CN114460833A - Driving device and time service method thereof, ground signal device and time service system - Google Patents
Driving device and time service method thereof, ground signal device and time service system Download PDFInfo
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- CN114460833A CN114460833A CN202210078506.9A CN202210078506A CN114460833A CN 114460833 A CN114460833 A CN 114460833A CN 202210078506 A CN202210078506 A CN 202210078506A CN 114460833 A CN114460833 A CN 114460833A
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention provides a time service method and system of driving equipment and the driving equipment, and relates to the technical field of communication. The time service method of the driving device comprises the following steps: judging whether the driving equipment is in a time service abnormal state or not; if the driving equipment is in an abnormal time service state, acquiring a ground time signal sent by target ground signal equipment in wireless communication connection with the driving equipment, wherein the ground time signal is a satellite time signal sent by a satellite navigation system and received by the target ground signal equipment; and the ground time signal is used as a time service source to carry out vehicle-mounted equipment time service on the driving equipment. In the invention, the time error of the driving equipment is controlled at nanosecond level by combining the satellite navigation system and the ground signal equipment, thereby ensuring the time service precision of the driving equipment under the condition of abnormal time service.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a time service method and system of driving equipment and the driving equipment.
Background
The BeiDou Navigation Satellite System (BDS for short) is a global Navigation Satellite System developed by china, and is also the third mature Satellite Navigation System behind the global Navigation Satellite System (GPS) and GLONASS Satellite Navigation systems. The Beidou satellite navigation system can provide high-precision, high-reliability positioning, navigation and time service for various users all day long in the global range, has short message communication capacity and initially has regional navigation, positioning and time service capacity.
In a rail transit train, time service and time synchronization in the running process of the train are very important, and the method is a key for carrying out intelligent operation and maintenance management and control on the train and ensuring the safe and stable running of the train. Furthermore, with the development of the unmanned technology, the time service and the time synchronization of the unmanned equipment have very important meanings.
However, when a train or a vehicle enters a non-open space (for example, a station, a tunnel, etc.) or is interfered by other signals, a satellite time signal received by the train or the vehicle and sent by the beidou satellite navigation system is discontinuous, inaccurate, or even unable to receive the signal, so that time service and time synchronization of the train or the vehicle in the operation process are affected, and the operation safety of the train or the vehicle is affected.
Disclosure of Invention
The invention aims to provide a time service method and system of a driving device and the driving device, wherein the time error of the driving device is controlled to be at a nanosecond level by combining a satellite navigation system and a ground signal device, so that the time service precision of the driving device under the condition of abnormal time service is ensured.
In order to achieve the aim, the invention provides a time service method of a driving device, which comprises the following steps: judging whether the driving equipment is in a time service abnormal state or not; if the driving equipment is in an abnormal time service state, acquiring a ground time signal sent by target ground signal equipment in wireless communication connection with the driving equipment, wherein the ground time signal is a satellite time signal sent by a satellite navigation system and received by the target ground signal equipment; and the ground time signal is used as a time service source to carry out vehicle-mounted equipment time service on the driving equipment.
The present invention also provides a driving apparatus including: the system comprises a mother clock device, a vehicle-mounted signal device and a vehicle-mounted satellite communication device which are connected with each other; the vehicle-mounted satellite communication equipment is used for receiving a satellite time signal sent by a satellite navigation system; the vehicle-mounted signal equipment is used for judging whether the driving equipment is in an abnormal time service state or not; the vehicle-mounted signal equipment is used for acquiring a ground time signal sent by target ground signal equipment in wireless communication connection with the driving equipment when the driving equipment is in an abnormal time service state, wherein the ground time signal is a satellite time signal sent by a satellite navigation system and received by the target ground signal equipment, and the ground time signal is sent to the mother clock equipment; the mother clock device is used for carrying out vehicle-mounted device time service on the driving device by taking the ground time signal as a time service source.
The present invention also provides a ground signal apparatus, comprising: the signal processing equipment and the ground satellite communication equipment are connected with each other; the signal processing equipment is in wireless communication connection with the driving equipment; the ground satellite communication equipment is used for receiving a satellite time signal sent by a satellite navigation system; the signal processing device is used for sending a received satellite time signal sent by a satellite navigation system to the driving device as a ground time signal when receiving a time obtaining request sent by the driving device when the driving device is in a time service abnormal state, so that the driving device can carry out vehicle-mounted device time service on the driving device by taking the ground time signal as a time service source.
The invention also provides a time service system, comprising: at least one of the above-mentioned steering devices and at least one of the above-mentioned ground signal devices.
In the implementation of the invention, when the reliability of the time service source of the driving equipment is low, a ground signal device in communication connection with the driving equipment is used for obtaining a more reliable time service source to time service the vehicle-mounted equipment in the driving equipment, and the time error of the driving equipment is controlled to be at a nanosecond level by combining the satellite navigation system and the ground signal device, so that the time service precision of the driving equipment under the condition of abnormal time service is ensured, namely the time accuracy of the driving equipment is ensured, the safety level of the operation control of the driving equipment is improved, and the safe and stable operation of the driving equipment is ensured.
