WO2020050323A1 - Vehicle instrument - Google Patents

Vehicle instrument Download PDF

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Publication number
WO2020050323A1
WO2020050323A1 PCT/JP2019/034813 JP2019034813W WO2020050323A1 WO 2020050323 A1 WO2020050323 A1 WO 2020050323A1 JP 2019034813 W JP2019034813 W JP 2019034813W WO 2020050323 A1 WO2020050323 A1 WO 2020050323A1
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Prior art keywords
state
operation switch
switch group
vehicle instrument
pulse width
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PCT/JP2019/034813
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French (fr)
Japanese (ja)
Inventor
真 小黒
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日本精機株式会社
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Priority to JP2020541272A priority Critical patent/JP7355022B2/en
Publication of WO2020050323A1 publication Critical patent/WO2020050323A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • G08C15/06—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division
    • G08C15/12—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division the signals being represented by pulse characteristics in transmission link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems

Definitions

  • the present invention relates to a vehicle instrument for gatewaying the state of an operation switch to an external device.
  • Patent Document 1 discloses that the state of a steering switch of a vehicle is shared by a vehicle-mounted audio system and a vehicle instrument via a CAN (controller area network).
  • Patent Literature 1 since the state of the steering switch is shared by a plurality of devices, each device must have a communication means incorporating a CAN protocol, and the configuration is complicated and expensive. would.
  • the vehicle instrument 1 of the present disclosure includes: An input unit 111 for inputting a state of the operation switch group SW; An output unit that outputs a pulse width modulation signal PWM having a waveform corresponding to a state of the operation switch group SW input from the input unit 111; With.
  • the state of the operation switch can be gatewayed to an external device with a simple configuration.
  • FIG. 1 is a front view of a vehicle instrument according to the present disclosure.
  • 1 is a system block diagram of a vehicle instrument according to the present disclosure. The figure which shows the correspondence of the switch state value of the instrument for vehicles of this indication, and the operation state of each switch. The figure which shows the correspondence of the switch state value of the meter for vehicles of this indication, and the duty ratio of a pulse width modulation signal. The figure which shows the correspondence of the switch state value and each switch state in the modification of the instrument for vehicles of this indication.
  • the vehicle instrument 1 is an instrument having a display unit 10 that displays vehicle information such as a running speed of a vehicle and an engine speed by a scale and a pointer.
  • the vehicle instrument 1 is electrically connected to the operation switch group SW and the external device EXT, and has a gateway function of outputting the state of the operation switch group SW to the external device EXT.
  • the vehicle instrument 1 has a control unit 11 that controls the display unit 10.
  • the control unit 11 has an input unit 111, a conversion unit 112, and an output unit 113.
  • the operation switch group SW includes operation switches SW1, SW2, and SW3.
  • the operation switch SW1 is a display switching operation switch.
  • the operation switch SW2 is a decision operation switch.
  • the operation switch SW3 is a cancel operation switch.
  • the control unit 11 is, for example, a microcontroller (integrated control circuit) having a CPU, a volatile memory RAM, and a nonvolatile memory (storage unit) ROM.
  • the control unit 11 causes the display unit 10 to display vehicle information input from the in-vehicle network LAN.
  • the in-vehicle network LAN is, for example, a CAN (controller area network), and the control unit 11 includes a CAN controller for communicating using a CAN protocol.
  • the control unit 11 has a gateway function of outputting the operation state of the operation switch group SW to the external device EXT.
  • This gateway function is realized by the input unit 111, the conversion unit 112, and the output unit 113.
  • the input unit 111 detects the operation state of the operation switch group SW, and outputs the detected operation state to the conversion unit 112.
  • the conversion unit 112 is input from the input unit 111 based on a conversion table that associates a combination of operation states of the operation switch group SW stored in the nonvolatile memory ROM in advance and a switch state value SV corresponding to the combination. It is converted into a switch state value SV representing the operation state of the operation switch group SW.
