CN102166119A - Single-arm type electrocardio auxiliary fall detector - Google Patents
Single-arm type electrocardio auxiliary fall detector Download PDFInfo
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- CN102166119A CN102166119A CN 201110076423 CN201110076423A CN102166119A CN 102166119 A CN102166119 A CN 102166119A CN 201110076423 CN201110076423 CN 201110076423 CN 201110076423 A CN201110076423 A CN 201110076423A CN 102166119 A CN102166119 A CN 102166119A
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Abstract
The invention provides a single-arm type electrocardio auxiliary fall detector. Aiming at the detection for the special body position change of falls of elderly people, the fall detector can detect electrocardiosignal parameters of a human body simultaneously when monitoring real-time body position change of the human body. A 3D acceleration sensor is adopted for collecting acceleration signals around the human body in real time to monitor the body position change of the human body in all directions, and sending the collected real-time signals to a system control center through a wireless communication protocol ZigBee for storage and analysis. Through the comprehensive analysis on the 3D acceleration sensor and the single-arm type electrocardiosignals, whether a fall event really happens is determined, and then an alarm text message is sent to relatives and friends of a monitored object through a GSM modem. The single-arm type electrocardiosignals collected by the detector are more convenient than the electrocardiosignals collected by traditional limb lead, and the whole collecting terminal equipment only needs four AA batteries for power supply, so as to well meet the wearable and portable requirements.
Description
Technical field
The invention belongs to the medical monitoring equipment technical field, be specifically related to the auxiliary fall detection instrument of a kind of single arm type electrocardio.
Background technology
At present, old people's shared ratio in society increases year by year, and old people's action safety has become the major issue of society.In the face of the problem that the old people falls easily, except realizing strick precaution, when falling situation, most important is exactly to deliver to hospital in the very first time as soon as possible, to reduce injury.
The technology of existing human body fall detection, the fall detection method generally all is based on the situation of falling that various 3D acceleration transducers come the perception human body, with maximum be exactly gyroscope or 3-axis acceleration sensor, because its low price, control is simple, highly sensitive, and sampling is convenient, but can not come comprehensively analytical judgment uniformly in conjunction with other physiologic information parameter of human body.
The mutation situation of the fall phenomenon and the heart rate of human body is closely-related.Traditional electrocardiogram monitor adopts 12 to lead, and 5 lead gathers electrocardiosignal, wants right-hand man and right lower limb to drive this at least and 3 leads and finish the collection of electrocardiosignal.When sampling, just limited electrocardio people's freedom like this.Adopt multi-lead can obtain more ecg information, but at fall detection, the ecg information that the just minority that needs acquires a special sense, such as heart rate, P wave height, the Q ripple S pitch of waves from.Variation to a certain degree can take place in these ecg informations when human body is fallen.
The fall detection system that 3D acceleration module and electrocardiosignal are combined is arranged now, but this system still is the electrocardiogram acquisition mode of traditional limb lead for the collection of electrocardiosignal, electrocardioelectrode is placed in the right-hand man of detected object, and primary signal is introduced acquisition system with the long line that leads, retrain the degree of freedom of detected object so to a great extent, do not realized the characteristics of portable and Wearable truly.
At present, some fall detection devices at the human body fall detection are also arranged, these methods are just passed through to analyze the acceleration change of 3D acceleration transducer on X, Y, Z axle for the evaluation of the situation of falling, and take the detection mode of an aspect, often all can not reach very high monitoring accuracy.
If can adopt the multidimensional detection mode simultaneously, change monitoring human relevant physiological information parameter simultaneously at the monitoring human position, if find the change that all takes place in some sense, judge again, then can improve the fall accuracy of incident of judgement greatly.
Summary of the invention
Deficiency at above-mentioned prior art existence, the present invention aims to provide the auxiliary fall detection instrument of a kind of single arm type electrocardio portable, Wearable, when this detector utilizes the acceleration transducer human body to fall situation, gather valuable electrocardiosignal in real time and come the auxiliary judgment situation of falling, and the data that collect are sent to System Control Center by home control network communication protocol Zigbee.
