CN111490602A - Charging circuit of fault indicator and fault indicator - Google Patents
Charging circuit of fault indicator and fault indicator Download PDFInfo
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- CN111490602A CN111490602A CN202010311455.0A CN202010311455A CN111490602A CN 111490602 A CN111490602 A CN 111490602A CN 202010311455 A CN202010311455 A CN 202010311455A CN 111490602 A CN111490602 A CN 111490602A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention discloses a charging circuit of a fault indicator and the fault indicator, wherein the charging circuit comprises: the system comprises an energy taking module, a system switch module, a self-adjusting switch module, a processor and an energy storage module; the energy taking module is used for generating electric energy by being inducted with a tested circuit, the energy taking module is electrically connected with the system switch module, the control end of the system switch module is electrically connected with the processor, and the system switch module is also electrically connected with the self-adjusting switch module; the self-adjusting switch module is electrically connected with the energy storage module; the system switch module is switched on or off according to a control signal of the processor; the self-adjusting switch module adjusts the conduction state of the self-adjusting switch module according to the voltage provided by the energy taking module in the conduction state of the system switch module, and transmits the voltage provided by the energy taking module to the energy storage module in the conduction state. The technical scheme provided by the embodiment of the invention improves the utilization rate of circuit energy, simplifies the circuit, reduces the cost and ensures the normal use of the fault indicator under low current.
Description
Technical Field
The embodiment of the invention relates to the technical field of circuits, in particular to a charging circuit of a fault indicator and the fault indicator.
Background
The power supply circuit of the existing overhead external signal type fault indicator mainly comprises a plurality of parts, wherein the main circuit comprises a rectifying and voltage stabilizing circuit of an energy taking coil, a charging and discharging circuit of a super capacitor and a battery power supply circuit. The charging and discharging circuit of the super capacitor is a secondary power supply system of the system and is responsible for controlling the circuit to charge the super capacitor when the energy-taking coil works normally and providing energy for the main system when the coil cannot work normally.
The existing charging circuit is controlled by using a charging management chip, the scheme needs a system to control the chip, the cost of the chip is high, and the circuit layout is complex; and under the condition of small load current, because the circuit can not charge the super capacitor under the control of the system due to the consideration of system safety, partial energy is wasted, and the card turner for alarming the fault indicator can not work normally when the battery can not work normally or the current is small.
Disclosure of Invention
The embodiment of the invention provides a charging circuit of a fault indicator and the fault indicator, which are used for simplifying the circuit, reducing the cost, improving the utilization rate of circuit energy and ensuring the normal use of the fault indicator under the condition of low current or incapability of working of a battery.
In a first aspect, an embodiment of the present invention provides a charging circuit for a fault indicator, including:
the system comprises an energy taking module, a system switch module, a self-adjusting switch module, a processor and an energy storage module;
the energy taking module is used for generating electric energy by being induced with a tested circuit, the output end of the energy taking module is electrically connected with the first end of the system switch module, the control end of the system switch module is electrically connected with the processor, and the second end of the system switch module is electrically connected with the first end of the self-adjusting switch module; the second end of the self-regulating switch module is electrically connected with the output end of the charging circuit, and the control end of the self-regulating switch module inputs a reference voltage;
the system switch module is used for switching on or off according to a control signal of the processor; the self-adjusting switch module is used for adjusting the conduction state of the self-adjusting switch module according to the voltage provided by the energy taking module in the conduction state of the system switch module, and transmitting the voltage provided by the energy taking module to the energy storage module in the conduction state.
Optionally, the system switch module includes:
the circuit comprises a first switch tube, a second switch tube, a first resistor, a second resistor and a third resistor;
the first end of the first switch tube is electrically connected with the output end of the energy obtaining module and the first end of the first resistor; the control end of the first switch tube is electrically connected with the second end of the first resistor and the first end of the second switch tube; the second end of the first switch tube is electrically connected with the first end of the self-adjusting switch module; the control end of the second switch tube is electrically connected with the second end of the second resistor and the first end of the third resistor; a first end of the second resistor is input with a control signal of the processor; the second end of the second switch tube and the second end of the third resistor are grounded.
