JP7204242B2 - equipment and programs - Google Patents

Description

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

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

However, if power is supplied from the on-board power source to the external device regardless of the state of the vehicle, the battery may run out due to, for example, long-term parking. For this reason, power supply control devices have been proposed that control power supply to external devices according to the state of the vehicle (for example, Patent Documents 1 and 2).

Patent Literature 1 discloses a power supply control device that supplies power to an external device when noise is detected on the power supply voltage due to an alternator or the like. Patent document 2 transmits a response request signal to an in-vehicle network when noise in the power supply voltage is detected, and when a response output signal (for example, a response output signal from an engine ECU) is received in response thereto, an external Disclosed is a power control device that supplies power to equipment. 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 cutting off the power supply when the response output signal cannot be received from the in-vehicle network. In Patent Document 2, instead of noise in the power supply voltage, it is conceivable to use wake-up of CAN as a trigger to transmit a response request signal.

Japanese Patent Application Laid-Open No. 11-222084 JP 2012-148717 A

The inventor of the present invention believes that even when the key is not inserted (for example, a gasoline car is parked with the engine turned off and there is no occupant present), noise may occur in the power supply voltage for some reason. , has an effect on the current consumption of the vehicle. For example, recent vehicles and car accessories include, for example, gasoline vehicles that are parked with the engine turned off and that operate even when there are no occupants (for example, electrical equipment related to security). power supply voltage noise may occur when the In the power supply control device of Cited Document 2, when these noises are detected, a response request signal is transmitted to the in-vehicle network. wakes up, increasing the current flowing to devices connected to the in-vehicle network. If such noise occurs frequently, it is conceivable that, for example, a gasoline-powered vehicle parked with the engine turned off may run out of battery even when no occupant is present.

Also, 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 based on the response signal from the engine ECU. However, some vehicles, such as imported cars and recent vehicles, send a response signal in response to an external signal for a while after the ignition is turned off. The inventors have found that there is a problem that cannot be determined accurately.

Direct monitoring of the ignition switch by an external input line is conceivable, but it is difficult for a general user without specialized knowledge to perform such wiring.

The present application discloses an invention that addresses all or part of the above problems or other problems.

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

<Configuration example 1>
Detecting noise in the power supply supplied from the vehicle, and when detecting a signal flowing through the in-vehicle network, transmitting an inquiry signal to the in-vehicle network,
characterized by having a power supply control function of starting power supply to an external device based on power supplied from the vehicle when a predetermined power supply condition is satisfied based on a response signal flowing through the in-vehicle network after transmission of the inquiry signal; power control equipment.

In this way, noise in the on-board power supply is detected, and when a signal on the in-vehicle network is detected, a sounding signal is sent to the on-board network. Compared to the case of transmission, the percussion signal does not wake up the computer on the in-vehicle network, 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, for example, the ignition switch is in the OFF position when the vehicle is asleep, such as when a gasoline car is parked with the engine off and no occupants are present. , the occurrence of so-called dead battery can be prevented. This is particularly effective in vehicles having an in-vehicle computer that wakes up when a percussion signal flows through the in-vehicle network. This is particularly effective in vehicles in which a plurality of in-vehicle computers wake up when a percussion signal flows through the in-vehicle network.
In particular, the percussion signal is preferably transmitted when the signal of the vehicle network is detected after the noise of the vehicle power supply is detected. The percussion signal may be transmitted, for example, when all or part of the computer connected to the in-vehicle network (for example, the body system ECU) detects a signal flowing in a state in which it has already woken up. Therefore, it is possible to more accurately avoid a situation in which a computer or the like in a sleep state is woken up by a percussion signal. The sounding 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 when all or part of the computer connected to the in-vehicle network wakes up. When there is only a signal that does not indicate that the sound is being transmitted, it is better not to transmit it. By doing so, it is possible to more accurately avoid the situation in which a sleeping computer or the like is woken up by the percussion signal. It is good because it can be done.

In configuration example 1, in addition to detecting noise in the on-board power source and signals flowing through the on-board network, when it is determined that the power supply conditions have been met based on the response signal that flows through the on-board network after the sounding signal is sent, the external device Therefore, 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 appropriate external devices according to the state of the vehicle. It is good because it becomes controllable.

The power supplied from the vehicle may be, for example, a power supply connected directly or indirectly to the vehicle's battery or alternator. Power supply noise includes, for example, alternator noise caused by power generation associated with engine rotation, spike noise such as ignition noise that occurs when a plug is ignited, and when the ignition switch is set to the IG or ACC position when the cell is started. Voltage drop noise or the like due to inrush current to various devices in the vehicle that occurs when the door is unlocked or when the door is unlocked may be used. The in-vehicle network may be, for example, CAN, FlexRay, or the like. Signals flowing through the in-vehicle network may be obtained from a connector for detachably connecting a power control device or other device. The connector may be a connector having signal terminals and power terminals. 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 on-vehicle power supply and the signal of the on-vehicle 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, for example, about 1 sec) from the detection of noise in the power supplied from the vehicle, the power supply control device should shift to sleep. By doing so, it is possible to reduce the current consumed by the device. It is preferable to inspect the signal of the in-vehicle network only for a certain period of time from the detection of noise in the power supply supplied from the vehicle, and stop the inspection after the certain period of time has elapsed. For this fixed period of time, even though data continues to flow on the in-vehicle network after the sounding signal is sent, if there is no response, it is recommended to retry a few times, and re-sound 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 sounded after noise is detected at the ACC position. The ignition is still on (for example, the ignition switch is IG position), even if the ignition switch is turned to the OFF position after that, the vehicle will not go to sleep because there is a sound.If you re-sound after noise detection, the ignition switch is in the ACC position. (When the ignition switch changes from the ACC position to the OFF position, the vehicle can go to sleep). It is more preferable that the power supply determination function inspects the signal of the in-vehicle network only for a certain period of time after the percussion signal is transmitted, and does not inspect the signal after the certain period of time has elapsed.

