CN111855046A - Optical fiber force measurement monitoring system - Google Patents
Optical fiber force measurement monitoring system Download PDFInfo
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- CN111855046A CN111855046A CN202010843978.XA CN202010843978A CN111855046A CN 111855046 A CN111855046 A CN 111855046A CN 202010843978 A CN202010843978 A CN 202010843978A CN 111855046 A CN111855046 A CN 111855046A
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- preset value
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 61
- 238000012544 monitoring process Methods 0.000 title claims abstract description 58
- 238000005259 measurement Methods 0.000 title claims abstract description 19
- 238000004458 analytical method Methods 0.000 claims description 28
- 230000003287 optical effect Effects 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 16
- 238000000418 atomic force spectrum Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003019 stabilising effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
- G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses an optical fiber force measurement monitoring system which is used for solving the problems that the existing support is still in a traditional form, an effective force measurement structure is not available, and a stable and accurate monitoring scheme is not available And (5) analyzing, evaluating and controlling.
Description
Technical Field
The invention belongs to the technical field of force measurement monitoring; relates to the optical fiber force measurement monitoring technology; in particular to an optical fiber force measurement monitoring system.
Background
With the rapid development of bridge engineering technology and large-scale building structures, people pay more attention to the safety and durability of bridges and large-scale buildings, and health monitoring systems are born, mainly acquire various data reflecting structure behaviors through sensing devices measuring various responses, and provide scientific reference basis for analyzing the health state of the structure and evaluating the reliability of the structure, but the existing support is still in a traditional form, and has no force measuring structure and a stable and accurate monitoring scheme.
Disclosure of Invention
The invention aims to provide an optical fiber force measurement monitoring system. The support is used for solving the problems that the existing support is still in a traditional form, and an effective force measuring structure and a stable and accurate monitoring scheme are not available.
The purpose of the invention can be realized by the following technical scheme:
an optical fiber force measurement monitoring system comprises a monitoring system, wherein the monitoring system consists of a pressure-bearing device and an optical fiber sensor force measurement system, and the pressure-bearing device consists of an upper pressure plate, a wedge-shaped ring, a lower pressure plate and a mounting groove;
the optical fiber sensor force measuring system consists of an optical fiber strain sensor, a stabilizing device, an optical cable II, a demodulation unit and a monitoring analysis control system platform;
the stabilizing device consists of a mounting plate, a stabilizing spring, a fixing plate and a circular shell;
the round shell is internally provided with a cavity, one side of the round shell is provided with a first opening, the other side of the round shell is provided with a second opening, the mounting plate is mounted inside the round shell and is tightly attached to one side of the round shell, which is provided with the second opening, a first mounting groove is formed in the round shell, a second mounting groove is formed in the mounting plate, the first mounting groove is arranged corresponding to the second mounting groove, a stabilizing spring is mounted between the first mounting groove and the second mounting groove, and the round shell is mounted on the mounting plate through a buckle;
the optical fiber strain sensors are arranged on the fixing plate, the stabilizing device is arranged on the surface of the pressure-bearing device, the optical fiber strain sensors are mutually connected together through optical cables to form an optical fiber strain sensor group, and the optical fiber strain sensor group is mutually connected with the demodulating unit through the optical cables;
the demodulation unit is connected to the monitoring analysis control system platform through an optical fiber wire, a wireless transmission device is arranged in the demodulation unit, a wireless transmission receiving device is arranged in the monitoring analysis control system platform, and the demodulation unit is connected to the monitoring analysis control system platform through the wireless transmission device and the wireless transmission receiving device.