Optionally, the self-adjusting switch module includes:
a third switching tube and a fourth resistor;
the first end of the third switching tube is electrically connected with the second end of the system switch module, the control end of the third switching tube is electrically connected with the first end of the fourth resistor, the second end of the third switching tube is electrically connected with the energy storage module, and the second end of the fourth resistor is input into a system power supply of a main system power supply connected with a fault indicator.
Optionally, the third switching tube is a P-type field effect tube.
Optionally, the first switch tube is a P-type field effect tube, and the second switch tube is an N-type field effect tube.
Optionally, the energy obtaining module includes:
the power taking coil unit is used for acquiring different power supply voltages according to the current value of the line;
a rectifying and filtering unit for rectifying and filtering the supply voltage.
Optionally, the energy storage module includes a capacitor, a first end of the capacitor is electrically connected to the self-regulating switch module, and a second end of the capacitor is grounded; the first end of the capacitor is also electrically connected with the main system power supply, and the capacitor is used for providing voltage for a peripheral circuit through the main system power supply when discharging.
Optionally, the charging circuit of the fault indicator further includes a first diode, a first end of the first diode is electrically connected with the second end of the self-regulating switch module and the first end of the energy storage module, and a second end of the first diode is grounded; the first diode is used for stabilizing the voltage provided by the energy-taking module to be less than or equal to the safe voltage of the capacitor.
Optionally, the charging circuit of the fault indicator further includes: the first end of the second diode is electrically connected with the second end of the self-regulating switch module and the first end of the energy storage module, and the second end of the second diode is electrically connected with the output end of the energy taking module and the first end of the system switch module; the second diode is used for feeding back the stability of the power supply voltage after passing through the self-regulating switch module.
In a second aspect, an embodiment of the present invention provides a fault indicator, including a discharge circuit, a battery, an anti-jitter and controllable circuit, a main system power supply, and a peripheral circuit, and further including the charging circuit according to any one of the first aspects; the processor is electrically connected with the control end of the discharge circuit, and the output end of the charge circuit is electrically connected with the input end of the discharge circuit; the output end of the discharge circuit is electrically connected with the second power supply input end of the anti-shake and controllable circuit, the battery is electrically connected with the first power supply input end of the anti-shake and controllable circuit, and the processor is electrically connected with the control end of the anti-shake and controllable circuit; the main system power supply is electrically connected with the output end of the anti-shake and controllable circuit, the main system power supply is electrically connected with the input end of the peripheral circuit, and the first power supply provided by the battery and/or the second power supply provided by the discharge circuit form stable voltage through the processing of the anti-shake and controllable circuit so as to enable the peripheral circuit to work normally.
The embodiment of the invention provides a charging circuit of a fault indicator and the fault indicator, wherein the charging circuit comprises: the system comprises an energy taking module, a system switch module, a self-adjusting switch module, a processor and an energy storage module; the energy taking module is used for generating electric energy by being inducted with a tested circuit, the output end of the energy taking module is electrically connected with the first end of the system switch module, the control end of the system switch module is electrically connected with the processor, and the second end of the system switch module is electrically connected with the first end of the self-adjusting switch module; the second end of the self-regulating switch module is electrically connected with the output end of the charging circuit, and the control end of the self-regulating switch module inputs reference voltage; the system switch module is used for switching on or off according to a control signal of the processor; the self-adjusting switch module is used for adjusting the conduction state of the self according to the voltage provided by the energy taking module in the conduction state of the system switch module, and transmitting the voltage provided by the energy taking module to the energy storage module in the conduction state. According to the technical scheme provided by the embodiment of the invention, the self-adjusting switch module adjusts the self-conducting state according to the voltage provided by the energy taking module in the conducting state of the system switch module, and transmits the voltage provided by the energy taking module to the energy storage module in the conducting state. The utilization rate of circuit energy is improved, the circuit is simplified, the cost is reduced, and the normal use of the fault indicator under the condition of low current or incapability of working of a battery is ensured.