  • the switch state value SV is a numerical value (or a sign) representing a combination of operation states of the operation switch group SW.
  • one of eight non-overlapping combinations of three operation switches SW1 to SW3 having two states is assigned a unique numerical value from 0 (000b) to 7 (111b).
  • the switch state value SV is defined such that a combination having a higher appearance frequency has a lower numerical value, and a combination having a lower appearance frequency has a higher numerical value. More specifically, in the frequency of appearance of the operation state of the operation switch group SW, the OFF state is higher in appearance frequency than the ON state, so that the combination including the OFF state has a lower numerical value than the combination including the ON state. Have been. In addition, since a combination in which one of the operation switch groups SW is in the ON state has a higher appearance frequency than a combination in which a plurality of operation switches are simultaneously in the ON state, the switch state value SV becomes smaller as the number of ON states becomes smaller. Have been.
  • the output unit 113 outputs the waveform of the pulse width modulation signal PWM having the duty ratio according to the switch state value SV to the external device EXT.
  • the duty ratio in the present disclosure indicates a ratio of a time during which a Hi signal is output during one cycle period (a so-called ON-duty ratio). That is, the higher the duty ratio is, the larger the total power output per cycle is, and the lower the duty ratio is, the smaller the total power is per cycle.
  • FIG. 4 shows the correspondence between the switch state value SV and the duty ratio of the pulse width modulation signal PWM.
  • the output unit 113 outputs a pulse width modulation signal PWM by setting a value obtained by dividing the switch state value SV by the maximum value of the switch state value SV and multiplying by 100 as a duty ratio.
  • the switch state value SV when the switch state value SV is 0 (000b), the duty ratio is 0%, and when the switch state value SV is 1 (001b), the duty ratio is 14.3 (Th1)%, and the switch state value SV is When the duty ratio is 2 (010b), the duty ratio is 28.6 (Th2)%, and when the switch state value SV is 3 (011b), the duty ratio is 42.9 (Th3)%, and the switch state value SV is 4 (100b).
  • the duty ratio is 57.1 (Th4)%, when the switch state value is 5 (101b), the duty ratio is 71.4 (Th5)%, and when the switch state value is 6 (110b), the duty ratio is When the switch state value is 85.7 (Th6)% and the switch state value is 7 (111b), the duty ratio is set as 100%.
  • the output unit 113 outputs the pulse width modulation signal PWM having a lower duty ratio as the frequency of the combination of the operation states of the operation switch group SW increases, and the output frequency as the frequency of the combination of the operation states of the operation switch group SW decreases.
  • the pulse width modulation signal PWM having a high duty ratio is output.
  • the state of the operation switch group SW can be output to the external device EXT with the pulse width modulation signal PWM with less power consumption.
  • the vehicle instrument 1 of the present disclosure is configured to output the state of the operation switch group SW to the external device EXT using the pulse width modulation signal PWM.
  • the external device EXT can know the state of the operation switch group SW from the vehicle instrument 1 only by a change in the voltage value.
  • the vehicle instrument 1 of the present disclosure may be modified as follows.
  • the operation state of the operation switch group SW detected by the input unit 111 may include a failure state (Failed state) in addition to the OFF state / ON state.
  • the switch state value SV is, as shown in FIG. 5, a unique one of 27 non-overlapping combinations of three operation switches SW1 to SW3 having three states (OFF state / ON state / Failed state). It can be represented by numerical values 0 (00000b) to 26 (11010b).
  • the frequency of occurrence of the failure state is lower than that of the OFF state or the ON state, so that the combination including the failure state has a higher value of the switch state value SV than the combination not including the failure state.
  • the switch state value SV is defined so as to increase as the number of failure states increases.
  • the switch state value SV is preferably defined from the viewpoint of power saving by defining the switch state value to be lower as the use frequency of the switch type of the operation switch group is higher.
