Reservoir affected zone house settlement monitoring system

Abstract

The utility model provides a reservoir influence area house settlement monitoring system, which comprises a tilt angle sensor buried beside a house, a signal processor and a piezoelectric sensor, the signal processor and the piezoelectric sensor are fixed on a house wall body, the top of the signal processor is provided with an inclined support, and the inclined support is provided with a laser displacement sensor; the signal processor is respectively connected with a piezoelectric sensor, a laser displacement sensor, a tilt angle sensor and a communicator through wires, and is connected with a power supply of a house through a wire; the communicator is in communication connection with a user monitoring end and is connected with a warning indicator through a wire. According to the system, the piezoelectric sensor is directly fixed on the surface of a house, and non-contact measurement is performed by combining the laser displacement sensor, so that the construction amount is greatly reduced, and high cost of optical fiber embedding is avoided; the inclination angle sensor reduces the damage requirement for the existing structure, multiple types of sensors work cooperatively, displacement, inclination and vibration data are analyzed in an integrated mode through the signal processor, environment interference is compensated, and the monitoring precision is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the geological disaster monitoring technical field, specifically belongs to a reservoir influence area house settlement monitoring system. BACKGROUND

[0002] After the reservoir is impounded, the water level in the reservoir area rises, causing changes in groundwater level and changes in the mechanical properties of rock-soil mass, often leading to uneven settlement of the foundation of surrounding houses, and further inducing wall cracking and even collapse.

[0003] The traditional monitoring method mainly relies on periodic manual measurement by a total station or embedding optical fiber sensors. Manual measurement is performed by manually holding a measuring instrument on site to measure the foundation of the house. During the measurement process, the collapse of the wall can easily cause harm to the measurement personnel, resulting in a high risk of injury to the measurement personnel. Furthermore, in the reservoir influence area, multiple optical fiber sensors are often embedded by drilling holes in the building structure. The settlement information of the house foundation is collected through multiple optical fiber sensors. However, during the embedding process, multiple holes need to be drilled, which can cause significant damage to existing houses, resulting in high embedding costs. Moreover, the embedding process weakens the strength of the house, leading to wall cracking and even collapse. In addition, a single optical fiber sensor is easily disturbed by the environment, resulting in a high false alarm rate. SUMMARY

[0004] To solve the problem of high embedding cost and high false alarm rate of existing optical fiber sensors in the process of measuring existing houses, the utility model provides a reservoir influence area house settlement monitoring system.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a reservoir influence area house settlement monitoring system, which comprises an inclination sensor embedded beside the house and a signal processor and a piezoelectric sensor fixed on the wall of the house. The top of the signal processor is provided with an inclined bracket, and a laser displacement sensor is installed on the inclined bracket.

[0007] The signal processor is connected with the piezoelectric sensor, the laser displacement sensor, the inclination sensor and the communicator through wires. The signal processor is connected with the power supply of the house through wires.

[0008] The communicator is connected with a user monitoring end. The communicator is connected with an alarm through wires.

[0009] Preferably, the signal processor is connected with a filter through wires. The filter is connected with the inclination sensor and the signal conditioning collector through wires.

[0010] Preferably, the filter is a second-order active low-pass filter, comprising a resistor R1, a capacitor C1, a resistor R2 and an operational amplifier U1.

[0011] The resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 and the capacitor C1 on the same side is electrically connected with the signal output end of the tilt sensor, and the other end of the resistor R1 and the capacitor C1 on the same side is electrically connected with the inverting input end of the operational amplifier U1.

[0012] One end of the resistor R2 is electrically connected with the output end of the operational amplifier U1, and the other end of the resistor R2 is electrically connected with the inverting input end of the operational amplifier U1.

[0013] The output end of the operational amplifier U1 is connected with the analog signal input end of the signal conditioning collector through a wire, and is used for outputting a filtered tilt signal.

[0014] The output end of the operational amplifier U1 is electrically connected with the analog signal input end of the signal conditioning collector.

[0015] Preferably, the resistance value of the resistor R1 and the resistor R2 ranges from 10kΩ to 47kΩ, and the tolerance ranges from -1% to +1%.

[0016] The capacitance of the capacitor C1 is 0.68µF, the tolerance is -5% to +5%, the withstand voltage is 50V, and the medium is X7R.

[0017] Preferably, the warning device comprises a buzzer and a warning lamp, the buzzer and the warning lamp are installed on the communicator, and the buzzer and the warning lamp are connected with the communicator through wires respectively.

