JP6883311B2 - Power controller and program - Google Patents

Description

The present invention relates to a power supply control device and the like.

Vehicles such as automobiles in recent years have connectors such as OBD connectors (hereinafter, "vehicle-mounted connectors") that can be connected to networks such as CAN (hereinafter referred to as "vehicle-mounted networks") that connect one or more computers (for example, engine ECUs). In some cases). In many cases, an in-vehicle connector is not only a terminal for transmitting and / or receiving a signal to an in-vehicle network (sometimes referred to as a "signal terminal"), but also a power source for a vehicle such as a car battery or an alternator ("" It has a terminal (sometimes referred to as a "power supply terminal") for connecting to an in-vehicle power supply. Therefore, it is possible to supply power to the external device from the power supply terminal.

However, if power is supplied to an external device from an in-vehicle power source regardless of the state of the vehicle, the battery may run out due to, for example, long-term parking. Therefore, a power supply control device that controls power supply to an external device according to the state of the vehicle has been proposed (for example, Patent Documents 1 and 2).

Patent Document 1 discloses a power supply control device that supplies power to an external device when noise on the power supply voltage is detected by an alternator or the like. Patent Document 2 transmits a response request signal to the vehicle-mounted network when detecting noise in the power supply voltage, and receives an external response output signal (for example, a response output signal from the engine ECU). Disclose a power control device that supplies power to a device. In Patent Document 2, the state of the vehicle can be determined more accurately by controlling the power supply using not only the noise of the power supply voltage but also the response output signal. Patent Document 2 further discloses that the power supply is cut off when the response output signal cannot be received from the vehicle-mounted network. In Patent Document 2, instead of the noise of the power supply voltage, it is conceivable to transmit a response request signal triggered by a wake-up of CAN.

Japanese Unexamined Patent Publication No. 11-22284 JP 2012-148717

The present inventor may generate noise in the power supply voltage for some reason even when the key is not inserted (for example, the engine is turned off and parked in a gasoline car and there is no occupant). , Found that it affects the current usage of the vehicle. For example, some vehicles and car accessories in recent years are, for example, gasoline-powered vehicles that are parked with the engine turned off and operate even when there are no occupants (for example, security-related electrical components), and such external devices. There may be noise in the power supply voltage when the is operated. When the power supply control device of Reference 2 detects these noises, it transmits a response request signal to the vehicle-mounted network, so that a part or all of the system connected to the vehicle-mounted network (for example, a body-based ECU) or all of them. Wake up and the current flowing through the equipment connected to the in-vehicle network increases. If such noise occurs frequently, for example, it is conceivable that the battery will run out even when the engine is turned off and the vehicle is parked in a gasoline-powered vehicle and there are no occupants.

Further, when the ignition is turned off, the engine ECU normally does not transmit a response signal to a signal from the outside. Therefore, it is possible to detect that the ignition is off by the response signal from the engine ECU. However, some vehicles, such as imported cars and recent vehicles, send a response signal to an external signal for a while after the ignition is turned off, and the response signal alone can be used to keep the ignition off. The present inventor has found that there is a problem that cannot be accurately determined.

It is conceivable to monitor the ignition switch directly with an external input line, but it is difficult for a general user without specialized knowledge to perform such wiring.

The present application discloses inventions that address all or part of the above problems or other problems.

The present application discloses, for example, the inventions described in the following configuration examples.

<Structure example 1>
When the noise of the power supply supplied from the vehicle is detected and the signal flowing through the in-vehicle network is detected, the consultation signal is transmitted to the in-vehicle network.
It is characterized by having a power supply control function that starts power supply to an external device based on the power supply supplied from the vehicle when a predetermined power supply condition is satisfied based on a response signal flowing through the vehicle-mounted network after transmission of the consultation signal. Power control equipment.

In this way, when the noise of the in-vehicle power supply is detected and the signal of the in-vehicle network is detected, the consultation signal is transmitted to the in-vehicle network. Therefore, when the noise of the in-vehicle power supply is detected, the consultation signal is unconditionally transmitted. Compared to the case of transmission, the consultation signal does not cause the computer on the in-vehicle network to wake up, and the current consumption of the vehicle can be reduced. In particular, it is possible to reduce the dark current, which is the current that generally flows when the ignition switch is in the OFF position, for example, when the vehicle is sleeping, for example, when the engine is turned off in a gasoline vehicle and the vehicle is parked and there is no occupant. , So-called dead battery can be prevented. In particular, it exerts an excellent effect in a vehicle having an in-vehicle computer that wakes up when a consultation signal flows through the in-vehicle network. This is particularly effective in a vehicle in which a plurality of in-vehicle computers wake up when a consultation signal flows through the in-vehicle network.
In particular, the consultation signal may be transmitted when a signal of the vehicle-mounted network is detected after detecting noise of the vehicle-mounted power supply. The consultation signal may be transmitted, for example, when all or part of the computer connected to the in-vehicle network (for example, the body ECU) detects a signal flowing in a state where the computer is already waked up. , It is preferable that the situation where the computer or the like in the sleep state wakes up by the consultation signal can be more accurately avoided. The consultation signal is, for example, when a signal indicating that all or part of the computer connected to the in-vehicle network is sleeping is detected, or all or part of the computer connected to the in-vehicle network wakes up. When only a signal that does not indicate that it is flowing is flowing, it is better not to transmit it, and in this way, it is possible to more accurately avoid the situation where the computer etc. in the sleeping state wakes up by the consultation signal. It's good because it can be done.

Further, in the configuration example 1, in addition to detecting the noise of the vehicle-mounted power supply and the signal flowing through the vehicle-mounted network, when it is determined that the power supply condition is satisfied based on the response signal flowing through the vehicle-mounted network after the consultation signal is transmitted, the external device is sent. Even if noise occurs in the power supply voltage for some reason while the vehicle is in a sleep state (for example, the ignition switch is not turned on), power is supplied to an appropriate external device according to the vehicle condition. It is good because it can be controlled.

The power supplied from the vehicle may be, for example, a power source directly or indirectly connected to the battery or alternator of the vehicle. Power supply noise is, for example, noise due to power generation due to engine rotation such as alternator noise, spike noise such as ignition noise that occurs when the plug is ignited, cell start or ignition switch at the IG position or ACC position. It is advisable to use voltage drop noise due to inrush current to various devices in the vehicle that occurs when the voltage drops when switching or when the door is unlocked. The in-vehicle network may be, for example, CAN, FlexRay, or the like. The signal flowing through the in-vehicle network may be obtained from a connector for detachably connecting a power supply control device or another device. The connector may be a connector having a signal terminal and a power supply terminal. Both the power supplied from the vehicle and the signal of the in-vehicle network may be obtained from the connector. In this way, both the noise of the vehicle-mounted power supply and the signal of the vehicle-mounted network can be obtained from one connector. The connector may be an OBD connector.

If no data appears on the in-vehicle network within a certain period of time (particularly about 1 sec) from the noise detection of the power supply supplied from the vehicle, the power supply control device may shift to sleep. By doing so, the current consumed by this device can also be reduced. It is advisable to inspect the signal of the in-vehicle network only for a certain period of time after detecting the noise of the power supply supplied from the vehicle, and stop the inspection after the certain period of time has passed. For this fixed time, if there is no response even though the data continues to flow on the in-vehicle network after the consultation signal is transmitted, it is advisable to retry several times and re-consult when the next noise signal is detected. (For example, in a vehicle in which the CAN starts to operate when the ignition switch is set to the ACC position, there is no response even if the engine ECU is consulted after detecting noise at the ACC position. The ignition on state (for example, the ignition switch is set). If you continue to consult until the IG position), even if the ignition switch is turned off after that, the vehicle will not go to sleep because there will be a consultation. If you re-consult after noise detection, the ignition switch will be in the ACC position. It is possible to receive a response by re-consulting with the engine start noise when the engine starts from the IG position. The vehicle can go to sleep because it does not consult even if the ignition switch changes from the ACC position to the OFF position). It is even better that the power supply determination function inspects the signal of the in-vehicle network only for a certain period of time after the consultation signal is transmitted, and does not inspect the signal after the elapse of the certain time.

The power supply condition may be, for example, a condition related to information included in the response signal and characteristics of the response signal (for example, frequency, frequency, amplitude, parameter, identification information, number of identification information, etc.). The power supply condition should be judged from the response signal or the signal flowing on the in-vehicle network (for example, if the external device is a radar detector, the signal flowing on the in-vehicle network when the ignition switch is in the IG position, the external device navigates. If so, the power supply condition should be that the signal that flows on the in-vehicle network when the ignition switch is in the ACC position is detected, and if the external device is a security-related device, the door lock signal from the remote control is detected). The power supply control function may control to start power supply from the in-vehicle power supply to the external device when it is determined that the power supply condition is satisfied. The power supply control function is, for example, when there is a response signal indicating that the ignition switch of the vehicle is in the IG position or the vehicle is running (for example, when the engine speed is not 0 rpm), or such a response signal. When it is presumed that there is, it is good to judge that the power supply condition is satisfied. It is advisable to turn off the power supply when it is detected that the engine speed has reached 0 rpm (the engine has stopped). However, in the case of an idling stop vehicle, there is a problem that the power of the external device is turned off each time the vehicle stops at an intersection (idling stop). In this case, it is preferable not to determine that the power supply condition is satisfied when the engine speed is 0 rpm. The external device may be a device that is not intended to be used in any state other than the above. For example, a radar detector is not intended to be used in any other state, so if the external device is a radar detector, power is supplied only in the above states to effectively reduce the current used. It's good because it can be done. The power supply control function satisfies the power supply condition, for example, when there is a response signal indicating that the vehicle is in the ignition on state (for example, the ignition switch is in the ACC position or the IG position, or when it is presumed to be present). The external device may be a device intended to be used in these states. For example, the navigation system may be used even in the ACC state, so that the external device is the navigation system. In this case, the current used can be effectively reduced by supplying power only in the above state.