  • the output unit 113 may vary the output waveform by various pulse modulation methods according to the value of the switch state value SV.
  • the switch state value SV is distinguished by the density or the sign of the pulse density modulation (PDM) signal
  • the pulse position is distinguished by the pulse position of the pulse position modulation (PPM) signal
  • the sampled signal is sampled by the pulse code modulation (PCM) signal. May be configured so as to be distinguished based on the signal.
  • the conversion table that associates the combination of the operation states of the operation switch group SW stored in the nonvolatile memory ROM and the switch state value SV corresponding to the combination may be configured to be replaceable via the in-house network LAN. .

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  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • General Physics & Mathematics (AREA)
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Abstract

The present invention gateways the states of operation switches to an external device with a simple configuration. The vehicle instrument (1) according to the present disclosure comprises: an input unit (111) that receives the state of an operation switch group (SW); a conversion unit (112) that converts the state of the operation switch group (SW) input from the input unit (111) into one value (SV); and an output unit (113) that outputs a pulse width modulation signal (PWM) of a waveform corresponding to the value (SV). This vehicle instrument (1) is configured so as to output the state of the operation switch group (SW) to an external device (EXT) using the pulse width modulation signal (PWM) and is capable of gatewaying the state of the operation switch group (SW) to the external device (EXT) with a simple configuration.

Description

車両用計器Vehicle instrument
　本発明は、操作スイッチの状態を外部機器にゲートウェイする車両用計器に関する。 The present invention relates to a vehicle instrument for gatewaying the state of an operation switch to an external device.
　特許文献１には、車両のステアリングスイッチの状態をＣＡＮ（コントローラエリアネットワーク）を介して、車載オーディオ及び車両用計器が共有している。 Patent Document 1 discloses that the state of a steering switch of a vehicle is shared by a vehicle-mounted audio system and a vehicle instrument via a CAN (controller area network).
特開２０１５－１５１５号公報JP-A-2015-1515
　しかしながら、特許文献１の構成においては、ステアリングスイッチの状態を複数の機器が共有するために、各々の機器がそれぞれＣＡＮプロトコルを組み込んだ通信手段を持たなければならず、構成が煩雑で高価となってしまう。 However, in the configuration of Patent Literature 1, since the state of the steering switch is shared by a plurality of devices, each device must have a communication means incorporating a CAN protocol, and the configuration is complicated and expensive. Would.
　本開示は、上述した課題に鑑みて、簡易な構成で操作スイッチの状態を外部機器にゲートウェイする車両用計器を提供することを目的とする。 In view of the above-described problems, it is an object of the present disclosure to provide a vehicle instrument that has a simple configuration and gateways the state of an operation switch to an external device.
　本開示の車両用計器１は、
　操作スイッチ群ＳＷの状態を入力する入力部１１１と、
　前記入力部１１１から入力された前記操作スイッチ群ＳＷの状態に対応する波形のパルス幅変調信号ＰＷＭを出力する出力部と、
　を備えた。 The vehicle instrument 1 of the present disclosure includes:
An input unit 111 for inputting a state of the operation switch group SW;
An output unit that outputs a pulse width modulation signal PWM having a waveform corresponding to a state of the operation switch group SW input from the input unit 111;
With.
　本開示によれば、簡易な構成で操作スイッチの状態を外部機器にゲートウェイできる。 According to the present disclosure, the state of the operation switch can be gatewayed to an external device with a simple configuration.
