Railway safety protection circuit and system

Abstract

The present application relates to the field of magnetic levitation track, and discloses a track safety protection circuit and system, comprising: a control unit, a first alarm unit, an electromagnetic detection coil, a man-machine interaction unit; the electromagnetic detection coil is arranged on both sides of the power track to obtain the magnetic field intensity signal of the power track; the man-machine interaction unit is connected with the control unit to set the alarm condition for the control unit, so as to change the alarm condition of the power track as needed; the control unit is connected with the first alarm unit and the electromagnetic detection coil to obtain the magnetic field intensity signal, and when the magnetic field intensity signal meets the preset condition, the control unit controls the first alarm unit to be connected with the power supply. The scheme provided in the present application obtains the magnetic field intensity signal of the power track through the electromagnetic detection coil arranged at the track, judges the intensity of the magnetic field intensity signal using the control unit, and controls the first alarm unit to issue an alarm, thereby preventing the occurrence of danger caused by the management personnel's operation error or untimeliness.

Description

Technical Field

[0001] This invention relates to the field of magnetic levitation tracks, and in particular to a track safety protection circuit and system. Background Technology

[0002] High-speed maglev trains rely on electricity to create a levitation magnetic field to ensure normal operation. In practice, this is typically achieved by installing power rails on both sides of the maglev track to supply power to the magnetic field. Because these power rails are energized, to ensure the safety of personnel conducting on-site train testing, staff must be reminded to stay away from the power rails when they are energized.

[0003] Due to the long track length and high current intensity within the track, it is impossible to directly detect the current value in the power rail. Currently, the alarm unit of the power rail is usually manually activated by staff when power is applied. This method is inefficient and may lead to danger due to operator error or delay.

[0004] Therefore, it is evident that providing an efficient and accurate track safety protection circuit, enabling workers to accurately grasp the energized status of the power track and thus move away in a timely manner, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a track safety protection circuit and system that can promptly alert workers to stay away when the powered track is energized, thereby improving the safety of maglev tracks.

[0006] To address the aforementioned technical problems, this application provides a track safety protection circuit, comprising:

[0007] The system includes a control unit, a status display unit, a monitoring unit, and at least two electromagnetic detection coils.

[0008] Each of the electromagnetic detection coils is respectively set on both sides of the power track corresponding to each carriage to obtain the magnetic field strength signal of each power track;

[0009] The status display unit is connected to the electromagnetic detection coil to determine the detection current value in the target dynamic track corresponding to each electromagnetic detection coil based on the magnetic field strength signal, and to generate a display signal based on the detection current value.

[0010] The monitoring unit is used to collect the display signal and send the display signal to the control unit;

[0011] The control unit generates track power-on information based on the display signal and sends the track power-on information to the mobile terminal.

[0012] Preferably, the track power-on information includes: real-time power-on information and power-on trend information;

[0013] Accordingly, the control unit generates the track power-on information based on the display signal, including:

[0014] Acquire the display signal and determine the level information of the display signal;

[0015] The real-time power-on information is determined based on the level information, and the real-time power-on information includes power-on carriage information and power cabinet current information;

[0016] The power-on trend information is determined based on the real-time power-on information and the train's power consumption.

[0017] Preferably, determining the detection current value based on the magnetic field strength signal includes:

[0018] Acquire the magnetic field strength signal;

[0019] The detection current value corresponding to the magnetic field strength signal is determined according to the preset magnetic field current correspondence.

[0020] Preferably, the status display unit includes a buzzer and an indicator light;

[0021] When the magnetic field strength signal is higher than a first threshold and lower than a second threshold, both the buzzer and the indicator light operate at a first frequency;

[0022] When the magnetic field strength signal is higher than the second threshold, both the buzzer and the indicator light operate at the second frequency.

[0023] Preferably, the number of status display units is multiple;

[0024] Each of the aforementioned status display units corresponds to the power track corresponding to each of the aforementioned carriages.

