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WO2022087875A1 - 应用双色发光二极管进行电源指示的电路、方法和血氧仪 - Google Patents

应用双色发光二极管进行电源指示的电路、方法和血氧仪 Download PDF

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Publication number
WO2022087875A1
WO2022087875A1 PCT/CN2020/124295 CN2020124295W WO2022087875A1 WO 2022087875 A1 WO2022087875 A1 WO 2022087875A1 CN 2020124295 W CN2020124295 W CN 2020124295W WO 2022087875 A1 WO2022087875 A1 WO 2022087875A1
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WO
WIPO (PCT)
Prior art keywords
module
color
emitting diode
light
mcu module
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Application number
PCT/CN2020/124295
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English (en)
French (fr)
Inventor
舒畅
Original Assignee
广东健奥科技有限公司
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Filing date
Publication date
Application filed by 广东健奥科技有限公司 filed Critical 广东健奥科技有限公司
Priority to JP2023515014A priority Critical patent/JP7575137B2/ja
Priority to PCT/CN2020/124295 priority patent/WO2022087875A1/zh
Publication of WO2022087875A1 publication Critical patent/WO2022087875A1/zh
Priority to ZA2023/03787A priority patent/ZA202303787B/en
Priority to US18/140,820 priority patent/US20240146084A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H02J7/0049—Detection of fully charged condition
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A61B5/14552—Details of sensors specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6825—Hand
    • A61B5/6826—Finger
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/683—Means for maintaining contact with the body
    • A61B5/6838—Clamps or clips
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the invention relates to a circuit, a method and an oximeter for power indication by using a two-color light-emitting diode.
  • the existing finger clip pulse oximeters are mainly powered by AAA7 batteries, and do not support other methods such as lithium batteries, and the amount of power is represented by an energy column.
  • the LCD screen When the battery is at a low voltage, the LCD screen usually flashes. Or the prompt that the energy column has no electricity.
  • the LCD screen of the finger-clip pulse oximeter generally adopts a display screen of about 1 inch, the display icons for the energy column are relatively small, and the use of the finger-clip pulse oximeter is different from using a mobile phone.
  • the low-voltage alarm is displayed by the flashing of the LCD screen, which is easy to cause trouble for users and interferes with viewing the test data.
  • the online charging function is not supported, and the device may be unusable because the battery is not replaced in time, especially if there is no spare battery at home, it may also increase the psychological pressure when using the product.
  • the first object of the present invention is to provide a circuit for power indication by using two-color light-emitting diodes, through which the user can more intuitively know the power supply of the finger-clip pulse oximeter.
  • the second object of the present invention is to provide a method for indicating the power supply by using the above circuit, so that the user can know the power supply condition of the finger-clip pulse oximeter more intuitively.
  • the third object of the present invention is to provide an oximeter that uses two-color light-emitting diodes for power indication, so that the user can know the power supply situation more intuitively.
  • a circuit for power indication using a two-color light-emitting diode the circuit is applied to a finger-pressure pulse oximeter, comprising:
  • a two-color light-emitting diode module includes a two-color light-emitting diode D1, and the two-color light-emitting diode module is connected to the MCU module U1;
  • a voltage detection module connected to the MCU module U1;
  • a power input module adapted to be connected to an external power supply, the power input module is connected to the MCU module U1 and the rechargeable battery module;
  • the MCU module U1 is adapted to control the two-color light-emitting diode D1 according to the state of the power input module and the rechargeable battery module, so that the acupressure pulse oximeter can be directly observed by the human eye. Visual effect.
  • the power input module includes a socket U2, a fuse F2 is connected between the output end of the power input module and the socket U2, the output end of the power input module is connected with the rechargeable battery module, and the The output end of the power input module is connected to the MCU module U1 by inserting the detection module.
  • the insertion detection module includes a resistor R1, one end of the resistor R1 is connected to the MCU module U1, and the other end is connected to the output end of the power input module.
  • the rechargeable battery module includes a charge management chip U3 and a lithium battery BAT1, the charge management chip U3 is connected to the output end of the power input module, the negative electrode of the lithium battery BAT1 is grounded, and the positive electrode is connected to the charge management chip.
  • the chip U3 is connected, and the positive electrode of the lithium battery BAT1 is connected to the MCU module U1 through the voltage detection module.
  • the voltage detection module includes a resistor R7 and a resistor R8, one end of the resistor R7 is connected to the positive electrode of the lithium battery BAT1, one end of the resistor R8 is grounded, and the other end of the resistor R8 is connected to the resistor.
  • the other end of R7 is connected to the MCU module U1 after being connected.
  • the two-color light-emitting diode D1 includes a first light-emitting diode capable of exhibiting a first color and a second light-emitting diode capable of exhibiting a second color, wherein the first color is different from the second color; the two-color light-emitting diode
  • the diode module further includes a resistor R4 and a resistor R5, the anode of the first light-emitting diode is connected to the VDD pin of the MCU module U1 through the resistor R4, and the anode of the second light-emitting diode is connected to the other through the resistor R5.
