CN110632285B - Blood glucose meter device - Google Patents
Blood glucose meter device Download PDFInfo
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- CN110632285B CN110632285B CN201910900015.6A CN201910900015A CN110632285B CN 110632285 B CN110632285 B CN 110632285B CN 201910900015 A CN201910900015 A CN 201910900015A CN 110632285 B CN110632285 B CN 110632285B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
- G01N27/3271—Amperometric enzyme electrodes for analytes in body fluids, e.g. glucose in blood
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/414—Ion-sensitive or chemical field-effect transistors, i.e. ISFETS or CHEMFETS
- G01N27/4145—Ion-sensitive or chemical field-effect transistors, i.e. ISFETS or CHEMFETS specially adapted for biomolecules, e.g. gate electrode with immobilised receptors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/52—Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper and including single- and multilayer analytical elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/66—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood sugars, e.g. galactose
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The application discloses blood glucose meter equipment includes: the single chip microcomputer is used for controlling the first pin to output a low level signal and controlling the second pin to be in an internal pull-up state in a low power consumption mode; the second pin is used for enabling the single chip microcomputer to be in a starting state when the falling edge is detected; or, the first pin is controlled to output a high level signal and control the internal pull-down state of the second pin in the low power consumption mode; the second pin is used for enabling the single chip microcomputer to be in a starting state when the rising edge is detected; the first electrode is connected with a first pin of the singlechip and is used for outputting a first voltage; the second electrode is connected with a second pin of the singlechip and is used for outputting a second voltage; wherein the first voltage and the second voltage are used to provide a voltage to the sensor or test strip. The first electrode and the second electrode which are used for pressurizing the sensor or the test strip in the blood glucose meter through short circuit can enable the single chip microcomputer to be in a starting state.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a blood glucose meter device.
Background
A blood glucose meter device is an electronic instrument that measures blood glucose levels. In the existing blood glucose meter equipment, a collected blood sample is placed in a sensor or a test strip, a test current is obtained after the two electrodes of the blood glucose meter equipment pressurize the sensor or the test strip, and the blood glucose meter equipment converts the test current into a blood glucose value, so that the measurement of the blood glucose level can be completed.
However, in order to implement the power-on function in the conventional blood glucose meter device, a specific switch device is further added to control the start-up of the blood glucose meter device. For example, activation of the glucose meter is accomplished by shorting or breaking additional added contacts. However, the increase of the specific switch device can cause the occupied volume of the blood glucose meter device to be larger, and the requirement of the current user on the miniaturization of the blood glucose meter device can not be met.
Disclosure of Invention
Based on the above-mentioned deficiencies of the prior art, the present application proposes a blood glucose meter device to enable activation of the blood glucose meter device by two electrodes in the blood glucose meter that pressurize a sensor or test strip.
A first aspect of the present invention discloses a blood glucose meter device, comprising:
the single chip microcomputer is used for controlling a first pin of the single chip microcomputer to output a low-level signal and controlling a second pin of the single chip microcomputer to be in an internal pull-up state in a low-power-consumption mode; the second pin is used for enabling the single chip microcomputer to be in a starting state when a falling edge is detected; or, the controller is configured to control a first pin of the single chip microcomputer to output a high level signal and control a second pin of the single chip microcomputer to be in an internal pull-down state in the low power consumption mode; the second pin is used for enabling the single chip microcomputer to be in a starting state when a rising edge is detected; the low power consumption mode is a mode that the single chip microcomputer only starts partial functions; the single chip microcomputer can establish communication connection with the control equipment when in a starting state;
the first electrode is connected with a first pin of the singlechip and is used for outputting a first voltage;
the second electrode is connected with a second pin of the singlechip and is used for outputting a second voltage; wherein the first voltage and the second voltage are used to provide a voltage to a sensor or test strip.
Optionally, in the above blood glucose meter device, the single chip microcomputer is further configured to:
after a test starting instruction is received, controlling a third pin of the single chip microcomputer to output a low level signal and controlling a fourth pin of the single chip microcomputer to output a high level signal;
wherein the blood glucose meter device further comprises:
the first voltage unit is connected with the first electrode and used for receiving a third voltage and a second power supply signal and controlling the first electrode to output the first voltage according to the third voltage and the second power supply signal;
the second voltage unit is connected with the second electrode and used for receiving the fourth voltage and the second power supply signal and controlling the second electrode to output the second voltage according to the fourth voltage and the second power supply signal;
the power supply unit is respectively connected with the first voltage unit, the second voltage unit and the third pin of the single chip microcomputer, and is used for receiving a first power supply signal and a low level signal output by the third pin of the single chip microcomputer and outputting a second power supply signal according to the first power supply signal and the low level signal output by the third pin of the single chip microcomputer; the second power supply signal is used for supplying power to the first voltage unit and the second voltage unit;
and the grounding unit is respectively connected with the first voltage unit, the second voltage unit and the fourth pin of the singlechip and is used for receiving a high level signal output by the fourth pin of the singlechip and controlling the electronic devices in the first voltage unit and the second voltage unit to be grounded according to the high level signal output by the fourth pin of the singlechip.
