RU2098918C1 - Pulse burst shaping device - Google Patents

Abstract

FIELD: pulse technique; pulse generators and medical apparatuses. SUBSTANCE: device has two identical channels each incorporating series-connected phase shifter, one-shot multivibrator, modulator, and amplifier-shaper; phase shifter input functions as data input of channel and amplifier-shaper output, as channel output. Device also has infralow-frequency oscillator, clock generator, and display unit; infralow-frequency oscillator output is connected to data input of channels in BURN-IN mode; display unit input is connected to second output of one-shot multivibrator of each channel clock generator output is connected to clock inputs of channels which function as second modulator inputs in each channel. EFFECT: enlarged functional capabilities. 4 dwg

Description

 The invention relates to pulse technology and can be used in pulse generators, including medical electronic devices - electrical stimulators for correcting muscle function in pathological conditions of the musculoskeletal system, for example, such as the effects of polio, cerebral palsy.

 A device for correcting movements on and.with. USSR N 1681866 from 10.31.89, cl. A 61 N 1/36, containing a power supply, a first motion phase sensor, a threshold element, an inverter, a first delay unit, a pack duration shaper, a second motion phase sensor, a second delay unit, a pulse generator, a pulse width shaper, an amplifier, a voltage converter.

 Known shaper packs of pulses by a. from. USSR N 1443139 dated 04.20.87, cl. H 03 K 3/64, comprising a clock bus, a pulse counter, triggers, OR elements, a switch, frequency dividers, an output bus. The well-known shaper of impulses is used in electrical stimulators of organs and tissues.

 Known shaper series of pulses by a. from. USSR N 1307548 from 12.19.85, cl. H 03 K 3/64, containing a key with storing the control signal, the information input of which is connected to the clock pulse bus, and the first output and control input are connected respectively to the first output bus and the direct output of the trigger, the S-input of which is connected to the trigger bus, The R-input is connected to the second output bus and the output of the frequency divider, the control inputs and the counting input of which are connected respectively to the control buses and the third output bus. The pulse train generator also contains an additional key with storing the control signal, an additional frequency divider, an EXCLUSIVE OR element, an OR element, a start bus.

 Known shaper packs of pulses by a. from. USSR N 1429301 dated 11.03.86, cl. H 03 K 3/64, containing a pulse generator, frequency dividers, counters, a group of AND elements, comparison units, a conversion unit, an AND element, an inverter, a trigger, an output bus. The pulse shaper is used in respiratory stimulants.

 Known orthopedic apparatus with an electronic control circuit (Prosthetics and prosthetics, M. TsNIIPP, 1987, issue 80, pp. 123-127). The electronic stimulator is a two-channel electronic device with an autonomous power source. Each channel contains three controllers (the delay time of the stimulating signal relative to the timing of the synchronization sensor, the duration of the output pulse train, pulse repetition rate), mode switches, voltage amplitude switches of the stimulating signal, signal intensity regulators, and a power source.

A known electronic device for correcting walking on prostheses, comprising a training generator, a synchronization sensor, two channels, each of which contains a delay unit, a pulse train shaper, a stimulating pulse shaper. In addition, the device contains a symmetric trigger, a clock, an OR element, AND elements, a stimulation indicator, output stages, a transformer (prototype) [1]
In FIG. 1 shows a block diagram of a device; figure 2 timing diagrams of the operation of the device; figure 3 circuit diagram of the device; figure 4 is a real waveform of a single pulse of the proposed device (solid line) and the prototype (dashed line. On the plot of the waveform of the proposed device and the prototype, the dashed line for convenience is conventionally shown next to the solid line).

 In FIG. 1 shows the input 1 of an external synchronization sensor, a generator 2 of infra-low-frequency (GINCH) oscillations, channels I and II, each of which contains a 3-phase regulator, a single vibrator 4, a modulator 5, an amplifier-shaper 6, an output of the 7th channel, an output of 8 II channel. In addition, figure 1 shows the display unit 9 and the clock generator 10 (in this case, a low frequency generator).

 Input 1 is intended for receiving a signal from an external stimulation synchronization sensor in the "correction" mode.

 GINCH 2 is designed to form muscle stimulation commands in the "training" mode.

 Figure 3 shows: GINCH 2, which includes the elements HE 11, HE 12, resistor 13, resistor 14, capacitor 15.

 GTI 10, which includes elements HE 16, HE 17, resistors 18, 19, 20, capacitor 21.

 Channel I (II), which includes a 3-phase controller, a single-shot 4, a modulator 5, an amplifier-shaper 6.

 The phase 3 controller contains a D-trigger 22 (23), a resistor 24 (25), a capacitor 26 (27).

 The one-shot 4 contains a D-flip-flop 28 (29), a resistor 30 (31), a capacitor 32 (33), a diode 34 (35).

