CN111380451A - Wireless strain monitoring system for gate - Google Patents
Wireless strain monitoring system for gate Download PDFInfo
- Publication number
- CN111380451A CN111380451A CN202010405839.9A CN202010405839A CN111380451A CN 111380451 A CN111380451 A CN 111380451A CN 202010405839 A CN202010405839 A CN 202010405839A CN 111380451 A CN111380451 A CN 111380451A
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- Prior art keywords
- strain
- gate
- strain gauge
- circuit
- microcontroller
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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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
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/225—Measuring circuits therefor
- G01L1/2262—Measuring circuits therefor involving simple electrical bridges
Abstract
The invention discloses a gate wireless strain monitoring system. The system comprises: the strain gauge comprises a strain gauge and a signal processing device electrically connected with the strain gauge; the strain gauge is adhered to a preset position of the gate, and a waterproof layer is coated outside the strain gauge and used for monitoring the strain of the preset position of the gate; the signal processing device comprises a waterproof shell, a circuit structure and a power supply module, wherein the circuit structure and the power supply module are arranged in the waterproof shell, the circuit structure comprises a resistor which is used for being connected with the strain gauge into a bridge structure, a signal conditioning circuit, a microcontroller, a power supply control circuit and a wireless communication module, signals output by the bridge are transmitted to the microcontroller after passing through the signal conditioning circuit, a communication port of the microcontroller is electrically connected with the wireless communication module, the power supply control circuit is used for controlling the power supply module to supply power to the wireless communication module when the microcontroller receives the signals output by the signal conditioning circuit, and strain signals received by the microcontroller are transmitted to the remote monitoring equipment. The invention has waterproof performance and can carry out long-time monitoring.
Description
Technical Field
The invention relates to monitoring of a gate in a water conservancy and hydropower junction building, in particular to a wireless strain monitoring system for the gate.
Background
The hydraulic steel gate is one of important metal structure components of a hydraulic and hydroelectric junction building, the operation condition of the hydraulic steel gate directly influences the function exertion and the operation safety of the project, and the operation safety problem of the gate is very important because the case that the whole junction project has accidents caused by improper daily management and maintenance of the gate is rare.
The hydraulic steel gate mainly plays a role in retaining water and discharging flood, static stress generated by the change of a water retaining head, dynamic stress generated in the process of discharging flood and strain conditions generated by other complex loads are very important parameters for safe operation, and when the strain value reaches or exceeds the allowable strain value of the material adopted by the gate, the probability of accidents occurring in the gate is increased rapidly.
The stress-strain measurement by adopting the resistance strain gauge electrical measurement method is a common means for testing, analyzing and evaluating the reliability and safety of engineering structure design, manufacture and assembly, and is widely applied to the engineering fields of aviation, machinery, vehicles, civil engineering and the like.
The strain gage electric measurement method is a stress analysis method for measuring the surface strain of a structure by using a resistance strain gage and determining the surface stress condition of a component according to the strain-stress relation. During measurement, the resistance strain gauge is adhered to the surface of a measured point of the part. When the part generates strain under the action of load, the resistance strain gauge generates corresponding resistance change, and the change is measured by the strain gauge, so that the strain and the stress of the measured point can be calculated.
In the prior art, the detection process of the gate strain measurement device hardly conforms to the actual operation working condition of the gate, the waterproof performance is poor, and the device can only be used for short-time measurement and cannot realize long-term monitoring.
Disclosure of Invention
The invention aims to provide a waterproof monitoring system capable of monitoring the strain of a gate for a long time.
