Slope multi-dimensional real-time monitoring and early warning device

Abstract

The invention provides a slope multi-dimensional real-time monitoring and early warning device, belongs to the technical field of slope monitoring and early warning, and solves the problems that existing slope monitoring equipment is limited in monitoring range and insufficient in flexibility, and existing early warning systems are poor in accuracy and reliability, the slope multi-dimensional real-time monitoring and early warning device comprises a mounting base, and mounting bolts are fixedly connected to the four corners of the ground end of the mounting base; a stand column is fixedly connected to the middle of the upper end of the mounting base, a monitoring equipment mechanism is fixedly connected to the upper end of the stand column, and an early warning equipment mechanism is fixedly connected to the right end of the monitoring equipment mechanism.

Description

Technical Field

[0001] This invention belongs to the field of slope monitoring and early warning technology, and more specifically, relates to a multi-dimensional real-time monitoring and early warning device for slopes. Background Technology

[0002] As a common geological structure in engineering construction, slopes are subject to long-term effects from rainwater erosion, geological activity, vegetation destruction, and other factors, making them prone to landslides, collapses, and other disasters, posing a serious threat to the safety of surrounding facilities and personnel. Traditional slope monitoring relies on manual inspections or fixed sensors, which suffers from problems such as low monitoring frequency and limited coverage. With the development of technology, automated monitoring equipment has been gradually applied, but it still faces challenges such as unstable power supply in the field, blind spots caused by fixed monitoring angles, and delayed response of early warning systems. Especially in complex terrain, single-dimensional monitoring is difficult to capture subtle changes in slopes, and the single triggering condition of the early warning mechanism is prone to false alarms or missed alarms, making it difficult to meet the needs of accurate disaster prevention.

[0003] Problems with existing technologies: First, existing equipment is mostly fixed and can only monitor specific angles. There are many blind spots in the monitoring of complex slopes, and it is difficult to adjust the monitoring direction according to the dynamic slope. Second, existing early warning systems mostly rely on a single sensor (such as a displacement sensor), which is easily affected by environmental interference and will lead to false alarms. Moreover, the triggering mechanism is simple and cannot cope with the complex signals of slope instability.

[0004] Therefore, in view of this, we will study and improve the existing structure and its deficiencies, and provide a multi-dimensional real-time monitoring and early warning device for slopes, in order to achieve a more practical value. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a multi-dimensional real-time monitoring and early warning device for slopes, which solves the problems of limited monitoring range and insufficient flexibility of existing slope monitoring equipment, as well as the poor accuracy and reliability of existing early warning systems.

[0006] The purpose and effectiveness of the multi-dimensional real-time monitoring and early warning device for slopes of this invention are achieved by the following specific technical means:

[0007] A multi-dimensional real-time monitoring and early warning device for slopes includes a mounting base. Mounting bolts are fixedly connected to the four corners of the base's ground surface. A column is fixedly connected to the upper center of the base, and a monitoring equipment mechanism is fixedly connected to the upper end of the column. An early warning equipment mechanism is fixedly connected to the right end of the monitoring equipment mechanism. The monitoring equipment mechanism includes an outer casing. A power distribution box is fixedly connected to the front end of the casing. Support rods are fixedly connected to the four corners of the upper surface of the casing. A first conical cover is fixedly connected to the upper ends of the four support rods. The front and rear sides of the top of the first conical cover are fixedly... The outer casing is fixedly connected to a fixed base, and a solar photovoltaic panel is fixedly connected to the other end of each of the two fixed bases. An L-shaped block is fixedly connected to the lower part of the left wall and the middle part of the right wall of the outer casing. A connecting base is fixedly connected to the left and right parts of the lower wall of the outer casing. A first drive motor is fixedly connected to the surface of the connecting base on the left rear side. A first turbine rod is fixedly connected to the output end of the first drive motor, and the other end of the first turbine rod is movably connected to the L-shaped block on the right rear side through a bearing. An adjustment component is meshed with the outer surface of the first turbine rod. The outer casing is fixedly connected to the upper end of the column.