Optionally, in the above blood glucose meter device, the second voltage unit is further configured to:
when the first voltage and the second voltage provide voltage for the sensor or the test strip, outputting test voltage according to test current passing through the sensor or the test strip; wherein the test voltage is converted into a blood glucose value of a blood sample in the sensor or the test strip by the single chip microcomputer.
Optionally, in the above blood glucose meter device, the single chip microcomputer is further configured to:
and after a test end instruction is received or the test current in the sensor or the test strip is not detected within a preset time length, automatically entering the low power consumption mode.
Optionally, in the above blood glucose meter device, the first voltage unit includes:
the non-inverting input end of the first operational amplifier is connected with one end of a first resistor; the other end of the first resistor receives the third voltage; the inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier; the power supply terminal of the first operational amplifier receives the second power supply signal.
Optionally, in the above blood glucose meter device, the second voltage unit includes:
a second operational amplifier having an inverting input terminal connected to the second electrode, wherein a non-inverting input terminal of the second operational amplifier is connected to one end of a second resistor, the other end of the second resistor receives the fourth voltage, and a power supply terminal of the second operational amplifier receives the second power supply signal;
one end of the third resistor is connected with the inverting input end of the second operational amplifier, and the other end of the third resistor is connected with the output end of the second operational amplifier;
and one end of the first capacitor is connected with the inverting input end of the second operational amplifier, and the other end of the first capacitor is connected with the output end of the second operational amplifier.
Optionally, in the above blood glucose meter device, the power supply unit includes:
a source of the first PMOS tube receives the first power supply voltage, and a drain of the first PMOS tube outputs the second power supply voltage;
one end of the fourth resistor is connected with the source electrode of the first PMOS tube, and the other end of the fourth resistor is connected with the grid electrode of the first PMOS tube;
and one end of the fifth resistor is connected with the grid electrode of the first PMOS tube, and the other end of the fifth resistor is connected with the third pin of the singlechip.
Optionally, in the above blood glucose meter device, the grounding unit includes:
the drain of the first NMOS tube is grounded, and the source of the first NMOS tube is respectively connected with the grounding ends of the electronic devices in the first voltage unit and the second voltage unit;
one end of the sixth resistor is connected with the source electrode of the first NMOS tube, and the other end of the sixth resistor is connected with the grid electrode of the first NMOS tube;
one end of the seventh resistor is connected with the grid electrode of the first NMOS tube, and the other end of the seventh resistor is connected with the fourth pin of the singlechip.
According to the technical scheme, in the blood glucose meter equipment provided by the application, the singlechip controls the first pin of the singlechip to output a low level signal and controls the second pin of the singlechip to be in an internal pull-up state in a low power consumption mode. The second pin is used for enabling the single chip microcomputer to be in a starting state when the falling edge is detected. Therefore, when the first electrode connected with the first pin of the single chip microcomputer and the second electrode connected with the second pin of the single chip microcomputer are in short circuit, a high level signal output by the second pin can be pulled down to generate a falling edge, and the single chip microcomputer is enabled to be in a starting state. Or the singlechip controls a first pin of the singlechip to output a high-level signal and controls a second pin of the singlechip to be in an internal pull-down state in a low-power-consumption mode. The second pin is used for enabling the single chip microcomputer to be in a starting state when the rising edge is detected. When a first electrode connected with a first pin of the single chip microcomputer and a second electrode connected with a second pin of the single chip microcomputer are in short circuit, a low level signal output by the second pin is pulled high, a rising edge is generated, and the single chip microcomputer is enabled to be in a starting state. The first electrode is used for outputting a first voltage, and the second electrode is used for outputting a second voltage. The first voltage and the second voltage are used to provide a voltage to the sensor or test strip. Because the two electrodes for providing voltage for the sensor or the test strip can be short-circuited to start the device, additional switch equipment is not needed to start the blood glucose meter equipment, and the volume occupied by the blood glucose meter equipment is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a blood glucose meter device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another glucose meter device according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a first voltage unit in a blood glucose meter device according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a second voltage unit in a blood glucose meter device according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a power supply unit in a blood glucose meter device according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a grounding unit in a blood glucose meter device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present application discloses a blood glucose meter device 100, comprising: singlechip, first electrode and second electrode. The first pin P1 of the single chip microcomputer is connected with the first electrode, and the second pin P2 of the single chip microcomputer is connected with the second electrode.
