CN102988051B - Device for monitoring health of computer operator - Google Patents
Device for monitoring health of computer operator Download PDFInfo
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- CN102988051B CN102988051B CN201210538902.1A CN201210538902A CN102988051B CN 102988051 B CN102988051 B CN 102988051B CN 201210538902 A CN201210538902 A CN 201210538902A CN 102988051 B CN102988051 B CN 102988051B
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Abstract
The invention discloses a device and a method for monitoring the health of a computer operator; the device comprises a micro-power bio-radar front end used for radiating a narrow pulse signal to the computer operator in a non-contact way; a breath or heartbeat echo signal which is reflected by the chest wall of the computer operator is output into a universal serial bus (USB) acquisition card by the micro-power bio-radar front end through variable delay and related detection; and output of the USB acquisition card is connected with a data processing module used for result displaying and controlling. The method for monitoring the health of the computer operator can be used for detecting the breath signal and the heartbeat signal of the computer operator in a non-contact way and processing by a variable delay line, adaptive filtering, autocorrelation analysis, power spectrum estimation and the like, thus effectively inhibiting other movement interference of the operator, accurately monitoring the respiratory rate and the heart rate of the computer operator, comparing the respiratory rate and the heart rate with the preset threshold values, and giving out an alarm for prompting or automatically turning off a computer so as to force the computer operator to have a rest.
Description
Technical field
The present invention relates to a kind of monitoring device and method of health, particularly a kind of device and method that carrys out monitoring computer operator health by non-contact detecting breathing rate or heart rate.
Background technology
Along with the raising of scientific and technological level, modern handle official bussiness compartment syndrome, particularly " high-tech disease " becomes modern job disease gradually.Computer can be described as one of greatest invention in this century, there is it, all there is epoch-making change in the mode of people's work, life, study, along with popularizing of network and computer, people are more and more stronger for the dependence of computer, many people bend over one's desk working all day before computer, indulge in the internet world of unlimited communication.But it brings all whiles easily to people, has also brought worry thereupon, and people worry to be engaged in for a long time computer work more or less can be to the many harmful effects of healthy generation.Expert thinks, people's worry is not worried too much, according to investigations, that in the people of conventional computer, feels eyestrain accounts for 83%, that takes on sour lumbago accounts for 63.9%, headache and inappetence account for 56.1% and 54.4%, also there is vegetative dystonie, melancholia, arteriosclerostic psychosis etc. in other.
About computer operation person's health monitoring technology, because it is to preventing the development prospect of the sick aspect of computer to be subject to the attention of various countries' height, research worker has been carried out many-sided research according to the variation characteristic of operator's physiological signal.Computer operation person's health monitor method can roughly be divided into (1) physiologic signal monitoring method based on wearable technology; (2) the physiologic signal monitoring method based on video technique.
In said method, wearable technology is that bio-signal acquisition technology is merged mutually with the medicated clothing of the daily wearing of people, make it under naturalness, realize obtaining and non-invasive monitoring of physiological signal, the physiological signal that can obtain mainly comprises brain electrocardio (ECG), breathing, body temperature, blood pressure etc.The method is higher to the judgment accuracy of computer operation person's health status, but in testing process, need to dress the medicated clothing of implanting multiple sensors, and keep as far as possible human body static, in the time of the health monitoring that is actually used in computer operation person, there is a lot of limitation, therefore be mainly used in the experimental stage, as the control parameters of experiment.
Physiologic signal monitoring method based on video technique refers to the measured's of the deduction such as eye movement characteristic, head movement characteristic that utilizes operator health status.The method generally adopts non-contact measurement, better to the accuracy of detection of health status, but checkout equipment is expensive, algorithm is complicated, also can only be used for the laboratory research stage.
Summary of the invention
The object of this invention is to provide a kind of to computer operation person without constraint, non-contacting breathing rate or heart rate monitoring unit, can, in not affecting operator's work, realize monitoring and warning to its health status.
