KR100289010B1 - Disconnection and spark detecting circuit in medical equipment - Google Patents

Abstract

Provided is a disconnection spark detection circuit of a therapeutic device for physical science that can reliably detect disconnection sparks due to poor contact of a therapeutic ceramic.

The primary line 6p1 and 6p2, which are divided into two in the output line 2, are wound so as to generate magnetic flux in the opposite direction, and the output line 2 is provided by a detection transformer 6 which takes a signal from the secondary winding 6s. Since disconnection sparks are detected, disconnection of the output line can be reliably detected.

Description

Disconnection spark detection circuit of medical treatment device {Disconnection and spark detecting circuit in medical equipment}

The present invention relates to a medical treatment device, and more particularly, to a disconnection spark detection circuit of a medical treatment device having a disconnection spark detection function of an output line.

Conventional disconnection spark detection circuits have been widely used to detect noise voltages caused by disconnection sparks in output lines by capacitive coupling.

By the way, in the above-described detection method, even extraneous noise on the output line is often taken as a detection signal, and thus malfunctions are inevitable.

In addition, there is a problem in that a circuit for discriminating noise and extraneous noise due to a single wire spark is complicated and manufacturing costs are high.

The present invention has been made under such a background, and is hardly affected by extraneous noise, and can electrically separate the circuit from the output line and the control circuit, and can reliably detect disconnection sparks with high reliability, low cost and simple circuit. It is an object of the present invention to provide a disconnection spark detection circuit of a medical treatment device.

1 is a block diagram showing the configuration of a medical treatment device according to an embodiment of the present invention.

2 is a view showing the waveforms of the primary side and the secondary side of the disconnection spark detection circuit of the medical treatment device according to an embodiment of the present invention.

3 is a diagram illustrating a configuration of a detection transformer of the disconnection spark detection circuit.

<Explanation of sign>

1 high frequency voltage generator

2 output lines

3 Therapeutic Pottery

4 load (human)

5-wire spark detection circuit

6 Detection Transformer

6p1, 6p2 primary winding

6s secondary winding

7 Rectifier / Integral Circuit

8 Detection transformer

8c1, 8c2 fantasy core

8p1, 8p2 primary winding

8s secondary winding

In order to solve the above problem, the invention of claim 1,

In the therapeutic apparatus for physiotherapy in which a disconnection spark detection circuit for detecting disconnection of the output line is inserted in the output line,

The output line of the single-line spark detection circuit includes a primary winding in which each of the two divided regions generates magnetic flux in a reverse direction, and a detection transformer that takes harmonic components of the primary winding as signals in the secondary winding. It provides a disconnection spark detection circuit of a medical treatment device characterized in that detecting the disconnection of.

In addition, the invention of claim 2,

Two small annular cores are used as the detection transformer, and the structure is less susceptible to external noise, and the output line side circuit and the disconnection spark detection circuit are electrically separated from each other. Provides disconnection spark detection circuit of.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a block diagram showing the configuration of a medical treatment device according to an embodiment of the present invention.

In this figure, reference numeral 1 denotes a high frequency voltage generator which generates a voltage of several hundred volts at a frequency of several hundred kHz to 100 kHz order, and is charged to the human body that is the load 4 via the output line 2 and the therapeutic conductor 3. Treatment is performed.

In addition, a disconnection spark detection circuit 5 is inserted into the output line 2. The disconnection spark detection circuit 5 is composed of a detection transformer 6 and a rectification / integrating circuit 7 for rectifying and integrating and detecting the disconnection spark voltage detected by the transformer 6.

As shown in FIG. 1, the detection transformer 6 is divided into two equally arranged polarities so as to have opposite polarities, and the primary windings 6p1 and 6p2 connected in series are inserted into the output line 2, and the secondary windings ( The disconnection spark signal detected by 6s) is taken as a direct current detection output by the rectifying / integrating circuit 7 and passed to a signal processing circuit (not shown).

The operation of the disconnection spark detection circuit of FIG. 1 will be described with reference to the operation waveforms on the primary side and the secondary side of the detection transformer shown in FIG.