 The amplifier-driver 6 contains a capacitor 36 (39), a resistor 38 (39), a resistor 49 (41), a transistor 42 (43), a transformer 44 (45), a resistor 46 (48), a resistor 47 (49), a diode 50 ( 51).

 Modulator 5 contains element HE 52 (53), resistor 54 (55).

 The display unit contains a resistor 56, a resistor 57, a transistor switch 58, a resistor 59, an LED 60.

 Figure 3 also shows the storage capacitor 61, the resistor 62, points 63 and 64 connecting the power source, connectors 65-67, switch K2: Contacts "5" and "6" of the connector (signal "SIN") are used to connect an external synchronization sensor to input 1.

The device operates as follows:
Depending on the position of the K1 switch, the input signal of channels I and II is either a signal from an external synchronization sensor (“correction” mode) or rectangular pulses from GINCH 2 continuously (with a frequency of 0.3 Hz) (training mode). The input signal in the Correction mode is synchronized with the movements of the joint.

 The negative edge of the input signal switches the C-input of the D-flip-flop 22 (23) of the 3-phase controller to a low logic level, initiating the start of a single-vibrator 4 adjustable within 0 1 s of the time delay and, accordingly, the beginning of the formation of a stimulating pulse train. After this time delay, the phase 3 controller starts the one-shot 4, which sets the duration of the output pulse train. Resistor 30 (31) can be adjusted within 50 1250 ms. From the output of the one-shot 4, the pulse is fed to the first input of the modulator 5, the second input of which is constantly fed with clock pulses from the GTI 10 with a frequency set in the range from 40 to 80 Hz. When adjusting the total duration of a packet of clock pulses cut out by the modulator 5 within 50 to 120 ms, the number of individual clock pulses in it can, therefore, be from 2 to 100.

 The packet of clock pulses from the GTI 10, modulated by modulator 5, is fed to the input of the amplifier-driver 6. The clock pulses of the package along its leading edge open the transistor switch 42 (43), which is available in the amplifier-driver 6, which discharges the storage capacitor 61 through the primary winding of the transformer 44 (45) and thus forms output pulses. The transformer 44 (45) of the amplifier-former 6 provides an increase in the voltage of the output pulses and galvanic isolation of the output and control circuits of the device.

 The amplitude adjustment in the range from 0 to 105 V is carried out using resistive dividers 46, 47 (48, 49), included as a secondary load of the transformer 44 (45).

 The display unit 9 is connected in an OR circuit to both channels. Using the transistor switch 58 for the duration of the generation of the pulse packet in any of the channels, the LED 60 located on the front panel of the device is turned on. The glow of the LED 60 thus indicates the active state of the device.

соответствует входному сигналу "SIN" от внешнего датчика синхронизации в режиме "коррекция". Следующая диаграмма

соответствует входному сигналу каналов, вырабатываемому ГИНЧ 2 (режим "коррекция"). Фронт "SYN" показан совпадающим с отрицательным фронтом ГИНЧ 2 условно, для удобства и в режиме "коррекция" приводит к формированию лишь одного из представленных на диаграммах

и

пакетов (в интервалах времени t2 t5), в то время как режим "тренировка" соответствует диаграммам

полностью.Timing diagrams of the signals at the corresponding points in the block diagram are shown in FIG. The top two charts are an alternative. First chart

corresponds to the input signal "SIN" from an external synchronization sensor in the "correction" mode. Next chart

corresponds to the input signal of the channels generated by GINCH 2 ("correction" mode). The front "SYN" is shown coinciding with the negative front of GINCH 2 conditionally, for convenience and in the "correction" mode, it leads to the formation of only one of the diagrams

and

packets (in time intervals t2 t5), while the "training" mode corresponds to the diagrams

completely.

The implementation of the proposed device creates the prerequisites for the development of the correct motor stereotype due to improved coordination ratios of activity of antagonist muscles;
provides artificial control of movements of various difficulty levels;
the indirect effect is a decrease in reflex muscle tone in the treatment of patients with systemic disorders of muscle tone, as well as when changing the functioning conditions of tendon and muscle reflectors.

 Smooth adjustment of the amplitude of the output pulses within 0 105 V is most consistent with the physiological sensitivity to voltage pulses.

Claims (1)

 A device for generating bursts of pulses, comprising an infra-low frequency generator, a clock generator, an indicator, two identical channels, each of which contains an amplifier-driver, the output of the generator of low-frequency frequency connected to the information input of each channel, and the output of the amplifier-driver is an output of the channel, characterized in that a phase regulator, a single vibrator and a modulator are introduced in series into each channel, the input of the phase regulator being an information input of each Nala, and the output of the modulator is connected to the input of the amplifier-driver, the clock pulse generator output is connected to a clock input of each channel, which is the second input of the modulator, the display unit input connected to the output indication of each channel, which is the second output of the monostable.

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