CN112504525A - Passive low-power-consumption torque sensor of vehicle transmission shaft - Google Patents
Passive low-power-consumption torque sensor of vehicle transmission shaft Download PDFInfo
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- CN112504525A CN112504525A CN202011402460.9A CN202011402460A CN112504525A CN 112504525 A CN112504525 A CN 112504525A CN 202011402460 A CN202011402460 A CN 202011402460A CN 112504525 A CN112504525 A CN 112504525A
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- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 3
- 229910002113 barium titanate Inorganic materials 0.000 claims description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/108—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving resistance strain gauges
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/183—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using impacting bodies
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- Engineering & Computer Science (AREA)
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Abstract
The invention relates to a passive low-power-consumption torque sensor of a vehicle transmission shaft. The torque sensor comprises a strain gauge, a connecting wire, a signal processing and low power consumption transmitting module, an energy accumulator and a power supply module; the power supply module comprises an installation shell, a piezoelectric material, a centrifugal magnetic block, a power supply lead, an induction coil and a spring; the installation shell is rotatory along with the vehicle transmission shaft, and power module's power generation mode has two kinds: firstly, a centrifugal magnetic block impacts a piezoelectric material under the action of rotary centrifugal motion and vibration to generate current; and secondly, the centrifugal magnetic block is used for cutting the magnetic induction line by the induction coil to generate current when moving in the radial direction. The passive power supply, signal wireless transmission and low-energy-consumption signal transmission of the torque sensor are realized, and long-time torque signal acquisition can be carried out; the test device meets the requirements of testing the middle shaft parts of vehicles such as automobiles and tractors, and particularly provides guarantee for long-time collection of load spectrums of vehicle transmission shafts and long-term fault monitoring under the condition of facing field operation of the tractors.
Description
Technical Field
The invention belongs to the field of sensor measurement, and particularly relates to a passive low-power-consumption torque sensor for a vehicle transmission shaft.
Background
The torque sensor is widely applied to reliability and durability tests in the field of vehicles such as automobiles, tractors and engineering vehicles. Vehicle propeller shaft torque testing has two primary purposes: the first is to study the acceleration performance, climbing performance, power matching and other dynamic characteristics of the vehicle; and secondly, the method is applied to a road load spectrum acquisition test and a bench fatigue test to research the fatigue durability of the vehicle.
According to the testing principle, the torque sensor can be classified into strain type, rotation angle phase difference type, magnetoelectric type and the like. Among them, the strain torque sensor is the most mature and widely applied one in the technology at home and abroad. With the development of new technologies, new torque sensors such as optical fiber type, wireless passive Surface Acoustic Wave (SAW) type, and laser doppler type have appeared in recent years.
However, the torque sensor still has problems in power supply, wireless signal transmission and the like.
Domestic wireless torque sensors are mostly powered by batteries, and signal transmitters have high power consumption, large volume and inconvenient installation; the charging type torque sensor has short power supply time and is not suitable for long-time testing. Foreign sensor products comprise a slip ring type torque sensor and a wireless remote measurement type torque sensor, and the slip ring type torque sensor generates heat due to abrasion between a conductive slip ring and a carbon brush to influence the service life and the measurement precision. In addition to the above, the power supply mode of the rotary transformer has high requirements on the use and installation of the field environment; the radio frequency coupling method needs to solve the problems of coupling efficiency, stability and the like.
Currently, most torque sensors are commonly used for industrial monitoring of mechanical equipment. For example, the chinese patent application (application No. 201210118608.5) discloses a strain-type wireless sensor, and proposes a complete solution for a torque-rotational speed test system, but the problem of passive power supply is not solved and the power consumption of a communication module is relatively high, and a long-time test cannot be completed. In consideration of the problems of power supply, wireless transmission and the like of the torque sensor, no suitable product is available in China, and long-time data acquisition and power system fault monitoring of non-road vehicles such as tractors and the like under severe field operation can be achieved.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a passive low-power-consumption torque sensor for a vehicle transmission shaft, which can meet the requirements of testing middle shaft parts of vehicles such as automobiles and tractors, solves the problems of power supply of the sensor, low-power-consumption wireless transmission and long-time testing, and particularly provides a powerful tool for field operation load spectrum acquisition and fault monitoring of the tractors.
