JPH0370579A - Disconnection detecting apparatus - Google Patents

Disconnection detecting apparatus

Info

Publication number
JPH0370579A
JPH0370579A JP20749989A JP20749989A JPH0370579A JP H0370579 A JPH0370579 A JP H0370579A JP 20749989 A JP20749989 A JP 20749989A JP 20749989 A JP20749989 A JP 20749989A JP H0370579 A JPH0370579 A JP H0370579A
Authority
JP
Japan
Prior art keywords
disconnection
noise
counting
cable
generated
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
JP20749989A
Other languages
Japanese (ja)
Other versions
JP2815185B2 (en
Inventor
Katsuyuki Komatsu
小松 克行
Toshiyuki Edakawa
敏之 枝川
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.)
Ito Co ltd
Original Assignee
Ito 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 Ito Co ltd filed Critical Ito Co ltd
Priority to JP20749989A priority Critical patent/JP2815185B2/en
Publication of JPH0370579A publication Critical patent/JPH0370579A/en
Application granted granted Critical
Publication of JP2815185B2 publication Critical patent/JP2815185B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Electrotherapy Devices (AREA)

Abstract

PURPOSE:To accurately discriminate the noise due to disconnection and other noise by providing a judging means counting the number of noises and outputting a stop signal at the point of time when the counting result becomes larger than a predetermined reference value and stopping the operation of electric machinery on the basis of the stopping signal outputted from a count means. CONSTITUTION:A counting control part 10 judges that disconnection is generated in a cable, a power supply cable or a main body 1 when a counting result is equal to or more than a number-of-time set value 11 to supply a disconnection signal to a drive part 13. When the disconnection signal is supplied to the drive part 13, a buzzer 14 is driven and an opening and closing switch 15 becomes closed. On the basis of this state, a user judges the generation of disconnection. At this time, since discharge is generated when the cable 2 is disconnected or ready to disconnect even if the user manually brings the opening and closing switch 15 to a closed state, the opening and closing switch 15 again becomes a closed state. As mentioned above, since the number of generated noises are counted and the generation of disconnection is judged when the count value is equal to or more than a predetermined value, for example, no malfunction to the single high level noise found in switching noise is generated.

Description

【発明の詳細な説明】 「産業上の利用分野」 この発明は、電気機器の配線の断線検出を行う断線検出
装置に係わり、特に断線検出の精度を向上させた断線検
出装置に関する。
DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a disconnection detection device for detecting disconnection in the wiring of electrical equipment, and more particularly to a disconnection detection device that improves the accuracy of disconnection detection.

「従来の技術」 医療用としての高周波電位治療器を初めとする電気機器
等において、その配線の断線を検出することは、危険な
事故を未然に防ぐということで非常に大切な技術であり
、これまで様々な方法が開発されている。
``Prior art'' Detecting disconnections in the wiring of medical high-frequency potential therapy devices and other electrical equipment is an extremely important technology in order to prevent dangerous accidents. Various methods have been developed so far.

「発明が解決しようとする課題」 ところで、上述した従来の方法にあっては、いずれにお
いてもスイッチングノイズに見られる単発、高レベルの
ノイズなどによって誤動作し易いなどの問題があり、正
確な断線検出が困難であるという問題があった。
``Problems to be Solved by the Invention'' However, all of the conventional methods described above have problems such as being prone to malfunction due to single-shot or high-level noise found in switching noise, and it is difficult to accurately detect disconnections. The problem was that it was difficult.

この発明はこのような事情に鑑みてなされたもので、断
線によるノイズとその他のノイズとを精度よく識別でき
る断線検出装置を提供することを目的としている。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wire breakage detection device that can accurately distinguish noise caused by wire breakage from other noises.

「課題を解決するための手段」 この発明は、電気機器の配線の断線や断線しかかりに時
に発生するノイズに基づいて断線検出を行う断線検出装
置において、前記ノイズを検出する検出手段と、この検
出手段によって検出されるノイズの数を計数し、その計
数結果が予め決定した基準値よりも大となった時点で停
止信号を出力する判定手段と、この計数手段から出力さ
れる停止信号に基づいて前記電気機器の動作を停止ささ
せる停止手段とを具備することを特徴とする。
``Means for Solving the Problems'' The present invention provides a disconnection detection device that detects a disconnection based on noise that sometimes occurs when the wiring of an electrical device is disconnected or about to disconnect, which includes a detection means for detecting the noise; a determining means for counting the number of noises detected by the detecting means and outputting a stop signal when the counting result becomes larger than a predetermined reference value, and a determining means for outputting a stop signal based on the stop signal output from the counting means. and stopping means for stopping the operation of the electrical equipment.

また、前記検出手段としてコイルを使用し、ノイズによ
って誘導起電力を発生させることで、該ノイズの検出を
行うようにしても良い。
Further, the noise may be detected by using a coil as the detection means and generating an induced electromotive force due to the noise.

