CN-224220137-U - Respiratory induction signal generation system and respiratory induction plethysmograph device

CN224220137UCN 224220137 UCN224220137 UCN 224220137UCN-224220137-U

Abstract

The utility model discloses a respiratory induction signal generation system and a respiratory induction plethysmograph device, belonging to the technical field of medical monitoring, wherein the system comprises a guide coil, a first interface and a second interface, wherein the guide coil is attached to the chest and abdomen of a living body in a surrounding way; the device comprises a first interface, a second interface, an inversion unit, a counting unit, a filtering amplification unit and a filtering amplification unit, wherein the input end of the inversion unit is connected with the second interface, the output end of the inversion unit is connected with the first interface, the input end of the counting unit is connected with the output end of the inversion unit, the filtering amplification unit is connected with the output end of the counting unit, when the first interface of the conducting coil is connected with the second interface, the conducting coil generates an oscillating signal according to inductance periodic variation caused by chest and abdomen movement, the inversion unit generates a high-frequency excitation pulse according to the oscillating signal, the counting unit counts and encodes the high-frequency excitation pulse to generate a frequency signal, and the filtering amplification unit filters and amplifies the frequency signal to obtain a respiration induction signal. The utility model realizes ultra-low power consumption respiration induction plethysmography.

Inventors

YANG JIAN
LIU WANHUA

Assignees

武汉脑电传感器科技有限公司

Dates

Publication Date: 20260512
Application Date: 20241230

Claims (10)

1. A respiratory sense signal generation system, comprising: a conductive coil, which is attached around the chest and abdomen of the organism and comprises a first interface and a second interface; The input end of the inverting unit is connected with the second interface, and the output end of the inverting unit is connected with the first interface; the input end of the counting unit is connected with the output end of the inverting unit; The input end of the filtering amplifying unit is connected with the output end of the counting unit; When the first interface and the second interface of the lead coil are connected, the lead coil generates an oscillating signal according to the inductance periodic variation caused by chest and abdomen movement, the inverting unit generates a high-frequency excitation pulse according to the oscillating signal, the counting unit counts and encodes the high-frequency excitation pulse to generate a frequency signal, and the filtering and amplifying unit filters and amplifies the frequency signal to obtain a respiration induction signal.
2. The respiratory-sensing signal generation system of claim 1, wherein the inverting unit comprises a six-way inverter, a MOS transistor, a first resistor, and a first capacitor; One end of the first resistor and one end of the first capacitor are connected with the input pins of the six-way inverter, the other end of the first capacitor is grounded, and the other end of the first resistor is grounded after being connected with the grounding pins of the six-way inverter; The grounding pin of the six-path inverter is connected with the drain electrode of the MOS tube, the source electrode of the MOS tube is grounded, and the grid electrode of the MOS tube is connected with the input end of the filtering amplifying unit; When the first interface and the second interface of the guide coil are connected, the guide coil, the first resistor and the first capacitor form an LRC resonance unit, and an oscillation signal is input to the input pins of the six-way inverter.
3. The respiratory-sensing signal generation system of claim 2, further comprising a multivibrator unit; the multivibrator unit comprises a multivibrator, a second resistor and a second capacitor; the input pin of the multivibrator is connected with the output end of the counting unit, one end of the second resistor and one end of the second capacitor are connected with the timing pin of the multivibrator, the other end of the second resistor is externally connected with a working power supply, the other end of the second capacitor is grounded, the reverse output pin of the multivibrator is connected with the grid electrode of the MOS tube and then is connected with the input end of the filtering amplifying unit, and the forward output pin of the multivibrator is connected with the binary counter after being connected.
4. A breath sensing signal generation system according to claim 3, wherein the counting unit comprises a binary counter; The counting pins of the binary counter are connected with the first interface of the lead coil and the output pins of the six-way inverter, the reset input pin of the binary counter is connected with the forward output pin of the multivibrator, and the output pin of the binary counter is connected with the input pin of the multivibrator.
5. The respiratory-sensing signal generation system of claim 4, wherein the filtering amplification unit comprises a first low-pass filtering amplification subunit, a first blocking capacitor, and a second low-pass filtering subunit; The first low-pass filtering amplifying subunit, the first blocking capacitor and the second low-pass filtering subunit are sequentially connected in series; The input end of the first low-pass filtering amplifying subunit is connected with the output pin of the multivibrator, and the second low-pass filtering subunit outputs a respiration induction signal.
6. The respiratory-sensing signal generation system of claim 5, wherein the first low-pass filtering amplification sub-unit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a third capacitor, a fourth capacitor, and a first amplifier; The first diode is connected in series with the third resistor and then connected in parallel with the fourth resistor, one end of the first diode is connected with an output pin of the multivibrator, the other end of the first diode is connected with an anode pin of an input end of the first amplifier, and a cathode pin of the input end of the first amplifier is grounded through a sixth resistor; the third resistor is grounded through a third capacitor; And after the fifth resistor and the fourth capacitor are connected in parallel, one end of the fifth resistor is connected with the negative electrode pin of the input end of the first amplifier, the other end of the fifth resistor is connected with the positive electrode pin of the output of the first amplifier, and the negative electrode pin of the output of the first amplifier is grounded.
7. The respiratory-sensing signal generation system of claim 6, wherein the second low-pass filtering subunit comprises a ninth resistor, a sixth capacitor, and a second amplifier; One end of the ninth resistor is connected with the first blocking capacitor, and the other end of the ninth resistor is connected with an input positive electrode pin of the second amplifier; one end of the sixth capacitor is connected with the ninth resistor and an input positive pin of the second amplifier, and the other end of the sixth capacitor is grounded; The input negative electrode pin of the second amplifier is connected with the output negative electrode pin of the second amplifier, and the output positive electrode pin of the second amplifier is externally connected with a working power supply.
8. The respiratory-sensing signal generation system of claim 7, wherein the second low-pass filtering subunit further comprises a seventh resistor and an eighth resistor; One end of the seventh resistor and one end of the eighth resistor are connected with the input ends of the first blocking capacitor and the second low-pass filtering subunit, the other end of the seventh resistor is externally connected with a working power supply, and the other end of the eighth resistor is grounded.
9. The respiratory-sensing signal generation system of claim 8, further comprising a second straightening unit; The second blocking unit comprises a tenth resistor, an eleventh resistor, a twelfth resistor, a seventh capacitor and an eighth capacitor; The seventh capacitor, the eleventh resistor and the eighth capacitor are connected in series in sequence and then connected with the twelfth resistor in parallel; One end of the tenth resistor is connected with the output negative electrode pin of the second amplifier, and the other end of the tenth resistor is connected with one end of the seventh capacitor and one end of the twelfth resistor; the seventh capacitor and the eleventh resistor are grounded; And the two ends of the eighth capacitor output respiration induction signals.
10. A respiratory sensing plethysmograph device, comprising a respiratory sensing signal generating system according to any one of claims 1-9, further comprising an elastic member, a connecting member and a plethysmograph unit; The guide coil is in a sine shape and fixedly arranged on the elastic piece, and a first interface and a second interface of the guide coil are respectively arranged at two ends of the elastic piece; the two ends of the connecting piece are respectively connected with a first interface and a second interface of the wire coil; the plethysmograph unit is connected with the output end of the filtering and amplifying unit.

