CN113054973A - Control method and circuit for startup and shutdown of glucometer - Google Patents
Control method and circuit for startup and shutdown of glucometer Download PDFInfo
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- CN113054973A CN113054973A CN202110332942.XA CN202110332942A CN113054973A CN 113054973 A CN113054973 A CN 113054973A CN 202110332942 A CN202110332942 A CN 202110332942A CN 113054973 A CN113054973 A CN 113054973A
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- reed switch
- resistor
- blood glucose
- glucose meter
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
Abstract
The invention discloses a method and a circuit for controlling the on-off of a glucometer, wherein a first electric signal is output by a magnetic reed switch circuit when an external magnetic field is close, the on-off circuit is cut off by the first electric signal, and the glucometer and a system control module are powered off, so that the electric quantity loss of glucometer products in the storage period is reduced, meanwhile, a second electric signal is output by the magnetic reed switch circuit when the external magnetic field is far away, the on-off circuit is switched on by the second electric signal, so that the glucometer and the system control module are powered on, a third electric signal is output when a test starting instruction is received after the system control module is powered on, and the on-off circuit is kept in a conducting state by the third electric signal, even if the external magnetic field is close to the magnetic reed switch circuit again, the on-off circuit can still keep in the conducting state under the control of the third electric signal, thereby avoiding the interference of external magnetic field in the test process.
Description
Technical Field
The invention relates to the technical field of glucometers, in particular to a method and a circuit for controlling the startup and shutdown of a glucometer.
Background
A blood glucose meter, also known as a blood glucose meter, is an electronic instrument that measures blood glucose levels. Due to the inherent characteristics of the existing dynamic blood glucose meter products, the products must be turned on and off by means of an external switch or short-circuit disconnection of external contacts. The main defects are as follows: the outer contact points need to be added, the power failure of the equipment is realized through the short contact points, the low power consumption is realized, the product volume is increased by increasing the contact points, and the risk of water inlet short circuit of the contact points is also increased.
In the prior art, part of blood glucose meter products directly control the on-off of a circuit by using a reed switch or externally trigger an activation device by using a magnetic control switch through a single chip microcomputer. However, the reed switch is adopted, so that the product is easily interfered by an external magnetic field in the using process, the power-off reset of the product is caused, and the normal use of the product is influenced; by adopting the external activation mode of the magnetic control switch, the magnetic control switch and the single chip microcomputer are required to be always in a low-power consumption state during the storage period, so that the storage time of the product is influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method and a circuit for controlling the on and off of a glucometer, which can reduce the electric quantity loss of glucometer products during the storage period and simultaneously avoid the interference of an external magnetic field in the test process.
The invention provides a control method for turning on and turning off a blood glucose meter, which is applied to a control circuit for turning on and turning off the blood glucose meter, wherein the control circuit for turning on and turning off the blood glucose meter comprises a magnetic reed switch circuit, a switching circuit and a system control module, and the method comprises the following steps:
the magnetic reed switch circuit judges whether an external magnetic field is close, and when the external magnetic field is close, the magnetic reed switch circuit outputs a first electric signal and sends the first electric signal to a control end of the switch circuit so as to enable the switch circuit to enter a cut-off state; when the switching circuit enters a cut-off state, the connection between a power supply and the blood glucose meter and the connection between the power supply and the system control module are disconnected, so that the blood glucose meter and the system control module are powered off;
when no external magnetic field approaches, the magnetic reed switch circuit outputs a second electric signal and sends the second electric signal to the control end of the switch circuit so as to enable the switch circuit to enter a conducting state; when the switching circuit enters a conducting state, the connection between the power supply and the blood glucose meter and the connection between the power supply and the system control module are switched on, so that the blood glucose meter and the system control module are electrified;
the system control module receives a control instruction after being electrified; when the control instruction is a test starting instruction, the system control module outputs a third electric signal, and the third electric signal enables the switching circuit to keep a conducting state;
and when the control instruction is an instruction for ending the test, the system control module shields the connection with the control end of the switch circuit.
