CN204950951U - Breathe signal detection device - Google Patents
Breathe signal detection device Download PDFInfo
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- CN204950951U CN204950951U CN201520710593.0U CN201520710593U CN204950951U CN 204950951 U CN204950951 U CN 204950951U CN 201520710593 U CN201520710593 U CN 201520710593U CN 204950951 U CN204950951 U CN 204950951U
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The utility model discloses a breathe signal detection device, include singlechip, sine wave signal source generator, separate straight amplifier, VI transfer circuit, instrument amplifier, full wave rectifier circuit and band pass filter, all setting up two electrodes on VI transfer circuit and the instrument amplifier and being used for connecting human cavity, the VI transfer circuit is still connected and is separated straight amplifier, and full wave rectifier circuit is still connected to the instrument amplifier, sine wave signal source generator and AD converter are connected simultaneously to the singlechip, still connect band pass filter between AD converter and full wave rectifier circuit, it connects between VI transfer circuit and sine wave signal source generator to separate straight amplifier. The utility model discloses an above -mentioned principle need not to use the sensor also can observe clear stable breathing impedance curve, and contact resistance has further improved measured data's accuracy to measuring -signal's interference in the testing process.
Description
Technical field
This utility model relates to Intensive Care Therapy field, is specifically related to breath signal checkout gear.
Background technology
Since the custodial care facility appearance of the simple function that 20 century 70s have, it just progressively obtains the extensive use of clinical monitoring.But the custodial care facility of simple function is due to the limitation of its monitoring function, far can not meet the needs of clinical practice, seriously constrain the rescue of hospital to numerous critical patients.Enter the nineties, along with the development of sensing technology and electronic technology, monitored parameters is on the increase, and is guarded develop into multi-parameter monitoring by the single parameter in past.Such as guarded by single cardiac monitoring, blood pressure monitoring, blood oxygen saturation, progressively develop into the multi-parameter monitor comprising electrocardio, breathing, blood pressure, blood oxygen saturation, body temperature, End-tidal carbon dioxide, cardiac output and anesthetic gases analysis etc., these equipment just play positive effect in the diagnosis of hospital clinical.Nowadays in the process detected breath signal, need the auxiliary sensor that uses just can record respiratory impedance curve, and existing checkout gear in use contact resistance measuring-signal is had a negative impact, the final accuracy measured breath signal and detect of impact.
Utility model content
This utility model overcomes the deficiencies in the prior art, breath signal checkout gear is provided, this checkout gear also can observe steady and audible respiratory impedance curve without the need to using sensor, and contact resistance, to the interference of measuring-signal, further increases the accuracy of measurement data in testing process.
For solving above-mentioned technical problem, this utility model is by the following technical solutions: breath signal checkout gear, comprise single-chip microcomputer, sine wave signal source generator, every straight amplifier, V/I translation circuit, instrument amplifier, full-wave rectifying circuit and band filter, described V/I translation circuit with instrument amplifier is all arranged two electrodes for being connected body cavity, V/I translation circuit also connects every straight amplifier, and instrument amplifier also connects full-wave rectifying circuit; Described single-chip microcomputer connects sine wave signal source generator and A/D converter simultaneously, goes back connecting band bandpass filter between A/D converter and full-wave rectifying circuit; Describedly to be connected between V/I translation circuit and sine wave signal source generator every straight amplifier.The sine wave source of 50kHz is obtained by Single-chip Controlling sine wave signal source generator, by after the DC component of straight amplifier filtering sinusoidal signal, signal is just obtained the sine wave source of the 50kHz of standard after exchanging and amplifying, more just can be obtained the sinusoidal wave constant-current source of 1mA of 50kHz by V/I translation circuit.This constant-current source is applied on torso model, what obtain from measurement electrode two ends is a high-frequency am signal modulated by breath signal, recycling instrument amplifier amplifies detection signal, then full-wave rectifying circuit is utilized to carry out demodulation to high-frequency am signal, detect the envelope of high-frequency signal amplitude change, this envelope is the signal with impedance variation, most relief impedance change signal is by the band filter of 0.08Hz ~ 10Hz, filtering DC component and high frequency spurs interference, just can obtain the prototype of breath signal, after breath signal digitized, utilize to further process in embedded computer system and just can obtain breath signal.This device uses other sensors also can observe steady and audible respiratory impedance curve without the need to additionally assisting, V/I translation circuit in this device with instrument amplifier is all arranged two electrodes for being connected body cavity, four electrode constant-current driving methods are adopted to carry out, substantially reduce contact resistance to the impact of measuring breath signal, improve the accuracy of measurement result.
