Buried vibration sensing equipment

Abstract

The utility model belongs to the technical field of vibration detection, and particularly provides a buried vibration sensing device which comprises a base, a shell, a control element, an inductor element and a battery pack, the control element, the inductor element and the battery pack are arranged in the shell, the control element is stacked above the inductor element, an induction cone is vertically arranged on the bottom face of the base in a penetrating mode, and the induction cone is arranged in the shell. The sensing cone is in contact with the sensor element; components in the sensor are stacked to reduce the overall size, carrying and burying operation are more convenient, meanwhile, the induction cone is arranged in the device in a penetrating mode, after the device is buried, the induction cone can be better coupled with the surrounding environment, vibration can be directly transmitted to the position of an inductor in the device, and the device is more convenient to use. The problem that the detection sensitivity of the inductor is reduced due to the fact that vibration is influenced by errors such as gaps generated by assembly of all parts of equipment is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration detection, and specifically provides an underground vibration sensing device. Background Art

[0002] Detection and early warning are a major challenge for unmanned border and field surveillance. For example, passive infrared detectors lack concealment and are prone to false alarms, while optical fiber vibration detectors are expensive to maintain. Furthermore, buried vibration sensors commonly used for earthquake monitoring are primarily based on piezoelectric and MEMS sensing principles, resulting in low sensitivity and difficulty identifying human-generated noise sources. Therefore, a vibration sensor device that can be concealed and accurately detect human-generated noise is urgently needed. Utility Model Content

[0003] The utility model provides an underground vibration sensing device, which solves the problems in the prior art that the sensor is difficult to hide and bury, the detection parameters are unstable, and the detection sensitivity is low.

[0004] The technical solution of the utility model is as follows:

[0005] A buried vibration sensing device includes a base, a shell, and a control element, a sensor element and a battery pack arranged in the shell. The control element is stacked on the sensor element. A sensing cone is vertically penetrated through the bottom surface of the base, and the sensing cone is in contact with the sensor element.

[0006] This solution stacks the sensor's internal components to reduce its overall size, making it easier to carry and bury. Furthermore, a sensing cone is inserted into the device, allowing it to better couple with the surrounding environment when buried. This allows vibrations to be transmitted directly to the sensor inside the device, preventing vibrations from being affected by gaps between the device's components, which could reduce the sensor's sensitivity. Furthermore, a built-in battery pack provides long-term power to the device, eliminating the need for wiring and installation, making the device more discreet.

[0007] Preferably, a mounting seat is provided inside the base, and a plurality of legs for mounting the sensor element are provided on the mounting seat.

[0008] In this solution, the sensor element is mounted on a mounting base, which is connected to the sensor element via multiple legs. This ensures that vibrations acting on the mounting base are fully transmitted to the sensor element. Furthermore, the separate mounting base, rather than the sensor element being directly mounted on the base, facilitates modularization of the device base and mounting base, reducing manufacturing complexity.

[0009] Preferably, the sensor element is a force-balanced velocity sensor. Using a force-balanced velocity sensor, the acceleration generated by vibration can be transmitted to a displacement transducer via a mechanical pendulum, outputting the vibration as a velocity signal. During the detection process, the mechanical pendulum receives electromagnetic force balance feedback, reducing the amplitude of motion and achieving higher detection sensitivity. This reduces mechanical strain on the entire sensor, consumes less energy, and maintains stable element sensitivity over time.

[0010] Preferably, a rubber sleeve is provided between the sensing cone and the base. The rubber sleeve fills the gap between the sensing cone and the base, preventing moisture from entering the device when buried and potentially dampening the electrical components. Furthermore, the rubber sleeve prevents the base from absorbing some of the vibration transmitted by the sensing cone, thereby improving the sensitivity of the sensing component detection.

[0011] Preferably, the sensing cone includes an inner cone and an outer cone, the inner cone is fixedly inserted into the mounting seat, one end of the inner cone abuts against the mechanical pendulum sensing part of the force balance speed sensor, and the other end is detachably connected to the outer cone, and the outer cone extends out of the bottom surface of the base.

[0012] Because part of the sensing cone is external and receives vibrations, this buried part is exposed to moisture, salt, and other elements in the soil, causing it to gradually rust, which in turn affects the transmission of vibrations. Subsequent maintenance requires the entire sensing cone to be replaced, which is not only cumbersome to disassemble, but also because the sensing cone needs to be in contact with the sensing components to transmit vibrations. Repeated disassembly and replacement of the sensing cone will seriously affect the contact between the sensing cone and the sensing components, thereby reducing the sensitivity of the device. In this solution, the external portion of the sensing cone is set as a detachable outer cone. Subsequent maintenance and replacement only requires replacing the outer cone, without disassembling the device.

