CN100383507C - Stress monitoring instrument - Google Patents
Stress monitoring instrument Download PDFInfo
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- CN100383507C CN100383507C CNB2006100833222A CN200610083322A CN100383507C CN 100383507 C CN100383507 C CN 100383507C CN B2006100833222 A CNB2006100833222 A CN B2006100833222A CN 200610083322 A CN200610083322 A CN 200610083322A CN 100383507 C CN100383507 C CN 100383507C
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- transfer table
- chip microcomputer
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Abstract
The present invention relates to a stress monitoring instrument which comprises a stress sensor unit and an information acquisition processing unit, wherein the stress sensor unit is composed of a stress converting mechanism, an information converting mechanism, a scan driving mechanism and a limiting mechanism, and the information acquisition processing unit is composed of an SCM, a digital display and a voltage to frequency converting module. The stress converting mechanism is composed of a spring seat, a spring and a pressure bearing post. The information converting mechanism is composed of a scanning arm, and an infrared luminous tube, an infrared receiving tube, a small grating board and a long grating ruler which are arranged on the scanning arm. The scan driving mechanism is composed of a movable table, guiding ways, a return spring and a memory spring. The scan driving mechanism is pressed on the movable table by a pressing rod on the pressing post and can convert the stress on the pressure bearing post into electric signals by grating displacement, and the electric signals are acquired and processed by an information processing unit in order to detect the change of the stress. The present invention is the instrument which has the advantages of convenient operation, high precision and long-distance automatic monitoring. The present invention monitors the internal stress of a rock body in real time, and can be widely used for coal mining, earthwork, water conservancy, roads, tunnels, underground projects, etc.
Description
Technical field
The present invention relates to a kind of detecting instrument, design a kind of stress monitoring instrument that is applicable to real-time monitoring rock (coal) the body internal stress that coal road, the inner mining-induced stress of coal column change especially.
Background technology
At present, the sensor that detects stress-strain in the engineering is not only of a great variety, and differ from one another, its scope of application is respectively arranged, but, to building, water conservancy, road, rock mass in the exploitation in mine and the underground works, the instrument that the stress of inside, rock stratum, tunnel is monitored automatically and forecast is rare, especially the real-time automatic monitoring that the inner mining-induced stress of coal under the coal mine (rock) body is changed almost is blank, for example, the impulsion pressure that the sudden change of roadway surrounding rock internal stress causes in coal mining, digging is to roadway surrounding rock during the coal back production, rock stratum internal stresss such as coal column change the tunnel roof fall that causes, end distension, the security incident that collapses and fall etc. and to cause still lacks reliably so far, the instrument of effective real-time automatic monitoring and forecast.
Summary of the invention
The invention provides a kind of simple in structure, easy to use, effectively monitor the stress monitoring instrument of rock mass and stressed interior of articles all directions stress and strain, real-time automatic monitoring.
Stress monitoring instrument of the present invention, comprise strain gauge unit and information acquisition processing unit, described strain gauge unit is by housing, stress transmission mechanism, information translation mechanism, scan driving mechanism and position-limit mechanism are formed, described stress transmission mechanism is a transverse spring seat in housing, placing on the described spring of spring in the circular hole of described spring base is stepped ramp type pressure-bearing post, the thin platform of described pressure-bearing post partly stretches out the housing outside, described information translation mechanism has one to be fixed on folding rule type scan arm on the base on the described housing by pillar, on inboard, described scan arm folding rule limit, the infraluminescence pipe is installed successively, little original screen panel and infrared receiving tube, described infraluminescence pipe connects power supply, the output terminal of described infrared receiving tube connects the input end of described information acquisition processing unit, described scan driving mechanism is established one and is enclosed within two transfer tables on the guide rail, described long grating chi one end that is carved with spacing mark is fixed on the extension arm of described transfer table, described two guide rail lower ends are fixed on the described base, article two, retracing spring is enclosed within respectively on described two guide rails, described position-limit mechanism constitutes the next and upper spacing by the flute profile optocoupler that is located on the described scan arm respectively with the contact-making switch that is located at described transfer table top, the depression bar that is fixed on the described pressure-bearing post is pressed on the described transfer table, and the other end of described long grating chi is just in time inserted in the slit between described little grating chi and the infrared transmitting tube.
