CN204274468U - Photoelectric blood oxygen detector based on audio port - Google Patents
Photoelectric blood oxygen detector based on audio port Download PDFInfo
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- CN204274468U CN204274468U CN201420746219.1U CN201420746219U CN204274468U CN 204274468 U CN204274468 U CN 204274468U CN 201420746219 U CN201420746219 U CN 201420746219U CN 204274468 U CN204274468 U CN 204274468U
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000008280 blood Substances 0.000 title claims abstract description 18
- 210000004369 blood Anatomy 0.000 title claims abstract description 18
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 18
- 239000001301 oxygen Substances 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 37
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- 239000004065 semiconductor Substances 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
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- 101100509023 Candida albicans (strain SC5314 / ATCC MYA-2876) IRO1 gene Proteins 0.000 description 2
- 101100162020 Mesorhizobium japonicum (strain LMG 29417 / CECT 9101 / MAFF 303099) adc3 gene Proteins 0.000 description 2
- 101100434411 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ADH1 gene Proteins 0.000 description 2
- 101100179982 Xenopus laevis irx1-a gene Proteins 0.000 description 2
- 101100179986 Xenopus tropicalis irx1 gene Proteins 0.000 description 2
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Abstract
The utility model provides a photoelectric blood oxygen detector based on audio port, which comprises an audio port, a power supply resonance circuit, a receiving resonance circuit, a signal receiving circuit, an energy storage circuit, an electronic switch circuit, a singlechip, a voltage regulating circuit, an H bridge circuit, an infrared light emitting diode, a red light emitting diode, a photodiode, an operational amplifier circuit, a filter circuit and a multiplexer; the signal receiving circuit is used for converting the resonance waveform signal output by the receiving resonance circuit into a square wave pulse signal identified by the singlechip; the voltage regulating circuit is used for changing the output voltage value of the controllable voltage output end of the voltage regulating circuit according to the control signal sent by the H-bridge power supply control signal output end of the singlechip; the operational amplifier circuit is used for amplifying the collected signals sent by the signal output end of the photodiode. The detector has the advantages of low error rate, high universality, no need of self power supply and high market application prospect.
Description
Technical field
This utility model relates to a kind of photo-electric blood oxygen detection, especially a kind of photo-electric blood oxygen detection based on audio port.
Background technology
Along with progress that is economic and science and technology, the life of intelligent mobile terminal equipment as mobile phone, PDA equipment, panel computer and people is more and more closely bound up.Meanwhile, its performance and function are also from strength to strength.Associated various ancillary equipment and application also get more and more.These ancillary equipment need to communicate with intelligent mobile terminal on the one hand, on the other hand for some low power consuming devices, also wish power supply supply to be taken into account, the loss avoiding needing external connection battery to bring and cost increase.Current ancillary equipment and the communication mode of mobile terminal mainly contain with under type: 1) radio communication, mainly use Bluetooth technology, WiFi, secondary and three generations's communication technology, advantage is that communication technology is ripe, applied widely, shortcoming is that to be ravesdropping the probability of divulging a secret large, may increase cost simultaneously; 2) use the USB port communication of mobile phone, but current most of mobile phone does not still support OTG agreement, cannot be carried out the control of ancillary equipment by mobile phone USB interface; 3) use audio port communication, most popular is La Kala equipment, and its mode adopted is analogue signal, and communication bit error rates is higher, and does not support all mobile phones.Communication can not provide terminal electric energy, and USB is different because of the interface shape of different mobile phone, makes the adaptive all intelligent mobile terminals of ancillary equipment bring difficulty, unique feasible be use audio port to carry out communicating and powering.But have not yet to see complete use audio port communication and the total solution of power supply.
Summary of the invention
The technical problems to be solved in the utility model is that the bit error rate adopting audio port to communicate in prior art is higher, universality is low, and can not power for ancillary equipment.
