Railway crossing warning device and crossing comprehensive warning system

Abstract

The present application relates to the technical field of rail transit, and provides a wireless crossing warning device and a crossing comprehensive warning system, the wireless crossing warning device comprising: a wireless warning host and a first external interface connected with the wireless warning host, the first external interface being used for acquiring a wired warning signal of a wired crossing warning device and transmitting the wired warning signal to the wireless warning host, the wireless warning host being used for generating crossing warning information based on wireless warning information and the wired warning signal in the case that the wireless warning information is incomplete, the wired warning signal is a non-device fault warning signal, and the wireless warning information is incomplete, the case that the wireless warning information is incomplete including the case that a kilometer marker and / or a speed are missing. The present application can generate crossing warning information by combining the wireless warning information and the relatively accurate and stable wired warning signal, so that the crossing warning information is more accurate, and the warning can be made relatively stably.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to a wireless level crossing early warning device and a comprehensive level crossing early warning system. Background Technology

[0002] Railway crossings have always been a weak link in railway safety, with frequent accidents threatening people's lives and property. To ensure safety when a train approaches, necessary measures and equipment must be used to promptly notify people near the railway crossing to avoid the train.

[0003] Currently, railway crossing warning equipment is mainly divided into two categories: wired and wireless. However, these two types of equipment operate independently and cannot exchange information. When the wireless warning equipment malfunctions (e.g., incomplete warning information or interference from external sources), the warnings become inaccurate. Wired warning equipment, on the other hand, only provides a rough warning signal and cannot offer specific information (such as train number, distance, and duration). In short, neither existing wired nor wireless railway crossing warning equipment can reliably provide accurate warning information. Summary of the Invention

[0004] This invention provides a wireless level crossing early warning device and a comprehensive level crossing early warning system to solve the technical problem that neither existing wired nor wireless level crossing early warning devices can provide relatively stable and accurate early warning information.

[0005] This invention provides a wireless level crossing warning device, comprising: a wireless warning host and a first external interface connected to the wireless warning host. The first external interface is used to acquire a wired warning signal from a wired level crossing warning device and transmit the wired warning signal to the wireless warning host. The wireless warning host is used to generate level crossing warning information based on the wireless warning information and the wired warning signal when it receives wireless warning information and the wired warning signal, and the wireless warning information is incomplete and the wired warning signal is not a device fault warning signal. The incomplete wireless warning information includes situations where kilometer markers and / or speeds are missing.

[0006] According to the present invention, a wireless level crossing warning device is provided, wherein the wireless warning host is used to generate level crossing warning information based on the wired warning signal and the wireless warning information when a wired warning signal indicates that a train is approaching.

[0007] According to a wireless level crossing warning device provided by the present invention, when the wired warning signal received by the wireless warning host is an uplink approach warning signal or a downlink approach warning signal, and the kilometer marker is missing in the wireless warning information, the wireless warning host generates uplink and downlink warning information based on the uplink or downlink approach warning signal, generates level crossing warning information based on the uplink and downlink warning information and the wireless warning information, and sends the level crossing warning information to the display screen and speaker of the wireless level crossing warning device. The wireless warning host is also used to display the level crossing warning information in the uplink display area or downlink display area of ​​the display screen interface based on the uplink and downlink directions determined by the uplink and downlink warning information.

[0008] According to a wireless level crossing warning device provided by the present invention, when the wired warning signal received by the wireless warning host is an uplink approach warning signal or a downlink approach warning signal, and the wireless warning information includes a kilometer marker but lacks a speed, the wireless warning host determines a first uplink or downlink direction based on the kilometer marker, generates uplink or downlink warning information based on the uplink or downlink approach warning signal, generates level crossing warning information based on the uplink or downlink warning information and the wireless warning information, and sends the level crossing warning information to the display screen and speaker of the wireless level crossing warning device; the wireless warning host is also used to display the level crossing warning information in the corresponding uplink or downlink display area on the display screen interface based on a second uplink or downlink direction determined in the uplink or downlink warning information.

[0009] If the first up / down direction is consistent with the second up / down direction, the level crossing warning information shall include at least the distance; otherwise, the train number, distance, and duration shall all be empty in the level crossing warning information.