Further, the optical fiber strain sensor passes through a formula
Calculating the selected wavelength;
the optical fiber strain sensor sends a strain signal to a demodulation unit, and the demodulation unit passes a formula
Obtaining the reflectivity FSli and the optical loss OPne of the sensor, wherein TCS and CTE are standard correction values of the optical fiber strain sensor of the current model, further obtaining the strain quantity of a strain signal, marking the strain quantity as YB, and comparing the strain quantity with a preset value in the optical fiber strain sensor, wherein the method comprises the following specific steps:
s1 through the formula
Obtaining a calibrated preset value YSZ, wherein TrefIs the current ambient light wavelength, TGSSCurrent ambient light intensity;
the monitoring analysis control system platform obtains T through the sunlight sensor and the infrared wavelength sensorrefAnd TGSS；
S2, comparing the preset calibrating value YSZ with a preset value;
when the calibrated preset value YSZ exceeds the preset value, the demodulation unit sends an alarm signal to the monitoring analysis control system platform;
when the YSZ does not exceed the preset value, the demodulation unit sends a demodulation signal to the monitoring analysis control system platform;
the demodulation signal comprises a calibration preset value YSZ, and the monitoring analysis control system platform passes through a formula
Obtaining a strain force curve graph; wherein a is the last calibration preset value;
further, the lower part of top board is equipped with slant face, first boss and second boss, the spacing hole groove clearance fit that first boss and holding down plate center were seted up, the hole clearance fit that second boss and wedge ring are inside to be seted up.
Further, the wedge ring is installed in the mounting groove, the upper and lower surface of wedge ring is provided with the slide mounting groove, and the circumference of wedge ring is provided with stabilising arrangement's mounting platform.
Further, the diameter of the second small opening is smaller than that of the first small opening.
Furthermore, the wireless transmission device is a GPRS wireless network card, and the wireless transmission receiving device is a GPRS wireless network card receiver.
Compared with the prior art, the invention has the beneficial effects that:
the existing support has a monitoring function by improving the existing support, and monitored data can be transmitted in real time or in stages by adding the optical fiber sensor force measuring system, so that loss caused by untimely data updating is avoided; the optical fiber sensor can work more stably and accurately by arranging the stabilizing device; the wireless transmission device and the wireless transmission receiving device are arranged, so that the optical fiber sensor force measuring system can monitor the running conditions of the support and the bridge in real time;
the adjacent surface of the wedge-shaped ring and the lower pressing plate is provided with a sliding plate groove, the sliding plate and the mounting groove on the lower pressing plate form a sliding pair, the inclined sliding plate and the inclined surface of the middle plate form a sliding pair, when the pressure-bearing device is stressed, the load is transmitted to the inclined surface of the wedge-shaped ring to generate inclined thrust on the wedge-shaped ring, so that the wedge-shaped ring generates radial and circumferential deformation, the microstrain is monitored by the optical fiber strain sensor 7 arranged on the circumferential step of the wedge-shaped ring and converted into the wavelength change of the reflected light wave signal, the wavelength change is transmitted to the demodulation unit 9 through the optical fiber cable, the demodulation unit 9 transmits the read light wave change data to the data processing terminal of the monitoring and analyzing control system platform through a wired or wireless network, and the monitoring, analyzing, evaluating and controlling work is carried out by.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of a fiber optic force measurement monitoring system;
FIG. 2 is a schematic structural view of a pressure-bearing device;
figure 3 is a cross-sectional view of the stabilizer.
In the figure: 1. an upper pressure plate; 2. a wedge ring; 3. a lower pressing plate; 4. a placing groove; 5. an optical cable; 6. a second optical cable; 7. an optical fiber strain sensor; 8. a securing device; 801. mounting a plate; 802. a stabilizing spring; 803. a fixing plate; 804. a circular housing; 9. a demodulation unit; 10. and monitoring, analyzing and controlling the system platform.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, the present invention discloses an optical fiber force measurement monitoring system, which comprises: pressure-bearing device and optical fiber sensor force measuring system. The pressure-bearing device is used for bearing load and installing and fixing the optical fiber strain sensor 7, when the pressure-bearing device bears the load, the vertical force can be decomposed into an inclined surface positive pressure and a radial force through a wedge surface, the optical fiber sensor force measuring system is used for measuring the micro strain generated in the circumferential direction after the pressure-bearing device is stressed, the micro strain is reflected into optical signal quantitative data, and the optical signal is converted into force data through the data processing terminal. Through optimizing the structure of wedge ring 2 and other members in the pressure-bearing device for bear vertical compression back, can be high-efficient accurate the conversion to the circumference of wedge ring 2 and meet an emergency, thereby through the high-efficient accurate monitoring atress size of optical fiber sensor force measuring system.