The auxiliary fall detection instrument of single arm type electrocardio of the present invention comprises power module, 2 road cardiac diagnosis leads, electrocardiosignal conditioning module, acceleration transducer, central processing and transceiver module, two electrode patchs, t-antenna.
Described power module comprises voltage inverter and power regulator;
Described electrocardiosignal conditioning module comprises that preamplifier, bandwidth-limited circuit, main amplification and filter circuit, trap and level raise circuit.
Described bandwidth-limited circuit comprises low-pass filter circuit, high-pass filtering circuit;
Described low-pass filter circuit comprises first operational amplifier, second operational amplifier;
Described high-pass filtering circuit comprises the 3rd operational amplifier;
Described main amplification and filter circuit comprise main amplifying circuit, filter circuit;
Described main amplifying circuit comprises four-operational amplifier;
Described filter circuit comprises the 5th operational amplifier;
Described trap and level are raised circuit and are comprised that trap circuit, level raise circuit;
Described trap circuit comprises the 6th operational amplifier, the 7th operational amplifier;
Described level is raised circuit and is comprised the 8th operational amplifier.
The voltage inverter of described power module and the input of power regulator are the DC input.
Described two electrode patchs connect the two-way input of 2 road cardiac diagnosis leads respectively, and the two-way output of 2 road cardiac diagnosis leads connects positive input terminal, the negative input end of described preamplifier respectively;
The output of described preamplifier is connected with the input of bandwidth-limited circuit;
The output of described bandwidth-limited circuit is connected with the input of main amplification and filter circuit;
The output of described main amplification and filter circuit is connected with the input that trap and level are raised circuit;
The output that described trap and level are raised circuit is connected to that central authorities handle and an input of transceiver module.
The input of described bandwidth-limited circuit is connected with the positive input terminal of first operational amplifier by two series resistances successively, the negative input end of first operational amplifier passes through resistance eutral grounding, the output of first operational amplifier is connected with the positive input terminal of second operational amplifier by two series resistances successively, the negative input end of second operational amplifier passes through resistance eutral grounding, the output of second operational amplifier is connected with the positive input terminal of the 3rd operational amplifier by two series capacitances successively, the negative input end of the 3rd operational amplifier is by resistance eutral grounding, and the output of the 3rd operational amplifier is as the output of band filter.
The output of described band filter is connected with the input of main amplification and filter circuit, the input of main amplification and filter circuit is connected with the positive input terminal of four-operational amplifier, the negative input end of four-operational amplifier passes through resistance eutral grounding, the output of four-operational amplifier is connected by the positive input terminal of resistance with the 5th operational amplifier, the negative input end of the 5th operational amplifier is by resistance eutral grounding, and the output of the 5th operational amplifier is as the output of main amplification and filter circuit.
The output of described main amplification and filter circuit is connected with the input that trap and level are raised circuit, trap and level are raised the input of circuit respectively successively by two series resistances, be connected with the positive input terminal of the 7th operational amplifier by two series capacitances successively, the negative input end of the 7th operational amplifier is connected with the outfan of the 7th operational amplifier, the output of the 7th operational amplifier also is connected by the negative input end of resistance with the 8th operational amplifier, the positive input terminal of the 8th operational amplifier connects potentiometric output, potentiometric two inputs connect power supply respectively, ground, the output of circuit is raised in the output of the 8th operational amplifier as wave trap and level; The output of the 7th operational amplifier is also successively by two series resistance ground connection, and the continuous end of these two series resistances is connected with the positive input terminal of the 6th operational amplifier, the negative input end of the 6th operational amplifier is connected with the outfan of the 6th operational amplifier, and the outfan of the 6th operational amplifier also is connected to the continuous end of two series resistances that the positive input terminal of the 7th operational amplifier connects, is connected to the continuous end of two series capacitances that the positive input terminal of the 7th operational amplifier connects by resistance by electric capacity respectively.
Two sensitivity control ports of described acceleration transducer are connected in two outputs of central authorities' processing and transceiver module by resistance respectively, and acceleration transducer X, Y, the axial output of Z are connected with central authorities' processing and three analog inputs of transceiver module by resistance respectively.
