A laser signal-based road surface landslide collapse detection alarm device

Abstract

The application discloses a kind of road surface landslide collapse detection alarm device based on laser signal, including laser signal transmitting unit, light screen array and laser signal receiving and alarm unit, the light screen array includes a plurality of light screens with light hole in the center, the plurality of light screens are sequentially arranged on the road surface to be monitored and light hole is relatively aligned, so that the laser signal emitted by laser signal transmitting unit is sequentially received by laser signal receiving and alarm unit after passing through the light hole of each light screen when the road surface to be monitored does not occur landslide collapse, when the road surface to be monitored occurs landslide collapse, the laser signal emitted by laser signal transmitting unit is blocked by light screen to trigger laser signal receiving and alarm unit to send alarm signal.The application aims to provide a kind of road surface landslide collapse detection technology with simple and convenient construction installation, low cost, real-time monitoring, real-time alarm, high detection rate and strong anti-interference ability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of highway pavement landslide monitoring technology, and particularly relates to a pavement landslide detection and alarm device based on laser signals. BACKGROUND

[0002] Highway pavement safety monitoring is very important for ensuring highway traffic safety. Highway pavement landslide is prone to cause serious traffic accidents. At present, there are many technologies and devices for highway pavement safety monitoring, but they all have some shortcomings, such as high cost, complex installation, monitoring loopholes, and delayed warning. In order to improve highway pavement safety monitoring and ensure highway traffic safety, a detection and alarm technology with simple and convenient installation, low cost, real-time monitoring, real-time alarm, high detection rate, and strong anti-interference ability is still needed. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a pavement landslide detection and alarm device based on laser signals, which has simple and convenient installation, low cost, real-time monitoring, real-time alarm, high detection rate, and strong anti-interference ability.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0005] A pavement landslide detection and alarm device based on laser signals, comprising a laser signal emitting unit, a light shield array, and a laser signal receiving and alarm unit, the light shield array comprising a plurality of light shields with a light transmission hole in the center, the plurality of light shields being arranged in sequence on the monitored pavement with the light transmission holes aligned in pairs, so that when the monitored pavement does not have landslide, the laser signal emitted by the laser signal emitting unit passes through the light transmission holes of the light shields in sequence and is received by the laser signal receiving and alarm unit, and when the monitored pavement has landslide, the laser signal emitted by the laser signal emitting unit is blocked by the light shield to trigger the laser signal receiving and alarm unit to send an alarm signal.

[0006] Optionally, the light shield is composed of a light shield plate, a telescopic adjusting mechanism, and a base, the light shield plate being connected to the base through the telescopic adjusting mechanism, the light transmission hole being arranged at the center of the light shield plate, and a plurality of horizontal long-shaped fixing holes being arranged on the base for adjusting the left and right installation positions of the light shield and fixing the light shield to the ground through ground fixing screws.

[0007] Optionally, the telescopic adjusting mechanism comprises a supporting inner rod, a supporting outer rod and a fixing screw, the supporting inner rod is sleeved in the inner hollow supporting outer rod and can be lifted up and down for adjusting the height of the sun visor, the fixing screw penetrates the outer wall of the supporting outer rod and is threadedly connected with the supporting outer rod for fixing the position of the supporting inner rod on the supporting outer rod.

[0008] Optionally, some of the sun visors in the sun visor array are provided with wedge-shaped prisms at the light transmission holes for changing the transmission direction of the laser signal to adapt to the curve of the road between adjacent sun visors.

[0009] Optionally, the laser signal transmitting unit comprises an encoding circuit, a laser driving circuit, a semiconductor laser, a power supply and a power switch, the encoding circuit, the laser driving circuit and the semiconductor laser are sequentially connected for encoding the laser signal, the power supply ends of the encoding circuit, the laser driving circuit and the semiconductor laser are connected with the output end of the power supply through the power switch.

