CN214095895U - Building structure object deformation detection device - Google Patents

Abstract

The utility model provides a building structure deformation detection device, including box body and a plurality of sensor, it is a plurality of the sensor distributes in the horizontal and vertical of waiting to detect building structure characteristic sensitive point position, be provided with controller and demonstration charactron in the box body, it is a plurality of the sensor passes through the AD pin of operational amplifier circuit with the controller and is connected, one side of box body is operating panel, last display screen, shift knob and the pilot lamp of being equipped with of operating panel, show charactron and controller electric connection and locate the inboard of display screen, wait to detect the horizontal deflection and the vertical deflection of building structure and show on the display screen. The utility model discloses can measure building structure shape variables such as bridge, house, tunnel, can be used to in the laboratory or open-air, the staff can carry out the precision measurement to building structure shape variables such as bridge, house, tunnel very conveniently, and it is convenient to have the high reading of measurement accuracy, and the result does not need the secondary to calculate.

Description

Building structure object deformation detection device

Technical Field

The utility model relates to a building structure deformation detection area, concretely relates to building structure shape change detection device.

Background

Because the deformation of the building structure is generated by dynamic accumulation and has uncertainty on the time and the deformation amount of the deformation, the traditional monitoring instrument and method are not easy to find, and the current building industry determines the deformation of the building structure such as bridges, houses, tunnels and the like by a professional detection instrument, and the defects and disadvantages are that: the monitoring precision is limited by technical parameters of purchased instruments, the deformation is usually delayed in manual field monitoring, the deformation perception degree is low in real-time monitoring, and the most important problem is that the real-time monitoring cannot be carried out in underground engineering or places with weak satellite signals.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a building structure deformation detection device, the deformation that can acquire building structures such as bridge, house, tunnel of real-time high accuracy, the deformation value shows through the real-time dynamic display of charactron.

For solving the technical problem, the embodiment of the utility model provides a building structure deformation detection device, including box body and a plurality of sensor, it is a plurality of the sensor distributes in the horizontal and vertical of waiting to detect building structure characteristic sensitive point position, be provided with controller and demonstration charactron in the box body, it is a plurality of the sensor passes through the operation amplifier circuit and is connected with the AD pin of controller, one side of box body is operating panel, last display screen, shift knob and the pilot lamp of being equipped with of operating panel, show charactron and controller electric connection and locate the inboard of display screen, wait to detect the horizontal deflection and the vertical deflection display of detecting building structure on the display screen.

The side of the box body is provided with a plurality of wiring terminals, the sensors are connected with the wiring terminals in a one-to-one correspondence mode, and the wiring terminals are correspondingly connected with A/D pins of the controller through the operational amplification circuit.

Wherein, a power supply for supplying power to the operational amplification circuit and the controller is arranged in the box body.

Preferably, the power supply voltage of the power supply is 5V.

Preferably, the sensor is a BX120-50AA resistance strain gauge. The controller selects an STM32F103ZET6 chip of a 32-bit machine.

The sensor is adhered to the building structure to be detected through an adhesive, and the adhesive has electric insulation.

Wherein, be equipped with deformation early warning and transfinite buzzer siren in the box body.

The indicating lamps comprise a reset indicating lamp, a zero clearing indicating lamp, a calibration indicating lamp and a display maintaining indicating lamp.

The utility model discloses an above-mentioned technical scheme's beneficial effect as follows: the utility model discloses can measure building structure shape variable such as bridge, house, tunnel, can be used to in the laboratory or open-air, the staff can carry out the precision measurement to building structure shape variable such as bridge, house, tunnel very conveniently, and it is convenient to have the high reading of measurement accuracy, and the result does not need the secondary to calculate, the utility model discloses collect communication, network sensing, deformation analysis and calculate in an organic whole, can be used to building structure deformation state detection aassessment, be an economic efficient structure health detection system.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the inner side of the box body of the present invention;

fig. 3 is a circuit block diagram of the present invention;

fig. 4 is a flowchart of the present invention.