And the singlechip is used for controlling a first pin P1 of the singlechip to output a low-level signal and controlling a second pin P2 of the singlechip to be in an internal pull-up state in a low power consumption mode. The second pin P2 is used to enable the single chip microcomputer to be in a start state when a falling edge is detected. Or, the single chip microcomputer is used for controlling the first pin P1 of the single chip microcomputer to output a high-level signal and controlling the second pin P2 of the single chip microcomputer to be in an internal pull-down state in the low power consumption mode. The second pin P2 is used to enable the single chip microcomputer to be in a startup state when a rising edge is detected. The low power consumption mode is a mode that the singlechip only starts partial functions. The singlechip can establish communication connection with the control equipment when in a starting state.
The singlechip can only keep singlechip awakening function under the low-power consumption mode, namely the singlechip can be awakened, and enters a starting state from a low-power consumption state. Alternatively, the low power mode may be reserved with other functions in addition to the wake-up function. However, when the single chip microcomputer is in the low power consumption mode, communication connection cannot be established between the single chip microcomputer and the control equipment, namely, the single chip microcomputer cannot broadcast signals, and further the single chip microcomputer cannot measure the blood sugar value under the control of the control equipment. When the blood glucose meter equipment is connected with a battery, namely a power supply system, the single chip microcomputer in the blood glucose meter equipment enters a low power consumption mode, and the single chip microcomputer is very low in power and very low in power consumption in the low power consumption mode. The single chip microcomputer in the embodiment of the application can be a Bluetooth single chip microcomputer, and when the Bluetooth single chip microcomputer is in a starting state, broadcasting can be started, and communication connection can be established between the Bluetooth single chip microcomputer and other control equipment. The control device can be an electronic device such as a mobile phone, a computer, a tablet and the like.
It should be noted that, in the low power consumption mode, the configuration of the second pin P2 in the internal pull-up state means that the second pin P2 is configured inside the single chip microcomputer and is connected to a power supply signal through a pull-up resistor, so that the second pin outputs a high level signal. In the low power consumption mode, the configuration of the second pin P2 in the internal pull-down state means that the second pin P2 configured inside the single chip microcomputer is connected to a low voltage or ground through a pull-down resistor, so that the second pin outputs a low level signal. The control of the pin state of the singlechip by the singlechip is realized by a program written into the singlechip.
And the first electrode is connected with a first pin P1 of the singlechip and is used for outputting a first voltage.
And the second electrode is connected with a second pin P2 of the singlechip and is used for outputting a second voltage.
Wherein the first voltage and the second voltage are used to provide a voltage to the sensor or test strip. The output of the first voltage and the second voltage is controlled by the singlechip. When the blood glucose meter device starts to test, the single chip machine controls the first electrode to output a first voltage and controls the second electrode to output a second voltage, the first voltage and the second voltage pressurize the sensor or the test strip, so that current flows through the sensor or the test strip, and a blood sample is placed in the sensor or the test strip, therefore, the value of the current flowing through the sensor or the test strip can be converted into the blood glucose value of the blood sample by the single chip machine.
It should be noted that the first electrode and the second electrode are two electrodes already existing in the existing blood glucose meter device. However, the first electrode and the second electrode in the existing blood glucose meter device only have the function of supplying a voltage to the sensor or test strip, i.e., are used only when testing the blood glucose level. In the application, the first electrode is connected with the first pin P1 of the single chip microcomputer, and the second electrode is connected with the second pin P2 of the single chip microcomputer. If the first pin P1 is controlled by the single chip to output a low level and the second pin P2 is in an internal pull-up state in the low power consumption mode, the first electrode also outputs a low level signal in the low power consumption mode, and the second electrode outputs a high level signal. When a user wants to wake up the single chip microcomputer, namely, the single chip microcomputer enters a starting state, only the first electrode and the second electrode need to be in short circuit, and the second electrode is connected to a power supply through the pull-up resistor, so that before the second electrode is not in short circuit with the first electrode, a high level signal is output, and after the second electrode is in short circuit with the first electrode, the second electrode is pulled down by a low level signal output by the first electrode, and the second electrode is pulled down to a low level by the high level signal. And because the second electrode is connected with the second pin P2, the singlechip is in a starting state when the second pin P2 detects a falling edge, and therefore when the first electrode and the second electrode are short-circuited, the singlechip can be started.
Similarly, if the single chip microcomputer controls the first pin P1 to output a high level and the second pin P2 to be in an internal pull-down state in the low power consumption mode, the first electrode also outputs a high level signal in the low power consumption mode, and the second electrode outputs a low level signal. And when the user wants to awaken the singlechip up, let the singlechip enter the starting condition promptly, only need to connect first electrode and second electrode short circuit, because the second electrode is through pull-down resistance access ground or a low voltage, therefore the second electrode is before short circuit with first electrode, what output is low level signal, with first electrode short circuit back, be equivalent to directly through first electrode access power signal, can be pulled high by the high level signal of first electrode output promptly for the second electrode is pulled up to high level by the low level. And because the second electrode is connected with the second pin P2, the singlechip is in a starting state when the second pin P2 detects a rising edge, and therefore when the first electrode and the second electrode are short-circuited, the singlechip can be started.
