Power grid fault detector for natural disasters and foreign matter invasion of high-speed railway
The power grid fault detector, which combines an inductive inductor, a coupling capacitor, and an operational amplifier circuit, solves the problem of the existing technology that it is unable to quickly detect dual-grid sensor faults, achieves rapid and accurate fault judgment, and improves high-speed rail driving safety.
Patent Information
- Application Number
- CN202422123460.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-08-30
AI Technical Summary
Existing technologies cannot quickly detect faults in high-speed railway dual-grid sensors without opening the junction box, resulting in time-consuming and labor-intensive troubleshooting and affecting high-speed railway operating safety.
A high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector is designed. It uses a combination of inductive inductors, coupling capacitors, operational amplifier circuits, and sound and light alarm circuits to detect whether the dual power grid sensor wires are charged in a non-contact manner, and uses a buzzer and LED indicator to indicate the fault status.
It can quickly and accurately judge the fault of dual-grid sensors without opening the junction box, which improves the efficiency of troubleshooting, reduces the difficulty of operation and ensures the safety of high-speed rail operation.
Smart Images
Figure CN223377478U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a power grid fault detector, in particular to a power grid fault detector for natural disasters and foreign object intrusion in high-speed railways, which is mainly used for detecting faults of dual power grid sensors in a natural disaster and foreign object intrusion monitoring system in high-speed railways. Background Art
[0002] The dual-grid sensor is the main equipment of the high-speed railway natural disaster and foreign object intrusion monitoring system. It is used to block foreign objects. When foreign objects invade the railway limit and the dual-grid sensor fails, the dual-grid is disconnected, automatically triggering the train control and interlocking system to make the train stop urgently, thereby causing a red light band on the line, affecting the safety of high-speed railway operation.
[0003] According to the "High-Speed Railway Natural Disaster and Foreign Object Intrusion Monitoring System - Interim Technical Conditions for On-site Collection Equipment for Dual-Grid Foreign Object Intrusion on Road and Bridges Over Railways" (Standard Technical Document No.: TJ / GW173-2021), the dual-grid sensor's signal cable is encapsulated in fiberglass, and the input and output signal cables are connected via a junction box to prevent water intrusion and short circuits. If a cable within a dual-grid sensor is damaged, it's impossible to directly determine the fault from its appearance. In most cases, testing a dual-grid sensor requires opening the junction box to inspect each grid, which is extremely time-consuming and labor-intensive. This puts a significant strain on the limited time available for troubleshooting and replacing the grid.
[0004] Currently, there is no detection equipment that can quickly troubleshoot dual-grid sensor faults from the outside without opening the junction box. Utility Model Content
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] The utility model provides a high-speed railway natural disaster and foreign body intrusion restricted power grid fault detector, comprising: a power supply module, and an inductive inductor, a coupling capacitor, an operational amplifier circuit and an audible and visual alarm circuit connected in sequence;
[0007] The power supply module is connected to the operational amplifier circuit and the sound and light alarm circuit to provide power;
[0008] One end of the inductive inductor is connected to one end of the coupling capacitor, and the other end of the inductive inductor is exposed to the high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector, so as to sense whether there is electricity in the wire of the dual-grid sensor under test;
[0009] If there is electricity in the wire of the dual-grid sensor under test, the electrical signal sensed by the inductive inductor enters the operational amplifier circuit through the coupling capacitor; the operational amplifier circuit amplifies the electrical signal and then drives the sound and light alarm circuit to sound and light alarm.
[0010] Based on the above, the operational amplifier circuit is a three-stage operational amplifier circuit, including a transistor Q1, a transistor Q2, and a transistor Q3; the base of the transistor Q1 is connected to the other end of the coupling capacitor, the emitter of the transistor Q1 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to the base of the transistor Q3, the emitter of the transistor Q3 is grounded, the collectors of the transistor Q1 and the transistor Q2 are connected to a power supply, and the collector of the transistor Q3 serves as a drive output end.
[0011] Based on the above, the sound and light alarm circuit includes a buzzer and an LED indicator light; the LED indicator light is connected in series with a current limiting resistor R and then in parallel with the buzzer. After parallel connection, one end is connected to the collector of the transistor Q3 and the other end is connected to the power supply.
[0012] Based on the above, the power module includes a charging interface, a charging management circuit and a battery connected in sequence; the charging management circuit adopts a MAX1811 chip; and the battery is a rechargeable lithium battery.
[0013] Based on the above, it also includes a pen-shaped plastic shell; the tail part of the pen-shaped plastic shell is configured as a battery compartment for placing batteries, and the tip part is configured as an induction end extending from the other end of the induction inductor.
[0014] The present invention has substantial features and advancements over the prior art. Specifically:
[0015] 1. This power grid fault detector uses a non-contact method to troubleshoot dual power grid sensors. There is no need to open the junction box, which is easy to use.
[0016] 2. This power grid fault detector can determine whether there is a fault through the buzzer and LED indicator light. It is easy to use and can quickly and accurately find the fault point, reducing the difficulty of troubleshooting and greatly improving work efficiency.
[0017] 3. This power grid fault detector adopts a pen-shaped plastic shell structure, which is small in size, light in weight and easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a principle block diagram of the utility model power grid fault detector.
[0019] Figure 2 The utility model is a circuit principle diagram of the power supply part of the power grid fault detector.
[0020] Figure 3 The utility model is a circuit principle diagram of the sensing and detection parts of the power grid fault detector.
[0021] Figure 4 It is a structural diagram of the utility model power grid fault detector. DETAILED DESCRIPTION
[0022] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.
