CN2773620Y - Displacement sensor - Google Patents
Displacement sensor Download PDFInfo
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- CN2773620Y CN2773620Y CN 200520008584 CN200520008584U CN2773620Y CN 2773620 Y CN2773620 Y CN 2773620Y CN 200520008584 CN200520008584 CN 200520008584 CN 200520008584 U CN200520008584 U CN 200520008584U CN 2773620 Y CN2773620 Y CN 2773620Y
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- earrings
- scanning
- displacement transducer
- fixed
- sector grating
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Abstract
The utility model discloses a displacement sensor. The utility model comprises a housing formed by a cylinder, a sealed front end cap and a sealed rear end cap with cable connecting terminals, wherein the inner wall and the neutral axis of the cylinder are symmetrically provided with two earrings; the external top angle of each of two fan-shaped grating slices in basically identical shapes and sizes is hinged to each of the earrings through a fastener; the central angles of the two fan-shaped grating slices are hinged, partly overlapped and installed together by relative rotation through a hinge shaft, and a space is kept between the tip of each central angle and the inner wall of the cylinder; the outer side of two fan-shaped grating slices is provided with a signal scanning and collecting mechanism connected to a signal line on the cable terminal and a scanning and driving mechanism connected to the signal scanning and picking mechanism; limiting devices arranged on the two fan-shaped grating slices are used for controlling signal collection and the on-off of circuits. The utility model has the advantages of simple structure and convenient use. The utility model can be widely used for effectively automatically monitoring and controlling surrounding rock masses in underground engineering, the top plate or bottom plate of roadways, supporting pillar, etc.
Description
Technical field
The utility model relates to a kind of sensor, particularly relates to a kind of displacement transducer that can monitor rock mass, the stressed interior of articles displacement in tunnel and STRESS VARIATION in the underground works exploitation that is applicable to.
Background technology
At present, the displacement transducer kind that detects displacement and STRESS VARIATION in the engineering is more, differs from one another, and its scope of application is respectively arranged.But, displacement and STRESS VARIATION for Rock Mass, the stressed interior of articles in tunnel in the underground workss such as mining and building, water conservancy, road, as: the digging that the roadway surrounding rock internal pressure changes caused impulsion pressure or coal workplace when the back production in coal mining to supporting object internal displacement and STRESS VARIATION such as tunnel roof and floor, coal columns, still lack so far a kind ofly can monitor in real time, record and instrument easy to detect automatically.
The utility model content
Technical problem to be solved in the utility model provides a kind of displacement transducer simple in structure, easy to use, and it not only can be monitored the variation of rock mass, stressed interior of articles displacement and stress effectively and can realize monitoring automatically for a long time.
The utility model displacement transducer, wherein: comprise by cylindrical shell, seal front end end cover and be provided with the housing that the sealing rear end cap of cable connecting terminal constitutes.At cylinder inboard wall and axis two earrings are set symmetrically, an outer drift angle of two plate shapes, big or small essentially identical sector grating piece is hinged on the earrings respectively by securing member; The central angle of two sector grating pieces is hinged by hinge, be installed together with overlapping, relatively rotate, and the top of its central angle and cylinder inboard wall have at interval; Be provided with the signal scanning collecting mechanism in two sector grating piece outsides, this signal scanning collecting mechanism comprises hinged and be provided with the scan arm of opto-electronic conversion control circuit with hinge, its scanning end is provided with infrared transmitting tube and photoelectric conversion tube, infrared transmitting tube and photoelectric conversion tube lay respectively at the both sides of two sector grating pieces, infrared transmitting tube is connected with the opto-electronic conversion control circuit respectively with photoelectric conversion tube, and the output terminal of opto-electronic conversion control circuit is connected with signal connecting line on the cable connecting terminal; On scan arm, also be provided with scan driving mechanism.
