JP4853703B2 - Instrument device - Google Patents

Description

  The present invention relates to an instrument device mounted on a vehicle, and more particularly to an instrument device provided with a clock device that receives a standard radio wave including time information and corrects the time.

Conventionally, there is a clock device that receives a standard radio wave including time information and corrects the time, and such a clock device generally receives the standard radio wave automatically at a predetermined time and adjusts the time. Met. In Patent Document 1, radio waves are automatically received twice at 2 am and 4 am to correct the time. When such a timepiece device is mounted on a vehicle, reception of standard radio waves is hindered by the influence of engine noise during travel, and a phenomenon occurs in which time information cannot be obtained. As a solution to this problem, Patent Document 2 discloses that a standard radio wave is received immediately after the engine is stopped.
JP 09-043369 A Japanese Patent Laid-Open No. 14-014183

  According to Patent Document 2, it is possible to receive standard radio waves without being affected by engine noise of the user's vehicle. However, in recent instrument devices, the microcomputer as a control means of the instrument device enters a standby state after a certain period of time after the engine (prime motor) is stopped (after the ignition is turned off). With the operation of the control means before entering the standby state, noise may be generated from the control means, which may cause a phenomenon that reception of the standard radio wave is hindered and it is difficult to receive the standard radio wave.

  Therefore, the present invention pays attention to the above-mentioned problems, suppresses the influence of noise caused by the operation before the standby state of the control means of the instrument device after stopping the prime mover, can receive the standard radio wave well, and correct the time. A possible instrument device is provided.

  In order to solve the above problems, the present invention controls a display unit that displays a vehicle state, a vehicle state detection signal, and controls the display unit, as in the instrument device according to claim 1. A control unit that receives a prime mover stop signal and enters a standby state after a certain time, a display unit that notifies time, a reception unit that receives a standard radio wave including time information, and a counter that counts a reference clock signal to determine the time. And a clock control means for correcting the time based on time information received via the receiving means, wherein the control means transmits the standard radio wave during the standby state. When the prime mover stop signal is received so as to be received, a signal for operating the receiving means is transmitted to the timepiece control means after a predetermined time has elapsed.

  Further, as in the instrument device according to claim 2, when the control unit receives the vehicle state detection signal when the motor of the vehicle is in a stopped state, the control unit may be counting time for a predetermined time. For example, after stopping the timing and counting again for a predetermined time, the clock control means transmits a signal for operating the receiving means to receive the standard radio wave including the time information.

  Further, as in the instrument device according to claim 3, a display unit that displays a vehicle state, and a control unit that receives the vehicle state detection signal and controls the display unit, and waits for a certain time after receiving the prime mover stop signal of the vehicle A control means for entering a state, a display for notifying the time, a receiving means for receiving a standard radio wave including time information, a reference clock signal is counted to determine the time, an output instruction is given to the display, and the receiving means A timepiece control means for correcting the time based on the time information received via the timepiece, and when the control means receives the prime mover stop signal, the timepiece control means performs time correction processing. When the signal for performing the time adjustment processing is received from the control means so that the clock control means receives the standard radio wave during the standby state, It is intended to operate the receiving means.

  Further, as in the instrument device according to claim 4, when the control unit receives the vehicle state detection signal when the prime mover of the vehicle is stopped, the control unit immediately controls the timepiece control unit. When the control means receives the vehicle state detection signal, the timepiece control means stops counting the time if it is timed for a predetermined time. The receiving means is operated to receive the standard radio wave including the time information after measuring the time.

  Further, as in the instrument device according to claim 5, the vehicle state detection signal is a signal displayed on the display unit via the control means even when the motor of the vehicle receives a stop signal.

  Further, as in the instrument device according to claim 5, the vehicle state detection signal is a signal that detects opening and closing of the door of the vehicle.

