Electrolytic capacitor energy storage type relay driving circuit for electricity meter and terminal equipment

Abstract

The utility model relates to an electrolytic capacitor energy storage type relay driving circuit for an electricity meter and terminal equipment. The electrolytic capacitor energy storage type relay driving circuit comprises a processing unit, an electrolytic capacitor energy storage unit, a driving unit and an electric pull-in relay, the input end of the electrolytic capacitor energy storage unit is used for being connected with a power supply end; a first input end of the driving unit is connected with the electrolytic capacitor energy storage unit or the power supply end, and a second input end and a third input end of the driving unit are in communication connection with the processing unit; the first input end of the electric pull-on relay is connected with the first output end of the driving unit to indirectly conduct the first input end, the second input end and the third input end of the driving unit; the second input end of the electric pull-on relay is connected with the second output end of the driving unit to indirectly conduct the first input end, the second input end and the third input end of the driving unit, and the output end of the electric pull-on relay is used for being connected with a load circuit. The utility model solves the problems of high energy consumption and low response speed.

Description

Technical Field

[0001] The utility model relates to the technical field of drive circuits, in particular to an electrolytic capacitor energy storage type relay drive circuit for electric meters and terminal devices. Background Art

[0002] As power metering devices, electric meters and terminal devices play an important role in the power system. However, in an environment with large power fluctuations, the working performance of traditional electric meters and terminal devices is easily affected, resulting in inaccurate metering or device damage. In addition, when traditional electric meters and terminal devices drive the pull-in and pull-out relays, they often consume a large amount of energy and have a slow response speed.

[0003] Existing electric meters and terminal devices adopt backup power supplies or voltage stabilizing circuits to cope with power fluctuations, but these solutions often increase the complexity and cost of the devices. At the same time, when these solutions drive the pull-in and pull-out relays, they still consume a large amount of energy and have a limited response speed. In addition, some electric meters adopt electronic relays to replace traditional mechanical relays. Although the response speed is improved, the problems of energy consumption and power fluctuations are not fundamentally solved. Summary of the Utility Model

[0004] In view of this, the utility model provides an electrolytic capacitor energy storage type relay drive circuit for electric meters and terminal devices, which is used to solve the problems of high energy consumption and low response speed in the prior art.

[0005] To achieve one or part or all of the above purposes or other purposes, the utility model proposes an electrolytic capacitor energy storage type relay drive circuit for electric meters and terminal devices, and the electrolytic capacitor energy storage type relay drive circuit for electric meters and terminal devices includes: a processing unit, an electrolytic capacitor energy storage unit, a drive unit, and a pull-in and pull-out relay;

[0006] The input end of the electrolytic capacitor energy storage unit is connected to the processing unit and is used to connect to a power supply end to control the charging process of the power supply end to the electrolytic capacitor energy storage unit;

[0007] The first input end of the drive unit is connected to the electrolytic capacitor energy storage unit or the power supply end, and its second input end and third input end are communicatively connected to the processing unit;

[0008] The first input end of the pull-in and pull-out relay indirectly conducts the first input end, the second input end, and the third input end of the drive unit by connecting to the first output end of the drive unit, the second input end of the pull-in and pull-out relay indirectly conducts the first input end, the second input end, and the third input end of the drive unit by connecting to the second output end of the drive unit, and the output end of the pull-in and pull-out relay is used to connect to a load circuit.

[0009] Further, the electrolytic capacitor energy storage unit includes: a first resistor and a first capacitor;

[0010] One end of the first resistor is connected to the processing unit and is used for connecting to the power supply terminal; the other end thereof is connected to the first input terminal of the driving unit;

[0011] One end of the first capacitor is connected in parallel between the first resistor and the driving unit, and the other end thereof is used for connecting to the ground terminal.

[0012] Further, the driving unit includes: a first triode, a second triode, a third triode, a fourth triode, a first driving output terminal, and a second driving output terminal;

[0013] The emitter of the first triode is connected to the other end of the first resistor;

[0014] The emitter of the second triode is connected to the other end of the first resistor;

[0015] The collector of the third triode is respectively connected to the collector of the first triode and the base of the second triode. The emitter of the third triode is used for connecting to the ground terminal, and the base of the third triode is communicatively connected to the processing unit;

[0016] The collector of the fourth triode is respectively connected to the collector of the second triode and the base of the first triode. The emitter of the fourth triode is used for connecting to the ground terminal, and the base of the fourth triode is communicatively connected to the processing unit;

[0017] The input end of the first driving output terminal is connected in parallel between the base of the second triode and the collector of the third triode, and the output end of the first driving output terminal is connected to the first input terminal of the electric switching relay;

[0018] The input end of the second driving output terminal is connected in parallel between the base of the first triode and the collector of the fourth triode, and the output end of the second driving output terminal is connected to the second input terminal of the electric switching relay.

