CN103278274B - Capacitive coupling-based rotating part torque testing device - Google Patents
Capacitive coupling-based rotating part torque testing device Download PDFInfo
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- CN103278274B CN103278274B CN201310144371.2A CN201310144371A CN103278274B CN 103278274 B CN103278274 B CN 103278274B CN 201310144371 A CN201310144371 A CN 201310144371A CN 103278274 B CN103278274 B CN 103278274B
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Abstract
The invention relates to the rotary part torque testing field of power mechanical devices, in particular to a capacitive coupling-based rotating part torque testing device. The capacitive coupling-based rotating part torque testing device comprises a first sensing element which is bonded to the to-be-tested part of a rotating part in the power mechanical device, and a second sensing element which is arranged in the power mechanical device. The structure and the principle of the capacitive coupling-based rotating part torque testing device disclosed by the invention are different from the structure and the principle for reflecting the torque by utilizing the bridge voltage output of the conventional construction electrical bridge, and are also different form the structure and the principle for solving the torque by utilizing a phase difference in the conventional two groups of capacitive grids, magnetic grids and optical grids. According to the torque testing device disclosed by the invention, not the construction electrical bridge but only one group of capacitance plate is required, and the torque testing is realized by detecting torque information acquired by the first sensing element and the second sensing element by a circuit through capacitive coupling.
Description
Technical field
The present invention relates to the revolving part torsion-testing field of motive power machine device, specifically a kind of based on capacity coupled revolving part torsion-testing apparatus.
Background technology
Moment of torsion is the important parameter characterizing the transmission shaft of the motive power machine device such as vehicle, naval vessel, bogie wheel, gear, connecting rod rotary member power.Torsion-testing is divided into contact method and eyes with non-contact method according to transmission mode, wherein contact method mainly resistance strain gage structure direct current bridge, electric brush type collector ring is adopted to power, but it is excessive owing to vibrating, make brush loose contact and cause signal fluctuation, causing measuring error greatly even to measure the problems such as unsuccessful; Eyes with non-contact method mainly utilizes based on magnetoelasticity formula, magneto-electric and electro-optical pickoff, and the signal wireless transmission of wireless telemetering, and due to the spaces compact of vehicle revolving part, the rugged surroundings such as greasy dirt, dust, exist the problems such as poor reliability; In addition, existing a kind of torque of rotating shaft test based on holding grid needs to assemble two groups at the two ends that the spacing of an axle is L and holds grid, due to the turning axle limited length of vehicle, and assembling difficulty, limited in the torque of rotating shaft test applications of vehicle.
Summary of the invention
The problems that the present invention exists to solve existing revolving part torsion-testing, provide a kind of based on capacity coupled revolving part torsion-testing apparatus.
The present invention is achieved by the following technical solutions: one, based on capacity coupled revolving part torsion-testing apparatus, comprises the first sensing element being pasted on the tested position of revolving part in motive power machine device, is located at the second sensing element in motive power machine device,
The first described sensing element is made up of resistance strain gage Ra and resistance strain gage Rb, resistance strain gage Ra and resistance strain gage Rb one end are connected on revolving part respectively by lead-in wire, revolving part ground connection, the mutual alignment relation of resistance strain gage Ra and resistance strain gage Rb ensures that rotating each resistance strain gage with revolving part produces deformation;
The second described sensing element is by dynamic support member, quiet support member, is located at the movable plate electrode on dynamic support member and the static plate electrode be located on quiet support member is formed, movable plate electrode is made up of movable plate electrode A sheet and movable plate electrode B sheet, and static plate electrode is made up of static plate electrode A sheet and static plate electrode B sheet; Described dynamic support member fixed cover is loaded on revolving part rotary motion on revolving part, mutually insulated between movable plate electrode A sheet and movable plate electrode B sheet; Described quiet support member is located on revolving part and is supported in motive power machine device, mutually insulated between static plate electrode A sheet and static plate electrode B sheet; Opposite face is had between described dynamic support member and quiet support member, and movable plate electrode and static plate electrode are installed on the opposite face of each support member respectively, the shape controlling static plate electrode A sheet of movable plate electrode and static plate electrode and the movable plate electrode A sheet rotated with revolving part formed go round and begin again change from small to big, electric capacity C1a from large to small, with the movable plate electrode B sheet rotated with revolving part formed go round and begin again from large to small, the electric capacity C1b that changes from small to big; In like manner, static plate electrode B sheet and the movable plate electrode A sheet rotated with revolving part formed go round and begin again from large to small, the electric capacity C2a that changes from small to big, with the movable plate electrode B sheet rotated with revolving part formed go round and begin again change from small to big, electric capacity C2b from large to small; Movable plate electrode A sheet is connected with the other end of resistance strain gage Ra by lead-in wire, and movable plate electrode B sheet is connected with the other end of resistance strain gage Rb by lead-in wire; Static plate electrode A sheet is by lead-in wire output signal, and static plate electrode B sheet is by lead-in wire output signal.