Central authorities handle and the wireless receiving and the transmit port of transceiver module are connected with the carrier wave end of t-antenna, and central authorities handle and the forward radiofrequency signal port and the negative sense radiofrequency signal port of transceiver module are connected with two vibration ends of t-antenna respectively;
Two outfans of central authorities' processing and transceiver module also connect respectively sets up Zigbee network successful connection display lamp, bind request success display lamp.
Beneficial effect of the present invention:
1, general acceleration transducer and single arm type electrocardiosignal are combined,, determine whether the incident of really falling, thereby improved accuracy rate the event recognition of falling simultaneously by analysis to two kinds of physiological signal datas;
2, the collection of electrocardiosignal is different from 12 lead, 5 lead, the 3 traditional electrocardiogram acquisition equipment that lead, the left hand upper arm of only getting guardianship in signal acquisition process can not produce strict restriction to the daily behavior of tutelage object is movable;
3, fall detection instrument volume of the present invention is little, in light weight, and it is convenient to dress, and needs only during use the fall detection instrument is fixed on the left hand upper arm by cuff.
Description of drawings
Fig. 1 is the structured flowchart of fall detection system
The structured flowchart of the auxiliary fall detection instrument of Fig. 2 single arm type electrocardio of the present invention
Fig. 3 is the circuit diagram of power module
Fig. 4 is the circuit diagram of the preamplifier of electrocardiosignal conditioning module
Fig. 5 is the circuit diagram of the bandwidth-limited circuit of electrocardiosignal conditioning module
Fig. 6 is the main amplification of electrocardiosignal conditioning module and the circuit diagram of filter circuit
Fig. 7 raises the circuit diagram of circuit for wave trap and level
Fig. 8 is the circuit diagram of acceleration transducer
Fig. 9 is the circuit diagram of central authorities' processing and transceiver module
Figure 10 is the single arm type electrocardiosignal oscillogram of typical human body
Single arm type electrocardiosignal oscillogram when Figure 11 lies low for human body is in
Single arm type electrocardiosignal oscillogram when Figure 12 stands for human body is in
Figure 13 is the output waveform figure of the 3D acceleration transducer of human body when finishing side direction and fall down
Figure 14 falls down the acceleration waveform figure of brief acceleration pick off output X, Z axle for human body generation side direction
Figure 15 for human body at the output waveform figure of finishing the 3D acceleration transducer of layback when falling down
The acceleration waveform figure that brief acceleration pick off output X, Z axle are fallen down in layback takes place for human body in Figure 16
Figure 17 is the output waveform figure of human body at the 3D acceleration transducer of finishing the crouching time-out
Figure 18 is the output waveform figure of the 3D acceleration transducer of human body when finishing walking
Figure 19 is for correctly laying the sketch map of electrocardioelectrode paster at human body left hand upper arm
Figure 20 is for correctly wearing the sketch map of the auxiliary fall detection instrument of electrocardio of the present invention at human body left hand upper arm
Figure 21 is the central authorities' processing of the auxiliary fall detection instrument of electrocardio of the present invention and the program flow diagram of transceiver module.
The specific embodiment
Describe in further detail originally doing below in conjunction with accompanying drawing.
The auxiliary fall detection instrument of single arm type electrocardio of the present invention comprises that power module 201,2 road cardiac diagnosis leads 202, electrocardiosignal conditioning module 203, acceleration transducer 204, central authorities handle and transceiver module 205, two electrode patchs, t-antenna, as shown in Figure 2.
Described power module 201 comprises voltage inverter U0 and power regulator U13, as shown in Figure 3;
Described electrocardiosignal conditioning module 203 comprises that preamplifier U1, bandwidth-limited circuit, main amplification and filter circuit, trap and level raise circuit, as Fig. 4, Fig. 5, Fig. 6, shown in Figure 7.
Described bandwidth-limited circuit comprises low-pass filter circuit 501, high-pass filtering circuit 502;
Described low-pass filter circuit 501 comprises the first operational amplifier U3, the second operational amplifier U4;
Described high-pass filtering circuit 502 comprises the 3rd operational amplifier U2;
Described main amplification and filter circuit comprise main amplifying circuit 601, filter circuit 602;
Described main amplifying circuit 601 comprises four-operational amplifier U5;
Described filter circuit 602 comprises the 5th operational amplifier U6;
Described trap and level are raised circuit and are comprised that trap circuit, level raise circuit;
Described trap circuit 701 comprises the 6th operational amplifier U7, the 7th operational amplifier U8;
Described level is raised circuit 702 and is comprised the 8th operational amplifier U9.