In order to solve the problems of the technologies described above, this utility model provides a kind of photo-electric blood oxygen detection based on audio port, comprises audio interface, for electric resonant circuit, receives resonance circuit, signal receiving circuit, accumulator, electronic switching circuit, single-chip microcomputer, voltage regulator circuit, H-bridge circuit, infrared light emitting diodes, red light-emitting diode, photodiode, discharge circuit, filter circuit and MUX; Audio interface is made up of L channel circuit, R channel circuit and mike circuit, L channel circuit is connected with the resonance signal input for electric resonant circuit, R channel circuit is connected with the resonance signal input receiving resonance circuit, and mike circuit is connected with the data sending terminal mouth of single-chip microcomputer; Resonance signal outfan for electric resonant circuit is connected with the electrical energy inputs of accumulator, and the resonance signal outfan receiving resonance circuit is connected with the electrical energy inputs of accumulator and the signal input part of signal receiving circuit respectively; The signal output part of signal receiving circuit is connected with the signal input port of single-chip microcomputer; The power end of the electric energy output end of accumulator and the input of electronic switching circuit and single-chip microcomputer be connected, the control end of electronic switching circuit is connected with the switch controlling signal output port of single-chip microcomputer, and the outfan of electronic switching circuit is connected with the feeder ear of the feeder ear of voltage regulator circuit, the high-pressure side of H-bridge circuit, the feeder ear of discharge circuit and filter circuit respectively; The control signal end of voltage regulator circuit is connected with the H bridge power control signal outfan of single-chip microcomputer, and the controllable voltage outfan of voltage regulator circuit is connected with the low-pressure end of H-bridge circuit; Infrared light emitting diodes and red light-emitting diode are connected on the intermediate transverse girder of H-bridge circuit, and the bias polarity of infrared light emitting diodes and red light-emitting diode is contrary; The bridge road Continuity signal input of H-bridge circuit is connected with the bridge road Continuity signal output port of single-chip microcomputer; The signal output part of photodiode is connected with the signal input part of discharge circuit, and the signal output part of discharge circuit is connected with the signal input part of MUX; The control end of MUX is connected with the selection control port of single-chip microcomputer, and the input that the two paths of signals outfan of MUX gathers port and filter circuit with the primary signal of single-chip microcomputer is respectively connected; The AC compounent outfan of filter circuit gathers port with the ac signal acquisition port of single-chip microcomputer with direct current signal respectively with DC component outfan and is connected;
Signal receiving circuit is used for the square-wave pulse signal harmonic wave signal receiving resonance circuit output being converted to single-chip microcomputer identification; H-bridge circuit only has the Liang Geqiao road conducting at one group of diagonal angle at synchronization; The control signal that voltage regulator circuit is used for sending according to the H bridge power control signal outfan of single-chip microcomputer changes the output voltage values of the controllable voltage outfan of voltage regulator circuit; Photodiode just to infrared light emitting diodes and red light-emitting diode, for gathering the optical signal that infrared light emitting diodes and red light-emitting diode send; Discharge circuit is used for carrying out processing and amplifying to the acquired signal that the signal output part of photodiode sends.
Adopt the frequency signal receiving L channel transmission for electric resonant circuit, electric energy can be provided to store for accumulator, thus further for other circuit of detector provide enough electrical energy demands, and detector itself does not possess power supply, effectively reduces volume and the use cost of detector; Adopt and receive the frequency signal that resonance circuit receives R channel transmission, electric energy can also be provided to store for accumulator when not carrying out Signal reception, further increase the charge efficiency of accumulator, the acquisition time that the charging interval extends oximetry data is shortened within limited detection time, enhance the data acquisition success rate of detector, shorten sense cycle; Adopt the break-make of Single-chip Controlling electronic switching circuit, after data acquisition, the power supply of main power consuming circuit can be cut off in time, thus make detector enter resting state, effectively save the loss of electric energy, improve the single charge utilization rate of accumulator; Adopt signal receiving circuit the harmonic wave signal receiving resonance circuit output can be converted to the discernible square-wave pulse signal of single-chip microcomputer, thus make R channel not only possess charge function but also possess signal transfer functions, improve the utilization rate of audio port hardware; Adopt and infrared light emitting diodes and red light-emitting diode bias polarity are connected on the intermediate transverse girder of H-bridge circuit on the contrary, can guarantee that synchronization can only have the designing requirement of a lumination of light emitting diode, also two light emitting diodes can be avoided simultaneously bright from hardware designs simultaneously; Adopt discharge circuit can carry out processing and amplifying to the signal of photodiode collection, the A/D of single-chip microcomputer is held can effectively be gathered; Adopt filter circuit the AC compounent that discharge circuit exports can be separated with DC component, single-chip microcomputer is gathered two paths of signals respectively, alleviates the pressure of later stage signal processing; Adopt MUX can control in real time the need of unlatching filter circuit according to energy consumption, thus effectively extend the detection duration of detector single charge.
As further improvement of the utility model scheme, also comprise voltage-dividing detection circuit, the high-pressure side of voltage-dividing detection circuit is connected with the electric energy output end of accumulator, and a point pressure side for voltage-dividing detection circuit is connected with the voltage sample port of single-chip microcomputer.Adopt voltage-dividing detection circuit can detect the magnitude of voltage of accumulator in real time, thus the external mobile device transmission frequency of being docked by microphone lines road direction audio port by single-chip microcomputer regulates request, sent the audio signal of corresponding frequencies according to frequency adjustment request by mobile device, make to obtain best resonance effect for electric resonant circuit, thus make accumulator obtain the electric energy of enough voltage further.
As further improvement of the utility model scheme, also comprise an alarm, alarm is connected with the alarm signal output ends of single-chip microcomputer.Due to external mobile device audio port dock in testing process with detector occupied, usually do not possess sound alarm function, especially as the mobile device of mobile phone one class, external loudspeaker will automatically be set when audio port is occupied quiet, so it is particularly important to arrange alarm on detector.
As further restriction scheme of the present utility model, oscillating capacitance C2, oscillating capacitance C4 and vibration inductance L 1 is comprised for electric resonant circuit, be in parallel with vibration inductance L 1 after oscillating capacitance C2 and oscillating capacitance C4 connects, the resonance signal input for electric resonant circuit is positioned at oscillating capacitance C2 and oscillating capacitance C4 junction; One end ground connection of vibration inductance L 1, the other end is the resonance signal outfan for electric resonant circuit.Adopt this confession electric resonant circuit effectively can improve the resonance effect of the frequency signal that L channel receives, thus successfully for accumulator charges.
