.
When "in" is displayed, the signal indicating the collected rotation speed is derived from the torque sensor; when "out" is displayed, it indicates that the signal is derived from the external photoelectric sensor, and at this time, the "external speed" light is on.
(5) Number of teeth of the torque sensor F5
Used to set the number of teeth of the torque sensor. Range: 1 ~ 250.
(6) Number of teeth of external speed sensor F6
Used to set the number of teeth of the external speed sensor. When it is not necessary to use the external speed sensor to collect the speed, this parameter can be omitted. Range: 1 ~ 250.
(7) Sampling cycle selection F7
The selectable values are 0.1 second, 1 second, 2 seconds, and 4 seconds.
(8) Serial communication address F8
Used to set the communication address of this machine, the range is 0 ~ 30. When there is no communication, this parameter may not be set.
(9) Torque clear F9
In F9 state, use the “Up” or “Down” key to clear the torque (clear the initial torque compensation value). When “0” is displayed, it means that the initial torque compensation value of the system is zero; when it is blank, it means that the initial torque compensation value of the system is not zero. Clearing the torque zero compensation value can be used to collect the phase of the torque sensor (set range is 100 and the coefficient is 7200). The torque value displayed by the instrument is the phase of the sensor.
(10) Speed is reset to F10
In F10 state, use the "Up" or "Down" key to clear the speed (clear the deducted initial speed value). When "0" is displayed, it means that the system's initial speed deduction value is zero; when it is blank, it means that the system's initial speed deduction value is not zero.
(11) Speed compensation zero F11
In F11 state, use the "Up" or "Down" key to operate. The subtracted speed value is displayed in the speed window. This operation is used to subtract the initial relative speed value of the sensor. If the small motor of the sensor is started and no external speed sensor is installed on the main shaft, the actual speed of the main shaft can be obtained by subtracting the small motor speed from the internal speed. The specific method is: do not start the measured object, set the spindle speed to 0, start the small motor, press the "up" or "down" key, the system automatically zeroes the speed and stores the zero-added value without using Do this all the time.
(12) Serial communication selection F12
The communication port of the instrument is a multi-function port, which can interface with a computer or a micro printer.
In the F12 state, use the "Up" or "Down" key to operate. There are two states: "Con" and "Pri".
"Con": communication with the computer; "Pri": interface with the printer.
(13) Timing print switch F13
In F13 state, use the "Up" or "Down" key to operate. There are two states of "on" and "OFF".
(14) Printing time F14
In F14 state, use the "Up" or "Down" key to change the timing printing time.
1. When the sampling period is 0.1 seconds, the time interval for timing printing is (unit: second): display value × 0.1;
2. When the sampling period is 1 second, the time interval for timing printing is (unit: second): display value;
3. When the sampling period is 2 seconds, the time interval for timed printing is (unit: second): display value × 2
4. When the sampling period is 4 seconds, the time interval for time printing is (unit: second): display value × 4
(15) Polarity selection of torque analog output F15
In the F15 state, use the "Up" or "Down" keys to change the polarity of the torque analog output.
When "POL" is displayed, the direction of the torque analog band is 0Nm corresponding to 5V output; forward full-scale output is 10V; reverse full-scale output is 0V.
When “no” is displayed, the torque analog has no direction, 0Nm corresponds to 0V output; forward and reverse full-scale output is 10V.
(16) Torque alarm output threshold F16 (optional)
In F16 state, use the "Up" or "Down" key to change the torque alarm output threshold.
(17) Speed alarm output threshold F17 (optional)
In F17 state, use the "Up" or "Down" key to change the speed alarm output threshold.
Fourth, torque zero compensation
This operation is used to compensate the initial phase of the sensor and the additional torque of the rotating device. There are two methods.
(1) Turn on the auxiliary motor of the torque sensor to generate an initial phase signal and perform zero compensation. After zero compensation is completed, turn off the auxiliary motor. This method is used to collect power devices, such as motors.
(2) Release the load, turn on the main motor, and perform zero compensation. This method is used to collect transmission devices, such as reducers.