Wherein: it is MAX828 that voltage inverter is chosen model, and it is AMS1117 that model is chosen in the power supply voltage stabilizing;
It is TJ-ECG-0001 that 2 road cardiac diagnosis leads are chosen model;
It is AD620 that preamplifier is chosen model;
First, second, third, fourth, the 5th, the 6th, the 7th, the 8th operational amplifier is chosen model and is OP07;
Acceleration transducer is chosen the MMA7260 that model is a Freescale company;
Central authorities handle and transceiver module is chosen the CC2430 that model is a TI company;
T-antenna is a T type microstrip antenna;
The voltage inverter MAX828 of described power module 201 and the input of power regulator AMS1117 are No. 5 battery 6V DC of 4 joints, and its output is respectively direct current-6
vWith 3.3
vAbove-mentioned ± 6
vDC voltage be connected respectively to positive and negative power end VCC, the VEE of each operational amplifier in the electrocardiosignal conditioning module 203 as power supply, 3.3
vDC voltage be connected to the power end 3VD3 of acceleration transducer MMA7260 as power supply and central authorities handle and the power end 3VD3 of transceiver module CC2430.
Described two electrode patchs connect the two-way input of 2 road cardiac diagnosis leads 202 respectively, and the two-way output of 2 road cardiac diagnosis leads 202 connects the positive input terminal LH(pin 3 of the preamplifier U1 of described electrocardiosignal conditioning module 203 respectively), negative input end RH(pin 2);
The output OUT1 of described preamplifier is connected with the input OUT1 of bandwidth-limited circuit;
The output OUT2 of described bandwidth-limited circuit is connected with the input OUT2 of main amplification and filter circuit;
The output OUT3 of described main amplification and filter circuit is connected with the input OUT3 that trap and level are raised circuit;
The output ECG_OUT that described trap and level are raised circuit is connected to that central authorities handle and the input ECG_OUT(P0_1 of transceiver module CC2430) on.
As shown in Figure 5, the input OUT1 of described bandwidth-limited circuit is successively by two series resistance R2, R3 is connected with the positive input terminal (pin 3) of the first operational amplifier U3, the negative input end of the first operational amplifier U3 (pin 2) is by resistance R 4 ground connection, the output of the first operational amplifier U3 (pin 6) is successively by two series resistance R6, R7 is connected with the positive input terminal (pin 3) of the second operational amplifier U4, the negative input end of the second operational amplifier U4 (pin 2) is by resistance R 8 ground connection, the output of the second operational amplifier U4 (pin 6) is successively by two series capacitance C11, C12 is connected with the positive input terminal (pin 3) of the 3rd operational amplifier U2, the negative input end of the 3rd operational amplifier U2 (pin 2) is by resistance R 12 ground connection, and the output of the 3rd operational amplifier U2 (pin 6) is as the output OUT2 of band filter.
As shown in Figure 6, the output OUT2 of described band filter is connected with the input OUT2 of main amplification and filter circuit, the input OUT2 of main amplification and filter circuit is connected with the positive input terminal (pin 3) of four-operational amplifier U5, the negative input end of four-operational amplifier U5 (pin 2) is by resistance R 16 ground connection, the output of four-operational amplifier U5 (pin 6) is connected with the positive input terminal (pin 3) of the 5th operational amplifier U6 by resistance R 18, the negative input end of the 5th operational amplifier U6 (pin 2) is by resistance R 19 ground connection, and the output of the 5th operational amplifier U6 (pin 6) is as the output OUT3 of main amplification and filter circuit.