[0010] According to a wireless level crossing warning device provided by the present invention, when the wired warning signal received by the wireless warning host is a manual approach warning signal and the kilometer marker and / or speed are missing in the wireless warning information, the wireless warning host is used to generate train approach warning information based on the manual approach warning signal, generate level crossing warning information based on the train approach warning information and the wireless warning information, and send the level crossing warning information to the display screen and speaker of the wireless level crossing warning device, and display the level crossing warning information in both the up and down display areas of the display screen interface.

[0011] According to a wireless level crossing early warning device provided by the present invention, the wireless early warning host is further configured to generate the level crossing early warning information based on the received wireless early warning information when the received wired early warning signal is a device failure signal of the wired level crossing early warning device.

[0012] According to a wireless level crossing early warning device provided by the present invention, the wireless early warning host is further configured to generate the level crossing early warning information based on the complete wireless early warning information when it receives complete wireless early warning information and the kilometer marker in the wireless early warning information is located within the range of the center kilometer marker of the level crossing.

[0013] According to a wireless level crossing warning device provided by the present invention, the wireless warning host is further configured to generate the level crossing warning information based on the wired warning signal when the wired warning signal is received but no wireless warning information is received; or to determine that the wireless warning information is interference information when the wireless warning information is received but no wired warning signal is received.

[0014] The present invention also provides a comprehensive early warning system for level crossings, comprising: a wired level crossing early warning device and a wireless level crossing early warning device as described in any of the above claims, wherein the wired level crossing early warning device comprises: a wired early warning host and a second external interface connected to the wired early warning host.

[0015] The first external interface is connected to the second external interface via a signal line, and the second external interface sends the wired early warning signal obtained by the wired early warning host to the first external interface via the signal line.

[0016] According to the integrated early warning system for level crossings provided by the present invention, the second external interface includes: a common dry contact and multiple wired early warning signal dry contacts, each wired early warning signal dry contact being able to be switched on and off connected to the common dry contact; the first external interface includes: GPIO pins corresponding to each of the wired early warning signal dry contacts; the wireless early warning host includes multiple level signal detection circuits, each level signal detection circuit being connected to a GPIO pin.

[0017] The wireless level crossing early warning device and integrated level crossing early warning system provided by this invention include a first external interface in the wireless level crossing early warning device that connects to a wired level crossing early warning device. The wireless early warning host receives the wired early warning signal from the wired device and, if the received wireless early warning information is incomplete or the wired early warning signal is not a device fault warning signal, combines the wireless and wired early warning information to generate level crossing early warning information. Since the wired level crossing early warning device detects trains through sensors installed beside the track, the wired early warning signal has higher accuracy and reliability, is not susceptible to signal interference, and can be transmitted stably. Therefore, the level crossing early warning information combining the wireless and wired early warning signals is more accurate and can issue warnings more stably. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the wireless level crossing early warning device provided by the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the wired level crossing early warning device provided by the present invention.

[0021] Figure 3 This is a schematic diagram of the integrated early warning system for level crossings provided by the present invention.

[0022] Reference numerals: 100: Wireless level crossing early warning device; 101: Wireless early warning host; 102: First external interface; 103: Display screen; 104: Speaker; 105: Antenna feeder system; 106: Level crossing battery; 107: Storage unit; 200: Wired level crossing early warning device; 201: Wired early warning host; 202: Second external interface; 203: Track sensor; 204: Level crossing signal. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] The wireless level crossing early warning device of this invention, such as Figure 1As shown, the system includes a wireless early warning host 101 and a first external interface 102 connected to the wireless early warning host 101. The wireless level crossing early warning device also includes a display screen 103, a speaker 104, an antenna feeder system 105, a level crossing battery 106, and a storage unit 107. The level crossing battery 106 powers the wireless early warning host 101, display screen 103, speaker 104, and antenna feeder system 105. The antenna feeder system 105 receives wireless early warning information periodically sent by trains near the level crossing. The wireless early warning host 101 typically generates level crossing early warning information based on the wireless early warning information and displays it on the display screen 103. The speaker 104 broadcasts the level crossing early warning information, and the storage unit 107 stores the wireless early warning information and the level crossing early warning information. Specifically, the wireless early warning information includes: train number, kilometer marker, and speed (train speed). The level crossing early warning information includes: up / down information, train number, distance (real-time distance of the train from the level crossing), and duration (time taken for the train to reach the level crossing). The distance can be calculated based on the received kilometer markers and the kilometer marker at the level crossing's location, while the duration is calculated based on the distance and speed. The wireless early warning host 101 can determine the train's up / down direction based on the changing patterns of the kilometer markers: a decrease in the kilometer marker indicates an up / down direction, and an increase in the kilometer marker indicates a down / up direction.

