CN1825077A - Laser diffraction torque meter - Google Patents
Laser diffraction torque meter Download PDFInfo
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- CN1825077A CN1825077A CN 200610039322 CN200610039322A CN1825077A CN 1825077 A CN1825077 A CN 1825077A CN 200610039322 CN200610039322 CN 200610039322 CN 200610039322 A CN200610039322 A CN 200610039322A CN 1825077 A CN1825077 A CN 1825077A
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- torque
- torque meter
- laser diffraction
- laser
- ccd sensor
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Abstract
The invention relates to a laser diffract torque meter. Two ends of elastic axis are installed two same rigidity disk that the feature is two fined slits that has same angle and same size are on the disk. One end installs laser source and the other end installs CCD sensor. And the CCD sensor is connected to computer. It has high stability and high noise immunity. The generating of torque signal is irrelevant to whether rotating, and the rotating speed and direction. The invention could improve running time and using life.
Description
Technical field
The present invention relates to instrument field, refer in particular to a kind of laser diffraction torque meter.
Background technology
The most frequent parameter that relates in rotary power system: rotary torque, mention the existing method that detects rotary torque at Li Guolin " digital torque sensor technical feature and application " and mainly contain two kinds.
First method is the torsion angle phase difference sensor, and this method is that two groups of identical gears of the number of teeth, shape and setting angle are installed at the two ends of elastic shaft, in the outside of gear a proximity transducer is installed respectively.When elastic shaft rotated, this two sensors just can be measured two group pulse ripples, and relatively the phase differential on the edge, front and back of this two group pulses ripple just can calculate the torque capacity that elastic shaft bears.The advantage of this method: realized the noncontact transmission of dtc signal, detection signal is a digital signal; Shortcoming: when elastic shaft does not rotate, can not produce pulsating wave, mean not energy measurement static torque; And during the slow-speed of revolution because the front and back of pulsating wave are difficult for relatively along slow, so low-speed performance is undesirable.
Second method is that the survey twisting strain sheet with special use sticks on the tested elastic shaft with strain gage adhesive, and forms strain bridge, if provide working power can test the electric signal that this elastic shaft is turned round to strain bridge.But in the rotary power transmission system, the most thorny issue is that the bridge of the strain bridge on the rotary body presses input and the output of detected strain signal how to transmit between rotating part and stationary part reliably, and common way is to finish with conducting slip ring.Shortcoming: because conducting slip ring belongs to the friction contact, therefore exist wearing and tearing and heating inevitably, thereby the serviceable life of having limited the rotating speed and the conducting slip ring of turning axle.And because the unreliable signal fluctuation that causes of contact, easily cause measuring error big even measure unsuccessful.
In order to overcome the defective of conducting slip ring, can also adopt radiotelemetric method: the moment of torsion strain signal is amplified and carries out V/F convert frequency signal on turning axle, by carrier modulation with the method for radio transmission outside turning axle is emitted to axle, use the method for radio reception again, just can obtain the signal that turning axle is turned round.Energy supply on the turning axle is the battery that is fixed on the turning axle.But also exist three weak points, one: be subject to use on-the-spot electromagnetic interference; Its two: owing to be powered battery, so can only short-term use.Its three: owing on turning axle, added structure, the dynamic equilibrium problems when easily causing high rotating speed.More outstanding when little range and small diameter shaft.
Patent CN01211689.0 laser diffraction measuring instrument is arranged in the prior art, it discloses a kind of laser diffraction measuring instrument technology, the laser generator type is installed in the pallet of the laser instrument column of base right part, have light hole on the support, left part is installed the back of laser pick-off optical screen digital display calliper is installed, emission of laser beam level or refract light source adopt noncontact, measure relatively or indirectly, realize parameter measurements such as size, morpheme sum of errors surfaceness, line value, angle value, micro-apertures.Its problem is to measure the quiescent value of some fixed objects, can not be used in the measurement of torque value, especially works as testee itself when rotated, can't measure its dynamic rotary torque value.Other has the CN03160137.5 torque detector, and described moment of torsion comprises synchronizing indicator, bridgt circuit and signal converter.Described synchronizing indicator detects has the default dc voltage level and the AC voltage signal of characteristic frequency, and producing the detection output signal, signal converter produces the moment of torsion detection signal of the amplitude of the difference between the peak value with corresponding predetermined reference voltage and first detection voltage.Its ultimate principle is that the ambient magnetic flux amount changes when testee twists, and obtains torque value by the sampled measurements to magnetic flux.Sampling may produce error when the AC voltage signal is asynchronous with sampled signal, and this patent has designed circuit kit and solved stationary problem.Same, its problem is that it can't measure rotary torque, and has a large amount of annexes and circuit on elastic shaft, easily influences its deformation and serviceable life.Because the change in magnetic field is subject to the influence of surrounding environment, the fluctuation that signal produces can cause measuring error in addition.