When the high frequency voltage generated by the high frequency voltage generator 1 is applied to the load 4 through the disconnection spark detector 5 and the therapeutic conductor 3 connected by the output line 2, the respective parts are normally connected. In this case, since the primary-side windings 6p1 and 6p2, which are divided into two parts of the detection transformer of the disconnection spark detection circuit, are wound so as to generate magnetic flux in opposite directions, the waveform applied to the primary side as shown in Fig. 2A. Is not transmitted to the secondary side, and no voltage is applied to the rectification / integrating circuit 7 of FIG. 1 and no detection output occurs.

Since the voltage of the high frequency voltage generator 1 is often a voltage of several hundred V, when the therapeutic conductor 3 has a poor contact due to a change over time or the like, it is disconnected and causes sparks.

In this way, when any part of the output line is in a state of causing a disconnection spark, a waveform as shown on the primary side of FIG. 2B is applied to the detection transformer 7 as an example.

As described above, since the primary windings of the detection transformer 7 are wound so that the two divided windings 6p1 and 6p2 generate magnetic flux in the opposite direction to each other, the primary wave component of the high frequency voltage is applied to the secondary side. Although not induced, when a spike type current as shown in FIG. 2B is applied to the primary winding, harmonic components are induced to the secondary winding due to magnetic imbalance due to the transient current of the divided primary windings 6p1 and 6p2. do.

The harmonic component signal induced in this secondary winding is converted into a DC signal by the rectifying / integrating circuit 7 to be detected and output, and drives an abnormality detection circuit (not shown).

Next, the structure of the detection transformer used for the disconnection spark detection circuit in FIG. 3 is demonstrated with reference to FIG.

In this figure, the detection transformer 8 is used in the same manner as the detection transformer 7 of FIG. 1, but the detection transformer 8 is a primary winding 8p1, 8p2 with two annular cores 8c1, 8c2. ) Are respectively wound as shown, and the secondary winding 8s is wound so as to be connected to both of the annular cores 8c1 and 8c2.

When the current flows to the primary side by this winding method, when the direction of the magnetic flux generated by the core 8c1 is the arrow A, the direction of the magnetic flux generated by the core 8c2 becomes the direction of the arrow B. The magnetic flux is dissipated with respect to the secondary winding and no voltage is generated with respect to the fundamental wave of the flowing current.

As a toroidal core to be used, by using a small core having a thin core thickness, the influence of the extraneous noise from each direction can be reduced for each core, and the influence of the extraneous noise generated in the secondary winding can be eliminated.

As mentioned above, although the operation | movement of one Embodiment of this invention was described above with reference to drawings, this invention is not limited to this embodiment and a design change etc. are included in this invention within the range which does not deviate from the summary of this invention.

For example, the two annular cores 8c1 and 8c2 can be effectively used to take harmonic component signals by using different characteristics in the harmonic region of the use frequency.

In addition, by using the above-described abnormality detection signal, it is easy to generate an alarm by sound or light, and it is also possible to turn off the power supply of the device or turn off the output line.

As described above, according to the present invention, in the therapeutic device for physical treatment by charging the high-frequency voltage to the human body through the therapeutic ceramic,

The output line and the disconnection spark detection circuit are electrically connected because the primary winding divided into two output wires is wound to generate magnetic flux in the opposite direction and the disconnection of the output line is detected by a detection transformer that takes a signal from the secondary winding. It is possible to configure the disconnection spark detection circuit of the output line, which can be separated from each other and is hardly affected by extraneous noise.

Claims (2)

In the therapeutic apparatus for physiotherapy in which a disconnection spark detection circuit for detecting disconnection of the output line is inserted in the output line, The disconnection spark detection circuit, Disconnection of the output line is detected by a primary winding in which each of the two equally divided regions is wound with each other to generate a magnetic flux in a reverse direction, and a detection transformer that takes harmonic components of the primary winding as signals in the secondary winding. Disconnection spark detection circuit of medical treatment device. The method of claim 1, wherein the detection transformer, Disconnection spark detection of a medical treatment device characterized in that the structure is hardly affected by extraneous noise by using two small annular cores and electrically separates the output line side circuit and the disconnection spark detection circuit. Circuit.