[0025] In this embodiment, the first external interface 102 is used to acquire the wired warning signal from the wired level crossing warning device and transmit the wired warning signal to the wireless warning host 101. The wireless warning host 101 is used to generate level crossing warning information based on the wireless warning information and the wired warning signal when it receives both wireless warning information and the wired warning signal, and the wireless warning information is incomplete or the wired warning signal is not a device fault warning signal. The incomplete wireless warning information includes situations where kilometer markers and / or speeds are missing (i.e., missing kilometer markers, missing speeds, or both missing kilometer markers and speeds).

[0026] Because wireless level crossing warning devices are susceptible to signal interference, some data items in the received wireless warning information may be missing, such as kilometer markers and / or speed. For wireless warning information with missing data items, the level crossing warning information is generated by combining it with wired warning signals, making the final generated level crossing warning information more accurate.

[0027] It should be noted that more accurate level crossing warning information does not mean that every data item is completely and accurately warned. For missing data items, if neither the wired warning signal nor the wireless warning information can be recovered, there is no need to display or broadcast a warning for the missing data item to avoid false alarms. It is sufficient to ensure accurate warnings for the remaining data items as much as possible. For received wired warning signals, the wireless warning host 101 will also send the wired warning signal and wireless warning information to the storage unit 107 for storage in log form.

[0028] In this embodiment, the wireless level crossing warning device includes a first external interface 102 connected to the wired level crossing warning device. The wired warning signal from the wired device is acquired through this interface 102. The wireless warning host 101 receives the wired warning signal and, in cases where the received wireless warning information is incomplete or the wired warning signal is not a device fault warning signal, combines the wireless and wired warning information to generate level crossing warning information. Because the wired level crossing warning device detects trains using sensors installed beside the track, the wired warning signal has higher accuracy and reliability, is not subject to signal interference, and can be transmitted stably. Therefore, the level crossing warning information combining the wireless and wired warning information is more accurate and can issue warnings more stably.

[0029] In some embodiments, the wireless early warning host 101 is used to generate the level crossing early warning information based on the wired early warning signal and the wireless early warning information when a received wired early warning signal indicates that a train is approaching. Since the wireless level crossing early warning device only issues an early warning when a train is approaching the level crossing, the wireless early warning host 101 generates the level crossing early warning information based on the wired early warning signal and the wireless early warning information when a wired early warning signal indicates that a train is approaching, thus achieving the purpose of effective early warning.

[0030] In some embodiments, when the wired warning signal received by the wireless warning host 101 is an uplink approach warning signal or a downlink approach warning signal, and the kilometer markers are missing in the wireless warning information, the wireless warning host 101 generates uplink and downlink warning information (uplink warning information or downlink warning information) based on the uplink and downlink approach warning signal, generates the level crossing warning information based on the uplink and downlink warning information and the wireless warning information (it should be noted that: due to the missing kilometer markers, the distance and duration in the generated level crossing warning information are empty; if there is a train number, the train number is displayed; otherwise, the train number is also empty), sends the level crossing warning information to the display screen 103 and speaker 104 of the wireless level crossing warning device, and displays the level crossing warning information in the uplink display area or downlink display area on the display screen 103 interface.

[0031] For example, when the wireless early warning host 101 receives an upward approach warning signal, and the kilometer markers in the wireless early warning information are missing, it generates upward early warning information based on the upward approach warning signal. Combined with the wireless early warning information, it generates a level crossing warning message: Upward Approach, Train Number: "XXXXX" (displayed as "NULL" if the train number is also invalid), Distance: "NULL", Duration: "NULL". Because the kilometer markers are missing, the distance and duration in the generated level crossing warning message are both empty. However, the upward approach warning signal confirms that the train is approaching upwards. Therefore, the wireless early warning host 101 controls the speaker 104 to broadcast "Upward Approach" and displays the aforementioned level crossing warning message in the upward display area of ​​the display screen 103.