  It is an object of the present invention to provide an instrument device capable of suppressing the influence of noise associated with the operation before the standby state of the control means of the instrument device after stopping the prime mover, receiving a standard radio wave, and correcting the time. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram of the instrument device 100. The instrument device 100 receives a standard radio wave from a control unit 101 composed of a microcomputer that controls the instrument device 100 (performs processing operations described later), a clock control unit 101a composed of a microcomputer that controls the clock, and the like. Antenna 102, receiving means 103, vehicle interface terminals 109a to 109d, vehicle interface means 108, a liquid crystal display element or an organic EL display element for displaying time, integrated distance (odd, trip), etc. A digital display 105, various analog instruments 106, various warning display sections 113a to 113c, a gear shift display section 114 for displaying the shift position of the vehicle transmission, the display 105, various analog instruments 106, and various warnings. Driving hand for driving the display units 113a to 113c 104, a storage unit 107 for storing each time when the standard radio wave is received by the clock control unit 101a, and a crystal unit 112 for generating a reference clock signal for the control unit 101 and the clock control unit 101a. Composed.

  The vehicle interface terminals 109a to 109d have respective signal lines so that a prime mover drive on / off signal (ignition on / off signal), an instruction signal from the operation means, other vehicle information (plural), and multiplex communication can be input / output. Is connected. A battery and GND are connected to the vehicle interface terminals 109e and 109f. The battery and the GND are connected to the power supply means 110 and supply a predetermined voltage into the instrument device 100. The reset means 111 outputs a reset signal when the battery shifts from the non-contact state to the contact state. appear.

  In the present embodiment, each of the various warning display units 113a to 113c includes a door warning display unit 113a, a seat belt warning display unit 113b, and a parking brake warning display unit 113c. Each of the warning display portions 113a to 113c is driven by the control means 101 via the drive means 104 based on the vehicle information from the vehicle information terminal 109c or the multiplex communication input / output terminal 109d. In particular, regarding the door warning display portion 113a, even when the vehicle is in an ignition-off state and the control means 101 is in a standby state (sleep state), a signal that detects the opening / closing of the door (in this case, the door is open) is received by the control means 101. When detected, the control means 101 changes from the sleep state to the normal operation state, and controls and displays the door warning display unit 113a.

  Next, the processing operation of the instrument device 100 will be described in detail with reference to FIGS. The timepiece control means 101 a counts the reference clock signal emitted from the crystal unit 112 to obtain the time, and displays the time on the display 105 via the control means 101 and the drive means 104. When it is determined that the regular time information has been received, the clock control unit 101a corrects the time based on the received time information. In determining whether or not the time information is correct, the clock control unit 101a does not generate an error in the parity check of the received time information and continues after 1 minute (the time information is one cycle 60 seconds). When the time information obtained in this way can be received twice, it is determined that the regular time information has been received.

  Processing of the instrument device of the present embodiment will be described with reference to FIGS.

  As shown in FIG. 3, when the vehicle ignition is switched from a high signal to a low signal, the ignition is turned off (prime motor stop signal), and the control means 101 changes from a normal state to a standby state after a predetermined time T, and the control means 101 The noise generated from the is reduced. Then, immediately before the control unit 101 enters a standby state (after a predetermined time t has elapsed since the ignition off signal was received), the control unit 101 causes the clock control unit 101a to receive a standard radio wave including time information. Therefore, a signal for operating the receiving means 103 is transmitted. Then, the clock control means 101a drives the receiving means 103 to receive the standard radio wave and correct the time. For the most part during the reception, the control means 101 is in a standby state, so that the influence of noise generated from the control means 101 can be suppressed, the standard radio wave can be received well, and the time can be corrected. Since the timepiece control means 101 a is smaller in scale than the control means 101, the noise generated by the timepiece control means 101 a is less likely to affect the control means 101.

  Further, as shown in FIG. 3, when the vehicle door is opened after a while, the control means 101 returns from the standby state to the normal state in order to control and drive the door warning display portion 113a of the instrument device 100. Then, when the door is closed and a predetermined time T has elapsed, the control means 101 changes from the normal state to the standby state again. Just before the control means 101 enters the standby state, the control means 101 similarly sends the time to the timepiece control means 101a. A signal for operating the receiving means 103 is transmitted to receive a standard radio wave including information, and the time is corrected.