本開示の車両用計器の正面図。FIG. 1 is a front view of a vehicle instrument according to the present disclosure. 本開示の車両用計器のシステムブロック図。1 is a system block diagram of a vehicle instrument according to the present disclosure. 本開示の車両用計器のスイッチ状態値と各スイッチの操作状態との対応関係を示す図。The figure which shows the correspondence of the switch state value of the instrument for vehicles of this indication, and the operation state of each switch. 本開示の車両用計器のスイッチ状態値とパルス幅変調信号のＤｕｔｙ比との対応関係を示す図。The figure which shows the correspondence of the switch state value of the meter for vehicles of this indication, and the duty ratio of a pulse width modulation signal. 本開示の車両用計器の変形例におけるスイッチ状態値と各スイッチ状態との対応関係を示す図。The figure which shows the correspondence of the switch state value and each switch state in the modification of the instrument for vehicles of this indication.
　本開示の車両用計器を添付図面を参照して説明する。 車 両 A vehicle instrument according to the present disclosure will be described with reference to the accompanying drawings.
　図１を参照する。車両用計器１は、車両の走行速度やエンジン回転数などの車両情報を目盛と指針によって表示する表示部１０を有する計器である。車両用計器１は、操作スイッチ群ＳＷと外部機器ＥＸＴと電気的に接続しており、操作スイッチ群ＳＷの状態を外部機器ＥＸＴに出力するゲートウェイ機能を有する。 Refer to FIG. The vehicle instrument 1 is an instrument having a display unit 10 that displays vehicle information such as a running speed of a vehicle and an engine speed by a scale and a pointer. The vehicle instrument 1 is electrically connected to the operation switch group SW and the external device EXT, and has a gateway function of outputting the state of the operation switch group SW to the external device EXT.
　図２を参照する。車両用計器１は、表示部１０を制御する制御部１１を有する。制御部１１は、入力部１１１、変換部１１２、出力部１１３を有する。 Refer to FIG. The vehicle instrument 1 has a control unit 11 that controls the display unit 10. The control unit 11 has an input unit 111, a conversion unit 112, and an output unit 113.
　操作スイッチ群ＳＷは、操作スイッチＳＷ１，ＳＷ２，ＳＷ３から構成される。操作スイッチＳＷ１は、表示切替操作スイッチである。操作スイッチＳＷ２は、決定操作スイッチである。操作スイッチＳＷ３は、キャンセル操作スイッチである。 The operation switch group SW includes operation switches SW1, SW2, and SW3. The operation switch SW1 is a display switching operation switch. The operation switch SW2 is a decision operation switch. The operation switch SW3 is a cancel operation switch.
　制御部１１は、例えば、ＣＰＵと揮発性メモリＲＡＭと不揮発性メモリ（記憶部）ＲＯＭを有するマイクロコントローラ（集積制御回路）である。制御部１１は、車内ネットワークＬＡＮから入力された車両情報を表示部１０に表示させる。車内ネットワークＬＡＮは、例えば、ＣＡＮ（コントローラエリアネットワーク）であり、制御部１１は、ＣＡＮプロトコルで通信するためのＣＡＮコントローラを備えている。 The control unit 11 is, for example, a microcontroller (integrated control circuit) having a CPU, a volatile memory RAM, and a nonvolatile memory (storage unit) ROM. The control unit 11 causes the display unit 10 to display vehicle information input from the in-vehicle network LAN. The in-vehicle network LAN is, for example, a CAN (controller area network), and the control unit 11 includes a CAN controller for communicating using a CAN protocol.
　また、制御部１１は、操作スイッチ群ＳＷの操作状態を外部機器ＥＸＴに出力するゲートウェイ機能を有する。このゲートウェイ機能は、入力部１１１、変換部１１２、出力部１１３により実現される。 The control unit 11 has a gateway function of outputting the operation state of the operation switch group SW to the external device EXT. This gateway function is realized by the input unit 111, the conversion unit 112, and the output unit 113.
　入力部１１１は、操作スイッチ群ＳＷの操作状態を検出し、この検出した操作状態を変換部１１２に出力する。 The input unit 111 detects the operation state of the operation switch group SW, and outputs the detected operation state to the conversion unit 112.