[0008] Furthermore, the adjustment assembly includes a second drive motor, the output end of which is fixedly connected to a second turbine rod. The other end of the second turbine rod is movably connected to an L-shaped block on the left front side via a bearing. A lower gear is meshed with the outer surface of the second turbine rod. A vertical rotating rod is fixedly connected to the upper middle part of the lower gear. A sleeve is fitted onto the outer surface of the vertical rotating rod. An upper gear is fixedly connected to the lower end of the sleeve. A main bevel gear is fixedly connected to the upper end of the sleeve. A connecting plate is fixedly connected to the upper part of the outer surface of the sleeve. A horizontal rotating rod is movably connected to the left and right ends of the connecting plate via bearings. A side bevel gear is fixedly connected to the left part of the outer surface of the horizontal rotating rod. A sleeve block is fixedly connected to the middle part of the outer surface of the horizontal rotating rod. A fixing rod is fixedly connected to the upper end of the sleeve block. A second conical cover is fixedly connected to the lower part of the outer surface of the fixing rod. The main body of the monitoring device is fixedly connected to the upper end of the fixing rod. The second drive motor is fixedly connected to the connecting seat on the right front side.

[0009] Furthermore, the warning device mechanism includes a side box. A movable groove is formed in the middle of the upper wall of the side box. A slider is slidably connected in the movable groove. A connecting rope is fixedly connected to the lower middle of the slider. A ball is fixedly connected to the other end of the connecting rope. An outer circular cover and a pressure sensor are fixedly connected to the middle of the lower wall of the side box, with the outer circular cover located outside the pressure sensor. Multiple contact modules are fixedly connected around the inner wall of the outer circular cover. A controller is fixedly connected to the right side of the outer circular cover. A buzzer is fixedly connected to the front end of the controller. An alarm light is fixedly connected to the middle of the upper end of the side box. The side box is fixedly connected to the right end of the outer casing.

[0010] Furthermore, the lower end of the vertical rotating rod is movably connected to the middle of the lower wall of the outer casing via a bearing, the upper gear is meshed with the front of the outer surface of the first turbine rod, the connecting plate is located at the top of the outer casing and does not contact the end face of the outer casing, and the size of the second conical cover is smaller than the size of the first conical cover.

[0011] Furthermore, the multiple contact modules are distributed in a ring at equal intervals around the outer cover, and the spherical block has a solid spherical structure and is located on the upper surface of the pressure sensor.

[0012] Furthermore, the solar photovoltaic panels are arranged symmetrically and tilted at an angle of 30°. The solar photovoltaic panels are connected to the internal battery of the distribution box via wires, and the output lines of the distribution box are respectively connected to the first drive motor, the second drive motor, and the main body of the monitoring equipment.

[0013] Furthermore, the contact module consists of a ring array of 8 sets of copper springs, with a spacing of 40° between each set of springs. The pressure sensor is connected to the input terminal of the controller via a signal line, and the output terminal of the controller is connected to a buzzer and a warning light, respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] I. In this invention, the main body of the monitoring equipment can be rotated in multiple dimensions by using dual drive motors in conjunction with a worm gear and bevel gear structure. The first drive motor drives the sleeve to rotate horizontally, and the second drive motor achieves the adjustment of the pitch angle of the monitoring equipment through bevel gear transmission. This breaks through the limitations of the traditional fixed monitoring mode, can cover the entire slope range, eliminate monitoring blind spots, flexibly adapt to the monitoring needs of complex terrain, and comprehensively capture subtle changes in the slope.

[0016] Second, in this invention, the early warning mechanism adopts a combination design of a ball block, a pressure sensor and a ring-shaped distributed contact module. When the ball block is deflected by force, it can trigger the pressure signal of the pressure sensor and also contact the contact module in different directions to generate an electrical signal. The controller judges the slope anomaly through multi-parameter comprehensive analysis, avoiding false alarms or missed alarms caused by a single signal trigger. At the same time, the sound and light early warning is activated simultaneously to ensure timely and reliable early warning, and to buy time for disaster response. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the multi-dimensional real-time monitoring and early warning device for slopes according to the present invention.