  • the same VDD pin of the MCU module U1 is connected; the cathode of the first light-emitting diode is directly connected to an I/O pin of the MCU module U1, and the cathode of the second light-emitting diode is directly connected to the MCU module The other I/O pin of U1 is connected.
  • the visual effects presented by the oximeter that can be directly observed by the human eye include:
  • the MCU module U1 controls the first light-emitting diode to flash with the first color at a predetermined frequency
  • the MCU module U1 controls the first light-emitting diode so that it is always on in the first color.
  • the MCU module U1 When the power input module is not connected to the external power supply, and the MCU module U1 detects that the voltage of the detection terminal of the voltage detection module is lower than the first predetermined voltage, the MCU module U1 controls the second lighting a diode so that it is always on in said second color;
  • the MCU module U1 When the power input module is not connected to the external power supply, and the MCU module U1 detects that the voltage of the detection terminal of the voltage detection module is lower than a second predetermined voltage, the MCU module U1 controls the second lighting a diode to flash with the second color according to a predetermined frequency;
  • the second predetermined voltage is lower than the first predetermined voltage.
  • the charging management chip has a VIN pin connected to the power input module, a BAT pin connected to the lithium battery BAT1 for charging current output, and a CHG pin for charging state output, the The CHG pin is connected to the indicator light-emitting diode D2, and the indicator light-emitting diode D2 can display a third color.
  • the MCU module U1 controls the first light-emitting diode of the two-color light-emitting diode D1 to flash with the first color at a predetermined frequency;
  • the MCU module U1 controls the first LED of the two-color LED D1 to keep the first color on.
  • the MCU module U1 When the power input module is not connected to the external power supply, and the MCU module U1 detects that the voltage of the detection terminal of the voltage detection module is lower than the first predetermined voltage, the MCU module U1 controls the second LED of the two-color LED D1 so that the second LED is The color is always bright;
  • the MCU module U1 When the power input module is not connected to the external power supply, and the MCU module U1 detects that the voltage of the detection terminal of the voltage detection module is lower than the second predetermined voltage, the MCU module U1 controls the second LED of the two-color LED D1 to make it follow the predetermined frequency Blink with the second color;
  • the second predetermined voltage is lower than the first predetermined voltage.
  • An oximeter using two-color light-emitting diodes for power indication is a finger-clip pulse oximeter
  • the oximeter includes a body and the above-mentioned circuit
  • the surface of the body has a display screen and a The indicated position on one side of the display screen
  • the two-color light-emitting diode D1 is set corresponding to the indicated position.
  • the beneficial effects of the present invention are as follows: for a device with a relatively small display screen such as a finger-clip pulse oximeter, by setting a two-color light-emitting diode, the two-color light-emitting diode can emit two colors of light, and can be input according to the power input module and the rechargeable battery.
  • the module controls the light of different colors, so that the acupressure pulse oximeter presents a visual effect that can be directly observed by the human eye, so as to apply the intuitiveness of the light-emitting diode light-emitting display, so that the user can visually check the battery level. It eliminates the psychological pressure of users who are concerned that the battery is out of power and cannot use the device.
  • FIG. 1 is a schematic structural diagram of a finger-clip pulse oximeter according to an embodiment of the present invention
  • FIG. 2 is a block diagram of a circuit structure of a finger-clip pulse oximeter according to an embodiment of the present invention
  • FIG. 3 is a circuit structure diagram of an MCU module according to an embodiment of the present invention.
  • FIG. 4 is a circuit structure diagram of a power detection module according to an embodiment of the present invention.
  • FIG. 5 is a circuit structure diagram of a rechargeable battery module according to an embodiment of the present invention.
  • FIG. 6 is a circuit structure diagram of a power input module according to an embodiment of the present invention.
  • FIG. 7 is a circuit structure diagram of an insertion detection module according to an embodiment of the present invention.
  • FIG. 8 is a circuit structure diagram of a two-color LED module according to an embodiment of the present invention.
  • An embodiment of the present invention provides an oximeter using a two-color light-emitting diode for power indication, wherein the oximeter is a finger-clip pulse oximeter.
  • the oximeter includes a main body 4 and a circuit provided in the main body 4 , and the circuit includes a rechargeable lithium battery.
  • the surface of the main body 4 has a display screen 3 , one side of the display screen 3 is provided with a light touch button 2 and two indication positions arranged at intervals, and indicator lights 1 and 5 are provided at the indication positions.
  • One of the indicator lights 5 is a two-color light-emitting diode, which is used for power supply indication, and the other indicator light 1 is used for the indication of other states.
  • the other side of the display screen is also provided with a socket 6 suitable for charging access.
  • the socket 6 is a USB socket, which is connected to an external power source through a charging cable for charging the lithium battery.
  • the circuit uses two-color light-emitting diodes for power indication.
  • the circuit includes an MCU module, a two-color light-emitting diode module connected to the MCU module, a voltage detection module connected to the MCU module, a rechargeable battery module connected to the voltage detection module, a module suitable for connecting with an external power supply and connected to the MCU module And the power input module to which the rechargeable battery module is connected.
