CN104573317A - Photoelectric health parameter detector based on audio port - Google Patents
Photoelectric health parameter detector based on audio port Download PDFInfo
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- CN104573317A CN104573317A CN201410718254.7A CN201410718254A CN104573317A CN 104573317 A CN104573317 A CN 104573317A CN 201410718254 A CN201410718254 A CN 201410718254A CN 104573317 A CN104573317 A CN 104573317A
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Abstract
The invention provides a photoelectric health parameter detector based on an audio port. The photoelectric health parameter detector comprises an audio interface, a power supply resonance circuit, a receiving resonance circuit, a signal receiving circuit, an energy storage circuit, an electronic switch circuit, a single chip microprocessor, a voltage regulation circuit, a bridge H circuit, an infrared light emitting diode, a red-light light emitting diode, a photoelectric diode and an operational amplifier circuit; the signal receiving circuit is used for converting a resonance waveform signal outputted by the receiving resonance circuit to a square wave pulse signal recognized by the single chip microprocessor; the voltage regulation circuit is used for changing the output voltage value on a controllable voltage output end of the voltage regulation circuit according to the control signal transmitted by the H-bridge power supply control signal output end of the single chip microprocessor; the operational amplifier circuit is used for amplifying an acquisition signal transmitted by the signal output end of the photoelectric diode. The detector is low in error rate and relatively high in universality, does not need to be self powered and is relatively high in market application prospect.
Description
Technical field
The present invention relates to a kind of photo-electric health parameters detector, especially a kind of photo-electric health parameters detector 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 peripherals and application also get more and more.These peripherals 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 peripherals and the communication mode of mobile terminal mainly contain with under type: 1) radio communication, mainly use Bluetooth technology, WiFi, two generations and three generations's communication technology, advantage is that the communication technology is ripe, applied widely, shortcoming is that to be ravesdropping the possibility 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 peripherals by mobile phone USB interface; 3) use audio port communication, most popular is La Kala equipment, and its mode adopted is simulating 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 peripherals 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 problem to be solved in the present invention is that the bit error rate adopting audio port to communicate in prior art is higher, universality is low, and can not power for peripherals.
In order to solve the problems of the technologies described above, the invention provides a kind of photo-electric health parameters detector based on audio port, comprise audio interface, for electric resonant circuit, receive resonant circuit, signal receiving circuit, tank circuit, electronic switching circuit, single-chip microcomputer, voltage regulator circuit, H-bridge circuit, infrared light emitting diodes, red light-emitting diode, photodiode and discharge circuit; Audio interface is made up of L channel circuit, R channel circuit and microphone circuit, L channel circuit is connected with the resonance signal input end for electric resonant circuit, R channel circuit is connected with the resonance signal input end receiving resonant circuit, and microphone circuit is connected with the data sending terminal mouth of single-chip microcomputer; Resonance signal output terminal for electric resonant circuit is connected with the electrical energy inputs of tank circuit, and the resonance signal output terminal receiving resonant circuit is connected with the electrical energy inputs of tank circuit 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 tank circuit and the input end 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 output terminal 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 and discharge circuit respectively; The control signal end of voltage regulator circuit is connected with the H bridge power control signal output terminal of single-chip microcomputer, and the controllable voltage output terminal 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 end 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 signals collecting port of single-chip microcomputer;
Signal receiving circuit is used for the square-wave pulse signal harmonic wave signal receiving resonant 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 output terminal of single-chip microcomputer changes the output voltage values of the controllable voltage output terminal of voltage regulator circuit; Photodiode just to infrared light emitting diodes and red light-emitting diode, for gathering the light signal that infrared light emitting diodes and red light-emitting diode send; Discharge circuit is used for carrying out amplification process to the collection 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 tank circuit, 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 resonant circuit receives R channel transmission, electric energy can also be provided to store for tank circuit when not carrying out Signal reception, further increase the charge efficiency of tank circuit, the acquisition time that the duration of charging extends oximetry data is shortened within limited detection time, enhance the data acquisition success ratio 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 dormant state, effectively save the loss of electric energy, improve the single charge utilization factor of tank circuit; Adopt signal receiving circuit the harmonic wave signal receiving resonant 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 factor 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 design simultaneously; Adopt discharge circuit can carry out amplification process to the signal of photodiode collection, the A/D of single-chip microcomputer is held can effectively be gathered.