「作用」 上記構成によれば、ノイズの発生回数を計数し、その計
数結果が予め決定した基準値を越えた場合に断線が生じ
たものと判定し、電気機器本体の動作を停止させる。
"Operation" According to the above configuration, the number of occurrences of noise is counted, and when the counted result exceeds a predetermined reference value, it is determined that a wire breakage has occurred, and the operation of the electrical equipment main body is stopped.

「実施例」 以下、この発明の詳細な説明するに先立ち、断線による
ノイズの発生について、高周波電位治療器における場合
を例に挙げて説明する。
"Example" Hereinafter, before giving a detailed explanation of the present invention, the occurrence of noise due to wire breakage will be explained using a case in a high frequency potential therapy device as an example.

第2図は高周波電位治療器を示す外観図であり、その本
体lの前面に高周波電圧を出力する出力端子1aが設け
られている。この出力端子1aから出力される電圧Va
は、ケーブル2を介して電極(電床)3に印加される。
FIG. 2 is an external view showing the high-frequency potential treatment device, and an output terminal 1a for outputting a high-frequency voltage is provided on the front surface of the main body 1. FIG. Voltage Va output from this output terminal 1a
is applied to the electrode (electric bed) 3 via the cable 2.

ここで、ケーブル2が図中で示す位置で断線あるいは断
線しかかつて、ギャップGpが生じ、その間の電位差が
vbであったとすると、このギャップ間の電圧vbは、
第3図に示すように、電圧Vaの上昇とともに増加する
。そして、放電電圧Vuを越えた時点で放電が起こり、
その瞬間、電極3の外被のインピーダンス4、環境イン
ピーダンス5、大地(アース)、本体lおよびケーブル
2からなる閉ループにパルス電流が流れる。この場合、
パルス電流が流れることによって、電圧vbは放電消滅
電圧V以下まで低下し、放電が停止する。そして、放電
が停止した直後から、再び、電圧vbは上昇して行き、
放電開始電圧Vuにまで達すると、再度放電が起こる。
Here, if the cable 2 was disconnected or disconnected at the position shown in the figure, and a gap Gp occurred, and the potential difference therebetween was vb, the voltage vb across this gap is
As shown in FIG. 3, it increases as the voltage Va increases. Then, when the discharge voltage Vu is exceeded, a discharge occurs,
At that moment, a pulsed current flows in a closed loop consisting of the impedance 4 of the outer jacket of the electrode 3, the environmental impedance 5, the earth, the body 1 and the cable 2. in this case,
As the pulse current flows, the voltage vb decreases to below the discharge extinction voltage V, and the discharge stops. Immediately after the discharge stops, the voltage vb rises again,
When the discharge starting voltage Vu is reached, discharge occurs again.

以後、電圧Vaの出力が停止するまで同様の放電が繰り
返され、その都度、パルス電流が閉ループ上を流れ、高
周波が発生する。このように、断線による放電が起こる
ことによって、閉ループ上のどこからでも高周波が発生
し、周囲に輻射ノイズの影響を与えることになる。
Thereafter, similar discharges are repeated until the output of the voltage Va stops, and each time a pulse current flows in a closed loop and a high frequency is generated. In this way, when a discharge occurs due to a disconnection, high frequency waves are generated from anywhere on the closed loop, and this causes the influence of radiated noise on the surrounding area.

ここで、放電回数nは、次式より求めることができる。Here, the number of discharges n can be obtained from the following equation.

n= 4−x (V a wax/ΔV)Xfこの場合
、ΔVは放電開始電圧Vu−放電消滅電圧Vであり、r
は周波数である。
n = 4-x (V a wax / ΔV)Xf In this case, ΔV is the discharge starting voltage Vu - the discharge extinction voltage V, and r
is the frequency.

次に、上述した放電によるノイズの発生原理を踏まえな
がらこの発明による実施例について説明する。
Next, an embodiment according to the present invention will be described based on the above-described principle of noise generation due to discharge.

第1図はこの発明の一実施例である断線検出装置を示す
ブロック図である。この図において、6はケーブル2の
断線により発生するノイズを検出するためのピックアッ
プコイルである。このピックアップコイル6は、図示の
ように、ケーブル2に通しである。この場合、ケーブル
2に対するピックアップコイル6の位置は任意である。
FIG. 1 is a block diagram showing a disconnection detection device which is an embodiment of the present invention. In this figure, reference numeral 6 denotes a pickup coil for detecting noise generated due to disconnection of the cable 2. This pickup coil 6 is passed through the cable 2 as shown. In this case, the position of the pickup coil 6 with respect to the cable 2 is arbitrary.