[0032] Since the kilometer markers and speeds in the periodically issued wireless warning messages from the train change with the train's movement and need to be acquired in real time, if the kilometer markers and / or speeds are missing, it indicates that the received wireless warning message may be interference information from adjacent lines, and therefore may be inconsistent with the actual warning information. In this case, the train's up and down directions are determined using more accurate wired warning signals, and then the level crossing warning information is generated by combining the data items that are not missing in the wireless warning message, making the level crossing warning information more accurate.

[0033] In some embodiments, when the wired warning signal received by the wireless warning host 101 is an uplink approach warning signal or a downlink approach warning signal, and the wireless warning information includes a kilometer marker but lacks a speed, the wireless warning host 101 determines a first uplink or downlink direction based on the kilometer marker, generates uplink or downlink warning information based on the uplink or downlink approach warning signal, generates the level crossing warning information based on the uplink or downlink warning information and the wireless warning information, and sends the level crossing warning information to the display screen and speaker of the wireless level crossing warning device.

[0034] The wireless early warning host 101 is also used to display the level crossing early warning information in the corresponding uplink or downlink display area on the display screen interface based on the second uplink or downlink direction determined in the uplink and downlink early warning information.

[0035] When the first up / down direction and the second up / down direction are consistent, the level crossing warning information shall include at least the distance; otherwise, the train number, distance, and duration in the level crossing warning information shall be empty. Specifically, the wireless warning host 101 is used to determine whether the first up / down direction and the second up / down direction are consistent. If they are consistent, the generated level crossing warning information includes: up / down approaching or down / up approaching, train number: "XXXXX" (valid or empty depending on the actual situation), distance: "XXXXX", duration: "NULL" (duration is empty due to missing speed data); if they are inconsistent, the generated level crossing warning information includes: up / down approaching or down / up approaching, train number: "NULL", distance: "NULL", duration: "NULL".

[0036] In this embodiment, the first up / down direction of the train is determined by the changing pattern of the kilometer markers in the wireless warning information. If the first up / down direction determined by the kilometer markers is consistent with the second up / down direction in the up / down warning information, it indicates that the received wireless warning information is issued by a train that is about to reach the target level crossing, and the kilometer markers are correct. Therefore, the train number is considered a valid train number. In this case, the level crossing warning information is: Upward approaching or Downward approaching, Train number "XXXXX", Distance: "XXXXX", Duration: "NULL". If the first up / down direction determined by the kilometer markers is inconsistent with the second up / down direction in the up / down warning information, it indicates that the received wireless warning information may come from a locomotive on an adjacent line near the level crossing, and is not a locomotive that is actually passing through the level crossing. Therefore, the level crossing warning information is: Upward approaching or Downward approaching, Train number "NULL", Distance: "NULL", Duration: "NULL".

[0037] In this embodiment, by verifying the uplink and downlink directions, the valid data items in the wireless early warning information can be further confirmed, thereby making the generated level crossing early warning information more accurate and achieving more accurate early warning.

[0038] In some embodiments, when the wired warning signal received by the wireless warning host 101 is a manual approach warning signal, and the kilometer markers and / or speeds are missing in the wireless warning information, the wireless warning host 101 is used to generate train approach warning information based on the manual approach warning signal, generate the level crossing warning information based on the train approach warning information and the wireless warning information, and send the level crossing warning information to the display screen and speaker of the wireless level crossing warning device, and display the level crossing warning information in both the up and down display areas of the display screen interface.

[0039] Specifically, after receiving a manual approach warning signal, the wireless early warning host 101 generates train approach warning information based on the manual approach warning signal, and combines it with the wireless warning information to generate level crossing warning information. This level crossing warning information is: Train Approaching, Train Number "XXXXX" (or "NULL" if the train number is also invalid), Distance: "NULL", Duration: "NULL". For example, if the kilometer marker is missing, the distance and duration in the generated level crossing warning information will be empty. This level crossing warning information is displayed in both the up and down display areas of the display screen 103, and the speaker 104 is controlled to announce "Train Approaching". In this embodiment, since the train's up and down directions cannot be determined, the level crossing warning information is displayed in both the up and down display areas of the display screen 103 to remind staff to pay attention to the train's direction.

