JP5170393B2 - Instrument drive - Google Patents

Description

  The present invention relates to an instrument driving device provided separately from a vehicle combination meter.

  Conventionally, it is called an aftermeter that can be attached to a dashboard, instrument panel (instrument panel), etc., apart from an existing combination meter in which a speedometer, tachometer, thermometer, and fuel gauge are housed in a case body. Instrument is known. As this after meter, for example, a single analog display unit is housed in a case, and there is a meter or a light emitting display for displaying single vehicle information (for example, engine speed) of the vehicle. There are instruments that digitally display. Such an instrument is often mounted on a racing vehicle running on a circuit racetrack or the like, a supercharger, a turbo-equipped vehicle, or the like. These types of instruments include a tachometer that monitors the engine speed, an intake pressure gauge (boost meter) that monitors the boost pressure of the engine, an exhaust thermometer that monitors the exhaust gas exhaust temperature, and the engine oil temperature. There are oil temperature gauges, oil pressure gauges that monitor engine oil pressure, and fuel pressure gauges that monitor fuel pressure.

  Further, the applicant of the present application has proposed a meter driving device disclosed in Patent Document 1 as a driving device for an aftermeter that is assumed to be arranged in plural. The instrument driving device proposed in Patent Document 1 includes an input port that enables input of a plurality of state signals according to vehicle information, and a single control for obtaining each measurement value according to the plurality of state signals A unit is provided to communicate between the control unit and each instrument by serial data generated by the control unit, simplifying the installation work even when a plurality of instruments are provided, and Each instrument can be attached without deteriorating the beauty of the dashboard and the instrument panel.

Further, in the control means for driving the after meter such as the above-mentioned control unit, the state signal varies due to various causes. Therefore, when the instrument is displayed based on the measurement value, the control means is controlled. In general, the measurement is performed based on the result of averaging the measured values by a predetermined number. When the number of the averaging processes is large, it is possible to absorb the noise of the state signal as much as it is, and reduce the needle shake, the slight shake of the needle, the display flicker, and the like.
JP 2000-18974 A JP-A-9-105648

  Originally, the aftermeter is a product according to a user who wants to monitor vehicle information in more detail, and therefore tends to have a short display update period and a high display response. However, the display responsiveness varies depending on the user's preferences, such as variations in the status signal depending on the vehicle, feeling of discomfort in hand shake, etc., and high display responsiveness. There was room for further improvement. Patent Document 2 discloses a method of changing the display update time as a method of changing the display responsiveness of the instrument. However, when changing the display update time, the display responsiveness is particularly lowered (display update). When the period is increased), when the amount of change in the vehicle information is large, the change in the display value after the display update is large, so that smooth display cannot be performed and display quality cannot be maintained.

  In view of the above-mentioned problems, the present invention further improves the after-meter driving device, and is capable of display operation with a display responsiveness suitable for the mounted vehicle and the user's preference while maintaining display quality. An object is to provide a drive device.

  In order to solve the above-mentioned problem, the present invention is provided with a control unit that inputs a state signal indicating vehicle information, calculates a measurement value based on the state signal, and causes a display unit to perform display operation based on the measurement value. The control unit is configured to display the display unit based on a result of averaging the measured values by a predetermined average number, and stores a plurality of pieces of average number information of the averaging process. And a setting means for setting the average number.

  Further, the control means is a control unit provided separately from the instrument, and the control unit inputs a plurality of state signals indicating vehicle information, and calculates each measured value of the vehicle information based on each state signal. Obtaining and averaging the measured values, converting the result into serial data, transmitting the serial data to the instrument, the instrument receives the serial data, the display unit according to the serial data A display operation is performed, and the serial data is transmitted to another instrument.

  The control unit can set a different average number for each piece of vehicle information.

  The present invention relates to a driving device for an instrument provided separately from a combination meter for a vehicle, and can perform a display operation with a display responsiveness suitable for a mounted vehicle and a user's preference. .

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The overall configuration of the instrument driving apparatus will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the instrument driving device mainly includes a control unit (control unit) 1, an analog meter (instrument) 2, a digital meter (instrument) 3, and an operation switch 4. .

  The control unit 1 is composed of a microcomputer, and an A / D conversion unit that inputs each state signal indicating vehicle information, a CPU that executes a predetermined processing operation program, a ROM that stores the processing operation program and the like, A RAM that temporarily stores data processed by the CPU, a parallel / serial conversion unit (P / S conversion unit) that converts parallel data into serial data, an EEPROM that stores various settings in a nonvolatile manner, The storage unit includes a backup RAM and the like, and a transmission unit that transmits the serial data in a predetermined cycle. The storage unit stores a plurality of pieces of average number information in a display responsiveness setting function described later. When the state signal indicating the vehicle information is input, the control unit 1 performs a predetermined calculation process according to the state signal, calculates each measurement value of the vehicle information, and averages the measurement values. . Further, in the normal operation mode, the control unit 1 converts the model code for identifying the model of the instrument and the parallel data that is the result of the averaging process of the respective measurement values into serial data, and the wiring members 4a and 4b. To the control means to be described later of the analog meter 2 and the digital meter 3. The wiring member 5 a is a wiring member including a multiplex transmission communication line for transferring serial data from the control unit 1. One end is connected to the control unit 1 and the other end is connected to the control means of the analog meter 2. The wiring member 5b has the same configuration as the wiring member 4a, and one end is connected to the control means of the analog meter 2 and the other end is connected to the control means of the digital meter 3. Therefore, in the present embodiment, the serial data from the control unit 1 is transmitted in the order of analog meter 2 → digital meter 3.