[0018] Figure 2 This is a schematic diagram of the combined connection structure of the monitoring equipment mechanism and the early warning equipment mechanism of the multi-dimensional real-time monitoring and early warning device for slopes of the present invention.

[0019] Figure 3 This is a schematic diagram of the adjustment component and the locally enlarged combined connection structure of the slope multi-dimensional real-time monitoring and early warning device of the present invention.

[0020] Figure 4 This is a schematic diagram of the combined connection structure of the adjustment component and the early warning equipment mechanism of the slope multi-dimensional real-time monitoring and early warning device of the present invention.

[0021] Figure 5 This is a detailed enlarged structural diagram of point A of the multi-dimensional real-time monitoring and early warning device for slopes according to the present invention.

[0022] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0023] Mounting base 1; Mounting bolt 2; Column 3; Monitoring equipment mechanism 4; Early warning equipment mechanism 5; Distribution box 41; Outer casing 42; Support rod 43; First conical cover 44; Fixed seat 45; Solar photovoltaic panel 46; Adjustment component 47; L-shaped block 48; Connecting seat 49; First drive motor 410; First turbine rod 411; Second drive motor 471; Second turbine rod 472; Lower gear 473; Vertical rotating rod 474; Upper gear 475; Sleeve 476; Connecting plate 477; Main bevel gear 478; Horizontal rotating rod 479; Side bevel gear 4710; Sleeve block 4711; Second conical cover 4712; Monitoring equipment body 4713; Fixed rod 4714; Side box 51; Movable groove 52; Slider 53; Connecting rope 54; Outer circular cover 55; Controller 56; Buzzer 57; Warning light 58; Pressure sensor 59; Contact module 510; Ball block 511. Detailed Implementation

[0024] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0025] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Example:

[0028] As attached Figure 1 To be continued Figure 5 As shown:

[0029] This invention provides a multi-dimensional real-time monitoring and early warning device for slopes, including a mounting base 1. Mounting bolts 2 are fixedly connected to the four corners of the upper part of the mounting base 1. A column 3 is fixedly connected to the middle of the upper part of the mounting base 1. A monitoring equipment mechanism 4 is fixedly connected to the upper end of the column 3. An early warning equipment mechanism 5 is fixedly connected to the right end of the monitoring equipment mechanism 4. The monitoring equipment mechanism 4 includes an outer casing 42. A power distribution box 41 is fixedly connected to the front end of the outer casing 42. Support rods 43 are fixedly connected to the four corners of the upper part of the outer casing 42. A first conical cover 44 is fixedly connected to the upper ends of the four support rods 43. A fixing seat 45 is fixedly connected to the front and rear sides of the top of the first conical cover 44. A solar photovoltaic panel 46 is fixedly connected to the other end of each of the two fixing seats 45. L-shaped blocks 48 are fixedly connected to the lower part of the left box wall and the middle part of the right box wall of the outer box 42. Connecting seats 49 are fixedly connected to the left and right parts of the lower box wall of the outer box 42. A first drive motor 410 is fixedly connected to the surface of the connecting seat 49 on the left rear side. A first turbine rod 411 is fixedly connected to the output end of the first drive motor 410, and the other end of the first turbine rod 411 is movably connected to the L-shaped block 48 on the right rear side through a bearing. An adjusting assembly 47 is meshed with the outer surface of the first turbine rod 411. The outer box 42 is fixedly connected to the upper end of the column 3. The adjusting assembly 47 includes a second drive motor 471. A second turbine rod 472 is fixedly connected to the output end of the second drive motor 471. The other end of the second turbine rod 472 is connected to the L-shaped block 48 on the left front side through a bearing. The L-shaped block 48 is movably connected. The outer surface of the second turbine rod 472 is meshed with a lower gear 473. A vertical rotating rod 474 is fixedly connected to the middle of the upper end of the lower gear 473. A sleeve 476 is sleeved on the outer surface of the vertical rotating rod 474. An upper gear 475 is fixedly connected to the lower end of the sleeve 476. A main bevel gear 478 is fixedly connected to the upper end of the sleeve 476. A connecting plate 477 is fixedly connected to the upper part of the outer surface of the sleeve 476. A horizontal rotating rod 479 is movably connected to the left and right ends of the connecting plate 477 via bearings. A side bevel gear 4710 is fixedly connected to the left part of the outer surface of the horizontal rotating rod 479. A sleeve block 4711 is fixedly connected to the middle of the outer surface of the horizontal rotating rod 479. A fixing rod 4714 is fixedly connected to the upper end of the sleeve block 4711. A second conical cover 4712 is fixedly connected to the lower part of the outer surface of the 714. The upper end of the fixed rod 4714 is fixedly connected to the main body of the monitoring equipment 4713. The second drive motor 471 is fixedly connected to the connecting seat 49 on the right front side. The early warning device mechanism 5 includes a side box 51. A movable groove 52 is opened in the middle of the upper box wall of the side box 51. A slider 53 is slidably connected in the movable groove 52. A connecting rope 54 is fixedly connected to the middle of the lower end of the slider 53. A ball block 511 is fixedly connected to the other end of the connecting rope 54. An outer circular cover 55 and a pressure sensor 59 are fixedly connected to the middle of the lower box wall of the side box 51. The outer circular cover 55 is located outside the pressure sensor 59. Multiple contact modules 510 are fixedly connected around the inner wall of the outer circular cover 55.A controller 56 is fixedly connected to the right side of the outer circular cover 55. A buzzer 57 is fixedly connected to the front end of the controller 56. A warning light 58 is fixedly connected to the upper center of the side box 51. The side box 51 is fixedly connected to the right end of the outer casing 42.