As shown in Figure 7, the output OUT3 of described main amplification and filter circuit is connected with the input OUT3 that trap and level are raised circuit, trap and level are raised the input OUT3 of circuit respectively successively by two series resistance R21, R22 and successively by two series capacitance C22, C23 is connected with the positive input terminal (pin 3) of the 7th operational amplifier U8, the negative input end of the 7th operational amplifier U8 (pin 2) is connected with the outfan (pin 6) of the 7th operational amplifier U8, the output of the 7th operational amplifier U8 (pin 6) is also by resistance R 32 negative input end (pin 2) connection mutually with the 8th operational amplifier U9, the positive input terminal of the 8th operational amplifier U9 (pin 3) connects the output of potentiometer R37, two inputs of potentiometer R37 connect power supply VCC respectively, ground GND, the output ECG_out(pin 6 of the 8th operational amplifier) raises the output ECG_out of circuit as trap and level;
The output of the 7th operational amplifier U8 is also successively by two series resistance R25, R24 ground connection, and these two series resistance R25 are connected with the positive input terminal (pin 3) of the 6th operational amplifier U7 with the end that joins of R24, the negative input end of the 6th operational amplifier U7 (pin 2) is connected with the outfan of the 6th operational amplifier U7, two series resistance R21 that the outfan of the 6th operational amplifier U7 (pin 6) also is connected to that the positive input terminal (pin 3) of the 7th operational amplifier U8 connects by capacitor C 24 respectively and the end that joins of R22, two series capacitance C22 that are connected to that the positive input terminal (pin 3) of the 7th operational amplifier U8 connects by resistance R 23 and the end that links to each other of C23.
As shown in Figure 8, two sensitivity control ports of described acceleration transducer MMA7260 (pin 1, pin 2) are connected to that central authorities handle and two output Gs1(P1_7 of transceiver module CC2430 by resistance R 26, R27 respectively), Gs2(P1_6), the axial output of the X of acceleration transducer MMA7260, Y, Z is respectively by resistance R 29, R30, R31 three analog input Xout_p00(P0_0 with central processing and transceiver module CC2430), Yout_p05(P0_5), Zout_p07(P0_7) be connected.
Wireless receiving and the transmit port TXRX(pin 33 of central authorities' processing and transceiver module CC2430) be connected with the carrier wave end of T type microstrip antenna, central authorities handle and forward radiofrequency signal port RF_P (pin 32) and the negative sense radiofrequency signal port RF_N (pin 34) of transceiver module CC2430 are connected with two vibration ends of T type microstrip antenna respectively.
Central authorities handle and two outfan LED1(P1_0 of transceiver module CC2430), LED2(P1_1) also connect respectively and set up network successful connection display lamp LED1, bind request success display lamp LED2.
As shown in Figure 1, whole fall detection system comprises: the single arm type electrocardio is assisted fall detection instrument 101, System Control Center 102, note cat (GSM modem) alarm 103.
The operation principle of the auxiliary fall detection instrument of single arm type electrocardio of the present invention:
Two sampling electrocardioelectrode pasters that are attached on the human body send human ecg signal to electrocardio modulate circuit 203 by 2 road cardiac diagnosis leads 202, and the human body single arm type electrocardiosignal that obtains at last as shown in figure 10.Because two electrocardio sampling electrode distances are very near, therefore the original electrocardiographicdigital signal is extremely faint, must obtain the original electrocardiographicdigital signal by the preamplifier U1 that has high input impedance among Fig. 3, preamplifier U1 is input to the signal OUT1 of original electrocardiographicdigital signal behind preliminary the amplification that cut-off frequency is 10 among Fig. 5
Hz4 rank low pass filters 501, the myoelectricity noise and 50 that comprises in the filtering electrocardiosignal
HzPower frequency is disturbed, and is 0.2 through a cut-off frequency again
HzHigh pass filter 502, the low frequency noise that has human body respiration to cause in the filtered signal obtains signal OUT2, OUT2 is through 101 zero one times of 601 pairs of signals of main amplifying circuit disposable amplifications, owing to 101 times of disposable amplifications, those are minimum by 500 before
HzAbove high frequency noise is also amplified simultaneously, and signal has been produced serious disturbance, and therefore signal being input to a cut-off frequency is 500 again
HzLow pass filter 602 obtain signal OUT3.Through the amplification of front end, introduced 50 again among the signal OUT3
HzPower frequency is disturbed, and signal OUT3 is input to one-level double-T shaped 50
HzTrap circuit 701.AD conversion for convenience, at last signal is introduced level and raised circuit 702, bipolar signal is transformed into unipolar positive voltage signal ECG_out, at last the ECG_out signal is input to central authorities and handles and radio receiving transmitting module 205(CC2430) input P0_1.