As further improvement of the utility model scheme, supply to be provided with stabilivolt D1 between the resonance signal outfan of electric resonant circuit and the electrical energy inputs of accumulator, the positive pole of stabilivolt D1 is connected with the resonance signal outfan for electric resonant circuit, and the negative pole of stabilivolt D1 is connected with the electrical energy inputs of accumulator.The resonance signal adopting stabilivolt D1 the resonance signal outfan for electric resonant circuit can be exported carries out calm disposing, further increases the charging effect of accumulator.
As further restriction scheme of the present utility model, receive resonance circuit and comprise oscillating capacitance C5, oscillating capacitance C6 and vibration inductance L 2, be in parallel with vibration inductance L 2 after oscillating capacitance C5 and oscillating capacitance C6 connects, the resonance signal input receiving resonance circuit is positioned at oscillating capacitance C5 and oscillating capacitance C6 junction; One end ground connection of vibration inductance L 2, the other end is the resonance signal outfan receiving resonance circuit.Adopt this reception resonance circuit effectively can improve the resonance effect of the frequency signal that R channel receives, thus successfully for accumulator charges.
As further improvement of the utility model scheme, receive between the resonance signal input of resonance circuit and the electrical energy inputs of accumulator and be provided with stabilivolt D2, the positive pole of stabilivolt D2 is connected with the resonance signal outfan receiving resonance circuit, and the negative pole of stabilivolt D2 is connected with the electrical energy inputs of accumulator.Adopt stabilivolt D2 the resonance signal that the resonance signal outfan receiving resonance circuit exports can be carried out calm disposing, further increase the charging effect of accumulator.
As further restriction scheme of the present utility model, signal receiving circuit comprises detector diode D3, electric capacity C7 and resistance R8, the positive pole of detector diode D3 is connected with the resonance signal outfan receiving resonance circuit, and the negative pole of detector diode D3 is connected with the signal input port of single-chip microcomputer; One end of electric capacity C7 is connected with the negative pole of detector diode D3, other end ground connection; One end of resistance R8 is connected with the negative pole of detector diode D3, other end ground connection.Adopt detector diode D3 to carry out detection, the calm disposing of the resonance signal of the resonance signal outfan output of receiving resonance circuit that achieves a butt joint, and then carried out the filtering of HFS by the RC circuit that electric capacity C7 and resistance R8 is formed.
As further restriction scheme of the present utility model, be also provided with voltage adaptation circuit between the data sending terminal mouth of mike circuit and single-chip microcomputer, voltage adaptation circuit comprises pull down resistor R7, adapts to resistance R5 and adapt to resistance R6; The resistance adapting to resistance R5 is greater than the resistance adapting to resistance R6; Adapt to be connected with mike circuit again after resistance R5 is connected with the one end adapting to resistance R6, adapt to resistance R5 and be connected to the different data sending terminal mouth of single-chip microcomputer respectively with the other end adapting to resistance R6; One end of pull down resistor R7 is connected to the junction adapting to resistance R5 and adapt to resistance R6, other end ground connection.Arrange between mike circuit and the data sending terminal mouth of single-chip microcomputer and adapt to resistance R5 or adapt to resistance R6, single-chip microcomputer can be made to select suitable transmit port to carry out signal transmission according to the external mobile device level demand of docking, improve the adaptive capacity of detector.
As further restriction scheme of the present utility model, voltage regulator circuit comprises resistance R16, resistance R19, resistance R20, audion Q6 and audion Q7; The colelctor electrode of audion Q6 is connected with the low-pressure end of H-bridge circuit, and the emitter stage of audion Q6 is connected with one end of resistance R19, and the base stage of audion Q6 is connected with the colelctor electrode of audion Q7; The colelctor electrode of audion Q7 is also connected with one end of resistance R16, the grounded emitter of audion Q7, and the base stage of audion Q7 is connected with the H bridge power control signal outfan of single-chip microcomputer; The other end of resistance R16 is connected with the outfan of electronic switching circuit; The other end ground connection of resistance R19; One end of resistance R20 is connected with the base stage of audion Q7, the other end ground connection of resistance R20; Audion Q6 is NPN type triode, and audion Q7 is PNP type triode.The square-wave signal adopting single-chip microcomputer to send different frequency controls the break-make of audion Q7, the controllable voltage outfan of voltage regulator circuit is made to export controlled magnitude of voltage, thus make between the high-pressure side of H-bridge circuit and low-pressure end, to present controlled pressure drop, the magnitude of voltage be carried on infrared light emitting diodes and red light-emitting diode is realized controlled, thus tackle different user, improve the universality of detector.