As long as each resistance strain gage rotates can produce torsional deformation with revolving part in theory, resistance strain gage Ra and resistance strain gage Rb relative position relation all can adopt.According to the mechanics of materials, when the bus of resistance strain gage and revolving part is 45 °, strain maximum.The mounting structure (see figure 4) of the resistance strain gage that those skilled in the art's routine adopts is: resistance strain gage Ra and resistance strain gage Rb is positioned at the same longitudinal section of revolving part, and the bus of resistance strain gage Ra and revolving part is 45° angle, resistance strain gage Rb and this bus are-45° angle.
The circuit that proving installation of the present invention is formed, as shown in Figure 5.
Further, described dynamic support member is moving sleeve, and quiet support member is quiet sleeve.Described supporting piece structure is structure known in this field, and tube-in-tube structure is the supporting piece structure that this area routine adopts.
Further, the opposite face of described moving sleeve and quiet sleeve is end face, and movable plate electrode and static plate electrode are pasted on end face respectively.As long as can be formed in theory go round and begin again change from small to big, electric capacity C1a, C1b, C2a and C2b from large to small, adopt the Arbitrary Relative face mode of moving sleeve and quiet sleeve, but the mounting means of above-mentioned moving sleeve, quiet sleeve, movable plate electrode and static plate electrode, has the features such as little, the simple and good environmental adaptability of volume.
Further, described movable plate electrode B sheet comprises ring body and is evenly connected to the some fan annulars on ring body, and movable plate electrode A sheet and movable plate electrode B sheet are complementary structure (see figure 2); In like manner described static plate electrode A sheet and static plate electrode B sheet (see figure 3).As long as can be formed in theory go round and begin again change from small to big, electric capacity C1a, C1b, C2a and C2b from large to small, movable plate electrode A sheet, movable plate electrode B sheet, static plate electrode A sheet, static plate electrode B sheet adopt any known shape all can, but above-mentioned movable plate electrode A sheet, movable plate electrode B sheet, static plate electrode A sheet, static plate electrode B sheet are this area carry out torque measurement have capacitance signal clearly, clearly feature.
Of the present invention based on capacity coupled revolving part torsion-testing method (device using method), the lead-in wire of the lead-in wire of static plate electrode A sheet and static plate electrode B sheet is accessed capacitive detection circuit.Described capacitive detection circuit is test circuit known in this field, and those skilled in the art's routine adopts pulse-width modulation circuit, bridge diagram, testing impedance circuit etc.Adopt method of testing of the present invention, the electric capacity utilizing two resistance strain gages and one group of capacitor plate (being made up of movable plate electrode and static plate electrode) to be formed intercouples and realizes revolving part torsion-testing, concrete principle is as follows: revolving part loads moment of torsion and causes distortion, be pasted onto two resistance strain gage change in resistance on revolving part, cause the change of capacitor charge and discharge time, cause the change of rear class test circuit (such as: differential pulse width modulation circuit) waveform duty cycle, through known difference subtraction circuit, the change of waveform duty cycle is converted to similar sinusoidal signal by low-pass filter circuit, and the voltage magnitude reflected waveform dutycycle of similar sinusoidal signal, the frequency of sinusoidal signal is relevant to rotating speed, and because moment of torsion is a tempolabile signal, its change frequency is less than sinusoidal wave frequency, and namely the envelope of sinusoidal signal reflects torque information, as shown in Figure 8.
