CN117555378A - Low-power-consumption circuit applied to electronic duty board and implementation method thereof - Google Patents
Low-power-consumption circuit applied to electronic duty board and implementation method thereof Download PDFInfo
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- CN117555378A CN117555378A CN202311523633.6A CN202311523633A CN117555378A CN 117555378 A CN117555378 A CN 117555378A CN 202311523633 A CN202311523633 A CN 202311523633A CN 117555378 A CN117555378 A CN 117555378A
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Classifications
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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
- H03K17/6871—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 the output circuit comprising more than one controlled field-effect transistor
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
Abstract
The application discloses a low-power-consumption circuit applied to an electronic duty board and an implementation method thereof. The circuit comprises the low-power-consumption circuit and at least comprises a control unit, a switch unit and a display unit; wherein the control unit is connected with the switch unit; the switching unit is connected with the display unit, wherein the switching unit includes: the device comprises a switch module, a sampling module and a charging module; the switch module is connected with the sampling module; the switch module is connected with the charging module; the sampling module is connected with the charging module in parallel. According to the circuit, the current of the sampling module is changed through the changed high and low levels, the target output of the sampling module is realized, the power consumption of the circuit can be reduced, and due to the existence of the charging module, the abrupt change of the circuit current can not be caused when the high and low levels of dynamic change are output, so that the components in the circuit can be protected, the service life of the product is prolonged, and the resource waste is reduced. The method and the device can be applied to the technical field of electronic circuits.
Description
Technical Field
The application relates to the field of electronic circuits, in particular to a low-power-consumption circuit applied to an electronic duty board and an implementation method thereof.
Background
In the main current circuit scheme in the prior art, the internal resistance of a battery of the electronic duty board can be increased along with the reduction of electric quantity, the instantaneous current is larger when a WIFI radio frequency circuit of the electronic duty board works, and the MCU is reset due to the fact that the power supply voltage is easily pulled down when the electric quantity is low; and the voltage sampling circuit of the electronic duty card has higher quiescent current, which leads to higher circuit power consumption, and the device of the circuit is easy to be damaged when the electronic duty card is opened because of higher instantaneous current. Accordingly, there still exists a technical problem in the related art that needs to be solved.
Disclosure of Invention
The object of the present application is to solve at least one of the technical problems existing in the prior art to a certain extent.
Therefore, an object of the embodiments of the present application is to provide a low-power circuit applied to an electronic duty board and an implementation method thereof.
In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the application comprises the following steps: the low-power-consumption circuit at least comprises a control unit, a switch unit and a display unit; the control unit is connected with the switch unit; the switching unit is connected with the display unit, wherein the switching unit includes: the device comprises a switch module, a sampling module and a charging module; the switch module is connected with the sampling module; the switch module is connected with the charging module; the sampling module with charge module parallel connection, this circuit can be through the high low level of regulation control module output dynamic change in different time, makes sampling module reach target voltage between the continuous charge-discharge of charging module, and this application changes sampling module's electric current through the high low level of change, realizes sampling module's target output, can reduce the consumption of circuit, owing to charging module's existence moreover, can not arouse circuit current's mutation when dynamic change's high low level output, can protect components and parts in the circuit, improves the life-span of product, reduces the wasting of resources.
In addition, the method for converting data based on the light emitting diode according to the above embodiment of the present invention may further have the following additional technical features:
further, in an embodiment of the present application, the switch module includes a first switch structure and a second switch structure; the first switch structure is connected with the second switch structure; the first switch structure is connected with the control unit; the second switch structure is connected with the sampling module. According to the embodiment of the application, the cut-off and the opening of the switch unit are realized through the two switch structures, the whole circuit can be opened and closed, meanwhile, the damage of surge current to devices is reduced, and the service life of the low-power-consumption circuit is prolonged.
Further, in an embodiment of the present application, the first switch structure includes a first switching device and a first voltage stabilizing device; the first switching device comprises an N-channel field effect transistor or an NPN triode; when the first switching device is an N-channel field effect transistor, the first end of the first voltage stabilizing device is connected with the grid electrode of the N-channel field effect transistor; the second end of the first voltage stabilizing device is connected with the source electrode of the N-channel field effect transistor; when the first switching device is an NPN triode, the first end of the first voltage stabilizing device is connected with the base electrode of the NPN triode; and the second end of the first voltage stabilizing device is connected with the emitter of the NPN triode.
Further, in the embodiment of the present application, the second switching structure includes a second switching device and a second voltage stabilizing device; the second switching device comprises a P-channel field effect transistor or a PNP triode; when the second switching device is a P-channel field effect transistor, the first end of the second voltage stabilizing device is connected with the grid electrode of the P-channel field effect transistor; the second end of the second voltage stabilizing device is connected with the source electrode of the P-channel field effect transistor; when the second switching device is a PNP triode, the first end of the second voltage stabilizing device is connected with the base electrode of the PNP triode; and the second end of the second voltage stabilizing device is connected with the emitter of the PNP triode.
Further, in an embodiment of the present application, the first voltage stabilizing device includes one or more of a resistor, an incandescent lamp, or a tungsten lamp. The embodiment can maintain the opening voltage of the first switching device at a fixed value through a plurality of combined resistive devices, can reduce the interference of electric signals and provide the accuracy of opening and closing control.
Further, in an embodiment of the present application, the charging module includes one or more electrolytic capacitors; when the charging module comprises more than two electrolytic capacitors, any two electrolytic capacitors are connected in series. According to the embodiment, the circuit charging process is realized through one electrolytic capacitor or a plurality of electrolytic capacitors, so that the problem that the sampling module is damaged due to the fact that the instantaneous current is too large when the switch module is turned on or turned off by the low-power-consumption circuit is avoided, and the service life of the circuit is prolonged.
