CN201194798Y - Pulse oximetry - Google Patents
Pulse oximetry Download PDFInfo
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- CN201194798Y CN201194798Y CNU2008200937423U CN200820093742U CN201194798Y CN 201194798 Y CN201194798 Y CN 201194798Y CN U2008200937423 U CNU2008200937423 U CN U2008200937423U CN 200820093742 U CN200820093742 U CN 200820093742U CN 201194798 Y CN201194798 Y CN 201194798Y
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Abstract
The utility model provides a pulse oximeter, the power end of a microprocessor of which is connected with one electrical energy output end of a power management unit (PMU). An automatic starting-up/shutdown unit which is used for sending a control signal switching on the power supply of an exploring block to the PMU in time, and detecting a detection signal obtained by the detection signal input port of the microprocessor as well as sending a power control signal to the PMU according to the detection result, and is used for causing the pulse oximeter to be in a starting-up or holding state. The pulse oximeter can automatically sense whether a sensor senses detected objects or not, and realizes that the power supplies of the exploring block and a display component can be automatically switched on and shut off by the pulse oximeter.
Description
Technical field
This utility model relates to the field of measuring technique of pulse, in particular, but the pulse blood oxygen instrument of a kind of Auto Power On or automatic shutdown.
Background technology
Existing pulse blood oxygen detector is developed according to youth primary-Bill (Lamber-Beer) law, its principle is: material is directly proportional at the absorbance at certain wavelength place and its concentration, when the illumination of constant wavelength is mapped on the tissue, reflected the architectural feature of illuminated position tissue to a certain extent by the light intensity that measures behind tissue absorption, the reflection loss.Because (600nm～1000nm) unique absorption spectrum is arranged utilizes these characteristics, just can measure the human body blood oxygen saturation in HONGGUANG, infrared light district for HbO2 Oxyhemoglobin (HbO2) and reduced hemoglobin in the blood.The measuring method of detecting sphygmus and blood oxygen saturation is the periphery position (as finger or ear-lobe etc.) that the redness sent of the light emitting diode with two kinds of wavelength and infrared light see through health, detect the optical signal of transmission by the light sensor of offside, different with the absorbance of reduced hemoglobin according to HONGGUANG and infrared light again characteristics to HbO2 Oxyhemoglobin, the testing circuit variation waveform that light that artery blood flow caused absorbs that obtains earlier pulsing calculates detecting sphygmus and blood oxygen saturation and pulse frequency value then in view of the above.
In existing pulse blood oxygen detector, mainly be the startup and shutdown process that realizes blood oxygen instrument by key mode, as shown in Figure 1.System mainly is made up of power pack, Sensor section, luminous tube drive part, display part, button part, signal processing (pulse blood oxygen instrument as the light frequency change type does not have this part in some designs).Its work process is: after button was pressed, power pack began to pick off, luminous tube driving, signal processing, MCU and display part power supply, and system opens, and measures; After measuring end, by button, the power supply of parting system is supplied with, and system enters off-mode.Start measurement and demonstration owing to before each the measurement, need to press shift knob, and after measurement is finished, press the button shutdown,,, shorten the service time of battery if forget that shutdown then can increase the power consumption of system so cause complex operation.For incorporate finger formula pulse blood oxygen instrument, when user is worn on it when measuring on the finger, press by button whole instrument is exerted pressure to finger, cause the arterial capillary at tested position partly to be blocked, thereby influence pulse intensity, cause measurement error.The power consumption of meeting increase system, battery can run low very much.
Therefore, there is defective definitely in prior art, needs to improve further.
The utility model content
The purpose of this utility model is to provide a kind of pulse blood oxygen instrument, and it can realize the automatic unlatching of pulse blood oxygen instrument or close, thereby has reduced the instrument power consumption, and avoids the measurement error brought by key switch.
