Device for automatically monitoring radial displacement of pipeline and monitoring method

Abstract

The invention discloses a device for automatically monitoring radial displacement of a pipeline, the horizontal extension direction of the underground pipeline is defined as the X direction, the horizontal vertical direction is defined as the Y direction, and the gravity direction is defined as the Z. The device comprises an arch frame, a slide rheostat and a contact monitoring unit, a plurality of hanging brackets extending downwards to the position above the ground are fixedly arranged in the middle of the arch frame in the Z direction, and sliding rheostats are fixedly arranged at the bottoms of the hanging brackets. The bottom of the contact monitoring unit is fixedly attached to the upper portion of the underground pipeline, and the upper portion of the contact monitoring unit extends out of the ground in a lifting adjustment mode and is in electric contact connection with the slide rheostat. The device and the monitoring method can continuously monitor the radial displacement of the pipeline at high precision in real time, are high in precision and do not need to be attended manually.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline monitoring, and in particular to a device and a monitoring method for automatically monitoring radial displacement of a pipeline. Background Art

[0002] Construction around pipelines may cause deformation and damage to the pipelines. Compared with the radial displacement of the pipeline, the axial displacement of the pipeline is smaller, so it is necessary to focus on monitoring the radial displacement of the pipeline. Traditional monitoring methods are difficult to achieve continuous and real-time monitoring, and the labor cost is high when the monitoring frequency is high. Therefore, the existing technology needs to be improved and upgraded. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a device and a monitoring method for automatically monitoring the radial displacement of a pipeline, which can monitor the radial displacement of the pipeline in real time with high accuracy and without manual supervision.

[0004] In order to solve the above problems, the present invention provides a device for automatically monitoring the radial displacement of a pipeline, wherein the horizontal extension direction of the underground pipeline is defined as the X direction, the horizontal vertical direction is defined as the Y direction, and the gravity direction is defined as the Z direction. The device comprises an arch frame, a sliding rheostat and a contact monitoring unit, wherein the arch frame is erected on the ground above the pipeline along the X direction, a plurality of hangers extending downward to above the ground are fixedly arranged in the middle Z direction of the arch frame, and a sliding rheostat is fixedly arranged at the bottom of the hanger; the bottom of the contact monitoring unit is fixedly attached to the top of the underground pipeline, and the upper lifting adjustment of the contact monitoring unit extends out of the ground and is electrically contacted with the sliding rheostat.

[0005] Preferably, the arch frame includes a main beam, a hanger and rigid legs, wherein the main beam is erected above the ground along the X-direction and the main beam's orthographic projection is aligned with the underground pipeline, both ends of the main beam in the X-direction are fixedly provided with rigid legs supported on the ground in the Z-direction, and the lower part of the main beam extends in the Z-direction and a plurality of hangers are arranged at intervals in the X-direction.

[0006] Preferably, the bottom end of the rigid support leg is fixed to the support leg foundation on the ground by an anchor bolt, and the top end of the rigid support is fixed to the ground by a wind rope and a ground anchor.

[0007] Preferably, power lines and signal lines connecting multiple sliding resistors are arranged inside the main beam and the hanger.

[0008] Preferably, the sliding resistor includes a transverse resistor and a longitudinal resistor, and the transverse resistor and the longitudinal resistor are arranged at intervals at the bottom ends of the plurality of hangers;

[0009] Both the transverse varistor and the longitudinal varistor include: a DC power supply, a parallel monitoring circuit, an insulating board and a copper wire, wherein the positive and negative terminals of the DC power supply are respectively connected to the parallel monitoring circuit and the copper wire; a plurality of first resistors are fixedly arranged at intervals in the middle section of the copper wire, and the middle section of the copper wire is reciprocatingly bent and arranged on the insulating board; the insulating board is fixedly suspended at the bottom end of the hanger, and the insulating board forms a U-shaped structure with an open bottom end, and the copper wires on the two opposite side walls of the insulating board are electrically contacted and connected to the two contacts of the parallel monitoring circuit; the parallel monitoring circuit includes two series circuits connected in parallel to each other, and each series circuit includes a digital ammeter and a second resistor connected in series.

