CN215895653U - Impact calibration device of distributed buried optical fiber vibration security early warning system - Google Patents
Impact calibration device of distributed buried optical fiber vibration security early warning system Download PDFInfo
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- CN215895653U CN215895653U CN202023263171.3U CN202023263171U CN215895653U CN 215895653 U CN215895653 U CN 215895653U CN 202023263171 U CN202023263171 U CN 202023263171U CN 215895653 U CN215895653 U CN 215895653U
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- 230000005484 gravity Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims 1
- 238000004080 punching Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 238000009863 impact test Methods 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model provides an impact calibration device of a distributed buried optical fiber vibration security early warning system, which has good repeatability and controllable impact energy and can effectively solve the problem that the existing calibration method or impact test device is not suitable for calibrating the distributed buried optical fiber vibration security early warning system. The impact calibration device comprises: the device comprises a mobile platform, a test board, a conduit and an impact ball; the test bench is fixed on the movable platform, and the guide pipe is vertically inserted into the test bench to ensure that the guide pipe is always in a vertical state; and a through hole is formed in the position, vertically opposite to the guide pipe, of the moving platform, and the guide pipe and the through hole are used for allowing the impact ball to pass through when falling freely.
Description
Technical Field
The utility model relates to a calibration device, in particular to an impact calibration device for calibrating a distributed buried optical fiber security early warning system.
Background
The distributed buried optical fiber vibration security early warning system takes an optical cable as a sensing device and is used for detecting vibration caused by various actions acting on the optical cable and nearby the optical cable. In practical application, the system response is different under the influence of uncertain factors of the burying mode and the soil condition. Therefore, a device with good repeatability and controllable impact energy is needed to calibrate the sensitivity of the distributed buried optical fiber vibration security early warning system, so that the response of the system is consistent.
At present, no special impact calibration device exists in the market, the existing impact testing devices are all used for measuring the impact strength of the surface of a material and are classified according to impact types, and the existing impact testing devices mainly comprise spring impact devices, ball falling (hammer) impact devices and hydraulic impact devices.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model provides an impact calibration device for a distributed buried optical fiber vibration security early warning system, which has good repeatability and controllable impact energy and can effectively solve the problem that the existing calibration method or impact test device is not suitable for calibrating the distributed buried optical fiber vibration security early warning system.
The impact calibration device of the distributed buried optical fiber vibration security early warning system comprises: the device comprises a mobile platform, a test board, a conduit and an impact ball;
the test bench is fixed on the movable platform, and the guide pipe is vertically inserted into the test bench to ensure that the guide pipe is always in a vertical state;
and a through hole is formed in the position, vertically opposite to the guide pipe, of the moving platform, and the guide pipe and the through hole are used for allowing the impact ball to pass through when falling freely.
Preferably: further comprising: a movable operating lever; one end of the movable operating rod extends into the guide pipe and is used for supporting the impact ball; the guide pipe is provided with a window extending along the vertical direction and used as a channel for the movable operating rod to move up and down, and the movable operating rod is moved up and down and used for adjusting the ground clearance of the impact ball;
the impact ball is supported or freely dropped by rotating the movable operating rod.
Preferably: the height adjusting mechanism is used for driving the movable operating rod to move up and down.
Preferably: the height adjustment mechanism includes: the device comprises more than two supporting rods, more than two adjusting bolts and an adjusting plate, wherein the more than two supporting rods are horizontally supported on the test bench, and one adjusting bolt is vertically screwed in a threaded hole of each supporting rod;
the adjusting plate is sleeved on the guide pipe and the test bench and is in sliding fit with the guide pipe and the test bench; the adjusting plate vertically moves along the guide pipe and the test bench under the action of the two adjusting bolts; the movable operating rod is connected to the adjusting plate.
Preferably: the impact ball is a solid round ball formed by a rubber surface and an internal filler.
Preferably: the moving platform is a flat car.
Preferably: the impact energy is adjusted by adjusting the weight of the impact ball.
Has the advantages that:
(1) the impact calibration device has the advantages of controllable impact energy, good repeatability and convenient movement, and is suitable for being used under various outdoor conditions.
(2) The impact calibration device generates impact energy in a mode of impact ball free falling, and can quantify artificial simulated active random impact into standard impact, so that objective basis is provided for sensitivity evaluation of the distributed buried optical fiber vibration security and protection early warning system under different application conditions.
