JP2021160526A - Information acquisition device - Google Patents

Abstract

To properly operate an external device and an on-vehicle device when a diagnostic device is connected.SOLUTION: An information acquisition device 100 connected to an on-vehicle device 201 connected to a diagnostic device 301 outside a vehicle and capable of being diagnosed, and having a function of acquiring information from the on-vehicle device 201 outputs a signal of making the diagnostic device 301 wait for diagnostic operation while acquiring information from the on-vehicle device 201 when the diagnostic device 301 is connected to start diagnosis, and directly connects the diagnostic device 301 with the on-vehicle device 201, and outputs a signal of releasing waiting of diagnostic operation after acquisition operation of information by the information acquisition device 100 is completed.SELECTED DRAWING: Figure 1

Description

The present invention relates to an information acquisition device that acquires information from an in-vehicle device.

For example, there is a device in which an in-vehicle device mounted on a vehicle for performing engine control, brake control, etc. of the vehicle is diagnosed by a failure diagnosis device connected via a connector for the failure diagnosis device. In addition, an external device (information acquisition device) that is connected to the connector for the above-mentioned failure diagnosis device to acquire, record, or display information such as the engine speed and fuel consumption during running from the vehicle is known. There is. Further, there is known a technique for enabling the above-mentioned external device and the failure diagnosis device to be connected at the same time and disabling other external devices when the failure diagnosis device is connected (for example, Patent Document 1). reference.).

Japanese Unexamined Patent Publication No. 2017-47757

However, the inventors of the present application, when the other external device is disabled when the diagnostic device is connected as described above, when the diagnostic device is connected at the timing when the external device is operating, the external device is used. I came to think that the operation of the device and the in-vehicle device may not be performed properly.

In view of the above points, it is an object of the present invention to ensure that the external device and the in-vehicle device are properly operated when the diagnostic device is connected.

In order to achieve the above object, the present invention
An information acquisition device that is connected to an in-vehicle device capable of being diagnosed by being connected to a diagnostic device outside the vehicle and has a function of acquiring information from the in-vehicle device.
It has first and second connecting portions that are connected to the in-vehicle device and the diagnostic device, respectively.
When the diagnostic device outputs a diagnostic device signal transmitted to the vehicle-mounted device while information is being acquired from the vehicle-mounted device in a state where the first and second connecting portions are not connected to each other. , Outputs a signal to the diagnostic device to wait for the operation following the output of the diagnostic device signal, and after the operation of acquiring information from the in-vehicle device is completed, the first and second connection portions are connected to each other and the diagnostic operation is performed. It is characterized by outputting a signal for canceling the standby mode.

As a result, even if the diagnostic device is connected and a signal or the like for diagnosing the in-vehicle device is output when the information acquisition device is acquiring information from the in-vehicle device, the diagnostic operation is temporarily made to stand by and the in-vehicle device is put on standby. Since the standby for the diagnostic operation is released after the operation for acquiring the information from the device is completed, the operation of the external device or the in-vehicle device can be appropriately performed.

According to the present invention, when the diagnostic device is connected, the operation of the external device or the in-vehicle device can be appropriately performed.

It is explanatory drawing which shows the structure of the information acquisition apparatus connected to a vehicle and a diagnostic apparatus. It is a flowchart which shows the operation of an information acquisition apparatus.

As an embodiment of the present invention, the information acquisition device 100 as shown in FIG. 1 is a diagnostic device connected from outside the vehicle when acquiring information from the in-vehicle device 201 mounted on the vehicle 200 or when servicing the vehicle 200. An example in which the in-vehicle device 201 and the like are diagnosed by the 301 will be described. In FIG. 1, the information acquisition device 100 is drawn separately from the vehicle 200 for convenience, but it is actually provided in the vehicle 200.