Drawings
Fig. 1 is a block diagram of a charging circuit of a fault indicator according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a charging circuit of a fault indicator according to a second embodiment of the present invention;
fig. 3 is a circuit diagram of a charging circuit of a fault indicator according to a third embodiment of the present invention;
fig. 4 is a block diagram of a fault indicator according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
An embodiment of the present invention provides a charging circuit for a fault indicator, and fig. 1 is a block diagram of a structure of the charging circuit for a fault indicator provided in the embodiment of the present invention, and referring to fig. 1, the charging circuit includes:
the energy taking module 10, the system switch module 20, the self-regulating switch module 30, the processor 40 and the energy storage module 50;
the energy taking module 10 is used for inducing the tested circuit to generate electric energy, the output end of the energy taking module 10 is electrically connected with the first end of the system switch module 20, the control end of the system switch module 20 is electrically connected with the processor 40, and the second end of the system switch module 20 is electrically connected with the first end of the self-adjusting switch module 30; the second terminal of the self-regulating switch module 30 is electrically connected with the output terminal of the charging circuit, and the control terminal of the self-regulating switch module 30 inputs a reference voltage;
the system switch module 20 is used for switching on or off according to a control signal of the processor 40; the self-adjusting switch module 30 is configured to adjust a conducting state thereof according to the voltage provided by the energy extraction module 10 when the system switch module 20 is in a conducting state, and transmit the voltage provided by the energy extraction module 10 to the energy storage module 50 when the system switch module is in the conducting state.
Specifically, the charging circuit of the fault indicator includes an energy-taking module 10, a system switch module 20, a self-regulating switch module 30, a processor 40, and an energy storage module 50. The energy obtaining module 10 and the tested circuit can generate electric energy through sensing, when the current in the tested circuit is large, the electric energy generated by the energy obtaining module 10 and the tested circuit through sensing is large, and when the current in the tested circuit is small, the electric energy generated by the energy obtaining module 10 and the tested circuit through sensing is small. The output end of the energy-taking module 10 is electrically connected with the first end of the system switch module 20, the control end of the system switch module 20 is electrically connected with the processor 40, and the second end of the system switch module 20 is electrically connected with the first end of the self-adjusting switch module 30; the second terminal of the self-regulating switch module 30 is electrically connected to the output terminal of the charging circuit, and the control terminal of the self-regulating switch module 30 inputs the reference voltage. The reference voltage may be provided by the main system power supply 100 of the fault indicator and the power generated by the power harvesting module 10 may provide system power to the main system power supply 100. The system switch module 20 is turned on or off according to a control signal of the processor 40; for example, the system switch module 20 is turned on when the control signal output by the processor 40 is at a high level, and the system switch module 20 is turned off when the control signal output by the processor 40 is at a low level, or the system switch module 20 is turned on when the control signal output by the processor 40 is at a low level, and the system switch module 20 is turned off when the control signal output by the processor 40 is at a high level. The on control signal and the off control signal of the system switch module are not limited herein. The self-adjusting switch module 30 is configured to adjust a conducting state thereof according to the voltage provided by the energy extraction module 10 when the system switch module 20 is in a conducting state, and transmit the voltage provided by the energy extraction module 10 to the energy storage module 50 when the system switch module is in the conducting state. For example, when the voltage provided by the energy extracting module 10 at the first terminal input of the self-regulating switch module 30 is greater than the reference voltage at the control terminal input thereof, and the difference between the voltage provided by the energy extracting module 10 and the reference voltage at the control terminal input is greater than the threshold voltage of the self-regulating switch module 30, the self-regulating switch module 30 is turned on to transmit the voltage provided by the energy extracting module 10 to the energy storage module 50.
In the charging circuit in the prior art, a charging management chip is used for controlling charging of the charging circuit, the scheme needs a system to control the chip, the cost of the charging management chip is high, and the layout of the circuit is complex. In addition, under the condition of low load current, in order to ensure the normal work of the system of the fault indicator, the condition that the power supply of the fault indicator shakes due to triggering of the card turning device to give an alarm is avoided, and the energy storage module cannot be charged so as to cause the waste of partial energy taking energy. Therefore, in the prior art, the card turner of the fault indicator can only work normally under the condition of large current. The charging circuit provided by the present application adjusts the conduction state of the self-regulating switch module 30 according to the voltage provided by the energy obtaining module 10 when the system switch module 20 is in the conduction state, and can transmit the voltage provided by the energy obtaining module 10 to the energy storage module 50 in the conduction state. In the case of a small load current, the difference between the voltage provided by the energy extracting module 10 and the reference voltage input by the control terminal, which are input by the first terminal of the self-regulating switch module 30, may be greater than the threshold voltage of the self-regulating switch module 30, so as to charge the energy storage module 50 in the case of a small load current. The utilization rate of circuit energy is improved, the circuit is simplified, and the cost is reduced.
