JPH04203902A - Potentiometer device - Google Patents

Potentiometer device

Info

Publication number
JPH04203902A
JPH04203902A JP2336266A JP33626690A JPH04203902A JP H04203902 A JPH04203902 A JP H04203902A JP 2336266 A JP2336266 A JP 2336266A JP 33626690 A JP33626690 A JP 33626690A JP H04203902 A JPH04203902 A JP H04203902A
Authority
JP
Japan
Prior art keywords
voltage
potentiometer
detection
circuit
comparator
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
Application number
JP2336266A
Other languages
Japanese (ja)
Other versions
JPH0748041B2 (en
Inventor
Hiroyuki Takeuchi
宏之 竹内
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.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
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 Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP2336266A priority Critical patent/JPH0748041B2/en
Publication of JPH04203902A publication Critical patent/JPH04203902A/en
Publication of JPH0748041B2 publication Critical patent/JPH0748041B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Adjustable Resistors (AREA)

Abstract

PURPOSE:To enable detection of disconnection of a wiring, loosening of fitting thereof and further abnormality of a driving system, in addition to detection of a position being proper for a potentiometer, by providing a circuit for detecting the disconnection by a comparator having a comparison voltage set, and others. CONSTITUTION:A detection voltage V obtained from a common terminal Y of a potentiometer 1 for detection is inputted to a comparator 6 and compared with a voltage A set by a trimmer 4, and position adjustment of a position A can be executed on the basis of fluctuation of the voltage A in relation to the voltage V. In detection of disconnection of a wiring of the meter 1, a predictive detection voltage C at the time of disconnection of each wire is set as a comparison voltage, the voltage C and the voltage V are compared by a comparator 9 and thereby abnormality is detected. As for a failure of a driving system, loosening of fitting of the potentiometer, etc., moreover, an output signal anot equal to b or a=b is obtained through sample hold circuits 10 and 11 and a comparator 12, this output signal and a drive signal ON or a nondrive signal OFF taken in from a driving system control element are inputted to logic circuits 14 and 13, the presence or absence of abnormality is judged thereby, and thus the abnormality can be detected.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 本発明は位置゛検出回路の分野で利用される。[Detailed description of the invention] (b) Industrial application field INDUSTRIAL APPLICATION This invention is utilized in the field of a position detection circuit.

本発明はポテンショメータ装置に関し、詳しくはX線透
視撮影台などの駆動系に関着されたポテンショメータの
位置検出回路に関し、とくにその付加的な異常検出回路
に一関する。
The present invention relates to a potentiometer device, and more particularly to a position detection circuit for a potentiometer connected to a drive system of an X-ray fluoroscopy table, etc., and particularly to an additional abnormality detection circuit therefor.

(ロ)従来技術 従来より位置検出手段として、リミットスイッチ及び切
片又は水銀スイッチ等が用いられ、これらの各スイッチ
の調整はそれぞれの位置で動作するようにスイッチの位
置又は切片を動かして調整する必要がある。
(B) Prior Art Conventionally, limit switches and switches or mercury switches have been used as position detection means, and each of these switches must be adjusted by moving the switch position or switch so that it operates at each position. There is.

(ハ)発明が解決しようとする課題 前記した位置検出手段では、位置の調整を1つ1つリミ
ット部材を動かして調整しなければならないので手間が
かかり、検出位置の点数骨だけスイッチ、切片等がいる
ので、コスト高である。
(c) Problems to be Solved by the Invention With the above-mentioned position detection means, each position must be adjusted by moving the limit member one by one, which is time-consuming, and requires the use of switches, cutters, etc. for each detection position. Because of this, the cost is high.

また、設置室が狭いなどにより動作の制限が容易でない
Furthermore, it is difficult to restrict the operation because the installation room is narrow.

そこで、位置検出手段としてポテンショメータが使われ
るようになり、停止な、いしリミット位置の調整は比較
回路内の比較電圧をトリマないし可変抵抗により変化さ
せることで容易に行える。
Therefore, potentiometers have come to be used as position detection means, and the stop or limit position can be easily adjusted by changing the comparison voltage in the comparison circuit using a trimmer or variable resistor.

また、比較電圧の範囲をある程度確保しておくことによ
り、設置室の大きさによる制限もトリマを調整するだけ
で行える。
Furthermore, by securing a certain range of comparison voltages, restrictions due to the size of the installation room can be made by simply adjusting the trimmer.

