CN212779690U - Single-channel torque remote measuring system - Google Patents
Single-channel torque remote measuring system Download PDFInfo
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- CN212779690U CN212779690U CN202021482084.4U CN202021482084U CN212779690U CN 212779690 U CN212779690 U CN 212779690U CN 202021482084 U CN202021482084 U CN 202021482084U CN 212779690 U CN212779690 U CN 212779690U
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Abstract
The utility model discloses a single-channel torque remote measuring system, which comprises a receiver and a signal acquisition and transmission integrated machine fixed on a rotating shaft, wherein the signal acquisition and transmission integrated machine comprises a stress sensor arranged on the rotating shaft, a signal acquisition and conditioning circuit connected with the stress sensor and a wireless signal transmitter connected with the signal acquisition and conditioning circuit; the receiver comprises a wireless signal receiver connected with the wireless signal transmitter in a wireless communication mode, a signal conversion circuit connected with the wireless signal receiver, and a microprocessor connected with the signal conversion circuit. The system provided by the utility model, can be used to test the torque of countershaft.
Description
Technical Field
The utility model relates to a torque testing technique, concretely relates to single channel torque remote measurement system.
Background
The speed reducer is an independent closed transmission device between a prime motor and a working machine, is used for reducing the rotating speed and increasing the torque so as to meet the working requirement, and mainly comprises accessories such as transmission parts, shafts, bearings and the like; the hoist is mechanical equipment which can be transported by changing, such as a mine hoist, a dam-crossing hoist and the like, and an elevator, a crown block, a crane, a hoist and the like can be called as the hoist.
The speed reducer in the hoister plays an important role in controlling the speed of hoisting materials, in a working project, a shaft between the speed reducer and the hoister is in a rotating state, and the existing testing system connected by wires cannot test parameters such as torque and the like of the shaft between the hoister and the speed reducer in the rotating state.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: it is desirable to provide a single channel torque telemetry system that can be used for torque testing of a rotating shaft.
The technical scheme is as follows: the system provided by the utility model comprises a receiver and a signal acquisition and transmission integrated machine;
the signal acquisition and emission integrated machine is fixed on the rotating shaft; the signal acquisition and transmission integrated machine comprises a stress sensor for testing the torsion of the rotating shaft, a signal acquisition circuit connected with the stress sensor and a wireless signal transmitter connected with the signal acquisition circuit;
the receiver comprises a wireless signal receiver connected with the wireless signal transmitter in a wireless communication mode, a signal conversion circuit connected with the wireless signal receiver, and a microprocessor connected with the signal conversion circuit.
The signal acquisition and transmission all-in-one machine also comprises a shell fixed on the rotating shaft.
The non-contact power supply device comprises a primary coil and a secondary coil;
the primary coil, the secondary coil and the rotating shaft are coaxial; in the process of rotating the rotating shaft, the primary coil is static relative to the receiver, and the secondary coil is static relative to the rotating shaft;
the primary coil is externally connected with a power supply, and is used for supplying power to the wireless signal receiver, the signal conversion circuit and the microprocessor; and the secondary coil is used for supplying power to the stress sensor, the signal acquisition and conditioning circuit and the wireless signal transmitter.
The secondary coil is connected with the stress sensor through the voltage stabilizer.
