GB2528746A - On-board communication device - Google Patents
On-board communication device Download PDFInfo
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- GB2528746A GB2528746A GB1508401.5A GB201508401A GB2528746A GB 2528746 A GB2528746 A GB 2528746A GB 201508401 A GB201508401 A GB 201508401A GB 2528746 A GB2528746 A GB 2528746A
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- 238000004891 communication Methods 0.000 title claims abstract description 166
- 238000012360 testing method Methods 0.000 claims abstract description 113
- 230000008054 signal transmission Effects 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 39
- 238000004092 self-diagnosis Methods 0.000 abstract description 6
- 238000003745 diagnosis Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/40—Adaptation of control equipment on vehicle for remote actuation from a stationary place
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0007—Measures or means for preventing or attenuating collisions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
- B61L3/16—Continuous control along the route
- B61L3/22—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3822—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving specially adapted for use in vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/12—Speed
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
When an on-board communication device 101 on a mobile body (such as a rail vehicle) transmits a self-diagnosis test message from a test signal transmission antenna 110, it can collide with a message signal transmitted from a trackside communication device 102, resulting in a failure to properly receive the message signal. In the invention, test signals generated by a test signal generation circuit 109 are of two types; long and short. The short message is transmitted from the antenna 110 and received by on-board reception antenna 114. However, the long message length is not transmitted by antenna 110 but is input directly into a decoding circuit 115 via a test signal transmission path 111. When the message signal from the trackside communication device 102 is detected, decoding and transmission of the test signals are stopped, and demodulation/decoding of the message signal from device 102 are performed so as to reliably receive the message signal from the device 102.
Description
ON-BOARD COMMUNICATION DEVICE
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to an on-board communication device provided on a mobile body which conducts communication with a trackside communication device.
Description of the Related Art
As a background art of this technical field, Japanese Patent Laid-Open No. 2001-1 86606 (Patent Document 1) can be cited. This Gazette proposes a method in which a test antenna for diagnosing a reception device of an on-board communication device is prepared in the on-board communication device other than an antenna which conducts communication with a trackside communication device, and the reception device is diagnosed when the on-board communication device is started.
Moreover, Japanese Patent Laid-Open No. 2008-99515 (Patent Document 2) proposes a method in which either one of doubled on-board communication devices is made an active controller and the other is made a standby controller, and by providing a testing device for diagnosing the active controller and the standby controller, determination on normality is made so that a failure in the device can be detected.
In general, transmission/reception of message information between the trackside communication device installed on a ground side and the on-board communication device is performed as follows. First, the on-board communication device transmits an electric power wave to the trackside communication device and feeds power. Then, the trackside communication device is started by this power and repeatedly transmits the message information to the on-board communication device, and the on-board communication device receives this. Therefore, in order that the on-board communication device utilizes the message information received from the trackside communication device so as to safely control the mobile body, the message information from the trackside communication device is required to be reliably received.
However, if a reception portion of the on-board communication device fails, the information from the trackside communication device cannot be received, and the trackside communication device cannot be distinguished. Thus, in order to reliably receive the message information from the trackside communication device, self-diagnosis of the reception portion of the on-board communication device needs to be made.
In the single-system on-board communication device illustrated in Patent Document 1, in order to realize safe running of the mobile body, soundness can be checked by making a diagnosis of the reception device at start of the on-board communication device, but while the on-board communication device is operating overtime, the diagnosis of the reception device cannot be made during that period.
Thus, even if the reception device fails, the failure cannot be detected, and the trackside communication device can no longer distinguished. Thus, the mobile body might be stopped depending on the case.
Moreover, in a configuration illustrated in Patent Document 1, if a signal is sent out for a diagnosis in order to confirm whether or not the reception device of itself is normal during running of the mobile body, a signal sent from the trackside communication device collides with the diagnosis signal of the reception device of itself, and there is a concern that the signal from the trackside communication device is affected. Thus, in the end, communication with the trackside communication device might fail. Therefore, with the single-system on-board communication device illustrated in Patent Document 1, a failure cannot be detected while the mobile body operates over time, and even if a diagnosis of the reception device of itself is made during running, communication with the trackside communication device is interfered with.
In order to solve such points, in Patent Document 2, the on-board communication device is doubled, and a testing device for diagnosing the active controller and the standby controller is provided so as to enable a diagnosis of the reception device. Thus, during running of the mobile body, communication can be conducted without interfering with the communication with the trackside communication device, but since the antenna conducting communication with the trackside communication device is not doubled, while an on-board communication device body is doubled, a space and a cost for mounting the device increase.