(3) Impact energy with different sizes can be generated by adjusting the ground clearance of a movable operating rod for supporting impact balls through a height adjusting mechanism.
(4) The gravity potential energy of the impact ball can be adjusted by directly adjusting the weight of the impact ball, so that impact energy with different sizes is generated.
Drawings
FIG. 1 is a schematic perspective view of an impact calibration device of a distributed buried optical fiber vibration security early warning system;
FIG. 2 is a front view of the impact calibration apparatus shown in FIG. 1;
FIG. 3 is a top view of the impact calibration apparatus shown in FIG. 1;
fig. 4 is a signal trend plot for a set of test recordings.
In the figure: 1-a flat car; 2-a test bench; 3-a catheter; 4-a movable operating lever; 5-a support rod; 6-adjusting the bolt; 7-adjusting plate.
Detailed Description
The utility model is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides an impact calibration device suitable for a distributed buried optical fiber vibration security early warning system.
As shown in fig. 1 to 3, the impact calibration apparatus includes: the impact calibration device comprises a flat car 1, a test board 2, a conduit 3 and an impact ball, wherein the flat car 1 is a moving platform of the impact calibration device, and a hand-push flat car is adopted in the embodiment; the test bench 2 is fixed on the flat car 1, and the guide pipe 3 is vertically inserted into the test bench 2, so that the guide pipe 3 is always in a vertical state; the position of the flat car 1 vertically opposite to the guide pipe 3 is provided with a through hole, and the guide pipe 3 and the through hole are used for allowing the impact ball to pass through when falling freely.
Further, the impact calibration device further comprises: the device comprises a movable operating rod 4 and a height adjusting mechanism arranged on the test bench 2, wherein the movable operating rod 4 is horizontally hinged on the height adjusting mechanism and is used for supporting impact balls; the height adjusting mechanism is used for adjusting the height of the movable operating rod 4 from the ground so as to adjust the height of the impact ball above the ground; the guide pipe 3 is provided with a window (as a channel for the movable operating rod 4 to move up and down) extending along the vertical direction, one end of the movable operating rod 4 extends into the window, and the impact ball arranged in the guide pipe 3 can stay on the window or freely fall off when the movable operating rod rotates to different positions, if the end part of the movable operating rod 4 is provided with an inner concave surface, when the inner concave surface faces upwards, the impact ball stays on the movable operating rod 4, and after the movable operating rod 4 rotates, the impact ball falls off from the movable operating rod 4 under the action of gravity.
Specifically, the method comprises the following steps: the height adjusting mechanism comprises two support rods 5, two adjusting bolts 6 and an adjusting plate 7, the two support rods 5 are horizontally and symmetrically arranged on the test board 2, the two adjusting bolts 6 are vertically screwed in threaded holes in the two horizontal support rods 5 respectively, the adjusting plate 7 is sleeved on the guide pipe 3 and the test board 2 (in sliding fit with the guide pipe 3 and the test board 2) and is supported on the two adjusting bolts 6, and the adjusting plate 7 can vertically move along the guide pipe 3 and the test board 2 under the action of the two adjusting bolts 6; the movable operating rod 4 is horizontally hinged on the adjusting plate 7. Therefore, the height h of the adjusting plate 7 from the ground can be controlled through the adjusting bolt 6 on the supporting rod 5, and impact energy with different sizes can be generated by matching with impact balls.
The impact ball is a solid sphere, the outer surface of the impact ball is made of rubber, and sand or other fillers are filled in the impact ball according to needs.
The working principle of the impact calibration device is as follows: impact energy is generated in a mode of free falling of the impact ball, and active random impact of artificial simulation can be quantified into standard impact, so that objective basis is provided for sensitivity evaluation of the distributed buried optical fiber vibration security early warning system under different application conditions.
The impact ball is arranged in a guide pipe 3 vertical to the ground and is supported by a movable operating rod 4; after the movable operating rod 4 is rotated, the impact ball loses the support and falls on the ground with the optical cable buried therein in a free-fall mode, and one-time impact is completed.
The movable operating rod 4 is horizontally hinged on a height adjusting mechanism for adjusting the height of the movable operating rod 4 from the ground, and the gravitational potential energy of the impact ball can be adjusted by adjusting the height of the movable operating rod 4 from the ground or/and the weight of the impact ball. Due to the support of the movable operating rod 4, the impact ball is in a static state before falling, the initial kinetic energy is zero, and therefore, the impact energy of the impact ball falling to the ground is in direct proportion to the mass of the impact ball and the height of the movable operating rod 4 from the ground.