  • the MCU module is a micro-control unit module, and any suitable MCU can be used in the present invention, for example, the model of the MCU can be STM32L071CB.
  • the pin structure and circuit connection relationship of the MCU module U1 are shown in FIG. 3 .
  • the dual-color LED module includes a dual-color LED D1 , a resistor R4 and a resistor R5 .
  • the two-color light-emitting diode D1 includes a first light-emitting diode capable of exhibiting a first color and a second light-emitting diode capable of exhibiting a second color, wherein the first color is different from the second color.
  • the first color and the second color can be any different colors. For example, in one embodiment, the first color is blue and the second color is orange.
  • the anode of the first light-emitting diode is connected to the MCU module U1 through the resistor R4, and the anode of the second light-emitting diode is connected to the MCU module U1 through the resistor R5.
  • the resistance values of the resistor R4 and the resistor R5 are both 1k ⁇ .
  • the cathode of the first light-emitting diode is directly connected to one I/O pin P52 of the MCU module U1
  • the cathode of the second light-emitting diode is directly connected to another I/O pin P49 of the MCU module U1.
  • the MCU module is suitable for controlling the two-color light-emitting diode according to the state of the power input module and the rechargeable battery module, so that the acupressure pulse oximeter presents a visual effect that can be directly observed by the human eye.
  • the rechargeable battery module includes a charge management chip U3 and a lithium battery BAT1
  • the charge management chip U3 is connected to the output terminal +5V_USB of the power input module
  • the negative electrode of the lithium battery BAT1 is grounded
  • the positive electrode +VBAT is connected to the charge management chip U3
  • the positive electrode +VBAT of the lithium battery BAT1 is connected to the pin P15 of the MCU module U1 through the voltage detection module.
  • the charge management chip can be any suitable model, for example, the model can be SD4054.
  • the charging management chip U3 has a VIN pin connected to the power input module, a BAT pin connected to the lithium battery BAT1 for charging current output, and a PRG for charging current setting, charging current monitoring and shutdown pin, GND pin for ground, CHG pin for charge status output.
  • the CHG pin is connected with the indicating light-emitting diode D2, and the indicating light-emitting diode D2 can display the third color.
  • the third color may be different from both the first color and the second color, eg the third color may be yellow.
  • the indicator light-emitting diode D2 is used to detect the working state of the charge management chip. In some embodiments, as shown in FIG.
  • the indicating light-emitting diode D2 may be set corresponding to another indicating position of the main body 4 , that is, one indicator light 5 on the surface of the main body 4 is a two-color light-emitting diode D1 , and the other indicator light 1 In order to indicate the light-emitting diode D2. In this way, whether the charging management chip U3 is working normally can be judged by directly observing the indicating light-emitting diode D2 with the human eye.
  • the voltage detection module includes a resistor R7 and a resistor R8.
  • One end of the resistor R7 is connected to the positive electrode +VBAT of the lithium battery BAT1, one end of the resistor R8 is grounded, and the other end of the resistor R8 is connected to the other end of the resistor R7.
  • the detection terminal LV_ADC is connected to the pin P15 of the MCU module U1.
  • the resistance value of R7 is 1.2M ⁇
  • the resistance value of R8 is 200K ⁇ .
  • the function of the voltage detection module is to divide the voltage, that is, to divide the voltage through the resistor R7 and the resistor R8, so as to avoid the direct detection of the voltage of the positive electrode of the lithium battery BAT1 + VBAT, and prevent the voltage of the positive electrode of the lithium battery BAT1 + VBAT from being too large and unfavorable for detection.
  • the power input module includes a socket U2.
  • the socket U2 is a USB socket
  • the external power source is a charging adapter
  • the socket U2 can be connected to the charging adapter through a charging cable.
  • the socket U2 corresponds to the socket 6 provided on the main body 4 .
  • a fuse F2 is connected between the output terminal +5V_USB of the power input module and the socket U2.
  • fuse F2 has a voltage rating of 5V and a current rating of 1A.
  • the output terminal +5V_USB of the power input module is connected to the VIN pin of the rechargeable battery module through a resistor R2.
  • the resistance value of R2 is 3.9 ⁇ .
  • the output terminal +5V_USB of the power input module is directly connected to the pin VDD50-I of the MCU module U1 to supply power to the MCU module U1.
  • the output terminal +5V_USB of the power input module is also connected to the pin P46 of the MCU module U1 by inserting the detection module, so that the MCU module U1 can detect whether the power input module is connected to an external power supply.
  • the power input module also includes a capacitor C1 and a capacitor C2. One end of the capacitor C1 is grounded, and the other end is connected to the output terminal +5V_USB. One end of the capacitor C2 is grounded, and the other end is connected to the output terminal +5V_USB. That is, capacitors C1 and C2 are connected in parallel.
  • the parameter of the capacitor C1 is 100 nF
  • the parameter of the capacitor C2 is 10 ⁇ F.
  • the insertion detection module includes a resistor R1, one end of the resistor R1 USB-DT is connected to the P46 pin of the MCU module U1, and the other end +5V_USB is connected to the output end +5V_USB of the power input module.