[0013] Preferably, a positioning rotating rod is provided on the base, and the positioning rotating rod is rotatably connected to the side surface of the base.

[0014] Over time, vibration sensing equipment buried vertically in the soil can deflect and shift due to factors such as earthquakes, changes in soil moisture content, and interference from plants and animals, affecting the device's measurement sensitivity. In this solution, a limit rod is installed on the side of the base. When the device is buried, the limit rod rotates and extends perpendicular to the side. Having limit rods on both sides of the device prevents displacement in the soil when buried. Furthermore, when not installed, the limit rod rotates to fit the side of the base, maintaining the overall size of the device.

[0015] Preferably, an auxiliary induction cone is provided on the side surface of the base, and the auxiliary induction cone is inserted into the mounting seat.

[0016] In this solution, because the mounting base, which directly connects to the sensor element, is not integral to the base, a gap is inevitably created when the two are installed together. Furthermore, the mounting base is located within the base, without direct contact with the outside world. Therefore, vibrations received by the sensor element are inevitably lost. An auxiliary sensing cone, directly connected to the mounting base, is installed on the base. This cone transmits vibrations directly to the mounting base, thereby reducing the loss of vibration detected by the sensor element. The cone also acts as a limiter, preventing the device from shifting or deflecting due to other factors when buried in the soil.

[0017] Preferably, the auxiliary sensing cone and the base are directly provided with the rubber sleeve. A rubber sleeve, similar to the one used between the auxiliary sensing cone and the base, is provided between the auxiliary sensing cone and the base. This similarly prevents moisture from entering the device when buried, potentially dampening the electrical components within. Furthermore, the rubber sleeve prevents the base from absorbing some of the vibration transmitted by the auxiliary sensing cone, thereby improving the sensitivity of sensing component detection.

[0018] Existing buried vibration sensors require pre-existing trenches dug in the bottom surface for wiring, and data is transmitted between sensors via connecting wires, which is cumbersome to lay out and easily damaged. Therefore, the control element is preferably positioned above the sensor element via a long connecting rod. The control element is equipped with a GPS unit, which transmits the device's vibration detection status data to an external server via radio signals, while also providing a certain degree of positioning.

[0019] Preferably, the control element is provided with a wireless transmission module, and the wireless transmission module cooperates with the GPS unit to transmit the data detected by the device to the cloud over a long distance for real-time monitoring.

[0020] Beneficial effects of the utility model:

[0021] The utility model stacks the components inside the sensor to reduce the overall volume, making it easier to carry and bury. At the same time, a sensing cone is installed in the device so that after the device is buried, the sensing cone can better couple with the surrounding environment and can directly transmit the vibration to the sensor position inside the device, avoiding the vibration being affected by errors such as gaps generated by the assembly of various parts of the device, resulting in reduced detection sensitivity of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1It is a three-dimensional schematic diagram of the utility model;

[0024] Figure 2 It is a three-dimensional schematic diagram of the utility model in a buried state;

[0025] Figure 3 For this utility model Figure 2 Front view in ;

[0026] Figure 4 This is a partial cross-sectional view of another embodiment of the present invention.

[0027] In the above drawings, the corresponding reference numerals are as follows:

[0028] 1-base, 2-housing, 3-control element, 4-sensor element, 5-battery pack, 6-sensor cone, 61-inner cone, 62-outer cone, 7-mounting seat, 8-rubber sleeve, 9-positioning rotating rod, 10-auxiliary sensing cone, 101-auxiliary inner cone, 102-auxiliary outer cone, 11-GPS unit, 12-long screw. DETAILED DESCRIPTION

[0029] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely described through the specific implementation methods of the embodiments of the present invention.

[0030] Example 1:

[0031] like Figure 1 The buried vibration sensing device shown includes a base 1, a shell 2, and a control element 3, a sensor element 4 and a battery pack 5 arranged in the shell 2. The control element 3 is stacked on top of the sensor element 4. A sensing cone 6 is vertically penetrated through the bottom surface of the base 1, and the sensing cone 6 is in contact with the sensor element 4.