The power feeding condition may be, for example, conditions related to information contained 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 determined by the response signal or the signal flowing on the vehicle network (for example, if the external device is a radar detector, the signal flowing on the vehicle network when the ignition switch is in the IG position, If so, the power supply condition should be the detection of a signal flowing on the in-vehicle network when the ignition switch is in the ACC position, or the detection of the door lock signal from the remote controller if the external device is a security-related device). The power supply control function preferably performs control to start power supply from the onboard power supply to the external device when it is determined that the power supply condition is satisfied. The power supply control function is activated, for example, when the ignition switch of the vehicle is in the IG position, or when there is a response signal indicating that the vehicle is running (for example, when the engine speed is not 0 rpm), or when such a response signal When it is estimated that there is a The power supply should be turned off when it is detected that the engine speed has reached 0 rpm (the engine has stopped). However, in the case of idling stop vehicles, there is a problem that the power of external equipment is turned off every time it stops (idling stop) at an intersection, etc. Therefore, it is necessary to set or judge whether it is an idling stop vehicle In this case, it is preferable not to determine that the power supply condition is established when the engine speed is 0 rpm. The external device should be a device that is not intended for use outside of the above conditions. For example, radar detectors are not intended to be used outside of these conditions, so if the external device is a radar detector, powering it only in the above conditions effectively reduces the current used. It is good because it can be done. The power supply control function is, 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 estimated that the power supply condition has been met. The external device should be a device that is intended to be used in these states.For example, the navigation system may be used even in the ACC state, so the external device is a 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 preferably has a connector or cable that can be detachably connected to the external device. The power control device preferably has hardware and software such as a switching device for switching between supply/cutoff of power to the external device. The power control device may be a power adapter. The power control device preferably has a storage medium storing data such as power supply conditions and programs for realizing each function of the power control device. The storage medium may be a volatile or non-volatile storage medium. A volatile medium may be, for example, RAM. The non-volatile medium may be, for example, an EEPROM. The power control device preferably has a control unit such as a CPU for executing the program and/or realizing each function of the power control device.

<Configuration example 2>
The power supply control device, wherein the power supply determination function determines whether or not the power supply condition is satisfied based on parameters of the response signal.

By doing so, it is possible to easily and accurately determine whether the power supply condition is satisfied. For example, the power supply determination function may determine that the power supply condition is met when a response signal containing a specific parameter is detected. For example, if it is known that when the vehicle is in a specific state (for example, the ignition is on), a response signal containing a specific parameter to the percussion signal flows through the in-vehicle network, the specific parameter is detected. By determining that the power supply condition is established when the vehicle is in the specific state, 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 data contained in the signal. For example, in 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 specific bit (for example, the 5th bit of the 5th byte of the data portion of the packet) will transmit a response signal of "1". In this case, if it is determined that the power supply condition is satisfied when the specific bit detects a 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, when the response signal is detected in a short cycle that can be obtained when the engine is running, or when the response signal detection frequency is as high as when the engine is running, it may be determined that the power supply condition is met. . For example, in the case of a vehicle in which the signal from the engine ECU has a shorter period than other signals, the period or frequency when the engine ECU is awake may be used. By doing so, it is possible to control the power supply to the external device while the engine ECU is awake.

<Configuration example 3>
The power supply control device, wherein 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 whether or not the power supply conditions are satisfied. For example, whether or not a signal including specific identification information is flowing in the in-vehicle network may be used to determine whether or not the power supply condition is satisfied. For example, when a signal including specific identification information is flowing in the in-vehicle network, it is preferable to determine the direction in which the power feeding condition is satisfied. Regarding the judgment in the direction in which the power supply condition is satisfied, it may be determined that the power supply condition is satisfied when the condition of configuration example 3 is satisfied, and when another condition (for example, the condition of configuration example 2) is satisfied at the same time. It may be determined that the power supply condition is established at . The identification information may be, for example, information for identifying the computer that has sent 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 met when the signal containing the identification information is detected. By determining that the vehicle is in the specific state, power can be supplied to the external device. Alternatively, for example, if it is known that a signal having the second identification information flows to the in-vehicle network in response to the sounding signal of the first identification information in a specific state of the vehicle in a specific vehicle type, By determining that the power supply condition is established when the signal including the second identification information is detected, power can be supplied 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 or the type of vehicle, a response signal with an identification number obtained by adding "8" to the identification number of the sounding signal may be output. For such manufacturers and vehicles, the second identification information may be obtained by adding "8" to the first identification information. For example, when the second identification information having this certain relationship is detected, it may be determined that the power feeding condition is met. If this fixed irrelevant second identification information is detected, it should not be determined that the power supply condition is satisfied.

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

By doing so, it is possible to make it easier and more accurate to judge whether the power supply condition is met. For example, when the number of types of identification information included in the response signal flowing through the in-vehicle network is equal to or greater than a certain number, it is preferable to determine the direction in which the power supply condition is satisfied. Regarding the judgment in the direction in which the power supply condition is satisfied, it may be determined that the power supply condition is satisfied when the condition of configuration example 4 is satisfied, and other conditions (for example, the conditions of configuration examples 2 and 3) are satisfied at the same time. It may be determined that the power feeding condition is established when the For example, in a specific vehicle type, if it is known that the number of identification information or the number of types of identification information in a specific state of the vehicle is greater than or equal to a certain number, the power feeding condition is established when the number is greater than or equal to the certain number. By determining that the vehicle is in the specific state, power can be supplied to the external device.

<Configuration example 5>
a power supply condition setting function for setting the power supply condition;
a setting condition storage function for storing the power supply condition set by the power supply condition setting function;
The power supply control device, wherein 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 conditions. For example, even if the specification of the in-vehicle network (for example, the specification of what kind of signal flows to the in-vehicle network according to the state of the vehicle etc.) changes due to a new release or model change, the condition setting function can be used to It is possible to set power supply conditions for new vehicle models, etc., so it is possible to flexibly respond to vehicles of various vehicle models and manufacturers.

<Configuration example 6>
The power supply control device, wherein the power supply condition setting function sets the power supply condition based on a user's operation.

In this way, the user can arbitrarily set the power supply conditions. For example, when the user wants to use the power supply control device for a new vehicle model, the user obtains the power supply conditions for the new vehicle model, for example, from the manufacturer of the power supply control device, and sets the power supply conditions using the power supply condition setting function. It is good because it can be set. The method of acquisition may be, for example, download from a website, distribution of media such as an SD card, or the like.

<Configuration example 7>
The power supply control device, wherein the power supply condition setting function sets the power supply condition based on an operation performed by a user on the external device.

In this way, the power supply conditions can be set by operating the external device, so the user's convenience and operability can be improved, 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 preferably has a user interface for operation, such as an output device such as a liquid crystal monitor or an input device such as a touch panel. The power supply condition setting function preferably causes the output device of the external device to display a screen for receiving an input for setting the power supply condition. The power terminal is often located in a position that is difficult for the user to operate, while the external device is often located in a position that is easy for the user to operate. In 7, the user does not have to perform operations at positions that are difficult to operate.

<Configuration example 8>
a first information storage function that stores information about signals flowing through the in-vehicle network when the vehicle is in a first state;
a second information storage function for storing information about signals flowing through the in-vehicle network when the vehicle is in a second state different from the first state;
further having
The power supply control device, wherein the power supply condition setting function sets the power supply condition based on the information stored by the first information storage function and the information stored by the second information storage function.

By doing so, it is possible to automatically set the power supply condition based on the information stored by the first information storage function and the information stored by the second information storage function. For example, the first state may be the ignition ON state (eg, 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 ACC position).