[0010] Preferably, the copper wire is bent horizontally and arranged on the insulating plate of the transverse varistor; and the copper wire is bent vertically and arranged on the insulating plate of the longitudinal varistor.

[0011] Preferably, the contact monitoring unit includes a base, a telescopic rod and a contact; the base is fixedly mounted on the upper part of the circumferential outer wall of the underground pipeline, and a long level tube is fixedly mounted on the top surface of the base in the X direction and the Y direction respectively; the telescopic rod includes an outer tube, an inner rod and a contact rod, wherein the bottom end of the outer tube is fixedly mounted in the middle part of the base, the top end of the outer tube extends out of the ground in the Z direction, and the top end of the outer tube is fixed to the inner rod by a fixing pin; a plurality of contact rods are fixedly mounted at the top end of the inner rod at intervals along the Z direction and in the X direction; a spring and a contact are sleeved on the contact rod, wherein the contact sleeve is mounted on the free end of the contact rod, and the axial end face of the contact is elastically supported by the spring.

[0012] A monitoring method for a device for automatically monitoring radial displacement of a pipeline includes the following aspects:

[0013] a) When monitoring the radial displacement of the pipeline, first dig downward from the surface, and after the pipeline is exposed, remove the soil above the pipeline; then install the base, and fix the base to the outer wall of the pipeline with an adhesive;

[0014] b) The main beam and hanger of the arch frame are assembled from several trusses by bolts; the length of the main beam and the hanger are determined according to the site conditions; the arch frame is fixed to the ground by the outrigger foundation and wind ropes;

[0015] c) The measuring point consists of a base, an outer tube, an inner rod, a feeler rod and a fixing pin; the inner rod is provided with a number of circular holes along the height direction, and the outer tube is provided with two circular holes at the same height, and the inner rod is fixed to the outer tube by a fixing pin;

[0016] d) The DC power supply is a constant voltage source; the copper wire and the first resistor are connected in series and fixed on the insulating board, and are distributed in an S shape; the parallel copper wires are at equal distances, and the distance between the copper wires is not greater than 0.5 mm; the contact point is connected in series with the second resistor and the digital ammeter; the contact rod and the contact head are made of metal as the contact point on the copper wire; when the position of the metal contact changes, the current value of the digital ammeter also changes accordingly, and the current change is transmitted to the controller through the signal line;

[0017] In a lateral varistor, the horizontal displacement of the metal contact is linearly related to the change in current;

[0018] In a longitudinal varistor, the vertical displacement of the metal contact is linearly related to the change in current;

[0019] f) The controller automatically converts the current change into the horizontal or vertical displacement of the measuring point;

[0020] e) The horizontal displacement and vertical displacement of each measuring point can be transmitted to the receiving terminal through the wireless signal generated by the wireless signal generator installed on the bracket; when the displacement change rate (mm / d) or the cumulative displacement value (mm) exceeds the set alarm value, the alarm will send an alarm signal to remind the monitoring personnel to pay attention;

[0021] e) The power supply of the equipment is introduced from the power grid or a diesel generator is installed on site;

[0022] f) The monitoring frequency is set manually; the monitoring equipment can automatically monitor and record the monitoring data according to the set monitoring frequency.

[0023] The advantages of the present invention compared with the prior art are:

[0024] The invention discloses an automatic monitoring device and method for radial displacement of a pipeline. The radial deformation displacement of the pipeline is transmitted by a contact monitoring unit fixedly mounted on the underground pipeline. The contact monitoring unit electrically contacts a sliding rheostat to measure the resistance of the radial deformation of the pipeline. Finally, the sliding rheostat is positioned and mounted by an arch frame to ensure the monitoring position accuracy of the sliding rheostat. Then, according to the relative displacement between the sliding rheostat and the contact monitoring unit, the resistance variable between the electrical connection of the two is monitored to infer the deformation of the underground pipeline.

