CN219551437U - Automatic monitoring device for horizontal displacement of foundation pit support structure - Google Patents
Automatic monitoring device for horizontal displacement of foundation pit support structure Download PDFInfo
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- CN219551437U CN219551437U CN202320587845.XU CN202320587845U CN219551437U CN 219551437 U CN219551437 U CN 219551437U CN 202320587845 U CN202320587845 U CN 202320587845U CN 219551437 U CN219551437 U CN 219551437U
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Abstract
The utility model discloses an automatic monitoring device for horizontal displacement of a foundation pit support structure, which comprises an infrared receiver, an infrared transmitter and an oblique angle graduated scale, wherein the infrared receiver and the infrared transmitter are respectively arranged at two ends of the central line of a crown beam, and a red light wire harness emitted by the infrared transmitter and the central line of the crown beam are positioned on the same vertical plane; the oblique angle scale is arranged on the crown beam, the oblique angle scale is perpendicular to the central line of the crown beam, the distance between the red light wire harness emitted by the infrared transmitter and the central line of the crown beam is recorded as H, the largest horizontal deformation size of the foundation pit support structure is recorded as L, the inclination angle of the oblique angle scale is recorded as theta, then H=tan theta is recorded as L, and the infrared receiver and the infrared transmitter are coupled with an infrared sensing circuit for detecting whether the horizontal displacement of the foundation pit support structure reaches a specified maximum value. The method has the effects of monitoring the horizontal deformation state of the foundation pit support structure in real time and improving the efficiency of foundation pit monitoring.
Description
Technical Field
The utility model relates to the technical field of foundation pit engineering, in particular to an automatic monitoring device for horizontal displacement of a foundation pit support structure.
Background
And measuring coordinates of observation points of the foundation pit support structure once or twice a day by using a total station for monitoring the horizontal displacement of the foundation pit support structure, calculating the total horizontal displacement of the observation points, and then spreading the total horizontal displacement to each day to obtain the daily displacement.
However, the total station is troublesome to measure every day, the workload is large, a group of professional measuring staff is required to monitor the foundation pit enclosure structure every day, and the requirements on the professional technical level of the professional measuring staff are also high; when the displacement of the building envelope exceeds the standard alarm value, the situation that the foundation pit building envelope exceeds the standard allowable value is reflected to the upper department and the construction unit, the alarm value is reached, the construction unit needs to take measures, the safety of the building envelope is ensured, the prediction has hysteresis, and the deformation of the foundation pit structure cannot be monitored timely.
Disclosure of Invention
The utility model provides an automatic monitoring device for horizontal displacement of a foundation pit support structure, which aims to monitor the horizontal deformation state of the foundation pit support structure in real time and improve the monitoring efficiency of the foundation pit.
The utility model provides an automatic monitoring device for horizontal displacement of a foundation pit support structure, which adopts the following technical scheme:
the automatic monitoring device for the horizontal displacement of the foundation pit support structure comprises an infrared receiver, an infrared transmitter and an oblique angle graduated scale, wherein the infrared receiver and the infrared transmitter are respectively arranged at two ends of a central line of a crown beam at the top of the foundation pit support structure, and a red light wire harness emitted by the infrared transmitter and the central line of the crown beam are positioned on the same vertical plane; the oblique angle graduated scale is arranged on the crown beam, the oblique angle graduated scale is perpendicular to the central line of the crown beam, the tip end part of the oblique angle graduated scale is attached to the central line of the crown beam and points to one side of the foundation pit, the distance between the red light wire harness emitted by the infrared emitter and the central line of the crown beam is marked as H, the largest horizontal deformation size of the foundation pit enclosure is marked as L, and the inclination angle of the oblique angle graduated scale is marked as theta, so that H=tan theta is marked as L; the infrared receiver and the infrared transmitter are coupled with an infrared sensing circuit for detecting whether the horizontal displacement of the foundation pit support structure reaches a specified maximum value; the infrared induction circuit includes:
the infrared sensing module is used for sensing whether the horizontal displacement of the foundation pit support structure reaches a specified maximum value and sending out an infrared sensing signal; the signal comparison module is coupled with the infrared sensing module and is provided with a threshold signal VREF to output a comparison signal when the infrared sensing signal is smaller than the threshold signal VREF; the prompting module is coupled to the signal comparison module, receives the comparison signal to prompt that the infrared induction circuit has sensed that the horizontal displacement of the foundation pit support structure reaches a specified maximum value at the moment, and sends out a prompting signal.