The first information storage function preferably stores information about all signals flowing through the in-vehicle network in the first state. The second information storage function preferably stores information about all signals flowing through the in-vehicle network when in the second state. In particular, the storage time in the first state and the second state should be the same. 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 can be easily determined. In particular, if the power supply condition is determined using the identification information of the difference between the information in the first information storage function and the information in the second information storage function, the power supply condition can be determined particularly easily. Specifically, for example, the identification information remaining when the identification information of all the signals flowing in the first state is removed from the identification information of all the signals flowing in the second state should be used. 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 may be a plurality of "remaining identification information". If the signal has a shorter cycle than other signals, it is possible to more reliably control the power supply to the external device when the engine ECU is awake. Here, the case where the identification information is used as the information stored in the first and second information storage functions has been described, but other parameters (for example, data content) may be used instead of the identification information. For details of parameters and data, refer to the above description.

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 has been put in the first state. (3) storing, in a first information storage function, information about the signal flowing through the in-vehicle network when the operation is detected; and (4) providing the vehicle to the user as a second state (for example, ignition on state), then (5) asks the user to confirm that the vehicle is in the second state, and (6) detects the operation. It is preferable that the learning is performed by a method of storing information about signals flowing through the in-vehicle network in the second information storage function. The display of these instructions and the acceptance of operations can be performed by using an external device because the power control device can be simplified. For example, in (1), the user is instructed to connect the power control unit 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 it has become, the user's operation will be easier. It is preferable to determine that the second state has been reached by transmitting a sounding signal from the power control unit to the in-vehicle network and receiving a response signal therefrom. In addition, the above procedure can be changed as appropriate.

<Configuration example 9>
a power supply condition storage function for storing a plurality of the power supply conditions;
further comprising a power supply condition selection function for selecting one of the power supply conditions stored by the power supply condition storage function;
The power supply control device, wherein 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. The power supply can be controlled more flexibly according to a plurality of types of vehicles with different specifications (specifications of whether such signals flow to the in-vehicle network). For example, if the conditions for determining the state of a vehicle are determined by the model or manufacturer, the conditions for each model or manufacturer are stored as power supply conditions so that the power supply conditions can be selected according to the model or manufacturer. , it is possible to supply power to an external device according to the state of the vehicle for vehicles of a plurality of types and manufacturers. The power supply condition selection function may allow selection of a plurality of power supply conditions. In that case, for example, power feeding may be started when any one of the selected power feeding conditions is satisfied, or power feeding may be started when all or two or more of the selected power feeding conditions are satisfied. .

<Configuration example 10>
a switch capable of selecting one of one or more first switching states corresponding to one or more of the power supply conditions and one or more second switching states;
further has a first special power supply function,
When the switch selects one of the first switching states and the power supply determination function determines that the power supply condition corresponding to the selected first switching state is satisfied, the power supply control function supplies power to the external device,
When the switch selects one of the second switching states, the first special power supply function is configured to switch the power supply from the onboard power supply to the external device 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.

In this way, by setting the switch to the second switching state, the user can secure power supply to the external device regardless of whether the power supply determination function determines success or failure. 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 new vehicle model), the user can switch the switch to the second switching state so that the external This is good because it is possible to ensure the power supply to the device. Therefore, it is possible to prevent the dilemma that power cannot be supplied because power supply conditions are not stored or set, and power supply conditions cannot be set because power is not supplied. The switch may be, for example, a DIP switch.

<Configuration example 11>
When there is a transition from a disconnected state in which the power supply control function cannot supply power to the external device to a connected state in which the power supply control function can supply power to the external device, the power supply determination function performs the power supply determination function. A power supply control device, further comprising a second special power supply function of supplying power from the vehicle-mounted power supply to the external device regardless of whether or not a power supply condition is satisfied.

In this way, it is possible to ensure the power supply to the external device when the disconnection state transitions to the connection state, regardless of the success/failure determination 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 new vehicle model or a vehicle of a new manufacturer), the power supply control device is switched from the disconnected state to the connected state. By doing so, the power supply to the external device can be ensured. Therefore, it is possible to prevent the dilemma that power cannot be supplied because power supply conditions are not set and power supply conditions cannot be set because power is not supplied. The disconnected state may be a state in which the power control device is disconnected from the in-vehicle network, and the connected state may be a state in which the power control device is connected to the in-vehicle network. The transition from the disconnected state to the connected state may be performed, for example, by inserting the connector of the power supply control device into the connector of the in-vehicle network. In this case, in order to suppress the current consumption due to the continuation of the connected state, it is preferable to switch to the disconnected state automatically by a timer of about several minutes. Also, it is preferable to enable or disable the timer setting by using a DIP switch or the like. The disconnection state may be a state in which the battery is exhausted, and the connection state may be a state in which the battery is not exhausted.

In configuration examples 10 and/or 11 (in particular, configuration examples 10 and/or 11 citing any of configuration examples 5 to 9), the power supply from the on-vehicle power supply to the external device is performed regardless of the success/failure determination by the power supply determination function. If the power supply condition setting function accepts the setting operation while the power supply condition is being set, the setting will be performed when the probability that the power supply condition needs to be set is high, and the user's convenience will be improved. .

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

In this way, for example, a computer on the in-vehicle network can be specified by the identification information of the sounding signal, and the success or failure of the power supply conditions can be determined based on the response signal issued by the specified computer. If the inquiry signal includes an identification number for identifying the computer on the vehicle network operating to supply power to the external device, it is possible to accurately determine when power should be supplied to the external device. For example, using a percussion signal having identification information specifying the engine ECU, if it is determined that the power supply condition has been met when there is a response signal from the engine ECU, the power supply to the external device while the engine ECU is awake It is good because it is possible to control the power supply of

<Configuration example 13>
the percussion function repeatedly transmits the percussion signal to the in-vehicle network;
The power supply determination function determines success or failure of a power interruption condition based on the response signal flowing through the in-vehicle network after transmission of any of the sounding signals,
The power supply control device, wherein the power supply control function cuts off power supply from the in-vehicle power supply to the external device when the power interruption determination function determines that the power interruption condition is satisfied.

In this way, it is possible to cut off (for example, terminate) power supply from the vehicle-mounted power source to the external device based on the response signal. For example, if the response signal cannot be detected, power supply may be cut off. For example, the sounding function may repeatedly transmit the sounding signal when detecting a response signal flowing through the in-vehicle network after the sounding signal is transmitted. For example, the sounding function may repeatedly transmit the sounding signal when detecting a response signal flowing through the in-vehicle network within a certain period of time after the sounding signal is transmitted. The repetition interval of the percussion signal is preferably set to a constant time. In order to appropriately monitor the state of the vehicle and appropriately control the power supply, it is preferable that the certain period of time is about 10 milliseconds to 1 second. Each percussion signal may be a signal having the same configuration (for example, the same waveform, frequency, amplitude, parameters, etc.).