The beneficial effects of the utility model are: (1) adopts the frequency signal receiving L channel transmission for electric resonant circuit, electric energy can be provided to store for accumulator, thus further for other circuit of detector provide enough electrical energy demands, and detector itself does not possess power supply, effectively reduce volume and the use cost of detector; (2) frequency signal receiving resonance circuit reception R channel and transmit is adopted, electric energy can also be provided to store for accumulator when not carrying out Signal reception, further increase the charge efficiency of accumulator, the acquisition time that the charging interval extends oximetry data is shortened within limited detection time, enhance the data acquisition success rate of detector, shorten sense cycle; (3) break-make of Single-chip Controlling electronic switching circuit is adopted, the power supply of main power consuming circuit can be cut off in time after data acquisition, thus make detector enter resting state, effectively save the loss of electric energy, improve the single charge utilization rate of accumulator; (4) signal receiving circuit is adopted the harmonic wave signal receiving resonance circuit output can be converted to the discernible square-wave pulse signal of single-chip microcomputer, thus make R channel not only possess charge function but also possess signal transfer functions, improve the utilization rate of audio port hardware; (5) infrared light emitting diodes and red light-emitting diode bias polarity are connected on the intermediate transverse girder of H-bridge circuit by employing on the contrary, can guarantee that synchronization can only have the designing requirement of a lumination of light emitting diode, also two light emitting diodes can be avoided simultaneously bright from hardware designs simultaneously; (6) adopt discharge circuit can carry out processing and amplifying to the signal of photodiode collection, the A/D of single-chip microcomputer is held can effectively be gathered; (7) adopt filter circuit the AC compounent that discharge circuit exports can be separated with DC component, single-chip microcomputer is gathered two paths of signals respectively, alleviates the pressure of later stage signal processing; (8) adopt MUX can control in real time the need of unlatching filter circuit according to energy consumption, thus effectively extend the detection duration of detector single charge.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is audio port circuit connection structure schematic diagram of the present utility model;
Fig. 3 is H-bridge circuit of the present utility model and voltage regulator circuit structural representation;
Fig. 4 is discharge circuit structural representation of the present utility model;
Fig. 5 is one-chip machine port schematic diagram of the present utility model;
Fig. 6 is voltage-dividing detection circuit structural representation of the present utility model;
Fig. 7 is the resonance signal that reception resonance circuit of the present utility model exports;
Fig. 8 is the square-wave pulse signal obtained after signal receiving circuit process of the present utility model.
Detailed description of the invention
As shown in Figure 1, this utility model provides a kind of photo-electric blood oxygen detection based on audio port, comprises audio interface, for electric resonant circuit 1, receives resonance circuit 3, signal receiving circuit 5, accumulator 2, electronic switching circuit 6, single-chip microcomputer 10, voltage regulator circuit 8, H-bridge circuit 7, infrared light emitting diodes, red light-emitting diode, photodiode, discharge circuit 9, filter circuit and MUX; Audio interface is made up of L channel circuit, R channel circuit and mike circuit, L channel circuit is connected with the resonance signal input for electric resonant circuit 1, R channel circuit is connected with the resonance signal input receiving resonance circuit 3, and mike circuit is connected with the data sending terminal mouth of single-chip microcomputer 10; Resonance signal outfan for electric resonant circuit 1 is connected with the electrical energy inputs of accumulator 2, and the resonance signal outfan receiving resonance circuit 3 is connected with the electrical energy inputs of accumulator 2 and the signal input part of signal receiving circuit 5 respectively; The signal output part of signal receiving circuit 5 is connected with the signal input port of single-chip microcomputer 10; The power end of the electric energy output end of accumulator 2 and the input of electronic switching circuit 6 and single-chip microcomputer 10 be connected, the control end of electronic switching circuit 6 is connected with the switch controlling signal output port of single-chip microcomputer 10, and the outfan of electronic switching circuit 6 is connected with the high-pressure side of the feeder ear of voltage regulator circuit 8, H-bridge circuit 7, the feeder ear of discharge circuit 9 and the feeder ear of filter circuit respectively; The control signal end of voltage regulator circuit 8 is connected with the H bridge power control signal outfan of single-chip microcomputer 10, and the controllable voltage outfan of voltage regulator circuit 8 is connected with the low-pressure end of H-bridge circuit 7; Infrared light emitting diodes and red light-emitting diode are connected on the intermediate transverse girder of H-bridge circuit 7, and the bias polarity of infrared light emitting diodes and red light-emitting diode is contrary; The bridge road Continuity signal input of H-bridge circuit 7 is connected with the bridge road Continuity signal output port of single-chip microcomputer 10; The signal output part of photodiode is connected with the signal input part of discharge circuit 9, and the signal output part of discharge circuit 9 is connected with the signal input part of MUX; The control end of MUX is connected with the selection control port of single-chip microcomputer 10, and the input that the two paths of signals outfan of MUX gathers port and filter circuit with the primary signal of single-chip microcomputer 10 is respectively connected; The AC compounent outfan of filter circuit gathers port with the ac signal acquisition port of single-chip microcomputer 10 with direct current signal respectively with DC component outfan and is connected;
Signal receiving circuit 5 is for being converted to receiving the harmonic wave signal that exports of resonance circuit 3 square-wave pulse signal that single-chip microcomputer 10 identifies; H-bridge circuit 7 only has the Liang Geqiao road conducting at one group of diagonal angle at synchronization; Voltage regulator circuit 8 changes the output voltage values of the controllable voltage outfan of voltage regulator circuit 8 for the control signal sent according to the H bridge power control signal outfan of single-chip microcomputer 10; Photodiode just to infrared light emitting diodes and red light-emitting diode, for gathering the optical signal that infrared light emitting diodes and red light-emitting diode send; Discharge circuit 9 carries out processing and amplifying for the acquired signal sent the signal output part of photodiode.
In order to detect according to reality the voltage that voltage regulates accumulator 2 in real time, the voltage of accumulator 2 is enable to meet the electric energy of the energy consuming circuitry of detector, this utility model also comprises voltage-dividing detection circuit 11, the high-pressure side of voltage-dividing detection circuit 11 is connected with the electric energy output end of accumulator 2, and a point pressure side for voltage-dividing detection circuit 11 is connected with the voltage sample port of single-chip microcomputer 10.Adopt voltage-dividing detection circuit 11 can detect the magnitude of voltage of accumulator 2 in real time, thus the external mobile device transmission frequency of being docked by microphone lines road direction audio port by single-chip microcomputer 10 regulates request, sent the audio signal of corresponding frequencies according to frequency adjustment request by mobile device, make to obtain best resonance effect for electric resonant circuit 1, thus make accumulator 2 obtain the electric energy of enough voltage further.