[0025] The invention discloses a device and a method for automatically monitoring radial displacement of a pipeline. The device and the method adopt a variable resistor to automatically monitor radial displacement of the pipeline, and the monitoring accuracy is high. The monitoring method can realize continuous monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a front view of the pipeline radial displacement monitoring device of the present invention;

[0028] Figure 2It is a side view of the arrangement of the pipeline radial displacement monitoring device in the present invention;

[0029] Figure 3 It is a structural schematic diagram of the contact monitoring unit in the present invention;

[0030] Figure 4 The schematic diagram of the circuit connection of the sliding resistor in the present invention (longitudinal resistor);

[0031] Figure 5 The figure is a circuit connection diagram of the sliding resistor in the present invention (lateral resistor);

[0032] Figure 6 It is a schematic diagram of calculating the displacement of the pipeline in the present invention;

[0033] In the figure: 1-main beam; 2-hanger; 3-sliding rheostat; 4-contact monitoring unit; 5-rigid support leg; 6-underground pipeline; 7-inner rod; 8-touch rod; 9-spring; 10-contact; 11-outer tube; 12-long level tube; 13-base; 14-copper wire; 15-insulating plate; 16-first resistor; 17-contact; 18-second resistor; 19-digital ammeter. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] Combination Figure 1 to Figure 6The present invention provides a device for automatically monitoring the radial displacement of a pipeline, defining the horizontal extension direction of an underground pipeline 6 as the X direction, the horizontal vertical direction as the Y direction, and the gravity direction as the Z direction. The device comprises an arch frame, a sliding rheostat 3, and a contact monitoring unit 4, wherein the arch frame is erected on the ground above the pipeline along the X direction, and a plurality of hangers extending downward to the ground are fixedly arranged in the middle Z direction of the arch frame, and a sliding rheostat is fixedly arranged at the bottom of the hanger; the bottom of the contact monitoring unit is fixedly attached to the top of the underground pipeline, and the upper lifting adjustment of the contact monitoring unit extends out of the ground and is electrically contacted with the sliding rheostat.

[0038] Preferably, the arch frame includes a main beam 1, a hanger 2 and a rigid support leg 5, wherein the main beam is erected above the ground along the X direction and the main beam's projection is aligned with the underground pipeline, both ends of the main beam in the X direction are fixed with rigid support legs supported on the ground in the Z direction, and the lower part of the main beam extends in the Z direction and a plurality of hangers are arranged at intervals in the X direction.

[0039] Preferably, the bottom end of the rigid support leg is fixed to the support leg foundation on the ground by an anchor bolt, and the top end of the rigid support is fixed to the ground by a wind rope and a ground anchor.

[0040] Preferably, power lines and signal lines connecting multiple sliding resistors are arranged inside the main beam and the hanger.

[0041] Preferably, the sliding resistor includes a transverse resistor and a longitudinal resistor, and the transverse resistor and the longitudinal resistor are arranged at intervals at the bottom ends of the plurality of hangers;

[0042] Both the transverse varistor and the longitudinal varistor include: a DC power supply, a parallel monitoring circuit, an insulating plate 15 and a copper wire 14, wherein the positive and negative terminals of the DC power supply are respectively connected to the parallel monitoring circuit and the copper wire; a plurality of first resistors 16 are fixedly arranged at intervals in the middle section of the copper wire, and the middle section of the copper wire is reciprocatingly bent and arranged on the insulating plate; the insulating plate is fixedly mounted on the bottom end of the hanger, and the insulating plate forms a U-shaped structure with an open bottom end, and the copper wires on the two opposite side walls of the insulating plate are electrically contacted and connected to the two contacts 17 of the parallel monitoring circuit; the parallel monitoring circuit includes two series circuits connected in parallel to each other, and each series circuit includes a digital ammeter 19 and a second resistor 18 connected in series.

[0043] Preferably, the copper wire is bent horizontally and arranged on the insulating plate of the transverse varistor; and the copper wire is bent vertically and arranged on the insulating plate of the longitudinal varistor.

