JP2014035647A - Power saving control system and power saving control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power saving control system which can maintain user's convenience and also perform power saving control of an on-vehicle electronic apparatus when the vehicle is parked by changing an intermittent activation cycle of the on-vehicle electronic apparatus according to a position and a time zone of the parked vehicle.SOLUTION: A power saving control system comprises an on-vehicle electronic apparatus which is intermittently activated while a vehicle is stopped, and performs power saving control by changing an activation cycle of the on-vehicle electronic apparatus. The power saving control system comprises: a clock unit 114; a navigation ECU 12; a storage unit 112 which stores in association, a time zone and a position at which the on-vehicle electronic apparatus has been activated and has operated and a frequency at which the on-vehicle electronic apparatus has operated at the time zone and the position: a frequency identification unit which identifies a frequency at which the on-vehicle electronic apparatus has operated at the current time zone and the vehicle position in the past on the basis of information stored in the storage unit 112; and a cycle change unit which changes a cycle at which the on-vehicle electronic apparatus is to be intermittently activated according to the frequency identified by the frequency identification unit.

Description

  The present invention relates to a power saving control system and a power saving control device that perform power saving control of an in-vehicle electronic device during parking.

  Various in-vehicle electronic devices are mounted on the vehicle, and there are some vehicles that cannot be stopped even when the vehicle is parked. For example, in-vehicle electronic devices such as a security control ECU that performs processing related to theft prevention, a keyless reception ECU that wirelessly locks and unlocks doors, a smart reception ECU, and a body ECU that performs electric door lock control operate even during parking It is necessary to keep it. This is because it is difficult to predict when the theft and boarding events will occur, and if the power supply to these in-vehicle electronic devices is completely stopped, the alarm will not sound even if the theft is encountered. This is because even when trying to board, the problem that the unlocking is impossible and the boarding is impossible occurs.

  However, if these in-vehicle electronic devices are fully operated during parking, the battery is quickly consumed, and the so-called battery is exhausted. For this reason, the said vehicle-mounted electronic device is performing the intermittent wakeup operation | movement started intermittently, and is operate | moving in the power saving state. For example, the keyless receiving ECU is activated at certain time intervals to receive radio waves, and when a predetermined signal is detected, performs a power saving operation such as returning to a normal operation state and performing keyless control. If the start cycle of the intermittent wakeup operation is shortened, the responsiveness of the in-vehicle electronic device is improved, but the power saving effect is lowered. Conversely, if the start cycle of the intermittent wakeup operation is lengthened, the responsiveness of the in-vehicle device is reduced, but the power saving effect is improved.

On the other hand, as another power saving control technique, Patent Literature 1 discloses an energization control device that learns the usage state of an electrical device and stops energization of the electrical device during a time period when energization is not necessary. Yes.
Patent Document 2 discloses an energization system that determines a use situation of a vehicle and controls a power supply state for a plurality of electronic devices mounted on the vehicle for each use situation of the vehicle. The energization system is a system that saves power based on the insight that the in-vehicle electronic device used by the vehicle user is biased according to the usage situation of the vehicle. Specific usage scenes are assumed to be a commuting situation, a business use situation, a leisure use situation, a travel use situation, and the like.

JP 2001-344027 A JP 2011-28338 A

  However, the in-vehicle electronics function is increasing year by year, and there is a possibility that the battery may be raised even if the intermittent wake-up operation is performed. For this reason, more effective power saving control in consideration of the position, time zone, etc. of the parked vehicle is required.

In the energization control device of Patent Document 1, the position where the electric device is used is not considered, and power saving control considering the parking position of the vehicle cannot be performed.
The energization system of Patent Document 2 performs power saving control when the vehicle is used, but does not perform power saving control of the in-vehicle electronic device during parking, and cannot solve the above-described problem.

  The present invention has been made in view of such circumstances, and its purpose is to maintain convenience by changing the intermittent activation cycle of the in-vehicle electronic device according to the position, time zone, etc. of the parked vehicle. An object of the present invention is to provide a power saving control system and a power saving control device capable of performing power saving control of an in-vehicle electronic device during parking.

  A power saving control system according to the present invention includes an in-vehicle electronic device that is intermittently activated when the vehicle is stopped, and the power saving control system that performs power saving control by changing the activation cycle of the in-vehicle electronic device. , A position detection unit that detects its own position, a time zone and a position when the in-vehicle electronic device is activated and operated, and a frequency at which the in-vehicle electronic device is operated in the time zone and the position are stored in association with each other And the frequency at which the in-vehicle electronic device has operated in the past at the time measured by the clock unit and the position detected by the position detection unit based on the time zone, position and frequency stored in the storage unit. And a frequency changing unit that changes a cycle in which the in-vehicle electronic device is intermittently activated according to the frequency specified by the frequency specifying unit.

