JP3054920U - Mileage measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] Measurement is performed while adding calculations to the mileage of a car. By enabling communication with the outside, it is possible to process complex calculations with a computer that evolves every day. The mileage that can display is performed. [Structure] Distance sensor signal (2) and calculation instruction signal (3)
And a communication connector (6) for communicating with a control signal (7), which is an external input signal, and distance information (8), which is an output signal to the outside, via an input unit and a communication interface (5). An arithmetic processing unit (1) for performing an arithmetic operation based on an input signal and a display unit (4) for displaying the operation result of the main arithmetic processing unit.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 This invention relates to measuring the mileage of an automobile.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 2, the arithmetic processing unit (1) uses a distance sensor signal (2) and an arithmetic instruction signal (3) from an input button switch or the like to execute cumulative addition, subtraction, reset, pause, etc. of the mileage. The arithmetic processing was performed, and the result was shown on the display unit (4).

[Problems to be solved by the invention]

 This had the following disadvantages. (B) The arithmetic processing unit could only perform processing determined by the contents programmed in this part. (B) To implement complicated calculations in the mileage measuring device, it was necessary to create a large-scale processing unit including programs. (C) Updating the contents of the arithmetic processing requires modification inside the device, which is inconvenient.

[0004]

[Means for Solving the Problems]

 A communication connector (6) is provided in the configuration of the conventional mileage measuring device, and a communication interface (5) is provided between the connector and the arithmetic processing unit (1). Then, communication is performed between the communication connector (6) and the outside of the apparatus via the communication interface (5) using a control signal (7) and distance information (8). This is a traveling distance measuring device having the above configuration.

[0005]

[Action]

 Unlike the conventional method, the arithmetic processing unit can be controlled by an external signal, so that it can be used in a wide variety of applications. Therefore, the programming of the arithmetic processing unit (1) can be reduced to the minimum necessary. This makes it possible to build a mileage measuring device on a small scale. Also, when complicated calculations are required, signals can be exchanged with the outside, so they can be processed by an external computer that develops every day, and the results can be obtained by the control signal (7). Can also respond. In addition, since it is easy to change and update the arithmetic processing with an external computer, if the arithmetic processing is changed or revised externally, the specifications can be changed without changing the arithmetic processing section of the device itself and updating. In addition, no modification inside the device is required.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described. The input of the distance sensor signal (2), which is a pulse signal obtained from an automobile, and the operation instruction signal (3) obtained from switches mounted on the panel of the device, the operation processing unit (1) and the communication connector (6) A communication interface (5) for converting to a serial communication protocol, a control signal (7) obtained as an input from an external computer via this interface, and a distance as an output to the external computer. An information processing unit (1) of an 8-bit CPU that has information (8) and the communication connector (6) for electrical connection and performs arithmetic processing based on the input signals (2), (3) and (7). ) And a display section (4) for displaying the calculation results by 7-segment LEDs.

When the present invention is used in the above configuration, when the communication connector (6) is not used, it operates as a conventional device by the distance sensor signal (2) and the operation instruction signal (3). It functions as a device that performs functions such as cumulative addition, subtraction, reset, and pause of the mileage, and displays the result on the display unit (4) of the 7-segment LED. When the communication connector (6) is used, arithmetic processing can be performed while communicating with an external computer, so that complicated arithmetic operations and changes in arithmetic can be performed by the external computer. In 1), only the processing function of the 8-bit CPU is sufficient. The arithmetic processing unit (1) controls the simple operations such as the cumulative addition and subtraction of the conventional distance operation and the display of the 7-segment LED on the display unit (4), and converts the signals into serial signals via the communication interface (5). The distance information (8) to the outside. Conversely, the arithmetic processing unit (1) receives a control signal (7) of a serial signal from the external through the communication interface (5), and receives the result of the calculation depending on the content. Shown in 4).

[0008]

[Effect of the invention]

 Complex arithmetic can exchange signals with the outside, so it can be processed by an external computer that develops every day.There is no decline in functions associated with industrial development. The device can be made with the configuration. Similarly, by revising the arithmetic processing with an external computer, the arithmetic processing can be changed and revised, so that the specification does not need to be changed and the internal modification of the equipment is not required each time the revision is revised. For example, if the time factor data is included on an external computer, it can be displayed on this device as a display control as speed signal information. The system can also serve as a highly functional distance sensor. Furthermore, it can be used as various applied devices by using a communication line. Although the display unit has seven segments, the specification of the dot matrix display device may be adopted as the industry develops in the future, or the communication connector may be of the optical communication type which is resistant to noise.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a traveling distance measuring device according to the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional traveling distance measuring device.

[Explanation of symbols]

 (1) Calculation processing unit (2) Distance sensor signal (3) Calculation instruction signal (4) Display unit (5) Communication interface (6) Communication connector (7) Control signal (8) Distance information

Claims (1)

[Utility model registration claims] An input signal of a distance sensor signal (2) and an operation instruction signal (3), and a control which is an external input signal to an operation processing section (1) via a communication interface (5). The arithmetic processing unit (1) has a communication connector (6) for communicating with the signal (7) and distance information (8) as an external output signal.
(3) A travel distance measuring device that performs a calculation based on (7) and has a display unit (4) for displaying the calculation result of the calculation processing unit (1).