[0019] Further, the input end of the second driving output terminal is connected in parallel between the base of the first triode and the collector of the fourth triode to form a first parallel connection point, and the input end of the first driving output terminal is connected in parallel between the base of the second triode and the collector of the third triode to form a second parallel connection point;

[0020] The driving unit further includes: a second resistor and a third resistor;

[0021] Both ends of the second resistor are respectively connected to the base of the second triode and the second parallel point;

[0022] Both ends of the third resistor are respectively connected to the base of the first triode and the first parallel point.

[0023] Further, the driving unit further includes a TVS tube; both ends of the TVS tube are respectively connected to the first parallel point and the second parallel point.

[0024] Further, the electrolytic capacitor energy storage type relay driving circuit for the electricity meter and the terminal device further includes: an electric energy metering unit;

[0025] The signal end of the electric energy metering unit is communicatively connected to the processing unit, and the measuring end of the electric energy metering unit is used to connect to the load circuit.

[0026] Further, the electric energy metering unit includes: an electric energy metering processing chip, an electric energy metering signal transmission protection unit, an electric energy metering signal receiving protection unit, and an electric energy metering test protection unit;

[0027] One end of the electric energy metering signal transmission protection unit is connected to the signal receiving end of the electric energy metering processing chip, and the other end thereof is connected to the signal transmission end of the processing unit;

[0028] One end of the electric energy metering signal receiving protection unit is connected to the signal transmission end of the electric energy metering processing chip, and the other end thereof is connected to the signal receiving end of the processing unit;

[0029] Both ends of the electric energy metering test protection unit are respectively connected to the test end of the electric energy metering processing chip and the test end of the load circuit.

[0030] Further, the electrolytic capacitor energy storage type relay driving circuit for the electricity meter and the terminal device further includes: a charging control unit;

[0031] The first input end of the charging control unit is used to connect to the power supply end, the second input end of the charging control unit is communicatively connected to the processing unit, and the output end of the charging control unit is connected to the input end of the electrolytic capacitor energy storage unit.

[0032] Further, the charging control unit includes: a charging control chip, a transformer, a charging output module, and a power input protection module;

[0033] The secondary coil of the transformer is connected to the AC voltage input end of the charging control chip, and the primary coil of the transformer is used to connect to the power supply end;

[0034] The first end of the charging output module is connected to the positive output terminal and the negative output terminal of the charging control chip. The second end of the charging output module is connected to the electrolytic capacitor energy storage unit. The third end of the charging output module is connected to the processing unit;

[0035] The power input protection module includes: a fourth resistor, a first thermistor, and a second thermistor;

[0036] Both ends of the fourth resistor are respectively connected to the zero line of the power supply terminal and one end of the primary coil of the transformer;

[0037] One end of the first thermistor is connected in parallel between the fourth resistor and the zero line of the power supply terminal, and the other end is connected in parallel between the live line of the power supply terminal and the other end of the primary coil of the transformer;

[0038] One end of the second thermistor is connected in parallel between the live line of the power supply terminal and the other end of the primary coil of the transformer, and the other end is connected in parallel between one end of the primary coil of the transformer and the fourth resistor.

[0039] Further, the charging output module includes: a MOS transistor and a charging control triode;

[0040] The source electrode of the MOS is connected to the positive output terminal of the charging control chip, and its drain electrode is connected to the electrolytic capacitor energy storage unit; the emitter of the charging control triode is connected to the negative output terminal of the charging control chip, its base is connected to the processing unit, and its collector is connected to the gate of the MOS transistor.

[0041] Implementing the embodiments of the present invention will have the following beneficial effects:

[0042] The electrolytic capacitor energy storage type relay driving circuit for the electric meter and the terminal device proposed by the present invention stores electrical energy through the electrolytic capacitor energy storage unit, uses the processing unit to control the charging process of the electrolytic capacitor energy storage unit, and then the driving unit uses the electrical energy stored in the electrolytic capacitor energy storage unit to quickly drive the electric pull-in relay; thereby reducing the energy consumed by the operation of the electric pull-in relay and improving the response speed of the electric pull-in relay for the electrolytic capacitor energy storage type relay driving circuit for the electric meter and the terminal device. Description of the Drawings

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Wherein:

[0045] Figure 1 is the connection principle block diagram of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0046] Figure 2 is the circuit connection diagram of the electrolytic capacitor energy storage unit and the drive unit of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0047] Figure 3 is the circuit connection diagram of the electric pull-in relay of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0048] Figure 4 is the circuit connection diagram of the electric energy metering unit of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0049] Figure 5 is the circuit connection diagram of the electric energy metering signal transmission protection unit of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0050] Figure 6 is the circuit connection diagram of the electric energy metering signal receiving protection unit of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0051] Figure 7 is the circuit connection diagram of the electric energy metering test protection unit of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0052] Figure 8 is the circuit connection diagram of the charging control unit of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0053] Figure 9 is the circuit connection diagram of the charging control chip and the charging output module of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0054] Figure 10 is the circuit connection diagram of the power input protection module of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model;

[0055] Figure 11This is a circuit connection diagram of the processing chip of the processing unit of the electrolytic capacitor energy storage type relay drive circuit for the electric meter and terminal equipment in an embodiment of the present utility model.