Scheme as a further improvement on the present invention, also comprises voltage-dividing detection circuit, and the high-pressure side of voltage-dividing detection circuit is connected with the electric energy output end of tank circuit, 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 tank circuit 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 sound signal of corresponding frequencies according to frequency adjustment request by mobile device, make to obtain best resonance effect for electric resonant circuit, thus make tank circuit obtain the electric energy of enough voltage further.
Scheme as a further improvement on the present invention, 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 invention, 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 end 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 output terminal 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 tank circuit charges.
Scheme as a further improvement on the present invention, supply to be provided with stabilivolt D1 between the resonance signal output terminal of electric resonant circuit and the electrical energy inputs of tank circuit, the positive pole of stabilivolt D1 is connected with the resonance signal output terminal for electric resonant circuit, and the negative pole of stabilivolt D1 is connected with the electrical energy inputs of tank circuit.The resonance signal adopting stabilivolt D1 the resonance signal output terminal for electric resonant circuit can be exported carries out calm disposing, further increases the charging effect of tank circuit.
As further restriction scheme of the present invention, receive resonant 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 end receiving resonant 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 output terminal receiving resonant circuit.Adopt this reception resonant circuit effectively can improve the resonance effect of the frequency signal that R channel receives, thus successfully for tank circuit charges.
Scheme as a further improvement on the present invention, receive between the resonance signal input end of resonant circuit and the electrical energy inputs of tank circuit and be provided with stabilivolt D2, the positive pole of stabilivolt D2 is connected with the resonance signal output terminal receiving resonant circuit, and the negative pole of stabilivolt D2 is connected with the electrical energy inputs of tank circuit.Adopt stabilivolt D2 the resonance signal that the resonance signal output terminal receiving resonant circuit exports can be carried out calm disposing, further increase the charging effect of tank circuit.
As further restriction scheme of the present invention, 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 output terminal receiving resonant 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 output terminal output of receiving resonant 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 invention, be also provided with voltage adaptation circuit between the data sending terminal mouth of microphone 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 microphone 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 microphone 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 faculty of detector.
As further restriction scheme of the present invention, voltage regulator circuit comprises resistance R16, resistance R19, resistance R20, triode Q6 and triode Q7; The collector of triode Q6 is connected with the low pressure end of H-bridge circuit, and the emitter of triode Q6 is connected with one end of resistance R19, and the base stage of triode Q6 is connected with the collector of triode Q7; The collector of triode Q7 is also connected with one end of resistance R16, the grounded emitter of triode Q7, and the base stage of triode Q7 is connected with the H bridge power control signal output terminal of single-chip microcomputer; The other end of resistance R16 is connected with the output terminal of electronic switching circuit; The other end ground connection of resistance R19; One end of resistance R20 is connected with the base stage of triode Q7, the other end ground connection of resistance R20; Triode Q6 is NPN type triode, and triode Q7 is PNP type triode.The square-wave signal adopting single-chip microcomputer to send different frequency controls the break-make of triode Q7, the controllable voltage output terminal 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 users, improve the universality of detector.
