Landslide alarm sensor and alarm device

Abstract

The invention discloses a landslide alarm sensor and an alarm device. The sensor comprises a fixed metal contact which is arranged on an insulating column as a first conductor and is connected with one pole of an alarm circuit; the movable metal contact is mounted at the front end of the insulating spring piece, serves as a second conductor and is connected with the other pole of the alarm circuit; the insulating heavy ball is placed in a limiting groove in the insulating plate, so that the insulating spring piece deforms, the fixed metal contact and the movable metal contact are separated, and the alarm circuit is switched off; when the insulating heavy ball rolls down, the insulating spring piece recovers deformation, the two metal contacts are in contact, and the alarm circuit is connected. The landslide alarm device comprises the landslide alarm sensor, a device shell, an anti-interference module and a communication module. Based on the gravity principle, the landslide alarm device is reliable in working principle, simple in structure and good in sensitivity, and the landslide timely alarm function is achieved through the simple physical principle and the photoelectric technology.

Description

Technical Field

[0001] The invention belongs to the technical field of sensors, and in particular relates to a landslide alarm sensor and an alarm device. Background Art

[0002] Landslide is a geological disaster that seriously damages human life and property safety. It is mainly manifested in that mountains or rocks are affected by earthquakes, rain erosion and other factors, and slide down along the weak slope under the action of gravity.

[0003] Currently, there are devices that monitor landslides through tilt angle, soil moisture and rainfall sensors, and are equipped with GPS positioning to obtain the location of landslides; there are also devices that monitor and warn by laying optical fibers inside the mountains. However, the laying cost of these devices is expensive, and the monitoring area is small, which cannot meet the life safety protection needs of people in economically underdeveloped areas where landslides occur frequently. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a low-cost landslide alarm sensor and an alarm device with simple structure and good sensitivity.

[0005] A first aspect of the present invention provides a landslide alarm sensor, comprising:

[0006] A fixed metal contact is placed on the insulating column as a first conductor and connected to one pole of the alarm circuit;

[0007] The movable metal contact is installed at the front end of the insulating spring sheet and serves as the second conductor to connect the other pole of the alarm circuit;

[0008] An insulating heavy ball is placed on an insulating plate to deform the insulating spring sheet, separating the fixed metal contact and the movable metal contact, thereby disconnecting the alarm circuit; when the insulating heavy ball rolls down, the insulating spring sheet recovers its deformation, the fixed metal contact contacts the movable metal contact, and the alarm circuit is connected.

[0009] A second aspect of the present invention provides a landslide alarm device, comprising the above-mentioned landslide alarm sensor, and further comprising:

[0010] The device casing is ellipsoidal, which can reduce the possible damage to the casing during landslides;

[0011] Anti-interference module, the outer shell is painted with bright colors, and multiple thin spikes are evenly inserted to prevent interference from animals;

[0012] Communication module, sends specific location information after the sensor alarm.

[0013] The beneficial effects of the present invention are as follows:

[0014] The landslide alarm sensor of the present invention is based on the principle of gravity, has a reliable working principle, a simple structure, a low cost, and good sensitivity. It realizes the timely alarm function of landslides through simple physical principles and photoelectric technology, and does not require chips and algorithms.

[0015] The landslide alarm device of the present invention is suitable for steep mountains where optical fiber cannot be laid over a large area, and an anti-interference module is provided so that the device will not give false alarms due to animal interference. At the same time, the device has a high sensitivity and will not miss alarms during landslides.

[0016] Due to its low cost, the device can be installed in batches in mountainous areas around mountain villages to increase the monitoring area. The device can be powered by solar energy and has ultra-long battery life. After a landslide occurs, it will promptly send out sound and light alarm signals to remind the evacuation of surrounding people. At the same time, it will send out a signal with location information to notify personnel to take emergency measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 It is a stereogram of a landslide alarm sensor device;

[0019] Figure 2 It is a force analysis diagram of the insulating heavy ball in the limiting groove before and after the device is tilted;

[0020] Figure 3 It is a relationship diagram of the distance between the main components before and after the insulating heavy ball rolls down;

[0021] Figure 4 It is a cross-sectional diagram showing the status of the alarm device before and after the landslide. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and preferred examples, and the purpose and effects of the present invention will become more clear. It should be understood that the specific examples described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Embodiment 1

[0024] Embodiment 1 of the present application provides a landslide alarm sensor, such as Figure 1 As shown, including:

[0025] The insulating plate 1 and the main body of the sensor are mounted on the plane of the insulating plate, and the plane has a rectangular groove 10, i.e., a limiting groove, which is used to temporarily limit the insulating heavy ball;

[0026] An alarm circuit, comprising a power source 2, a wire 3 and an alarm 4;

[0027] A fixed copper contact 5, as a first conductor, connected to one pole of the alarm circuit, is mounted on top of an insulating column 6;

[0028] The movable copper contact 9 is fixed to the front end of the insulating spring sheet 7, and the rear end is fixed to the insulating plate 1 by screws 8, serving as the second conductor, connected to the other pole of the alarm circuit.