[0044] Preferably, the contact monitoring unit includes a base 13, a telescopic rod and a contact 10; the base is fixedly mounted on the upper part of the circumferential outer wall of the underground pipeline, and a long level tube 12 is fixedly mounted on the top surface of the base in the X direction and the Y direction respectively; the telescopic rod includes an outer tube 11, an inner rod 7 and a contact rod 8, wherein the bottom end of the outer tube is fixedly mounted in the middle of the base, the top end of the outer tube extends out of the ground in the Z direction, and the top end of the outer tube is fixedly connected to the inner rod through a fixing pin and a lifting pin; a plurality of contact rods are fixedly mounted at the top end of the inner rod at intervals along the Z direction and in the X direction; a spring 9 and a contact are sleeved on the contact rod, wherein the contact sleeve is mounted on the free end of the contact rod, and the axial end face of the contact is elastically supported by the spring.

[0045] A monitoring method for a device for automatically monitoring radial displacement of a pipeline includes the following aspects:

[0046] a) When monitoring the radial displacement of the pipeline, first dig downward from the surface, and after the pipeline is exposed, remove the soil above the pipeline; then install the base, and fix the base to the outer wall of the pipeline with an adhesive;

[0047] b) The main beam and hanger of the arch frame are assembled from several trusses by bolts; the length of the main beam and the hanger are determined according to the site conditions; the arch frame is fixed to the ground by the outrigger foundation and wind ropes;

[0048] c) The measuring point consists of a base, an outer tube, an inner rod, a feeler rod and a fixing pin; the inner rod is provided with a number of circular holes along the height direction, and the outer tube is provided with two circular holes at the same height, and the inner rod is fixed to the outer tube by a fixing pin;

[0049] d) The DC power supply is a constant voltage source; the copper wire and the first resistor are connected in series and fixed on the insulating board, and are distributed in an S shape; the parallel copper wires are at equal distances, and the distance between the copper wires is not greater than 0.5 mm; the contact point is connected in series with the second resistor and the digital ammeter; the contact rod and the contact head are made of metal as the contact point on the copper wire; when the position of the metal contact changes, the current value of the digital ammeter also changes accordingly, and the current change is transmitted to the controller through the signal line;

[0050] In a lateral varistor, the horizontal displacement of the metal contact is linearly related to the change in current;

[0051] In a longitudinal varistor, the vertical displacement of the metal contact is linearly related to the change in current;

[0052] f) The controller automatically converts the current change into the horizontal or vertical displacement of the measuring point;

[0053] e) The horizontal displacement and vertical displacement of each measuring point can be transmitted to the receiving terminal through the wireless signal generated by the wireless signal generator installed on the bracket; when the displacement change rate (mm / d) or the cumulative displacement value (mm) exceeds the set alarm value, the alarm will send an alarm signal to remind the monitoring personnel to pay attention;

[0054] e) The power supply of the equipment is introduced from the power grid or a diesel generator is installed on site;

[0055] f) The monitoring frequency is set manually; the monitoring equipment can automatically monitor and record the monitoring data according to the set monitoring frequency.