  • the resistor R1 is a pull-up current-limiting resistor, and its function is to provide an input high-level signal to the IO of the MCU module U1 through the resistor R1 by +5V_USB, so that the MCU module U1 can accurately detect the 5V high-level.
  • the present invention provides the following power indication method, so that the acupressure pulse oximeter presents a visual effect that can be directly observed by the human eye, so that the user can more intuitively understand the power supply of the acupressure pulse oximeter state.
  • the power indication method includes:
  • the charging power reaches the network +5V_USB through the fuse F2, and the +5V_USB power enters the MCU module U1 through the network USB-DT through the resistor R1, and the pin P46 of the MCU module U1 It will automatically detect that there is a 5V high level, and it is considered that there is an external charging power supply connected at this time.
  • the MCU module U1 If the pin P15 of the MCU module U1 detects that the lithium battery BAT1 is in a charging state through the detection of the detection terminal LV_ADC, then the MCU module U1 will send a pulse control signal of a certain frequency through the pin P52, so that the first light-emitting diode is in accordance with the predetermined frequency.
  • the frequency flashes in a first color (eg blue).
  • the MCU module U1 If the pin P15 of the MCU module U1 detects that the lithium battery BAT1 is fully charged through the detection of the detection terminal LV_ADC when the external power supply is connected, then the MCU module U1 will send a low level signal through the pin P52.
  • the first light-emitting diode is directly lit so that it is always on in the first color (eg, blue).
  • the pin P15 of the MCU module U1 will automatically detect the level of the network LV_ADC.
  • the LV_ADC is at the level determined by the program control algorithm In the low voltage state, that is, when the voltage of the detection terminal LV_ADC of the voltage detection module is lower than the first predetermined voltage, it means that the power of the lithium battery BAT1 begins to be insufficient.
  • the MCU module U1 will send a low level signal through pin P49 to directly
  • the second light-emitting diode is lit so that it is always on in a second color (eg, orange), thereby prompting the user to charge as soon as possible.