The power control device may have a connector that can be detachably connected to the in-vehicle network. The power control device may have a connector or cable that can be detachably connected to an external device. The power control device may have hardware or software such as a switch for switching the supply / cutoff of power to the external device. The power control device may be a power adapter. The power control device may have a storage medium that stores data and programs such as power supply conditions for realizing each function of the power control device. The storage medium may be a volatile or non-volatile storage medium. The volatile medium may be, for example, RAM. The non-volatile medium may be, for example, EEPROM. The power control device may have a control unit such as a CPU for executing the above program and / or realizing each function of the power control device.

<Structure example 2>
The power supply control device is characterized in that the power supply determination function determines whether or not the power supply condition is satisfied based on the parameters of the response signal.

By doing so, it is possible to facilitate and accurately determine the success or failure of the power supply condition. For example, the power supply determination function may determine that the power supply condition is satisfied when a response signal including a specific parameter is detected. For example, when the vehicle is in a specific state (for example, the ignition is on), if it is known that a response signal including a specific parameter flows to the in-vehicle network in response to the consultation signal, the specific parameter is detected. By determining that the power supply condition is satisfied at that time, power can be supplied to the external device only when the vehicle is in the specific state.

The parameter may be, for example, the content of the data contained in the signal. For example, in the case of packet communication, the parameter may be the state of a specific bit of the packet. For example, in a specific vehicle type, when the vehicle is in a specific state, it is known that a response signal in which a specific bit (for example, the fifth bit of the fifth byte of the data part of the packet) is "1" is transmitted. If so, if it is determined that the power supply condition is satisfied when the specific bit detects the signal of "1", power can be supplied to the external device when the vehicle is in the specific state.

As another aspect, the power supply determination function may determine whether or not the power supply condition is satisfied based on the cycle of the response signal. For example, it may be determined that the power supply condition is satisfied when the response signal is detected in a short cycle that can be obtained during engine operation, or when the detection frequency of the response signal is as high as that during engine operation. .. For example, if the signal of the engine ECU is a vehicle having a shorter cycle than other signals, the cycle or frequency when the engine ECU is waked up may be used. By doing so, it is possible to control the power supply to the external device when the engine ECU is waked up.

<Structure example 3>
The power supply control device is characterized in that the power supply determination function determines whether or not the power supply condition is satisfied based on the identification information of the response signal.

By doing so, it is possible to further facilitate and accurately determine the success or failure of the power supply condition. For example, it is advisable to determine the success or failure of the power supply condition based on whether or not a signal including specific identification information is flowing in the vehicle-mounted network. For example, when a signal including specific identification information is flowing in the in-vehicle network, it is preferable to make a judgment in the direction in which the power supply condition is satisfied. The determination in the direction in which the power supply condition is satisfied may be determined when the power supply condition is satisfied when the condition of the configuration example 3 is satisfied, and when other conditions (for example, the condition of the configuration example 2) are satisfied at the same time. It may be determined that the power supply condition is satisfied. The identification information may be, for example, information for identifying the computer that transmitted the response signal. For example, in a specific vehicle type, if it is known that a signal having specific identification information flows through the in-vehicle network when the vehicle is in a specific state, the power supply condition is satisfied when the signal including the identification information is detected. By determining that the vehicle has been used, it is possible to supply power to the external device when the vehicle is in the specific state. Alternatively, for example, in a specific vehicle type, if it is known that, in a specific state of the vehicle, a signal having the second identification information flows to the in-vehicle network with respect to the consultation signal of the first identification information. By determining that the power supply condition is satisfied when the signal including the second identification information is detected, it is possible to supply power to the external device when the vehicle is in the specific state. The first identification information and the second identification information may be the same or different. It is preferable that the first identification information and the second identification information have a certain relationship. For example, depending on the manufacturer and the type of vehicle, a response signal having an identification number obtained by adding "8" to the identification number of the consultation signal may be output. For such manufacturers and vehicles, the first identification information plus "8" may be used as the second identification information. For example, when the second identification information having a certain relationship is detected, it may be determined that the power supply condition is satisfied. When the second identification information having no certain relationship is detected, it may not be determined that the power feeding condition is satisfied.

<Structure example 4>
The power supply control device is characterized in that the power supply determination function determines whether or not the power supply condition is satisfied based on the number of identification information of the response signal.

In this way, it is possible to further facilitate and accurately determine the success or failure of the power supply condition. For example, when the number of types of identification information included in the response signal flowing through the vehicle-mounted network is a certain number or more, it is preferable to make a judgment in the direction in which the power supply condition is satisfied. The determination in the direction in which the power supply condition is satisfied may be determined that the power supply condition is satisfied when the condition of the configuration example 4 is satisfied, and other conditions (for example, the conditions of the configuration examples 2 and 3) are satisfied at the same time. At that time, it may be determined that the power supply condition is satisfied. For example, in a specific vehicle type, if it is known that the number of identification information or the number of types is a certain number or more in a specific state of the vehicle, the power supply condition is satisfied when the number is a certain number or more. By determining that, it is possible to supply power to the external device when the vehicle is in the specific state.

<Structure example 5>
The power supply condition setting function for setting the power supply condition and
It further has a setting condition storage function for storing the power supply condition set by the power supply condition setting function.
The power supply control device is characterized in that the power supply determination function determines whether or not the power supply condition is satisfied based on the power supply condition stored in the setting condition storage function.

By doing so, it is possible to set the power supply condition. For example, even if the specifications of the in-vehicle network (for example, the specifications of what kind of signal flows in the in-vehicle network according to the state of the vehicle) change due to a new release or a model change, the condition setting function is used. Since it is possible to set the power supply conditions for new vehicles and other vehicle types, it is good because it enables flexible support for vehicles of various vehicle types and manufacturers.

<Structure example 6>
The power supply condition setting function is a power supply control device characterized in that the power supply condition is set based on a user's operation.

By doing so, the user can arbitrarily set the power supply condition. For example, when the user wants to use the power supply control device for a newly released vehicle model, the user obtains the power supply condition of the newly released vehicle model from, for example, the manufacturer of the power supply control device, and uses the power supply condition setting function to set the power supply condition. It is good because it can be set. The method of acquisition may be, for example, downloading from a website or distribution of media such as an SD card.

<Structure example 7>
The power supply condition setting function is a power supply control device characterized in that the power supply condition is set based on an operation performed by a user on the external device.

In this way, the power supply condition can be set by operating the external device, which improves the convenience and operability of the user, and the power supply control device does not need to have a member for operation. Therefore, it is possible to reduce the size and cost of the power supply control device. The external device may have a user interface for operating an output device such as a liquid crystal monitor or an input device such as a touch panel. The power supply condition setting function may display a screen for receiving an input of the power supply condition setting on the output device of the external device. The power supply terminal is often in a position that is difficult for the user to operate, while the external device is often in a position that is easy for the user to operate. In 7, the user does not have to perform the operation at a position where it is difficult to operate.

<Structure example 8>
A first information storage function that stores information about a signal flowing through the in-vehicle network when the vehicle is in the first state,
A second information storage function that stores information about a signal flowing through the vehicle-mounted network when the vehicle is in a second state different from the first state.
With more
The power supply condition setting function is a power supply control device characterized in that the power supply condition is set based on the information stored in the first information storage function and the information stored in the second information storage function.

By doing so, it is possible to automatically set the power supply condition based on the information stored in the first information storage function and the information stored in the second information storage function. For example, the first state may be the ignition on state (for example, the ignition switch is in the IG position), and the second state may be the ignition off state (the ignition switch is in the OFF position or the ACC position).

The first information storage function may store information about all signals flowing through the vehicle-mounted network in the first state. The second information storage function may store information about all signals flowing through the vehicle-mounted network in the second state. In particular, the storage time in the first state and the second state may be the same time. For example, if the power supply condition is determined using the information of the difference between the information of the first information storage function and the information of the second information storage function, the power supply condition may be easily determined. In particular, if the power supply condition is determined using the identification information of the difference between the information of the first information storage function and the information of the second information storage function, the determination of the power supply condition may be particularly easy. Specifically, for example, the identification information remaining when the identification information of all the signals flowing in the first state is excluded from the identification information of all the signals flowing in the second state. It is better to use. For example, the power supply determination function may determine that the power supply condition is satisfied when the response signal includes the above-mentioned "remaining identification information". It is conceivable that there will be a plurality of "remaining identification information". In such a case, for example, it is preferable to use the identification information of a signal having a short cycle. In this case, for example, the engine ECU If the signal is a vehicle having a shorter cycle than other signals, it may be possible to more reliably control the power supply to the external device when the engine ECU is waked up. Here, the case where the identification information is used as the information to be stored in the first and second information storage functions has been described, but other parameters (for example, the contents of data) may be used instead of the identification information. For the parameters and data contents, refer to the above explanation.