The utility model displacement transducer, wherein: scan driving mechanism can be to comprise a memorial alloy volute spring and " V " shape retracing spring, this memorial alloy volute spring one end is by being bolted to the scanning end of scan arm, on the earrings that the other end is fixed on wherein a slice sector grating piece is connected; Be somebody's turn to do " V " shape retracing spring and described hinge and be fixed together, the end of an one elasticity arm is by being bolted to the scanning end of scan arm, and the end of another elasticity arm is fixed on the earrings that is connected with same sector grating piece.Scan driving mechanism also can be to comprise two memorial alloy volute springs, the helical spring end of these two memorial alloys is fixed on the scanning end of scan arm jointly by bolt, on the earrings that the other end is separately fixed at a slice sector grating piece wherein is connected and on the interior drift angle of same sector grating piece.Scan driving mechanism can also be to comprise a memorial alloy volute spring and a volute spring, this memorial alloy volute spring one end is by being bolted to the scanning end of scan arm, on the earrings that the other end is fixed on wherein a slice sector grating piece is connected, these helical spring two ends be separately fixed on the described bolt and with the interior drift angle of same sector grating piece on.
The utility model displacement transducer, wherein: the left and right sides that is arranged on same xsect of two earrings symmetries.
The utility model displacement transducer, wherein: the grid pitch of two sector grating pieces is 0.025～1mm, infrared transmitting tube and photoelectric conversion tube between diaphragm is set.
The utility model displacement transducer, wherein: cylindrical shell is diameter 30～80mm, thickness 1～3mm, is made by metal material or elasticity nonmetallic materials.
As the further improvement of the utility model displacement transducer, wherein: be provided with two symmetrical axial slots on the barrel of cylindrical shell, slotted eye is distributed in the both sides of earrings.
Further improvement as the utility model displacement transducer, wherein: on sector grating piece, be provided with stop means, this stop means can be to comprise at least one spacing magnetic patch that is installed on a slice sector grating piece curved edge wherein and be positioned at the tongue tube that scan arm scanning end is gone up and matched with spacing magnetic patch, and tongue tube is connected with the opto-electronic conversion control circuit.This stop means also can be to comprise being installed at least one the spacing mark on a slice sector grating piece curved edge wherein and being positioned on the optocoupler control circuit fixed head of scan arm scanning end and the flute profile optocoupler that matches with spacing mark, the flute profile optocoupler is connected with the optocoupler control circuit, and the optocoupler control circuit is connected with the opto-electronic conversion control circuit.
Adopt said structure, two concentric, overlapped being installed in the seal casinghousing of sector grating piece, this housing is the force-summing element of the utility model displacement transducer.When being subjected to extraneous stress, housing make its cylindrical shell when stress direction produces distortion, two earrings produce relative displacement makes two sector grating pieces produce relative rotation around its center of circle, and on its lenticular lenses, form light and dark interference of light corner stripe pattern, that is: corner moire pattern picture.This corner moire image recording the situation of extraneous stress, STRESS VARIATION; Make the work of signal scanning collecting mechanism by scan driving mechanism then, above-mentioned corner moire pattern is become electrical signal information as information translation, be transported to through cable connecting terminal by signal connecting line and carry out the signal data processing in external control and the signal processing system; Pass through moire computing method in the optical measurement mechanics again, calculate the relative displacement that two sheet gration sheets rotate exactly, extrapolate the size of extraneous stress and the variable quantity of stress, therefore, the utility model displacement transducer is a kind of simple in structure, easy to operate, in real time the instrument of long term monitoring rock mass internal stress.It can be widely used in the underground workss such as coal mining, building, water conservancy, road carries out effectively, monitors automatically and control in real time the displacement and the STRESS VARIATION situation of Rock Mass, tunnel roof and floor, support rock mass etc.; Thereby not only can accurately monitor tunnel safety, in time eliminate accident potential, and provide foundation, further improve production efficiency, reduce security incident for supporting the rock mass design in the tunnel.