[0010] Optionally, the laser signal receiving and alarming unit comprises a signal sensing control unit, a control signal transmission line and an audible and light alarming and communication unit which are sequentially connected, the signal sensing control unit comprises a laser signal sensing receiving unit and a decoding and control circuit which are connected with each other, the decoding and control circuit is connected with the control signal transmission line and the audible and light alarming and communication unit, the laser signal sensing receiving unit is used for receiving the laser signal to generate an encoded electrical signal output to the connected decoding and control circuit, and the decoding and control circuit is used for detecting the matched encoded signal and outputting a control signal.

[0011] Optionally, a disconnectable line connector is arranged in the middle of the control signal transmission line in series, the line connector comprises a connector socket and a connector plug, the connector socket is provided with a socket elastic metal sheet, the connector plug is provided with a plug spherical metal head, the plug spherical metal head and the socket elastic metal sheet are respectively connected with the control signal transmission line, and the plug spherical metal head is inserted into and embedded in the elastic gap of the socket elastic metal sheet to keep electrical connection with the socket elastic metal sheet.

[0012] Optionally, the audible and light alarming and communication unit comprises a sound generating alarming unit, a light display alarming unit and a control unit, the sound generating alarming unit and the light display alarming unit are connected with the control unit respectively, and the control unit is used for controlling the sound generating alarming unit and the light display alarming unit to send or stop alarm signals.

[0013] Optionally, the audible and light alarming and communication unit further comprises a communication unit, the communication unit is connected with the control unit for sending alarm signals to a control center and receiving control signals, and the control unit is used for turning on or off the sound generating alarming unit and the light display alarming unit after receiving the control signals sent by the control center.

[0014] Optionally, the application also includes a first light control switch, a second light control switch and a third light control switch, the first light control switch is connected in series on the power supply line of the laser signal emitting unit for controlling the laser signal emitting unit to be closed in the daytime and opened at night to save energy, the second light control switch is connected in series on the power supply line of the signal sensing control unit for controlling the signal sensing control unit to be closed in the daytime and opened at night to save energy, and the third light control switch is connected in series on the power supply line of the sound-light alarm and communication unit for controlling the sound-light alarm and communication unit to be closed in the daytime and opened at night to save energy.

[0015] Compared with the prior art, the application mainly has the following advantages:

[0016] 1. The application includes a laser signal emitting unit, a light screen array with a central light hole, a signal sensing control unit, a control signal transmission line and a sound-light alarm and communication unit. When any light screen in the light screen array blocks the laser signal due to the position movement caused by the road surface landslide, the sound-light alarm and communication unit is triggered. The light screen in the light screen array has a simple structure and the number and position thereof can be adjusted according to the geological conditions, so that the overall device is simple and convenient to construct and install and has low cost.

[0017] 2. In the light screen array of the application, when any light screen blocks the laser signal due to the position movement caused by the road surface landslide, the sound-light alarm and communication unit is immediately triggered. The line connector with a breakable structure in the control signal transmission line is disconnected when the overall position of the laser signal emitting unit, the light screen array and the signal sensing control unit in the detection device is moved due to the large-area landslide, so that any light screen in the light screen array fails to block the laser signal, and the sound-light alarm and communication unit is also immediately triggered. The device can realize real-time monitoring and real-time alarm and has high detection rate.

[0018] 3. The application includes an encoding circuit and a decoding circuit. The laser signal emitted by the laser signal emitting unit adopts the encoding technology, so that the interference of external signals is effectively prevented and the device has strong anti-interference ability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the device in the first embodiment of the application.

[0020] Figure 2 It is a schematic diagram of the light screen structure in the first embodiment of the application.

[0021] Figure 3 It is a schematic diagram of the base structure of the light screen in the first embodiment of the application.

[0022] Figure 4 It is a schematic diagram of the structure of the line connector in the first embodiment of the application.

[0023] Figure 5 This is a schematic diagram of the sound and light alarm and communication unit in Embodiment 1 of the present invention.

[0024] Figure 6 This is a schematic diagram of the overall structure of the device in Embodiment 2 of the present invention.

[0025] Figure 7 This is a schematic diagram of the wedge-shaped prism structure at the light-transmitting hole in Embodiment 3 of the present invention.

