RU1823129C - Two-frequency generator for medical treatment - Google Patents

Abstract

Usage: in electronics, medicine as devices for treatment, in which the formation of two signals occurs with a frequency shift. The inventive two-frequency generator for the treatment of diseases by the Nemeck method comprises a triangular waveform generator 1, a voltage regulator 2, a driver of two low-frequency signals 3, a block of controlled attenuators 4, a block of power amplifiers 5, a block of keys 6. a block of communication elements load and indication of load current and protection operation 7. output electrodes 8, unit for protecting load electrodes from overload currents when switching power 9, power unit 10. Improving installation accuracy and increasing The stability of the frequency shift between the low-frequency output signals makes it possible to increase the accuracy of setting the interference currents used in therapy, while simplifying the implementation and operation of the device 3 il. Yo

Description

The invention relates to general purpose electronic circuits, in particular, to electric oscillation generators, which produce two sinusoidal voltages with a frequency shift at the output. Such devices can be used, for example, in medicine for treatment according to the Nemeck method.

The aim of the invention is to increase the accuracy of the installation and increase the stability of the frequency shift between the output signals of low frequency; simplification of the operation of the device, as well as a significant reduction in weight and size characteristics and cost, increasing the reliability of the device without reducing the therapeutic effect.

Figure 1 shows a block diagram of a device; figure 2 - shaper of two low-frequency signals 3; Fig. 3 shows a driver of control signals 16.

The device for the treatment of interference currents consists of a series-connected signal generator of a triangular shape 1, a voltage regulator 2, a driver of two low-frequency signals 3, a block of controlled attenuators 4, a block of power amplifiers 5, a block of keys 6, a block of communication elements with a load and an indication load current and tripping of protection 7 connected to electrodes 8. The device also includes a unit for protecting load electrodes from overload currents when switching power

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9, the input of which is connected to the output of the block of controlled attenuators 4. and the output - with the block of keys and the block of communication elements with the load and indication of the load current and protection operation 7. There is also a power supply 10.

The driver of two low-frequency signals (Fig. 2) is made up of series-connected high-frequency generator 13, a reversible counter 15. DAC 18, a triangular-shaped signal to signal converter 20, and a low-pass filter 21, the output of which is the first output of the driver of two low-frequency signals, and its second output is a second low-pass filter 22 to which a serial circuit is connected: voltage-frequency converter 11, counting trigger 12, reversible counter 14, reversible th counter 17, digital-to-analog converter 19, and a triangular-shaped signal to sinusoidal signal converter 23. The input of the counting direction of the reverse counter 14 is connected to the first input of the driver of the control signals 16 and the input of the reverse counter 15, the clock input of the counting trigger 12, the clock input of the reverse counter 17. Input counter direction of the counter 15 is connected to the second output of the control signal generator 16, input counter direction of the counter 17 is connected to the third output house shaper control signals 16, data input preset down counter 17 is connected to the fourth output of the control signals 16 and the output of down counter 17 is connected to a third input of the control signals 16.

In the control signal generator (Fig. 3), the first input is connected to the decoder 24 and the decoder 25. The output of the decoder 24 is connected to the S-input of the trigger 26, and the output of the decoder 25 is connected to the R-input of the trigger 26, the output of the trigger 26 is the first output the driver of the control signals 16 and is connected to the input of the inverter 28 and the first input of the circuit And 31. the second input of the driver of the signals 16 is connected to the decoder 29 and the encoder 30. the output of the decoder 29 is connected to the S-input of the trigger 35, and the output of the decoder 30 to R trigger input 35, trigger output 3 5 is the second output of the driver of control signals and is connected to the input of the one-shot 27 The output of the one-shot 27 is connected to the second input of the circuit And 31 and the second input of the

And 32, and also is the fourth output of the driver of control signals 16, the output of the inverter 28 is connected to the first input of the circuit And 32, the third input of the driver

control signals 16 is connected to the input of the decoder 33 and the input of the decoder 34, the output of the decoder 34 is connected to the second input of the OR circuit 37, the output of the circuit And 31 is connected to the first input of the OR circuit

36, the output of AND circuit 32 is connected to the first input of the OR circuit 37, the output of OR circuit 36 is connected to the S-input of trigger 38, the output of OR circuit 37 is connected to the R input of trigger 38, and the output of trigger 38 is the third

output of the driver of control signals. All nodes of the device, except for the shaper of two low-frequency signals 3, are similar to the corresponding nodes of the prototype.

