JPS62287165A - Dc voltage detecting circuit - Google Patents
Dc voltage detecting circuitInfo
- Publication number
- JPS62287165A JPS62287165A JP13140686A JP13140686A JPS62287165A JP S62287165 A JPS62287165 A JP S62287165A JP 13140686 A JP13140686 A JP 13140686A JP 13140686 A JP13140686 A JP 13140686A JP S62287165 A JPS62287165 A JP S62287165A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- switching noise
- values
- detection circuit
- converter
- 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.)
- Granted
Links
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
- G01R19/0053—Noise discrimination; Analog sampling; Measuring transients
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野〕
本発明は直流電圧検出回路、特に直流安定化電源の出力
電圧を測定する直流電圧検出回路に関する。Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a DC voltage detection circuit, and particularly to a DC voltage detection circuit that measures the output voltage of a DC stabilized power supply.
一般に直流安定化電源の出力電圧にはリップルを圧のほ
かにいわゆるスイッチングノイズが重畳されている。こ
のような直流電圧をＡＤコンバータなどによって検出す
るとき上記のスイッチングノイズが誤って検出され、正
確な電圧値を測定できないことがある。In general, the output voltage of a DC stabilized power supply includes so-called switching noise in addition to ripples. When such a DC voltage is detected by an AD converter or the like, the above switching noise may be erroneously detected, making it impossible to measure an accurate voltage value.
このようなスイッチングノイズを除去するために、直流
安定化電源の出力端にコンデンサを接続する方法がある
が、この方法では出力電圧の波形が歪んでしまうので、
これを正しく測定することができないという欠点がある
。In order to remove such switching noise, there is a method of connecting a capacitor to the output terminal of a DC stabilized power supply, but this method distorts the output voltage waveform.
The disadvantage is that this cannot be measured correctly.
本発明が解決しようとする問題点、換言すれば本発明の
目的はスイッチングノイズの測定値全電圧データのなか
から除くようにして上記の欠点を改良した直流電圧検出
回路を提供することにある。The problem to be solved by the present invention, in other words, the purpose of the present invention is to provide a DC voltage detection circuit which improves the above-mentioned drawbacks by removing the measured value of switching noise from the total voltage data.
本発明の直流電圧検出回路は、直流安定化電源の出力電
圧を測定する直流電圧検出回路において、前記直流電圧
を検知し、あらかじめ定めたサンプリング期間に前記直
流電圧を０回サンプリングしたｎ個のディジタル信号ｆ
ｔｎ個の電圧値として送出するＡＤコンバータと、前記
ｎ１固の電圧１直を入力して比較し、最大値および最小
値を除いたｎ −２個の電圧値を相加平均して電圧デー
タとするマイクロプロセッサとを有して構成される。The DC voltage detection circuit of the present invention is a DC voltage detection circuit that measures the output voltage of a DC stabilized power supply. signal f
The AD converter that sends out tn voltage values is input and compared with the n1 voltages, and the voltage data is obtained by arithmetic averaging of n-2 voltage values excluding the maximum and minimum values. and a microprocessor.
以下、本発明による直流電圧検出回路について図面を参
照しながら説明する。Hereinafter, a DC voltage detection circuit according to the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示すブロック図である。同
図において被測定電圧Ｅ１はオペアンプ１を介してＡＤ
コンバータ２へＶ＝倍信号して入力される。ＡＤコンバ
ータ２は後述のマイクロプロセッサ３の指示に従って上
記の被測定電圧ＥｌをＡＤ変換してディジタルな電圧値
り、を送出する。マイクロプロセッサ３はデータバス５
を介して上記の電圧値Ｄ１ を入力し、あらかじめ定め
られた手１［に従って電圧値Ｄ ｉを相加平均して電圧
データを算出する（後述する。）。基準電圧発生回路４
は基準電圧Ｅｏを上記のＡＤコンバータ２のＶ ｎＥＰ
信号として送出する。FIG. 1 is a block diagram showing one embodiment of the present invention. In the same figure, the voltage to be measured E1 is applied to AD via operational amplifier 1.
The V=multiplied signal is input to the converter 2. The AD converter 2 AD converts the voltage to be measured El according to instructions from the microprocessor 3, which will be described later, and sends out a digital voltage value. Microprocessor 3 is data bus 5
The above-mentioned voltage value D1 is inputted via a predetermined method 1, and voltage data is calculated by arithmetic averaging the voltage values D1 (described later). Reference voltage generation circuit 4
is the reference voltage Eo of the above AD converter 2.
Send as a signal.
このような直流電圧検出回路においてＡＤ：Ｍ／バータ
２はマイクロプロセッサ３のＰＩＯｉ子が送出するＣ８
信号を入力し、被測定′電圧Ｅ、のサンプリングを開始
する。そして同じくＲＤ端子が送出するＯＥ＠号を入力
し、それに従って電圧値り、を送出する。In such a DC voltage detection circuit, the AD:M/verter 2 receives the C8 output from the PIOi child of the microprocessor 3.
Input the signal and start sampling the voltage E to be measured. Similarly, the OE@ signal sent from the RD terminal is input, and the voltage value is sent out accordingly.