In one embodiment, the determining whether the driving device is in the time service abnormal state includes: and determining whether the driving equipment is in an abnormal time service state or not according to the received positioning information sent by the target ground signal equipment in wireless connection with the driving equipment, wherein the positioning information is used for representing the position of the target ground signal equipment.
In one embodiment, the determining whether the driving device is in an abnormal time service state according to the received positioning information sent by the target ground signal device wirelessly connected with the driving device includes: judging whether the positioning information sent by the target ground signal equipment is located in a preset position information base or not; and if the positioning information sent by the target ground signal equipment is located in a preset position information base, determining that the driving equipment is in a time service abnormal state.
In one embodiment, when it is determined that the driving device is in a time service abnormal state and before the ground time signal sent by the target ground signal device is acquired, the method further includes: generating a master clock time signal by the master clock equipment within a preset time to serve as a time service source for carrying out time service on the vehicle-mounted equipment by the driving equipment; and if the driving equipment is still in the time service abnormal state after the preset time, entering the step of acquiring the ground time signal sent by the target ground signal equipment.
In one embodiment, after the vehicle-mounted device time service is performed on the driving device by using the ground time signal as a time service source, the method further includes: and if the driving equipment recovers the normal time service state, the received satellite time signal sent by the satellite navigation system is taken as a time service source to carry out vehicle-mounted equipment time service on the driving equipment.
In one embodiment, the location information base includes: at least one location information for indicating a non-open space.
In one embodiment, the vehicle-mounted signal device is used for determining whether the driving device is in an abnormal time service state according to received positioning information sent by a target ground signal device wirelessly connected with the driving device, wherein the positioning information is used for representing the position of the target ground signal device.
In one embodiment, the in-vehicle signal apparatus includes: the vehicle-mounted controller, the point type information receiving module and the vehicle-mounted communication module are connected with each other; the vehicle-mounted controller is in communication connection with the vehicle-mounted satellite communication equipment and the mother clock equipment respectively; the driving equipment is wirelessly connected with ground signal equipment through the vehicle-mounted communication module; the vehicle-mounted controller is used for acquiring positioning information sent by the target ground signal equipment through the point type information receiving module; the vehicle-mounted controller is used for judging whether the positioning information sent by the target ground signal equipment is located in a preset position information base or not, and determining that the driving equipment is in a time service abnormal state when the positioning information sent by the target ground signal equipment is judged to be located in the preset position information base.
In one embodiment, the mother clock device comprises: the device comprises an input unit, a punctuality unit and an output unit which are connected in sequence; the vehicle-mounted signal equipment 2 is connected to the input unit; the time keeping unit is used for carrying out vehicle-mounted equipment time service on the driving equipment by taking the ground time signal as a time service source; the time keeping unit is also used for generating a master clock time signal; the vehicle-mounted signal equipment is also used for controlling the time keeping unit to carry out vehicle-mounted equipment time service on the driving equipment by taking the mother clock time signal as a time service source within preset time; the vehicle-mounted signal equipment is further used for acquiring a ground time signal sent by the target ground signal equipment when the driving equipment is still in a time service abnormal state after the preset time.
In one embodiment, the vehicle-mounted signal device is further configured to send a satellite time signal received through the vehicle-mounted satellite communication device to the mother clock device when the driving device recovers the normal time service state; the mother clock equipment is used for carrying out time service on the vehicle-mounted equipment by taking a satellite time signal sent by a satellite navigation system as a time service source.
In one embodiment, the location information base includes: at least one location information for indicating a non-open space.
In one embodiment, the signal processing apparatus includes: the wireless block controller, the ground communication module and the point type information sending module are connected with each other; the ground signal device is in wireless communication connection with the driving device through the ground communication module; the point type information sending module is used for sending the positioning information used for representing the position of the ground signal equipment to the driving equipment so that the driving equipment can determine whether the driving equipment is in a time service abnormal state or not according to the received positioning information; the infinite occlusion controller is used for sending the ground time signal to the driving equipment through the ground communication module.
Drawings
Fig. 1 is a detailed flowchart of a time service method of a driving apparatus according to a first embodiment of the invention;
FIG. 2 is a detailed flowchart of a time service method of a driving device according to a second embodiment of the invention;
FIG. 3 is a flowchart illustrating a timing method of a driving apparatus according to a third embodiment of the present invention;
FIG. 4 is a schematic diagram of the connection of a steering device, a ground signal device and a satellite navigation system according to a fourth embodiment of the present invention;
fig. 5 is a block schematic diagram of a driving apparatus according to a fourth embodiment of the present invention;
fig. 6 is a block schematic diagram of a driving apparatus according to a fifth embodiment of the present invention;
fig. 7 is a block schematic diagram of a driving apparatus according to a sixth embodiment of the invention;
FIG. 8 is a block schematic diagram of a surface signaling device in accordance with a seventh embodiment of the present invention;
fig. 9 is a block schematic diagram of a surface signaling apparatus in an eighth embodiment in accordance with the invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.
Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "or/and" unless the context clearly dictates otherwise.
In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.