Stress monitoring instrument of the present invention, described information acquisition processing unit is an independent casing, in adorn a single-chip microcomputer and voltage-frequency modular converter, nixie display is installed on the casing, at least one road, the input port of described single-chip microcomputer connects the output terminal of described infrared receiving tube, the output of described single chip control module connects nixie display and voltage-frequency modular converter respectively, above-mentioned single-chip microcomputer, nixie display and voltage-frequency modular converter provide various required voltage power supplies by a power module, and this information acquisition processing unit links with the strain gauge unit and the substation of communicating by letter respectively by cable.
Stress monitoring instrument of the present invention, two elastic sliding vanes are fixed in the middle part below the described transfer table, a memory alloy spring is installed between two lower extreme point, the termination that is fixed on the described depression bar on the pressure-bearing post is provided with the card arm, this card arm is stuck on described two elastic sliding vanes, a contact-making switch is established on described transfer table top, and described memory alloy spring two ends connect power supply, and power switch connects a control mouth of single-chip microcomputer.
Stress monitoring instrument of the present invention, at end points of described transfer table middle part fixed memory alloy spring, and link with single-chip microcomputer one control end, the other end of described memory spring is fixed on the described base, and link with power cathode, described depression bar one end is close to barrel and is fixed on the pressure-bearing post, and a contact-making switch is installed on the described depression bar, and links to each other with the single-chip microcomputer input end.
Stress monitoring instrument of the present invention, at least two covers angled strain gauge unit mutually is installed in a described housing, the infrared receiving tube of described at least two mutual angled strain gauge unit connects the different input ports of described single-chip microcomputer.
Stress monitoring instrument of the present invention, housing is installed in the boring of rock (coal) body, the pressure-bearing post closely contacts with hole wall, when bore hole pressure acts on the pressure-bearing column top, spring is compressed by the pressure-bearing post, the pressure-bearing post moves by card arm and two elastic sliding vanes drive scan arms of depression bar termination, when the memory alloy spring energising is shunk, two elastic sliding vanes that are fixed on below the transfer table are drawn close and are blocked arm and break away to the centre, long grating chi and transfer table slide to original position under the retracing spring effect, the interference fringe that long grating chi and little original screen panel produce converts striped to electric signal by infraluminescence pipe and photoelectric receiving tube, by the information acquisition processing instrument record of special development.
The present invention be a kind of easy to operate, precision is high, can monitor the instrument of rock mass internal stress for a long time in real time.This instrument also can be used for far distance automatic monitoring, can be widely used in coal mining, building, water conservancy, road, tunnel, underground works etc. to country rock body and displacement and the STRESS VARIATION situation is carried out effectively, real-time automatic monitoring can not only be eliminated accident potential, and be that the supporting design of engineering improves foundation.
Description of drawings
Fig. 1 is the front elevation of stress monitoring instrument first embodiment of the present invention;
Fig. 2 is the side view of stress monitoring instrument first embodiment of the present invention;
Fig. 3 is the synoptic diagram of transfer table among stress monitoring instrument first embodiment of the present invention;
Fig. 4 is the synoptic diagram of depression bar among stress monitoring instrument first embodiment of the present invention;
Fig. 5 is the synoptic diagram of transfer table among stress monitoring instrument second embodiment of the present invention;
Fig. 6 is the front elevation of stress monitoring instrument second embodiment of the present invention;
Fig. 7 is the side view of stress monitoring instrument second embodiment of the present invention;
Fig. 8 is the front elevation of stress monitoring instrument dual sensor of the present invention;
Fig. 9 is the side view of stress monitoring instrument dual sensor of the present invention;
Figure 10 is a stress monitoring instrument circuit block diagram of the present invention.
Embodiment
For further setting forth the present invention, be described in detail below in conjunction with embodiment.
First kind of scheme (seeing Fig. 1, Fig. 2) of stress monitoring instrument of the present invention, comprise strain gauge unit and information acquisition processing unit, wherein, strain gauge unit housing 3, comprise sealing front end end cover 2 and sealing rear end cap 15, housing 3 is by metal or have that the non-metallic elastic material of certain intensity makes, diameter is 30～60mm, wall thickness 1～3mm, have the circular hole that diameter is 10mm on the barrel, sealing front end end cover 2 and sealing rear end cap 15 are fixed on the two ends of housing 3 respectively with fluid sealant, connection terminal 1 is fixed on the sealing front end end cover 2.
The strain gauge unit is the core, comprises stress transmission mechanism, information translation mechanism, scan driving mechanism and position-limit mechanism.