Further, in an embodiment of the present application, the sampling module includes a first resistor and a second resistor; one end of the first resistor is connected with the switch module; the other end of the first resistor is connected with one end of the second resistor; the other end of the second resistor is grounded.
Further, in the embodiment of the present application, the ratio of the resistance values of the first resistor and the second resistor is 5:1. in this embodiment, the ratio of the resistance values of the first resistor to the second resistor is set to be 5:1, the output voltage of the sampling module can be collected by the MCU, and the feedback control of the MCU can be realized.
Further, in an embodiment of the present application, the circuit further includes a regulated power supply unit; the stabilized voltage supply unit is used for stabilizing the input voltage input into the control unit at a preset voltage. According to the embodiment, the voltage input into the MCU is stabilized to a certain threshold value by the voltage stabilizing power supply unit, so that the MCU can still work normally under the condition that power supply signal interference exists, and the stability of a circuit can be improved.
In addition, the application also provides a low-power-consumption circuit implementation method, which is implemented by the low-power-consumption circuit, and comprises the following steps: the control module outputs high level, the switch module is conducted, the charging module charges and the output voltage of the sampling module rises; determining that the charging time reaches a first preset threshold value, and adjusting the control module to output a low level so as to enable the charging module to discharge and the output voltage of the sampling module to drop; determining that the discharge time reaches a second preset threshold value, and adjusting the control module to output a high level; and returning to the execution step to determine that the charging time reaches a first preset threshold value, adjusting the output low level of the control module to enable the charging module to discharge, reducing the output voltage of the sampling module, determining that the discharging time reaches a second preset threshold value, and adjusting the output high level of the control module until the output voltage of the sampling module is the target voltage.
The advantages and benefits of the present application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present application.
According to the method, the dynamic change of the high-low level can be output in different time through the adjusting control module, the sampling module can reach the target voltage between the continuous charging and discharging of the charging module, the current of the sampling module is changed through the changing high-low level, the target output of the sampling module is realized, the power consumption of a circuit can be reduced, the circuit current mutation can not be caused when the dynamic change of the high-low level is output due to the existence of the charging module, the components in the circuit can be protected, the service life of a product is prolonged, and the resource waste is reduced.
Drawings
FIG. 1 is a schematic diagram of a low power circuit applied to an electronic duty card in one embodiment of the present invention;
FIG. 2 is a schematic block diagram of a switch unit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a low power circuit applied to an electronic duty card in another embodiment of the present invention;
FIG. 4 is a schematic diagram of a low power circuit applied to an electronic duty card according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a low power circuit applied to an electronic duty card in another embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating steps of a method for implementing a low power circuit according to another embodiment of the present invention;
FIG. 7 is a schematic diagram of a low power circuit applied to an electronic duty card in another embodiment of the present invention;
FIG. 8 is a flow chart of a process for implementing an electronic duty card function in one embodiment of the invention;
FIG. 9 is a diagram of the content of an electronic shift card in one embodiment of the invention;
FIG. 10 is a schematic diagram of a system deployment of electronic duty cards in an embodiment of the present invention.
Detailed Description
The following describes the principle and the process of the low power consumption circuit applied to the electronic duty card and the implementation method thereof in the embodiment of the invention in detail by referring to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic block diagram of a low-power circuit applied to an electronic duty board according to an embodiment of the present application. In fig. 1, the low power consumption circuit applied to the electronic duty card may include, but is not limited to, a control unit 1, a switching unit 2, and a display unit 3. The control unit can be connected with the switch unit; the switching unit may be connected with the display unit. The control unit 1 may include a WIFI module, an MCU, and peripheral circuits thereof. The WIFI module can be connected with the MCU module, and the external system can control the output of MCU through the WIFI module. The MCU itself has a clock module which can control the display unit to be periodically lightened. The display unit may include a display driving module and a display, where the display may be a new display that is currently available or has not yet been developed, such as TFT, LCD, OLED. And the structure of the switching unit 2 may refer to fig. 2. In fig. 2, the switching unit may include a switching module 21, a sampling module 22, and a charging module 23. The switch module 21 may be connected with the sampling module 22; the switch module 21 may be connected with the charging module 23; the sampling module 22 is connected in parallel with the charging module 23. The switch unit 2 can receive the high-low level from the control unit 1, the switch module 21 inside the switch unit 2 can realize the self-opening and the self-closing according to the high-low level, and when the switch module 21 is opened or closed, the sampling module 22 can sample the voltage of the self-internal resistor and output the corresponding voltage. Meanwhile, the charging module 23 can perform corresponding charging and discharging according to the high and low levels, and the control unit 1 can perform electrical parameter acquisition on the circuit according to the voltage output by the sampling module 22.
Further, in some possible embodiments of the present application, referring to fig. 3, the switch module may include a first switch structure 211 and a second switch structure 212. The first switch structure 211 may be connected with the second switch structure 212; the first switching structure 211 may be connected with the control unit 1; the second switch structure 212 may be connected with the sampling module 22. It is to be understood that the first switching structure 211 may be a device capable of implementing a switching function, such as a knife switch, a relay, etc., or may be a circuit capable of implementing a switching function, such as a triode common base amplifying circuit, a field effect transistor common gate amplifying circuit, or a common drain amplifying circuit of an effect transistor, etc., which all have components such as a switching device and a resistor capacitor, etc., and the second switching structure 212 may be a device capable of implementing a switching function, such as a knife switch or a relay, etc., or may be a circuit capable of implementing a switching function, such as a triode common base amplifying circuit, a field effect transistor common gate amplifying circuit, or a common drain amplifying circuit of an effect transistor, etc., which all have components such as a switching device and a resistor capacitor, etc.