[0026] Legend: 1. Laser signal transmitting unit; 11. Laser signal; 2. Shielding array; 21. Shielding screen; 211. Light-transmitting hole; 212. Shielding plate; 213. Telescopic adjustment mechanism; 2131. Inner supporting rod; 2132. Outer supporting rod; 2133. Fixing screw; 214. Base; 2141. Long strip-shaped fixing hole; 22. Wedge prism; 3. Laser signal receiving and alarm unit; 31. Signal sensing and control unit; 311. Laser signal sensing and receiving unit. Unit; 312, Decoding and Control Circuit; 32, Control Signal Transmission Line; 33, Audible and Visual Alarm and Communication Unit; 331, Audible Alarm Unit; 332, Visual Alarm Unit; 333, Control Unit; 334, Communication Unit; 34, Line Connector; 341, Connector Socket; 342, Connector Plug; 343, Socket Elastic Metal Sheet; 344, Plug Ball-Shaped Metal Head; 4, First Light Control Switch; 5, Second Light Control Switch; 6, Third Light Control Switch. Detailed Implementation

[0027] The embodiments of the present invention will now be described in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. In the description of the present invention, the use of terms such as "first," "second," etc., is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features. If directional descriptions are involved, such as "up," "down," etc., indicating directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, the above directional descriptions are only for the convenience of describing the present 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 limiting the present invention. Unless otherwise expressly limited, the terms "setting," "installation," "connection," etc., in the description of the present invention should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in the present invention in conjunction with the specific content of the technical solution.

[0028] Embodiment one:

[0029] As Figure 1 shown, the embodiment provides a laser signal based road surface landslide collapse detection alarm device, which comprises a laser signal emitting unit 1, a light screen array 2 and a laser signal receiving and alarm unit 3. The light screen array 2 comprises a plurality of light screens 21 with a light transmission hole 211 in the center. The plurality of light screens 21 are arranged in sequence on the monitored road surface and the light transmission holes 211 are relatively aligned. When the monitored road surface does not collapse, the laser signal 11 emitted by the laser signal emitting unit 1 passes through the light transmission hole 211 of each light screen 21 in sequence and is received by the laser signal receiving and alarm unit 3. When the monitored road surface collapses, the laser signal 11 emitted by the laser signal emitting unit 1 is blocked by the light screen 21 to trigger the laser signal receiving and alarm unit 3 to send an alarm signal. In this embodiment, the laser signal emitting unit 1, the light screen array 2 and the signal sensing control unit 31 in the laser signal receiving and alarm unit 3 are placed in sequence at the place where the road surface is prone to collapse. Generally, in order to avoid affecting the function of the road surface, the laser signal emitting unit 1, the light screen array 2 and the laser signal receiving and alarm unit 3 can be installed on the surface of the curb on both sides of the road. Under normal circumstances when the road surface does not collapse, the laser signal 11 emitted by the laser signal emitting unit 1 is transmitted to the laser signal receiving and alarm unit 3 through the light transmission hole 211 of the light screen array 2, and the laser signal receiving and alarm unit 3 detects the signal normally and does not trigger the audible and light alarm. In dangerous situations when the road surface collapses, the laser signal receiving and alarm unit 3 triggers when it detects that any light screen 21 in the light screen array 2 is blocked by the laser signal 11 due to the position shift caused by the road surface collapse. The device has the advantages of simple and convenient construction and installation, low cost, real-time monitoring, real-time alarm, high detection rate and strong anti-interference ability.

[0030] In order to ensure the normal work of the laser signal emitting unit 1 and realize the controllable working state of the laser signal emitting unit 1 and the coding of the emitted laser signal, the laser signal emitting unit 1 in this embodiment comprises a coding circuit, a laser driving circuit, a semiconductor laser, a power supply and a power switch. The coding circuit, the laser driving circuit and the semiconductor laser are connected in sequence to code the laser signal 11. The power supply end of the coding circuit, the laser driving circuit and the semiconductor laser is connected to the output end of the power supply through the power switch. When the power switch is closed, the laser signal emitting unit 1 enters the working state, and the laser driving and coding circuit makes the semiconductor laser emit the coded laser signal 11. In this embodiment, the laser signal emitting unit 1 is fixed to the ground by a fixing device.