A first embodiment of the present invention relates to a time service method for a driving device, which is used for time service for an on-board device of the driving device, such as a motor train unit train, a rail transit train, a vehicle (a fuel-powered vehicle, a new energy vehicle, a hybrid vehicle, etc.). In the embodiment and the following embodiments, the driving device is taken as an example of a motor train unit train.
Fig. 1 shows a specific flow of a time service method of a driving apparatus according to the present embodiment.
And step 101, judging whether the driving equipment is in an abnormal time service state or not. If yes, go to step 102; if not, go to step 104.
Specifically, during the operation of the train, the train communicates with a satellite navigation system through a vehicle-mounted satellite communication device, a satellite time signal sent by the satellite navigation system (such as a Beidou satellite navigation system, a GPS satellite navigation system or a space-based satellite navigation system) is received in real time, the satellite time signal is used as a time service source of a master clock device of the train, the master clock device services time to the vehicle-mounted devices in the train, and time synchronization among the vehicle-mounted devices in the train is achieved.
When a train passes through non-open spaces such as stations and tunnels, communication connection between the train and a satellite navigation system is interfered, so that satellite time signals are interrupted or even cannot be received.
Specifically, the ground signal devices may be trackside devices arranged on a train travel route, the ground signal devices may be arranged in intervals according to the train travel route, and the ground signal devices are generally arranged in an open space such as a station or a tunnel. When a train approaches, the ground signal equipment can be connected with the train through wireless communication network (Global System for Mobile Communications-Railway, GSM-R) for Railway communication and application.
The ground signal device can communicate with a satellite navigation system through a ground satellite communication device, receive a satellite time signal sent by the satellite navigation system (such as a Beidou satellite navigation system, a GPS satellite navigation system or a space-based satellite navigation system) in real time, and complete time service of the ground device by taking the satellite time signal as a time service source, so that time synchronization among devices such as a ground train operation control system, the devices and a vehicle scheduling management device is realized.
When the train is in an abnormal time service state, a time acquisition request is sent to target ground signal equipment which is in communication connection with the train at present, and when the target ground signal equipment receives the time acquisition request sent by the train, the satellite time signal sent by a satellite navigation system and received by the target ground signal equipment is accurate, so that the target ground signal equipment sends the received satellite time signal to the train as a ground time signal, and the train sends the received ground time signal to mother clock equipment as a time service source.
And 103, carrying out vehicle-mounted equipment time service on the driving equipment by taking the ground time signal as a time service source.
Specifically, the master clock device of the train time-service the on-board devices in the train using the ground time signal from the target ground signal device as a time-service source, thereby achieving time synchronization between the on-board devices in the train. The ground time signal is the satellite time signal received by the target ground signal equipment, so that the train is equivalent to using the satellite time signal sent by the satellite navigation system as a time service source to carry out normal time service on the vehicle-mounted equipment of the train, and the time service precision of the train is ensured.
In this embodiment, the train continuously determines whether the train is in the abnormal time service state during the operation process, and when the train exits the abnormal time service state, the train uses the received satellite time signal sent by the satellite navigation system as the time service source to perform the time service on the vehicle-mounted equipment for the train.
And step 104, using the received satellite time signal sent by the satellite navigation system as a time service source to carry out time service on the vehicle-mounted equipment for the driving equipment.
Specifically, when the train is in a normal time service state, that is, the received satellite time signal is in a normal state, the master clock device of the train uses the satellite time signal as a time service source to provide time service to the on-board devices, and time synchronization between the on-board devices in the train is achieved.
The embodiment provides a time service method for a driving device, wherein when the driving device is in an abnormal time service state, the driving device acquires a ground time signal sent by a target ground signal device in wireless communication connection with the driving device, the ground time signal is a satellite time signal sent by a satellite navigation system and received by the target ground signal device, and then the ground time signal is used as a time service source to carry out vehicle-mounted device time service on the driving device. When the reliability of the time service source of the driving equipment is low, a more reliable time service source is obtained through the ground signal equipment in communication connection with the driving equipment to carry out time service on the vehicle-mounted equipment in the driving equipment, the time error of the driving equipment is controlled to be at a nanosecond level by utilizing a mode of combining a satellite navigation system and the ground signal equipment, the time service precision of the driving equipment under the condition of abnormal time service is ensured, namely the accuracy of the time of the driving equipment is ensured, the safety level of the operation control of the driving equipment is improved, and the safe and stable operation of the driving equipment is ensured.
A second embodiment of the present invention relates to a time service method for a driving device, and the present embodiment is, in comparison with the first embodiment: the embodiment provides a specific implementation manner for judging whether the driving equipment is in the abnormal time service state.
Fig. 2 shows a specific flow of the time service method of the driving device according to the present embodiment.
In one example, determining whether the driving device is in the abnormal time service state according to the received positioning information sent by the target ground signal device wirelessly connected with the driving device comprises the following steps: judging whether the positioning information sent by the target ground signal equipment is located in a preset position information base or not; if the positioning information sent by the target ground signal equipment is located in a preset position information base, determining that the driving equipment is in a time service abnormal state; and if the positioning information sent by the target ground signal equipment is not in the preset position information base, determining that the driving equipment is not in the time service abnormal state.