In order to detector can be made to possess independently warning function, this utility model also comprises an alarm, and alarm is connected with the alarm signal output ends of single-chip microcomputer 10.Due to external mobile device audio port dock in testing process with detector occupied, usually do not possess sound alarm function, especially as the mobile device of mobile phone one class, external loudspeaker will automatically be set when audio port is occupied quiet, so it is particularly important to arrange alarm on detector.
Electronic switching circuit 6 of the present utility model comprises resistance R1, resistance R3 and metal-oxide-semiconductor Q1, one end of resistance R1 is connected with the grid of metal-oxide-semiconductor Q1, the other end of resistance R1 is connected with the switch controlling signal output port IRC0 of single-chip microcomputer 10, between the grid that resistance R3 is connected to metal-oxide-semiconductor Q1 and source electrode, the drain electrode of metal-oxide-semiconductor Q1 exports the voltage source for VAA.
As shown in Figure 2, the electric resonant circuit 1 that supplies of the present utility model comprises oscillating capacitance C2, oscillating capacitance C4 and vibration inductance L 1, be in parallel with vibration inductance L 1 after oscillating capacitance C2 and oscillating capacitance C4 connects, the resonance signal input for electric resonant circuit is positioned at oscillating capacitance C2 and oscillating capacitance C4 junction; One end ground connection of vibration inductance L 1, the other end is the resonance signal outfan for electric resonant circuit, and the multiple amplifying the frequency signal amplitude that L channel receives for electric resonant circuit 1 is 50 ~ 200.Adopt this confession electric resonant circuit 1 effectively can improve the resonance effect of the frequency signal that L channel receives, thus successfully for accumulator charges.
In order to improve the charging effect of accumulator 2 further, stabilivolt D1 is provided with between resonance signal outfan for electric resonant circuit 1 of the present utility model and the electrical energy inputs of accumulator, the positive pole of stabilivolt D1 is connected with the resonance signal outfan for electric resonant circuit, and the negative pole of stabilivolt D1 is connected with the electrical energy inputs of accumulator.The resonance signal adopting stabilivolt D1 the resonance signal outfan for electric resonant circuit 1 can be exported carries out calm disposing, further increases the charging effect of accumulator 2.
Reception resonance circuit 3 of the present utility model comprises oscillating capacitance C5, oscillating capacitance C6 and vibration inductance L 2, be in parallel with vibration inductance L 2 after oscillating capacitance C5 and oscillating capacitance C6 connects, the resonance signal input receiving resonance circuit is positioned at oscillating capacitance C5 and oscillating capacitance C6 junction; One end ground connection of vibration inductance L 2, the other end is the resonance signal outfan receiving resonance circuit, and the multiple that reception resonance circuit 3 amplifies the frequency signal amplitude that R channel receives is 50 ~ 200.Adopt this reception resonance circuit 3 effectively can improve the resonance effect of the frequency signal that R channel receives, thus successfully charge for accumulator 2.
In order to improve the charging effect of accumulator 2 further, stabilivolt D2 is provided with between the resonance signal input of reception resonance circuit of the present utility model and the electrical energy inputs of accumulator, the positive pole of stabilivolt D2 is connected with the resonance signal outfan receiving resonance circuit, and the negative pole of stabilivolt D2 is connected with the electrical energy inputs of accumulator.Adopt stabilivolt D2 the resonance signal that the resonance signal outfan receiving resonance circuit 3 exports can be carried out calm disposing, further increase the charging effect of accumulator 2.
As shown in Fig. 1,7 and 8, signal receiving circuit 5 of the present utility model comprises detector diode D3, electric capacity C7 and resistance R8, the positive pole of detector diode D3 is connected with the resonance signal outfan receiving resonance circuit, and the negative pole end of detector diode D3 is connected with the signal input port RXD of single-chip microcomputer; One end of electric capacity C7 is connected with the negative pole of detector diode D3, other end ground connection; One end of resistance R8 is connected with the negative pole of detector diode D3, other end ground connection.Detector diode D3 is adopted to carry out detection to resonance signal as shown in Figure 6, the calm disposing of the resonance signal of the resonance signal outfan output of the receipts that achieve a butt joint resonance circuit 5, and then the filtering of HFS is carried out by the RC circuit that electric capacity C7 and resistance R8 is formed, final acquisition square-wave pulse signal as shown in Figure 8, if the time constant of RC circuit is τ, the audio frequency after resonance is f
1, the frequency of single-chip microcomputer 10 Received signal strength is f
2, then timeconstantτ is needed to meet: f
1<1/ τ <<f
2, the timeconstantτ of RC circuit is set within the scope of this and can effectively prevents bust this or transmission error code.