Beneficial effect of the present invention is: (1) adopts the frequency signal receiving L channel transmission for electric resonant circuit, electric energy can be provided to store for tank circuit, 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 resonant circuit reception R channel and transmit is adopted, electric energy can also be provided to store for tank circuit when not carrying out Signal reception, further increase the charge efficiency of tank circuit, the acquisition time that the duration of charging extends oximetry data is shortened within limited detection time, enhance the data acquisition success ratio 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 dormant state, effectively save the loss of electric energy, improve the single charge utilization factor of tank circuit; (4) signal receiving circuit is adopted the harmonic wave signal receiving resonant 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 factor 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 design simultaneously; (6) adopt discharge circuit can carry out amplification process to the signal of photodiode collection, the A/D of single-chip microcomputer is held can effectively be gathered.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is audio port circuit connection structure schematic diagram of the present invention;
Fig. 3 is H-bridge circuit of the present invention and voltage regulator circuit structural representation;
Fig. 4 is discharge circuit structural representation of the present invention;
Fig. 5 is one-chip machine port schematic diagram of the present invention;
Fig. 6 is voltage-dividing detection circuit structural representation of the present invention;
Fig. 7 is the resonance signal that reception resonant circuit of the present invention exports;
Fig. 8 is the square-wave pulse signal obtained after signal receiving circuit process of the present invention.
Embodiment
As shown in Figure 1, the invention provides a kind of photo-electric health parameters detector based on audio port, comprise audio interface, for electric resonant circuit 1, receive resonant circuit 3, signal receiving circuit 5, tank circuit 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 and discharge circuit 9; Audio interface is made up of L channel circuit, R channel circuit and microphone circuit, L channel circuit is connected with the resonance signal input end for electric resonant circuit 1, R channel circuit is connected with the resonance signal input end receiving resonant circuit 3, and microphone circuit is connected with the data sending terminal mouth of single-chip microcomputer 10; Resonance signal output terminal for electric resonant circuit 1 is connected with the electrical energy inputs of tank circuit 2, and the resonance signal output terminal receiving resonant circuit 3 is connected with the electrical energy inputs of tank circuit 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 tank circuit 2 and the input end 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 output terminal of electronic switching circuit 6 is connected with the feeder ear of the feeder ear of voltage regulator circuit 8, the high-pressure side of H-bridge circuit 7 and discharge circuit 9 respectively; The control signal end of voltage regulator circuit 8 is connected with the H bridge power control signal output terminal of single-chip microcomputer 10, and the controllable voltage output terminal 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 end 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 signals collecting port of single-chip microcomputer 10;
Signal receiving circuit 5 is for being converted to receiving the harmonic wave signal that exports of resonant 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 output terminal of voltage regulator circuit 8 for the control signal sent according to the H bridge power control signal output terminal of single-chip microcomputer 10; Photodiode just to infrared light emitting diodes and red light-emitting diode, for gathering the light signal that infrared light emitting diodes and red light-emitting diode send; Discharge circuit 9 carries out amplification process for the collection signal sent the signal output part of photodiode.
In order to detect according to reality the voltage that voltage regulates tank circuit 2 in real time, the voltage of tank circuit 2 is enable to meet the electric energy of the energy consuming circuitry of detector, the present invention 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 tank circuit 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 tank circuit 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 sound 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 tank circuit 2 obtain the electric energy of enough voltage further.
In order to detector can be made to possess independently warning function, the present invention 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 invention 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 invention 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 end 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 output terminal 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 tank circuit charges.
In order to improve the charging effect of tank circuit 2 further, stabilivolt D1 is provided with between resonance signal output terminal for electric resonant circuit 1 of the present invention and the electrical energy inputs of tank circuit, the positive pole of stabilivolt D1 is connected with the resonance signal output terminal for electric resonant circuit, and the negative pole of stabilivolt D1 is connected with the electrical energy inputs of tank circuit.The resonance signal adopting stabilivolt D1 the resonance signal output terminal for electric resonant circuit 1 can be exported carries out calm disposing, further increases the charging effect of tank circuit 2.
Reception resonant circuit 3 of the present invention 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 end receiving resonant 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 output terminal receiving resonant circuit, and the multiple that reception resonant circuit 3 amplifies the frequency signal amplitude that R channel receives is 50 ~ 200.Adopt this reception resonant circuit 3 effectively can improve the resonance effect of the frequency signal that R channel receives, thus successfully charge for tank circuit 2.