The technical solution of the utility model is as follows:
A kind of pulse blood oxygen instrument, it comprises: exploring block, display unit, microprocessor and be used to provide the Power Management Unit of electric energy, described exploring block comprises: the HONGGUANG pipe, infrared tube, the sensor unit that is used to drive the luminous tube driver of HONGGUANG pipe and infrared tube work and is used to receive detectable signal, the unitary outfan of described sensor links to each other with the detectable signal input port of microprocessor, the power end of described microprocessor connects an electric energy output end of described Power Management Unit, be provided with an automatic on/off unit in the described microprocessor, be used for regularly sending the control signal of opening described exploring block power supply to described Power Management Unit, and the detectable signal that obtained of the detectable signal input port of detecting described microprocessor, send power control signal according to testing result to described Power Management Unit, with so that described pulse blood oxygen instrument be in the start or holding state.
Wherein, described automatic on/off unit comprises: one is used for the intervalometer of timing, and the every timing of described intervalometer reaches a Preset Time, sends activation signal one time to described microprocessor, measure in order to activate described exploring block, and detectable signal is sent in the described microprocessor.
Wherein, described automatic on/off unit comprises: detecting signal unit, this unit links to each other with Power Management Unit with the detectable signal input port of described microprocessor, described detecting signal unit is used to detect the detectable signal that described detectable signal input port obtains, and judges the signal characteristic when whether this detectable signal wave character has sensor side and have measured object; When the feature of described detectable signal does not have signal characteristic when having measured object in the sensor side, described detecting signal unit sends the control signal that is used to close described exploring block and display unit power supply to described Power Management Unit, makes described pulse blood oxygen instrument be in holding state; When the feature of described detectable signal has signal characteristic when having measured object in the sensor side, described detecting signal unit sends the control signal that is used to open described exploring block and display unit power supply to described Power Management Unit, makes described pulse blood oxygen instrument be in open state.
Wherein, described automatic on/off unit also comprises: driving governor, this driving governor links to each other with the luminous tube driver with described intervalometer, and described driving governor is used to receive the activation signal of described intervalometer, and exports a default pumping signal to described luminous tube driver.
Wherein, to send pumping signal be narrow pulse signal to described driving governor.
Wherein, described Power Management Unit comprises:
The supply of electrical energy module is used to provide electric energy;
Be used to control first switch control unit of exploring block supply of electrical energy, this units in series is between the electric energy input of the outfan of described supply of electrical energy module and described sensor unit and luminous tube driver; And
Be used to control the second switch control unit of display unit supply of electrical energy, this units in series is between the electric energy input of the outfan of described supply of electrical energy module and described pulse blood oxygen instrument display unit;
The control end of described first switch control unit and second switch control unit links to each other with described automatic on/off unit, is used for receiving from the unitary power control signal of described automatic on/off.
Wherein, described automatic on/off unit also comprises: power-supply controller of electric, this controller links to each other with described intervalometer, first switch control unit and second switch control unit respectively, be used to receive the activation signal that described intervalometer sends, and send the control signal of opening the exploring block power supply to described first switch control unit, perhaps, send power control signal to the described second switch control unit and first switch control unit according to the unitary detectable signal testing result of described automatic on/off.
Wherein, described sensor unit is the optical frequency pick off, and the outfan of the signal of this pick off connects the detectable signal input port of described microprocessor; And,
Described detecting signal unit comprises: detectable signal waveform frequency comparing unit 232, this unit connects the detectable signal input port and the described Power Management Unit of described microprocessor, be used to receive described sensor unit detection signals fed back, and the waveform frequency of judgement present frame detectable signal and former frame detectable signal relation, send power control signal according to judged result to described Power Management Unit.
Wherein, described sensor unit comprises: photoelectric sensor, filter circuit, amplifying circuit and A/D change-over circuit; Described photoelectric sensor, filter circuit, amplifying circuit and A/D change-over circuit are connected successively, and the outfan of described A/D change-over circuit connects the detectable signal input port of described microprocessor.
Wherein, described detecting signal unit comprises:
Detectable signal wave-shape amplitude comparing unit, this unit connects the detectable signal input port and the described Power Management Unit of described microprocessor, be used to receive described sensor unit detection signals fed back, and the waveforms amplitude of judgement present frame detectable signal and former frame detectable signal relation, send power control signal according to judged result to described Power Management Unit.
