CN110554173B - Blood glucose meter device - Google Patents
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- CN110554173B CN110554173B CN201910900012.2A CN201910900012A CN110554173B CN 110554173 B CN110554173 B CN 110554173B CN 201910900012 A CN201910900012 A CN 201910900012A CN 110554173 B CN110554173 B CN 110554173B
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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, controlling the second pin to be in a high resistance state and controlling the third pin to be in an internal pull-up state in a low power consumption mode; the second pin is used for starting the single chip microcomputer when a falling edge is detected; or, the first pin is controlled to output a high level signal, the second pin is controlled to be in a high resistance state, and the third pin is controlled to output an internal pull-down state; the second pin is used for starting the singlechip when the rising edge is detected; a first electrode connected to the first pin for outputting a first voltage; the second electrode is connected with the second pin and used for outputting a second voltage; the first voltage and the second voltage are used for providing voltage for the sensor or the test strip; one end of the first resistor is connected with the third pin, and the other end of the first resistor is connected with the second electrode. In the application, when two electrodes for providing voltage for the sensor or the test strip are in contact with the sensor or the test strip, automatic starting can be realized.
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 provides 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, controlling a second pin of the single chip microcomputer to be in a high-resistance state and controlling a third 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, control a second pin of the single chip microcomputer to be in a high impedance state, and control a third pin of the single chip microcomputer to output 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 detect the blood sugar value in the sensor or the test strip when being 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 the sensor or the test strip;
and one end of the first resistor is connected with the third pin of the singlechip, and the other end of the first resistor is connected with the second electrode.
Optionally, in the above blood glucose meter device, the single chip microcomputer is further configured to:
after receiving a test starting instruction, controlling a fourth pin of the single chip microcomputer to output a low level signal and controlling a fifth 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 a 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 a 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 fourth pin of the single chip microcomputer, and is used for receiving a first power supply signal and a low level signal output by the fourth 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 fourth 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 fifth pin of the singlechip and is used for receiving a high level signal output by the fifth 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 fifth 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 second resistor; the other end of the second 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, a non-inverting input terminal of the second operational amplifier being connected to one end of a third resistor, the other end of the third resistor receiving the fourth voltage, and a power supply terminal of the second operational amplifier receiving the second power supply signal;
one end of the fourth resistor is connected with the inverting input end of the second operational amplifier, and the other end of the fourth 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 electrode of the first PMOS tube receives the first power supply voltage, and a drain electrode of the first PMOS tube outputs the second power supply voltage;
one end of the fifth resistor is connected with the source electrode of the first PMOS tube, and the other end of the fifth resistor is connected with the grid electrode of the first PMOS tube;
and one end of the sixth resistor is connected with the grid electrode of the first PMOS tube, and the other end of the sixth resistor is connected with a fourth pin of the singlechip.
Optionally, in the above blood glucose meter device, the grounding unit includes:
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 seventh resistor is connected with the source electrode of the first NMOS tube, and the other end of the seventh resistor is connected with the grid electrode of the first NMOS tube;
and one end of the eighth resistor is connected with the grid electrode of the first NMOS tube, and the other end of the eighth resistor is connected with a fifth pin of the singlechip.
According to the technical scheme, in the blood glucose meter equipment provided by the application, the single chip microcomputer controls the first pin of the single chip microcomputer to output a low level signal, controls the second pin of the single chip microcomputer to be in a high-resistance state and controls the third pin to output an internal pull-up state in a low power consumption mode. And the second pin is used for enabling the single chip microcomputer to be in a starting state when a falling edge is detected. Because the second pin is connected with the third pin through the first resistor, the second electrode outputs a high-level signal in a low power consumption mode. 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 contact with a sensor or a test strip, a resistor carried by the sensor or the test strip divides voltage with the first resistor, so that the voltage of the second electrode is reduced, a falling edge is generated, and the single chip microcomputer is started. Or, the singlechip controls the first pin of the singlechip to output a high-level signal, controls the second pin of the singlechip to be in a high-resistance state, and controls the third pin to be in an internal pull-down state in the low-power 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 second pin is connected with the third pin through the first resistor, so that the second electrode outputs a low-level signal in a low-power-consumption mode, and 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 contact with the sensor or the test strip, the resistor carried by the sensor or the test strip divides voltage with the first resistor, so that the voltage of the second electrode is increased, a rising edge is generated, and the single chip microcomputer is started. Because in this application, can realize automatic start-up when two electrodes that provide voltage for sensor or examination strip contact with sensor or examination strip, consequently need not to increase extra switchgear again and start blood glucose meter equipment, reduced the volume that blood glucose meter equipment occupy.