The optical fiber strain sensor 7 is installed on the fixing plate 803 of the stabilizing device 8, and when the external sudden shock occurs, the deformation absorption capacity of the stabilizing spring 802 is ensured, so that the optical fiber strain sensor 7 can stably work, and the monitored data is more reliable.
Securing device 8 comprises mounting panel 801, firm spring 802, fixed plate 803 and circular shell 804, circular shell 804 is inside hollow circular cylinder, the osculum has been seted up to one side of circular shell 804, mounting panel 801 installs the inside at circular shell 804, the osculum that circular shell 804 was seted up is hugged closely to a side of mounting panel 801, mounting groove one has been seted up in circular shell 804, mounting panel 801 has seted up mounting groove two, mounting groove one corresponds the setting with the mounting groove two, install firm spring 802 between mounting groove one and the mounting groove two, circular shell 804 passes through the buckle and installs on the mounting panel 801.
The pressure-bearing device comprises an upper pressure plate 1, an inclined plane sliding plate, a wedge-shaped ring 2 plane sliding plate, a mounting groove 4 and a lower pressure plate 3, wherein the sliding plate is mounted in the inclined plane and the lower surface groove, and the upper surface of the lower pressure plate 3 is provided with mirror surface stainless steel.
The lower part of the upper press plate 1 is provided with an inclined surface, a first boss and a second boss, the first boss is in clearance fit with the limiting hole groove of the lower press plate 3, the second boss is in clearance fit with the inner hole of the wedge-shaped ring 2, and the mutual limiting of the upper press plate 1, the wedge-shaped ring 2 and the lower press plate 3 is realized. The surface of the upper pressure plate 1 is processed by chromium plating and polishing, and the roughness of the inclined surface is less than MRRRamax0.8.
The upper surface and the lower surface of the wedge-shaped ring 2 are provided with sliding plate mounting grooves, the optical fiber sensor mounting platform is circumferentially arranged, and the inclined plane included angle of the wedge-shaped ring 2 is 10-35 degrees.
The second optical cable 6 is the tail end of the optical fiber strain sensor 7, the model of the demodulation unit 9 is JEME-iFBJ-D, the model of the optical fiber strain sensor 7 is JFSS-04, the monitoring analysis control system platform 10 is patent CN103984323B, and the CORE part is a CORE module disclosed by the integrated configurable industrial information monitoring analysis control system.
The adjacent surface of the wedge-shaped ring 2 and the lower press plate 3 is provided with a slide plate groove, a slide plate is arranged to form a sliding pair with the placing groove 4 on the lower press plate 3, the inclined slide plate is arranged on the wedge-shaped ring 2 to form a sliding pair with the inclined surface of the middle plate, when the pressure-bearing device is stressed, the load is transferred to the inclined surface of the wedge-shaped ring 2, generates oblique thrust to the wedge-shaped ring 2, so that the wedge-shaped ring 2 generates radial and circumferential deformation, monitors micro-strain through an optical fiber strain sensor 7 arranged on a circumferential step of the wedge-shaped ring 2, converts the micro-strain into wavelength change of a reflected light wave signal, the light wave change data is transmitted to the demodulation unit 9 through the optical cable 5, the demodulation unit 9 transmits the read light wave change data to a data processing terminal of the monitoring analysis control system platform 10 through a wired or wireless network, and the monitoring analysis control system platform 10 carries out related monitoring, analysis, evaluation and control work.
