CN105496359A - Portal 24 GHz continuous wave human body life detection instrument - Google Patents
Portal 24 GHz continuous wave human body life detection instrument Download PDFInfo
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- CN105496359A CN105496359A CN201510869475.9A CN201510869475A CN105496359A CN 105496359 A CN105496359 A CN 105496359A CN 201510869475 A CN201510869475 A CN 201510869475A CN 105496359 A CN105496359 A CN 105496359A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
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- Public Health (AREA)
- Heart & Thoracic Surgery (AREA)
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Abstract
The invention discloses a portal 24 GHz continuous wave human body life detection instrument. The portal 24 GHz continuous wave human body life detection instrument comprises a transmitter, a transmitting antenna connected with the transmitter, a receiver front end, a receiving antenna connected with the receiver front end, an AD converter, an analog signal conditioning circuit module in front of the AD converter, a digital signal processor behind the AD converter, a display terminal and a DC/DC power supply module used for supplying power through a portable power source. A K-LC2 radar detection instrument module is adopted in the transmitter, the transmitting antenna connected with the transmitter, the receiver front end and the receiving antenna connected with the receiver front end. A programmable amplifier and a Butterworth filter are adopted in the analog signal conditioning circuit module. C8051f350 single-chip microcomputers are adopted in the AD converter and the digital signal processor behind the AD converter. The display terminal has the digital signal processing function. The DC/DC power supply module is connected with the K-LC2 radar detection instrument module, the analog signal conditioning circuit module and the C8051f350 single-chip microcomputers. The detection instrument is small in size, portable and low in cost.
Description
Technical field
The present invention relates to a kind of life-detection instrument, be specifically related to a kind of portable 24GHz continuous wave human life survey meter, for contact-free detection human life signal.
Background technology
Contactless human life survey meter is a kind of survey meter utilizing radio magnetic wave human body vital signs.Compared to traditional contact human life survey meter, such as electrode etc. need not directly be touched human body by this survey meter, avoids the discomfort causing human body, and the long-term vital signs being particularly suitable for the constant old man of action and child is monitored.In addition, utilize electromagnetic penetrance, can detect the existence of life by partition wall, this survey meter can also be used for rescue such as such as fire-fighting, earthquake etc.Therefore, since 20 century 70s, people have carried out large quantity research to human life survey meter.For avoiding the degradation of the detection accuracy caused because of " zero point " problem in detection process, survey meter adopts orthogonal I/Q to design usually.In recent years, in order to make the detection accuracy of human life survey meter higher, so that more effectively medical care can be applied to.The research of people mainly concentrates in three in Hardware Design: (1) radar emission wave frequency is developed to high frequency by low frequency: 2.4GHz is to 5.8GHz, 10Hz, 24GHz, even 35GHz development, because frequency is higher, electromagnetic wavelength is shorter, and the sensitivity of survey meter is higher.(2) ADC resolution is developed by 16bit to 24bit, and sampling rate adopted employing KHz magnitude image data.Because resolution is higher, receiver signal to noise ratio is higher.Acquisition rate is higher, and signal quantization signal to noise ratio is corresponding also higher.(3) for the ease of using, the heavy weight system integration of large volume develops to high density integrated circuit having.The signal processing algorithm that the survey meter of these higher sensitivities coordinates effective heart rate to extract, will improve the life detection precision of survey meter largely.
But current portable 24GHz human life survey meter exists following problem from portable and practicality aspect: custom-made mode taked by (1) 24GHz dual-mode antenna, size is comparatively large, and cost is higher.(2) 24bitADC adopts special independent ADC individual chips or capture card such as TexasInstrumentADS1251 to realize, and cost is higher, and adds integration complexity.(3) power supply adopts 220V transformator to realize or large volume lithium battery, cannot really accomplish portable and lightweight design.
Summary of the invention
In order to solve the problem, the invention provides a kind of portable 24GHz continuous wave human life survey meter, this survey meter may be used for contact-free detection human life signal, has the advantage that volume is little, portable, cost is low.