In order to improve the charging effect of tank circuit 2 further, stabilivolt D2 is provided with between the resonance signal input end of reception resonant circuit of the present invention and the electrical energy inputs of tank circuit, the positive pole of stabilivolt D2 is connected with the resonance signal output terminal receiving resonant circuit, and the negative pole of stabilivolt D2 is connected with the electrical energy inputs of tank circuit.Adopt stabilivolt D2 the resonance signal that the resonance signal output terminal receiving resonant circuit 3 exports can be carried out calm disposing, further increase the charging effect of tank circuit 2.
As shown in Fig. 1,7 and 8, signal receiving circuit 5 of the present invention comprises detector diode D3, electric capacity C7 and resistance R8, the positive pole of detector diode D3 is connected with the resonance signal output terminal receiving resonant 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 output terminal output of the receipts that achieve a butt joint resonant 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, the present invention is also provided with voltage adaptation circuit 4 between microphone 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 microphone 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 microphone 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 faculty of detector.
As shown in Figure 3, H-bridge circuit of the present invention is conventional H-bridge circuit, comprise altogether symmetrical four Ge Qiao roads, the high-pressure side of H-bridge circuit is connected with the output terminal 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 end 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 end 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 invention comprises resistance R16, resistance R19, resistance R20, triode Q6 and triode Q7; The collector of triode Q6 is connected with the low pressure end of H-bridge circuit, and the emitter of triode Q6 is connected with one end of resistance R19, and the base stage of triode Q6 is connected with the collector of triode Q7; The collector of triode Q7 is also connected with one end of resistance R16, the grounded emitter of triode Q7, and the base stage of triode Q7 is connected with the H bridge power control signal output terminal IDA of single-chip microcomputer; The other end of resistance R16 is connected with the output terminal 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 triode Q7, the other end ground connection of resistance R20; Triode Q6 is NPN type triode, and triode 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 triode Q7, the controllable voltage output terminal 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 users, improve the universality of detector.
As shown in Figure 4, discharge circuit 9 of the present invention is common discharge circuit, for the collection signal of photodiode is amplified 8 ~ 10 times, wherein, PHO+ with PHO-is connected with the both positive and negative polarity of photodiode respectively, and signal output part is connected with the signals collecting port ADC1 of single-chip microcomputer 10, and VAA voltage is provided by the output terminal 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 collection signal is 50 ~ 150.
As shown in Figure 5, single-chip microcomputer 10 of the present invention, 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 output terminal IDA, signals collecting port ADC1, voltage sample port ADC0 and DVV port.
As shown in Figure 6, voltage-dividing detection circuit 11 of the present invention comprise the divider resistance R2 between electric energy output end and ground and resistance R4 that are connected on tank circuit 2, the voltage sample port ADC0 of single-chip microcomputer is connected to the junction between resistance R2 and resistance R4.
Photo-electric health parameters detector of the present invention 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 sound signal of travel frequency is sent to supplying electric resonant circuit 1 with reception resonant 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 resonant circuit 3, respectively by after stabilivolt D1 and stabilivolt D2, the storage capacitor C1 of tank circuit 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 operating 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 operating 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 light signal, and then gathered for single-chip microcomputer 10 by the amplification of discharge circuit 9 settling signal, the signal gathered is sent to external mobile device by microphone circuit by last 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 health parameters detector for audio port, it is characterized in that: comprise audio interface, for electric resonant circuit, receive resonant circuit, signal receiving circuit, tank circuit, electronic switching circuit, single-chip microcomputer, voltage regulator circuit, H-bridge circuit, infrared light emitting diodes, red light-emitting diode, photodiode and discharge circuit; Described audio interface is made up of L channel circuit, R channel circuit and microphone circuit, described L channel circuit is connected with the resonance signal input end for electric resonant circuit, described R channel circuit is connected with the resonance signal input end receiving resonant circuit, and described microphone circuit is connected with the data sending terminal mouth of single-chip microcomputer; The described resonance signal output terminal for electric resonant circuit is connected with the electrical energy inputs of tank circuit, and the resonance signal output terminal of described reception resonant circuit is connected with the electrical energy inputs of tank circuit 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 tank circuit and the input end 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 output terminal 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 and discharge circuit respectively; The control signal end of described voltage regulator circuit is connected with the H bridge power control signal output terminal of single-chip microcomputer, and the controllable voltage output terminal 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 end 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 signals collecting port of single-chip microcomputer;
Described signal receiving circuit is used for the square-wave pulse signal harmonic wave signal receiving resonant 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 output terminal of single-chip microcomputer changes the output voltage values of the controllable voltage output terminal of voltage regulator circuit; Described photodiode just to infrared light emitting diodes and red light-emitting diode, for gathering the light signal that infrared light emitting diodes and red light-emitting diode send; Described discharge circuit is used for carrying out amplification process to the collection signal that the signal output part of photodiode sends.