The in-vehicle device 201 provided in the vehicle 200 is called an ECU or the like, and a plurality of the in-vehicle devices 201 are provided to control the engine, the brake, and the like. These in-vehicle devices 201 are connected to the information acquisition device 100 and the diagnostic device 301 from, for example, a bus 202 called a CAN bus via a connector 203. Here, when the information acquisition device 100 is not used, the connector 203 of the vehicle 200 and the connector 302 of the diagnostic device 301 are connected so that the diagnosis of each in-vehicle device 201 can be performed. It has become.

Specifically, for example, the information acquisition device 100 is directly connected or connected in parallel to the connector 111 connected to the connector 203 of the vehicle-mounted device 201 and the connector 112 connected to the connector 302 of the diagnostic device 301. The relays 101 and 102 are provided. The information acquisition device 100 also has interfaces 103 and 104 for transmitting and receiving signals between the vehicle 200 and the diagnostic device 301, a processing unit 105 for processing acquired information, and a display based on the acquired information and the like. A display unit 106 for performing information processing and a communication unit 107 for communicating acquired information and the like with other devices are provided.

The relays 101 and 102 of the information acquisition device 100 are controlled to be turned on and off depending on whether or not the other end of the exciting coil whose one end is connected to the power supply is grounded by the processing unit 105. There is. When the relays 101 and 102 are OFF, the processing unit 105 communicates with the in-vehicle device 201 via the interface 103 to perform processing such as acquisition of information from the in-vehicle device 201, and the diagnostic device via the interface 104. It is designed to communicate with 301. Further, when the relays 101 and 102 are ON, the signal received via the interfaces 103 and 104 is monitored, and the conductive body of the relays 101 and 102 is detected depending on whether or not they match. ing.

The processing unit 105 is configured to perform processing in, for example, the following information acquisition mode and, although not essential, a simple diagnosis mode.

In the information acquisition mode, a command for acquiring information is transmitted to each in-vehicle device 201, and the information sent from each in-vehicle device 201 is acquired accordingly. The acquired information is processed by the processing unit 105 as necessary, and is displayed on the display unit 106, for example, or by wired or wireless communication by the communication unit 107 to other devices such as a server or a mobile terminal via a network. Etc. are transmitted, and various processes and accumulations are performed.

More specifically, the above-mentioned information acquisition mode is a mode in which information based on the acquired "vehicle signal" is sent to the server. The vehicle signal is, for example, a signal (signal indicating engine speed, vehicle speed, mileage, etc.) periodically transmitted by an in-vehicle ECU for an engine or the like. Further, the signal indicating the state of the vehicle may include, for example, a signal indicating door opening / closing, engine start / stop, vehicle speed, mileage, and the like. By sending information according to the usage status of the users of these vehicles to the server, for example, the server side handles this information as a part of big data, for example, analysis such as analysis of the driving status of the driver. Can be used as a material for carrying out. That is, for example, it is possible to analyze how much the ratio of drivers with a high degree of safe driving is, how much distance is traveled in one driving, and the like.

Further, in the simple diagnosis mode, for example, a diagnosis command is sent from the processing unit 105 to each in-vehicle device 201, and each in-vehicle device 201 is diagnosed based on the information returned to the command. Here, the word "simple" is used for convenience to distinguish it from the diagnosis by the diagnostic device 301, but the same diagnostic operation as the diagnostic device 301 may be performed even in the simple diagnostic mode. However, unlike the diagnostic device 301, the information acquisition device 100 is usually easy to be connected at all times, and is therefore particularly useful for continuous diagnosis regardless of whether it is literally simple or not.

The simple diagnostic mode is a mode in which information acquired by so-called "diagnosis communication" is sent to a server. More specifically, the information acquired by the above-mentioned diagnostic communication is information acquired by the information acquisition device 100 using the diagnostic communication to the in-vehicle ECU, and is, for example, five digits. Consists of alphanumeric characters. Specifically, for example, if the information acquisition device 100 acquires a code P0201 (a failure of the fuel injection system) from the engine using diagnostic communication, the information acquisition device 100 uses the acquired failure code "P0201" as a server. By sending, various measures and analyzes can be performed.