In order to achieve the purpose, the invention provides the following technical scheme:
a passive low-power-consumption torque sensor of a vehicle transmission shaft is arranged on a vehicle transmission shaft 1 and comprises a strain gauge 2, a connecting wire 3, a signal processing and low-power-consumption transmitting module 4, an energy accumulator 5 and a power supply module 6.
The strain gauge 2 is adhered to the vehicle transmission shaft 1 along the axis of the vehicle transmission shaft 1; the signal processing and low power consumption transmitting module 4, the energy accumulator 5 and the power supply module 6 are respectively and fixedly connected to the vehicle transmission shaft 1; the signal processing and low power consumption transmitting module 4 and the energy accumulator 5 are wound on the vehicle transmission shaft 1; the strain gauge 2 is connected with the signal processing and transmitting module 4, the signal processing and low-power-consumption transmitting module 4 is connected with the energy accumulator 5, and the energy accumulator 5 is connected with the power supply module 6 through the connecting wires 3.
The power supply module 6 comprises an installation shell 7, a piezoelectric material 8, a centrifugal magnetic block 9, a power supply lead 10, an induction coil 11 and a spring 12; installation shell 7 is the ring form, including the semicircle ring of two removable divisions combinations: a first semicircular ring A and a second semicircular ring B; the first semicircular ring A and the second semicircular ring B are arranged around the vehicle transmission shaft 1 and are fixedly connected to the vehicle transmission shaft 1 through bolts; a plurality of clamping grooves are uniformly formed in the mounting shell 7 along the circumferential direction of the mounting shell, a group of centrifugal magnetic blocks 9 and piezoelectric materials 8 are uniformly arranged in each clamping groove, and the centrifugal magnetic blocks 9 and the piezoelectric materials 8 are sequentially arranged at intervals from inside to outside along the radial direction of the mounting shell 7; the inner end of each centrifugal magnetic block 9 is connected with the inner ring wall of the installation shell 7 through a spring 12, and in the stroke range of the spring 12, the centrifugal magnetic blocks 9 can hit the piezoelectric material 8; an induction coil 11 which is vertical to the radial direction of the mounting shell 7 is fixedly connected to the inner wall of each clamping groove, the induction coil 11 surrounds the outer part of the centrifugal magnetic block 9, and the centrifugal magnetic block 9 performs magnetic induction line motion generated by cutting the induction coil 11 in the process of reciprocating along the radial direction of the mounting shell 7; the piezoelectric materials 8 are connected in parallel through a power supply lead 10.
The installation shell 7 is internally provided with 10 clamping grooves.
The connecting wire 3 and the power supply wire 10 are both copper wires made of the same material.
The piezoelectric material 8 is barium titanate or two-dimensional transition metal carbon/nitride.
The centrifugal magnetic block 9 is a strip magnet with N pole and S pole at two ends.
The signal processing and low power consumption transmitting module 4 comprises a signal processing unit and a low power consumption signal transmitter.
Compared with the prior art, the invention has the beneficial effects that:
1. the passive power supply of the torque sensor is realized by adopting a piezoelectric material-centrifugal magnetic block-spring combined power generation mode and fully utilizing the centrifugal force and vibration of the vehicle transmission shaft rotating under the complex working condition. Meanwhile, the spring buffers the movement of the centrifugal magnetic block, so that the power supply process is more stable, and the damage of the piezoelectric material is avoided.
2. The piezoelectric materials are arranged in groups and connected in parallel, so that the space arrangement is more compact, the defect of high voltage and low current of the piezoelectric materials is overcome, and the power supply requirement of the torque sensor is met.