[0031] As Figure 2 and Figure 3As shown, the light-shielding screen 21 in this embodiment consists of a light-shielding plate 212, a telescopic adjustment mechanism 213, and a base 214. The light-shielding plate 212 is connected to the base 214 via the telescopic adjustment mechanism 213. The light-transmitting hole 211 is located at the center of the light-shielding plate 212. The base 214 has multiple horizontal elongated fixing holes 2141 for adjusting the left and right installation positions of the light-shielding screen 21. The light-shielding screen 21 is fixed to the ground using ground fixing screws. The laser signal emitting unit 1 and the laser signal receiving and alarm unit 3 are adjusted to maintain a suitable height and ensure that the laser signal 11 is horizontal. The telescopic adjustment mechanism 213 is adjusted in its extension stroke, and the base 214 is moved via the elongated fixing holes 2141 to adjust the left and right positions of the light-shielding screen 21, ensuring that the laser signal 11 passes smoothly through the light-transmitting holes 211 at the center of all the light-shielding screens 21 without obstruction.

[0032] like Figure 2 As shown, the telescopic adjustment mechanism 213 in this embodiment includes an inner support rod 2131, an outer support rod 2132, and a fixing screw 2133. The inner support rod 2131 is fitted inside the hollow outer support rod 2132 and can be raised and lowered to adjust the height of the light shield 212. The fixing screw 2133 passes through the outer wall of the outer support rod 2132 and is threadedly connected to the outer support rod 2132 to fix the position of the inner support rod 2131 on the outer support rod 2132. Adjusting the vertical position of the inner support rod 2131 within the outer support rod 2132 and adjusting the horizontal position of the light shield 21 by moving the base 214 through the elongated fixing hole 2141 ensures that the laser signal 11 passes smoothly through the light-transmitting holes 211 at the center of all the light shields 21. The fixing screw 2133 fixes the position of the inner support rod 2131 within the outer support rod 2132, and the elongated fixing hole 2141 fixes the light shield 21 to the ground.

[0033] like Figure 1 As shown, the laser signal receiving and alarm unit 3 includes a signal sensing control unit 31, a control signal transmission line 32, and an audible and visual alarm and communication unit 33 connected in sequence. The signal sensing control unit 31 includes a laser signal sensing receiving unit 311 and a decoding and control circuit 312 connected to each other. The decoding and control circuit 312 is connected to the audible and visual alarm and communication unit 33 through the control signal transmission line 32. The laser signal sensing receiving unit 311 receives the laser signal 11 to generate an encoded electrical signal, which is output to the connected decoding and control circuit 312. The decoding and control circuit 312 detects the matching encoded signal and outputs a control signal. In this embodiment, the signal sensing control unit 31 is fixed to the ground by a fixing device. The signal sensing control unit 31 is separate from the audible and visual alarm and communication unit 33, but connected through the control signal transmission line 32. The control unit 333 and the communication unit 334 in the audible and visual alarm and communication unit 33 are fixed in a safe location where landslides and collapses are not likely.

