SU773994A1 - Apparatus for low-frequency therapy - Google Patents

Abstract

A DEVICE FOR LOW-FREQUENCY THERAPY, containing interconnected transducer, coupling capacitor, signal conditioner and irradiator, characterized in that, in order to increase the stability of parameters, the transducer is a fixed-generator. The repetition frequencies, and the shaper consists of series-connected diodes and parallel-connected capacitors and a resistor connected to the diodes, and a time relay and an oscillation indicator connected to the generator are inserted into the device.

Description

The invention relates to the field of medicine, namely to electromedical equipment, and can be used for the treatment of diseases associated with vascular pathology and lung diseases.

A device for low frequency therapy is known, comprising a transducer, a coupling capacitor, a driver and a feed.

A disadvantage of this device is that it generates high power pulses and has low stability.

The purpose of the invention is to increase the stability of the parameters.

For this, the converter is a generator of fixed repetition frequencies, and the driver consists of series-connected diodes, in parallel it connects

capacitors and a resistor connected to the diodes, while the device is connected to the interconnected time relay and the oscillation indicator connected to the generator.

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FIG. Figure 1 shows a block diagram of a device for pulsed low frequency therapy; in fig. 2 and 3 co with the shape of the pulses at the input and output of the signal conditioner, respectively.

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The device contains a pulse generator 1, a driver 2 signals, an irradiator 3, a coupling capacitor 4, an indicator of 5 oscillations, a time relay 6, diodes 7 and 8, a capacitor 9 and a resistor 10. One of the outputs of the generator 1 is connected to the coupling capacitor 4 and the other r to the indicator 5 vibrations. The connection point of the diodes 7 and B is connected to the coupling capacitor 4, and the diodes 7 and 8 to the parallel 1U and equatorically connected capacitor 9, grounded on one side and connected to irradiator 3 on the other. The output of time relay 6 is the same as the 5-waveform indicator. The device works as follows. Through the time relay 6, the voltage of the power supply is applied to the pulse generator 1 of fixed repetition frequencies. The negative-polarity signals generated by the generator are rectangular (see Fig. 9). Their frequency can be fixed (stepwise) in a certain frequency range. From the generator, pulses are fed to the driver 2 signals and through a diode. 8, the capacitor 9 is charged. After the capacitor charge terminates at the moment of no signal from the generator, the capacitor 9 is discharged through the resistor 10, and the diode 7 is used to improve the waveform of the signal, the negative polarity produced by the shaper 2 signal (see Fig. 3) has, for example, in the lower part a duration of 5-15 microseconds and in the upper part - .5-10 ms with a maximum no-amplitude of 7-9 V. It enters the irradiator 3 and is emitted in the form of electromagnetic waves. The irradiator 3, a metal plate with a size of, for example, 50 x 60 mm, is mounted on a pin holder connected to the device circuit through the socket at a distance of 25-30 cm from the patient's irradiation site, for example, the eye plane-forehead area. Then, using a switch of the repetition frequency, the pulse frequency of the generator is strictly required for this operation, and the required duration of irradiation is set at the time relay. The circuit is turned on and the patient is irradiated. Relay at the end of the set time for the desired repetition frequency turns off the device and gives a signal to the indicator. Then the following mode is set — the frequency of the pulses sent by the generator and the duration of the irradiation procedure; Again, the device is turned on for irradiation and also automatically turns off using a time relay. The waveform, generation frequency and duration of the procedure of irradiating a patient with low frequency pulses are strictly regulated parameters. In the proposed device, the first two requirements are provided by the fixed repetition frequency generator and signal conditioner circuitry. The time relay monitors the duration of the irradiation procedure, at the appropriate time interrupts oscillations of the generator circuit and sends a signal to the indicator that the procedure is complete. The proposed device ensures the stability of the frequency, waveforms and the duration of the treatment procedure, which increases the performance of the device.

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Claims (1)

A device for low-frequency therapy containing interconnected transducer, coupling capacitor, signal shaper and irradiator, characterized in that, in order to increase the stability of parameters, the converter is a generator of fixed repetition frequencies, and the shaper consists of series-connected diodes and parallel-connected capacitors and a resistor connected to the diodes, while a time relay and an oscillation indicator connected to the generator are connected to the device torus.