[0025] Preferably, the monitoring unit includes a camera and a microphone;

[0026] The camera and the microphone are used to collect signals from the indicator light and the buzzer, respectively, so that the control unit can obtain the operating frequency of each status display unit.

[0027] Preferably, two electromagnetic detection coils are installed in the same detection area of ​​the power track.

[0028] Preferably, it also includes an alarm unit;

[0029] The alarm unit is connected to the control unit and is used to send an alarm to the management personnel when the control unit detects that the difference between the magnetic field strength signals of the two electromagnetic detection coils in the same detection area is greater than the detection threshold.

[0030] Preferably, the control unit and the mobile terminal are connected via a WiFi communication protocol.

[0031] To address the aforementioned technical problems, this application also provides a track safety protection system, including the track safety protection circuit described above.

[0032] This application provides a track safety protection circuit, including: a control unit, a status display unit, a monitoring unit, and at least one electromagnetic detection coil. Each electromagnetic detection coil is respectively disposed on both sides of the power track corresponding to each carriage to acquire the magnetic field strength signal of each power track. The status display unit is connected to the electromagnetic detection coil to determine the detection current value in the target power track corresponding to each electromagnetic detection coil based on the magnetic field strength signal, and generates a display signal based on the detection current value, so that management personnel can determine whether any power track is energized based on the display signal. The monitoring unit is used to collect the display signal and send the display signal to the control unit; the control unit generates track energization information based on the display signal and sends the track energization information to a mobile terminal, so that management personnel can grasp the energization status of the entire track. Therefore, the technical solution provided in this application uses electromagnetic detection coils to determine the current value in the power track, preventing danger caused by operator error during energization. Simultaneously, the control unit can also generate track energization information based on the display signal collected by the monitoring unit, enabling personnel to grasp the real-time energization status and trend of the entire track, thereby further improving safety.

[0033] In addition, this application also provides a track safety protection system, including the above-mentioned track safety protection circuit, with the same effect. Attached Figure Description

[0034] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a structural diagram of a track safety protection circuit provided in an embodiment of this application;

[0036] The attached diagram is labeled as follows: 1 is the control unit, 2 is the status display unit, 3 is the monitoring unit, and 4 is the electromagnetic detection coil. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0038] The core of this invention is to provide a track safety protection circuit and system that can promptly alert workers to stay away when the powered track is energized, thereby improving the safety of the maglev track.

[0039] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Figure 1 This is a structural diagram of a track safety protection circuit provided in an embodiment of this application, as shown below. Figure 1 As shown, the circuit includes:

[0040] Control unit 1, status display unit 2, monitoring unit 3, and at least two electromagnetic detection coils 4;

[0041] Each electromagnetic detection coil 4 is respectively set on both sides of the power track corresponding to each carriage to obtain the magnetic field strength signal of each power track;

[0042] The status display unit 2 is connected to the electromagnetic detection coil 4 to determine the detection current value in the target dynamic track corresponding to each electromagnetic detection coil 4 based on the magnetic field strength signal, and to generate a display signal based on the detection current value.

[0043] Monitoring unit 3 is used to collect display signals and send the display signals to control unit 1;

[0044] Control unit 1 generates track power-on information based on the display signal and sends the track power-on information to the mobile terminal.

[0045] In specific implementation, the electromagnetic detection coil 4 includes multiple electromagnetic detection coils 4, each electromagnetic detection coil 4 is set on both sides of the power track to obtain the magnetic field strength signal intensity in the power track, and send the magnetic field strength signal to the control unit 1, so that the control unit 1 can compare the magnetic field strength signal with the magnetic field threshold set in advance or through the human-machine interaction device, and determine the current value inside the power track according to the magnetic field strength signal value, thereby determining whether the power track is energized.

