CN102538839A - Novel optical fiber sensing device capable of adjusting in the field - Google Patents
Novel optical fiber sensing device capable of adjusting in the field Download PDFInfo
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- CN102538839A CN102538839A CN2010105872588A CN201010587258A CN102538839A CN 102538839 A CN102538839 A CN 102538839A CN 2010105872588 A CN2010105872588 A CN 2010105872588A CN 201010587258 A CN201010587258 A CN 201010587258A CN 102538839 A CN102538839 A CN 102538839A
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Abstract
The invention discloses a novel optical fiber sensing device capable of adjusting in the field. The novel optical fiber sensing device comprises a shell, a curved bracket arranged inside the shell, a first optical fiber connector and a second optical fiber connector which are both arranged at the external left side of the shell, wherein the shell is internally provided with a first wedged block; a reset spring is arranged between the upper end of the first wedged block and the inner wall of the shell; the lower end of the first wedged block is provided with a second wedged block which is in sliding match with the first wedged block; an adjusting screw rod is arranged at the right side of the shell; two opposite surfaces at the inner side of the curved bracket are respectively provided with a plurality of first deformation teeth and a plurality of second deformation teeth; a curved channel through which two signal optical fiber passes through is arranged between the heads of the first deformation teeth and the second deformation teeth; one of the two signal optical fiber is calibration signal optical fiber, and the other of the two signal optical fiber is first signal optical fiber; and two ends of the calibration signal optical fiber are respectively connected with the first optical fiber connector and the second optical fiber connector. The novel optical fiber sensing device disclosed by the invention is realized by using a parallel dual-signal optical fiber structure, and coordinated with the adjustment of the adjusting screw rod and the two wedged blocks, therefore the oblique adjustment and calibration in the field can be realized.
Description
Technical field
A kind of fibre-optical sensing device of the present invention especially relates to a kind of novel on-the-spot scalable fibre-optical sensing device.
Background technology
The connecting line of traditional electric signal sensing device continues fairly simple, just can make the termination of two connecting lines be fixed in one through simple crimping and accomplish connection, its connection with break off after the work that is connected again relatively simple; And the connection of two optical fiber is just tired much more difficult; Telecommunication optical fiber covering external diameter commonly used is 125 microns; The fibre core of single-mode fiber only has the 8-9 micron, when continuing, requires the deviation of fibre core to be not more than 1 micron, and this needs special heat sealing machine ability complete connection; And need the dish of protection and extreme care of heat-shrinkable T bush fine and fixing, fiber number need double more for a long time careful and meticulous.
The optical fiber micro-bending sensing device is the most simply one of fibre-optical sensing device of structure; It is with combination just can constitute a distributed or quasi-distributed optical fiber sensor-based system as the optical time domain reflectometer (OTDR) of pick-up unit; Use for guaranteeing the stable, reliable of Fibre Optical Sensor unit; Usually with signal optical fibre in the fibre-optical sensing device and fixedly welding of Transmission Fibers, thus make through the existing connection of breaking off sensing device carry out that the detection calibration cost of Field adjustment is higher, complicated operation and consume many times.On the other hand; The optical fiber micro-bending sensing device is had relatively high expectations to assembly precision, perhaps is that calibration is qualified when dispatching from the factory, but to the on-the-spot back of use or through after long-distance transportation and installing; Owing to multiple factor affecting such as temperature, vibration, housing distortion are had to and need adjusted once more and calibrate; The possibility that this situation occurs after installation is can be bigger, and the sensing device in the distributed or quasi-distributed optical fiber sensing system possibly be distributed in the scope of hundreds of rice, several kilometers or even tens of kilometers, if adjustment and certainly will the more manpower and materials of needs input in the machine room monitoring of being separated by very far away at the scene; Link up also relatively more difficult; Particularly in the open air under the situation, some area even be not moved signal and cover, this has all caused its efficient very low; Yet along with increasing and the expansion of monitoring range of distributed or accurate compartment system; This phenomenon also can increase, thus need a kind of fibre-optical sensing device that need not break off to be connected the just on-the-spot fibre-optical sensing device that just can regulate, test and calibrate under the situation with Transmission Fibers, to improve maintainability based on the distributed of little curved principle or quasi-distributed optical fiber sensor-based system.