The model of described single-chip microcomputer is C8051F020.This single-chip microcomputer is a kind of mixed-signal system level single-chip microcomputer that Cygnal goes out.Sheet includes the CPU core of CIP-51, and its instruction system and MCS-51 are completely compatible.C8051F020 single-chip microcomputer wherein contains Flash program storage in 64kB sheet, and the RAM of 4352B, 8 I/O ports be the part such as the programmable count/Timer Array of totally 64 I/O mouth lines, 12 A/D converters and 8 A/D converters and two 12 D/A converters, 2 comparators, 5 16 general purpose timers, 5 seizure/comparison modules, WatchDog Timer, VDD monitor and temperature sensor.Doubleclocking supported by C8051F020 single-chip microcomputer, and its operating voltage range is 2.7 ~ 3.6V(port I/O, and the withstand voltage of RST and JTAG pin is 5V).Compared with 51 former series monolithics, C8051F020 adds many functions, and its reliability and speed there has also been large increase simultaneously, uses the monolithic function of this model to improve breath signal and detect several times in this device.
The model of described sine wave signal source generator is AD9833.This waveform generator can produce the periodic signal of random waveform, the frequency amplitude of the flexible control signal of energy, phase place, and in very wide scope quick switching frequency, there is high-resolution export, use DDS technique construction frequency signal source, the signal frequency of continuous accurate adjustment can be obtained, amplitude phase controlling is convenient, and memory capacity is large; It is few that AWG accounts for microsystem resource, improves the response speed of device.
The model of described instrument amplifier is PCA206.The instrument amplifier of this model can be satisfied the demand completely.
Compared with prior art, the beneficial effects of the utility model are:
1, the V/I translation circuit in this device with instrument amplifier is all arranged two electrodes for being connected body cavity, adopt four electrode constant-current driving methods to carry out, substantially reducing contact resistance to measuring the impact of breath signal, improve the accuracy of measurement result.
2, this device uses other sensors also can observe steady and audible respiratory impedance curve without the need to additionally assisting.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Detailed description of the invention
Be further elaborated this utility model below in conjunction with accompanying drawing, embodiment of the present utility model is not limited thereto.
Embodiment 1:
As shown in Figure 1, this utility model comprise single-chip microcomputer, sine wave signal source generator, every straight amplifier, V/I translation circuit, instrument amplifier, full-wave rectifying circuit and band filter, described V/I translation circuit with instrument amplifier is all arranged two electrodes for being connected body cavity, V/I translation circuit also connects every straight amplifier, and instrument amplifier also connects full-wave rectifying circuit; Described single-chip microcomputer connects sine wave signal source generator and A/D converter simultaneously, goes back connecting band bandpass filter between A/D converter and full-wave rectifying circuit; Describedly to be connected between V/I translation circuit and sine wave signal source generator every straight amplifier.
The sine wave source of 50kHz is obtained by Single-chip Controlling sine wave signal source generator, by after the DC component of straight amplifier filtering sinusoidal signal, signal is just obtained the sine wave source of the 50kHz of standard after exchanging and amplifying, more just can be obtained the sinusoidal wave constant-current source of 1mA of 50kHz by V/I translation circuit.This constant-current source is applied on torso model, what obtain from measurement electrode two ends is a high-frequency am signal modulated by breath signal, recycling instrument amplifier amplifies detection signal, then full-wave rectifying circuit is utilized to carry out demodulation to high-frequency am signal, detect the envelope of high-frequency signal amplitude change, this envelope is the signal with impedance variation, most relief impedance change signal is by the band filter of 0.08Hz ~ 10Hz, filtering DC component and high frequency spurs interference, just can obtain the prototype of breath signal, after breath signal digitized, utilize to further process in embedded computer system and just can obtain breath signal.This device uses other sensors also can observe steady and audible respiratory impedance curve without the need to additionally assisting, V/I translation circuit in this device with instrument amplifier is all arranged two electrodes for being connected body cavity, four electrode constant-current driving methods are adopted to carry out, substantially reduce contact resistance to the impact of measuring breath signal, improve the accuracy of measurement result.
