CN102988051A - Device and method for monitoring health of computer operator - Google Patents
Device and method for monitoring health of computer operator Download PDFInfo
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- CN102988051A CN102988051A CN2012105389021A CN201210538902A CN102988051A CN 102988051 A CN102988051 A CN 102988051A CN 2012105389021 A CN2012105389021 A CN 2012105389021A CN 201210538902 A CN201210538902 A CN 201210538902A CN 102988051 A CN102988051 A CN 102988051A
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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 comes monitoring computer operator health by non-contact detecting breathing rate or heart rate.
Background technology
Along with the raising of scientific and technological level, the modern handle official bussiness compartment syndrome, particularly " high-tech is sick " becomes the modern job disease gradually.Computer can be described as one of greatest invention in this century, it has been arranged, epoch-making change has all appearred 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 before computer all day, indulge in the internet world of unlimited communication.But it brings all easily whiles 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.The expert thinks, people's worry is not to worry too much, according to investigations, that feels eyestrain among the people of conventional computer accounts for 83%, that takes on sour lumbago accounts for 63.9%, the headache and inappetence then account for 56.1% and 54.4%, other vegetative dystonie, melancholia, arteriosclerostic psychosis etc. also occur.
About computer operation person's health monitoring technology, owing to it is subject to the attention of various countries' height to the development prospect of the sick aspect of prevention computer, 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) based on the physiologic signal monitoring method of wearable technology; (2) based on the physiologic signal monitoring method of video technique.
In the said method, wearable technology is that the medicated clothing of bio-signal acquisition technology with the daily wearing of people merged mutually, make it realize obtaining and non-invasive monitoring of physiological signal under naturalness, 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 need to dress the medicated clothing of implanting multiple sensors in the testing process, and keep as far as possible human body static, a lot of limitation is arranged when the health monitoring that is actually used in computer operation person, therefore be mainly used in the experimental stage, as the control parameters of experiment.
Refer to utilize the measured's that operator's eye movement characteristic, head movement characteristic etc. infer health status based on the physiologic signal monitoring method of video technique.The method generally adopts non-contact measurement, and is 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 purpose 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 when not affecting operator's work, realize monitoring and warning to its health status.
For reaching above purpose, 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, this micropower bioradar front end exports the USB capture card to the breathing of computer operation person's thoracic wall reflection or the echo-signal of heart beating to through variable delay and coherent detection, the data processing module that is used for result's demonstration and control 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, makes behind the breathing that the digital filtering unit is sent the USB capture card here or the heart beating numeral signal adaptive filtering and breathes or heartbeat signal becomes clean and level and smooth; The numerical value extraction unit obtains breathing rate or heart rate numerical value with filtered breathing or heartbeat signal by auto-correlation processing and power Spectral Estimation, the 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 unusual and warning.
In the said apparatus, described micropower bioradar front end is by signal source, the burst pulse wave-shaping circuit, the variable delay line circuit, correlation detecting circuit, integrator and differentiator consist of, the narrow pulse sequence that burst pulse wave-shaping circuit wherein produces is through external transmitting antenna radiation computer operator, by the thoracic wall fine motion that its breathing or heart beating cause the echo-signal of narrow pulse sequence is modulated, enter coherent detection and the variable delay line circuit carries out demodulation through external reception antenna, then pass through integrator, the pulse accumulation of differentiator, detect after fine motion detects and breathe or heartbeat signal enters the USB capture card, enter demonstration and warning that data processing module in the computer is finished breathing rate or heart rate behind the breathing that the USB capture card will be simulated on the one hand or the heartbeat signal digitized; Export on the other hand 8 high-low level the 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 the shaping.
The time constant of described integrator is 30s, and the time constant of differentiator is 0.5 second.
A kind of monitoring method of computer operation person's health adopts aforementioned monitoring device for computer operation person's health to realize, it is characterized in that, comprises the steps:
(1) at 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 begin acquisition operations person when hardware is ready;
(2) then carry out low pass FIR filtering or the heart beating path is with logical FIR filtering breathing path, extract operator's breathing rate or heart rate after filtered two paths of signals process self correlation and the AR model power Spectral Estimation, wherein breathing rate is extraction in per 30 seconds 1 time; Heart rate is extraction in per 5 seconds 1 time;
(3) get front 10 minutes breathing rate meansigma methods 75% as the breathing rate threshold value; Get front 10 minutes heart rate meansigma methods 75% as heart rate threshold, follow-up breathing rate and breathing rate threshold ratio are; Or the instantaneous value of follow-up heart rate and heart rate threshold compare,
(4) continuous 3 situations greater than threshold value appear in breathing rate or the heart rate as the operator, and data processing module carries out audible alarm automatically, and prompting operation person preserves program or the text that is moving, and computer system autoshutdown software is shut down.