In order to improve the universality of detector further, this utility model is also provided with voltage adaptation circuit 4 between mike circuit and the data sending terminal mouth of single-chip microcomputer 10, and voltage adaptation circuit 4 comprises pull down resistor R7, adapts to resistance R5 and adapt to resistance R6; The resistance adapting to resistance R5 is greater than the resistance adapting to resistance R6; Adapt to be connected with mike circuit again after resistance R5 is connected with the one end adapting to resistance R6, adapt to resistance R5 and be connected to different data sending terminal mouth P0.1 and P0.2 of single-chip microcomputer respectively with the other end P0.1 with P0.2 adapting to resistance R6; One end of pull down resistor R7 is connected to the junction adapting to resistance R5 and adapt to resistance R6, other end ground connection.Arrange between mike circuit and the data sending terminal mouth of single-chip microcomputer and adapt to resistance R5 or adapt to resistance R6, single-chip microcomputer can be made to select suitable transmit port to carry out signal transmission according to the external mobile device level demand of docking, improve the adaptive capacity of detector.
As shown in Figure 3, H-bridge circuit of the present utility model is conventional H-bridge circuit, comprise altogether symmetrical four Ge Qiao roads, the high-pressure side of H-bridge circuit is connected with the outfan VAA of electronic switching circuit 6, low-pressure end is connected with the other end of resistance R16, the intermediate transverse girder of H-bridge circuit connects the positive pole LED+ of infrared light emitting diodes and the positive pole IR+ of red light-emitting diode, the bridge road Continuity signal input on Liang Geqiao road in left side is connected with the bridge road Continuity signal output port IRO0 of single-chip microcomputer 10, the bridge road Continuity signal input on Liang Geqiao road on right side is connected with the bridge road Continuity signal output port IRO1 of single-chip microcomputer 10.
Voltage regulator circuit 8 of the present utility model comprises resistance R16, resistance R19, resistance R20, audion Q6 and audion Q7; The colelctor electrode of audion Q6 is connected with the low-pressure end of H-bridge circuit, and the emitter stage of audion Q6 is connected with one end of resistance R19, and the base stage of audion Q6 is connected with the colelctor electrode of audion Q7; The colelctor electrode of audion Q7 is also connected with one end of resistance R16, the grounded emitter of audion Q7, and the base stage of audion Q7 is connected with the H bridge power control signal outfan IDA of single-chip microcomputer; The other end of resistance R16 is connected with the outfan VAA of electronic switching circuit; The other end ground connection of resistance R19; One end of resistance R20 is connected with the base stage of audion Q7, the other end ground connection of resistance R20; Audion Q6 is NPN type triode, and audion Q7 is PNP type triode.Single-chip microcomputer 10 is adopted to send the square-wave signal of different frequency to control the break-make of audion Q7, the controllable voltage outfan of voltage regulator circuit 8 is made to export controlled magnitude of voltage, thus make to present controlled pressure drop between the high-pressure side of H-bridge circuit 7 and low-pressure end, the magnitude of voltage be carried on infrared light emitting diodes and red light-emitting diode is realized controlled, thus tackle different user, improve the universality of detector.
As shown in Figure 4, discharge circuit 9 of the present utility model and filter circuit are common discharge circuit and filter circuit, the acquired signal of photodiode can be amplified 8 ~ 10 times by discharge circuit 9, wherein, PHO+ with PHO-is connected with the both positive and negative polarity of photodiode respectively, the signal output part of discharge circuit 9 is connected with the signal input part of MUX, the control end of MUX is connected with the selection control port CL1 of single-chip microcomputer 10, the input that the two paths of signals outfan of MUX gathers port ADC3 and filter circuit with the primary signal of single-chip microcomputer is respectively connected, the feeder ear of MUX is directly connected with the electric energy output end of accumulator 2, the AC compounent outfan of filter circuit gathers port ADC2 with the ac signal acquisition port ADC1 of single-chip microcomputer with direct current signal respectively with DC component outfan and is connected, VAA voltage is provided by the outfan of electronic switching circuit 6, vdd voltage is connected with the DVV port of single-chip microcomputer 10, and the multiple that this discharge circuit 9 amplifies photodiode acquired signal is 50 ~ 150.
As shown in Figure 5, single-chip microcomputer 10 of the present utility model, for having the microprocessor of A/D sampling functions, single-chip microcomputer 10 is provided with switch controlling signal output port IRC0, signal input port RXD, data sending terminal mouth P0.1, data sending terminal mouth P0.2, bridge road Continuity signal output port IRO0, bridge road Continuity signal output port IRO1, H bridge power control signal outfan IDA, ac signal acquisition port ADC1, direct current signal gathers port ADC2, primary signal gathers port ADC3, voltage sample port ADC0 and DVV port.
As shown in Figure 6, voltage-dividing detection circuit 11 of the present utility model comprise the divider resistance R2 between electric energy output end and ground and resistance R4 that are connected on accumulator 2, the voltage sample port ADC0 of single-chip microcomputer is connected to the junction between resistance R2 and resistance R4.