A first signal output end and a second signal output end of the stress sensor are respectively butted with a first signal input end and a second signal input end of the signal acquisition circuit;
the signal acquisition circuit comprises an amplifying filter circuit and a voltage-frequency conversion circuit; the amplifying and filtering circuit comprises an amplifier U1, a negative input end and a positive input end of the amplifier U1 respectively form a first signal input end and a second signal input end of the signal acquisition circuit, a resistor R6 is connected in series between a first gain resistor connecting end and a second gain resistor connecting end of the U1 of the amplifier, and a bias voltage connecting end of the U1 of the amplifier is respectively connected with an adjustable resistor Rx1And an adjustable resistor Rx2One end of (1), an adjustable resistor Rx1The other end of the resistor is externally connected with a bias voltage and an adjustable resistor Rx2The output end of the amplifier U1 is connected with a resistor R7 in series and then is respectively connected with one end of a capacitor C1 and one end of a resistor R8; the other end of the resistor R8 is connected with the positive input end of the amplifier U2 and one end of the capacitor C2, and the other end of the capacitor C2 is grounded; the negative input end of the amplifier U2, the other end of the capacitor C1 and the output end of the amplifier U2 are connected, and the connection point forms the signal output end of the amplifying and filtering circuit; the signal output end of the amplifying and filtering circuit is connected with the signal input end of the voltage-frequency conversion circuit;
the voltage-frequency conversion circuit comprises an adjustable resistor R13, one end of an adjustable resistor R13 forms a signal input end of the voltage-frequency conversion circuit, and the other end of an adjustable resistor R13 is connected with one end of a capacitor C3, a negative input end of an amplifier U4 and a current source output end of a voltage-frequency converter U3; the other end of the capacitor C3 is connected with a resistor R15 in series and then is connected with a comparison input end of a voltage-frequency converter U3; the positive input end of the amplifier U4 is connected with the anode of the diode D1 after being connected with the resistor R16 in series, and the cathode of the diode D1 is connected with the output end of the amplifier U4; the connection point of the resistor R16 and the diode D1 is grounded; a reference current connecting end of the voltage-frequency converter U3 is connected with one end of the resistor R9 after being connected with the resistor R12 in series, and a connecting end of the resistor R12 and the resistor R9 is grounded; the other end of the resistor R9 is respectively connected with one end of a resistor R10 and a threshold connection end of the voltage-frequency converter U3; the other end of the resistor R10 is respectively connected with one end of a resistor R11 and a power supply end of the voltage-frequency converter U3; the other end of the resistor R11 is respectively connected with one end of the capacitor C4 and the RC timing circuit connecting end of the voltage-frequency converter U3; the other end of the capacitor C4 is grounded; the other end of the resistor R14 is connected with the frequency output end of the voltage-frequency converter U3, and one end of the resistor R14 is externally connected with external voltage; the frequency output end of the voltage-frequency converter U3 forms the signal output end of the signal acquisition circuit.
The signal output end of the wireless signal receiver is connected with the signal input end of the signal conversion circuit, and the signal output end of the signal conversion circuit is connected with the microprocessor;
the signal conversion circuit comprises a capacitor C5, and one end of a capacitor C5 forms a signal input end of the signal conversion circuit; the other end of the capacitor C5 is connected with a threshold connection end of the frequency-voltage converter U5 and one end of the resistor R19; the other end of the resistor R19 is connected with one end of a resistor R18, a power supply end of the frequency-voltage converter U5 and one end of a resistor R20; the other end of the resistor R18 is connected with the comparison input end of the frequency-voltage converter U5 and one end of the resistor R17, and the other end of the resistor R17 is grounded; the other end of the resistor R20 is connected with the RC timing circuit connection end of the frequency-voltage converter U5 and one end of the capacitor C6, and the other end of the capacitor C6 is grounded; a reference current connecting end of the frequency-voltage converter U5 is sequentially connected with the resistor R21 and the adjustable resistor R22, and then is connected with a frequency output end of the frequency-voltage converter U5 and a grounding end of the frequency-voltage converter U5; the current source output end of the frequency-voltage converter U5 is connected with one end of a capacitor C7 and one end of a resistor R23, and the connection point forms the signal output end of the signal conversion circuit; the other ends of the capacitor C7 and the resistor R23 are grounded;
the signal conversion circuit outputs a voltage signal to the microprocessor, and the torque of the rotating shaft is obtained according to a voltage-torque corresponding list prestored in the microprocessor.
A first signal output end and a second signal output end of the stress sensor are respectively butted with a first signal input end and a second signal input end of the signal acquisition circuit;
the stress sensor includes a stress test circuit, the stress test circuit including: a resistance strain gauge R1 and a resistance strain gauge R3 with one resistance bit, a resistance strain gauge R2, a resistance strain gauge R4 and a resistance strain gauge R5 with a plurality of resistance bits;
one end of the resistance strain gauge R5 is connected with one end of the resistance strain gauge R1 and one end of the resistance strain gauge R2, and the connection point forms a power supply end of the stress test circuit; the other end of the resistance strain gauge R2 is connected with one end of the resistance strain gauge R4, and the connection point forms a first signal output end of the stress sensor; the other end of the resistance strain gauge R4 is connected with one end of the resistance strain gauge R3, and the connection point is grounded; the other end of the resistance strain gauge R3 is connected with the other end of the resistance strain gauge R1, and the connection point forms a second signal output end of the stress sensor.