According to the embodiment, the switching unit is turned off and turned on through the two switch structures, so that the whole circuit can be turned on and off, meanwhile, damage of surge current to devices is reduced, and the service life of a low-power-consumption circuit is prolonged.
Further, in some possible embodiments of the present application, referring to fig. 3, the first switching structure may include a first switching device Q1 and a first voltage stabilizing device R2. The first switching device may include an N-channel field effect transistor or an NPN transistor. One end of the first switch structure is connected with the ground wire, and the other end of the first switch structure is connected with the second switch structure. When the first switching device is an N-channel field effect transistor, the first end of the first voltage stabilizing device is connected with the grid electrode of the N-channel field effect transistor; the second end of the first voltage stabilizing device can be connected with the source electrode of the N-channel field effect transistor; when the first switching device is an NPN triode, the first end of the first voltage stabilizing device can be connected with the base electrode of the NPN triode; the second end of the first voltage stabilizing device may be connected to an emitter of the NPN transistor.
Further, in some possible embodiments of the present application, the first voltage stabilizing device may comprise one or more combinations of resistors, incandescent lamps, or tungsten lamps. That is, the first voltage stabilizing device may be a resistor, an incandescent lamp, a tungsten filament lamp, two or more resistors connected in series, two or more resistors connected in parallel, two or more incandescent lamps connected in series, two or more tungsten filament lamps connected in parallel, a combination of a resistor and an incandescent lamp, two or more tungsten filament lamps connected in parallel, or three devices connected in parallel. It will be appreciated that the first voltage stabilizing device may be a resistive device, also known as a resistive load. A resistive load is defined as a load that is a resistive load, i.e. a purely resistive load acting only through a resistive component, referred to as a resistive load, when compared to a power supply, without a phase difference between the load current and the load voltage, in short, the relation between the current and the voltage of the resistive load obeys the basic ohm's law i=u/R. The first voltage stabilizing device is arranged between the source electrode and the grid electrode of the field effect tube, can stabilize the voltage between the source electrode and the grid electrode of the field effect tube, can smoothly conduct the field effect tube, and can smoothly start a circuit; the first voltage stabilizing device is arranged between the base electrode and the emitter electrode of the NPN triode, can stabilize the voltage between the base electrode and the emitter electrode of the triode, can smoothly conduct the triode, and enables the circuit to be smoothly started.
Further, in some possible embodiments of the present application, referring to fig. 3, the second switching structure may include a second switching device U1 and a second voltage stabilizing device R3; the second switching device may include a P-channel field effect transistor or a PNP transistor. One end of the second switch structure is connected with the power supply VCC, and the other end of the second switch structure is connected with the first switch structure. When the second switching device is a P-channel field effect transistor, the first end of the second voltage stabilizing device can be connected with the grid electrode of the P-channel field effect transistor; the second end of the second voltage stabilizing device is connected with the drain electrode of the P-channel field effect transistor; when the second switching device is a PNP triode, the first end of the second voltage stabilizing device is connected with the base electrode of the PNP triode; the second end of the second voltage stabilizing device is connected with the collector electrode of the PNP triode.
Further, in some possible embodiments of the present application, the second voltage stabilizing device may also comprise one or more combinations of resistors, incandescent lamps, or tungsten lamps. That is, the second voltage stabilizing device may be a resistor, an incandescent lamp, a tungsten filament lamp, two or more resistors connected in series, two or more resistors connected in parallel, two or more incandescent lamps connected in series, two or more tungsten filament lamps connected in parallel, a combination of a resistor and an incandescent lamp, two or more tungsten filament lamps connected in parallel, or three devices connected in parallel. It can be understood that the second voltage stabilizing device is arranged in parallel between the source electrode and the grid electrode of the field effect tube, so that the voltage between the source electrode and the grid electrode of the field effect tube can be stabilized, the field effect tube can be smoothly conducted, and the circuit can be smoothly started; the second voltage stabilizing device is arranged between the base electrode and the emitter electrode of the PNP triode, can stabilize the voltage between the base electrode and the emitter electrode of the triode, can smoothly conduct the triode, and enables the circuit to be smoothly started.
The embodiment can maintain the opening voltage of the first switching device at a fixed value through a plurality of combined resistive devices, can reduce the interference of electric signals and provide the accuracy of opening and closing control.
Further, in some possible embodiments of the present application, the charging module may include one or more electrolytic capacitors; when the charging module is an electrolytic capacitor, the anode of the electrolytic capacitor is connected with a power supply; when the charging module comprises more than two electrolytic capacitors, any two electrolytic capacitors are connected in series; when the two electrolytic capacitors are connected in series, the positive electrode of the first electrolytic capacitor can be connected with a power supply, and the negative electrode of the second electrolytic capacitor can be connected with ground; the anode of the second electrolytic capacitor can be connected with the cathode of the first electrolytic capacitor. It can be understood that the switch module receives the high level signal of the control module, and the circuit is turned on, so that the electrolytic capacitor can be charged and the electric quantity can be stored.
According to the embodiment, the circuit charging process is realized through one electrolytic capacitor or a plurality of electrolytic capacitors, so that the problem that the sampling module is damaged due to the fact that the instantaneous current is too large when the switch module is turned on or turned off by the low-power-consumption circuit is avoided, and the service life of the circuit is prolonged.