Photo-electric blood oxygen detection of the present utility model operationally, first external mobile device is connected by audio interface and detector, and send wake-up signal by R channel to single-chip microcomputer 10, the audio signal of travel frequency is sent to supplying electric resonant circuit 1 with reception resonance circuit 3 by L channel and R channel again by mobile device, resonance amplification is carried out by for electric resonant circuit 1 and reception resonance circuit 3, respectively by after stabilivolt D1 and stabilivolt D2, the storage capacitor C1 of accumulator 2 is charged again, the voltage of voltage-dividing detection circuit 11 Real-time Collection storage capacitor C1 simultaneously, if the voltage of storage capacitor C1 does not also reach the running voltage of setting, then send audio frequency information converting by single-chip microcomputer 10 by data sending terminal mouth P0.1, if voltage does not change after now data sending terminal mouth P0.1 transmission, then send audio frequency information converting by data sending terminal mouth P0.2 again, after external mobile device increases audio frequency, the voltage of storage capacitor C1 is gathered again by voltage-dividing detection circuit 11, until meet operating voltage requirement, and charging completion signal is sent by single-chip microcomputer 10 by microphone lines road direction mobile device after reaching running voltage, the signal receiving circuit 5 connected by R channel by mobile device again sends acquisition to single-chip microcomputer, now, L channel is still in charged state, again charged state will be entered after R channel is transmitted acquisition, when carrying out data acquisition, first control electronic switching circuit 6 by single-chip microcomputer 10 and send connection order, turn-on voltage regulating circuit 8, the power supply of H-bridge circuit 7 and discharge circuit 9, the bridge road, diagonal angle controlling H-bridge circuit 7 by single-chip microcomputer 10 again replaces break-make, make infrared light emitting diodes and red light-emitting diode alternately luminous, again by photodiode Real-time Collection optical signal, and then pass through the amplification of discharge circuit 9 settling signal, MUX switching signal transmission path is controlled according to energy consumption again by single-chip microcomputer 10, if electric energy is sufficient, then the AC compounent that discharge circuit 9 exports can be separated with DC component by filter circuit, single-chip microcomputer 10 can be gathered two paths of signals respectively, if electric energy is not enough, then direct output signal by discharge circuit 9 sends to single-chip microcomputer 10 to gather, finally again the data gathered are sent to external mobile device by mike circuit by single-chip microcomputer 10 again, so far the collection of oximetry data is completed, after whole oximetry data collection completes, ON-and OFF-command is sent to electronic switching circuit 6 by single-chip microcomputer 10, off voltage regulating circuit 8, the power supply of H-bridge circuit 7 and discharge circuit 9, single-chip microcomputer 10 also enters low-power consumption mode simultaneously.
Claims (10)
1. based on a photo-electric blood oxygen detection for audio port, it is characterized in that: comprise audio interface, for electric resonant circuit, receive resonance circuit, signal receiving circuit, accumulator, electronic switching circuit, single-chip microcomputer, voltage regulator circuit, H-bridge circuit, infrared light emitting diodes, red light-emitting diode, photodiode, discharge circuit, filter circuit and MUX; Described audio interface is made up of L channel circuit, R channel circuit and mike circuit, described L channel circuit is connected with the resonance signal input for electric resonant circuit, described R channel circuit is connected with the resonance signal input receiving resonance circuit, and described mike circuit is connected with the data sending terminal mouth of single-chip microcomputer; The described resonance signal outfan for electric resonant circuit is connected with the electrical energy inputs of accumulator, and the resonance signal outfan of described reception resonance circuit is connected with the electrical energy inputs of accumulator and the signal input part of signal receiving circuit respectively; The signal output part of described signal receiving circuit is connected with the signal input port of single-chip microcomputer; The power end of the electric energy output end of described accumulator and the input of electronic switching circuit and single-chip microcomputer be connected, the control end of described electronic switching circuit is connected with the switch controlling signal output port of single-chip microcomputer, and the outfan of described electronic switching circuit is connected with the feeder ear of the feeder ear of voltage regulator circuit, the high-pressure side of H-bridge circuit, the feeder ear of discharge circuit and filter circuit respectively; The control signal end of described voltage regulator circuit is connected with the H bridge power control signal outfan of single-chip microcomputer, and the controllable voltage outfan of described voltage regulator circuit is connected with the low-pressure end of H-bridge circuit; Described infrared light emitting diodes and red light-emitting diode are connected on the intermediate transverse girder of H-bridge circuit, and the bias polarity of infrared light emitting diodes and red light-emitting diode is contrary; The bridge road Continuity signal input of described H-bridge circuit is connected with the bridge road Continuity signal output port of single-chip microcomputer; The signal output part of described photodiode is connected with the signal input part of discharge circuit, and the signal output part of described discharge circuit is connected with the signal input part of MUX; The control end of described MUX is connected with the selection control port of single-chip microcomputer, and the input that the two paths of signals outfan of described MUX gathers port and filter circuit with the primary signal of single-chip microcomputer is respectively connected; The AC compounent outfan of described filter circuit gathers port with the ac signal acquisition port of single-chip microcomputer with direct current signal respectively with DC component outfan and is connected;
Described signal receiving circuit is used for the square-wave pulse signal harmonic wave signal receiving resonance circuit output being converted to single-chip microcomputer identification; Described H-bridge circuit only has the Liang Geqiao road conducting at one group of diagonal angle at synchronization; The control signal that described voltage regulator circuit is used for sending according to the H bridge power control signal outfan of single-chip microcomputer changes the output voltage values of the controllable voltage outfan of voltage regulator circuit; Described photodiode just to infrared light emitting diodes and red light-emitting diode, for gathering the optical signal that infrared light emitting diodes and red light-emitting diode send; Described discharge circuit is used for carrying out processing and amplifying to the acquired signal that the signal output part of photodiode sends.