  In the power saving control system according to the present invention, when the frequency specified by the frequency specifying unit is high, the cycle changing unit changes the cycle at which the in-vehicle electronic device is intermittently started to the first cycle, When the frequency specified by the frequency specifying unit is low, the frequency is changed to a second period lower than the first period.

  The power saving control system according to the present invention includes a determination unit that determines whether the frequency at which the in-vehicle electronic device has been operated in the past at a position detected by the position detection unit is equal to or higher than a predetermined threshold. The period changing unit determines that the determining unit is equal to or greater than the threshold value, and when the frequency specified by the frequency specifying unit is low, changes to the second period and determines that the determining unit is less than the threshold value. In this case, the first period is changed regardless of the frequency specified by the frequency specifying unit.

  In the power saving control system according to the present invention, the period changing unit determines that the determination unit is equal to or greater than the threshold, and stores the time measured by the clock unit and the position detected by the position detection unit. When the unit does not store, the period when the in-vehicle electronic device is intermittently activated is changed to a period less than the second period.

  The power-saving control system according to the present invention includes a raindrop detection unit that detects raindrops, and the period changing unit, when detecting raindrops by the raindrop detection unit, relates to the frequency specified by the frequency specifying unit. The on-vehicle electronic device is intermittently activated at a period that is changed to a period equal to or greater than the first period.

  The power saving control system according to the present invention includes a temperature detection unit that detects an air temperature, and the period changing unit is specified by the frequency specifying unit when the temperature detected by the temperature detection unit is less than a threshold temperature. Regardless of the frequency with which the vehicle-mounted electronic device is operated, the cycle in which the in-vehicle electronic device is intermittently started is changed to a cycle equal to or greater than the first cycle.

  The power saving control system according to the present invention includes a plurality of in-vehicle electronic devices, the storage unit stores a frequency at which one in-vehicle electronic device is activated and operated, and the cycle changing unit includes the plurality of in-vehicle electronic devices. The vehicle-mounted electronic device is configured to change the cycle at which it is intermittently activated.

  In the power saving control system according to the present invention, the one on-vehicle electronic device is an ECU that controls locking and unlocking of a door of a vehicle.

  A power-saving control device according to the present invention is a power-saving control device that controls a cycle in which an external device is intermittently started. In the power-saving control device, a clock unit, and a position detection unit that acquires position information indicating the position of the external device; A storage unit that stores a time zone and a position when the external device is activated and operated, and a frequency at which the external device is operated in the time zone and the position, and a time zone that the storage unit stores A frequency specifying unit for specifying a frequency at which the external device has operated in the past at the time indicated by the time and the position information acquired by the position detection unit based on the position and the frequency, and the frequency And a cycle changing unit that changes a cycle in which the external device is intermittently started according to the frequency specified by the specifying unit.

  In this invention, a memory | storage part matches and memorize | stores the time slot | zone and position when a vehicle-mounted apparatus operate | moved, and the frequency which the said vehicle-mounted electronic device started and operate | moved in this time slot | zone and position. Note that the frequency at which the in-vehicle electronic device is operated is not simply the frequency at which the in-vehicle electronic device is activated, but the frequency at which a predetermined process is executed after the in-vehicle electronic device is activated. In a time zone and a position where the frequency of operation is high, there is a high possibility that the in-vehicle electronic device is used, and in a situation where the frequency is low, the possibility that the in-vehicle electronic device is used is low. Therefore, the frequency identification unit identifies the frequency at which the in-vehicle electronic device has operated in the past at the time measured by the clock unit and the position detected by the position detection unit based on the information in the storage unit. That is, the frequency specifying unit specifies the frequency at which the in-vehicle electronic device operates in the same situation as the current situation. Needless to say, it is not necessary that the current time and position of the vehicle and the time zone and position in which the in-vehicle electronic device has operated in the past be completely coincident, and the time zone and position are within a certain range. What is necessary is just to identify the frequency of matching. And a frequency change part changes the period which a vehicle-mounted electronic device starts intermittently according to the frequency with which the vehicle-mounted electronic device operated in the situation similar to the present. By increasing the intermittent start cycle of the in-vehicle electronic device according to the frequency, it is possible to save power in the in-vehicle electronic device.

  In the present invention, when the frequency specified by the frequency specifying unit is high, the in-vehicle electronic device is intermittently activated at the first cycle of the high cycle, and when the frequency specified by the frequency specifying unit is low, It is intermittently activated at the first cycle.

