Railway crossing safety monitoring system

Abstract

The utility model relates to a railway crossing safety monitoring system, which belongs to the technical field of railway crossing monitoring and comprises a camera, a control circuit, a remote monitoring terminal and a power supply module, the control circuit comprises a video collector, a filter amplification circuit, a video synchronous separation circuit, an A / D conversion circuit, an FPGA, an optical fiber communication module, a D / A conversion circuit and an analog amplification circuit, the camera is connected to a display arranged on the remote monitoring terminal through the control circuit, and the FPGA is further connected to the remote monitoring terminal through the optical fiber communication module. According to the utility model, through the arrangement of the camera, the control circuit electrically connected with the camera and the remote monitoring terminal, remote monitoring of the railway crossing is realized, and meanwhile, monitored video information is preprocessed, so that the accuracy of data is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway crossing monitoring, and in particular relates to a railway crossing safety monitoring system. Background Art

[0002] Railway is a track line for trains and other vehicles to travel. Railway transportation is a land transportation mode, in which locomotives pull train vehicles on two parallel rails. The traditional mode is steel wheel travel, but the broad sense of railway transportation also includes non-steel wheel travel modes such as maglev trains, cable cars, and ropeways. Railway crossing refers to the intersection of the road and the railway plane. At present, in order to ensure the safety of railway crossings, supervisors are set up at railway crossings. Supervisors monitor railway crossings through visual inspection or monitors to prevent traffic accidents and eliminate safety hazards in time. However, the use of manual supervision has the following shortcomings: special supervisors are required, which increases manpower, financial resources and material resources. Moreover, the supervisors have limited energy and cannot be 100% invested 24 hours a day. The monitoring reliability is not high, which is the shortcoming of the existing technology. Summary of the invention

[0003] The purpose of the utility model is to provide a railway crossing safety monitoring system designed to solve the problems existing in the prior art in view of the defects existing in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A railway crossing safety monitoring system, comprising a camera arranged at the railway crossing, a control circuit electrically connected to the camera, a remote monitoring terminal and a power module for supplying power to the entire system;

[0006] The control circuit includes a video collector, a filter amplifier circuit, a video synchronization separation circuit, an A / D conversion circuit, an FPGA, an optical fiber communication module, a D / A conversion circuit and an analog amplifier circuit. The input end of the video collector is connected to the camera, and the output end of the video collector is connected to the input end of the FPGA through the filter amplifier circuit, the video synchronization separation circuit and the A / C conversion circuit in sequence. The output end of the FPGA is connected to the first end of the D / A conversion circuit through the optical fiber communication module, and the second end of the D / A conversion circuit is connected to a display arranged on a remote monitoring terminal through the analog amplifier circuit. The FPGA is also connected to the remote monitoring terminal through the optical fiber communication module.

[0007] Further improvements of the technical solution include: the filtering and amplifying circuit includes a resistor R1, a resistor R2, a capacitor C1, an amplifier U1, a resistor R3, a resistor R4 and a capacitor C2, the first end of the resistor R1 is connected to the output end of the video collector, the second end of the resistor R1 is connected to the first end of the resistor R2 and the first end of the capacitor C1, the second end of the resistor R2 is grounded, the second end of the capacitor C1 is connected to the inverting input end of the amplifier U1, the non-inverting input end of the amplifier U1 is grounded, the output end of the amplifier U1 is connected to the second end of the resistor R1 through the capacitor C2, the output end of the amplifier U1 is connected to the inverting input end of the amplifier U1 through the resistor R4, and the output end of the amplifier U1 is also connected to the video synchronization separation circuit.

[0008] Further improvements of the technical solution include: the video synchronization separation circuit includes a capacitor C3, a video synchronization separation chip U2, a resistor R5 and a capacitor C4, the first end of the capacitor C3 is connected to the output end of the amplifier U1, the second end of the capacitor C3 is connected to the first pin of the video synchronization separation chip U2, the second pin of the video synchronization separation chip U2 is grounded through the capacitor C4 and the resistor R5 arranged in parallel, the third pin of the video synchronization separation chip U2 is grounded, the fourth pin of the video synchronization separation chip U2 is connected to the power module, the fifth pin of the video synchronization separation chip U2 is connected to the A / D conversion circuit, and the sixth pin, the seventh pin and the eighth pin of the video synchronization separation chip U2 are all connected to the FPGA.

