Laser radar and video integrated monitoring device

Abstract

The utility model discloses a laser radar and video integrated monitoring device, which solves the problems of lower monitoring accuracy, slow heat dissipation speed and low efficiency of a track foreign matter invasion monitoring device in the prior art, and comprises a shell, a three-dimensional laser radar and a camera are arranged in the shell, the shell comprises a mounting bottom plate, and a camera is arranged on the mounting bottom plate. A front panel and a rain-proof shade are mounted on the mounting bottom plate, heat dissipation holes are formed in the mounting bottom plate and the rain-proof shade, the mounting bottom plate is connected with a support flat plate through a universal support, and the support flat plate is fixed on the circular tube cross arm through a U-shaped hoop. The camera is combined on the basis of the three-dimensional laser radar, so that the monitoring accuracy is high, and the false alarm rate is low; heat dissipation holes are formed in the top cover and the mounting bottom plate, so that the rainproof function is realized while the heat dissipation efficiency is improved; and a rotary bracket is arranged, so that up-down and left-right adjustment of the device can be realized, and the monitoring range is expanded.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of perimeter security monitoring of rail transit, and particularly relates to a laser radar and video integrated monitoring device. BACKGROUND

[0002] With the rapid development of economy, railway construction has entered a stage of rapid development. However, there are more and more potential safety hazards of railways, especially the safety accidents caused by natural disasters. Railway construction inevitably needs to pass through mountainous areas, plateaus and hilly areas, and the geological conditions of such areas are poor, and the probability of natural disasters is high, including foreign matter intrusion disasters that may seriously threaten the safety of railway operation. If the railway foreign matter intrusion disaster cannot be discovered in time, it may cause great harm and loss to the railway department.

[0003] The existing safety protection technologies, such as optical fiber sensing monitoring, electronic pulse protection net, infrared beam shooting system and video intelligent monitoring analysis, although each has its technical characteristics, but due to the limitation of technical principle, there are generally problems of incomplete detection coverage and poor response accuracy, that is, high false negative rate and false positive rate, which limits the effectiveness of these technologies in practical application, and it is difficult to meet the high standard requirements of rail transit safety prevention and control. For example, the common two-dimensional laser radar in the prior art mainly relies on two-dimensional laser radar to build a plane protection area. However, in actual situation, the protection area along the railway is not a simple plane structure, and the fluctuation of the terrain and the fixed facilities along the line make it difficult for this plane protection strategy to accurately cover all potential risk areas, and there is a high false negative rate. In addition, it is difficult for artificial to confirm the alarm data of a single laser radar, and the usability is low. Moreover, the monitoring device is usually a whole, and the heat generated by the operation of the radar is usually dissipated through natural circulation, and the heat dissipation speed is slow and the efficiency is low, and the high heat can easily shorten the service life of the radar, and the safety needs to be improved. SUMMARY

[0004] The purpose of the present application is to solve the problems of low monitoring accuracy, slow heat dissipation speed and low efficiency of the existing track foreign matter intrusion monitoring device, and to provide a laser radar and video integrated monitoring device. The device combines a camera with a three-dimensional laser radar, has high monitoring accuracy and low false positive rate. The device is provided with heat dissipation holes on the top cover and the mounting plate, which improves the heat dissipation efficiency and realizes the rain-proof function. The device is also provided with a universal support, which can adjust the device up and down and left and right, and expand the monitoring range.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] The utility model provides a laser radar video integrated monitoring device, is equipped with the heat dissipation hole on the top cap and the installation bottom plate, improves the heat dissipation efficiency and realizes the rain -proof function simultaneously, the universal support is fixed under the installation bottom plate, and the universal support is opened and is adjusted the hole, can realize up and down and left and right adjustment.

[0007] The laser radar video integrated monitoring device has the heat dissipation hole on the top cap and the installation bottom plate, improves the heat dissipation efficiency, realizes the rain -proof function, fixes the universal support under the installation bottom plate, the universal support is opened and is adjusted the hole, can realize up and down and left and right adjustment.