[0056] Reference numerals:

[0057] 10. Processing unit; 20. Electrolytic capacitor energy storage unit; 21. First resistor; 22. First capacitor; 30. Driving unit; 31. First triode; 32. Second triode; 33. Third triode; 34. Fourth triode; 35. First driving output terminal; 36. Second driving output terminal; 37. Second resistor; 38. Third resistor; 39. TVS tube; 40. Electric pull-in relay; 50. First parallel point; 60. Second parallel point; 70. Electric energy metering unit; 71. Electric energy metering processing chip; 72. Electric energy metering signal transmission protection unit; 721. First transmission protection resistor; 722. First optocoupler; 7221. First light emitting element; 7222. First light receiving element; 723. Second transmission protection resistor; 73. Electric energy metering signal receiving protection unit; 731. First receiving protection resistor; 732. Second optocoupler; 7321. Second light emitting element; 7322. Second light receiving element; 733. Second receiving protection resistor; 734. Receiving protection capacitor; 74. Electric energy metering test protection unit; 741. First electric energy test resistor; 742. Second electric energy test resistor; 743. First test parallel resistor; 744. First test parallel capacitor; 80. Charging control unit; 81. Charging control chip; 82. Transformer; 83. Charging output module; 831. MOS tube; 832. Charging control triode; 833. First charging output resistor; 834. Second charging output resistor; 835. Third charging output resistor; 836. Fourth charging output resistor; 837. Fifth charging output resistor; 838. Charging output diode; 84. Power input protection module; 841. Fourth resistor; 842. First thermistor; 843. Second thermistor. Detailed implementation manners

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish different objects and are not used to describe a specific order. The cold water mentioned in the specification and claims of the present utility model includes normal temperature water.

[0059] As used herein, the term "embodiment" means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present utility model. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0060] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

[0061] Referring to Figures 1 to 11 , a first embodiment of the present application provides an electrolytic capacitor energy storage type relay driving circuit for an electric meter and a terminal device. The electrolytic capacitor energy storage type relay driving circuit for an electric meter and a terminal device includes: a processing unit 10, an electrolytic capacitor energy storage unit 20, a driving unit 30, and an electric pull-in and pull-out relay 40;

[0062] The input end of the electrolytic capacitor energy storage unit 20 is connected to the processing unit 10 and is used to connect to a power supply end to control the process of charging the electrolytic capacitor energy storage unit 20 by the power supply end.

[0063] The first input end of the driving unit 30 is connected to the electrolytic capacitor energy storage unit 20 or the power supply end, and its second input end and third input end are communicatively connected to the processing unit 10;

[0064] The first input end JA of the electric pull-in and pull-out relay 40 indirectly conducts the first input end, second input end, and third input end of the driving unit 30 by connecting to the first output end of the driving unit 30. The second input end JB of the electric pull-in and pull-out relay 40 indirectly conducts the first input end, second input end, and third input end of the driving unit 30 by connecting to the second output end of the driving unit 30. The output end of the electric pull-in and pull-out relay 40 is used to connect to a load circuit.

[0065] In this embodiment, the input end of the electrolytic capacitor energy storage unit 20 is connected to the processing unit 10, so that the electrolytic capacitor energy storage unit 20 receives the control signal of the processing unit 10. The electrolytic capacitor energy storage unit 20 is also connected to the power supply end. With the help of the processing unit 10, the power supply end intelligently provides electric energy to the electrolytic capacitor energy storage unit 20 according to the control instruction of the processing unit 10, ensuring that the electrolytic capacitor energy storage unit 20 works under a safe and efficient condition.

[0066] The driving unit 30 controls whether the electrolytic capacitor energy storage unit 20 is enabled by processing the level signal sent by the processing unit 10, that is, controls whether the electrolytic capacitor energy storage unit 20 supplies power to the electric pull-in relay 40 or the power supply terminal supplies power to the electric pull-in relay 40; this facilitates the quick response of the electric pull-in relay 40, reduces the waiting time of the electric pull-in relay 40 for the power supply terminal to start power supply, and can also utilize the electrolytic capacitor energy storage unit 20 to store the excess electric energy when the power supply terminal supplies power to the electric pull-in relay 40.

[0067] In summary, the electrolytic capacitor energy storage type relay driving circuit for the electricity meter and terminal device reduces the energy consumed by the operation of the electric pull-in relay 40 and improves the response speed of the electric pull-in relay 40.

[0068] Refer to Figure 2 , the electrolytic capacitor energy storage unit 20 includes: a first resistor 21 and a first capacitor 22;

[0069] One end of the first resistor 21 is connected to the processing unit 10 and is used for connecting to the power supply terminal; the other end is connected to the first input terminal of the driving unit 30.

[0070] One end of the first capacitor 22 is connected in parallel between the first resistor 21 and the driving unit 30, and the other end is used for connecting to the ground terminal.

[0071] Specifically, the first capacitor 22 is an electrolytic capacitor.

