CN115503786B - Processing method and system for improving usability of vehicle-mounted equipment - Google Patents
Processing method and system for improving usability of vehicle-mounted equipment Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0072—On-board train data handling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
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Abstract
A processing method and a system for improving the usability of vehicle-mounted equipment store temporary speed limit information through a memory chip of the vehicle-mounted equipment or other communication equipment, and continuously update the distance between the temporary speed limit information and the starting point of a temporary speed limit range in the operation process. After the vehicle-mounted equipment is restarted, the relative position relation between the vehicle-mounted equipment and the temporary speed limiting information stored before power failure is judged through the link information of the responder, so that the vehicle is controlled by correctly utilizing the temporary speed limiting information. The invention uses the memory chip or other devices to store the temporary speed limit, the vehicle-mounted device can read after restarting, the vehicle-mounted device directly enters a complete monitoring mode by using the fixed line data of the responder and the temporary speed limit data stored before power failure, and the temporary speed limit data of the responder is not required to be waited. The invention solves the problem of how to quickly enter the normal monitoring mode after the vehicle-mounted equipment is restarted, thereby improving the usability of the vehicle-mounted equipment.
Description
Technical Field
The invention relates to the technical field of railway signal control, in particular to a processing method and a processing system for improving the usability of vehicle-mounted equipment.
Background
The vehicle-mounted equipment is a signal control equipment installed on a railway train and plays a key role in ensuring the driving safety. The basic working principle is that according to line data stored in advance or acquired from ground equipment, a train control target point position (corresponding to a front closing signal machine, a track section tail end occupied by a front train or other dangerous points) is acquired from the ground equipment, and a speed limit curve is calculated to prevent the train from exceeding the allowable speed of the line, crossing the closed signal machine and the like. When the speed of the train is close to the speed limit curve, if a driver does not perform speed reduction operation, the vehicle-mounted equipment respectively gives out sound alarm prompt and outputs common brake for speed reduction and even emergency brake stop according to the difference value of the speed of the train and the speed limit curve so as to ensure the driving safety.
The vehicle-mounted equipment needs to know line data such as speed limit, gradient and the like of a line for calculating a speed limit curve to realize vehicle control. The line data can be divided into fixed line data (information such as fixed speed limit, gradient, track section, etc.) and temporary speed limit. The temporary speed limit is a speed limit in a temporary situation, for example, some line sections caused by weather, construction and the like need to be temporarily decelerated.
In the prior art, a CTCS-2-level train operation control system applies a series-train control vehicle-mounted device (CTCS 2-200C type) (China railway Press, book number: ISBN 978-7-113-13047-3) page 6, and figure 2-1 shows a vehicle-mounted device installation mode of a 250km/h motor train unit at present; the invention discloses a Chinese invention patent application (CN 112550361A) and discloses an ATP and LKJ integrated vehicle-mounted device, wherein an LKJ vehicle control function is integrated into an ATP main control unit without modifying a vehicle, so that the installation space and the cost are saved; the invention discloses a processing system and a processing method of vehicle-mounted equipment suitable for various train control ground systems, which are applied to the China invention patent application (CN 114771604A). The system converts the line data of a common-speed railway into a transponder message format which can be processed by the current vehicle-mounted equipment and sends the transponder message format to the vehicle-mounted equipment by utilizing an existing data channel, so that the vehicle-mounted equipment can normally operate on the common-speed railway.
In the prior art, the processing of storing the temporary speed limit data when the vehicle-mounted equipment is powered off is not mentioned. After restarting, the current vehicle-mounted equipment can be switched to a complete monitoring mode only after fixed line data and temporary speed limit information of the transponder are received again when the vehicle-mounted equipment works at a CTCS-2 level. If the interval is restarted, the vehicle-mounted equipment must operate at a limited speed in a partial monitoring mode, although fixed line data can be received from a passive transponder of the interval, the vehicle-mounted equipment still needs to operate to a front station to receive temporary speed limiting information from an active transponder, and the temporary speed limiting information is converted into a complete monitoring mode, so that the transportation efficiency is seriously influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a processing method and a system for improving the usability of vehicle-mounted equipment. After the vehicle-mounted equipment is restarted, the relative position relation between the vehicle-mounted equipment and the temporary speed limit information stored before power failure is judged through the link information of the responder, so that the vehicle is controlled by correctly utilizing the temporary speed limit information. The invention specifically adopts the following technical scheme:
a processing method for improving the usability of vehicle-mounted equipment comprises the following steps:
step one, after the vehicle-mounted equipment is powered on every time, acquiring a temporary speed-limiting related data packet from a storage chip or an LKJ (Link keying) device according to configuration parameters;
after the vehicle-mounted equipment successfully acquires the data packet, firstly judging whether the data is correct according to the check value, if so, checking the date time in the data packet, and finally, whether the received transponder ID, the temporary speed limit information and the link information are valid values, if so, checking the difference value between the current date time and the date time in the data packet, and if the difference value is within the specified time, considering that the timeliness of the data meets the requirement, wherein the time parameter is configurable and is used for ensuring that the vehicle-mounted equipment uses the stored temporary speed limit related data packet only after being restarted for a short time;
step three, after the vehicle-mounted equipment is electrified to finish data reading operation and a driver inputs departure parameters, the vehicle-mounted equipment operates at a speed limit in a partial monitoring mode, the validity of a transponder message is checked according to the existing logic of the vehicle-mounted equipment when the transponder message is received in the operation process, and if the transponder message is valid, different processing is carried out according to whether the message contains temporary speed limit information;
if the current responder message contains temporary speed limit information, the application layer of the vehicle-mounted equipment directly uses the temporary speed limit information of the responder, generates a temporary speed limit related data packet according to a data storage operation flow, and writes the temporary speed limit related data packet into a storage chip or sends the temporary speed limit related data packet to LKJ equipment; if the current transponder message does not contain temporary speed limit information, the vehicle-mounted equipment uses a temporary speed limit related information packet acquired from a storage chip or LKJ equipment, and when the vehicle-mounted equipment is used, the vehicle-mounted equipment needs to judge the relative position of the train and the temporary speed limit information stored before power failure;
after the data positioning is finished, the vehicle-mounted equipment provides each temporary speed limit and the rest temporary speed limit range which are not entered or entered but not cleared at the tail of the train for the application layer by combining the distance between the current transponder and the starting point of the temporary speed limit range and the train length information;
and step six, continuously updating the temporary speed-limiting related information packet according to the data updating flow in the running process of the vehicle-mounted equipment so as to be conveniently used after the equipment is restarted.