It is preferable that the power interruption condition is different from the power supply condition. The power supply determination function may, for example, determine that the power interruption condition is satisfied when a signal of a specific parameter or identification number cannot be detected. The power supply determination function may, for example, determine that the power interruption condition is satisfied when a signal of a specific parameter or identification number cannot be detected for a certain period of time or longer. A more specific mode of judging the success or failure of the power supply condition may be the same or similar to the above-described mode of judging the success or failure of the power supply condition.

<Configuration example 14>
A constant inspection function that constantly inspects the signal of the in-vehicle network,
a vehicle state determination function that determines the state of the vehicle based on the signal detected by the constant inspection function;
A power supply control device comprising a second power supply control function of controlling power supply from the onboard power supply to an external device based on the determination of the vehicle state determination function.

In this way, the power supply to the external device can be controlled in accordance with the state of the vehicle determined based on the signal of the in-vehicle network. The vehicle state determination function may, for example, determine the state of the vehicle based on the parameters of the in-vehicle network signal (eg, data content, identification information, number of identification information, etc.). For example, if it is known that a signal containing a parameter specific to the vehicle flows through the in-vehicle network only when the vehicle is in a specific state (for example, the ignition is on), when the signal containing the parameter is detected, the second It is preferable that the second power supply control function supplies power to the external device, so that power can be supplied 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 in a vehicle such as an imported vehicle or a recent vehicle that responds to a signal from the outside for a while after the ignition is turned off, the power supply can be supplied when the ignition is turned off. It is good because it can be blocked. In addition, in the idling stop vehicle, even if idling is stopped at an intersection or the like, power is supplied as long as the ignition is on. As a constant test, it is preferable to constantly test the signal of the in-vehicle network. For example, it may be desirable to examine the signal of an in-vehicle network regardless of whether noise is detected in the on-board power supply.

The invention of Structural Example 14 may be a structural example citing any of Structural Examples 1 to 13, or may be an independent structural example quoting none of Structural Examples 1 to 13. Configuration example 14, which does not refer to configuration example 1, does not require transmission of the percussion signal, and can reliably prevent the problem of increased current consumption due to wake-up of the computer by the percussion signal.

<Configuration example 15>
The power control device
a communication program for controlling communication of information between the in-vehicle network and the external device;
program update function,
has
The external device has an update information input function for receiving input of update information from the outside and a display program for displaying the information received from the power control device,
A power supply control device, 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.

In this way, the acquisition of information from the in-vehicle network and the program for displaying the information can be updated as a set. For example, when the power control unit 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 air temperature By using the update information for displaying additional information, the power control unit acquires information on the engine speed, vehicle speed, water temperature, and outside temperature from the in-vehicle network and provides it to the external device. It is preferable that the communication program and the display program can be updated as a set so as to display information on the number of revolutions, vehicle speed, water temperature, and outside air temperature.

The update information may be commands, programs and/or data for updating the communication program and the display program. The update information may be provided, for example, by downloading it 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, the update information may be input by attaching a medium such as an SD card storing the update information to the external device.

In configuration example 15, the power supply control device has the program update function, but the program update function may be provided by an external device, or may be provided by another device/device. For example, as a configuration example of a modification of configuration example 15, configuration example 15' below may be used.
<Configuration example 15'>
a power supply control device according to any one of configuration examples 1 to 14, having a communication program for controlling communication of information between the in-vehicle network and the external device;
an external device having an update information input function for receiving input of update information from the outside and a display program for displaying the information received from the power control device;
has a program update function and
A system according to claim 1, wherein said program update function updates said communication program and said display program as a set when said update information input function receives input of said update information.

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

The configurations described in the respective configuration examples and the like described above may be combined to the extent that there is no contradiction. Further, it is preferable to construct a new configuration example by arbitrarily combining the constituent elements described in each configuration example etc. within a range that does not cause contradiction.

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

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

In this embodiment, the vehicle's ignition switch can be switched to any one of four positions: OFF position, ACC position, IG position, and electric start position. When the ignition switch is in the OFF or 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 in the self start position, the vehicle is in the "ignition on" state (in which the engine can be started).

An engine sensor 12 and an 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.). A tire 8 is a front tire, and a rotation sensor 10 is a sensor for detecting rotation of the tire 8 . A tire 9 is a rear tire, and a rotation sensor 11 is a sensor for detecting rotation of the tire 9 .

A plurality of in-vehicle computers 5 are connected to the in-vehicle network 7 . For example, the vehicle-mounted computer 5 to which the rotation sensor 10, the rotation sensor 11 and various sensors (not shown) are connected, and the vehicle-mounted computer 5 to which the engine sensor 12, the engine sensor 13 and various sensors (not shown) are connected are also connected. there is The plurality of in-vehicle computers 5 include a plurality of computers such as an engine ECU that is activated only when the ignition is on (hereinafter sometimes referred to as an "engine system computer"), and a computer that operates when the ignition switch is in the ACC position or when the door is on. Includes multiple computers (hereinafter sometimes referred to as “non-engine computers”) that start up when the engine is opened or closed. The rotation sensor 10, the rotation sensor 11, the engine sensor 12, the engine sensor 13, etc. and the in-vehicle computer 5 are energized and start operating when the ignition key of the vehicle 1 is in the ACC position or the IG position. 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 on-board computer 5 are sent to the in-vehicle network 7 . 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 battery running and idling stop.

The in-vehicle network 7 is CAN.

The radar detector 20 detects radar waves emitted by the speed control device, receives as much radio waves as possible if the radar detector has a radio reception function, and if the radar detector has a GPS reception function, It is a device that notifies the driver of information such as fixed type enforcement devices in the vicinity that have already been registered to the device and the enforcement area that has been enforced in the past, and encourages the driver to drive safely.

FIG. 2 shows the OBD connector 6 and the power control device 30 . The OBD connector 6 has the same shape and pin arrangement called DTC (SAE J1962 standard) beyond the framework of communication standards. FIG. 2(b) shows the pin arrangement of the OBD connector 6. As shown in FIG. The OBD connector 6 has a type A and a type B. The type A is installed within a range of one foot (approximately 30 cm) from the instrument panel of the vehicle (near the steering column) within a range accessible from the driver's seat. Type B is installed within 2.5 feet (approximately 75 cm) of the instrument panel of the vehicle (such as near the center console) within a range that can be accessed from the driver's or front passenger's 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 Pin7 of the OBD connector 6, it can be determined that it is connected to the K-Line. If there are terminal pins of Pins 6 and 14 of the OBD connector 6, it can be determined that it is connected to CAN. Pin 16 is a power supply terminal and is connected to the alternator 3 and/or the car battery 4, which are on-vehicle power supplies. Terminals other than Pin 16 of the OBD connector 6 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 suitable strength, such as plastic. The housing 51 has connection portions 52 and 53 and DIP switches 54 on its front and rear side surfaces and back surface, respectively.