In the said method, described low pass FIR filtering, its cut-off frequency is 0.5Hz.Described band leads to FIR filtering, and its cut-off frequency that rolls off the production line is 0.6Hz, and upper cut-off frequency is 2.5Hz.
Compare with existing computer operation person's health supervision device and method, the present invention has the following advantages:
1, owing to adopts micropower bioradar front end, need not any device or wire contact computer operation person, wireless fully from the reception that is transmitted into of signal, can in 0.5 meter, realize the monitoring to computer operation person's breath signal, in the testing process to it without any constraint, having overcome the long-time monitoring of touch sensor or electrode increases mental workload and the objective evaluation of unhealthful state easily.
2, owing to adopted apart from layer scanning technology, has very strong anti motion interference ability.After having set the 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 larger baseline drift and affects the accuracy of breathing rate and heart rate detection, and the error that causes heart rate and breathing rate is 4-6 beats/min.And monitoring device of the present invention is breathed or the detection of heartbeat signal is not subjected 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 beats/min.
4, installation and use are flexibly.The hardware components of computer operation person's health monitoring device adopts the USB Power supply, and can be clipped in computer screen or put and stand on the desktop; Software section is installed brief introduction, convenience, only needs during use program to be opened and carried out the miniaturization demonstration, does not affect the normal operation of computer.
5, computer operation person's health monitor method of the present invention, breath signal and heartbeat signal by the non-contact detecting operator, adopt the processing such as vairable delay line, adaptive-filtering, autocorrelation analysis and power Spectral Estimation, other motion artifacts that can effectively suppress the tester, monitor computer operation person's breathing rate or heart rate, and carry out alarm or autoshutdown computer with default threshold ratio, force to allow computer operation person have a rest.
Description of drawings
The present invention is described in further detail below in conjunction with accompanying drawing and the specific embodiment.
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 among Fig. 1.
Fig. 3 is the flow chart of data processing figure in the data processing module among 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, this micropower bioradar front end exports the USB capture card to the breathing of computer operation person's thoracic wall reflection or the echo-signal of heart beating to through variable delay and coherent detection, the USB capture card will breathe and the heartbeat signal digitized after be used for that the result shows and the data processing module controlled carries out follow-up software processes in the access computer; The just flat vairable delay line of controlling in the micropower bioradar front end of 8 bit digital is provided simultaneously, realizes the tomoscan of distance, and provide+the 5V power supply to whole hardware system.
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 the variable delay line circuit carries out demodulation through external reception antenna tan2, detect after then pulse accumulation, the fine motion by integrator, differentiator detects and breathe or heartbeat signal enters the USB capture card.Enter data processing module (being consisted of by adaptive-filtering, numerical value extraction and numeric ratio) in the computer behind the breathing that the USB capture card will simulate on the one hand or the heartbeat signal digitized and finish demonstration and the alarm of breathing rate or heart rate; Exportable 8 high-low level is controlled vairable delay line on the other hand.The power supply of micropower bioradar front end is provided+5V by 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 with 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, last breathing rate threshold value or heart rate threshold with pre-setting compares, when appearance is unusual, preserve prompting and report to the police autoshutdown computer after continuing to report to the police 1 minute.
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, and its output signal is the TTL square wave of standard, and frequency is 6MHz; Narrow pulse forming circuit adopts snap-off diode V1 that the square wave that signal source produces is carried out shaping, this diode can produce extremely short train of pulse (tens ns) of persistent period under the effect of sinusoidal signal, burst pulse is again through the little band inductance of excitation inductance L1(nH level) be shaped as the fast pulse of 250ps.The variable delay line circuit is AD9501 by phase inverter D5A and D8A, special IC D1(model), the fixed delay device of RC consists of, the variable delay line circuit by with the control of 8 high-low levels, its step-length is 0.15ns, and then 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 through after certain delay (being equivalent on a certain distance), sample to received signal, if in this distance one static target is arranged, then through after the certain hour accumulation, will produce a direct current signal, if target is moved, then after accumulating, will obtain an AC signal, i.e. the Doppler signal.The sampling diode is selected the diode that the selector switch time is little, parasitic component is little, and electric capacity selects charge constant greater than the pulse width of sampling pulse, the discharge time constant cycle greater than sampling pulse.Integrator accumulates the output signal of correlation detecting circuit, is detected through faint echo signal after thousands of the pulse accumulation; Differentiator carries out differential to the output signal of integrator, if there is not moving target, the output signal of differentiator is a fixed value, if moving target is arranged, differentiator the change-detection of the accumulation signal that causes owing to target travel out.Wherein the time constant of integrator (being made of N1, C11 and R9) is 30s, and differentiator (being made of C10, N2 and R8) time constant is 0.5 second, guarantee the operator breathed or the fine motion signal detection of 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 the computer to the handling process of USB capture card input data is:
At first, the service data process software carries out hardware check to micropower bioradar front end and usb data capture card, automatically creates filename and begin to gather to breathe or heartbeat signal when hardware is ready; Then carry out low pass FIR(finite impulse response to breathing path) filtering (cut-off frequency is 0.5Hz) or the heart beating path is with 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 the model power Spectral Estimation, wherein breathing rate is to extract 1 time in per 30 seconds; Heart rate is to extract 1 time in per 5 seconds, get front 10 minutes breathing rate or heart rate meansigma methods 75% as threshold value; Follow-up breathing rate or the instantaneous value of heart rate and threshold value compare, if occur continuously 3 times greater than the situation of threshold value, software carries out audible alarm automatically, prompting operation person preserves program or the text that is moving, autoshutdown software and computer after 1 minute 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 to detect breath signal under the normal condition.Antenna and operator's chest distance is 0.5 meter, need not any cable or sensor body contact, and the waveform result shows that crest frequency corresponding in breath signal power spectrum this moment is 0.2188Hz, and this moment, corresponding breathing rate was 13 beats/mins.