Embodiment 2:
The present embodiment is preferably as follows on the basis of embodiment 1: the model of described single-chip microcomputer is C8051F020.This single-chip microcomputer is a kind of mixed-signal system level single-chip microcomputer that Cygnal goes out.Sheet includes the CPU core of CIP-51, and its instruction system and MCS-51 are completely compatible.C8051F020 single-chip microcomputer wherein contains Flash program storage in 64kB sheet, and the RAM of 4352B, 8 I/O ports be the part such as the programmable count/Timer Array of totally 64 I/O mouth lines, 12 A/D converters and 8 A/D converters and two 12 D/A converters, 2 comparators, 5 16 general purpose timers, 5 seizure/comparison modules, WatchDog Timer, VDD monitor and temperature sensor.Doubleclocking supported by C8051F020 single-chip microcomputer, and its operating voltage range is 2.7 ~ 3.6V(port I/O, and the withstand voltage of RST and JTAG pin is 5V).Compared with 51 former series monolithics, C8051F020 adds many functions, and its reliability and speed there has also been large increase simultaneously, uses the monolithic function of this model to improve breath signal and detect several times in this device.
The model of described sine wave signal source generator is AD9833.This waveform generator can produce the periodic signal of random waveform, the frequency amplitude of the flexible control signal of energy, phase place, and in very wide scope quick switching frequency, there is high-resolution export, use DDS technique construction frequency signal source, the signal frequency of continuous accurate adjustment can be obtained, amplitude phase controlling is convenient, and memory capacity is large; It is few that AWG accounts for microsystem resource, improves the response speed of device.
The model of described instrument amplifier is PCA206.The instrument amplifier of this model can be satisfied the demand completely.
Just this utility model can be realized as mentioned above.
Claims (4)
1. breath signal checkout gear, it is characterized in that: comprise single-chip microcomputer, sine wave signal source generator, every straight amplifier, V/I translation circuit, instrument amplifier, full-wave rectifying circuit and band filter, described V/I translation circuit with instrument amplifier is all arranged two electrodes for being connected body cavity, V/I translation circuit also connects every straight amplifier, and instrument amplifier also connects full-wave rectifying circuit; Described single-chip microcomputer connects sine wave signal source generator and A/D converter simultaneously, goes back connecting band bandpass filter between A/D converter and full-wave rectifying circuit; Describedly to be connected between V/I translation circuit and sine wave signal source generator every straight amplifier.
2. breath signal checkout gear according to claim 1, is characterized in that: the model of described single-chip microcomputer is C8051F020.
3. breath signal checkout gear according to claim 1, is characterized in that: the model of described sine wave signal source generator is AD9833.
4. breath signal checkout gear according to claim 1, is characterized in that: the model of described instrument amplifier is PCA206.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520710593.0U CN204950951U (en) | 2015-09-15 | 2015-09-15 | Breathe signal detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520710593.0U CN204950951U (en) | 2015-09-15 | 2015-09-15 | Breathe signal detection device |
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| CN204950951U true CN204950951U (en) | 2016-01-13 |
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| CN201520710593.0U Active CN204950951U (en) | 2015-09-15 | 2015-09-15 | Breathe signal detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105054935A (en) * | 2015-09-15 | 2015-11-18 | 成都汉康信息产业有限公司 | Respiration signal detecting terminal |
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- 2015-09-15 CN CN201520710593.0U patent/CN204950951U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105054935A (en) * | 2015-09-15 | 2015-11-18 | 成都汉康信息产业有限公司 | Respiration signal detecting terminal |
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