The resistance strain gauge R1, the resistance strain gauge R2, the resistance strain gauge R3, the resistance strain gauge R4 and the resistance strain gauge R5 are fixed on the rotating shaft through strain glue
Has the advantages that: compared with the prior art, the utility model provides a torque remote measuring system has simple structure's advantage and can be used to carry out the torque test to the pivot in the rotation.
Drawings
FIG. 1 is a schematic diagram of a torque telemetry system;
fig. 2 is a schematic diagram of a circuit connection of a signal acquisition and transmission integrated machine provided by an embodiment of the present invention;
FIG. 3 is a view in the direction A of the schematic structure shown in FIG. 1;
FIG. 4 is a view in the direction B of the schematic structure shown in FIG. 1;
fig. 5 is a schematic diagram of a signal acquisition circuit provided by an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a voltage-to-frequency conversion circuit according to an embodiment of the present invention;
fig. 7 is a circuit schematic diagram of a frequency-to-voltage conversion circuit according to an embodiment of the present invention;
in the figure: 1. a receiver; 2. a signal acquisition and transmission integrated machine; 3. a rotating shaft; 4. a stress sensor; 5. a signal acquisition circuit; 6. a wireless signal transmitter; 7. a wireless signal receiver; 8. a signal conversion circuit; 9. a housing; 10. code disc; 11. a microprocessor; 12. a data transmission device; 13. hall probe, 14, data transmission device, 15, primary coil; 16. a secondary coil.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1, the utility model provides a single channel torque telemetering system, including receiver 1, signal acquisition transmission all-in-one 2.
The signal acquisition and emission all-in-one machine 2 comprises a shell 9, wherein the shell 9 consists of two semi-rings, the two semi-rings are buckled with each other to form an annular shell 9, the middle part of the annular shell 9 is sleeved on the rotating shaft 3 and is fixed on the rotating shaft 3 through a screw, and the annular shell 9 and the rotating shaft 3 are coaxially arranged.
The signal acquisition and transmission integrated machine 2 comprises a stress sensor 4 for testing the torsion of the rotating shaft 3, a signal acquisition circuit 5 connected with the stress sensor 4, and a wireless signal transmitter 6 connected with the signal acquisition circuit 5;
the receiver 1 includes a wireless signal receiver 7 connected in wireless communication with a wireless signal transmitter 6, a signal conversion circuit 8 connected to the wireless signal receiver 7, and a microprocessor 11 connected to the signal conversion circuit 8.
Referring to fig. 3 and 4, the system further includes a contactless power supply device including a primary coil 15 and a secondary coil 16;
the primary coil 15, the secondary coil 16 and the rotating shaft 3 are coaxial; during the rotation of the shaft 3, the primary coil 15 is stationary with respect to the receiver 1 and the secondary coil 16 is stationary with respect to the shaft 3;
the primary coil 15 is externally connected with a power supply, and the primary coil 15 is used for supplying power to the wireless signal receiver 7, the signal conversion circuit 8 and the microprocessor 11; the secondary coil 16 is used for supplying power to the stress sensor 4, the signal acquisition and conditioning circuit 5 and the wireless signal transmitter 6.
Referring to fig. 2, the secondary coil 16 is connected to the stress sensor 4 via a potentiostat. A first signal output end and a second signal output end of the stress sensor 4 are respectively in butt joint with a first signal input end and a second signal input end of the signal acquisition circuit 5, and the signal acquisition circuit 5 comprises an amplifying filter circuit and a voltage-frequency conversion circuit.