[0072] Specifically, one end of the first resistor 21 is connected to the processing unit 10 and is used for connecting to the power supply terminal, that is: the VCC terminal of the first resistor 21 is connected to the processing unit 10 and is used for connecting to the power supply terminal.

[0073] In this embodiment, the first resistor 21 functions as a current limiter. The first resistor 21 is used to prevent excessive inrush current when the power supply terminal charges the first capacitor 22 and also prevent excessive inrush current when the power supply terminal supplies power to the driving unit 30; the first capacitor 22 is used to store the electric energy provided by the power supply terminal for starting the driving unit 30 to indirectly control the opening and closing of the electric pull-in relay 40.

[0074] Refer to Figure 2 , the driving unit 30 includes: a first triode 31, a second triode 32, a third triode 33, a fourth triode 34, a first driving output terminal 35 and a second driving output terminal 36;

[0075] The emitter E of the first triode 31 is connected to the other end of the first resistor 21;

[0076] The emitter E of the second triode 32 is connected to the other end of the first resistor 21;

[0077] The collector C of the third triode 33 is respectively connected to the collector C of the first triode 31 and the base B of the second triode 32. The emitter E of the third triode 33 is used to connect to the ground terminal, and the base B of the third triode 33 is communicatively connected to the processing unit 10;

[0078] The collector C of the fourth triode 34 is respectively connected to the collector C of the second triode 32 and the base B of the first triode 31. The emitter E of the fourth triode 34 is used to connect to the ground terminal, and the base B of the fourth triode 34 is communicatively connected to the processing unit 10;

[0079] The input end of the first drive output terminal 35 is connected in parallel between the base B of the second triode 32 and the collector C of the third triode 33, and the output end of the first drive output terminal 35 is connected to the first input end JA of the electric pull-in relay 40;

[0080] The input end of the second drive output terminal 36 is connected in parallel between the base B of the first triode 31 and the collector C of the fourth triode 34, and the output end of the second drive output terminal 36 is connected to the second input end JB of the electric pull-in relay 40.

[0081] Specifically, the base of the third triode 33 being communicatively connected to the processing unit 10 means that the base of the third triode 33 is communicatively connected to the RelayOn pin of the processing unit 10. The base of the fourth triode 34 being communicatively connected to the processing unit 10 means that the base of the fourth triode 34 is communicatively connected to the RelayOff pin of the processing unit 10.

[0082] In this embodiment, the processing unit 10 controls the on or off conduction states of the first triode 31, the second triode 32, the third triode 33, and the fourth triode 34 through control signals; thereby achieving precise control of the electric pull-in relay 40.

[0083] When the third triode 33 is conducting, the third triode 33 pulls down the base voltage of the second triode 32, causing the second triode 32 to be cut off, and further causing the second triode 32 to send a low-level signal to the first drive terminal; when the third triode 33 is cut off, the third triode 33 does not pull down the base voltage of the second triode 32, so the second triode 32 is conducting, and further causing the second triode 32 to send a high-level signal to the first drive terminal.

[0084] Similarly, when the fourth triode 34 conducts, the fourth triode 34 pulls down the base voltage of the first triode 31, causing the first triode 31 to turn off and then on, and further causing the first triode 31 to send a low-level signal to the second drive terminal; when the fourth triode 34 turns off and conducts, the fourth triode 34 does not pull down the base voltage of the first triode 31, so the first triode 31 conducts, and further causes the first triode 31 to send a high-level signal to the second drive terminal.

[0085] Specifically, the first triode 31 and the second triode 32 are both PNP-type triodes. The third triode 33 and the fourth triode 34 are both NPN-type triodes.

[0086] Reference Figure 2 Furthermore, the drive unit 30 further includes: a first communication protection resistor R301 and a second communication protection resistor R302.

[0087] One end of the first communication protection resistor R301 is connected to the base B of the third triode 33, and the RelayOn end of the first communication protection resistor R301 is connected to the RelayOn pin of the processing unit 10. One end of the second communication protection resistor R302 is connected to the base B of the fourth triode 34, and the RelayOff end of the second communication protection resistor R302 is connected to the RelayOff pin of the processing unit 10.

[0088] Reference Figure 3 Furthermore, the first input terminal JA of the electric pull-in relay 40 is the 1 pin of the electric pull-in relay 40, and the second input terminal JB of the electric pull-in relay 40 is the 2 pin of the electric pull-in relay 40. The 3 pin, 4 pin, and 5 pin of the electric pull-in relay 40 are used to connect the load circuit.

[0089] Reference Figure 3 Furthermore, the electrolytic capacitor energy storage type relay drive circuit for the meter and terminal device further includes a relay protection resistor R401 and a relay protection capacitor C402. One end of the relay protection resistor R401 is connected in parallel to the 1 pin of the electric pull-in relay 40, the other end of the relay protection resistor R401 is connected in parallel to one end of the relay protection capacitor C402, and the other end of the relay protection capacitor C402 is connected in parallel to the 2 pin of the electric pull-in relay 40.