[0046] In specific implementations, a human-computer interaction device may also be included. This device is used to set parameter information for the status display unit 2, such as the first and second threshold values ​​of the magnetic field strength signal, as well as to set other software programs for the control unit 1. It is understood that the human-computer interaction device can be a keyboard or a touchscreen.

[0047] Control unit 1 can be set up separately, or it can be the electronic control unit 1 of the maglev track itself, which can reduce hardware costs.

[0048] The function of status display unit 2 is to provide alarm indication of the power track continuity. Status display unit 2 is controlled by control unit 1 to automatically trigger the alarm, thus eliminating the need for frequent manual monitoring, saving labor costs and ensuring good timeliness. It is understood that the connection between status display unit 2 and control unit 1 can be either wired or wireless.

[0049] The status display unit 2 may include a buzzer and an indicator light; when the magnetic field strength signal is higher than a first threshold and lower than a second threshold, both the buzzer and the indicator light operate at a first frequency; when the magnetic field strength signal is higher than the second threshold, both the buzzer and the indicator light operate at a second frequency. To improve the accuracy of detection, there are multiple status display units 2; each status display unit 2 corresponds to the power track of each carriage. Correspondingly, the monitoring unit 3 includes a camera and a microphone; the camera and microphone are used to collect signals from the indicator light and the buzzer, respectively, so that the control unit 1 can obtain the operating frequency of each status display unit 2.

[0050] This application provides a track safety protection circuit, including: a control unit, a status display unit, a monitoring unit, and at least one electromagnetic detection coil. Each electromagnetic detection coil is respectively disposed on both sides of the power track corresponding to each carriage to acquire the magnetic field strength signal of each power track. The status display unit is connected to the electromagnetic detection coil to determine the detection current value in the target power track corresponding to each electromagnetic detection coil based on the magnetic field strength signal, and generates a display signal based on the detection current value, so that management personnel can determine whether any power track is energized based on the display signal. The monitoring unit is used to collect the display signal and send the display signal to the control unit; the control unit generates track energization information based on the display signal and sends the track energization information to a mobile terminal, so that management personnel can grasp the energization status of the entire track. Therefore, the technical solution provided in this application uses electromagnetic detection coils to determine the current value in the power track, preventing danger caused by operator error during energization. Simultaneously, the control unit can also generate track energization information based on the display signal collected by the monitoring unit, enabling personnel to grasp the real-time energization status and trend of the entire track, thereby further improving safety.

[0051] In practical implementation, track power-on information includes: real-time power-on information and power-on trend information. Accordingly, the control unit 1 generates track power-on information based on the display signal by: acquiring the display signal and determining its level; determining real-time power-on information based on the level information, which includes information about the powered-on carriages and the power cabinet current; and determining power-on trend information based on the real-time power-on information and the train's power consumption.

[0052] In a preferred embodiment, determining the detection current value based on the magnetic field strength signal includes: acquiring the magnetic field strength signal; and determining the detection current value corresponding to the magnetic field strength signal according to a preset magnetic field current correspondence.

[0053] In a preferred embodiment, the electromagnetic detection coil 4 includes a plurality of electromagnetic detection coils 4, each electromagnetic detection coil 4 being disposed on both sides of the power track.

[0054] In practice, electromagnetic detection coils 4 are installed on both sides of the track, with a typical interval of 3 meters between each coil. Understandably, because the magnetic field strength signal within the electromagnetic detection coils 4 is weak and prone to interference, a signal processing unit is required to facilitate the control unit 1's determination of the current value in the power track based on the magnetic field strength signal. This signal processing unit includes a signal amplification circuit and a filtering circuit. The signal processing unit is connected to the electromagnetic detection coils 4 to acquire the initial magnetic field strength signal, and then amplifies and filters this signal to obtain the final magnetic field strength signal. The signal processing unit is also connected to the control unit 1 to send the initial magnetic field strength signal to the control unit 1.

[0055] To ensure stable signal transmission and prevent electromagnetic interference caused by the maglev track, the control unit 1 is connected to the electromagnetic detection coil 4 and the status display unit 2 via cables.

