CN214173607U - Stress monitoring system based on strain sensor - Google Patents
Stress monitoring system based on strain sensor Download PDFInfo
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- CN214173607U CN214173607U CN202120261851.7U CN202120261851U CN214173607U CN 214173607 U CN214173607 U CN 214173607U CN 202120261851 U CN202120261851 U CN 202120261851U CN 214173607 U CN214173607 U CN 214173607U
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Abstract
The utility model discloses a stress monitoring system based on strain gauge sensors, which comprises a strain gauge sensor, a signal amplifier, a digital signal collector, a virtual serial port concentrator, a central processing unit, a display and a server terminal which are connected in sequence; the strain sensor is arranged on the surface of the measured object; the strain sensor is used for converting the stress deformation of a structure of a measured object into an analog quantity electric signal, the digital signal collector is used for converting the analog quantity electric signal into a digital signal, and the digital signal is transmitted to the central processing unit in a serial mode through the virtual serial port concentrator so that the server terminal can monitor the stress of the measured object according to the digital signal. The utility model discloses can carry out real-time detection to the spatial grid structure of each link under the condition that does not have any artificial intervention to in time export display/server terminal with detecting data analysis result and demonstrate.
Description
Technical Field
The utility model belongs to the technical field of the construction, especially, relate to a stress monitoring system based on strain sensor.
Background
The steel frame structure is a landmark building of a cement factory, such as a pre-heater tower frame and a steel pipe support of a feed inlet of a clinker warehouse, and the large-span steel frame structure is a spatial structure system which is reasonable in stress, light in weight, high in rigidity and simple in rod piece. When the net rack is installed on site, the net rack is influenced by environment, temperature, installation process and the like, so that additional stress is generated in the splicing process of the net rack, the actual stress of local rod pieces is greatly different from the standard, and even the safe use of the net rack is endangered.
The grid structure field detection technology ensures the quality and safety of a large-span grid structure, is widely applied to the construction and use stages of grid factory construction at present, and is applied to the reinforcement, detection and identification of the grid structure. In order to adapt to development and ensure the safety of the grid structure, grid safety detection is more and more widely applied to engineering.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a stress monitoring system based on strain transducer, can carry out real-time detection to the spatial grid structure of each link under the condition that does not have any artificial intervention to in time export display/server terminal with detecting data analysis result and show.
In order to solve the technical problem, the utility model discloses a technical scheme be: a stress monitoring system based on a strain sensor comprises the strain sensor, a signal amplifier, a digital signal collector, a virtual serial port concentrator, a central processing unit, a display and a server terminal which are connected in sequence;
the strain sensor is arranged on the surface of the measured object;
the strain sensor is used for converting the stress deformation of the structure of the object to be measured into an analog quantity electric signal, the digital signal collector is used for converting the analog quantity electric signal into a digital signal and serially transmitting the digital signal to the central processing unit through the virtual serial port concentrator, so that the server terminal can monitor the stress size of the object to be measured according to the digital signal;
the strain gauge sensors are arranged in 2-8 numbers, and the strain gauge sensors are evenly distributed on the surface of the measured object in the 2-8 numbers. The 2-8 strain sensors are arranged in parallel and then are electrically connected with the signal amplifier in series.
The utility model discloses a solve the further technical scheme that its technical problem adopted and be:
further, the strain gauge sensor is fixed to the object to be measured in the following manner: and (5) bonding fitting or anchor rod drilling fixing.
Further, the strain gauge sensors are 8, and 8 strain gauge sensors are uniformly distributed on the surface of the measured object.
Furthermore, the virtual serial port concentrator is provided with 8 ports, and the 8 ports are transmitted to the central processing unit through RS-232 serial communication.
Furthermore, the central processing unit is electrically connected with the server terminal through RJ-45, and the central processing unit is electrically connected with the display through RS-232.
Further, the strain gauge sensor is a BGK-4000 strain gauge sensor.
Further, the signal amplifier is an MCP606 signal amplifier.
Further, the digital signal collector is an ADS1232 digital signal collector.
Further, the virtual serial hub is a VS10X virtual serial hub.