An embodiment of the present invention further provides a charging circuit for a fault indicator, including: the system comprises an energy taking module, a system switch module, a self-adjusting switch module, a processor and an energy storage module; the energy taking module is used for generating electric energy by being inducted with a tested circuit, the output end of the energy taking module is electrically connected with the first end of the system switch module, the control end of the system switch module is electrically connected with the processor, and the second end of the system switch module is electrically connected with the first end of the self-adjusting switch module; the second end of the self-regulating switch module is electrically connected with the output end of the charging circuit, and the control end of the self-regulating switch module inputs reference voltage; the system switch module is used for switching on or off according to a control signal of the processor; the self-adjusting switch module is used for adjusting the conduction state of the self according to the voltage provided by the energy taking module in the conduction state of the system switch module, and transmitting the voltage provided by the energy taking module to the energy storage module in the conduction state. According to the technical scheme provided by the embodiment of the invention, the self-adjusting switch module adjusts the self-conducting state according to the voltage provided by the energy taking module in the conducting state of the system switch module, and transmits the voltage provided by the energy taking module to the energy storage module in the conducting state. The utilization rate of circuit energy is improved, the circuit is simplified, the cost is reduced, and the normal use of the fault indicator under the condition of low current or incapability of working of a battery is ensured.
Example two
On the basis of the above embodiments, the charging circuit for the fault indicator provided by the embodiment of the invention refines the system switch module, the self-adjusting switch module, the energy taking module and the energy storage module. Fig. 2 is a circuit diagram of a charging circuit of a fault indicator according to a second embodiment of the present invention, please refer to fig. 2.
Optionally, the system switch module 20 includes:
the circuit comprises a first switch tube Q1, a second switch tube Q2, a first resistor R1, a second resistor R2 and a third resistor R3;
a first end of the first switch tube Q1 is electrically connected with the output end of the energy-taking module 10 and a first end of the first resistor R1; the control end of the first switch tube Q1 is electrically connected with the second end of the first resistor R1 and the first end of the second switch tube Q2; a second terminal of the first switching tube Q1 is electrically connected to a first terminal of the self-regulating switch module 30; the control end of the second switch tube Q2 is electrically connected with the second end of the second resistor R2 and the first end of the third resistor R3; a first end of the second resistor R2 inputs a control signal of the processor 40; the second terminal of the second switch Q2 and the second terminal of the third resistor R3 are grounded GND.
Specifically, the system switch module 20 includes a first switch Q1, a second switch Q2, a first resistor R1, a second resistor R2, and a third resistor R3. A first end of the first switch tube Q1 is electrically connected to the output end of the energy obtaining module 10 and a first end of the first resistor R1, and a control end of the first switch tube Q1 is electrically connected to a second end of the first resistor R1 and a first end of the second switch tube Q2; a second terminal of the first switching tube Q1 is electrically connected to a first terminal of the self-regulating switch module 30. The power generated by the power-taking module 10 and the circuit to be tested is inputted into the first switch tube Q1 from the first end of the first switch tube Q1, and inputted into the first resistor R1 from the first end of the first resistor R1, and the control end of the first switch tube Q1 is electrically connected with the second end of the first resistor R1, that is, the voltage applied to the two ends of the first resistor R1 is equal to the voltage applied between the first end and the control end of the first switch tube Q1. A first end of the second switch tube Q2 is electrically connected with a control end of the first switch tube Q1 and a second end of the first resistor R1; the control end of the second switch tube Q2 is electrically connected with the second end of the second resistor R2 and the first end of the third resistor R3; a first end of the second resistor R2 inputs a control signal of the processor 40; the second terminal of the second switch Q2 and the second terminal of the third resistor R3 are grounded GND. The second resistor R2 and the third resistor R3 are voltage dividing resistors, and the first terminal and the control terminal of the second switch transistor Q2 are electrically connected to the two terminals of the third resistor R3 in a one-to-one correspondence manner, that is, the voltage applied to the two terminals of the third resistor R3 is equal to the voltage applied between the first terminal and the control terminal of the second switch transistor Q2. Optionally, the first switch tube Q1 is a P-type field effect transistor, the second switch tube Q2 is an N-type field effect transistor, when the control signal input to the processor 40 from the first end of the second resistor R2 is at a high level, the second switch tube Q2 is turned on, the control end of the first switch tube Q1 is grounded GND, and the voltage output from the output end of the energy obtaining module 10 may turn on the first switch tube Q1. That is, when the control signal of the processor 40 is at a high level, the system switch module 20 is turned on, and when the control signal of the processor 40 is at a low level or no electric signal is input, the system switch module 20 is turned off.