In order to achieve the purpose, the invention provides the following scheme:
a wireless strain monitoring system for a gate, comprising: the strain gauge comprises a strain gauge and a signal processing device electrically connected with the strain gauge;
the strain gauge is adhered to the preset position of the gate, and is coated with a waterproof layer outside and used for monitoring the strain of the preset position of the gate;
the signal processing device comprises a waterproof shell, a circuit structure arranged in the waterproof shell and a power supply module for supplying power to the circuit structure, the circuit structure comprises a resistor, a signal conditioning circuit, a microcontroller, a power supply control circuit and a wireless communication module, wherein the resistor, the signal conditioning circuit, the microcontroller, the power supply control circuit and the wireless communication module are used for being connected with the strain gauge to form a bridge structure, the input end of the signal conditioning circuit is electrically connected with the output end of the bridge structure, the input end of the microcontroller is electrically connected with the output end of the signal conditioning circuit, the communication port of the microcontroller is electrically connected with the wireless communication module, the wireless communication module is used for transmitting the strain signal received by the microcontroller to remote monitoring equipment, the power supply control circuit is used for controlling the power supply module to supply power to the wireless communication module when the microcontroller receives the signal output by the signal conditioning circuit.
Optionally, the wireless communication module is a ZigBee wireless communication module.
Optionally, the output voltage of the power supply module is regulated by an LDO regulator.
Optionally, the preset position is a position where the stress obtained by finite element analysis of the gate structure is greater than a set threshold.
Optionally, the waterproof layer is 707 glue coating.
Optionally, the strain gauge is electrically connected to the signal processing device through a wire, and the wire is connected to the strain gauge and the signal processing device in a waterproof manner.
Optionally, the wire is in waterproof connection with the strain gauge and the signal processing device through aerial insertion.
Optionally, the circuit structure further includes: and the power supply management circuit is used for managing the power supply module to supply power to the electric bridge, the signal conditioning circuit and the microcontroller.
Optionally, the signal conditioning circuit includes a filter circuit, an amplifying circuit, and an analog-to-digital converter.
Optionally, the power module is a battery.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the wireless strain monitoring system for the gate comprises the strain gauge and the signal processing device electrically connected with the strain gauge, wherein the strain gauge is used for monitoring the strain of the preset position of the gate, a waterproof layer is coated outside the strain gauge, and the signal processing device is provided with a waterproof shell, so that the waterproofness of the whole monitoring system is guaranteed. In addition, the monitoring system provided by the invention supplies power to the wireless communication module only when the strain gauge generates the strain signal, wakes up the wireless communication module to transmit the strain signal, and the wireless communication module is in a non-power-on state at the rest of time, so that the power consumption is saved, and the long-term monitoring of the gate is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a wireless strain monitoring system for a gate according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural diagram of a wireless strain monitoring system for a gate according to an embodiment of the present invention, and as shown in fig. 1, the wireless strain monitoring system for a gate according to the embodiment includes: a strain gauge 1 and a signal processing device electrically connected to the strain gauge 1;
the strain gauge 1 is adhered to a preset position of the gate, and is coated with a waterproof layer outside and used for monitoring the strain of the preset position of the gate;
signal processing device, including waterproof shell, circuit structure and the power module of setting in waterproof shell, circuit structure is including being used for connecting into the resistance 2 of bridge configuration with foil gage 1, signal conditioning circuit 3, microcontroller 4, power control circuit 6 and wireless communication module 5, signal conditioning circuit 3's input is connected with the output electricity of bridge configuration, microcontroller 4's input is connected with signal conditioning circuit 3's output electricity, microcontroller 4's communication port is connected with wireless communication module 5 electricity, wireless communication module 5 is used for transmitting the strain signal that microcontroller 4 received to remote monitoring equipment, power control circuit 6 is used for controlling power module to supply power to wireless communication module 5 when microcontroller 4 receives the signal of signal conditioning circuit 3 output.