[0008] As preferred, the three-dimensional laser radar is connected with a main control board card circuit, the camera is connected with the main control board card circuit, and the main control board card circuit is connected with a power supply board card circuit.

[0009] As preferred, the power supply board card circuit comprises a power supply noise suppression circuit, the power supply noise suppression circuit is connected with a protection circuit, and the protection circuit is connected with an isolation circuit.

[0010] As preferred, the main control board card is connected with an expansion board card circuit, the expansion board card circuit comprises a network switching circuit, the network switching circuit is connected with a network interface, and the network interface is connected with a coprocessor expansion interface.

[0011] As preferred, the main control board card circuit comprises a step-down circuit, the step-down circuit is connected with a core board, the core board is connected with an input level signal detection connection and an output level signal control circuit.

[0012] As preferred, the support flat plate is provided with a tooth and an adjustable U-shaped clamp fixing hole.

[0013] As preferred, the universal support is provided with an adjusting hole.

[0014] As preferred, the front panel is provided with a window, and the window is opposite the camera lens and the three-dimensional laser radar.

[0015] As preferred, the window is provided with waterproof glass, and the waterproof glass is provided with a waterproof sealing ring at the connection with the window.

[0016] As preferred, the camera is a red exposure-free camera.

[0017] Therefore, the present application has the following beneficial effects:

[0018] 1. Based on 3D LiDAR and combined with a camera, the monitoring capability is not affected by light or inclement weather, and it is suitable for most outdoor environments. It can work normally even in strong light or at night, and is less affected by inclement weather. It can operate stably for a long time in all weather conditions. In addition, heat dissipation holes are provided on the rain cover and the mounting base plate of the device to improve heat dissipation efficiency and achieve rain protection.

[0019] 2. Install a universal bracket fixed under the base plate. The universal bracket has adjustment holes, which can be adjusted up and down and left and right, so as to have a wider monitoring range and stronger adaptability.

[0020] 3. The universal bracket is fixed to the bracket plate with screws. The bracket plate is designed with locking teeth and U-shaped clamp fixing holes with adjustable size to accommodate U-shaped clamps of different sizes. Combined with the U-shaped clamps, it is fixed to the round tube cross arm bracket, which is easy to install and easy to disassemble. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the integrated lidar and video monitoring device in Example 1.

[0022] Figure 2 This is an exploded view of the integrated lidar and video monitoring device in Example 1.

[0023] Figure 3 This is a circuit diagram of the EMI power supply noise suppression circuit in Example 1.

[0024] Figure 4 This is a circuit diagram of the protection circuit in Example 1.

[0025] Figure 5 This is a circuit diagram of the 12V power supply circuit of the main control board in Example 1.

[0026] Figure 6 This is a circuit diagram of the 12V power supply circuit of the expansion board in Example 1.

[0027] Figure 7 This is a circuit structure diagram of the RTC circuit in Example 1.

[0028] Figure 8 This is a circuit diagram of the watchdog circuit in Example 1.

[0029] Figure 9 This is a circuit diagram of the reset circuit in Example 1.

[0030] Figure 10 This is a circuit diagram for input level signal detection in Example 1.

[0031] Figure 11The circuit structure diagram of the output level signal control circuit in Example 1.

[0032] In the figure: 1, three-dimensional laser radar; 2, camera; 3, rainproof cover; 4, mounting base plate; 5, universal support; 6, support flat plate; 7, U-shaped clamp; 8, round pipe cross arm; 9, front panel; 10, window; 11, heat dissipation hole. DETAILED DESCRIPTION

[0033] The application will be further described in detail below in combination with the drawings and specific embodiments:

[0034] Example 1:

[0035] The embodiment provides a laser radar video integrated monitoring device, as shown in Figure 1 and Figure 2 , which comprises a three-dimensional laser radar 1, a camera 2, a rainproof cover 3, a front panel 9, a mounting base plate 4, a universal support 5, a support flat plate 6, a U-shaped clamp 7 and a round pipe cross arm 8, wherein the rainproof cover and the front panel are both mounted on the mounting base plate, and the rainproof cover is connected with the front panel to form a cavity, the three-dimensional laser radar and the camera are installed inside the cavity, the mounting base plate is installed on the universal support, the universal support is installed on the support flat plate, and the support flat plate is fixed on the round pipe cross arm through the U-shaped clamp.