Preamplifier AD620 pin of chip 1 among Fig. 4 is controlled resistance R 1=6.8 with the gain of pin 8
KThe preposition amplification of decision-making circuit is 8.26;
Fig. 5 is that a cut-off frequency is 10
HzChebyshev's 4 rank low pass filters 501 and a cut-off frequency be 0.2
Hz2 rank high pass filters 502;
Wherein 4 rank low pass filters are to be formed by two 2 rank low pass filter cascades, resistance R 2, R3, R6, R7 (R2=R3=R6=R7=15
k) and capacitor C 5, C6, C7, C8 (C5=C6=C7=C8=1
Uf) determine that the filtering cut-off frequency is 10
Hz, each level is passed through resistance R 4 simultaneously, R12 (R4=R12=10k), and R5, R12 (R5=R12=15k) amplifies 2.5 times to signal, amplifies 6.25 times jointly behind the two-stage cascade.
Wherein the cut-off frequency of 2 rank high pass filters 502 is by resistance R 2, R3 (R2=R3=39
k) and capacitor C 11, C12 (C11=C12=22
Uf) decision, simultaneously by resistance R 12, R13 (R12=R13=10
k) signal is amplified 2 times.
Main amplification and filter circuit are by main amplifying circuit 601 and filter circuit 602(low pass among Fig. 6) form;
Wherein main amplifying circuit 601 is by resistance R 16 (R16=10
k), R17 (R17=1
M) signal is amplified 101 times;
Wherein the cut-off frequency of filter circuit 602 is 500
Hz,By resistance R 18 (R18=), C21 (C21=3.3
Uf) decision, simultaneously by resistance R 19 (R19=34
k), R20 (R20=100
k) signal is amplified 4 times.
Be one double-T shaped 50 among Fig. 7
Hz Trap circuit 701 and level are raised circuit 702.
Wherein trap circuit 701 trap frequencies are 50
Hz,By resistance R 21, R22, R23 (R21=R22=2R23=6.8
k) and capacitor C 22, C23, C24 (C24=2C22=2C23=0.94
Uf) decision;
Wherein level is raised the output of positive input terminal (pin 3) the connection potentiometer R37 of the 6th operational amplifier U7 in the circuit 602, the two ends of potentiometer R37 connect power supply VCC and ground GND respectively, the whole malleation of raising input signal by the output voltage of potentiometer R37 makes in its scope that all is in positive voltage, simultaneously by resistance R 33 (R33=10K) and R33 (R33=3.3k), to 3 times of input signal amplitude attenuations.Behind the multiple-stage filtering amplifying circuit, total gain is 82.9 to the original electrocardiographicdigital signal
DB
Acceleration transducer MA7260 among Fig. 8 has two sensitivity control ports (pin 1, pin 2) respectively by resistance R 26, R27 (R26=R27=0.561
k) be connected to that central authorities handle and two output Gs1(P1_7 of transceiver module CC2430), Gs2(P1_6); In control, central authorities handle and P1_7 and these two pins of P1_6 of transceiver module CC2430 export 1 simultaneously, select the minimum sensitivity gear 200mv/g of acceleration transducer MA7260, acceleration transducer MMA7260 is at X, acceleration signal Xout, the Yout that Y, Z axially upward export, Zout are respectively through a RC (R=1
k, C=0.1
Uf) low pass filter removes the high frequency noise that is caused by the sensor internal clock, acceleration signal Xout_p00, Yout_p05, the Zout_p07 that obtains at last delivers to that central authorities handle and three analog input Xout_p00(P0_0 of transceiver module CC2430), Yout_p05(P0_5), Zout_p07(P0_7) end.
Figure 21 is the firmware program flow chart of detector of the present invention.
