JP2788287B2 - How to adjust the indicated value of the instrument - Google Patents
How to adjust the indicated value of the instrumentInfo
- Publication number
- JP2788287B2 JP2788287B2 JP1137384A JP13738489A JP2788287B2 JP 2788287 B2 JP2788287 B2 JP 2788287B2 JP 1137384 A JP1137384 A JP 1137384A JP 13738489 A JP13738489 A JP 13738489A JP 2788287 B2 JP2788287 B2 JP 2788287B2
- Authority
- JP
- Japan
- Prior art keywords
- value
- instrument
- indicated
- indicated value
- cpu
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 description 7
- 230000003321 amplification Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
この発明は、スピードメータ，タコメータ，液温計等
の各種計器の指示値調整方法に関する。The present invention relates to a method for adjusting indicated values of various instruments such as a speedometer, a tachometer, and a liquid thermometer.
従来の計器の指示値調整方法としては指針を目盛板の
特定の指示値に合せるように指針軸に打込み固着し、そ
ののち指針が例えば最大振れ角まで回動するような信号
を駆動回路より出力させ、このときの指針の指示値を目
測しながら指針が駆動回路よりの出力信号に対応して適
正な振れ角で回動するか否かを目で確認していた。As a conventional method of adjusting the indicated value of an instrument, a pointer is driven into a pointer shaft so as to match a specific indicated value on a scale plate, and then a signal is output from a drive circuit such that the pointer rotates to, for example, a maximum swing angle. At this time, while visually checking the indicated value of the pointer at this time, it was visually confirmed whether or not the pointer rotated at an appropriate swing angle in accordance with the output signal from the drive circuit.
しかしながら、このような従来の計器の指示値調整方
法にあっては指針を目盛板の特定の指示値に合せる打込
み作業は手作業であるため、指示精度にばらつきがあ
り、また各種計器の指針の位置確認を目測で行っていた
ため、指示調整に時間が掛るという問題点があった。 この発明はこのような従来の問題点に着目してなされ
たもので、指示調整時間を短縮すると共に、指示精度を
向上させるようにした計器の指示値調整方法を提供する
ことを目的とする。However, in such a conventional method of adjusting the indicated value of an instrument, since the driving operation for adjusting the pointer to a specific indicated value on the scale plate is a manual operation, there is a variation in the indicating accuracy, and also, the indices of the indicators of various instruments are different. Since the position confirmation was performed by eye measurement, there was a problem that it took time to adjust the instruction. SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has as its object to provide a method of adjusting an indicated value of an instrument which shortens an indicated adjustment time and improves an indicated accuracy.
この発明に係る計器の指示値調整方法は、計器の指示
値が規格値になるように増幅器を介して前記計器を特定
の大きさの入力信号で駆動させる工程と、前記計器の表
示面に対向配置された計測用カメラによって、前記指示
値を読み取る工程と、この読み取った計測値と規格値を
比較して前者が後者の範囲内か否かを判断し、範囲外の
場合は、前記計測値と前記規格値との差の大きさ及び差
の正負を基準にして、計測値が所定の指示をするように
CPU内の増幅器のゲインを増幅させ、その結果をRNAに書
き込むと共に、前記計器を再度駆動させて、前記計測値
が前記規格値の範囲内に入るまで上記の動作を繰り返
し、前記規定値の範囲内に入った場合、前記指示値のゲ
インを前記RNAからE2PROM（４）に書き込むようにした
ものである。A method of adjusting the indicated value of a meter according to the present invention includes the steps of: driving the meter with an input signal of a specific magnitude via an amplifier so that the indicated value of the meter becomes a standard value; and opposing a display surface of the meter. With the arranged measuring camera, reading the indicated value, and comparing the read measured value with a standard value to determine whether the former is within the latter range, and when the measured value is out of the range, the measured value is The magnitude of the difference between the measured value and the standard value and the sign of the difference are used as a reference, so that the measured value indicates a predetermined instruction.
Amplify the gain of the amplifier in the CPU, write the result to RNA, drive the meter again, and repeat the above operation until the measured value falls within the range of the standard value. When the value falls within the range, the gain of the indicated value is written from the RNA into the E 2 PROM (4).