For example, the power control device (1) instructs the user to put the vehicle in the first state (for example, ACC), and then (2) confirms that the vehicle is in the first state. The operation is requested from the user, (3) information about the signal flowing through the in-vehicle network when the operation is detected is stored in the first information storage function, and (4) the vehicle is stored in the second information storage function for the user. The user was instructed to put the vehicle into a state (for example, the ignition on state), and then (5) the user was asked to confirm that the vehicle was put into the second state, and (6) the operation was detected. Sometimes it is advisable to train by a method such as storing information about a signal flowing through an in-vehicle network in a second information storage function. If the display of these instructions and the acceptance of operations are performed using an external device, the power supply control device may be simplified. For example, in (1), the user is instructed to connect the power supply control device to the in-vehicle network in the first state, and / or, in (2) and (5), the first and second states, respectively. If the power supply control device automatically detects that the above has occurred, the user's operation may be easier. The second state may be determined by transmitting a consultation signal from the power supply control device to the in-vehicle network and receiving a response signal to the consultation signal. In addition, the above procedure can be changed as appropriate.

<Structure example 9>
A power supply condition storage function that stores a plurality of the power supply conditions and
It further has a power supply condition selection function for selecting any of the power supply conditions stored by the power supply condition storage function.
The power supply control device is characterized in that the power supply determination function determines whether or not the power supply condition is satisfied based on the power supply condition selected by the power supply condition selection function.

In this way, one of a plurality of power supply conditions can be selected, and power is supplied to the external device when the selected power supply condition is satisfied. Therefore, for example, which one is used according to the specifications (for example, the condition of the vehicle). It is preferable that the power supply can be controlled more flexibly according to a plurality of types of vehicles having different (specifications on whether such a signal flows through the in-vehicle network). For example, if the conditions for determining the state of the vehicle are determined by the vehicle type and manufacturer, the conditions for each vehicle type and manufacturer can be stored as power supply conditions so that the power supply conditions can be selected according to the vehicle type and manufacturer. In this case, it is possible to supply power to an external device according to the state of the vehicle for a plurality of types of vehicles and vehicles of manufacturers. The power supply condition selection function may be able to select a plurality of power supply conditions. In that case, for example, power supply may be started when any one of the selected power supply conditions is satisfied, or power supply may be started when all or two or more of the selected power supply conditions are satisfied. ..

<Structure example 10>
A switch capable of selecting one or a plurality of first switching states corresponding to the one or a plurality of the power feeding conditions and one or a plurality of second switching states.
It also has a first special power supply function,
When the switch selects any of the first switching states, the power supply control function determines that the power supply condition corresponding to the selected first switching state is satisfied. Powers the external device and
When the switch selects any of the second switching states, the first special power supply function receives the external device from the vehicle-mounted power supply regardless of whether or not the power supply condition is satisfied by the power supply determination function. A power supply control device characterized by supplying power to a power supply.

In this way, the user may be able to secure the power supply to the external device by setting the switch to the second switching state, regardless of the success / failure judgment by the power supply judgment function. As a result, even when the power supply control device is used in a vehicle in which the power supply condition is not stored or set in the power supply control device (for example, a newly released vehicle model), the user can switch to the second switching state to externally. It is good because the power supply to the device can be secured. Therefore, it is possible to prevent the dilemma that the power supply condition cannot be set because the power supply condition is not stored or set, and the power supply condition cannot be set because the power supply condition is not supplied. The switch may be, for example, a DIP switch.

<Structure example 11>
When there is a transition from a disconnected state in which power cannot be supplied to an external device by the power supply control function to a connected state in which power can be supplied to an external device by the power supply control function, the power supply determination function is used. A power supply control device further having a second special power supply function for supplying power from the vehicle-mounted power supply to the external device regardless of whether or not the power supply condition is satisfied.

In this way, when the state shifts from the disconnected state to the connected state, it is possible to secure the power supply to the external device regardless of the success / failure judgment by the power supply determination function. As a result, even when the power supply control device is used in a vehicle in which the power supply condition is not stored by the condition storage function (for example, a newly released vehicle model or a vehicle of a new manufacturer), the power supply control device is shifted from the disconnected state to the connected state. This is good because the power supply to the external device can be secured. Therefore, it is possible to prevent the dilemma that the power supply condition cannot be set because the power supply condition is not set and the power supply condition cannot be set because the power supply condition is not set. The disconnected state may be a state in which the power supply control device is disconnected from the vehicle-mounted network, and the connected state may be a state in which the power supply control device is connected to the vehicle-mounted network. The transition from the disconnected state to the connected state may be performed by, for example, inserting the connector of the power supply control device into the connector of the vehicle-mounted network. In this case, in order to suppress the current consumption due to the continuation of the connected state, it is advisable to automatically shift to the disconnected state by a timer of about several minutes. It is also good to be able to select whether the timer setting is valid or invalid with a DIP switch or the like. The disconnected state may be the state where the battery is dead, and the connected state may be the state where the battery is not dead.

In configuration examples 10 and / or 11 (particularly configuration examples 10 and / or 11 that cite any of configuration examples 5 to 9), power is supplied from the in-vehicle power supply to the external device regardless of the success / failure judgment by the power supply judgment function. If the power supply condition setting function accepts the setting operation while the power supply condition is being set, the setting is performed when there is a high probability that the power supply condition needs to be set, which improves the convenience of the user. ..

<Structure example 12>
A power supply control device, wherein the consultation signal includes identification information for identifying a computer connected to the vehicle-mounted network.

In this way, for example, a computer on the vehicle-mounted network can be designated by the identification information of the consultation signal, and the success or failure of the power supply condition can be determined based on the response signal issued by the designated computer. If the consultation signal includes an identification number for identifying a computer on the in-vehicle network that is operating to supply power to the external device, it may be possible to accurately determine when power should be supplied to the external device. For example, if it is determined that the power supply condition is satisfied when there is a response signal from the engine ECU using a consultation signal having identification information that specifies the engine ECU, it is sent to an external device when the engine ECU is waked up. It is good because it can control the power supply.

<Structure example 13>
The consultation function repeatedly transmits the consultation signal to the in-vehicle network.
The power supply determination function determines the success or failure of the power blocking condition based on the response signal flowing through the vehicle-mounted network after the transmission of any of the consultation signals.
The power supply control function is a power supply control device, characterized in that, when the power supply control function determines that the power shield condition is satisfied, the power supply from the vehicle-mounted power supply to an external device is cut off.

In this way, it may be possible to cut off the power supply from the vehicle-mounted power supply to the external device (for example, end the power supply) based on the response signal. For example, if the response signal cannot be detected, the power supply may be cut off. For example, the consultation function may repeatedly execute the transmission of the consultation signal when the response signal flowing through the vehicle-mounted network is detected after the transmission of the consultation signal. For example, the consultation function may repeatedly execute the transmission of the consultation signal when the response signal flowing through the vehicle-mounted network is detected within a certain period of time after the transmission of the consultation signal. The interval between repetitions of the consultation signal may be a fixed time. In order to appropriately monitor the state of the vehicle and control the appropriate power supply, the fixed time is preferably about 10 milliseconds to 1 second. Each consultation signal may be a signal having the same configuration (for example, the same waveform, frequency, amplitude, parameter, etc.).

The power blocking condition may be different from the power feeding condition. The power supply determination function may determine, for example, that the power blocking condition is satisfied when the signal of a specific parameter or identification number cannot be detected. The power supply determination function may determine, for example, that the power blocking condition is satisfied when the signal of a specific parameter or identification number cannot be detected for a certain period of time or longer. A more specific mode of determining the success or failure of the power blocking condition may be the same as or similar to the above-mentioned aspect regarding the determination of the success or failure of the power feeding condition.

<Structure example 14>
With the constant inspection function that constantly inspects the signals of the in-vehicle network,
Based on the signal detected by the constant inspection function, the vehicle condition determination function that determines the vehicle condition and the vehicle condition determination function
A power supply control device having a second power supply control function for controlling power supply from the vehicle-mounted power supply to an external device based on the determination of the vehicle state determination function.

By doing so, it is sufficient to control the power supply to the external device according to the state of the vehicle determined based on the signal of the vehicle-mounted network. The vehicle condition determination function may determine the vehicle condition based on, for example, signal parameters of the vehicle-mounted network (for example, data content, identification information, number of identification information, etc.). For example, if it is known that a signal containing a specific parameter flows to the in-vehicle network only when the vehicle is in a specific state (for example, an ignition on state), when the signal containing the parameter is detected, the first (2) When the power supply control function supplies power to the external device, it is possible to supply power to the external device when the vehicle is in a specific state. Further, by cutting off the power supply to the external device when the signal including the parameter is not detected, it is possible to cut off the power supply to the external device when the vehicle is not in a specific state. In this way, even if the vehicle responds to an external signal for a while after the ignition is turned off, such as an imported car or a recent vehicle, power is supplied when the ignition is off. It is good because it can be blocked. Further, in an idling stop vehicle, even if the idling stop is performed at an intersection or the like, power is supplied as long as the ignition is on, so that the problem that the power of the external device is turned off each time the idling stop is performed may be solved. As the constant inspection, it is preferable to constantly inspect the signal of the in-vehicle network. For example, the signal of the vehicle-mounted network may be inspected regardless of whether or not noise of the vehicle-mounted power supply is detected.