Specifically, each ground signal device is preset with its own positioning information, and the positioning information is used for indicating the position of the ground signal device; the positioning information is, for example, latitude and longitude coordinates of the ground signal device.
When the train is in wireless communication connection with the target ground signal equipment, the target ground signal equipment sends self positioning information to the train, the positioning information is the current position of the train, a position information base is preset in the train, the position information base comprises at least one piece of position information which interferes with satellite time signals sent by a satellite navigation system and received by the train, and the position information base is equivalent to a digital map formed in the train; the train compares the received positioning information with the position information of the position information base, when the positioning information is located in the position information base, the positioning information is located on a digital map, the position of the train is judged to generate interference on a satellite time signal received by the train, the satellite time signal received by the train is inaccurate, the train is judged to be in an abnormal timing state at the moment, the steps 202 and 203 are carried out, a ground time signal sent by target ground signal equipment in wireless communication connection with driving equipment is obtained, and the ground time signal is used as a timing source to carry out vehicle-mounted equipment timing on the driving equipment. In one example, the location information base includes: at least one location information for indicating a non-open space; the non-open space is, for example, a station, a tunnel, or the like.
If the positioning information is not in the position information base, the train is determined to be in a time service normal state, and the process proceeds to step 204, and the vehicle-mounted equipment time service is performed on the driving equipment by taking the received satellite time signal sent by the satellite navigation system as a time service source.
In the embodiment, in the running process of the train, whether the driving equipment is in an abnormal time service state or not is determined continuously according to the received positioning information sent by the target ground signal equipment wirelessly connected with the driving equipment; when the train leaves the current position, the train is judged to be in a normal timing state, and the train takes the received satellite time signal sent by the satellite navigation system as a timing source to perform vehicle-mounted equipment timing on the driving equipment.
And step 203, using the ground time signal as a time service source to time service the vehicle-mounted equipment to the driving equipment. This step is substantially the same as step 103 in the first embodiment, and will not be described herein again.
And step 204, using the received satellite time signal sent by the satellite navigation system as a time service source to carry out time service on the vehicle-mounted equipment for the driving equipment. This step is substantially the same as step 104 in the first embodiment, and will not be described herein again.
In the embodiment, whether the driving equipment is in the abnormal time service state or not is determined according to the received positioning information sent by the target ground signal equipment wirelessly connected with the driving equipment, whether the driving equipment is in the abnormal time service state or not can be judged more timely and accurately, then, the reliable time service source can be obtained more timely to service time to the vehicle-mounted equipment, and the time service precision of the driving equipment under the abnormal time service condition is further ensured.
A third embodiment of the present invention relates to a time service method for a driving device, and compared with the first embodiment, the present embodiment is mainly improved in that: in the embodiment, when the train has an abnormal time service condition, the mother clock device is firstly used for generating a mother clock time signal to serve as a time service source to carry out time service on the vehicle-mounted device on the driving device.
Fig. 3 shows a specific flow of the time service method of the driving device according to the present embodiment.
And step 301, judging whether the driving equipment is in an abnormal time service state or not. If yes, go to step 302; if not, go to step 306. Substantially the same as step 101 in the first embodiment, and will not be described herein again.
And step 302, generating a master clock time signal by the master clock device within a preset time to serve as a time service source for carrying out time service on the vehicle-mounted device on the driving device.
And 303, judging whether the driving equipment is in an abnormal time service state after the preset time. If yes, go to step 304; if not, go to step 306.
Specifically, when the train is in an abnormal timing state, timing is started, the master clock device of the train generates a master clock time signal meeting a preset precision requirement in the timing process, and the master clock time signal is used as a timing source to time the on-board devices in the train, so that time synchronization among the on-board devices in the train is realized.
After the timing reaches the preset time, whether the train is still in the abnormal time service state is judged, if the train is still in the abnormal time service state, the method goes to the step 304 and the step 305, the ground time signal sent by the target ground signal equipment in wireless communication connection with the driving equipment is obtained, and the ground time signal is used as the time service source to carry out vehicle-mounted equipment time service on the driving equipment. If the train recovers the normal time service state, namely the train receives the satellite time signal reliably, the train uses the received satellite time signal sent by the satellite navigation system as a time service source to carry out vehicle-mounted equipment time service on the driving equipment.
And 305, carrying out vehicle-mounted equipment time service on the driving equipment by taking the ground time signal as a time service source. This step is substantially the same as step 103 in the first embodiment, and will not be described herein again.
And step 306, using the received satellite time signal sent by the satellite navigation system as a time service source to carry out time service on the vehicle-mounted equipment for the driving equipment. Substantially the same as step 104 in the first embodiment, and will not be described herein again.
In the embodiment, when the driving equipment is in the abnormal time service state, the mother clock time signal generated by the mother clock equipment is used as the time service source to time the driving equipment for the vehicle-mounted equipment, namely, when the duration time of the abnormal time service state of the driving equipment is short, the mother clock signal generated by the mother clock equipment of the driving equipment is used as the time service source to time the vehicle-mounted equipment, so that the influence of errors caused by Doppler effect on the driving equipment moving at high speed is avoided. In addition, if the time of the driving equipment in the abnormal time service state exceeds a set time threshold, methods such as speed reduction control measures and automatic frequency selection control algorithms need to be adopted to eliminate and compensate errors so as to ensure the time service precision of the driving equipment.