Adopt such scheme, this utility model has or not tested object in the inductive transducer side automatically, realizes the power supply that opens and closes automatically exploring block and display unit of pulse blood oxygen instrument.This utility model can be applicable to refer to that the formula pulse blood oxygen detects, average current under standby mode can be low to moderate below the 100uA, after finger inserts pick off, power supply control start signal output Power Management Unit, pulse blood oxygen instrument can start measurement in 2 seconds; When the dislocation of finger joint after sensor side surpasses 5 seconds, power supply control output signal control Power Management Unit makes pulse blood oxygen instrument can enter standby mode automatically.
Description of drawings
Fig. 1 is the system structure sketch map of pulse blood oxygen instrument in the prior art;
Fig. 2 is a system structure sketch map of the present utility model;
Fig. 3 is the oscillogram of the detectable signal and the luminous tube driving signal of Auto Power On detection;
Fig. 4 automatically switches to the detectable signal of holding state and the oscillogram that luminous tube drives signal;
Fig. 5 is the unitary internal structure sketch map of automatic on/off;
Fig. 6 is a kind of structural representation of detecting signal unit;
Fig. 7 is the another kind of structural representation of detecting signal unit.
The specific embodiment
Describe the technical solution of the utility model in detail below in conjunction with accompanying drawing.
As shown in Figure 2, present embodiment provides a kind of pulse blood oxygen instrument with automatic on/off function, and it comprises that mainly following components comprises:
(1) exploring block, comprising: HONGGUANG pipe, infrared tube, be used to the sensor unit 500 that drives the luminous tube driver 700 of HONGGUANG pipe and infrared tube work and be used to receive detectable signal.Sensor unit 500 is used for receiving from tissue 600 detection signals fed back, this signal gathering unit can be optical frequency pick off or photoelectric sensor, if adopt photoelectric sensor, then should add filter circuit, amplifying circuit and A/D change-over circuit, photoelectric sensor, filter circuit, amplifying circuit and A/D change-over circuit are connected successively, and the detectable signal input port of the outfan of A/D change-over circuit connection microprocessor 200, be sent in the microprocessor 200 in order to the detectable signal after will handling.
(2) Power Management Unit 300, and it is used to pulse blood oxygen instrument that electric energy is provided, and carry out electric energy output control.
(3) display unit, it comprises: be used for display 100 that measurement result is shown.
(4) microprocessor 200 and corresponding system storage thereof, memorizer is used to store corresponding system data.The detectable signal input port of microprocessor 200 links to each other with described sensor unit 500, the processing that is used to send control signal He carries out detectable signal.
As shown in Figure 2, in the present embodiment, the power end of microprocessor 200 directly connects an electric energy output end of Power Management Unit 300, makes microprocessor 200 that supply of electrical energy be arranged all the time, and guarantees that it is operated in holding state.And present embodiment also is provided with an automatic on/off unit 210 in order to replace the start mode of available technology adopting button in above-mentioned microprocessor 200.The automatic on/off unit 210 that increases in the present embodiment is used for regularly sending to the control end of Power Management Unit 300 control signal of the described exploring block power supply of unlatching, promptly control Power Management Unit 300 and be luminous tube driver 700 and 500 power supplies of sensor unit, and the detectable signal that obtained of the detectable signal input port of detecting microprocessor 200, send power control signal according to testing result to Power Management Unit 300, use so that the pulse blood oxygen instrument of present embodiment is in start or holding state.
The operation principle of present embodiment is: open the pulse blood oxygen instrument machine and enter detecting pattern, if continuous a period of time of measured object comes off from sensor unit 500, when then microprocessor MCU just enters standby mode, this moment microprocessor MCU sending controling instruction, close the power supply of display unit, and according to the power supply of the detectable signal part (as sensor unit 500 and luminous tube driver 700) in the certain time sequence control pulse blood oxygen instrument system, promptly open the power supply of probe portion every the regular hour, survey whether sensor side has testee in the primary transducer detecting unit 500, and detection time is short as much as possible, after having surveyed, as also not detecting the existence of testee, then pulse blood oxygen instrument can enter holding state again, so just can guarantee the low-power consumption of blood oxygen instrument under standby or shutdown.In order to realize above-mentioned power supply by the exploring block in the certain time sequence control pulse blood oxygen instrument system, as shown in Figure 5, present embodiment adopts the activated mode of intervalometer timing.Mainly be that a timer 2 11 that is used for timing is set in the automatic on/off unit, described timer 2 11 every timing reach a Preset Time, send activation signal one time to described microprocessor 200, measure in order to activate described exploring block, and detectable signal is sent in the described microprocessor 200.
As shown in Figure 5, when the described microprocessor 200 of activation is surveyed, present embodiment also provides a kind of mode that luminous tube driver 700 is driven, as follows: that a driving governor 214 is set in automatic on/off unit 210, it links to each other with luminous tube driver 700 with described timer 2 11, described driving governor 214 is used to receive the activation signal of described intervalometer, and the pumping signal of after being timed device 211 activation, presetting to described luminous tube driver 700 outputs one, this activation signal can be a narrow pulse signal, shown in Fig. 3 and 4.Utilize narrow pulse signal that luminous tube driver 700 is driven and to guarantee the least in power-consuming of pulse blood oxygen instrument, also do not concluding when whether testee being arranged, the service life that guarantee to have minimum system power dissipation, prolongs battery.
As shown in Figure 3, present embodiment adopts narrow pulse signal as pumping signal, and driven for emitting lights pipe driver 700 is carried out preliminary detection operations.Among Fig. 3, in the first time and secondary detection, luminous tube driver 700 adopts the narrow pulse signal D of automatic opening/closing unit 210 as pumping signal, survey, after in surveying for the third time, detecting testee, the pulse width and the pulse frequency of the n-signal the when pulse-recovery of luminous tube driver 700 arrives normal the detection; When pro-did not detect measured object twice, the detection signal of importing in the microprocessor was a feature B signal, and this signal coincidence senser side does not have the detectable signal feature of measured object, surveys according to the cycle at this point; In surveying for the third time, detect testee, then variation has taken place in the wave character of the detectable signal of microprocessor reception, become feature C signal, there is the detectable signal feature when surveying thing in this feature C signal coincidence senser side, so just enters open state and begins to detect.Usually, for electro-optical pickoff, the wave character of detectable signal refers to the amplitude of waveform, if sensor side detects testee, then the amplitude of detectable signal can reduce; For optical frequency formula pick off, the wave character of signal refers to the frequency of signal, surveys thing if sensor side exists, and then the frequency of detectable signal can reduce.So can realize above-mentioned Auto Power On process according to these characteristics.
As shown in Figure 4, in the process of normal monitoring oxygen saturation, the driving signal of luminous tube adopts the feature n-signal, during the first five time detects, the signal that is input in the microprocessor is a feature C signal, and the detectable signal that is input to microprocessor in the 6th time detection is a feature B signal, this B signal indication measured object shifts out the signal that is detected after the sensor side, this moment, variation took place in the wave character of detectable signal, signal characteristic when this feature meets measured object and shifts out sensor side, from then on bleeding from anus oxygen instrument system enters standby mode, the driving signal of luminous tube returns to the narrow pulse signal every one-period, and with the long period detection, the detectable signal that microprocessor receives is a feature B signal.Usually, for electro-optical pickoff, the wave character of signal refers to the amplitude of waveform, shifts out sensor side if survey object, and then the amplitude of detectable signal can raise; For optical frequency formula pick off, the wave character of signal refers to the frequency of signal, shifts out sensor side if survey thing, and then the frequency of detectable signal can raise.
From Fig. 3 and Fig. 4 as seen, how to judge whether sensor side has testee, they mainly be the signal characteristic scope of seeing that whether the wave character of detectable signal in one-period that receives meets has when surveying thing, and for different pick offs, the examination criteria of changing features is also different.In order to realize the detection and the judgement of the 210 pairs of detectable signals in automatic on/off unit, as shown in Figure 5, present embodiment is provided with a detecting signal unit 212 in automatic on/off unit 210, this unit links to each other with Power Management Unit 300 with the detectable signal input port of timer 2 11, microprocessor 200, detecting signal unit 212 obtains detectable signal from the detectable signal input port of microprocessor 200, and the signal characteristic when detecting the waveform of judging detectable signal and whether having sensor side and have measured object; When the feature of detectable signal does not have signal characteristic when having measured object in the sensor side, detecting signal unit 212 sends the control signal that is used to close described exploring block and display unit power supply to Power Management Unit 300, make described pulse blood oxygen instrument be in holding state, at this moment timer 2 11 carries out the timing of next round, up to producing activation signal once more, automatic on/off unit 210 is moved once more; When the feature of described detectable signal has signal characteristic when having measured object in the sensor side, detecting signal unit 212 sends the control signal that is used to open described exploring block and display unit power supply to Power Management Unit 300, make described pulse blood oxygen instrument be in open state, routinely tissue 600 is surveyed then, luminous tube driver 700 reverts to the driving signal of normal detection usefulness, the long period timing is carried out in timer 2 11 zero clearings again.
For electro-optical pickoff, sensor side has the amplitude of waveform when surveying thing to change in a scope; For optical frequency formula pick off, sensor side has the frequency of waveform when surveying thing to change in a scope, and according to the characteristics of different sensors, also there is following different version in the inside of detecting signal unit.
As shown in Figure 6, when sensor unit 500 adopted electro-optical pickoff, described sensor unit 500 comprised: photoelectric sensor, filter circuit, amplifying circuit and A/D change-over circuit; Described photoelectric sensor, filter circuit, amplifying circuit and A/D change-over circuit are connected successively, and the outfan of described A/D change-over circuit connects the detectable signal input port of described microprocessor; At this moment, detecting signal unit 212 comprises:
Detectable signal wave-shape amplitude comparing unit 222, this unit connects the detectable signal input port and the described Power Management Unit of described microprocessor, be used to receive described sensor unit 500 detection signals fed back, and the waveforms amplitude of judgement present frame detectable signal and former frame detectable signal relation, send power control signal according to judged result to described Power Management Unit.Specifically, when the difference of the waveforms amplitude of present frame detectable signal and former frame detectable signal surpasses a preset range, and the waveforms amplitude of present frame detectable signal characterizes testee and shifts out from sensor side during greater than the waveforms amplitude of former frame detectable signal; Otherwise when the difference of the waveforms amplitude of present frame detectable signal and former frame detectable signal surpasses a preset range, and the waveforms amplitude of present frame detectable signal characterizes testee and appears at sensor side during less than the waveforms amplitude of former frame detectable signal.Here a said frame signal is meant, the pulse signal that microprocessor receives.
As shown in Figure 7, when sensor unit 500 adopted the optical frequency pick off, the outfan of the signal of this pick off connected the detectable signal input port of described microprocessor; At this moment, detecting signal unit 212 comprises:
Detectable signal waveform frequency comparing unit 232, this unit connects the detectable signal input port and the described Power Management Unit 300 of described microprocessor 200, be used to receive described sensor unit 500 detection signals fed back, and the waveform frequency of judgement present frame detectable signal and former frame detectable signal relation, send power control signals according to judged result to described Power Management Unit 300.Specifically, when the difference of the waveform frequency of present frame detectable signal and former frame detectable signal surpasses a preset range, and the waveform frequency of present frame detectable signal characterizes testee and shifts out from sensor side during greater than the waveform frequency of former frame detectable signal; Otherwise when the difference of the waveform frequency of present frame detectable signal and former frame detectable signal surpasses a preset range, and the waveform frequency of present frame detectable signal characterizes testee and appears at sensor side during less than the waveform frequency of former frame detectable signal.
From the description of technique scheme as can be seen, present embodiment can be controlled pulse blood oxygen instrument and can switch between holding state or open state automatically.The holding state here is exactly to have only intervalometer in the automatic on/off unit at the state according to certain logic working, closes the power supply of exploring block and display unit simultaneously; And said here open state just is meant the normal operating conditions of pulse blood oxygen instrument, the work of switching on simultaneously of exploring block and display unit.
As shown in Figure 5, for the ease of the supply of electrical energy of management exploring block and display unit, present embodiment is divided into following components with Power Management Unit 300:
Be used to provide the supply of electrical energy module 320 of electric energy, it links to each other with various piece, display 100 and the microprocessor 200 of exploring block respectively;
Be used to control first switch control unit 310 of exploring block supply of electrical energy, this units in series is between the electric energy input of the outfan of supply of electrical energy module 320 and sensor unit 500 and luminous tube driver 700;
Be used to control the second switch control unit 330 of display unit supply of electrical energy, this units in series is between the electric energy input of the outfan of supply of electrical energy module 320 and described pulse blood oxygen instrument display 100;
And the control end of first switch control unit 310 and second switch control unit 330 links to each other with automatic on/off unit 210, is used to receive the power control signal from described automatic on/off unit 210.First switch control unit 310 and second switch control unit 330 described here can be light Rhizoma Nelumbinis, switching device etc., and supply of electrical energy module 320 can be a battery, as lithium battery etc.
As shown in Figure 5, based on each ingredient of above-mentioned Power Management Unit 300, present embodiment adopts the mode that also is provided with a power-supply controller of electric 213 in above-mentioned automatic on/off unit 210, sends power control signal to Power Management Unit 300.Here power-supply controller of electric 213 links to each other with second switch control unit 330 with described timer 2 11, first switch control unit 310 respectively, be used to receive the activation signal that timer 2 11 sends, send the control signal of opening the exploring block power supply to first switch control unit 310, perhaps send power control signal to the second switch control unit 310 and first switch control unit 330 according to the detectable signal testing result of automatic on/off unit 210.
In sum, present embodiment adopt automatic on/off function replacement the mode of available technology adopting button machine open/close, it has the function of vicarious automatic on/off, when pick off is positioned over tested position, whether pulse blood oxygen instrument is surveyed at interval at regular intervals has measured object to exist, if any Auto Power On then.Guaranteed so can not to be specially adapted in the all-in-one because of pushing the blood flow state that influences tested position.And employing aforesaid way, make present embodiment also have the vicarious function of shutdown automatically: after pick off breaks away from tested position, in the regular hour, do not detect under the situation of useful signal, instrument can shut down automatically or be in standby mode, guarantee like this to measure and demonstration is closed, save system energy consumption.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of this utility model claims.
Claims (10)
1. pulse blood oxygen instrument, it comprises: exploring block, display unit, microprocessor and be used to provide the Power Management Unit of electric energy, described exploring block comprises: HONGGUANG pipe, infrared tube, the sensor unit that is used to drive the luminous tube driver of HONGGUANG pipe and infrared tube work and is used to receive detectable signal, the unitary outfan of described sensor links to each other with the detectable signal input port of microprocessor, it is characterized in that
The power end of described microprocessor connects an electric energy output end of described Power Management Unit, be provided with an automatic on/off unit in the described microprocessor, be used for regularly sending the control signal of opening described exploring block power supply to described Power Management Unit, and the detectable signal that obtained of the detectable signal input port of detecting described microprocessor, send power control signal according to testing result to described Power Management Unit, with so that described pulse blood oxygen instrument be in the start or holding state.
2. pulse blood oxygen instrument according to claim 1, it is characterized in that, described automatic on/off unit comprises: one is used for the intervalometer of timing, the every timing of described intervalometer reaches a Preset Time, send activation signal one time to described microprocessor, measure in order to activate described exploring block, and detectable signal is sent in the described microprocessor.
3. pulse blood oxygen instrument according to claim 1, it is characterized in that, described automatic on/off unit comprises: detecting signal unit, this unit links to each other with Power Management Unit with the detectable signal input port of described microprocessor, described detecting signal unit is used to detect the detectable signal that described detectable signal input port obtains, and judges the signal characteristic when whether this detectable signal wave character has sensor side and have measured object; When the feature of described detectable signal does not have signal characteristic when having measured object in the sensor side, described detecting signal unit sends the control signal that is used to close described exploring block and display unit power supply to described Power Management Unit, makes described pulse blood oxygen instrument be in holding state; When the feature of described detectable signal has signal characteristic when having measured object in the sensor side, described detecting signal unit sends the control signal that is used to open described exploring block and display unit power supply to described Power Management Unit, makes described pulse blood oxygen instrument be in open state.
4. according to claim 2 or 3 described pulse blood oxygen instruments, it is characterized in that, described automatic on/off unit also comprises: driving governor, this driving governor links to each other with the luminous tube driver with described intervalometer, described driving governor is used to receive the activation signal of described intervalometer, and exports a default pumping signal to described luminous tube driver.
5. pulse blood oxygen instrument according to claim 4 is characterized in that, it is narrow pulse signal that described driving governor sends pumping signal.
6. according to claim 1,2 or 3 described pulse blood oxygen instruments, it is characterized in that described Power Management Unit comprises:
The supply of electrical energy module is used to provide electric energy;
Be used to control first switch control unit of exploring block supply of electrical energy, this units in series is between the electric energy input of the outfan of described supply of electrical energy module and described sensor unit and luminous tube driver; And
Be used to control the second switch control unit of display unit supply of electrical energy, this units in series is between the electric energy input of the outfan of described supply of electrical energy module and described pulse blood oxygen instrument display unit;
The control end of described first switch control unit and second switch control unit links to each other with described automatic on/off unit, is used for receiving from the unitary power control signal of described automatic on/off.
7. pulse blood oxygen instrument according to claim 6, it is characterized in that, described automatic on/off unit also comprises: power-supply controller of electric, this controller links to each other with described intervalometer, first switch control unit and second switch control unit respectively, be used to receive the activation signal that described intervalometer sends, and send the control signal of opening the exploring block power supply to described first switch control unit, perhaps, send power control signal to the described second switch control unit and first switch control unit according to the unitary detectable signal testing result of described automatic on/off.
8. pulse blood oxygen instrument according to claim 3 is characterized in that, described sensor unit is the optical frequency pick off, and the outfan of the signal of this pick off connects the detectable signal input port of described microprocessor; And,
Described detecting signal unit comprises: detectable signal waveform frequency comparing unit 232, this unit connects the detectable signal input port and the described Power Management Unit of described microprocessor, be used to receive described sensor unit detection signals fed back, and the waveform frequency of judgement present frame detectable signal and former frame detectable signal relation, send power control signal according to judged result to described Power Management Unit.
9. pulse blood oxygen instrument according to claim 3 is characterized in that, described sensor unit comprises: photoelectric sensor, filter circuit, amplifying circuit and A/D change-over circuit; Described photoelectric sensor, filter circuit, amplifying circuit and A/D change-over circuit are connected successively, and the outfan of described A/D change-over circuit connects the detectable signal input port of described microprocessor.
10. pulse blood oxygen instrument according to claim 9 is characterized in that, described detecting signal unit comprises:
Detectable signal wave-shape amplitude comparing unit, this unit connects the detectable signal input port and the described Power Management Unit of described microprocessor, be used to receive described sensor unit detection signals fed back, and the waveforms amplitude of judgement present frame detectable signal and former frame detectable signal relation, send power control signal according to judged result to described Power Management Unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200937423U CN201194798Y (en) | 2008-04-28 | 2008-04-28 | Pulse oximetry |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008200937423U CN201194798Y (en) | 2008-04-28 | 2008-04-28 | Pulse oximetry |
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| WO2012171470A1 (en) * | 2011-06-14 | 2012-12-20 | Pan Shuchang | Operating key-free pulse oximeter based on photoelectric effect |
| CN102961144A (en) * | 2011-08-16 | 2013-03-13 | 北京超思电子技术股份有限公司 | Pulse oximeter |
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| CN107773250A (en) * | 2017-11-22 | 2018-03-09 | 江苏康尚生物医疗科技有限公司 | A kind of photoelectric sphyg BOLD contrast quick dimming controlling method of automatic growth control |
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| WO2012171470A1 (en) * | 2011-06-14 | 2012-12-20 | Pan Shuchang | Operating key-free pulse oximeter based on photoelectric effect |
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