By adopting the technical scheme, when the foundation pit support structure is built, firstly, a central line of the whole crown beam is drawn above the crown beam at the top of the foundation pit support structure which is already constructed; respectively installing an infrared receiver and an infrared emitter at two ends of the central line of the crown beam, adjusting the position of the infrared emitter according to the red light wire harness emitted by the infrared emitter, enabling the red light wire harness to be overlapped with the central line of the crown beam up and down, keeping the emitted red light wire harness and the central line of the crown beam on the same vertical plane, installing an oblique angle graduated scale on the crown beam, enabling the oblique angle graduated scale to be perpendicular to the central line of the crown beam, and enabling the tip end part of the oblique angle graduated scale to be attached to the central line of the crown beam and point to one side of a foundation pit; according to the requirements of a design drawing, the maximum horizontal deformation dimension L of the foundation pit support structure is obtained, the distance between the infrared wire harness and the central line of the crown beam is adjusted to H, and the foundation pit support structure can be monitored after installation and debugging are completed.
When the infrared receiver and the infrared transmitter are connected in an infrared mode, the infrared sensing module senses whether the horizontal displacement of the foundation pit support structure reaches a specified maximum value in real time and sends out an infrared sensing signal, the foundation pit support structure is continuously built, when the horizontal displacement of the foundation pit support structure reaches the specified maximum value, the infrared sensing signal output by the infrared sensing module is smaller than a threshold value signal VREF, the signal comparison module outputs a comparison signal, the prompt module receives the comparison signal and then sends out a prompt signal, and the prompt module is controlled to send out the prompt signal so as to prompt workers that the horizontal displacement of the foundation pit support structure is detected to reach the specified maximum value at the moment by the infrared sensing circuit, and prompt the workers and construction equipment in the foundation pit to withdraw in time; therefore, the monitoring efficiency is greatly improved, 24-hour monitoring throughout the day is realized, the technology is not influenced by weather and climate, and the technology can be widely applied to projects with foundation pits in civil engineering.
Preferably, the bevel angle scale is arranged at the center position of the central line of the crown beam.
By adopting the technical scheme, as the central position of the central line of the crown beam is the maximum value which can be reached by the horizontal displacement of the foundation pit support structure, the bevel angle graduated scale is arranged at the position, so that the maximum horizontal deformation dimension L of the foundation pit support structure is more convenient to measure.
Preferably, the inclination angle θ of the bevel scale ranges from 0 ° to 90 °, where θ is not equal to 0 and θ is not equal to 90 °.
Through adopting above-mentioned technical scheme, set up the oblique angle scale at different inclination angles, can adapt to the requirement that the horizontal displacement maximum value of different foundation ditch building envelope set up, be convenient for according to the design drawing requirement, select suitable oblique angle scale, apply to in the building of foundation ditch building envelope, improved the accuracy of foundation ditch monitoring.
Preferably, the infrared sensing module includes an infrared transmitting tube VD1 and an infrared receiving tube VD2, the infrared transmitting tube VD1 is disposed at an infrared transmitter, the infrared receiving tube VD2 is disposed at an infrared receiver, an anode of the infrared transmitting tube VD1 is coupled to a power supply voltage VCC through a first resistor R1, and a cathode of the infrared transmitting tube VD1 is grounded; the anode of the infrared receiving tube VD2 is grounded, the cathode of the infrared receiving tube VD2 is coupled to the power supply voltage VCC through the second resistor R2, meanwhile, the cathode of the infrared receiving tube VD2 is coupled to the signal comparison module, the infrared transmitting tube VD1 is connected in parallel with the first capacitor C1, and the infrared receiving tube VD2 is connected in parallel with the second capacitor C2; the infrared transmitting tube VD1 is connected with the infrared receiving tube VD2 through infrared signals.
Through adopting above-mentioned technical scheme, infrared ray that infrared transmitting tube VD1 sent is received by infrared receiving tube VD2, the infrared induction signal that signal comparison module received is greater than threshold value signal VREF this moment, the suggestion module is non-conductive, continue to build foundation ditch building envelope, when foundation ditch building envelope horizontal displacement volume reaches prescribed maximum value, infrared ray is blocked by oblique angle scale part this moment, the infrared induction signal of infrared induction module output is less than threshold value signal VREF, signal comparison module output comparison signal, the suggestion module switches on, infrared transmitting tube VD1 and infrared receiving tube VD 2's signal induction function has been realized.
