CN221945421U - Foundation pit supporting axial force monitoring device based on strain induction - Google Patents
Foundation pit supporting axial force monitoring device based on strain induction Download PDFInfo
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- CN221945421U CN221945421U CN202323567828.9U CN202323567828U CN221945421U CN 221945421 U CN221945421 U CN 221945421U CN 202323567828 U CN202323567828 U CN 202323567828U CN 221945421 U CN221945421 U CN 221945421U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 19
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- 238000000034 method Methods 0.000 claims abstract description 7
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- 238000004080 punching Methods 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 5
- 206010063385 Intellectualisation Diseases 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
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- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
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Abstract
The utility model discloses a foundation pit supporting axial force monitoring device based on strain induction, and relates to the technical field of engineering measurement. The device comprises: the method comprises the steps of stamping a metal plate, two groups of full-bridge strain gauges, an intelligent acquisition circuit board, a protective shell and fastening screws; the punching forming metal plate is provided with a threading hole and an assembling hole; the front and back sides of the stamping forming metal plate are respectively bonded with a group of full-bridge strain gauges, wherein the non-bonded ends of one full-bridge strain gauge are welded to two corresponding groups of welding points on the intelligent acquisition circuit board through the threading holes by using lead wires; the fastening screw is used for fixing the protective shell on the stamping forming metal plate through the assembly hole. The utility model can solve the problems that the traditional vibrating wire sensor is greatly influenced by temperature, difficult to compensate temperature, difficult to collect data, and tired vibrating wire can be caused by excessive collection times, and the like, and realize self-adaption, self-calibration, self-compensation and intellectualization of the sensor.
Description
Technical Field
The utility model relates to the technical field of engineering measurement, in particular to a foundation pit supporting axial force monitoring device based on strain induction.
Background
The axial force meter is an indispensable measuring tool for guaranteeing construction safety in the engineering construction process, and the traditional vibrating wire sensor for foundation pit support monitoring has the problems that the sensor is greatly influenced by temperature, temperature compensation is difficult, data acquisition is difficult, vibrating wire fatigue can be caused due to excessive acquisition times, and the like.
Disclosure of utility model
The utility model aims to provide a foundation pit supporting shaft force monitoring device based on strain induction, which can realize self-adaption, self-calibration, self-compensation and intellectualization of a sensor.
In order to achieve the above object, the present utility model provides the following solutions:
Foundation pit supporting axial force monitoring device based on strain induction, comprising: the method comprises the steps of stamping a metal plate, two groups of full-bridge strain gauges, an intelligent acquisition circuit board, a protective shell and fastening screws;
The punching forming metal plate is provided with a threading hole and an assembling hole; the front and back sides of the stamping forming metal plate are respectively bonded with a group of full-bridge strain gauges, wherein the non-bonded ends of one full-bridge strain gauge are welded to two corresponding groups of welding points on the intelligent acquisition circuit board through the threading holes by using lead wires; the fastening screw is used for fixing the protective shell on the stamping forming metal plate through the assembly hole.
Optionally, the intelligent acquisition circuit board specifically includes: the device comprises a band-pass filter, an instrument operational amplifier, a differential analog-to-digital converter, an STM32 microprocessor, a chip built-in flash memory module and a communication module which are connected in sequence.
Optionally, the protective housing specifically includes: a first half-shell and a second half-shell;
The first half shell is provided with a through hole corresponding to the assembly hole, and the fastening screw simultaneously penetrates through the through hole and the assembly hole to fixedly connect the first half shell, the stamping forming metal plate and the second half shell.
Optionally, the punch forming metal plate is further provided with a main connecting hole for connecting with a main structure of the foundation pit support to be tested.
Optionally, the threading hole, the assembly hole and the main connecting hole are sequentially arranged on the stamping forming metal plate from inside to outside.
Optionally, the number of the threading holes, the assembly holes and the main connecting holes is two.
According to the specific embodiment provided by the utility model, the utility model discloses the following technical effects:
The utility model discloses a foundation pit supporting axial force monitoring device based on strain induction, which comprises a stamping forming metal plate, two groups of full-bridge strain gages, an intelligent acquisition circuit board, a protective shell and fastening screws, wherein the stamping forming metal plate is arranged on the foundation pit supporting axial force monitoring device; the punching forming metal plate is provided with a threading hole and an assembling hole; the front and back sides of the stamping forming metal plate are respectively bonded with a group of full-bridge strain gauges, wherein the non-bonded ends of one full-bridge strain gauge are welded to two corresponding groups of welding points on the intelligent acquisition circuit board through the threading holes by using lead wires; the fastening screw is used for fixing the protective shell on the stamping forming metal plate through the assembly hole. The utility model can solve the problems that the traditional vibrating wire sensor is greatly influenced by temperature, difficult to compensate temperature, difficult to collect data, and tired vibrating wire can be caused by excessive collection times, and the like, and realize self-adaption, self-calibration, self-compensation and intellectualization of the sensor.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a foundation pit support axial force monitoring device based on strain sensing.