In this embodiment, the circuit structure is disposed on the circuit board, wherein the resistor 2 in the circuit structure and the strain gauge 1 attached to the preset position of the gate are connected to form a bridge structure, for example, a wheatstone bridge, when the preset position of the gate is stressed, the strain gauge 1 will generate a change in resistance, and the bridge structure converts the change in resistance into a change in bridge voltage. The signal conditioning circuit 3 conditions the voltage signal output by the bridge, for example, filters, amplifies, and converts the voltage signal into a digital signal. When the microcontroller 4 receives the digital signal, the power control circuit 6 controls the power module to supply power to the wireless communication module 5 to wake up the wireless communication module 5, and then the microcontroller 4 sends the digital signal to an external monitoring device, such as a center console, a monitoring center, a monitoring terminal and the like, through the wireless communication module 5, and the external monitoring device can analyze and predict the state of the detected gate by using analysis software. In this embodiment, the outside package of foil gage 1 is equipped with the waterproof layer, and signal processing device is provided with waterproof shell, has ensured the waterproof nature of the wireless monitoring system that meets an emergency of gate. Meanwhile, the wireless communication module 5 is electrified to be awakened to carry out signal transmission only when the resistance value of the strain gauge 1 changes, so that the power consumption of the wireless communication module 5 is reduced, and the long-time monitoring of the gate wireless strain monitoring system is guaranteed.
As an alternative embodiment, the wireless communication module 5 is a ZigBee wireless communication module 5, and when the wireless communication module is not in operation, the wireless communication module automatically enters a sleep state, so that the power consumption of wireless communication is reduced, and the wireless communication module can be awakened by a gateway in the air to realize necessary communication.
As an alternative embodiment, the voltage output by the power supply module is regulated by the LDO regulator. The LDO voltage stabilizer has the characteristics of extremely low power consumption and small volume, and meets the power supply requirement of a system.
In this embodiment, before pasting foil gage 1, carry out finite element calculation analysis to the structure of gate, the stress distribution state of analysis gate under the design load operating mode of gate can be according to actual demand, and the stress strain condition that foil gage 1 was used for monitoring the gate is arranged in stress complicated and great region.
As an alternative embodiment, the water barrier layer is 707 glue coating.
In this embodiment, the strain gauge 1 is electrically connected to the signal processing device through a wire, and the wire is connected to the strain gauge 1 and the signal processing device in a waterproof manner. As an alternative embodiment, the wire can be in waterproof connection with the strain gauge 1 and the signal processing device through aerial insertion, and the waterproof level above IP68 can be achieved.
As an optional implementation manner, the circuit structure in this embodiment further includes: and the power management circuit 7 is used for managing the power module to supply power to the bridge, the signal conditioning circuit 3 and the microcontroller 4.
As an alternative embodiment, the signal conditioning circuit 3 includes a filter circuit, an amplifying circuit, and an analog-to-digital converter. The analog-to-digital converter is a 24-bit ADC, collects an electric signal and converts the strain into a digital signal.
As an alternative embodiment, the power module is a battery.
In this embodiment, the bridge is automatically switched, using analog switches with low supply and low on-resistance, to achieve full, half and quarter bridge switching. The signal conditioning circuit 3 adopts low-noise, rail-to-rail and other instrument operational amplifiers, and configures amplification factors and signal bandwidth. The microcontroller 4 and the wireless communication module 5 are communicated through a serial port. The lead for connecting the strain gauge 1 with the signal processing device is as short as possible, the signal processing device is welded on the gate by adopting a metal back plate during installation, screw holes are reserved in the back plate, and the device is connected with the metal back plate by adopting anti-falling screws.
The measurement of the gate wireless strain monitoring system provided by the embodiment has the following characteristics:
1. high sensitivity and high precision, and the resolution reaches 1 microstrain. When the gate is subjected to pressure or impact force, the surface generates micro deformation, which is not beneficial to observation. The strain gauge can convert the micro deformation into an electric signal, the high-precision 24-bit ADC is used for collecting the electric signal, the strain is converted into a digital signal, and the digital signal is wirelessly transmitted to a data center.
2. The method has wide application range and is suitable for measuring various deformation generating parts.
3. The size of the resistance strain gauge is small, and the minimum grid length of the strain gauge is 0.2 mm; the strain gauge has the advantages of light weight, convenience in installation, no additional force on the member, no influence on the stress state of the member, and capability of being used for measuring the strain with large stress gradient change.