SUMMARY OF THE INVENTION
In order to solve the above-described problems, the on-board communication device in the present invention includes a test signal generation circuit for generating a test signal simulating a message signal of the trackside communication device, a test signal transmission antenna for transmitting a signal generated in the test signal generation circuit to an on-board reception antenna in the on-board communication device, and a test signal transmission path for transmitting the signal generated in the test signal generation circuit to a decoding circuit of the on-board communication device without via the test signal transmission antenna.
According to the present invention, since it is a single-system on-board communication device, a cost does not increase. Moreover, the reception device of itself can be diagnosed without a collision with a message signal from the trackside communication device. Thus, even during high-speed running, self-diagnosis can be made while stable communication is conducted with the trackside communication device. Problems, configurations and advantageous effects other than the above will be made apparent from description of the following embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an outline configuration view of an on-board communication device in an embodiment 1 of the present invention; FIG. 2 is an outline configuration view of an on-board communication device in a conventional example; FIG. 3 is a view for explaining a relation between communication movement distances of a test signal and a message signal of a trackside communication device and a communicable range in the conventional example; FIG. 4 is a view for explaining a relation between communication movement distances of a test signal and a message signal of a trackside communication device and a communicable range in the embodiment 1 of the present invention; FIG. 5 is an outline configuration view of an on-board communication device in an embodiment 2 of the present invention; FIG. 6 is an explanatory view when output intensity of a test signal wave to be transmitted is set to lowest reception intensity or more for performing trackside communication device detection in test signal transmission processing; FIG. 7 is an explanatory view when output intensity of a test signal wave to be transmitted is set to less than the lowest reception intensity for performing trackside communication device detection in test signal transmission processing; and FIG. 8 is an outline configuration view of an on-board communication device in the embodiment 3 of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Embodiments will be described below by using FIG. 1, FIG. 2, FIG. 3, and FIG. 4.
(Embodiment 1) FIG. 1 is an outline configuration view illustrating an embodiment in which a diagnosis function according to the present invention is applied, and FIG. 2 is an outline configuration view illustrating an embodiment in a conventional technology.
FIG. 3 is a view for explaining an operation of communication processing of an on-board communication device and a trackside communication device in a case of the conventional example, and FIG. 4 is a view for explaining an operation of communication processing of an on-board communication device and a trackside communication device of this embodiment.
A trackside communication device 102 illustrated in FIG. 1 and FIG. 2 is installed on a ground side and is started by receiving an electric power wave from an on-board communication device 101 and gaining electric power and conducts communication with the on-board communication device 101. In general, as long as the electric power wave is continuously received, the trackside communication device 102 continuously transmits a same message signal at all times repeatedly. A message length sent by the trackside communication device is fixed for each trackside communication device, and there are a Long message transmitting approximately 1000 bits and a Short message transmitting approximately several hundred bits in general, but the length of the message is not limited to the two types and a case of three types or more also exists. The on-board communication device 101 has specific decoding means according to the respective message lengths for received message signals with different message lengths.
The on-board communication device 101 according to the conventional technology in FIG. 2 is provided with a reception portion 106 for receiving the message signal with magnetic flux intensity of a predetermined value or more through electromagnetic coupling with the trackside communication device 102 is mounted. In the reception portion 106, a reception intensity detection circuit 112 for detecting reception intensity of the message signal received from the trackside communication device 102, atrackside communication device detection determination portion 113, a demodulation circuit 114 for demodulating the received message signal, a decoding circuit 115 for decoding message information from a demodulated signal, and the like.
Moreover, the on-board communication device is provided with a test signal generation circuit 109 for generating a test signal, a test signal transmission notification circuit 116 for notifying transmission of a test signal to the on-board communication device detection determination portion 113, means for transmitting the test signal to the reception portion 106 of the on-board communication device 101 by using a test signal transmission antenna 110, a power wave transmission portion 104 and a power wave transmission antenna for supplying an electric power wave to the trackside communication device 102, and a transmission/reception antenna for conducting transmission/reception with the trackside communication device 102 and the test signal transmission antenna.
Furthermore, the on-board communication device 101 is provided with a control portion 103 provided with a function for instructing the test signal generation circuit to send out a test signal and a function in which determination of a test result is made and whether or not a signal received from the trackside communication device 102 is correctly received, demodulated/decoded is determined and if it is an abnormal signal, an output of the signal is stopped and abnormality message detection is outputted.