Summary of the invention
Technical matters to be solved by this invention is to above-mentioned deficiency of the prior art; A kind of novel on-the-spot scalable fibre-optical sensing device is provided, and it adopts the structure of parallel dual signal optical fiber to realize, and cooperates adjustment screw rod and two wedges to regulate; Have simple in structure, reasonable in design, cost is low and use-pattern is flexible, result of use is good; Can on-the-spotly adjust and calibration, the normal operation of the assurance system that increases work efficiency has characteristics easy to adjust simultaneously.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: a kind of novel on-the-spot scalable fibre-optical sensing device; It is characterized in that: comprise housing, be fixedly mounted on enclosure interior the shaped form support, be arranged on the joints of optical fibre one and the joints of optical fibre two in outside left side; Said enclosure interior also is provided with the wedge one that supplies said shaped form support bottom to install, and is provided with the back-moving spring of exerting pressure to wedge one between said wedge one upper end and the inner walls, and said wedge one lower end is provided with the wedge two that is slidingly matched with it; Said wedge two is positioned at enclosure interior; Said housing right side is installed with the adjustment screw rod, and the connected mode of said adjustment screw rod and housing is for being threaded, and said adjustment screw rod end is connected with wedge two; Said shaped form bracket clamp is contained between wedge one and the inner walls; Be respectively arranged with a plurality of distortion teeth one and a plurality of distortion teeth two on inboard two the relative faces of said shaped form support; Said distortion tooth one with the distortion tooth two between the corresponding laying of interleaved; Form between the head of said distortion tooth one and distortion tooth two and supply two shaped form passages that signal optical fibre passes, said signal optical fibre is located in said shaped form channel interior, and one is calibrating signal optical fiber in the said signal optical fibre; Another root is a signal optical fibre one; Said calibrating signal optical fiber two ends connect the joints of optical fibre one and the joints of optical fibre two respectively, and said signal optical fibre one joins through optical cable and test cell, and said test cell is the connection processing unit also.
Above-mentioned a kind of novel on-the-spot scalable fibre-optical sensing device; It is characterized in that: be provided with auxiliary spring between said shaped form support upper surface and the inner walls; Be installed with oscillator between said auxiliary spring lower end and the said shaped form support upper end, said shaped form bracket clamp is contained between oscillator lower end and the wedge one.
Above-mentioned a kind of novel on-the-spot scalable fibre-optical sensing device is characterized in that: the said joints of optical fibre one all are fixed on the housing with the joints of optical fibre two or all are positioned at headspace inside, and said headspace is arranged on the hull outside wall.
Above-mentioned a kind of novel on-the-spot scalable fibre-optical sensing device is characterized in that: said housing upper end is equipped with feeler lever, and said feeler lever and housing are slidingly matched, and said feeler lever lower end is fixedly connected with said shaped form support upper end.
Above-mentioned a kind of novel on-the-spot scalable fibre-optical sensing device is characterized in that: be laid with bleeder vent on the said housing, said distortion tooth one is all or part of to be function distortion tooth, and said distortion tooth two is all or part of to be out of shape tooth for function.
Above-mentioned a kind of novel on-the-spot scalable fibre-optical sensing device; It is characterized in that: an end of said calibrating signal optical fiber connects light reflecting device; The said light reflecting device other end connects 1 mouthful of 1X2 photo-coupler; 2 mouthfuls of said 1X2 photo-coupler connect two optical fiber respectively, and the termination of said two optical fiber connects the joints of optical fibre one and the joints of optical fibre two respectively.
Above-mentioned a kind of novel on-the-spot scalable fibre-optical sensing device is characterized in that: said light reflecting device is light reflection mirror, fiber grating or the optical fiber that contains bubble.
Above-mentioned a kind of novel on-the-spot scalable fibre-optical sensing device is characterized in that: said shaped form support is shaped form housing, spring, serrate support or corrugated tube.
The present invention compared with prior art has the following advantages:
1, simple in structure, processing and fabricating is easy, input cost is low and use-pattern is flexible, highly sensitive.
2, two signal optical fibres protecting on the curved bracket in fibre-optical sensing device are in identical state basically; Just know the situation of sensing as long as detect the state of calibrating signal optical fiber like this, through regulating the state that the adjustment screw rod just can the field change signal optical fibre with signal optical fibre.