The invention of the configuration example 14 may be a configuration example that cites any of the configuration examples 1 to 13, or may be an independent configuration example that does not cite any of the configuration examples 1 to 13. In the configuration example 14 in which the configuration example 1 is not quoted, it is not necessary to transmit the consultation signal, and the problem that the current consumption increases due to the wake-up of the computer by the consultation signal can be surely prevented.

<Structure example 15>
The power supply control device is
A communication program that controls the communication of information between the in-vehicle network and the external device,
Program update function and
Have,
The external device has an update information input function for receiving an input of update information from the outside, and a display program for displaying the information received from the power supply control device.
When the update information input function receives the input of the update information, the program update function updates the communication program and the display program as a set.

By doing so, it is sufficient that the program for acquiring the information from the in-vehicle network and displaying the information can be updated as a set. For example, when the power supply control device acquires information on the engine speed, vehicle speed, and water temperature from the in-vehicle network and provides it to an external device, and the external device displays the information on the engine speed, vehicle speed, and water temperature, the outside temperature By using the updated information for displaying additional information, the power supply control device acquires information on engine speed, vehicle speed, water temperature, and outside temperature from the in-vehicle network and provides it to external devices, and the external devices provide these engines. It is preferable that the communication program and the display program can be updated as a set so as to display the information of the number of revolutions, the vehicle speed, the water temperature, and the outside temperature.

The update information may be commands, programs and / or data for updating the communication program and the display program. The updated information may be provided, for example, by downloading from the website of the manufacturer of the power control device. The update information input function may be, for example, a function of inputting update information from the outside to an external device by wire or wirelessly. For example, it is preferable to attach a medium such as an SD card storing the update information to an external device so that the update information can be input.

In the configuration example 15, the power supply control device has a program update function, but the program update function may be possessed by an external device or may be possessed by other devices / devices. For example, as a configuration example of the modified form of the configuration example 15, the following configuration example 15'may be used.
<Structure example 15'>
The power supply control device according to any one of Configuration Examples 1 to 14, which has a communication program for controlling the communication of information between the in-vehicle network and the external device.
An external device having an update information input function for receiving an input of update information from the outside and a display program for displaying the information received from the power supply control device, and an external device having a display program.
It has a program update function and
When the update information input function receives the input of the update information, the program update function updates the communication program and the display program as a set.

<Structure example 16>
A program for realizing the function of the electronic device according to any one of claims 1 to 15 and 15'on a computer.

The configurations described in the above-described configuration examples and the like may be combined and configured within a range that does not cause a contradiction. Further, it is preferable to construct a new configuration example by arbitrarily combining the components described in each configuration example and the like within a range that does not cause a contradiction.

FIG. 1 shows a vehicle 1 equipped with the power supply control device 30 of the first embodiment. FIG. 2 shows the OBD connector 6 and the power supply control device 30. FIG. 3 shows the system configuration of the power supply control device 30 of the first embodiment. FIG. 4 shows a timing chart of transmission / reception of a consultation signal and a response signal to the vehicle-mounted network 7 and power supply to the radar detector 20 in the conventional power supply control device. FIG. 5 shows a timing chart of transmission / reception of a consultation signal and a response signal to the vehicle-mounted network 7 and power supply to the radar detector 20 in the power supply control device 30 of the first embodiment. FIG. 6 shows the number of identification information and identification information included in the signal flowing through the vehicle-mounted network 7 according to the state of the vehicle in the vehicle of a specific vehicle type (vehicle B). FIG. 7 shows the system configuration of the power supply control device 30 of the fourth modified form.

FIG. 1 shows a vehicle 1 equipped with the power supply control device 30 of the first embodiment. The vehicle 1 in FIG. 1 is driven by the engine 2. The rotating shaft of the engine 2 is connected to the alternator 3 by a belt or the like. The alternator 3 generates AC power by rotating the armature. The generated AC power is rectified to direct current, and the direct current output terminal is connected to the positive electrode of the car battery 4. The alternator 3 is not always directly connected to the engine 2. In recent vehicles, there are also known vehicles that control the timing of power generation by the alternator 3 by controlling an ECM (engine control module). The positive electrode of the car battery 4 is connected to the power supply terminal of the OBD connector 6 (Pin 16 in FIG. 2B described later). A power supply control device 30 is connected to the OBD connector 6, and a radar detector 20 which is an external device is further connected to the power supply control device 30.

In the present embodiment, the ignition switch of the vehicle can be switched to any of four positions: OFF position, ACC position, IG position and cell start position. When the ignition switch is in the OFF position or the ACC position, the vehicle is in the "ignition off" state (the engine does not start). When the ignition switch is in the IG position or the cell start position, the vehicle is in the "ignition on" state (the state in which the engine can be started).

The engine sensor 12 and the engine sensor 13 are connected to the engine 2. The engine sensor 12 is a sensor that measures the number of revolutions of the engine 2, and the engine sensor 13 is a sensor that measures the temperature of the engine 2 (for example, engine cooling water temperature, engine oil temperature, intake air temperature, etc.). The tire 8 is the front tire, and the rotation sensor 10 is a sensor that detects the rotation of the tire 8. The tire 9 is a rear tire, and the rotation sensor 11 is a sensor that detects the rotation of the tire 9.

A plurality of in-vehicle computers 5 are connected to the in-vehicle network 7. For example, an in-vehicle computer 5 to which a rotation sensor 10, a rotation sensor 11, and various sensors (not shown) are connected, and an in-vehicle computer 5 connected to an engine sensor 12, an engine sensor 13, and various sensors (not shown) are also connected. There is. The plurality of in-vehicle computers 5 include a plurality of computers such as an engine ECU (hereinafter, may be referred to as “engine computer”) that are activated only when the ignition is on, and when the ignition switch is in the ACC position or at the door. This includes a plurality of computers (hereinafter, may be referred to as "non-engine computers") that are started when the computer is opened or closed. The rotation sensor 10, the rotation sensor 11, the engine sensor 12, the engine sensor 13, and the vehicle-mounted computer 5 are energized and start operating when the ignition key of the vehicle 1 reaches the ACC position or the IG position. The detection results of the rotation sensor 10, the rotation sensor 11, the engine sensor 12, the engine sensor 13, and the like detected by each in-vehicle computer 5 are transmitted to the in-vehicle network 7. Further, each in-vehicle computer 5 determines the state of the engine and the state of the vehicle based on the detection results from various sensors. The state of the vehicle includes that the vehicle is running on a battery or is idling stopped.

The in-vehicle network 7 is a CAN.

The radar detector 20 detects the radar wave emitted by the speed control device, receives as much receivable radio as possible when the radar detector has a radio reception function, and when the radar detector has a GPS reception function. It is a device that notifies the driver of information such as the fixed type control device registered in the device and the control area where the control was performed in the past, and encourages the driver to drive safely.

FIG. 2 shows the OBD connector 6 and the power supply control device 30. The OBD connector 6 has the same shape and pin arrangement called DTC (SAE J1962 standard) beyond the framework of the communication standard. FIG. 2B shows the pin arrangement of the OBD connector 6. There are two types of OBD connectors, type A and type B. Type A is installed within 1 foot (about 30 cm) from the instrument panel of the car (near the steering column) within the range accessible from the driver's seat. Type B is installed within 2.5 feet (about 75 cm) of the instrument panel of the car (such as near the center console) within access from the driver's or passenger seat. The type of the in-vehicle network 7 can be known from the pin arrangement (presence or absence of pins at each position) of the OBD connector 6 shown in FIG. 2 (b). If there is a terminal pin of Pin 7 of the OBD connector 6, it can be determined that the connector is connected to K-Line. If there are terminal pins of Pin 6 and 14 of the OBD connector 6, it can be determined that the connector is connected to the CAN. The Pin 16 is a power supply terminal and is connected to an alternator 3 and / or a car battery 4 which is an in-vehicle power supply. The terminals of the OBD connector 6 other than Pin 16 are hereinafter referred to as signal terminals.

The power control device 30 has a box-shaped housing 51. The housing 51 is made of a material having appropriate strength, such as plastic. The housing 51 has connection portions 52 and 53 and DIP switches 54 on the front and rear side surfaces and the back surface thereof, respectively.

The connection portion 52 has a shape and structure to which the OBD connector 6 can be detachably attached. The connection portion 52 has a terminal corresponding to each Pin of the OBD connector 6.

The connection portion 53 has a shape and structure in which the connection portion 22 at one end of the cable 21 of the radar detector 20 can be detachably and rotatably attached. A radar detector 20 which is an external device is connected to the other end of the cable 21. Since the connection portion 22 can be detachably attached to the connection portion 22, the space inside the vehicle can be saved by removing the cable 21 when the external device is not used. Since the connecting portion 22 is rotatable with respect to the connecting portion 53, convenience such as routing of the cable 21 is improved.

FIG. 2C shows a DIP switch 54 on the back surface of the power supply control device 30. The DIP switch 54 has four setting switches (numbers 1 to 4) for setting the operation of the control unit 31. By turning each switch ON / OFF, the DIP switch 54 can take 16 types of switching states. The switching states 1 to 8 in which the values 0 to 7 taken by the DIP switches Nos. 1 to 3 correspond in order are called the first switching state, and the on / off of the DIP switches No. 4 is called the second switching state. The user can select any of the switching states 1 to 8 according to the vehicle type (or manufacturer) of the vehicle in which the power supply control device 30 is installed.