[0036] Further, the rainproof cover and the mounting base plate are both provided with heat dissipation holes 11 for dissipating heat of the three-dimensional laser radar and the camera inside the cavity, so that the three-dimensional laser radar or the camera is prevented from being damaged due to overheating inside the cavity.

[0037] The front panel is provided with a window 10, and the window comprises a camera window and a laser radar window; the window is provided with waterproof glass, and the waterproof glass is fixed and installed on the window by using a waterproof sealing ring or waterproof glue; the waterproof glass can transmit a camera, a fill light and laser light.

[0038] The laser radar video integrated monitoring device provided in the embodiment has the mounting base plate as a reference, the three-dimensional laser radar is fixed on the mounting base plate through a screw, the camera is fixed on the mounting base plate through a screw, and the front panel is fixed on the mounting base plate through a connecting piece. The front panel is provided with a window, and the laser radar window, the camera lens and the fill light are exposed. The rainproof cover of the upper cover is fixed on the mounting base plate through a screw, so that the functions of heat dissipation and rainproof are realized. The universal support is fixed below the mounting base plate, the universal support is provided with an adjusting hole, and the universal support can be adjusted up and down and left and right. The universal support is fixed on the support flat plate through a screw, the support flat plate is designed with a clamping tooth and a U-shaped clamp fixing hole with an adjustable size, the support flat plate can be matched with U-shaped clamps of different sizes, and the support flat plate is fixed on the circular cross arm support in combination with the U-shaped clamps.

[0039] Further, the monitoring device further comprises a main control board circuit, a power supply board circuit and an extension board circuit, the power supply board circuit is connected with the main control board circuit and the extension board circuit respectively, and provides working power supply for the main control board circuit and the extension board circuit.

[0040] The power supply board circuit comprises an EMI power noise suppression circuit, an overvoltage, overcurrent and undervoltage protection circuit and a DCDC isolation circuit, the EMI power noise suppression circuit is connected with the overvoltage, overcurrent and undervoltage protection circuit, and the overvoltage, overcurrent and undervoltage protection circuit is connected with the DCDC isolation circuit.

[0041] Specifically, as shown in the figure, Figure 3 The EMI power noise suppression circuit adopts a filter U13 installed on a PCB, and a filter with a model number of DNF100-2x5A is adopted in the embodiment, so as to reduce power line conduction interference on the PCB, and the input end of the filter U13 is further connected with a resistor RV1 and a diode D8, and the output end of the filter U13 is connected with an anti-reverse connection circuit.

[0042] As shown in the figure, Figure 4 The overvoltage, overcurrent and undervoltage protection circuit comprises an anti-reverse connection circuit and an overvoltage and undervoltage circuit, wherein the EMI power noise suppression circuit is connected with the anti-reverse connection circuit, and the anti-reverse connection circuit is connected with the overvoltage and undervoltage circuit.

[0043] The anti-reverse connection circuit comprises a diode D56, a resistor R90, a capacitor C37, a resistor R91 and a field effect tube Q6, the G pole of the field effect tube is connected with one end of the resistor R91, the negative pole of the diode D56, one end of the resistor R90 and one end of the capacitor C37, the other end of the resistor R91 is connected with the positive output end of the filter U13 and the overvoltage and undervoltage circuit, the D pole of the field effect tube is connected with the negative output end of the filter U13, and the S pole of the field effect tube, the positive pole of the diode D56, the other end of the resistor R90 and the other end of the capacitor C37 are grounded.

[0044] The overvoltage and undervoltage circuit realizes overvoltage, undervoltage and overcurrent protection through an LM5069 chip U8, and the LM5069 chip U8 is further connected with resistors and capacitors. Specifically, the TIMER end of the LM5069 chip U8 is grounded through a capacitor C31, the G pole of a field effect tube Q1 is connected with the GATE end of the LM5069 chip U8, the D pole of the field effect tube Q1 is connected with one end of a resistor R1, one end of the resistor R1 is connected with one end of a resistor R81 and the SENSE end of the LM5069 chip U8, and the other end of the resistor R1 and the other end of the resistor R81 are connected with the VIN end of the LM5069 chip U8 and the anti-reverse connection circuit respectively.