A first signal output end and a second signal output end of the stress sensor 4 are respectively butted with a first signal input end and a second signal input end of the signal acquisition circuit 5;
the stress sensor 4 includes a stress test circuit including: a resistance strain gauge R1 and a resistance strain gauge R3 each having one resistance level, a resistance strain gauge R2, a resistance strain gauge R4, and a resistance strain gauge R5 each having a plurality of resistance levels;
one end of the resistance strain gauge R5 is connected with one end of the resistance strain gauge R1 and one end of the resistance strain gauge R2, and the connection point forms a power supply end of the stress test circuit; the other end of the resistance strain gauge R2 is connected with one end of the resistance strain gauge R4, and the connection point forms a first signal output end of the stress sensor 4; the other end of the resistance strain gauge R4 is connected with one end of the resistance strain gauge R3, and the connection point is grounded; the other end of the resistance strain gauge R3 is connected with the other end of the resistance strain gauge R1, and the connection point forms a second signal output end of the stress sensor 4.
The resistance strain gauge R1, the resistance strain gauge R2, the resistance strain gauge R3, the resistance strain gauge R4 and the resistance strain gauge R5 are fixed on the rotating shaft through strain glue.
Referring to fig. 5, the amplifying and filtering circuit includes an amplifier U1, a negative input terminal and a positive input terminal of the amplifier U1 respectively constitute a first signal input terminal and a second signal input terminal of the signal acquisition circuit 5, a resistor R6 is connected in series between a first gain resistor connection terminal and a second gain resistor connection terminal of the amplifier U1, and a bias voltage connection terminal of the amplifier U1 is respectively connected to an adjustable resistor Rx1And an adjustable resistor Rx2One end of (1), an adjustable resistor Rx1The other end of the resistor is externally connected with a bias voltage and an adjustable resistor Rx2The output end of the amplifier U1 is connected with a resistor R7 in series and then is respectively connected with one end of a capacitor C1 and one end of a resistor R8; the other end of the resistor R8 is connected with the positive input end of the amplifier U2 and one end of the capacitor C2, and the other end of the capacitor C2 is grounded; the negative input end of the amplifier U2, the other end of the capacitor C1 and the output end of the amplifier U2 are connected, and the connection point forms the signal output end of the amplifying and filtering circuit; and the signal output end of the amplifying and filtering circuit is connected with the signal input end of the voltage-frequency conversion circuit.
A positive voltage end and a negative voltage end of the amplifier U1 are respectively connected with the positive pole and the negative pole of external voltage; the model of the amplifier U1 is AD621 AN; a positive voltage end and a negative voltage end of the amplifier U2 are respectively connected with the positive pole and the negative pole of external voltage; the amplifier U2 is model OP 191.
Referring to fig. 6, the voltage-to-frequency conversion circuit includes an adjustable resistor R13, one end of the adjustable resistor R13 forms a signal input end of the voltage-to-frequency conversion circuit, and the other end of the adjustable resistor R13 is connected to one end of a capacitor C3, a negative input end of an amplifier U4, and a current source output end of a voltage-to-frequency converter U3; the other end of the capacitor C3 is connected with a resistor R15 in series and then is connected with a comparison input end of a voltage-frequency converter U3; the positive input end of the amplifier U4 is connected with the anode of the diode D1 after being connected with the resistor R16 in series, and the cathode of the diode D1 is connected with the output end of the amplifier U4; the connection point of the resistor R16 and the diode D1 is grounded; a reference current connecting end of the voltage-frequency converter U3 is connected with one end of the resistor R9 after being connected with the resistor R12 in series, and a connecting end of the resistor R12 and the resistor R9 is grounded; the other end of the resistor R9 is respectively connected with one end of a resistor R10 and a threshold connection end of the voltage-frequency converter U3; the other end of the resistor R10 is respectively connected with one end of a resistor R11 and a power supply end of the voltage-frequency converter U3; the other end of the resistor R11 is respectively connected with one end of the capacitor C4 and the RC timing circuit connecting end of the voltage-frequency converter U3; the other end of the capacitor C4 is grounded; one end of the resistor R14 is externally connected with external voltage, and the other end of the resistor R14 is connected with the frequency output end of the voltage-frequency converter U3; the frequency output end of the voltage-frequency converter U3 constitutes the signal output end of the signal acquisition circuit 5.
A positive voltage end and a negative voltage end of the amplifier U4 are respectively connected with the positive pole and the negative pole of external voltage; the type of the amplifier U4 is OP 191; the model of the voltage-frequency converter U3 is LM 331.