In the prior art, the single chip microcomputer cannot be started by the first electrode and the second electrode, the first electrode and the second electrode only have the function of providing voltage for the sensor or the test strip, and the single chip microcomputer can be controlled to be started only by adding an additional switch device in the conventional glucometer equipment. In the embodiment of the application, the singlechip can be started by short-circuiting the first electrode and the second electrode in the low power consumption mode, so that the singlechip is not required to be started by adding an additional switching device, the occupied volume of the blood glucose meter equipment is reduced, and the blood glucose meter equipment provided by the embodiment of the application can meet the requirement of a user on microminiaturization of the blood glucose meter equipment. In addition, the volume occupied by the blood glucose meter equipment is reduced, and the advantages of reducing the cost, reducing the power consumption of the blood glucose meter equipment and the like can be achieved.
Optionally, referring to fig. 2, in an embodiment of the present application, the single chip microcomputer may be further configured to control the third pin P3 of the single chip microcomputer to output a low level signal and control the fourth pin P4 of the single chip microcomputer to output a high level signal after receiving the test start instruction. Wherein, blood glucose meter equipment still includes: a first voltage unit 201, a second voltage unit 202, a power supply unit 203, and a ground unit 204.
And a test starting command is sent to the single chip microcomputer by the control equipment. When the single chip microcomputer is in the low power consumption mode, a user short-circuits the first electrode and the second electrode, and the single chip microcomputer enters a starting state from the low power consumption mode. After the single chip microcomputer enters a starting state, communication connection can be established with the control equipment. After the control equipment is in communication connection with the single chip microcomputer, a test starting instruction can be sent to the single chip microcomputer to control the blood glucose meter equipment to start blood glucose detection. After the single chip microcomputer receives the test starting instruction, the third pin P3 of the single chip microcomputer is controlled to output a low level signal, and the fourth pin P4 of the single chip microcomputer is controlled to output a high level signal. It should be noted that before the test start command is not received, the first pin P1, the second pin P2, the third pin P3 and the fourth pin P4 of the single chip microcomputer may be set to a high impedance state, so as to avoid affecting the operation of the circuit connected to the pins. The high-impedance state refers to that a certain node in the circuit has relatively higher impedance relative to other points in the circuit, and if the high-impedance state is input into a next-stage circuit again, the high-impedance state has no influence on the next-stage circuit, and the high-impedance state is not the same as the high-impedance state.
And a first voltage unit 201 connected to the first electrode, for receiving a third voltage and a second power signal, and controlling the first electrode to output the first voltage according to the third voltage and the second power signal.
Wherein the second power signal is generated from the first power signal, which refers to the total power signal in the blood glucose meter device. The first power signal may be passed through a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) to generate a second power signal. Optionally, the second power signal may be dedicated to power the analog circuit portion, and the first power signal, i.e., the total power signal, may be dedicated to power the digital circuit portion, so as to reduce interference between the digital circuit portion and the analog circuit portion, and further, to implement independent control of turning off the second power signal when the blood glucose meter device does not need to use the analog circuit portion, so as to reduce power consumption.
It should be noted that the second power signal can be received only after the single chip receives the test start instruction, and then the first electrode can be controlled to output the first voltage. Wherein, the first voltage output by the first motor is used for providing voltage for the sensor or the test strip.
Optionally, referring to fig. 3, in an embodiment of the present application, the first voltage unit includes:
and the output end of the first operational amplifier U1 is connected with the first electrode, and the non-inverting input end of the first operational amplifier U1 is connected with one end of the first resistor R1. The other end of the first resistor R1 receives a third voltage V3. The inverting input terminal of the first operational amplifier U1 is connected to the output terminal of the first operational amplifier U1, and the power supply terminal of the first operational amplifier U1 receives a second power supply signal VCC 2.
Since the first operational amplifier U1 in the circuit diagram shown in fig. 3 corresponds to a voltage follower, the first voltage V1 output by the first electrode and the third voltage V3 received by the non-inverting input terminal of the first operational amplifier U1 are equal in value. The magnitude of the first voltage V1 output by the first electrode may be adjusted according to the magnitude of the value of the third voltage V3. The power supply end of the first operational amplifier U1 can receive the second power signal VCC2 only after the single chip microcomputer receives the test start instruction, and then can control the first electrode to output the first voltage V1.
It should be noted that the third voltage V3 is an externally-connected voltage signal, and the implementation of the embodiment for generating the third voltage is not affected. It should be further noted that the embodiment shown in fig. 3 is only one implementation manner of the first voltage unit, including but not limited to what is proposed in the embodiments of the present application.