Reference numerals: 1. stamping and forming a metal plate; 2. full-bridge strain gage; 3. an intelligent acquisition circuit board; 4. a protective housing; 5. fastening a screw; 101. a main connection hole; 102. an assembly hole; 103. and a threading hole.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a foundation pit supporting shaft force monitoring device based on strain induction, which can realize self-adaption, self-calibration, self-compensation and intellectualization of a sensor.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the present utility model provides a foundation pit supporting axial force monitoring device based on strain induction, which comprises: the intelligent collecting circuit board comprises a stamping forming metal plate 1, two groups of full-bridge strain gages 2, an intelligent collecting circuit board 3, a protective shell 4 and fastening screws 5.
Specifically, the punch-formed metal plate 1 is provided with a threading hole 103 and an assembly hole 102; the front and back sides of the stamping forming metal plate 1 are respectively bonded with a group of full-bridge strain gauges 2, wherein the non-bonded ends of one side of the full-bridge strain gauges 2 are welded to two corresponding groups of welding points on the intelligent acquisition circuit board 3 through the threading holes 103 by using leads; the fastening screw 5 fixes the protective case 4 to the press-formed metal plate 1 through the assembly hole 102.
As a specific embodiment, the intelligent acquisition circuit board 3 specifically includes: the device comprises a band-pass filter, an instrument operational amplifier, a differential analog-to-digital converter, an STM32 microprocessor, a chip built-in flash memory module and a communication module which are connected in sequence.
As a specific embodiment, the protective case 4 specifically includes: a first half-shell and a second half-shell; through holes corresponding to the positions of the assembly holes 102 are formed in the first half shell, and the fastening screws 5 penetrate through the through holes and the assembly holes 102 at the same time to fixedly connect the first half shell, the stamping forming metal plate 1 and the second half shell.
As a specific embodiment, the punch-formed metal plate 1 is further provided with a main connecting hole 101 for connecting with a main structure of a foundation pit support to be tested. The threading holes 103, the assembly holes 102 and the main connecting holes 101 are sequentially formed in the punch-formed metal plate 1 from inside to outside. The number of the threading holes 103, the assembly holes 102 and the main connecting holes 101 is two.
Based on the above embodiments, the following examples are provided.
Vibration wire sensor based on be arranged in traditional scheme foundation ditch support monitoring has the problems that the influence of temperature is big, temperature compensation is difficult, data acquisition is difficult, vibration wire fatigue can be produced to the excessive number of times of gathering, etc., uses the foil gage as physical quantity acquisition equipment in this embodiment, mainly including riveting and the stamping forming metal sheet 1 that awaits measuring the structure and be used for drawing and bearing the sensor, two sets of full bridge foil gage 2, intelligent acquisition circuit board 3 and protective housing 4 to use as the sensor. The use method of the axial force monitoring device comprises the steps of binding or welding an assembled sensor assembly on a steel bar or a supporting structure to be detected, connecting a signal cable extending out of the sensor to a collector, or transmitting a signal to a field acquisition device through a wireless antenna, wherein the axial force monitoring device is simple in structure, convenient to install, accurate and visual in measurement result, not easy to be influenced by temperature change, and has the advantages of small temperature drift, automation in temperature compensation, simplicity in data acquisition, long continuous acquisition life, low acquisition energy consumption and the like. Monitoring data is provided for the stability of the support system of the enclosure, if the support system is suddenly stressed in the process of excavation of the foundation pit, the support system can be immediately found, and timely remedial measures can be taken.
In the above structure, the full-bridge strain gauge 2 is adhered to both sides of the metal plate by glue, the protective housing 4 is used for protecting the strain gauge and the circuit board, and the fastening screw 5 fixes the protective housing 4 and the intelligent acquisition circuit board 3. The two groups of full-bridge strain gauges 2 respectively positioned on the front side and the back side are adhered to the metal plate and then welded to the two groups of welding points corresponding to the intelligent acquisition plate through lead wires, and finally the two protective housing 4 assemblies and the circuit board assembly are fixed by fastening screws 5. The metal plate is made of stainless steel metal through die stamping (or laser cutting), the full-bridge strain gauge 2 is made of metal through etching, and the intelligent acquisition circuit board 3 is made of a hard brush circuit board, a chip and components through assembling and processing. The protective housing 4 is manufactured by a plastic injection molding process.