In addition, of the present invention based on capacity coupled revolving part torsion-testing method (device using method), the lead-in wire of the lead-in wire of static plate electrode A sheet and static plate electrode B sheet is carried out short circuit, movable plate electrode A sheet and static plate electrode form fixed capacity Ca, movable plate electrode B sheet and static plate electrode form fixed capacity Cb, incoming transport constant current source in the circuit that this proving installation is formed, concrete principle is: revolving part loads moment of torsion and causes distortion, be pasted onto two resistance strain gage change in resistance on revolving part, thus cause the complex impedance of electric capacity and resistance to change, complex impedance is utilized to calculate torque information, Fig. 6 is shown in by its circuit diagram.
Structure based on capacity coupled revolving part torsion-testing apparatus of the present invention and principle are different from existing structure electric bridge and utilize bridge to press structure and the principle of output reflection moment of torsion, also being different from existing two groups of appearance grid, magnetic grid, gratings utilizes phase differential to resolve structure and the principle of moment of torsion, torsion-testing apparatus of the present invention is without the need to building electric bridge, only need one group of capacitor plate, pass through capacitive coupling, the torque information first sensing element and the second sensing element obtained, by electric circuit inspection, realizes the test of moment of torsion.
Accompanying drawing explanation
Fig. 1 is the structural representation based on capacity coupled revolving part torsion-testing apparatus of the present invention.
Fig. 2 is the structural representation of movable plate electrode.
Fig. 3 is the structural representation of static plate electrode.
Fig. 4 is the structural representation of resistance strain gage Ra and Rb.
Fig. 5 is the circuit diagram that proving installation of the present invention is formed.
Fig. 6 is the circuit diagram that after incoming transport constant current source, proving installation of the present invention is formed.
Fig. 7 is the circuit diagram that after access differential pulse width modulation circuit, proving installation of the present invention is formed.
Fig. 8 is the relation schematic diagram of sinusoidal signal and envelope after access differential pulse width modulation circuit.
Fig. 9 is
the emulation schematic diagram of the change in duty cycle of oscillogram.
In figure: 1-revolving part, 2a, 2b-go between, 3a-resistance strain gage Ra, 3b-resistance strain gage Rb, 4a, 4b-go between, and 6-moves support member, the quiet support member of 7-, and 8a, 8b-go between, 9a-movable plate electrode A sheet, 9b-movable plate electrode B sheet, 10a-static plate electrode A sheet, 10b-static plate electrode B sheet.
Embodiment
In order to device of the present invention is described better, further elaboration is done to its method of testing.
embodiment 1
One, based on capacity coupled revolving part torsion-testing apparatus, comprises the first sensing element being pasted on the tested position of revolving part 1 in motive power machine device, is located at the second sensing element in motive power machine device,
The first described sensing element is made up of resistance strain gage Ra3a and resistance strain gage Rb3b, resistance strain gage Ra3a and resistance strain gage Rb3b one end are connected on revolving part 1 respectively by lead-in wire 2a, 2b, revolving part 1 ground connection, the mutual alignment relation of resistance strain gage Ra3a and resistance strain gage Rb3b ensures that rotating each resistance strain gage with revolving part 1 produces torsional deformation;