3. The novel power supply transmission mode of 'power supply module-energy accumulator-low power consumption transmitter' is provided, wireless transmission of signals is achieved, electric energy is stored quantitatively, impact of pulse current is buffered, electric quantity consumption of a system is reduced to the minimum, and the signal transmission process is more stable.
4. The problem that a traditional commercial torque sensor is limited in test scene due to the fact that factors such as a power supply and wired transmission are considered is fundamentally solved, and long-time testing of the torque sensor on a vehicle transmission shaft is achieved.
Drawings
FIG. 1 is a schematic illustration of the installation of the torque sensor of the present invention on a vehicle drive shaft 1;
FIG. 2 is a schematic cross-sectional view of a power supply module according to the present invention;
fig. 3 is a system circuit diagram of the torque sensor of the present invention.
Wherein the reference numerals are:
1 vehicle transmission shaft 2 strain gauge
3 connecting wire 4 signal processing and low power consumption transmitting module
5 energy accumulator 6 power supply module
7 mounting case 8 piezoelectric material
9 centrifugal magnetic block 10 power supply lead
11 induction coil 12 spring
A a first semicircle ring B a second semicircle ring
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1, a passive low-power-consumption torque sensor of a vehicle propeller shaft is provided on a vehicle propeller shaft 1. The torque sensor comprises a strain gauge 2, a connecting wire 3, a signal processing and low power consumption transmitting module 4, an energy accumulator 5 and a power supply module 6.
The strain gauge 2 is adhered to the vehicle transmission shaft 1 along the axis of the vehicle transmission shaft 1 through glue. The signal processing and low power consumption transmitting module 4, the energy accumulator 5 and the power supply module 6 are respectively and fixedly connected to the vehicle transmission shaft 1. Wherein, the signal processing and low power consumption transmitting module 4 and the energy accumulator 5 are tightly wound on the vehicle transmission shaft 1 through an adhesive tape. The strain gauge 2 is connected with the signal processing and transmitting module 4, the signal processing and low-power-consumption transmitting module 4 is connected with the energy accumulator 5, and the energy accumulator 5 is connected with the power supply module 6 through the connecting wires 3.
The signal processing and low power consumption transmitting module 4 comprises a signal processing unit and a low power consumption signal transmitter.
The energy accumulator 5 plays the roles of electric power storage, voltage stabilization and current stabilization.
As shown in fig. 2, the power supply module 6 includes a mounting case 7, a piezoelectric material 8, a centrifugal magnetic block 9, a power supply lead 10, an induction coil 11 and a spring 12. Installation shell 7 is the ring form, including the semicircle ring of two removable divisions combinations: a first semicircular ring A and a second semicircular ring B. The first semicircular ring A and the second semicircular ring B are arranged around the vehicle transmission shaft 1 and are fixedly connected to the vehicle transmission shaft 1 through bolts. The inside of installation shell 7 evenly is equipped with a plurality of draw-in grooves along its circumference, and a set of centrifugation magnetic block 9 and piezoelectric material 8 have been put to the equipartition in every draw-in groove, centrifugation magnetic block 9 and piezoelectric material 8 are arranged in proper order along the radial from inside to outside interval certain distance of installation shell 7. The inner end of each centrifugal magnet 9 is connected to the inner annular wall of the mounting housing 7 by a spring 12, and the centrifugal magnet 9 is able to hit the piezoelectric material 8 within the travel range of the spring 12. An induction coil 11 which is vertical to the radial direction of the mounting shell 7 is fixedly connected to the inner wall of each clamping groove, the induction coil 11 surrounds the outer part of the centrifugal magnetic block 9, and the centrifugal magnetic block 9 does magnetic induction line motion generated by cutting the induction coil 11 in the process of reciprocating along the radial direction of the mounting shell 7. The piezoelectric materials 8 are connected in parallel through a power supply lead 10.
Preferably, 10 card slots are arranged inside the mounting shell 7.