　変換部１１２は、不揮発性メモリＲＯＭに予め記憶されている操作スイッチ群ＳＷの操作状態の組み合わせと、その組み合わせに対応するスイッチ状態値ＳＶを対応付ける変換テーブルに基づいて、入力部１１１から入力された操作スイッチ群ＳＷの操作状態を表すスイッチ状態値ＳＶに変換する。 The conversion unit 112 is input from the input unit 111 based on a conversion table that associates a combination of operation states of the operation switch group SW stored in the nonvolatile memory ROM in advance and a switch state value SV corresponding to the combination. It is converted into a switch state value SV representing the operation state of the operation switch group SW.
　スイッチ状態値ＳＶは、操作スイッチ群ＳＷの操作状態の組み合わせを表す数値（あるいは、符号）である。 The switch state value SV is a numerical value (or a sign) representing a combination of operation states of the operation switch group SW.
　具体的には、図３に示すように、２状態（ＯＦＦ状態／ＯＮ状態）を持つ３つの操作スイッチＳＷ１～ＳＷ３の重複のない８つの組み合わせの何れかを一意な数値０（０００ｂ）～７（１１１ｂ）で表したものである。 Specifically, as shown in FIG. 3, one of eight non-overlapping combinations of three operation switches SW1 to SW3 having two states (OFF state / ON state) is assigned a unique numerical value from 0 (000b) to 7 (111b).
　スイッチ状態値ＳＶは、出現頻度が高い組み合わせほど数値が低く、出現頻度が低い組み合わせほど数値が高くなるように定義されている。具体的には、操作スイッチ群ＳＷの操作状態の出現頻度では、ＯＦＦ状態がＯＮ状態よりも出現頻度が高いため、ＯＦＦ状態を含む組み合わせがＯＮ状態を含む組み合わせよりも数値が低くなるように定義されている。また、操作スイッチ群ＳＷのうち１つがＯＮ状態となる組み合わせが、同時に複数がＯＮ状態である組み合わせよりも出現頻度が高いため、ＯＮ状態の数が少ないほどスイッチ状態値ＳＶが小さくなるように定義されている。 The switch state value SV is defined such that a combination having a higher appearance frequency has a lower numerical value, and a combination having a lower appearance frequency has a higher numerical value. More specifically, in the frequency of appearance of the operation state of the operation switch group SW, the OFF state is higher in appearance frequency than the ON state, so that the combination including the OFF state has a lower numerical value than the combination including the ON state. Have been. In addition, since a combination in which one of the operation switch groups SW is in the ON state has a higher appearance frequency than a combination in which a plurality of operation switches are simultaneously in the ON state, the switch state value SV becomes smaller as the number of ON states becomes smaller. Have been.
　出力部１１３は、スイッチ状態値ＳＶに応じたＤｕｔｙ比のパルス幅変調信号ＰＷＭの波形を外部機器ＥＸＴに出力する。本開示におけるＤｕｔｙ比とは、１周期の期間におけるＨｉ信号を出力している時間の比率（所謂、ＯＮ-Ｄｕｔｙ比）を表す。つまり、Ｄｕｔｙ比が高いほど出力される１周期当たりの合計電力が大きく、Ｄｕｔｙ比が低いほど１周期当たり合計電力が小さくなる。 (4) The output unit 113 outputs the waveform of the pulse width modulation signal PWM having the duty ratio according to the switch state value SV to the external device EXT. The duty ratio in the present disclosure indicates a ratio of a time during which a Hi signal is output during one cycle period (a so-called ON-duty ratio). That is, the higher the duty ratio is, the larger the total power output per cycle is, and the lower the duty ratio is, the smaller the total power is per cycle.