[0029] The insulating heavy ball 11 can separate the copper contact 5 and the movable copper contact 9 when it is stabilized in the rectangular groove 10 on the insulating plate 1; when it rolls down in the direction 12 perpendicular to the plane where the fixed copper contact 5 and the movable copper contact 9 are located, the alarm circuit is connected and the sensor sends out an audible and visual alarm signal to remind personnel to evacuate.

[0030] The oval housing 13, the above-mentioned landslide alarm sensor element is encapsulated in the oval housing, and the sound and light alarm 4 is located outside the housing.

[0031] The basic principle of the landslide alarm sensor in the embodiment of the present application is:

[0032] The landslide alarm sensor uses the principle of gravity. When the tilt angle is too large, the insulating heavy ball rolls down under the action of gravity, and the alarm circuit is connected. Figure 2 As shown in a, when the sensor is placed horizontally, the insulating heavy ball is stuck in the rectangular groove of the insulating plate. At this time, the gravity G on the insulating heavy ball and the support force F of the insulating plate N1 and F N2 Balanced, the two copper contacts are isolated, therefore, the alarm circuit will not be connected.

[0033] like Figure 2 As shown in b, when a landslide occurs and the sensor tilts, the insulating heavy ball rolls down due to unbalanced force, the spring sheet falls due to the restoring force and gravity, the two copper contacts come into contact (magnets ensure the connection), and the alarm circuit is turned on.

[0034] This application also provides a method for determining the critical value of the tilt angle of the landslide alarm sensor:

[0035] The gravity of the insulating ball is much greater than the spring pressure and friction, so the critical tilt angle θ of the insulating plate c It is mainly related to the ball radius r and the groove length l. Figure 2 As shown in the figure, when the insulating plate is tilted, the gravity component of the insulating heavy ball along the rolling direction gradually increases. When it is equal to the component of the supporting force, the tilt angle reaches the critical value θ c :

[0036]

[0037] Where r is the radius of the insulating heavy ball, l is the width of the rectangular groove, and l<2r, and its depth d must satisfy:

[0038]

[0039] In addition, the critical value of the tilt angle θ can be reduced by increasing r or decreasing l. c , adjust the sensitivity of the sensor.

[0040] This application also provides a method for determining the alarm response time of the sensor:

[0041] The alarm response time of the landslide sensor in this application is the time it takes for the two copper contacts to contact after the insulating heavy ball rolls. The relationship between the insulating column, the spring sheet and its fixing screws and the movable copper contact in the sensor can be simplified as follows: Figure 3 In the triangle shown, when there is no insulating heavy ball, the distance L2 between the spring fixing screw and the copper contact can be expressed as:

[0042]

[0043]

[0044] Where h is the height of the insulating column, r+L1 is the distance between the insulating column and the spring fixing screw, and β is the angle between the spring sheet and the insulating plate.

[0045] When the insulating heavy ball separates the two copper contacts, the angle α between the spring sheet and the insulating plate is:

[0046]

[0047] When only the gravity of the spring sheet is considered, the time it takes for the two copper contacts to touch after the insulating heavy ball rolls down, that is, the alarm response time, is:

[0048]

[0049] In actual situations, the restoring force of the spring sheet must also be considered, and the alarm response time of the sensor will be smaller than t.

[0050] Embodiment 2

[0051] The embodiment of the present application provides a landslide alarm device, which has a simple structure and is powered by solar panels. The housing of the device is ellipsoidal to reduce possible damage to the housing during landslides, and includes:

[0052] Anti-interference module, the outside of the casing is painted with bright colors and some thin and long spikes are evenly inserted to prevent animal interference.

[0053] Built-in 4G communication module, send specific location information after the sensor alarm. Suitable for steep mountainous areas where large-scale fiber optic laying is not possible, and set up anti-interference module, the device will not be falsely reported due to animal interference, and the device is highly sensitive and will not miss reports in the event of landslides.

[0054] Due to its low cost, the device can be installed in batches in mountainous areas around mountain villages to increase the monitoring area. The device can send out sound and light alarm signals in time after a landslide occurs to remind the surrounding people to evacuate, and at the same time send out a signal with location information to notify personnel to take emergency measures.

[0055] The basic working principle of the landslide alarm device of the embodiment of the present application is as follows:

[0056] like Figure 4 As shown, the entire sensor device is placed horizontally on the hillside using a support rod, with the insulating heavy ball rolling down towards the mountain. When a landslide occurs, the soil or rocks around the support rod slide down and the device tilts. The insulating heavy ball of the sensor inside the device falls, the two copper contacts connect, the alarm circuit is turned on and emits an audible and visual alarm signal to notify nearby personnel to evacuate. The communication module sends the location information to the supervisor so that emergency measures can be taken. Specific working process:

[0057] 1) Use support rods to place the landslide alarm device horizontally on the hillside, and use a level meter to re-measure to ensure that the device is installed horizontally.