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 circuit diagram of a blood glucose meter device according to an embodiment of the present invention when the blood glucose meter device is connected to a test strip or a sensor;
FIG. 3 is a schematic circuit diagram of another alternative blood glucose meter device according to the present disclosure when connected to a test strip or sensor;
FIG. 4 is a schematic circuit diagram of another alternative blood glucose meter device according to the present disclosure when connected to a test strip or sensor;
FIG. 5 is a schematic diagram of another embodiment of a blood glucose meter device;
FIG. 6 is a schematic circuit diagram of a first voltage unit in a blood glucose meter device according to an embodiment of the present disclosure;
FIG. 7 is a schematic circuit diagram of a second voltage unit in a blood glucose meter device according to an embodiment of the present disclosure;
FIG. 8 is a schematic circuit diagram of a power supply unit in a blood glucose meter device according to an embodiment of the present disclosure;
fig. 9 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, the present application discloses a blood glucose meter device, comprising: singlechip, first electrode, second electrode and first resistance R1.
The singlechip is used for controlling a first pin P1 of the singlechip to output a low level signal, controlling a second pin P2 of the singlechip to be in a high impedance state and controlling a third pin P3 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, controlling the second pin P2 of the single chip microcomputer to be in a high impedance state, and controlling the third pin P3 of the single chip microcomputer to output an internal pull-down 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 rising edge is detected. The low power consumption mode is a mode that the singlechip only starts partial functions. When the single chip is in a starting state, the blood sugar value in the sensor or the test strip can be detected.
The singlechip can only keep the 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, the blood glucose meter cannot detect the blood glucose value in the sensor or the test strip. For the dynamic blood glucose meter equipment, when the dynamic blood glucose meter equipment is in a low power consumption mode, communication connection cannot be established between the dynamic blood glucose meter equipment and the control equipment, namely, the single chip microcomputer cannot broadcast signals, and further the single chip microcomputer cannot measure the blood glucose value under the control of the control equipment. For ordinary blood glucose meter equipment which does not belong to a dynamic blood glucose meter, a sensor or a test strip is not connected between the first electrode and the second electrode in a low power consumption mode, so that the blood glucose value cannot be detected. 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. And the control equipment can be electronic equipment 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 third pin P3 in the internal pull-up state means that the third pin P3 is configured inside the single chip microcomputer and is connected to a power supply signal through a pull-up resistor, so that the third pin outputs a high level signal. In the low power consumption mode, the third pin P3 is configured to be in an internal pull-down state, which means that the third pin P3 is configured inside the single chip microcomputer and is connected to a low voltage or ground through a pull-down resistor, so that the third pin P3 outputs a low-level signal. The control of the pin state of the singlechip by the singlechip is realized by a program written in the singlechip. 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 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.
One end of the first resistor R1 and one end of the first resistor R1 are connected with the third pin P3 of the single chip microcomputer, and the other end of the first resistor R1 is connected with the second electrode.
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 microcomputer 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, so that 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 microcomputer.
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 and connected with the third pin P3 through the first resistor R1.
If the first pin P1 is controlled by the single chip to output a low level, the second pin P2 is in a high-impedance state, and the third pin P3 is in an internal pull-up state in the low power consumption mode, the first electrode outputs a low level signal in the low power consumption mode, and the second electrode receives a high level signal transmitted by the third pin P3 through the first resistor R1 and is in a high level state. When a user wants to wake up the single chip microcomputer, that is, the single chip microcomputer enters a start state, the sensor or the test strip is only required to be in contact with the first electrode and the second electrode, and the sensor or the test strip is equivalent to a resistor RL with a large resistance value, so that referring to fig. 2, the high-level signal VCC output by the third pin P3, the first resistor R1, the second electrode, the resistor RL of the sensor or the test strip, and the first electrode (the output low level, which is equivalent to ground) are connected in series to form a circuit. And the voltage of the second electrode is pulled down to
And the second pin P2 of the single chip connected to the second electrode can start the single chip when detecting the falling edge, so that the single chip can enter a start state when the test strip or sensor is connected between the first electrode and the second electrode. In order to ensure that the second pin P2 can detect the falling edge, the resistance of the first resistor R1 can be increased, so that the voltage of the second electrode is pulled down to a lower voltage value.