Stress transmission mechanism comprises spring base 12, spring 14 and pressure-bearing post 13 and depression bar 11.Spring base 12 is that diameter equates with housing 3 internal diameters, thickness 20mm mould disk firmly, bore the circular hole hole that diameter is 15mm, built-in spring 14 and pressure-bearing post 13 along disk diameter; Pressure-bearing post 13 is step-like cylinder, thick column part diameter equates that with spring 14 external diameters thin column part diameter is 10mm, corresponding to the circular hole position mounting spring seat 12 on the barrel, the thin column part of pressure-bearing post 13 stretches out from the barrel circular hole of housing 3, high about 10mm; Pressure-bearing post 13 places on the spring 14, and depression bar 11 1 ends are fixed on the pressure-bearing post 13, and the other end is installed a card arm 25.When external force acts on pressure-bearing post 13 tops, spring 14 is compressed, and pressure-bearing post 13 drives depression bars 11 and card arm 25 same moved further, transmits the displacement that external force causes.
Information translation mechanism comprises folding rule type scan arm 5, little original screen panel 17, scan arm 5 is fixed on the housing 3 by pillar 22, inboard, folding rule limit at scan arm 5, infraluminescence pipe 20, infrared receiving tube 16 and grooved optocoupler 19 are installed, infrared receiving tube 16 front installation dimensions are the little original screen panel 17 of 4 * 5mm, between infraluminescence pipe 20 and little original screen panel 17, the slit of long grating chi 6 thickness that reservation designs below.
Scan driving mechanism comprises transfer table 8, guide rail 10, retracing spring 9, memory alloy spring 23, base 24 and is carved with the long grating chi 6 (seeing Fig. 3 for details) of spacing mark 18, transfer table 8 is enclosed within on two guide rails 10, the guide rail lower end is fixed on the base 24, article two, retracing spring 9 is enclosed within respectively on two guide rails 10, and base 24 is fixed on the barrel.Two elastic sliding vanes 21 are fixed in the middle part below the transfer table 8, and a memory alloy spring 23 is installed between two lower extreme point, and the card arm (see figure 4) of depression bar 11 terminations is stuck on two elastic sliding vanes 21.One end of long grating chi 6 is fixed on the extension arm of transfer table 8, and long grating chi 6 places between infraluminescence pipe 20 and the little original screen panel 17, is of a size of 20 * 10mm, when it forms isarithmic interference fringe during with little grating 17 relative slips.
When external force acts on pressure-bearing post 7 tops, spring 14 is compressed, and pressure-bearing post 13 drives transfer tables 8 and long grating chi 6 same moved further by card arm 25 and two elastic sliding vanes 21 of depression bar 11, and the while, two retracing springs 9 were compressed.
When needs detect stress, monolithic processor controlled power supply gives memory alloy spring 23 power supplies, memory alloy spring 23 energisings are shunk, two elastic sliding vanes 21 that are fixed on below the transfer table 8 are drawn close and are blocked arm 25 and break away to the centre, long grating chi 6 and transfer table 8 slide to original position under retracing spring 9 effects, the interference fringe that long grating chi 6 and little original screen panel 17 produce, infrared receiving tube 16 detects these signals and also gives single-chip microcomputer; Transfer table 8 is got back to original position, triggers contact-making switch 7, and memory alloy spring 23 power supplies stop, and memory alloy spring 23 opens again, blocks the card arm on the depression bar 11, and both interfix, and waits for the generation of the displacement that pressure-bearing post 13 is new.
The information acquisition processing unit is formed (see figure 10) by single-chip microcomputer, nixie display, voltage-frequency modular converter and power module, make independent one and place sensor unit place in addition, casing is made by explosion-proof lamp, power module is transformed into suitable voltage to external power and supplies with single-chip microcomputer, nixie display and voltage-frequency converter, and gives the relevant device power supply of strain gauge by the out-put supply line.Single-chip microcomputer is by the raster scanning and the stress opto-electronic conversion of control line proof stress sensor, and with the conversion optoelectronic information import single-chip microcomputer by signal wire, the signal conveys that single-chip microcomputer will be gathered and handle is to nixie display, demonstrate stress value, the signal conveys that simultaneously will gather and handle again converts the frequency signal that communication is used to voltage-frequency converter, this frequency signal is sent to the downhole communication substation by signal wire, is transferred to ground by the communication substation again.