　図４にスイッチ状態値ＳＶとパルス幅変調信号ＰＷＭのＤｕｔｙ比との対応関係を示す。出力部１１３は、スイッチ状態値ＳＶをスイッチ状態値ＳＶの最大値で割った値を１００に乗じた値をＤｕｔｙ比として設定してパルス幅変調信号ＰＷＭを出力する。 FIG. 4 shows the correspondence between the switch state value SV and the duty ratio of the pulse width modulation signal PWM. The output unit 113 outputs a pulse width modulation signal PWM by setting a value obtained by dividing the switch state value SV by the maximum value of the switch state value SV and multiplying by 100 as a duty ratio.
　具体的には、スイッチ状態値ＳＶが０（０００ｂ）のときはＤｕｔｙ比０％、スイッチ状態値ＳＶが１（００１ｂ）のときはＤｕｔｙ比が１４．３（Ｔｈ１）％、スイッチ状態値ＳＶが２（０１０ｂ）のときはＤｕｔｙ比が２８．６（Ｔｈ２）％、スイッチ状態値ＳＶが３（０１１ｂ）のときはＤｕｔｙ比が４２．９（Ｔｈ３）％、スイッチ状態値ＳＶが４（１００ｂ）のときはＤｕｔｙ比が５７．１（Ｔｈ４）％、スイッチ状態値が５（１０１ｂ）のときはＤｕｔｙ比が７１．４（Ｔｈ５）％、スイッチ状態値が６（１１０ｂ）のときはＤｕｔｙ比が８５．７（Ｔｈ６）％、スイッチ状態値が７（１１１ｂ）のときはＤｕｔｙ比が１００％として設定する。 Specifically, when the switch state value SV is 0 (000b), the duty ratio is 0%, and when the switch state value SV is 1 (001b), the duty ratio is 14.3 (Th1)%, and the switch state value SV is When the duty ratio is 2 (010b), the duty ratio is 28.6 (Th2)%, and when the switch state value SV is 3 (011b), the duty ratio is 42.9 (Th3)%, and the switch state value SV is 4 (100b). , The duty ratio is 57.1 (Th4)%, when the switch state value is 5 (101b), the duty ratio is 71.4 (Th5)%, and when the switch state value is 6 (110b), the duty ratio is When the switch state value is 85.7 (Th6)% and the switch state value is 7 (111b), the duty ratio is set as 100%.
　出力部１１３は、操作スイッチ群ＳＷの操作状態の組み合わせの出現頻度が高い組み合わせほど低いＤｕｔｙ比のパルス幅変調信号ＰＷＭを出力し、操作スイッチ群ＳＷの操作状態の組み合わせの出現頻度が低い組み合わせほど高いＤｕｔｙ比のパルス幅変調信号ＰＷＭを出力している。これにより、より少ない消費電力で操作スイッチ群ＳＷの状態をパルス幅変調信号ＰＷＭで外部機器ＥＸＴに出力できる。 The output unit 113 outputs the pulse width modulation signal PWM having a lower duty ratio as the frequency of the combination of the operation states of the operation switch group SW increases, and the output frequency as the frequency of the combination of the operation states of the operation switch group SW decreases. The pulse width modulation signal PWM having a high duty ratio is output. Thus, the state of the operation switch group SW can be output to the external device EXT with the pulse width modulation signal PWM with less power consumption.
　以上のように、本開示の車両用計器１は、操作スイッチ群ＳＷの状態をパルス幅変調信号ＰＷＭで外部機器ＥＸＴに出力するように構成している。このように構成することで、外部機器ＥＸＴは、車両用計器１から操作スイッチ群ＳＷの状態を電圧値の変化のみで知ることができる。 As described above, the vehicle instrument 1 of the present disclosure is configured to output the state of the operation switch group SW to the external device EXT using the pulse width modulation signal PWM. With this configuration, the external device EXT can know the state of the operation switch group SW from the vehicle instrument 1 only by a change in the voltage value.
　本開示の車両用計器１は、以下のような変形をしても良い。 車 両 The vehicle instrument 1 of the present disclosure may be modified as follows.