Similarly, if in the low power consumption mode, the single chip controls the first pin P1 to output a high level, the second pin P2 is in a high-impedance state, and the third pin P3 is in an internal pull-down state, then the first electrode also outputs a high level signal in the low power consumption mode, and the second electrode receives a low level signal transmitted by the third pin P3 through the first resistor R1 and is in a low level state. When the user wants to wake up the single chip microcomputer, namely, the single chip microcomputer enters a starting state, the sensor or the test strip is only required to be connected between the first electrode and the second electrode, and the sensor or the test strip is equivalent to the sensor or the test stripA resistor RL with a larger resistance value, therefore, referring to fig. 3, the high level signal VCC outputted by the first electrode, the resistor RL of the sensor or test strip, the second electrode, the first resistor R1, and the third pin P3 (outputted low level, equivalent to ground) are connected in series to form a circuit. While the voltage of the second electrode is now pulled up to
And the second pin P2 of the single chip connected to the second electrode can start the single chip when detecting the rising edge, so that the single chip can enter a start state when the test strip or sensor is connected between the first electrode and the second electrode. In order to ensure that the rising edge is detected clearly on the second pin P2, the resistance of the first resistor R1 is increased, so that the voltage of the second electrode is pulled up to a higher voltage value.
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 present application, in the low power consumption mode, referring to fig. 4, when the sensor or the test strip is connected between the first electrode and the second electrode, the single chip microcomputer can be started, so that an additional switch device is not required to be added to start the single chip microcomputer, and the volume occupied by the blood glucose meter device is reduced. 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. 5, in a specific embodiment of the present application, the single chip microcomputer may be further configured to: after receiving the test start instruction, the fourth pin P4 of the control single chip outputs a low level signal, and the fifth pin P5 of the control single chip outputs a high level signal. Wherein, blood glucose meter equipment still includes: a first voltage unit 501, a second voltage unit 502, a power supply unit 503, and a ground unit 504.
If the blood glucose meter equipment is dynamic blood glucose meter equipment and can be controlled by the control equipment, the test starting instruction is an instruction sent to a single chip microcomputer in the dynamic blood glucose meter equipment by the control equipment. When the single chip microcomputer is in the low power consumption mode, referring to fig. 4, a user connects a sensor or a test strip between the first electrode and the second electrode, so that 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. If the blood glucose meter device is a common blood glucose meter device and cannot be controlled by the control device, when a user connects a sensor or a test strip between the first electrode and the second electrode, a single chip in the common blood glucose meter device receives a test start instruction, wherein the test start instruction is a falling edge signal or a rising edge signal detected by the second pin P2. Specifically, when the sensor or the test strip is connected between the first electrode and the second electrode, the second pin P2 of the single chip microcomputer receives a falling edge signal or a rising edge signal, so that the single chip microcomputer is in a starting state, and further, the blood glucose detection can be directly started.
After receiving the test start instruction, the single chip microcomputer in the blood glucose meter equipment controls a fourth pin P4 of the single chip microcomputer to output a low level signal and controls a fifth pin P5 of the single chip microcomputer 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, the fourth pin P4 and the fifth pin P5 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.
The first voltage unit 501 is connected to the first electrode, and is configured to receive a third voltage and a second power signal, and control 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. 6, in an embodiment of the present application, the first voltage unit includes:
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 second resistor R2. The other end of the second resistor R2 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. 6 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. 6 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 502 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 502 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 502 is further configured to:
the first voltage and the second voltage provide a voltage for the sensor or strip, and a test voltage is output according to 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 502 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. 7, 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 third resistor R3, the other terminal of the third resistor R3 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 fourth resistor R4, one end of a fourth resistor R4 is connected with the inverting input end of the second operational amplifier U2, and the other end of the fourth resistor R4 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. 7, 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. 7 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 503 is respectively connected to the first voltage unit 501, the second voltage unit 502 and the fourth pin P4 of the single chip, and is configured to receive the first power signal and the low level signal output by the fourth pin P4 of the single chip, and output the second power signal according to the first power signal and the low level signal output by the fourth pin P4 of the single chip.