Preferably, the reed switch circuit comprises a first resistor, a first reed switch and a first capacitor;
the first end of the first resistor is connected with the power supply, the second end of the first resistor is connected with a connection node between the control end of the switching circuit and the first end of the first reed switch, the second end of the first reed switch is grounded, and the first capacitor is connected with the first reed switch in parallel.
Preferably, the reed switch circuit comprises a second resistor, a second reed switch, a third resistor, a second capacitor and an NMOS transistor;
the first end of the second resistor and the first end of the second reed switch are both connected with the power supply, the second end of the first resistor is connected with a connection node between the control end of the switching circuit and the drain electrode of the NMOS transistor, the second end of the second reed switch is connected with the first end of the third resistor, the second end of the third resistor is connected with a connection node between the first end of the second capacitor and the grid electrode of the NMOS transistor, and the second end of the second capacitor and the source electrode of the NMOS transistor are both grounded.
Preferably, the power on/off circuit comprises a PMOS transistor;
the source electrode of the PMOS tube is used as the input end of the switch circuit, the drain electrode of the PMOS tube is used as the output end of the switch circuit, and the grid electrode of the PMOS tube is used as the control end of the switch circuit.
The invention provides a control circuit for turning on and turning off a glucometer, which comprises a magnetic reed switch circuit, a switching circuit and a system control module;
the magnetic reed switch circuit is used for judging whether an external magnetic field approaches, outputting a first electric signal when the external magnetic field approaches, and sending the first electric signal to a control end of the switch circuit so as to enable the switch circuit to enter a cut-off state; when no external magnetic field approaches, outputting a second electric signal, and sending the second electric signal to a control end of the switching circuit so as to enable the switching circuit to enter a conducting state;
the input end of the switching circuit is connected with a power supply, the output end of the switching circuit is respectively connected with the power supply end of the glucometer and the power supply end of the system control module, and the switching circuit is used for powering off the glucometer and the system control module when entering a cut-off state; the power-on and power-off circuit is also used for electrifying the blood glucose meter and the system control module when the blood glucose meter enters a conducting state;
the system control module is used for receiving a control instruction after being electrified, and outputting a third electric signal when the control instruction is a test starting instruction, wherein the third electric signal enables the switching circuit to keep a conducting state; and when the control instruction is an instruction for ending the test, shielding the connection with the control end of the switching circuit.
Preferably, the reed switch circuit comprises a first resistor, a first reed switch and a first capacitor;
the first end of the first resistor is connected with the power supply, the second end of the first resistor is connected with a connection node between the control end of the switching circuit and the first end of the first reed switch, the second end of the first reed switch is grounded, and the first capacitor is connected with the first reed switch in parallel.
Preferably, an IO end of the system control module is connected to a control end of the switching circuit.
Preferably, the reed switch circuit comprises a second resistor, a second reed switch, a third resistor, a second capacitor and an NMOS transistor;
the first end of the second resistor and the first end of the second reed switch are both connected with the power supply, the second end of the first resistor is connected with a connection node between the control end of the switching circuit and the drain electrode of the NMOS transistor, the second end of the second reed switch is connected with the first end of the third resistor, the second end of the third resistor is connected with a connection node between the first end of the second capacitor and the grid electrode of the NMOS transistor, and the second end of the second capacitor and the source electrode of the NMOS transistor are both grounded.
Preferably, the IO end of the system control module is connected to the gate of the NMOS transistor.
Preferably, the power on/off circuit comprises a PMOS transistor;
the source electrode of the PMOS tube is used as the input end of the switch circuit, the drain electrode of the PMOS tube is used as the output end of the switch circuit, and the grid electrode of the PMOS tube is used as the control end of the switch circuit.