In FIG. 1 which is a first embodiment of the present invention, in addition to the configuration illustrated in FIG. 2, a test signal transmission path 111 which is means for transmitting the test signal generated in the test signal generation circuit 109 to the decoding circuit 115 in the reception portion 106 of the on-board communication device 101 without via the test signal transmission antenna 110 is provided. By means of this configuration, the reception portion 106 of the on-board communication device 101 is diagnosed while plural types of the message signals with different message lengths are handled.
In the following description of this embodiment, the description will be made on the premise that there are two types of message signals sent from the trackside communication device 102, but it is needless to say that the present invention can be applied to a case with three types or more.
In the present invention, in order to diagnose the reception portion, first, on the basis of an instruction of the control portion 103, a test signal is generated in the test signal generation circuit 109 of the test signal transmission portion 108, and a Long message signal generated by the test signal generation circuit 109 is inputted into the decoding circuit 115 in the reception portion 106 via the test signal transmission path 111.
On the other hand, it is configured such that a Short message signal generated by the test signal generation circuit 109 is transmitted from the test signal transmission antenna 110 and received by the transmission/reception antenna 107.
That is, by transmitting the Short message signal with short transmission time from the test signal transmission antenna 110, a path of the reception device from the transmission/reception antenna 107 is diagnosed, while the Long message signal with longer transmission time is inputted into the decoding circuit without via the test signal transmission antenna 110 and a diagnosis of the decoding circuit and after is made.
The fact that the test signal is being transmitted is transmitted also to the trackside communication device detection determination portion 113 via the test signal transmission notification circuit 116.
By using FIG. 3 and FIG. 4, a situation of a case in which a failure such as a collision, interference or the like (hereinafter referred to as "collision") occurs between the message signal from the trackside communication device 102 and the test signal will be described.
The message signal from the trackside communication device 102 has a certain range of a receivable distance. Here, it is assumed that a receivable contact distance 305 is T (fixed length), and transmission speeds of the message from the trackside communication device 102 and a test signal message are x. At this time, by assuming a running speed of the mobile body is V, the number of bits that can be received within the contact distance T decreases with a rise of the running speed V of the mobile body.
As illustrated in FIG. 3, it is assumed that a movement distance required for transmitting one message of the Shod message during running is Ishod 306, a movement distance required for transmitting one message of the Long message is Tiong 307, and Tshort + Tiong «= T holds true. At this time, during high-speed running, if the mobile body is entering the receivable contact range of the trackside communication device transmitting the Short message signal during transmission of a test signal Short message 301, a Short message signal 303 continuously transmitted from the trackside communication device collides with the test signal Short message 301 and crushes one message of the Short message 303 of the trackside communication device. However, in this case, if the control portion instructs stop of transmission, demodulation, and decoding of the test signal on the basis of detection of the trackside communication device, the subsequent Short message signal can be received in the remaining receivable contact distance.
However, in a case that a Long message 304 is repeatedly sent from the trackside communication device 102 in the middle of transmission of a Long message 302 as the test signal, if one of the Long messages 304 is crushed, in this case, even if the control portion instructs stop of the transmission, demodulation, and decoding of the test signal on the basis of detection of the trackside communication device, the subsequent Long message cannot be received in the remaining receivable contact distance. Thus, the Long message 304 from the trackside communication device 102 is missed.
Thus, in the present invention, as illustrated in FIG. 1, a Long message test signal 401 is not transmitted via the antenna 110 but is directly inputted into the decoding circuit 115 by using the test signal transmission path 111. Specifically, since the control portion, the reception portion and the test signal transmission portion are configured by one FAGA (field-programmable gate array), the transmission, demodulation, and decoding of the Long message test signal 401 can be immediately stopped when the message signal from the trackside communication device 102 is detected.
Thus, when this embodiment is applied, in FIG. 4 illustrating a collision relation between the message signal and the test signal, similarly to the case in FIG. 3, assuming that, when Tshoa + Tiong «= T holds true, a movement distance in a case of a collision with the message signal from the trackside communication device 102 at transmission of the Long message test signal 401 is TC402, it can be regarded as TC <<Ti101t, and even in the case of a collision with the Long message signal 304 from the trackside communication device 102 at transmission of the Long message test signal 401 in high-speed running, the repeatedly sent Long message signal 304 can be received. As a result, the message signal from the trackside communication device 102 at self-diagnosis is not missed, and high reliability of the on-board communication device 101 body can be maintained.