For reaching above object, the present invention takes following technical scheme to be achieved:
A kind of monitoring device for computer operation person's health, it is characterized in that, comprise to the micropower bioradar front end of computer operator's noncontact radiation narrow pulse signal, the breathing that this micropower bioradar front end reflects computer operation person's thoracic wall or the echo-signal of heart beating export USB capture card to through variable delay and coherent detection, the data processing module that shows and control for result in the output access computer of USB capture card; Described data processing module comprises digital filtering unit, numerical value extraction unit and numerical value comparing unit, wherein, after the breathing that digital filtering unit is sent USB capture card here or heart beating numeral signal adaptive filtering, makes breathing or heartbeat signal become clean and level and smooth; Numerical value extraction unit obtains breathing rate or heart rate numerical value by filtered breathing or heartbeat signal by auto-correlation processing and power Spectral Estimation, numerical value comparing unit compares this breathing rate or heart rate numerical value with the breathing rate threshold value or the heart rate threshold that pre-set, and prompting is abnormal and warning.
In said apparatus, described micropower bioradar front end is by signal source, burst pulse wave-shaping circuit, variable delay line circuit, correlation detecting circuit, integrator and differentiator form, the narrow pulse sequence that burst pulse wave-shaping circuit wherein produces is through external transmitting antenna radiation computer operator, the echo-signal of narrow pulse sequence is modulated in the thoracic wall fine motion being caused by its breathing or heart beating, enter coherent detection and variable delay line circuit carries out demodulation through external reception antenna, then pass through integrator, the pulse accumulation of differentiator, fine motion detects breathing after detecting or heartbeat signal enters USB capture card, USB capture card on the one hand will enter data processing module in computer and complete demonstration and the warning of breathing rate or heart rate after the breathing of simulation or heartbeat signal digitized, export on the other hand the low and high level of 8 variable delay line circuit is controlled, realize the tomoscan of distance, external transmitting antenna and reception antenna and operator's chest distance is no more than 0.5 meter.
The narrow pulse sequence that described burst pulse wave-shaping circuit produces is the 250ps microwave pulse sequence signal after shaping.
The time constant of described integrator is 30s, and the time constant of differentiator is 0.5 second.
A monitoring method for computer operation person's health, adopts the aforementioned monitoring device for computer operation person's health to realize, and it is characterized in that, comprises the steps:
(1) first, service data process software in data processing module, carries out hardware check to micropower bioradar front end and usb data capture card, automatic breathing or the heartbeat signal that creates filename and start acquisition operations person in the time that hardware is ready;
(2) then carry out low pass FIR filtering or heart beating path is with to logical FIR filtering breathing path, filtered two paths of signals extracts operator's breathing rate or heart rate after self correlation and AR model power Spectral Estimation, and wherein breathing rate is to extract 1 time for every 30 seconds; Heart rate is to extract 1 time for every 5 seconds;
(3) get the breathing rate of first 10 minutes meansigma methods 75% as breathing rate threshold value; Get first 10 minutes heart rate meansigma methods 75% as heart rate threshold, follow-up breathing rate and the comparison of breathing rate threshold value; Or the instantaneous value of follow-up heart rate and heart rate threshold compare,
(4) when the continuous situation that is greater than threshold value for 3 times appears in operator's breathing rate or heart rate, data processing module carries out audible alarm automatically, and prompting operation person preserves the program or the text that are moving, makes computer system automatically close software and shut down within several minutes.
In said method, described low pass FIR filtering, its cut-off frequency is 0.5Hz.The logical FIR filtering of described band, its cut-off frequency that rolls off the production line is 0.6Hz, upper cut-off frequency is 2.5Hz.
Compared with existing computer operation person's health supervision device and method, the present invention has the following advantages:
1, owing to adopting micropower bioradar front end, without any device or wire contact computer operation person, wireless completely from the reception that is transmitted into of signal, can in 0.5 meter, realize the monitoring of the breath signal to computer operation person, in testing process to it without any constraint, having overcome the long-time monitoring of touch sensor or electrode easily increases mental workload and the objective evaluation of unhealthful state.
2,, owing to having adopted apart from layer scanning technology, there is very strong anti motion interference ability.Setting after operating distance scanning impulse, except the breathing and heartbeat signal of human body, other motion artifacts are all suppressed effectively, therefore have very high motion artifacts and suppress ability.