Wherein the second power signal is used to power the first voltage unit 501 and the second voltage unit 502. 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 fourth pin P4 of the single chip microcomputer outputs a low level signal. When receiving the low level signal outputted from the fourth pin P4, the power unit 503 generates a second power signal according to the first power signal. Thereby enabling the first voltage unit 501 to control the first electrode to output the first voltage, and enabling the second voltage unit 502 to control the second electrode to output the second voltage. The power supply unit 503 only outputs the second power supply signal when receiving the low level signal output by the fourth pin P4, thereby ensuring that the first voltage unit 501 and the second voltage unit 502 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 503 does not output the second power supply signal, the first voltage unit 501 and the second voltage unit 502 are not in an operating state, and the power of the blood glucose meter is reduced.
Optionally, referring to fig. 8, 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 fifth resistor R5, a fifth resistor R5 is connected with the source electrode of the first PMOS transistor Q1, and the other end of the fifth resistor R5 is connected with the grid electrode of the first PMOS transistor Q1.
One end of a sixth resistor R6 and one end of a sixth resistor R6 are connected with the grid electrode of the first PMOS tube Q1, and the other end of the sixth resistor R6 is connected with a fourth pin P4 of the single chip microcomputer.
For the circuit shown in fig. 8, before the single chip microcomputer does not receive the test start instruction, the fourth pin P4 of the single chip microcomputer is controlled to be in a high impedance state, that is, the fourth 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 sixth resistor R6 and the fifth resistor R5. For example, the resistance of the sixth resistor R6 may be made much smaller than the resistance of the fifth resistor R5. 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 terminals of the first operational amplifier U1 shown in fig. 6 and the second operational amplifier U2 shown in fig. 7.
It should be noted that the embodiment shown in fig. 8 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 504 is connected to the first voltage unit 501, the second voltage unit 502 and the fifth pin P5 of the single chip microcomputer, and is configured to receive a high level signal output by the fifth pin P5 of the single chip microcomputer and control the electronic devices in the first voltage unit 501 and the second voltage unit 502 to be grounded according to the high level signal output by the fifth pin P5 of the single chip microcomputer.
Before the single chip microcomputer does not receive the test start instruction, the fifth pin P5 is controlled to be in a high impedance state or a low impedance state, and at this time, the grounding unit 504 does not receive the high impedance signal output by the fifth pin P5, so that the electronic devices in the first voltage unit 501 and the second voltage unit 502 cannot be controlled to be grounded. Therefore, the first voltage unit 501 and the second voltage unit 502 are not in working status, and the first electrode and the second electrode are not controlled to output voltage to pressurize the sensor or the test strip.
After the single chip microcomputer receives the test start command, the fifth pin P5 is controlled to output a high level signal, so that the grounding unit 504 controls the electronic devices in the first voltage unit 501 and the second voltage unit 502 to be grounded according to the high level signal output by the fifth pin P5 of the single chip microcomputer. In addition, after receiving the test start instruction, the single chip microcomputer also controls the fourth pin P4 to output a low level signal, so that the power supply unit 503 outputs a second power supply signal to supply power to the first voltage unit 501 and the second voltage unit 502. Therefore, the first voltage unit 501 and the second voltage unit 502 are controlled by the grounding unit 504 and the power supply unit 503, and the grounding unit 504 and the power supply unit 503 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 fourth pin P4 and the fifth pin P5.
Optionally, referring to fig. 9, in an embodiment of the present application, the grounding 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 seventh resistor R7, a seventh resistor R7 is connected with the source electrode of the first NMOS transistor Q2, and the other end of the seventh resistor R7 is connected with the grid electrode of the first NMOS transistor Q2.
One end of an eighth resistor R8 and one end of an eighth resistor R8 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 fifth pin P5 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 and second voltage cells, respectively, for example, the ground terminal AGND of the first operational amplifier U1 of the first voltage cell shown in fig. 6, and the ground terminal AGND of the second operational amplifier U2 of the second voltage cell shown in fig. 7.
When the single chip microcomputer does not receive a test start instruction, the fifth pin P5 is in a high-impedance state or a low-impedance 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 fifth pin P5 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 seventh resistor R7 and the eighth resistor R8, 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. 9 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.
