JPH03251720A - Indicator - Google Patents

Indicator

Info

Publication number
JPH03251720A
JPH03251720A JP4892390A JP4892390A JPH03251720A JP H03251720 A JPH03251720 A JP H03251720A JP 4892390 A JP4892390 A JP 4892390A JP 4892390 A JP4892390 A JP 4892390A JP H03251720 A JPH03251720 A JP H03251720A
Authority
JP
Japan
Prior art keywords
section
pointer
stopper
signal
zero
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4892390A
Other languages
Japanese (ja)
Inventor
Masanori Noguchi
野口 正紀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Seiki Co Ltd
Original Assignee
Nippon Seiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Seiki Co Ltd filed Critical Nippon Seiki Co Ltd
Priority to JP4892390A priority Critical patent/JPH03251720A/en
Publication of JPH03251720A publication Critical patent/JPH03251720A/en
Pending legal-status Critical Current

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  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)

Abstract

PURPOSE:To minimize oscillation of a pointer in an indicator using a vehicle speedometer by moving the pointer to a position positive from a zero-point indicating position before an original carry as well as to the side negative from a stopper position when an input pulse signal from an object to be measured is below a lower measuring limit. CONSTITUTION:In a normal operation, a pulse signal of a frequency proportional to the vehicle speed is inputted into a converter 1 and a digital numeral value signal converted here is sent to a ROM section 21 within a driving section 2 made up of the ROM section 21, a D/A convertor section 22 and a drive output section 23 to be converted into an analog value with the D/A converter section 22. A voltage value or a current value obtained is amplified to be inputted into an X coil and a Y coil of an instrument. With such an arrangement, a data of a ROM section 3 is so set that an angle of deflection is given as negative from a zero-point position after a carry determined with a stopper when an input signal is below a lower measuring limit thereby enabling an indication to reach the stopper position smoothly.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は車両速度計に使用される交差コイル式計器や可
動コイル式計器等の指示計器に関するもので、特に被測
定対象からの入力信号が測定不適となる測定下限以下に
おける作動に特徴を有するものである。
Detailed Description of the Invention (Field of Industrial Application) The present invention relates to indicating instruments such as crossed coil instruments and moving coil instruments used in vehicle speedometers. It is characterized by operation below the lower limit of measurement, which makes measurement inappropriate.

(従来の技術) 交差コイル式計器や可動コイル式E1器を用いた電気式
の速度計に在っては、車速と比例したパルス入力(Z号
を受けると、駆動部においてこれと対応する指示駆動電
流を出力して所定の指示表示を行っているもので、一般
的には第2図(イ)に示しているように入力信号と比例
する出力信号即ち指針が所定の角度を保持するに必要な
駆動電流を出力しており、特に零指示近傍においては所
定の入力信号以下を零指示出力としているものである。
(Prior art) In electric speedometers using crossed coil type meters or moving coil type E1 devices, when a pulse input (Z signal) proportional to the vehicle speed is received, a corresponding instruction is sent to the drive unit. It outputs a drive current to display a predetermined instruction. Generally, as shown in Figure 2 (a), the output signal is proportional to the input signal, that is, when the pointer maintains a predetermined angle. It outputs the necessary drive current, and especially in the vicinity of the zero indication, the input signal below a predetermined input signal is set as the zero indication output.

これは被測定対象からの入力信号をパルス信号で受けた
とき、入力パルスの間隔が長いとその測定が困難となる
ので、所定の入力周期より長いものは総て「0」と判定
し、出力するものである。この指示特性を以てそのまま
指針指示を行うと、零点近傍の表示が不自然となってし
まうので、可動コイル型計器では正規の零点指示位置よ
りも少し振れ角のプラス方向側に移動した位置にストッ
パーを設け、とのストッパー位置を表示上の零点として
、或る一定以上の駆動電流が流れて始めて指針が動作す
る所謂ケタ上げと称される手段が採用されている。
This is because when the input signal from the object to be measured is received as a pulse signal, it becomes difficult to measure it if the interval between the input pulses is long, so all input pulses longer than a predetermined input period are determined to be "0", and the output is It is something to do. If the pointer is indicated with this indication characteristic as it is, the display near the zero point will be unnatural, so in a moving coil type instrument, the stopper is placed at a position slightly moved in the positive direction of the deflection angle from the normal zero point indicating position. A so-called digit raising method is adopted in which the stopper position is set as the zero point on the display and the pointer operates only when a drive current of a certain level or more flows.

