CN112504525B - 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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- CN112504525B CN112504525B CN202011402460.9A CN202011402460A CN112504525B CN 112504525 B CN112504525 B CN 112504525B CN 202011402460 A CN202011402460 A CN 202011402460A CN 112504525 B CN112504525 B CN 112504525B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 30
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- 230000006698 induction Effects 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 16
- 230000033001 locomotion Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 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
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 229910052723 transition metal Inorganic materials 0.000 claims description 3
- 150000003624 transition metals Chemical class 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 12
- 230000008054 signal transmission Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract description 4
- 238000001228 spectrum Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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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
-
- 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
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
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 a mounting shell, piezoelectric materials, a centrifugal magnetic block, a power supply lead, an induction coil and a spring; the installation shell rotates along with the transmission shaft of the vehicle, and two power generation modes of the power supply module are adopted: firstly, the piezoelectric material is impacted to generate current under the action of rotary centrifugal motion and vibration through a centrifugal magnetic block; and secondly, the centrifugal magnetic block is utilized to cut the magnetic induction wire by the induction coil to generate current when in radial motion. The invention realizes passive power supply, signal wireless emission and low-energy consumption signal transmission of the torque sensor, and can acquire torque signals for a long time; the test device meets the requirements of axle parts in vehicles such as automobiles, tractors and the like, and provides a guarantee for long-time acquisition and long-term fault monitoring of the load spectrum of the transmission shaft of the vehicle under the condition of especially facing to the 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 of a vehicle transmission shaft.
Background
The torque sensor is widely applied to reliability and durability tests in the vehicle fields of automobiles, tractors, engineering vehicles and the like. The vehicle drive shaft torque test has two main purposes: firstly, researching the power characteristics of the vehicle, such as acceleration performance, climbing performance, power matching and the like; and secondly, the method is applied to a road load spectrum acquisition test and a bench fatigue test to study the fatigue durability of the vehicle.
According to the test principle, the torque sensor can be divided into strain type, rotation angle phase difference type, magnetoelectric type and the like. The strain type torque sensor is the most mature technology at home and abroad and is the most widely applied. With the development of new technologies, new torque sensors such as an optical fiber type, a wireless passive Surface Acoustic Wave (SAW) type, and a laser doppler type have been developed in recent years.
However, torque sensors still have problems in terms of power supply and wireless signal transmission.
The domestic wireless torque sensor is mostly powered by a battery, the power consumption of the signal transmitter is high, and the wireless torque sensor is large in size and inconvenient to install; the rechargeable torque sensor has short power supply time and is not suitable for long-time testing. Foreign sensor products comprise slip rings and wireless telemetering type torque sensors, and the slip rings and the torque sensors influence service life and measurement accuracy due to abrasion and heating between conductive slip rings and carbon brushes. Besides the mode, the power supply mode of the rotary transformer has high requirements on the use and installation of the field environment; the radio frequency coupling mode 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, china patent application (application number: 201210118608.5) discloses a strain type wireless sensor, and a perfect solution of a torque-rotating speed testing system is provided, but the problem of passive power supply is not solved, the power consumption of a communication module is relatively high, and long-time testing cannot be completed. In consideration of the problems of power supply, wireless transmission and the like of the torque sensor, no suitable product in China can meet the requirements of long-time data acquisition and power system fault monitoring of non-road vehicles such as tractors and the like under severe field operation.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide the passive low-power-consumption torque sensor of the vehicle transmission shaft, which can meet the requirements of testing shaft parts in vehicles such as automobiles, tractors and the like, solve the problems of power supply, low-power-consumption wireless transmission and long-time test of the sensor, and particularly provide powerful tools for collecting the field operation load spectrum and monitoring faults of the tractors.
In order to achieve the above object, the present invention provides the following technical solutions:
A passive low-power-consumption torque sensor of a vehicle transmission shaft is arranged on the vehicle transmission shaft 1 and comprises a strain gauge 2, a connecting lead 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 stuck on 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 fixedly connected to the vehicle transmission shaft 1 respectively; 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 lead 3.