Further, in the step one, the vehicle-mounted device adds configuration parameters of a temporary speed limit storage mode, and the parameters have 5 options: (1) the temporary speed limit is not saved; (2) only a memory chip is adopted; (3) only LKJ was used; (4) the memory chip takes precedence; (5) LKJ takes precedence and is configured in advance;
1) When the temporary speed limit is not stored, the vehicle-mounted equipment does not store and read the temporary speed limit data to the storage chip or the LKJ equipment;
2) When the temporary speed limit data are configured to be (2) or (3), the vehicle-mounted equipment only adopts one mode to store and read the temporary speed limit data according to the configuration;
3) And when the data reading mode is configured to be the (4) or the (5), the vehicle-mounted equipment simultaneously adopts two modes to store the temporary speed limit data, one mode is preferentially selected to read the data according to the parameters when the data are read, and when the data are read in the mode fails, the other mode is adopted to read the data.
Further, the data saving operation flow is as follows:
1) If the transponder message received by the vehicle-mounted equipment in the operation process contains temporary speed limit information, the vehicle-mounted equipment writes the temporary speed limit related data into a storage chip or sends the temporary speed limit related data to the LKJ equipment according to the configuration parameters;
2) And when the vehicle-mounted equipment writes the temporary speed-limiting related data into the storage chip, performing read-back check on the data after the writing is finished, and when the read-back data is inconsistent with the data needing to be stored, performing writing and reading again. If the data are not consistent, erasing the data of the memory chip, and not using the memory chip any more;
3) When the vehicle-mounted equipment sends temporary speed-limiting related data to the LKJ equipment, the communication protocol between the vehicle-mounted equipment and the LKJ equipment is met, the LKJ equipment verifies the data according to the communication protocol, if the verification is successful, a response message is replied to the vehicle-mounted equipment, otherwise, the response message is not replied, when the vehicle-mounted equipment does not receive the response message of the LKJ equipment within a specified time, the data is retransmitted, and if the vehicle-mounted equipment continuously sends data for three times and does not receive the reply of the LKJ equipment, the temporary speed-limiting related data is not sent to the LKJ;
4) And the LKJ equipment stores the received temporary speed-limiting related data in an operating memory, and the temporary speed-limiting related data are not stored after the LKJ equipment is restarted.
Further, the step four, in which the vehicle-mounted device determines the relative position of the train and the temporary speed limit information stored before the power failure, includes:
step 4.1, the vehicle-mounted equipment judges whether the link information of the temporary speed-limiting related information packet contains the ID of the current responder, if so, the data positioning is successful, and the distance between the current responder and the last responder received by the temporary speed-limiting related information packet can be obtained according to the link information;
step 4.2, if the link information of the temporary speed limit related information packet does not contain the ID of the current responder, judging whether the current responder message contains reverse link information or not, and if so, continuing to judge and check the link information; if not, the data positioning is considered to be failed;
and 4.3, if the current responder message contains reverse link information, the vehicle-mounted equipment judges whether the reverse link information and the forward link information can be connected or not according to whether the same responder ID exists in the reverse link information and the link information of the temporary speed limit. If the data positioning is successful, the distance between the current responder and the last responder received by the temporary speed limit related information packet can be deduced, and if the data positioning is not successful, the data positioning is considered to be failed;
step 4.4, if the data positioning is successful, the vehicle-mounted equipment takes the newly received transponder as the ID of the last received transponder in the temporary speed-limiting related data packet, updates the distance between the last received transponder in the data packet and the starting point of the temporary speed-limiting range according to the positioning result, updates the link information in the data packet according to the link information of the newly received transponder, synchronously updates the date and time and the check value in the data packet, regenerates the temporary speed-limiting related data packet, and writes the temporary speed-limiting related data packet into the storage chip or sends the temporary speed-limiting related data packet to the LKJ equipment;
and 4.5, if the data positioning fails, setting the content of the temporary speed-limiting related data packet into an invalid value by the vehicle-mounted equipment, and writing the invalid value into a storage chip or sending the invalid value to the LKJ equipment.
Further, the data updating process in the sixth step is as follows:
when the vehicle-mounted equipment receives the new responder group, the temporary speed-limiting related data packet is updated and written into a storage chip or sent to LKJ equipment;
when the vehicle-mounted equipment judges that the time of data updating is more than or equal to 1 minute before the last time, updating the date and time of the temporary speed-limiting related data packet, recalculating the check value, and writing the check value into a storage chip or sending the check value to LKJ equipment;
when the vehicle-mounted equipment has a system fault, the temporary speed limit related data is not updated in the parking process;
and when the vehicle-mounted equipment judges that the temporary speed limit data needs to be discarded or the temporary speed limit data is exhausted according to the existing processing logic, the content of the data packet related to the temporary speed limit is set as an invalid value, and the invalid value is written into a storage chip or sent to the LKJ equipment.