As shown in fig. 2, the mounting housing 7 rotates with the vehicle transmission shaft 1, and the power supply module 6 generates power in two ways: firstly, the centrifugal magnetic block 9 impacts the piezoelectric material 8 under the action of rotating centrifugal motion and vibration to generate current; secondly, the centrifugal magnetic block 9 is used for cutting the magnetic induction lines by the induction coil 11 to generate current when moving in the radial direction. The generated currents are all output to the energy accumulator 5 through the connecting lead 3.
The connecting wire 3 and the power supply wire 10 are both copper wires made of the same material.
The piezoelectric material 8 is barium titanate or two-dimensional transition metal carbon/nitride (MXene).
The centrifugal magnetic block 9 is a strip magnet with N pole and S pole at two ends.
Fig. 3 is a system circuit diagram of the passive low-power torque sensor. In the embodiment, circuits including the strain gauge 2, the signal processing and low power consumption transmitting module 4, the energy accumulator 5 and the power supply module 6 are connected according to the circuit diagram. The resistors R1 and R2 in the strain gauge 2 and the built-in resistors R3 and R4 of the signal processing and low power consumption transmitting module 4 form a bridge circuit of a Wheatstone bridge; the strain gauge 2 has three leads: the signal output, the signal output and the signal output public end are respectively connected with Sx +, Sx-and AGND of the signal processing and low-power-consumption transmitting module 4; the power generating parts of the power supply module 6 transmit electric energy to the energy accumulator 5 in a parallel connection mode, and the power supply positive and negative electrodes of the energy accumulator 5 are respectively connected with VEXC + and VEXC-of the signal processing and low-power-consumption transmitting module 4.
The working process of the invention is as follows:
during the rotation of a vehicle transmission shaft 1 bearing torque load, based on the electric measurement principle of a Wheatstone bridge circuit, a strain gauge 2 starts to acquire torsional strain signals and outputs the torsional strain signals to a signal processing and low-power-consumption transmitting module 4, and analog voltage signals are transmitted to a signal receiving end through a low-power-consumption wireless transmitter after signal amplification, filtering and analog-to-digital conversion. In the process, the centrifugal magnetic block 9 impacts the piezoelectric material 8 under the action of centrifugal force to generate electricity, the centrifugal magnetic block 9 reciprocates in the induction coil 11 under the action of the spring 12, and the generated electric energy flows into the energy accumulator 5 through the power supply lead 10. The spring 12 also protects the piezoelectric material 8 from impacts. Then, after energy storage and current stabilization, electric energy is supplied to the strain gauge 2 and the signal processing and low power consumption transmitting module 4. In the whole process, as long as the vehicle transmission shaft 1 keeps rotating at a certain speed, the power supply module 6 continuously supplies power to the system and realizes wireless transmission of signals.
The above description is for the best mode of carrying out the invention, but the invention is not limited to the above description, and any other changes, modifications, substitutions, and simplifications that are made under the spirit and principle of the invention are all equivalent substitutions included in the protection scope of the invention.