[0030] Using the above technical solution, the slope multi-dimensional real-time monitoring and early warning device is fixed by the mounting base 1 and mounting bolts 2. The column 3 supports the monitoring equipment mechanism 4 and the early warning equipment mechanism 5. The solar photovoltaic panel 46 converts light energy into electrical energy and stores it in the battery in the distribution box 41 to power the first drive motor 410, the second drive motor 471 and the main body of the monitoring equipment 4713. The first drive motor 410 drives the first turbine rod 411 to rotate, which drives the upper gear 475 of the adjusting component 47 to rotate the sleeve 476. The second drive motor 471 drives the second turbine rod 472 to drive the lower gear 473 to rotate the vertical rotating rod 474. The main bevel gear 478 meshes with the side bevel gear 47. 10. The horizontal rotating rod 479 drives the main body of the monitoring equipment 4713 to rotate in multiple dimensions to monitor the slope. When an anomaly is detected, the ball block 511 triggers the pressure sensor 59 and the contact module 510. The controller 56 controls the buzzer 57 and the warning light 58 to issue an early warning. By using a dual drive motor in combination with a worm gear and bevel gear structure, the main body of the monitoring equipment 4713 can rotate in multiple dimensions, improving the monitoring range and flexibility. The combination of the ball block 511, the pressure sensor 59 and multiple sets of contact modules 510 can achieve accurate and rapid early warning. The use of solar photovoltaic panels 46 for power supply is more energy-efficient and environmentally friendly. The first conical cover 44 and the second conical cover 4712 can effectively protect the equipment and extend its service life.

[0031] As a preferred embodiment, the lower end of the vertical rotating rod 474 is movably connected to the middle of the lower wall of the outer casing 42 via a bearing, the upper gear 475 is meshed with the front of the outer surface of the first turbine rod 411, the connecting plate 477 is located at the top of the outer casing 42 and does not contact the end face of the outer casing 42, and the size of the second conical cover 4712 is smaller than the size of the first conical cover 44.