The invention also provides a processing system for improving the usability of the vehicle-mounted equipment, which is used for realizing the method,
the system comprises:
the acquisition module is used for acquiring a temporary speed-limiting related data packet from a storage chip or LKJ equipment according to configuration parameters after the vehicle-mounted equipment is powered on each time;
the using module is used for judging whether the data is correct or not according to the check value after the vehicle-mounted equipment successfully acquires the data packet, if so, checking the date and time in the data packet, and if not, checking whether the responder ID, the temporary speed limit information and the link information are valid values, if so, checking the difference value between the current date and time and the date and time in the data packet, and if the difference value is within the specified time, considering that the timeliness of the data meets the requirement, wherein the time parameter is configurable and is used for ensuring that the vehicle-mounted equipment uses the stored temporary speed limit related data packet only after being restarted for a short time;
the checking module is used for performing speed-limiting operation in a partial monitoring mode after the vehicle-mounted equipment is electrified to finish data reading operation and a driver inputs departure parameters, checking the validity of a transponder message according to the existing logic of the vehicle-mounted equipment when the transponder message is received in the operation process, and performing different processing according to whether the message contains temporary speed-limiting information if the transponder message is valid;
the position judgment module is used for directly using the temporary speed limiting information of the responder by an application layer of the vehicle-mounted equipment if the current responder message contains the temporary speed limiting information, regenerating a temporary speed limiting related data packet according to a data storage operation flow, and writing the temporary speed limiting related data packet into a storage chip or sending the temporary speed limiting related data packet to LKJ equipment; if the current responder message does not contain temporary speed limit information, the vehicle-mounted equipment uses a temporary speed limit related information packet acquired from a storage chip or LKJ equipment, and when the vehicle-mounted equipment is used, the vehicle-mounted equipment judges the relative position of the train and the temporary speed limit information stored before power failure;
the data providing module is used for providing each temporary speed limit which is not entered by the train or entered by the train but not cleared at the tail of the train and the rest temporary speed limit range for an application layer by combining the distance between the current transponder and the starting point of the temporary speed limit range and the train length information after the data positioning is finished by the vehicle-mounted equipment;
and the updating module is used for continuously updating the temporary speed-limiting related information packet according to the data updating flow in the running process of the vehicle-mounted equipment so as to be used after the equipment is restarted.
The invention also relates to a processing device for improving the usefulness of the vehicle-mounted device, which comprises a processor and a memory;
the memory is used for storing computer-executable instructions, and the processor is used for executing the computer-executable instructions so as to execute the processing method for improving the usefulness of the vehicle-mounted equipment.
The present invention also relates to a computer-readable storage medium having stored thereon a computer program characterized in that: the program realizes the processing method for improving the usability of the vehicle-mounted equipment when being executed by the processor.
The technical scheme of the invention obtains the following beneficial effects:
1. the invention uses memory chip or other device to store temporary speed limit, which can be read after restart, and the vehicle device uses the fixed line data of the responder and the temporary speed limit data stored before power off to directly enter into a complete monitoring mode without waiting for the temporary speed limit data of the responder.
2. From the occurrence of a fault to the re-electrification (such as a distance traveled in the time of speed measurement fault and power failure), the vehicle-mounted equipment cannot determine how much distance traveled in the time, and then the vehicle-mounted equipment cannot judge the relative position relationship with the previously stored temporary speed limit after being restarted, and cannot use the previously stored temporary speed limit. The invention realizes the judgment of the relative position relation between the train position and the temporary speed limit before power failure by using the link information of the responder, thereby leading the vehicle-mounted equipment to correctly use the temporary speed limit information stored before power failure.
3. The vehicle-mounted equipment adds the date and time information when the temporary speed limit data are stored, and updates the date and time information at regular time in the operation process, so that the vehicle-mounted equipment is used for judging the timeliness of the temporary speed limit data.
4. The temporary speed limit data is stored by using the storage chip of the nonvolatile memory, so that the temporary speed limit information can be quickly acquired after the vehicle-mounted equipment is restarted.
5. According to the method, the temporary speed limiting data are stored by the LKJ device which is not powered off when the vehicle-mounted device is restarted by utilizing the characteristic that the LKJ device is communicated with the vehicle-mounted device and does not share a power switch, so that the temporary speed limiting information can be quickly acquired after the vehicle-mounted device is restarted. The device for storing the temporary speed limit by using the communication mode is not limited to the LKJ device, and other devices which are communicated with the vehicle-mounted device and do not share a power switch with the vehicle-mounted device can be adopted.
6. When the temporary speed limit data is stored, the contents of the ID of the last received transponder, the distance between the last received transponder and the starting point of the temporary speed limit range, the link information and the like are added, and the data updating is carried out when a new transponder is received, so that the relative position relation of the temporary speed limit is judged after the vehicle-mounted equipment is restarted. The vehicle-mounted equipment judges the relative position of the train and the temporary speed limit stored before power failure by using the forward and reverse link information.
Drawings
FIG. 1 is a schematic diagram of the transponder data message content, temporary speed limit and link information of the present invention;
FIG. 2 is a block diagram of the vehicular apparatus of the present invention;
fig. 3 is a flowchart of information related to temporary speed limit saving by the vehicle-mounted device using the memory chip or the LKJ device according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby. It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The CTCS-2-level vehicle-mounted equipment and a train operation monitoring device (LKJ) are installed on a 250km/h motor train unit in China, the CTCS-2-level vehicle-mounted equipment is mainly used for controlling trains on a high-speed railway, and the LKJ is used for controlling trains on a common-speed railway. 350 The km/h motor train unit is provided with CTCS-3 level vehicle-mounted equipment, the intercity railway 160 km/h motor train unit is provided with CTCS-2 level vehicle-mounted equipment, and the two equipment are less in operation on a common speed railway, so that the LKJ is not installed. When the CTCS-3 level vehicle-mounted equipment works at the CTCS-3 level, line data is acquired in a wireless mode. When the CTCS-3 level vehicle-mounted equipment works at a CTCS-2 level and when the CTCS-2 level vehicle-mounted equipment works, required line data are obtained from the transponder. For convenience of description, hereinafter, the in-vehicle devices refer to a CTCS-2 class in-vehicle device and a CTCS-3 class in-vehicle device operating at a CTCS-2 class, unless otherwise specified. When the motor train unit normally operates, after the vehicle-mounted equipment is powered on and a driver inputs departure parameters, entering a partial monitoring mode, and limiting the speed for 45 km/h; and in the running process of the train, the vehicle-mounted equipment utilizes the vehicle-mounted transponder receiving antenna to position and acquire line data through the ground transponder. And only after receiving the fixed line data and the temporary speed limit (both data are available), the system can enter a complete monitoring mode, wherein the highest speed limit of the CTCS-3-level vehicle-mounted equipment reaches 300 km/h, and the highest speed limit of the CTCS-2-level vehicle-mounted equipment reaches 250 km/h.