  • the MCU module U1 will send a pulse control signal of a certain frequency through pin P49, so that the second light-emitting diode flashes with a second color (such as orange) according to the predetermined frequency, thereby prompting the user:
  • the device It will automatically shut down, please charge it immediately.

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Abstract

一种应用双色发光二极管进行电源指示的电路、方法和血氧仪，其中电路应用于指夹式脉搏血氧仪，其包括：MCU模块U1；双色发光二极管D1，与MCU模块U1连接；电压检测模块，与MCU模块U1连接；充电电池模块，与电压检测模块连接；和电源输入模块，适于与外部电源连接，电源输入模块与MCU模块U1以及充电电池模块连接；其中，MCU模块U1适于根据电源输入模块和充电电池模块的状态，对双色发光二极管D1进行控制，使指夹式脉搏血氧仪呈现可供人眼直接观察的视觉效果。针对指夹式脉搏血氧仪这种显示屏比较小的设备，通过设置双色发光二极管，使用户可以更加直观地知道指夹式脉搏血氧仪的电源情况。

Description

应用双色发光二极管进行电源指示的电路、方法和血氧仪 技术领域
本发明涉及应用双色发光二极管进行电源指示的电路、方法和血氧仪。
背景技术
现有的指夹式脉搏血氧仪，主要都采用AAA7号电池供电，不支持锂电池等其他方式供电，而且电量的多少采用能量柱来表示，当电池处于低电压时，通常采用液晶屏闪烁或能量柱无电的提示。
然而，由于指夹式脉搏血氧仪的液晶屏一般采用1寸左右的显示屏，所以针对能量柱的显示图标都比较小，而且使用指夹式脉搏血氧仪设备与使用手机不一样，用户一般不会强烈关注电池的使用状况，除非有更直观的观察方式，否则往往只能等电池彻底无电或者无法开机了，才能够知道无电。
因此，现有的指夹式脉搏血氧仪具有以下不足：
(1)通过液晶屏闪烁来展示低压报警，容易造成用户使用麻烦，给查看测试数据带来干扰。
(2)能量柱虽然可以展示电池容量的多少，但是往往用户在使用设备时，经常容易疏忽此处的显示，导致设备自动关机时，才知道电池无电。
(3)不支持在线充电功能，有可能因为没有及时更换电池，而导致设备无法使用，特别是在家没有备用电池的情况下，还可能还会增加使用产品时的心理压力。
发明内容
本发明的第一目的是提供一种应用双色发光二极管进行电源指示的电路，可以通过双色发光二极管，使用户可以更加直观地知道指夹式脉搏血氧仪的电源情况。
本发明的第二目的是提供一种应用上述电路进行电源指示的方法，使用户可以更加直观地知道指夹式脉搏血氧仪的电源情况。
本发明的第三目的是提供一种应用双色发光二极管进行电源指示的血氧仪，使用户可以更加直观地知道其电源情况。
针对上述的第一目的，本发明采用以下技术方案：
一种应用双色发光二极管进行电源指示的电路，所述电路应用于指压式脉搏血氧仪，包 括：
MCU模块U1；
双色发光二极管模块，包括双色发光二极管D1，所述双色发光二极管模块与所述MCU模块U1连接；
电压检测模块，与所述MCU模块U1连接；
充电电池模块，与所述电压检测模块连接；和
电源输入模块，适于与外部电源连接，所述电源输入模块与所述MCU模块U1以及所述充电电池模块连接；
其中，所述MCU模块U1适于根据所述电源输入模块和所述充电电池模块的状态，对所述双色发光二极管D1进行控制，使指压式脉搏血氧仪呈现可供人眼直接观察的视觉效果。
进一步地，所述电源输入模块包括插座U2，所述电源输入模块的输出端和所述插座U2之间连接有保险丝F2，所述电源输入模块的输出端与所述充电电池模块连接，且所述电源输入模块的输出端通过插入检测模块与所述MCU模块U1连接。
进一步地，所述插入检测模块包括电阻R1，所述电阻R1的一端连接至所述MCU模块U1，另一端连接至所述电源输入模块的输出端。
进一步地，所述充电电池模块包括充电管理芯片U3和锂电池BAT1，所述充电管理芯片U3与所述电源输入模块的输出端连接，所述锂电池BAT1的负极接地，正极与所述充电管理芯片U3连接，且所述锂电池BAT1的正极通过所述电压检测模块与所述MCU模块U1连接。
进一步地，所述电压检测模块包括电阻R7和电阻R8，所述电阻R7的一端与所述锂电池BAT1的正极连接，所述电阻R8的一端接地，所述电阻R8的另一端与所述电阻R7的另一端连接后与所述MCU模块U1连接。
进一步地，所述双色发光二极管D1包括可呈现第一颜色的第一发光二极管和可呈现第二颜色的第二发光二极管，其中所述第一颜色与所述第二颜色不同；所述双色发光二极管模块还包括电阻R4和电阻R5，所述第一发光二极管的阳极通过所述电阻R4与所述MCU模块U1的VDD引脚连接，所述第二发光二极管的阳极通过所述电阻R5与所述MCU模块U1的同一个VDD引脚连接；所述第一发光二极管的阴极直接与所述MCU模块U1的一个I/O引脚连接，所述第二发光二极管的阴极直接与所述MCU模块U1的另一个I/O引脚连接。