If the glucose meter device is a dynamic glucose meter device, the device may be controlled by a control device. Therefore, the control equipment can send a test ending instruction to the single chip microcomputer to control the single chip microcomputer to enter a low power consumption mode. Or after the single chip microcomputer of the dynamic blood glucose meter device enters the on state, when the test current in the sensor or the test strip is not detected within the preset time length, the situation that the sensor or the test strip is not connected between the first electrode and the second electrode is indicated, and it can be considered that the user does not use the blood glucose meter device to detect the blood glucose value currently, so that the single chip microcomputer can automatically enter the low power consumption mode. Wherein, the duration can be set according to the actual situation. The length of time may be set short, for example, about 1 minute, in view of a factor of saving the amount of power of the blood glucose meter device, for example.
For the ordinary blood glucose meter, the ordinary blood glucose meter cannot be controlled by the control device, so that after the ordinary blood glucose meter enters the starting state and the test current in the sensor or the test strip is not detected within the preset time length, the user can be considered that the blood glucose meter device is not used for blood glucose value detection at present, and then the ordinary blood glucose meter automatically enters the low power consumption mode.
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 first pin of control singlechip exports low level signal, the second pin of control singlechip is the high resistance state and control the inside pull-up state of third pin output. And the second pin is used for enabling the single chip microcomputer to be in a starting state when a falling edge is detected. Because the second pin is connected with the third pin through the first resistor, the second electrode outputs a high-level signal in a low power consumption mode. 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 contact with a sensor or a test strip, a resistor carried by the sensor or the test strip divides voltage with the first resistor, so that the voltage of the second electrode is reduced, a falling edge is generated, and the single chip microcomputer is started. Or, the singlechip controls the first pin of the singlechip to output a high-level signal, controls the second pin of the singlechip to be in a high-resistance state, and controls the third pin to be in an internal pull-down state in the low-power 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 second pin is connected with the third pin through the first resistor, so that the second electrode outputs a low-level signal in a low-power-consumption mode, and 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 contact with the sensor or the test strip, the resistor carried by the sensor or the test strip divides voltage with the first resistor, so that the voltage of the second electrode is increased, a rising edge is generated, and the single chip microcomputer is started. Because in this application, can realize automatic start-up when two electrodes that provide voltage for sensor or examination strip contact with sensor or examination strip, consequently need not to increase extra switchgear again and start blood glucose meter equipment, reduced the volume that blood glucose meter equipment occupy.
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, controlling a second pin of the single chip microcomputer to be in a high-resistance state and controlling a third 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, control a second pin of the single chip microcomputer to be in a high impedance state, and control a third pin of the single chip microcomputer to output 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 detect the blood sugar value in the sensor or the test strip when being 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 the sensor or the test strip;
and one end of the first resistor is connected with the third pin of the singlechip, and the other end of the first resistor is connected with the second electrode.
2. The apparatus of claim 1, wherein the single-chip microcomputer is further configured to:
after receiving a test starting instruction, controlling a fourth pin of the single chip microcomputer to output a low level signal and controlling a fifth 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 a 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 a 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 fourth pin of the single chip microcomputer, and is used for receiving a first power supply signal and a low level signal output by the fourth 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 fourth 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 fifth pin of the singlechip and is used for receiving a high level signal output by the fifth 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 fifth 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 second resistor; the other end of the second 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, a non-inverting input terminal of the second operational amplifier being connected to one end of a third resistor, the other end of the third resistor receiving the fourth voltage, and a power supply terminal of the second operational amplifier receiving the second power supply signal;
one end of the fourth resistor is connected with the inverting input end of the second operational amplifier, and the other end of the fourth 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:
a source electrode of the first PMOS tube receives the first power supply voltage, and a drain electrode of the first PMOS tube outputs the second power supply voltage;
one end of the fifth resistor is connected with the source electrode of the first PMOS tube, and the other end of the fifth resistor is connected with the grid electrode of the first PMOS tube;
and one end of the sixth resistor is connected with the grid electrode of the first PMOS tube, and the other end of the sixth resistor is connected with a fourth 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 seventh resistor is connected with the source electrode of the first NMOS tube, and the other end of the seventh resistor is connected with the grid electrode of the first NMOS tube;
and one end of the eighth resistor is connected with the grid electrode of the first NMOS tube, and the other end of the eighth resistor is connected with a fifth pin of the singlechip.
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| CN107123383B (en) * | 2017-04-19 | 2023-03-24 | 昆山龙腾光电股份有限公司 | Voltage monitoring device |
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| CN202384240U (en) * | 2011-12-22 | 2012-08-15 | 美艾利尔（上海）诊断产品有限公司 | Liquid starter and detection equipment comprising same |
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