The transponder is a ground point type device for train information transmission, and when a train passes by, the transponder is activated by a signal of a receiving antenna of the vehicle-mounted transponder to send a stored message to the vehicle-mounted device. The transponder is divided into a passive transponder and an active transponder, the passive transponder sends fixed message content, the active transponder is connected with other equipment through a cable, the other equipment can control the content of the sent message to fix line data, the data is generally sent by the passive transponder, and the temporary speed limit can only be sent by the active transponder. The passive transponders are installed in stations and intervals, and the intervals are generally arranged at intervals of 1-2 km; the active transponder is installed at the station and needs to pass throughThe cable is connected with other devices in the station, and sends different messages according to actual situations, as shown in fig. 1, it is assumed that the transponder group a is an active transponder group, and the temporary speed limit information sent by the transponder group a includes: extent of temporary speed limit descriptionL_ TSRarea、Number of temporary speed limits within rangenDistance to each temporary speed limitD_TSR（n）Speed limit of each temporary speed limitV_TSR（n）And lengthL_TSR（n）And so on. Meanwhile, the message of each group of transponders also contains link information, which is used for predicting the information such as ID, distance and the like of the front transponder group, and generally comprises at least two front groups. And the vehicle-mounted equipment carries out positioning correction on the train position according to the link information. Taking fig. 1 as an example, assuming that the transponder group a gives notice to two front groups of transponders, the number 2 of linked transponders, the ID of the transponder group B, and the link distance will be describedD_LINK(AB)ID and link distance of the responder group CD_LINK(BC). In addition, the transponder group may also contain linking information (not identified in fig. 1) for the other direction, allowing for the train to run in reverse. For example, the transponder group C may describe the ID and distance of the transponder groups B, a in the opposite direction, in addition to the ID and distance of the transponder groups D, E in the front direction, and be distinguished by the direction identification bits.
As shown in fig. 2, the vehicle-mounted device stores information related to the temporary speed limit using a memory chip or an LKJ device. On the basis of the existing vehicle-mounted equipment, a storage chip is added to the main control unit or the existing storage chip is utilized. The memory chip adopts a nonvolatile memory, and can store data after power failure. The power switch of the LKJ equipment is independent of the vehicle-mounted equipment, and when the vehicle-mounted equipment is restarted, the LKJ equipment cannot be powered off.
The basic working principle is that when the vehicle-mounted equipment receives temporary speed limit information of the responder, the vehicle-mounted equipment stores data into a storage chip according to configuration parameters or sends the data to LKJ equipment in a communication mode, and the distance between the vehicle-mounted equipment and the starting point of the temporary speed limit range is continuously updated according to the responder in the operation process. And when the vehicle-mounted equipment is powered on again, reading the temporary speed limiting information from the storage chip according to the configuration parameters or acquiring the temporary speed limiting information from the LKJ equipment in a communication mode. When the vehicle-mounted equipment receives a new transponder, judging the relative position relation between the current transponder and the temporary speed limit according to the ID and the information of the transponder, and screening out the effective temporary speed limit for the application layer of the vehicle-mounted equipment to use. By combining the fixed line data acquired from the transponder, the vehicle-mounted equipment can be switched to a normal monitoring mode when the temporary speed limiting information of the transponder does not need to be received, and the operation efficiency is improved.
When the communication mode is selected to store the temporary speed limit data, other devices which are communicated with the vehicle-mounted device can be selected besides the LKJ device. The selected equipment does not share a power switch with the vehicle-mounted equipment, and can realize a communication protocol for storing and reading temporary speed limit data with the vehicle-mounted equipment.
The invention discloses a processing method for improving the usability of vehicle-mounted equipment, which comprises the following steps:
step one, after the vehicle-mounted equipment is powered on every time, the temporary speed-limiting related data packet is obtained from the storage chip or the LKJ equipment according to the configuration parameters.
Specifically, if the vehicle-mounted device cannot read data from the storage chip or does not receive a reply to the LKJ request data three times in a row, it is determined that data acquisition has failed.
Description of parameter configuration:
the vehicle-mounted equipment adds configuration parameters of a temporary speed limit storage mode, and the parameters have 5 options: (1) the temporary speed limit is not saved; (2) only a memory chip is adopted; (3) only LKJ was used; (4) the memory chip takes precedence; (5) LKJ takes precedence. And the maintenance personnel carry out configuration in advance according to the actual situation.
1. The configuration is that (1) when the temporary speed limit is not saved, the vehicle-mounted equipment does not save and read the temporary speed limit data to the storage chip or the LKJ;
2. when the configuration is (2) or (3), the vehicle-mounted equipment only adopts one mode to store and read the temporary speed limit data according to the configuration;
3. when the configuration is (4) or (5), the vehicle-mounted equipment simultaneously adopts two modes to store the temporary speed limit data, one mode is preferentially selected to read the data according to the parameters when the data are read, and the other mode is adopted to read when the data are read in failure.
And step two, after the vehicle-mounted equipment successfully acquires the data packet, firstly judging whether the data is correct according to the check value, if so, checking the date and time in the data packet, and finally, checking whether the received transponder ID, the temporary speed limit information and the link information are valid values, if so, checking the difference between the current date and time and the date and time in the data packet, and if the difference is within the set time, considering that the timeliness of the data meets the requirement, wherein the time parameter is configurable and is used for ensuring that the vehicle-mounted equipment uses the stored temporary speed limit related data packet only after being restarted for a short time.