第２図は本実施例の動作を説明する波形図である。同図
において被測定電圧Ｅ１にはリップル電圧に伴なう大き
なうねりと共にスイッチングノイズＮ、が１（畳されて
いる。ここでｃｓ係号によるサンプリング期間は直流安
定化電源のスイッチング周期と同じかまたは若干短かく
設定する。そし−Ｃ上記のサンプリング期間の間にＯＥ
倍信号従って板数個の電圧値Ｄ＋ （同図ではｉ ＝
ｌ〜６）をサンプリングする。FIG. 2 is a waveform diagram illustrating the operation of this embodiment. In the same figure, the voltage to be measured E1 has large undulations due to ripple voltage as well as switching noise N, which is multiplied by 1.Here, the sampling period by CS coding is the same as the switching period of the DC stabilized power supply. Set it slightly shorter.Then, during the above sampling period, OE
Therefore, the voltage value D+ of several plates (in the figure, i =
1 to 6).
マイクロプロセッサ３は上記の各電圧値Ｄｌを比較し、
最大値と最小値を除いたものを相加平均して電圧データ
とする。（第２図ではＤｌ とＤｓを除き（Ｄ２ ＋Ｄ
３ ＋Ｄ４ ＋Ｄａ ）／４を電圧ダークとする。）
〔発明の効果〕
以上、詳細に訝、ＥＡシたようＶＣ本発明の直流電圧検
出回路によればスイッチングノイズをサンプリングした
電圧値を常に除去できるので、スイッチングノイズに影
響されずに正確な電圧デーｊｌ（平均埴）を検出するこ
とができるという効果がある。The microprocessor 3 compares each of the above voltage values Dl,
The voltage data is obtained by taking the arithmetic average of the values excluding the maximum and minimum values. (In Figure 2, excluding Dl and Ds (D2 + D
3 +D4 +Da)/4 is the voltage dark. ) [Effects of the Invention] As mentioned above, the DC voltage detection circuit of the present invention can always remove voltage values sampled from switching noise, so accurate voltage can be obtained without being affected by switching noise. This has the effect of being able to detect data jl (average value).
さらにスイッチングノイズを除去するためにコンデンサ
などを従続する必要がないので、被測定電圧が歪むこと
はない。したがって測定結果の信頼度を向上するという
効果もある。Furthermore, since there is no need to follow a capacitor or the like to remove switching noise, the voltage to be measured will not be distorted. Therefore, there is also the effect of improving the reliability of measurement results.
第１図は本発明による直流電圧検出回路の一実施例を示
すブロック図、第２図は動作を説明する波形図である。
２・・・・・・ＡＤコンバータ、３・・川・マイクロプ
ロセッサ。
代理人 弁理士 内 原 町 ・ゝ＼−ン
′：Ａ １ 口
１−一一一才へ°アジア″ Ｅｒ−−−−
＃；判定電圧２−−−−ＡＤコンバータ Ｄ
、−−−−一電凪イ直３−−−− フイクロプ°口七、
７ブ
ａ−−−基ギ常圧姪生回路
５−一一−テ゛−クハス
第２ 図FIG. 1 is a block diagram showing an embodiment of the DC voltage detection circuit according to the present invention, and FIG. 2 is a waveform diagram explaining the operation. 2...AD converter, 3... River/microprocessor. Agent Patent Attorney Uchihara Town ・ゝ\-n':A 1 口 1-111年へ°Asia'' Er------
#; Judgment voltage 2---AD converter D
, ----- Ichiden Nagii Nao 3 ----- Fiklop ° Kuchi 7,
7B a---Basic Normal Pressure Generating Circuit 5-11-Task Lot Figure 2
Claims (1)
において、 前記直流電圧を検知し、あらかじめ定めたサンプリング
期間に前記直流電圧をｎ回サンプリングしたｎ個のディ
ジタル信号をｎ個の電圧値として選出するＡＤコンバー
タと、 前記ｎ個の電圧値を入力して比較し、最大値および最小
値を除いたｎ−２個の電圧値を相加平均して電圧データ
とするマイクロプロセッサとを有することを特徴とする
直流電圧検出回路。[Claims] In a DC voltage detection circuit that measures the output voltage of a DC stabilized power supply, the DC voltage is detected, and n digital signals obtained by sampling the DC voltage n times during a predetermined sampling period are converted into n digital signals. An AD converter that selects the n voltage values as the voltage values, and a microcontroller that inputs and compares the n voltage values, and calculates the arithmetic average of n-2 voltage values excluding the maximum and minimum values to obtain voltage data. A DC voltage detection circuit comprising a processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61131406A JPH0668515B2 (en) | 1986-06-05 | 1986-06-05 | DC voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61131406A JPH0668515B2 (en) | 1986-06-05 | 1986-06-05 | DC voltage detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62287165A true JPS62287165A (en) | 1987-12-14 |
| JPH0668515B2 JPH0668515B2 (en) | 1994-08-31 |
Family
ID=15057227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61131406A Expired - Lifetime JPH0668515B2 (en) | 1986-06-05 | 1986-06-05 | DC voltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0668515B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011087365A (en) * | 2009-10-14 | 2011-04-28 | Daikin Industries Ltd | Power conversion device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5298756B2 (en) * | 2008-10-15 | 2013-09-25 | 株式会社オートネットワーク技術研究所 | Vehicle power supply |
| JP2015061244A (en) * | 2013-09-20 | 2015-03-30 | 日本特殊陶業株式会社 | Duty ratio acquisition device, load drive device, and load drive system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59104299U (en) * | 1982-12-28 | 1984-07-13 | 富士電機株式会社 | data processing equipment |
-
1986
- 1986-06-05 JP JP61131406A patent/JPH0668515B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59104299U (en) * | 1982-12-28 | 1984-07-13 | 富士電機株式会社 | data processing equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011087365A (en) * | 2009-10-14 | 2011-04-28 | Daikin Industries Ltd | Power conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0668515B2 (en) | 1994-08-31 |
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