  This operation will be described with reference to FIG. 2 for the processing of the instrument device 100 of the present embodiment.

  FIG. 2 is a flowchart showing the processing of the control device 101. In step S1, it is determined whether the ignition of the vehicle is off (the prime mover is stopped). If No, the process returns to Step S1 again. If the ignition is off, the answer is Yes, and the process proceeds to the next Step S2.

  In step S2, a counter (not shown) provided in the control means 101 is reset to 0, the process proceeds to the next step S3, 1 is added to the counter, and the process proceeds to the next step S4.

  In step S4, the presence / absence of a vehicle state detection signal such as a door opening / closing signal that detects opening / closing of the door of the vehicle is determined. At this time, for example, when a signal that detects that the door is opened is detected, the control unit 101 returns from the standby state to the normal state, and noise is generated, so the process returns to step S1.

  Note that, as long as the vehicle is in the ignition-off state and the door is open, a signal for opening the door is detected in step S4. Therefore, steps S1, S2, S3, and S4 are repeatedly processed.

  If the vehicle is in the ignition-off state and the door is closed, the signal for detecting the opening of the vehicle door is not detected in step S4, and the process proceeds to step S5.

  In step S5, it is determined whether or not the predetermined time t has been measured. If the value counted by the counter is not equal to or greater than the predetermined value, the predetermined time has not elapsed and the process returns to step S3. If the counter value is equal to or larger than the predetermined value in step S5, the process proceeds to step S6 to transmit a signal for starting the reception of the standard radio wave to the timepiece control means 101a to the timepiece control means 101a, and for the timepiece control means 101a. Will correct the time.

  In step S7, the control means 101 is changed from the normal state to the standby state, and the process ends. The clock control means 101a has already started receiving standard radio waves before the control means 101 enters a standby state, but it takes at least a few minutes to receive the radio waves and correct the time. Therefore, reception of radio waves is not affected.

  In the present embodiment, the control unit 101 performs most of the processing, and the clock control unit 101a only receives the standard radio wave and corrects the time associated with the reception, but is not limited to the above embodiment. For example, as shown in FIGS. 4 and 5, most processing may be performed by the clock control means 101a. The process will be described below.

  4 is a flowchart showing the processing of the control means 101, and FIG. 5 is a flowchart showing the processing of the clock control means 101a.

  First of all, it starts from the processing of the control means 101 of FIG. In step S11, it is determined whether the ignition of the vehicle is off. If No, the process returns to step sS11 again. If the ignition is off, the answer is Yes and the process proceeds to the next step S12.

  In step S12, a signal for causing the timepiece control means 101a to perform time correction processing is transmitted to the timepiece control means 101a. In step S13, the control unit 101 changes from the normal state to the standby state, and the process of the control unit 101 ends. Note that it is not necessary to immediately enter the standby state in step S13, and may enter the standby state after a certain time T has elapsed. Also in this case, the watch control unit 101a is in a standby state immediately after or before reception.

  Next, in the processing of the clock control means 101a shown in FIG. 5, the presence / absence of a processing start signal from the control means 101 is monitored in step S14. If a signal is received, it will progress to step S15.

  In step S15, a counter (not shown) provided in the clock control unit 101a is reset to 0, the process proceeds to the next step S16, 1 is added to the counter, and the process proceeds to the next step S17.

  In step S17, the presence or absence of a vehicle state detection signal such as a signal that detects opening / closing of the vehicle door is determined via the control means 101. At this time, for example, when a signal that detects that the door is opened is detected, the control unit 101 returns from the standby state to the normal state, and noise is generated, so the process proceeds to step S20.

  In step S20, when the vehicle state detection signal is an ignition switch on signal, all processing is completed. If the signal is not an ignition switch ON signal, the process returns to step S15 again.

  Note that, as long as the vehicle is in the ignition-off state and the door is open, the door open signal is detected in step S17, so that steps S15, S16, S17, and S20 are repeatedly processed.