The invention has at least the following beneficial effects:
according to the invention, the magnetic reed switch circuit outputs a first electric signal when an external magnetic field approaches, and the power-on and power-off circuit is cut off by using the first electric signal, so that the power of the glucometer and the system control module is cut off, and the electric quantity loss of glucometer products in the storage period is reduced; the second electric signal is output when the external magnetic field is far away through the magnetic reed switch circuit, the on-off circuit is conducted by utilizing the second electric signal, the glucometer and the system control module are further electrified, after the system control module is electrified, the third electric signal is output when a test starting instruction is received, the on-off circuit is kept in a conducting state by utilizing the third electric signal, even if the external magnetic field is close to the magnetic reed switch circuit, the on-off circuit can still keep the conducting state under the control of the third electric signal, the power supply of the glucometer product and the system control module is kept in a normally-on state, the interference of the external magnetic field in the test process is avoided, the connection between the shielding and the control end of the on-off circuit is shielded when the test ending instruction is received, the external magnetic field is close to the magnetic reed switch circuit again, and the glucometer and the system control module can be powered off again, compared with the prior art, the method can reduce the electric quantity loss of the glucometer products during the storage period, and can avoid the interference of an external magnetic field in the test process.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be 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 some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of a method for controlling the on/off of a blood glucose meter according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a control circuit for turning on and off a blood glucose meter according to an embodiment of the present invention;
fig. 3 is a circuit diagram of another control circuit for turning on and off a blood glucose meter according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a control method and a circuit for turning on and off a glucometer, which can cut off the power of the glucometer and a system control module during the storage of a glucometer product, and simultaneously make the power supplies of the glucometer product and the system control module in a normally-on state after the test is started, thereby reducing the electric quantity loss of the glucometer product during the storage and simultaneously avoiding the interference of an external magnetic field during the test.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
In one aspect, the present invention provides a method for controlling the power on and off of a blood glucose meter, which is applied to a control circuit for controlling the power on and off of the blood glucose meter, and please refer to fig. 1, the method includes:
s110, judging whether an external magnetic field approaches by the magnetic reed switch circuit, outputting a first electric signal by the magnetic reed switch circuit when the external magnetic field approaches, and sending the first electric signal to a control end of the switching circuit to enable the switching circuit to enter a cut-off state; when the switching circuit enters a cut-off state, the connection between the power supply and the blood glucose meter and the connection between the power supply and the system control module are disconnected, so that the blood glucose meter and the system control module are powered off.
S120, when no external magnetic field approaches, the magnetic reed switch circuit outputs a second electric signal and sends the second electric signal to a control end of the switch circuit so as to enable the switch circuit to enter a conducting state; when the switching circuit enters a conducting state, the connection between the power supply and the blood glucose meter and the connection between the power supply and the system control module are switched on, so that the blood glucose meter and the system control module are electrified.
Wherein, step S110 and step S120 are alternatively performed.
S130, the system control module receives a control instruction after being electrified; when the control instruction is a test starting instruction, the system control module outputs a third electric signal, and the third electric signal enables the switching circuit to keep a conducting state.
And S140, when the control instruction is the test ending instruction, the system control module shields the connection with the control end of the switch circuit.
Wherein, step S130 and step S140 are alternatively performed.
As can be seen from the above, in the embodiment of the present invention, the magnetic reed switch circuit outputs the first electrical signal when the external magnetic field approaches, and the power-on/off circuit is turned off by using the first electrical signal, so that the blood glucose meter and the system control module are powered off, thereby reducing the power consumption of the blood glucose meter product during the storage period; the second electric signal is output when the external magnetic field is far away through the magnetic reed switch circuit, the on-off circuit is conducted by utilizing the second electric signal, the glucometer and the system control module are further electrified, after the system control module is electrified, the third electric signal is output when a test starting instruction is received, the on-off circuit is kept in a conducting state by utilizing the third electric signal, even if the external magnetic field is close to the magnetic reed switch circuit, the on-off circuit can still keep the conducting state under the control of the third electric signal, the power supply of the glucometer product and the system control module is kept in a normally-on state, the interference of the external magnetic field in the test process is avoided, the connection between the shielding and the control end of the on-off circuit is shielded when the test ending instruction is received, the external magnetic field is close to the magnetic reed switch circuit again, and the glucometer and the system control module can be powered off again, compared with the prior art, the method can reduce the electric quantity loss of the glucometer products during the storage period, and can avoid the interference of an external magnetic field in the test process.