Above-mentioned purpose is achieved by the following technical solution:
A kind of portable 24GHz continuous wave human life survey meter, the DC/DC power module comprising the analog signal conditioner circuit module before transmitter and connected transmitting antenna, receiver front end and connected reception antenna, a/d converter, a/d converter, digital signal processor after a/d converter, display terminal and power with portable power source; Local oscillator LO signal is delivered to receiver front end by transmitter, receiver front end exports I/Q two paths of signals to analog signal conditioner circuit module, analog signal conditioner circuit module is divided into I/Q two paths of signals again after the signal filtering received being amplified and flows to a/d converter, a/d converter is divided into I/Q two paths of signals again after converting the analogue signal received to digital signal and flows to digital signal processor, finally exports display terminal display to; Wherein, described transmitter and connected transmitting antenna, receiver front end and connected reception antenna adopt K-LC2 radar detector module, described analog signal conditioner circuit module adopts programmable amplifier and Butterworth wave filter, digital signal processor after described a/d converter and a/d converter adopts C8051f350 single-chip microcomputer, and described display terminal is the display terminal with digital signal processing function; Described DC/DC power module is connected with K-LC2 radar detector module, analog signal conditioner circuit module and C8051f350 single-chip microcomputer respectively.
K-LC2 radar detector module improves survey meter integrated level, simplifies design, can power by direct+5V, directly to the signal down coversion that antenna receives, exports analog baseband signal.Digital signal processor after a/d converter and a/d converter adopts C8051f350 single-chip microcomputer can meet the AD conversion requirement of human life survey meter on the one hand, preliminary treatment can be carried out on the other hand to the digital signal after AD conversion, than adopting, special high resolution A/D converter design is simple, and cost is low.The latter linked display terminal with digital signal processing function of C8051f350 single-chip microcomputer can do digital signal and processes and show further.The display terminal with digital signal processing function is easy to obtain, and simplifies the design of survey meter, and be convenient to the integrated level improving survey meter, volume is little, portable and cost is low.
Further, described programmable amplifier is the two-way programmable amplifier of 100 times.
Further, described Butterworth wave filter is quadravalence Butterworth wave filter.Quadravalence Butterworth is adopted to realize the filtering of low pass 30Hz.
Further, the display terminal described in digital signal processing function is mobile phone or computer.
Further, described C8051f350 single-chip microcomputer turns ethernet module by its serial ports or external serial ports and to be sent in mobile phone or computer by the signal after preliminary treatment and to do further signal processing and show.
Further, turning wireless ethernet module with serial ports replaces described serial ports to turn ethernet module.Turn wireless ethernet module with serial ports to replace described serial ports to turn ethernet module conveniently realizing remote transmission.There is this module a large amount of on the market, price less than 100 yuan.
Further, K-MC3 radar detector module is adopted to replace K-LC2 radar detector module.RFbeam provides the 24GHz radar front end module of a large amount of different beams, in order to the sensitivity of the gain and receiver that improve antenna, other RFBeam radar transceiver front-end such as K-MC3 can be selected to replace K-LC2, because K-MC3 carries amplifier, can further improve the sensitivity of survey meter.
Further, described analog signal conditioner circuit module is also provided with DC filter or adjustable DC biasing circuit.The baseband output signal of receiver front end comprises large Clutter, the resolution gathered to make AD is the highest, analog signal conditioner circuit module place should add DC filter or adjustable DC biasing circuit, and the DC bias signal amplitude that I/Q base band is exported is at the half place of the inner maximum voltage (2.5V) of the AD of C8051f350.
Beneficial effect of the present invention:
(1) transmitter, transmitting antenna, receiver front end and reception antenna adopt K-LC2 radar detector module to realize, and this module can be powered by direct+5V, only has 1 yuan of coin-size, improves level of integrated system, simplify system design.