[0045] The selection of capacitor C31 is related to the fault restart time. When a fault occurs (overcurrent or MOSFET overpower), the LM5069 chip U8 will charge capacitor C31 with a current of 85uA. When it is charged to 4V, it is still in a fault state. The field-effect transistor Q1 will be pulled low, and capacitor C4 will discharge with a current of 2.5uA. This process is repeated 8 times to start the next restart. According to the formula C*U=I*T, the single charging time is 3.24ms, the single discharging time is 110ms, and the next restart time is 905.9ms.

[0046] The DC-DC isolation circuit includes the 12V power supply circuit of the main control board and the 12V power supply circuit of the expansion board, such as Figure 5 and Figure 6 As shown ( Figure 5 This is the 12V power supply circuit for the main control board. Figure 6 The 12V power supply circuits for both the expansion board and the main control board are isolated by URB2412LD power modules (power module U1 and power module U14). After power output, they are connected to the main control board and expansion board via connectors.

[0047] Furthermore, the main control board circuit includes a main control processor and main control gigabit network interface circuit 1 (YT8521S), main control gigabit network interface circuit 2 (YT8521S), RS485 interface circuit (NSiP83086), input level signal detection circuit (TLP293), output level signal control circuit (CMA51H-S-DC12V), USB interface circuit, HDMI interface circuit, reset button and indicator light circuit, board power management circuit (TPS5430DDA and LTC3225), RTC circuit (PCF8563T), fan control circuit (PMV250EPEA), extended memory circuit (NGFF-M.2-B-KEY), and watchdog circuit (SGM821).

[0048] Specifically, the power management circuit inside the board includes a TPS5430DDA chip and an LTC3225 chip. The power input of the main control board is stepped down to 5V by the TPS5430DDA chip to provide power to the board. The LTC3225 chip is used to connect to a supercapacitor to improve the power supply stability of the board.

[0049] The main control processor uses the RK3588 main control chip, and is equipped with 16G DD4 memory and 64G EMMC storage chip.

[0050] like Figure 7As shown, the RTC circuit includes a PCF8563T clock chip U24, which is connected with the master chip through an IIC interface and provides a system clock.

[0051] As shown, Figure 8 As shown, the watchdog circuit uses an SGM821 programmable watchdog chip U37 to realize an external watchdog function and improve the usability of the system.

[0052] As shown, Figure 9 As shown, the reset circuit includes a switch SW1, a TVS tube array D21, a capacitor C281, a resistor R528, a capacitor C282, and a resistor R496. One end of the switch SW1 is grounded, and the other end is connected to the TVS tube array D21, one end of the capacitor C281, one end of the resistor R528, one end of the capacitor C282, one end of the resistor R496, and the other end of the resistor R496 is connected to the power supply VCC.

[0053] As shown, Figure 10 As shown, Figure 11 As shown, the output level signal control circuit uses a CMA51H-S-DC12V type relay.

[0054] Further, the expansion board circuit includes a board power management circuit (TPS5430DDA), a network switching circuit (RTL8367), an expansion gigabit network interface (YT8521S, a total of 5 in the embodiment), and a coprocessor expansion interface (ASOB826-S78B-7H). The expansion gigabit network interface is connected with the network switching circuit. In the embodiment, the coprocessor expansion interface has two, which are connected with one expansion gigabit network interface respectively, so as to realize the expansion of computing power.

[0055] The laser radar video integrated monitoring device provided in the embodiment has the following beneficial effects:

[0056] (1) Based on the three-dimensional laser radar and combined with the camera, the device realizes the three-dimensional space protection, and the monitoring capability is not affected by light or bad weather. It is suitable for most outdoor environments, and can work normally even in strong light or at night. It is less affected by bad weather, and can operate stably for a long time all day long, reducing the risk of missing reports. In addition, the device is provided with heat dissipation holes on the rainproof cover and the mounting plate, which improves the heat dissipation efficiency and realizes the rainproof function.