进一步地，所述血氧仪呈现可供人眼直接观察的视觉效果包括：
当所述电源输入模块与所述外部电源连接且所述锂电池BAT1处于充电状态时，所述MCU模块U1控制所述第一发光二极管，使其按照预定频率以所述第一颜色进行闪烁；
当所述电源输入模块与所述外部电源连接且所述锂电池BAT1处于电满状态时，所述 MCU模块U1控制所述第一发光二极管，使其以所述第一颜色常亮。
当所述电源输入模块不与所述外部电源连接，且所述MCU模块U1检测到所述电压检测模块的检测端的电压低于第一预定电压时，所述MCU模块U1控制所述第二发光二极管，使其以所述第二颜色常亮；
当所述电源输入模块不与所述外部电源连接，且所述MCU模块U1检测到所述电压检测模块的检测端的电压低于第二预定电压时，所述MCU模块U1控制所述第二发光二极管，使其按照预定频率以所述第二颜色进行闪烁；
所述第二预定电压低于所述第一预定电压。
进一步地，所述充电管理芯片具有与所述电源输入模块连接的VIN引脚、与所述锂电池BAT1连接用于充电电流输出的BAT引脚以及用于充电状态输出的CHG引脚，所述CHG引脚与指示发光二极管D2连接，所述指示发光二极管D2可显示第三颜色。
针对上述的第二目的，本发明采用以下技术方案：
当电源输入模块与外部电源连接且充电电池模块的锂电池BAT1处于充电状态时，MCU模块U1控制双色发光二极管D1的第一发光二极管，使其按照预定频率以第一颜色进行闪烁；
当电源输入模块与外部电源连接且充电电池模块的锂电池BAT1处于电满状态时，MCU模块U1控制双色发光二极管D1的第一发光二极管，使其以第一颜色常亮。
当电源输入模块不与外部电源连接，且MCU模块U1检测到电压检测模块的检测端的电压低于第一预定电压时，MCU模块U1控制双色发光二极管D1的第二发光二极管，使其以第二颜色常亮；
当电源输入模块不与外部电源连接，且MCU模块U1检测到电压检测模块的检测端的电压低于第二预定电压时，MCU模块U1控制双色发光二极管D1的第二发光二极管，使其按照预定频率以第二颜色进行闪烁；
其中，所述第二预定电压低于所述第一预定电压。
针对上述的第三目的，本发明采用以下技术方案：
一种应用双色发光二极管进行电源指示的血氧仪，所述血氧仪为指夹式脉搏血氧仪，所述血氧仪包括本体和上述电路，所述本体的表面具有显示屏和位于所述显示屏一侧的指示位置，双色发光二极管D1对应所述指示位置进行设置。
本发明的有益效果：针对指夹式脉搏血氧仪这种显示屏比较小的设备，通过设置双色发光二极管，使双色发光二极管能够发出两种颜色的光，并可以根据电源输入模块和充电电池模块对不同颜色的光进行控制，使指压式脉搏血氧仪呈现可供人眼直接观察的视觉效果，从而应用发光二极管发光显示的直观性，让用户可以通过视觉的方式来查看电池的电量状况， 消除用户担心电池没有电而无法使用设备的心理压力。
附图说明
图1为本发明一实施例的指夹式脉搏血氧仪的结构示意图；
图2为本发明一实施例的指夹式脉搏血氧仪的电路结构框图；
图3为本发明一实施例的MCU模块的电路结构图；
图4为本发明一实施例的电源检测模块的电路结构图；
图5为本发明一实施例的充电电池模块的电路结构图；
图6为本发明一实施例的电源输入模块的电路结构图；
图7为本发明一实施例的插入检测模块的电路结构图；
图8为本发明一实施例的双色发光二极管模块的电路结构图。
具体实施方式
为便于更好地理解本发明的目的、结构、特征以及功效等，现结合附图和具体实施方式对本发明作进一步说明。
本发明一实施例提供一种应用双色发光二极管进行电源指示的血氧仪，其中血氧仪为指夹式脉搏血氧仪。
如图1所示，血氧仪包括本体4和设于本体4的电路，电路包括可充电的锂电池。本体4的表面具有显示屏3，显示屏3的一侧设有轻触按键2和两个间隔设置的指示位置，指示位置设置有指示灯1，5。其中一个指示灯5为双色发光二极管，用于进行电源指示，另一个指示灯1则用于其他状态的指示。显示屏的另一侧还设有适于充电接入的插座6，在一个实施例中，插座6为USB插座，通过充电连接线与外部电源连接，用于对锂电池充电。
其中电路应用双色发光二极管进行电源指示。如图2所示，电路包括MCU模块、与MCU模块连接的双色发光二极管模块、与MCU模块连接的电压检测模块、与电压检测模块连接的充电电池模块、适于与外部电源连接且与MCU模块以及充电电池模块连接的电源输入模块。
MCU模块即微控制单元模块，任何合适的MCU都可以用于本发明，例如MCU的型号可以是STM32L071CB。在一个实施例中，MCU模块U1的引脚结构和电路连接关系如图3所示。
如图8所示，双色发光二极管模块包括双色发光二极管D1、电阻R4和电阻R5。双色发光二极管D1包括可呈现第一颜色的第一发光二极管和可呈现第二颜色的第二发光二极管， 其中第一颜色与第二颜色不同。第一颜色和第二颜色可以是任意的不同的颜色。例如，在一个实施例中，第一颜色为蓝色，第二颜色为橙色。第一发光二极管的阳极通过电阻R4与MCU模块U1连接，第二发光二极管的阳极通过电阻R5与MCU模块U1连接。在一个实施例中，电阻R4和电阻R5的阻值都是1kΩ。第一发光二极管的阴极直接与MCU模块U1的一个I/O引脚P52连接，第二发光二极管的阴极直接与MCU模块U1的另一个I/O引脚P49连接。
MCU模块适于根据电源输入模块和充电电池模块的状态，对双色发光二极管进行控制，使指压式脉搏血氧仪呈现可供人眼直接观察的视觉效果。