Specifically, if the vehicle-mounted equipment fails to acquire data, data is checked wrongly, data is invalid, and the data timeliness does not meet requirements, a driver is prompted through a human-computer interface unit (DMI).
And step three, after the vehicle-mounted equipment is electrified to finish data reading operation and a driver inputs departure parameters, the vehicle-mounted equipment runs in a partial monitoring mode at a speed limit of 45km/h, the validity of the responder message is checked according to the existing logic of the vehicle-mounted equipment when the responder message is received in the running process, and if the responder message is valid, the responder message is processed. As shown in fig. 3.
And step four, if the current responder message contains temporary speed limit information, the application layer of the vehicle-mounted equipment directly uses the temporary speed limit information of the responder, regenerates a temporary speed limit related data packet according to a data storage operation flow, and writes the temporary speed limit related data packet into a storage chip or sends the temporary speed limit related data packet to the LKJ equipment.
Data saving operation flow:
1. and if the responder message received by the vehicle-mounted equipment in the operation process contains temporary speed limit information, the vehicle-mounted equipment writes the temporary speed limit related data into a storage chip or sends the temporary speed limit related data to the LKJ equipment according to the configuration parameters.
2. And when the vehicle-mounted equipment writes the temporary speed-limiting related data into the storage chip, performing read-back check on the data after the writing is finished, and when the read-back data is inconsistent with the data needing to be stored, performing writing and reading again. And if the data are not consistent, erasing the data of the memory chip and not using the memory chip any more.
3. When the vehicle-mounted equipment sends the temporary speed-limiting related data to the LKJ equipment, the communication protocol between the vehicle-mounted equipment and the LKJ equipment is met. And the LKJ equipment checks the data according to the communication protocol, if the data are checked successfully, the LKJ equipment replies a response message to the vehicle-mounted equipment, and if the data are not checked successfully, the LKJ equipment does not reply. When the vehicle-mounted device does not receive the response message of the LKJ device within the preset time, the data is required to be retransmitted. And if the vehicle-mounted equipment continuously transmits three times without receiving the reply of the LKJ equipment, the temporary speed limit related data is not transmitted to the LKJ after the three times.
4. And the LKJ device stores the received temporary speed limit related data in an operating memory, and does not store the temporary speed limit related data after the LKJ device is restarted.
5. The content of the temporary speed limit related data is shown in table 1, and includes the date and time of the vehicle-mounted device, the last received transponder ID, the distance between the last received transponder and the start point of the temporary speed limit range, temporary speed limit information, link information, and check values generated according to these data, as shown in table 1.
Table 1 contents of temporary speed limit-related data
| Serial number | Content providing method and |
| 1 | Date and |
| 2 | Finally receives the ID of the responder |
| 3 | Finally receiving the distance between the responder and the starting point of the temporary speed limit range |
| 4 | Temporary speed limit information |
| 5 | Linking information |
| 6 | Check value |
6. When the vehicle-mounted equipment performs data storage operation, the generated temporary speed limit related data comprises: the date and time is the current time, the last received transponder ID is the current transponder ID, the distance between the last received transponder and the starting point of the temporary speed limit range is 0 (because the temporary speed limit is based on the transponder that transmits the information), and the temporary speed limit information and the link information are as follows:
the temporary speed limit information in the temporary speed limit related data is temporary speed limit data extracted from a responder message, the distance is based on the responder sending the message, and the content comprises: the temporary speed limit range, the number of temporary speed limits in the range, the distance to each temporary speed limit, the speed limit of each temporary speed limit, the length of a temporary line and the like.
The link information in the temporary speed limit related data packet is link information data extracted from a responder message, the distance is based on the responder sending the message, and the content comprises information such as the ID of the responder in front of operation, the link distance and the like.
For example, as shown in fig. 1, the temporary speed limit and the link information indicate that the vehicle-mounted device receives the temporary speed limit information from the responder group a, and the stored temporary speed limit related data is shown in table 2.
Table 2 temporary speed limit related data packet updated by responder group a
And step five, if the current responder message does not contain temporary speed limit information, the vehicle-mounted equipment uses a temporary speed limit related information packet acquired from the storage chip or the LKJ equipment. When the train speed limiting device is used, the vehicle-mounted equipment needs to judge the relative position of the train and temporary speed limiting information stored before power failure, and the specific processing is as follows:
and 5.1, judging whether the link information of the temporary speed limit related information packet contains the ID of the current responder or not by the vehicle-mounted equipment, if so, successfully positioning the data, and judging whether the distance between the current responder and the starting point of the temporary speed limit range is = the distance between the last responder and the starting point of the temporary speed limit range of the temporary speed limit related information packet + the link distance between the current responder and the last responder of the temporary speed limit related information packet.
And 5.2, if the link information of the temporary speed limit related information packet does not contain the ID of the current responder, judging whether the current responder message contains reverse link information. If yes, continuing to judge and check the link information; if not, the data location is considered to be failed.
And 5.3, if the current responder message contains reverse link information, the vehicle-mounted equipment judges whether the reverse link information and the forward link information can be connected or not according to whether the same responder ID exists in the reverse link information and the temporary speed-limiting link information or not. If the data can be linked up and the data positioning is successful, the distance between the current responder and the last responder received by the temporary speed limit related information packet can be deduced; and if the connection cannot be realized, the data positioning is considered to be failed.
And 5.4, if the data positioning is successful, the vehicle-mounted equipment takes the newly received responder as the last received responder ID in the temporary speed limit related data packet, updates the distance between the last received responder in the data packet and the starting point of the temporary speed limit range according to the positioning result, updates the link information in the data packet according to the link information of the newly received responder, synchronously updates the date and time and the check value in the data packet, regenerates the temporary speed limit related data packet, and writes the temporary speed limit related data packet into the storage chip or sends the temporary speed limit related data packet to the LKJ equipment.
For example, the temporary speed limit related data generated after the vehicle-mounted device passes through the transponder group B is shown in the following table.