The method is: in the non-parameter setting state, press and hold the "Up" key without releasing until the displayed torque value is approximately zero (about 3 seconds), the system automatically performs torque zero compensation and stores the zero compensation value. You need to do this every time you use it.
Five, manual printing
In the non-parameter setting state, press the "Down" key.
Connection of sensors
(1) Connect the two signal wires of the torque sensor to the "Signal 1" and "Signal 2" sockets of the instrument. The two are non-directional.
(2) Connect the signal line of the speed sensor to the "Signal 3" socket of the instrument. When it is not necessary to use an external speed sensor to collect the speed, do not connect this signal. The terminal pins are configured as:
1 pin: + 12v 2 pin: signal 3 pin: ground
When the sensor is running, the “Signal 1”, “Signal 2”, and “Signal 3” indicators are on, indicating whether the corresponding signal connections are correct.
Seven, analog output
The "analog" output terminal outputs 2 analog voltages, corresponding to the collected values of torque and speed. When the collected value of torque (or speed) reaches the range, it outputs a DC voltage of 10V. The terminal pins are configured as:
1 foot: torque analog 2 foot: ground 3 foot: speed analog
Eight, torque, speed alarm signal output (optional)
When the torque and speed are greater than the threshold, the instrument outputs switching signals to drive external components, such as solid state relays.
Pins 1, 2: Torque alarm output 1 (+), 2 (-)
Pins 3 and 4: Speed alarm output 3 (+), 4 (-)
Nine, computer communication connection
The instrument provides an RS232 (or RS485) serial interface to communicate with other devices. The serial communication port (DB9) pins are as follows:
RS232 interface: 2 feet: TXD 3 feet: RXD 5 feet: ground
RS485 interface: 2 feet: A 3 feet: B 5 feet: ground
Provide TR.dll dynamic link library for users to call directly. The TR.dll dynamic link library includes the TR_DATA procedure for reading the current value.
The DELPHI language process states as follows:
procedure TR_DATA (port, addr_mcu: integer; var NM, RPM: real); stdcall;
The VB language process states as follows:
Private Declare Sub TR_DATA Lib "TR.dll" (ByVal Port As Integer, ByVal addr_mcu As Integer, NM As Double, rpm As Double);
port: computer COM port value. The values are 1, 2, 3, and so on. "1" means COM1 port, "2" means COM2 port
addr_mcu: Communication address of torque tachometer. Its value is 0, 1, 2 ... 255, and it must be the same as the communication address of the torque tachometer.
NM: Torque value
RPM: speed value
NM, RPM return value description:
1. When the NM or RPM value is -100000, it means the communication fails. Possible reasons are: the computer COM port value (port) is set incorrectly; the value of addr_mcu is different from the communication address of the torque tachometer;
2. When the NM or RPM value is -200000, it indicates that an error occurred during data transmission. This communication data can be discarded.
3． When the NM or RPM value is -300000, it means that the data sent by the torque tachometer overflows, and the communication data can be discarded.
Ten, mini printer interface
The instrument is connected to the printer through an RS232 (or RS485) serial interface and outputs ASCII code.
Serial port communication format: Baud rate is 9600, no parity bit.
Printing style: 0.00000Nm 0.0000r / min 0.0000kW
Eleven matters needing attention
(1) Correctly set the "torque range F1", "sensor coefficient F3", "speed input selection F4", and "torque sensor teeth number F5", otherwise the acquisition result will be wrong.
(2) Use the correct method to fill in zeros.
(3) When the speed of the torque sensor is low (less than about 50r / min), the amplitude of the output signal of the torque sensor is small, which may cause the instrument to fail to collect correctly, and the torque and speed values are unstable. It is better to turn on the auxiliary motor of the torque sensor to increase the relative speed of the sensor.
(4) Selection of sampling period
Usually, the sampling time is 1S, but if the working conditions are not stable or there are periodic fluctuations, and you want a stable average acquisition value, you can set the sampling period to 2s or 4s. When you need to collect the changing process of faster working conditions, you can choose a sampling period of 0.1s. If the signal frequency is not high enough, increasing the sampling rate is meaningless.