3, adopt light source-light power meter to connect at the scene respectively at two joints of optical fibre of the calibrating signal optical fiber on the fibre-optical sensing device; Just can know the state of calibrating signal optical fiber; Owing to the state of signal optical fibre is identical with the state of calibrating signal optical fiber, then also known simultaneously the state of signal optical fibre, regulate the adjustment screw rod is also monitored calibrating signal optical fiber with light source-light power meter state; Just adjust the state of signal optical fibre; The method of adjustment of this device is operation completion at the scene all, has reduced cost significantly, has improved work efficiency.
3, through being installed, light reflecting device reaches the purpose that improves measurement sensitivity and precision on calibrating signal optical fiber.
4, through cooperating adjustment screw rod and two wedges to regulate, not only can realize oblique side adjustment, and the normal operation of the assurance system that increases work efficiency, have characteristics easy to adjust simultaneously.
5, if the position is carried out suitable sign and just can be searched more easily and need the fibre-optical sensing device adjusted near the housing of fibre-optical sensing device or stationary housing, further raise the efficiency.
In sum, the characteristics that the present invention has is simple in structure, reasonable in design, cost is low and use-pattern is flexible, result of use is good can on-the-spot adjustment and calibration, and the normal operation of the assurance system that increases work efficiency has wide market application prospect simultaneously.
Through accompanying drawing and embodiment, the present invention is done further detailed description below.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the inner structure synoptic diagram of shaped form support among the embodiment 1.
Fig. 3 is the structural representation of embodiment 2.
Fig. 4 is the inner structure synoptic diagram of shaped form support among the embodiment 2.
Fig. 5 is the structural representation of embodiment 3.
Fig. 6 is the local structure for amplifying synoptic diagram at A place among Fig. 5.
Fig. 7 is the structural representation of embodiment 4.
Fig. 8 is the structural representation of embodiment 5.
Fig. 9 is the structural representation of embodiment 6.
Figure 10 is the inner structure synoptic diagram of shaped form support among the embodiment 6.
Figure 11 is the structural representation of embodiment 7.
Description of reference numerals:
The 1-optical cable; The 2-oscillator; The 3-feeler lever;
4-1-is out of shape tooth one; 4-2-is out of shape tooth two; The 5-test cell;
The 7-processing unit; The 8-headspace; The 9-housing;
10-sensitive material layer; The 11-joints of optical fibre one; The 12-joints of optical fibre two;
15-wedge one; 16-adjusts screw rod; 17-wedge two;
19-shaped form housing; The 20-fibre-optical sensing device; The 21-auxiliary spring;
The 22-point of fixity; The 23-back-moving spring; 33-signal optical fibre one;
The 34-bleeder vent; 35-calibrating signal optical fiber; The 36-gullet plate;
The 37-1X2 photo-coupler; The 38-spring; The 39-light reflecting device;
The 40-corrugated tube; The 41-tube wall.
Embodiment
Embodiment 1
A kind of novel on-the-spot scalable fibre-optical sensing device as illustrated in fig. 1 and 2; Comprise housing 9, be fixedly mounted on housing 9 inner shaped form support, the joints of optical fibre 1 that are arranged on housing 9 outer left side and the joints of optical fibre 2 12; Said housing 9 inside also are provided with the wedge 1 that supplies said shaped form support bottom to install; Be provided with the back-moving spring 23 of exerting pressure between said wedge one 15 upper ends and housing 9 inwalls to wedge 1; Said wedge one 15 lower ends are provided with the wedge 2 17 that is slidingly matched with it, and said wedge 2 17 is positioned at housing 9 inside, and said housing 9 right sides are installed with adjustment screw rod 16; The connected mode of said adjustment screw rod 16 and housing 9 is for being threaded, and said adjustment screw rod 16 ends are connected with wedge 2 17; Said shaped form bracket clamp is contained between wedge 1 and housing 9 inwalls; Be respectively arranged with a plurality of distortion tooth one 4-1 and a plurality of distortion tooth two 4-2 on inboard two the relative faces of said shaped form support; The corresponding laying of interleaved between said distortion tooth one 4-1 and distortion tooth two 4-2; Form between the head of said distortion tooth one 4-1 and distortion tooth two 4-2 and supply two shaped form passages that signal optical fibre passes, said signal optical fibre is located in said shaped form channel interior, and one is calibrating signal optical fiber 35 in the said signal optical fibre; Another root is a signal optical fibre 1; Said calibrating signal optical fiber 35 two ends connect the joints of optical fibre 1 and the joints of optical fibre 2 12 respectively, and said signal optical fibre 1 joins through optical cable 1 and test cell 5, and said test cell 5 is connection processing unit 7 also.