FIG. 3 shows the system configuration of the power supply control device 30. The power supply control device 30 includes a control unit 31, a storage unit 32, a noise detection unit 33, and a power supply switching unit 34.

The control unit 31 is composed of a computer including a CPU, ROM, RAM, various peripheral circuits, interfaces, and the like. The control unit 31 executes various processes described later by expanding and executing the OS recorded in the ROM and the program stored in the program storage unit 32a on the RAM, and realizes various functions. The signal terminal of the OBD connector 6 and the control unit 23 of the radar detector 20 are connected to the control unit 31, and it is possible to control the transmission and reception of signals between the vehicle-mounted network 7 and the radar detector 20. The control unit 31 is further connected to the noise detection unit 33 and the power supply switching unit 34, and transmits an ON signal / OFF signal described later to the power supply switching unit 34 based on the signal from the noise detection unit 33.

The storage unit 32 is composed of EEPROM, which is a non-volatile memory. The storage unit 32 has a program storage unit 32a and a data storage unit 32b.

The program storage unit 32a stores various programs necessary for realizing various functions (described later) of the power supply control device 30. The program of the program storage unit 32a includes a communication program for controlling communication between the vehicle-mounted network 7 and the radar detector 20. The communication program is a program for realizing the communication control function described later.

Various data necessary for the operation of the power supply control device 30 are stored in the data storage unit 32b. The data storage unit 32b includes a power supply condition storage unit 32b1.

A plurality of power supply conditions and / or power blocking conditions are stored in the power supply condition storage unit 32b1. The plurality of power supply conditions include the first to eighth power supply conditions corresponding to the switching states 1 to 8, respectively. The plurality of power feeding conditions and the plurality of power blocking conditions may be different, but in the first embodiment, they are the same.

The first to eighth power supply conditions are information for determining that the vehicle is in the ignition on state for eight types of vehicles (hereinafter, may be referred to as "vehicle types A to H", etc.) from different manufacturers. Is. For example, in the vehicle model A, assuming that the vehicle-mounted network 7 outputs a response signal having the identification number "xx8" to the consultation signal having the identification information "xx0" when the ignition is on, the power supply condition memory is stored. The response signal identification number "xx8" is stored in the unit 32b1 as the first power supply condition. For example, in the vehicle type B, when the ignition is on, a response signal (for example, "xyz") having an identification number other than "xx8" is output from the vehicle-mounted network 7 to the consultation signal having the identification information "xx0". In this case, "xyz", which is the identification number of the response signal, is stored as the second power supply condition.

The power supply condition storage unit 32b1 can further store a plurality of power blocking conditions. In the first embodiment, since the first to eighth power feeding conditions are used as the first to eighth power blocking conditions, the power blocking conditions are not stored.

The noise detection unit 33 has an AC component passing circuit 41, a filter 42, an amplifier circuit 43, a rectifier circuit 44, and a DC conversion circuit 45, and detects noise from the power supply voltage. The noise is, for example, noise generated when the vehicle 1 is started and superimposed on the power supply voltage. In the case of the vehicle 1 having the engine 2, the noise generated at the start of the vehicle 1 and detected by the noise detection unit 33 is noise including a voltage drop generated at the start of the engine 2. If the vehicle 1 is not an engine 2 but a hybrid vehicle driven by a motor while running on a battery or an electric vehicle, the noise generated at the start of the vehicle 1 and detected by the noise detection unit 33 is the vehicle 1. It may be noise including a voltage drop generated when the power supply to the power supply is turned on.

The AC component passing circuit 41 is connected to the power supply terminal (Pin 16) of the OBD connector 6, removes the DC voltage component from the output voltage of the car battery 4 or the like, and passes only the AC component. The filter 42 is a filter that extracts only signals in the frequency band of interest to be detected from the AC component output from the AC component passing circuit 41. The AC component passing circuit 41 is used by selecting from a low-pass filter, a band-pass filter, and a high-pass filter according to a target frequency to be detected. For example, the alternator noise component that changes in proportion to the engine speed is, for example, approximately several tens of Hz to several hundreds of Hz, and is a noise component when the power of electrical components such as air conditioners, headlights, and clutter is turned on / off. Is a frequency band higher than the alternator noise. The width of the voltage drop when starting the engine is narrow, for example, on the order of μ seconds, and the frequency is high. Whether the vehicle 1 has the engine 2 or the electric vehicle, the noise including the voltage drop has a low frequency, so that it can be detected by one filter. Hereinafter, the voltage drop when the target frequency to be detected is when the engine is started (when the vehicle 1 is driven by a motor instead of the engine 2 (when the hybrid vehicle is running on a battery or an electric vehicle), the motor is started). The case of frequency will be described.

The signal of the frequency band to be detected output from the filter 42 is amplified by the amplifier circuit 43, rectified by the rectifier circuit 44, converted into a DC voltage by the DC conversion circuit 45, and output to the control unit 31 as a control signal. .. The noise detection unit 33 can accurately detect the start of the vehicle 1 having the engine 2 by using the filter 42 as a filter capable of detecting noise in a low band frequency including a voltage drop, and the noise detection unit 33 can accurately detect the start of the vehicle 1 of the electric vehicle. The start can also be detected accurately. If the output of the amplifier circuit 43 is also connected to the A / D port of the control unit 31 (for example, input to the CPU via a comparator instead of DC conversion), the threshold level (voltage) and detection frequency can be set arbitrarily. You will be able to do it.

The power switching unit 34 is composed of a relay switch that operates by a power control signal from the control unit 31. The power supply control signal is either an ON signal on the high level side or an OFF signal on the low level side of the specified threshold value. The power switching unit 34 is connected to the power terminal (Pin 16) of the OBD connector 6 and the radar detector 20, and supplies the power of the power terminal (Pin 16) to the radar detector 20 when the ON signal is received from the control unit 31. When an OFF signal is received from the control unit 31, the power supply from the power supply terminal (Pin 16) to the radar detector 20 is cut off.

The radar detector 20 has a control unit 23, a storage unit 24, and an interface unit 25. The control unit 23 is composed of a computer including a CPU, ROM, RAM, various peripheral circuits, and the like. The control unit 23 realizes various functions of the radar detector 20 by executing the OS recorded in the ROM and the program stored in the storage unit 24. Various functions of the radar detector 20 detect radar waves and display the results of the detection and various information received from the power supply control device 30 (for example, the engine speed of the vehicle 1, the vehicle speed, the water temperature, etc.). including. The storage unit 24 stores programs and data for realizing these various functions. The interface unit 25 includes an output device, an input device, and the like for inputting and outputting information. The output device includes an audio output device (speaker, etc.), an image output device (liquid crystal monitor, etc.), and the like for outputting each of the above information. Input devices include input operation devices such as touch panels for users to input and operate, reading devices for reading information stored in storage media such as SD cards, and communication devices for downloading information such as the Internet. including. The program of the storage unit 24 includes a display program for displaying various information (for example, engine speed, vehicle speed, water temperature, etc. of the vehicle 1) received from the power supply control device 30 on the image output device.

Hereinafter, the functions of the power supply control device 30 will be described.

The power supply control device 30 includes a power supply condition storage function, a noise detection function, a signal inspection function, a transmission / reception function, a power supply judgment function, an electric blocking judgment function, a power supply control function, a power supply condition setting function, and a connection determination. It has a function and a first and second special power supply function.

The power supply condition storage function is a function in which the power supply condition storage unit 32b1 stores the first to eighth power supply conditions.

The noise detection function is a function in which the control unit 31 detects noise in the power supply voltage based on the signal from the noise detection unit 33.

The signal inspection function is a function in which when the control unit 31 detects noise by the noise detection function, the control unit 31 inspects the presence or absence of a signal flowing on the vehicle-mounted network 7 via the signal terminal.

The transmission / reception function is a function in which the control unit 31 communicates with the in-vehicle network 7 and the radar detector 20 according to the communication program of the program storage unit 32a. The transmission / reception function includes a first consultation function, a second consultation function, and a communication function.

In the first consultation function, when the control unit 31 detects that a signal is flowing on the vehicle-mounted network 7 by the signal inspection function, the control unit 31 transmits a consultation signal to the vehicle-mounted network 7 via the signal terminal. It is a function to do. The consultation signal is a signal including an identification number (for example, "xx0") that identifies a specific in-vehicle computer 5 (for example, engine ECU) connected to the in-vehicle network 7.

In the second consultation function, the control unit 31 passes through the signal terminal from the time when the power supply determination function described later determines that the power supply condition is satisfied to the time when the electricity shield determination function described later determines that the power supply condition is satisfied. This is a function of repeatedly transmitting a consultation signal to the in-vehicle network 7 at regular time intervals (for example, 10 milliseconds to 1 second).