7はピックアップコイル6に誘起する誘導起電力のうち
の高周波成分のみを抽出するフィルタ(HP F :バ
イパスフィルタ)である。8はレベル設定部であり、フ
ィルタ7から出力されるノイズのうち、予め設定した設
定値以上のものを抽出し、出力する。この場合、設定値
は設定器9によって任意に設定できるようになっている
。IOはレベル設定部8から出力されるノイズを計数す
るとともに、その計数結果に基づいて駆動部13に断線
信号を供給する計数制御部である。この場合、計数回数
は回数設定器11によって任意に設定でき、計数期間は
期間設定器12によって任意に設定できるようになって
いる。そして、これらを設定することによってその設定
期間内に設定回数を越えるノイズが供給された時点で断
線信号を出力する。13は駆動部であり、計数制御部I
Oから出力される断線信号を入力し、ブザー14を鳴ら
すとともに開閉スイッチ15を開状態にする。開閉スイ
ッチ15は本体1の表面上に取り付けられており、手動
によって開閉できるようにもなっている。
7 is a filter (HP F : bypass filter) that extracts only the high frequency component of the induced electromotive force induced in the pickup coil 6. Reference numeral 8 denotes a level setting section, which extracts and outputs noise that exceeds a preset value from among the noise output from the filter 7. In this case, the setting value can be arbitrarily set using the setting device 9. IO is a counting control section that counts the noise output from the level setting section 8 and supplies a disconnection signal to the drive section 13 based on the counting result. In this case, the number of counts can be arbitrarily set using the number setting device 11, and the counting period can be arbitrarily set using the period setting device 12. By setting these, a disconnection signal is output when noise is supplied more than the set number of times within the set period. 13 is a driving section, and counting control section I
A disconnection signal output from O is input, and the buzzer 14 is sounded and the open/close switch 15 is opened. The open/close switch 15 is mounted on the surface of the main body 1 and can be opened and closed manually.

このように構成された断線検出装置において、ケーブル
2に断線が生じると、その断線箇所にて放電が起こり、
瞬間、高レベルのパルス電流が閉ループ上を流れる。こ
の場合、パルス電流がケーブル2上を流れることによっ
て、ピックアップコイル6に電圧が誘起し、この誘起し
たパルス電圧がフィルタ7に供給され、ここで高周波成
分のみ抽出されてレベル設定部8に供給される。そして
レベル設定部8によって設定レベル(例えば、70dB
)以上のものが計数制御部10に供給される。
In the disconnection detection device configured in this way, when a disconnection occurs in the cable 2, an electric discharge occurs at the disconnection point, and
Momentarily, a high level pulsed current flows in a closed loop. In this case, as the pulse current flows on the cable 2, a voltage is induced in the pickup coil 6, and this induced pulse voltage is supplied to the filter 7, where only high frequency components are extracted and supplied to the level setting section 8. Ru. Then, the level setting unit 8 sets the level (for example, 70 dB).
) are supplied to the counting control section 10.

計数制御部IOは、レベル設定部8から供給されるパル
ス電圧の数を期間設定器計数12で設定された期間(例
えば、30秒)毎に計数し、その計数結果が回数設定器
l【で設定された回数(例えば、2048回)以上であ
る場合に、ケーブル2、電源ケーブルまたは本体l内に
断線が生じたものと判断し、断線信号を駆動部13に供
給する。駆動部I3に断線信号が供給されると、ブザー
I4が駆動されるとともに、開閉スイッチ15が閉状態
になる。これにより、使用者は断線が生じたものと判断
する。また、この際、使用者は開閉スイッチ15を手動
で閉状態にしてもケーブル2が断線あるいは断線しかか
りであれば、放電が生じるので、再び開閉スイッチ15
は閉状態になる。
The counting control section IO counts the number of pulse voltages supplied from the level setting section 8 every period (for example, 30 seconds) set by the period setting device counter 12, and the counting result is sent to the number setting device l[. If the number of times is equal to or greater than a set number (for example, 2048 times), it is determined that a disconnection has occurred in the cable 2, the power cable, or the main body l, and a disconnection signal is supplied to the drive unit 13. When the disconnection signal is supplied to the drive unit I3, the buzzer I4 is driven and the open/close switch 15 is closed. As a result, the user determines that a disconnection has occurred. In addition, at this time, even if the user manually closes the open/close switch 15, if the cable 2 is disconnected or is about to disconnect, discharge will occur, so the user must close the open/close switch 15 again.
becomes closed.

このように、発生するノイズの数を計数し、その計数値
が所定値以上であった場合に断線が生じたものと判断す
るので、例えば、スイッチングノイズに見られる単発、
高レベルのノイズに対しての誤動作がほとんど生じない
In this way, the number of noises that occur is counted, and if the counted value is greater than or equal to a predetermined value, it is determined that a wire break has occurred.
Almost no malfunction occurs due to high level noise.