In the present invention, the determination unit determines whether the frequency at which the in-vehicle electronic device is operated at the position detected by the position detection unit is equal to or higher than a threshold value. In other words, the determination unit determines whether the frequency with which the in-vehicle electronic device is used at the current position is high regardless of the difference in time zone. In other words, it is determined whether the vehicle used is in an unguided place. When the determination unit determines that the frequency is equal to or higher than the threshold value and the frequency specified by the frequency specifying unit is low, the vehicle-mounted electronic device is intermittently activated in the second cycle having a low cycle.
When it determines with a determination part being less than a threshold value, regardless of the frequency specified by the frequency specific | specification part, a vehicle-mounted electronic device is intermittently started by a 1st period.
Therefore, when there is a vehicle in an unguided place, the in-vehicle electronic device gives priority to convenience, and is activated intermittently at a high cycle regardless of the situation in which the in-vehicle electronic device has been used in the past. When there is a vehicle in a familiar place with high parking frequency, the in-vehicle electronic device gives priority to power saving efficiency, and starts intermittently in the second cycle with a low and high cycle according to the frequency specified by the frequency specifying unit.

  In the present invention, when the determination unit determines that the frequency is equal to or greater than the threshold and the storage unit does not store the frequency corresponding to the current time and position, the in-vehicle electronic device is intermittent with a period less than the second period. to start.

  In the present invention, when the raindrop detection unit detects a raindrop, the in-vehicle electronic device gives priority to convenience and starts up intermittently with a period equal to or greater than the first period.

  In the present invention, when the air temperature detected by the temperature detection unit is lower than the threshold temperature, the in-vehicle electronic device gives priority to convenience and is intermittently activated at a period equal to or higher than the first period.

  In the present invention, a cycle in which a plurality of in-vehicle electronic devices are activated intermittently is changed based on a time zone, a position, and a frequency at which one in-vehicle electronic device is operated among a plurality of in-vehicle electronic devices. The plurality of in-vehicle electronic devices may or may not include one in-vehicle electronic device.

  In the present invention, the period at which a plurality of in-vehicle electronic devices are activated intermittently is changed based on the time zone, position, and frequency at which the ECU that controls locking and unlocking of the vehicle door is operated.

  According to the present invention, by changing the intermittent activation cycle of the in-vehicle electronic device according to the position, time zone, etc. of the parked vehicle, power saving control of the in-vehicle electronic device during parking is performed while maintaining convenience. be able to.

It is a block diagram which shows the example of 1 structure of the power saving control system which concerns on this Embodiment. It is a timing chart which shows the method of intermittent starting control notionally. It is a conceptual diagram which shows an example of a learning table. It is a conceptual diagram which shows an example of a power saving table. It is a flowchart which shows the process sequence of the control part which concerns on registration of a learning table. It is a flowchart which shows the process sequence of the control part which concerns on registration of a power saving table. It is a flowchart which shows the process sequence of the control part which concerns on power saving. It is a chart which shows an example of the contents of control concerning power saving.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
FIG. 1 is a block diagram illustrating a configuration example of a power saving control system 1 according to the present embodiment. A power saving control system 1 according to the present embodiment includes a power saving control device 11 according to the present invention mounted on a vehicle 100, a navigation ECU 12, a body ECU 13, connected to the power saving control device 11 via an in-vehicle LAN 17, A keyless reception ECU 14, a smart transmission / reception ECU 15 and a sensor ECU 16 are provided.

The power saving control device 11 includes a control unit 111 that controls the operation of each component of the power saving control device 11, for example, one or a plurality of CPUs (Central Processing Units), a multi-core CPU, and the like. A storage unit 112, a RAM 113, a clock unit 114, and a CAN (Controller Area Network) communication I / F 115 are connected to the control unit 111 via a bus.
In addition, although the power saving control apparatus 11 is comprised separately from other ECU, you may implement | achieve the function of this power saving control apparatus 11 with other ECUs, such as body ECU13 and navigation ECU12.

  The storage unit 112 is a non-volatile memory such as an EEPROM (Electrically Erasable Programmable ROM), and stores a computer program for performing power saving control according to the present embodiment. The storage unit 112 stores a learning table 112a and a power saving table 112b. Details of the learning table 112a and the power saving table 112b will be described later.

  The RAM 113 is a memory such as a DRAM (Dynamic RAM) or an SRAM (Static RAM), and is executed by a computer program read from the storage unit 112 when the calculation process of the control unit 111 is executed, or by a calculation process of the control unit 111. Temporarily store various data generated.

  The clock unit 114 counts the year, date and time, and gives the timing result to the control unit 111 in accordance with a request from the control unit 111.