Claims (6)
1. A passive low-power-consumption torque sensor of a vehicle transmission shaft is arranged on a vehicle transmission shaft (1), and is characterized by comprising a strain gauge (2), a connecting wire (3), a signal processing and low-power-consumption transmitting module (4), an energy accumulator (5) and a power supply module (6);
the strain gauge (2) is adhered to the vehicle transmission shaft (1) along the axis of the vehicle transmission shaft (1); the signal processing and low power consumption transmitting module (4), the energy accumulator (5) and the power supply module (6) are respectively and fixedly connected to a vehicle transmission shaft (1); the signal processing and low power consumption transmitting module (4) and the energy accumulator (5) are wound on the vehicle transmission shaft (1); the strain gauge (2) is connected with the signal processing and transmitting module (4), the signal processing and low-power-consumption transmitting module (4) is connected with the energy accumulator (5), and the energy accumulator (5) is connected with the power supply module (6) through connecting wires (3);
the power supply module (6) comprises an installation shell (7), a piezoelectric material (8), a centrifugal magnetic block (9), a power supply lead (10), an induction coil (11) and a spring (12); installation shell (7) are the ring form, including the semicircle ring of two but split combinations: a first semicircular ring (A) and a second semicircular ring (B); the first semicircular ring (A) and the second semicircular ring (B) are arranged around the vehicle transmission shaft (1) and are fixedly connected to the vehicle transmission shaft (1) through bolts; a plurality of clamping grooves are uniformly formed in the mounting shell (7) along the circumferential direction of the mounting shell, a group of centrifugal magnetic blocks (9) and piezoelectric materials (8) are uniformly arranged in each clamping groove, and the centrifugal magnetic blocks (9) and the piezoelectric materials (8) are sequentially arranged from inside to outside at certain intervals along the radial direction of the mounting shell (7); the inner end of each centrifugal magnetic block (9) is connected with the inner annular wall of the mounting shell (7) through a spring (12), and the centrifugal magnetic blocks (9) can hit the piezoelectric material (8) within the stroke range of the spring (12); an induction coil (11) which is vertical to the radial direction of the mounting shell (7) is fixedly connected to the inner wall of each clamping groove, the induction coil (11) surrounds the outer part of the centrifugal magnetic block (9), and the centrifugal magnetic block (9) performs magnetic induction line motion generated by cutting the induction coil (11) in the process of reciprocating along the radial direction of the mounting shell (7); the piezoelectric materials (8) are connected in parallel through a power supply lead (10).
2. The passive low-power torque sensor of a vehicle propeller shaft according to claim 1, characterized in that the inside of the mounting housing (7) is provided with 10 card slots.
3. The passive low-power-consumption torque sensor of a vehicle transmission shaft according to claim 1, characterized in that the connecting lead (3) and the power supply lead (10) are both copper wires of the same material.
4. The passive low-power torque sensor of a vehicle propeller shaft according to claim 1, characterized in that the piezoelectric material (8) is barium titanate or a two-dimensional transition metal carbo/nitride.
5. The passive low-power-consumption torque sensor of a vehicle transmission shaft according to claim 1, characterized in that the centrifugal magnetic block (9) is an elongated magnet with N and S poles at two ends.
6. The passive low-power torque sensor of a vehicle propeller shaft according to claim 1, characterized in that the signal processing and low-power transmission module (4) comprises a signal processing unit and a low-power signal transmitter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011402460.9A CN112504525B (en) | 2020-12-02 | 2020-12-02 | Passive low-power-consumption torque sensor of vehicle transmission shaft |
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| CN202011402460.9A CN112504525B (en) | 2020-12-02 | 2020-12-02 | Passive low-power-consumption torque sensor of vehicle transmission shaft |
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| CN112504525B CN112504525B (en) | 2024-05-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204716A (en) * | 2021-10-29 | 2022-03-18 | 东风商用车有限公司 | Power supply device for dynamic torque signal acquisition of transmission shaft |
| CN115165177A (en) * | 2022-07-06 | 2022-10-11 | 中机生产力促进中心有限公司 | Belt pulley type wireless torque measurement sensor for rotary shaft system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204716A (en) * | 2021-10-29 | 2022-03-18 | 东风商用车有限公司 | Power supply device for dynamic torque signal acquisition of transmission shaft |
| CN114204716B (en) * | 2021-10-29 | 2022-12-23 | 东风商用车有限公司 | Power supply device for dynamic torque signal acquisition of transmission shaft |
| CN115165177A (en) * | 2022-07-06 | 2022-10-11 | 中机生产力促进中心有限公司 | Belt pulley type wireless torque measurement sensor for rotary shaft system |
| CN115165177B (en) * | 2022-07-06 | 2023-06-20 | 中机生产力促进中心有限公司 | Belt pulley type wireless torque measuring sensor for rotary shaft system |
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| CN112504525B (en) | 2024-05-10 |
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