Owing to be provided with two symmetrical axial slots on the barrel of cylindrical shell, slotted eye is distributed in the earrings both sides.Slotted eye weakens barrel intensity.Therefore, when housing is subjected to extraneous stress, have groove or slotted eye barrel side and be very easy to produce distortion, that is: cylindrical shell only is subjected to the pressure effect of radial direction, makes the simplified distortion that is merely able to produce along the line of two earrings radial direction, thereby makes two sector grating pieces produce relative rotation around its center of circle, on lenticular lenses, form the moire pattern picture of bigger corner, and then improved the sensitivity that detects displacement, increased the displacement detecting scope
On lenticular lenses, be provided with the stop means of restriction sweep interval.This stop means can limit the interval of scanning corner moire pattern picture on the one hand, make the corner moire image information of institute's scanning collection in certain interval range, can access the correction of repeated multiple times, and then improved the detection accuracy rate and the reliability of the utility model displacement transducer; On the other hand also can control signal collection and contactor.
Description of drawings
Fig. 1 is the structural representation of the utility model displacement transducer;
Fig. 2 is the scan driving mechanism first embodiment structural representation of M-M cut-open view among Fig. 1;
Fig. 3 is the stop means first embodiment structural representation of N-N cut-open view among Fig. 2;
Fig. 4 is the scan driving mechanism second embodiment structural representation of M-M cut-open view among Fig. 1;
Fig. 5 is the stop means second embodiment structural representation of N-N cut-open view among Fig. 2.
Embodiment
Be described further below in conjunction with the embodiment of accompanying drawing the utility model displacement transducer.
By shown in Figure 1, the utility model displacement transducer comprises housing, two sector grating pieces, signal scanning collecting mechanism, scan driving mechanism and stop means.
Wherein: housing is the force-summing element of the utility model displacement transducer, it comprises: by metal material or simplified 1, the sealing front end end cover 9 that has that certain flexible nonmetallic materials make and sealing rear end cap 17 constitute, cylindrical shell 1 diameter 30～80mm, thickness 1～3mm, at cylindrical shell 1 inwall and axis two earrings 5 are set symmetrically, two left and right sides that are arranged on same xsect that earrings 5 is preferably symmetrical, cable connecting terminal 18 is fixed on the sealing rear end cap 17.
Two sector grating pieces 6 are shape, big or small essentially identical lenticular lenses, an outer drift angle in these two sector grating pieces 6 is installed on two earrings 5 of cylindrical shell 1 inwall respectively by fixture 2, its central angle is hinged by hinge 15, and two sector grating pieces 6 are installed together with overlapping.Two sector grating pieces 6 can relatively rotate around its central angle, reserve certain space between the summit of central angle and the cylindrical shell 1, the central angle top can free at random displacement and do not contact with the barrel of cylindrical shell 1 when guaranteeing housing distortion, thus the corner moire pattern image distortion of avoiding it to generate; According to the range and the precision of displacement transducer, it is 0.025～1mm that lenticular lenses can be selected the grid pitch for use, that is: the lenticular lenses of every millimeter 40 line to 1 line.Like this, when being subjected to extraneous stress, housing make its cylindrical shell when stress direction produces distortion, two sector grating pieces 6 will produce relative rotation around its center of circle because of barrel distortion, and on its lenticular lenses, form light and dark interference of light corner stripe pattern, that is: corner moire pattern picture, this moire image recording the situation of extraneous stress, STRESS VARIATION.In order to improve the sensitivity of displacement detecting, enlarge the scope of displacement detecting, on the barrel of cylindrical shell, be provided with two symmetrical axial slots 8, this groove 8 be distributed in earrings 5 both sides, the shape and the size of slotted eye can be set according to stressing conditions.Like this, when housing is subjected to extraneous stress, because having the cylindrical shell 1 barrel intensity of slotted eye weakens, make it be very easy to produce distortion along the barrel side, this moment, cylindrical shell only was subjected to along the pressure effect of above-mentioned earrings 5 radial direction, and cylindrical shell 1 is merely able to produce along the line of two earrings 5 distortion of radial direction, thereby make two sector grating pieces 6 produce bigger relative rotation, on lenticular lenses, form intensive stripe pattern, improved the sensitivity and the precision of sensor, enlarged measurement range.