And a second voltage unit 202 connected to the second electrode, for receiving a fourth voltage and a second power signal, and controlling the second electrode to output a second voltage according to the fourth voltage and the second power signal.
The second voltage unit 202 receives the second power signal after the single chip receives the test start command, and then controls the second electrode to output the second voltage. The second voltage is used to provide a voltage to the sensor or test strip.
Optionally, in a specific embodiment of the present application, the second voltage unit 202 is further configured to:
the first voltage and the second voltage provide a voltage to the sensor or strip, and a test voltage is output based on a test current passing through the sensor or strip.
Wherein, the testing voltage is converted into the blood sugar value of the blood sample in the sensor or the test strip through the singlechip. Specifically, a voltage difference between the first voltage and the second voltage is applied to the sensor or the test strip, that is, the first electrode and the second electrode are in contact with the sensor or the test strip, so that a test current is generated on the sensor or the test strip, and the second voltage unit 202 outputs a test voltage corresponding to the test current according to the test current. Since the sensor or strip has a blood sample of the user, a test voltage corresponding to a test current flowing through the sensor or strip can be converted into a blood glucose value of the blood sample by the single chip microcomputer. Specifically, a test voltage is input to the analog-to-digital converter, and a voltage value of the test voltage is converted from an analog quantity to a digital quantity. Because the singlechip is a digital circuit, the singlechip can only receive the test voltage value converted into digital quantity. And after the test voltage value converted into the digital quantity is received by the singlechip, converting the test voltage value into the blood sugar value of the blood sample by the singlechip according to a preset algorithm, and finishing the measurement of the blood sugar. Alternatively, the blood glucose value measured by the blood glucose meter may be displayed on a display screen of the blood glucose meter device, may be transmitted to the control device, or the like.
Optionally, referring to fig. 4, in an embodiment of the present application, the second voltage unit includes:
the inverting input terminal of the second operational amplifier U2 is connected to the second electrode, the non-inverting input terminal of the second operational amplifier U2 is connected to one terminal of a second resistor R2, the other terminal of the second resistor R2 receives a fourth voltage V4, and the power supply terminal of the second operational amplifier U2 receives a second power supply signal VCC 2.
And one end of a third resistor R3, one end of a third resistor R3 is connected with the inverting input end of the second operational amplifier U2, and the other end of the third resistor R3 is connected with the output end of the second operational amplifier.
One end of the first capacitor C1 and one end of the first capacitor C1 are connected to the inverting input terminal of the second operational amplifier U2, and the other end of the first capacitor C1 is connected to the output terminal of the second operational amplifier U2.
In the circuit diagram of the second voltage unit shown in fig. 4, the second voltage V2 output by the second electrode has the same value as the fourth voltage V4 received by the non-inverting input terminal of the second operational amplifier U2. The value of the second voltage V2 may be adjusted by adjusting the value of the fourth voltage V4. The fourth voltage V4 is an externally input voltage, and the implementation of the embodiment of the present application is not affected by the difference in the manner of generating the fourth voltage V4.
When the first electrode and the second electrode are in contact with the sensor or the test strip, a voltage difference between a first voltage V1 output by the first electrode and a second voltage V2 output by the second electrode is applied to the sensor or the test strip, so that a test current flows through the sensor or the test strip, the test current outputs a test voltage V-OUT through a second operational amplifier U2, the test voltage V-OUT can be converted from an analog quantity to a digital quantity through an analog-to-digital converter, and the value of the test voltage V-OUT converted into the digital quantity is converted into a blood glucose value through an algorithm by the single chip microcomputer, so that the measurement of the blood glucose value can be completed.
It should be noted that the embodiment shown in fig. 4 is only one implementation of the second voltage unit, and the implementation of the second voltage unit includes, but is not limited to, what is proposed in the examples of this application.
The power supply unit 203, which is respectively connected to the first voltage unit 201, the second voltage unit 202, and the third pin P3 of the single chip microcomputer, is configured to receive the first power signal and the low level signal output from the third pin P3 of the single chip microcomputer, and output the second power signal according to the first power signal and the low level signal output from the third pin P3 of the single chip microcomputer.
Wherein the second power signal is used to power the first voltage unit 201 and the second voltage unit 202. The first power supply signal is a main power supply signal and is mainly used for supplying power to the single chip microcomputer. When the control device sends a test start instruction to the single chip microcomputer, the third pin P3 of the single chip microcomputer outputs a low level signal. The power unit 203 generates a second power signal according to the first power signal when receiving the low level signal outputted from the third pin P3. Thereby enabling the first voltage unit 201 to control the first electrode to output the first voltage, and enabling the second voltage unit 202 to control the second electrode to output the second voltage. The power supply unit 203 outputs the second power supply signal only when receiving the low level signal output by the third pin P3, thereby ensuring that the first voltage unit 201 and the second voltage unit 202 start to operate after the single chip microcomputer receives the test start instruction, and before the single chip microcomputer does not receive the test start instruction, the power supply unit 203 does not output the second power supply signal, the first voltage unit 201 and the second voltage unit 202 are not in the operating state, and the power of the blood glucose meter is reduced.