The connection portion 52 has a shape and structure that allows the OBD connector 6 to be detachably attached. The connecting portion 52 has terminals corresponding to each Pin of the OBD connector 6 .

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

FIG. 2(c) shows the DIP switches 54 on the back of the power control device 30. FIG. The DIP switch 54 has four setting switches (numbers 1 to 4) for setting the operation of the control section 31 . The DIP switch 54 can take 16 different switching states by ON/OFF of each switch. The switching states 1 to 8 corresponding to the values 0 to 7 taken by the DIP switches numbered 1 to 3 are called the first switching state, and the ON/OFF state of the DIP switch numbered 4 is called the second switching state. The user can select one of the switching states 1 to 8 according to the 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 control device 30. As shown in FIG. The power control device 30 has a control section 31 , a storage section 32 , a noise detection section 33 and a power switching section 34 .

The control unit 31 is configured by a computer including a CPU, ROM, RAM, various peripheral circuits, interfaces, and the like. The control unit 31 develops the OS recorded in the ROM and the program stored in the program storage unit 32a on the RAM and executes them, thereby executing various processes described later and realizing 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 can control transmission and reception of signals between the in-vehicle network 7 and the radar detector 20 . The control unit 31 is further connected to the noise detection unit 33 and the power switching unit 34 , and based on the signal from the noise detection unit 33 , transmits an ON signal/OFF signal (to be described later) to the power switching unit 34 .

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

Various programs necessary for realizing various functions (described later) of the power control device 30 are stored in the program storage unit 32a. The programs in the program storage unit 32 a include a communication program for controlling communication between the vehicle-mounted network 7 and the radar detector 20 . A communication program is a program for realizing a communication control function, which will be described later.

Various data necessary for the operation of the power 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 cut conditions are stored in the power supply condition storage unit 32b1. The plurality of power supply conditions includes first to eighth power supply conditions corresponding to switching states 1 to 8, respectively. The plurality of power supply conditions and the plurality of power interruption conditions may be different, but are the same in the first embodiment.

The first to eighth power supply conditions are information for determining whether the vehicle is in the ignition-on state for eight types of vehicle types (hereinafter sometimes referred to as "models A to H", etc.) made by different manufacturers. is. For example, in vehicle type A, when the ignition is on, a response signal having identification number "xx8" is output from vehicle-mounted network 7 in response to a sounding signal having identification information "xx0". The identification number “xx8” of the response signal is stored in the section 32b1 as the first power supply condition. For example, in 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 in-vehicle network 7 in response to a sounding signal having 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 interruption conditions. In the first embodiment, since the first to eighth power supply conditions are used as the first to eighth power supply conditions, the power supply conditions are not stored.

The noise detection section 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 when the vehicle 1 is started and detected by the noise detection unit 33 is noise including a voltage drop generated when the engine 2 is started. If the vehicle 1 is a hybrid vehicle that is driven by a motor instead of the engine 2 and is running on a battery or an electric vehicle, the noise generated when the vehicle 1 is started and detected by the noise detection unit 33 is The noise including the voltage drop that occurs when the power supply to the is turned on.

The AC component passing circuit 41 is connected to the power 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 the signal in the frequency band to be further detected from the AC component output from the AC component passing circuit 41 . The AC component pass circuit 41 is used by selecting from a low-pass filter, a band-pass filter, and a high-pass filter according to the 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 to several hundreds of Hz. is a frequency band higher than the alternator noise. The width of the voltage drop at engine start-up is narrow, for example, on the order of microseconds, and the frequency is high. In both the case where the vehicle 1 has the engine 2 and the case of the electric vehicle, the noise including the voltage drop is in the low frequency band, so it can be detected with one filter. Below, the target frequency to be detected is the voltage drop when the engine is started (when the vehicle 1 is driven by a motor instead of the engine 2 (during battery driving of a hybrid vehicle or an electric vehicle), when the motor is started). A case of frequency will be described.

A signal in 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 to a DC voltage by the DC converter circuit 45, and output as a control signal to the controller 31. . The noise detection unit 33 uses a filter that can detect noise in a low frequency band including a voltage drop as the filter 42, so that the start of the vehicle 1 having the engine 2 can be accurately detected, and the electric vehicle 1 can be detected. Starting can also be accurately detected. 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 arbitrarily set. It will be possible.

The power switching unit 34 is composed of a relay switch operated by a power control signal from the control unit 31 . The power control signal is either an ON signal on the high level side or an OFF signal on the low level side of a prescribed 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 an ON signal is received from the control unit 31. , cuts off the power supply from the power terminal (Pin 16) to the radar detector 20 when an OFF signal is received from the control unit 31.

The radar detector 20 has a control section 23 , a storage section 24 and an interface section 25 . The control unit 23 is configured by a computer including a CPU, ROM, RAM, various peripheral circuits, and the like. The control unit 23 implements various functions of the radar detector 20 by executing the OS recorded in the ROM and the programs stored in the storage unit 24 . Various functions of the radar detector 20 are to 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, vehicle speed, water temperature, etc. of the vehicle 1). 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.), etc. for outputting each of the above information. Input devices include input operation devices such as touch panels for users to perform input and operations, 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 programs in the storage unit 24 include a display program for displaying various information received from the power supply control device 30 (for example, the engine speed, vehicle speed, water temperature, etc. of the vehicle 1) on the image output device.

The functions of the power control device 30 will be described below.

The power supply control device 30 has a power supply condition storage function, a noise detection function, a signal inspection function, a transmission/reception function, a power supply determination function, a power interruption determination function, a power supply control function, a power supply condition setting function, and a connection determination function. function and first and second special power supply functions.

The power supply condition storage function is a function for the power supply condition storage unit 32b1 to store the first to eighth power supply conditions.

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

The signal inspection function is a function in which the control unit 31 inspects whether or not there is a signal flowing on the in-vehicle network 7 via the signal terminal when the control unit 31 detects noise by the noise detection function.

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 in the program storage unit 32a. The send and receive functions include a first percussion function, a second percussion function and a communication function.

In the first sounding function, the control unit 31 transmits a sounding signal to the in-vehicle network 7 via the signal terminal when the control unit 31 detects that a signal is flowing on the in-vehicle network 7 by the signal inspection function. It is a function to The inquiry signal is a signal containing an identification number (eg, “xx0”) that specifies a specific vehicle-mounted computer 5 (eg, engine ECU) connected to the vehicle-mounted network 7 .