The power supply module 6 comprises a mounting shell 7, piezoelectric materials 8, a centrifugal magnetic block 9, a power wire 10, an induction coil 11 and a spring 12; the installation shell 7 is annular, and comprises two detachable combined semicircular rings: 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 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 annular wall of the mounting shell 7 through a spring 12, and the centrifugal magnetic blocks 9 can strike the piezoelectric material 8 in the stroke range of the spring 12; an induction coil 11 which is vertical to the radial direction of the installation shell 7 is fixedly connected on the inner wall of each clamping groove, the induction coil 11 surrounds the outside of the centrifugal magnetic block 9, and the centrifugal magnetic block 9 performs magnetic induction line movement generated by cutting the induction coil 11 in the radial reciprocating movement process of the installation shell 7; the piezoelectric materials 8 are connected in parallel through a power wire 10.
10 Clamping grooves are formed in the mounting shell 7.
The connecting wire 3 and the power wire 10 are copper wires made of the same material.
The piezoelectric material 8 is barium titanate or two-dimensional transition metal carbo/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 mode of power generation by combining piezoelectric material, centrifugal magnetic block and spring is adopted, centrifugal force and vibration of the rotation of the vehicle transmission shaft under complex working conditions are fully utilized, and the passive power supply of the torque sensor is realized. Meanwhile, the spring buffers the motion of the centrifugal magnetic block, so that the power supply process is stable, and the damage of piezoelectric materials is avoided.
2. The piezoelectric materials are distributed in groups and are connected in parallel, the space arrangement is more compact, the defect of high voltage and low current is overcome, and the power supply requirement of the torque sensor is met.
3. The novel power supply transmission mode of the power supply module, the energy accumulator and the low-power-consumption transmitter is provided, wireless transmission of signals is realized, electric energy is quantitatively stored, impact of pulse current is buffered, electric quantity consumption of a system is reduced to the minimum, and a signal transmission process is more stable.
4. The problem that the traditional commercial torque sensor is limited in testing scene due to factors such as power supply, wired transmission and the like is fundamentally solved, and long-time testing of the torque sensor on a vehicle transmission shaft is realized.
Drawings
Fig. 1 is a schematic view of the installation of the torque sensor of the present invention on a vehicle propeller shaft 1;
FIG. 2 is a schematic cross-sectional view of a power 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 as follows:
1. Vehicle drive shaft 2 strain gauge
3. Signal processing and low-power consumption transmitting module for connecting lead 4
5. Accumulator 6 power supply module
7. Piezoelectric material for mounting case 8
9. Power supply wire of centrifugal magnetic block 10
11. Induction coil 12 spring
A first semicircle B second semicircle
Detailed Description
The invention will be further described with reference to the drawings 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 fixedly connected to the vehicle transmission shaft 1 respectively. 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 lead 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 a role in 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, an eccentric magnetic block 9, a power supply wire 10, an induction coil 11, and a spring 12. The installation shell 7 is annular, and comprises two detachable combined semicircular rings: a first semicircle A and a second semicircle B. The first semicircular ring A and the second semicircular ring B are arranged around the vehicle transmission shaft 1 and are connected to the vehicle transmission shaft 1 through bolt fastening. Inside of the installation shell 7 is uniformly provided with a plurality of clamping grooves along the circumferential direction of the installation shell, a group of centrifugal magnetic blocks 9 and piezoelectric materials 8 are 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 installation shell 7. The inner end of each centrifugal magnetic block 9 is connected with the inner annular wall of the mounting housing 7 through a spring 12, and the centrifugal magnetic blocks 9 can strike the piezoelectric material 8 in the stroke range of the spring 12. An induction coil 11 which is vertical to the radial direction of the installation shell 7 is fixedly connected on the inner wall of each clamping groove, the induction coil 11 surrounds the outside of the centrifugal magnetic block 9, and the centrifugal magnetic block 9 performs magnetic induction line movement generated by cutting the induction coil 11 in the radial reciprocating movement process of the installation shell 7. The piezoelectric materials 8 are connected in parallel through a power wire 10.