In order to specifically describe the method for controlling the on/off of the blood glucose meter according to the embodiment of the present invention, a control circuit for controlling the on/off of the blood glucose meter is specifically described below.
Referring to fig. 2 and 3, the power on/off control circuit of the blood glucose meter includes a reed switch circuit 110, a power on/off circuit 120, and a system control module 130.
The reed switch circuit 110 is configured to determine whether an external magnetic field is approaching, and when an external magnetic field is approaching, output a first electrical signal and send the first electrical signal to the control end of the on/off circuit 120, so that the on/off circuit 120 enters a cut-off state; when no external magnetic field approaches, outputting a second electrical signal, and sending the second electrical signal to the control end of the switching circuit 120, so that the switching circuit 120 enters a conducting state;
the input end of the on-off circuit 120 is connected with a power supply, the output end of the on-off circuit 120 is respectively connected with the power supply end of the blood glucose meter 140 and the power supply end of the system control module 130, and the on-off circuit 120 is used for powering off the blood glucose meter 140 and the system control module 130 when entering a cut-off state; the power-on/off circuit 120 is further configured to power on the blood glucose meter 140 and the system control module 130 when entering the conducting state;
the system control module 130 is configured to receive a control instruction after being powered on, and output a third electrical signal when the control instruction is a test start instruction, where the third electrical signal enables the power on/off circuit 120 to maintain a conducting state; when the control command is an end test command, the connection with the control terminal of the power on/off circuit 120 is shielded.
The external magnetic field may be generated by the permanent magnet, the first electrical signal may be a high-level signal or a low-level signal, the second electrical signal is a signal opposite to the first electrical signal, and the third electrical signal may also be a high-level signal or a low-level signal, the switching circuit 120 enters an off state under the control of the first electrical signal, enters an on state under the control of the second electrical signal, and remains the on state under the control of the third electrical signal.
Specifically, the power on/off circuit 120 includes a PMOS transistor Q1;
the source of the PMOS transistor Q1 is used as the input terminal of the switching circuit 120, the drain of the PMOS transistor Q1 is used as the output terminal of the switching circuit 120, and the gate of the PMOS transistor Q1 is used as the control terminal of the switching circuit 120.
In the embodiment of the present invention, the source of the PMOS transistor Q1 is connected to the power supply, the drain of the PMOS transistor Q1 is connected to the power supply terminal of the blood glucose meter 140 and the power supply terminal of the system control module 130, respectively, and when a high level signal is provided to the gate of the PMOS transistor Q1, the PMOS transistor Q1 enters a cut-off state, so that the blood glucose meter 140 and the system control module 130 are powered off; when a low signal is provided to the gate of the PMOS transistor Q1, the PMOS transistor Q1 enters a conducting state, and the blood glucose meter 140 and the system control module 130 are powered on. It is understood that, in the present embodiment, the first electrical signal is a high-level signal, and the second electrical signal is a low-level signal.
As shown in fig. 2, in some embodiments of the present invention, the reed switch circuit 110 includes a first resistor R1, a first reed switch G1, and a first capacitor C1;
the first end of the first resistor R1 is connected to the power supply, the second end of the first resistor R1 is connected to the connection node between the control end of the power on/off circuit 120 and the first end of the first reed switch G1, the second end of the first reed switch G1 is grounded, and the first capacitor C1 is connected in parallel with the first reed switch G1.
In the embodiment of the invention, the first reed switch G1 is a normally closed reed switch, when the external magnetic field approaches, the first reed switch G1 is in an off state, the second end of the first resistor R1 generates a high-level signal through the positive voltage of the power supply, and outputs the high-level signal to the gate of the PMOS transistor Q1, so that the PMOS transistor Q1 is cut off, and the blood glucose meter 140 and the system control module 130 are powered off; when the external magnetic field is far away, the first reed switch G1 is closed, the grid of the PMOS transistor Q1 is grounded through the first reed switch G1, the PMOS transistor Q1 is conducted, the blood glucose meter 140 and the system control module 130 are powered on, and the blood glucose meter 140 is started. In specific implementation, in order to further reduce power consumption, the first resistor R1 is a resistor with a resistance of 1M Ω or more.