[0032] In the above scheme, the vertical rotating rod 474 is connected by a bearing to reduce rotational friction and ensure smooth rotation. The meshing relationship between the upper gear 475 and the first turbine rod 411 ensures effective power transmission and realizes the rotational adjustment of the sleeve 476. The connecting plate 477 does not contact the outer casing 42 to avoid friction and interference during rotation. The second conical cover 4712 is smaller than the first conical cover 44, which does not affect the overall protection of the first conical cover 44, and can provide targeted protection for the main body of the monitoring equipment 4713.

[0033] As a preferred embodiment, multiple contact modules 510 are distributed in a ring at equal intervals around the outer cover 55, and the spherical block 511 has a solid spherical structure and is located on the upper surface of the pressure sensor 59.

[0034] In the above scheme, the ring-shaped equidistant distribution of the contact module 510 ensures that the ball block 511 can be triggered in a timely manner when it deviates in any direction, thus improving the comprehensiveness of the warning. The solid spherical structure of the ball block 511 makes it uniformly stressed. Located on the upper surface of the pressure sensor 59, it can accurately apply pressure in case of abnormality, ensuring that the pressure sensor 59 can effectively sense and improve the comprehensiveness and accuracy of the warning.

[0035] As a preferred embodiment, the solar photovoltaic panels 46 are arranged symmetrically and tilted at an angle of 30°. The solar photovoltaic panels 46 are connected to the internal battery of the distribution box 41 via wires, and the output lines of the distribution box 41 are respectively connected to the first drive motor 410, the second drive motor 471 and the main body of the monitoring equipment 4713.

[0036] In the above scheme, the solar photovoltaic panels 46 are arranged symmetrically at a 30° angle to maximize the reception of solar energy and improve the light energy conversion efficiency. They are connected to the battery in the distribution box 41 to realize energy storage and stable power supply, ensuring the continuous operation of each motor and monitoring equipment.

[0037] As a preferred embodiment, the contact module 510 consists of a ring array of 8 sets of copper springs, with a spacing of 40° between each set of springs. The pressure sensor 59 is connected to the input terminal of the controller 56 via a signal line, and the output terminal of the controller 56 is connected to the buzzer 57 and the warning light 58, respectively.

[0038] In the above scheme, the setting of 8 sets of copper spring ring array with a spacing of 40° makes the early warning trigger more sensitive and accurate, with comprehensive coverage. The connection between pressure sensor 59 and controller 56, buzzer 57 and warning light 58 realizes the transmission of abnormal signals and timely audible and visual early warning.

[0039] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A multi-dimensional real-time monitoring and early warning device for slopes, characterized in that: include Mounting base (1), with mounting bolts (2) fixedly connected to the four corners of the ground end of the mounting base (1), a column (3) fixedly connected to the middle of the upper end of the mounting base (1), a monitoring equipment mechanism (4) fixedly connected to the upper end of the column (3), and an early warning equipment mechanism (5) fixedly connected to the right end of the monitoring equipment mechanism (4). The monitoring equipment mechanism (4) includes an outer casing (42). A power distribution box (41) is fixedly connected to the front end of the outer casing (42). Support rods (43) are fixedly connected to the four corners of the upper end of the outer casing (42). A first conical cover (44) is fixedly connected to the upper end of the four support rods (43). Fixing seats (45) are fixedly connected to the front and rear sides of the top of the first conical cover (44). Solar photovoltaic panels (46) are fixedly connected to the other ends of the two fixing seats (45). The lower part of the left wall and the middle part of the right wall of the outer casing (42) are fixedly connected to... There is an L-shaped block (48). The left and right sides of the lower box wall of the outer casing (42) are fixedly connected to a connecting seat (49). The surface of the connecting seat (49) on the left rear side is fixedly connected to a first drive motor (410). The output end of the first drive motor (410) is fixedly connected to a first turbine rod (411). The other end of the first turbine rod (411) is movably connected to the L-shaped block (48) on the right rear side through a bearing. The outer surface of the first turbine rod (411) is meshed with an adjustment component (47). The outer casing (42) is fixedly connected to the upper end of the column (3).