Fig. 6 and Fig. 7 are the synoptic diagram of stress monitoring instrument second embodiment of the present invention, be the another kind of form (see figure 5) of scan driving mechanism with the first embodiment difference, a memory alloy spring 23 wherein is installed between transfer table 8 and the base 24, memory alloy spring 23 1 ends are fixed on transfer table 8 middle parts, and link with single-chip microcomputer one control end, the other end is fixed on the base 24, and link with power cathode, one contact-making switch 7 is arranged at transfer table top, on the scanning wall grooved optocoupler 19 is arranged, connect the different input ends of single-chip microcomputer respectively.
In actual use, two (even more) angled strain gauge unit (seeing Fig. 8 Fig. 9) mutually can also be installed in a housing 3, two unit are just the same, in Fig. 8 Fig. 9, represent the part codes of Unit second, separate with dividing plate 26 between two unit with the female A of digital back word adding.The infrared receiving tube 16 of two mutual angled strain gauge unit, the different input ports of the single chip control module in the 16A link information collecting unit.
The strain gauge unit of stress monitoring instrument of the present invention can be installed in the country rock body, support in the boring of rock mass, the monitored stressed object of coal and rock, and (as accompanying drawing 1), connection terminal 1 connects with the signal acquiring processing system of boring outside.When rock (coal) the body internal stress around the boring changes, the stress of hole wall is on the pressure-bearing post 13 of strain gauge, by stress transmission mechanism, information translation mechanism, scan driving mechanism and position-limit mechanism, stress transmission is become displacement, convert interference of light information again to, convert electric signal at last to.After electric signal is sent to the single chip control module processing of information acquisition processing instrument by cable, show on display through display module, the voltage-frequency modular converter of the processing unit of information acquisition simultaneously is that frequency signal is transferred to ground monitoring master station by underground substation with the hole wall stress transmission, convert frequency signal to stress information, through visualization processing, show roadway surrounding rock ply stress Changing Pattern figure.Stress monitoring instrument of the present invention both can have been monitored the absolute stress value of rock (coal) layer, but also monitor stress rate of change can be implemented avoid the security incident that causes because of impulsion pressure to the remote real-time automatic monitoring of underworkings country rock body stress from ground monitoring master station.Stress monitoring instrument of the present invention is simple in structure, easy to operate, both be applicable to little displacement high-acruracy survey.This instrument can be widely used in the work progresss such as mining, building, water conservancy, road rock mass internal stress variation carrying out auto-real-time monitorings effectively such as country rock body, supporting rock mass, in time eliminate production safety hidden danger, also for the tunnel and support the rock mass design foundation is provided.
Claims (5)
1. stress monitoring instrument, comprise strain gauge unit and information acquisition processing unit, it is characterized in that described strain gauge unit is by housing (3), stress transmission mechanism, information translation mechanism, scan driving mechanism and position-limit mechanism are formed, described stress transmission mechanism is a transverse spring seat (12) in housing (3), in the circular hole of described spring base (12), place spring (14), described spring (14) is gone up and is stepped ramp type pressure-bearing post (13), the thin platform of described pressure-bearing post (13) partly stretches out housing (3) outside, described information translation mechanism has one to be fixed on folding rule type scan arm (5) on the base (24) on the described housing (3) by pillar (22), on inboard, described scan arm (5) folding rule limit, infraluminescence pipe (20) is installed successively, little original screen panel (17) and infrared receiving tube (16), described infraluminescence pipe (20) connects power supply, the output terminal of described infrared receiving tube (16) connects the input end of described information acquisition processing unit, described scan driving mechanism is established a transfer table (8) that is enclosed within on two guide rails (10), long grating chi (6) one ends that are carved with spacing mark are fixed on the extension arm of described transfer table (8), described two guide rails (10) lower end is fixed on (24) on the described base, article two, retracing spring (9) is enclosed within respectively on described two guide rails (10), described position-limit mechanism constitutes the next and upper spacing respectively by the contact-making switch (7) that is located at the flute profile optocoupler (19) on the described scan arm (5) and be located on the described transfer table (8), the depression bar (11) that is fixed on the described pressure-bearing post (13) is pressed on the described transfer table (8), and the other end of described long grating chi (6) is just in time inserted in the slit between described little original screen panel (17) and the infrared transmitting tube (20).