[0009] A further improvement of the technical solution is that the video synchronization separation chip U2 adopts a video synchronization separation chip of model LM1881.

[0010] A further improvement of the technical solution is that the A / D conversion circuit includes an analog-to-digital conversion chip U3, a capacitor C5, a capacitor C6, a resistor R6, a resistor R7, a capacitor C7, a capacitor C8 and a capacitor C9;

[0011] The first pin of the analog-to-digital conversion chip U3 is connected to the fifth pin of the video synchronization separation chip U2, the second pin of the analog-to-digital conversion chip U3 is grounded through capacitors C5 and C6 connected in parallel, the second pin of the analog-to-digital conversion chip U3 is connected to the first end of resistor R6, the second end of resistor R6 is connected to the third pin of the analog-to-digital conversion chip U3 and the first end of resistor R7, the second end of resistor R7 is grounded, the fourth pin of the analog-to-digital conversion chip U3 is grounded through capacitors C7 and C8 connected in series, the fifth pin of the analog-to-digital conversion chip U3 is grounded through capacitor C9, and the digital signal output pin of the analog-to-digital conversion chip U3 is connected to the FPGA.

[0012] A further improvement of the technical solution is that the D / A conversion circuit includes a digital-to-analog conversion chip U4, a capacitor C10, a resistor R8, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15 and a capacitor C16;

[0013] The digital signal pin of the digital-to-analog conversion chip U4 is connected to the optical fiber communication module, the first pin of the digital-to-analog conversion chip U4 is grounded through a capacitor C10, the second pin of the digital-to-analog conversion chip U4 is grounded through a resistor R8, the third pin of the digital-to-analog conversion chip U4 is connected to the power module through a capacitor C11, the fourth pin of the digital-to-analog conversion chip U4 is connected to the analog amplifier circuit, the fifth pin of the digital-to-analog conversion chip U4 is grounded through a capacitor C12, the sixth pin of the digital-to-analog conversion chip U4 is grounded through a capacitor C13 and a capacitor C14 connected in parallel, the sixth pin of the digital-to-analog conversion chip U4 is connected to the power module, the seventh pin of the digital-to-analog conversion chip U4 is connected to the power module, and the seventh pin of the digital-to-analog conversion chip U4 is grounded through a capacitor C15 and a capacitor C16 connected in parallel.

[0014] A further improvement of the technical solution is that the analog amplifier circuit includes a resistor R9, a resistor R10, an amplifier U5, a resistor R11, a capacitor C17 and a resistor R12;

[0015] The first end of the resistor R9 is connected to the power module, the second end of the resistor R9 is connected to the first end of the resistor R10 and the in-phase input end of the amplifier U5, the second end of the resistor R10 is grounded, the reverse input end of the amplifier U5 is connected to the fourth pin of the digital-to-analog conversion chip U4, the output end of the amplifier U5 is connected to the reverse input end of the amplifier U5 through a parallel resistor R11 and a capacitor C17, and the output end of the amplifier U5 is connected to a display set on the remote monitoring terminal through a resistor R12.

[0016] A further improvement of the technical solution is that it also includes a local control box, in which the video collector, the filter amplifier circuit, the video synchronization separation circuit, the A / D conversion circuit and the FPGA are all arranged.

[0017] A further improvement of the technical solution is that the video collector adopts a video collector of model ADV7181B.

[0018] The beneficial effect of the utility model is that the utility model realizes remote monitoring of railway crossings by means of a camera, a control circuit electrically connected to the camera, and a remote monitoring terminal. At the same time, the utility model also pre-processes the monitored video information to improve the accuracy of the data.

[0019] In addition, the utility model has a reliable design principle, a simple structure and a very broad application prospect.

[0020] It can be seen that compared with the prior art, the present invention has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a relationship diagram of the monitoring system.

[0022] Figure 2 This is the schematic diagram of the filter amplifier circuit.

[0023] Figure 3 This is the schematic diagram of the video synchronization separation circuit.

[0024] Figure 4 This is the schematic diagram of the A / D conversion circuit.

[0025] Figure 5 This is the schematic diagram of the D / A conversion circuit.

[0026] Figure 6 This is the schematic diagram of the analog amplifier circuit.