[0040] In some embodiments, the wireless early warning host is further configured to generate the level crossing early warning information based on the received wireless early warning information when the received wired early warning signal is a device failure signal of the wired level crossing early warning device.

[0041] Specifically, since the wired level crossing warning equipment malfunctions, the wired warning signal cannot be used as a reference. Therefore, the level crossing warning information must be generated using wireless warning information. When the wireless warning host 101 receives the wireless warning information, it issues a warning according to the wireless warning information. Furthermore, when the wireless warning host 101 receives a fault warning signal from the wired level crossing warning equipment, it controls the speaker 104 to broadcast the fault information to remind relevant personnel to carry out inspection and maintenance.

[0042] In some embodiments, the wireless warning host 101 is further configured to generate the level crossing warning information based on the complete wireless warning information when it receives complete wireless warning information and the kilometer marker in the wireless warning information is located within the range of the center kilometer marker of the level crossing.

[0043] Specifically, since the wireless early warning host 101 receives complete wireless early warning information, i.e., warning information with valid train number, kilometer marker, and speed, and the range of the kilometer marker in the complete wireless early warning information is within the kilometer marker range of the level crossing center (e.g., within 3.5 kilometers of the level crossing center), it indicates that the complete wireless early warning information is issued by a locomotive approaching the level crossing. In this scenario, it is no longer necessary to rely on wired early warning signals to issue an early warning. The wireless early warning host 101 determines whether the train is approaching from the uphill or downhill direction based on the changing pattern of the kilometer marker in the complete wireless early warning information. For example, in the case of an uphill approach, the uphill display area on the display screen 103 shows: Uphill Approach, Train Number: "XXXXX", Distance: "XXX", Duration: "XXX", and controls the speaker 104 to broadcast "Uphill Approach".

[0044] In this embodiment, when the wireless early warning host 101 receives complete wireless early warning information, it considers the received wireless early warning information to be accurate and effective. It does not need to refer to the wired early warning signal, but directly issues an early warning, thus achieving fast and accurate early warning.

[0045] It should be noted that if only the train number is missing from the wireless warning information received by the wireless warning host 101, while the kilometer marker and speed are not missing, the wireless warning information can be considered complete. This is because the kilometer marker and speed are acquired in real time as the train moves. As long as both the kilometer marker and speed are present, it means that the wireless warning information sent by the train is valid. In this case, the following will be displayed in the up-line display area of ​​the display screen 103: Upward Approach, Train Number: "NULL", Distance: "XXX", Duration: "XXX".

[0046] In some embodiments, the wireless early warning host 101 is further configured to generate the level crossing early warning information based on the wired early warning signal when it receives the wired early warning signal but does not receive the wireless early warning information.

[0047] Specifically, the failure to receive wireless warning information may be due to the train's locomotive radio (LBJ) being out of power, malfunctioning, or the train having no locomotive radio. In this case, the level crossing warning information is generated only based on the wired warning signal. For example, when the wireless warning host 101 receives an upward approach warning signal or a downward approach warning signal (the locomotive is less than 2km from the level crossing), it generates upward and downward warning information (upward warning information or downward warning information). The speaker 104 is controlled to broadcast "upward approach" or "downward approach" according to the upward or downward warning information. The upward or downward display area of ​​the display screen 103 is displayed as: Upward approach or Downward approach, Train number: "NULL", Distance: "NULL", Duration: "NULL", and the upward or downward approach warning signal is stored.

[0048] For example, when the wireless warning host 101 receives a manual approach warning signal, it generates train approach warning information based on the manual approach warning signal, controls the speaker 104 to broadcast "train approaching" based on the train approach warning information, and displays "train approaching" in both the up and down display areas of the display screen 103 interface. The manual approach warning signal is also stored.

[0049] If the wireless warning information is received but no wired warning signal is received, the wireless warning information is determined to be interference information. Specifically, even if the wired level crossing warning equipment malfunctions, it will still send a fault warning signal to the wireless level crossing warning equipment. Therefore, if no wired warning signal is received but a wireless warning information is received, it indicates that the wireless warning information is interference information from vehicles on adjacent tracks at the level crossing, and no action is taken.