[0034] likeFigure 4 As shown, the disconnectable line connector 34 is arranged in series in the middle of the control signal transmission line 32, the line connector 34 includes a connector socket 341 and a connector plug 342, the connector socket 341 is provided with a socket elastic metal sheet 343, the connector plug 342 is provided with a plug spherical metal head 344, the plug spherical metal head 344 and the socket elastic metal sheet 343 are respectively electrically connected with the control signal transmission line 32, and the plug spherical metal head 344 is inserted into and embedded in the elastic gap of the socket elastic metal sheet 343 to keep electrical connection with the socket elastic metal sheet 343. Through the above structure, on the one hand, the installation and connection of the control signal transmission line 32 can be facilitated, and on the other hand, the control signal transmission line 32 itself can also detect the road surface landslide, the pulling force generated by the road surface landslide will cause the plug spherical metal head 344 and the socket elastic metal sheet 343 to be separated, so that the control signal transmission line 32 is disconnected and the laser signal receiving and alarm unit 3 will also trigger an alarm signal. When a large-area landslide occurs, the positions of the signal sensing control unit 31 and other parts in the detection device, such as the laser signal emitting unit 1, the light screen array 2 and the laser signal receiving and alarm unit 3, are moved as a whole, so that any light screen 21 in the light screen array 2 may fail to block the laser signal 11, resulting in that the audible and light alarm and communication unit 33 cannot be triggered. Since the control unit 333 and the communication unit 334 connected with the audible and light alarm and communication unit 33 through the control signal transmission line 32 are fixedly arranged at a safe place where the road surface landslide is less likely to occur, the plug spherical metal head 344 and the socket elastic metal sheet 343 are disconnected under the action of external pulling force, so as to trigger the audible and light alarm and communication unit 33, thereby ensuring the high detection rate and accuracy of the road surface landslide.

[0035] As Figure 5As shown, the sound and light alarm and communication unit 33 comprises a sound alarm unit 331, a light display alarm unit 332 and a control unit 333, the sound alarm unit 331 and the light display alarm unit 332 are connected with the control unit 333 respectively, and the control unit 333 is used to control the sound alarm unit 331 and the light display alarm unit 332 to send or stop alarm signals. In the embodiment, the signal sensing control unit 31 is electrically connected with the sound and light alarm and communication unit 33 through the control signal transmission line 32, and the control unit 333 and the communication unit 334 in the sound and light alarm and communication unit 33 can be fixedly arranged at a safe place where the road slope collapse is not easy to occur. The light display alarm unit 332 comprises a stroboscopic warning light and a character warning display screen, and the sound alarm unit 331 and the light display alarm unit 332 are placed in front of the oncoming vehicle direction of the expressway more than 100 meters away to ensure that the vehicle driver has sufficient reaction time after receiving the sound, the stroboscopic light and the character warning, and the vehicle is parked in time to avoid accidents. After the sound and light alarm and communication unit 33 is triggered by being disconnected by the line connector 34 on the signal sensing control unit 31 or the control signal transmission line 32, the sound alarm unit 331 sends an alarm sound, the stroboscopic warning light of the light display alarm unit 332 is turned on to send a stroboscopic light, and the character warning display screen is turned on to display warning characters.

[0036] As shown, Figure 5 the sound and light alarm and communication unit 33 further comprises a communication unit 334, the communication unit 334 is connected with the control unit 333 to send alarm signals to the control center and receive control signals, and the control unit 333 is used to turn on or turn off the sound alarm unit 331 and the light display alarm unit 332 after the communication unit 334 receives the control signal sent by the control center. After the sound and light alarm and communication unit 33 is triggered by being disconnected by the line connector 34 on the signal sensing control unit 31 or the control signal transmission line 32, the communication unit 334 transmits alarm signals to the expressway control center. The communication unit 334 is used to detect the alarm device to transmit alarm signals to the expressway control center and receive the control signal transmitted by the expressway control center, and the control unit 333 is used to turn on or turn off the sound alarm unit 331 and the light display alarm unit 332 after the communication unit 334 receives the control signal transmitted by the expressway control center. After the sound and light alarm and communication unit 33 is triggered, the communication unit 334 transmits alarm signals to the expressway control center, and the expressway control center receives the alarm signals to take corresponding measures. When other emergency situations occur or combined with other information to determine that the detection alarm device is triggered by mistake, the expressway control center can transmit a control signal to the detection alarm device, and the communication unit 334 receives the control signal transmitted by the expressway control center to turn on or turn off the sound alarm unit 331 and the light display alarm unit 332 through the control unit 333.