Description of reference numerals:

1. a box body; 2. a sensor; 4. a controller; 5. displaying the nixie tube; 6. an operation panel; 61. a display screen; 62. a switch button; 63. an indicator light; 7. a wiring terminal; 8. a power source; 9. a buzzer alarm.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, the embodiment of the utility model provides a building structure deformation detection device, including box body 1 and a plurality of sensor 2, it is a plurality of sensor 2 distributes in the horizontal and vertical of waiting to detect building structure characteristic detection point, be provided with controller 4 and demonstration charactron 5 in the box body 1, it is a plurality of sensor 2 is connected with controller 4's AD pin through operational amplifier circuit, one side of box body 1 is operating panel 6, last display screen 61, shift knob 62 and the pilot lamp 63 of being equipped with of operating panel 6, pilot lamp 63 keeps the pilot lamp including reset indicator, zero clearing pilot lamp, calibration pilot lamp and demonstration.

The display nixie tube 5 is electrically connected with the controller 4 and is arranged on the inner side of the display screen 61, and the transverse deformation and the longitudinal deformation of the building structure to be detected are displayed on the display screen 61.

A buzzer alarm 9 is further arranged in the box body 1, and an occurrence opening of the buzzer alarm 9 is arranged on the operation panel 6.

The side of box body 1 is equipped with a plurality of binding post 7, and is a plurality of sensor 2 is connected with a plurality of binding post 7 one-to-one, binding post 7 corresponds with the AD pin of controller 4 through operational amplifier circuit and is connected.

The box body 1 is internally provided with a power supply 8 for supplying power to the operational amplification circuit and the controller 4. The power supply voltage of the power supply 8 is 5V.

The sensor 2 adopts a BX120-50AA resistance strain gauge.

The controller 4 selects an STM32F103ZET6 chip of a 32-bit machine.

The sensor 2 is adhered to the building structure to be detected through an adhesive, and the adhesive is good in electrical insulation and stable in chemical property.

The technical solution of the present invention is described in detail below.

1. Sensor selection for deformation measuring device

The sensor of the measuring device uses a BX120-50AA resistance strain gauge, and can be used for measuring the deformation of building structures such as bridges, houses, tunnels and the like. The sensitive part of the sensor is a cantilever beam structure or a characteristic point (a tunnel top point, a tunnel bottom point, a pair of convergence points at two waists and points at two sides of a crack) on one section of the shield subway tunnel, and the nonlinear error is less than 0.5 percent within the range of +/-1 g of corresponding linear acceleration. The installation mode is gluing, and the use is very convenient. The BX120-50AA strain gauge is an analog sensor and can be directly connected with an analog I/O port of an stm32f103 series single chip microcomputer for use. Parameters of the BX120-50AA strain gage sensor are as follows.

(1) Sensitivity coefficient: 2.0 +/-1%

(2) Working temperature: minus 10 to plus 60 DEG C

(3) Operating Voltage (VDC): + 3- +10V

(4) Resistance value: 120 +/-1 ohm

(5) Base material: constantan.

2. Controller and display device selection and design for deformation measuring device

The controller of the deformation measuring device selects a common 32-bit machine STM32F103ZET6 on the market, and the display part selects a nixie tube to display the transverse and longitudinal structural deformation values. The sensor signal is connected with the A/D pin of the STM32F103ZET6 after being amplified by the operational amplifier circuit. The display nixie tube can effectively overcome the crosstalk when not gating, so that the static characteristic of display is irrelevant to scanning, and the stability of display is greatly improved. The STM32F103 chip used in the design of the measuring device is provided with the FSMC interface, so that the access speed of the measured value is greatly improved, and the real-time property and the memory of the measured value are enhanced.

3. Hardware circuit design and function description of deformation measuring device

The block diagram of the deformation measuring device is shown in fig. 3, and the sensor of the circuit is composed of 14 groups of resistance strain gauges which are required to be respectively arranged in the transverse direction and the longitudinal direction of the structure. Generally, the more the resistive strain gauge is arranged, the closer the deformation value obtained is to the true value. The multi-channel signal amplifying circuit converts the resistance variation of the resistance strain gauge into an amplified voltage signal, and because 14 groups of resistance strain gauges exist, the multi-channel signal amplifying circuit outputs 14 groups of analog signals. These signals directly give the singlechip, the utility model discloses the singlechip that chooses for use is inside from taking 16A/D conversion module of group, therefore the singlechip can directly handle these signals, and need not other A/D conversion module. The utility model discloses a deformation measuring device power supply unit is the 5V power supply, generally use the cell-phone power adapter can, the value of measuring deformation volume is with mm as the unit to the deformation of waiting to detect building structure is shown with the vertical deformation value to horizontal deformation value.