(2) the present invention does not adopt special high-resolution a/d converter, and directly adopts C8051f350 chip microcontroller.The advantage of this single-chip microcomputer be carry two-way 24bit with difference ADC, the highest sampling rate is 1Ksps, meets the ADC requirement of human life survey meter completely.This single-chip microcomputer Rom is 8K, after can doing simple process, turns ethernet module, be directly sent in mobile phone or computer and do further signal processing by the serial ports of single-chip microcomputer or external serial ports two ways of digital signals, extracts breathing and the palmic rate of human body.In addition, this single-chip microcomputer is cheap, about 16 yuan a slices.
(3) due to the fast development of mobile terminal, occurred various portable power source, the present invention directly can adopt portable power source, provides miniUSB mouth to input as power supply, really realizes portable.
Accompanying drawing explanation
Fig. 1 is the theory of constitution frame diagram of human life survey meter provided by the invention;
Fig. 2 is the measurement data display figure of human life survey meter provided by the invention.
Detailed description of the invention
Technical scheme of the present invention is described in detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of portable 24GHz continuous wave human life survey meter, the DC/DC power module comprising the analog signal conditioner circuit module before transmitter and connected transmitting antenna, receiver front end and connected reception antenna, a/d converter, a/d converter, digital signal processor after a/d converter, display terminal and power with portable power source; Local oscillator LO signal is delivered to receiver front end by transmitter, receiver front end exports I/Q two paths of signals to analog signal conditioner circuit module, analog signal conditioner circuit module is divided into I/Q two paths of signals again after the signal filtering received being amplified and flows to a/d converter, a/d converter is divided into I/Q two paths of signals again after converting the analogue signal received to digital signal and flows to digital signal processor, finally exports display terminal display to; Wherein, described transmitter and connected transmitting antenna, receiver front end and connected reception antenna adopt K-LC2 radar detector module, described analog signal conditioner circuit module adopts two-way programmable amplifier and the quadravalence Butterworth wave filter of 100 times, digital signal processor after described a/d converter and a/d converter adopts C8051f350 single-chip microcomputer, described display terminal is the display terminal with digital signal processing function, as mobile phone or computer; Described DC/DC power module is connected with K-LC2 radar detector module, analog signal conditioner circuit module and C8051f350 single-chip microcomputer respectively.
K-LC2 radar detector module improves survey meter integrated level, simplifies design, can power by direct+5V, directly to the signal down coversion that antenna receives, exports analog baseband signal.Digital signal processor after a/d converter and a/d converter adopts C8051f350 single-chip microcomputer can meet the AD conversion requirement of human life survey meter on the one hand, preliminary treatment can be carried out on the other hand to the digital signal after AD conversion, than adopting, special high resolution A/D converter design is simple, and cost is low.The latter linked display terminal with digital signal processing function of C8051f350 single-chip microcomputer can do digital signal and processes and show further.Described C8051f350 single-chip microcomputer turns ethernet module by its serial ports or external serial ports and to be sent in mobile phone or computer by the signal after preliminary treatment and to do further signal processing and show.The display terminal that mobile phone or computer etc. have digital signal processing function is easy to obtain, and simplifies the design of survey meter, and be convenient to the integrated level improving survey meter, volume is little, portable and cost is low.The filtering of low pass 30Hz can be realized by quadravalence Butterworth wave filter.
Fig. 2 is the measurement data display figure of human life survey meter provided by the invention.Human body is still in 50cm place before survey meter, and the two-way human life signal recorded, can see having obvious periodicity.
Conveniently realize remote transmission, wireless ethernet module can be turned with serial ports and replace described serial ports to turn ethernet module.Turn wireless ethernet module with serial ports to replace described serial ports to turn ethernet module conveniently realizing remote transmission.There is this module a large amount of on the market, price less than 100 yuan.