[0037] In summary, the road surface landslide collapse detection and alarm device based on laser signals of the embodiment includes a laser signal emitting unit 1, a light shield array 2, and a laser signal receiving and alarm unit 3. The light shield array 2 includes a plurality of light shields 21 with a light transmission hole 211 at the center. The plurality of light shields 21 are arranged on the monitored road surface in sequence, and the light transmission holes 211 are aligned in pairs. When the monitored road surface does not collapse, the laser signal 11 emitted by the laser signal emitting unit 1 passes through the light transmission hole 211 of each light shield 21 in sequence and is received by the laser signal receiving and alarm unit 3. When the monitored road surface collapses, the laser signal 11 emitted by the laser signal emitting unit 1 is blocked by the light shield 21 to trigger the laser signal receiving and alarm unit 3 to send an alarm signal. The road surface landslide collapse detection and alarm device based on laser signals of the embodiment has the advantages of simple and convenient construction and installation, low cost, real-time monitoring, real-time alarm, high detection rate, and strong anti-interference capability. In addition, the road surface landslide collapse detection and alarm device based on laser signals of the embodiment can not only be used for road surface landslide collapse detection, but also can be installed at the top or bottom of a tunnel for tunnel collapse detection.

[0038] Embodiment Two

[0039] The main difference between the embodiment and Embodiment One is that, as shown in Figure 6 the embodiment further includes a first light-controlled switch 4, a second light-controlled switch 5, and a third light-controlled switch 6. The first light-controlled switch 4 is connected in series on the power supply line of the laser signal emitting unit 1 to control the laser signal emitting unit 1 to be turned off during the day and turned on at night to save energy. The second light-controlled switch 5 is connected in series on the power supply line of the signal sensing control unit 31 to control the signal sensing control unit 31 to be turned off during the day and turned on at night to save energy. The third light-controlled switch 6 is connected in series on the power supply line of the sound-light alarm and communication unit 33 to control the sound-light alarm and communication unit 33 to be turned off during the day and turned on at night to save energy.

[0040] Embodiment Three

[0041] The main difference between the embodiment and Embodiment One is that, as shown in Figure 7As shown, the part of the light screen array 2 in the embodiment is provided with a wedge-shaped prism 22 at the light transmission hole 211 for changing the transmission direction of the laser signal 11 to adapt to the curve of the road between adjacent light screens 21. The transmission direction of the laser signal 11 can be changed through the wedge-shaped prism 22, thereby ensuring the normal use of the detection alarm device at the curve of the highway. If the curve is long, multiple wedge-shaped prisms 22 can be used to change the transmission direction of the laser signal 11 multiple times. The embodiment also provides an installation method applied to the curve of the highway, which comprises detecting and generating a shape curve at the curve of the highway, then setting an installation point for installing the light screen 21 on the shape curve, calculating the deflection angle of adjacent installation points, and thereby selecting a corresponding wedge-shaped prism 22 for each installation point of the light screen 21 according to the deflection angle.

[0042] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A laser signal-based road surface landslide collapse detection alarm device, characterized by, The application relates to a laser signal transmitting unit (1), a light screen array (2) and a laser signal receiving and alarming unit (3), wherein the light screen array (2) comprises a plurality of light screens (21) provided with light passing holes (211) in the center, the plurality of light screens (21) are arranged on a monitored road surface in sequence and the light passing holes (211) are relatively aligned, so that the laser signal (11) emitted by the laser signal transmitting unit (1) is received by the laser signal receiving and alarming unit (3) after sequentially passing through the light passing holes (211) of the light screens (21) when no landslide and collapse occur on the monitored road surface, and the laser signal (11) emitted by the laser signal transmitting unit (1) is blocked by the light screen (21) to trigger the laser signal receiving and alarming unit (3) to send an alarm signal when landslide and collapse occur on the monitored road surface. The laser signal transmitting unit (1) comprises an encoding circuit, a laser driving circuit, a semiconductor laser, a power supply and a power switch, the encoding circuit, the laser driving circuit and the semiconductor laser are sequentially connected for encoding the laser signal (11), and the power supply ends of the encoding circuit, the laser driving circuit and the semiconductor laser are connected with the output end of the power supply through the power switch. The laser signal receiving and alarming unit (3) comprises a signal sensing control unit (31), a control signal transmission line (32) and an acousto-optic alarming and communication unit (33) which are sequentially connected, the signal sensing control unit (31) comprises a laser signal sensing receiving unit (311) and a decoding and control circuit (312) which are connected with each other, the decoding and control circuit (312) is connected with the acousto-optic alarming and communication unit (33) through the control signal transmission line (32), the laser signal sensing receiving unit (311) is used for receiving the laser signal (11) to generate an encoded electrical signal output to the connected decoding and control circuit (312), and the decoding and control circuit (312) is used for detecting the matched encoded signal and outputting a control signal. A disconnectable line connector (34) is arranged in the middle of the control signal transmission line (32), the line connector (34) comprises a connector socket (341) and a connector plug (342), the connector socket (341) is provided with a socket elastic metal sheet (343), the connector plug (342) is provided with a plug spherical metal head (344), the plug spherical metal head (344) and the socket elastic metal sheet (343) are respectively connected with the control signal transmission line (32), and the plug spherical metal head (344) is inserted into and embedded in the elastic gap of the socket elastic metal sheet (343) to keep electrical connection with the socket elastic metal sheet (343).