Further, in some possible embodiments of the present application, referring to fig. 3, the sampling module may include a first resistor R4 and a second resistor R5; one end of the first resistor R4 may be connected to one end of the second switching device of the switching module; the other end of the first resistor R4 can be connected with one end of the second resistor R5; the other end of the second resistor R5 may be connected to ground, wherein the other end of the first resistor R4 serves as the output of the sampling module.
Further, in some possible embodiments of the present application, the ratio of the resistance values of the first resistor to the second resistor is 5:1. the ratio of the resistance values of the first resistor to the second resistor is 5:1, the output voltage of the sampling module is the partial voltage of the second resistor in the circuit, if the switching module is conducted, the partial voltage can be captured by the MCU in the control module, and whether the switching module is conducted can be judged by the partial voltage. For example, when the resistance of the first resistor is 10kΩ, the resistance of the second resistor is 2kΩ, and when the switch module is in the on state, the voltage division ratio of the first resistor to the second resistor is 5:1, if the power VCC is 5V at this time, the voltage at the other end of the first resistor is about 5/6V at this time, that is, the voltage output of the sampling module is 5/6V. It can be understood that the ratio of the resistance values of the first resistor to the second resistor is 5:1 may also be realized by an adjustable resistor, specifically, the first resistor may be an adjustable resistor, and the second resistor is a resistor with a fixed resistance value, and by adjusting the specific resistance value of the first resistor, the resistance value ratio between the first resistor and the second resistor may reach 5:1. similarly, the second resistor may be an adjustable resistor, and the first resistor is a resistor with a fixed resistance, and by adjusting the specific resistance of the second resistor, the resistance ratio between the first resistor and the second resistor can reach 5:1. in addition, the first resistor and the second resistor can be adjustable resistors, and the specific resistance values of the first resistor and the second resistor can be adjusted simultaneously to achieve a resistance value ratio between the first resistor and the second resistor of 5:1.
Further, in some possible embodiments of the present application, the circuit may further include a regulated power supply unit; the regulated power supply unit may use a ground line in combination with the control unit and the switching unit. The regulated power supply unit may be configured to stabilize an input voltage of the input control unit at a preset voltage. The preset voltage may be 3.3V or 5V, and the specific voltage value may be determined according to the type of the MCU used by the control module. For example, referring to fig. 4, the regulated power supply unit may include a regulated chip U2, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4, wherein the VIN pin of the regulated chip U2 may be connected to a power supply, and the VIN pin and the CE pin of the regulated chip U2 may be connected to a first end of the second capacitor C2. The other end of the second capacitor C2 may be connected to ground. One end of the third capacitor C3 and the fourth capacitor C4 after being connected in parallel can be connected with the VOUT pin of the voltage stabilizing chip U2, and the other end of the third capacitor C3 and the fourth capacitor C4 after being connected in parallel can be connected with ground. VOUT pin may be connected to a power interface J4 of the control module. It can be understood that the second capacitor C2 may be used as a filter capacitor, and is used for filtering the ac signal input to the VIN pin of the voltage stabilizing chip U2 or other signals interfering with the VCC power supply, so that the voltage stabilizing chip U2 may receive the 5V electrical signal without interfering signals. The third capacitor C3 and the fourth capacitor C4 may also be used as filter capacitors, which are used to make the electric signal of the VOUT pin of the voltage stabilizing chip U2 be a stable 3.3V dc signal.
According to the embodiment, the voltage input into the MCU is stabilized to a certain threshold value by the voltage stabilizing power supply unit, so that the MCU can still normally work under the condition that power supply signal interference exists, and the stability of a circuit can be improved.
Further, in some possible embodiments of the present application, the circuit may further include a rectifier diode. The rectifier diode may be disposed at an output terminal of the switching unit. For example, referring to fig. 5, in fig. 5, an anode of a rectifying diode may be connected to an anode of an electrolytic capacitor, and a cathode of the diode may be connected to an input interface J3 of the display unit. It is understood that the rectifier diodes may be of the type IN4148, IN4001, IN4007, 70HF80, MRA4003T3G, 1SS355, 6a10, and B5G090L, wherein IN4148 may be mounted as a patch or plug-IN diode, and is characterized as suitable for high power rectification. While IN4007 or IN4001 may be mounted IN-line. The IN4007 or IN4001 is characterized by rectification suitable for low power or low frequency circuits. The 70HF80 can be installed in a straight screw type, and is characterized by being suitable for rectification of high-power or high-frequency circuits. The MRA4003T3G may be mounted in a patch. The mounting mode of the 1SS355 can be patch mounting, and is characterized by being suitable for rectification of a high-power circuit. The mounting mode of 6a10 may be in-line mounting. 6A10 is suitable for rectification of high power circuits. The installation mode of the 2DHG can be direct-insertion installation, and is characterized by being suitable for rectification of a high-power circuit. The installation mode of the B5G090L can be direct insertion installation, and is characterized by being suitable for rectification of a low-power circuit or an ultrahigh-frequency circuit.
In addition, referring to fig. 6, the application further provides a low-power-consumption circuit implementation method. The method can be realized through the low-power-consumption circuit applied to the electronic duty card. The method may include, but is not limited to, steps S101-S104.
S101, the control module outputs high level, the switch module is conducted, the charging module charges, and the output voltage of the sampling module rises.
It is understood that the control module may include an MCU, and that the control module outputting the high level may be implemented by running a program built in the MCU. And the switch module can be configured to be high-level on and low-level off, and when the control module outputs high level.