この発明における計器の指示値調整方法は計器の表示
面の指針による指示値を読取り、読取った値を特定の値
になるように補正した後、RAMに書込み、書込んだ値に
基づいて駆動された指示値が特定の値を含む所定範囲内
に入ったときにE2PROMに書込むようにすることにより計
器の特性に合せたデータをE2PROMに書込むことができ
る。According to the method of adjusting the indicated value of the meter according to the present invention, the indicated value is read by the pointer on the display surface of the meter, the read value is corrected so as to be a specific value, then written in the RAM, and driven based on the written value. the data tailored to the characteristics of the instrument by the so written in E 2 PROM can be written to the E 2 PROM when the indicated value is within the predetermined range including a specific value.
以下、この発明の一実施例を図面に基づいて詳細に説
明する。 第１図はこの発明の一実施例を示す構成図で、図にお
いて、１は計器、２はこの計器１の表示面を読み取る計
測用カメラである画像処理用カメラ、３は画像処理シス
テムと調整システムの機能のプログラムを有するCPU、
４は駆動回路５から計器本体に特定の大きさの入力信号
を供給した場合に計器１の指針が所定の目盛を指示する
ように後述のCPU7の入力信号の増幅ゲインを決めるため
のデータが書き込まれるE2PROM、５は計器１を駆動させ
る駆動回路である。 次に第２図に基づいて動作について説明する。まず、
計器本体１の指針軸に指針を打込み、固着した後、計器
１を画像処理カメラ２の前に設置する。そして、ステッ
プST1で検査のスタートスイッチがオンされ、その信号
がCPU3に入力されると、CPU3内のRAM等を初期設定す
る。ステップST2では計器本体１を特定の値、例えば0km
/h、100km/h等に指示させるための信号をCPU3内のRAMに
設定する。この場合ステップST1からステップST2に進ん
だときは0km/hを、ステップST8からのときは100km/hを
設定する。そしてステップST3では、計器本体１の指針
が特定の目盛を指示するように特定の大きさの指示信号
を、CPU3内の増幅機能（増幅器）で所定のゲインで増幅
した後、駆動回路６を介して計器本体１に供給し、この
計器本体１を駆動させる。ステップST4において、計器
本体１の指針の指示値を画像処理カメラ２で読み取り、
ステップST5で読み取った計測値（指示値）を規格値と
比較し、その差を求める。そして、計測値が規格値を含
む所定の範囲からずれているか否かを判断し、また所定
範囲外である場合にはステップST6に進み、所定範囲内
であればステップST7に進む。ステップST6では、ステッ
プST5で求めた差の大きさ及び差の正負を基準にして計
器１が所定の指示をするように前記CPU3内の増幅機能の
ゲインの大きさを増幅させてその結果をCPU3内のRAMに
書き込むと共に、演算結果に基づいてステップST3に進
み、駆動回路６を介して計器本体１を再度駆動させる。
また、ステップST5で計器本体１の指針が規格値を含む
所定の範囲内の目盛を指示すると、この目盛を指示させ
るために計器本体１に供給されている指示信号のゲイン
をCPU3内のRAMからE2PROM4に書き込む。ステップST8で
は所定の指示値（この場合0km/h、100km/hの２点）での
調整を行ったか否かの判断を行い、0km/hの指示のみに
ついて調整を行ったのであれば、ステップST2に戻り100
km/hの指示についての調整を行う。そして、所定の指示
値について調整をすべて行った後はステップST9で一連
の処理を終了する。 上記のように指示値データが設定されたE2PROM4を実
際の計器ユニットに適用した例を第３図に示し、その説
明を行う。CPU7は電源が投入されると、E2PROM4から第
１図において説明したゲインを読取り、その後、センサ
６からの検出信号を入力し、該検出信号の信号処理を行
うとともに、該検出信号の大きさに相当する目盛を指示
するようにCPU7からの出力信号のゲインを増減した後
に、駆動回路５を介して計器本体１が駆動される。 なおCPU7は第１図におけるCPU3の機能から画像処理シ
ステムのプログラムを除いたものは全て有している。Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In the drawing, reference numeral 1 denotes an instrument, 2 denotes an image processing camera which is a measuring camera for reading a display surface of the instrument 1, and 3 denotes an image processing system and adjustment. CPU having a program of system functions,
Reference numeral 4 denotes data for determining an amplification gain of an input signal of a CPU 7 described later so that a pointer of the meter 1 indicates a predetermined scale when an input signal of a specific size is supplied from the drive circuit 5 to the meter main body. E 2 PROM 5 is a drive circuit for driving the instrument 1. Next, the operation will be described with reference to FIG. First,
After the pointer is driven into the pointer shaft of the instrument body 1 and fixed, the instrument 1 is installed in front of the image processing camera 2. Then, in step ST1, the test start switch is turned on, and when the signal is input to the CPU 3, the RAM and the like in the CPU 3 are initialized. In step ST2, the instrument body 1 is set to a specific value, for example, 0 km