Claims (7)
1. monitoring device that is used 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, this micropower bioradar front end exports the USB capture card to the breathing of computer operation person's thoracic wall reflection or the echo-signal of heart beating to through variable delay and coherent detection, the data processing module that is used for result's demonstration and control 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, makes behind the breathing that the digital filtering unit is sent the USB capture card here or the heart beating numeral signal adaptive filtering and breathes or heartbeat signal becomes clean and level and smooth; The numerical value extraction unit obtains breathing rate or heart rate numerical value with filtered breathing or heartbeat signal by auto-correlation processing and power Spectral Estimation, the 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 unusual and warning.
2. the monitoring device for computer operation person's health as claimed in claim 1, it is characterized in that, described micropower bioradar front end is by signal source, the burst pulse wave-shaping circuit, the variable delay line circuit, correlation detecting circuit, integrator and differentiator consist of, the narrow pulse sequence that burst pulse wave-shaping circuit wherein produces is through external transmitting antenna radiation computer operator, by the thoracic wall fine motion that its breathing or heart beating cause the echo-signal of narrow pulse sequence is modulated, enter coherent detection and the variable delay line circuit carries out demodulation through external reception antenna, then pass through integrator, the pulse accumulation of differentiator, detect after fine motion detects and breathe or heartbeat signal enters the USB capture card, enter demonstration and warning that data processing module in the computer is finished breathing rate or heart rate behind the breathing that the USB capture card will be simulated on the one hand or the heartbeat signal digitized; Export on the other hand 8 high-low level the 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.
3. the monitoring device for computer operation person's health as claimed in claim 2 is characterized in that, the narrow pulse sequence that described burst pulse wave-shaping circuit produces is the 250ps microwave pulse sequence signal after the shaping.
4. the monitoring device for computer operation person's health as claimed in claim 2 is characterized in that, the time constant of described integrator is 30s, and the time constant of differentiator is 0.5 second.
5. the monitoring method of computer operation person's health adopts the monitoring device for computer operation person's health claimed in claim 1 to realize, it is characterized in that, comprises the steps:
(1) at 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 begin acquisition operations person when hardware is ready;
(2) then carry out low pass FIR filtering or the heart beating path is with logical FIR filtering breathing path, extract operator's breathing rate or heart rate after filtered two paths of signals process self correlation and the AR model power Spectral Estimation, wherein breathing rate is extraction in per 30 seconds 1 time; Heart rate is extraction in per 5 seconds 1 time;
(3) get front 10 minutes breathing rate meansigma methods 75% as the breathing rate threshold value; Get front 10 minutes heart rate meansigma methods 75% as heart rate threshold, follow-up breathing rate and breathing rate threshold ratio are; Or the instantaneous value of follow-up heart rate and heart rate threshold compare,
(4) continuous 3 situations greater than threshold value appear in breathing rate or the heart rate as the operator, and data processing module carries out audible alarm automatically, and prompting operation person preserves program or the text that is moving, and computer system autoshutdown software is shut down.
6. the monitoring method of computer operation person's health as claimed in claim 5 is characterized in that, described low pass FIR filtering, and its cut-off frequency is 0.5Hz.
7. the monitoring method of computer operation person's health as claimed in claim 5 is characterized in that, described band leads to FIR filtering, and its cut-off frequency that rolls off the production line is 0.6Hz, and upper cut-off frequency is 2.5Hz.
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| 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 |
| CN111938613A (en) * | 2020-08-07 | 2020-11-17 | 南京茂森电子技术有限公司 | Health monitoring device and method based on millimeter wave radar |
| 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 |
| CN113633271A (en) * | 2021-10-18 | 2021-11-12 | 北京卓建智菡科技有限公司 | Human health state detection method, device, equipment and storage medium |
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