Optionally, the self-regulating switch module 30 comprises:
a third switching tube Q3 and a fourth resistor R4;
a first end of the third switching tube Q3 is electrically connected to a second end of the system switching module 20, a control end of the third switching tube Q3 is electrically connected to a first end of the fourth resistor R4, a second end of the third switching tube Q3 is electrically connected to the energy storage module 50, and a second end of the fourth resistor R4 is connected to a system power supply of the main system power supply 100 of the fault indicator.
Specifically, the self-adjusting switch module 30 includes a third switch transistor Q3 and a fourth resistor R4. The first terminal of the third switch Q3 is electrically connected to the second terminal of the system switch module 20, and when the system switch module 20 is turned on, the electric power obtained by the power-taking module 10 can be supplied to the input terminal of the self-adjusting switch module 30, i.e., the first terminal of the third switch Q3. A control terminal of the third switching tube Q3 is electrically connected with a first terminal of the fourth resistor R4, a second terminal of the third switching tube Q3 is electrically connected with the energy storage module 50, and a second terminal of the fourth resistor R4 is input to a system power supply of the main system power supply 100 connected with the fault indicator. Optionally, the third switch Q3 is a P-type fet, and the self-adjusting switch module 30 is turned on when the power supplied by the power-taking module 10 is greater than the system power of the main system power supply 100 and the difference between the power supplied by the power-taking module 10 and the system power of the main system power supply 100 is able to turn on the switch Q3. The second end of the third switch Q3 is electrically connected to the energy storage module 50, and the electric power obtained by the energy obtaining module 10 is transmitted to the energy storage module 50 through the system switch module 20 and the self-adjusting switch module 30 to provide the electric power for the energy storage module 50 to charge. The system power supply of the main system power supply 100 of the fault indicator is provided by the power obtained by the power taking module 10 through the low dropout voltage stabilizing chip to stabilize the voltage at a stable voltage value.
Optionally, the energy obtaining module 10 includes:
the power taking coil unit 11 is used for obtaining different power supply voltages according to the current value of the line;
a rectifying and filtering unit 12, the rectifying and filtering unit 12 being adapted to rectify and filter the supply voltage.
Specifically, the energy obtaining module 10 includes an energy obtaining coil unit 11, and the energy obtaining coil unit 11 obtains different power supply voltages according to a current value of a line based on an electromagnetic induction theorem through the energy obtaining coil. The energy obtaining module 10 further includes a rectifying and filtering unit 12, and the rectifying and filtering unit 12 rectifies and filters the power supply voltage provided by the energy obtaining coil unit 11 to obtain the working voltage of the fault indicator.
Optionally, the energy storage module 50 includes a capacitor C, a first end of the capacitor C is electrically connected to the self-regulating switch module 30, and a second end of the capacitor C is grounded to GND; the first terminal of the capacitor C is also electrically connected to the main system power supply 100, and the capacitor C is used for supplying power to the main system power supply 100 when discharging, so as to supply power to the peripheral circuit 110 through the main system power supply 100, for example, to supply power to a card flipper in the peripheral circuit 110 to ensure the normal operation thereof. The capacitor C can be a super capacitor, the super capacitor is an electrochemical element for storing energy through a polarized electrolyte, high-efficiency energy storage can be realized, the charging capacity is improved, and the working time of the fault indicator is further prolonged.