Table 3 temporary speed limit related data packet updated by responder group B
And 5.5, if the data positioning fails, setting the content of the temporary speed-limiting related data packet into an invalid value by the vehicle-mounted equipment (the ID of the finally received transponder is set to 0xFFFFFF, the check value is calculated according to the data, and other data are 0), and writing the invalid value into a storage chip or sending the invalid value to the LKJ equipment.
Specifically, as shown in fig. 1, assuming that a system failure occurs after the in-vehicle apparatus passes over the transponder group B, the temporary speed limit information is stored as shown in table 3. According to the different braking parking positions, the method corresponds to a plurality of branches of the processing.
Stopping between transponder sets B and C. After restarting, when the vehicle-mounted equipment receives the transponder group C in the traveling process, the vehicle-mounted equipment can judge that the transponder group C is in the LINK information, and obtain the distance D _ LINK (BC) between the transponder group C and the last received transponder B stored in the temporary speed limit related information according to the LINK information, so that the distance between the current transponder C and the initial point of the temporary speed limit range = the distance between the last received transponder and the initial point of the temporary speed limit range "D _ LINK (AB) + D _ LINK (BC) stored in the temporary speed limit related information is obtained.
The transponder group C is crossed during braking and stops between C and D. In the fault braking process, the vehicle-mounted equipment does not update the temporary speed limit information according to the transponder group C. After the vehicle-mounted device is restarted, when the vehicle-mounted device receives the transponder D in the traveling process, the transponder group D can be judged to be still in the LINK information, the distance D _ LINK (BC) + D _ LINK (CD) between the transponder group D and the last transponder B received stored in the temporary speed limit related information is obtained according to the LINK information, and therefore the distance between the current transponder D and the temporary speed limit range starting point = the distance between the last transponder received and the temporary speed limit range starting point stored in the temporary speed limit related information D _ LINK (AB) + D _ LINK (CD) is obtained according to the LINK information.
The failure braking process continuously passes over the transponders C and D and stops between D and E. After the vehicle-mounted equipment is restarted, the responder group E is received in the traveling process, the vehicle-mounted equipment judges that the responder group E is not in the link information, and at the moment, whether reverse link information exists in a message of the responder group E or not is checked.
If the reverse LINK information exists, the reverse LINK information comprises the transponders D and C, and the LINK information (B to C and C to D) stored by the temporary speed limit related data packet is combined to obtain the distance from the current transponder group E to B, namely D _ LINK (ED) + D _ LINK (DC) + D _ LINK (BC), so that the distance between the current transponder D and the initial point of the temporary speed limit range = the distance between the last received transponder and the initial point of the temporary speed limit range, which is stored in the temporary speed limit related information, D _ LINK (ED) + D _ LINK (DC) + D _ LINK (BC) is obtained according to the LINK information.
If the reverse link information does not exist, or the reverse link information of the responder group E does not extend to the position D due to the existence of a plurality of responders between the position E and the position D, the vehicle-mounted equipment judges that the link information cannot be connected, and considers that the positioning fails.
And step six, after the data positioning is finished by the vehicle-mounted equipment, providing each temporary speed limit which is not entered by the train or entered by the train but not cleared at the tail of the train and the rest temporary speed limit range for an application layer by combining the information such as the distance between the current transponder and the starting point of the temporary speed limit range, the length of the train and the like.
And step seven, continuously updating the temporary speed limit related information packet according to the data updating flow in the running process of the vehicle-mounted equipment so as to be used after the equipment is restarted.
And (3) data updating flow:
1. and when the vehicle-mounted equipment receives the new transponder group, updating the temporary speed-limiting related data packet according to the method in the fourth step, and writing the temporary speed-limiting related data packet into a storage chip or sending the temporary speed-limiting related data packet to the LKJ equipment.
2. And when the vehicle-mounted equipment judges that the time of data updating is more than or equal to 1 minute before the last time, updating the date and time of the temporary speed-limiting related data packet, recalculating the check value, and writing the check value into a storage chip or sending the check value to the LKJ equipment.
3. When the vehicle-mounted equipment has system failure, the related data of the temporary speed limit is not updated in the parking process.
4. When the vehicle-mounted equipment judges that the temporary speed limit data needs to be discarded or the temporary speed limit data is exhausted according to the existing processing logic, the content of the data packet related to the temporary speed limit is set to be an invalid value (the ID of the finally received responder is set to be 0xFFFFFF, the check value is calculated according to the data, and other data are 0), and the invalid value is written into a storage chip or sent to LKJ equipment.
The invention also provides a processing system for improving the usability of the vehicle-mounted equipment, which is used for realizing the method,
the system comprises:
the acquisition module is used for acquiring a temporary speed-limiting related data packet from the storage chip or the LKJ equipment according to the configuration parameters after the vehicle-mounted equipment is powered on each time;
the using module is used for judging whether the data is correct or not according to the check value after the vehicle-mounted equipment successfully acquires the data packet, if so, checking the date and time in the data packet, and if not, checking whether the responder ID, the temporary speed limit information and the link information are valid values, if so, checking the difference value between the current date and time and the date and time in the data packet, and if the difference value is within the specified time, considering that the timeliness of the data meets the requirement, wherein the time parameter is configurable and is used for ensuring that the vehicle-mounted equipment uses the stored temporary speed limit related data packet only after being restarted for a short time;
the checking module is used for performing speed-limiting operation in a partial monitoring mode after the vehicle-mounted equipment is electrified to finish data reading operation and a driver inputs departure parameters, checking the validity of a transponder message according to the existing logic of the vehicle-mounted equipment when the transponder message is received in the operation process, and performing different processing according to whether the message contains temporary speed-limiting information if the transponder message is valid;
the position judgment module is used for directly using the temporary speed limiting information of the responder by an application layer of the vehicle-mounted equipment if the current responder message contains the temporary speed limiting information, regenerating a temporary speed limiting related data packet according to a data storage operation flow, and writing the temporary speed limiting related data packet into a storage chip or sending the temporary speed limiting related data packet to LKJ equipment; if the current responder message does not contain temporary speed limit information, the vehicle-mounted equipment uses a temporary speed limit related information packet acquired from a storage chip or LKJ equipment, and when the vehicle-mounted equipment is used, the vehicle-mounted equipment judges the relative position of the train and the temporary speed limit information stored before power failure;
the data providing module is used for providing each temporary speed limit which is not entered by the train or entered by the train but not cleared at the tail of the train and the rest temporary speed limit range for an application layer by combining the distance between the current transponder and the starting point of the temporary speed limit range and the train length information after the data positioning is finished by the vehicle-mounted equipment;
and the updating module is used for continuously updating the temporary speed-limiting related information packet according to the data updating flow in the running process of the vehicle-mounted equipment so as to be used after the equipment is restarted.