[0018] Preferably, the pulse frequency of the buzzer is 2kHz, and the duty cycle is 50%.

[0019] Preferably, the sensitivity of the piezoelectric sensor is 0.5pC / N.

[0020] Preferably, the range of the laser displacement sensor ranges from 0.1m to 50m, and the spot diameter is 3mm.

[0021] Preferably, the tilt support comprises a base plate, the base plate is installed on the top of the signal processor, two pivot lug seats are symmetrically arranged on the base plate, a pivot sleeve is rotatably installed between the two pivot lug seats, an adjusting plate is connected with the pivot sleeve, the adjusting plate is hinged with the pivot lug seat, and the laser displacement sensor is installed on the adjusting plate.

[0022] Compared with the prior art, the utility model has the following beneficial technical effects:

[0023] The utility model provides a kind of house settlement monitoring system of reservoir influence area, and the system is directly attached to the surface of house foundation by piezoelectric sensor, combined with laser displacement sensor non-contact measurement, greatly reduce construction quantity and avoid the high cost of fiber embedding;Further reduce the damage demand to existing structure by the external layout of tilt sensor, multiple sensors work cooperatively, through signal processor integrated analysis displacement, tilt and vibration data, compensate environmental interference, significantly improve monitoring precision, and signal processor and communicator are using guide rail buckle transverse plug-in structure, whole assembly can be completed without drilling in field, no residual damage on wall surface after disassembly, significantly reduce the cost and construction period of existing building reconstruction.

[0024] Further, the system captures micro-strain triggered laser displacement high-frequency scanning by piezoelectric sensor, and carries out parameter checking in combination with buried tilt sensor, and reduces false alarm rate in wind vibration, vehicle impact and other environmental noise background through signal conditioner, so that the settlement amount comprehensive error is less than ±0.5mm, and the settlement detection accuracy is improved.

[0025] Further, the buzzer in the alarm of the system cooperates with warning light, when the settlement rate is greater than 2mm / h or the displacement accumulation is greater than 5mm in 24h, the buzzer in the alarm generates 2kHz sound frequency for early warning, at the same time, cooperate with warning light to prompt on-site danger in two levels of yellow / red, and the alarm information is pushed to user monitoring end or flood prevention platform in real time through communicator, to realize remote visual management of dangerous house risk in reservoir area. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is one of the installation schematic diagram of the house settlement monitoring system of reservoir influence area proposed by the utility model;

[0027] Figure 2 It is the second installation schematic diagram of the house settlement monitoring system of reservoir influence area proposed by the utility model;

[0028] In the drawings: 1, house; 2, piezoelectric sensor; 3, laser displacement sensor; 4, signal processor; 5, communicator; 6, buzzer; 7, warning light; 8, filter; 9, tilt sensor; 10, power plug; 11, energy storage battery; 12, signal conditioning collector. DETAILED DESCRIPTION

[0029] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the utility model. Therefore, the drawings and the description are considered to be essentially exemplary rather than limiting.

[0030] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model by indicating or implying that the indicated device or element must have a particular orientation, construction and operation.

[0031] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0032] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected, or can be communicated; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0035] The utility model provides a kind of reservoir influence area house settlement monitoring system, such as Figure 1 And Figure 2As shown, the signal processor 4 fixed on the wall of the house 1, the piezoelectric sensor 2, the laser displacement sensor 3, the inclination sensor 9 buried beside the house 1; the signal processor 4 is connected with the piezoelectric sensor 2, the laser displacement sensor 3, the inclination sensor 9 and the communicator 5 through wires respectively; the signal processor 4 is connected with the power supply of the house 1 through wires; the communicator 5 is connected with the user monitoring end in communication. The system captures the foundation anomaly through the piezoelectric sensor, verifies the absolute displacement through the automatic triggering of the laser displacement sensor, processes the obtained signals through the signal processor 4, eliminates the high-frequency interference such as vehicle vibration, wind and rain impact, and when the settlement is detected, the alarm is given through the alarm and sent to the user monitoring end through the communicator.