The signal scanning collecting mechanism comprises: be provided with scan arm 13, infrared transmitting tube 7 and the photoelectric conversion tube 12 of opto-electronic conversion control circuit, in order to improve resolution, at infrared transmitting tube 7 and 12 of photoelectric conversion tubes diaphragm be set.Infrared transmitting tube 7 and photoelectric conversion tube 12 are fixed on the scanning end of scan arm 13, place the both sides of two sector grating pieces 6 respectively, infrared transmitting tube 7 is connected with the opto-electronic conversion control circuit respectively with photoelectric conversion tube 12, and the output terminal of opto-electronic conversion control circuit is connected with signal connecting line 16 on the cable connecting terminal 18.The installation end of scan arm 13 and hinge 15 are hinged, and it can be rotated around hinge.
By shown in Figure 2, first embodiment of scan driving mechanism is: comprise a memorial alloy volute spring 4 and " V " shape retracing spring 3; These memorial alloy volute spring 4 one ends are fixed on the scanning end of scan arm 13 by bolt 14, on the earrings 5 that the other end is fixed on wherein a slice sector grating piece 6 is connected; Should " V " shape retracing spring 3 be fixed together with hinge 15, the end of an one elasticity arm is fixed on the scanning end of scan arm 13 by bolt 14, and the end of another elasticity arm is fixed on the earrings 5 that is connected with same sector grating piece 6.During work, memory alloy spring 4 is begun to shrink by original extended state, drives scan arm 13 and carries out information scanning and collection along 6 rotations of two sector grating pieces, finishes an one way scanning.
In like manner, scan driving mechanism can be designed the embodiment of multiple version according to actual conditions.By shown in Figure 4, second embodiment of scan driving mechanism is: comprise two memorial alloy volute springs 4; One of them is an extension spring, another is a compression spring, one end of these two memorial alloy volute springs 4 is fixed on the scanning end of scan arm 13 jointly by bolt 14, and the other end is separately fixed on the interior drift angle of the earrings 5 that is connected with a slice sector grating piece 6 wherein and same sector grating piece 6.The 3rd embodiment of scan driving mechanism is: comprise a memorial alloy volute spring 4 and a volute spring; These memorial alloy volute spring 4 one ends are fixed on the scanning end of scan arm 13 by bolt 14, on the earrings 5 that the other end is fixed on wherein a slice sector grating piece 6 is connected, these helical spring two ends be separately fixed on the described bolt 14 and with the interior drift angle of same sector grating piece 6 on.
On sector grating piece 6, be provided with stop means, make scanning collection mechanism in certain valid interval, extract stripe information, for the information that can correction signal scanning collection mechanism be obtained, the result reliability that scanning detects is improved, can utilize information that retrace scanning obtains or the number of times of taking to increase multiple scanning.In addition, stop means is also being controlled the switch of signals collecting and memorial alloy volute spring circuit.Specifically: by shown in Figure 3, stop means first embodiment adopts and to comprise: be installed at least one spacing magnetic patch 11 on a slice sector grating piece 6 curved edges wherein and be positioned at the tongue tube 10 that scan arm 13 scanning ends are gone up and matched with spacing magnetic patch 11, tongue tube 10 is connected with the opto-electronic conversion control circuit.The distance that spacing magnetic patch is 11 promptly defines the valid interval that scanning collection mechanism can carry out scanning collection corner moire pattern picture.By shown in Figure 5, stop means second embodiment adopts and to comprise: be installed at least one the spacing mark 21 on a slice sector grating piece 6 curved edges wherein and be positioned on the optocoupler control circuit fixed head 20 of scan arm 13 scanning ends and the flute profile optocoupler 19 that matches with spacing mark 21, flute profile optocoupler 19 is connected with the optocoupler control circuit, and the optocoupler control circuit is connected with the opto-electronic conversion control circuit.Distance between the spacing mark 21 promptly defines the valid interval that scanning collection mechanism can carry out scanning collection corner moire pattern picture.Above-mentioned spacing magnetic patch 11 and tongue tube 10 or spacing mark 21 and flute profile optocoupler 19 cooperatively interact the signal of output can control signal scanning collection mechanism and scan driving mechanism in above-mentioned valid interval, carry out information acquisition.Like this, can utilize the information that retrace scanning obtains or take to control memorial alloy volute spring 4 increases the multiple scanning number of times, comes and goes in the valid interval of scanning and carries out repeatedly information scanning and collection, further improves the accuracy of scanning detecting result.