In order to avoid a collision between the message signal from the trackside communication device 102 during running of the mobile body and the test signal, there can be a method in which, in the mobile body, an installation place of the trackside communication device is stored in advance, and the test signal is not transmitted in the vicinity of the trackside communication device. However, if a running distance of the mobile body is long or free running is allowed, that cannot be easily handled by storing position information of all the trackside communication devices, and moreover, a problem is caused that the installation place of the trackside communication device is fixed at all times and cannot be moved. Thus, as in the present invention, when the message signal from the trackside communication device is detected, capability of immediate stop of decoding of the test signal or the subsequent transmission of the test signal and of quick start of demodulation/decoding of the message signal from the trackside communication device is extremely useful and can be considered as a technology with wide
applicability.
(Embodiment 2) Subsequently, a second embodiment of the present invention will be described by using FIG. 5 and FIG. 6. This embodiment is applied to a failure detection case in which operation is not started though a message signal exceeding reception detection intensity is received from the trackside communication device 102 in the reception portion 106 of the on-board communication device 101, or a case in which a message signal less than the reception detection intensity not requiring detection is erroneously detected.
In this embodiment, as illustrated in FIG. 5, the reception portion 106 has a reception intensity detection circuit 501 for detecting reception intensity of a message signal received from the trackside communication device 102, a trackside communication device detection determination portion 502, a demodulation circuit 503 for demodulating the received message signal, a decoding circuit 504 for decoding message information from the demodulated signal, and the like.
In the reception portion 106 illustrated in FIG. 5, if the reception intensity detection circuit 501 or the trackside communication device detection determination portion 502 is abnormal, regardless of reception of the message signal with predetermined reception intensity from the trackside communication device 102, a series of functions of the reception portion 106 are not likely to operate. Then, as the result, the trackside communication device 102 is missed.
On the other hand, if the message with the predetermined reception intensity or less is received and a series of the functions of the reception portion 106 are operated, it is likely that the message from the trackside communication device which should not be received is erroneously detected or there is a concern that regardless of non-presence of the trackside communication device 102, the control portion 103 executes processing assuming that the trackside communication device 102 is present.
Such abnormality can be detected by conducting a test in which the output intensity of a test signal wave to be transmitted is set to the lowest reception intensity or more for performing the trackside communication device detection and a test in which it is set to less than the lowest reception intensity in test signal transmission processing as illustrated in FIG. 6 and FIG. 7. That is, if the test signal wave 601 set to the lowest reception intensity or more cannot be received or if a test signal wave 603 set to less than the lowest reception intensity can be received, it can be determined that the reception intensity detection circuit 501 or the trackside communication device detection determination portion 502 fails.
The diagnosis of the reception intensity detection circuit 501 or the trackside communication device detection determination portion 502 is basically made by changing the signal intensity of the Short message transmitted from the test signal generation circuit 109 via the test signal transmission antenna 110.
If the signal of the Short message is transmitted by using the test signal wave 601 set to the lowest reception intensity or more, it is substantially similar to that performed in the embodiment 1, and if the control portion 103 confirms that the signal with the same contents as the test signal instructed in the control portion is detected by the reception portion 106, it is determined that there is no problem with the reception intensity detection circuit 501 or the trackside communication device detection determination portion 502.
Subsequently, when the signal of the Short message is transmitted by using the test signal wave 603 set to less than the lowest reception intensity, if the control portion 103 confirms that the signal with the same contents as the test signal instructed in the control portion is not detected in the reception portion 106, it is determined that there is no problem with the reception intensity detection circuit 501 or the trackside communication device detection determination portion 502, while if the control portion 103 confirms that the signal with the same contents is detected in the reception portion 106, it is determined that there is a problem with the reception intensity detection circuit 501 or the trackside communication device detection determination portion 502.
In any case, when the Long message is used as the test signal, since the Long message is directly inputted into the decoding circuit 115 by using the test signal transmission path 111, if the message signal from the trackside communication device 102 is detected in the trackside communication device detection determination portion 502, immediate stop of the transmission, demodulation, and decoding of the Long message test signal 401 is made possible. Thus, even if the Long message test signal 401 collides with the Long message signal 304 from the trackside communication device 102 when the Long message test signal 401 is transmitted, the repeatedly sent Long message signal 304 can be received, and as a result, high reliability of the on-board communication device 101 body can be kept without missing the message signal from the trackside communication device 102 in self-diagnosis.