In some possible embodiments of the present application, the control module outputs a high level after running the program stored in the control module, at this time, the switch module is turned on, and after the switch module is turned on, the charging module charges, at this time, since the sampling module is connected in parallel with the charging module, the output voltage of the sampling module also increases gradually.
S102, determining that the charging time reaches a first preset threshold, and adjusting the control module to output a low level so as to enable the charging module to discharge and the output voltage of the sampling module to drop.
It will be appreciated that the first predetermined threshold is a time threshold. When the control module outputs a periodic high-low level signal, such as a PWM wave or a square wave, the first time threshold may be a time corresponding to a half period of the PWM wave or the square wave.
In some possible embodiments of the present application, after the control module runs the program, it determines that the charging time reaches the first preset threshold, and may adjust the output low level. After the low level is output, the switch module is not conducted, the charging module discharges and the output voltage of the sampling module drops.
S103, determining that the discharge time reaches a second preset threshold value, and adjusting the control module to output a high level.
It will be appreciated that the second predetermined threshold is a time threshold. When the control module outputs a signal with a periodic high level and a periodic low level, such as a PWM wave or a square wave, the second time threshold may be a time corresponding to a half period of the PWM wave or the square wave.
In some possible embodiments of the present application, after the control module runs the program, it determines that the discharge time reaches the second preset threshold, and may adjust the output high level. After the high level is output, the switch module is not conducted, the charging module charges and the output voltage of the sampling module is improved.
It should be noted that, since the discharging capability of the electrolytic capacitor is smaller than the power supply capability of the power supply, the discharging amount of the electrolytic capacitor is smaller than the charging amount of the power supply for charging the electrolytic capacitor in the period when the switch module is turned on. After the electrolytic capacitor is charged and discharged once, the stored electric quantity is still in a rising state.
S104, returning to the execution step to determine that the charging time reaches a first preset threshold, adjusting the control module to output a low level so that the charging module discharges and the output voltage of the sampling module drops, and determining that the discharging time reaches a second preset threshold, adjusting the control module to output a high level until the output voltage of the sampling module is a target voltage.
It can be understood that the target voltage may be the maximum voltage that can be achieved by the sampling module connected in parallel with the electrolytic capacitor after the voltage at the two ends of the electrolytic capacitor reaches the maximum value, and the specific value of the maximum voltage may be determined by the direct resistance ratio of the two resistors connected in series with each other in the sampling module and the specific value of the power VCC input to the sampling module. Illustratively, the voltage of VCC is 12V, and the resistance ratio of the two resistors connected in series is 5kΩ for the first resistor and 1kΩ for the second resistor, with a maximum voltage of 12/(5+1) =2v.
In some possible embodiments of the present application, the control module may determine that the charging time reaches the first preset threshold by running the internal program to return to the execution step, adjust the control module to output a low level to enable the charging module to perform discharging and the output voltage of the sampling module to drop, and determine that the discharging time reaches the second preset threshold, adjust the control module to output a high level until the output voltage of the sampling module is the target voltage. That is, the charging and discharging processes of the electrolytic capacitor are repeated to charge the electrolytic capacitor until the electrolytic capacitor outputs a fixed maximum voltage, and after the two ends of the electrolytic capacitor are at the fixed voltage, the output voltage of the sampling module is determined as the target voltage.
It should be noted that, the control module determines that the charging time reaches the first preset threshold value by running the internal program and returning to the execution step each time, adjusts the control module to output a low level so that the charging module discharges and the output voltage of the sampling module decreases, and determines that the discharging time reaches the second preset threshold value, and after the control module outputs a high level, the voltage at both ends of the electrolytic capacitor is increased compared with the voltage of the electrolytic capacitor before executing the above steps.
The control module determines that the charging time reaches the first preset threshold by running the internal program execution step, adjusts the output low level of the control module to enable the charging module to discharge and the voltage of the output voltage of the sampling module to drop, the voltage of the electrolytic capacitor can drop from original 4.2V to 3.5V, at this time, the control module executes the step to determine that the discharging time reaches the second preset threshold, adjusts the output high level of the control module, and after the control module outputs the high level, the electrolytic capacitor can continue to be charged from 3.5V, and the voltage of the two ends of the electrolytic capacitor can be charged to 4.9V within the preset first time threshold. In general, the voltage across the electrolytic capacitor can be increased from 4.5V to 4.9V after the above steps.
In addition, the application also provides a control system applied to the electronic duty card. The system can comprise the low-power circuit and the WIFI module which are applied to the electronic duty card. The WIFI module can be connected with the control unit of the low-power-consumption circuit.
The content of the low-power-consumption circuit embodiment is applicable to the control system embodiment, and the functions specifically realized by the control system embodiment are the same as those of the low-power-consumption circuit embodiment, and the achieved beneficial effects are the same as those of the low-power-consumption circuit embodiment.
The following describes the specific implementation principle of the present application with reference to the drawings:
first, the structure and implementation principle of the low power consumption circuit of the present application are described.