[0058] 2) Pull out the two baffles used to fix the insulating heavy ball. When the device is in working condition and there is no landslide in the mountain, the insulating heavy ball of the sensor is in the rectangular groove, as shown in the figure. Figure 2 As shown in a. At this time, the two copper sheets are separated by the insulating ball, and the alarm circuit is not conducting.

[0059] 3) When a landslide occurs, the device is tilted by falling rocks and loose soil, and the position of the insulating heavy ball in the sensor and the insulating plate is Figure 2 As shown in b.

[0060] 4) When the tilt angle exceeds the critical value, the insulating heavy ball rolls down, the two copper contacts connect, and the alarm circuit is turned on. The device sends out an audible and visual alarm signal to remind people to evacuate, and the communication module sends specific location information.

[0061] The advantages of the landslide alarm device of the embodiment of the present application are as follows:

[0062] 1) High sensitivity: The angle threshold of the sensor tilt can be reduced by increasing the radius of the insulating heavy ball and reducing the groove length.

[0063] 2) Short alarm response time: the insulating ball rolls off and the copper sheet is connected to immediately alarm.

[0064] 3) On-site and remote alarm: After the alarm circuit is turned on, the device immediately sends out sound and light alarm signals to remind surrounding personnel to evacuate; the communication module sends specific location information, which is conducive to further deployment of emergency measures.

[0065] 4) Low energy consumption: When there is no landslide, the device consumes very little power.

[0066] 5) Low cost: The landslide alarm device has a simple structure and does not require an external power supply, so it is easy to install in batches on the mountains around the village.

[0067] Those skilled in the art can understand that the above are only preferred examples of the invention and are not intended to limit the invention. Although the invention is described in detail with reference to the above examples, those skilled in the art can still modify the technical solutions recorded in the above examples or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, etc. made within the spirit and principle of the invention shall be included in the protection scope of the invention.

Claims

1. A landslide alarm sensor, characterized in that: include: A fixed metal contact is placed on the insulating column as a first conductor and connected to one pole of the alarm circuit; The movable metal contact is installed at the front end of the insulating spring sheet and serves as the second conductor to connect the other pole of the alarm circuit; An insulating heavy ball is placed on an insulating plate to deform the insulating spring sheet, separating the fixed metal contact and the movable metal contact, thereby disconnecting the alarm circuit; when the insulating heavy ball rolls down, the insulating spring sheet recovers its deformation, the fixed metal contact contacts the movable metal contact, and the alarm circuit is connected.

2. A landslide alarm sensor according to claim 1, characterized in that: It also includes an insulating plate, on which a limiting groove is provided for temporarily limiting the position of the insulating heavy ball.

3. A landslide alarm sensor according to claim 2, characterized in that: The critical tilt angle of the sensor that triggers the alarm is θ c for Where r is the radius of the insulating heavy ball, l is the width of the limiting groove, and l<2r is satisfied.

4. A landslide alarm sensor according to claim 3, characterized in that: The critical value of the tilt angle can be reduced by increasing r or decreasing l.

5. A landslide alarm sensor according to claim 1, characterized in that: The fixed metal contact and the movable metal contact are respectively provided with magnetism, and are used for ensuring that the fixed metal contact and the movable metal contact are in contact with each other when the insulating heavy ball rolls down.

6. The landslide alarm sensor according to any one of claims 1 to 4, characterized in that: The maximum response time of the alarm after the insulating heavy ball rolls, that is, the time when the two contacts are in contact when only the influence of gravity is considered, is: Wherein, α is the angle between the spring sheet and the insulating plate after the insulating heavy ball is placed; β is the angle between the spring sheet and the insulating plate after the insulating heavy ball rolls down and the spring sheet drops under gravity and contacts the fixed metal contact; h is the height of the insulating column, L1 is the projection distance of the line connecting the fixed point of the spring sheet on the insulating plate and the center of the ball on the insulating plate; L2 is the straight-line distance between the movable metal contact and the fixed point of the spring sheet on the insulating plate.

7. A landslide alarm sensor according to claim 1, characterized in that: A safety net bag is also provided under the insulating board. At the same time, the inner wall of the chassis where the landslide alarm sensor is located is made of sponge material to prevent the insulating heavy ball from rolling down and damaging the device casing.

8. The landslide alarm sensor according to claim 1, characterized in that: The power supply of the alarm circuit adopts solar panel.

9. A landslide alarm device, comprising the landslide alarm sensor according to any one of claims 1 to 8, characterized in that: Also includes: The device casing is ellipsoidal, which can reduce the possible damage to the casing during landslides; Anti-interference module, the outer shell is painted with bright colors, and multiple thin spikes are evenly inserted to prevent interference from animals; Communication module, sends specific location information after the sensor alarm.

10. The landslide alarm device according to claim 9, characterized in that: The landslide alarm device is placed horizontally on the hillside using support rods, with the insulating heavy ball rolling towards the mountain.

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