A signal for instructing / h, 100 km / h, etc. is set in the RAM in the CPU 3. In this case, 0 km / h is set when the process proceeds from step ST1 to step ST2, and 100 km / h is set when the process proceeds from step ST8. In step ST3, an instruction signal of a specific magnitude is amplified with a predetermined gain by an amplification function (amplifier) in the CPU 3 so that the pointer of the instrument main body 1 indicates a specific scale, and then the signal is transmitted through the drive circuit 6. To the instrument body 1 to drive the instrument body 1. In step ST4, the indicator value of the pointer of the meter main body 1 is read by the image processing camera 2, and
The measured value (indicated value) read in step ST5 is compared with a standard value, and the difference is obtained. Then, it is determined whether or not the measured value deviates from a predetermined range including the standard value. If the measured value is out of the predetermined range, the process proceeds to step ST6, and if it is within the predetermined range, the process proceeds to step ST7. In step ST6, the magnitude of the gain of the amplification function in the CPU 3 is amplified so that the meter 1 gives a predetermined instruction based on the magnitude of the difference and the sign of the difference obtained in step ST5, and the result is compared with the CPU 3. At the same time, the process proceeds to step ST3 based on the calculation result, and the instrument main body 1 is driven again via the drive circuit 6.
Further, when the pointer of the meter main body 1 indicates a scale within a predetermined range including the standard value in step ST5, the gain of the indicating signal supplied to the meter main body 1 for indicating the scale is obtained from the RAM in the CPU 3. Write to E 2 PROM4. In step ST8, it is determined whether or not adjustment has been performed at a predetermined instruction value (in this case, 2 points of 0 km / h and 100 km / h). Return to ST2 100
Adjust the km / h indication. Then, after all adjustments have been made for the predetermined instruction value, a series of processing ends in step ST9. An example in which the E 2 PROM 4 in which the indicated value data is set as described above is applied to an actual instrument unit is shown in FIG. 3 and will be described. When the power is turned on, the CPU 7 reads the gain described in FIG. 1 from the E 2 PROM 4, thereafter, inputs a detection signal from the sensor 6, performs signal processing of the detection signal, and increases the magnitude of the detection signal. After increasing or decreasing the gain of the output signal from the CPU 7 so as to indicate a scale corresponding to the above, the meter main body 1 is driven via the drive circuit 5. The CPU 7 has all the functions of the CPU 3 in FIG. 1 except for the program of the image processing system.
以上説明してきたようにこの発明によれば、その構成
を計器の指示値が特定の値になるように前記計器を駆動
せしめると共に、前記計器の表示面に対向配置された計
測用カメラによって前記指示値を読み取り、読取った値
が前記特定の値になるように補正をした後、RAMに書込
み、書込んだ値が前記特定の値を含む所定の範囲内に入
るまで前記操作を繰返し、所定の範囲内に入ったときに
前記RAMに書込まれた値をE2PROM4に書込むようにした計
器の指示値調整方法としたため、指示値の調整を短時間
に行え、しかも指示精度を向上させることができるとい
う効果が得られる。As described above, according to the present invention, the configuration is configured such that the instrument is driven so that the indicated value of the instrument becomes a specific value, and the indication is performed by the measuring camera disposed opposite to the display surface of the instrument. After reading the value and correcting the read value to be the specific value, writing the data into the RAM, repeating the above operation until the written value falls within a predetermined range including the specific value, Since the value written in the RAM is written into the E 2 PROM 4 when the value falls within the range, the indicated value can be adjusted in a short time, and the indicating accuracy can be improved. The effect that it can be obtained is obtained.