Summary of the invention:
The purpose of this invention is to provide a kind of accurate measurement moment of torsion, stability is high, strong interference immunity; The generation of torque signal and transmit and whether rotate rotating speed size, irrelevant to rotation direction; And installation accessories and circuit on elastic shaft do not influence its rotation and deformation, increase the novel torque measuring apparatus in working time and serviceable life.
The technical scheme that realizes above-mentioned technical purpose is characterized in that having on the disc face two angles for two identical rigidity disks of shape size are installed at the two ends of elastic shaft, the corresponding fully consistent fine gap of size.Lasing light emitter at one end is installed, and diffraction takes place after by two slits in the laser that sends.When elastic shaft twisted deformation, the public domain in two slits narrowed down, and meaned that the slit that laser passes through diminishes, and according to the diffraction of light principle, the round spot size that diffraction produces is relevant with the gap size that laser passes through.After the slit diminished, the round spot diameter that diffraction produces became big.Receive diffraction image at the other end with ccd sensor, with the imaging data transmission to computing machine.Just can obtain the torque that elastic shaft bears by measurement to diffraction circle spot diameter.
Beneficial effect of the present invention:
1. to measure static moment of torsion, also can measure rotary torque;
2. both static torque can be measured, also dynamic torque can be measured;
3. accuracy of detection height, good stability; Strong interference immunity;
4. there are not wear-out parts such as conducting ring, can high rotating speed long-play;
5. on elastic shaft, do not have accessory structures such as foil gauge, do not influence the rotation and the deformation of axle;
Description of drawings:
Fig. 1 is the structural representation of torque gauge
Fig. 2 is the planimetric map of disk among Fig. 1 (3)
1. lasing light emitter 2. slits 3., 4. one-tenth image data 5.CCD of disk sensor, 6. elastic shafts, 7. computing machines, 8. laser, 9. shells
Embodiment:
A rigidity disk (3) is respectively installed at the two ends of elastic shaft (6), and size is consistent.This disk can be connected to a fixed with testee.Respectively open the size of (2) two finedraws in a tiny crack on the disc face, angle is in full accord.Disk one end is installed semiconductor laser light source (1), and the laser that sends diffraction takes place after by two slits.The other end is equipped with ccd sensor (5) and carries out the image reception.Isolate with shell (9) with top, prevent external interference.The one-tenth image data (4) of ccd sensor transfers to computing machine (7), after with software image being handled, measures the diameter of diffraction pattern, obtains the corresponding torque value.
Claims (2)
1. laser diffraction torque meter, its two ends at elastic shaft are installed two shapes size identical rigidity disks (3), it is characterized in that having two angles on disk (3) face the corresponding fully consistent fine gap (2) of size; Lasing light emitter (1) at one end is installed, at the other end ccd sensor (5) that receives diffraction image is set, and ccd sensor (5) is linked to each other with computing machine (7).
2. laser diffraction torque meter according to claim 1 is characterized in that being provided with isolation shell (9) outside described laser diffraction torque meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610039322 CN1825077A (en) | 2006-04-05 | 2006-04-05 | Laser diffraction torque meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610039322 CN1825077A (en) | 2006-04-05 | 2006-04-05 | Laser diffraction torque meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1825077A true CN1825077A (en) | 2006-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610039322 Pending CN1825077A (en) | 2006-04-05 | 2006-04-05 | Laser diffraction torque meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1825077A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735188A (en) * | 2023-08-09 | 2023-09-12 | 常州市旭腾塑业科技有限公司 | Ball valve switch torque detection equipment, manufacturing method and detection method |
-
2006
- 2006-04-05 CN CN 200610039322 patent/CN1825077A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735188A (en) * | 2023-08-09 | 2023-09-12 | 常州市旭腾塑业科技有限公司 | Ball valve switch torque detection equipment, manufacturing method and detection method |
| CN116735188B (en) * | 2023-08-09 | 2023-10-27 | 常州市旭腾塑业科技有限公司 | Ball valve switch torque detection equipment, manufacturing method and detection method |
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