Description

Respiratory induction signal generation system and respiratory induction plethysmograph device Technical Field The utility model relates to the technical field of medical monitoring, in particular to a respiratory induction signal generation system and a respiratory induction plethysmograph device. Background Respiratory induction plethysmographs are widely used in the field of chest and abdomen respiratory motion waveform detection as a noninvasive respiratory detection technique. The detection principle is that a wire coil bent into a wave shape or a sine shape is sewn in an elastic piece, and the wire is used as an inductance element of a capacitive three-point resonance circuit. When the human body generates respiratory motion, the chest and abdomen generate periodic fluctuation change to enable the inductance value of the lead to generate periodic change, the change of the inductance value of the lead can cause the change of the resonance point, and the self-inductance change detection of the coil is realized through frequency discrimination or detection, so that the chest and abdomen respiratory wave conversion is realized. The conductor can also be used as a pure inductive load, high-frequency excitation is applied to two ends of the conductor, and the waveform change of the two ends of the conductor is detected. In the prior art, a high frequency excitation current needs to be applied across the wire. The prior high-frequency excitation source needs to be provided with a special excitation source circuit independently, the circuit structure is complex, the power consumption is high, the manufacturing cost is increased along with the circuit structure, and the whole processing circuit module is large. Therefore, a respiratory induction signal generating system and a respiratory induction plethysmograph device are urgently needed to solve the technical problems of complex circuit structure and high power consumption in the prior art. Disclosure of utility model In view of the foregoing, it is necessary to provide a respiratory sensing signal generating system and a respiratory sensing plethysmograph device for solving the technical problems of complex circuit structure and high power consumption in the prior art. To achieve the above object, in one aspect, the present utility model provides a respiration sensing signal generating system, including: a conductive coil, which is attached around the chest and abdomen of the organism and comprises a first interface and a second interface; The input end of the inverting unit is connected with the second interface, and the output end of the inverting unit is connected with the first interface; the input end of the counting unit is connected with the output end of the inverting unit; The input end of the filtering amplifying unit is connected with the output end of the counting unit; When the first interface and the second interface of the lead coil are connected, the lead coil generates an oscillating signal according to the inductance periodic variation caused by chest and abdomen movement, the inverting unit generates a high-frequency excitation pulse according to the oscillating signal, the counting unit counts and encodes the high-frequency excitation pulse to generate a frequency signal, and the filtering and amplifying unit filters and amplifies the frequency signal to obtain a respiration induction signal. In one possible implementation manner, the inverting unit comprises six paths of inverters, a MOS tube, a first resistor and a first capacitor; One end of the first resistor and one end of the first capacitor are connected with the input pins of the six-way inverter, the other end of the first capacitor is grounded, and the other end of the first resistor is grounded after being connected with the grounding pins of the six-way inverter; The grounding pin of the six-path inverter is connected with the drain electrode of the MOS tube, the source electrode of the MOS tube is grounded, and the grid electrode of the MOS tube is connected with the input end of the filtering amplifying unit; When the first interface and the second interface of the guide coil are connected, the guide coil, the first resistor and the first capacitor form an LRC resonance unit, and an oscillation signal is input to the input pins of the six-way inverter. In one possible implementation, the device further comprises a multivibrator unit; the multivibrator unit comprises a multivibrator, a second resistor and a second capacitor; the input pin of the multivibrator is connected with the output end of the counting unit, one end of the second resistor and one end of the second capacitor are connected with the timing pin of the multivibrator, the other end of the second resistor is externally connected with a working power supply, the other end of the second capacitor is grounded, the reverse output pin of the multivibrator is connected with the grid electrode of the MOS tube and the