The communication function is a function in which the control unit 31 transmits and receives a signal between the vehicle-mounted network 7 and the radar detector 20 according to the communication program stored in the program storage unit 32a. By the communication function, the control unit 31 transmits, for example, an inquiry signal inquiring about the engine speed, vehicle speed, and water temperature to the vehicle-mounted network 7, and outputs a response signal indicating the engine speed, vehicle speed, and water temperature output from the vehicle-mounted network 7. Receive and transmit to radar detector 20. The signal is transmitted and received at regular time intervals (for example, 10 milliseconds to 1 second). The inquiry signal includes identification information (for example, "xx0") for designating a specific computer such as an engine ECU connected to the in-vehicle network 7, and the response signal includes the computer that transmitted the response signal. Identification information for identification (eg, "xx8") is included.

The power supply determination function is a function in which the control unit 31 determines the success or failure of the power supply condition using the first to eighth power supply conditions specified by the state of the DIP switch 54. Specifically, the control unit 31 inspects and detects a signal flowing through the vehicle-mounted network 7 via the signal terminal for a certain period of time (for example, about 0.5 seconds) after the consultation function transmits the consultation signal. When the generated signal satisfies the first to eighth power supply conditions specified by the state of the DIP switch 54, it is determined that the power supply condition is satisfied, and in other cases, it is determined that the power supply condition is not satisfied. For example, when the DIP switch 54 is in the first switching state, the first power supply condition is specified. Therefore, when a signal (response signal) including the identification information of "xx8" is detected within the above-mentioned fixed time, the control unit 31 determines that the power supply condition is satisfied, and in other cases, determines that the power supply condition is not satisfied.

The power blocking determination function is a function in which the control unit 31 determines the success or failure of the power blocking condition. Specifically, the control unit 31 inspects the signal flowing through the vehicle-mounted network 7 via the signal terminal for a certain period of time (for example, about 0.5 seconds) after the consultation signal is transmitted by the second consultation function. If the detected signal satisfies the first to eighth power supply conditions specified by the state of the DIP switch 54, it is determined that the power blocking condition is not satisfied, and in other cases, it is determined that the power blocking condition is satisfied. To do. For example, when the DIP switch 54 is in the first switching state, the first power supply condition is specified. Therefore, when a signal (response signal) including the identification information of "xx8" is detected within the above-mentioned fixed time, the control unit 31 determines that the power blocking condition is not satisfied, and in other cases, determines that the power blocking condition is satisfied.

In the power supply control function, when the control unit 31 determines that the power supply condition is satisfied, the control unit 31 transmits an ON signal to the power supply switching unit 34, and the power supply determination function satisfies the power supply condition. This is a function in which the control unit 31 controls the power supply to the radar detector 20 by transmitting an OFF signal to the power switching unit 34 when the control unit 31 determines. When the ON signal is transmitted to the power switching unit 34, the power switching unit 34 is turned ON, and power is supplied from the power terminal of the OBD connector 6 to the radar detector 20. When the OFF signal is transmitted to the power switching unit 34, the power switching unit 34 is turned off, and the power supply from the power terminal of the OBD connector 6 to the radar detector 20 is cut off.

4 and 5 show transmission / reception of a consultation signal and a response signal to the vehicle-mounted network 7 and power supply to the radar detector 20 in the conventional power supply control device (FIG. 4) and the power supply control device 30 (FIG. 5) of the first embodiment. The timing chart of is shown. “CANBUS” in the figure corresponds to the in-vehicle network 7. The power supply control device (FIG. 4) of the prior art is different from the power supply control device 30 in that the power supply control device (FIG. 4) does not have a signal inspection function and the first consultation function transmits a consultation signal when the noise inspection function detects noise of the power supply. To do.

As shown in FIG. 4A, in "1. Normal operation", the non-engine computer (indicated as "CAN" in the figure) wakes up by opening / closing the door and setting the ignition switch to the ACC position. It will be uploaded and some data will appear on the in-vehicle network. When the power control device (Fig. 4) detects these data, it sends a consultation signal (“ID: xx0”) to the engine ECU on the network (* 1), but when the ignition is off, the engine ECU is on the network. Since no response signal is returned to (* 2), power is not supplied to the radar detector 20. While the non-engine computer is wake up, some signal (other CAN data) output by the non-engine computer or the like continues to flow in the vehicle-mounted network 7.

When the ignition switch is in the IG position or the engine is started, the noise inspection function detects the power supply noise (* 3) generated by the ignition switch. As a result, the first consultation function transmits the consultation signal to the vehicle-mounted network 7 (* 4), and the engine computer outputs the response signal to the vehicle-mounted network 7. When the power supply determination function that receives this response signal (* 5) determines that the power supply condition is satisfied, the power supply control function starts power supply from the power supply terminal to the radar detector 20 (* 6). After that, the second consultation function repeatedly transmits the consultation signal (* 7), whereas the power supply determination function is a power blocking condition while the response signal is received from the in-vehicle network 7 (* 8). Since it is judged that the radar detector has not been established, the power supply to the radar detector 20 will continue, but when the ignition is off, the engine computer will not operate and the response signal to the consultation signal will not be output (* 9). The function determines that the power blocking condition is satisfied, and the power supply control function cuts off the power supply to the radar detector 20 (* 10).

On the other hand, in the case of "2. Noise detection during sleep (vehicle)", as shown in FIG. 4 (b), when the noise inspection function detects power supply noise (* 11) generated for some reason, The first consultation function sends a consultation signal to the in-vehicle network 7 (* 12), but since the engine computer is sleeping, no response signal is output to the in-vehicle network 7. Therefore, the power supply judgment function is a power supply condition. The establishment is not determined, and power is not supplied to the radar detector 20. However, the transmission of the consultation signal of * 12 causes the non-engine computer to wake up (* 13), and as a result, wasteful current is consumed. Since the wake-up state of the non-engine computer lasts for a certain period of time, the current consumption is not small. In addition, as shown in the figure, if the non-engine computer wakes up (* 13) many times due to the transmission of the consultation signal due to power supply noise, the current consumption increases, for example, the battery runs out during parking. It can happen that it goes up.

As shown in FIG. 5, in the power supply control device 30, when the noise inspection function detects power supply noise (* 21) generated for some reason, the signal inspection function inspects the signal flowing through the vehicle-mounted network 7 (* 22).

At this time, if the non-engine computer is in a wake-up state, as shown in FIGS. 5A and 5B, the signal inspection function detects the signal of the in-vehicle network 7, so that the first consultation function is performed. Sends a consultation signal to the in-vehicle network 7 (* 23).

Then, as shown in FIG. 5A, in the ignition on state, a response signal is output in response to the consultation signal of * 23 (* 24), so that the power supply determination function determines that the power supply condition is satisfied. The power supply control function starts power supply to the radar detector 20 (* 25). After that, the second consultation function repeatedly transmits the consultation signal (* 26), whereas the power supply determination function is a power blocking condition while the response signal is received from the vehicle-mounted network 7 (* 27). Since it is judged that the radar detector has not been established, the power supply to the radar detector 20 is continued, but when the ignition is turned off, the engine computer goes to sleep and the response signal to the consultation signal is not output (* 28), so the power blocking judgment is made. The function determines that the power blocking condition is satisfied, and the power supply control function cuts off the power supply to the radar detector 20 (* 29).

On the other hand, in the ignition off state, as shown in FIG. 5 (b), the response signal to the consultation signal of * 23 is not output (* 30), so that the power supply determination function cannot determine the establishment of the power supply condition. No power is supplied to the radar detector 20 by the power supply control function.

Further, even if the power supply noise (* 21) is detected by the noise inspection function, the signal inspection function does not detect the signal from the in-vehicle network 7 when the non-engine computer is sleeping, so FIG. 5 (c) ), The consultation signal is not transmitted by the first consultation function.

As shown in FIGS. 5 (a) and 5 (b), in the power supply control device 30, the consultation signal is transmitted by the first consultation function when the non-engine computer is in a wake-up state (*). 23) Since the non-engine computer has already been woken up, the problem of increased current usage does not occur. Then, as shown in FIG. 5C, the consultation signal is not transmitted while the non-engine computer is sleeping. Therefore, the non-engine computer wakes up (* 13) due to the transmission of the consultation signal (* 12) as shown in FIG. 4 (c), thereby avoiding the problem that the current consumption increases.

The power supply condition setting function is a function of setting the power supply condition based on the information from the radar detector 20, and the setting condition storage function stores the power supply condition set by the power supply condition setting function in the power supply condition storage unit 32b1. It is a function to do. The setting condition storage function executes the storage by rewriting any of the first to eighth power supply conditions to the power supply conditions based on the information from the radar detector 20. As a result, the user can use the power supply condition setting function to store the power supply condition for the user-owned vehicle even when the user-owned vehicle does not correspond to any of the switching states 1 to 8. By storing in 32b1 and switching the DIP switch 54 to the rewritten switching states 1 to 8, it becomes possible to control the power supply of the radar detector 20 by the power supply control function. Instead of switching the switching states 1 to 8, it may be stored in another switching state (for example, switching state 10) that can be selected by the DIP switch 54. In this way, the function of returning the switching states 1 to 8 to the original set value becomes unnecessary.

The user can set the power supply condition by the power supply condition setting function by inputting the power supply condition from the radar detector 20. As for the input of the power supply condition to the radar detector 20, for example, the power supply condition announced on the homepage of the manufacturer of the power supply control device 30 may be input by using the input operation device of the interface unit 25, or the power supply condition of the interface unit 25 may be input. It may be input by reading the power supply condition from a medium such as an SD card using a reading device. The control unit 31 receives the power supply condition input by the radar detector 20 via the connection units 22 and 53, and stores the received power supply information in the power supply condition storage unit 32b1 in the above mode.