[0027] 110 is a camera, 121 is a video collector, 122 is a filter amplifier circuit, 123 is a video synchronization separation circuit, 124 is an A / D conversion circuit, 125 is an FPGA, 126 is an optical fiber communication module, 127 is a D / A conversion circuit, 128 is an analog amplifier circuit, 130 is a remote monitoring terminal, 131 is a display, and 140 is a power module. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] The key terms appearing in the present invention are explained below.

[0031] FPGA is the abbreviation of Field-Programmable Gate Array, which is a further development of programmable devices such as PAL, GAL, CPLD, etc. It is a semi-custom circuit in the field of application-specific integrated circuits (ASICs), which not only solves the shortcomings of custom circuits, but also overcomes the shortcomings of the limited number of gate circuits of the original programmable devices.

[0032] like Figure 1 As shown, the utility model provides a railway crossing safety monitoring system, including a camera arranged at the railway crossing, a control circuit electrically connected to the camera, a remote monitoring terminal, and a power module for supplying power to the entire system; the control circuit includes a video collector, a filter amplifier circuit, a video synchronization separation circuit, an A / D conversion circuit, an FPGA, an optical fiber communication module, a D / A conversion circuit, and an analog amplifier circuit, the input end of the video collector is connected to the camera, the output end of the video collector is connected to the input end of the FPGA through the filter amplifier circuit, the video synchronization separation circuit, and the A / C conversion circuit in sequence, the output end of the FPGA is connected to the first end of the D / A conversion circuit through the optical fiber communication module, the second end of the D / A conversion circuit is connected to the display arranged on the remote monitoring terminal through the analog amplifier circuit, and the FPGA is also connected to the remote monitoring terminal through the optical fiber communication module. Among them, the video collector adopts a video collector of model ADV7181B.

[0033] like Figure 2 As shown, the filtering and amplifying circuit includes a resistor R1, a resistor R2, a capacitor C1, an amplifier U1, a resistor R3, a resistor R4 and a capacitor C2, wherein the first end of the resistor R1 is connected to the output end of the video collector, the second end of the resistor R1 is connected to the first end of the resistor R2 and the first end of the capacitor C1, the second end of the resistor R2 is grounded, the second end of the capacitor C1 is connected to the inverting input end of the amplifier U1, the non-inverting input end of the amplifier U1 is grounded, the output end of the amplifier U1 is connected to the second end of the resistor R1 through the capacitor C2, the output end of the amplifier U1 is connected to the inverting input end of the amplifier U1 through the resistor R4, and the output end of the amplifier U1 is also connected to the video synchronization separation circuit.

[0034] like Figure 3 As shown, the video synchronization separation circuit includes a capacitor C3, a video synchronization separation chip U2, a resistor R5 and a capacitor C4, the first end of the capacitor C3 is connected to the output end of the amplifier U1, the second end of the capacitor C3 is connected to the first pin of the video synchronization separation chip U2, the second pin of the video synchronization separation chip U2 is grounded through the capacitor C4 and the resistor R5 arranged in parallel, the third pin of the video synchronization separation chip U2 is grounded, the fourth pin of the video synchronization separation chip U2 is connected to the power module, the fifth pin of the video synchronization separation chip U2 is connected to the A / D conversion circuit, and the sixth pin, the seventh pin and the eighth pin of the video synchronization separation chip U2 are all connected to the FPGA. Among them, the video synchronization separation chip U2 adopts a video synchronization separation chip of model LM1881.

[0035] like Figure 4As shown, the A / D conversion circuit includes an analog-to-digital conversion chip U3, a capacitor C5, a capacitor C6, a resistor R6, a resistor R7, a capacitor C7, a capacitor C8 and a capacitor C9; a first pin of the analog-to-digital conversion chip U3 is connected to the fifth pin of the video synchronization separation chip U2, a second pin of the analog-to-digital conversion chip U3 is grounded through the capacitor C5 and the capacitor C6 connected in parallel, a second pin of the analog-to-digital conversion chip U3 is connected to the first end of the resistor R6, a second end of the resistor R6 is connected to the third pin of the analog-to-digital conversion chip U3 and the first end of the resistor R7, a second end of the resistor R7 is grounded, a fourth pin of the analog-to-digital conversion chip U3 is grounded through the capacitor C7 and the capacitor C8 connected in series, a fifth pin of the analog-to-digital conversion chip U3 is grounded through the capacitor C9, and a digital signal output pin of the analog-to-digital conversion chip U3 is connected to the FPGA.