2. the photo-electric health parameters detector 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 tank circuit, 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 health parameters detector based on audio port according to claim 1, 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 health parameters detector based on audio port according to claim 1,2 or 3, 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 end 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 output terminal for electric resonant circuit.
5. the photo-electric health parameters detector based on audio port according to claim 1,2 or 3, it is characterized in that: between the described resonance signal output terminal for electric resonant circuit and the electrical energy inputs of tank circuit, be provided with stabilivolt D1, the positive pole of described stabilivolt D1 is connected with the resonance signal output terminal for electric resonant circuit, and the described negative pole of stabilivolt D1 is connected with the electrical energy inputs of tank circuit.
6. the photo-electric health parameters detector based on audio port according to claim 1,2 or 3, it is characterized in that: described reception resonant 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 end of described reception resonant 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 output terminal receiving resonant circuit.
7. the photo-electric health parameters detector based on audio port according to claim 1,2 or 3, it is characterized in that: between the resonance signal input end of described reception resonant circuit and the electrical energy inputs of tank circuit, be provided with stabilivolt D2, the positive pole of described stabilivolt D2 is connected with the resonance signal output terminal receiving resonant circuit, and the described negative pole of stabilivolt D2 is connected with the electrical energy inputs of tank circuit.
8. the photo-electric health parameters detector based on audio port according to claim 1,2 or 3, 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 output terminal receiving resonant 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 health parameters detector based on audio port according to claim 1,2 or 3, it is characterized in that: be also provided with voltage adaptation circuit between described microphone 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 microphone 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 health parameters detector based on audio port according to claim 1,2 or 3, is characterized in that: described voltage regulator circuit comprises resistance R16, resistance R19, resistance R20, triode Q6 and triode Q7; The described collector of triode Q6 is connected with the low pressure end of H-bridge circuit, and the emitter of described triode Q6 is connected with one end of resistance R19, and the base stage of described triode Q6 is connected with the collector of triode Q7; The collector of described triode Q7 is also connected with one end of resistance R16, the grounded emitter of described triode Q7, and the base stage of described triode Q7 is connected with the H bridge power control signal output terminal of single-chip microcomputer; The described other end of resistance R16 is connected with the output terminal 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 triode Q7, the other end ground connection of described resistance R20; Described triode Q6 is NPN type triode, and described triode Q7 is PNP type triode.
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| CN105118282A (en) * | 2015-09-07 | 2015-12-02 | 无锡力芯微电子股份有限公司 | Infrared remote control equipment and system based on headphone interface |
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| CN112073030A (en) * | 2020-08-12 | 2020-12-11 | 武汉博畅通信设备有限责任公司 | Electrically tunable filter |
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| CN112073030A (en) * | 2020-08-12 | 2020-12-11 | 武汉博畅通信设备有限责任公司 | Electrically tunable filter |
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Effective date of registration: 20170725 Address after: 510000 No. 8, Tang Tong Road, Yonghe Economic Zone, Guangzhou Economic Development Zone, Guangdong, 0104 Patentee after: Wound Hong Yi Electronic Science and Technology Co., Ltd. is thought in Guangzhou Address before: Nanjing City, Jiangsu province 210023 City Xianlin University No. 99 Patentee before: Nanjing College of Information Technology |