(発明が解決しようとする課題) 前述したケタ上げ手段に於て、特に急激に指針が減少指
示方向へ移行する場合に、指針動作に不自然さが生ずる
。即ち第3図(イ)に示すように現実の車速Aが減少し
、測定下限に達し駆動出力値Bが零となっても、指針動
作Cはダンパオイルその他機械的摩擦等によって遅れて
しまうから、現実にはストッパーの位置に達しない前に
指針に対して零指示出力(零点指示出力また出力零)が
なされ、指針指示動作がそれまでの動きより早くなって
しまうものである。
(Problems to be Solved by the Invention) In the above-mentioned digit raising means, unnatural movement of the pointer occurs, particularly when the pointer suddenly moves in the direction of decreasing instruction. That is, as shown in Figure 3 (a), even if the actual vehicle speed A decreases and reaches the lower limit of measurement and the drive output value B becomes zero, the pointer operation C will be delayed by damper oil and other mechanical friction. In reality, a zero instruction output (zero point instruction output or output zero) is made to the pointer before it reaches the stopper position, and the pointer instruction movement becomes faster than the previous movement.

そこで本発明は前記の指針動作の不自然さを解消せんと
するものである。
Therefore, the present invention aims to solve the above-mentioned unnatural movement of the pointer.

(課題を解決するための手段) 本発明に係る指示計器は、被測定対象からの入力信号に
対応する指針駆動電流の出力をなす計器駆動部を備えた
指示計器に於て、被測定対象からの入力イー号が測定下
限以下の場合に、計器駆動部から予め定めた所定値の出
力を行うと共に当該所定値の出力で指示される指針位置
よりも、プラス位置に指針ストッパーを設けたことを特
徴とするものである。
(Means for Solving the Problems) An indicating instrument according to the present invention is an indicating instrument equipped with an instrument drive section that outputs a pointer drive current corresponding to an input signal from the object to be measured. When the input E is below the lower limit of measurement, a predetermined value is output from the instrument drive part, and the pointer stopper is installed at a plus position than the pointer position indicated by the output of the specified value. This is a characteristic feature.

(作 用) 第2図(ロ)に示すように入力信号が測定下限以下の場
合は、駆動部から所定値の出力をなすと、第3図(ロ)
に示すように車速Aの減少によって車速Aが測定下限以
下となったときの当該時点での指針指示位置と、前記所
定値の駆動出力と対応する指針指示位置との差異は、従
来の零指示出力と比較すると格段にその差異よりも小さ
いので、指針動作が急激に変動せず、スムーズに変動す
ることになる。
(Function) As shown in Figure 2 (B), if the input signal is below the lower measurement limit, the drive section outputs a predetermined value, as shown in Figure 3 (B).
As shown in the figure, the difference between the pointer indicated position at the time when the vehicle speed A becomes below the measurement lower limit due to a decrease in the vehicle speed A and the pointer indicated position corresponding to the drive output of the predetermined value is the difference between the conventional zero pointer Compared to the output, the difference is much smaller, so the pointer movement does not fluctuate abruptly, but fluctuates smoothly.

(実施例) 次に本発明を交差コイル型の車速計に実施した例につい
て次に説明する。
(Example) Next, an example in which the present invention is implemented in a cross-coil type vehicle speed meter will be described below.