  If the vehicle is in the ignition-off state and the door is closed, the signal for detecting the opening of the vehicle door is not detected in step S17, and the process proceeds to step S18. If the value counted by the counter is not equal to or greater than the predetermined value, the predetermined time t has not elapsed and the process returns to step S16. If the counter value is equal to or larger than the predetermined value in step S18, the process proceeds to step S19, the reception of the standard radio wave is started, the time is corrected, and the process is terminated.

  With the above configuration, it is possible to provide an instrument device capable of suppressing the influence of noise associated with the operation of the control means of the instrument device 100 after the ignition is turned off, receiving a standard radio wave satisfactorily, and correcting the time.

  In each of the above embodiments, as a signal for displaying the display units 106, 113a to 113c, 114 via the control means 101 even when the vehicle is in the ignition off state, a signal that detects opening / closing of the door is taken as an example. However, the present invention is not limited to the above embodiment. For example, in the case where the instrument device is always illuminated when the ignition is on, the headlamp can be used to check whether the vehicle headlamp is lit. The warning display unit is provided in the instrument device, and there is a signal for detecting whether or not the headlamp is turned on.

The block diagram which shows the instrument apparatus of embodiment of this invention. The flowchart figure explaining operation | movement of the instrument device. The figure explaining operation | movement of the instrument device. The flowchart figure explaining another operation | movement of the instrument apparatus. The flowchart figure explaining another operation | movement of the instrument apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Instrument apparatus 101 Control means 101a Clock control means 102 Antenna 103 Receiving means 105 Display 106 Analog instrument 107 Storage means 109a-109d Vehicle interface terminal 112 Crystal oscillator 113a-113c Warning display part 114 Gear shift display part

Claims (6)

A display unit that displays a vehicle state; a control unit that receives the vehicle state detection signal to control the display unit and receives a prime mover stop signal of the vehicle; Receiving means for receiving a standard radio wave including time information; obtaining a time by counting a reference clock signal; giving an output instruction to the display; and correcting the time based on time information received via the receiving means A timepiece control means for receiving the prime mover stop signal so that the control means receives the standard radio wave during the standby state, and the timepiece control means receives the signal after a predetermined time has elapsed. An instrument device for transmitting a signal for operating the means. When the motor is stopped, when the control means receives the vehicle state detection signal, if the control means is counting a predetermined time, the timing is stopped and the time is again measured after a predetermined time. 2. The instrument device according to claim 1, wherein a signal for operating the receiving unit is transmitted so that the control unit receives a standard radio wave including the time information. A display unit that displays a vehicle state; a control unit that receives a vehicle state detection signal to control the display unit and receives a prime mover stop signal of the vehicle; and a standby state after a predetermined time; a display unit that notifies the time; Receiving means for receiving a standard radio wave including time information, and calculating a time based on time information received through the receiving means by counting the reference clock signal to obtain the time and instructing the output to the display An instrument device comprising a clock control means, wherein when the control means receives the prime mover stop signal, the clock control means transmits a signal for performing time correction processing to the clock control means, and the clock control means When receiving a signal for performing the time adjustment processing from the control means so as to receive the standard radio wave during a state, the receiving means is operated after a predetermined time is counted. Meter apparatus. When the motor of the vehicle is in a stopped state, when the control means receives the vehicle state detection signal, the control means immediately transmits to the clock control means that the vehicle state detection signal has been received, When it is determined that the control means has received the vehicle state detection signal, the timepiece control means stops the timekeeping if a predetermined time is being measured, and receives the standard radio wave including the time information after measuring the predetermined time again. 4. The instrument device according to claim 3, wherein the receiving means is operated. 5. The instrument device according to claim 2, wherein the vehicle state detection signal is a signal displayed on the display unit via the control means even when the motor of the vehicle receives a stop signal. 5. The instrument device according to claim 2, wherein the vehicle state detection signal is a signal that detects opening / closing of the door of the vehicle.

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