[0056] Understandably, since the current loop of the power track is fixed, the power status of the train can be determined by judging the current value in the power track, and the status display unit 2 can be controlled to output different alarm signals according to the different power status of the train.

[0057] In specific implementation, the status display unit 2 includes a buzzer and indicator lights. The operating frequency of the status display unit 2 (the loudspeaker volume and the flashing speed of the warning lights) is proportional to the detected current value in the power rail. For example, when the train passes over the power rail and is powered on, if the magnetic field strength signal is below a first threshold, the electromagnetic detection coil 4 can detect the DC magnetic field emitted by the power rail. The control unit 1 acquires the magnetic field strength signal to determine that the train is powered on and controls each status display unit 2 to connect to the first power supply so that the buzzer and indicator lights sound and flash at the first frequency. When the magnetic field strength signal is above the first threshold but below the second threshold, each status display unit 2 connects to the second power supply so that the buzzer and indicator lights operate at the second frequency. When the magnetic field strength signal is above the second threshold, each status display unit 2 connects to the third power supply so that the buzzer and indicator lights operate at the third frequency.

[0058] Furthermore, the track safety protection circuit provided in this application can also be used to detect changes in the power-on state of the train cars on the track. Since the resistance in the power track increases after the cars are powered on, the change in the power-on state of the train cars can be determined by the amount of decrease in current. Figure 1 As shown: When only one car in a 5-car train is energized, the current flowing through the power rail is 550A; when two cars are energized, the current flowing through the power rail is 1100A, and so on. At this time, the warning lights and loudspeakers in the area of ​​car 1 begin to flash and sound at a rate of level 2; the warning lights and loudspeakers in the area of ​​car 2 begin to flash and sound at a rate of level 1, and so on. In this way, the energization status of each car can be determined by the flashing and sounding rate and intensity, as well as whether the train's power consumption and the number of energized cars are increasing.

[0059] Based on the above embodiments, in order to ensure that the personnel inspecting the power track can detect the power status of the track in a timely manner, multiple alarm devices can be installed along the power track, and each status display unit 2 corresponds to the power track of each car.

[0060] Based on the above embodiments, in order to improve detection accuracy and prevent inaccurate judgment caused by the failure of electromagnetic detection coil 4, it is also necessary to set up an alarm unit and set up two electromagnetic detection coils 4 in the same detection area of ​​the power track.

[0061] The alarm unit is connected to the control unit 1 and is used to send an alarm to the management personnel when the control unit 1 detects that the difference in magnetic field strength signals of two electromagnetic detection coils 4 in the same detection area is greater than the detection threshold.

[0062] Furthermore, the alarm unit can be installed at the central control console of the maglev track or at the electromagnetic detection coil 4; there is no limitation here.

[0063] In practice, staff can quickly determine the power-on status of the power track through the information displayed on the status display unit 2. However, the staff's field of vision is limited, and they may not be able to see the display information at a distance, resulting in the staff not being able to grasp the power-on status of the power track in a timely manner, which may lead to danger. Therefore, in the solution provided in this application, the control unit 1 obtains the display information of each status display unit 2 by monitoring the status, and determines the power-on status of the power track based on the display information, generates track power-on information, and sends the track power-on information to a mobile terminal so that managers can view the power-on information through the mobile terminal. The mobile terminal can be a wearable device such as a mobile phone or a wristband, and the control unit 1 and the mobile terminal can be connected via WiFi or 5G communication protocols.

[0064] In addition, this application also provides a track safety protection system, which includes, in addition to the track safety protection circuit described above, a power supply, a communication unit, and a positioning unit for locating the fault area of ​​the electromagnetic detection coil.