Referring to fig. 7, in fig. 7, an input VCC of the voltage stabilizing module is 5V, an output VCC is 3.3V, a J4 port is connected to a power port of the control module, the voltage stabilizing module supplies power to the control module through J4, a J1 port is connected to an output port of the control module, the output port can output high and low levels, the J3 port is connected to a display unit, the display unit can be an electronic ink screen, and the J2 port is connected to the control unit. The voltage stabilizing chip is U2, the second capacitor is C2, the third capacitor is C3, the fourth capacitor is C4, the first switching device is Q1, Q1 is an N-channel enhanced field effect transistor, the second switching device is a field effect transistor U1, Q1 is a P-channel enhanced field effect transistor, the first voltage stabilizing device is a resistor R2, the second voltage stabilizing device is a resistor R3, the first resistor is R4, the second resistor is R5, the charging module is an electrolytic capacitor C1, the anode of the diode D1 is connected with one end connected with the U1, the cathode of the diode D1 is used as the output end of the switching unit, and the output end is connected with the display unit. The Q1 and the U1 of this embodiment adopt field effect transistors, and compared with the triode, the field effect transistor is a voltage control type device, and can realize the circulation and cut-off of current and voltage in an extremely short time, reduce the action time of the switching device, and make the control more accurate. And because the field effect transistor is a voltage control type device, the resistance between the grid electrode and the source electrode is very large, and the reverse current can be reduced by adopting the field effect transistor, and the surge current is damaged on the device on the circuit.
In fig. 7, the voltage stabilizing unit may include a voltage stabilizing chip U2, a non-polar capacitor C3, and a non-polar capacitor C4. The output end VOUT of the voltage stabilizing chip U2 is connected with J4, the input end VIN and the CE end of the voltage stabilizing chip U2 are connected with a power supply VCC, and the VSS end of the voltage stabilizing chip U2 is grounded. One end of the nonpolar capacitor C3 and one end of the nonpolar capacitor C4 which are connected in parallel are connected to VOUT, the other end of the nonpolar capacitor C2 which is connected in parallel is grounded, and the other end of the nonpolar capacitor C2 is connected with the VIN end and the CE end. One end of R2 is connected with the control module through J1, and the other end of R2 is grounded. The output end of the voltage stabilizing chip U2 can output 3.3V.
The switching unit may include a power supply VCC, an electrolytic capacitor C1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a field effect transistor Q1, a field effect transistor U1, and a rectifying diode D1. One end of the resistor R2 and the gate of the field effect transistor Q1 may be connected to the J1 end. The other end of the resistor R2 is grounded. One end of the resistor R3 and the source of the fet U1 may be connected to the power supply VCC. The drain electrode of the field effect transistor Q1 and the other end of the resistor R3 can be connected with the grid electrode of the field effect transistor U1. The source of the field effect transistor Q1 is grounded. One end of the resistor R4 may be connected to the drain of the field effect transistor U1. The other end of the resistor R4 may be connected to one end of the resistor R5. The other end of resistor R5 may be grounded. One end of the resistor R5 may be connected to the J2 port as an output of the sampling module. The positive electrode of the electrolytic capacitor C1 can be connected with the drain electrode of the field effect transistor U1, and the negative electrode of the electrolytic capacitor C1 can be grounded. The drain electrode of the field effect tube U1, the anode of the electrolytic capacitor C1 and one end of the resistor R4 are connected as output ends and connected with the rectifying diode D1, and the cathode of the rectifying diode D1 is used as the output of the switching unit.
When the MCU of the control module is in a dormant state, the J1 end is in a high resistance state, at the moment, VG=VS of the field effect transistor Q1, the Q1 is in a cut-off state, and the S pole and the D pole are disconnected. VG=VS of the field effect tube U1, U1 is in a cut-off state, the S pole and the D pole are disconnected, the sampling circuit is not conducted, no current exists in the circuit, no voltage exists at two ends of the electrolytic capacitor C1, leakage current cannot be generated, the current supply voltage of the J3 end to the electronic ink screen is zero, and the whole circuit is in a low-power consumption state. When the MCU is in an awakened state, the MCU outputs a PWM signal, the PWM signal is a signal with a period of high level and a period of low level, the terminal line J1 is input with a high level, at the moment, VG > VS of Q1, the S pole and D pole of Q1 are conducted, VG < VS of U1, the S pole and D pole of U1 are conducted, the electrolytic capacitor is charged, the voltage J2 is Vcc of 1/6, vcc of 1/6 is in the conversion range of the MCU, the voltage J3 is the difference between Vcc and the forward voltage drop of the finishing diode D1, and the difference can supply power for the ink screen driving circuit. Because the current is larger when the voltage of the large capacitor C1 is changed, the circuit is easily influenced, the switching speeds of Q1 and U1 are faster, so that the high-frequency PWN signal is output by matching with the MCU, the large capacitor is charged by smaller current, J1 keeps high level in the period from the completion of charging to the operation of the system, and the energy storage filtering is provided for the working of the radio frequency circuit by utilizing the bidirectional conduction characteristics of the S pole and the D pole of the U1, so that the equivalent internal resistance of the battery is reduced.
Secondly, the implementation process of software and hardware of the electronic duty card is described, and the process comprises steps 1.1-1.7.
1.1 designing Low Power Circuit and matching Programming
The adoption battery of the electronic duty board, battery power supply scene is higher to the requirement of low-power consumption, and current mainstream scheme has following defect: LOD transient response of low quiescent current is poor, and the radio frequency circuit has higher requirements on power supply transient response; the internal resistance of the battery can be increased along with the reduction of the electric quantity, the instantaneous current is larger when the WIFI radio frequency circuit works, and the MCU is reset due to the fact that the power supply voltage is easily pulled down when the electric quantity is low; the circuit needs a large capacitor to stabilize the power supply voltage and inhibit the power supply ripple, but the large capacitor in the prior art is mostly an electrolytic capacitor, a tantalum capacitor and the like, so that the leakage current of the capacitor is larger, and the static current is higher; a voltage sampling circuit is needed to enable a voltage range to be in accordance with an ADC range of the MCU for measuring the battery voltage to estimate the current battery electric quantity, but the quiescent current of the voltage sampling circuit is higher; in order to reduce the power consumption of the large-capacitance and battery voltage circuit, the circuit needs to be designed to enable the partial circuit to be connected in according to the requirement, but the instant current for connecting the large-capacitance is extremely large, and the power supply voltage is easily pulled down to cause MCU reset. In order to solve the contradiction, a set of solution of combining software and hardware is designed at present: the hardware circuit can refer to the circuit shown in fig. 7, and the software end designs a PWM capacitor charging scheme, so that the power supply impact is reduced by using a step-by-step charging mode. And finally, the actually measured system can stably operate under lower electric quantity, and the whole current is less than or equal to 10uA under deep dormancy.