  The CAN communication I / F 115 is connected to other various ECUs mounted on the vehicle 100 via the in-vehicle LAN 17, and transmits / receives data to / from other ECUs according to the CAN protocol. CAN communication I / F 115 transmits data given from control unit 111 and gives data received from another ECU to control unit 111. As a result, the power saving control device 11 can acquire information obtained from the in-vehicle devices connected to the various ECUs by the CAN communication I / F 115, and also issue an operation command to the in-vehicle devices connected to other ECUs. It is possible to control the operation of the in-vehicle device by transmitting.

  The navigation ECU 12 includes, for example, a CPU, a RAM, a ROM that stores a navigation program, a GPS receiver, a CAN communication I / F, and the like. The GPS receiver constitutes a GPS system together with an artificial satellite (GPS satellite), receives radio waves from the artificial satellite, and calculates the position of the vehicle 100. The navigation ECU 12 calculates a travel route based on the calculated travel position and destination of the vehicle, displays map information, and performs driver guidance control according to the travel route. In addition, the navigation ECU 12 has a function of transmitting information on the calculated position to the power saving control device 11 in response to a request from the power saving control device 11.

The body ECU 13 is a control device that controls body-based in-vehicle devices, and controls in-vehicle devices such as headlights, turn hazards, wipers, and door lock mechanisms mounted on the vehicle 100. That is, the body ECU 13 receives user operations, controls turning on and off of headlights and turn hazards, on / off or intermittent operation of the wiper, and controls locking / unlocking of the door lock mechanism.
Further, the body ECU 13 has a function of determining whether or not the vehicle 100 is operated by an illegal or abnormal procedure, and issuing an alarm when an illegal or abnormal procedure is detected.

  The keyless reception ECU 14 includes, for example, a receiver that receives an unlock signal and a lock signal wirelessly transmitted from a portable key, a CAN communication I / F, and the like. The portable key is provided with a locking button for locking the door of the vehicle 100 and an unlocking button for unlocking. When the lock button or the unlock button of the portable key is pressed, control information and an authentication code instructing to lock or unlock the door are transmitted. When the keyless receiving ECU 14 receives the control information and the authentication code at the receiver, authenticates with the authentication code, and succeeds in authenticating that the control information is from the authorized mobile key, the keyless receiving ECU 14 locks or unlocks the door. Is transmitted to the body ECU 13 via the in-vehicle LAN 17. The body ECU 13 locks or unlocks the door in accordance with the locking command or unlocking command from the keyless reception ECU 14. The keyless reception ECU 14 transmits a signal notifying that the door is locked or unlocked to the power saving control device 11.

  The smart transmission / reception ECU 15 includes, for example, a transmitter that transmits a request signal to the outside, a receiver that receives a response signal from a portable key, a touch operation detection unit that detects a touch operation on a door outside handle, and a CAN communication I / F. Etc. Smart transmission / reception ECU 15 transmits a request signal to the outside of vehicle 100 by a transmitter. When the portable key receives the request signal, the portable key transmits a response signal. The smart transmission / reception ECU 15 receives the response signal from the portable key, compares the encryption code included in the response signal with the encryption code stored in advance, and determines whether the response is from the regular portable key. Certify. When the smart transmission / reception ECU 15 detects a touch operation on the door outside handle in a state where the authentication is successful, the smart transmission / reception ECU 15 transmits an unlocking instruction for instructing unlocking of the door to the body ECU 13 via the in-vehicle LAN 17. The body ECU 13 unlocks the door in accordance with the unlock command from the smart transmission / reception ECU 15. Further, the smart transmission / reception ECU 15 transmits a signal notifying that the door has been unlocked to the power saving control device 11.

The sensor ECU 16 includes, for example, a CPU, a RAM, a ROM, a raindrop sensor 16a, an illuminance sensor 16b and a temperature sensor 16c, a CAN communication I / F, and the like.
The raindrop sensor 16a is, for example, an optical sensor, a light emitting element that emits light toward the windshield of the vehicle 100, a light emitting side lens that converts the light of the light emitting element into parallel light and totally reflects it on the outer surface of the windshield, A light receiving element that receives the light reflected by the shield is provided, and raindrops are detected by a change in the amount of light received by the light receiving element. If there are raindrops on the windshield, the light intensity will decrease. In addition, you may comprise so that a raindrop may be detected by detecting the vibration which generate | occur | produces when a raindrop collides with a windshield.
The illuminance sensor 16b is provided at an appropriate location of the vehicle 100, and includes elements such as CdS and a photodiode that convert light applied to the vehicle 100 into voltage or current.
The temperature sensor 16c includes, for example, a thermistor, and detects the temperature by detecting the electrical resistance of the thermistor that changes according to the temperature.
The CAN communication I / F 115 has a function of transmitting information such as illuminance, presence / absence of raindrops, and temperature to the power saving control device 11 in response to a request from the power saving control device 11.
In the present embodiment, the sensor ECU 16 is configured separately from the power saving control device, but the raindrop sensor 16a, the illuminance sensor 16b, and the temperature sensor 16c may be provided in the power saving control device 11 or another ECU. .