The impact calibration device is suitable for a distributed buried optical fiber vibration security early warning system adopting an interference type optical fiber sensing technology, the security early warning system utilizes optical fiber to sense and detect vibration caused by falling of an impact ball, and light guide phase delay, namely phase change, is generated, so that output light intensity is changed, and the change of a physical field to be detected is obtained; and the method is also suitable for other interference type vibration optical fiber security systems.
The signal processing system collects and records the voltage value converted by the disturbance in real time, the sampling frequency is 10Hz, each group of tests is repeated for 5 times or more, and the recorded signal trend is shown in figure 4. Assuming that the maximum voltage value in one impact process represents the response value of the impact, the average value of 5 tests is taken as the system response value of the test point. The repeated operation mode can effectively eliminate errors in the test process.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a distributed buried fiber vibration security protection early warning system's impact calibration device which characterized in that includes: the device comprises a mobile platform, a test bench (2), a conduit (3) and a punching ball;
the test bench (2) is fixed on the mobile platform, and the guide pipe (3) is vertically inserted into the test bench (2) to ensure that the guide pipe (3) is always in a vertical state;
a through hole is formed in the position, vertically opposite to the guide pipe (3), of the moving platform, and the guide pipe (3) and the through hole are used for allowing the impact ball to pass through when falling freely;
further comprising: a movable operating lever (4); one end of the movable operating rod (4) extends into the guide pipe (3) and is used for supporting the impact ball; a window extending along the vertical direction is formed in the conduit (3) and serves as a channel for the movable operating rod (4) to move up and down, and the movable operating rod (4) is moved up and down and used for adjusting the ground clearance of the impact ball;
the end part of the movable operating rod (4) is provided with an inner concave surface, when the inner concave surface faces upwards, the impact ball stays on the movable operating rod (4), and after the movable operating rod (4) is rotated, the impact ball falls off from the movable operating rod (4) under the action of gravity; thereby supporting the impact ball or allowing the impact ball to fall freely by rotating the movable operating lever (4).
2. The impact calibration device of the distributed buried optical fiber vibration security and protection early warning system according to claim 1, wherein: the height adjusting mechanism is used for driving the movable operating rod (4) to move up and down.
3. The impact calibration device of the distributed buried optical fiber vibration security and protection early warning system according to claim 2, wherein: the height adjustment mechanism includes: the device comprises more than two supporting rods (5), more than two adjusting bolts (6) and an adjusting plate (7), wherein the more than two supporting rods (5) are horizontally supported on the test bench (2), and one adjusting bolt (6) is vertically screwed in a threaded hole of each supporting rod (5);
the adjusting plate (7) is sleeved on the guide pipe (3) and the test bench (2) and is in sliding fit with the guide pipe (3) and the test bench (2); the adjusting plate (7) vertically moves along the guide pipe (3) and the test bench (2) under the action of the two adjusting bolts (6); the movable operating rod (4) is connected to the adjusting plate (7).
4. The impact calibration device of the distributed buried optical fiber vibration security and protection early warning system according to any one of claims 1 to 3, wherein: the impact ball is a solid round ball formed by a rubber surface and an internal filler.
5. The impact calibration device of the distributed buried optical fiber vibration security and protection early warning system according to any one of claims 1 to 3, wherein: the moving platform is a flat car (1).
6. The impact calibration device of the distributed buried optical fiber vibration security and protection early warning system according to any one of claims 1 to 3, wherein: the impact energy is adjusted by adjusting the weight of the impact ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023263171.3U CN215895653U (en) | 2020-12-29 | 2020-12-29 | Impact calibration device of distributed buried optical fiber vibration security early warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023263171.3U CN215895653U (en) | 2020-12-29 | 2020-12-29 | Impact calibration device of distributed buried optical fiber vibration security early warning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215895653U true CN215895653U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023263171.3U Expired - Fee Related CN215895653U (en) | 2020-12-29 | 2020-12-29 | Impact calibration device of distributed buried optical fiber vibration security early warning system |
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| CN (1) | CN215895653U (en) |
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2020
- 2020-12-29 CN CN202023263171.3U patent/CN215895653U/en not_active Expired - Fee Related
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