[0050] The integrated early warning system for level crossings provided by the present invention will be described below. The integrated early warning system for level crossings described below is an integrated system based on the wireless level crossing early warning device described above.

[0051] like Figure 2 and 3 As shown, the integrated level crossing early warning system of this invention includes: a wired level crossing early warning device 200 and a wireless level crossing early warning device 100 as described in the previous embodiment. The wired level crossing early warning device 200 includes: a wired early warning host 201 and a second external interface 202 connected to the wired early warning host 201. The wired level crossing early warning device 200 also includes: a track sensor 203 and two level crossing signals 204. The track sensor 203 is a magnetoelectric sensor that converts the speed of the train wheels into an induced electromotive force output in a coil, directly converting the mechanical energy of the wheel rim into an electrical signal output. It operates without an external power supply and is a passive sensor widely used in locomotive axle counting equipment, locomotive speed measuring equipment, and level crossing alarm equipment. The two level crossing signals 204 include two red signal lights, one white signal light, and a speaker. In standby mode, the white light is illuminated; in alarm mode, the two red signal lights illuminate alternately, and the speaker plays a train passing safety warning sound.

[0052] In this embodiment, the first external interface 102 is connected to the second external interface 202 via a signal line. The second external interface 202 transmits the wired early warning signal acquired by the wired early warning host 201 to the first external interface 102 via the signal line. Specifically, the wired early warning host 201 transmits the acquired wired early warning signal to the wireless early warning host 101 via the second external interface 202, the signal line, and the first external interface 102.

[0053] In this embodiment of the integrated level crossing early warning system, the wired level crossing early warning device 200 and the wireless level crossing early warning device 100 described in the previous embodiment are connected via an interface. The wireless early warning host 101 acquires the wired early warning signal from the wired level crossing early warning device through the first external interface 102 and the second external interface 202, and generates level crossing early warning information by combining it with the wireless early warning information sent by the train. Since the wired level crossing early warning device detects trains through sensors installed beside the track, the accuracy and reliability of the wired early warning signal are higher, and the wired early warning signal is not affected by signal interference and can be transmitted stably. Therefore, the level crossing early warning information combining the wireless early warning information and the wired early warning signal is more accurate and can issue warnings relatively stably.

[0054] In some embodiments, the second external interface 202 includes a common dry contact and multiple wired warning signal dry contacts, each of which is connectable to the common dry contact. The first external interface includes GPIO pins corresponding to each of the wired warning signal dry contacts. The wireless warning host includes multiple level signal detection circuits, each connected to a GPIO pin. The level signal detection circuits are used to detect high and low levels and can employ comparator circuits.

[0055] Dry contacts, as opposed to wet contacts, are non-energized, mechanical contacts, typically consisting of two or more metal contacts. When these contacts close or open, they indicate a switching state. Dry contacts transmit signals through physical separation or disconnection; when the contacts close, the circuit is connected; when the contacts open, the circuit is disconnected. This transmission method is independent of current or voltage, hence the name "dry" contact. They are commonly used to indicate the operating status, location information, or safety status of equipment.

[0056] In this embodiment, four signal dry contacts and one common dry contact can be set in the second external interface 202. Each signal dry contact and the common dry contact has a detection circuit for detecting the wired warning signal of the wired crossing warning device 200. There are four dry contact identification circuits on the interface board of the wireless warning host 101. Each circuit is connected to a GPIO pin of the first external interface 102. Different identification circuits identify four types of wired warning signals: "uplink approach warning signal", "downlink approach warning signal", "manual approach warning signal", and "device status signal (fault or normal)". See Tables 1 and 2 below for details.

[0057] Table 1. Names and meanings of dry contact points

[0058]

[0059] Table 2. Correspondence between dry contacts and GPIO pin detection

[0060]

[0061] In this embodiment, the wireless level crossing warning device 100 detects the wired warning signal of the wired level crossing warning device 200 through dry contacts, which can reliably detect the wired warning signal, and the interface circuit is simple to implement and low in cost.