[0036] like Figure 5 As shown, the D / A conversion circuit includes a digital-to-analog conversion chip U4, a capacitor C10, a resistor R8, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15 and a capacitor C16; the digital signal pin of the digital-to-analog conversion chip U4 is connected to the optical fiber communication module, the first pin of the digital-to-analog conversion chip U4 is grounded through the capacitor C10, the second pin of the digital-to-analog conversion chip U4 is grounded through the resistor R8, the third pin of the digital-to-analog conversion chip U4 is connected to the power module through the capacitor C11, the fourth pin of the digital-to-analog conversion chip U4 is connected to the analog amplifier circuit, the fifth pin of the digital-to-analog conversion chip U4 is grounded through the capacitor C12, the sixth pin of the digital-to-analog conversion chip U4 is grounded through the capacitor C13 and the capacitor C14 connected in parallel, the sixth pin of the digital-to-analog conversion chip U4 is connected to the power module, the seventh pin of the digital-to-analog conversion chip U4 is connected to the power module, and the seventh pin of the digital-to-analog conversion chip U4 is grounded through the capacitor C15 and the capacitor C16 connected in parallel.

[0037] like Figure 6 As shown, the analog amplifier circuit includes a resistor R9, a resistor R10, an amplifier U5, a resistor R11, a capacitor C17 and a resistor R12; the first end of the resistor R9 is connected to the power module, the second end of the resistor R9 is connected to the first end of the resistor R10 and the in-phase input end of the amplifier U5, the second end of the resistor R10 is grounded, the reverse input end of the amplifier U5 is connected to the fourth pin of the digital-to-analog conversion chip U4, the output end of the amplifier U5 is connected to the reverse input end of the amplifier U5 through the parallel resistor R11 and the capacitor C17, and the output end of the amplifier U5 is connected to the display set on the remote monitoring terminal through the resistor R12.

[0038] In addition, the monitoring system also includes a local control box, in which a video collector, a filter amplifier circuit, a video synchronization separation circuit, an A / D conversion circuit and an FPGA are all arranged.

[0039] The above disclosure is only the preferred implementation mode of the utility model, but the utility model is not limited thereto. Any non-creative changes that can be thought of by technicians in this field, as well as several improvements and modifications made without departing from the principle of the utility model, should fall within the scope of protection of the utility model.

Claims

1. A railway crossing safety monitoring system, characterized in that: It includes a camera installed at a railway crossing, a control circuit electrically connected to the camera, a remote monitoring terminal, and a power module for supplying power to the entire system; The control circuit includes a video collector, a filter amplifier circuit, a video synchronization separation circuit, an A / D conversion circuit, an FPGA, an optical fiber communication module, a D / A conversion circuit and an analog amplifier circuit. The input end of the video collector is connected to the camera, and the output end of the video collector is connected to the input end of the FPGA through the filter amplifier circuit, the video synchronization separation circuit and the A / C conversion circuit in sequence. The output end of the FPGA is connected to the first end of the D / A conversion circuit through the optical fiber communication module, and the second end of the D / A conversion circuit is connected to a display arranged on a remote monitoring terminal through the analog amplifier circuit. The FPGA is also connected to the remote monitoring terminal through the optical fiber communication module.

2. The railway crossing safety monitoring system according to claim 1, characterized in that: The filtering and amplifying circuit includes a resistor R1, a resistor R2, a capacitor C1, an amplifier U1, a resistor R3, a resistor R4 and a capacitor C2. The first end of the resistor R1 is connected to the output end of the video collector, the second end of the resistor R1 is connected to the first end of the resistor R2 and the first end of the capacitor C1, the second end of the resistor R2 is grounded, the second end of the capacitor C1 is connected to the inverting input end of the amplifier U1, the non-inverting input end of the amplifier U1 is grounded, the output end of the amplifier U1 is connected to the second end of the resistor R1 through the capacitor C2, the output end of the amplifier U1 is connected to the inverting input end of the amplifier U1 through the resistor R4, and the output end of the amplifier U1 is also connected to the video synchronization separation circuit.