1.2, generating the display content, taking the modulus and binary conversion
In order to reduce the calculated amount of a hardware end, reduce the electric quantity consumption, increase the flexibility of a system, the contents displayed by the duty card are rendered, split, binarized and modulo-taking by a server end, and the generated binary data are sent to the duty card, and the duty card MUC only needs to divide the data and forward the data to the electronic ink screen through an SPI protocol. The complete process is that the on-duty card end uses HTTP protocol to request display data, the server end calls corresponding picture generation method according to the mark in the request to extract corresponding data from the database to generate picture after the request passes the identity verification, the picture is divided into black and white and red and white parts after being generated, the picture is respectively subjected to fixed threshold binarization and is converted into binary data line by line, the black and white data are combined, and after the control bit is added, the black and white data are directly transmitted to the electronic on-duty card end in a binary form.
1.3 acquisition and error retry of presentation data
Referring to fig. 8, when the duty card connects WIFI and HTTP, connection failure or data loss may be caused by signal strength, interference, etc., when WIFI connection fails or breaks, reconnection for a certain number of times will be restarted, and the reconnection failure shows abnormality, and enters dormancy, waits for next retry, and when HTTP request times out or data transmission process times out, a retransmission reconnection request for a certain number of times will be initiated, and after failure, a fault reason is reported corresponding to the display, and enters dormancy. After receiving the data, the duty card terminal extracts the control bit to judge whether the configuration of WIFI and the like of the system needs to be updated, and takes out the sleep time, then separates binary data of black and white display contents, and sends the binary data to the ink screen by using SPI protocol through the control command and the data command.
1.4 dormancy and wakeup of System
After normal content display or abnormal error information display is completed, the system wakes up a timer, and the timer counts time to be a numerical value calculated by the server in units of seconds according to the time interval between the current time and the next update acquired from the server. And then the MCU turns off the power supply of the peripheral equipment and enters deep dormancy.
1.5, information edition import on duty
When the on-duty information is imported from the front-end WEB interface, xlsx and xls formats can be used, each sheet corresponds to one on-duty card, the sheet name corresponds to the name of the on-duty card, the table is required to have a name telephone field of year, month, day and name, and when the repeated content is imported, the later imported information covers the original information.
1.6 edit presentation of custom content
When a certain duty card is provided with the self-defined content, the duty card can display the self-defined content preferentially, the self-defined content can be edited on line by a WEB-end rich text editor, after the editing is finished, the duty card to be modified is designated, and then is selected to be uploaded, when the program is uploaded, html is automatically converted into canvas, then converted into png and transmitted to the rear end, and then the duty card requests data, and a binary file generated by using the image is issued. Specifically, referring to fig. 9, the content of the data displayed on the duty card in fig. 9 may include the name of the duty person on the day and the date of the day, the name of the duty person on the yesterday and the connection phone, the name of the duty person on the day and the contact phone.
1.7, short message reminding and abnormal alarm
The system calls a short message interface at the appointed time according to the short message reminding configuration to send the reminding of the appointed content to the mobile phone of the person on duty, so that the person on duty is prevented from forgetting on duty arrangement or missing on duty matters. The system automatically extracts the information of the duty cards and the alarm details of the problems of unconnected, abnormal connection, insufficient electric quantity and the like every day and sends the information and the alarm details to the mobile phone of the manager to remind the manager to treat the abnormal situation.
Finally, the system deployment related to the electronic duty card is described.
2.1 server side deployment
Referring to fig. 10, a server side writes a back-end program by using a cross-platform language and invokes data in a database, and controls a foreground to be deployed directly or deployed by using a Docker, wherein the program occupies about 200M of memory under the condition of preloading static resources in the running process, and can run smoothly under the 1C1G resources.
2.2 electronic duty card deployment
The electronic duty board does not need to consider the power supply position, can be deployed in a place covered by 2.4GWIFI, avoids dampness and sunlight exposure, and can support data encryption methods such as IEEE802.11b.g.n protocol WEP, WPA/WPA2-PSK, WPA3-Personal and the like between the electronic duty board and a server.
2.3 client side
The management end is a WEB interface, and related personnel can use a computer or a mobile phone to perform configuration. The WEB interface is in response type layout, no complex operation is performed at the front end, and the equipment performance requirement is low.
In summary, the present application has the following advantages:
1. the low-power consumption circuit can reduce the power consumption of the electronic duty card and the damage of the electronic element, and can improve the service life of the electronic duty card.
2. The electronic duty card can automatically and clearly display duty information by using the ink screen, and the displayed details comprise, but are not limited to, a person on duty and a telephone, a calendar information on duty, yesterday and an early person on duty and a telephone. In addition, the short message can be configured to remind the person on duty, the reminding content and time are defined, and the effective execution of the system on duty is ensured.