The signal generator of the triangular shape 1 generates a voltage of a triangular shape with a period of 15 s, which is supplied to the voltage regulator 2, which serves to set the value of the differential frequency (A f) in

manual or automatic mode. In manual mode, the constant value of the difference frequency is set within the range of 0 ... 100 Hz using voltage. coming from the engine variable resistor installation f.

in automatic mode, the difference frequency changes triangularly with a period of 15 s under the action of a voltage coming from a signal generator of a triangular shape 1. The driver of two low-frequency signals 3 generates a constant frequency voltage of 4.1 kHz at the first output, and at the second output voltage with a frequency of 4 ... 4.1 kHz, and the value of the differential frequency Af is determined by the voltage applied to the output of the driver of two low-frequency signals 3 from the output of voltage regulator 2. Signals of the driver of two low-frequency GOVERNMENTAL signals through the unit actuated attenuators

4 are fed to the power amplifier unit 5 and the unit for protecting the load electrodes from overload currents when switching power 9, which prevents the supply of voltage to the electrodes with

main power toggle switch. When you turn on the device, the block of protection of the load electrodes from overload currents when switching power 9 using the key block 6 opens the output

circuit until the slider of the variable current regulation resistor in block 4 is set to its initial position. Thus, setting the currents in the output circuits from zero to the rated value

possible only under operator control. The block of elements of communication with the load and indication of the load current and tripping of protection 7 serves to control the currents in the output circuits with the help of a pointer meter, as well as to indicate the mode of disconnection of the output that occurs when the block of protection of the load electrodes from overload currents when switching power.

The driver of two low-frequency signals 3, which carries out a frequency shift at the second output relative to the frequency at the first output, comprises a driver of the control signals 16, which operates as follows. The decoders 24, 29. 33 generate the logical unit levels at their outputs when the O code comes in. The decoders 25, 30, 34 produce the logical G levels at their outputs when the code 15 comes in. The one-shot 27 produces a short output pulse when the voltage changes at its input from Г to О, i.e. the reverse counter 15 goes to state 15. Such a construction of the driver of the control signals 16 will ensure the operation of the reverse counters 14 and 15 on the cycle ......- ... (30 states in the cycle), and the counting frequency of the reverse counter 14 is the frequency at the output of the PN-Ch 11 (0 ... 3 kHz), and the counting frequency of the reverse counter 15 is equal to the frequency at the output of the high-frequency generator 13 (123 kHz - 4.1 kHzhZO). The shift at the second output of the driver of two low-frequency signals 3 by the value of the interference frequency (0 ... 100 Hz) is carried out as follows: when the reversible counter 15 goes into state 15. The decoder 30 produces at its output a logic level 1. trigger 35 goes from 1 to O, the one-shot 27 produces a short pulse, which sets the trigger 38 to the state in which the trigger 26 is located, and writes the four-bit output code of the reverse counter 14 to the output of the reverse counter 17. Next, the reverse counter 17 makes from this state the count of pulses coming from the high-frequency generator 13 synchronously with the reverse counter 15. If the parallel code recorded in the reverse counter 17. is constant, then there will be no frequency shift between the output signals of the reverse counters 15 and 17 . If the code at the output of the reversible counter 14 changes in a cycle ...-, .. with a frequency less than the frequency