Preferably, 10 clamping grooves are formed in the mounting housing 7.
As shown in fig. 2, the installation housing 7 rotates with the vehicle transmission shaft 1, and the power generation modes of the power supply module 6 are two modes: firstly, the piezoelectric material 8 is impacted to generate current under the action of rotary centrifugal motion and vibration through the centrifugal magnetic block 9; and secondly, the centrifugal magnetic block 9 is utilized to cut the magnetic induction line by the induction coil 11 to generate current when in radial movement. The above generated currents are all output to the accumulator 5 through the connection wire 3.
The connecting wire 3 and the power wire 10 are 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.
As shown in fig. 3, a system circuit diagram of a passive low power torque sensor is shown. In this embodiment, the circuits including the strain gauge 2, the signal processing and low power consumption transmitting module 4, the accumulator 5, and the power supply module 6 are all connected according to this circuit diagram. Resistors R1 and R2 in the strain gauge 2 and 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 shares three paths of leads: the signal output+, signal output-and signal output public end is respectively connected with Sx+, sx-and AGND of the signal processing and low-power consumption transmitting module 4; the power generation parts of the power supply module 6 transmit electric energy to the energy accumulator 5 in a parallel connection mode, and the power supply anode and cathode 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 the vehicle transmission shaft 1 bearing the torque load, based on the electrical measurement principle of the Wheatstone bridge, the strain gauge 2 starts to collect the torsion strain signal and transmits the torsion strain signal to the signal processing and low-power consumption transmitting module 4, and the analog voltage signal is transmitted to the signal receiving end through the low-power consumption wireless transmitter after signal amplification, filtering and analog-to-digital conversion. In this process, the centrifugal magnetic block 9 hits the piezoelectric material 8 to generate electricity under the action of centrifugal force, and 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 accumulator 5 through the power supply wire 10. The spring 12 also protects the piezoelectric material 8 from impact. Then, after energy storage and steady flow, 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 can continuously supply power to the system, and wireless transmission of signals is realized.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather as merely providing for the purpose of teaching herein before set forth in the appended claims.
Claims (4)
1. The passive low-power-consumption torque sensor of the vehicle transmission shaft is arranged on the vehicle transmission shaft (1) and is characterized by comprising a strain gauge (2), a connecting lead (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 stuck on 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 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 low-power-consumption 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 lead (3);
The power supply module (6) comprises a mounting shell (7), piezoelectric materials (8), a centrifugal magnetic block (9), a power supply lead (10), an induction coil (11) and a spring (12); the installation shell (7) is in a ring shape and comprises two detachable combined semicircular rings: 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 connected to the vehicle transmission shaft (1) through bolt fastening; 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 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 annular wall of the mounting shell (7) through a spring (12), and the centrifugal magnetic blocks (9) can strike the piezoelectric material (8) in the stroke range of the spring (12); an induction coil (11) which is vertical to the radial direction of the installation shell (7) is fixedly connected on the inner wall of each clamping groove, the induction coil (11) surrounds the outside of the centrifugal magnetic block (9), and the centrifugal magnetic block (9) performs magnetic induction line movement generated by cutting the induction coil (11) in the radial reciprocating movement process along the installation shell (7); the piezoelectric materials (8) are connected in parallel through power leads (10);
10 clamping grooves are formed in the mounting shell (7);
The connecting wire (3) and the power wire (10) are copper wire wires made of the same material.
2. A passive low power consumption torque sensor for a vehicle propeller shaft according to claim 1, characterized in that the piezoelectric material (8) is barium titanate or two-dimensional transition metal carbo/nitride.
3. 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 two ends of N pole and S pole respectively.
4. The passive low power torque sensor of a vehicle propeller shaft of claim 1, wherein the signal processing and low power transmitting 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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| 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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| CN112504525B true CN112504525B (en) | 2024-05-10 |
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| 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 |
| 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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