The second sounding function is performed by the control unit 31 via a signal terminal during a period from when the power supply determination function described later determines that the power supply condition is satisfied until the power interruption determination function described later determines that the power interruption condition is satisfied. This is a function of repeatedly transmitting a percussion 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 signals to and from the in-vehicle network 7 and the radar detector 20 according to the communication program stored in the program storage unit 32a. With the communication function, the control unit 31 transmits an inquiry signal for inquiring about the engine speed, vehicle speed, and water temperature to the in-vehicle network 7, and transmits a response signal indicating the engine speed, vehicle speed, and water temperature output from the in-vehicle network 7. Receive and transmit to radar detector 20 . Transmission and reception of the signal are performed at regular time intervals (eg, 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 answer signal specifies the computer that sent the answer signal. Identification information (for example, "xx8") for specifying 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 conditions 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 the signal flowing through the in-vehicle network 7 via the signal terminal for a certain period of time (for example, about 0.5 seconds) after the sounding function has transmitted the sounding signal. If the received 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 conditions are satisfied, and otherwise, it is determined that the power supply conditions are not satisfied. For example, when the DIP switch 54 is in the first switching state, the first power supply condition is specified. 31 judges whether the power feeding condition is satisfied, and otherwise judges whether the power feeding condition is not satisfied.

The power interruption determination function is a function for the control unit 31 to determine whether the power interruption conditions are met. Specifically, the control unit 31 inspects the signal flowing through the in-vehicle network 7 via the signal terminal for a certain period of time (for example, about 0.5 seconds) after the transmission of the sounding signal by the second sounding 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 cutoff condition is not satisfied, and otherwise it is determined that the power cutoff condition is satisfied. do. For example, when the DIP switch 54 is in the first switching state, the first power supply condition is specified. 31 judges whether the power interruption condition is not established, and in other cases, judges whether the power interruption condition is established.

In the power supply control function, the control unit 31 transmits an ON signal to the power supply switching unit 34 when the power supply determination function determines that the power supply condition is satisfied, and the power interruption determination function determines that the power supply condition is satisfied. is determined, the controller 31 transmits an OFF signal to the power switching unit 34, whereby the controller 31 controls power supply to the radar detector 20. FIG. By transmitting an ON signal 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 . By transmitting the OFF signal 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 the transmission and reception of a percussion signal and a response signal to the in-vehicle network 7 and power supply to the radar detector 20 in the conventional power control device (FIG. 4) and the power control device 30 (FIG. 5) of the first embodiment. shows a timing chart of “CANBUS” in the figure corresponds to the in-vehicle network 7 . The conventional power supply control device (FIG. 4) differs from the power supply control device 30 in that it does not have a signal inspection function, and the first sounding function transmits a sounding signal when the noise inspection function detects noise in the power supply. do.

As shown in FIG. 4(a), in "1. During normal operation", the non-engine system computer (shown as "CAN" in the figure) wakes up when the door is opened or closed or the ignition switch is set to the ACC position. up, and some data appears on the in-vehicle network. When the power control unit (Fig. 4) detects these data, it sends a request signal ("ID: xx0") to the engine ECU over the network (*1). (*2), power is not supplied to the radar detector 20 . While the non-engine computer is waking up, some signal (other CAN data) output by the non-engine computer or the like continues to flow through the in-vehicle network 7 .

When the ignition switch is set to the IG position or the engine is started, the noise inspection function detects the power supply noise (*3) generated thereby. As a result, the first sounding function transmits a sounding signal to the in-vehicle network 7 (*4), and the engine system computer outputs the response signal to the in-vehicle network 7 in response thereto. When the power supply determination function receives this response signal (*5) and determines that the power supply condition is established, the power supply control function starts power supply from the power supply terminal to the radar detector 20 (*6). After that, the second sounding function repeatedly transmits a sounding signal (*7). Since it is determined that it is not established, the power supply to the radar detector 20 continues, but when the ignition is turned off, the engine system computer is deactivated and the response signal to the percussion signal is not output (*9), so it is determined that the power is cut off. 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. The first sounding function sends a sounding signal to the in-vehicle network 7 (*12), but since the engine system computer is in sleep mode, no response signal is output to the in-vehicle network 7. Therefore, the power supply determination function does not meet the power supply condition. Establishment is not determined, and power is not supplied to the radar detector 20 . However, the transmission of the percussion signal of *12 wakes up the non-engine computer (*13), resulting in wasted current consumption. Since the wakeup state of the non-engine computer continues for a certain period of time, the current consumption is not small. Also, as shown in the figure, if the non-engine system computer wakes up (*13) many times due to the sounding signal being transmitted due to the power supply noise, the current consumption increases. It can also go 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 in-vehicle network 7 (*22).

At this time, if the non-engine system computer is in a wake-up state, as shown in FIGS. sends a percussion signal to the in-vehicle network 7 (*23).

Then, as shown in FIG. 5A, when the ignition is on, a response signal is output in response to the percussion signal of *23 (*24), so the power supply determination function determines whether the power supply condition is established, The power supply control function starts power supply to the radar detector 20 (*25). After that, the second sounding function repeatedly transmits a sounding signal (*26), and while the above-mentioned response signal is received from the vehicle-mounted network 7 (*27), the power supply determination function is kept under the power interruption condition. Since it is determined that it is not established, the power supply to the radar detector 20 continues, but when the ignition is turned off, the engine system computer sleeps and the response signal to the sounding signal is not output (*28), so it is determined that the power is cut off. The power supply control function cuts off the power supply to the radar detector 20 (*29).

On the other hand, if the ignition is off, as shown in FIG. 5B, the response signal to the percussion signal *23 is not output (*30). Therefore, no power is supplied to the radar detector 20 by the power supply control function.

Even if the noise inspection function detects power supply noise (*21), the signal inspection function does not detect the signal from the in-vehicle network 7 when the non-engine computer is sleeping. ), transmission of the percussion signal by the first percussion function is not performed.

As shown in FIGS. 5(a) and 5(b), in the power control device 30, transmission of the percussion signal by the first percussion function is performed when the non-engine system computer is in a wake-up state (* 23) Since the non-engine computer has already woken up, there is no problem of increased current usage. As shown in FIG. 5(c), when the non-engine computer is sleeping, the percussion signal is not transmitted. Therefore, the transmission of the percussion signal (*12) as shown in FIG. 4(c) causes the non-engine computer to wake up (*13), thereby avoiding the problem of an increase in current consumption.

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

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 . For inputting the power supply conditions to the radar detector 20, for example, the power supply conditions announced on the website of the manufacturer of the power supply control device 30 may be input using the input operation device of the interface unit 25. You may input by reading a power supply condition from media, such as an SD card, using a reading device. The control unit 31 receives the power supply conditions input from 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 manner described above.

Further, which one of the first to eighth power supply conditions is to be rewritten can be selected by operating the input operation device of the interface section 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 to rewrite.