The invention also relates to a processing device for improving the usefulness of the vehicle-mounted device, which comprises a processor and a memory;
the memory is used for storing computer-executable instructions, and the processor is used for executing the computer-executable instructions so as to execute the processing method for improving the usefulness of the vehicle-mounted equipment.
The invention also relates to a computer-readable storage medium, on which a computer program is stored, characterized in that: the program realizes the processing method for improving the usability of the vehicle-mounted equipment when being executed by the processor.
In summary, in the above-mentioned solution of the embodiment of the present invention, the temporary speed limit information is stored through the memory chip of the vehicle-mounted device itself or other communication devices, and the distance from the starting point of the temporary speed limit range is continuously updated in the operation process. After the vehicle-mounted equipment is restarted, the relative position relation between the vehicle-mounted equipment and the temporary speed limit information stored before power failure is judged through the link information of the responder, so that the vehicle is controlled by correctly utilizing the temporary speed limit information.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (8)
1. A processing method for improving the usability of vehicle-mounted equipment is characterized by comprising the following steps:
step one, after the vehicle-mounted equipment is powered on every time, acquiring a temporary speed-limiting related data packet from a storage chip or LKJ equipment according to configuration parameters;
after the vehicle-mounted equipment successfully acquires the data packet, firstly judging whether the data is correct according to the check value, if so, checking the date time in the data packet, and finally, whether the received transponder ID, the temporary speed limit information and the link information are valid values, if so, checking the difference value between the current date time and the date time in the data packet, and if the difference value is within the specified time, considering that the timeliness of the data meets the requirement, wherein the time parameter is configurable and is used for ensuring that the vehicle-mounted equipment uses the stored temporary speed limit related data packet only after being restarted for a short time;
step three, after the vehicle-mounted equipment is electrified to finish data reading operation and a driver inputs departure parameters, the vehicle-mounted equipment operates at a speed limit in a partial monitoring mode, the validity of a transponder message is checked according to the existing logic of the vehicle-mounted equipment when the transponder message is received in the operation process, and if the transponder message is valid, different processing is carried out according to whether the message contains temporary speed limit information;
if the current responder message contains temporary speed limit information, the application layer of the vehicle-mounted equipment directly uses the temporary speed limit information of the responder, generates a temporary speed limit related data packet according to a data storage operation flow, and writes the temporary speed limit related data packet into a storage chip or sends the temporary speed limit related data packet to LKJ equipment; if the current responder message does not contain temporary speed limit information, the vehicle-mounted equipment uses a temporary speed limit related data packet acquired from a storage chip or LKJ equipment, and when the vehicle-mounted equipment is used, the vehicle-mounted equipment needs to judge the relative position of the train and the temporary speed limit information stored before power failure;
after the data positioning is finished, the vehicle-mounted equipment combines the distance between the current transponder and the starting point of the temporary speed limit range and the train length information to provide each temporary speed limit which does not enter the train or enters the train but does not come out from the tail of the train and the rest temporary speed limit range for an application layer;
and step six, continuously updating the temporary speed-limiting related data packet according to a data updating flow in the operation process of the vehicle-mounted equipment so as to be used after the equipment is restarted.
2. The processing method for improving the usability of the vehicle-mounted device according to claim 1, wherein in the first step, the vehicle-mounted device adds configuration parameters of a temporary speed limit storage mode, and the parameters have 5 options: (1) the temporary speed limit is not saved; (2) only a memory chip is adopted; (3) only LKJ was used; (4) the memory chip takes precedence; (5) LKJ is prior and is configured in advance;
1) When the temporary speed limit is not stored, the vehicle-mounted equipment does not store and read the temporary speed limit data to the storage chip or the LKJ equipment;
2) When the temporary speed limit data are configured to be (2) or (3), the vehicle-mounted equipment only adopts one mode to store and read the temporary speed limit data according to the configuration;
3) And when the data reading mode is configured to be the (4) or the (5), the vehicle-mounted equipment simultaneously adopts two modes to store the temporary speed limit data, one mode is preferentially selected to read the data according to the parameters when the data are read, and when the data are read in the mode fails, the other mode is adopted to read the data.
3. The processing method for improving the usability of the vehicle-mounted device according to claim 1, wherein the data saving operation flow is as follows:
1) If the responder message received by the vehicle-mounted equipment in the operation process contains temporary speed limit information, the vehicle-mounted equipment writes the temporary speed limit related data packet into a storage chip or sends the temporary speed limit related data packet to the LKJ equipment according to the configuration parameters;
2) When the vehicle-mounted equipment writes the temporary speed-limiting related data packet into the storage chip, carrying out read-back check on the data after the writing is finished, and when the read-back data is inconsistent with the data needing to be stored, carrying out writing and reading again; if the data are not consistent, erasing the data of the memory chip, and not using the memory chip any more;
3) When the vehicle-mounted equipment sends a temporary speed-limiting related data packet to the LKJ equipment, the communication protocol between the vehicle-mounted equipment and the LKJ equipment is met, the LKJ equipment verifies the data according to the communication protocol, if the verification is successful, a response message is replied to the vehicle-mounted equipment, otherwise, the response message is not replied, when the vehicle-mounted equipment does not receive the response message of the LKJ equipment within a set time, the data is retransmitted, and if the vehicle-mounted equipment continuously sends data for three times and does not receive the reply of the LKJ equipment, the temporary speed-limiting related data packet is not sent to the LKJ;
4) And the LKJ equipment stores the received temporary speed-limiting related data packet in an operating memory, and does not store the temporary speed-limiting related data packet after the LKJ equipment is restarted.