[0032] Specifically, the control element 3 utilizes a PCB capable of data acquisition and processing, and the sensor element 4 preferably utilizes a force-balance velocity sensor. The PCB is positioned above the force-balance velocity sensor via a long internally threaded screw 12 supported on the base 1. The housing 2 is plastic and bolted to the base 1. A sealing pad can be provided between the housing 2 and the base 1, or the connection between the housing 2 and the base 1 can be sealed directly with sealant to prevent internal moisture. The components within the sensor are stacked to reduce the overall volume, making it easier to carry and bury. The internal battery pack 5 utilizes a large-capacity lithium battery to power the other internal components. At the same time, a sensing cone 6 is inserted into the device, allowing it to better couple with the surrounding environment after being buried. It can also transmit vibrations directly to the sensor location inside the device, preventing vibrations from being affected by errors such as gaps in the assembly of various parts of the device, which could lead to reduced sensor detection sensitivity. The force-balanced velocity sensor can transmit the acceleration generated by vibration to the displacement transducer through a mechanical pendulum, outputting the vibration as a velocity signal. During the detection process, the mechanical pendulum receives electromagnetic force balance feedback, reducing the amplitude of movement, stabilizing the sensitivity of the entire sensor element 4, and effectively reducing mechanical strain. The sensing cone 6 directly contacts the mechanical pendulum sensing portion of the force-balanced velocity sensor, enabling the force-balanced velocity sensor to directly detect external vibrations, thereby improving the sensitivity of the sensor element 4 and making the detection data more accurate.

[0033] Furthermore, the base 1 is internally provided with a mounting base 7, which is provided with multiple legs for mounting the sensor element 4. The force balance velocity sensor is mounted on the mounting base 7, and each leg is fixedly connected to the force balance velocity sensor via a bolt (not shown). The mounting base 7 is connected to the sensor element 4 via multiple legs, ensuring that vibrations acting on the mounting base 7 are fully transmitted to the sensor element 4. Furthermore, providing a separate mounting base 7, rather than directly placing the sensor element 4 on the base 1, facilitates modularization of the device base 1 and mounting base 7, reducing manufacturing complexity.

[0034] Furthermore, the sensing cone 6 includes an inner cone 61 and an outer cone 62. The inner cone 61 is fixedly inserted into the mounting seat 7. The inner cone 61 is fixed in the mounting seat 7. One end of the inner cone 61 extends out of the mounting seat 7 and abuts against the mechanical pendulum sensing part of the force balance speed sensor. The other end is detachably connected to the outer cone 62. The outer cone 62 extends out of the bottom surface of the base 1.

[0035] It should be noted that because part of the sensing cone 6 is external and receives vibrations, this buried part is subject to the effects of moisture, salt, and other elements in the soil, gradually corroding, which in turn affects the transmission of vibrations. Subsequent maintenance requires the entire sensing cone 6 to be replaced. This is not only cumbersome to disassemble, but because the sensing cone 6 needs to be in contact with the sensing components to transmit vibrations, repeated disassembly and replacement of the sensing cone 6 will seriously affect the contact state between the sensing cone 6 and the sensing components, thereby reducing the sensitivity of the device. In this solution, the external portion of the sensing cone 6 is provided as a detachably connected outer cone 62. Subsequent maintenance and replacement only requires the replacement of the outer cone 62, without disassembling the device.

[0036] At the same time, the inner cone 61 of the sensing cone 6 contacts the sensor element 4. The height of the inner cone 61 can be slightly higher than the mounting plane of the sensor element 4. When the sensor element 4 is fixed to the mounting base 7 via bolts, the contact surfaces of the sensing cone 6 and the sensor element 4 are in abutment, i.e., the abutment force of the top surface of the inner cone 61 balances the mechanical pendulum sensing portion of the speed sensor. Alternatively, bolts can be inserted through the sensor element 4 and from the top surface of the inner cone 61, thereby securing the sensor element 4 to the sensing cone 6. This allows the sensing cone 6 to sense external vibrations and directly transmit the vibrations to the internal sensor element 4.

[0037] Furthermore, a rubber sleeve 8 is provided between the sensing cone 6 and the base 1. This fills the gap between the sensing cone 6 and the base 1, preventing moisture from entering the device when buried and potentially dampening the electrical components. Furthermore, the rubber sleeve 8 prevents the base 1 from absorbing some of the vibrations transmitted by the sensing cone 6, thereby improving the sensitivity of the sensing components.

[0038] Example 2:

[0039] Over time, due to factors such as earthquakes, changes in soil water content, and interference from plants and animals, the vibration sensing equipment buried vertically in the soil will deflect and shift, affecting the measurement sensitivity of the equipment. Therefore, this embodiment is based on the first embodiment. Figures 2 to 3 A positioning rotating rod 9 is provided on the base 1 , and the positioning rotating rod 9 is rotatably connected to the side surface of the base 1 .

[0040] Specifically, a groove adapted to the length of the limit rod is provided on the side of the base 1, and one end of the limit rod is rotatably provided at one end of the groove. When in the storage state, the rod body is in the groove on the side of the base 1, which does not affect the volume of the limit rod when it is not expanded. When the equipment is buried and installed, the limit rod rotates and extends perpendicularly to the side. It should be noted that the rotation of the limit rod requires a certain resistance, that is, the joint at the rotating connection is set relatively tightly, and the rotation friction is relatively large, so as to prevent the limit rod from being easily rotated. The limit rod is provided on the side of the equipment, such as Figure 2The long side shown can be equipped with two limit rods on one surface. When the limit rods are deployed and buried, they act as a limit rod in the soil, preventing the device from moving. When not installed, the limit rods rotate to fit against the side of the base 1, without affecting the overall size of the device.