The information acquired by the above-mentioned diagnostic communication is failure information, and is different from the above-mentioned "vehicle signal" indicating the state of how the vehicle is being used in that it is possible to know where and how the vehicle is out of order. More specifically, for example, the information acquired by the diagnostic communication is the information as a result of diagnosing each controller mounted on the vehicle by using a special communication called the diagnostic communication in the CAN. That is, it is a signal such as "Fuel injection system failure (P0201)". More specifically, in the example related to the exterior lamp, the lamp simply fails as shown in the following (Table 1) from the diagnosis. Instead, information such as "power circuit failure of the right lamp" can be obtained by diagnostic communication.

When various information acquisition operations are performed from the in-vehicle device 201 in the information acquisition mode or the simple diagnosis mode as described above, the connector 302 of the diagnostic device 301 is connected to the connector 112 to perform diagnosis by the diagnostic device 301. Occasionally, the processing unit 105 of the information acquisition device 100 performs the following operations.

(S101) First, even if the relays 101 and 102 are turned off and the diagnostic device 301 is connected, the relays 101 and 102 are not directly transmitted to the in-vehicle device 201.

(S102) It is confirmed whether or not a diagnostic device signal such as a diagnostic command for diagnosing the vehicle-mounted device 201 is output from the diagnostic device 301. The diagnostic device signal is not limited to the signal of the operation itself related to the diagnosis, but is a signal transmitted from the diagnostic device 301 to the in-vehicle device 201 prior to the start of the operation related to the diagnosis. For example, the connector 302 of the diagnostic device 301 provides information. It may also include a signal output when connected to the connector 112 of the acquisition device 100 or the connector 203 of the vehicle 200, a signal for notifying the start of diagnosis, and the like.

(S103) If the diagnostic device signal is not output, if processing including the information acquisition operation in the information acquisition mode or the simple diagnostic mode is performed in the information acquisition device 100, specifically, for example, the CAN of the vehicle. If the request to the bus is being transmitted, the process is maintained in the state of being continued, and the process returns to (S102). ..

(S104) When it is determined in the above (S102) that the diagnostic device signal is output from the diagnostic device 301, the information acquisition mode in the information acquisition device 100 and the information acquisition operation in the simple diagnostic mode are then included. It is determined whether or not the processing is performed, and if it is not performed, the process proceeds (S107) and the diagnostic operation by the diagnostic device 301 is performed.

(S105) On the other hand, in the above (S104), when the process including the information acquisition operation is performed, a hold response is output to the diagnostic device 301 to wait for the actual start of the diagnostic operation, and the information acquisition device. The information acquisition operation by 100 is continued. The hold response is a response for making the vehicle stand by so that an appropriate operation is performed after that even if the diagnostic device signal output from the diagnostic device 301 is not immediately transmitted to the vehicle 200, and is a signal directly instructing the standby. Is output, a signal requesting the retransmission of the diagnostic device signal may be output, or a response signal may not be returned within a range that does not time out.

(S106) Next, it is determined whether or not the information acquisition operation is completed, and until the information acquisition operation is completed, the output of the hold response of the above (S105), the information acquisition operation, and the determination of whether or not the information acquisition operation is completed. And are repeated. Depending on the command system or the like, after outputting the hold response only once, only the information acquisition operation and the determination of whether or not the information acquisition operation is completed may be repeated.

(S107) When the information acquisition operation by the information acquisition device 100 is not in progress or when the information acquisition operation is completed, the diagnostic operation by the diagnostic device 301 is performed. That is, first, after the signal diagnostic device signal such as the diagnostic command output from the diagnostic device 301 in the above (S102) is output to the in-vehicle device 201, or before or after the phase, the relay 101 is turned on and the diagnostic device is turned on. Communication between the 301 and the vehicle-mounted device 201 is made to take place directly via the relay 101. Instead of outputting the diagnostic device signal to the in-vehicle device 201, the diagnostic device 301 may be requested to retransmit the diagnostic device signal. Further, as will be described later, once a conduction failure of the relay 101 is detected, the relay 102 may be turned on first until a predetermined reset or the like is performed.