4. The frequency response is good. Dynamic strain can be measured from static strain to tens of kilohertz.
5. The output is an electric signal in the measuring process, and the digitization, the automation and the radio remote measurement are easy to realize.
6. The device can be used for measurement in the environments of high and low temperature, high-speed rotation, strong magnetic field and the like.
7. The battery is powered and the design of low power consumption can realize long-term operation.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A wireless strain monitoring system for a gate, comprising: the strain gauge comprises a strain gauge and a signal processing device electrically connected with the strain gauge;
the strain gauge is adhered to the preset position of the gate, and is coated with a waterproof layer outside and used for monitoring the strain of the preset position of the gate;
the signal processing device comprises a waterproof shell, a circuit structure arranged in the waterproof shell and a power supply module for supplying power to the circuit structure, the circuit structure comprises a resistor, a signal conditioning circuit, a microcontroller, a power supply control circuit and a wireless communication module, wherein the resistor, the signal conditioning circuit, the microcontroller, the power supply control circuit and the wireless communication module are used for being connected with the strain gauge to form a bridge structure, the input end of the signal conditioning circuit is electrically connected with the output end of the bridge structure, the input end of the microcontroller is electrically connected with the output end of the signal conditioning circuit, the communication port of the microcontroller is electrically connected with the wireless communication module, the wireless communication module is used for transmitting the strain signal received by the microcontroller to remote monitoring equipment, the power supply control circuit is used for controlling the power supply module to supply power to the wireless communication module when the microcontroller receives the signal output by the signal conditioning circuit.
2. The gate wireless strain monitoring system of claim 1, wherein the wireless communication module is a ZigBee wireless communication module.
3. The system of claim 1, wherein the LDO regulator is used to regulate the output voltage of the power module.
4. The wireless strain monitoring system for the gate according to claim 1, wherein the preset position is a position where the stress obtained by finite element analysis of the gate structure is greater than a set threshold.
5. The wireless strain monitoring system of claim 1, wherein the water barrier is a 707 glue coating.
6. The wireless strain monitoring system of claim 1, wherein the strain gauge is electrically connected with the signal processing device through a wire, and the wire is connected with the strain gauge and the signal processing device in a waterproof manner.
7. The wireless strain monitoring system of claim 6, wherein the wire is in waterproof connection with the strain gauge and the signal processing device through aerial insertion.
8. The gate wireless strain monitoring system of claim 1, wherein the circuit structure further comprises: and the power supply management circuit is used for managing the power supply module to supply power to the electric bridge, the signal conditioning circuit and the microcontroller.
9. The wireless strain monitoring system of claim 1, wherein the signal conditioning circuit comprises a filter circuit, an amplifier circuit, and an analog-to-digital converter.
10. The wireless strain monitoring system of claim 1, wherein the power module is a battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010405839.9A CN111380451A (en) | 2020-05-14 | 2020-05-14 | Wireless strain monitoring system for gate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010405839.9A CN111380451A (en) | 2020-05-14 | 2020-05-14 | Wireless strain monitoring system for gate |
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| Publication Number | Publication Date |
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| CN111380451A true CN111380451A (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010405839.9A Pending CN111380451A (en) | 2020-05-14 | 2020-05-14 | Wireless strain monitoring system for gate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114441943A (en) * | 2022-01-28 | 2022-05-06 | 苏州浪潮智能科技有限公司 | Strain detection method and device, computer equipment and storage medium |
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2020
- 2020-05-14 CN CN202010405839.9A patent/CN111380451A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114441943A (en) * | 2022-01-28 | 2022-05-06 | 苏州浪潮智能科技有限公司 | Strain detection method and device, computer equipment and storage medium |
| CN114441943B (en) * | 2022-01-28 | 2024-01-30 | 苏州浪潮智能科技有限公司 | Strain detection method, strain detection device, computer equipment and storage medium |
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