[0023] like Figure 1 As shown, this embodiment provides a high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector, including: a power module, and an inductive inductor, a coupling capacitor, an operational amplifier circuit and an audible and visual alarm circuit connected in sequence.
[0024] Regarding the power supply part, such as Figure 2 Said power supply module is connected to said operational amplifier circuit and said sound and light alarm circuit to provide power;
[0025] The power module includes a charging interface, a charging management circuit and a battery connected in sequence;
[0026] The charging management circuit adopts MAX1811 chip; the battery is a rechargeable lithium battery;
[0027] The power module also includes a switch and a power adapter. The power adapter is used to charge the rechargeable lithium battery through the charging interface. The switch is used to turn on and off the power supply of the power grid fault detector. The switch is turned on when in use and turned off after use.
[0028] Regarding the sensing and detection part, such as Figure 3 As shown, one end of the inductive inductor is connected to one end of the coupling capacitor, and the other end of the inductive inductor is exposed to the high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector, so as to sense whether there is electricity in the wire of the dual-grid sensor under test;
[0029] If there is electricity in the wire of the dual-grid sensor under test, the electrical signal sensed by the inductive inductor enters the operational amplifier circuit through the coupling capacitor; the operational amplifier circuit amplifies the electrical signal and then drives the sound and light alarm circuit to sound and light alarm.
[0030] Specifically, the operational amplifier circuit is a three-stage operational amplifier circuit, including a transistor Q1, a transistor Q2, and a transistor Q3; the base of the transistor Q1 is connected to the other end of the coupling capacitor, the emitter of the transistor Q1 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to the base of the transistor Q3, the emitter of the transistor Q3 is grounded, the collectors of the transistor Q1 and the transistor Q2 are connected to the positive electrode of the power supply BT, and the collector of the transistor Q3 serves as a drive output end.
[0031] The sound and light alarm circuit includes a buzzer and an LED indicator light; the LED indicator light is connected in series with a current limiting resistor R and then in parallel with the buzzer. After the parallel connection, one end is connected to the collector of the triode Q3, and the other end is connected to the positive pole of the power supply BT through the switch SW.
[0032] The power grid fault detector of this embodiment uses the principle of contactless conductor liveness detection to detect whether the dual-grid sensor wires are live. The detection results are indicated by a buzzer and an LED indicator (if the LED indicator is on and the buzzer sounds, the wire is live; if the LED indicator is off and the buzzer does not sound, the wire is not live). This allows accurate detection of wire liveness without disassembling the junction box. If the wire is detected to be live, there is no fault; if the wire is detected to be not live, there is a fault point.
[0033] Dual-grid sensor faults can occur in two ways: single-line disconnection and dual-line disconnection. When a dual-line disconnection occurs, the high-speed railway natural disaster and foreign object intrusion limited-use grid fault detector can quickly and easily locate the fault point. When a single-line fault occurs, simply shut off the power to the undamaged grid line in the field controller and then use the grid fault detector to locate the fault point.
[0034] like Figure 4 As shown, this embodiment provides a specific structure of a power grid fault detector, including a pen-shaped plastic shell 1; the tail portion of the pen-shaped plastic shell 1 is configured as a battery compartment 2 for placing a battery, the tip portion is configured as a sensing end 3 extending from the other end of the inductor, a switch 4, an indicator light 5 and a buzzer 6 are respectively provided on the front of the pen-shaped plastic shell 1, and a charging port 7 is provided on the side.
[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector, characterized in that: include: A power module, and an inductive inductor, a coupling capacitor, an operational amplifier circuit, and an audible and visual alarm circuit connected in sequence; The power supply module is connected to the operational amplifier circuit and the sound and light alarm circuit to provide power; One end of the inductive inductor is connected to one end of the coupling capacitor, and the other end of the inductive inductor is exposed to the high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector, so as to sense whether there is electricity in the wire of the dual-grid sensor under test; If there is electricity in the wire of the dual-grid sensor under test, the electrical signal sensed by the inductive inductor enters the operational amplifier circuit through the coupling capacitor; the operational amplifier circuit amplifies the electrical signal and then drives the sound and light alarm circuit to sound and light alarm.
2. The high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector according to claim 1 is characterized by: The operational amplifier circuit is a three-stage operational amplifier circuit, including a transistor Q1, a transistor Q2, and a transistor Q3; The base of the transistor Q1 is connected to the other end of the coupling capacitor, the emitter of the transistor Q1 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to the base of the transistor Q3, the emitter of the transistor Q3 is grounded, the collectors of the transistors Q1 and Q2 are connected to a power supply, and the collector of the transistor Q3 serves as a drive output end.
3. The high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector according to claim 2, characterized in that: The sound and light alarm circuit includes a buzzer and an LED indicator light; The LED indicator light is connected in series with a current-limiting resistor R and then connected in parallel with the buzzer. After the parallel connection, one end is connected to the collector of the triode Q3 and the other end is connected to a power supply.
4. The high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector according to any one of claims 1 to 3, characterized in that: The power module includes a charging interface, a charging management circuit and a battery connected in sequence; The charging management circuit adopts MAX1811 chip; The battery is a rechargeable lithium battery.
5. The high-speed railway natural disaster and foreign object intrusion restricted power grid fault detector according to claim 4 is characterized by: It also includes a pen-shaped plastic shell; the tail part of the pen-shaped plastic shell is configured as a battery compartment for placing batteries, and the tip part is configured as an induction end extending from the other end of the induction inductor.