Optionally, referring to fig. 5, in an embodiment of the present application, the power supply unit includes:
the source of the first PMOS transistor Q1, Q1 receives the first power voltage VCC1, and the drain of the first PMOS transistor Q1 outputs the second power voltage VCC 2.
One end of a fourth resistor R4, a fourth resistor R4 is connected with the source electrode of the first PMOS transistor Q1, and the other end of the fourth resistor R4 is connected with the grid electrode of the first PMOS transistor Q1.
One end of a fifth resistor R5 and one end of a fifth resistor R5 are connected with the grid electrode of the first PMOS tube Q1, and the other end of the fifth resistor R5 is connected with a third pin P3 of the single chip microcomputer.
For the circuit shown in fig. 5, before the single chip microcomputer does not receive the test start instruction, the third pin P3 of the single chip microcomputer is controlled to be in a high impedance state, that is, the third pin is turned off in a floating manner. Therefore, at this time, the gate and the source of the first PMOS transistor Q1 are connected through the fourth resistor R4, and the voltages of the gate and the source are equal and are the first power signal VCC1, so that the first PMOS transistor Q1 does not satisfy the on condition at this time and is in the off state.
When the single chip receives the test start command, the single chip controls the third pin P3 to output a low level signal, so that the gate voltage of the first PMOS transistor Q1 is
The conduction condition of the first PMOS transistor Q1 is that the difference between the source voltage and the gate voltage is greater than the turn-on voltage. The source voltage of the first PMOS transistor Q1 is the first power signal VCC1, so that the difference between the source voltage and the gate voltage of the first PMOS transistor Q1 can be ensured to be greater than the turn-on voltage by adjusting the resistances of the fifth resistor R5 and the fourth resistor R4. For example, the resistance of the fifth resistor R5 may be made much smaller than the resistance of the fourth resistor R4. When the first PMOS transistor Q1 is turned on, the second power signal VCC2 output by the first PMOS transistor Q1 supplies power to the first voltage unit and the second voltage unit, respectively. For example, the second power supply signal VCC2 is switched into the power supply terminal of the first operational amplifier U1 shown in FIG. 3, and FIG. 4The power supply terminal of the second operational amplifier U2 is shown.
It should be noted that the embodiment shown in fig. 5 is only one implementation of the power supply unit, and the implementation of the power supply unit includes, but is not limited to, what is proposed in the examples of this application.
The grounding unit 204 is respectively connected to the first voltage unit 201, the second voltage unit 202 and the fourth pin P4 of the single chip microcomputer, and is configured to receive a high level signal output by the fourth pin P4 of the single chip microcomputer and control the electronic devices in the first voltage unit 201 and the second voltage unit 202 to be grounded according to the high level signal output by the fourth pin P4 of the single chip microcomputer.
Before the single chip microcomputer does not receive the test start instruction, the fourth pin P4 is controlled to be in the high impedance state or the low level state, and at this time, the grounding unit 204 does not receive the high level signal output by the fourth pin P4, so that the electronic devices in the first voltage unit 201 and the second voltage unit 202 cannot be controlled to be grounded. Therefore, the first voltage unit 201 and the second voltage unit 202 are not in working state, and do not control the first electrode and the second electrode to output voltage to the sensor or the test strip.
After the single chip microcomputer receives the test start command, the fourth pin P4 is controlled to output a high level signal, so that the grounding unit 204 controls the electronic devices in the first voltage unit 201 and the second voltage unit 202 to be grounded according to the high level signal output by the fourth pin P4 of the single chip microcomputer. In addition, after receiving the test start instruction, the single chip microcomputer also controls the third pin P3 to output a low level signal, so that the power supply unit 203 outputs a second power supply signal to supply power to the first voltage unit 201 and the second voltage unit 202. Therefore, the first voltage unit 201 and the second voltage unit 202 are controlled by the grounding unit 204 and the power supply unit 203, and the grounding unit 204 and the power supply unit 203 are controlled by the single chip microcomputer. After the single chip microcomputer receives a test starting instruction, the output of the first electrode and the output of the second electrode are controlled by controlling the states of the third pin P3 and the fourth pin P4.
Optionally, referring to fig. 6, in an embodiment of the present application, the ground unit includes:
the drain of the first NMOS transistor Q2, the drain of the first NMOS transistor Q2 are grounded, and the source of the first NMOS transistor Q2 is connected to the ground terminals of the electronic devices in the first voltage unit and the second voltage unit, respectively.