In the present embodiment, said shaped form support is a shaped form housing 19, and a plurality of distortion tooth one 4-1 and a plurality of distortion tooth two 4-2 correspondences are laid on the inwall of shaped form housing 19.Preferably; Clamping has two signal optical fibres between distortion tooth one 4-1 that lay relative both sides in said shaped form housing 19 and distortion tooth two 4-2; One is calibrating signal optical fiber 35 in the said signal optical fibre, and another root is a signal optical fibre 1, and these calibrating signal optical fiber 35 two ends connect the joints of optical fibre 1 and the joints of optical fibre 2 12 respectively; Said signal optical fibre 1 joins through optical cable 1 and test cell 5, and said test cell 5 is connection processing unit 7 also.The said joints of optical fibre 1 all are fixed on the housing 9 with the joints of optical fibre 2 12 or all are positioned at headspace 8 inside, and said headspace 8 is arranged on housing 9 lateral walls, and are preferred, and headspace 8 has the lid that can remove.At the scene during detection calibration; Use light source-light power meter to be connected with the joints of optical fibre 2 12 with the joints of optical fibre 1 through optical patchcord respectively; And the screw rod 16 of scalable adjustment simultaneously makes the position change of wedge 1; Thereby the distance at shaped form housing 19 two ends is changed, and then the signal optical fibre 1 that comprises in the shaped form housing 19 and the bending curvature of calibrating signal optical fiber 35 are changed, thereby reach the purpose of test and calibration; Because signal optical fibre 1 and calibrating signal optical fiber 35 are between distortion tooth one 4-1 and distortion tooth two 4-2 that is held on side by side in the shaped form housing 19; Signal optical fibre 1 is identical with the state of calibrating signal optical fiber 35, and the state that then records calibrating signal optical fiber 35 just can be learnt the state of signal optical fibre 1, thereby can carry out the on-the-spot detection calibration to signal optical fibre 1.Preferably, calibrating signal optical fiber 35 can be coiled in the headspace 8, when needs are tested, the termination joints of optical fibre of calibrating signal optical fiber 35 directly is plugged on the test instrumentation detects, and can save the use optical patchcord like this.
Preferably; Be provided with auxiliary spring 21 between said shaped form support upper surface and housing 9 inwalls; Be installed with oscillator 2 between said auxiliary spring 21 lower ends and the said shaped form support upper end, said shaped form bracket clamp is contained between oscillator 2 lower ends and the wedge 1.
Among the present invention, between housing 9 inwalls and wedge one 15 upper ends, be installed with back-moving spring 23, the variation of wedge 2 17 positions obtains so that the motion of wedge 1 is based on, and can reduce the influence of vibration to this fibre-optical sensing device 20.
Said signal optical fibre 1 is the optical fiber that the outside is surrounded by multi-protective layer with calibrating signal optical fiber 35.
The external packets of said signal optical fibre 1 and calibrating signal optical fiber 35 is covered with one deck waterproof layer.
Preferably, said signal optical fibre 1 and 35 employings of calibrating signal optical fiber is special optical fibers such as carbon coated fiber, thin footpath optical fiber.