[0090] Refer to Figure 2 The input end of the second drive output terminal 36 is connected in parallel between the base of the first triode 31 and the collector of the fourth triode 34 to form a first parallel point 50, and the input end of the first drive output terminal 35 is connected in parallel between the base of the second triode 32 and the collector of the third triode 33 to form a second parallel point 60;

[0091] The driving unit 30 further includes: a second resistor 37 and a third resistor 38;

[0092] Two ends of the second resistor 37 are respectively connected to the base of the second triode 32 and the second parallel point 60;

[0093] Two ends of the third resistor 38 are respectively connected to the base of the first triode 31 and the first parallel point 50.

[0094] In this embodiment, the second resistor 37 and the third resistor 38 play a role in current-limiting protection. The second resistor 37 is further used to adjust the sensitivity of the base voltage of the second triode 32 and provide a stable voltage reference to ensure that the second triode 32 and the third triode 33 operate within the correct voltage range; the third resistor 38 is further used to adjust the sensitivity of the base voltage of the first triode 31 and provide a stable voltage reference to ensure that the first triode 31 and the fourth triode 34 operate within the correct voltage range.

[0095] The second resistor 37 plays a role in current-limiting protection for the circuit between the base of the second triode 32 and the second parallel point 60, preventing the second triode 32 from providing an excessive impact current to the third triode 33 and preventing the second triode 32 from providing an excessive impact current to the first drive output terminal 35.

[0096] The third resistor 38 plays a role in current-limiting protection for the circuit between the base of the first triode 31 and the first parallel point 50, preventing the first triode 31 from providing an excessive impact current to the fourth triode 34 and preventing the first triode 31 from providing an excessive impact current to the second drive output terminal 36.

[0097] Refer to Figure 2 , the driving unit 30 further includes a TVS tube 39; two ends of the TVS tube 39 are respectively connected to the first parallel point 50 and the second parallel point 60.

[0098] In this embodiment, the TVS tube 39 is used to provide a stable voltage reference between the first parallel point 50 and the second parallel point 60, that is, to provide a stable voltage reference between the input end of the first drive output terminal 35 and the input end of the second drive output terminal 36.

[0099] Refer to Figures 4 to 7 , the electrolytic capacitor energy storage type relay driving circuit for the electricity meter and the terminal device further includes: an electric energy metering unit 70;

[0100] The signal end of the electric energy metering unit 70 is communicatively connected to the processing unit 10, and the measuring end of the electric energy metering unit 70 is used to connect to the load circuit.

[0101] In this embodiment, the power measurement unit 70 is used to measure the power consumption of the load circuit in real time. The processing unit 10 receives the data of the power measurement unit 70 and issues corresponding instructions to the electrolytic capacitor energy storage unit 20 and the driving unit 30 according to the output.

[0102] When there is power consumption in the load circuit, it indicates that the load circuit is in the working state. The processing unit 10 will issue corresponding instructions to the driving unit 30 to ensure that the load circuit maintains the working state and avoid the malfunction and interruption of the load circuit in the working state. The processing unit 10 may also issue corresponding instructions to the electrolytic capacitor energy storage unit 20 to control whether the electrolytic capacitor energy storage unit 20 is in the energy storage state or the discharge state.

[0103] Refer to Figure 4 , the measurement terminals of the power measurement unit 70 include a first measurement pin CON1, a second measurement pin CON2, and a third measurement pin UN.

[0104] Refer to Figures 4 to 7 , the power measurement unit 70 includes: a power measurement processing chip 71, a power measurement signal transmission protection unit 72, a power measurement signal reception protection unit 73, and a power measurement test protection unit 74;

[0105] One end of the power measurement signal transmission protection unit 72 is connected to the signal reception end of the power measurement processing chip 71, and the other end is connected to the signal transmission end of the processing unit 10;

[0106] One end of the power measurement signal reception protection unit 73 is connected to the signal transmission end of the power measurement processing chip 71, and the other end is connected to the signal reception end of the processing unit 10;

[0107] Both ends of the power measurement test protection unit 74 are respectively connected to the test end of the power measurement processing chip 71 and the test end of the load circuit.

[0108] In this embodiment, the power measurement signal transmission protection unit 72 is used to protect the signal transmitted from the processing unit 10 to the power measurement processing chip 71 to avoid the signal being interfered with or damaged.

[0109] The power measurement signal reception protection unit 73 is used to protect the signal transmitted from the power measurement processing chip 71 to the processing unit 10 to avoid the signal being interfered with or damaged and ensure the integrity and accuracy of the signal.

[0110] Use the first power metering test protection unit 74 to protect the connection between the power metering processing chip 71 and the first test end of the load circuit, and use the second power metering test protection unit 74 to protect the connection between the power metering processing chip 71 and the second test end of the load circuit to ensure the accuracy and security of the test signal.