3. The railway crossing safety monitoring system according to claim 2, characterized in that: The video synchronization separation circuit includes a capacitor C3, a video synchronization separation chip U2, a resistor R5 and a capacitor C4. The first end of the capacitor C3 is connected to the output end of the amplifier U1, the second end of the capacitor C3 is connected to the first pin of the video synchronization separation chip U2, the second pin of the video synchronization separation chip U2 is grounded through the capacitor C4 and the resistor R5 arranged in parallel, the third pin of the video synchronization separation chip U2 is grounded, the fourth pin of the video synchronization separation chip U2 is connected to the power module, the fifth pin of the video synchronization separation chip U2 is connected to the A / D conversion circuit, and the sixth pin, the seventh pin and the eighth pin of the video synchronization separation chip U2 are all connected to the FPGA.

4. The railway crossing safety monitoring system according to claim 3, characterized in that: The video synchronization separation chip U2 adopts a video synchronization separation chip model LM1881.

5. The railway crossing safety monitoring system according to claim 3, characterized in that: The A / D conversion circuit includes an analog-to-digital conversion chip U3, a capacitor C5, a capacitor C6, a resistor R6, a resistor R7, a capacitor C7, a capacitor C8 and a capacitor C9; The first pin of the analog-to-digital conversion chip U3 is connected to the fifth pin of the video synchronization separation chip U2, the second pin of the analog-to-digital conversion chip U3 is grounded through capacitors C5 and C6 connected in parallel, the second pin of the analog-to-digital conversion chip U3 is connected to the first end of resistor R6, the second end of resistor R6 is connected to the third pin of the analog-to-digital conversion chip U3 and the first end of resistor R7, the second end of resistor R7 is grounded, the fourth pin of the analog-to-digital conversion chip U3 is grounded through capacitors C7 and C8 connected in series, the fifth pin of the analog-to-digital conversion chip U3 is grounded through capacitor C9, and the digital signal output pin of the analog-to-digital conversion chip U3 is connected to the FPGA.

6. The railway crossing safety monitoring system according to claim 1, characterized in that: The D / A conversion circuit includes a digital-to-analog conversion chip U4, a capacitor C10, a resistor R8, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15 and a capacitor C16; The digital signal pin of the digital-to-analog conversion chip U4 is connected to the optical fiber communication module, the first pin of the digital-to-analog conversion chip U4 is grounded through a capacitor C10, the second pin of the digital-to-analog conversion chip U4 is grounded through a resistor R8, the third pin of the digital-to-analog conversion chip U4 is connected to the power module through a capacitor C11, the fourth pin of the digital-to-analog conversion chip U4 is connected to the analog amplifier circuit, the fifth pin of the digital-to-analog conversion chip U4 is grounded through a capacitor C12, the sixth pin of the digital-to-analog conversion chip U4 is grounded through a capacitor C13 and a capacitor C14 connected in parallel, the sixth pin of the digital-to-analog conversion chip U4 is connected to the power module, the seventh pin of the digital-to-analog conversion chip U4 is connected to the power module, and the seventh pin of the digital-to-analog conversion chip U4 is grounded through a capacitor C15 and a capacitor C16 connected in parallel.

7. The railway crossing safety monitoring system according to claim 6, characterized in that: The analog amplifier circuit includes a resistor R9, a resistor R10, an amplifier U5, a resistor R11, a capacitor C17 and a resistor R12; The first end of the resistor R9 is connected to the power module, the second end of the resistor R9 is connected to the first end of the resistor R10 and the in-phase input end of the amplifier U5, the second end of the resistor R10 is grounded, the reverse input end of the amplifier U5 is connected to the fourth pin of the digital-to-analog conversion chip U4, the output end of the amplifier U5 is connected to the reverse input end of the amplifier U5 through a parallel resistor R11 and a capacitor C17, and the output end of the amplifier U5 is connected to a display set on the remote monitoring terminal through a resistor R12.

8. The railway crossing safety monitoring system according to claim 1, characterized in that: It also includes a local control box, in which a video collector, a filter amplifier circuit, a video synchronization separation circuit, an A / D conversion circuit and an FPGA are all arranged.

9. The railway crossing safety monitoring system according to claim 1, characterized in that: The video collector used is ADV7181B.

Images