Shown in Fig. 3 and 4; What present embodiment and embodiment 1 were different is: said curved bracket is for being spring 38; Distortion tooth one 4-1 and distortion tooth two 4-2 correspondences are laid in the spring 38 between the two adjacent rings spring wire, and distortion tooth one 4-1 and the interlaced laying of distortion tooth two 4-2.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
As illustrated in Figures 5 and 6; What present embodiment and embodiment 1 were different is: said curved bracket corrugated tube 40; In distortion tooth one 4-1 and distortion tooth two 4-2 correspondences are laid on the tube wall 41 of corrugated tube 40 on the two opposite side surfaces of recess, and distortion tooth one 4-1 and the interlaced laying of distortion tooth two 4-2.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
Embodiment 4
As shown in Figure 7; What present embodiment and embodiment 1 were different is: said curved bracket is the serrate support; And the serrate support is interlocked by two gullet plates 36 and forms, and is laid with distortion tooth one 4-1 and distortion tooth two 4-2 of interlaced correspondence on the opposite face of two gullet plates 36.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
As shown in Figure 8, what present embodiment and embodiment 1 were different is: said housing 9 upper ends are equipped with feeler lever 3, and said feeler lever 3 is slidingly matched with housing 9, are fixedly connected on said feeler lever 3 lower ends and the said shaped form support.Preferably, between the upper end of feeler lever 3 bottoms and shaped form housing 19, be mounted with auxiliary spring 21, the lower end of auxiliary spring 21 is connected through point of fixity 22 with shaped form housing 19.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
Embodiment 6
Shown in Fig. 9 and 10, what present embodiment and embodiment 1 were different is: be laid with bleeder vent 34 on the said housing 9, said distortion tooth one 4-1 is all or part of to be function distortion tooth, and said distortion tooth two 4-2 are all or part of to be out of shape tooth for function.Plating has sensitive material layer 10 on the surface of distortion tooth one 4-1 and distortion tooth two 4-2, can monitor gas to be monitored or liquid like this.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
Shown in figure 11; What present embodiment and embodiment 1 were different is: an end of said calibrating signal optical fiber 35 connects light reflecting device 39; Said light reflecting device 39 other ends connect 1 mouthful of 1X2 photo-coupler 37; 2 mouthfuls of said 1X2 photo-coupler 37 connect two optical fiber respectively, and the termination of said two optical fiber connects the joints of optical fibre 1 and the joints of optical fibre 2 12 respectively.Said light reflecting device 39 is light reflection mirror, fiber grating or the optical fiber that contains bubble.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every technical spirit changes any simple modification, change and the equivalent structure that above embodiment did according to the present invention, all still belongs in the protection domain of technical scheme of the present invention.
Claims (8)
1. novel on-the-spot scalable fibre-optical sensing device; It is characterized in that: comprise housing (9), be fixedly mounted on housing (9) inner shaped form support, the joints of optical fibre one (11) that are arranged on housing (9) outer left side and the joints of optical fibre two (12); The inner wedge one (15) that supplies said shaped form support bottom to install that also is provided with of said housing (9); Be provided with the back-moving spring (23) of exerting pressure between said wedge one (15) upper end and housing (9) inwall to wedge one (15); Said wedge one (15) lower end is provided with the wedge two (17) that is slidingly matched with it; Said wedge two (17) is positioned at housing (9) inside; Said housing (9) right side is installed with adjustment screw rod (16), and the connected mode of said adjustment screw rod (16) and housing (9) is for being threaded, and said adjustment screw rod (16) end is connected with wedge two (17); Said shaped form bracket clamp is contained between wedge one (15) and housing (9) inwall; Be respectively arranged with a plurality of distortion teeth one (4-1) and a plurality of distortion tooth two (4-2) on inboard two the relative faces of said shaped form support; The corresponding laying of interleaved between said distortion tooth one (4-1) and distortion tooth two (4-2); Form between the head of said distortion tooth one (4-1) and distortion tooth two (4-2) and supply two shaped form passages that signal optical fibre passes; Said signal optical fibre is located in said shaped form channel interior; One is calibrating signal optical fiber (35) in the said signal optical fibre, and another root is a signal optical fibre one (33), and said calibrating signal optical fiber (35) two ends connect the joints of optical fibre one (11) and the joints of optical fibre two (12) respectively; Said signal optical fibre one (33) joins through optical cable (1) and test cell (5), and said test cell (5) is connection processing unit (7) also.
2. according to the described a kind of novel on-the-spot scalable fibre-optical sensing device of claim 1; It is characterized in that: be provided with auxiliary spring (21) between said shaped form support upper surface and housing (9) inwall; Be installed with oscillator (2) between said auxiliary spring (21) lower end and the said shaped form support upper end, said shaped form bracket clamp is contained between oscillator (2) lower end and the wedge one (15).
3. according to the described a kind of novel on-the-spot scalable fibre-optical sensing device of claim 1; It is characterized in that: the said joints of optical fibre one (11) and the joints of optical fibre two (12) all are fixed on the housing (9) or all are positioned at headspace (8) inside, and said headspace (8) is arranged on housing (9) lateral wall.
4. according to the described a kind of novel on-the-spot scalable fibre-optical sensing device of claim 1; It is characterized in that: said housing (9) upper end is equipped with feeler lever (3); Said feeler lever (3) is slidingly matched with housing (9), and said feeler lever (3) lower end is fixedly connected with said shaped form support upper end.
