JPS6120563A - Ultrasonic or short wave treating device equipped with automatic tuning apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an ultrashort wave treatment device that transmits electromagnetic waves with a frequency band of 10 to 50 MHz to treatment areas of the human body and performs treatment using the thermal effect of Joule heat generated within the body. and an automatic tuning device for a shortwave therapy device (hereinafter simply referred to as the "device").

The general configuration of conventional equipment is as shown in FIG.

The oscillation circuit (c) oscillates the treatment fundamental frequency, amplifies it with a buffer amplifier circuit (equalization), an excitation amplifier circuit (Q), and further amplifies the power to a specified output with an output amplifier circuit 0, and then outputs it with an output matching circuit ( c), by using a variable capacitor (1) or other adjustment means,
The device body side (Bo) and the conductor part (F) that includes the conductor, transmission line, and cable that is applied to the treatment area of the human body that is the load.
The user manually performs output matching, or tuning. The circuit (goods) is a constant power supply circuit.

This conventional method has the disadvantage that, since the load impedance varies in various treatment areas, it is cumbersome for the user to manually perform tuning for each treatment area. Furthermore, even if synchronization is achieved, if the human body moves during treatment, the load impedance of the part will change even with a slight movement. As a result, a synchronization shift, that is, a mismatch occurs, and the treatment continues with the mismatch, which has the disadvantage that the intensity of high-frequency radio waves emitted to the area decreases, and the thermal effect is weakened.

Moreover, not only the therapeutic effect is weakened, but also the loss of the device itself increases by the amount reduced.

As shown in Figure 1, the control circuit 0 can be used to control the oscillation cycle of the oscillation circuit (c), or to control the amplification of the buffer amplifier circuit (c), excitation increase, and width circuit (q). Control using circuit 0 can be done using the conventional method, but although this method allows the degree of excitation to be adjusted to output amplifier circuit 0, the fundamental mismatch from the conductor due to the change in load impedance as described above is avoided. No improvement can be expected.Therefore, conventional methods have the disadvantage of reduced output due to mismatching, which is a fatal drawback of this type of equipment, as well as abnormal heat generation of the equipment, increased power consumption, and surrounding interference due to unnecessary high-order harmonics. Various drawbacks are likely to occur, such as radio wave interference to equipment and damage to internal parts of equipment due to abnormal overvoltage.

The present invention has been made to eliminate the above-mentioned drawbacks, and its schematic structure is as shown in FIG. 2, 1ζ. Its detailed configuration is shown in Figure 4 and will be explained below. The oscillation circuit (c), which is composed of a combination circuit of a transistor (2), a capacitor 31, and a coil (4), oscillates at the therapeutic fundamental frequency. A buffer/synthesizing amplifier circuit (E9 inputs and amplifies the output from the oscillation circuit (c). Transistor (8) and The excitation amplification circuit 0, which is composed of a coupling circuit of a coil (9), a capacitor UCa, a capacitor UCa, a coil III, an I12, and a coil 113, further amplifies the high-frequency signal output from the buffer amplifier circuit (c). is used to perform actual impedance adjustment.

Match and adjust the transformer for output amplification to output the required fundamental frequency with maximum efficiency. The matched signal is output to the conductor section (G), which consists of conductor (■) and cable, etc. In addition, in the embodiment shown in the figure, the control circuit 0, which is mainly equipped with a transformer resistor (C), a variable resistor (C), and a resistor (C), changes the resistance value using a variable resistor (C) or a switch, etc. By adjusting Output adjustment is possible even if connected to the amplifier circuit (q).In order to protect the output amplifying transistor 9 from overvoltage due to π adjustment, etc., the overcurrent from the output amplifying transistor t151 is detected by the resistor 9 of the control circuit 0. Then, reduce the IA of the transistor by reverse biasing the transistor @, and connect the transistor (5) of the buffer amplifier circuit (C).
) is also controlled by reducing the amplification degree.

The automatic tuning device all (J) includes a detection section for detecting mismatch, an output matching circuit (c) based on the output in the detection section, and a tuning control section (1) for controlling the tuning, and a groove section CD').
Detects the misalignment between the oscillation circuit (c), amplifier circuit (Q, 0, etc.), and uses the DC motor, gear, and pulley speed reduction mechanism to adjust the matching part such as the balin (2) in the output matching circuit ■. By controlling the output matching path (c), the output matching path (c) is automatically tuned.

The automatic tuning mechanism of the automatic tuning device U) in the illustrated embodiment takes place as follows.