(S108) After that, during the diagnosis operation by the diagnostic device 301, it is determined whether or not the signals input to the interfaces 103 and 104, that is, the signals on both sides of the contacts of the relay 101 match.

(S109) If the signals on both sides of the contact of the relay 101 do not match, it is considered that the continuity of the contact is poor. Therefore, the relay 101 is turned off, the relay 102 is turned on, and the diagnostic device 301 is turned on. Communication between the vehicle and the vehicle-mounted device 201 is ensured.

(S110) The determination of whether or not the diagnostic operation by the diagnostic device 301 is completed is repeated, and if it is completed, the process returns to (S101), the relays 101 and 102 are turned off, and then the information acquisition operation by the information acquisition device 100 is performed. Is made possible.

As described above, when the information acquisition device 100 is acquiring information from the in-vehicle device 201, even if the diagnostic device 301 is connected and a signal or the like for diagnosing the in-vehicle device 201 is output, the diagnosis operation is once performed. Since the device is put on standby, the information acquisition device 100 and the in-vehicle device 201, which are external devices, are appropriately operated.

Further, when the diagnosis is performed, the diagnostic device 301 and the in-vehicle device 201 are directly connected, so that the responsiveness and reliability are improved as compared with the case where commands from each device are interpreted and relayed by software, for example. Can be easily increased, and the security of the entire system can be easily increased.

(Other matters)
In the above example, the diagnostic device 310 and the in-vehicle device 201 are connected by the relays 101 and 102, but the present invention is not limited to this, and the diagnostic device 310 and the in-vehicle device 201 may be connected by a non-contact element such as a semiconductor switch. good. Even in that case, it is useful to detect the malfunction and switch to another connection portion as described above in terms of improving the reliability. On the other hand, when the required reliability can be ensured, it is not always necessary to perform the above detection and switching. Further, the number of relays and the like is not limited to two, and more relays and the like may be switched.

100 Information acquisition device 101 Relay 102 Relay 103 Interface 104 Interface 105 Processing unit 106 Display unit 107 Communication unit 111 Connector 112 Connector 200 Vehicle 201 In-vehicle device 202 Bus 203 Connector 301 Diagnostic device 302 Connector

Claims (5)

An information acquisition device that is connected to an in-vehicle device capable of being diagnosed by being connected to a diagnostic device outside the vehicle and has a function of acquiring information from the in-vehicle device.
It has first and second connecting portions that are connected to the in-vehicle device and the diagnostic device, respectively.
When the diagnostic device outputs a diagnostic device signal transmitted to the vehicle-mounted device while information is being acquired from the vehicle-mounted device in a state where the first and second connecting portions are not connected to each other. , Outputs a signal to the diagnostic device to wait for the operation following the output of the diagnostic device signal, and after the operation of acquiring information from the in-vehicle device is completed, the first and second connection portions are connected to each other and the diagnostic operation is performed. An information acquisition device characterized by outputting a signal for canceling the standby mode. The information acquisition device according to claim 1.
After the operation of acquiring information from the in-vehicle device is completed, the diagnostic device signal output from the diagnostic device is output to the in-vehicle device, and the first and second connection portions are connected to each other. Information acquisition device. The information acquisition device according to any one of claims 1 to 2.
The first and second connection portions are information acquisition devices characterized in that they are connected by a relay or a semiconductor switch. The information acquisition device according to claim 3.
An information acquisition device characterized in that a plurality of relays or semiconductor switches are provided in parallel. The information acquisition device according to claim 4.
An information acquisition device that detects whether the signals at both ends of a relay or semiconductor switch match, and if they do not match, switches to another relay or semiconductor switch.

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