如图5所示，充电电池模块包括充电管理芯片U3和锂电池BAT1，充电管理芯片U3与电源输入模块的输出端+5V_USB连接，锂电池BAT1的负极接地，正极+VBAT与充电管理芯片U3连接，且锂电池BAT1的正极+VBAT通过电压检测模块与MCU模块U1的引脚P15连接。充电管理芯片可以是任意合适的型号，例如型号可以是SD4054。在一个实施例中，充电管理芯片U3具有与电源输入模块连接的VIN引脚、与锂电池BAT1连接用于充电电流输出的BAT引脚、用于充电电流设定、充电电流监控和停机的PRG引脚、用于接地的GND引脚、用于充电状态输出的CHG引脚。其中，CHG引脚与指示发光二极管D2连接，指示发光二极管D2可显示第三颜色。第三颜色可以与第一颜色和第二颜色都不同，例如第三颜色可以是黄色。指示发光二级管D2用于检测充电管理芯片的工作状态。在一些实施例中，如图1所示，指示发光二级管D2可以对应本体4的另一个指示位置进行设置，即本体4表面的一个指示灯5为双色发光二极管D1，另一个指示灯1为指示发光二级管D2。这样，可以通过直接人眼观察指示发光二级管D2来判断充电管理芯片U3是否正常工作。
如图4所示，电压检测模块包括电阻R7和电阻R8，电阻R7的一端与锂电池BAT1的正极+VBAT连接，电阻R8的一端接地，电阻R8的另一端与电阻R7的另一端连接后形成检测端LV_ADC，检测端LV_ADC与MCU模块U1的引脚P15连接。在一个实施例中，R7的阻值为1.2MΩ，R8的阻值为200KΩ。电压检测模块的作用是分压，即通过电阻R7和电阻R8进行分压，避免直接检测锂电池BAT1正极+VBAT电压，防止锂电池BAT1正极+VBAT电压过大不利检测。
如图6所示，电源输入模块包括插座U2，在一个实施例中，插座U2为USB插座，外部电源为充电适配器，插座U2可以通过充电连接线与充电适配器连接。如图1所示，插座U2对应本体4上设置的插座6。电源输入模块的输出端+5V_USB和插座U2之间连接有保险丝F2。在一个实施例中，保险丝F2的电压额定值为5V，电流额定值为1A。电源输入模块的输出端+5V_USB通过电阻R2与充电电池模块的VIN引脚连接，在一个实施例中，R2的阻值为3.9Ω。
如图3所示，电源输入模块的输出端+5V_USB直接与MCU模块U1的引脚VDD50-I连接，用于对MCU模块U1供电。此外，如图7所示，电源输入模块的输出端+5V_USB还通过插入检测模块与MCU模块U1的引脚P46连接，使MCU模块U1得以检测电源输入模块是否与外部电源连接。电源输入模块还包括电容C1和电容C2。电容C1的一端接地，另一端与输出端+5V_USB连接。电容C2的一端接地，另一端与输出端+5V_USB连接。即电容C1和C2并联。在一个实施例中，电容C1参数为100nF，电容C2参数为10μF。
如图7所示，插入检测模块包括电阻R1，电阻R1的一端USB-DT连接至MCU模块U1的P46引脚，另一端+5V_USB连接至电源输入模块的输出端+5V_USB。其中电阻R1为上拉限流电阻，其作用是为了+5V_USB经过该电阻R1给MCU模块U1的IO提供一个输入高电平信号，使得MCU模块U1能够准确检测5V高电平。
根据上述电路，本发明提供以下的电源指示的方法，从而使指压式脉搏血氧仪呈现可供人眼直接观察的视觉效果，使得用户可以更加直观地了解指压式脉搏血氧仪的电源状态。
其中，电源指示方法包括：
当电源输入模块的插座U2通过充电连接线与外部电源连接时，充电电源通过保险丝F2到达网络+5V_USB，+5V_USB电源通过电阻R1经过网络USB-DT进入MCU模块U1，MCU模块U1的引脚P46将自动检测到有5V高电平，认为此时有外部充电电源接入。
如果MCU模块U1的引脚P15通过对检测端LV_ADC的检测而检测到锂电池BAT1处于充电状态，那么MCU模块U1就将通过引脚P52发出一定频率的脉冲控制信号，使第一发光二极管按照预定频率以第一颜色(例如蓝色)进行闪烁。
如果在接入外部电源时，MCU模块U1的引脚P15通过对检测端LV_ADC的检测而检测到锂电池BAT1处于电满状态，那么MCU模块U1就将通过引脚P52发出一个低电平信号，直接点亮第一发光二极管，使其以第一颜色(例如蓝色)常亮。
当电源输入模块的插座U2没有与外部电源连接时，只要指压式脉搏血氧仪一开机，MCU模块U1的引脚P15就将自动检测网络LV_ADC的电平，当LV_ADC处于程序控制算法认定的低电压状态，即电压检测模块的检测端LV_ADC的电压低于第一预定电压时，那么说明锂电池BAT1电量开始不足，此时MCU模块U1就将通过引脚P49发出一个低电平信号，直接点亮第二发光二极管，使其以第二颜色(例如橙色)常亮，从而提示用户尽快充电。
如果检测端LV_ADC的电平处于程序控制算法认定的极低电压状态，即电压检测模块的检测端LV_ADC的电压低于第二预定电压时，且第二预定电压低于第一预定电压，那么说明锂电池BAT1电量严重不足，此时MCU模块U1就将通过引脚P49发出一定频率的脉冲控制信号，使第二发光二极管按照预定频率以第二颜色(例如橙色)进行闪烁，从而提示用户： 设备即将自动关机，请立刻充电。
以上详细说明仅为本发明之较佳实施例的说明，非因此局限本发明之专利范围，所以，凡运用本创作内容所为之等效技术变化，均包含于本创作之专利范围内。

Claims (10)

  1. 一种应用双色发光二极管进行电源指示的电路，所述电路应用于指压式脉搏血氧仪，其特征在于，包括：
    MCU模块U1；
    双色发光二极管模块，包括双色发光二极管D1，所述双色发光二极管模块与所述MCU模块U1连接；