The second described sensing element is by dynamic support member 6, quiet support member 7, is located at the movable plate electrode on dynamic support member 6 and the static plate electrode be located on quiet support member 7 is formed, movable plate electrode is made up of movable plate electrode A sheet 9a and movable plate electrode B sheet 9b, and static plate electrode is made up of static plate electrode A sheet 10a and static plate electrode B sheet 10b; Described dynamic support member 6 fixed cover is loaded on revolving part 1 rotary motion on revolving part 1, mutually insulated between movable plate electrode A sheet 9a and movable plate electrode B sheet 9b; Described quiet support member 7 is located on revolving part 1 and is supported in motive power machine device, mutually insulated between static plate electrode A sheet 10a and static plate electrode B sheet 10b; Opposite face is had between described dynamic support member 6 and quiet support member 7, and movable plate electrode and static plate electrode are installed on the opposite face of each support member respectively, the shape controlling static plate electrode A sheet 10a of movable plate electrode and static plate electrode and the movable plate electrode A sheet 9a rotated with revolving part 1 formed go round and begin again change from small to big, electric capacity C1a from large to small, with the movable plate electrode B sheet 9b rotated with revolving part 1 formed go round and begin again from large to small, the electric capacity C1b that changes from small to big; In like manner, static plate electrode B sheet 10b and the movable plate electrode A sheet 9a rotated with revolving part 1 formed go round and begin again from large to small, the electric capacity C2a that changes from small to big, with the movable plate electrode B sheet 9b rotated with revolving part 1 formed go round and begin again change from small to big, electric capacity C2b from large to small; Movable plate electrode A sheet 9a is connected with the other end of resistance strain gage Ra3a by lead-in wire 4a, and movable plate electrode B sheet 9b is connected with the other end of resistance strain gage Rb3b by lead-in wire 4b; Static plate electrode A sheet 10a is by lead-in wire 8a output signal, and static plate electrode B sheet 10b is by lead-in wire 8b output signal.
The opposite face of described moving sleeve and quiet sleeve is end face.Described movable plate electrode B sheet 9b comprises ring body and is evenly connected to the some fan annulars on ring body, and movable plate electrode A sheet 9a and movable plate electrode B sheet 9b is complementary structure; In like manner described static plate electrode A sheet 10a and static plate electrode B sheet 10b.During concrete use, under guarantee movable plate electrode and the discontiguous situation of static plate electrode, the spacing of movable plate electrode and static plate electrode is little as far as possible, makes the capacitance of electric capacity be beneficial to as far as possible greatly late-class circuit test.
Of the present inventionly to complete in above-mentioned proving installation based on capacity coupled revolving part torsion-testing method, the lead-in wire 8b of the lead-in wire 8a of static plate electrode A sheet 10a and static plate electrode B sheet 10b is accessed capacitive detection circuit.
In order to method of testing of the present invention is better described, the lead-in wire 8b of the lead-in wire 8a of static plate electrode A sheet 10a and static plate electrode B sheet 10b is accessed in differential pulse width modulation circuit, sees Fig. 7.
(1) in order to convenient simulation, suppose that the shape of movable plate electrode and static plate electrode is completely the same, i.e. C1a=C2b, C1b=C2a, and the capacitance of holding capacitor C1a, C1b, C2a, C2b immobilizes (being equivalent to the point sometime in electric capacity dynamic change), change the resistance R(a of resistance strain gage Ra3a) and the resistance R(b of resistance strain gage Rb3b)
waveform and dutycycle as shown in Figure 9, namely resistance strain gage Ra3a and Rb3b obtain torque information can be converted to by capacitive coupling
the change of dutycycle, detected the test that can realize moment of torsion by late-class circuit.
(2) in order to convenient simulation, suppose that the shape of movable plate electrode and static plate electrode is completely the same, i.e. C1a=C2b, C1b=C2a, and keep the resistance R(a of resistance strain gage) and R(b) constant, change the capacitance of electric capacity C1a, C1b, C2a, C2b,
waveform and dutycycle as shown in Figure 9, namely along with the rotation of revolving part 1, each electric capacity presents cyclical variation,
dutycycle there is cyclical variation, utilize late-class circuit---differential pulse width modulation circuit process, can form periodic signal, realizes the test of moment of torsion.