[0036] As shown in Figure 1 and Figure 2 , the piezoelectric sensor 2 is provided with a plurality of piezoelectric sensors 2, each of which is connected with the signal processor 4 through wires, and the wires are connected with the signal processor 4 using M12x1.5 waterproof joints, the back of the plurality of piezoelectric sensors 2 is provided with magnetic attraction pieces, and the magnetic attraction pieces are adsorbed on the galvanized steel plate, the magnetic attraction force of the magnetic attraction piece in the embodiment is not less than 8N / cm 2 ; one side end of the galvanized steel plate is fixed on the side wall of the signal processor 4, one end surface of the galvanized steel plate is fixed on the wall of the house, and the wall of the house is provided with an installation groove through concrete to fix the galvanized steel plate; in the embodiment, the piezoelectric sensor 2 is a piezoelectric ceramic sheet, which converts mechanical stress into charge signal, the model of the piezoelectric ceramic sheet is Kistler9215A, and the sensitivity is 0.5pC / N. When the reservoir surrounding house foundation is deformed due to water level change, the piezoelectric sensor 2 installed at the four corners and the root of the load-bearing wall is extruded or stretched, the piezoelectric sensor 2 converts mechanical stress into charge signal, and when the piezoelectric sensor 2 is subjected to 10N pressure due to slight subsidence of the foundation, 5pC charge signal is generated.

[0037] As shown in Figure 1 and Figure 2As shown, the laser displacement sensor 3 is installed on the tilt bracket with a tilt angle adjustment range of-15°~+15°, the tilt bracket is installed on the top of the signal processor 4, the model of the laser displacement sensor 3 is HL-G108, the range is 0.1 m ~50m, the spot diameter is 3mm, and the laser displacement sensor 3 is used to accurately measure the absolute displacement of the house relative to the distant reference point, and the accuracy is-0.1mm~+0.1mm. In the embodiment, the model of the laser displacement sensor 3 is HL-G108, the range is 0.1 m ~50m, and the spot diameter is 3mm. The tilt bracket includes a base plate, a pivot ear seat, a pivot sleeve, an adjustment plate, an angle scale piece, a pointer, a locking mechanism, and a friction damping washer. The four corners of the base plate are provided with installation holes with a diameter of φ4.5mm, hexagonal bolts are installed in the installation holes, the base plate is connected with the top cover of the signal processor 4 through M4 stainless steel internal hexagonal bolts, and a support reference surface is formed. Two pivot ear seats are welded at the center position of the upper end surface of the base plate, the two pivot ear seats are symmetrically arranged, opposite end surfaces of the two pivot ear seats are symmetrically provided with through holes with a diameter of φ6mm, the two through holes are coaxially arranged, and a pivot sleeve is jointly installed in the two through holes. The two ends of the pivot sleeve are pressed into an oil bronze sleeve to realize lubrication-free and low-friction rotation. The two sides of the pivot sleeve are limited by stainless steel open retainer rings to ensure that there is no axial movement. The edge of the adjustment plate is milled into an arc-shaped long groove with a groove width of 5mm and a groove arc radius of 22mm. Fixed holes with a diameter of φ4.5mm are drilled on the two sides of the adjustment plate, and the fixed holes are used to install the positioning bracket on the laser displacement sensor 3. The adjustment plate is penetrated through the pivot sleeve by M5 galvanized steel bolts and is hinged with the pivot ear seat, so that the adjustment plate can be rotated around the pivot. An angle scale piece is attached to one side of the adjustment plate, the scale range of the angle scale piece is-15°~+15°, and the resolution of the angle scale piece is 1°. A pointer is riveted to the position of the base plate relative to the angle scale piece, the pointer is a red anodized pointer, and is used for rapid reading. A locking bolt is movably installed in the arc-shaped long groove, the model of the locking bolt is M5x20, an arc-shaped limiting plate is welded below the base plate, the lower end of the locking bolt penetrates through the arc-shaped limiting plate, and the locking bolt includes an elastic washer, a flat washer and a butterfly hand nut, can be manually pressed at any angle, and the locking torque is about 3N·m. The elastic washer provides a pre-tightening force to prevent loosening caused by long-term vibration. A diameter of 20mm aramid fiber composite pad is arranged between the contact surface of the adjustment plate and the pivot ear seat, which can provide stable damping after the locking bolt is loosened, and avoid the laser displacement sensor 3 from falling due to sudden force loss.

[0038] The tilt sensor 9 is buried in the ground of the house 1 and is used for detecting the tilt angle of the house foundation. The model of the tilt sensor 9 is SCC2130, which is packaged in an epoxy resin protective shell and buried to a depth of 350mm. The tilt sensor 9 is connected to the signal conditioning collector 12 through a signal line, the signal line is sleeved with a corrugated pipe with a diameter of 12mm, the corrugated pipe is made of PVC, and the copper wire braided layer in the corrugated pipe is grounded.