The charging circuit of the fault indicator provided by the embodiment of the invention refines the system switch module, the self-regulating switch module, the energy taking module and the energy storage module. The system switch module comprises a first switch tube and a second switch tube, and the self-regulating switch module comprises a third switch tube. The first switching tube and the third switching tube are both P-type field effect tubes, the second switching tube is an N-type field effect tube, the third switching tube is adjusted to be switched on according to the voltage provided by the energy taking module and the system power value of the main system power supply input by the control end of the third switching tube by controlling the first switching tube and the second switching tube, and the energy taking module is used for charging the energy storage module after the third switching tube is switched on. The electric energy obtained by the energy taking module under the condition of small load current can realize the conduction of the third switching tube. The technical scheme provided by the embodiment of the invention utilizes the conduction characteristic of the P-type field effect transistor, and automatically controls the conduction or the closing of the self-adjusting switch module by controlling the voltage value of the control end instead of the high-low level change, thereby controlling the working state of the charging circuit, effectively increasing the energy storage efficiency of the circuit, saving the system resources, increasing the response speed of the system, simplifying the circuit, reducing the cost and ensuring the normal use of the fault indicator under low current.
EXAMPLE III
On the basis of the above embodiment, the charging circuit for the fault indicator provided by the embodiment of the invention further comprises a first diode and a second diode. Fig. 3 is a circuit diagram of a charging circuit of a fault indicator according to a third embodiment of the present invention, please refer to fig. 3.
Optionally, the charging circuit of the fault indicator further includes a first diode D1, a first terminal of the first diode D1 is electrically connected to the second terminal of the self-regulating switch module 30 and the first terminal of the energy storage module 50, and a second terminal of the first diode D1 is connected to the ground GND; the first diode D1 is used to stabilize the power supplied by the power-taking module 10 to a safe voltage less than or equal to the capacitor C. First diode D1 is zener diode, and the purpose prevents that charging voltage is too high to damage electric capacity C, and zener diode's model can be changed according to rear end energy storage module's electric capacity C's performance to guarantee that electric capacity C of different charging capacities carries out normal charging.
Optionally, the charging circuit of the fault indicator further includes a second diode D2, a first terminal of the second diode D2 is electrically connected to the second terminal of the self-regulating switch module 30 and the first terminal of the energy storage module 50, and a second terminal of the second diode D2 is electrically connected to the output terminal of the energy extraction module 10 and the first terminal of the system switch module 20; the second diode D2 may provide a timely feedback of the stability of the supply voltage after passing through the self-regulating switch module 30 to the energy extraction module 10.
Illustratively, when the line on which the energy obtaining module 10 is located is a low-current load line, the energy obtaining coil of the energy obtaining coil unit 11 induces a current to generate a supply voltage, and the supply voltage is rectified and filtered by the rectifying and filtering unit 12 and then is transmitted to the first switching tube Q1 of the system switching module 20 through the output end of the energy obtaining module 10. The voltage output by the output end of the energy-taking module 10 after the power supply voltage is rectified and filtered by the rectifying and filtering unit 12 is also used for stabilizing the voltage at 3V by the low-dropout voltage stabilizing chip to provide a system power supply for the main system power supply 100 connected with the fault indicator. The main system power supply 100 provides the processor 40 with a working voltage, and a voltage of more than 1.7V can satisfy the normal operation of the processor 40. When the processor 40 is initialized, a control signal is input to the control terminal of the second switch Q2, and the second switch Q2 is an N-type fet, that is, the control signal output by the processor 40 is at a high level. After the second switch tube Q2 is turned on, the control terminal of the first switch tube Q1 is grounded GND, and the first switch tube Q1 is a P-type field effect transistor, so that the turn-on voltage of the first switch tube Q1 is greater than the threshold voltage, and the first switch tube Q1 is turned on.