The supply voltage of the utility model displacement transducer is DC 5V, and memory alloy spring 4 supply currents are more than or equal to 800mA, and the displacement signal of output is the sinusoidal signal of digital signaling zero and 5V or analog information 0～5V.Stop means output 0 and 5V level signal.
The accuracy of detection of the utility model displacement transducer is relevant with grid pitch, case material character, the photoelectric conversion tube resolution of grating, as: the diameter for cylindrical shell 1 is that 40mm, thickness are that 2mm, grid pitch are the displacement transducer of 0.08mm, and the detection least displacement is 0.05mm.
During use, the utility model displacement transducer is placed Rock Mass, tunnel roof and floor, supports in the boring of monitored stressed objects such as rock mass, cable connecting terminal 18 connects with the control and the signal processing system of outside.When near monitored stressed interior of articles STRESS VARIATION such as rock mass, roof and floor, support the rock mass boring, borehole shape produces distortion, the displacement transducer housing also produces distortion thereupon produces relative rotation two sector grating pieces 6 that place in the cylindrical shell 1, forms the stress that has write down monitored stressed interior of articles such as Rock Mass, tunnel roof and floor, support rock mass, the corner moire pattern picture of STRESS VARIATION situation.When needs gather the corner moire pattern as the time, the work of scan driving mechanism drive signal scanning collection mechanism, with photoelectric conversion tube 12 this corner moire pattern is become electric signal as information translation by infrared transmitting tube 7, be transported to control and signal processing system, calculate the stress that obtains monitored interior of articles, the situation of STRESS VARIATION through data processing and optical measurement mechanics.When the information that the needs correction is obtained, when improving the reliability of testing result, the information or the increase scanning times that can utilize retrace scanning to obtain come and go in the valid interval of scanning and carry out repeatedly information scanning and collection.
Claims (10)
1. displacement transducer, it is characterized in that: comprise by cylindrical shell (1), sealing front end end cover (9) and be provided with the housing of sealing rear end cap (17) formation of cable connecting terminal (18), at described cylindrical shell (1) inwall and axis two earrings (5) are set symmetrically, two plate shapes, an outer drift angle of the essentially identical sector grating piece of size (6) is hinged on respectively on the earrings (5) by securing member (2), the central angle of described two sector grating pieces (6) is hinged by hinge (15), overlap, be installed together, and the top of its central angle and cylindrical shell (1) inwall have at interval with relatively rotating; Be provided with the signal scanning collecting mechanism in described two sector grating pieces (6) outside, this signal scanning collecting mechanism comprises with hinge (15) hinged, and be provided with the scan arm (13) of opto-electronic conversion control circuit, its scanning end is provided with infrared transmitting tube (7) and photoelectric conversion tube (12), described infrared transmitting tube (7) and photoelectric conversion tube (12) lay respectively at the both sides of described two sector grating pieces (6), described infrared transmitting tube (7) is connected with the opto-electronic conversion control circuit respectively with photoelectric conversion tube (12), and the output terminal of opto-electronic conversion control circuit is connected with signal connecting line (16) on the cable connecting terminal (18); On described scan arm (13), also be provided with scan driving mechanism.
2. displacement transducer according to claim 1, it is characterized in that: described scan driving mechanism comprises a memorial alloy volute spring (4) and " V " shape retracing spring (3), these memorial alloy volute spring (4) one ends are fixed on the scanning end of scan arm (13) by bolt (14), on the earrings (5) that the other end is fixed on wherein a slice sector grating piece (6) is connected; Should be fixed together with described hinge (15) by " V " shape retracing spring (3), the end of an one elasticity arm is fixed on the scanning end of scan arm (13) by bolt (14), and the end of another elasticity arm is fixed on the earrings (5) that is connected with same sector grating piece (6).