(Embodiment 3) Subsequently, by using FIG. 8, a third embodiment of the present invention will be described. In this embodiment, the received message from the trackside communication device 102 is decoded, and a stale failure of a buffer register 701 which temporarily stores the decoded message signal is detected.
As illustrated in FIG. 8, the reception portion 106 is provided with the buffer register 701 which temporarily stores the decoded message of the trackside communication device 102 in an output stage of the decoding circuit 504 in some cases. If a stale failure (non-writable but readable) occurs in a state in which message data of the normal trackside communication device 102 is stored in this buffer register 701, the control portion 103 executes processing by considering that the message of the normal trackside communication device 102 has been extracted though the message data has not been rewritten correctly. Thus, in order to detect a stale failure of the buffer register 701, a plurality of test messages with different contents are prepared for each of the Long message and the Short message in the diagnosis of the reception portion 106 of the on-board communication device 101.
Then, regarding the Long message, the test messages with different contents are sequentially transmitted to the decoding circuit 504 through the test signal transmission path 111 without via the antenna 110. In the control portion 103, if each of the messages transmitted from the test signal generation circuit is confirmed, it is determined that the buffer register 701 is normal, and if not, it is determined that the buffer register 701 has a stale failure.
Regarding the Short message, too, substantially similarly, the test messages with different contents are sequentially transmitted to the on-board reception antenna 107 via the antenna 110. In the control portion 103, if each of the messages transmitted from the test signal generation circuit is confirmed, it is determined that the buffer register 701 is normal and if not, it is determined that the buffer register 701 has a stale failure.
Moreover, in the above-described embodiments, a procedure in which the different test messages, that is, the Long message and the Short message are continuously transmitted, respectively, is described, but if the buffer register 701 can store only one message, presence of the stale failure of the buffer register 701 can be confirmed by alternately transmitting the Long message and the Short message.
In any case, similarly to the case of the embodiment 2, if the Long message is used as the test signal, the Long message is directly inputted into the decoding circuit 115 by using the test signal transmission path 111 and thus, in the trackside communication device detection determination portion 502, if the message signal from the trackside communication device 102 is detected, immediate stop of transmission, demodulation, and decoding of the Long message test signal 401 is made possible. Thus, even if the Long message test signal 401 collides with the Long message signal 304 from the trackside communication device 102 at transmission of the Long message test signal 401, the repeatedly sent Long message signal 304 can be received, and as a result, high reliability of the on-board communication device 101 body can be kept without missing the message signal from the trackside communication device 102 in self-diagnosis.
The present invention is not limited to the above-described embodiments 1, 2, and 3 but includes various variations. Moreover, a part of the configuration of one of the embodiments can be replaced with another embodiment configuration.
Moreover, the above-described embodiments are described so that the present invention is easily understood, and are not necessarily limited to those provided with all the described configurations.
For example, the type of the message or the configuration of the reception portion can be changed as appropriate in accordance with purposes of use and applications. Moreover, it is natural that the other configurations of the on-board communication device and the trackside communication device can include various variations depending on the type, size and the like of the mobile body.
Furthermore, the present invention is described such that the on-board communication device outputs an electric power wave toward the trackside communication device but to the contrary, it is natural that the present invention can be applied to those performing wireless power feed by the electric power wave from the trackside communication device to the mobile body communication device.
Moreover, regarding signal lines and information lines described in the drawings, those considered to be necessary for explanation are indicated and not all the signal lines and information lines on the product are indicated. Actually, it may be considered that almost all the configurations are connected to each other. -11 -
Claims (3)
- What is claimed is: 1. An on-board communication device provided on a mobile body, receiving a message signal transmitted from a trackside communication device by an on-board reception antenna, and processing the message signal received by the on-board reception antenna by a demodulation circuit and a decoding circuit, comprising, a test signal generation circuit for generating a test signal, a test signal transmission antenna, and a trackside communication device detection determination portion making detection determination of the trackside communication device, wherein: in a plurality of types of test signals generated in the test signal generation circuit, a first signal with a long message length is configured to be inputted into the decoding circuit from the test signal generation circuit via a test signal transmission path; in the plurality of types of test signals generated in the test signal generation circuit, a second signal with a message length shorter than the first signal is configured to be inputted into the demodulation circuit from the test signal generation circuit via the test signal transmission antenna and the on-board reception antenna; and in the trackside communication device detection determination portion, when the signal transmitted from the trackside communication device is detected, demodulation, decoding, and transmission processing of the test signal are configured to be stopped.