A fourth embodiment of the present invention relates to a driving apparatus such as a train of a motor train unit, a rail transit train, a vehicle (a fuel-powered vehicle, a new energy vehicle, a hybrid vehicle) or the like.
Referring to fig. 4 and 5, the driving apparatus 100 includes: the system comprises a mother clock device 1, a vehicle-mounted signal device 2 and a vehicle-mounted satellite communication device 3 which are connected with one another, wherein the connection mode can be wired or wireless; the driving device 100 is in wireless communication connection with the ground signal device 200 through the vehicle-mounted signal device 2, specifically, in a wireless communication network (Global System for Mobile Communications-Railway, GSM-R) for Railway communication and application. It should be noted that, in this embodiment, only the devices in the driving device 100 required by the present invention are shown, and the driving device 100 may further include other devices, for example, a speed measurement module for measuring and recording a driving speed of the driving device 100, an operation management recording unit for recording a time service abnormal condition of the driving device 100, a device maintenance recording unit for recording maintenance information of the driving device 100, and the like, which are not described herein any more.
The in-vehicle satellite communication device 3 is used to receive a satellite time signal transmitted from the satellite navigation system 300. Specifically, the vehicle-mounted satellite communication device 3 is a satellite receiver, and the driving device 100 is in communication connection with a satellite navigation system 300 (for example, a beidou satellite navigation system, a GPS satellite navigation system, or a space-based satellite navigation system) through the vehicle-mounted satellite communication device 3, and receives a satellite time signal through the vehicle-mounted satellite communication device 3.
The in-vehicle signal device 2 is used to determine whether the driving device 100 is in an abnormal time service state. Specifically, when the driving device 100 passes through a station, a tunnel, or other non-open space, the communication connection between the driving device 100 and the satellite navigation system 300 may be interfered, which may cause the satellite time signal to be interrupted or even not received, and when the driving device 100 may be continuously turned on or off for multiple times or continuously receive the satellite time signal for a certain time, the satellite time signal received by the driving device 100 is inaccurate, and the driving device 100 is in an abnormal time service state. If the driving device 100 is in the time service normal state, it indicates that the satellite time signal is in the normal state, and the driving device 100 uses the satellite time signal as the time service source of the mother clock device 1 to provide time service to the on-board devices in the driving device 100, so as to realize time synchronization between the on-board devices in the driving device 100.
The on-vehicle signal device 2 is configured to, when the driving device 100 is in the time service abnormal state, acquire a ground time signal transmitted by the target ground signal device 200 wirelessly connected to the driving device 100, where the ground time signal is a satellite time signal transmitted by the satellite navigation system 300 and received by the target ground signal device 200, and transmit the ground time signal to the mother clock device 1. Taking the driving device 100 as a train as an example, the ground signal device 200 may be a trackside device arranged on a train running path, the ground signal device 200 may be arranged in intervals according to the train running path, and the ground signal device 200 is generally arranged in a non-open space such as a station and a tunnel. When a train approaches, the ground signal device 100 may be wirelessly communicatively coupled to the train via the wireless communication network of the GSM-R.
When the driving device 100 is in an abnormal time service state, it sends a time acquisition request to the target ground signal device 200 which is currently in communication connection with the driving device, and when the target ground signal device 200 receives the time acquisition request sent by the driving device 100, the satellite time signal sent by the satellite navigation system received by the target ground signal device 200 is accurate, so that the target ground signal device 200 sends the received satellite time signal to the driving device 100 as a ground time signal, and the driving device 100 sends the received ground time signal to the mother clock device 1 as a time service source.
The master clock device 1 is used for carrying out vehicle-mounted device time service on the driving device by taking a ground time signal as a time service source. The master clock device 1 is a high-stability crystal clock built in the driving device 100, is a core of a time service system of the driving device 100, and is used for time service of the vehicle-mounted device by a time service source set by the vehicle-mounted signal device 2. When the driving device 100 is in a normal time service state, the mother clock device 1 uses a satellite time signal sent by a satellite navigation system as a time service source to provide time service for the vehicle-mounted device; when the driving device 100 is in the abnormal time transfer state, the mother clock device 1 transfers time to the in-vehicle device by using the received ground time signal transmitted from the target ground signal device 200 as a time transfer source.
In this embodiment, the driving device 100 continuously determines whether the driving device 100 is in the abnormal time service state during the operation, and when the train exits the abnormal time service state, the mother clock device 1 uses the received satellite time signal sent by the satellite navigation system 300 as the time service source to time the vehicle-mounted device of the driving device 100.
The embodiment provides a driving device, where when the driving device is in an abnormal time service state, the driving device obtains a ground time signal sent by a target ground signal device in wireless communication connection with the driving device, where the ground time signal is a satellite time signal sent by a satellite navigation system and received by the target ground signal device, and then uses the ground time signal as a time service source to perform on-board device time service on the driving device. When the reliability of the time service source of the driving equipment is low, a more reliable time service source is obtained through the ground signal equipment in communication connection with the driving equipment to carry out time service on the vehicle-mounted equipment in the driving equipment, the time error of the driving equipment is controlled to be at a nanosecond level by utilizing a mode of combining a satellite navigation system and the ground signal equipment, the time service precision of the driving equipment under the condition of abnormal time service is ensured, namely the accuracy of the time of the driving equipment is ensured, the safety level of the operation control of the driving equipment is improved, and the safe and stable operation of the driving equipment is ensured.