3. displacement transducer according to claim 1, it is characterized in that: described scan driving mechanism comprises two memorial alloy volute springs (4), one end of these two memorial alloy volute springs (4) is fixed on the scanning end of scan arm (13) jointly by bolt (14), the other end be separately fixed at that the earrings (5) that is connected with a slice sector grating piece (6) is wherein gone up and the interior drift angle of same sector grating piece (6) on.
4. displacement transducer according to claim 1, it is characterized in that: described scan driving mechanism comprises a memorial alloy volute spring (4) and a volute spring, these memorial alloy volute spring (4) one ends are fixed on the scanning end of scan arm (13) by bolt (14), on the earrings (5) that the other end is fixed on wherein a slice sector grating piece (6) is connected, these helical spring two ends be separately fixed at that described bolt (14) is gone up and with the interior drift angle of same sector grating piece (6) on.
5. according to any one described displacement transducer in the claim 1 to 4, it is characterized in that: the left and right sides that is arranged on same xsect of described two earrings (5) symmetry.
6. displacement transducer according to claim 5 is characterized in that: the grid pitch of described two sector grating pieces (6) is 0.025～1mm, between described infrared transmitting tube (7) and photoelectric conversion tube (12) diaphragm is set.
7. displacement transducer according to claim 6 is characterized in that: described cylindrical shell (1) is diameter 30～80mm, thickness 1～3mm, is made by metal material or elasticity nonmetallic materials.
8. displacement transducer according to claim 7 is characterized in that: be provided with two symmetrical axial slots (8) on the barrel of described cylindrical shell (1), described slotted eye (8) is distributed in the both sides of described earrings (5).
9. displacement transducer according to claim 8, it is characterized in that: on described two sector grating pieces (6), be provided with stop means, this stop means comprises and is installed at least one spacing magnetic patch (11) on a slice sector grating piece (6) curved edge wherein and is positioned at the tongue tube (10) that described scan arm (13) scanning end is gone up and matched with spacing magnetic patch (11) that described tongue tube (10) is connected with the opto-electronic conversion control circuit.
10. displacement transducer according to claim 8, it is characterized in that: on described two sector grating pieces (6), be provided with stop means, the flute profile optocoupler (19) that this stop means comprises that the optocoupler control circuit fixed head (20) that is installed at least one the spacing mark (21) on a slice sector grating piece (6) curved edge wherein and is positioned at described scan arm (13) scanning end is gone up and matches with spacing mark (21), described flute profile optocoupler (19) is connected with the optocoupler control circuit, and the optocoupler control circuit is connected with the opto-electronic conversion control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520008584 CN2773620Y (en) | 2005-03-17 | 2005-03-17 | Displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520008584 CN2773620Y (en) | 2005-03-17 | 2005-03-17 | Displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2773620Y true CN2773620Y (en) | 2006-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520008584 Expired - Fee Related CN2773620Y (en) | 2005-03-17 | 2005-03-17 | Displacement sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN2773620Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383507C (en) * | 2006-06-02 | 2008-04-23 | 安里千 | Stress monitoring instrument |
| CN104165569A (en) * | 2014-09-04 | 2014-11-26 | 山东汇丰铸造科技股份有限公司 | Auxiliary tool for measuring distance of flanges of winding drum |
| CN108272396A (en) * | 2017-12-28 | 2018-07-13 | 宁波洒哇地咔电器有限公司 | Intelligent mopping working condition identifies control mechanism and recognition detection method |
-
2005
- 2005-03-17 CN CN 200520008584 patent/CN2773620Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383507C (en) * | 2006-06-02 | 2008-04-23 | 安里千 | Stress monitoring instrument |
| CN104165569A (en) * | 2014-09-04 | 2014-11-26 | 山东汇丰铸造科技股份有限公司 | Auxiliary tool for measuring distance of flanges of winding drum |
| CN108272396A (en) * | 2017-12-28 | 2018-07-13 | 宁波洒哇地咔电器有限公司 | Intelligent mopping working condition identifies control mechanism and recognition detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060419 Termination date: 20110317 |