Further, the central processing unit is an ARM S3C6410 central processing unit.
Further, the server terminal is a computer or a tablet computer.
The beneficial effects of the utility model are that following several points have at least:
1. under the condition of no manual intervention, the device can not only carry out real-time stress detection on large buildings such as houses and bridges with various structures, but also carry out real-time detection on various medium and large construction instruments, such as a detected object structure, and timely output a detection data analysis result to a display/server terminal for displaying, so that the efficiency of stress detection is greatly improved, the cost of management and maintenance is reduced, and unqualified buildings or over-stressed buildings and construction instruments can be timely remedied and treated, the safety of construction workers is guaranteed to a greater extent, and the accident that the buildings and the construction instruments collapse due to over-stress is avoided;
2. the device can realize long-term detection and early warning prompt on the building and construction equipment, thereby realizing safety detection and health assessment on the building and construction equipment.
Drawings
Fig. 1 is a schematic diagram of the circuit principle structure of the present invention;
the parts in the drawings are marked as follows:
strain gauge sensor 1, signal amplifier 2, digital signal collector 3, virtual serial port concentrator 4, central processing unit 5, display 6 and server terminal 7.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Example (b): a stress monitoring system based on a strain gauge sensor is shown in figure 1 and comprises a strain gauge sensor 1, a signal amplifier 2, a digital signal collector 3, a virtual serial port concentrator 4, a central processing unit 5, a display 6 and a server terminal 7 which are sequentially connected;
the strain sensor is arranged on the surface of the measured object;
the strain sensor is used for converting the stress deformation of the structure of the object to be measured into an analog quantity electric signal, the digital signal collector is used for converting the analog quantity electric signal into a digital signal and serially transmitting the digital signal to the central processing unit through the virtual serial port concentrator, so that the server terminal can monitor the stress size of the object to be measured according to the digital signal;
the strain gauge sensors are arranged in 2-8 numbers, and the strain gauge sensors are evenly distributed on the surface of the measured object in the 2-8 numbers. The 2-8 strain sensors are arranged in parallel and then are electrically connected with the signal amplifier in series.
The mode that strain gauge sensor and measured object are fixed does: and (5) bonding fitting or anchor rod drilling fixing.
The virtual serial port concentrator is provided with 8 ports, and the 8 ports are transmitted to the central processing unit through RS-232 serial communication.
The central processing unit is electrically connected with the server terminal through RJ-45, and the central processing unit is electrically connected with the display through RS-232.
The strain sensor is a BGK-4000 strain sensor.
The signal amplifier is an MCP606 signal amplifier.
The digital signal collector is an ADS1232 digital signal collector.
The virtual serial port hub is a VS10X virtual serial port hub.
The central processing unit is an ARM S3C6410 central processing unit.
The server terminal is a computer or a tablet computer.
The object to be measured includes at least one of a building and a construction equipment.
During operation, the BGK-4000 strain type sensor transmits the generated micro strain data to an MCP606 signal amplifier for amplification, the amplifier can communicate with 8 sensor terminals at most, the number of monitored points is further increased, the micro strain data are converted into digital signals through an ADS1232 digital signal collector, the digital signals pass through a VS10X virtual serial port concentrator, the concentrator can virtualize 8 ports at most, equipment cost can be saved, the digital signals are transmitted to an ARM S3C6410 processor through RS-232 serial communication, the stress condition of each measuring point can be calculated through processing and analyzing the data, whether buildings and construction equipment are safe and reliable can be deduced, the result is output to a display for display, and the data are transmitted to a PC (personal computer) end through RJ-45 for big data analysis. The utility model relates to a compare with other similar equipment, greatly improved the data sampling frequency of system to the monitoring point and higher data processing ability, data processing speed and data precision promote about respectively 21% and 16%.
The whole detection process needs to perform persistent storage on detection data to a local disk of a central server, and the storage information comprises: detection time, detection place, detection part number, strain value, set standard value and judgment result.