Further, in the above embodiment, the IO terminal of the system control module 130 is connected to the control terminal of the power on/off circuit 120.
In the embodiment of the present invention, the system control module 130 includes a Microprocessor (MCU), a power supply terminal of the Microprocessor (MCU) is connected to the drain of the PMOS transistor Q1, and an IO terminal (P0.1) of the Microprocessor (MCU) is connected to the gate of the PMOS transistor Q1. When the Microprocessor (MCU) receives a test starting instruction, the program controls the IO end (P0.1) to output a low level signal to the grid electrode of the PMOS tube Q1, so that the PMOS tube Q1 is always in a conducting state, even if an external magnetic field is close to the first reed tube G1 to disconnect the first reed tube, the PMOS tube Q1 can still keep the conducting state under the control of the low level signal output by the IO end (P0.1) of the Microprocessor (MCU), and the power supplies of the glucometer 140 and the Microprocessor (MCU) are in a normal conducting state; when the Microprocessor (MCU) receives a test ending instruction, the program control IO end (P0.1) floats to be empty, the connection with the grid electrode of the PMOS tube Q1 is shielded, at the moment, the external magnetic field is close to the first reed switch G1 again to be disconnected, and the blood glucose meter 140 and the Microprocessor (MCU) can be powered off again. It is understood that, in the present embodiment, the third electrical signal is a low-level signal.
During specific implementation, a resistor R4 is connected in series between an IO end (P0.1) of a Microprocessor (MCU) and a grid electrode of a PMOS (P-channel metal oxide semiconductor) transistor Q1, and the resistor R4 plays a role in current-limiting protection of the IO end (P0.1) and forms RC (resistor-capacitor) filtering with a first capacitor C1, so that jitter is eliminated, and system false triggering caused by external interference is reduced. Meanwhile, in order to ensure that the PMOS transistor Q1 can be normally turned on, the resistance of the resistor R4 should be much smaller than that of the first resistor R1.
In other embodiments of the present invention, as shown in fig. 3, the reed switch circuit 110 includes a second resistor R2, a second reed switch G2, a third resistor R3, a second capacitor C2, and an NMOS transistor Q2;
the first end of the second resistor R2 and the first end of the second reed switch G2 are both connected to a power supply, the second end of the second resistor R2 is connected to the connection node between the control end of the power on/off circuit 120 and the drain of the NMOS transistor Q2, the second end of the second reed switch G2 is connected to the first end of the third resistor R3, the second end of the third resistor R3 is connected to the connection node between the first end of the second capacitor C2 and the gate of the NMOS transistor Q2, and the second end of the second capacitor C2 and the source of the NMOS transistor Q2 are both grounded.
In the embodiment of the invention, the second reed switch G2 is also a normally closed reed switch, when the external magnetic field is close, the second reed switch G2 is in an off state, and no high-level signal is input to the gate of the NMOS transistor Q2, so that the NMOS transistor Q2 is in an off state, and the second end of the second resistor R2 generates a high-level signal through the positive voltage of the power supply and outputs the high-level signal to the gate of the PMOS transistor Q1, so that the PMOS transistor Q1 is turned off, and the blood glucose meter 140 and the system control module 130 are powered off; when the external magnetic field is far away, the second reed switch G2 is closed, the gate of the NMOS transistor Q2 obtains a high level signal through the second end of the third resistor R3, so that the NMOS transistor Q2 is turned on, and at this time, the gate of the PMOS transistor Q1 is grounded through the NMOS transistor Q2, so that the PMOS transistor Q1 is turned on, so that the blood glucose meter 140 and the system control module 130 are powered on, and the blood glucose meter 140 is turned on.