3, breathing rate and heart rate detection are accurate.Traditional wired breathing or electrocardiograph monitoring device need bandage or electrode to be tied to computer operation person's breast abdominal part, the athletic meeting of breast abdominal part produces the accuracy that affects breathing rate and heart rate detection compared with large baseline drift, and the error that causes heart rate and breathing rate is 4-6 beat/min.And monitoring device of the present invention is breathed or the detection of heartbeat signal is not subject to the impact of baseline drift, and the detection of breathing rate or heart rate adopts auto-correlation processing, self-adapting detecting to merge mutually with power spectrum, and the detection error of breathing rate or heart rate is 1-2 beat/min.
4, install and use flexibly.The hardware components of computer operation person's health monitoring device adopts USB Power supply, and can be clipped in computer screen or put and stand on desktop; Software section is installed brief introduction, convenience, only program need be opened and carry out miniaturization demonstration when use, does not affect the normal operation of computer.
5, computer operation person's health monitor method of the present invention, by non-contact detecting operator's breath signal and heartbeat signal, adopt the processing such as vairable delay line, adaptive-filtering, autocorrelation analysis and power Spectral Estimation, can effectively suppress other motion artifacts of tester, monitor computer operation person's breathing rate or heart rate, and relatively carry out alarm or automatically shut down computer with default threshold value, force to allow computer operation person have a rest.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and the specific embodiment, the present invention is described in further detail.
Fig. 1 is the functional block diagram of apparatus of the present invention.
Fig. 2 is the circuit theory diagrams of the micropower bioradar front end in Fig. 1.
Fig. 3 is the flow chart of data processing figure in the data processing module in Fig. 1.
Fig. 4 is a computer operation person's breath signal and power spectrum.Wherein (a) figure is respiratory waveform; (b) figure is spectrum analysis.
The specific embodiment
As shown in Figure 1, a kind of monitoring device for computer operation person's health, comprise to the micropower bioradar front end of computer operator's noncontact radiation narrow pulse signal, the breathing that this micropower bioradar front end reflects computer operation person's thoracic wall or the echo-signal of heart beating export USB capture card to through variable delay and coherent detection, and the data processing module for result demonstration and control accessing after breathing and heartbeat signal digitized in computer is carried out follow-up software processes by USB capture card; Provide 8 bit digital height the flat vairable delay line of controlling in micropower bioradar front end simultaneously, realize the tomoscan of distance, and to provide+5V of whole hardware system power supply.
Micropower bioradar front end comprises pulse signal source, burst pulse wave-shaping circuit, variable delay line circuit, correlation detecting circuit, integrator and differentiator.Micropower bioradar front end produces the narrow pulse sequence of 250ps through external transmitting antenna tan1 radiation computer operator, by the thoracic wall fine motion of breathing or heart beating causes, the echo-signal of narrow pulse sequence is modulated, enter coherent detection and variable delay line circuit carries out demodulation through external reception antenna tan2, then after detecting, detect and breathe or heartbeat signal enters USB capture card by pulse accumulation, the fine motion of integrator, differentiator.USB capture card on the one hand will enter data processing module in computer (being extracted and numeric ratio forms by adaptive-filtering, numerical value) and complete demonstration and the alarm of breathing rate or heart rate after the breathing of simulation or heartbeat signal digitized; The low and high level of exportable 8 is controlled vairable delay line on the other hand.The power supply of micropower bioradar front end is by provide+5V of USB.
Data processing module comprises adaptive digital filtering, numerical value extracts (breathing rate and heart rate detection) and numeric ratio, adaptive digital filtering becomes clean and level and smooth by noisy breathing or heartbeat signal, numerical value extracts the numerical value that obtains breathing rate or heart rate by auto-correlation processing and power Spectral Estimation, breathing rate threshold value or heart rate threshold last and that pre-set compare, in the time that appearance is abnormal, preserve prompting and report to the police, after continuing to report to the police 1 minute, automatically shutting down computer.