2. The slope multi-dimensional real-time monitoring and early warning device as described in claim 1, characterized in that: The adjustment assembly (47) includes a second drive motor (471), the output end of which is fixedly connected to a second turbine rod (472). The other end of the second turbine rod (472) is movably connected to an L-shaped block (48) on the left front side via a bearing. A lower gear (473) is meshed with the outer surface of the second turbine rod (472). A vertical rotating rod (474) is fixedly connected to the middle of the upper end of the lower gear (473). A sleeve (476) is sleeved on the outer surface of the vertical rotating rod (474). An upper gear (475) is fixedly connected to the lower end of the sleeve (476). A main bevel gear (478) is fixedly connected to the upper end of the sleeve (476). The outer surface of the sleeve (476) is... A connecting plate (477) is fixedly connected to the upper part of the surface. The left and right ends of the connecting plate (477) are movably connected to a horizontal rotating rod (479) via bearings. A side bevel gear (4710) is fixedly connected to the left part of the outer surface of the horizontal rotating rod (479). A sleeve block (4711) is fixedly connected to the middle part of the outer surface of the horizontal rotating rod (479). A fixing rod (4714) is fixedly connected to the upper end of the sleeve block (4711). A second conical cover (4712) is fixedly connected to the lower part of the outer surface of the fixing rod (4714). The main body of the monitoring equipment (4713) is fixedly connected to the upper end of the fixing rod (4714). The second drive motor (471) is fixedly connected to the connecting seat (49) on the right front side.

3. The slope multi-dimensional real-time monitoring and early warning device as described in claim 1, characterized in that: The warning device mechanism (5) includes a side box (51). A movable groove (52) is provided in the middle of the upper box wall of the side box (51). A slider (53) is slidably connected in the movable groove (52). A connecting rope (54) is fixedly connected to the middle of the lower end of the slider (53). A ball block (511) is fixedly connected to the other end of the connecting rope (54). An outer circular cover (55) and a pressure sensor (59) are fixedly connected to the middle of the lower box wall of the side box (51). The outer circular cover (55) is located outside the pressure sensor (59). Multiple contact modules (510) are fixedly connected around the inner wall of the outer circular cover (55). A controller (56) is fixedly connected to the right side of the outer circular cover (55). A buzzer (57) is fixedly connected to the front end of the controller (56). A warning light (58) is fixedly connected to the middle of the upper end of the side box (51). The side box (51) is fixedly connected to the right end of the outer casing (42).

4. The slope multi-dimensional real-time monitoring and early warning device as described in claim 2, characterized in that: The lower end of the vertical rotating rod (474) is movably connected to the middle of the lower box wall of the outer casing (42) through a bearing. The upper gear (475) is meshed with the front of the outer surface of the first turbine rod (411). The connecting plate (477) is located at the top of the outer casing (42) and does not contact the end face of the outer casing (42). The size of the second conical cover (4712) is smaller than the size of the first conical cover (44).

5. The slope multi-dimensional real-time monitoring and early warning device as described in claim 3, characterized in that: Multiple contact modules (510) are distributed in a ring at equal intervals around the outer cover (55), and the ball block (511) has a solid spherical structure and is located on the upper surface of the pressure sensor (59).

6. The slope multi-dimensional real-time monitoring and early warning device as described in claim 1, characterized in that: The solar photovoltaic panel (46) is arranged symmetrically and tilted, and the tilt angle of the solar photovoltaic panel (46) is 30°. The solar photovoltaic panel (46) is connected to the battery inside the distribution box (41) through wires, and the output line of the distribution box (41) is connected to the first drive motor (410), the second drive motor (471) and the main body of the monitoring equipment (4713) respectively.

7. The slope multi-dimensional real-time monitoring and early warning device as described in claim 3, characterized in that: The contact module (510) consists of a ring array of 8 sets of copper springs, with a spacing of 40° between each set of springs. The pressure sensor (59) is connected to the input terminal of the controller (56) via a signal line. The output terminal of the controller (56) is connected to a buzzer (57) and a warning light (58).

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