第１図はこの発明に係る計器の指示値調整方法の一実施
例を示す構成図、第２図は第１図の動作を説明するフロ
ーチャート、第３図は本発明によってデータが設定され
たE2PROMを用いて実際の計器ユニットを駆動した場合の
説明図である。 １……計器、２……計測用カメラ、3,7……CPU、４……
E2PROM。FIG. 1 is a block diagram showing an embodiment of a method for adjusting an indicated value of an instrument according to the present invention, FIG. 2 is a flowchart for explaining the operation of FIG. 1, and FIG. FIG. 4 is an explanatory diagram in a case where an actual instrument unit is driven using 2 PROM. 1 ... Instrument, 2 ... Measurement camera, 3,7 ... CPU, 4 ...
E 2 PROM.
フロントページの続き (56)参考文献 特開 昭63−98524（ＪＰ，Ａ) 特開 昭61−260121（ＪＰ，Ａ) 特開 昭63−265129（ＪＰ，Ａ) 特開 昭53−123974（ＪＰ，Ａ) 特表 昭62−501164（ＪＰ，Ａ) 実開 昭59−166127（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) G01D 3/00 G01D 18/00Continuation of front page (56) References JP-A-63-98524 (JP, A) JP-A-61-260121 (JP, A) JP-A-63-265129 (JP, A) JP-A-53-123974 (JP) , A) Tokuyo Sho 62-501164 (JP, A) Japanese Utility Model Showa 59-166127 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) G01D 3/00 G01D 18/00
Claims (1)
に前記計器を駆動せしめると供に、前記計器の表示面に
対向配置された計測用カメラ（２）によって前記指示値
を読み取り、読み取った計測値と規定値を比較して前者
が後者の範囲内か否かを判断し、範囲外の場合は、前記
計測値と前記規格値との差の大きさ及び差の正負を基準
にして、計測値が所定の指示をするようにCPU内の増幅
器のゲインを増幅させ、その結果をRAMに書き込むと共
に、前記計器を再度駆動させて、前記計測値が前記規格
値の範囲内に入るまで上記の動作を繰り返し、前記規定
値の範囲内に入った場合、前記指示値のゲインを前記RN
AからE2PROM（４）に書き込むようにしたことを特徴と
する計器の指示値調整方法。An instrument (1) is driven so that an indicated value of the instrument (1) becomes a specific value, and the indicated value is measured by a measuring camera (2) arranged opposite to a display surface of the instrument. Read, determine whether the former is within the latter range by comparing the read measured value with the specified value, and if not, determine the magnitude of the difference between the measured value and the standard value and the sign of the difference. As a reference, the gain of the amplifier in the CPU is amplified so that the measured value indicates a predetermined instruction, and the result is written into RAM, and the meter is driven again, so that the measured value falls within the range of the standard value. The above operation is repeated until the value falls within the range of the specified value.
A method for adjusting the indicated value of an instrument, wherein the data is written from A to E 2 PROM (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1137384A JP2788287B2 (en) | 1989-06-01 | 1989-06-01 | How to adjust the indicated value of the instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1137384A JP2788287B2 (en) | 1989-06-01 | 1989-06-01 | How to adjust the indicated value of the instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH034120A JPH034120A (en) | 1991-01-10 |
| JP2788287B2 true JP2788287B2 (en) | 1998-08-20 |
Family
ID=15197429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1137384A Expired - Fee Related JP2788287B2 (en) | 1989-06-01 | 1989-06-01 | How to adjust the indicated value of the instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2788287B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53123974A (en) * | 1977-04-05 | 1978-10-28 | Kanto Seiki Co | Circuit for analog electric meter |
| DE3446248A1 (en) * | 1984-12-19 | 1986-06-19 | Robert Bosch Gmbh, 7000 Stuttgart | SENSOR FOR MEASURING PHYSICAL SIZES AND METHOD FOR ADJUSTING THE SENSOR |
| JPH07117427B2 (en) * | 1985-05-15 | 1995-12-18 | 株式会社明電舎 | Measuring accuracy of measuring instruments |
| JPS6398524A (en) * | 1986-10-15 | 1988-04-30 | Kubota Ltd | Model parameter setting method and device for digital scales |
| JPS63265129A (en) * | 1987-04-23 | 1988-11-01 | Sharp Corp | Picture-element checking system of display device |
-
1989
- 1989-06-01 JP JP1137384A patent/JP2788287B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH034120A (en) | 1991-01-10 |
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