4. The processing method for improving the usability of the vehicle-mounted device according to claim 1, wherein the step four in which the vehicle-mounted device judges the relative position of the train and the temporary speed limit information stored before the power failure comprises:
step 4.1, the vehicle-mounted equipment judges whether the link information of the temporary speed limit related data packet contains the ID of the current responder, and if so, the data positioning is successful;
step 4.2, if the link information of the temporary speed limit related data packet does not contain the ID of the current responder, judging whether the current responder message contains reverse link information or not, and if so, continuing to judge and check the link information; if not, the data positioning is considered to be failed;
4.3, if the current responder message contains reverse link information, the vehicle-mounted equipment judges whether the reverse link information and the forward link information can be connected or not according to whether the same responder ID exists in the reverse link information and the temporary speed-limiting link information or not; if the data positioning is successful and the connection is available, the distance between the current responder and the last responder received by the temporary speed limit related data packet can be deduced, and if the data positioning is not successful, the data positioning is considered to be failed;
step 4.4, if the data positioning is successful, the vehicle-mounted equipment takes the newly received transponder as the ID of the last received transponder in the temporary speed-limiting related data packet, updates the distance between the last received transponder in the data packet and the starting point of the temporary speed-limiting range according to the positioning result, updates the link information in the data packet according to the link information of the newly received transponder, synchronously updates the date and time and the check value in the data packet, regenerates the temporary speed-limiting related data packet, and writes the temporary speed-limiting related data packet into the storage chip or sends the temporary speed-limiting related data packet to the LKJ equipment;
and 4.5, if the data positioning fails, setting the content of the temporary speed-limiting related data packet into an invalid value by the vehicle-mounted equipment, and writing the invalid value into a storage chip or sending the invalid value to the LKJ equipment.
5. The processing method for improving the usability of the vehicle-mounted device according to claim 4, wherein the data updating process in the sixth step is as follows:
when the vehicle-mounted equipment receives the new responder group, the temporary speed-limiting related data packet is updated and written into a storage chip or sent to LKJ equipment;
when the vehicle-mounted equipment judges that the time of data updating is more than or equal to 1 minute before the last time, updating the date and time of the temporary speed-limiting related data packet, recalculating the check value, and writing the check value into a storage chip or sending the check value to LKJ equipment;
when the vehicle-mounted equipment has a system fault, the temporary speed limit related data packet is not updated in the parking process;
and when the vehicle-mounted equipment judges that the temporary speed limit data needs to be discarded or the temporary speed limit data is exhausted according to the existing processing logic, the content of the data packet related to the temporary speed limit is set as an invalid value, and the invalid value is written into a storage chip or sent to the LKJ equipment.
6. A processing system for improving the usability of an on-board device for carrying out the method according to any one of claims 1 to 5,
the system comprises:
the acquisition module is used for acquiring a temporary speed-limiting related data packet from the storage chip or the LKJ equipment according to the configuration parameters after the vehicle-mounted equipment is powered on each time;
the using module is used for judging whether the data is correct or not according to the check value after the vehicle-mounted equipment successfully acquires the data packet, if so, checking the date and time in the data packet, and finally, judging whether the received transponder ID, the temporary speed limit information and the link information are valid values or not, if so, checking the difference value between the current date and time and the date and time in the data packet, and if the difference value is within the set time, considering that the timeliness of the data meets the requirement, wherein the time parameter is configurable and is used for ensuring that the vehicle-mounted equipment uses the stored temporary speed limit related data packet only after being restarted for a short time;
the checking module is used for carrying out speed-limiting operation in a partial monitoring mode after the vehicle-mounted equipment is electrified to finish data reading operation and a driver inputs departure parameters, checking the validity of a responder message according to the existing logic of the vehicle-mounted equipment when the responder message is received in the operation process, and carrying out different processing according to whether temporary speed-limiting information is contained in the message if the responder message is valid;
the position judgment module is used for directly using the temporary speed limit information of the responder by an application layer of the vehicle-mounted equipment if the current responder message contains the temporary speed limit information, regenerating a temporary speed limit related data packet according to a data storage operation flow, and writing the temporary speed limit related data packet into a storage chip or sending the temporary speed limit related data packet to the LKJ equipment; if the current transponder message does not contain temporary speed limit information, the vehicle-mounted equipment uses a temporary speed limit related data packet acquired from a storage chip or LKJ equipment, and when the vehicle-mounted equipment is used, the vehicle-mounted equipment judges the relative position of the train and the temporary speed limit information stored before power failure;
the data providing module is used for providing each temporary speed limit which is not entered or entered but not cleared at the tail of the train and the rest temporary speed limit range for an application layer by combining the distance between the current transponder and the starting point of the temporary speed limit range and the train length information after the data positioning is finished by the vehicle-mounted equipment;
and the updating module is used for continuously updating the temporary speed-limiting related data packet according to the data updating flow in the running process of the vehicle-mounted equipment so as to be used after the equipment is restarted.
7. A processing device for improving usability of an in-vehicle device, characterized in that:
comprises a processor and a memory;
the memory is used for storing computer-executable instructions, and the processor is used for executing the computer-executable instructions so as to execute the processing method for improving the usability of the vehicle-mounted equipment according to any one of claims 1 to 5.
8. A computer-readable storage medium having stored thereon a computer program, characterized in that: the program, when executed by a processor, implements a processing method for improving usability of an in-vehicle device according to any one of claims 1 to 5.
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