[0057] (2) The camera without red exposure is adopted, which reduces the visual impact on the driver.

[0058] (3) The coprocessor expansion design is adopted to improve the computing power of the device.

[0059] (4) The device has sufficient data bandwidth by using a gigabit network interface.

[0060] (5) The structure design of the laser radar video integrated machine is adopted to position the relative positions of the laser radar and the camera, thereby improving the consistency of the external parameters.

[0061] Embodiment Two

[0062] The embodiment provides a laser radar video integrated monitoring device, which is based on the embodiment one and is applied to a specific application scenario to realize perimeter intrusion early warning monitoring.

[0063] In the field of rail transit safety, the rail area is frequently invaded by personnel, large wild animals, scattered stones, debris flow and various foreign matters. Such events have caused serious consequences many times, including forced emergency stop of trains, even overturning of trains, significant disturbance to train operation order, inestimable personnel casualties and economic losses, and wide social concern. In the field of electronic monitoring technology, radar speed measurement and video capture are basic technical requirements of related monitoring products. With further development of technology, a radar video integrated monitoring device has become a development trend of electronic monitoring devices. The radar video integrated monitoring device integrates radar speed measurement and video capture into the same device, so that the target can be accurately captured and measured in the video monitoring.

[0064] However, the existing radar video integrated monitoring device can only perform simple video monitoring and capture, and the monitoring image cannot be conveniently seen at the network camera end, the information interaction between the two parties cannot be conveniently realized, the functionality and the use field are limited, and further improvement is needed.

[0065] The laser radar video integrated monitoring device provided in the embodiment includes a device main body, a front-end processing unit cabinet and an alarm server, the device main body and the front-end processing unit cabinet are connected through a network and power supply, the front-end processing unit cabinet and the alarm server are connected through a network, and the power supply device of the front-end processing unit cabinet supplies power to the three-dimensional laser radar and the camera.

[0066] The front-end processing unit cabinet includes a power module, a switch and an intelligent analysis terminal, and is connected to the machine room device through a network cable.

[0067] The intelligent analysis terminal includes a power board card circuit, a main control board card circuit and an expansion board card circuit, the power board card circuit uses a board card connector to supply power to the main control board card circuit and the expansion board card circuit, the main control board card circuit is connected with the expansion board card circuit through a network interface, and the external device is connected through an interface driving circuit on the board card.

[0068] Further, the power board card circuit includes an EMI power noise suppression circuit, an over / under voltage protection circuit, and an isolated power supply. The input end of the power board card circuit uses a filter DNF100-2x5A that can be installed on a PCB to reduce the conduction interference of the power line on the PCB, the power supply realizes overvoltage, undervoltage, and overcurrent protection through an LM5069 chip, and then realizes power isolation through a URB2412LD power module. After the power output, the power supply is connected to the main control board and the expansion board through a connector for power supply.

[0069] The main control board card circuit includes a power management circuit inside the board card, a memory, a storage, an RTC circuit, a fan control circuit, an expansion memory circuit, a watchdog circuit, a main control gigabit network interface circuit 1 and a main control gigabit network interface circuit 2, an HDMI interface circuit, a USB interface circuit, an output level signal control circuit, an input level signal detection circuit, an RS485 interface circuit, a reset button, and an indicator light circuit.