In the first special power supply function, when the DIP switch 54 is in the second switching state, the control unit 31 controls the power supply terminal of the OBD connector 6 to the radar detector 20 regardless of whether the power supply condition is determined by the power supply determination function. It is a function to supply power to Since the power control device 30 has the first special power supply function, the user only needs to connect the power control device 30 to the OBD connector 6 and the radar detector 20 and set the DIP switch 54 to the second switching state. It becomes possible to receive power supply to 20 . Thus, the radar detector 20 can be used even if the user does not know the proper dip switch 54 settings for the user's vehicle, or if the user's vehicle does not support any of switching states 1-8. It is possible. The user can also set the power supply condition 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 power cannot be supplied because power supply conditions are not stored or set, and power supply conditions cannot be set because power is not supplied.

The connection determination function controls the transition from the disconnected state, in which the power supply control function cannot supply power to the external device, to the connected state, in which the power supply control function can supply power to the external device. 31 is a function to determine. 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 transition from the disconnected state to the connected state by detecting the voltage of the power supply terminal of the OBD connector 6, for example.

In the second special power supply function, when the connection determination function determines that the control unit 31 has transitioned from the disconnected state to the connected state, the control unit 31 determines whether or not the power supply condition is satisfied by the power supply determination function. It is a function of supplying power to the radar detector 20 from the power supply terminal 6. Since the power control device 30 has the second special power supply function, the user can receive power supply to the radar detector 20 by switching the power control device 30 from the disconnected state to the connected state. Thus, the radar detector 20 can be used even if the user does not know the proper dip switch 54 settings for the user's vehicle, or if the user's vehicle does not support any of switching states 1-8. In addition, the user can set the power supply condition using the power supply condition setting function while power is being supplied to the radar detector 20 by the second special power supply function. As a result, it is possible to prevent the dilemma that power cannot be supplied because power supply conditions are not stored or set, and power supply conditions cannot be set because power is not supplied.

The program update function is a function in which the control unit 31 updates the communication program in the program storage unit 32 a and the display program in the storage unit 24 as a set based on update information input to the radar detector 20 . For example, in the communication program before update, the control unit 31 transmits the above inquiry signal about the engine speed, vehicle speed, and water temperature to the in-vehicle network 7, and indicates the engine speed, vehicle speed, and water temperature output from the in-vehicle network 7. It is a program for realizing a communication function in which the control unit 31 receives a response signal and transmits it to the radar detector 20. The display program displays the engine speed, the vehicle speed, and the speed based on the response signal received from the power supply control device 30. In the case where the control unit 23 is a program that realizes a display function for displaying the water temperature on the image display device of the radar detector 20, the program update function causes the control unit 31 to change the temperature based on the update information input to the radar detector 20. Then, the control unit 31 transmits a communication program, an inquiry signal about the engine speed, vehicle speed, water temperature, and outside temperature to the in-vehicle network 7, and the engine speed, vehicle speed, water temperature, and outside temperature output from the in-vehicle network 7. is updated to a program that realizes the function of receiving and transmitting a response signal indicating to the radar detector 20 by the control unit 31, and the display program is updated based on the response signal received from the power supply control device 30. , vehicle speed, water temperature, and outside air temperature are updated to a program that realizes the function of displaying the vehicle speed, water temperature, and outside air 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 on media such as an SD card using the reading device of the interface unit 25, or by reading the update information on the Internet through the communication device of the interface unit 25. This is done by downloading using

Preferred embodiments have been described above, but the shapes, dimensions, materials, operation modes, control modes, control parameters, operation modes, etc. of devices, systems, programs, functions or elements thereof, members, etc. in the above embodiments are examples. , and these can be modified as exemplified below.

<First modification>
For example, in the above-described first embodiment, the power supply determination function determines whether the power supply condition is established when the response signal to the percussion signal transmitted by the first percussion function includes specific identification information. may determine success or failure of the power supply condition based on the number of pieces of identification information in the response signal or other parameters.

FIG. 6 shows identification information (a part of which is an "ID example") contained 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 (shown 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 electrical components but cannot run, and a Ready state in which the vehicle can run.

As shown in the figure, in vehicle B, the signal having the identification information "BB2" is output only when the ignition switch is in the IG position and when it is in the Ready position. It is possible to determine whether or not the power supply condition is established based on the identification information (determine whether the power supply condition is established when a signal having the identification information “BB2” is detected).

(First modification-1 Determination of success or failure of power supply conditions 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, compared to other states, the When the number of pieces of identification information is clearly large, and the number of pieces of identification information is a certain number or more (for example, 50 or more), it can be determined that the ignition switch is in the IG position or ready. Utilizing this, in the power supply control device 30 of the first modified form-1, the power supply determination function determines whether the power supply condition is satisfied when the number of identification information is equal to or greater than a certain number, It is judged that the power interruption condition is established based on the fact that it is less than.

(First Modification-2 Judgment of Success or Failure of Power Supply Conditions Based on Response Signal Parameters)
In addition, the signal having the identification information "AA1" is output not only when the ignition switch is in the IG position and when it is Ready, but also during wake-up, ACC, and for a while after the ignition is turned off. However, the D5 bit at the 5th byte of the signal changes state only when the ignition is on (from "0" to "1"), so 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 modification-2, the power supply determination function determines that the power supply condition is established when the D5 bit of the 5th byte of the signal having the identification information "AA1" is "1". If the D5 bit is "0", it is determined whether the power interruption condition is established. In the first modified form-2, the power supply determination function may determine whether the power supply condition and the power interruption condition are satisfied based on other parameters of the response signal.

<Second modification>
In the above-described first embodiment, it may be possible to selectively implement the success/failure determination of the power supply condition based on the number of identification information and/or the success/failure determination of the power supply condition based on the parameters of the response signal. 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 conditions based on the identification information), and the other one or more is the first Information for judging the success or failure of the power supply condition based on the number of identification information described in Modification-1, and the other one or more is the success or failure of the power supply condition based on the parameters of the response signal described in First Modification-2. It can be information for making a decision. In this way, it becomes possible to judge the state of the vehicle (whether the ignition switch is in the IG position or Ready) more appropriately according to the type of vehicle, and to supply power, thereby supporting a wider range of vehicle types. be possible.

<Third Modification>
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 in-vehicle 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 determination mode is the same as in the first modification, the first modification-1, or the first modification-2. For example, in a vehicle of a specific type, if the identification information contained in the signal flowing through the in-vehicle network 7 according to the state of the vehicle and the number thereof are as shown in FIG. ), it is determined that "the ignition switch is in the IG position or Ready".
(1) When a signal having identification information “BB2” is detected (2) When the number of identification information is a certain number or more (for example, 50 or more) (3) 5th byte of a signal having identification information “AA1” If the D5 bit of is "1"

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

The power supply condition storage function in the third modified mode stores, as all or part of the first to eighth power supply conditions, the state of the vehicle in the above aspects (1) to (3) for one or a plurality of types of vehicles. One or more pieces of information for making 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 modification can perform power supply control according to the state of the vehicle owned by the user. become.