One end of a sixth resistor R6, a sixth resistor R6 is connected with the source electrode of the first NMOS transistor Q2, and the other end of the sixth resistor R6 is connected with the grid electrode of the first NMOS transistor Q2.
One end of a seventh resistor R7 and one end of a seventh resistor R7 are connected with the grid electrode of the first NMOS transistor Q2, and the other end of the seventh resistor R7 is connected with a fourth pin P4 of the single chip microcomputer.
The source of the first NMOS transistor Q2 is connected to the ground terminals of the electronic devices in the first voltage unit and the second voltage unit, respectively, for example, the ground terminal AGND of the first operational amplifier U1 of the first voltage unit shown in fig. 3, and the ground terminal AGND of the second operational amplifier U2 of the second voltage unit shown in fig. 4.
When the single chip microcomputer does not receive a test start instruction, the fourth pin P4 is in a high impedance state or a low level state, so that the gate voltage of the first NMOS transistor Q2 is not higher than the source voltage, and the first NMOS transistor Q2 is in a cut-off state, so that the ground terminal of the electronic device in the first voltage unit is not grounded and is in a floating state, and the first voltage unit is not in a working state at this time. Similarly, the ground terminal of the electronic device of the second voltage unit is not grounded and is not in an operating state.
When the single chip receives a test start instruction, the fourth pin P4 is in a high level state, the source of the first NMOS tube Q2 is grounded GND, and the gate voltage is
When the difference between the gate voltage and the source voltage is greater than the turn-on voltage, the first NMOS transistor Q2 can be turned on, so that the first NMOS transistor Q2 can be turned on only by adjusting the resistances of the sixth resistor R6 and the seventh resistor R7, and the ground terminals of the electronic devices in the first voltage unit and the second voltage unit are controlled to be grounded GND.
It should be noted that the embodiment shown in fig. 6 is only one implementation of the ground unit, and the implementation of the ground unit includes, but is not limited to, what is proposed in the embodiments of the present application.
Optionally, in a specific embodiment of the present application, the single chip microcomputer is further configured to:
and after a test ending instruction is received, or after the test current in the sensor or the test strip is not detected within a preset time length, automatically entering a low power consumption mode.
Wherein, the test end instruction is sent to the singlechip by the control equipment. After the blood glucose meter equipment completes blood glucose detection, in order to reduce the power consumed by the blood glucose meter, a test ending instruction can be sent to the single chip microcomputer, so that the single chip microcomputer enters a low power consumption mode.
Or after the single chip microcomputer enters the on state, when the test current in the sensor or the test strip is not detected within a preset time span, the fact that the sensor or the test strip is not connected between the first electrode and the second electrode means that the user does not use the blood glucose meter device to detect the blood glucose value currently, and therefore the single chip microcomputer can automatically enter the low power consumption mode. Wherein, the duration can be set according to the actual situation. The time length may be set short, for example, about 1 minute, in consideration of a factor of saving the power of the blood glucose meter device, for example.
It should be noted that, for the execution process and principle inside the blood glucose meter device when the single chip microcomputer is in the low power consumption mode, reference may be made to the corresponding parts in the blood glucose meter device provided in the embodiments of the present application, and details are not described here.
In the blood glucose meter equipment that this application provided, the singlechip is under low-power consumption mode, and the second pin of the first pin output low level signal of control singlechip and control singlechip is inside pull-up state. And the second pin is used for enabling the singlechip to be in a starting state when the falling edge is detected. Therefore, when the first electrode connected with the first pin of the single chip microcomputer and the second electrode connected with the second pin of the single chip microcomputer are in short circuit, a high level signal output by the second pin can be pulled down to generate a falling edge, and the single chip microcomputer is enabled to be in a starting state. Or the singlechip controls a first pin of the singlechip to output a high-level signal and controls a second pin of the singlechip to be in an internal pull-down state in a low-power-consumption mode. The second pin is used for enabling the single chip microcomputer to be in a starting state when the rising edge is detected. When a first electrode connected with a first pin of the single chip microcomputer and a second electrode connected with a second pin of the single chip microcomputer are in short circuit, a low level signal output by the second pin is pulled high, a rising edge is generated, and the single chip microcomputer is enabled to be in a starting state. The first electrode is used for outputting a first voltage, and the second electrode is used for outputting a second voltage. The first voltage and the second voltage are used to provide a voltage to the sensor or test strip. Because the two electrodes used for providing voltage for the sensor or the test strip can be short-circuited to start the blood glucose meter, additional switch equipment is not needed to start the blood glucose meter, and the volume occupied by the blood glucose meter is reduced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A blood glucose meter device, comprising:
the single chip microcomputer is used for controlling a first pin of the single chip microcomputer to output a low level signal and controlling a second pin of the single chip microcomputer to be in an internal pull-up state in a low power consumption mode; the second pin is used for enabling the single chip microcomputer to be in a starting state when a falling edge is detected; or, the controller is configured to control a first pin of the single chip microcomputer to output a high level signal and control a second pin of the single chip microcomputer to be in an internal pull-down state in the low power consumption mode; the second pin is used for enabling the single chip microcomputer to be in a starting state when a rising edge is detected; the low power consumption mode is a mode that the single chip microcomputer only starts partial functions including the awakening function; the single chip microcomputer can establish communication connection with the control equipment when in a starting state;
the first electrode is connected with a first pin of the singlechip and is used for outputting a first voltage;
the second electrode is connected with a second pin of the singlechip and is used for outputting a second voltage; wherein the first voltage and the second voltage are used to provide a voltage to a sensor or test strip.