[0111] Further based on this embodiment, the power metering signal transmission protection unit 72 includes a first transmission protection resistor 721, a first optocoupler 722, and a second transmission protection resistor 723;

[0112] The first optocoupler 722 includes a first light emitting component 7221 and a first light receiving component 7222; one end of the first light emitting component 7221 is used to connect to the 5V power supply terminal, and the other end of the first light emitting component 7221 is connected to the processing unit 10 through the series connection of the first transmission protection resistor 721;

[0113] One end of the first light receiving component 7222 is used to connect to the ground terminal, and the other end of the first light receiving component 7222 is connected to the power metering processing chip 71;

[0114] One end of the second transmission protection resistor 723 is connected in parallel between the first light receiving component 7222 and the power metering processing chip 71, and the other end of the second transmission protection resistor 723 is used to connect to the 5V power supply terminal.

[0115] Refer to Figure 4 and Figure 5 Specifically, the other end of the second transmission protection resistor 723 is used to connect to the 5V power supply terminal, that is, in the figure: the other end of the second transmission protection resistor 723 is used for the VCC5V_Meter power supply terminal. One end of the first light emitting component 7221 is used to connect to the 5V power supply terminal, that is: the VCC5V terminal of the first light emitting component 7221 is used to connect to the 5V power supply terminal.

[0116] The other end of the first light emitting component 7221 is connected to the processing unit 10 through the series connection of the first transmission protection resistor 721, that is: the METER_IC_TX terminal of the first light emitting component 7221 is connected to the METER_IC_TX terminal of the processing unit 10 through the series connection of the first transmission protection resistor 721.

[0117] Specifically, the other end of the first light receiving component 7222 is connected to the power metering processing chip 71, that is: the other end of the first light receiving component 7222 is connected to the RX pin of the power metering processing chip 71.

[0118] Further based on this embodiment, the power metering signal receiving protection unit 73 includes a first receiving protection resistor 731, a second optocoupler 732, a second receiving protection resistor 733, and a receiving protection capacitor 734;

[0119] The second optical coupler 732 includes a second optical emitter 7321 and a second optical receiver 7322; one end of the second optical receiver 7322 is connected to the processing unit 10, and the other end of the second optical receiver 7322 is used to connect to the ground terminal; one end of the second optical emitter 7321 is used to connect to the 5V power supply terminal, and the other end of the second optical emitter 7321 is connected to the power metering processing chip 71 through the series connection of the second receiving protection resistor 733;

[0120] One end of the first receiving protection resistor 731 is connected in parallel between the second optical receiver 7322 and the processing unit 10, and the other end of the first receiving protection resistor 731 is used to connect to the 5V power supply terminal;

[0121] The second receiving protection resistor 733 is connected in series between the second optical emitter 7321 and the power metering processing chip 71;

[0122] One end of the receiving protection capacitor 734 is connected in parallel between the second optical receiver 7322 and the processing unit 10, and the other end of the receiving protection capacitor 734 is used to connect to the ground terminal.

[0123] Referring to Figure 4 and Figure 6 , specifically, one end of the second optical emitter 7321 is used to connect to the 5V power supply terminal, that is, in the figure: the other end of the second optical emitter 7321 is used to connect to the VCC5V_Meter power supply terminal. The other end of the first receiving protection resistor 731 is used to connect to the 5V power supply terminal, that is, in the figure: the other end of the first receiving protection resistor 731 is used to connect to the VCC5V power supply terminal.

[0124] One end of the second optical receiver 7322 is connected to the processing unit 10, that is: the METER_IC_RX terminal of the second optical receiver 7322 is connected to the METER_IC_RX terminal of the processing unit 10.

[0125] Specifically, the second receiving protection resistor 733 is connected in series between the second optical emitter 7321 and the power metering processing chip 71, that is: the second receiving protection resistor 733 is connected in series between the second optical emitter 7321 and the TX pin of the power metering processing chip 71.

[0126] Further based on this embodiment, the power metering test protection unit 74 includes a first power test resistor 741, a second power test resistor 742, a first test parallel resistor 743 and a first test parallel capacitor 744;

[0127] The V1P pin of the power metering processing chip 71 is connected to one of the test terminals of the load circuit through a series connection of the first power test resistor 741, and the V1N pin of the power metering processing chip 71 is connected to the other test terminal of the load circuit through a series connection of the second power test resistor 742;

[0128] One end of the first test parallel resistor 743 is connected in parallel between the first power test resistor 741 and one of the test terminals of the load circuit, and one end of the first test parallel capacitor 744 is connected in parallel between the V1P pin of the power metering processing chip 71 and the first power test resistor 741;

[0129] The other end of the first test parallel resistor 743 is connected in parallel between the second power test resistor 742 and the other test terminal of the load circuit, and the other end of the first test parallel capacitor 744 is connected in parallel between the V1N pin of the power metering processing chip 71 and the second power test resistor 742.

[0130] Specifically, the first test parallel resistor 743 is formed by a series connection of at least one resistor. The first test parallel capacitor 744 is formed by a series connection of at least one capacitor.

[0131] Refer to Figure 4 and Figure 7 , specifically, the V1P pin of the power metering processing chip 71 is connected to one of the test terminals of the load circuit through a series connection of the first power test resistor 741, that is: the V1P pin of the power metering processing chip 71 is connected to the first measurement pin CON1 through a series connection of the first power test resistor 741, and the P1 measurement terminal of the first measurement pin CON1 is connected to one of the test terminals of the first load circuit.