ところが、従来のポテンショメータ検出回路では1.ポ
テンショメータの各端子への配線が断線した場合、ポテ
ンショメータの取付けのゆるみによる不具合い、さらに
はポテンショメータには異常がなく駆動系に異常があり
その原因がリレーの溶着等であることなどを検出できな
い。
However, in the conventional potentiometer detection circuit, 1. If the wiring to each terminal of the potentiometer is disconnected, it cannot be detected that there is a problem due to loose installation of the potentiometer, or that the potentiometer is normal but there is an abnormality in the drive system and the cause is welding of the relay, etc.

本発明の目的は、ポテンショメータ本来の位置検出に限
らず、配線の断線、取付けのゆるみ、さらには駆動系の
異常検出も行なう、ポテンショメータ検出回路を提供す
ることである。
SUMMARY OF THE INVENTION An object of the present invention is to provide a potentiometer detection circuit that not only detects the original position of a potentiometer but also detects disconnection of wiring, looseness of attachment, and abnormalities in the drive system.

(ニ)課題を解決するための手段 前記した目的は、駆動体の位置を検出するポテンショメ
ータ装置において、ポテンショメータの配線が断線した
とき検出予知できる比較電圧が設定された比較器により
断線を検出する回路と、ポテンショメータ検出電圧を2
つの異なるクロック単位で保持するそれぞれのサンプル
ホールド回路と、両ホールド回路の各出力電圧間に変化
状態を検出する検出回路と、駆動体の駆動信号と前記検
出回路の出力を論理判断し駆動系の異常或いはポテンシ
ョメータの取付は不具合いを検出する回路とを具備する
ことにより、達成される。
(d) Means for Solving the Problem The above object is a circuit that detects a disconnection in a potentiometer device that detects the position of a driving body using a comparator that is set with a comparison voltage that can predict when the wiring of the potentiometer is disconnected. and the potentiometer detection voltage is 2
sample and hold circuits that hold data in units of two different clocks, a detection circuit that detects changes between the output voltages of both hold circuits, and a drive system that logically judges the drive signal of the drive body and the output of the detection circuit. Fault or potentiometer installation is accomplished by providing fault detection circuitry.

(ホ)作用 位置検出にポテンショメータを用いて、その検出電圧を
比較回路ないしコンパレータに入力し、その回路内で、
各リミット位置・ノチに相当する電圧と比較し、検出電
圧が比較電圧に対して、大きくまたは小さくなった時に
、所定の位置に到達したと判断し、その旨の出力信号が
検出される。
(E) Use a potentiometer to detect the position of action, input the detected voltage to a comparison circuit or comparator, and in that circuit,
It is compared with the voltage corresponding to each limit position/notch, and when the detected voltage becomes larger or smaller than the comparison voltage, it is determined that a predetermined position has been reached, and an output signal to that effect is detected.

この場合、リミットないし停止位置の調整は、比較回路
内の比較電圧をトリマ(可変抵抗)により、変化させる
ことで容易に行える。 また、比較電圧の範囲をある程
度確保しておくことにより、設置室の大きさによる制限
もトリマを調整するだけで行える。
In this case, the limit or stop position can be easily adjusted by changing the comparison voltage in the comparison circuit using a trimmer (variable resistor). Furthermore, by securing a certain range of comparison voltages, restrictions due to the size of the installation room can be made by simply adjusting the trimmer.

以上が従来より行われているポテンショメータの検出回
路の一般的な作用である。
The above is the general operation of a conventional potentiometer detection circuit.

本発明では、一般的な作用に加えて、ポテンショメータ
検出電圧を時間的に管理し、同時に駆動系に対する駆動
信号(ON、0FF)を取り込んで、駆動信号がONな
のにこれに関着ししているボテ゛ンショメータの検出電
圧が変化しないないならば、ポテンショメータが取付け
ゆるみなどにより外れていると判断し、また逆に駆動信
号がOFFなのに検出電圧が変化している場合には該駆
動部にかかるリレーの溶着などが原因でその駆動部が動
作していると判断してそれぞれ異常検出し、さらには比
較電圧に、ボテフシ2メータが断線したときは+もしく
は−の電圧に振り切る予知検出電圧を設定しておくこと
によりポテンショメータ配線の断線を検出する。
In addition to the general function, the present invention manages the potentiometer detection voltage over time, and at the same time takes in the drive signal (ON, 0FF) for the drive system, and is related to this even though the drive signal is ON. If the detection voltage of the potentiometer does not change, it is determined that the potentiometer has come off due to loose installation, etc., and conversely, if the detection voltage changes even though the drive signal is OFF, the relay connected to the drive unit is welded. It is determined that the drive unit is operating due to such reasons, and an abnormality is detected.Furthermore, the comparison voltage is set to a predictive detection voltage that changes to a + or - voltage when the 2 meters are disconnected. This detects a disconnection in the potentiometer wiring.