3. The electronic duty board can display information for specific personnel and specific areas, so that the electronic duty board needs convenient mobility and cannot be connected with communication or power supply lines.
4. The electronic duty card can facilitate management of duty information and duty card configuration, and the duty card running state of all jurisdictions can be checked only by logging in a WEB management interface, and the duty information, the short message reminding configuration and the display content can be checked and modified. One table can import all duty information. The tablet of on duty uses battery power supply, and WIFI connects, and low-power consumption battery duration can place at will in the WIFI coverage.
In some alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flowcharts of this application are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed, and in which sub-operations described as part of a larger operation are performed independently.
Furthermore, while the present application is described in the context of functional modules, it should be appreciated that, unless otherwise indicated, one or more of the functions and/or features may be integrated in a single physical device and/or software module or one or more of the functions and/or features may be implemented in separate physical devices or software modules. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary to an understanding of the present application. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be apparent to those skilled in the art from consideration of their attributes, functions and internal relationships. Thus, those of ordinary skill in the art will be able to implement the present application as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative and are not intended to be limiting upon the scope of the application, which is to be defined by the appended claims and their full scope of equivalents.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several programs for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable programs for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with a program execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the programs from the program execution system, apparatus, or device and execute the programs. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the program execution system, apparatus, or device.
In the foregoing description of the present specification, descriptions of the terms "one embodiment/example", "another embodiment/example", "certain embodiments/examples", and the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
While the preferred embodiment of the present invention has been described in detail, the present invention is not limited to the embodiments described above, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and these equivalent modifications and substitutions are intended to be included in the scope of the present invention as defined in the appended claims.
Claims (10)
1. The low-power-consumption circuit applied to the electronic duty board is characterized by at least comprising a control unit, a switch unit and a display unit; wherein the control unit is connected with the switch unit; the switch unit is connected with the display unit, the switch unit includes:
the device comprises a switch module, a sampling module and a charging module; the switch module is connected with the sampling module; the switch module is connected with the charging module; the sampling module is connected with the charging module in parallel.
2. The low power circuit for electronic duty cycle of claim 1, wherein said switch module comprises a first switch structure and a second switch structure; the first switch structure is connected with the second switch structure; the first switch structure is connected with the control unit; the second switch structure is connected with the sampling module.
3. The low power circuit for electronic duty cycle of claim 2, wherein said first switching structure comprises a first switching device and a first voltage regulator device; the first switching device comprises an N-channel field effect transistor or an NPN triode; when the first switching device is an N-channel field effect transistor, the first end of the first voltage stabilizing device is connected with the grid electrode of the N-channel field effect transistor; the second end of the first voltage stabilizing device is connected with the source electrode of the N-channel field effect transistor; when the first switching device is an NPN triode, the first end of the first voltage stabilizing device is connected with the base electrode of the NPN triode; and the second end of the first voltage stabilizing device is connected with the emitter of the NPN triode.
4. The low power circuit for electronic duty cycle of claim 2, wherein said second switching structure comprises a second switching device and a second voltage regulator device; the second switching device comprises a P-channel field effect transistor or a PNP triode; when the second switching device is a P-channel field effect transistor, the first end of the second voltage stabilizing device is connected with the grid electrode of the P-channel field effect transistor; the second end of the second voltage stabilizing device is connected with the source electrode of the P-channel field effect transistor; when the second switching device is a PNP triode, the first end of the second voltage stabilizing device is connected with the base electrode of the PNP triode; and the second end of the second voltage stabilizing device is connected with the emitter of the PNP triode.
5. A low power circuit for use with an electronic duty cycle as recited in claim 3, wherein said first voltage regulator device comprises one or more of a resistor, an incandescent lamp, or a tungsten lamp.
6. The low power circuit for electronic duty cycle of claim 1, wherein said charging module comprises one or more electrolytic capacitors; when the charging module comprises more than two electrolytic capacitors, any two electrolytic capacitors are connected in series.
7. The low power circuit for electronic duty cycle of claim 1, wherein said sampling module comprises a first resistor and a second resistor; one end of the first resistor is connected with the switch module; the other end of the first resistor is connected with one end of the second resistor; the other end of the second resistor is grounded.
8. The low power consumption circuit for electronic duty card of claim 7, wherein the ratio of the resistance values of said first resistor to said second resistor is 5:1.
9. the low power circuit for electronic duty cycle of claim 1, wherein said circuit further comprises a regulated power supply unit; the stabilized voltage supply unit is used for stabilizing the input voltage input into the control unit at a preset voltage.
10. A method of implementing a low power circuit according to any of claims 1-9, the method comprising:
the control module outputs high level, the switch module is conducted, the charging module charges and the output voltage of the sampling module rises;
determining that the charging time reaches a first preset threshold value, and adjusting the control module to output a low level so as to enable the charging module to discharge and the output voltage of the sampling module to drop;
Determining that the discharge time reaches a second preset threshold value, and adjusting the control module to output a high level;
and returning to the execution step to determine that the charging time reaches a first preset threshold value, adjusting the output low level of the control module to enable the charging module to discharge, reducing the output voltage of the sampling module, determining that the discharging time reaches a second preset threshold value, and adjusting the output high level of the control module until the output voltage of the sampling module is the target voltage.
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| CN202311523633.6A CN117555378A (en) | 2023-11-15 | 2023-11-15 | Low-power-consumption circuit applied to electronic duty board and implementation method thereof |
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| CN202311523633.6A CN117555378A (en) | 2023-11-15 | 2023-11-15 | Low-power-consumption circuit applied to electronic duty board and implementation method thereof |
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