2. according to the stress monitoring instrument of claim 1, it is characterized in that described information acquisition processing unit is an independent casing, in adorn a single-chip microcomputer and voltage-frequency modular converter, nixie display is installed on the casing, at least one road, the input port of described single-chip microcomputer connects the output terminal of described infrared receiving tube (16), the output of described single chip control module connects nixie display and voltage-frequency modular converter respectively, above-mentioned single-chip microcomputer, nixie display and voltage-frequency modular converter provide various required voltage power supplies by a power module, and this information acquisition processing unit links with the strain gauge unit and the substation of communicating by letter respectively by cable.
3. according to the stress monitoring instrument of claim 2, it is characterized in that two elastic sliding vanes (21) are fixed in the middle part below the described transfer table (8), a memory alloy spring (23) is installed between two lower extreme point, the termination that is fixed on the described depression bar (11) on the pressure-bearing post (13) is provided with card arm (25), this card arm (25) is stuck on described two elastic sliding vanes (21), a contact-making switch (7) is established on described transfer table (8) top, described memory alloy spring (23) two ends connect power supply, and power switch connects a control mouth of single-chip microcomputer.
4. according to the stress monitoring instrument of claim 2, it is characterized in that, at (23) end points of described transfer table (8) middle part fixed memory alloy spring, and link with single-chip microcomputer one control end, the other end of described memory alloy spring (23) is fixed on the described base (24), and links with power cathode, and described depression bar (11) one ends are close to barrel and are fixed on the pressure-bearing post (13), a contact-making switch (7) is installed on the described depression bar (11), and links to each other with the single-chip microcomputer input end.
5. according to the stress monitoring instrument of claim 3 or 4, it is characterized in that in described housing (3), installing at least two covers angled strain gauge unit mutually, the infrared receiving tube of described at least two mutual angled strain gauge unit (16,16A) connects the different input ports of described single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100833222A CN100383507C (en) | 2006-06-02 | 2006-06-02 | Stress monitoring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100833222A CN100383507C (en) | 2006-06-02 | 2006-06-02 | Stress monitoring instrument |
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| CN1851426A CN1851426A (en) | 2006-10-25 |
| CN100383507C true CN100383507C (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100833222A Expired - Fee Related CN100383507C (en) | 2006-06-02 | 2006-06-02 | Stress monitoring instrument |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100555000C (en) * | 2007-03-12 | 2009-10-28 | 中国矿业大学 | A kind of contactless rock pressure [in mine observation and evaluation method |
| CN101539396B (en) * | 2009-04-09 | 2011-01-12 | 北京佳讯飞鸿电气股份有限公司 | Application system for monitoring stress deformation of tunnel |
| CN101846639B (en) * | 2010-05-19 | 2012-03-14 | 云南三星机械设备制造股份有限公司 | Movable tunnel detection arm |
| WO2013150614A1 (en) * | 2012-04-03 | 2013-10-10 | 公益財団法人地震予知総合研究振興会 | Stress and strain detecting device |
| CN102914393B (en) * | 2012-09-28 | 2014-10-29 | 山东科技大学 | Active pressure-bearing type positioning borehole stress meter and use method thereof |
| CN102901474B (en) * | 2012-10-10 | 2015-05-20 | 山东科技大学 | Mine drilling micro-displacement measuring instrument |
| CN106052629B (en) * | 2016-07-15 | 2018-09-11 | 重庆大学 | A kind of coal seam with gas dilatancy measurement method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2031915U (en) * | 1988-07-28 | 1989-02-01 | 中国科学院南京天文仪器厂 | Multipurpose grating measuring apparatus |
| CN1654936A (en) * | 2005-03-04 | 2005-08-17 | 南开大学 | Readable force application component for stressed long-period fiber gratings |
| CN2773620Y (en) * | 2005-03-17 | 2006-04-19 | 安里千 | Displacement sensor |
-
2006
- 2006-06-02 CN CNB2006100833222A patent/CN100383507C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2031915U (en) * | 1988-07-28 | 1989-02-01 | 中国科学院南京天文仪器厂 | Multipurpose grating measuring apparatus |
| CN1654936A (en) * | 2005-03-04 | 2005-08-17 | 南开大学 | Readable force application component for stressed long-period fiber gratings |
| CN2773620Y (en) * | 2005-03-17 | 2006-04-19 | 安里千 | Displacement sensor |
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| CN1851426A (en) | 2006-10-25 |
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