  FIG. 2 is a timing chart conceptually showing a method of intermittent activation control. Each ECU is activated intermittently, that is, intermittently when the vehicle 100 is parked. The power saving control device 11 can set a cycle for performing intermittent wakeup for each ECU, and each ECU is intermittently started at the set cycle during parking. The intermittent activation cycle is measured by a clock unit such as a clock (not shown), and an activation signal is provided to the CPU of the ECU. The horizontal axis in FIG. 2 indicates time. The rectangular pulse portion indicates a period in which each ECU is activated and in an operable state. In other periods, each ECU is stopped. 2A shows a cycle in which each ECU is intermittently started in the “normal” mode, FIG. 2B shows a cycle in which each ECU is intermittently started in the “power saving” mode, and FIG. 2C is a “maximum power saving” mode. The period when each ECU starts intermittently is shown. The intermittent activation cycle in the “normal” mode is, for example, about 10 Hz. The intermittent start cycle in the “power saving” mode is lower than the intermittent start cycle in the “normal” mode, and the power saving effect is high. Similarly, the intermittent activation cycle in the “maximum power saving” mode is lower than the intermittent activation cycle in the “power saving” mode, and the power saving effect is high.

FIG. 3 is a conceptual diagram illustrating an example of the learning table 112a. The learning table 112a includes a plurality of columns (fields), for example, a “day or holiday” column, a “time zone” column, a “position” column, a “frequency” column, a “frequency ranking” column, and the like. Record) has information corresponding to each column.
The “day of the week or holiday” column stores information indicating the day of the week or the like when the door is unlocked or locked. In the “day of the week or holiday” column, “Month”, “Tue”, “Wed”, “Thurs”, “Fri”, “Sat”, “Sun” or “Holiday” information is registered. “Holidays” are holidays or days corresponding to paid holidays, summer holidays, year-end and new year holidays, consecutive holidays, etc. registered by the user. The “time zone” column stores the time when the door is unlocked or locked, and the “position” column stores the position when the door is unlocked or locked. The “Frequency” column stores the frequency at which the door is unlocked or locked in the situation indicated by the time zone and position, such as the corresponding day of the week. The “frequency ranking” column stores the frequency ranking in which the door is unlocked or locked in this situation. The frequency rank is a rank of the frequency at which the situation registered in the learning table 112a occurs.

  FIG. 4 is a conceptual diagram illustrating an example of a power saving table. The power saving table 112b includes a plurality of columns, for example, a “day or holiday” column, a “time zone” column, a “position” column, a “power saving control” column, and the like, and each row corresponds to each column. Have information. The “power saving control” column stores the type of power saving mode in which each ECU is operated in a situation indicated by a time zone and a position such as a corresponding day of the week. The other columns store the same information as the learning table 112a.

  FIG. 5 is a flowchart showing a processing procedure of the control unit 111 related to registration of the learning table 112a. At the initial time, information is not registered in the learning table 112a. The control unit 111 creates the learning table 112a by periodically executing the following processing. The control unit 111 makes an inquiry to the keyless reception ECU 14, the smart transmission / reception ECU 15, or the body ECU 13 and determines whether the door is locked or unlocked (step S11). When it is determined that the door is not locked or unlocked (step S11: NO), the control unit 111 ends the process. When it is determined that the door is locked or unlocked (step S11: YES), the control unit 111 acquires various parameters (step S12), and the keyless reception ECU 14 in the situation indicated by the acquired parameters and each parameter. The frequency at which the smart transmission / reception ECU 15 or the body ECU 13 operates is registered in the learning table 112a (step S13).