Further, which of the first to eighth power supply conditions to be rewritten can be selected by operating the input operating device of the interface unit 25. The control unit 31 outputs a guidance screen or the like for making the selection from the output device of the radar detector 20, and based on the information input to the input operation device of the radar detector 20, the first to eighth power supply conditions. Decide which one to rewrite.

In the first special power supply function, when the DIP switch 54 is in the second switching state, the control unit 31 detects the success or failure of the power supply condition by the power supply determination function from the power supply terminal of the OBD connector 6 to the radar detector 20. It is a function to supply power to. Since the power supply control device 30 has the first special power supply function, the user simply connects the power supply control device 30 to the OBD connector 6 and the radar detector 20 and puts the DIP switch 54 in the second switching state. It becomes possible to receive power supply to 20. Therefore, the radar detector 20 is used even when the user does not know the setting of the appropriate DIP switch 54 for the user-owned vehicle or when the user-owned vehicle does not correspond to any of the switching states 1 to 8. It is possible. The user can also set the power supply condition by using the power supply condition setting function while the radar detector 20 is being supplied with power by the first special power supply function. As a result, it is possible to prevent the dilemma that the power supply condition cannot be set because the power supply condition is not stored or set, and the power supply condition cannot be set because the power supply condition is not supplied.

The connection judgment function controls the transition from the disconnected state where power cannot be supplied to the external device by the power supply control function to the connected state where power can be supplied to the external device by the power supply control function. 31 is a function to judge. Specifically, the disconnected state is a state in which the connecting portion 52 is not inserted into the OBD connector 6, and the connected state is a state in which the connecting portion 52 is inserted into the OBD connector 6. The control unit 31 determines, for example, the transition from the disconnected state to the connected state by detecting the voltage of the power supply terminal of the OBD connector 6.

In the second special power supply function, when the control unit 31 determines that the control unit 31 has changed from the disconnected state to the connected state by the connection determination function, the control unit 31 determines whether the power supply condition is successful or not by the power supply determination function, and the OBD connector. This is a function of supplying power to the radar detector 20 from the power supply terminal of 6. Since the power supply control device 30 has the second special power supply function, the user can receive power supply to the radar detector 20 by changing the power supply control device 30 from the disconnected state to the connected state. Therefore, the radar detector 20 is used even when the user does not know the setting of the appropriate DIP switch 54 for the user-owned vehicle or when the user-owned vehicle does not correspond to any of the switching states 1 to 8. Further, the user can also set the power supply condition by using the power supply condition setting function in the state where the power is supplied to the radar detector 20 by the second special power supply function. As a result, it is possible to prevent the dilemma that the power supply condition cannot be set because the power supply condition is not stored or set, and the power supply condition cannot be set because the power supply condition is not supplied.

The program update function is a function in which the control unit 31 updates the communication program of the program storage unit 32a and the display program of the storage unit 24 as a set based on the update information input to the radar detector 20. For example, the communication program before the update sends the above inquiry signal about the engine speed, vehicle speed, and water temperature to the vehicle-mounted network 7, and indicates the engine speed, vehicle speed, and water temperature output from the vehicle-mounted network 7. This is a program for realizing a communication function in which the control unit 31 receives the response signal and transmits it to the radar detector 20, and the display program determines the engine speed and the vehicle speed based on the response signal received from the power supply control device 30. When the program realizes a display function in which the control unit 23 displays the water temperature on the image display device of the radar detector 20, the control unit 31 is based on the update information input to the radar detector 20 by the program update function. Then, the control unit 31 transmits an inquiry signal about the engine speed, vehicle speed, water temperature and outside temperature to the vehicle-mounted network 7, and the engine speed, vehicle speed, water temperature and outside temperature output from the vehicle-mounted network 7 are transmitted to the communication program. The response signal indicating is updated to a program that realizes the function of the control unit 31 to receive and transmit it to the radar detector 20, and the display program is the engine rotation speed based on the above response signal received from the power supply control device 30. The program is updated to realize a function that the control unit 23 displays the vehicle speed, the water temperature, and the outside temperature on the image display device of the radar detector 20.

The update information is input to the radar detector 20 by reading the update information of the media such as the SD card using the reader or the like of the interface unit 25, or by reading the update information of the Internet into the communication device or the like of the interface unit 25. It is done by using and downloading.

Although the preferred embodiment has been described above, the shape, dimensions, material, operation mode, control mode, control parameter, operation mode, etc. of the device, system, program, function or its element, member, etc. in the above embodiment are examples. These are described as, and these can be modified as illustrated below.

<First modification>
For example, in the first embodiment, the case where the power supply determination function determines the establishment of the power supply condition when the response signal to the consultation signal transmitted by the first consultation function includes specific identification information has been described. May determine the success or failure of the feeding condition based on the number of identification information of the response signal and other parameters.

FIG. 6 shows identification information (a part of which is "ID example" in the figure) included in a signal flowing through the in-vehicle network 7 according to the state of the vehicle in a vehicle of a specific vehicle type (indicated as "vehicle B" in the figure). ) And the number of identification information (indicated as "ID number" in the figure). The vehicle B is a hybrid vehicle, and the hybrid vehicle has an IG on (on mode) in which electric power is supplied to the electrical components but cannot run, and a ready state in which the vehicle can run.

As shown in the figure, in the vehicle B, the signal having the identification information "BB2" is output only when the ignition switch is in the IG position and when the ignition switch is Ready. Therefore, the power supply determination function is the same as in the first embodiment. It is possible to determine the success or failure of the power supply condition based on the identification information (determine the establishment of the power supply condition when a signal having the identification information "BB2" is detected).

(First modification-1 Success / failure judgment of power supply condition based on the number of identification information)
However, even if such an appropriate signal (signal of identification information "BB2") is unknown, when the ignition switch is in the IG position and when it is Ready, it is compared with the case where it is in other states. When the number of identification information is clearly large and the number of identification information is a certain number or more (for example, 50 or more), it is possible to determine that the ignition switch is the IG position or Ready. Utilizing this, in the power supply control device 30 of the first modification mode-1, the power supply determination function determines that the power supply condition is satisfied when the number of identification information is a certain number or more, and the number of identification information is a certain number. If it is less than, it is judged that the power blocking condition is satisfied.

(1st modification-2 Judgment of success / failure of power supply condition by parameter of response signal)
Further, the signal having the identification information "AA1" is output not only when the ignition switch is in the IG position and Ready, but also during wake-up, ACC, and for a while after the ignition is turned off. However, since the D5 bit of the 5th Byte of the signal switches the state only when the ignition is on (“0” → “1”), the 5th Byte of the signal having the identification information “AA1” When the D5 bit is "1", the power supply determination function can determine that the power supply condition is satisfied. Utilizing this, in the power supply control device 30 of the first modified form-2, the power supply determination function satisfies the power supply condition when the D5 bit of the 5th byte of the signal having the identification information "AA1" is "1". Judgment is made, and it is judged that the power blocking condition is satisfied when the D5 bit is "0". In the first modification, the power supply determination function may determine the success or failure of the power supply condition and the power interruption condition based on other parameters of the response signal.

<Second modification>
In the first embodiment, the success / failure judgment of the power supply condition based on the number of identification information and / or the success / failure judgment of the power supply condition based on the parameter of the response signal may be selectively implemented. For example, one or more of the first to eighth power supply conditions is the information described in the first embodiment (information for determining the power supply condition based on the identification information), and the other one or more is the first. The information for determining the success or failure of the power supply condition based on the number of identification information described in the first modification mode-1, and one or more of the other information is the success or failure of the power supply condition based on the parameter of the response signal described in the first modification mode-2. It can be used as information for making a judgment. In this way, it becomes possible to more appropriately determine the vehicle condition (whether the ignition switch is in the IG position or Ready) according to the vehicle type, etc., and supply power, and it is possible to support a wider range of vehicle types. It will be possible.

<Third variant>
The power supply control device 30 of the third modification has, in addition to each function of the power supply control device 30 of the first embodiment, a constant inspection function, a vehicle state determination function, and a second power supply control function.

The constant inspection function is a function in which the control unit 31 constantly inspects the signal of the vehicle-mounted network 7.

The vehicle state determination function is a function in which the control unit 31 determines the state of the vehicle based on the signal detected by the constant inspection function. The specific mode of determination is the same as that of the first modified form, the first modified form-1, or the first modified form-2. For example, in a vehicle of a specific vehicle type, when the identification information included in the signal flowing through the in-vehicle network 7 and the number thereof are as shown in FIG. 6 according to the state of the vehicle, the constant inspection function is as follows (1) to (3). ), It is determined that the ignition switch is in the IG position or Ready.
(1) When a signal having the identification information "BB2" is detected (2) When the number of identification information is a certain number or more (for example, 50 or more) (3) The 5th Bit of the signal having the identification information "AA1" When the D5 bit of is "1"

The second power supply control function supplies power to the radar detector 20 from the power supply terminal of the OBD connector 6 when the constant inspection function determines that the ignition switch is in the IG position or Ready state, and other states. This is a function in which the control unit 31 controls to cut off the power supply from the power supply terminal of the OBD connector 6 to the radar detector 20 when it is determined to be.