　入力部１１１が検出する操作スイッチ群ＳＷの操作状態は、ＯＦＦ状態／ＯＮ状態の他に、故障状態（Ｆａｉｌｅｄ状態）を含むように構成してもよい。この場合、スイッチ状態値ＳＶは、図５に示すように、３状態（ＯＦＦ状態／ＯＮ状態／Ｆａｉｌｅｄ状態）を持つ３つの操作スイッチＳＷ１～ＳＷ３の重複のない２７つの組み合わせの何れかを一意な数値０（０００００ｂ）～２６（１１０１０ｂ）で表すことができる。 The operation state of the operation switch group SW detected by the input unit 111 may include a failure state (Failed state) in addition to the OFF state / ON state. In this case, the switch state value SV is, as shown in FIG. 5, a unique one of 27 non-overlapping combinations of three operation switches SW1 to SW3 having three states (OFF state / ON state / Failed state). It can be represented by numerical values 0 (00000b) to 26 (11010b).
　故障状態を含む場合においては、ＯＦＦ状態やＯＮ状態よりも故障状態の出現頻度が低いため、故障状態を含む組み合わせが故障状態を含まない組み合わせよりもスイッチ状態値ＳＶの数値が高くなるように定義することが省電力の観点から好ましい。また、故障状態の数が多いほどスイッチ状態値ＳＶの値が高くなるように定義することが省電力の観点から好ましい。 In the case where a failure state is included, the frequency of occurrence of the failure state is lower than that of the OFF state or the ON state, so that the combination including the failure state has a higher value of the switch state value SV than the combination not including the failure state. Is preferable from the viewpoint of power saving. Further, it is preferable from the viewpoint of power saving that the switch state value SV is defined so as to increase as the number of failure states increases.
　また、スイッチ状態値ＳＶは、操作スイッチ群のスイッチ種別の使用頻度が高いほどスイッチ状態値の数値が低くなるように定義することで省電力の観点から好ましい。 The switch state value SV is preferably defined from the viewpoint of power saving by defining the switch state value to be lower as the use frequency of the switch type of the operation switch group is higher.
　また、出力部１１３は、スイッチ状態値ＳＶの値に応じて種々のパルス変調方式によって出力波形を異ならせるものであってもよい。具体的には、パルス密度変調（ＰＤＭ）信号の密度や正負によりスイッチ状態値ＳＶを区別する、パルス位置変調（ＰＰＭ）信号のパルス位置で区別する、パルス符号変調（ＰＣＭ）信号により標本化された信号で区別する、ように構成してもよい。 The output unit 113 may vary the output waveform by various pulse modulation methods according to the value of the switch state value SV. Specifically, the switch state value SV is distinguished by the density or the sign of the pulse density modulation (PDM) signal, the pulse position is distinguished by the pulse position of the pulse position modulation (PPM) signal, and the sampled signal is sampled by the pulse code modulation (PCM) signal. May be configured so as to be distinguished based on the signal.
　また、不揮発性メモリＲＯＭに記憶される操作スイッチ群ＳＷの操作状態の組み合わせと、その組み合わせに対応するスイッチ状態値ＳＶを対応付ける変換テーブルは、社内ネットワークＬＡＮを介して差し替え可能に構成してもよい。 Further, the conversion table that associates the combination of the operation states of the operation switch group SW stored in the nonvolatile memory ROM and the switch state value SV corresponding to the combination may be configured to be replaceable via the in-house network LAN. .