4. Implementation of deformation measurement

When the resistance strain gauge is used for measuring strain, the strain gauge is adhered to a detection point of a building structure to be detected, when the structure deforms, the resistance strain gauge deforms along with the structure, the resistance of the resistance wire in the resistance strain gauge changes due to mechanical deformation of the resistance wire, the deformation condition of the structure is reflected by the change of the resistance, and the basic principle of measuring strain by using the resistance strain gauge is adopted. Strain gage resistance changes are caused by mechanical deformation of the metal,

the utility model discloses a realize the thinking and be exactly at the structure horizontal with the numerous resistance foil gage of longitudinal arrangement, must make the resistance foil gage warp when structure thing detection point takes place to warp a little, structure thing detection point deflection is directly proportional to the foil gage deflection moreover, the result that the foil gage warp can directly lead to the resistance change of resistance. When the transverse stretching (compression) of the detection point of the structure changes, the resistance of the transversely arranged strain gauge can be increased (reduced), and the transverse deformation of the structure is calculated by a certain algorithm according to the increase (reduction) of the resistance. When the longitudinal stretching (compression) of the detection point of the structure changes, the resistance of the longitudinally arranged strain gauge can be increased (reduced), and the longitudinal deformation of the structure is calculated by a certain algorithm according to the increase (reduction) of the resistance.

5. Deformation measuring device sensor mounting

When the resistance strain gauge is arranged on the structure: firstly, the strain gauge and the detected point are required to be deformed together, and secondly, the resistance value of the resistance strain gauge is required to be stable, so that an accurate strain measurement result can be obtained, which is the basic principle of strain gauge pasting. Therefore, the quality of the strain gauge itself and the quality of the adhesion have a great influence on the measurement result, and the strain gauge must be firmly adhered to the detected point of the test piece, so that the technical requirement on the adhesion is very strict. In order to ensure the pasting quality and the measurement accuracy, the following requirements are required:

(1) carefully checking and sorting the resistance strain gauges to ensure the quality of the strain gauges; to be arranged both transversely and longitudinally at the structure measurement points;

(2) the measuring point substrate is flat, clean and dry, so that the strain gauge can be firmly pasted on a test piece, does not fall off or warp, and does not contain bubbles;

(3) the adhesive has good electrical insulation, stable chemical property, good process performance, small creep, high bonding strength and small influence of temperature and humidity, ensures the bonding quality, insulates the strain gauge from a test piece, does not creep, and ensures the stability of the resistance value of the resistance strain gauge;

(4) the direction and position of the sticking must be correct because the deformation is different at different positions and different directions on the test piece.

6. Deformation measurement device software design

The utility model provides a detection device's programming flow chart is shown in FIG. 4.

7. The utility model provides a detection device's exterior view is shown in figure 1.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. The utility model provides a building structure thing becomes detection device, its characterized in that, includes box body and a plurality of sensor, and is a plurality of the sensor distributes in the horizontal and vertical of waiting to detect building structure characteristic sensitive point position, be provided with controller and demonstration charactron in the box body, it is a plurality of the sensor passes through the operation amplifier circuit and is connected with the AD pin of controller, one side of box body is operating panel, operating panel is last to be equipped with display screen, shift knob and pilot lamp, show charactron and controller electric connection and locate the inboard of display screen, wait to detect the horizontal deflection and the vertical deflection of building structure and show on the display screen.

2. The building structure shape change detection device according to claim 1, wherein a plurality of connection terminals are provided on a side of the box body, the plurality of sensors are connected to the plurality of connection terminals in a one-to-one correspondence, and the connection terminals are connected to a/D pins of the controller through an operational amplifier circuit.

3. The building structure shape change detecting apparatus according to claim 1, wherein a power supply for supplying power to the operational amplifier circuit and the controller is provided in the box body.

4. A deformation sensing device for building structures according to claim 3, characterized in that the power supply voltage of said power supply is 5V.

5. The building structure form factor detection device of claim 1, wherein the sensor is a BX120-50AA resistance strain gauge.

6. The building structure form change detecting device of claim 1 or 2, wherein the controller selects a 32 bit machine STM32F103ZET6 chip.

7. A deformation sensing device for building structures according to claim 3, characterized in that said sensor is affixed to the building structure to be sensed by means of an adhesive, said adhesive having electrical insulation properties.

8. The building structure shape change detection device according to claim 1, wherein a deformation warning and overrun buzzer alarm is provided in the box body.

9. The building structure form factor detection device of claim 1, wherein the indicator lights include a reset indicator light, a clear indicator light, a calibration indicator light, and a display hold indicator light.

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