The first end of the third switching tube Q3 inputs the voltage provided by the energy-extracting module 10 after the system switching module 20 is turned on, the control end of the third switching tube Q3 inputs the system power of the main system power supply 100, the third switching tube Q3 is a P-type field effect transistor, and in order to ensure that the third switching tube Q3 is normally turned on (the on voltage is greater than the threshold voltage), the voltage input by the energy-extracting module 10 into the third switching tube Q3 is greater than the sum of the voltage of the system power and the threshold voltage of the third switching tube Q3. Because the types of the selected P-type field effect transistors are different, the threshold voltage can be changed to a certain extent, and the voltage input into the control end can be changed or a proper P-type field effect transistor can be selected according to requirements. For example, the threshold voltage of the pfet is stabilized at 0.55V, the third switch Q3 may be automatically turned on when the voltage provided by the energy obtaining module 10 is higher than the input voltage at the control terminal by 0.55V, and may be automatically turned off when the voltage is lower than 0.55V, and the third switch Q3 may be configured to implement the automatic turning on and off of the charging circuit. It is ensured that the voltage provided by the energy-taking module 10 can charge the energy storage module 50 when the circuit is in a low-current load, so that the energy storage module 50 provides electric energy for the main system power supply 100 when discharging, and thus provides working voltage for the card turner in the fault indicator peripheral circuit 110. In addition, the first diode D1 is a zener diode, which can prevent the super capacitor from being damaged by too high charging voltage, and the model can be replaced according to the performance of the back-end super capacitor, for example, the maximum charging voltage of the super capacitor of the energy storage module 50 is 5V, and when the voltage provided by the energy obtaining module 10 is less than or equal to 5V, the super capacitor is normally charged with the voltage provided by the energy obtaining module 10. When the voltage provided by the energy obtaining module 10 is greater than 5V, the voltage stabilizing diode stabilizes the voltage provided by the energy obtaining module 10 at 5V to charge the super capacitor.
The charging circuit of the fault indicator provided by the embodiment of the invention further comprises a first diode and a second diode. The first diode is a voltage stabilizing diode, and the energy storage module can be prevented from being damaged due to overhigh charging voltage. The second diode can realize timely feedback of the stability of the power supply voltage passing through the self-adjusting switch module to the energy taking module, so that the working state of the charging circuit is controlled. The energy storage efficiency of the circuit is further effectively increased, system resources are saved, the response speed of the system is increased, the circuit is simplified, the cost is reduced, and the normal use of the fault indicator under low current is ensured.
Example four
An embodiment of the present invention provides a fault indicator, which includes a discharge circuit, a battery, an anti-jitter and controllable circuit, a main system power supply, a peripheral circuit, and a charging circuit as described in any of the above embodiments. Fig. 4 is a block diagram of a fault indicator according to a fourth embodiment of the present invention, please refer to fig. 4.
The processor 40 is electrically connected to the control terminal of the discharge circuit 120, and the output terminal of the charge circuit 150 is electrically connected to the input terminal of the discharge circuit 120; the output end of the discharging circuit 120 is electrically connected with the second power input end of the anti-shake and controllable circuit 130, the battery 140 is electrically connected with the first power input end of the anti-shake and controllable circuit 120, and the processor 40 is electrically connected with the control end of the anti-shake and controllable circuit 120; the main system power supply 100 is electrically connected to the output terminal of the anti-jitter and controllable circuit 20, the main system power supply 100 is electrically connected to the input terminal of the peripheral circuit 110, and the first power supply provided by the battery 140 and/or the second power supply provided by the discharging circuit 120 forms a stable voltage for the normal operation of the peripheral circuit 110 through the processing of the anti-jitter and controllable circuit 130.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A charging circuit for a fault indicator, comprising:
the system comprises an energy taking module, a system switch module, a self-adjusting switch module, a processor and an energy storage module;
the energy taking module is used for generating electric energy by being induced with a tested circuit, the output end of the energy taking module is electrically connected with the first end of the system switch module, the control end of the system switch module is electrically connected with the processor, and the second end of the system switch module is electrically connected with the first end of the self-adjusting switch module; the second end of the self-regulating switch module is electrically connected with the output end of the charging circuit, and the control end of the self-regulating switch module inputs a reference voltage;
the system switch module is used for switching on or off according to a control signal of the processor; the self-adjusting switch module is used for adjusting the conduction state of the self-adjusting switch module according to the voltage provided by the energy taking module in the conduction state of the system switch module, and transmitting the voltage provided by the energy taking module to the energy storage module in the conduction state.