　１　　　車両用計器
　１０　　表示部
　１１　　制御部
　１１１　入力部
　１１２　変換部
　１１３　出力部
　ＲＯＭ　不揮発性メモリ（記憶部）
　ＳＶ　　スイッチ状態値
　ＰＷＭ　パルス幅変調信号
　ＳＷ　　操作スイッチ群
　ＳＷ１　操作スイッチ
　ＳＷ２　操作スイッチ
　ＳＷ３　操作スイッチ DESCRIPTION OF SYMBOLS 1 Vehicle instrument 10 Display part 11 Control part 111 Input part 112 Conversion part 113 Output part ROM Non-volatile memory (storage part)
SV switch state value PWM pulse width modulation signal SW operation switch group SW1 operation switch SW2 operation switch SW3 operation switch

Claims (5)

  1. 　操作スイッチ群の状態を入力する入力部と、
    　前記入力部から入力された前記操作スイッチ群の状態に対応する波形のパルス幅変調信号を出力する出力部と、
    　を備えた車両用計器。     An input unit for inputting a state of the operation switch group;
    An output unit that outputs a pulse width modulation signal having a waveform corresponding to a state of the operation switch group input from the input unit;
    Vehicle instrument provided with.
  2. 　前記操作スイッチ群の状態と前記パルス幅変調信号の波形との対応関係を表す変換テーブルを記憶する記憶部を備える、
    　請求項１に記載の車両用計器。     A storage unit that stores a conversion table that represents a correspondence between the state of the operation switch group and the waveform of the pulse width modulation signal,
    The vehicle instrument according to claim 1.
  3. 　前記変換テーブルは、前記操作スイッチ群の状態の組み合わせの出現頻度が高いほど前記パルス幅変調信号のＤｕｔｙ比が小さくなるように対応付けられている、
    　請求項２に記載の車両用計器。     The conversion table is associated such that the higher the frequency of appearance of the combination of the states of the operation switch group, the smaller the duty ratio of the pulse width modulation signal is.
    The vehicle instrument according to claim 2.
  4. 　前記変換テーブルは、前記操作スイッチ群の全てがＯＮ状態であるときに最も前記パルス幅変調信号のＤｕｔｙ比が小さくなるように対応付けられている、
    　請求項２に記載の車両用計器。     The conversion table is associated so that the duty ratio of the pulse width modulation signal is the smallest when all of the operation switches are in the ON state.
    The vehicle instrument according to claim 2.
  5. 　前記操作スイッチ群の状態は、ＯＦＦ状態、ＯＮ状態、故障状態の３状態を含み、
    　前記変換テーブルは、前記操作スイッチ群のいずれかが前記故障状態であるときが前記操作スイッチ群の全てが前記故障状態でないときの状態よりも前記パルス幅変調信号のＤｕｔｙ比が大きくなるように対応付けられている、
    　請求項２に記載の車両用計器。     The state of the operation switch group includes three states of an OFF state, an ON state, and a failure state,
    The conversion table is adapted so that when one of the operation switch groups is in the failure state, the duty ratio of the pulse width modulation signal is larger than when all of the operation switch groups are not in the failure state. Attached
    The vehicle instrument according to claim 2.
PCT/JP2019/034813 2018-09-06 2019-09-04 Vehicle instrument WO2020050323A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58219858A (en) * 1982-06-16 1983-12-21 Tokai Rika Co Ltd Method for converting and transmitting programmable parallel data
JPH09246973A (en) * 1996-03-11 1997-09-19 N T T Data Tsushin Kk Data communication method and data modulation and demodulation system
JPH11283456A (en) * 1998-03-30 1999-10-15 Harness Syst Tech Res Ltd Switch, information detection device having the same, and connected state detection device for connector
JP2015001515A (en) * 2013-06-18 2015-01-05 日本精機株式会社 Vehicular display apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58219858A (en) * 1982-06-16 1983-12-21 Tokai Rika Co Ltd Method for converting and transmitting programmable parallel data
JPH09246973A (en) * 1996-03-11 1997-09-19 N T T Data Tsushin Kk Data communication method and data modulation and demodulation system
JPH11283456A (en) * 1998-03-30 1999-10-15 Harness Syst Tech Res Ltd Switch, information detection device having the same, and connected state detection device for connector
JP2015001515A (en) * 2013-06-18 2015-01-05 日本精機株式会社 Vehicular display apparatus

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