[0039] As shown in Figure 1 and Figure 2 The signal processor 4 includes a storage battery 11 and a signal conditioning collector 12, which are integrated in an aluminum alloy shell with a size of 200*150*80mm and a wall thickness of 2.0mm. The storage battery 11 is connected with a power plug 10 through a wire, and the power plug 10 is used to connect the power supply of the house 1. The signal conditioning collector 12 is connected with the piezoelectric sensor 2, the laser displacement sensor 3, the tilt sensor 9 and the communicator 5 through wires respectively. An RS-485 interface is arranged on the aluminum alloy shell and connected with the communicator 5.

[0040] The signal processor 4 is connected with a filter 8 through a wire, and the filter 8 is connected with the tilt sensor 9 and the signal conditioning collector 12 through wires respectively. The filter 8 is a second-order active low-pass filter, which includes a resistance R1, a capacitance C1, an operational amplifier U1, a resistance R2 and the operational amplifier U1. The resistance R1 is connected with the capacitance C1 in parallel. One end of the resistance R1 and the capacitance C1 on the same side is electrically connected with the signal output end of the tilt sensor 9, and the other end of the resistance R1 and the capacitance C1 on the same side is electrically connected with the inverting input end of the operational amplifier U1. One end of the resistance R2 is electrically connected with the output end of the operational amplifier U1, and the other end of the resistance R2 is electrically connected with the inverting input end of the operational amplifier U1, which together with the parallel resistance R1 and the capacitance C1 forms a feedback circuit. The output end of the operational amplifier U1 is electrically connected with the analog signal input end of the signal conditioning collector 12. The resistance R1 and the resistance R2 have a resistance range of 10kΩ-47kΩ and a tolerance range of-1%~+1%. In this embodiment, the resistance of the resistance R1 and the resistance R2 is preferably 10kΩ, and the capacitance of the capacitance C1 is 0.68µF. The operational amplifier U1 is of ADA4898-1 type. The capacitance of the capacitance C1 is 0.68µF, the tolerance range is-5%~+5%, the withstand voltage is 50V, and the medium is X7R. The operational amplifier U1 is of ADA4898-1 type.

[0041] The system determines the amplification factor through the capacitor C1, amplifies the charge signal to a voltage signal of 0~5V through the operational amplifier U1, eliminates high-frequency interference such as vehicle passing, wind and rain impact through the filter 8, and only retains the low-frequency effective signal related to the foundation settlement, so that the noise signal of vehicle vibration is attenuated to less than 5% of the original value, and the accuracy of subsequent analysis is ensured. In the signal conditioning collector 12, if the voltage of the filtered piezoelectric signal suddenly changes by more than 200mV, it is determined to be an abnormal state, the laser displacement sensor 3 is triggered from 1Hz to 10Hz high-frequency sampling mode, and the inclination angle of the inclination sensor 9 buried underground is read synchronously, to exclude the single-sided settlement misjudgment, that is, if the piezoelectric sensor 2 detects that a certain angle of the foundation rapidly subsides, and the laser sensor 3 shows that the displacement amount at this position reaches 3mm / h, and the inclination sensor 9 detects that the inclination angle of the house in the same direction is 0.3°, it is determined to be real settlement. The signal conditioning collector 12 sets a weighting coefficient for the data of multiple sensors, and obtains the settlement amount through the Kalman filtering algorithm stored therein, wherein the weighting coefficient set for the piezoelectric signal of the piezoelectric sensor 2 is 0.7, and the weighting coefficient set for the laser displacement sensor 3 is 0.3. The communicator 5 is transversely inserted into the heat dissipation groove below the top of the aluminum alloy shell through the guide rail buckle.

[0042] As shown in Figure 1 and Figure 2 , the warning device includes a buzzer 6 and a warning light 7, the buzzer 6 and the warning light 7 are installed on the communicator 5, and the buzzer 6 and the warning light 7 are connected with the communicator 5 through wires respectively. In the embodiment, the pulse frequency of the buzzer 6 is 2kHz, and the duty cycle is 50%; the warning light 7 is an RGB three-color LED lamp, wherein in the RGB three-color LED lamp, the red light corresponds to a settlement rate greater than 5mm / d, the yellow light corresponds to a rate of 2~5mm / d, and the green light is in standby state. For example, if it is determined to be real settlement, the warning device carries out multi-level early warning based on the settlement amount, that is, if the settlement rate accumulated in 24h of the settlement amount is 2~5mm / d, the buzzer rings at a frequency of 2kHz, and the yellow light in the RGB three-color LED lamp is always on, reminding the on-site personnel to preliminarily investigate and carry out first-level alarm; if the settlement rate accumulated in 24h of the settlement amount is greater than 5mm / d, the communicator 5 sends a warning information to the user monitoring end, the warning information content includes time, position and settlement amount, the red light in the RGB three-color LED lamp is always on, and second-level alarm is carried out.