2. The fault indicator charging circuit of claim 1, wherein the system switch module comprises:
the circuit comprises a first switch tube, a second switch tube, a first resistor, a second resistor and a third resistor;
the first end of the first switch tube is electrically connected with the output end of the energy obtaining module and the first end of the first resistor; the control end of the first switch tube is electrically connected with the second end of the first resistor and the first end of the second switch tube; the second end of the first switch tube is electrically connected with the first end of the self-adjusting switch module; the control end of the second switch tube is electrically connected with the second end of the second resistor and the first end of the third resistor; a first end of the second resistor is input with a control signal of the processor; the second end of the second switch tube and the second end of the third resistor are grounded.
3. The fault indicator charging circuit of claim 1, wherein the self-regulating switch module comprises:
a third switching tube and a fourth resistor;
the first end of the third switching tube is electrically connected with the second end of the system switch module, the control end of the third switching tube is electrically connected with the first end of the fourth resistor, the second end of the third switching tube is electrically connected with the energy storage module, and the second end of the fourth resistor is input into a system power supply of a main system power supply connected with a fault indicator.
4. The charging circuit of claim 3, wherein the third switch tube is a PFET.
5. The charging circuit of claim 2, wherein the first switch tube is a P-type fet and the second switch tube is an N-type fet.
6. The charging circuit of claim 1, wherein the energy-scavenging module comprises:
the power taking coil unit is used for acquiring different power supply voltages according to the current value of the line;
a rectifying and filtering unit for rectifying and filtering the supply voltage.
7. The fault indicator charging circuit according to claim 1, wherein the energy storage module comprises a capacitor, a first end of the capacitor is electrically connected to the self-regulating switch module, and a second end of the capacitor is grounded; the first end of the capacitor is also electrically connected with the main system power supply, and the capacitor is used for providing voltage for the peripheral circuit through the main system power supply when discharging.
8. The fault indicator charging circuit according to claim 7, further comprising a first diode, a first end of the first diode being electrically connected to the second end of the self-regulating switch module and the first end of the energy storage module, a second end of the first diode being connected to ground; the first diode is used for stabilizing the voltage provided by the energy-taking module to be less than or equal to the safe voltage of the capacitor.
9. The fault indicator charging circuit according to claim 1, further comprising: the first end of the second diode is electrically connected with the second end of the self-regulating switch module and the first end of the energy storage module, and the second end of the second diode is electrically connected with the output end of the energy taking module and the first end of the system switch module; the second diode is used for feeding back the stability of the power supply voltage after passing through the self-regulating switch module.
10. A fault indicator comprising a discharge circuit, a battery, anti-jitter and controllable circuits, a main system power supply and peripheral circuits, and further comprising a charging circuit as claimed in any one of claims 1 to 9; the processor is electrically connected with the control end of the discharge circuit, and the output end of the charge circuit is electrically connected with the input end of the discharge circuit; the output end of the discharge circuit is electrically connected with the second power supply input end of the anti-shake and controllable circuit, the battery is electrically connected with the first power supply input end of the anti-shake and controllable circuit, and the processor is electrically connected with the control end of the anti-shake and controllable circuit; the main system power supply is electrically connected with the output end of the anti-shake and controllable circuit, the main system power supply is electrically connected with the input end of the peripheral circuit, and the first power supply provided by the battery and/or the second power supply provided by the discharge circuit form stable voltage through the processing of the anti-shake and controllable circuit so as to enable the peripheral circuit to work normally.
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| CN202010311455.0A CN111490602A (en) | 2020-04-20 | 2020-04-20 | Charging circuit of fault indicator and fault indicator |
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| CN202010311455.0A CN111490602A (en) | 2020-04-20 | 2020-04-20 | Charging circuit of fault indicator and fault indicator |
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