  In addition, the meter drive device sets (changes) the number (hereinafter referred to as the average number) for averaging the measured values for each vehicle information in accordance with a predetermined operation of the operation switch 4 connected to the control unit 1. ) Has a possible display response setting function.

  As shown in FIG. 2, the analog meter 2 is an analog meter in which a control unit 2a and an analog display unit 2b having a pointer are housed in a case body.

  The control means 2a comprises a microcomputer, receives the serial data transmitted by the control unit 1, and controls the display unit 2b based on the serial data. Further, the control means 2a transfers the serial data to the control means 3a of the digital meter 3 through the wiring member 4b.

  As shown in FIG. 2, the digital meter 3 is a digital meter in which a control means 3a and a light emitting display (display unit) 3b made of an organic EL panel or a liquid crystal panel are housed in a case body.

  The control means 3a comprises a microcomputer, and receives the serial data transmitted by the control unit 1 via the analog meter 3, and controls the light emitting display 3b based on the serial data.

  The operation switch 4 includes, for example, a plurality of push button switches, and performs various settings of the control unit 1 or the meters 2 and 3. In the present embodiment, the average number is set in the display responsiveness setting function, particularly when the user operates the operation switch 4 in a predetermined manner.

  The above-described units constitute a meter driving device.

  Next, a processing method in the display responsiveness setting function will be described with reference to FIG. The following describes the case where the display responsiveness of the digital meter 3 is set.

  First, when the control unit 1 detects that the user's setting operation has been performed by the operation switch 4, it determines whether the setting operation has selected the “Sports mode” or the “Stability mode” ( Step S1). In the present embodiment, as a setting method of the display responsiveness setting function, either the “Sports mode” in which the user has a higher responsiveness or the “Stability mode” in which the stability of the display is improved by reducing the responsiveness. I choose to do that. The setting method is not limited to this embodiment, and two or more steps may be set, or the average number may be set directly by an input operation of the operation switch 4. If it is determined in step S1 that the “Sports mode” has been selected, the control unit 1 proceeds to step S2. On the other hand, if it is determined in step S1 that the “Stability mode” has been selected, the process proceeds to step S3.

  In step S2, the control unit 1 reads the average number corresponding to the “Sports mode” from the average number information stored in the storage unit, and sets the read average number as a new average number. In the present embodiment, the average number is set to 4 in the “Sports mode”, and the display update period is every 200 msec.

  In step S <b> 3, the control unit 1 reads the average number according to the “Stability mode” from the average number information stored in the storage unit, and sets the read average number as a new average number. In the present embodiment, the average number is set to 8 in the “Stability mode”, which is larger than that in the “Sport mode”, and the display update period is equal to that of the “Sport mode” every 200 msec.

  When the setting of the average number is completed, the control unit 1 executes the measurement value averaging process based on the newly set average number, and displays the digital meter 3 based on the result of the averaging process.

  The instrument driving apparatus according to the present embodiment is a case where the user desires a high display responsiveness by enabling the user to change the average number of the measurement value averaging processes so that the user can change the display responsiveness. By reducing the average number, sudden changes in vehicle information can be instantly reflected in the display, and when a stable display response is desired, increasing the average number can cause variations in the state signal. Can be absorbed and needle shake and flickering of the display can be reduced. Furthermore, since there is no need to change the display update cycle, display can be performed smoothly even when the display responsiveness is lowered, and the display quality can be maintained.

  Further, in the present embodiment, the control unit 1 provided separately from the analog meter 2 and the digital meter 3 is provided and the analog meter 2 and the digital meter 3 are linked. It is good also as a structure which controls each meter 2 and 3 independently by the control means 2a and 3a incorporated in the meters 2 and 3. FIG.

The block diagram which shows the structure of the drive device of the meter of embodiment of this invention. The block diagram which shows the structure of the instrument in the drive device of an instrument same as the above. The flowchart figure which shows the processing method of the display responsiveness setting function in the drive device of an instrument same as the above.

Explanation of symbols

1 Control unit (control unit)
2 Analog meters (instruments)
2a Control means 2b Display unit 3 Digital meter (instrument)
3a Control means 3b Light emitting display (display unit)
4 Operation switches (setting means)

Claims (3)

An instrument driving device including a control unit that inputs a state signal indicating vehicle information, calculates a measurement value based on the state signal, and causes a display unit to perform display operation based on the measurement value,
The control means is configured to display the display unit based on a result obtained by averaging the measured values with a predetermined average number, a storage unit that stores a plurality of average number information of the averaging process, and the average And a setting means for setting the number. The control means is a control unit provided separately from the instrument, and the control unit inputs a plurality of state signals indicating vehicle information, and obtains each measurement value of the vehicle information based on each state signal, The result of averaging each measurement value is converted into serial data, and the serial data is transmitted to the instrument,
2. The instrument drive according to claim 1, wherein the instrument receives the serial data, causes the display unit to perform a display operation according to the serial data, and transmits the serial data to another instrument. apparatus. 3. The instrument driving apparatus according to claim 2, wherein the control unit can set a different average number for each piece of vehicle information.

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