また、ピックアップコイル6を用いてノイズの検出を行
うので、直接、ケーブル2をアンテナとして侵入するノ
イズに対する影響がほとんどない。
Furthermore, since noise is detected using the pickup coil 6, there is almost no effect on noise that directly enters the cable 2 as an antenna.

なお、上゛記実施例において、ピックアップコイル6を
ケーブル2に配置させたが、電源ケーブルに配置させて
も良い。
In the above embodiment, the pickup coil 6 is arranged on the cable 2, but it may be arranged on the power cable.

また、上記実施例において、高周波電圧が出力されてい
る状態でコネクタCの抜き差しを行った場合にも、検知
回路が動作するので、電源オフ機能としても使用できる
という利点が得られる。
Furthermore, in the embodiment described above, even if the connector C is connected or disconnected while a high frequency voltage is being output, the detection circuit operates, so there is an advantage that it can also be used as a power off function.

「発明の効果」 以上説明したように、この発明による断線検出装置によ
れば、ノイズを検出する検出手段と、この検出手段によ
って検出されるノイズの数を計数し、その計数結果が予
め決定した基準値よりも大となった時点で停止信号を出
力する判定手段と、この計数手段から出力される停止信
号に基づいて前記電気機器の動作を停止ささせる停止手
段とを具備したので、断線によるノイズとその他のノイ
ズとの識別を高精度で行うことができる。
"Effects of the Invention" As explained above, the wire breakage detection device according to the present invention includes a detection means for detecting noise, and counts the number of noises detected by this detection means, and the counting result is determined in advance. Since it is equipped with a determination means that outputs a stop signal when the value exceeds a reference value, and a stop means that stops the operation of the electrical equipment based on the stop signal output from the counting means, it is possible to prevent wire breakage. Noise can be distinguished from other noises with high accuracy.

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

第1図はこの発明の一実施例である断線検出装置を示す
ブロック図、第2図および第3図は放電によるノイズの
発生の原理を説明するため図である。 12・・・・・・計数期間設定器(10−12は判定手
段を構成する)、 I3・・・・・・駆動部、 14・・・・・・ブザー 15・・・・・・開閉スイッチ(13,15は停止手段
を構成する)。
FIG. 1 is a block diagram showing a disconnection detection device which is an embodiment of the present invention, and FIGS. 2 and 3 are diagrams for explaining the principle of noise generation due to discharge. 12... Counting period setter (10-12 constitutes a determining means), I3... Drive unit, 14... Buzzer 15... Open/close switch (13 and 15 constitute stopping means).

Claims (2)

【特許請求の範囲】[Claims] (1)電気機器の配線の断線や断線しかかりに時に発生
するノイズに基づいて断線検出を行う断線検出装置にお
いて、前記ノイズを検出する検出手段と、この検出手段
によって検出されるノイズの数を計数し、その計数結果
が予め決定した基準値よりも大となった時点で停止信号
を出力する判定手段と、この計数手段から出力される停
止信号に基づいて前記電気機器の動作を停止ささせる停
止手段とを具備することを特徴とする断線検出装置。
(1) In a disconnection detection device that detects a disconnection based on the noise that sometimes occurs when the wiring of an electrical device is disconnected or about to disconnect, it includes a detection means for detecting the noise and the number of noises detected by the detection means. determining means for counting and outputting a stop signal when the counting result becomes larger than a predetermined reference value; and stopping the operation of the electrical equipment based on the stop signal output from the counting means. A disconnection detection device comprising: a stopping means.
(2)前記検出手段にコイルを用いたことを特徴とする
請求項1記載の断線検出装置。
(2) The disconnection detection device according to claim 1, wherein a coil is used as the detection means.
JP20749989A 1989-08-10 1989-08-10 Disconnection detection device Expired - Lifetime JP2815185B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20749989A JP2815185B2 (en) 1989-08-10 1989-08-10 Disconnection detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20749989A JP2815185B2 (en) 1989-08-10 1989-08-10 Disconnection detection device

Publications (2)

Publication Number Publication Date
JPH0370579A true JPH0370579A (en) 1991-03-26
JP2815185B2 JP2815185B2 (en) 1998-10-27

Family

ID=16540728

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20749989A Expired - Lifetime JP2815185B2 (en) 1989-08-10 1989-08-10 Disconnection detection device

Country Status (1)

Country Link
JP (1) JP2815185B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009148430A (en) * 2007-12-20 2009-07-09 Ito Chotanpa Kk Electronic therapeutic apparatus and disconnection spark detection circuit of electronic therapeutic apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009148430A (en) * 2007-12-20 2009-07-09 Ito Chotanpa Kk Electronic therapeutic apparatus and disconnection spark detection circuit of electronic therapeutic apparatus

Also Published As

Publication number Publication date
JP2815185B2 (en) 1998-10-27

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