Specifically, the control unit 111 acquires position information from the navigation ECU 12 via the in-vehicle LAN 17 and registers it in the “position” column of the learning table 112a. The position information is, for example, numerical information indicating latitude and longitude. The accuracy of latitude and longitude is such that the position can be identified in units of 100 m, for example.
Further, the control unit 111 acquires the current day of the week or holiday information and time information from the clock unit 114. Then, the control unit 111 stores information indicating the day of the week or holiday in the “day of the week or holiday” column of the learning table 112a. The storage unit 112 stores, for example, information for determining whether the current day is a holiday, and the control unit 111 unlocks or locks the door based on the time measurement result of the clock unit 114 and the information. Determine if the time falls on a holiday. If it is determined that it falls on a holiday, “holiday” is stored in the “day of the week or holiday” column. If it is determined that it does not fall on a holiday, the day of the week is identified according to the calendar, and the identified day of the week is stored in the “day of the week or holiday” column. The holidays are not limited to holidays, and may be days that are registered by the user, such as paid holidays, summer holidays, year-end and new year holidays, consecutive holidays, and the like.
Further, the control unit 111 stores the time zone corresponding to the current time in the “time zone” column of the learning table 112a. The control unit 111 manages, for example, 24 hours divided into 8 time zones with a 3-hour interval.
Furthermore, when the registration information indicated by the same combination of parameters is already registered in the learning table 112a, the control unit 111 adds 1 to the number of frequencies stored in the “frequency” column of the registration information. The frequency after the addition is registered in the “frequency” column. When the number of “frequency” reaches a predetermined upper limit, the frequency is not added. For example, if the number of frequencies registered in the “Frequency” column reaches the upper limit of 65-bit integer, 65535, the number of frequencies is left as the upper limit. When the registration information indicated by the same parameter combination does not exist in the learning table 112a, the various parameters described above are registered in the learning table 112a, and 1 is stored in the “frequency” column.

  The control unit 111 that has finished the process of step S13 calculates the frequency rank of each registered information based on the number of frequencies corresponding to each registered information registered in the learning table 112a (step S14), and the calculated frequency The rank is stored in the “frequency rank” column (step S15).

  Next, the control unit 111 determines whether or not the registration information has been registered in all the rows of the learning table 112a (step S16). When it is determined that some rows of the learning table 112a are unregistered (step S16: NO), the control unit 111 ends the process. When it is determined that the registration information exists in all the rows of the learning table 112a (step S16: YES), the control unit 111 deletes the registration information having the lowest frequency order (step S17) and ends the process.

  FIG. 6 is a flowchart illustrating a processing procedure of the control unit 111 related to registration of the power saving table 112b. The control unit 111 creates the power saving table 112b by creating the learning table 112a and executing the following process at an appropriate timing. At a predetermined timing, the control unit 111 calculates the total value S of the frequency values stored in the “frequency” column of the learning table 112a (step S31), and whether the calculated total value S is equal to or less than the first threshold value. It is determined whether or not (step S32). The first threshold is 50, for example. If it is determined that the total value S is equal to or less than the first threshold (step S32: YES), the control unit 111 determines that the accumulated registration information is small and ends the process.

  When it is determined that the total value S exceeds the first threshold (step S32: NO), the control unit 111 registers the registration information of the learning table 112a one by one in the power saving table 112b (step S33). Specifically, information on the “day or holiday” column, information on the “time zone” column, and information on the “position” column related to one registration information in the learning table 112a is registered in the power saving table 112b.

  Next, the control unit 111 determines whether or not the frequency relating to the registration information registered in step S33, that is, the value obtained by dividing the frequency stored in the “frequency” column by the total value S is equal to or greater than the second threshold value. (Step S34). The second threshold is 0.08, for example. If it is determined that the value is greater than or equal to the second threshold (step S34: YES), the control unit 111 registers the “normal” mode indicating the type of the power saving mode in the “power saving control” column corresponding to the registration information. (Step S35). When it is determined that it is less than the second threshold (step S34: NO), the control unit 111 sets a “power saving” mode indicating one of the power saving modes in the “power saving control” column corresponding to the registration information. Register (step S36).

  When the process of step S35 or step S36 is completed, the control unit 111 determines whether all registration information of the learning table 112a is registered in the power saving table 112b (step S37). If it is determined that there is unregistered registration information (step S37: NO), the control unit 111 returns the process to step S33. When it is determined that all registration information has been registered in the power saving table 112b (step S37: YES), the control unit 111 ends the process related to the registration of the power saving table 112b.

  In this embodiment, the learning table 112a and the power saving table 112b storing the power saving control contents are individually stored in the storage unit 112. However, the learning table 112a and the power saving table 112b are integrated. The information of each table described above may be registered in one table.

FIG. 7 is a flowchart showing a processing procedure of the control unit 111 related to power saving, and FIG. 8 is a chart showing an example of control contents related to power saving. The control unit 111 executes the following process at the start of parking when the door of the vehicle 100 is locked and at the timing of each time zone. As described above, each time zone is, for example, 0:00, 3:00, 6:00, 9:00, 12:00, 15:00, 18:00, and 21:00.
The control unit 111 acquires position information from the navigation ECU 12 (step S51), and determines whether or not the position indicated by the acquired position information is registered in the learning table 112a (step S52).

  When it determines with the position which concerns on the acquired positional information having been registered into the learning table 112a (step S52: YES), the control part 111 pinpoints the maximum value of the frequency matched with the position which concerns on the acquired positional information. Then, it is determined whether or not the specified maximum frequency is less than the third threshold (step S54). The third threshold is 20, for example.