2. The apparatus of claim 1, wherein the single-chip microcomputer is further configured to:
after a test starting instruction is received, controlling a third pin of the single chip microcomputer to output a low level signal and controlling a fourth pin of the single chip microcomputer to output a high level signal;
wherein the blood glucose meter device further comprises:
the first voltage unit is connected with the first electrode and used for receiving a third voltage and a second power supply signal and controlling the first electrode to output the first voltage according to the third voltage and the second power supply signal;
the second voltage unit is connected with the second electrode and used for receiving a fourth voltage and the second power supply signal and controlling the second electrode to output the second voltage according to the fourth voltage and the second power supply signal;
the power supply unit is respectively connected with the first voltage unit, the second voltage unit and the third pin of the single chip microcomputer, and is used for receiving a first power supply signal and a low level signal output by the third pin of the single chip microcomputer and outputting a second power supply signal according to the first power supply signal and the low level signal output by the third pin of the single chip microcomputer; the second power supply signal is used for supplying power to the first voltage unit and the second voltage unit;
and the grounding unit is respectively connected with the first voltage unit, the second voltage unit and the fourth pin of the singlechip and is used for receiving a high level signal output by the fourth pin of the singlechip and controlling the electronic devices in the first voltage unit and the second voltage unit to be grounded according to the high level signal output by the fourth pin of the singlechip.
3. The apparatus of claim 2, wherein the second voltage unit is further configured to:
when the first voltage and the second voltage provide voltage for the sensor or the test strip, outputting test voltage according to test current passing through the sensor or the test strip; wherein the test voltage is converted into a blood glucose value of a blood sample in the sensor or the test strip by the single chip microcomputer.
4. The apparatus according to any one of claims 1 to 3, wherein the single-chip microcomputer is further configured to:
and after a test end instruction is received or the test current in the sensor or the test strip is not detected within a preset time length, automatically entering the low power consumption mode.
5. The apparatus of claim 2, wherein the first voltage unit comprises:
the non-inverting input end of the first operational amplifier is connected with one end of a first resistor; the other end of the first resistor receives the third voltage; the inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier; the power supply terminal of the first operational amplifier receives the second power supply signal.
6. The apparatus of claim 2, wherein the second voltage unit comprises:
a second operational amplifier having an inverting input terminal connected to the second electrode, wherein a non-inverting input terminal of the second operational amplifier is connected to one end of a second resistor, the other end of the second resistor receives the fourth voltage, and a power supply terminal of the second operational amplifier receives the second power supply signal;
one end of the third resistor is connected with the inverting input end of the second operational amplifier, and the other end of the third resistor is connected with the output end of the second operational amplifier;
and one end of the first capacitor is connected with the inverting input end of the second operational amplifier, and the other end of the first capacitor is connected with the output end of the second operational amplifier.
7. The apparatus of claim 2, wherein the power supply unit comprises:
the source electrode of the first PMOS tube receives a first power supply voltage, and the drain electrode of the first PMOS tube outputs a second power supply voltage;
one end of the fourth resistor is connected with the source electrode of the first PMOS tube, and the other end of the fourth resistor is connected with the grid electrode of the first PMOS tube;
and one end of the fifth resistor is connected with the grid electrode of the first PMOS tube, and the other end of the fifth resistor is connected with the third pin of the singlechip.
8. The apparatus of claim 2, wherein the grounding unit comprises:
the drain electrode of the first NMOS tube is grounded, and the source electrode of the first NMOS tube is respectively connected with the grounding ends of the electronic devices in the first voltage unit and the second voltage unit;
one end of the sixth resistor is connected with the source electrode of the first NMOS tube, and the other end of the sixth resistor is connected with the grid electrode of the first NMOS tube;
one end of the seventh resistor is connected with the grid electrode of the first NMOS tube, and the other end of the seventh resistor is connected with the fourth pin of the singlechip.
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