    电压检测模块，与所述MCU模块U1连接；
    充电电池模块，与所述电压检测模块连接；和
    电源输入模块，适于与外部电源连接，所述电源输入模块与所述MCU模块U1以及所述充电电池模块连接；
    其中，所述MCU模块U1适于根据所述电源输入模块和所述充电电池模块的状态，对所述双色发光二极管D1进行控制，使指压式脉搏血氧仪呈现可供人眼直接观察的视觉效果。
  2. 根据权利要求1所述的应用双色发光二极管进行电源指示的电路，其特征在于：所述电源输入模块包括插座U2，所述电源输入模块的输出端和所述插座U2之间连接有保险丝F2，所述电源输入模块的输出端与所述充电电池模块连接，且所述电源输入模块的输出端通过插入检测模块与所述MCU模块U1连接。
  3. 根据权利要求2所述的应用双色发光二极管进行电源指示的电路，其特征在于：所述插入检测模块包括电阻R1，所述电阻R1的一端连接至所述MCU模块U1，另一端连接至所述电源输入模块的输出端。
  4. 根据权利要求1所述的应用双色发光二极管进行电源指示的电路，其特征在于：所述充电电池模块包括充电管理芯片U3和锂电池BAT1，所述充电管理芯片U3与所述电源输入模块的输出端连接，所述锂电池BAT1的负极接地，正极与所述充电管理芯片U3连接，且所述锂电池BAT1的正极通过所述电压检测模块与所述MCU模块U1连接。
  5. 根据权利要求4所述的应用双色发光二极管进行电源指示的电路，其特征在于：所述电压检测模块包括电阻R7和电阻R8，所述电阻R7的一端与所述锂电池BAT1的正极连接，所述电阻R8的一端接地，所述电阻R8的另一端与所述电阻R7的另一端连接后与所述MCU模块U1连接。
  6. 根据权利要求4所述的应用双色发光二极管进行电源指示的电路，其特征在于：所述双色发光二极管D1包括可呈现第一颜色的第一发光二极管和可呈现第二颜色的第二发光二极管，其中所述第一颜色与所述第二颜色不同；所述双色发光二极管模块还包括电阻R4和 电阻R5，所述第一发光二极管的阳极通过所述电阻R4与所述MCU模块U1的VDD引脚连接，所述第二发光二极管的阳极通过所述电阻R5与所述MCU模块U1的同一个VDD引脚连接；所述第一发光二极管的阴极直接与所述MCU模块U1的一个I/O引脚连接，所述第二发光二极管的阴极直接与所述MCU模块U1的另一个I/O引脚连接。
  7. 根据权利要求6所述的应用双色发光二极管进行电源指示的电路，其特征在于：
    所述血氧仪呈现可供人眼直接观察的视觉效果包括：
    当所述电源输入模块与所述外部电源连接且所述锂电池BAT1处于充电状态时，所述MCU模块U1控制所述第一发光二极管，使其按照预定频率以所述第一颜色进行闪烁；
    当所述电源输入模块与所述外部电源连接且所述锂电池BAT1处于电满状态时，所述MCU模块U1控制所述第一发光二极管，使其以所述第一颜色常亮。
    当所述电源输入模块不与所述外部电源连接，且所述MCU模块U1检测到所述电压检测模块的检测端的电压低于第一预定电压时，所述MCU模块U1控制所述第二发光二极管，使其以所述第二颜色常亮；
    当所述电源输入模块不与所述外部电源连接，且所述MCU模块U1检测到所述电压检测模块的检测端的电压低于第二预定电压时，所述MCU模块U1控制所述第二发光二极管，使其按照预定频率以所述第二颜色进行闪烁；
    所述第二预定电压低于所述第一预定电压。
  8. 根据权利要求4所述的应用双色发光二极管进行电源指示的电路，其特征在于：所述充电管理芯片具有与所述电源输入模块连接的VIN引脚、与所述锂电池BAT1连接用于充电电流输出的BAT引脚以及用于充电状态输出的CHG引脚，所述CHG引脚与指示发光二极管D2连接，所述指示发光二极管D2可显示第三颜色。
  9. 一种应用权利要求1～8任意一项所述的电路进行电源指示的方法，所述方法应用于指压式脉搏血氧仪，其特征在于，包括：
    当电源输入模块与外部电源连接且充电电池模块的锂电池BAT1处于充电状态时，MCU模块U1控制双色发光二极管D1的第一发光二极管，使其按照预定频率以第一颜色进行闪烁；
    当电源输入模块与外部电源连接且充电电池模块的锂电池BAT1处于电满状态时，MCU模块U1控制双色发光二极管D1的第一发光二极管，使其以第一颜色常亮。
    当电源输入模块不与外部电源连接，且MCU模块U1检测到电压检测模块的检测端的电压低于第一预定电压时，MCU模块U1控制双色发光二极管D1的第二发光二极管，使其以 第二颜色常亮；
    当电源输入模块不与外部电源连接，且MCU模块U1检测到电压检测模块的检测端的电压低于第二预定电压时，MCU模块U1控制双色发光二极管D1的第二发光二极管，使其按照预定频率以第二颜色进行闪烁；
    其中，所述第二预定电压低于所述第一预定电压。
  10. 一种应用双色发光二极管进行电源指示的血氧仪，其特征在于，所述血氧仪为指夹式脉搏血氧仪，所述血氧仪包括本体和权利要求1～8任意一项所述的电路，所述本体的表面具有显示屏和位于所述显示屏一侧的指示位置，双色发光二极管D1对应所述指示位置进行设置。
PCT/CN2020/124295 2020-10-28 2020-10-28 应用双色发光二极管进行电源指示的电路、方法和血氧仪 WO2022087875A1 (zh)

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