The physical circuit of micropower bioradar front end can adopt circuit structure as shown in Figure 2.Wherein pulse signal source is by crystal oscillator G1, gate circuit D1A-D3A and RC circuit R1, C1, and R2, C2 form, the TTL square wave that its output signal is standard, and frequency is 6MHz; The square wave that narrow pulse forming circuit adopts snap-off diode V1 to produce signal source carries out shaping, this diode can produce extremely short train of pulse of persistent period (tens ns) under the effect of sinusoidal signal, and burst pulse is again through excitation inductance L1(nH level micro-band inductance) be shaped as the fast pulse of 250ps.Variable delay line circuit is AD9501 by phase inverter D5A and D8A, special IC D1(model), the fixed delay device of RC forms, variable delay line circuit by with 8 low and high level controls, its step-length is 0.15ns, and range accuracy can reach 22.5mm; Correlation detecting circuit is actually a burst pulse and adopts guarantor's circuit, mainly formed by sampling diode V3 and capacitor C 14, transmit after certain delay (being equivalent in a certain distance), sample to received signal, if in this distance, there is a static target, after certain hour accumulation, will produce a direct current signal, if target is moved, after accumulation, will obtain an AC signal, i.e. Doppler signal.Sampling diode is selected the diode that the selector switch time is little, parasitic component is little, and electric capacity selects charge constant to be greater than the pulse width of sampling pulse, the cycle that discharge time constant is greater than sampling pulse.Integrator accumulates the output signal of correlation detecting circuit, and after thousands of pulse accumulation, faint echo signal is detected; Differentiator carries out differential to the output signal of integrator, if there is no moving target, the output signal of differentiator is a fixed value, if there is moving target, differentiator the change-detection of the accumulation signal causing due to target travel out.Wherein the time constant of integrator (being made up of N1, C11 and R9) is 30s, and differentiator (being made up of C10, N2 and R8) time constant is 0.5 second, guarantees by the fine motion signal detection of operator's breathing or heart beating out.The output of micropower bioradar front end is less than 0.01 microwatt, and operating distance is less than 0.5 meter.
As shown in Figure 3, the data processing module in computer to the handling process of USB capture card input data is:
First, service data process software, carries out hardware check to micropower bioradar front end and usb data capture card, automatically creates filename and start to gather to breathe or heartbeat signal in the time that hardware is ready; Then carry out low pass FIR(finite impulse response to breathing path) filtering (cut-off frequency is 0.5Hz) or heart beating path is with to logical FIR filtering (cut-off frequency that rolls off the production line is 0.6Hz, upper cut-off frequency is 2.5Hz), filtered two paths of signals is through self correlation and AR(autoregression) extract breathing rate or heart rate after model power Spectral Estimation, wherein breathing rate is to extract 1 time for every 30 seconds; Heart rate is to extract 1 time for every 5 seconds, get the breathing rate of first 10 minutes or heart rate meansigma methods 75% as threshold value; Follow-up breathing rate or the instantaneous value of heart rate and threshold value compare, be greater than the situation of threshold value if occur continuously 3 times, software carries out audible alarm automatically, prompting operation person preserves the program or the text that are moving, after 1 minute, automatically close software and computer, force to allow computer operation person have a rest.
As shown in Figure 4, adopt computer operation person's health monitoring device of the present invention the breath signal under normal condition to be detected.Antenna and operator's chest distance is 0.5 meter, and without any cable or sensor body contact, waveform result shows that now in breath signal power spectrum, corresponding crest frequency is 0.2188Hz, and now corresponding breathing rate is 13 beats/min.
Claims (3)
1. the monitoring device for computer operation person's health, it is characterized in that, comprise to the micropower bioradar front end of computer operator's noncontact radiation narrow pulse signal, the breathing that this micropower bioradar front end reflects computer operation person's thoracic wall or the echo-signal of heart beating export USB capture card to through variable delay and coherent detection, the data processing module that shows and control for result in the output access computer of USB capture card; Described data processing module comprises digital filtering unit, numerical value extraction unit and numerical value comparing unit, wherein, after the breathing that digital filtering unit is sent USB capture card here or heart beating numeral signal adaptive filtering, makes breathing or heartbeat signal become clean and level and smooth; Numerical value extraction unit obtains breathing rate or heart rate numerical value by filtered breathing or heartbeat signal by auto-correlation processing and power Spectral Estimation, numerical value comparing unit compares this breathing rate or heart rate numerical value with the breathing rate threshold value or the heart rate threshold that pre-set, and prompting is abnormal and warning;
Described micropower bioradar front end is by signal source, burst pulse wave-shaping circuit, variable delay line circuit, correlation detecting circuit, integrator and differentiator form, the narrow pulse sequence that burst pulse wave-shaping circuit wherein produces is through external transmitting antenna radiation computer operator, the echo-signal of narrow pulse sequence is modulated in the thoracic wall fine motion being caused by its breathing or heart beating, enter coherent detection and variable delay line circuit carries out demodulation through external reception antenna, then pass through integrator, the pulse accumulation of differentiator, fine motion detects breathing after detecting or heartbeat signal enters USB capture card, USB capture card on the one hand will enter data processing module in computer and complete demonstration and the warning of breathing rate or heart rate after the breathing of simulation or heartbeat signal digitized, export on the other hand the low and high level of 8 variable delay line circuit is controlled, realize the tomoscan of distance, external transmitting antenna and reception antenna and operator's chest distance is no more than 0.5 meter.