[0056] The working principle of the present invention is: when the pipeline changes due to changes in the surrounding environment (such as excavation, piling, etc.), displacement and deformation will occur. Excessive deformation may cause cracking of the pipeline and then cause accidents (such as gas leakage, tap water gushing). Therefore, it is very important to monitor the displacement of the pipeline in time. Compared with the radial displacement of the pipeline, the axial displacement of the pipeline is smaller, so it is necessary to focus on monitoring the radial displacement of the pipeline. The radial displacement of the pipeline can be decomposed into horizontal displacement ΔX, vertical displacement ΔY and angle Δθ. When installing the measuring point, the plumbness of the inner rod must be ensured. When the bubbles of the two long level tubes perpendicular to each other above the base are centered, the inner rod is in the plumb direction. Record the radius R of the pipeline at the measuring point (the distance from the center to the outer surface of the pipeline), the distance H1 from the outer diameter of the pipeline to the contact 2, the distance H2 from the contact 1 to the contact 2, and the distance L from the contact 1 to the center of the pipeline = R + H1 + H2. Input the above values ​​into the controller, which can record the above values ​​and set the coordinate value of the center point of the pipeline to (0,0), the coordinate value of contact 1 to (X1, Y1) (where X1 = 0, Y1 = L), and the coordinate value of contact 2 to (X2, Y2) (where X2 = 0, Y2 = R + H1). Figure 6 ), contact 1 and contact 2 move to new positions. Since the change in the horizontal displacement and vertical displacement of the contact are proportional to the change in the current (the proportional coefficient is calibrated in advance and stored in the controller), the coordinate increments of the contact in the X and Y directions can be calculated based on the change in current, and then the new coordinates of contact 1 (X3, Y3) and contact 2 (X4, Y4) are obtained. Then the horizontal displacement ΔX = X3-X1 + LsinΔθ, the vertical displacement ΔY = Y3-Y1 + L(1-cosΔθ) and the pipeline rotation angle Δθ = arctan(X1-X2) / (Y1-Y2)-arctan(X3-X4) / (Y3-Y4) of the center point of the pipeline at the measuring point are calculated.

[0057] The pipeline radial displacement automatic monitoring device is mainly composed of a bracket, a measuring point, a sliding rheostat, a power supply, a cable, a controller, a wireless signal generator, a receiving device, etc. The monitoring includes the following steps:

[0058] a) Clear the soil above the pipe test points (test point 1, test point 2, test point 3, etc.) and clean the outer surface of the pipe. Install the test point base, and fix the base to the pipe with an adhesive;

[0059] b) Install rigid outriggers, main beams, hangers, anchor bolts, outrigger foundations, wind ropes, ground anchors, etc. to form a rigid support;

[0060] c) Install the sliding rheostat, equipment power supply, controller, wireless signal generator, and receiving device;

[0061] d) Install the outer tube and inner rod at the measuring point, adjust the height of the inner rod and fix it to the outer tube with a fixing pin.

[0062] e) Check the contact between the contacts and the sliding rheostat to ensure good contact.

[0063] f) Debug the equipment and set the monitoring frequency (e.g. once / h).

[0064] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A device for automatically monitoring radial displacement of a pipeline, defining the horizontal extension direction of the underground pipeline as the X direction, the horizontal vertical direction as the Y direction, and the gravity direction as the Z direction, characterized in that: The device comprises an arch frame, a sliding rheostat and a contact monitoring unit, wherein the arch frame is erected on the ground above the pipeline along the X direction, a plurality of hangers extending down to the ground are fixedly arranged in the middle of the arch frame in the Z direction, and a sliding rheostat is fixedly arranged at the bottom of the hanger; the bottom of the contact monitoring unit is fixedly attached to the top of the underground pipeline, and the upper lifting adjustment of the contact monitoring unit extends out of the ground and is electrically contacted with the sliding rheostat.

2. The device for automatically monitoring radial displacement of a pipeline according to claim 1, characterized in that: The arch frame includes a main beam, a hanger and rigid legs, wherein the main beam is erected above the ground along the X direction and the main beam's orthographic projection is aligned with the underground pipeline, both ends of the main beam in the X direction are fixed with rigid legs supported on the ground in the Z direction, and the lower part of the main beam extends in the Z direction and a plurality of hangers are arranged at intervals in the X direction.

3. The device for automatically monitoring radial displacement of a pipeline according to claim 2, characterized in that: The bottom end of the rigid support leg is fixed to the support leg foundation on the ground through an anchor bolt, and the top end of the rigid support is fixed to the ground by a wind rope and a ground anchor.

4. The device for automatically monitoring radial displacement of a pipeline according to claim 2, characterized in that: Power lines and signal lines connected to multiple sliding resistors are arranged in the main beam and the hanger.