[0041] Furthermore, since the mounting base 7 and the base 1 that are in direct contact with the sensor element 4 are not an integral structure, there will inevitably be a gap between the two when they are installed together, and the mounting base 7 is set in the base 1 and has no direct contact with the outside world, the vibration received by the sensor element 4 will inevitably be lost. Figure 4 As shown, the side of the base 1 is provided with an auxiliary induction cone 10, and the auxiliary induction cone 10 is inserted into the mounting seat 7. It should be noted that, Figure 4 After the auxiliary sensing cone 10 is set, the limit rotating rod is not set. The setting method includes but is not limited to setting only the limit rotating rod or the auxiliary sensing cone 10, or setting both.

[0042] Specifically, like the sensing cone 6, the auxiliary sensing cone 10 comprises an auxiliary inner cone 101 and an auxiliary outer cone 102. The auxiliary inner cone 101 and the auxiliary outer cone 102 are detachably connected, and the auxiliary inner cone 101 is fixedly mounted in the mounting base 1. The auxiliary sensing cone 10, which is directly connected to the mounting base 7 and passes through the base 1, directly transmits vibrations to the mounting base 7, thereby reducing the loss of vibration detected by the sensor element 4. The auxiliary sensing cone 10 also serves as a position limiter, preventing the device from shifting or deflecting due to other factors when buried in the soil.

[0043] At the same time, when the auxiliary sensing cone 10 is not provided, there is no need to open the corresponding mounting hole on the base 1. When the auxiliary sensing cone 10 is required, the rubber sleeve 8 is directly provided between the auxiliary sensing cone 10 and the base 1. The same rubber sleeve 8 as that between the sensing cone 6 and the base 1 is provided between the auxiliary sensing cone 10 and the base 1, which also prevents moisture from entering the interior of the device when the device is buried, causing the electrical components inside the device to get damp. At the same time, the rubber sleeve 8 prevents the base 1 from absorbing part of the vibration transmitted by the auxiliary sensing cone 10, thereby improving the sensitivity of the sensing component detection.

[0044] Example 3:

[0045] In order to realize wireless transmission of device data, the control element 3 is arranged above the sensor element 4 through a long connecting rod. A GPS unit 11 is provided on the control element 3. The GPS unit 11 transmits the device seismic detection status data to an external server through radio signals, and can also achieve a certain positioning effect.

[0046] Furthermore, the control element 3 is provided with a wireless transmission module. By setting up the wireless transmission module, in conjunction with the GPS unit, the data detected by the device can be transmitted over a long distance to the cloud for real-time monitoring. The wireless transmission module preferably adopts an LPWAN technology module, which can independently realize long-distance, low-power data and signal transmission.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of protection claimed by the present invention.

Claims

1. An underground vibration sensing device, characterized in that: The invention comprises a base (1), a shell (2), a control element (3), a sensor element (4) and a battery pack (5) arranged in the shell (2), wherein the control element (3) is stacked above the sensor element (4), a sensing cone (6) is vertically penetrated through the bottom surface of the base (1), and the sensing cone (6) contacts the sensor element (4); a mounting seat (7) is provided inside the base (1), and a plurality of legs for mounting the sensor element (4) are provided on the mounting seat (7); the sensor element (4) is a force balance speed sensor; a rubber sleeve (8) is provided between the sensing cone (6) and the base (1); the sensing cone (6) comprises an inner cone (61) and an outer cone (62), wherein the inner cone (61) is fixedly penetrated through the mounting seat (7), one end of the inner cone (61) abuts against the mechanical pendulum sensing portion of the force balance speed sensor, and the other end is detachably connected to the outer cone (62), and the outer cone (62) extends out of the bottom surface of the base (1).

2. The underground vibration sensing device according to claim 1, characterized in that: A positioning rotating rod (9) is provided on the base (1), and the positioning rotating rod (9) is rotatably connected to the side surface of the base (1).

3. The underground vibration sensing device according to claim 2, characterized in that: An auxiliary induction cone (10) is provided on the side surface of the base (1), and the auxiliary induction cone (10) is inserted into the mounting seat (7).

4. The underground vibration sensing device according to claim 3, characterized in that: The auxiliary sensing cone (10) and the base (1) are directly provided with the rubber sleeve (8).

5. The underground vibration sensing device according to claim 1, characterized in that: The control element (3) is arranged above the sensor element (4) via a long connecting rod, and a GPS unit (11) is arranged on the control element (3).

6. The underground vibration sensing device according to claim 5, characterized in that: The control element (3) is provided with a wireless transmission module.

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