embodiment 2
One, based on capacity coupled revolving part torsion-testing apparatus, comprises the first sensing element being pasted on the tested position of revolving part 1 in motive power machine device, is located at the second sensing element in motive power machine device,
The first described sensing element is made up of resistance strain gage Ra3a and resistance strain gage Rb3b, resistance strain gage Ra3a and resistance strain gage Rb3b one end are connected on revolving part 1 respectively by lead-in wire 2a, 2b, revolving part 1 ground connection, the mutual alignment relation of resistance strain gage Ra3a and resistance strain gage Rb3b ensures that rotating each resistance strain gage with revolving part 1 produces torsional deformation;
The second described sensing element is by dynamic support member 6, quiet support member 7, is located at the movable plate electrode on dynamic support member 6 and the static plate electrode be located on quiet support member 7 is formed, movable plate electrode is made up of movable plate electrode A sheet 9a and movable plate electrode B sheet 9b, and static plate electrode is made up of static plate electrode A sheet 10a and static plate electrode B sheet 10b; Described dynamic support member 6 fixed cover is loaded on revolving part 1 rotary motion on revolving part 1, mutually insulated between movable plate electrode A sheet 9a and movable plate electrode B sheet 9b; Described quiet support member 7 is located on revolving part 1 and is supported in motive power machine device, mutually insulated between static plate electrode A sheet 10a and static plate electrode B sheet 10b; Opposite face is had between described dynamic support member 6 and quiet support member 7, and movable plate electrode and static plate electrode are installed on the opposite face of each support member respectively, the shape controlling static plate electrode A sheet 10a of movable plate electrode and static plate electrode and the movable plate electrode A sheet 9a rotated with revolving part 1 formed go round and begin again change from small to big, electric capacity C1a from large to small, with the movable plate electrode B sheet 9b rotated with revolving part 1 formed go round and begin again from large to small, the electric capacity C1b that changes from small to big; In like manner, static plate electrode B sheet 10b and the movable plate electrode A sheet 9a rotated with revolving part 1 formed go round and begin again from large to small, the electric capacity C2a that changes from small to big, with the movable plate electrode B sheet 9b rotated with revolving part 1 formed go round and begin again change from small to big, electric capacity C2b from large to small; Movable plate electrode A sheet 9a is connected with the other end of resistance strain gage Ra3a by lead-in wire 4a, and movable plate electrode B sheet 9b is connected with the other end of resistance strain gage Rb3b by lead-in wire 4b; Static plate electrode A sheet 10a is by lead-in wire 8a output signal, and static plate electrode B sheet 10b is by lead-in wire 8b output signal.
Described dynamic support member 6 is moving sleeve, and quiet support member 7 is quiet sleeve.Described opposite face is the medial surface of the lateral surface of quiet sleeve, moving sleeve respectively.During concrete use, described quiet sleeve set is outside moving sleeve, and movable plate electrode is bonded on moving sleeve lateral surface, and static plate electrode is bonded on quiet sleeve medial surface, and movable plate electrode B sheet 9b is strip shaped electric poles group along the circumferencial direction of moving sleeve, movable plate electrode A sheet 9a and movable plate electrode B sheet 9b is complementary structure; In like manner described static plate electrode A sheet 10a and static plate electrode B sheet 10b.The shape of movable plate electrode and static plate electrode is the structure of moving grid and fixed grid in 200810054537.0 see the patent No..
Of the present invention based on capacity coupled revolving part torsion-testing method, complete in above-mentioned proving installation, the lead-in wire 8b of the lead-in wire 8a of static plate electrode A sheet 10a and static plate electrode B sheet 10b is carried out short circuit, movable plate electrode A sheet 9a and static plate electrode form fixed capacity Ca, movable plate electrode B sheet 9b and static plate electrode form fixed capacity Cb, incoming transport constant current source in the circuit that this proving installation is formed.
Along with the rotation of revolving part, the resistance R(a of resistance strain gage Ra3a and resistance strain gage Rb3b) and R(b) change, the capacitance of fixed capacity Ca, Cb and R(a) and R(b) complex impedance change, detect voltage U change, namely realize the measurement of moment of torsion.