5. according to the described a kind of novel on-the-spot scalable fibre-optical sensing device of claim 1; It is characterized in that: be laid with bleeder vent (34) on the said housing (9); Said distortion tooth one (4-1) is all or part of to be function distortion tooth, and said distortion tooth two (4-2) is all or part of to be that function is out of shape tooth.
6. according to the described a kind of novel on-the-spot scalable fibre-optical sensing device of claim 1; It is characterized in that: an end of said calibrating signal optical fiber (35) connects light reflecting device (39); Said light reflecting device (39) other end connects 1 mouthful of 1X2 photo-coupler (37); 2 mouthfuls of said 1X2 photo-coupler (37) connect two optical fiber respectively, and the termination of said two optical fiber connects the joints of optical fibre one (11) and the joints of optical fibre two (12) respectively.
7. according to the described a kind of novel on-the-spot scalable fibre-optical sensing device of claim 6, it is characterized in that: said light reflecting device (39) is light reflection mirror, fiber grating or the optical fiber that contains bubble.
8. according to the described a kind of novel on-the-spot scalable fibre-optical sensing device of claim 1, it is characterized in that: said shaped form support is shaped form housing, spring, serrate support or corrugated tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105872588A CN102538839A (en) | 2010-12-15 | 2010-12-15 | Novel optical fiber sensing device capable of adjusting in the field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105872588A CN102538839A (en) | 2010-12-15 | 2010-12-15 | Novel optical fiber sensing device capable of adjusting in the field |
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| CN102538839A true CN102538839A (en) | 2012-07-04 |
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| CN2010105872588A Pending CN102538839A (en) | 2010-12-15 | 2010-12-15 | Novel optical fiber sensing device capable of adjusting in the field |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103671374A (en) * | 2013-12-17 | 2014-03-26 | 华南理工大学 | Wedge block pre-tightening mechanism of stacking-type piezoelectric ceramic driver and pre-tightening method thereof |
| CN103759909A (en) * | 2014-01-20 | 2014-04-30 | 长城汽车股份有限公司 | Device and method for detecting rubber shield air tightness |
| CN105197790A (en) * | 2015-10-30 | 2015-12-30 | 湖州洋西起重设备有限公司 | Novel double-supporting plate cable pulley head end |
| CN105217446A (en) * | 2015-10-30 | 2016-01-06 | 湖州洋西起重设备有限公司 | A kind of double bracket plate Head end of cable pulley |
| CN106597618A (en) * | 2016-10-09 | 2017-04-26 | 中国人民解放军63835部队 | Optical fiber splice closure with differential micro-bending inductor |
| CN114034886A (en) * | 2021-09-23 | 2022-02-11 | 中国船舶重工集团公司第七0九研究所 | Test connector with self-adaptive adjustment of pin pitch |
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2010
- 2010-12-15 CN CN2010105872588A patent/CN102538839A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671374A (en) * | 2013-12-17 | 2014-03-26 | 华南理工大学 | Wedge block pre-tightening mechanism of stacking-type piezoelectric ceramic driver and pre-tightening method thereof |
| CN103759909A (en) * | 2014-01-20 | 2014-04-30 | 长城汽车股份有限公司 | Device and method for detecting rubber shield air tightness |
| CN103759909B (en) * | 2014-01-20 | 2016-08-17 | 长城汽车股份有限公司 | A kind of rubber guard shield air-tightness detection device and detection method |
| CN105197790A (en) * | 2015-10-30 | 2015-12-30 | 湖州洋西起重设备有限公司 | Novel double-supporting plate cable pulley head end |
| CN105217446A (en) * | 2015-10-30 | 2016-01-06 | 湖州洋西起重设备有限公司 | A kind of double bracket plate Head end of cable pulley |
| CN106597618A (en) * | 2016-10-09 | 2017-04-26 | 中国人民解放军63835部队 | Optical fiber splice closure with differential micro-bending inductor |
| CN106597618B (en) * | 2016-10-09 | 2019-07-23 | 中国人民解放军63835部队 | A kind of optical cable connecting box with the micro-bend inductor of differential type |
| CN114034886A (en) * | 2021-09-23 | 2022-02-11 | 中国船舶重工集团公司第七0九研究所 | Test connector with self-adaptive adjustment of pin pitch |
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Application publication date: 20120704 |