A fifth embodiment of the present invention relates to a driving apparatus, and the present embodiment is relative to the fourth embodiment: the embodiment provides a specific implementation manner for judging whether the driving equipment is in the abnormal time service state.
In this embodiment, the vehicle-mounted signal device 2 is configured to determine whether the driving device 100 is in the abnormal time service state according to the received positioning information sent by the target ground signal device 200 wirelessly connected to the driving device 100, where the positioning information is used to represent the position of the target ground signal device 200.
In one example, referring to fig. 6, the in-vehicle signal apparatus 2 includes: the vehicle-mounted controller 21, the point type information receiving module 22 and the vehicle-mounted communication module 23 are connected with each other; the vehicle-mounted controller 21 is respectively in communication connection with the vehicle-mounted satellite communication equipment 3 and the mother clock equipment 1; the driving apparatus 100 is wirelessly connected with the ground signal apparatus 200 through the in-vehicle communication module 23.
The vehicle-mounted controller 21 is configured to obtain the positioning information sent by the target ground signal device 200 through the point information receiving module 22. Specifically, each ground signal device 200 is preset with its own positioning information, which is used to indicate the position of the ground signal device; the positioning information is, for example, latitude and longitude coordinates of the ground signal device.
After the target ground signal device 200 is in wireless communication connection with the driving device 100, the point information receiving module 22 of the driving device 100 receives the positioning information of the target ground signal device 200 through the vehicle-mounted communication module 23, and the point information receiving module 22 sends the positioning information to the vehicle-mounted controller 21.
The onboard controller 21 is configured to determine whether the positioning information sent by the target ground signal device 200 is located in a preset location information base, and determine that the driving device 100 is in an abnormal time service state when it is determined that the positioning information sent by the target ground signal device 200 is located in the preset location information base.
The positioning information received by the onboard controller 21 is that the driving device 100 is located at the current position, the onboard controller 21 reads a preset position information base in the storage device, the position information base comprises at least one piece of position information which interferes with a satellite time signal sent by a satellite navigation system and received by the driving device 100, and the position information base is equivalent to a digital map formed in the driving device 100; the on-board controller 21 compares the received positioning information with the position information of the position information base, when the positioning information is located in the position information base, it is indicated that the positioning information is located on the digital map, it is determined that the position of the driving device 100 interferes with the satellite time signal received by the driving device 100, so that the satellite time signal received by the driving device 100 is inaccurate, and at this time, it is determined that the driving device 100 is in a time service abnormal state, the on-board controller 21 acquires the ground time signal sent by the target ground signal device 200 in wireless communication connection with the driving device, and uses the ground time signal as a time service source to perform on-board device time service on the driving device 100. In one example, the location information base includes: at least one location information for indicating a non-open space; the non-open space is, for example, a station, a tunnel, or the like.
When it is determined that the positioning information is not in the position information base, the in-vehicle controller 21 determines that the driving device 100 is in the time service normal state, and the mother clock device 1 time-services the driving device 100 with the received satellite time signal transmitted from the satellite navigation system 300 as a time service source.
In this embodiment, in the operation process, the driving device 100 may continuously determine whether the driving device 100 is in an abnormal time service state according to the received positioning information sent by the target ground signal device 200 wirelessly connected to the driving device 100; when the driving device 100 is away from the current position, it is determined that the driving device 100 is in the normal time service state, and the mother clock device 1 of the driving device 100 performs the in-vehicle device time service to the driving device 100 again using the received satellite time signal transmitted from the satellite navigation system 300 as the time service source.
A sixth embodiment of the present invention relates to a driving apparatus, and the present embodiment is mainly improved over the fourth embodiment in that: referring to fig. 7, the mother clock device 1 includes: an input unit 11, a time keeping unit 12, and an output unit 13 connected in this order. The in-vehicle signal apparatus 2 is connected to the input unit 11.
The time keeping unit 12 is used for performing on-vehicle device time service on the driving device 100 using a ground time signal as a time service source. Specifically, the time keeping unit 12 performs the in-vehicle device time service to the driving device 100 by the time service source set by the in-vehicle signal device 2, that is, outputs one time signal to each of the in-vehicle devices in the driving device 100 through the output unit 13, thereby realizing time synchronization between the plurality of in-vehicle devices.
The time keeping unit 12 is also used to generate a mother clock time signal. The master clock time signal is a time signal meeting a preset precision requirement.
The in-vehicle signal device 2 is also configured to control the time keeping unit 12 to time the driving device 100 with a mother clock time signal as a time service source within a preset time.
The vehicle-mounted signal device 2 is further configured to obtain a ground time signal sent by the target ground signal device 200 when the driving device 100 is still in the time service abnormal state after the preset time elapses.