(へ)実施例 本発明の好適な実施例は図面に基づいて説明される。(f) Example A preferred embodiment of the invention will be explained based on the drawings.

第1図はその1実施例を示した回路図である。FIG. 1 is a circuit diagram showing one embodiment thereof.

検出部に取付られた検出用ポテンショメータ1を回路に
接続し、端子Xを+15v、端子Zを一15Vとし接続
、コモン端子Yより検出電圧(約+10v〜−10Vの
範囲で変化)を得る。 そのコモン端子Yの出力をノイ
ズフィルタ2を通して電圧Vとして比較器6.7.9、
サンプルホールド回路10X 11に入力する。
The detection potentiometer 1 attached to the detection part is connected to the circuit, the terminal X is connected to +15V, the terminal Z is connected to -15V, and the detection voltage (varies in the range of about +10V to -10V) is obtained from the common terminal Y. The output of the common terminal Y is passed through the noise filter 2 and set as the voltage V by the comparator 6.7.9,
Input to sample hold circuit 10X11.

まず、リミット位置の出力回路より説明する。First, the limit position output circuit will be explained.

検出電圧Vは、比較器A(6)に入力され、トリマA(
4)にて設定された電圧Aと比較され、検出電圧■が設
定電圧Aより大きい時に、位置A到達の信号が比較回路
Aより出力され、そしてこの出力は、トリマA(4)に
より、設定電圧を変化させ、この電圧Aが検出電圧■に
対して上下することにより位tAの位置調整ができる。
The detection voltage V is input to the comparator A (6), and the trimmer A (
4), and when the detected voltage ■ is larger than the set voltage A, a signal indicating that the position A has been reached is output from the comparator circuit A, and this output is sent to the set voltage by the trimmer A (4). By changing the voltage and increasing or decreasing the voltage A with respect to the detection voltage (2), the position can be adjusted by tA.

また、位置Bも同様であり、検出電圧Vと設定電圧Bが
比較器C(7)に入力され、前者が大きければ、位置B
到達信号が出力される。
The same applies to position B, and the detected voltage V and set voltage B are input to comparator C (7), and if the former is larger, position B
An arrival signal is output.

次に3つの異常態様を検出する回路構成について説明す
る。
Next, a circuit configuration for detecting three abnormalities will be described.

まず、異常A、つまりポテンショメータ配線の断線を検
出するには、比較電圧に、ポテンショメータ1の各線が
断線した時の予知検出電圧Cを設定し、この電圧と検出
電圧Vを比較器C(9)で比較し、各電圧がほぼ等しい
時に出力信号が得られるようにすることによって異常を
検出する。
First, to detect abnormality A, that is, disconnection of the potentiometer wiring, set the predictive detection voltage C when each wire of potentiometer 1 is disconnected as the comparison voltage, and compare this voltage and the detection voltage V with the comparator C (9). An abnormality is detected by comparing the two voltages and obtaining an output signal when each voltage is approximately equal.

な、お、このような予知検出電圧Cとは、図示例につい
て端子X及びYの配線では一15Vで端子Zの配線では
+15Vであり、とくに端子Yの配線は例えばメガオー
ムの高抵抗3により、−15■に接続されているので、
Y線が仮に断線しても検出できる。
Incidentally, in the illustrated example, such predictive detection voltage C is -15V for the wiring of terminals X and Y, and +15V for the wiring of terminal Z, and in particular, the wiring of terminal Y has a high resistance 3 of, for example, megaohm. Since it is connected to -15■,
Even if the Y line becomes disconnected, it can be detected.

次に、異常態様B(駆動系の故障など)、異常態様C(
ポテンショメータ取付けのゆるみなど)の検出について
説明する。
Next, abnormality mode B (drive system failure, etc.), abnormality mode C (
This section explains how to detect loose potentiometer mounting, etc.

検出電圧Vをサンプルホールド回1?8A(10)、同
B(11)によりある決められた異なった時間(CLO
CK  A、B)ごとにそれぞれ交互に電圧Vをホール
ドする。 そして、比較器D(12)にてそれぞれホー
ルドされた電圧a、bを比較し、a#bもしくはa=b
の出力信号を得て、この出力信号と、駆動系制御部から
取り込んだ駆動信号ONないし非駆動信号OFFとが論
理回路14.13に入力されて異常の有無が4判断され
る。
The detection voltage V is sampled and held for a predetermined different time (CLO
The voltage V is held alternately for each of CK A and B). Then, the comparator D (12) compares the held voltages a and b, and a#b or a=b
This output signal and the drive signal ON or non-drive signal OFF taken in from the drive system control section are input to the logic circuit 14.13, and the presence or absence of an abnormality is determined.