The optical fiber strain sensor 7 passes the formula
Calculating the selected wavelength;
the optical fiber strain sensor 7 sends the strain signal to a demodulation unit 9, and the demodulation unit 9 passes the formula
Obtaining the reflectivity FSli and the optical loss OPne of the sensor, wherein TCS and CTE are standard correction values of the optical fiber strain sensor 7 of the current model, further obtaining the strain quantity of the strain signal, marking the strain quantity as YB, and comparing the strain quantity with a preset value in the optical fiber strain sensor 7, wherein the method specifically comprises the following steps:
s1 through the formula
Obtaining a calibrated preset value YSZ, wherein TrefIs the current ambient light wavelength, TGSSCurrent ambient light intensity;
the monitoring analysis control system platform 10 obtains T through the sunlight sensor and the infrared wavelength sensorrefAnd TGSS；
S2, comparing the preset calibrating value YSZ with a preset value;
when the calibrated preset value YSZ exceeds the preset value, the demodulation unit 9 sends an alarm signal to the monitoring analysis control system platform 10;
when the calibrated preset value YSZ does not exceed the preset value, the demodulation unit 9 sends a demodulation signal to the monitoring analysis control system platform 10;
the demodulation signal comprises a calibration preset value YSZ, and the monitoring analysis control system platform 10 adopts a formula
Obtaining a strain force curve graph; wherein a is the last calibration preset value;
the invention is implemented specifically as follows: the adjacent surface of the wedge-shaped ring 2 and the lower press plate 3 is provided with a slide plate groove, a slide plate is arranged to form a sliding pair with the placing groove 4 on the lower press plate 3, the inclined slide plate is arranged on the wedge-shaped ring 2 to form a sliding pair with the inclined surface of the middle plate, when the pressure-bearing device is stressed, the load is transferred to the inclined surface of the wedge-shaped ring 2, generates oblique thrust to the wedge-shaped ring 2, so that the wedge-shaped ring 2 generates radial and circumferential deformation, monitors micro-strain through an optical fiber strain sensor 7 arranged on a circumferential step of the wedge-shaped ring 2, converts the micro-strain into wavelength change of a reflected light wave signal, the light wave change data is transmitted to a demodulation unit 9 through an optical cable 5, the demodulation unit 9 transmits the read light wave change data to a data processing terminal of a monitoring analysis control system platform 10 through a wired or wireless network, and the monitoring analysis control system platform 10 carries out related monitoring, analysis, evaluation and control work;
the existing support has a monitoring function by improving the existing support, and monitored data can be transmitted in real time or in stages by adding the optical fiber sensor force measuring system, so that loss caused by untimely data updating is avoided; the optical fiber sensor can work more stably and accurately by arranging the stabilizing device; the wireless transmission device and the wireless transmission receiving device are arranged, so that the optical fiber sensor force measuring system can monitor the running conditions of the support and the bridge in real time;
the preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. An optical fiber force measurement monitoring system comprises a monitoring system and is characterized in that the monitoring system consists of a pressure-bearing device and an optical fiber sensor force measurement system, wherein the pressure-bearing device consists of an upper pressure plate (1), a wedge-shaped ring (2), a lower pressure plate (3) and a mounting groove (4);
the optical fiber sensor force measuring system consists of an optical fiber strain sensor (7), a stabilizing device (8), an optical cable (5), an optical cable II (6), a demodulation unit (9) and a monitoring analysis control system platform (10);
the stabilizing device (8) consists of a mounting plate (801), a stabilizing spring (802), a fixing plate (803) and a circular shell (804);
the round shell (804) is internally provided with a cavity, one side of the round shell (804) is provided with a first opening, the other side of the round shell (804) is provided with a second opening, the mounting plate (801) is mounted inside the round shell (804), the mounting plate (801) is tightly attached to one side of the round shell (804) provided with the second opening, a first mounting groove is formed in the round shell (804), a second mounting groove is formed in the mounting plate (801), the first mounting groove corresponds to the second mounting groove, a stabilizing spring (802) is mounted between the first mounting groove and the second mounting groove, and the round shell (804) is mounted on the mounting plate (801) through a buckle;
the optical fiber strain sensor is characterized in that the optical fiber strain sensor (7) is arranged on the fixing plate (803), the stabilizing device (8) is arranged on the surface of the pressure-bearing device, the optical fiber strain sensors (7) are connected with each other through an optical cable (5) to form an optical fiber strain sensor group, and the optical fiber strain sensor group is connected with the demodulating unit (9) through the optical cable (5);
demodulation unit (9) are wired through optic fibre and are connected at monitoring analysis control system platform (10), demodulation unit (9) inside is equipped with wireless transmission device, the inside of monitoring analysis control system platform (10) is equipped with wireless transmission and receives the device, demodulation unit (9) are connected at monitoring analysis control system platform (10) through wireless transmission device and wireless transmission and receive the device.