Specifically, when it is determined that the driving device 100 is in an abnormal state, the on-board signal device 2 starts timing, and sends a control instruction to the time keeping unit 12 in the process of timing to a preset time, and when the time keeping unit 12 receives the control instruction, the time keeping unit 12 gives time to the on-board devices in the driving device 100 by using a mother clock time signal meeting a preset accuracy requirement as a time giving source within the preset time, so as to achieve time synchronization between the on-board devices in the driving device 100.
After the timing reaches the preset time, the vehicle-mounted signal device 2 judges whether the driving device 100 is still in the abnormal time service state, if the driving device 100 is still in the abnormal time service state, the ground time signal sent by the target ground signal device 200 in wireless communication connection with the driving device 100 is obtained, and the time keeping unit 12 is controlled to carry out vehicle-mounted device time service on the driving device 100 by taking the ground time signal as a time service source. If the driving device 100 returns to the normal time service state, that is, if it is reliable that the driving device 100 receives the satellite time signal, the time keeping unit 12 of the driving device 100 performs the in-vehicle device time service on the driving device 100 using the received satellite time signal transmitted from the satellite navigation system 300 as the time service source.
A seventh embodiment of the present invention relates to a ground signal device for managing and controlling the operation of a driving device running on a traffic track; taking the driving device as a train as an example, the ground signal device may be a trackside device arranged on a train running path, the ground signal device may be arranged in intervals according to the train running path, and the ground signal device is generally arranged in a non-open space such as a station, a tunnel and the like. When the train approaches, the ground signal equipment can be in wireless communication connection with the train through a wireless communication network of GSM-R.
Referring to fig. 4 and 8, the ground signal apparatus 200 includes: the signal processing device 4 and the terrestrial satellite communication device 5 are connected to each other. The signal processing device 4 is connected to the driving device 100 in wireless communication.
The ground satellite communication device 5 is used for receiving a satellite time signal sent by the satellite navigation system 300; specifically, the ground satellite communication device 5 is a satellite receiver, and the ground signal device 200 is in communication connection with a satellite navigation system 300 (for example, a beidou satellite navigation system, a GPS satellite navigation system, or a space-based satellite navigation system) through the vehicle-mounted satellite communication device 3, and receives a satellite time signal through the ground satellite communication device 5.
The signal processing device 4 is configured to, when receiving a time acquisition request sent when the driving device 100 is in the time service abnormal state, send a received satellite time signal sent by the satellite navigation system 300 to the driving device 100 as a ground time signal, so that the driving device 100 performs on-vehicle device time service on the driving device 100 by using the ground time signal as a time service source.
An eighth embodiment of the present invention relates to a ground signal apparatus, and the present embodiment is relative to the seventh embodiment: referring to fig. 9, the signal processing apparatus 4 includes: an infinite block controller 41, a ground communication module 42 and a point information transmission module 43 which are connected with each other; the infinite block controller 41 is connected to the terrestrial satellite communication device 5, and the terrestrial signal device 200 is connected to the driving device 100 through the terrestrial communication module 42 in wireless communication. The infinite block controller 41, which is the core of the ground signal device 200, completes time transfer of the ground device by using a satellite time signal transmitted from the satellite navigation system 200 as a time transfer source, and achieves time synchronization between devices such as a ground operation control system, a device, and a driving schedule management device.
The point information sending module 43 is configured to send positioning information used for representing the position of the ground signal device 200 to the driving device 100, so that the driving device 100 determines whether the driving device 100 is in a time service abnormal state according to the received positioning information.
The infinite occlusion controller 41 is configured to transmit a ground time signal to the driving device 100 through the ground communication module 42.
A ninth embodiment of the present invention relates to a time service system including at least one of the steering devices of any one of the fourth to sixth embodiments and at least one of the ground signal devices of the seventh or eighth embodiment.
While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.
These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.
Claims (15)
1. A time service method of a driving device is characterized by comprising the following steps:
judging whether the driving equipment is in a time service abnormal state or not;
if the driving equipment is in an abnormal time service state, acquiring a ground time signal sent by target ground signal equipment in wireless communication connection with the driving equipment, wherein the ground time signal is a satellite time signal sent by a satellite navigation system and received by the target ground signal equipment;
and the ground time signal is used as a time service source to carry out vehicle-mounted equipment time service on the driving equipment.
2. The time service method of the driving equipment according to claim 1, wherein the judging whether the driving equipment is in the abnormal time service state comprises: and determining whether the driving equipment is in an abnormal time service state or not according to the received positioning information sent by the target ground signal equipment in wireless connection with the driving equipment, wherein the positioning information is used for representing the position of the target ground signal equipment.
3. The time service method of the driving equipment according to claim 2, wherein the step of determining whether the driving equipment is in the abnormal time service state according to the received positioning information sent by the target ground signal equipment in wireless connection with the driving equipment comprises the following steps:
judging whether the positioning information sent by the target ground signal equipment is located in a preset position information base or not;
and if the positioning information sent by the target ground signal equipment is located in a preset position information base, determining that the driving equipment is in a time service abnormal state.