[0070] In operation, the power input of the main control board card is stepped down to 5V by a TPS5430DDA chip to provide power supply for the board card, and a super capacitor is connected by an LTC3225 chip to improve the stability of the power supply of the board card. The main control processor uses a main control chip of RK3588 type, and is configured with a 16G DD4 memory and a 64G EMMC storage chip. A PCF8563T clock chip is used to provide a system clock by being connected to the main control chip through an IIC interface. An SGM821 programmable watchdog chip is used to realize an external watchdog function and improve the usability of the system. An M.2 connector of NGFF-M.2-B-KEY type is used to expand a solid state disk. An MOS tube of PMV250EPEA type is used to control the switching of a cooling fan to cool the hardware and improve the stability of the system. Two chips of YT8521S type are used, one of which is connected to a network switching chip RTL8367 of the expansion board card circuit, and the other of which is connected to a host panel through a network transformer as a network interface of the device. A UART interface of the main control chip is connected to a host panel through a NSiP83086C isolation chip as an RS485 interface of the device. An IO interface of the main control chip is connected to a host panel through a TLP293 optocoupler as an input of the device. An IO interface of the main control chip is connected to the main control board through a relay of CMA51H-S-DC12V type as an output of the device. A USB3.0 pin of the main control chip is connected to a host panel through a USB3.0 socket as a USB3.0 interface of the device. An HDMI pin of the main control chip is connected to a host panel through an HDMI2.1 socket as an HDMI2.1 interface of the device. An IO pin of the main control chip is connected to a host panel through a key switch as a reset button of the device, and an IO pin of the main control chip is connected to a host panel through an LED lamp as an indicator light of the device.

[0071] The expansion board circuit includes network switching circuit, power management circuit in the board, first expansion gigabit network interface, second expansion gigabit network interface, first coprocessor expansion interface and second coprocessor expansion interface. The expansion board power input is stepped down to 5V by TPS5430DDA chip to provide board power supply, 6-way network interface of network switching chip RTL8367, 2-way is connected to host panel through YT8521S chip and network transformer, 1-way is connected to network interface of host board through YT8521S chip. 2-way is connected to connector model ASOB826-S78B-7H through YT8521S chip respectively, as the expansion interface of coprocessor, to realize the computing power expansion of system.

[0072] The laser radar video integrated monitoring device provided by the embodiment combines three-dimensional laser radar and video, can intelligently identify and analyze the invasion of foreign matters in the rail defense area, and solves the problems of high false alarm rate and difficult manual confirmation of rail perimeter intrusion.

[0073] The above-described embodiments are only a preferred scheme of the present application, and do not limit the present application in any form, and other variants and modifications are possible without departing from the technical scheme recited in the claims.

Claims

1. A laser radar video integrated monitoring device, characterized in that, It include: the casing, three-dimensional laser radar and camera are installed inside the casing, the casing includes installation bottom plate, front panel and rainproof cover are installed on the installation bottom plate, the installation bottom plate and rainproof cover are equipped with heat dissipation hole, the installation bottom plate is connected with support flat plate through universal support, the support flat plate is fixed on the pipe cross arm through U-shaped clamp.

2. The laser radar video integrated monitoring device according to claim 1, wherein, The three-dimensional laser radar is connected with main control board circuit, the camera is connected with main control board circuit, and the main control board circuit is connected with power board circuit.

3. The laser radar video integrated monitoring device according to claim 2, characterized in that, The power board circuit includes power supply noise suppression circuit, the power supply noise suppression circuit is connected with protection circuit, and the protection circuit is connected with isolation circuit.

4. The laser radar video integrated monitoring device according to claim 2 or 3, characterized in that, The main control board is connected with expansion board circuit, the expansion board circuit includes network switching circuit, the network switching circuit is connected with network interface, and the network interface is connected with coprocessor expansion interface.

5. The laser radar video integrated monitoring device according to claim 2 or 3, characterized in that, The main control board circuit includes voltage reduction circuit, the voltage reduction circuit is connected with core plate, the core plate is connected with input level signal detection connection and output level signal control circuit.

6. The laser radar video integrated monitoring device according to claim 1 or 2 or 3, characterized in that, The support flat plate is equipped with clamping tooth and adjustable U-shaped clamp fixing hole.

7. The laser radar video integrated monitoring device according to claim 1 or 2 or 3, characterized in that, The universal support is equipped with adjusting hole.

8. The laser radar video integrated monitoring device according to claim 1 or 2 or 3, characterized in that, The front panel is equipped with window, the window is opposite camera lens and three-dimensional laser radar.

9. The laser radar video integrated monitoring device according to claim 8, wherein, The waterproof glass is installed on the window, and waterproof sealing ring is arranged at the connecting position of the waterproof glass and the window.

10. The laser radar video integrated monitoring device according to claim 1 or 2 or 3, characterized in that, The camera is a non-red exposure camera.

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