Detector of the present invention detects X by the 3D acceleration transducer, Y, and the axial acceleration change of Z is tentatively judged the position situation that human body is real-time, and adopts multistage amplifier circuit and multilevel simulation filter circuit that original single armed electrocardiosignal is amplified 82.7
DB, the myoelectricity of filtering simultaneously interference and 50
HzPower frequency is disturbed, obtain practical single arm type ecg wave form, and this single arm type ecg wave form sent to System Control Center by wireless telecommunications Zigbee agreement, single arm type electrocardiosignal waveform (Figure 11) when System Control Center lies low by human body is in is analyzed with the single arm type electrocardiosignal waveform (Figure 12) that human body is in when standing, and whether human body is fallen carry out auxiliary judgment.
It is as follows that the form of System Control Center degree of will speed up sensor acquisition data and the human body single arm type electrocardiosignal before and after the incident of falling takes place is analyzed the method that combines:
According to 3D acceleration information and single arm type electrocardiogram (ECG) data that sampling obtains, the fall detection recognizer is divided into two steps:
Step 1: the voltage peak-to-peak value addition that the acceleration change of the X under the different behaviors, Z axle is caused, wherein
The voltage peak-to-peak value that causes for the acceleration change of X-axis,
The voltage peak-to-peak value that causes for the acceleration change of Z axle, shown in Figure 14,16, if＞0.5 can tentatively judge the incident of falling down.If the peak-to-peak value on the Z axle as shown in figure 13, that is, then falls for side greater than X-axis simultaneously.If the little and X-axis of the peak-to-peak value on the Z axle as shown in figure 15, that is, is then fallen down for layback takes place;
Step 2: after incident is fallen down in preliminary judgement, detect the single arm type electrocardiosignal P ripple and the S pitch of waves from Dqs, if Dqs＜100, as shown in figure 11, human body is in the position that lays flat on one's back, and then can determine the incident of falling down; If Dqs＞100, as shown in figure 12, then human body still is in the normal stand state and does not fall.
After judging the incident of falling according to above two steps, System Control Center can send alarming short message to the kith and kin of guardianship by the note cat, so that take the measure of giving treatment to timely.The note cat can be adopted the TC35 GSM Modem of Siemens Company, adopts a USB to change Serial Port Line the note cat is linked to each other with the host computer of System Control Center, and the USB mouth connects the U mouth of computer, and serial ports links to each other with the note cat.Also need a SIM card to make the note cat add the GSM network in use, the kith and kin that could normally send SMS to guardianship.
Auxiliary fall detection instrument using method of single arm type electrocardio of the present invention and work process:
1, the biceps brachii m. of upper arm and elbow joint are slightly chosen a suitable place stickup electrocardioelectrode paster 1 and an electrocardioelectrode paster 2 respectively in top leftward, see Figure 19;
2, fall detection instrument of the present invention is worn on the left hand upper arm of guardianship, 2 road cardiac diagnosis leads are continuous with corresponding electrode patch, see Figure 20;
3, start the fall detection instrument, and set up the ZigBee wireless network with System Control Center and be connected, and set up binding mechanism;
4, the fall detection instrument begins to gather in real time the single arm type electrocardiogram (ECG) data and the acceleration transducer data of human body;
5, the Human Physiology data that previous step collected send to System Control Center by the ZigBee wireless network;
6, the data of receiving are stored and analyzed to System Control Center, if determine that human body is in normal condition, then continues monitoring; If determine the human body incident of falling, then drive note cat (GSM modem) alarm transmission alarming short message and cease kith and kin to guardianship.