Preferably, the infrared transmitting tube VD1 and the infrared receiving tube VD2 are respectively and fixedly installed at two ends of a crown beam central line at the top of the foundation pit support structure.
Through adopting above-mentioned technical scheme, infrared transmitting tube VD1 and infrared receiving tube VD2 fixed mounting respectively are at the both ends of foundation ditch building enclosure top's crown beam central line, and the convenience carries out infrared signal connection to foundation ditch building enclosure both ends, and when foundation ditch building enclosure horizontal displacement volume reached prescribed maximum value, infrared ray was blocked by oblique angle scale part, the opening and close of the control prompt module of being convenient for.
Preferably, the signal comparison module includes a comparator N1, a first signal input end of the comparator N1 is coupled to the cathode of the infrared receiving tube VD2, a second signal input end of the comparator N1 is coupled to the threshold signal VREF, and a signal output end of the comparator N1 is coupled to the prompt module.
Through adopting above-mentioned technical scheme, comparator N1 compares the infrared induction signal first time that first signal input received with the threshold value signal VREF of second signal input to the size of infrared induction signal and threshold value signal VREF comparison is fed back to the first time, realizes the function of infrared induction signal size comparison.
Preferably, the prompting module comprises an audible and visual alarm and a triode Q1, a base electrode series resistor R3 of the triode Q1 is coupled to the signal comparison module, an emitter of the triode Q1 and the audible and visual alarm are coupled to a power supply voltage VCC after being connected in series, and a collector of the triode Q1 is grounded.
By adopting the technical scheme, when the triode Q1 is electrified, the triode Q1 is conducted, and the audible and visual alarm is immediately conducted; when the triode Q1 is powered off, the audible and visual alarm is powered off immediately; the oblique angle scale can shield infrared rays and send out prompt signals to remind the staff that the horizontal displacement of the foundation pit support structure reaches a specified maximum value.
Preferably, the audible and visual alarm is fixed at one end of the center line of the crown beam at the top of the foundation pit support structure and is close to one side of the infrared receiver.
Through adopting above-mentioned technical scheme, with audible and visual alarm setting in one side near infrared receiver, be convenient for be connected audible and visual alarm and infrared receiver electricity, infrared receiver sends infrared signal according to the intensity of received infrared ray, and then the start and stop of the audible and visual alarm of control.
In summary, the present utility model includes at least one of the following beneficial technical effects:
1. the infrared receiver, the infrared transmitter and the bevel angle graduated scale are arranged, so that the monitoring efficiency is greatly improved, the 24-hour monitoring throughout the day is realized, the technology is not influenced by weather and climate, and can be widely applied to projects with foundation pits in civil engineering;
2. the oblique angle graduated scale with different oblique angles is arranged, can meet the requirements of the horizontal displacement maximum value setting of different foundation pit enclosing structures, is convenient to select a proper oblique angle graduated scale according to the requirements of design drawings, is applied to the construction of the foundation pit enclosing structures, and improves the accuracy of foundation pit monitoring.
Drawings
Fig. 1 is a schematic structural diagram of an automatic monitoring device for horizontal displacement of a foundation pit support structure according to embodiment 1 of the present utility model;
FIG. 2 is a schematic view of the center line of the crown beam, the red beam and the bevel angle scale of embodiment 1 of the present utility model in an initial state;
FIG. 3 is a schematic view of the center line of the crown beam, the red beam and the bevel angle scale in the maximum horizontal deformation state of the foundation pit support structure in embodiment 1 of the present utility model; the red beam is shown blocked by the bevel scale.
Fig. 4 is a schematic diagram of an infrared sensing circuit in embodiment 2 of the present utility model.
Reference numerals illustrate:
1. a crown beam; 11. a center line; 2. an infrared receiver; 3. an infrared emitter; 31. a red light beam; 4. bevel angle graduated scale; 41. a ruler tip portion; 5. an infrared sensing circuit; 51. an infrared sensing module; 52. a signal comparison module; 53. a prompting module; 531. an audible and visual alarm.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-4.
The embodiment 1 of the utility model discloses an automatic monitoring device for horizontal displacement of a foundation pit support structure.