In order to improve the sensitivity of survey meter further, K-MC3 radar detector module can be adopted to replace K-LC2 radar detector module.RFbeam provides the 24GHz radar front end module of a large amount of different beams, in order to the sensitivity of the gain and receiver that improve antenna, other RFBeam radar transceiver front-end such as K-MC3 can be selected to replace K-LC2, because K-MC3 carries amplifier, can further improve the sensitivity of survey meter.
In order to improve the resolution that AD gathers, described analog signal conditioner circuit module can also be provided with DC filter or adjustable DC biasing circuit.The baseband output signal of receiver front end comprises large Clutter, the resolution gathered to make AD is the highest, analog signal conditioner circuit module place should add DC filter or adjustable DC biasing circuit, and the DC bias signal amplitude that I/Q base band is exported is at the half place of the AD maximum voltage (2.5V) of C8051f350.
In human life survey meter provided by the invention, transmitter, transmitting antenna, receiver front end and reception antenna adopt K-LC2 radar detector module to realize, and improve level of integrated system, simplify system design.The present invention does not adopt special high-resolution a/d converter, and directly adopts C8051f350 chip microcontroller.The advantage of this single-chip microcomputer be carry two-way 24bit with difference ADC, the highest sampling rate is 1Ksps, meets the ADC requirement of human life survey meter completely.This single-chip microcomputer Rom is 8K, after can doing simple process, turns ethernet module, be directly sent in mobile phone or computer and do further signal processing by the serial ports of single-chip microcomputer or external serial ports two ways of digital signals, extracts breathing and the palmic rate of human body.In addition, this single-chip microcomputer is cheap, about 16 yuan a slices.In addition, the present invention directly can adopt portable power source, provides miniUSB mouth to input as power supply, really realizes portable.
The effect of above-described embodiment is essentiality content of the present invention is described, but does not limit protection scope of the present invention with this.Those of ordinary skill in the art should be appreciated that and can modify to technical scheme of the present invention or equivalent replacement, and does not depart from essence and the protection domain of technical solution of the present invention.
Claims (8)
1. a portable 24GHz continuous wave human life survey meter, is characterized in that: the DC/DC power module comprising the analog signal conditioner circuit module before transmitter and connected transmitting antenna, receiver front end and connected reception antenna, a/d converter, a/d converter, digital signal processor after a/d converter, display terminal and power with portable power source; Local oscillator LO signal is delivered to receiver front end by transmitter, receiver front end exports I/Q two paths of signals to analog signal conditioner circuit module, analog signal conditioner circuit module is divided into I/Q two paths of signals again after the signal filtering received being amplified and flows to a/d converter, a/d converter is divided into I/Q two paths of signals again after converting the analogue signal received to digital signal and flows to digital signal processor, finally exports display terminal display to; Wherein, described transmitter and connected transmitting antenna, receiver front end and connected reception antenna adopt K-LC2 radar detector module, described analog signal conditioner circuit module adopts programmable amplifier and Butterworth wave filter, digital signal processor after described a/d converter and a/d converter adopts C8051f350 single-chip microcomputer, and described display terminal is the display terminal with digital signal processing function; Described DC/DC power module is connected with K-LC2 radar detector module, analog signal conditioner circuit module and C8051f350 single-chip microcomputer respectively.
2. portable 24GHz continuous wave human life survey meter according to claim 1, is characterized in that: described programmable amplifier is the two-way programmable amplifier of 100 times.
3. portable 24GHz continuous wave human life survey meter according to claim 1, is characterized in that: described Butterworth wave filter is quadravalence Butterworth wave filter.
4. portable 24GHz continuous wave human life survey meter according to claim 1, is characterized in that: described in there is digital signal processing function display terminal be mobile phone or computer.
5. portable 24GHz continuous wave human life survey meter according to claim 4, is characterized in that: described C8051f350 single-chip microcomputer turns ethernet module by its serial ports or external serial ports and to be sent in mobile phone or computer by the signal after preliminary treatment and to do further signal processing and show.