Claims (3)
1. the auxiliary fall detection instrument of a single arm type electrocardio is characterized in that: comprise power module, 2 road cardiac diagnosis leads, electrocardiosignal conditioning module, acceleration transducer, central processing and transceiver module, two electrode patchs, t-antenna;
Described electrocardiosignal conditioning module comprises that preamplifier, bandwidth-limited circuit, main amplification and filter circuit, trap and level raise circuit;
Described bandwidth-limited circuit comprises low-pass filter circuit, high-pass filtering circuit;
Described low-pass filter circuit comprises first operational amplifier, second operational amplifier;
Described high-pass filtering circuit comprises the 3rd operational amplifier;
Described main amplification and filter circuit comprise main amplifying circuit, filter circuit;
Described main amplifying circuit comprises four-operational amplifier;
Described filter circuit comprises the 5th operational amplifier;
Described trap and level are raised circuit and are comprised that trap circuit, level raise circuit;
Described trap circuit comprises the 6th operational amplifier, the 7th operational amplifier;
Described level is raised circuit and is comprised the 8th operational amplifier;
Described two electrode patchs connect the two-way input of 2 road cardiac diagnosis leads respectively, and the two-way output of 2 road cardiac diagnosis leads connects positive input terminal, the negative input end of described preamplifier respectively;
The output of described preamplifier is connected with the input of bandwidth-limited circuit;
The output of described bandwidth-limited circuit is connected with the input of main amplification and filter circuit;
The output of described main amplification and filter circuit is connected with the input that trap and level are raised circuit;
The output that described trap and level are raised circuit is connected to that central authorities handle and an input of transceiver module;
Two sensitivity control ports of described acceleration transducer are connected in two outputs of central authorities' processing and transceiver module by resistance respectively, and acceleration transducer X, Y, the axial output of Z are connected with central authorities' processing and three analog inputs of transceiver module by resistance respectively;
Central authorities handle and the wireless receiving and the transmit port of transceiver module are connected with the carrier wave end of t-antenna, and central authorities handle and the forward radiofrequency signal port and the negative sense radiofrequency signal port of transceiver module are connected with two vibration ends of t-antenna respectively;
Two outfans of processing of described central authorities and transceiver module also connect respectively sets up network successful connection display lamp, bind request success display lamp.
2. single arm type electrocardio as claimed in claim 1 is assisted the fall detection instrument, and it is characterized in that: described power module comprises voltage inverter and power regulator.
3. single arm type electrocardio as claimed in claim 1 is assisted the fall detection instrument, it is characterized in that: the input of described bandwidth-limited circuit is connected with the positive input terminal of first operational amplifier by two series resistances successively, the negative input end of first operational amplifier passes through resistance eutral grounding, the output of first operational amplifier is connected with the positive input terminal of second operational amplifier by two series resistances successively, the negative input end of second operational amplifier passes through resistance eutral grounding, the output of second operational amplifier is connected with the positive input terminal of the 3rd operational amplifier by two series capacitances successively, the negative input end of the 3rd operational amplifier is by resistance eutral grounding, and the output of the 3rd operational amplifier is as the output of band filter;
The output of described band filter is connected with the input of main amplification and filter circuit, the input of main amplification and filter circuit is connected with the positive input terminal of four-operational amplifier, the negative input end of four-operational amplifier passes through resistance eutral grounding, the output of four-operational amplifier is connected by the positive input terminal of resistance with the 5th operational amplifier, the negative input end of the 5th operational amplifier is by resistance eutral grounding, and the output of the 5th operational amplifier is as the output of main amplification and filter circuit;
The output of described main amplification and filter circuit is connected with the input that trap and level are raised circuit, trap and level are raised the input of circuit respectively successively by two series resistances, be connected with the positive input terminal of the 7th operational amplifier by two series capacitances successively, the negative input end of the 7th operational amplifier is connected with the outfan of the 7th operational amplifier, the output of the 7th operational amplifier also is connected by the negative input end of resistance with the 8th operational amplifier, the positive input terminal of the 8th operational amplifier connects potentiometric output, potentiometric two inputs connect power supply respectively, ground, the output of circuit is raised in the output of the 8th operational amplifier as wave trap and level; The output of the 7th operational amplifier is also successively by two series resistance ground connection, and the continuous end of these two series resistances is connected with the positive input terminal of the 6th operational amplifier, the negative input end of the 6th operational amplifier is connected with the outfan of the 6th operational amplifier, and the outfan of the 6th operational amplifier also is connected to the continuous end of two series resistances that the positive input terminal of the 7th operational amplifier connects, is connected to the continuous end of two series capacitances that the positive input terminal of the 7th operational amplifier connects by resistance by electric capacity respectively.
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| WO2018129718A1 (en) * | 2017-01-13 | 2018-07-19 | 深圳先进技术研究院 | Device and method for use in detecting electrocardio signals |
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