[0132] One end of the first test parallel resistor 743 is connected in parallel between the first power test resistor 741 and one of the test terminals of the load circuit, that is: one end of the first test parallel resistor 743 is connected in parallel between the first power test resistor 741 and the P1 measurement terminal, and the P1 measurement terminal is connected to one of the test terminals of the first load circuit.

[0133] The other end of the first test parallel resistor 743 is connected in parallel between the second power test resistor 742 and the other test terminal of the load circuit, that is: the other end of the first test parallel resistor 743 is connected in parallel between the second power test resistor 742 and the N1 measurement terminal, and the N1 measurement terminal is connected to the other test terminal of the load circuit.

[0134] Based on a further implementation of this embodiment, the first test parallel resistor 743 includes a first parallel resistor R744, a second parallel resistor R745, and a third parallel resistor R746. The first test parallel capacitor 744 includes a first parallel capacitor C741 and a second parallel capacitor C742.

[0135] One end of the first parallel resistor R744 is connected in parallel between the first power measurement resistor 741 and the first measurement pin CON1, and one end of the second parallel resistor R745 is connected in parallel between the second power measurement resistor 742 and the N1 measurement terminal; the other ends of the first parallel resistor R744 and the second parallel resistor R745 are both connected to the ground terminal.

[0136] One end of the third parallel resistor R746 is connected in parallel between the first power measurement resistor 741 and the first measurement pin CON1, and the other end of the third parallel resistor R746 is connected in parallel between the second power measurement resistor 742 and the N1 measurement terminal.

[0137] One end of the first parallel capacitor C741 is connected in parallel between the V1P pin of the power metering processing chip 71 and the first power measurement resistor 741, and one end of the second parallel capacitor C742 is connected in parallel between the V1N pin of the power metering processing chip 71 and the second power measurement resistor 742; the other ends of the first parallel capacitor C741 and the second parallel capacitor C742 are both connected to the ground terminal.

[0138] Refer to Figure 4 , based on the further improvement of this embodiment, the electrolytic capacitor energy storage type relay drive circuit for the electric meter and the terminal device further includes a second power metering test protection unit and a third power metering test protection unit.

[0139] The second power metering test protection unit includes a third power measurement resistor R704, a fourth power measurement resistor R705, a second test parallel resistor, and a second test parallel capacitor. The second test parallel resistor includes a fourth parallel resistor R706 and a fifth parallel resistor R707. The second test parallel capacitor includes a third parallel capacitor C706 and a fourth parallel capacitor C707.

[0140] The V2P pin of the power metering processing chip 71 is connected to the 1 pin of the second measurement pin CON2 through the series connection of the third power measurement resistor R704, and the V2N pin of the power metering processing chip 71 is connected to the 2 pin of the second measurement pin CON2 through the series connection of the fourth power measurement resistor R705; the second measurement pin CON2 is connected to the test terminal of the second load circuit.

[0141] One end of the fourth parallel resistor R706 is connected in parallel between the third power measurement resistor R704 and the 1 pin of the second measurement pin CON2, and one end of the fifth parallel resistor R707 is connected in parallel between the fourth power measurement resistor R705 and the 2 pin of the second measurement pin CON2; the other ends of the fourth parallel resistor R706 and the fifth parallel resistor R707 are both connected to the ground terminal.

[0142] One end of the third parallel capacitor C706 is connected in parallel between the V2P pin of the power metering processing chip 71 and the third power test resistor R704, and one end of the fourth parallel capacitor C707 is connected in parallel between the V2N pin of the power metering processing chip 71 and the fourth power test resistor R705; the other ends of the third parallel capacitor C706 and the fourth parallel capacitor C707 are both connected to the ground terminal.

[0143] The third power metering test protection unit includes a fifth power test resistor, a first power test protection resistor R708, a second power test protection resistor R715, a first power test protection capacitor C708, and a second power test protection capacitor C709. The fifth power test resistor includes a plurality of resistors connected in series, such as resistor R709, resistor R710, resistor R711, resistor R712, resistor R713, and resistor R714.

[0144] One end of the fifth power test resistor is connected to the V3P pin of the power metering processing chip 71, and the other end of the fifth power test resistor is connected to the third measurement pin UN, and the third measurement pin UN is used to connect the test end of the third load circuit.

[0145] Both ends of the first power test protection resistor R708 are respectively connected to the V3P pin of the power metering processing chip 71 and the ground terminal. Both ends of the first power test protection capacitor C708 are respectively connected to the V3P pin of the power metering processing chip 71 and the ground terminal. Both ends of the second power test protection resistor R715 are respectively connected to the V3N pin of the power metering processing chip 71 and the ground terminal. Both ends of the second power test protection capacitor C709 are respectively connected to the V3N pin of the power metering processing chip 71 and the ground terminal.