A N D回路13では停止中と電圧a≠bのANDを
取り、駆動信号がOFFであるのにポテンショメータの
出力が変化していると判断すれば、駆動部にかかるリレ
ーの溶着があるとして異常出力信号が得られる。
The A N D circuit 13 performs an AND operation between stopped and voltage a≠b, and if it determines that the output of the potentiometer is changing even though the drive signal is OFF, it is determined that the relay connected to the drive unit is welded and is abnormal. An output signal is obtained.

また、AND回路14では駆動部の動作中とホールド電
圧a’qb (これはCLOCK  A、Bの間で変化
する電圧■の変化量が少ない時)のANDを取り、駆動
信号がONであるのにポテンショメータの出力に変化が
ないと判断すると、ポテンショメータのゆるみ等がある
として異常を示す信号が出力される。
In addition, the AND circuit 14 performs an AND operation of the drive section operating state and the hold voltage a'qb (this is when the amount of change in the voltage ■ that changes between CLOCK A and CLOCK B is small), and determines whether the drive signal is ON or not. If it is determined that there is no change in the output of the potentiometer, a signal indicating an abnormality is output, indicating that the potentiometer is loose or the like.

(ト)効果 本発明によれば、リミット位置のtll整がトリマを動
かすだけで8昌に行えるほかに、駆動部にかかるリレー
の溶着、ポテンショメータ配線の断線などの異常検出が
行なえる。
(G) Effects According to the present invention, not only can Tll adjustment of the limit position be performed in eight ways just by moving the trimmer, but also abnormalities such as welding of the relay connected to the drive section and disconnection of the potentiometer wiring can be detected.

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

第1図は本発明の1実施例を示した回路図である。 1はポテンショメータ、4と5はトリマないし可変抵抗
、6と7と9と12は比較器、10と11はサンプルホ
ールド回路、13と14はA N D回路である。
FIG. 1 is a circuit diagram showing one embodiment of the present invention. 1 is a potentiometer, 4 and 5 are trimmers or variable resistors, 6, 7, 9 and 12 are comparators, 10 and 11 are sample and hold circuits, and 13 and 14 are A N D circuits.

Claims (1)

【特許請求の範囲】[Claims] 1.駆動体の位置を検出するポテンショメータ装置にお
いて、ポテンショメータの配線が断線したとき検出予知
できる比較電圧が設定された比較器により断線を検出す
る回路と、ポテンショメータ検出電圧を2つの異なるク
ロック単位で保持するそれぞれのサンプルホールド回路
と、両ホールド回路の各出力電圧間に変化状態を検出す
る検出回路と、駆動体の駆動信号と前記検出回路の出力
を論理判断し駆動系の異常或いはポテンショメータの取
付け不具合いを検出する回路とを具備していることを特
徴とする、ポテンショメータ装置。
1. In a potentiometer device that detects the position of a driving body, there is a circuit that detects a disconnection using a comparator that is set with a comparison voltage that can predict when the wiring of the potentiometer is disconnected, and a circuit that maintains the potentiometer detection voltage in two different clock units. A sample and hold circuit, a detection circuit that detects changes in the output voltages of both hold circuits, and a logic judgment between the drive signal of the drive body and the output of the detection circuit to detect abnormalities in the drive system or malfunctions in the potentiometer installation. A potentiometer device, comprising: a detection circuit.
JP2336266A 1990-11-29 1990-11-29 Potentiometer device Expired - Lifetime JPH0748041B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2336266A JPH0748041B2 (en) 1990-11-29 1990-11-29 Potentiometer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2336266A JPH0748041B2 (en) 1990-11-29 1990-11-29 Potentiometer device

Publications (2)

Publication Number Publication Date
JPH04203902A true JPH04203902A (en) 1992-07-24
JPH0748041B2 JPH0748041B2 (en) 1995-05-24

Family

ID=18297338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2336266A Expired - Lifetime JPH0748041B2 (en) 1990-11-29 1990-11-29 Potentiometer device

Country Status (1)

Country Link
JP (1) JPH0748041B2 (en)

Also Published As

Publication number Publication date
JPH0748041B2 (en) 1995-05-24

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