That is, in the detection section, a part of the output detected by the coil fin, which is loosely coupled to the coil in the output matching circuit 0, is detected by the diode ■, and is detected by the transistor (
The output level is then amplified by the operational amplifier (31) and is amplified by the operational amplifier (2). and level converted, and is input to one terminal of the converter (to).

A reference voltage corresponding to a target output level is inputted to the other input terminal 1 of the comparator via a variable resistor ω or a switch. Now, the load impedance changes due to the movement of the human body, the output level decreases, and the detection
When the amplified input level becomes low and below the reference voltage, the flip-flop in the tuning control section (1) is set, and at its high level, the Darlington connected transistors (T) and (T) are activated. It operates to rotate the DC motor (7) in the forward direction (or one direction) and adjust the variable capacitor CJII connected via the speed reduction mechanism. Be careful not to think that the reference voltage is an ideal match. In addition, air capacitors (air variable condensers), trimmer variable capacitors, variable film capacitors, variable magnetic capacitors, variable glass capacitors, coaxial capacitors, variable inductances (variable coils), etc. can be used for reconciling.

In addition to the above-mentioned detection of mismatch, in addition to the voltage of the output matching circuit (c), its current, treatment output power (travelling wave power), reflected power, etc. , amplifier circuit (c).

(The mismatch may be detected based on the voltage, current, treatment power, reflected power, etc. at q, 0, etc.) (During 1° rotation, the light emitting diode (3) emits light to notify the user of the rotation. In the tuning control section (G), for tuning,
First, as described above, the E motor ω is rotated by a certain amount.

During that time, the maximum value of the output level is detected, and the motor ω is then rotated. When the output level again matches the maximum value, the motor ω is stopped and the variable capacitor is synchronized. This effect will be explained in more detail below.

A maximum value detection circuit, which is composed of an operational amplifier @, (to), a capacitor (■), and a resistor f4L diode (4D, (invert)) into which the output of the operational amplifier (to) in the detection section is input, is provided in the tuning control section (1). This maximum value detection circuit detects and holds the maximum value of the output value of the operational amplifier ■, which varies with the rotation of the motor ω.This maximum value output is connected to one input terminal (product) of the comparator (g). On the other hand, the other input terminal (to) of this comparator (431) receives only paper-level input for a certain period of time from the start of motor rotation, as described below.In other words, at the same time as the start of rotation, The timer IC 1441 is triggered from the flip-flop via the capacitor, turns on and makes the output of the comparator 1461 a negative level, and the FET (4η is turned off.Therefore, the output of the operational amplifier (2) is prevented from being input to the other terminal of the comparator, and only a low level input is input to the terminal (to).

In this way, in the comparator, the maximum level and the very low level are compared for a certain period of time from the start of rotation, so the comparator does not always output a signal during that time. A certain period of time from the start of this rotation is a period for detecting the maximum value.

Note that the time when this maximum value is output is when the output is matched to the load impedance.

IP Next, when this certain period of time has elapsed, FET1dη is turned on, and the output of operational amplifier (2) is input to the other input terminal (to) of the comparator. Therefore, the input fluctuates according to the rotation of motor ω, and the fluctuating input and the maximum value are compared by a comparator (43). When the input matches the maximum value, it is recognized that the synchronization is achieved, and comparator 0 outputs a signal. The output signal is applied to the reset input of the flip-flop via the diode ω,
transistor.

1) is turned off, and the DC motor ω stops rotating.

Incidentally, a timing chart showing the relationship between the maximum value detection period, the comparison operation period of the comparator, and the motor rotation period is shown in FIG. Figure 8 (a) shows the operating time for detecting the maximum value, Figure 8 ('b) shows the operating time for the comparator to compare the output with the maximum value, and Figure 8 (C) shows the rotation period of the motor. show. When the flip-flop stops, the rising pulse causes the resistor M and capacitor ■
The timer ICt51 is set for a period of time on the back of a constant.
1 is turned on, and the transistor connected to Darlington with its high level output is a counterfeit, ■)! IN! By making J, the DC motor is reversed, which acts as a brake, and the variable capacitor t21) stops at the synchronized position.

The diode (571-+581 is a transistor Zheng) due to the back electromotive voltage of the DC motor ω, protects the diode (2) from being destroyed.

When the user presses the reset switch 1) arbitrarily, the flip-flop is set even if the output level is not below the L'Ah pressure set by the resistor, and the tuning is performed as described above. You can take it.