In the third modification, even in a vehicle that responds to a signal from the outside for a while after the ignition is turned off, such as an imported vehicle or a recent vehicle, power is supplied when the ignition is turned off. It is good because it can be blocked. Also, in idling stop vehicles, even if idling is stopped at an intersection or the like, as long as the ignition switch is in the IG position or in the Ready state, power is supplied, so there is a problem that the power of external devices is turned off each time idling is stopped. It is good because it can be resolved.

<Third modified form-1>
In the third modification, even if the noise detection function, the signal inspection function, the first and second percussion functions, the power supply determination function, the power interruption determination function, and the power supply control function are omitted, the constant inspection function, 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-1 has a noise detection function, a signal inspection function, a first and second percussion function, a power supply determination function, a power interruption determination function, and a power supply control No function. By doing so, the functions of the power control device 30 can be simplified and the price can be reduced.

<Fourth Modification>
FIG. 7 shows the system configuration of the power control device 30 of the fourth modification. As illustrated, the power control device 30 of the fourth modification has a first information storage section 32b2 and a second information storage section 32b3 in addition to the system configuration of the first embodiment.

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

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

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

More specifically, the first information storage function (1) instructs the user to place the vehicle in the first state, and then (2) confirms that the vehicle has been placed in the first state. and (3) storing, in the first information storage function, information about the signal flowing through the in-vehicle network when the operation is detected. The second information storage function (4) instructs the user to put the vehicle in the second state (eg, the ignition is on), and then (5) puts the vehicle in the second state. and (6) storing, in the second information storage function, information about the signal flowing through the in-vehicle network when the operation is detected. These instructions are displayed and operations are accepted through input/output of information to/from the input/output device of the radar detector 20 . As a result, while simplifying the power supply control device 3, the user can easily perform the operation for storing information by the first and second information storage functions. For example, (1)
, (4), the user may be instructed to put the vehicle in the first and second states through the liquid crystal monitor, 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 are established, respectively, the user's operation becomes easier. Whether the vehicle is in the first or second state may be determined by transmitting a sounding signal from the power supply control device 30 to the in-vehicle network 7 and detecting a response signal therefrom. The execution 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 modification is such that when a signal containing the identification information stored in the power supply condition storage unit 32b1 by the second power supply condition setting function is flowing through the in-vehicle network 7, the vehicle state is determined. is "the ignition switch is in the IG position or Ready".

In the fourth modification, the case of using identification information as information to be stored in the first and second information storage functions has been described. ) may be used as a variant.

<Fourth modified form-1>
In the power supply control device 30 of the fourth modified form-1, the second power supply condition setting function uses the identification information of the signal with the shortest period as the power supply condition when there is a plurality of pieces of identification information of the difference. 32b1. For example, since the cycle of the signal from the engine ECU is short, in the fourth modification-1, the power supply to the external device can be controlled more reliably when the engine ECU is awake.
In the above-described embodiment, as described with reference to FIG. 7, the noise detector 33 is connected to the DC conversion circuit through the AC component passing circuit 41, the filter 42, the amplifier circuit 43, the rectification circuit 44, and the DC conversion circuit 45, respectively. 45 to the control unit 31 for noise detection, the DC conversion circuit 45 may be eliminated and the output of the rectifier circuit 44 may be input to the control unit 31, for example. In this way, it is possible to discriminate the types of noise, such as the noise when starting the starter motor, the voltage effect noise due to the inrush current of the hazard flashing of the vehicle accompanying door locking, and the noise of the voltage drop due to the inrush current when the IG is turned on. Also, the output of the amplifier circuit 43 may be input to the control section 31 . In this way, the type of noise can be discriminated from the frequency superimposed on the power supply and the level of the power supply.
<Other Modifications>
Although it is preferable that the in-vehicle network is CAN, it is possible to use a vehicle manufacturer's proprietary network, LIN (Local Interconnect Network), BEAN (Body Electronics Area Network), FlexRay for high-speed control system, and MOST (Media Oriented System Transport) for information system. ), etc.

REFERENCE SIGNS LIST 1 vehicle 2 engine 3 alternator 3 power control device 4 car battery 5 vehicle computer 6 OBD connector 7 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 part 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 power storage unit 32b2 First information storage unit 32b3 Second information storage unit 33 Noise detection unit 34 Power supply switching unit 41 Component passing circuit 42 Filter 43 Amplifier circuit 44 Rectifier circuit 45 Conversion circuit 51 Housing 52 Connector 53 Connector 54 DIP switch

Claims (6)

A communication program that controls communication of information between an in-vehicle network and an external device , a communication program update function that updates the communication program, and a device based on power supplied from the vehicle when predetermined power supply conditions are met. The external device connected to a power supply control device that has a power supply control function that cuts off the power supply to the equipment based on the power supplied from the vehicle when the power supply to the vehicle is started and a predetermined power interruption condition is satisfied. There is
The device has an update information input function for receiving input of update information from the outside and a display program for displaying the information received from the power control device,
A function of updating the communication program of the power control device and updating the display program of the device as a set ,
The device starts supplying power to the equipment based on the power supplied from the vehicle when the predetermined power supply condition is satisfied, and starts supplying power to the equipment based on the power supplied from the vehicle when the predetermined power interruption condition is satisfied. It operates by receiving power supply from a power supply control device having a power supply control function to cut off power supply, and based on the update information input from the outside by the update information input function of the device, the power supply control device Updating the communication program and updating the display program of the device as a set
A device characterized by The power supply control device has a function of acquiring information from the in-vehicle network and power supplied from the vehicle from the OBD connector of the vehicle and supplying power to the device,
2. The device according to claim 1, wherein the device controls display for the driver based on the information from the in-vehicle network by the display program. As the communication program, an inquiry signal regarding engine speed, vehicle speed or water temperature is transmitted to the in-vehicle network, and a signal indicating the engine speed, vehicle speed or water temperature output from the in-vehicle network is received and transmitted to the device. Equipped with a program to realize a communication function that
The display program comprises a program for realizing a display function of displaying the engine speed, vehicle speed or water temperature based on a signal indicating the engine speed, vehicle speed or water temperature received from the power control device,
The function of performing the update of the communication program of the power supply control device and the update of the display program of the device as a set is to update the communication program based on the update information input to the device. to the in-vehicle network, receive a signal indicating the engine speed, vehicle speed or water temperature output from the in-vehicle network and transmit it to the device, and 3. The display program according to claim 1, further comprising a function of updating the display program to a program that realizes a function of displaying engine speed, vehicle speed, or water temperature based on a signal received from the power control device. machine. 4. The program update function has a function of updating the communication program and the display program as a set when the update information input function receives input of the update information. A device as described in any of the preceding paragraphs. 5. The device according to any one of claims 1 to 4, wherein said update information is commands, programs and/or data for updating said communication program and said display program. A program for causing a computer to implement the functions of the device according to any one of claims 1 to 5.

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