2. the monitoring device for computer operation person's health as claimed in claim 1, is characterized in that, the narrow pulse sequence that described burst pulse wave-shaping circuit produces is the 250ps microwave pulse sequence signal after shaping.
3. the monitoring device for computer operation person's health as claimed in claim 1, is characterized in that, the time constant of described integrator is 30s, and the time constant of differentiator is 0.5 second.
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| CN201210538902.1A CN102988051B (en) | 2012-12-13 | 2012-12-13 | Device for monitoring health of computer operator |
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| CN109729632A (en) * | 2018-12-29 | 2019-05-07 | 深圳市铂越科技有限公司 | A kind of illuminator and its control method |
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| CN106999105B (en) * | 2014-11-28 | 2019-10-18 | 夏普株式会社 | High-frequency device |
| CN105640531A (en) * | 2015-12-29 | 2016-06-08 | 惠州Tcl移动通信有限公司 | Pulse measuring method and system based on pressure touch screen and mobile terminal |
| CN106073783B (en) * | 2016-06-23 | 2024-02-20 | 桂林航天工业学院 | Method for extracting respiration rate from photoplethysmography wave |
| WO2018050913A1 (en) * | 2016-09-19 | 2018-03-22 | Resmed Sensor Technologies Limited | Apparatus, system, and method for detecting physiological movement from audio and multimodal signals |
| CN108697352B (en) * | 2017-06-29 | 2021-04-20 | 深圳和而泰智能控制股份有限公司 | Physiological information measuring method, physiological information monitoring device and equipment |
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| CN109009126A (en) * | 2018-06-25 | 2018-12-18 | 上海浦东新区爱照护老年人公益发展中心 | A kind of non-contact intelligent breathing arrangement for detecting and method for detecting |
| CN112889095A (en) * | 2018-10-26 | 2021-06-01 | 京瓷株式会社 | Monitoring device, monitoring method, and monitoring program |
| CN109407090A (en) * | 2018-12-14 | 2019-03-01 | 昆明天博科技有限公司 | Biont information is extracted to alarm switch control device and method using bioradar |
| CN111938613B (en) * | 2020-08-07 | 2023-10-31 | 南京茂森电子技术有限公司 | Health monitoring device and method based on millimeter wave radar |
| CN113633271B (en) * | 2021-10-18 | 2021-12-31 | 北京卓建智菡科技有限公司 | Human body activity state detection method, device, equipment and storage medium |
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| GB2349759A (en) * | 1999-04-19 | 2000-11-08 | Autoliv Celsius Ab | Radar heartbeat monitor |
| CN2529267Y (en) * | 2002-03-15 | 2003-01-01 | 中国人民解放军第四军医大学 | Radar non-contact life parameter detecting device |
| DE10259522A1 (en) * | 2002-12-19 | 2004-07-01 | Robert Bosch Gmbh | Radar-based sensing of the position and / or movement of the body or in the body of living beings |
| AU2004290588A1 (en) * | 2003-11-18 | 2005-06-02 | Vivometrics, Inc. | Method and system for processing data from ambulatory physiological monitoring |
| CN100453043C (en) * | 2007-01-23 | 2009-01-21 | 武汉理工大学 | System for real-time monitoring of fatigue of driver of automobile |
| CN102819725A (en) * | 2011-06-07 | 2012-12-12 | 鸿富锦精密工业（深圳）有限公司 | System and method for detecting fatigue state |
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| CN109729632A (en) * | 2018-12-29 | 2019-05-07 | 深圳市铂越科技有限公司 | A kind of illuminator and its control method |
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