6. portable 24GHz continuous wave human life survey meter according to claim 5, is characterized in that: turn wireless ethernet module with serial ports and replace described serial ports to turn ethernet module.
7. portable 24GHz continuous wave human life survey meter according to claim 1, is characterized in that: adopt K-MC3 radar detector module to replace K-LC2 radar detector module.
8. portable 24GHz continuous wave human life survey meter according to claim 1, is characterized in that: described analog signal conditioner circuit module is also provided with DC filter or adjustable DC biasing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510869475.9A CN105496359A (en) | 2015-12-02 | 2015-12-02 | Portal 24 GHz continuous wave human body life detection instrument |
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| CN201510869475.9A CN105496359A (en) | 2015-12-02 | 2015-12-02 | Portal 24 GHz continuous wave human body life detection instrument |
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| CN105496359A true CN105496359A (en) | 2016-04-20 |
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| CN201510869475.9A Pending CN105496359A (en) | 2015-12-02 | 2015-12-02 | Portal 24 GHz continuous wave human body life detection instrument |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093901A (en) * | 2016-06-08 | 2016-11-09 | 北京理工大学 | A kind of radar vibration measuring sensitivity computing method |
| CN106264501A (en) * | 2016-10-13 | 2017-01-04 | 杭州电子科技大学 | A kind of bio-signal acquisition system based on continuous wave Doppler radar |
| CN106405542A (en) * | 2016-10-10 | 2017-02-15 | 康佳集团股份有限公司 | Life sign detection processing method and system based on continuous waves, and life detector |
| CN108401137A (en) * | 2018-02-09 | 2018-08-14 | 湖南正申科技有限公司 | A kind of portable audio video life detection instrument based on wireless transmission |
| WO2022006862A1 (en) * | 2020-07-10 | 2022-01-13 | 深圳市速腾聚创科技有限公司 | Laser receiving circuit and laser radar |
| CN114660666A (en) * | 2022-04-29 | 2022-06-24 | 任志强 | Handheld cigarette detector with penetration scanning imaging radar |
-
2015
- 2015-12-02 CN CN201510869475.9A patent/CN105496359A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093901A (en) * | 2016-06-08 | 2016-11-09 | 北京理工大学 | A kind of radar vibration measuring sensitivity computing method |
| CN106405542A (en) * | 2016-10-10 | 2017-02-15 | 康佳集团股份有限公司 | Life sign detection processing method and system based on continuous waves, and life detector |
| CN106264501A (en) * | 2016-10-13 | 2017-01-04 | 杭州电子科技大学 | A kind of bio-signal acquisition system based on continuous wave Doppler radar |
| CN108401137A (en) * | 2018-02-09 | 2018-08-14 | 湖南正申科技有限公司 | A kind of portable audio video life detection instrument based on wireless transmission |
| CN108401137B (en) * | 2018-02-09 | 2020-03-10 | 湖南正申科技有限公司 | Portable audio and video life detection instrument based on wireless transmission |
| WO2022006862A1 (en) * | 2020-07-10 | 2022-01-13 | 深圳市速腾聚创科技有限公司 | Laser receiving circuit and laser radar |
| CN114341667A (en) * | 2020-07-10 | 2022-04-12 | 深圳市速腾聚创科技有限公司 | Laser receiving circuit and laser radar |
| CN114341667B (en) * | 2020-07-10 | 2023-08-04 | 深圳市速腾聚创科技有限公司 | Laser receiving circuit and laser radar |
| US11835650B2 (en) | 2020-07-10 | 2023-12-05 | Suteng Innovation Technology Co., Ltd. | Laser receiving circuit and LiDAR wherein the reverse DC voltage signals from a DC bias circuit and the AC voltage signals from an amplifier circuit are superimposed |
| CN114660666A (en) * | 2022-04-29 | 2022-06-24 | 任志强 | Handheld cigarette detector with penetration scanning imaging radar |
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Application publication date: 20160420 |
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