計器の全体の構成は、変換部1.駆動部2゜表示部(計
器本体)3からなり、変換部1は車速と比例するパルス
入力信号を受は単位時間当たりのパルス入力数に対応し
たデジタル数値45号に変換するものである。駆動部2
はROM部21.D−A変換部22及び駆動出力部23
よりなり、ROM部21は前記のデジタル数値信号と対
応する後述の表示部3の交差コイルX、Yに通電量を指
示するデータをメモリし、メモリデータをデジタル出力
するもので、本発明の特徴は変換部1からの測定下限以
下に対して駆動部が所定の出力をなすデータをメモリし
ている点にある。即ち所定の低指示角領域(零点近傍)
では、車速の低下によって入力パルス信号の周期が長く
なって、これを測定することが不適当になってしまうの
で、所定の周期以下の場合は一律に所定のデジタル数値
の出力とし、この測定下限以下のデジタル数値入力を受
けるとROM部21には本来の零点指示角度よりもプラ
スの指示角に指針が駆動されるべくx、yコイル通電量
のデータをメモリし、測定可能入力と対応する指示色領
域では車速と指示角度が比例するようにX、Yコイルに
入力量に対するサイン値およびコサイン値の通電出力が
なされるデータをメモリしておくものである。D−A変
換部22は前記メモリに基づ/、ROM部21からのデ
ジタル信号を各々アナログ量に変換するものであり、駆
動出力部23は前記アナログ量に対応して交差コイルX
、Yへの通電をなすものである。表示部3は所謂言1器
本体で、フレームを組み合わせ形成したボビン内に、可
動磁石を内装し、フレーム外面に交差コイルx、Yを捲
回し、前記可動磁石に指針軸を突設し、指針軸に指針を
装着すると共に、前記の測定下限以下の時の駆動出力に
よる指針指示位置よりもプラス側に指針軸のストッパー
及び零点指示表示を設けてなるものである。
The overall configuration of the instrument consists of converting section 1. It consists of a drive section 2 and a display section (instrument body) 3, and a conversion section 1 converts a pulse input signal proportional to the vehicle speed into a digital number 45 corresponding to the number of pulse inputs per unit time. Drive part 2
is the ROM section 21. D-A conversion section 22 and drive output section 23
The ROM section 21 stores data instructing the amount of current to be applied to the cross coils X and Y of the display section 3, which will be described later, corresponding to the digital numerical signal, and outputs the memory data digitally, which is a feature of the present invention. This is because the drive section stores data that causes a predetermined output from the conversion section 1 below the measurement lower limit. In other words, a predetermined low indication angle region (near the zero point)
In this case, the cycle of the input pulse signal becomes longer due to a decrease in vehicle speed, making it inappropriate to measure it. Therefore, if the cycle is less than a predetermined cycle, a predetermined digital value is uniformly output, and this measurement lower limit is set. When the following digital numeric input is received, the ROM section 21 stores data on the x and y coil energization amounts so that the pointer is driven to a more positive indication angle than the original zero point indication angle, and gives instructions corresponding to the measurable input. In the color area, data is stored in memory for energizing and outputting sine and cosine values of the input amount to the X and Y coils so that the vehicle speed and indicated angle are proportional. The D-A converter 22 converts the digital signals from the memory/ROM unit 21 into analog quantities, and the drive output unit 23 converts the cross coils X in accordance with the analog quantities.
, Y is energized. The display unit 3 is a so-called one-piece main body, in which a movable magnet is housed in a bobbin formed by combining a frame, cross coils x and Y are wound on the outer surface of the frame, and a pointer shaft is protruded from the movable magnet, A pointer is attached to the shaft, and a stopper of the pointer shaft and a zero point indicating display are provided on the plus side of the pointer indicated position by the drive output when the value is below the lower limit of measurement.

次に前記実施例の動作について説明する。Next, the operation of the above embodiment will be explained.

通常時は車速に比例した周波数のパル348号が変換部
1に入り、変換部1は入力周波数と比例したデジタル数
値信号を出力し、ROM部21に入力する。ROM部2
1では入力したデジタル数値信号と対応した各コイルへ
の出力デジタル信号を出力するもので、この出力デジタ
ル信号をD−A変換部22でアナログ量(電圧値または
電流値)に変換し、前記アナログ量を増幅し、交差コイ
ルx、Yに通電するものである。
Normally, pulse No. 348 with a frequency proportional to the vehicle speed enters the converter 1, and the converter 1 outputs a digital numerical signal proportional to the input frequency and inputs it into the ROM unit 21. ROM section 2
1 outputs an output digital signal to each coil corresponding to the input digital numerical signal, and this output digital signal is converted into an analog quantity (voltage value or current value) by the D-A converter 22, and the analog This is to amplify the amount and energize the crossed coils x and Y.

従って指針の指示特性は、ROM部3にメモリされたデ
ータによるもので、入力信号の測定下限以下以外は入力
デジタル信号のコサイン値或いはサイン値が出力デジタ
ル信号となり、これをアナログ量に変換するものである
から、車速に比例した指針振れ角で指針指示がなされる
ものである。また入力信号が測定下限以下のときは、ス
トッパーで定めたケタ上げ後の零点指示位置(本来のケ
タ上げ前の零点指示よりもプラス側に位置する)よりも
マイナスの振れ角となるようにROM部3のデータが定
められているため、指針はストッパーを軽く押している
状態となる。更に急激に車速が減少した場合には、駆動
出力に対して指針指示の動作の遅れが顕著に現れるが、
特に車速が測定下限以下となり、指針がストッパーより
プラス側を指示していたとしても、測定下限以下の指針
駆動位置はケタ上げ前の本来の零点指示位置ではなく、
ストッパーによるケタ上げ後の零点指示位置に近い位置
を指示するように作用しているため、指針はスムーズに
ストッパー位置に達するものである。
Therefore, the indication characteristics of the pointer are based on the data stored in the ROM section 3, and unless the input signal is below the measurement lower limit, the cosine value or sine value of the input digital signal becomes the output digital signal, and this is converted into an analog quantity. Therefore, the pointer is instructed with a pointer deflection angle that is proportional to the vehicle speed. In addition, when the input signal is below the measurement lower limit, the ROM is set so that the deflection angle is more negative than the zero point indication position after digit raising determined by the stopper (located on the plus side than the original zero point indication before digit raising). Since the data for section 3 is determined, the pointer is in a state where it is lightly pressing the stopper. If the vehicle speed further decreases rapidly, there will be a noticeable delay in the operation of the pointer instruction relative to the drive output.
In particular, even if the vehicle speed is below the measurement lower limit and the pointer is pointing to the positive side of the stopper, the pointer drive position below the measurement lower limit is not the original zero point indication position before raising the digit.
Since the pointer acts to indicate a position close to the zero point indicating position after the digit is raised by the stopper, the pointer smoothly reaches the stopper position.