2. An optical fibre force measurement monitoring system according to claim 1, characterized in that the optical fibre strain sensor (7) is formulated by the formula
Calculating the selected wavelength;
the optical fiber strain sensor (7) sends a strain signal to a demodulation unit (9), and the demodulation unit (9) uses a formula
Obtaining the reflectivity FSli and the optical loss OPne of the sensor, wherein TCS and CTE are standard correction values of the optical fiber strain sensor (7) of the current model, further obtaining the strain quantity of a strain signal, marking the strain quantity as YB, and comparing the strain quantity with a preset value in the optical fiber strain sensor (7), wherein the method comprises the following specific steps:
s1 through the formula
Obtaining a calibrated preset value YSZ, wherein TrefIs the current ambient light wavelength, TGSSCurrent ambient light intensity;
the monitoring analysis control system platform (10) obtains T through the sunlight sensor and the infrared wavelength sensorrefAnd TGSS；
S2, comparing the preset calibrating value YSZ with a preset value;
when the calibrated preset value YSZ exceeds the preset value, the demodulation unit (9) sends an alarm signal to the monitoring analysis control system platform (10);
when the calibrated preset value YSZ does not exceed the preset value, the demodulation unit (9) sends a demodulation signal to the monitoring analysis control system platform (10);
the demodulation signal comprises a calibration preset value YSZ, and the monitoring analysis control system platform (10) passes through a formula
Obtaining a strain force curve graph; where a is the last calibrated preset value.
3. The optical fiber force measurement monitoring system according to claim 1, wherein the lower portion of the upper pressure plate (1) is provided with an inclined surface, a first boss and a second boss, the first boss is in clearance fit with a limit hole groove formed in the center of the lower pressure plate (3), and the second boss is in clearance fit with an inner hole formed in the wedge-shaped ring (2).
4. An optical fiber force measurement monitoring system according to claim 1, wherein the wedge ring (2) is installed in the mounting groove (4), the upper and lower surfaces of the wedge ring (2) are provided with a slide mounting groove, and the circumferential direction of the wedge ring (2) is provided with a mounting platform of the stabilizing device (8).
5. The fiber force measurement monitoring system of claim 1, wherein the diameter of the second opening is smaller than that of the first opening.
6. The optical fiber force measurement monitoring system according to claim 1, wherein the wireless transmission device is a GPRS wireless network card, and the wireless transmission receiving device is a GPRS wireless network card receiver.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010843978.XA CN111855046A (en) | 2020-08-20 | 2020-08-20 | Optical fiber force measurement monitoring system |
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| CN202010843978.XA CN111855046A (en) | 2020-08-20 | 2020-08-20 | Optical fiber force measurement monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754911A (en) * | 2022-04-06 | 2022-07-15 | 曹桂忠 | Coal mine tunnel roof stress detector based on fiber grating sensor |
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2020
- 2020-08-20 CN CN202010843978.XA patent/CN111855046A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754911A (en) * | 2022-04-06 | 2022-07-15 | 曹桂忠 | Coal mine tunnel roof stress detector based on fiber grating sensor |
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