The signal output end of the wireless signal receiver 7 is connected with the signal input end of the signal conversion circuit 8, and the signal output end of the signal conversion circuit 8 is connected with the microprocessor;
referring to fig. 7, the signal conversion circuit 8 includes a capacitor C5, and one end of the capacitor C5 constitutes a signal input terminal of the signal conversion circuit 8; the other end of the capacitor C5 is connected with a threshold connection end of the frequency-voltage converter U5 and one end of the resistor R19; the other end of the resistor R19 is connected with one end of a resistor R18, a power supply end of the frequency-voltage converter U5 and one end of a resistor R20; the other end of the resistor R18 is connected with the comparison input end of the frequency-voltage converter U5 and one end of the resistor R17, and the other end of the resistor R17 is grounded; the other end of the resistor R20 is connected with the RC timing circuit connection end of the frequency-voltage converter U5 and one end of the capacitor C6, and the other end of the capacitor C6 is grounded; a reference current connecting end of the frequency-voltage converter U5 is sequentially connected with a resistor R21, an adjustable resistor R22, a frequency output end of the frequency-voltage converter U5 and a grounding end of the frequency-voltage converter U5; the current source output end of the frequency-voltage converter U5 is connected with one end of a capacitor C7 and one end of a resistor R23, and the connection point forms the signal output end of the signal conversion circuit 8; the other ends of the capacitor C7 and the resistor R23 are grounded; the frequency-voltage converter U5 is LM 331-2.
The signal conversion circuit 8 outputs a voltage signal to the microprocessor 11, and obtains the torque of the rotating shaft 3 according to a voltage-torque correspondence list prestored in the microprocessor 11.
A coded disc 10 is arranged on the periphery of a shell 9 of the signal collecting and transmitting all-in-one machine 2, and when the rotating shaft 3 rotates, the coded disc 10 fixed on the shell of the signal collecting and transmitting all-in-one machine 2 rotates along with the rotating shaft 3; a Hall probe 13 is arranged in the receiver 1 at a position opposite to the coded disc 9; the code disc 10 and the Hall probe 13 form a Hall rotating speed sensor. When the coded disc 10 rotates along with the rotating shaft 3, the Hall probe 13 tests the magnetic information of the coded disc 10, and obtains the rotating speed information of the rotating shaft 3 according to the received magnetic information, and the information collector 12 in the receiver 1 collects the rotating speed information sent by the Hall probe 13.
The data transmission device 14 acquires the rotating speed information acquired by the information acquisition device 12 and the torque information transmitted by the microprocessor 11, and transmits the information to the data terminal.
The primary coil 15 is also used for supplying power to the Hall probe 13, the information collector 12 and the data transmission device 14.
In one embodiment, the primary coil 15 is fixed to a first toroidal support, which is stationary with respect to the ground; the secondary coil 16 is fixed on a second annular bracket, the second annular bracket 16 is fixed on the rotating shaft 3 and is arranged coaxially with the rotating shaft 3, or the second annular bracket is fixed on the shell 8 and is arranged coaxially with the rotating shaft 3; the secondary coil 16 is wound around a soft magnetic core; the soft magnetic iron core is fixed on the second annular bracket;
gaps are reserved between the first rings and between the second ring-shaped supports, the primary coil 15 is not in contact with the soft magnetic core, and the primary coil 15 is not in contact with the secondary coil 16; the primary coil 15 is connected to an external power source, and the secondary coil 16 generates an induced current by electromagnetic coupling with the primary coil 15.