[0065] The track safety protection system provided in this application includes the aforementioned track safety protection circuit, which comprises: a control unit, a status display unit, a monitoring unit, and at least one electromagnetic detection coil. Each electromagnetic detection coil is respectively positioned on both sides of the power track corresponding to each carriage to acquire the magnetic field strength signal of each power track. The status display unit is connected to the electromagnetic detection coil to determine the detection current value in the target power track corresponding to each electromagnetic detection coil based on the magnetic field strength signal, and generates a display signal based on the detection current value, allowing management personnel to determine whether any power track is energized. The monitoring unit collects the display signal and sends it to the control unit. The control unit generates track energization information based on the display signal and sends it to a mobile terminal, enabling management personnel to monitor the energization status of the entire track. Therefore, the technical solution provided in this application uses electromagnetic detection coils to determine the current value in the power track, preventing danger caused by operator error during energization. Simultaneously, the control unit can generate track energization information based on the display signal collected by the monitoring unit, allowing personnel to monitor the real-time energization status and trend of the entire track, thereby further improving safety.

[0066] The track safety protection circuit and system provided by this invention have been described in detail above. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

[0067] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A track safety protection circuit, characterized in that, The application relates to a track safety protection circuit. The track safety protection circuit comprises a control unit, a state display unit, a monitoring unit and at least two electromagnetic detection coils. Each electromagnetic detection coil is arranged on the two sides of a power track corresponding to each carriage to obtain a magnetic field intensity signal of each power track. The state display unit is connected with the electromagnetic detection coils to determine a detection current value in a target power track corresponding to each electromagnetic detection coil according to the magnetic field intensity signal and generate a display signal according to the detection current value. The monitoring unit is used for collecting the display signal and sending the display signal to the control unit. The control unit generates track electrification information according to the display signal and sends the track electrification information to a mobile terminal.

2. The track safety circuit of claim 1, wherein, The control unit is also used for detecting the electrification of a corresponding train carriage according to the current value of the power track and controlling the state display unit to output a corresponding alarm signal according to the electrification of the train carriage. The track electrification information comprises real-time electrification information and electrification trend information. Correspondingly, the control unit generates the track electrification information according to the display signal, which comprises the following steps: Obtaining the display signal and determining the level information of the display signal; Determining the real-time electrification information according to the level information, wherein the real-time electrification information comprises electrification carriage information and power cabinet current information; 3. The track safety circuit of claim 1, wherein, Determining the electrification trend information according to the real-time electrification information and the power consumption of the train. The detection current value is determined according to the magnetic field intensity signal, which comprises the following steps: Obtaining the magnetic field intensity signal; 4. The track safety circuit of claim 1, wherein, Determining the detection current value corresponding to the magnetic field intensity signal according to a preset magnetic field current corresponding relationship. The state display unit comprises a buzzer and an indicator light. When the magnetic field intensity signal is higher than a first threshold value and lower than a second threshold value, the buzzer and the indicator light work at a first frequency.

5. The track safety circuit of claim 4, wherein, When the magnetic field intensity signal is higher than the second threshold value, the buzzer and the indicator light work at a second frequency. The number of the state display units is plural.

6. The track safety circuit of claim 4, wherein, Each state display unit corresponds to the power track corresponding to each carriage. The monitoring unit comprises a camera and a sound pickup device.

7. The track safety circuit of claim 1, wherein, The camera and the sound pickup device are respectively used for collecting the signals of the indicator light and the buzzer so that the control unit obtains the working frequency of each state display unit.

8. The track safety circuit of claim 7, wherein, Two electromagnetic detection coils are arranged in a same detection area of the power track. The track safety protection circuit further comprises an alarm unit.

9. The rail safety protection circuit of claim 1, wherein, The alarm unit is connected with the control unit and is used for sending an alarm to a manager when the control unit detects that the difference between the magnetic field intensity signals of the two electromagnetic detection coils in the same detection area is greater than a detection threshold value.

10. A rail safety shield system characterized by, The control unit is connected with the mobile terminal through a WiFi communication protocol. The track safety protection circuit comprises any one of claims 1 to 9.

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