- 2. The on-board communication device according to claim 1, wherein the on-board communication device is provided with a reception intensity detection circuit for detecting reception intensity of the message signal sent from the trackside communication device; and a control portion is provided capable of checking normality of the reception intensity detection circuit and the trackside communication device detection determination portion by transmitting both the test signal at a detection reception intensity threshold value or more of the message signal and the test signal less than the threshold value generated by the test signal generation circuit to the reception intensity detection circuit and the trackside communication device detection determination portion.
- 3. The on-board communication device according to claim 1 or 2, further comprising: a control portion in which the test signal generation circuit generates a plurality of the test signals with different contents for each type of a message length, transmits the plurality of test signals with the different contents and has the test signals stored in a buffer register provided on the on-board communication device, and can check normality of the buffer register by checking that a storage result of the buffer register is changed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014121706A JP6175408B2 (en) | 2014-06-12 | 2014-06-12 | On-board communication device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201508401D0 GB201508401D0 (en) | 2015-07-01 |
| GB2528746A true GB2528746A (en) | 2016-02-03 |
| GB2528746B GB2528746B (en) | 2017-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1508401.5A Active GB2528746B (en) | 2014-06-12 | 2015-05-15 | On-board communication device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6175408B2 (en) |
| DE (1) | DE102015210633B4 (en) |
| GB (1) | GB2528746B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2549587A (en) * | 2016-03-23 | 2017-10-25 | Hitachi Ltd | On-board device of spot transmission system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6399997B2 (en) * | 2015-12-18 | 2018-10-03 | 株式会社日立製作所 | On-board communication device |
| JPWO2021065281A1 (en) * | 2019-10-03 | 2021-04-08 |
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| DE19647744A1 (en) * | 1996-11-06 | 1998-05-07 | Siemens Ag | Test for reception channel of contactless transmission system |
| JP2001186606A (en) * | 1999-12-24 | 2001-07-06 | Nippon Signal Co Ltd:The | Testing equipment for onboard atc device and testing method for continuity between onboard antenna and receiving part in on-board atc device |
| JP2014068090A (en) * | 2012-09-25 | 2014-04-17 | Hitachi Ltd | Mobile position detector, and wireless transmitter |
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| JP4357516B2 (en) | 2006-10-16 | 2009-11-04 | 株式会社東芝 | Train protection vehicle on-board equipment and its inspection equipment |
| JP5036575B2 (en) * | 2008-01-24 | 2012-09-26 | 三菱電機株式会社 | Wireless communication system for changing logic circuit of variable logic circuit unit |
| JP2014064226A (en) * | 2012-09-24 | 2014-04-10 | Hitachi Ltd | On-board communication device and control method thereof, and mobile body |
| JP6070007B2 (en) * | 2012-09-24 | 2017-02-01 | 日本電気株式会社 | Wireless communication apparatus and failure detection method thereof |
| JP5904918B2 (en) * | 2012-09-25 | 2016-04-20 | 株式会社日立製作所 | ON-VEHICLE DEVICE, ITS CONTROL METHOD AND MOBILE BODY |
-
2014
- 2014-06-12 JP JP2014121706A patent/JP6175408B2/en active Active
-
2015
- 2015-05-15 GB GB1508401.5A patent/GB2528746B/en active Active
- 2015-06-10 DE DE102015210633.0A patent/DE102015210633B4/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19647744A1 (en) * | 1996-11-06 | 1998-05-07 | Siemens Ag | Test for reception channel of contactless transmission system |
| JP2001186606A (en) * | 1999-12-24 | 2001-07-06 | Nippon Signal Co Ltd:The | Testing equipment for onboard atc device and testing method for continuity between onboard antenna and receiving part in on-board atc device |
| JP2014068090A (en) * | 2012-09-25 | 2014-04-17 | Hitachi Ltd | Mobile position detector, and wireless transmitter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2549587A (en) * | 2016-03-23 | 2017-10-25 | Hitachi Ltd | On-board device of spot transmission system |
| GB2549587B (en) * | 2016-03-23 | 2019-01-23 | Hitachi Ltd | On-board device of spot transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016001842A (en) | 2016-01-07 |
| GB201508401D0 (en) | 2015-07-01 |
| DE102015210633B4 (en) | 2021-11-04 |
| DE102015210633A1 (en) | 2015-12-17 |
| JP6175408B2 (en) | 2017-08-02 |
| GB2528746B (en) | 2017-06-14 |
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