Claims (4)
1. based on a capacity coupled revolving part torsion-testing apparatus, it is characterized in that, comprise the first sensing element being pasted on revolving part in motive power machine device (1) tested position, be located at the second sensing element in motive power machine device,
The first described sensing element is by resistance strain gage Ra(3a) and resistance strain gage Rb(3b) form, resistance strain gage Ra(3a) and resistance strain gage Rb(3b) one end respectively by lead-in wire (2a, 2b) be connected on revolving part (1), revolving part (1) ground connection, resistance strain gage Ra(3a) and resistance strain gage Rb(3b) mutual alignment relation ensure that rotating each resistance strain gage with revolving part (1) produces deformation;
The second described sensing element is by dynamic support member (6), quiet support member (7), is located at the movable plate electrode on dynamic support member (6) and the static plate electrode be located on quiet support member (7) is formed, movable plate electrode is made up of movable plate electrode A sheet (9a) and movable plate electrode B sheet (9b), and static plate electrode is made up of static plate electrode A sheet (10a) and static plate electrode B sheet (10b); Described dynamic support member (6) fixed cover is loaded on revolving part (1) rotary motion on revolving part (1), mutually insulated between movable plate electrode A sheet (9a) and movable plate electrode B sheet (9b); Described quiet support member (7) is located on revolving part (1) and is supported in motive power machine device, mutually insulated between static plate electrode A sheet (10a) and static plate electrode B sheet (10b); Opposite face is had between described dynamic support member (6) and quiet support member (7), and movable plate electrode and static plate electrode are installed on the opposite face of each support member respectively, shape controlling static plate electrode A sheet (10a) of movable plate electrode and static plate electrode and the movable plate electrode A sheet (9a) rotated with revolving part (1) formed go round and begin again change from small to big, electric capacity C1a from large to small, with the movable plate electrode B sheet (9b) rotated with revolving part (1) formed go round and begin again from large to small, the electric capacity C1b that changes from small to big; In like manner, static plate electrode B sheet (10b) and the movable plate electrode A sheet (9a) rotated with revolving part (1) formed go round and begin again from large to small, the electric capacity C2a that changes from small to big, with the movable plate electrode B sheet (9b) rotated with revolving part (1) formed go round and begin again change from small to big, electric capacity C2b from large to small; Movable plate electrode A sheet (9a) by first lead-in wire (4a) and resistance strain gage Ra(3a) the other end be connected, movable plate electrode B sheet (9b) by second go between (4b) and resistance strain gage Rb(3b) the other end be connected; Static plate electrode A sheet (10a) is by the 3rd lead-in wire (8a) output signal, and static plate electrode B sheet (10b) is by the 4th lead-in wire (8b) output signal.
2. according to claim 1ly it is characterized in that based on capacity coupled revolving part torsion-testing apparatus, described dynamic support member (6) is moving sleeve, and quiet support member (7) is quiet sleeve.
3. according to claim 2ly it is characterized in that based on capacity coupled revolving part torsion-testing apparatus, the opposite face of described moving sleeve and quiet sleeve is end face.
4. according to claim 3 based on capacity coupled revolving part torsion-testing apparatus, it is characterized in that, described movable plate electrode B sheet (9b) comprises ring body and is evenly connected to the some fan annulars on ring body, and movable plate electrode A sheet (9a) and movable plate electrode B sheet (9b) are in complementary structure; In like manner described static plate electrode A sheet (10a) and static plate electrode B sheet (10b).
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| CN201310144371.2A CN103278274B (en) | 2013-04-24 | 2013-04-24 | Capacitive coupling-based rotating part torque testing device |
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| CN201310144371.2A CN103278274B (en) | 2013-04-24 | 2013-04-24 | Capacitive coupling-based rotating part torque testing device |
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| CN103278274B true CN103278274B (en) | 2015-01-14 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3035712B1 (en) | 2015-04-30 | 2018-07-06 | Continental Automotive France | TORQUE MEASUREMENT DEVICE APPLIED TO ROTARY SHAFT AND ASSOCIATED TORQUE MEASUREMENT METHOD |
| CN105043618B (en) * | 2015-08-11 | 2017-08-08 | 电子科技大学 | A kind of electric capacity torque sensor |
| CN106225964B (en) * | 2016-07-28 | 2019-03-15 | 中北大学 | A kind of contactless torque test device that thin sheet of metal ring is merged with bearing |
| CN114234781B (en) * | 2021-12-07 | 2023-08-22 | 中北大学 | Capacitive grating displacement testing device for fusing information sensing and tested part |
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