When it is determined that the maximum frequency is less than the third threshold (step S54: YES), or in step S52, it is determined that the situation indicating the position related to the acquired position information is not registered in the learning table 112a. In the case (step S52: NO), the control unit 111 sets the “normal” mode in each ECU (step S55) and ends the process.
With the above processing, a situation where the vehicle 100 is located in a place where the user does not go much, that is, a place where the door unlocking and locking frequency is low, is specified. In such a situation, priority is given to convenience over power saving. 8 “Normal” mode is set in each ECU as shown in the right column.

When it is determined that the maximum frequency is greater than the third threshold (step S54: NO), the control unit 111 determines whether registration information that matches the time and position such as the current day of the week is registered in the power saving table 112b. Is determined (step S56). When it is determined that there is matching registration information (step S56: YES), the control unit 111 sets the “normal” mode or the “power saving” mode for each ECU according to the power saving table 112b (step S58), and performs processing. Finish. That is, when “normal” is registered in the “power saving control” column of the registration information corresponding to the current situation, the control unit 111 sets the “normal” mode in each ECU, and the “power saving control” column. When “power saving” is registered, the control unit 111 sets the “power saving” mode in each ECU. When it is determined that there is no matching registration information (step S56: NO), the control unit 111 sets the “maximum power saving” mode for each ECU (step S57), and ends the process.
With the above processing, in a situation where the user goes frequently, that is, in a situation where the vehicle 100 is in a place where the door unlocking and locking frequency is high, depending on the operation frequency of the keyless reception ECU 14, the smart transmission / reception ECU 15, or the body ECU 13, As shown in the left column of FIG. 8, “normal” mode, “power saving” mode, and “maximum power saving” mode are set. That is, in a situation where the operation frequency of the keyless reception ECU 14 or the like is high, the vehicle 100 is likely to be used, so the “normal” mode is set and the operation frequency is low or the operation frequency is not registered. Since the possibility of using the vehicle 100 is low, the “power saving” mode or the “maximum power saving” mode is set. In addition, since the place where a user goes frequently is considered the place where the fixed security was confirmed, even if it makes the period which starts each ECU intermittently a long period, there is no problem.

  According to the power saving control system 1 and the power saving control device 11 according to the embodiment configured as described above, the intermittent activation cycle of the in-vehicle electronic device is changed according to the position, time zone, and the like of the parked vehicle 100. Thus, it is possible to perform power saving control of the on-vehicle electronic device during parking while maintaining convenience.

  Further, in the above-described embodiment, the situation indicating the current position is not registered in the learning table 112a, and even if it is registered, the frequency is less than the third threshold, that is, the vehicle 100 is located on unguided land. When the vehicle is parked, each ECU can be operated with priority on convenience.

  Furthermore, taking into account whether the vehicle is parked on a day of the week, whether it is a holiday, etc., it is possible to change the period at which each ECU is intermittently activated during parking, thereby achieving effective power saving while maintaining convenience. Can do.

(Modification 1)
The power saving control system 1 and the power saving control device 11 according to the modified example 1 prioritize convenience when raindrops are detected, and operate each ECU in the “normal” mode regardless of the parking position and the time zone. For example, the control unit 111 acquires a detection result from the raindrop sensor 16a after step S54 in FIG. 7, and determines whether or not a raindrop has been detected. If it is determined that raindrops have been detected, the “normal” mode is set for each ECU, and the process ends. If it is determined that no raindrop has been detected, the processing after step S56 is executed.

  According to the first modification, it is possible to operate each ECU with priority on convenience during rain. For example, the responsiveness of each ECU can be improved, the response speed of each ECU can be improved during rain, and the vehicle 100 can be boarded more quickly.

(Modification 2)
The power saving control system 1 and the power saving control device 11 according to the modification 2 give priority to convenience when the air temperature is lower than a predetermined threshold temperature, and each ECU in the “normal” mode regardless of the parking position and the time zone. To work. For example, the control unit 111 acquires air temperature information from the temperature sensor 16c after step S54 in FIG. 7, and determines whether or not the air temperature is lower than the threshold temperature. If it is determined that the memory is lower than the threshold temperature, the “normal” mode is set in each ECU, and the process is terminated. When it is determined that the air temperature is equal to or higher than the threshold temperature, the processes after step S56 are executed.

  According to the second modification, in a state where it is desired to get on the vehicle 100 quickly such as in cold weather, the ECUs can be operated with priority on convenience. That is, it is possible to improve the responsiveness of each ECU during cold weather and to board the vehicle 100 more quickly.