The power supply condition storage function in the third modification is the state of the vehicle in the above-described aspects (1) to (3) for one or more types of vehicles as all or part of the first to eighth power supply conditions. One or more pieces of information for making a determination are stored in the power supply condition storage unit 32b1. Therefore, when the user sets the DIP switch 54 corresponding to the vehicle owned by the user, the power supply control device 30 of the third modified form can perform power supply control according to the state of the vehicle owned by the user. become.

In the third modified form, even a vehicle that responds to an external signal for a while after the ignition is turned off, such as an imported car or a recent vehicle, is supplied with power when the ignition is off. It is good because it can be blocked. In addition, in an idling stop vehicle, even if the idling stop is performed at an intersection or the like, power is supplied as long as the ignition switch is in the IG position or Ready state, so that there is a problem that the power of the external device is turned off each time the idling stop is performed. It is good because it can be solved.

<Third variant form-1>
In the third modified form, the noise detection function, the signal inspection function, the first and second consultation functions, the power supply judgment function, the power interruption judgment function, and the constant inspection function even if the power supply control function is omitted, The above power supply control can be performed by the vehicle state determination function and the second power supply control function. Utilizing this, the power supply control device 30 of the third modification mode-1 has a noise detection function, a signal inspection function, a first and second consultation function, a power supply judgment function, an electric shield judgment function, and a power supply control. Has no function. By doing so, it is possible to simplify / reduce the price of the function of the power supply control device 30.

<Fourth variant>
FIG. 7 shows the system configuration of the power supply control device 30 of the fourth modified form. As shown in the figure, the power supply control device 30 of the fourth modification has a first information storage unit 32b2 and a second information storage unit 32b3 in addition to the system configuration of the first embodiment.

The power supply control device 30 of the fourth modified form further has the first and second information storage functions and the second power supply condition setting function in addition to the functions of the power supply control device 30 of the third modified form-1.

The first information storage function controls the identification information included in all the signals flowing through the vehicle-mounted network when the vehicle is in the first state (for example, the ignition off state = the ignition switch is in the OFF position or the ACC position). Is a function of storing in the first information storage unit 32b2. The second information storage function controls the identification information included in all the signals flowing through the vehicle-mounted network when the vehicle is in the second state (for example, the ignition on state = the ignition switch is in the IG, Ready, etc. state). Is a function of storing in the second information storage unit 32b3.

The second power supply condition setting function is a function of setting the power supply condition based on the identification information stored in the first information storage unit 32b2 and the second information storage unit 32b3. Specifically, the identification information of the difference between all the identification information stored in the first information storage unit 32b2 and all the identification information stored in the second information storage unit 32b3 (that is, stored in the second information storage unit 32b3). The identified identification information (identification information that is not stored in the first information storage unit 32b2) is stored in the power supply condition storage unit 32b1 as a power supply condition.

More specifically, the first information storage function (1) instructs the user to put the vehicle in the first state, and then (2) confirms that the vehicle is in the first state. (3) When the operation is detected, the information about the signal flowing through the vehicle-mounted network is stored in the first information storage function. The second information storage function instructs the user to (4) put the vehicle in the second state (for example, the ignition on state), and then (5) puts the vehicle in the second state. The user is requested to perform the confirmation operation of (6), and information regarding the signal flowing through the vehicle-mounted network when the operation is detected is stored in the second information storage function. The display of these instructions and the acceptance of operations are performed through the input / output of information to the input / output device of the radar detector 20. This may simplify the power supply control device 3 and make it easier for the user to perform operations for information storage by the first and second information storage functions. For example, in (1) and (4), it is preferable to instruct the user to put the vehicle in the first and second states by the liquid crystal monitor, the speaker, or the like of the radar detector 20. In (2) and (5), if the power supply control device 30 automatically detects that the first and second states have been reached, the user's operation may be easier. The fact that the vehicle is in the first or second state may be determined by transmitting a consultation signal from the power supply control device 30 to the vehicle-mounted network 7 and detecting whether or not a response signal to the consultation signal can be detected. The order and contents of the above (1) to (6) can be changed as appropriate.

The vehicle state determination function of the power supply control device 30 of the fourth modified form is the state of the vehicle when a signal including identification information stored in the power supply condition storage unit 32b1 by the second power supply condition setting function is flowing to the vehicle-mounted network 7. Determines that "the ignition switch is in the IG position or Ready".

In the fourth modification, the case where the identification information is used as the information to be stored in the first and second information storage functions has been described, but instead of the identification information, other parameters (for example, the content of data and the number of identification information) have been described. ) May be used as a modified form.

<Fourth variant-1>
In the power supply control device 30 of the fourth modification, the second power supply condition setting function is a power supply condition storage unit that uses the identification information of the signal having the shortest cycle as the power supply condition when there are a plurality of difference identification information. Store in 32b1. For example, since the signal of the engine ECU has a short cycle, in the fourth modification mode-1, it may be possible to more reliably control the power supply to the external device when the engine ECU is waked up.
In the above-described embodiment, as described with reference to FIG. 7, the noise detection unit 33 is a DC conversion circuit via an AC component passing circuit 41, a filter 42, an amplifier circuit 43, a rectifier circuit 44, and a DC conversion circuit 45, respectively. Although it is configured to input from 45 to the control unit 31 to perform noise detection, for example, the DC conversion circuit 45 may be eliminated and the output of the rectifier circuit 44 may be input to the control unit 31. In this way, it is possible to distinguish between noise types such as noise when the cell motor is started, voltage effect noise due to the inrush current of the vehicle hazard blinking due to the door lock, and voltage drop noise due to the inrush current when the IG is on. Further, the output of the amplifier circuit 43 may be input to the control unit 31. In this way, the type of noise can be determined from the frequency superimposed on the power supply and the level of the power supply.
<Other modifications>
It is desirable that the in-vehicle network is CAN, but the vehicle manufacturer's proprietary network, LIN (Local Area Network), BEAN (Body Electronics Area Network), high-speed control system FlexRay, and information system MOST (Media Origin) ) Etc. may be used.

1 ... Vehicle 2 ... Engine 3 ... Alternator 3 ... Power control device 4 ... Car battery 5 ... In-vehicle computer 6 ... OBD connector 7 ... In-vehicle network 8 ... Tire 9 ... Tire 10 ... Rotation sensor 11 ... Rotation sensor 12 ... Engine sensor 13 ... Engine sensor 20 ... Radar detector 21 ... Cable 22 ... Connection 23.・ ・ Control unit 24 ・ ・ ・ Storage unit 25 ・ ・ ・ Interface unit 30 ・ ・ ・ Power supply control device 31 ・ ・ ・ Control unit 32 ・ ・ ・ Storage unit 32a ・ ・ ・ Program storage unit 32b ・ ・ ・ Data storage unit 32b1 ... Power supply female right storage unit 32b2 ... 1st information storage unit 32b3 ... 2nd information storage unit 33 ... Noise detection unit 34 ... Power supply switching unit 41 ... Component passage circuit 42 ...・ Filter 43 ・ ・ ・ Amplifier circuit 44 ・ ・ ・ Rectifier circuit 45 ・ ・ ・ Conversion circuit 51 ・ ・ ・ Housing 52 ・ ・ ・ Connection part 53 ・ ・ ・ Connection part 54 ・ ・ ・ Dip switch

Claims (6)

A power supply control device having a power supply control function that starts power supply to an external device based on the power supply supplied from the vehicle when a predetermined power supply condition is satisfied.
The power supply condition setting function for setting the power supply condition and
A first information storage function that stores information about signals flowing through the in-vehicle network when the vehicle is in the first state,
A second information storage function that stores information about a signal flowing through the vehicle-mounted network when the vehicle is in a second state different from the first state.
With more
The power supply condition setting function is a power supply control device characterized in that the power supply condition is set based on the information stored in the first information storage function and the information stored in the second information storage function. When there is a transition from a disconnected state in which power cannot be supplied to the external device by the power supply control function to a connected state in which power can be supplied to the external device by the power supply control function, the power supply control function The power supply control according to claim 1, further comprising a special power supply function for supplying power to the external device from the power supply supplied from the vehicle regardless of whether or not the power supply condition is satisfied. apparatus. The consultation signal is repeatedly transmitted to the in-vehicle network,
The power supply control function determines the success or failure of the power blocking condition based on the response signal flowing through the vehicle-mounted network after the transmission of any of the consultation signals.
The power supply according to claim 1 or 2, wherein the power supply control function cuts off power supply from the power supply supplied from the vehicle to the external device when it is determined that the power blocking condition is satisfied. Control device. A constant inspection function that constantly inspects the signals of the in-vehicle network and
Based on the signal detected by the constant inspection function, the vehicle condition determination function that determines the vehicle condition and the vehicle condition determination function
Any one of claims 1 to 3, which has a second power supply control function for controlling power supply from the power supply supplied from the vehicle to the external device based on the determination of the vehicle state determination function. The power control device described in. A communication program that controls the communication of information between the in-vehicle network and the external device,
Program update function and
Have,
The external device has an update information input function for receiving an input of update information from the outside, and a display program for displaying the information received from the power supply control device.
Any one of claims 1 to 4, wherein when the update information input function receives the input of the update information, the program update function updates the communication program and the display program as a set. The power control device described in. A program for realizing the function of the power supply control device according to any one of claims 1 to 5 in a computer.

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