CN2804805Y - Raster torque sensor - Google Patents
Raster torque sensor Download PDFInfo
- Publication number
- CN2804805Y CN2804805Y CN 200520102749 CN200520102749U CN2804805Y CN 2804805 Y CN2804805 Y CN 2804805Y CN 200520102749 CN200520102749 CN 200520102749 CN 200520102749 U CN200520102749 U CN 200520102749U CN 2804805 Y CN2804805 Y CN 2804805Y
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- grating
- raster
- rotor
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003302 ferromagnetic material Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 description 9
- 238000005259 measurement Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to a raster torque sensor, which comprises a shell body and a base, wherein the center of the shell body is provided with a horizontal rotating shaft; both of the two ends of the rotating shaft are exposed to the shell body; one end of the rotating shaft is connected with a power source, and the other end is connected with a measured load; the shell body is fixed on the base; an asynchronous motor and a sensing element are arranged in the shell body; a rotor of the asynchronous motor is movably sheathed on the rotating shaft; the sensing element comprises two pairs of raster groups and two pairs of photoelectric emission and receiving devices; the raster groups are respectively near to the two sides of the shell body and are composed of a pair of inner and outer raster sheets which are mutually matched with each other; the outer raster sheets are fixed on the rotating shaft, and the inner raster sheets are positioned on the inner side of the outer raster sheets and fixed with the rotor of the asynchronous motor; the photoelectric emission and receiving devices comprise photoelectric emission pipes and photoelectric receiving pipes; the raster groups are arranged between the photoelectric emission pipes and the photoelectric receiving pipes at intervals; the lead ends of the photoelectric receiving pipes are connected with a tester which is arranged on the outside of the utility model. The utility model can measure the rotary torque and the still torque.
Description
(1) technical field
The utility model relates to a kind of sensor, especially a kind of grating torque transducer that comes acquired signal by grating.
(2) background technology
At present, public torque sensor mainly contains two big classes: the first kind is obtained signal (tooth) grid formula torque sensor by magneto-electric induction.The signal of this class sensor output is the angular displacement signal that two-way has phase differential, signal is carried out combined treatment obtain moment information.Its shortcoming is that volume is big, and the not static torque of energy measurement can only be carried out the measurement of static torque and consecutive mean torque.Second largest class is to be the torque sensor of sensitive element with the resistance strain gage.It rotating shaft or with elastic shaft that rotating shaft is connected in series on four precise resistance/strain sheets are installed, and they are connected into the Hui Sidun electric bridge.The distortion of axle can cause that the resistance of foil gauge changes, and electric bridge output signal and torque are proportional.Its shortcoming is that its measuring accuracy and paster technique is closely related, and precision is lower, and overload capacity is less.
(3) summary of the invention
The utility model has overcome present torque sensor can not measure static torque and the torque of quiet (moving) attitude, measuring accuracy is low, overload capacity is little shortcoming simultaneously, provide a kind of measuring accuracy height, simple in structure, can measure the torque sensor of static torque and the torque of quiet (moving) attitude simultaneously.
For this reason, the utility model is taked following technical scheme:
Grating torque transducer includes housing, base, and the center of described housing is provided with a horizontal rotating shaft, and housing is exposed at the two ends of described rotating shaft, and an end connects power source, and the other end connects tested load; Described housing is fixed on the base, also is provided with asynchronous motor and sensing element in the described housing, and the rotor of described asynchronous motor is actively socketed in the described rotating shaft; Described sensing element comprises two pairs of grating groups and two pairs of photoemission receiving traps, described grating group is respectively near the housing both sides, form by a pair of inside and outside lenticular lenses of working in coordination, outer lenticular lenses is fixed in the rotating shaft, and interior lenticular lenses is positioned at outer lenticular lenses inboard and fixes with the rotor of asynchronous motor; Described photoemission receiving trap comprises photoemission cell and photoelectric receiving tube, the described grating group in interval between described photoemission cell, the photoelectric receiving tube, and the exit of described photoemission cell, photoelectric receiving tube is connected with external tester.Further, described rotor adopts ferromagnetic material or cage-type rotor.Further, the two ends of described rotating shaft are thicker than center section.
Employing the utlity model has following advantage: 1, this torque sensor possesses the function of measuring static torque.If an end of rotating shaft links to each other with load, the other end links to each other with power source, make the asynchronous motor deenergization this moment, rotating shaft is rotated under the drive of power source, drive outer lenticular lenses rotation simultaneously, and rotor does not rotate, promptly interior lenticular lenses is not rotated, inside and outside lenticular lenses does relative motion, and can measure quiet, the dynamic torque of motor; End disconnection power source when rotating shaft when the other end connects load, makes the asynchronous motor energized, then rotor begins to rotate, and inboard lenticular lenses is rotated under the drive of rotor, and outside lenticular lenses is transfixion then, so the two does relative motion equally, can measure static torque.That is: torque sensor described in the utility model is a kind of general torque measuring device, both quiet, dynamic torques of energy measurement, the also static torque of energy measurement; 2, adopt the grating acquired signal, thus the precision height, and simple in structure, volume is little, cost is low, higher economic value is arranged.