Referring to fig. 1 and 2, an automatic monitoring device for horizontal displacement of a foundation pit support structure comprises an infrared receiver 2, an infrared transmitter 3 and an oblique angle scale 4, wherein the infrared receiver 2 and the infrared transmitter 3 are respectively arranged at two ends of a central line 11 of a crown beam 1 at the top of the foundation pit support structure, and a red light wire harness 31 emitted by the infrared transmitter 3 and the central line 11 of the crown beam 1 are positioned on the same vertical plane; the oblique angle scale 4 is installed on the crown beam 1, the oblique angle scale 4 is perpendicular to the central line 11 of the crown beam 1, the scale tip 41 of the oblique angle scale 4 is attached to the central line 11 of the crown beam 1 and points to one side of the foundation pit, the distance between the red light wire harness 31 emitted by the infrared emitter 3 and the central line 11 of the crown beam 1 is denoted as H, the largest horizontal deformation size of the foundation pit support structure is denoted as L, the inclination angle of the oblique angle scale 4 is denoted as θ, and h=tan θ×l.
The automatic monitoring device for the horizontal displacement of the foundation pit support structure further comprises an audible and visual alarm 531, wherein the audible and visual alarm 531 is electrically connected with the infrared receiver 2; the audible and visual alarm 531 is fixed at one end of the central line 11 of the crown beam 1 at the top of the foundation pit support structure and is close to one side of the infrared receiver 2; the audible and visual annunciator 531 is convenient to be electrically connected with the infrared receiver 2, and the infrared receiver 2 emits an infrared signal according to the intensity of the received infrared rays, so that the audible and visual annunciator 531 is convenient to be controlled to be opened and closed.
The bevel angle scale 4 is arranged at the center of the center line 11 of the crown beam 1. Because the central position of the central line 11 of the crown beam 1 is the maximum value which can be reached by the horizontal displacement of the foundation pit support structure, the bevel angle scale 4 is arranged at the position, so that the maximum horizontal deformation dimension L of the foundation pit support structure is conveniently measured.
The inclination angle theta of the bevel scale 4 ranges from 0 to 90 degrees, wherein theta is not equal to 0 and theta is not equal to 90 degrees. The bevel angle scale 4 with different inclination angles is arranged, so that the requirements of horizontal displacement maximum value setting of different foundation pit support structures can be met, the proper bevel angle scale 4 is conveniently selected according to the requirements of design drawings, the foundation pit support structures are built, and the accuracy of foundation pit monitoring is improved.
The embodiment 1 of the utility model discloses an automatic monitoring device for horizontal displacement of a foundation pit support structure, which comprises the following implementation principles:
when the foundation pit support structure is built, firstly, a central line 11 of the whole crown beam 1 is drawn above the crown beam 1 at the top of the foundation pit support structure which is already constructed; the method comprises the steps of respectively installing an infrared receiver 2 and an infrared emitter 3 at two ends of a central line 11 of a crown beam 1, adjusting the position of the infrared emitter 3 according to a red light wire harness 31 emitted by the infrared emitter 3, enabling the red light wire harness 31 to be overlapped with the central line 11 of the crown beam 1 up and down, keeping the emitted red light wire harness 31 and the central line 11 of the crown beam 1 on the same vertical plane, installing an oblique angle graduated scale 4 on the crown beam 1, enabling the oblique angle graduated scale 4 to be perpendicular to the central line 11 of the crown beam 1, and enabling a ruler tip 41 of the oblique angle graduated scale 4 to be attached to the central line 11 of the crown beam 1 and point to one side of a foundation pit; according to the requirements of a design drawing, the maximum horizontal deformation dimension L of the foundation pit support structure is obtained, the distance between the infrared wire harness and the central line 11 of the crown beam 1 is adjusted to H, and the foundation pit support structure can be monitored after installation and debugging are completed.
Referring to fig. 3, a red light wire harness 31 emitted from the infrared emitter 3 is received by the infrared receiver 2, the foundation pit enclosure is continuously built, when the horizontal displacement of the foundation pit enclosure reaches a specified maximum value, the bevel scale 4 is blocked by the bevel scale 4, the infrared receiver 2 controls the audible and visual alarm 531, and the audible and visual alarm 531 automatically gives an alarm to remind operators and construction equipment in the foundation pit of timely evacuation.
The embodiment 2 of the utility model discloses an automatic monitoring device for horizontal displacement of a foundation pit support structure.