The BGK-4000 sensor signal conversion strain value calculation method comprises the following steps: ε ═ G × C × (R-R)0). Wherein G is the standard coefficient of the instrument, and G is 3.70 mu epsilon/Digit (Digit is f)2×10-3F is the strain gauge frequency); c is a calibration coefficient, and the equipment C of the part is 1.038971; r is the current reading (there are two ways of current reading, one is direct reading frequency, one is reading modulus, the former is 1/1000 of the latter); r0Is the initial reading (measured at the time the equipment is installed). The strain force conversion relation is as follows: sigma ═ epsilon/E. E is the elastic modulus of the material, here the value is 210 GPa.
In the implementation, 2 test points are selected for testing, the test point 1 is subjected to a pressure test, and the test point 2 is subjected to a tension test. The data collected by real-time measurements revealed that, at the initial stage, the maximum pressure at point 1 was-43, which is 37.75% of the theoretical strain value, and the maximum tension at point 2 was 79, which is 34.21% of the theoretical strain value. Two months later, the pressure maximum value of the measuring point 1 is-174 which is 78.21 percent of the theoretical strain value, and the tension maximum value of the measuring point 2 is 105 which is 23.56 percent of the theoretical strain value. The implementation result shows that the stress values of the two measuring points are greatly jittered in the initial stage and then enter a relative stable period, and the stress of the two measuring points is within a controllable range.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the same principle as the present invention.
Claims (10)
1. The utility model provides a stress monitoring system based on strain sensor which characterized in that: the strain type strain gauge comprises a strain type sensor (1), a signal amplifier (2), a digital signal collector (3), a virtual serial port concentrator (4), a central processing unit (5), a display (6) and a server terminal (7) which are connected in sequence;
the strain sensor is arranged on the surface of the measured object;
the strain sensor is used for converting the stress deformation of the structure of the object to be measured into an analog quantity electric signal, the digital signal collector is used for converting the analog quantity electric signal into a digital signal and serially transmitting the digital signal to the central processing unit through the virtual serial port concentrator, so that the server terminal can monitor the stress size of the object to be measured according to the digital signal;
2-8 strain sensors are arranged and uniformly distributed on the surface of the measured object; the 2-8 strain sensors are arranged in parallel and then are electrically connected with the signal amplifier in series.
2. The strain gage sensor-based stress monitoring system according to claim 1, wherein: the mode that strain gauge sensor and measured object are fixed does: and (5) bonding fitting or anchor rod drilling fixing.
3. The strain gage sensor-based stress monitoring system according to claim 1, wherein: the virtual serial port concentrator is provided with 2-8 ports, and the 2-8 ports are transmitted to the central processing unit through RS-232 serial communication.
4. The strain gage sensor-based stress monitoring system according to claim 1, wherein: the central processing unit is electrically connected with the server terminal through RJ-45, and the central processing unit is electrically connected with the display through RS-232.
5. The strain gage sensor-based stress monitoring system according to claim 1, wherein: the strain sensor is a BGK-4000 strain sensor.
6. The strain gage sensor-based stress monitoring system according to claim 1, wherein: the signal amplifier is an MCP606 signal amplifier.
7. The strain gage sensor-based stress monitoring system according to claim 1, wherein: the digital signal collector is an ADS1232 digital signal collector.
8. The strain gage sensor-based stress monitoring system according to claim 1, wherein: the virtual serial port hub is a VS10X virtual serial port hub.
9. The strain gage sensor-based stress monitoring system according to claim 1, wherein: the central processing unit is an ARM S3C6410 central processing unit.
10. The strain gage sensor-based stress monitoring system according to claim 1, wherein: the server terminal is a computer or a tablet computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120261851.7U CN214173607U (en) | 2021-01-29 | 2021-01-29 | Stress monitoring system based on strain sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120261851.7U CN214173607U (en) | 2021-01-29 | 2021-01-29 | Stress monitoring system based on strain sensor |
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| Publication Number | Publication Date |
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| CN214173607U true CN214173607U (en) | 2021-09-10 |
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| CN202120261851.7U Active CN214173607U (en) | 2021-01-29 | 2021-01-29 | Stress monitoring system based on strain sensor |
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- 2021-01-29 CN CN202120261851.7U patent/CN214173607U/en active Active
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