[0043] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0044] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand. The above is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application, and any modification made on the basis of the technical solutions according to the technical idea of the present application falls within the protection scope of the claims of the present application.

Claims

1. A system for monitoring house settlement in a reservoir-affected area, characterized in that, It includes an inclination sensor (9) buried next to the house and a signal processor (4) and a piezoelectric sensor (2) fixed on the wall of the house (1). The top of the signal processor (4) is equipped with an inclination bracket, on which a laser displacement sensor (3) is installed. The signal processor (4) is connected to the piezoelectric sensor (2), laser displacement sensor (3), tilt sensor (9) and communicator (5) respectively via wires. The signal processor (4) is connected to the power supply of the house (1) via wires. The communicator (5) is connected to a user monitoring terminal, and the communicator (5) is connected to an alarm device via a wire.

2. The system for monitoring house settlement in a reservoir-affected area according to claim 1, characterized in that, The signal processor (4) includes an energy storage battery (11) and a signal conditioning acquisition unit (12), which are integrated in an aluminum alloy housing. The energy storage battery (11) is connected to the power supply of the house (1) via a wire, and the signal conditioning acquisition device (12) is connected to the piezoelectric sensor (2), the laser displacement sensor (3), the tilt sensor (9) and the communicator (5) via wires respectively.

3. The system for monitoring house settlement in a reservoir-affected area according to claim 2, characterized in that, The signal processor (4) is connected to a filter (8) via wires, and the filter (8) is connected to the tilt sensor (9) and the signal conditioning acquisition unit (12) via wires respectively.

4. A housing settlement monitoring system for a reservoir-affected area according to claim 3, characterized in that, The filter (8) is a second-order active low-pass filter, including resistor R1, capacitor C1, resistor R2 and operational amplifier U1; The resistor R1 is connected in parallel with the capacitor C1. One end of the resistor R1 and the capacitor C1 located on the same side is electrically connected to the signal output terminal of the tilt sensor (9). The other end of the resistor R1 and the capacitor C1 located on the same side is electrically connected to the inverting input terminal of the operational amplifier U1. One end of the resistor R2 is electrically connected to the output terminal of the operational amplifier U1, and the other end of the resistor R2 is electrically connected to the inverting input terminal of the operational amplifier U1. The output terminal of the operational amplifier U1 is electrically connected to the analog signal input terminal of the signal conditioning and acquisition unit (12).

5. A housing settlement monitoring system for a reservoir-affected area according to claim 4, characterized in that, The resistance values ​​of resistors R1 and R2 range from 10kΩ to 47kΩ, with a tolerance range of -1% to +1%. The capacitor C1 has a capacitance of 0.68µF, a tolerance range of -5% to +5%, a withstand voltage of 50V, and a dielectric material of X7R.

6. A housing settlement monitoring system for a reservoir-affected area according to claim 1, characterized in that, The warning device includes a buzzer (6) and a warning light (7), which are mounted on the communicator (5) and connected to the communicator (5) via wires.

7. A housing settlement monitoring system for a reservoir-affected area according to claim 6, characterized in that, The buzzer (6) has a pulse frequency of 2kHz and a duty cycle of 50%.

8. A housing settlement monitoring system for a reservoir-affected area according to claim 1, characterized in that, The sensitivity of the piezoelectric sensor (2) is 0.5 pC / N.

9. A housing settlement monitoring system for a reservoir-affected area according to claim 1, characterized in that, The laser displacement sensor (3) has a range of 0.1m to 50m and a spot diameter of 3mm.

10. A housing settlement monitoring system for a reservoir-affected area according to claim 1, characterized in that, The tilting bracket includes a base plate, which is mounted on the top of the signal processor (4). Two pivot lugs are symmetrically arranged on the base plate. A pivot sleeve is rotatably installed between the two pivot lugs. An adjustment plate is connected to the pivot sleeve, and the adjustment plate is hinged to the pivot lugs. The laser displacement sensor (3) is mounted on the adjustment plate.

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