[0062] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0063] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A comprehensive early warning system for level crossings, characterized in that, include: The system includes a wireless early warning host and a first external interface connected to the wireless early warning host. The first external interface is used to acquire wired early warning signals from wired level crossing early warning devices and transmit the wired early warning signals to the wireless early warning host. The wireless early warning host is used to generate level crossing early warning information based on the wireless early warning information and the wired early warning signals when it receives wireless early warning information and the wired early warning signals, and the wireless early warning information is incomplete or the wired early warning signals are not equipment fault early warning signals. The incomplete wireless early warning information includes situations where kilometer markers and / or speed indicators are missing. return The device includes a wired crossing early warning system, which comprises a wired early warning host and a second external interface connected to the wired early warning host. The first external interface is connected to the second external interface via a signal line, and the second external interface sends the wired early warning signal obtained by the wired early warning host to the first external interface via the signal line.

2. The integrated early warning system for level crossings according to claim 1, characterized in that, The wireless early warning host is used to generate the level crossing early warning information based on the wired early warning signal and the wireless early warning information when the received wired early warning signal indicates that a train is approaching.

3. The integrated early warning system for level crossings according to claim 2, characterized in that, When the wired warning signal received by the wireless warning host is an uplink approach warning signal or a downlink approach warning signal, and the kilometer marker is missing in the wireless warning information, the wireless warning host generates uplink and downlink warning information based on the uplink or downlink approach warning signal, generates the level crossing warning information based on the uplink and downlink warning information and the wireless warning information, and sends the level crossing warning information to the display screen and speaker of the wireless level crossing warning device. The wireless warning host is also used to display the level crossing warning information in the uplink display area or downlink display area on the display screen interface based on the uplink and downlink directions determined by the uplink and downlink warning information.

4. The integrated early warning system for level crossings according to claim 2, characterized in that, When the wired warning signal received by the wireless warning host is an uplink approach warning signal or a downlink approach warning signal, and the wireless warning information includes kilometer markers but lacks speed, the wireless warning host determines a first uplink or downlink direction based on the kilometer markers, generates uplink or downlink warning information based on the uplink or downlink approach warning signal, generates the level crossing warning information based on the uplink or downlink warning information and the wireless warning information, and sends the level crossing warning information to the display screen and speaker of the wireless level crossing warning device; the wireless warning host is also used to display the level crossing warning information in the corresponding uplink or downlink display area on the display screen interface based on the second uplink or downlink direction determined in the uplink or downlink warning information. If the first up / down direction is consistent with the second up / down direction, the level crossing warning information shall include at least the distance; otherwise, the train number, distance, and duration shall all be empty in the level crossing warning information.

5. A comprehensive early warning system for level crossings according to claim 2, characterized in that, When the wired warning signal received by the wireless warning host is a manual approach warning signal, and the kilometer markers and / or speeds are missing in the wireless warning information, the wireless warning host generates train approach warning information based on the manual approach warning signal, generates level crossing warning information based on the train approach warning information and the wireless warning information, and sends the level crossing warning information to the display screen and speaker of the wireless level crossing warning device, and displays the level crossing warning information in both the up and down display areas of the display screen interface.

6. A comprehensive early warning system for level crossings according to any one of claims 1 to 5, characterized in that, The wireless early warning host is also used to generate the crossing early warning information based on the received wireless early warning information when the received wired early warning signal is a fault signal of the wired crossing early warning device.

7. A comprehensive early warning system for level crossings according to any one of claims 1 to 5, characterized in that, The wireless early warning host is also used to generate the level crossing early warning information based on the complete wireless early warning information when it receives complete wireless early warning information and the kilometer marker in the wireless early warning information is within the range of the center kilometer marker of the level crossing.

8. A comprehensive early warning system for level crossings according to any one of claims 1 to 5, characterized in that, The wireless early warning host is also used to generate the level crossing early warning information based on the wired early warning signal when it receives the wired early warning signal but does not receive the wireless early warning information; or to determine that the wireless early warning information is interference information when it receives the wireless early warning information but does not receive the wired early warning signal.

9. A comprehensive early warning system for level crossings according to claim 1, characterized in that, The second external interface includes a common dry contact and multiple wired warning signal dry contacts. Each wired warning signal dry contact can be switched on and off to connect to the common dry contact. The first external interface includes GPIO pins corresponding to each of the wired warning signal dry contacts. The wireless warning host includes multiple level signal detection circuits, and each level signal detection circuit is connected to a GPIO pin.

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