The utility model provides a single channel torque remote measurement system simple structure through non-contact power supply unit to and fix in the epaxial signal acquisition transmission all-in-one of changeing, fix at subaerial receiver, realized the test to the torque of pivot. The torque of the shaft can be determined by the magnitude of the stress and the length of the force arm, and the length of the force arm can be determined according to the installation position of the sensor; signal collector 12 includes NI-CompactR10, and the above is only the preferred embodiment of the present invention, and it will be apparent to those skilled in the art that a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (8)
1. A single-channel torque telemetering system is used for detecting the torque of a rotating shaft (3), and is characterized by comprising a receiver (1) and a signal acquisition and transmission integrated machine (2);
the signal acquisition and emission integrated machine (2) is fixed on the rotating shaft (3); the signal acquisition and transmission integrated machine (2) comprises a stress sensor (4) for testing the torsion of the rotating shaft (3), a signal acquisition circuit (5) connected with the stress sensor (4), and a wireless signal transmitter (6) connected with the signal acquisition circuit (5);
the receiver (1) comprises a wireless signal receiver (7) which is in wireless communication connection with the wireless signal transmitter (6), a signal conversion circuit (8) which is connected with the wireless signal receiver (7), and a microprocessor (11) which is connected with the signal conversion circuit (8).
2. The single channel torque telemetry system of claim 1, wherein the signal acquisition and transmission all-in-one machine (2) further includes a housing (9) secured to the shaft (3).
3. The single channel torque telemetry system of claim 1, further comprising a contactless power supply comprising a primary coil (15), a secondary coil (16);
the primary coil (15), the secondary coil (16) and the rotating shaft (3) are coaxial; during the rotation of the rotating shaft (3), the primary coil (15) is static relative to the receiver (1), and the secondary coil (16) is static relative to the rotating shaft (3);
the primary coil (15) is externally connected with a power supply, and the primary coil (15) is used for supplying power to the wireless signal receiver (7), the signal conversion circuit (8) and the microprocessor (11); the secondary coil (16) is used for supplying power for the stress sensor (4), the signal acquisition circuit (5) and the wireless signal transmitter (6).
4. The single channel torque telemetry system of claim 3, characterized in that the secondary coil (16) is connected to the stress sensor (4) by a potentiostat.
5. The single channel torque telemetry system of claim 1, characterized in that the first and second signal outputs of the stress sensor (4) are respectively interfaced with first and second signal inputs of a signal acquisition circuit (5);
the signal acquisition circuit (5) comprises an amplifying filter circuit and a voltage-frequency conversion circuit; the amplifying and filtering circuit comprises an amplifier U1, a negative input end and a positive input end of the amplifier U1 form a first signal input end and a second signal input end of the signal acquisition circuit (5) respectively, a resistor R6 is connected in series between a first gain resistor connecting end and a second gain resistor connecting end of the U1 of the amplifier, and a bias voltage connecting end of the U1 of the amplifier is connected with an adjustable resistor R respectivelyx1And an adjustable resistor Rx2One end of (1), an adjustable resistor Rx1The other end of the resistor is externally connected with a bias voltage and an adjustable resistor Rx2The output end of the amplifier U1 is connected with a resistor R7 in series and then is respectively connected with one end of a capacitor C1 and one end of a resistor R8; the other end of the resistor R8 is connected with an amplifierThe positive input end of the amplifier U2 and one end of a capacitor C2, and the other end of the capacitor C2 is grounded; the negative input end of the amplifier U2, the other end of the capacitor C1 and the output end of the amplifier U2 are connected, and the connection point forms the signal output end of the amplifying and filtering circuit; the signal output end of the amplifying and filtering circuit is connected with the signal input end of the voltage-frequency conversion circuit;
the voltage-frequency conversion circuit comprises an adjustable resistor R13, one end of an adjustable resistor R13 forms a signal input end of the voltage-frequency conversion circuit, and the other end of an adjustable resistor R13 is connected with one end of a capacitor C3, a negative input end of an amplifier U4 and a current source output end of a voltage-frequency converter U3; the other end of the capacitor C3 is connected with a resistor R15 in series and then is connected with a comparison input end of a voltage-frequency converter U3; the positive input end of the amplifier U4 is connected with the anode of the diode D1 after being connected with the resistor R16 in series, and the cathode of the diode D1 is connected with the output end of the amplifier U4; the connection point of the resistor R16 and the diode D1 is grounded; a reference current connecting end of the voltage-frequency converter U3 is connected with one end of the resistor R9 after being connected with the resistor R12 in series, and a connecting end of the resistor R12 and the resistor R9 is grounded; the other end of the resistor R9 is respectively connected with one end of a resistor R10 and a threshold connection end of the voltage-frequency converter U3; the other end of the resistor R10 is respectively connected with one end of a resistor R11 and a power supply end of the voltage-frequency converter U3; the other end of the resistor R11 is respectively connected with one end of the capacitor C4 and the RC timing circuit connecting end of the voltage-frequency converter U3; the other end of the capacitor C4 is grounded; the other end of the resistor R14 is connected with the frequency output end of the voltage-frequency converter U3, and one end of the resistor R14 is externally connected with external voltage; the frequency output end of the voltage-frequency converter U3 forms the signal output end of the signal acquisition circuit (5).