As described above, according to the present invention, the user sets the IJ to the site, turns on the power of the device, and sets the output adjustment volume or switch to an arbitrary value, and the synchronization is automatically achieved. In addition, even if inconsistency occurs during treatment, 1. The device automatically searches for the synchronization point in that area, making it possible to continue treatment in a consistent state at all times. Therefore, inconveniences such as power wastage and overheating can be prevented.

[Brief explanation of drawings]

Figure 1 shows the block diagram of a conventional ultrahigh frequency or short wave treatment device.
The diagram, FIG. 2 is a block diagram of the ultra high frequency or short wave treatment device of the present invention, FIG. 8(a), (
b) and (c) are timing charts for explaining the present invention, and FIG. 4 is a circuit diagram of an embodiment of the present invention. In the figure, (c)...Oscillation circuit, (搏...Buffer amplifier circuit, (Q...Excitation amplifier circuit, 0...Output amplifier circuit, (
b)... Output matching circuit, 0... Conductor section, (Q...
Control circuit, 0... constant power supply circuit, (I)... variable capacitor, (sword... automatic tuning device.

Claims (1)

[Claims] 1. An oscillation circuit that oscillates a signal at a treatment fundamental frequency, an amplifier that amplifies the output of the oscillation circuit, an output matching circuit that inputs the output of the amplifier and performs output matching, and a human body. A conductor part that is in contact with a treatment area and has a conductor, conductive line, etc. for transmitting radio waves to the human body, and which inputs the output of the output matching circuit, and a treatment of an output matching circuit, a conductor part, or an amplifier circuit. An automatic tuning device comprising a detection section that detects power, reflected power, voltage, or current and automatically detects a mismatch state, and a tuning control section that controls the output matching circuit and performs matching based on the output of the detection section. An ultrahigh-frequency or short-wave treatment device equipped with an automatic tuning device characterized by comprising: 2. The automatic tuning device according to claim 1, characterized in that the detection section recognizes misalignment when there is a deviation from the normal tuning point by a certain width, and the certain width is variable. Ultra short wave or short wave treatment device. 3. The tuning control section is configured to be able to manually start tuning control of the output matching circuit regardless of whether or not mismatching is detected by the detection section. An ultrahigh frequency or short wave therapy device comprising the automatic tuning device according to item 2. 4. An ultra high frequency or short wave therapy device equipped with an automatic tuning device according to any one of claims 1 to 3, characterized in that the matching section of the output matching circuit utilizes a variable air capacitor. 5. An ultra high frequency or short wave therapy device equipped with an automatic tuning device according to any one of claims 1 to 3, characterized in that the matching section of the output matching circuit uses a trimmer variable capacitor. 6. Claims 1 to 3, characterized in that the matching section of the output matching circuit uses a variable film capacitor.
An ultrahigh-frequency or short-wave therapy device equipped with the automatic tuning device according to any of the preceding paragraphs. 7. An ultra high frequency or short wave therapy device equipped with an automatic tuning device according to any one of claims 1 to 8, characterized in that the matching section of the output matching circuit utilizes a variable magnetic capacitor. 8. An ultra high frequency or short wave therapy device equipped with an automatic tuning device according to any one of claims 1 to 8, characterized in that the matching section of the output matching circuit uses a variable glass capacitor. 9. An ultra high frequency or short wave therapy device equipped with an automatic tuning device according to any one of claims 1 to 8, characterized in that the matching section of the output matching circuit uses a variable coaxial capacitor. 10. An ultra high frequency or short wave therapy device equipped with an automatic tuning device according to any one of claims 1 to 3, characterized in that the matching section of the output matching circuit utilizes a variable inductance. 11. The amplifier circuit includes a buffer amplifier circuit to which the output of the oscillation circuit is input, an excitation amplifier circuit to which the output from the buffer amplifier circuit is input, and an output amplifier circuit to which the output from the excitation amplifier circuit is input. Characteristic claim 1
An ultrahigh-frequency or short-wave therapy device comprising the automatic tuning device according to any one of items 1 to 10. 12. The device according to claim 11, further comprising a control circuit that detects the current or voltage of the output amplification circuit and controls the oscillation frequency of the oscillation circuit so as to protect the output amplification circuit. Ultrahigh frequency or short wave therapy device equipped with an automatic tuning device. 13. A control circuit that detects the current or voltage of the output amplification circuit and controls the amplification factor of either or both of the buffer amplifier and the excitation amplification circuit so as to protect the output amplification circuit. An ultrahigh frequency or short wave treatment device comprising the automatic tuning device according to claim 11. 14. An ultrahigh frequency or Short wave treatment device.