If the single-shot is activated 27, then each time a new code value is written into the reverse counter 17, which differs from the previous value by 1, the phase of the signal at the output of the reverse counter 17 will be shifted relative to the phase of the signal at the output of the reverse counter 15 by one-thirtieth of the period (2/30. 12 °). In order to obtain a frequency difference of 100 Hz, it is necessary to change the code values at the output of the reversing counter 14 with a frequency of 10 Hz-3 kHz, which corresponds to the maximum output frequency PN-H 11. Thus, the frequency at the second output of the driver of two low-frequency signals 3 by the value of the difference frequency (0 ... 100 Hz), which is determined by the input voltage of the PN-Ch 11. The instability of the difference frequency in this case is determined by the instability of the output frequency of the PN-Ch 11. which has a value of less than 10 for any acceptable combination of external Exposure to by using a Mo-W 11 of the double integration and the quartz reference oscillator frequency stabilization. The signal from the output of the reversible counters 15, 17 is fed to the echoes of the DAC 18. 19. The output of the DAC 18, 19 generates a triangular voltage, which is converted to a sinusoidal in the signal converters of a triangular shape into signals of a sinusoidal shape 20,23 using the linear - piecewise approximation. Second order low pass filters 21. 22 reduce the harmonic distortion factor of the generated sinusoidal signal to 3%. Since the value of the difference frequency is set with the necessary accuracy and stability directly by the control elements of voltage regulator 2, there is no need for a zero setting unit, a difference frequency amplifier, or a difference frequency control unit, which are available in the prototype. The last unit contains a CRT, a high voltage CRT power supply, a sweep circuit. The exclusion of this unit significantly reduces the weight and size of the device, increases its reliability. The operation of the device is greatly simplified, since before each session there is no need to switch to the setting mode zero and carry out a correction.

Claims (1)

SUMMARY OF THE INVENTION A dual frequency generator for treating diseases by the Nemec method. comprising a triangular-shaped signal generator, a voltage regulator, a shaper of two low-frequency signals, a control unit attenuators, power amplifier block and key block, block of communication elements with load and indication of load current and protection operation, block of protection of load electrodes from overload current values during power switching, the output of which is connected to the control input of the key block and to the signal input indication of the operation of the protection of the unit of communication elements with the load and indication of the load current and the operation of the protection, the output of the signal of the first low frequency of which is connected to the first and second load electrodes, the output of the signal A low-frequency swarm of a block of communication elements with a load and indication of a load current and a trip is connected to the third and fourth load electrodes, while the other output of the low-frequency signal of the driver of two low-frequency signals is connected to another information input of the block of controlled attenuators, the other the output of which is connected to the input of the block of protection of the load electrodes from overload currents when switching power and another input of the block of power amplifiers, the other output of which is connected to other m information input of the key block, and the first and second inputs of the signal indicating the load current of the block of communication elements with the load and the indication of the load current and the operation of the protection are connected respectively to the first and second outputs of the key block, and the control input of the block of controlled attenuators is an input control house of a two-frequency generator for treating diseases by the Nemec method, characterized in. what. in order to increase the accuracy of the installation and increase the stability of the frequency shift between the output signals of the low frequency, the shaper of the two low-frequency signals is made in the form of series-connected high-frequency generator, the first reversible counter, the input of the signal of the direction control of the account of which is connected to the first output of the signal , the first digital-to-analog converter, the first converter of triangular signals to blue signals soidal shape and the first low-pass filter and series-connected voltage-frequency converter, counting trigger, the second reversible counter. the third reversible counter, the second digital-to-analog converter, the second converter of the triangular-shaped signals into sine-wave signals and the second low-pass filter, and the outputs of the first, second and third reversible counters are connected respectively to the first, second and third code information inputs of the control signal generator, the second and third outputs of the signals for controlling the direction of counting of which are connected respectively to the inputs of the signals for controlling the direction of counting of the second and third of reversible counters, and the output of the control signal for recording the driver of control signals is connected to the enable input of the preset third counter, the clock input of which is combined with the clock input of the counting trigger and connected to the output of the high-frequency generator, at 3Toii the voltage-frequency converter input is the input of the driver of two low-frequency signals, the outputs of which are respectively the outputs of the first and second low-pass filters. 8 fifWvnAvS -g-se  l "guide: .other / hy F iJ Figure 1 CrhU / j