6. The single channel torque telemetry system of claim 1, wherein the signal output of the wireless signal receiver (7) is connected to the signal input of the signal conversion circuit (8), the signal output of the signal conversion circuit (8) being connected to the microprocessor;
the signal conversion circuit (8) comprises a capacitor C5, and one end of a capacitor C5 forms a signal input end of the signal conversion circuit (8); the other end of the capacitor C5 is connected with a threshold connection end of the frequency-voltage converter U5 and one end of the resistor R19; the other end of the resistor R19 is connected with one end of a resistor R18, a power supply end of the frequency-voltage converter U5 and one end of a resistor R20; the other end of the resistor R18 is connected with the comparison input end of the frequency-voltage converter U5 and one end of the resistor R17, and the other end of the resistor R17 is grounded; the other end of the resistor R20 is connected with the RC timing circuit connection end of the frequency-voltage converter U5 and one end of the capacitor C6, and the other end of the capacitor C6 is grounded; a reference current connecting end of the frequency-voltage converter U5 is sequentially connected with the resistor R21 and the adjustable resistor R22, and then is connected with a frequency output end of the frequency-voltage converter U5 and a grounding end of the frequency-voltage converter U5; the current source output end of the frequency-voltage converter U5 is connected with one end of a capacitor C7 and one end of a resistor R23, and the connection point forms the signal output end of a signal conversion circuit (8); the other ends of the capacitor C7 and the resistor R23 are grounded;
the signal conversion circuit (8) outputs a voltage signal to the microprocessor (11), and the torque of the rotating shaft (3) is obtained according to a voltage-torque correspondence list prestored in the microprocessor.
7. The single channel torque telemetry system of claim 1, characterized in that the first and second signal outputs of the stress sensor (4) are respectively interfaced with the first and second signal inputs of the signal acquisition circuit (5);
the stress sensor (4) comprises a stress test circuit comprising: a resistance strain gauge R1 and a resistance strain gauge R3 with one resistance bit, a resistance strain gauge R2, a resistance strain gauge R4 and a resistance strain gauge R5 with a plurality of resistance bits;
one end of the resistance strain gauge R5 is connected with one end of the resistance strain gauge R1 and one end of the resistance strain gauge R2, and the connection point forms a power supply end of the stress test circuit; the other end of the resistance strain gauge R2 is connected with one end of the resistance strain gauge R4, and the connection point forms a first signal output end of the stress sensor (4); the other end of the resistance strain gauge R4 is connected with one end of the resistance strain gauge R3, and the connection point is grounded; the other end of the resistance strain gauge R3 is connected with the other end of the resistance strain gauge R1, and the connection point forms a second signal output end of the stress sensor (4).
8. The single channel torque telemetry system of claim 7, wherein the resistive strain gage R1, resistive strain gage R2, resistive strain gage R3, resistive strain gage R4, and resistive strain gage R5 are secured to the shaft by strain glue.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021482084.4U CN212779690U (en) | 2020-07-24 | 2020-07-24 | Single-channel torque remote measuring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021482084.4U CN212779690U (en) | 2020-07-24 | 2020-07-24 | Single-channel torque remote measuring system |
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| CN212779690U true CN212779690U (en) | 2021-03-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198498A (en) * | 2021-12-09 | 2022-03-18 | 中国船舶重工集团公司第七0三研究所 | Non-contact real-time temperature monitoring system for planet wheel bearing for gear box |
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2020
- 2020-07-24 CN CN202021482084.4U patent/CN212779690U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198498A (en) * | 2021-12-09 | 2022-03-18 | 中国船舶重工集团公司第七0三研究所 | Non-contact real-time temperature monitoring system for planet wheel bearing for gear box |
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