Further, in the above embodiment, the IO terminal of the system control module 130 is connected to the gate of the NMOS transistor Q2.
In this embodiment, the system control module 130 includes a Microprocessor (MCU), a power supply terminal of the Microprocessor (MCU) is connected to the drain of the PMOS transistor Q1, and an IO terminal (P0.1) of the Microprocessor (MCU) is connected to the gate of the NMOS transistor Q2. When the Microprocessor (MCU) receives a test start command, the program controls the IO terminal (P0.1) to output a high level signal to the gate of the NMOS transistor Q2, so that the NMOS transistor Q2 is always in a conducting state, and further the PMOS transistor Q1 is also always in a conducting state, even if an external magnetic field approaches the second reed switch G2 to disconnect the transistor, the NMOS transistor Q2 and the PMOS transistor Q1 can still keep the conducting state under the control of the high level signal output from the IO terminal (P0.1) of the Microprocessor (MCU), so that the power supplies of the blood glucose meter 140 and the Microprocessor (MCU) are in a normally conducting state; when the Microprocessor (MCU) receives a test ending instruction, the program control IO end (P0.1) floats to be empty, the connection with the grid electrode of the NMOS tube Q2 is shielded, at the moment, the external magnetic field is close to the second reed switch G2 again to be disconnected, and the blood glucose meter 140 and the Microprocessor (MCU) can be powered off again. It is understood that, in the present embodiment, the third electrical signal is a high level signal.
In specific implementation, a resistor R5 is connected in series between an IO end (P0.1) of a Microprocessor (MCU) and a grid electrode of an NMOS tube Q2, and a resistor R5 and a third resistor R3 play a role in current-limiting protection of the IO end (P0.1) and respectively form RC filtering of two paths with a second capacitor C2, so that jitter is eliminated, and system false triggering caused by external interference is reduced.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It is further noted that, in the present specification, relational terms such as first and second, and the like are 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.
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.
Claims (10)
1. A control method for turning on and turning off a blood glucose meter is characterized by being applied to a control circuit for turning on and turning off the blood glucose meter, wherein the control circuit for turning on and turning off the blood glucose meter comprises a magnetic reed switch circuit, a switching circuit and a system control module, and the method comprises the following steps:
the magnetic reed switch circuit judges whether an external magnetic field is close, and when the external magnetic field is close, the magnetic reed switch circuit outputs a first electric signal and sends the first electric signal to a control end of the switch circuit so as to enable the switch circuit to enter a cut-off state; when the switching circuit enters a cut-off state, the connection between a power supply and the blood glucose meter and the connection between the power supply and the system control module are disconnected, so that the blood glucose meter and the system control module are powered off;
when no external magnetic field approaches, the magnetic reed switch circuit outputs a second electric signal and sends the second electric signal to the control end of the switch circuit so as to enable the switch circuit to enter a conducting state; when the switching circuit enters a conducting state, the connection between the power supply and the blood glucose meter and the connection between the power supply and the system control module are switched on, so that the blood glucose meter and the system control module are electrified;
the system control module receives a control instruction after being electrified; when the control instruction is a test starting instruction, the system control module outputs a third electric signal, and the third electric signal enables the switching circuit to keep a conducting state;
and when the control instruction is an instruction for ending the test, the system control module shields the connection with the control end of the switch circuit.
2. The method for controlling the on/off of a blood glucose meter of claim 1, wherein the reed switch circuit comprises a first resistor, a first reed switch and a first capacitor;
the first end of the first resistor is connected with the power supply, the second end of the first resistor is connected with a connection node between the control end of the switching circuit and the first end of the first reed switch, the second end of the first reed switch is grounded, and the first capacitor is connected with the first reed switch in parallel.
3. The method for controlling the on/off of a blood glucose meter of claim 1, wherein the reed switch circuit comprises a second resistor, a second reed switch, a third resistor, a second capacitor and an NMOS transistor;
the first end of the second resistor and the first end of the second reed switch are both connected with the power supply, the second end of the first resistor is connected with a connection node between the control end of the switching circuit and the drain electrode of the NMOS transistor, the second end of the second reed switch is connected with the first end of the third resistor, the second end of the third resistor is connected with a connection node between the first end of the second capacitor and the grid electrode of the NMOS transistor, and the second end of the second capacitor and the source electrode of the NMOS transistor are both grounded.