2. The laser signal based road surface slump detection warning device according to claim 1, wherein, The light shield (21) is composed of a light shield plate (212), a telescopic adjusting mechanism (213) and a base (214), the light shield plate (212) is connected with the telescopic adjusting mechanism (213) and the base (214), the light transmission hole (211) is arranged at the center of the light shield plate (212), and a plurality of transverse long strip fixing holes (2141) are arranged on the base (214) for adjusting the left and right installation positions of the light shield (21) and fixing the light shield (21) to the ground through ground fixing screws.

3. The laser signal based road surface slump detection warning device according to claim 2, wherein, The telescopic adjusting mechanism (213) comprises a supporting inner rod (2131), a supporting outer rod (2132) and a fixing screw (2133), the supporting inner rod (2131) is sleeved in the hollow supporting outer rod (2132) and can be lifted up and down for adjusting the height of the light shield plate (212), and the fixing screw (2133) penetrates the outer wall of the supporting outer rod (2132) and is threadedly connected with the supporting outer rod (2132) for fixing the position of the supporting inner rod (2131) on the supporting outer rod (2132).

4. The laser signal based road surface slump detection warning device according to claim 2, wherein, Part of the light shields (21) in the light shield array (2) are provided with wedge-shaped prisms (22) at the light transmission holes (211) for changing the transmission direction of the laser signal (11) to adapt to the curve of the road between adjacent light shields (21).

5. The laser signal based road surface slump detection warning device according to claim 1, wherein, The sound and light alarm and communication unit (33) comprises a sound alarm unit (331), a light display alarm unit (332) and a control unit (333), the sound alarm unit (331) and the light display alarm unit (332) are connected with the control unit (333) respectively, and the control unit (333) is used for controlling the sound alarm unit (331) and the light display alarm unit (332) to send or stop alarm signals.

6. The laser signal based road surface slump detection warning device according to claim 5, wherein, The sound and light alarm and communication unit (33) further comprises a communication unit (334) connected with the control unit (333) for sending alarm signals to a control center and receiving control signals, and the control unit (333) is used for starting or stopping the sound alarm unit (331) and the light display alarm unit (332) after receiving the control signals sent by the control center.

7. The laser signal based road surface slump detection and warning device as claimed in claim 5, wherein, The first light control switch (4), the second light control switch (5) and the third light control switch (6) are further included, the first light control switch (4) is connected in series on the power supply circuit of the laser signal emitting unit (1) for controlling the laser signal emitting unit (1) to be turned off in the daytime and turned on at night to save energy, the second light control switch (5) is connected in series on the power supply circuit of the signal sensing control unit (31) for controlling the signal sensing control unit (31) to be turned off in the daytime and turned on at night to save energy, and the third light control switch (6) is connected in series on the power supply circuit of the sound and light alarm and communication unit (33) for controlling the sound and light alarm and communication unit (33) to be turned off in the daytime and turned on at night to save energy.

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