4. The time service method of the driving equipment according to claim 1, wherein when the driving equipment is determined to be in the abnormal time service state and before the ground time signal sent by the target ground signal equipment is acquired, the method further comprises the following steps:
generating a master clock time signal by the master clock equipment within a preset time to serve as a time service source for carrying out time service on the vehicle-mounted equipment by the driving equipment;
and if the driving equipment is still in the time service abnormal state after the preset time, entering the step of acquiring the ground time signal sent by the target ground signal equipment.
5. The time service method for a driving device according to claim 1, further comprising, after the time service for the driving device by the on-vehicle device is performed using the ground time signal as a time service source:
and if the driving equipment recovers the normal time service state, the received satellite time signal sent by the satellite navigation system is taken as a time service source to carry out vehicle-mounted equipment time service on the driving equipment.
6. The time service method of the driving device according to claim 3, wherein the position information base includes: at least one location information for indicating a non-open space.
7. A steering apparatus, comprising: the system comprises a mother clock device, a vehicle-mounted signal device and a vehicle-mounted satellite communication device which are connected with each other;
the vehicle-mounted satellite communication equipment is used for receiving a satellite time signal sent by a satellite navigation system;
the vehicle-mounted signal equipment is used for judging whether the driving equipment is in an abnormal time service state or not;
the vehicle-mounted signal equipment is used for acquiring a ground time signal sent by target ground signal equipment in wireless communication connection with the driving equipment when the driving equipment is in an abnormal time service state, wherein the ground time signal is a satellite time signal sent by a satellite navigation system and received by the target ground signal equipment, and the ground time signal is sent to the mother clock equipment;
the mother clock device is used for carrying out vehicle-mounted device time service on the driving device by taking the ground time signal as a time service source.
8. The driving device according to claim 7, wherein the vehicle-mounted signal device is configured to determine whether the driving device is in an abnormal time service state according to received positioning information sent by a target ground signal device wirelessly connected with the driving device, wherein the positioning information is used for representing a position of the target ground signal device.
9. The driving apparatus according to claim 8, characterized in that the on-vehicle signal apparatus includes: the vehicle-mounted controller, the point type information receiving module and the vehicle-mounted communication module are connected with each other; the vehicle-mounted controller is in communication connection with the vehicle-mounted satellite communication equipment and the mother clock equipment respectively; the driving equipment is wirelessly connected with ground signal equipment through the vehicle-mounted communication module;
the vehicle-mounted controller is used for acquiring positioning information sent by the target ground signal equipment through the point type information receiving module;
the vehicle-mounted controller is used for judging whether the positioning information sent by the target ground signal equipment is located in a preset position information base or not, and determining that the driving equipment is in a time service abnormal state when the positioning information sent by the target ground signal equipment is judged to be located in the preset position information base.
10. The steering apparatus of claim 7, wherein the mother clock apparatus comprises: the device comprises an input unit, a time keeping unit and an output unit which are connected in sequence; the vehicle-mounted signal equipment 2 is connected to the input unit;
the time keeping unit is used for carrying out vehicle-mounted equipment time service on the driving equipment by taking the ground time signal as a time service source;
the time keeping unit is also used for generating a mother clock time signal;
the vehicle-mounted signal equipment is also used for controlling the time keeping unit to carry out vehicle-mounted equipment time service on the driving equipment by taking the mother clock time signal as a time service source within preset time;
the vehicle-mounted signal equipment is further used for acquiring a ground time signal sent by the target ground signal equipment when the driving equipment is still in a time service abnormal state after the preset time.
11. The driving device according to claim 7, wherein the vehicle-mounted signal device is further configured to transmit a satellite time signal received by the vehicle-mounted satellite communication device to the mother clock device when the driving device recovers the normal time service state;
the mother clock equipment is used for carrying out time service on the vehicle-mounted equipment by taking a satellite time signal sent by a satellite navigation system as a time service source.
12. The driving apparatus according to claim 9, characterized in that the position information base includes therein: at least one location information indicating a non-open space.
13. A ground signal apparatus, comprising: the signal processing equipment and the ground satellite communication equipment are connected with each other; the signal processing equipment is in wireless communication connection with the driving equipment;
the ground satellite communication equipment is used for receiving a satellite time signal sent by a satellite navigation system;
the signal processing device is used for sending a received satellite time signal sent by a satellite navigation system to the driving device as a ground time signal when receiving a time obtaining request sent by the driving device when the driving device is in an abnormal time service state, so that the driving device can carry out vehicle-mounted device time service on the driving device by taking the ground time signal as a time service source.
14. A surface signal apparatus as claimed in claim 13, wherein the signal processing apparatus comprises: the wireless block controller, the ground communication module and the point type information sending module are connected with each other; the ground signal device is in wireless communication connection with the driving device through the ground communication module;
the point type information sending module is used for sending the positioning information used for representing the position of the ground signal equipment to the driving equipment so that the driving equipment can determine whether the driving equipment is in a time service abnormal state or not according to the received positioning information;
the infinite occlusion controller is used for sending the ground time signal to the driving equipment through the ground communication module.
15. A time service system, comprising: at least one steering device according to any one of claims 7 to 12 and at least one ground signal device according to claim 13 or 14.
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