5. The device for automatically monitoring radial displacement of a pipeline according to claim 1, characterized in that: The sliding resistor includes a transverse resistor and a longitudinal resistor, and the transverse resistor and the longitudinal resistor are arranged at intervals at the bottom ends of a plurality of hangers; The transverse varistor and the longitudinal varistor both include: a DC power supply, a parallel monitoring circuit, an insulating plate and a copper wire, wherein the positive and negative terminals of the DC power supply are respectively connected to the parallel monitoring circuit and the copper wire; a plurality of first resistors are fixedly arranged at intervals in the middle section of the copper wire, and the middle section of the copper wire is reciprocatingly bent and arranged on the insulating plate; the insulating plate is fixedly suspended at the bottom end of the hanger, the insulating plate forms a U-shaped structure with an open bottom end, and the copper wires on the two opposite side walls of the insulating plate are electrically contacted and connected to the two contacts of the parallel monitoring circuit; the parallel monitoring circuit includes two series circuits connected in parallel to each other, and each series circuit includes a digital ammeter and a second resistor connected in series.

6. The device for automatically monitoring radial displacement of a pipeline according to claim 5, characterized in that: The insulating plate of the transverse resistor is bent horizontally and a copper wire is arranged; the insulating plate of the longitudinal resistor is bent vertically and a copper wire is arranged.

7. The device for automatically monitoring radial displacement of a pipeline according to claim 1, characterized in that: The contact monitoring unit includes a base, a telescopic rod and a contact; the base is fixedly mounted on the upper part of the circumferential outer wall of the underground pipeline, and a long level tube is fixedly mounted on the top surface of the base in the X direction and the Y direction respectively; the telescopic rod includes an outer tube, an inner rod and a contact rod, wherein the bottom end of the outer tube is fixedly mounted in the middle part of the base, the top end of the outer tube extends out of the ground in the Z direction, and the top end of the outer tube is fixed to the inner rod by a fixing pin; a plurality of contact rods are fixedly mounted at the top end of the inner rod at intervals along the Z direction and in the X direction; a spring and a contact are sleeved on the contact rod, wherein the contact is sleeved on the free end of the contact rod, and the axial end face of the contact is elastically supported by the spring.

8. A monitoring method for an automatic monitoring device for radial displacement of a pipeline as claimed in claim 1, characterized in that: These include: a) When monitoring the radial displacement of the pipeline, first dig downward from the surface, and after the pipeline is exposed, remove the soil above the pipeline; then install the base, and fix the base to the outer wall of the pipeline with an adhesive; b) The main beam and hanger of the arch frame are assembled from several trusses by bolts; the length of the main beam and the hanger are determined according to the site conditions; the arch frame is fixed to the ground by the outrigger foundation and wind ropes; c) The measuring point consists of a base, an outer tube, an inner rod, a feeler rod and a fixing pin; the inner rod is provided with a number of circular holes along the height direction, and the outer tube is provided with two circular holes at the same height, and the inner rod is fixed to the outer tube by a fixing pin; d) The DC power supply is a constant voltage source; the copper wire and the first resistor are connected in series and fixed on the insulating board, and are distributed in an S shape; the parallel copper wires are at equal distances, and the distance between the copper wires is not greater than 0.5 mm; the contact point is connected in series with the second resistor and the digital ammeter; the contact rod and the contact head are made of metal as the contact point on the copper wire; when the position of the metal contact changes, the current value of the digital ammeter also changes accordingly, and the current change is transmitted to the controller through the signal line; In a lateral varistor, the horizontal displacement of the metal contact is linearly related to the change in current; In a longitudinal varistor, the vertical displacement of the metal contact is linearly related to the change in current; f) The controller automatically converts the current change into the horizontal or vertical displacement of the measuring point; e) The horizontal displacement and vertical displacement of each measuring point can be transmitted to the receiving terminal through the wireless signal generated by the wireless signal generator installed on the bracket; when the displacement change rate (mm / d) or the cumulative displacement value (mm) exceeds the set alarm value, the alarm will send an alarm signal to remind the monitoring personnel to pay attention; e) The power supply of the equipment is introduced from the power grid or a diesel generator is installed on site; f) The monitoring frequency is set manually; the monitoring equipment can automatically monitor and record the monitoring data according to the set monitoring frequency.

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