(4) description of drawings
Fig. 1 is a longitudinal profile of the present utility model structural map
Fig. 2 is for being oscillogram of the present utility model
(5) embodiment
Grating torque transducer includes housing 2, base 8, and the center of described housing is provided with a horizontal rotating shaft 1, and housing is exposed at the two ends of described rotating shaft, and an end connects power source, and the other end connects tested load; Described housing is fixed on the base 8, also is provided with asynchronous motor and sensing element in the described housing, and the rotor 5 of described asynchronous motor is actively socketed in the described rotating shaft; Described sensing element comprises two pairs of grating groups and two pairs of photoemission receiving traps, described grating group is respectively near the housing both sides, form by a pair of inside and outside lenticular lenses of working in coordination respectively, outer lenticular lenses 6 is fixed in the rotating shaft, and it is inboard and fixing with the rotor 5 of asynchronous motor that interior lenticular lenses 7 is positioned at outer lenticular lenses; Described photoemission receiving trap comprises photoemission cell 3 and photoelectric receiving tube 4, the described grating group in interval between described photoemission cell, the photoelectric receiving tube, and the exit of described photoemission cell, photoelectric receiving tube is connected with external tester.The two ends of described rotating shaft are thicker than center section.
One end of rotating shaft 1 connects power source, and the other end connects load.When asynchronous motor was cut off the electricity supply, rotating shaft this moment was rotated under the drive of power source, and the outside lenticular lenses 6 that then links to each other with rotating shaft is rotated under the drive of rotating shaft, and rotor 5 does not rotate, so inboard lenticular lenses 7 transfixions, inside and outside side lenticular lenses does relative motion, and can measure quiet dynamic torque; End disconnection power source when rotating shaft 1 when the other end connects load, makes the asynchronous motor energized, then rotor 5 begins to rotate, and inboard lenticular lenses 7 is rotated under the drive of rotor, and outside lenticular lenses 6 is transfixion then, the two does relative motion equally, can measure static torque.As shown in Figure 2, when inside and outside side lenticular lenses does relative motion, the light that photoemission cell 3 sends by lenticular lenses when retaining time logical, then photoelectric receiving tube 4 receives this light, the time logical when disconnected.When speed of related movement was higher, the AC signal waveform of photoelectric receiving tube output terminal output voltage was sinusoidal wave, and when speed of related movement was low, the AC signal waveform of photoelectric receiving tube output terminal output voltage was a triangular wave.If rotating shaft does not connect load, when promptly rotating shaft did not have strain, waveform A, the B of two pairs of grating group generations had an initial phase difference Q
1, when rotating shaft connection load, i.e. when rotating shaft produced strain, waveform A, the B ' phase shift of two pairs of grating group generations increased to Q
2, there are certain relation in then misplace increment and axial strain moment of torsion angle.The sinusoidal waveform of two pairs of grating group generations is transformed into square wave A through the waveform transformation circuit
*, B
*, then, with B
*The square wave negate after again with A
*Square wave with, output waveform is C.The pulsewidth of C is A
*, B
*The phase differential of two-phase pulse.C
*Be the pairing dislocation increment of bearing axle strain, pulsewidth is σ Q=Q
2-Q
1Pulsewidth σ Q is carried out the high-frequency impulse interpolation, like this, the high-frequency count value M of the phase differential correspondence of the output signal by measuring two pairs of gratings
mJust can measure torque T.
Torque sensor described in the utility model is a kind of general torque measuring device, both quiet, dynamic torques of energy measurement, the static torque of energy measurement again.Compare with the general torque sensor, its precision height, signal are easy to handle, antijamming capability is strong, and simple in structure, and cost is low, and higher economic value is arranged.
Claims (3)
1, grating torque transducer, include housing, base, the center of described housing is provided with a horizontal rotating shaft, housing is exposed at the two ends of described rotating shaft, one end connects power source, and the other end connects tested load, and described housing is fixed on the base, it is characterized in that: also be provided with asynchronous motor and sensing element in the described housing, the rotor of described asynchronous motor is actively socketed in the described rotating shaft; Described sensing element comprises two pairs of grating groups and two pairs of photoemission receiving traps, and near housing two sides, described grating group cooperates with the photoemission receiving trap described grating group respectively;
Described grating group is made up of a pair of inside and outside lenticular lenses of working in coordination respectively, and outer lenticular lenses is fixed in the rotating shaft, and interior lenticular lenses is positioned at outer lenticular lenses inboard and fixes with the rotor of asynchronous motor;
Described photoemission receiving trap comprises photoemission cell and photoelectric receiving tube, the described grating group in interval between described photoemission cell, the photoelectric receiving tube, and the exit of described photoemission cell, photoelectric receiving tube is connected with external tester.
2, grating torque transducer according to claim 1 is characterized in that: described rotor adopts ferromagnetic material or cage-type rotor.
3, grating torque transducer according to claim 1 and 2 is characterized in that: the two ends of described rotating shaft are thicker than center section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520102749 CN2804805Y (en) | 2005-06-07 | 2005-06-07 | Raster torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520102749 CN2804805Y (en) | 2005-06-07 | 2005-06-07 | Raster torque sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2804805Y true CN2804805Y (en) | 2006-08-09 |
Family
ID=36910094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520102749 Expired - Lifetime CN2804805Y (en) | 2005-06-07 | 2005-06-07 | Raster torque sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2804805Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387955C (en) * | 2005-06-07 | 2008-05-14 | 浙江工业大学 | Grating torque transducer |
| CN108593169A (en) * | 2018-04-19 | 2018-09-28 | 哈尔滨工业大学 | Rotary wind type Mars unmanned plane single rotor system gas dynamic characteristic test device and torsion-testing method and lift test method |
-
2005
- 2005-06-07 CN CN 200520102749 patent/CN2804805Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387955C (en) * | 2005-06-07 | 2008-05-14 | 浙江工业大学 | Grating torque transducer |
| CN108593169A (en) * | 2018-04-19 | 2018-09-28 | 哈尔滨工业大学 | Rotary wind type Mars unmanned plane single rotor system gas dynamic characteristic test device and torsion-testing method and lift test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080514 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080514 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |