CN102940491B - Sleep and breath preliminary screening instrument with timing power-on function and power-saving method - Google Patents
Sleep and breath preliminary screening instrument with timing power-on function and power-saving method Download PDFInfo
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- CN102940491B CN102940491B CN201210477209.8A CN201210477209A CN102940491B CN 102940491 B CN102940491 B CN 102940491B CN 201210477209 A CN201210477209 A CN 201210477209A CN 102940491 B CN102940491 B CN 102940491B
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Abstract
The invention relates to a sleep and breath preliminary screening instrument with a timing power-on function and a power-saving method. The instrument comprises a casing wearing on the wrist, a display and control buttons are arranged on the casing, a nose airflow signal input interface and a blood oxygen signal input interface are arranged on the side wall of the casing respectively, and a control analysis circuit is fixed in the casing. According to the instrument, the timing power-on is achieved under a state that the circuit is completely out of power, cruising time of a battery is guaranteed, the power-on can be identified automatically, the effectiveness of the power-on state can be determined, and ordered carrying out of manual power-on and timing power-on can be achieved. The instrument is in a power-saving mode during storage, the working current is smaller than 30mA, the instrument can perform data storage as long as 20 hours, and the screen is in a blank screen state during the power-saving mode, so that the visual trouble caused by bright screen of the instrument during sleep of a patient can be avoided.
Description
Technical field
The invention belongs to medical Instrument field, relate in particular to a kind of sleep-respiratory primary dcreening operation instrument and power-saving working method with timing start-up function, sleep-respiratory test function and blood oxygen test function are attached to one by this primary dcreening operation instrument, and instrument can automatic recognition start-up state judges the effectiveness of timing start-up, accomplish the orderly execution of manually start and timing start-up.
Background technology
Along with the quickening of modern life rhythm and the change of life style, various sleep disordered illness day by day become an outstanding medical treatment and public health problem and obtain people's concern.According to the world sleep classification of diseases of publication in 2005, sleep disease external or that intrinsic factor cause reaches more than 90 plants, and wherein the most common person is as all very high in insomnia, the prevalence of sleep apnea syndrome in compatriots.Some rare Sleep Disorders are also familiar with gradually as narcolepsy etc.
Current sleep detection product is mainly PSG, and profile is larger, and external to lead continued proportion more, wears inconvenience, and operation more complicated is more suitable for serious symptom and breathes patient and use in hospital.But because the patient at initial stage is not ready, it is even unexpected that the hospital that goes go to check, wish very much to carry out primary dcreening operation at home, but this product must possess power saving, easy to operate, therefore, up to the present, also do not have aly to wear conveniently, simple to operate, be suitable for the sleep primary dcreening operation instrument that ordinary people wears at home and occur on market.
Summary of the invention
The object of the invention is a kind of sleep-respiratory primary dcreening operation instrument and the power-saving working method technical scheme with timing start-up function proposing for the problems referred to above, sleep-respiratory test function and blood oxygen test function are attached to one by this primary dcreening operation instrument, and instrument can automatic recognition start-up state judges the effectiveness of timing start-up, accomplish the orderly execution of manually start and timing start-up.
To achieve these goals, technical scheme of the present invention is:
There is the sleep-respiratory primary dcreening operation instrument of timing start-up function, comprise that one for being worn on the housing in wrist, housing is provided with display screen and controls button, in housing sidewall, be respectively arranged with nose airflow signal input interface and blood oxygen signal input interface, in housing, be fixed with control analysis circuit, described control analysis circuit comprises MCU central processing unit and battery supply, and the circuit that connects respectively setting around MCU central processing unit comprises nose air-flow test circuit, blood oxygen test circuit, display circuit, TF storage card circuit, power control circuit and USB card reading circuit; Wherein, described power control circuit comprises power-on circuit and the clock chip with interrupt output, described power-on circuit is provided with multiple control ends, described multiple control end comprises an electric power starting keyed end being connected with MCU central processing unit, a judgement end that takes a decision as to whether time opening being connected with MCU central processing unit, a time opening control end being connected with clock chip interrupt output, the data terminal of described clock chip connects MCU central processing unit, and described clock chip connects battery supply all the time.
Described battery supply provides power supply by power-on circuit for MCU central processing unit, nose air-flow test circuit, blood oxygen test circuit, display circuit, TF storage card circuit, USB card reading circuit, described battery supply is connected without breakpoint with clock chip, is always clock chip uninterrupted power source is provided.
Described power-on circuit comprises four dual input NAND gate circuits, key switch, the first field effect transistor and the second field effect transistor, described four dual input NAND gate circuits are respectively the first NAND gate, the second NAND gate, the 3rd NAND gate and the 4th NAND gate, described the first NAND gate output connects respectively the dual input of the 3rd NAND gate and an input of the 4th NAND gate, an input of described the first NAND gate is connected with the 4th NAND gate output, another input of described the first NAND gate is connected with the second NAND gate output, the dual input parallel connection of the second NAND gate is connected to power cathode by the first resistance, another input of described the 4th NAND gate is connected to battery supply negative pole by the second resistance, the output of described the 3rd NAND gate connects the first field effect transistor control grid, the positive pole of battery supply connects the first field effect transistor source electrode, the first field effect transistor drain electrode is power supply output, another input of described the 4th NAND gate is connected with MCU central processing unit as described electric power starting keyed end, the input of described key switch connects the positive pole of battery supply, the outfan of key switch connects the dual input of the second NAND gate, the dual input of described the second NAND gate connects a diode cathode simultaneously, between described the second field effect transistor drain electrode and battery supply negative pole, be connected two divider resistances, the positive pole of battery supply connects the second field effect transistor source electrode, the positive pole of described diode is connected in the middle of described two divider resistances, in the middle of described two divider resistances as described be whether that the judgement end of time opening is connected with MCU central processing unit, the control grid of described the second field effect transistor is connected with clock chip interrupt output as described time opening control end.
Infrared light driving and infrared signal receiving circuit that described blood oxygen test circuit comprises microprocessor and is attached thereto, described infrared signal receiving circuit is connected with described blood oxygen signal input interface, and described microprocessor is passed to MCU central processing unit by infrared signal after treatment by serial interface circuit.
Described nose air-flow test circuit nose pneumatic sensor adopts bridge-type baroceptor, described sensor balanced input termination has entered a constant-current source circuit, the outfan of sensor connects a differential amplifier circuit, the output of differential amplifier circuit connects filter amplification circuit, and the output of filter amplification circuit connects the A/D conversion input of MCU central processing unit.
The model of described bridge-type baroceptor is MPS-2107-006GRC, described constant-current source circuit includes an operational amplifier, the positive pole input of operational amplifier is connected between two divider resistances, the negative pole of operational amplifier connects loop resistance between being input in analog, and constant-current source circuit provides the continuous current of a 0.54mA for bridge-type baroceptor.
Sleep-respiratory primary dcreening operation instrument power-saving working method: the method is the method based on the above-mentioned sleep-respiratory primary dcreening operation instrument with timing start-up function, comprises start step and blank screen treatment step;
Described start step is:
A. switch on power by power control circuit;
B. electric power starting locking signal of central processing unit output keeps power connection to power control circuit;
C. central processing unit detects whether power control circuit is the judgement end of time opening, does is judgement manually to start shooting or timing start-up?
D. if manually start shooting, central processing unit enters normal mode of operation, enters Real-Time Monitoring interface;
E. if timing start-up, central processing unit enters storage interface, MCU central processing unit reads data running time of setting from intervalometer, start timing, when running time is after setup times, first central processing unit preserves case, and then one of central processing unit output is closed locking signal to power control circuit power cutoff;
Described blank screen treatment step is: carrying out after memory command 1 minute, without button operation, output blank screen signal is to display.
The beneficial effect that compared with the prior art the present invention produces is:
(1) timing start-up of the present invention is realized under the complete off-position of circuit, has guaranteed the cruise time of battery, and can automatic recognition start-up state judge the effectiveness of timing start-up, accomplishes manually to start shooting and the orderly execution of timing start-up.
(2) the present invention adopts large capacity I F card to realize multiple-case storage, and be more than 200 hour total memory time.Patient can preserve the case of different time sections, and distinguishes with acquisition time name respectively, is convenient to analyze relatively PD trend.
(3) the present invention adopts low power dissipation design, instrument enters battery saving mode in the time of storage, and operating current is less than 30mA, and instrument can reach the data storage of 20 hours, and battery saving mode sub-screen, in blank screen state, solves the vision puzzlement that patient comes due to instrument screen bright band in bed.
(4) the present invention can be uploaded to case fast computer upper computer analyzing software or directly be saved in computer by USB card-reading mode.Patient self does not need upper computer analyzing software just case history can be sent to the doctor in charge by network to diagnose, and accomplishes truly convenient.
Below in conjunction with accompanying drawing, embodiment is described in detail the present invention.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is control analysis electrical block diagram of the present invention;
Fig. 3 is power-on circuit schematic diagram of the present invention;
Fig. 4 is nose air-flow test circuit schematic diagram of the present invention.
The specific embodiment
Referring to Fig. 1, a kind of storage sleep-respiratory primary dcreening operation instrument with timing start-up function, comprise that one is worn on the housing 1 in wrist by bracelet 1-1, housing is provided with display screen 1-2 and controls button 1-3, in housing sidewall, be respectively arranged with nose airflow signal input interface 1-4 and blood oxygen signal input interface 1-5, in housing, be fixed with control analysis circuit; Referring to Fig. 2, described control analysis circuit comprises MCU central processing unit 2 and battery supply 3, and the circuit that connects respectively setting around MCU central processing unit comprises nose air-flow test circuit 4, blood oxygen test circuit 5, display circuit 6, TF storage card circuit 7, power control circuit 8 and the USB card reading circuit 10 that can be connected with host computer 9; Wherein, referring to Fig. 3, described power control circuit comprises power-on circuit and the clock chip 8-1 with interrupt output, described power-on circuit is provided with multiple control ends, described multiple control end comprises an electric power starting keyed end 8-2 who is connected with MCU central processing unit, judgement end 8-3 who takes a decision as to whether time opening who is connected with MCU central processing unit, the time opening control end 8-4 that is connected with clock chip interrupt output, the data terminal of described clock chip connects MCU central processing unit, and described clock chip connects battery supply all the time.
In embodiment, the model of described MCU central processing unit is MSP430F249TPM, and the model of described clock chip is ISL1208U8Z-TK.
After power-off, still can realize time switch completely in order to realize, described battery supply comprises main battery power supply 8-5 and auxiliary battery power supply 8-6, described main battery power supply is that described auxiliary battery power supply is to provide power supply for clock chip for MCU central processing unit, nose air-flow test circuit, blood oxygen test circuit, display circuit, TF storage card circuit, USB card reading circuit provide power supply.
Described in the present embodiment, battery supply is built-in lithium battery, described battery supply provides power supply by power-on circuit for MCU central processing unit, nose air-flow test circuit, blood oxygen test circuit, display circuit, TF storage card circuit, USB card reading circuit, described battery supply is connected without breakpoint with clock chip, be always clock chip uninterrupted power source is provided, the built-in lithium battery in embodiment is equivalent to main battery power supply and auxiliary battery power supply to be integrated.
In embodiment, described power-on circuit comprises four dual input NAND gate circuits, key switch 8-7, the first field effect transistor 8-8 and the second field effect transistor 8-9, described four dual input NAND gate circuits are respectively the first NAND gate 8-10, the second NAND gate 8-11, the 3rd NAND gate 8-12 and the 4th NAND gate 8-13, described the first NAND gate output connects respectively the dual input of the 3rd NAND gate and an input of the 4th NAND gate, an input of described the first NAND gate is connected with the 4th NAND gate output, another input of described the first NAND gate is connected with the second NAND gate output, the dual input parallel connection of the second NAND gate is connected to power cathode by the first resistance R 1, another input of described the 4th NAND gate is connected to battery supply negative pole by the second resistance R 2, the output of described the 3rd NAND gate connects the first field effect transistor control grid G, the positive pole of battery supply connects the first field effect transistor source S, the first field effect transistor drain D is power supply output, another input of described the 4th NAND gate is connected with MCU central processing unit as described electric power starting keyed end, the input of described key switch connects the positive pole of battery supply, the outfan of key switch connects the dual input of the second NAND gate, the dual input of described the second NAND gate connects a diode D1 negative pole simultaneously, between described the second field effect transistor drain D and battery supply negative pole, be connected two divider resistance R3 and R4, the positive pole of battery supply connects the second field effect transistor source S, the positive pole of described diode is connected in the middle of described two divider resistances, in the middle of described two divider resistances as described be whether that the judgement end of time opening is connected with MCU central processing unit, the control grid G of described the second field effect transistor is connected with clock chip interrupt output as described time opening control end.
In embodiment, in order to prevent phase mutual interference, be connected to and between diode D1 negative pole, be connected in series two diodes at the outfan of key switch, two diodes are respectively the second diode D2 and the 3rd diode D3, the negative pole of the second diode D2 connects the positive pole of the 3rd diode D3, the negative pole of the 3rd diode D3 connects diode D1 negative pole, the positive pole of the second diode D2 connects the output of key switch, and the positive pole of the negative pole of the second diode D2 and the 3rd diode D3 is connected battery supply negative pole by resistance R 5 simultaneously.
In embodiment, infrared light driving and infrared signal receiving circuit that described blood oxygen test circuit comprises microprocessor and is attached thereto; Wherein, infrared light drives and infrared signal receiving circuit is ripe common circuit, described described infrared signal receiving circuit is connected with described blood oxygen signal input interface, and described microprocessor is passed to MCU central processing unit by infrared signal after treatment by serial interface circuit.Blood oxygen test philosophy is to be foundation according to reduced hemoglobin, the absorption Spectrum characteristic of HbO2 Oxyhemoglobin in HONGGUANG and near infrared light region, uses Lambert Beer law to set up data empirical equation.The operation principle of this instrument is to adopt photoelectric blood oxygen detection technique to trace technology in conjunction with volume pulsation, press from both sides and refer to that formula sensor irradiates human body nail tip and obtains measuring-signal by light-sensitive element by perspective respectively with the HONGGUANG of two bundle different wave lengths and infrared light, the information of obtaining is sent to MCU central processing unit and carries out the reception of data after electronic circuit and microprocessor processes, and the microprocessor model in embodiment in blood oxygen test circuit is MSP430F1232IPOW.
Described nose air-flow test circuit nose pneumatic sensor adopts bridge-type baroceptor 401, described sensor balanced input termination has entered a constant-current source circuit, the outfan of sensor connects a differential amplifier circuit 402, the output of differential amplifier circuit connects filter amplification circuit 403, the output of filter amplification circuit connects the A/D conversion input of MCU central processing unit, wherein, the model of described bridge-type baroceptor is MPS-2107-006GRC, described constant-current source circuit includes an operational amplifier 404, the positive pole input of operational amplifier is connected between two divider resistance R6 and R7, the negative pole of operational amplifier takes back road resistance R 8 between being input in analog, constant-current source circuit provides the continuous current I of a 0.54mA for bridge-type baroceptor.Described operational amplifier adopts TLC2254 and the micro-power consumption amplifier of the low drift dual power supply of TLC2252 chip.This circuit structure aggregation of data sensor sensitive and amplify requirement, obtain best airflow signal.
Above-described embodiment structure can realize multiple-case memory function: adopt FAT32 file system, by preserving agreement, case history is stored, upper computer analyzing software, to preserve agreement to data decode, is analyzed.Present clock is read in each storage, and creates file with present clock name.
The present embodiment adopts the peculiar inner super low-power consumption of MSP430 single-chip microcomputer, lower frequency oscillator to design, and can enter battery saving mode when storage, under battery saving mode, can close liquid crystal display screen, mode by SPI is carried out storage operation, low in energy consumption under battery saving mode, and solve the vision puzzlement that patient comes due to instrument screen bright band in bed.
The present embodiment adopts USB card-reading mode to upload, and adopts TF card storage and Card Reader automatic switch-over circuit, and when storage, single-chip microcomputer and TF link and tap into the storage of row data, and when Card Reader, TF card automatically switches to Card Reader chip circuit, carries out exchanges data with PC.
Sleep-respiratory primary dcreening operation instrument power-saving working method embodiment, the method is the method for the sleep-respiratory primary dcreening operation instrument with timing start-up function based on described in embodiment 1, comprises start step and blank screen treatment step;
Described start step is:
A. switch on power by power control circuit;
Electric power starting locking signal of b.MCU central processing unit output keeps power connection to power control circuit;
Whether what c.MCU central processing unit detected power control circuit is the judgement end of time opening, does is judgement manually to start shooting or timing start-up?
D. if manually start shooting, MCU central processing unit enters normal mode of operation, and instrument enters Real-Time Monitoring interface;
E. if timing start-up, MCU central processing unit enters storage interface, MCU central processing unit reads data running time of setting from intervalometer, start timing, when running time is after setup times, first central processing unit carries out preservation case, and then power-off locking signal of MCU central processing unit output is to power control circuit power cutoff; Timing start-up and running time are the also time datas of input of function in the manually rear selection of start, in intervalometer now, store the timing start-up time data that deposits in after manual start and running time data, after timing start-up function setting, information is deposited in to single-chip microcomputer FLASH, and by timing start-up time write clock chip register.Once select timing start-up, be just defaulted as 8 hours running time (unless inputting separately running time), when MCU central processing unit after timing start-up is by one of Lookup protocol depositor running time, in depositor, automatically put into data running time of reading from intervalometer described running time, after timing start-up, MCU central processing unit intervalometer starts timing, and the data after timing are judged, running time, then MCU central processing unit was exported a power-off locking signal powered-down to preserving measurement data;
Described blank screen treatment step is: carrying out after memory command 1 minute, without button operation, output blank screen signal is to display.Memory command is divided into manually and is automatic, automatically in the time of timing start-up, just have, as step e, in the time carrying out memory command, illustrate that user has not needed Real Time Observation, for the power supply that avoids waste has or not when executing judgement after memory command the requirement that continues observation, after requiring without observation, automatically close demonstration and will effectively save battery; If there is observation requirement, can wake demonstration up by button.
The present embodiment instrument is made as manual start and two kinds of modes of timing start-up, and can automatically identify.Manually start is by power key control, in the time pressing power key, diode D2, D3 conducting, diode D1 is in cut-off state, now, CTR is high level, by NAND gate on-off circuit, metal-oxide-semiconductor 8-8 conducting, single-chip microcomputer is started working, by one-chip machine port KEY-HOLD output high level, latch open state, now one-chip machine port KEY-AUTO detects low level state, the system of judging is powered by manual start-up mode, single-chip microcomputer enters normal mode of operation, and instrument enters Real-Time Monitoring interface.
Timing start-up function is to utilize the timing alarm interrupt function of clock chip to realize, default available machine time and running time before timing start-up, in the time that the time arrives Preset Time, clock chip produces to report to the police and interrupts, clock chip IRQ port produces low level, now metal-oxide-semiconductor 8-9 conducting, diode D1 conducting, diode D2, D3 is in cut-off state, now, CTR is high level, by NAND gate on-off circuit, metal-oxide-semiconductor Q1 conducting, single-chip microcomputer is started working, by one-chip machine port KEY-HOLD output high level, latch open state, now one-chip machine port KEY-AUTO detects high level state, the system of judging is powered by timing start-up mode, after start, instrument can enter storage interface automatically, intervalometer starts timing, preserve case automatic shutdown when running time to instrument after setup times.
During as sleep-respiratory, not have in the situation of signal as example: the analogue signal of output is 0-3V, and after 12 AD change, scope of data is 0-4095.In the absence of signal, what nose air-flow collection single-chip microcomputer collected is the reference voltage of amplifier part, is 1. 25V left and right, and the desired result after AD conversion is (1.25/3) * 4095=1706 left and right.So in the situation that there is no nose airflow signal, the data of single-chip microcomputer collection remain on 0x6AA left and right.In like manner, in having nose airflow signal, result=(now voltage/3.0V full scale voltage) * 4095 of AD conversion, then single-chip microcomputer carries out computing to data, traces waveform on liquid crystal display screen.
Claims (6)
1. there is the sleep-respiratory primary dcreening operation instrument of timing start-up function, comprise that one for being worn on the housing in wrist, housing is provided with display screen and controls button, in housing sidewall, be respectively arranged with nose airflow signal input interface and blood oxygen signal input interface, in housing, be fixed with control analysis circuit, described control analysis circuit comprises MCU central processing unit and battery supply, and the circuit that connects respectively setting around MCU central processing unit comprises nose air-flow test circuit, blood oxygen test circuit, display circuit, TF storage card circuit, power control circuit and USB card reading circuit, it is characterized in that, described power control circuit comprises power-on circuit and the clock chip with interrupt output, described power-on circuit is provided with multiple control ends, described multiple control end comprises an electric power starting keyed end being connected with MCU central processing unit, a judgement end that takes a decision as to whether time opening being connected with MCU central processing unit, a time opening control end being connected with clock chip interrupt output, the data terminal of described clock chip connects MCU central processing unit, described clock chip connects battery supply all the time, described battery supply comprises main battery power supply and auxiliary battery power supply, described main battery power supply is to be MCU central processing unit, nose air-flow test circuit, blood oxygen test circuit, display circuit, TF storage card circuit, USB card reading circuit provides power supply, described auxiliary battery power supply is to provide power supply for clock chip.
2. the sleep-respiratory primary dcreening operation instrument with timing start-up function according to claim 1, it is characterized in that, described power-on circuit comprises four dual input NAND gate circuits, key switch, the first field effect transistor and the second field effect transistor, described four dual input NAND gate circuits are respectively the first NAND gate, the second NAND gate, the 3rd NAND gate and the 4th NAND gate, described the first NAND gate output connects respectively the dual input of the 3rd NAND gate and an input of the 4th NAND gate, an input of described the first NAND gate is connected with the 4th NAND gate output, another input of described the first NAND gate is connected with the second NAND gate output, the dual input parallel connection of the second NAND gate is connected to power cathode by the first resistance, another input of described the 4th NAND gate is connected to battery supply negative pole by the second resistance, the output of described the 3rd NAND gate connects the first field effect transistor control grid, the positive pole of battery supply connects the first field effect transistor source electrode, the first field effect transistor drain electrode is power supply output, another input of described the 4th NAND gate is connected with MCU central processing unit as described electric power starting keyed end, the input of described key switch connects the positive pole of battery supply, the outfan of key switch connects the dual input of the second NAND gate, the dual input of described the second NAND gate connects a diode cathode simultaneously, between described the second field effect transistor drain electrode and battery supply negative pole, be connected two divider resistances, the positive pole of battery supply connects the second field effect transistor source electrode, the positive pole of described diode is connected in the middle of described two divider resistances, in the middle of described two divider resistances as described be whether that the judgement end of time opening is connected with MCU central processing unit, the control grid of described the second field effect transistor is connected with clock chip interrupt output as described time opening control end.
3. the sleep-respiratory primary dcreening operation instrument with timing start-up function according to claim 1, it is characterized in that, infrared light driving and infrared signal receiving circuit that described blood oxygen test circuit comprises microprocessor and is attached thereto, described infrared signal receiving circuit is connected with described blood oxygen signal input interface, and described microprocessor is passed to MCU central processing unit by infrared signal after treatment by serial interface circuit.
4. the sleep-respiratory primary dcreening operation instrument with timing start-up function according to claim 1, it is characterized in that, described nose air-flow test circuit nose pneumatic sensor adopts bridge-type baroceptor, described sensor balanced input termination has entered a constant-current source circuit, the outfan of sensor connects a differential amplifier circuit, the output of differential amplifier circuit connects filter amplification circuit, and the output of filter amplification circuit connects the A/D conversion input of MCU central processing unit.
5. the sleep-respiratory primary dcreening operation instrument with timing start-up function according to claim 4, it is characterized in that, the model of described bridge-type baroceptor is MPS-2107-006GRC, described constant-current source circuit includes an operational amplifier, the positive pole input of operational amplifier is connected between two divider resistances, the negative pole of operational amplifier connects loop resistance between being input in analog, and constant-current source circuit provides the continuous current of a 0.54mA for bridge-type baroceptor.
6. sleep-respiratory primary dcreening operation instrument power-saving working method: the method is the method for sleep-respiratory primary dcreening operation instrument based on having timing start-up function described in claim 1, comprises start step and blank screen treatment step;
Described start step is:
A. switch on power by power control circuit;
B. electric power starting locking signal of central processing unit output keeps power connection to power control circuit;
C. central processing unit detects whether power control circuit is the judgement end of time opening, does is judgement manually to start shooting or timing start-up?
D. if manually start shooting, central processing unit enters normal mode of operation, enters Real-Time Monitoring interface;
E. if timing start-up, central processing unit enters storage interface, MCU central processing unit reads data running time of setting from intervalometer, start timing, when running time is after setup times, first central processing unit preserves case, and then one of central processing unit output is closed locking signal to power control circuit power cutoff;
Described blank screen treatment step is: carrying out after memory command 1 minute, without button operation, output blank screen signal is to display.
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Address after: Qin 066004 West Street in Hebei province Qinhuangdao City Economic and Technological Development Zone No. 112 Patentee after: Kangtai medical system (Qinhuangdao) Limited by Share Ltd Address before: Qin 066004 West Street in Hebei province Qinhuangdao City Economic and Technological Development Zone No. 112 Patentee before: Qinhuangdao Contec Medical Systems Co.,Ltd. |