Referring to fig. 4, under the basis of embodiment 1, an automatic monitoring device for horizontal displacement of a foundation pit support structure is coupled with an infrared sensing circuit 5 for detecting whether the horizontal displacement of the foundation pit support structure reaches a specified maximum value; the infrared induction circuit 5 includes:
the infrared sensing module 51 is used for sensing whether the horizontal displacement of the foundation pit support structure reaches a specified maximum value and sending out an infrared sensing signal.
The infrared sensing module 51 comprises an infrared transmitting tube VD1 and an infrared receiving tube VD2, the infrared transmitting tube VD1 is arranged on the infrared transmitter, the infrared receiving tube VD2 is arranged on the infrared receiver, the anode of the infrared transmitting tube VD1 is coupled to a power supply voltage VCC after passing through a first resistor R1, and the cathode of the infrared transmitting tube VD1 is grounded; the anode of the infrared receiving tube VD2 is grounded, the cathode of the infrared receiving tube VD2 is coupled to the power supply voltage VCC through a second resistor R2, meanwhile, the cathode of the infrared receiving tube VD2 is coupled to the signal comparison module 52, the infrared transmitting tube VD1 is connected with a first capacitor C1 in parallel, and the infrared receiving tube VD2 is connected with a second capacitor C2 in parallel; infrared transmitting tube VD1 is connected with infrared receiving tube VD2 infrared signal.
The infrared transmitting tube VD1 and the infrared receiving tube VD2 are respectively and fixedly arranged at two ends of the central line 11 of the crown beam 1 at the top of the foundation pit support structure. In this embodiment, the infrared transmitting tube VD1 is IR204-A and the infrared receiving tube VD2 is SFH5110.
The signal comparison module 52 is coupled to the infrared sensing module 51, and is provided with a threshold signal VREF to output a comparison signal when the infrared sensing signal is smaller than the threshold signal VREF.
The signal comparing module 52 includes a comparator N1, a first signal input end of the comparator N1 is coupled to the cathode of the infrared receiving tube VD2, a second signal input end of the comparator N1 is coupled to the threshold signal VREF, a signal output end of the comparator N1 is coupled to the prompting module 53, the first signal input end of the comparator N1 is a forward input end, and the second signal input end of the comparator N1 is a reverse input end.
The prompting module 53, coupled to the signal comparing module 52, receives the comparison signal to prompt that the infrared sensing circuit 5 has sensed that the horizontal displacement of the foundation pit support structure reaches a specified maximum value, and sends out a prompting signal.
The prompt module 53 includes an audible and visual alarm 531, where the audible and visual alarm 531 is connected in series with the emitter of the triode Q1 and then coupled to the power voltage VCC.
The embodiment 2 of the utility model relates to an automatic monitoring device for horizontal displacement of a foundation pit support structure, which comprises the following implementation principles:
the infrared rays emitted by the infrared transmitting tube VD1 are received by the infrared receiving tube VD2, the infrared sensing signals emitted by the infrared receiving tube VD2 are received by the comparator N1 to be larger than the threshold value signal VREF, the loop of the audible and visual alarm 531 is not conducted, the foundation pit support structure is continuously built, when the horizontal displacement of the foundation pit support structure reaches the specified maximum value, the infrared rays are blocked by the bevel scale 4 at the moment, the infrared sensing signals output by the infrared receiving tube VD2 are smaller than the threshold value signal VREF, the triode Q1 is powered on, the triode Q1 is conducted, the audible and visual alarm 531 is immediately conducted, and the audible and visual alarm 531 emits a prompt signal to prompt that the operator has detected that the horizontal displacement of the foundation pit support structure reaches the specified maximum value at the moment, and prompt of timely evacuation of operators and construction equipment in the foundation pit is carried out.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. The automatic monitoring device for the horizontal displacement of the foundation pit support structure is characterized by comprising an infrared receiver (2), an infrared transmitter (3) and an oblique angle graduated scale (4), wherein the infrared receiver (2) and the infrared transmitter (3) are respectively arranged at two ends of a central line (11) of a crown beam (1) at the top of the foundation pit support structure, and a red light wire harness (31) emitted by the infrared transmitter (3) and the central line (11) of the crown beam (1) are positioned on the same vertical plane; the oblique angle graduated scale (4) is arranged on the crown beam (1), the oblique angle graduated scale (4) is perpendicular to the central line (11) of the crown beam (1), the ruler tip part (41) of the oblique angle graduated scale (4) is attached to the central line (11) of the crown beam (1) and points to one side of a foundation pit, the distance between the red light wire harness (31) emitted by the infrared emitter (3) and the central line (11) of the crown beam (1) is marked as H, the largest horizontal deformation size of the foundation pit support structure is marked as L, the inclination angle of the oblique angle graduated scale (4) is marked as theta, and then H=tan theta is marked as L; the infrared receiver (2) and the infrared transmitter (3) are coupled with an infrared sensing circuit (5) for detecting whether the horizontal displacement of the foundation pit support structure reaches a specified maximum value or not; the infrared sensing circuit (5) comprises:
the infrared sensing module (51) is used for sensing whether the horizontal displacement of the foundation pit support structure reaches a specified maximum value and sending out an infrared sensing signal;
a signal comparison module (52) coupled to the infrared sensing module (51) and provided with a threshold signal VREF to output a comparison signal when the infrared sensing signal is less than the threshold signal VREF;
the prompting module (53) is coupled to the signal comparison module (52) and receives the comparison signal to prompt that the infrared sensing circuit (5) has sensed that the horizontal displacement of the foundation pit support structure reaches a specified maximum value at the moment, and sends out a prompting signal.