尚前記実施例は交差コイル型計器について説明したが、
本発明は必ずしも交差コイル型計器に限定されるもので
なく、可動コイル型i+vJにおいても同様にできるこ
とは勿論である。
Although the above embodiment described a crossed coil type instrument,
It goes without saying that the present invention is not necessarily limited to crossed coil type meters, but can also be applied to moving coil type i+vJ.

(発明の効果) 以上のように本発明に係る指示言1器は被測定対紮から
の入力パルス信号の測定下限以下のときは本来のケタ上
げ前の零点指示位置よりもプラス位置で且つストッパー
位置よりもマイナス側に指針が指示される駆動出力をな
すようにしたもので、ストッパーによる零点指示での指
針指示の揺動を抑えると共に、急激な変化に対しても指
針動作に不自然さが生じないようにしたものである。
(Effects of the Invention) As described above, when the input pulse signal from the digit to be measured is below the measurement lower limit, the indicator 1 according to the present invention is in a plus position than the original zero point indicating position before raising the digit, and the stopper The drive output is such that the pointer is directed to the negative side of the position, which suppresses the fluctuation of the pointer indication when the stopper indicates the zero point, and also prevents unnatural movement of the pointer even in the case of sudden changes. This was done to prevent this from occurring.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の実施例の計器のブロック図、第2図は
従来例と本発明の入力信号を駆動電流による振れ角との
関係を示したグラフで、(、f)は従来例、(ロ)は本
発明の実施例を示し、第3図は急激な減速時の指針の動
作を示したもので、(イ)は従来例、(ロ)は本発明の
実施例を示す。 1は変換部 2は駆動部 21はROM部 22はD−A変換部 23は駆動出力部 3は表示部 第3 図 第2 図
FIG. 1 is a block diagram of a meter according to an embodiment of the present invention, and FIG. 2 is a graph showing the relationship between the input signal and the deflection angle due to the drive current of the conventional example and the present invention, where (, f) is the conventional example, (B) shows an embodiment of the present invention, FIG. 3 shows the operation of the pointer during rapid deceleration, (A) shows a conventional example, and (B) shows an embodiment of the present invention. 1 is a conversion section 2 is a drive section 21 is a ROM section 22 is a D-A conversion section 23 is a drive output section 3 is a display section 3

Claims (1)

【特許請求の範囲】[Claims] (1)被測定対象からの入力信号に対応する指針駆動電
流の出力をなす計器駆動部を備えた指示計器に於て、被
測定対象からの入力信号が測定下限以下の場合に、計器
駆動部から予め定めた所定値の出力を行うと共に当該所
定値の出力で指示される指針位置よりも、プラス位置に
指針ストッパーを設けたことを特徴とする指示計器。
(1) In an indicating instrument equipped with an instrument drive section that outputs a pointer drive current corresponding to an input signal from the object to be measured, when the input signal from the object to be measured is below the lower measurement limit, the instrument drive section What is claimed is: 1. An indicating instrument that outputs a predetermined value from a predetermined value and is provided with a pointer stopper at a plus position than the pointer position indicated by the output of the predetermined value.
JP4892390A 1990-02-28 1990-02-28 Indicator Pending JPH03251720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4892390A JPH03251720A (en) 1990-02-28 1990-02-28 Indicator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4892390A JPH03251720A (en) 1990-02-28 1990-02-28 Indicator

Publications (1)

Publication Number Publication Date
JPH03251720A true JPH03251720A (en) 1991-11-11

Family

ID=12816777

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4892390A Pending JPH03251720A (en) 1990-02-28 1990-02-28 Indicator

Country Status (1)

Country Link
JP (1) JPH03251720A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6232371B2 (en) * 1978-10-27 1987-07-14 Taikisha Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6232371B2 (en) * 1978-10-27 1987-07-14 Taikisha Kk

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