4. The method for controlling the on-off of a blood glucose meter according to any one of claims 1 to 3, wherein the on-off circuit comprises a PMOS tube;
the source electrode of the PMOS tube is used as the input end of the switch circuit, the drain electrode of the PMOS tube is used as the output end of the switch circuit, and the grid electrode of the PMOS tube is used as the control end of the switch circuit.
5. A control circuit for turning on and turning off a glucometer is characterized by comprising a magnetic reed switch circuit, a switching on and switching off circuit and a system control module;
the magnetic reed switch circuit is used for judging whether an external magnetic field approaches, outputting a first electric signal when the external magnetic field approaches, and sending the first electric signal to a control end of the switch circuit so as to enable the switch circuit to enter a cut-off state; when no external magnetic field approaches, outputting a second electric signal, and sending the second electric signal to a control end of the switching circuit so as to enable the switching circuit to enter a conducting state;
the input end of the switching circuit is connected with a power supply, the output end of the switching circuit is respectively connected with the power supply end of the glucometer and the power supply end of the system control module, and the switching circuit is used for powering off the glucometer and the system control module when entering a cut-off state; the power-on and power-off circuit is also used for electrifying the blood glucose meter and the system control module when the blood glucose meter enters a conducting state;
the system control module is used for receiving a control instruction after being electrified, and outputting a third electric signal when the control instruction is a test starting instruction, wherein the third electric signal enables the switching circuit to keep a conducting state; and when the control instruction is an instruction for ending the test, shielding the connection with the control end of the switching circuit.
6. The control circuit for turning on and off the blood glucose meter according to claim 5, wherein the reed switch circuit comprises a first resistor, a first reed switch and a first capacitor;
the first end of the first resistor is connected with the power supply, the second end of the first resistor is connected with a connection node between the control end of the switching circuit and the first end of the first reed switch, the second end of the first reed switch is grounded, and the first capacitor is connected with the first reed switch in parallel.
7. The control circuit for turning on and off the blood glucose meter according to claim 6, wherein an IO terminal of the system control module is connected to a control terminal of the on-off circuit.
8. The control circuit for turning on and off the blood glucose meter according to claim 5, wherein the magnetic reed switch circuit comprises a second resistor, a second reed switch, a third resistor, a second capacitor and an NMOS (N-channel metal oxide semiconductor) tube;
the first end of the second resistor and the first end of the second reed switch are both connected with the power supply, the second end of the first resistor is connected with a connection node between the control end of the switching circuit and the drain electrode of the NMOS transistor, the second end of the second reed switch is connected with the first end of the third resistor, the second end of the third resistor is connected with a connection node between the first end of the second capacitor and the grid electrode of the NMOS transistor, and the second end of the second capacitor and the source electrode of the NMOS transistor are both grounded.
9. The control circuit for turning on and off the blood glucose meter according to claim 8, wherein the IO terminal of the system control module is connected to the gate of the NMOS transistor.
10. The control circuit for turning on and off the blood glucose meter according to any one of claims 5 to 9, wherein the switching circuit comprises a PMOS transistor;
the source electrode of the PMOS tube is used as the input end of the switch circuit, the drain electrode of the PMOS tube is used as the output end of the switch circuit, and the grid electrode of the PMOS tube is used as the control end of the switch circuit.
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| CN202110332942.XA CN113054973B (en) | 2021-03-29 | 2021-03-29 | Control method and circuit for startup and shutdown of glucometer |
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|---|---|---|---|---|
| WO2023103647A1 (en) * | 2021-12-07 | 2023-06-15 | 上海微创生命科技有限公司 | Blood glucose monitoring circuit and medical device |
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| CN113054973B (en) | 2023-03-03 |
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