2. the photo-electric blood oxygen detection based on audio port according to claim 1, it is characterized in that: also comprise voltage-dividing detection circuit, the high-pressure side of described voltage-dividing detection circuit is connected with the electric energy output end of accumulator, and a point pressure side for described voltage-dividing detection circuit is connected with the voltage sample port of single-chip microcomputer.
3. the photo-electric blood oxygen detection based on audio port according to claim 1 and 2, is characterized in that: also comprise an alarm, described alarm is connected with the alarm signal output ends of single-chip microcomputer.
4. the photo-electric blood oxygen detection based on audio port according to claim 1 and 2, it is characterized in that: the described electric resonant circuit that supplies comprises oscillating capacitance C2, oscillating capacitance C4 and vibration inductance L 1, be in parallel with vibration inductance L 1 after described oscillating capacitance C2 and oscillating capacitance C4 connects, the described resonance signal input for electric resonant circuit is positioned at oscillating capacitance C2 and oscillating capacitance C4 junction; One end ground connection of described vibration inductance L 1, the other end is the resonance signal outfan for electric resonant circuit.
5. the photo-electric blood oxygen detection based on audio port according to claim 1 and 2, it is characterized in that: between the described resonance signal outfan for electric resonant circuit and the electrical energy inputs of accumulator, be provided with stabilivolt D1, the positive pole of described stabilivolt D1 is connected with the resonance signal outfan for electric resonant circuit, and the described negative pole of stabilivolt D1 is connected with the electrical energy inputs of accumulator.
6. the photo-electric blood oxygen detection based on audio port according to claim 1 and 2, it is characterized in that: described reception resonance circuit comprises oscillating capacitance C5, oscillating capacitance C6 and vibration inductance L 2, be in parallel with vibration inductance L 2 after described oscillating capacitance C5 and oscillating capacitance C6 connects, the resonance signal input of described reception resonance circuit is positioned at oscillating capacitance C5 and oscillating capacitance C6 junction; One end ground connection of described vibration inductance L 2, the other end is the resonance signal outfan receiving resonance circuit.
7. the photo-electric blood oxygen detection based on audio port according to claim 1 and 2, it is characterized in that: between the resonance signal input of described reception resonance circuit and the electrical energy inputs of accumulator, be provided with stabilivolt D2, the positive pole of described stabilivolt D2 is connected with the resonance signal outfan receiving resonance circuit, and the described negative pole of stabilivolt D2 is connected with the electrical energy inputs of accumulator.
8. the photo-electric blood oxygen detection based on audio port according to claim 1 and 2, it is characterized in that: described signal receiving circuit comprises detector diode D3, electric capacity C7 and resistance R8, the positive pole of described detector diode D3 is connected with the resonance signal outfan receiving resonance circuit, and the described negative pole of detector diode D3 is connected with the signal input port of single-chip microcomputer; One end of described electric capacity C7 is connected with the negative pole of detector diode D3, other end ground connection; One end of described resistance R8 is connected with the negative pole of detector diode D3, other end ground connection.
9. the photo-electric blood oxygen detection based on audio port according to claim 1 and 2, it is characterized in that: be also provided with voltage adaptation circuit between described mike circuit and the data sending terminal mouth of single-chip microcomputer, described voltage adaptation circuit comprises pull down resistor R7, adapts to resistance R5 and adapt to resistance R6; The resistance of described adaptation resistance R5 is greater than the resistance adapting to resistance R6; Described adaptation resistance R5 is connected with mike circuit after being connected with the one end adapting to resistance R6 again, and described adaptation resistance R5 is connected to the different data sending terminal mouth of single-chip microcomputer respectively with the other end adapting to resistance R6; One end of described pull down resistor R7 is connected to the junction adapting to resistance R5 and adapt to resistance R6, other end ground connection.
10. the photo-electric blood oxygen detection based on audio port according to claim 1 and 2, is characterized in that: described voltage regulator circuit comprises resistance R16, resistance R19, resistance R20, audion Q6 and audion Q7; The described colelctor electrode of audion Q6 is connected with the low-pressure end of H-bridge circuit, and the emitter stage of described audion Q6 is connected with one end of resistance R19, and the base stage of described audion Q6 is connected with the colelctor electrode of audion Q7; The colelctor electrode of described audion Q7 is also connected with one end of resistance R16, the grounded emitter of described audion Q7, and the base stage of described audion Q7 is connected with the H bridge power control signal outfan of single-chip microcomputer; The described other end of resistance R16 is connected with the outfan of electronic switching circuit; The other end ground connection of described resistance R19; One end of described resistance R20 is connected with the base stage of audion Q7, the other end ground connection of described resistance R20; Described audion Q6 is NPN type triode, and described audion Q7 is PNP type triode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420746219.1U CN204274468U (en) | 2014-12-01 | 2014-12-01 | Photoelectric blood oxygen detector based on audio port |
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| CN201420746219.1U CN204274468U (en) | 2014-12-01 | 2014-12-01 | Photoelectric blood oxygen detector based on audio port |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107212877A (en) * | 2017-05-24 | 2017-09-29 | 西安电子科技大学 | Variable gain mixer amplifier, biological signal collecting and process chip and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107212877A (en) * | 2017-05-24 | 2017-09-29 | 西安电子科技大学 | Variable gain mixer amplifier, biological signal collecting and process chip and system |
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