The intelligent acquisition circuit board 3 integrates the functions of sensor output small-voltage analog quantity acquisition, analog signal digital signal conversion, physical quantity statistics, physical quantity conversion, wireless signal transmission and the like. The protective shell 4 is formed by an engineering plastic shell and a rubber sealing ring, so that the sensor is waterproof and compression-resistant as a whole. The stamping forming metal plate 1 is formed by processing stainless steel blank, wherein two main connecting holes 101 are used for connecting a main structure to be tested and an assembled sensor device assembly, two assembly holes 102 are used for penetrating assembly screws to ensure the integrity of the sensor assembly, and two threading holes 103 are used for sensor threading.
Wherein, intelligent acquisition circuit board 3 includes: the intelligent acquisition circuit board 3 is provided with a band-pass filter for separating analog quantity small signals, a high-precision instrument operational amplifier for amplifying the analog quantity small signals, a differential analog-digital converter for high-precision analog-digital conversion, an STM32 microprocessor for realizing physical quantity conversion, a chip built-in flash memory module for on-site storage and a 433MHZ wireless communication module with a wireless forwarding function.
The working process is as follows: after the signal is collected, the burr signal is eliminated through a band-pass filter, the original signal quality is optimized, the small signal is amplified through a high-precision instrument operational amplifier, an analog-digital converter is used for converting analog quantity into digital quantity, the digital quantity is subjected to physical quantity conversion through an STM32 microprocessor and is stored in a flash memory module arranged in a chip, and finally the physical quantity data is transmitted to a platform through a 433Mhz communication module.
The scheme of the embodiment has the following beneficial effects:
The sensor adopts the strain gauge as a physical quantity transmitter, the temperature drift problem of the sensor is greatly reduced due to the electrical characteristics of the full-bridge strain gauge, the reading of the sensor is ensured not to be influenced by temperature change, the strain quantity change of the metal structural plate caused by thermal expansion and contraction is measured and read by the high-precision temperature sensor on the intelligent acquisition plate and transmitted in parallel through wireless signals, and the reading error of the reading caused by environmental change is reduced. Meanwhile, the design of the wireless sensor saves the installation time, and the digital sensor does not need a reader and reduces the field use cost.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the core concept of the utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (6)
1. Foundation pit supporting axial force monitoring device based on strain induction, characterized by comprising: the method comprises the steps of stamping a metal plate, two groups of full-bridge strain gauges, an intelligent acquisition circuit board, a protective shell and fastening screws;
The punching forming metal plate is provided with a threading hole and an assembling hole; the front and back sides of the stamping forming metal plate are respectively bonded with a group of full-bridge strain gauges, wherein the non-bonded ends of one full-bridge strain gauge are welded to two corresponding groups of welding points on the intelligent acquisition circuit board through the threading holes by using lead wires; the fastening screw is used for fixing the protective shell on the stamping forming metal plate through the assembly hole.
2. The foundation pit supporting axial force monitoring device based on strain induction of claim 1, wherein the intelligent acquisition circuit board specifically comprises: the device comprises a band-pass filter, an instrument operational amplifier, a differential analog-to-digital converter, an STM32 microprocessor, a chip built-in flash memory module and a communication module which are connected in sequence.
3. The foundation pit supporting axial force monitoring device based on strain induction according to claim 1, wherein the protective housing specifically comprises: a first half-shell and a second half-shell;
The first half shell is provided with a through hole corresponding to the assembly hole, and the fastening screw simultaneously penetrates through the through hole and the assembly hole to fixedly connect the first half shell, the stamping forming metal plate and the second half shell.
4. The foundation pit supporting axial force monitoring device based on strain induction of claim 1, wherein the punch forming metal plate is further provided with a main connecting hole for connecting a foundation pit supporting main structure to be tested.
5. The foundation pit supporting shaft force monitoring device based on strain induction of claim 4, wherein the threading holes, the assembly holes and the main connecting holes are sequentially formed in the stamping forming metal plate from inside to outside.
6. The foundation pit supporting axial force monitoring device based on strain induction of claim 4, wherein the number of threading holes, the number of assembly holes and the number of main connecting holes are two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323567828.9U CN221945421U (en) | 2023-12-26 | 2023-12-26 | Foundation pit supporting axial force monitoring device based on strain induction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323567828.9U CN221945421U (en) | 2023-12-26 | 2023-12-26 | Foundation pit supporting axial force monitoring device based on strain induction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221945421U true CN221945421U (en) | 2024-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323567828.9U Active CN221945421U (en) | 2023-12-26 | 2023-12-26 | Foundation pit supporting axial force monitoring device based on strain induction |
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| Country | Link |
|---|---|
| CN (1) | CN221945421U (en) |
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2023
- 2023-12-26 CN CN202323567828.9U patent/CN221945421U/en active Active
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