2. The automatic monitoring device for horizontal displacement of foundation pit support structure according to claim 1, wherein the bevel angle scale (4) is arranged at the center position of the center line (11) of the crown beam (1).
3. The automatic monitoring device for horizontal displacement of a foundation pit support structure according to claim 1, wherein the inclination angle θ of the bevel angle scale (4) ranges from 0 ° to 90 °, wherein θ is not equal to 0 ° and θ is not equal to 90 °.
4. The automatic monitoring device for horizontal displacement of a foundation pit enclosure structure according to claim 1, wherein the infrared sensing module (51) comprises an infrared transmitting tube VD1 and an infrared receiving tube VD2, the infrared transmitting tube VD1 is arranged at an infrared transmitter, the infrared receiving tube VD2 is arranged at an infrared receiver, an anode of the infrared transmitting tube VD1 is coupled to a power supply voltage VCC through a first resistor R1, and a cathode of the infrared transmitting tube VD1 is grounded; the anode of the infrared receiving tube VD2 is grounded, the cathode of the infrared receiving tube VD2 is coupled to the power supply voltage VCC through a second resistor R2, meanwhile, the cathode of the infrared receiving tube VD2 is coupled to the signal comparison module (52), the infrared transmitting tube VD1 is connected in parallel with a first capacitor C1, and the infrared receiving tube VD2 is connected in parallel with a second capacitor C2; the infrared transmitting tube VD1 is connected with the infrared receiving tube VD2 through infrared signals.
5. The automatic monitoring device for horizontal displacement of foundation pit support structure according to claim 4, wherein the infrared transmitting tube VD1 and the infrared receiving tube VD2 are respectively and fixedly installed at two ends of a central line (11) of a crown beam (1) at the top of the foundation pit support structure.
6. The automatic monitoring device for horizontal displacement of a foundation pit enclosure according to claim 1, wherein the signal comparison module (52) comprises a comparator N1, a first signal input end of the comparator N1 is coupled to the cathode of the infrared receiving tube VD2, a second signal input end of the comparator N1 is coupled to the threshold signal VREF, and a signal output end of the comparator N1 is coupled to the prompting module (53).
7. The automatic monitoring device for horizontal displacement of a foundation pit enclosure structure according to claim 1, wherein the prompting module (53) comprises an audible and visual alarm (531) and a triode Q1, a base series resistor R3 of the triode Q1 is coupled to the signal comparison module (52), an emitter of the triode Q1 and the audible and visual alarm (531) are coupled to a power supply voltage VCC after being connected in series, and a collector of the triode Q1 is grounded.
8. The automatic monitoring device for horizontal displacement of foundation pit support structure according to claim 7, wherein the audible and visual alarm (531) is fixed at one end of a center line (11) of a crown beam (1) at the top of the foundation pit support structure and is close to one side of the infrared receiver (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320587845.XU CN219551437U (en) | 2023-03-22 | 2023-03-22 | Automatic monitoring device for horizontal displacement of foundation pit support structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320587845.XU CN219551437U (en) | 2023-03-22 | 2023-03-22 | Automatic monitoring device for horizontal displacement of foundation pit support structure |
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| CN219551437U true CN219551437U (en) | 2023-08-18 |
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| CN202320587845.XU Active CN219551437U (en) | 2023-03-22 | 2023-03-22 | Automatic monitoring device for horizontal displacement of foundation pit support structure |
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