  In the present embodiment and the modification, the frequency of operation of the keyless reception ECU 14, the smart transmission / reception ECU 15 or the body ECU 13 related to the locking or unlocking of the door is stored, and the intermittent activation cycle of each ECU is based on the frequency. However, the intermittent activation period of each ECU may be selected based on the operation frequency of other ECUs.

  Various ECUs that are intermittently activated are merely examples, and the intermittent activation cycle of any ECU that needs to operate when the vehicle is parked may be changed to realize power saving control.

  In addition, it should be considered that the embodiment disclosed this time is illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Power saving control system 11 Power saving control apparatus 12 Navigation ECU
112a Learning table 112b Power saving table 13 Body ECU
14 Keyless receiving ECU
15 Smart transmission / reception ECU
16 Sensor ECU
16a Raindrop sensor 16b Illuminance sensor 16c Temperature sensor 17 Car-mounted LAN
100 vehicle 111 control unit 112 storage unit 113 RAM
114 Clock unit 115 CAN communication I / F

Claims (9)

In a power saving control system that includes an in-vehicle electronic device that is intermittently activated when the vehicle is stopped, and performs power saving control by changing the activation cycle of the in-vehicle electronic device,
A clock part,
A position detection unit for detecting its own position;
A storage unit that stores a time zone and a position when the in-vehicle electronic device is activated and operated, and a frequency in which the in-vehicle electronic device is operated in the time zone and the position in association with each other,
Based on the time zone, position and frequency stored in the storage unit, the frequency specification for specifying the frequency at which the in-vehicle electronic device has been operated in the past at the time measured by the clock unit and the position detected by the position detection unit And
A power saving control system comprising: a cycle changing unit that changes a cycle in which the in-vehicle electronic device is intermittently activated according to the frequency specified by the frequency specifying unit. The period changing unit is
When the frequency specified by the frequency specifying unit is high, the cycle in which the in-vehicle electronic device is intermittently started is changed to the first cycle, and when the frequency specified by the frequency specifying unit is low, the first The power-saving control system according to claim 1, wherein the power-saving control system is changed to a second period that is lower than the period. A determination unit that determines whether the frequency at which the in-vehicle electronic device has operated in the past at the position detected by the position detection unit is equal to or higher than a predetermined threshold;
The period changing unit is
When the determination unit determines that the frequency is greater than or equal to the threshold value and the frequency specified by the frequency specifying unit is low, the frequency is changed to a second period, and when the determination unit determines that the frequency is less than the threshold value, the frequency The power saving control system according to claim 2, wherein the first period is changed regardless of the frequency specified by the specifying unit. The period changing unit is
When the determination unit determines that the value is equal to or greater than the threshold value and the storage unit does not store the time measured by the clock unit and the position detected by the position detection unit, the in-vehicle electronic device is intermittently The power-saving control system according to claim 3, wherein the cycle to be activated is changed to a cycle shorter than the second cycle. It has a raindrop detector that detects raindrops,
The period changing unit is
When a raindrop is detected by the raindrop detection unit, the period at which the in-vehicle electronic device is intermittently started is changed to a period equal to or greater than the first period, regardless of the frequency specified by the frequency specifying unit. The power saving control system according to any one of claims 2 to 4, wherein the power saving control system is provided. It has a temperature detector that detects the temperature,
The period changing unit is
When the temperature detected by the temperature detection unit is lower than a threshold temperature, a cycle in which the in-vehicle electronic device is intermittently activated is a cycle equal to or higher than the first cycle regardless of the frequency specified by the frequency specification unit. The power saving control system according to any one of claims 2 to 5, wherein the power saving control system is changed to: The in-vehicle electronic device is plural,
The storage unit
Remembers how often one in-vehicle electronic device is activated and
The period changing unit is
The power saving control system according to any one of claims 1 to 6, wherein a cycle in which the plurality of in-vehicle electronic devices are intermittently started is changed. The one in-vehicle electronic device is
The power saving control system according to claim 7, wherein the power saving control system is an ECU that controls locking and unlocking of a vehicle door. In the power saving control device that controls the period when the external device is started intermittently,
A clock part,
A position detection unit for acquiring position information indicating the position of the external device;
A storage unit that associates and stores a time zone and a position when the external device is activated and operated, and a frequency at which the external device operates in the time zone and the position;
Based on the time zone, position, and frequency stored in the storage unit, the frequency measured by the clock unit and the frequency at which the external device has operated in the past at the position indicated by the position information acquired by the position detection unit are specified. A frequency identification unit,
A power saving control device comprising: a cycle changing unit that changes a cycle in which the external device is intermittently activated according to the frequency specified by the frequency specifying unit.

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