[0146] The REFV pin of the power metering processing chip 71 is connected to the ground terminal through a series connection of a first protection capacitor C710 and a second protection capacitor C711, and the first protection capacitor C710 and the second protection capacitor C711 are arranged in parallel with each other.

[0147] The GND pin of the power metering processing chip 71 is directly connected to the ground terminal, and is also connected to the VCC5V_Meter power supply terminal through a series connection of a third protection capacitor C713.

[0148] The DVVD pin of the power metering processing chip 71 is connected to the DVDD power supply terminal.

[0149] Refer to Figure 4, the electrolytic capacitor energy storage relay driving circuit for the electric meter and terminal device further includes: a fourth protection capacitor C712 and a first protection resistor R716. One end of the fourth protection capacitor C712 is connected in parallel between the DVVD pin of the electric energy metering processing chip 71 and the DVDD power supply terminal, and the other end of the fourth protection capacitor C712 is connected to the ground terminal. One end of the first protection resistor R716 is connected in parallel between the DVVD pin of the electric energy metering processing chip 71 and the DVDD power supply terminal, and the other end of the first protection resistor R716 is connected in parallel between the third protection capacitor C713 and the VCC5V_Meter power supply terminal.

[0150] Refer to Figure 4 , the electrolytic capacitor energy storage relay driving circuit for the electric meter and terminal device further includes: a first crystal oscillator Y200, a fifth protection capacitor C701 and a sixth protection capacitor C702; The 1-pin of the first crystal oscillator Y200 is connected to the OSCO pin of the electric energy metering processing chip 71, the 2-pin of the first crystal oscillator Y200 is connected to the OSCI pin of the electric energy metering processing chip 71, and the 3-pin of the first crystal oscillator Y200 is connected to the ground terminal.

[0151] One end of the fifth protection capacitor C701 is connected in parallel between the 1-pin of the first crystal oscillator Y200 and the OSCO pin of the electric energy metering processing chip 71, and one end of the sixth protection capacitor C702 is connected in parallel between the 2-pin of the first crystal oscillator Y200 and the OSCI pin of the electric energy metering processing chip 71. The other ends of the fifth protection capacitor C701 and the sixth protection capacitor C702 are both connected to the ground terminal.

[0152] Refer to Figure 4 , the electrolytic capacitor energy storage relay driving circuit for the electric meter and terminal device further includes: a second protection resistor R701, a third optocoupler E701, a third protection resistor R702, a seventh protection capacitor C703 and an eighth protection capacitor C704.

[0153] The third optocoupler E701 includes a third light emitting component and a third light receiving component. One end of the third light emitting component is connected to the PF pin of the electric energy metering processing chip 71 through a series connection of the second protection resistor R701, and the other end of the third light emitting component is connected to the ground terminal. One end of the third light receiving component is connected to the VCC5V power supply terminal, and the other end of the third light receiving component is connected to the ground terminal through a series connection of the third protection resistor R702 and the seventh protection capacitor C703, and the third protection resistor R702 and the seventh protection capacitor C703 are connected in parallel.

[0154] One end of the eighth protection capacitor C704 is connected in parallel between the third light receiving component and the VCC5V power supply terminal, and the other end of the eighth protection capacitor C704 is connected to the ground terminal.

[0155] Open connection setting for the QF pin of the electric energy metering processing chip 71.

[0156] Refer to Figure 4 , the electrolytic capacitor energy storage type relay driving circuit for the electric meter and terminal device further includes: a ninth protection capacitor C705. The AVDD pin of the electric energy metering processing chip 71 is connected to the VCC5V_Meter power supply terminal through a series connection of a fourth protection resistor R703. One end of the ninth protection capacitor C705 is connected in parallel between the AVDD pin of the electric energy metering processing chip 71 and the fourth protection resistor R703, and the other end of the ninth protection capacitor C705 is connected to the ground terminal.

[0157] Refer to Figures 8 to 10 , the electrolytic capacitor energy storage type relay driving circuit for the electric meter and terminal device further includes: a charging control unit 80;

[0158] The first input terminal of the charging control unit 80 is used to connect to the power supply terminal, the second input terminal of the charging control unit 80 is communicatively connected to the processing unit 10, and the output terminal of the charging control unit 80 is connected to the input terminal of the electrolytic capacitor energy storage unit 20.

[0159] In this embodiment, the charging process of the electrolytic capacitor energy storage unit 20 is controlled by the charging control unit 80.

[0160] Refer to Figures 8 to 10 , the charging control unit 80 includes: a charging control chip 81, a transformer 82, a charging output module 83, and a power input protection module 84;

[0161] The secondary coil of the transformer 82 is connected to the AC voltage input terminal AC of the charging control chip 81, and the primary coil of the transformer 82 is used to connect to the power supply terminal;

[0162] The first end of the charging output module 83 is connected to the positive output terminal and the negative output terminal of the charging control chip 81, the second end of the charging output module 83 is connected to the electrolytic capacitor energy storage unit 20, and the third end of the charging output module 83 is connected to the processing unit 10;

[0163] The power input protection module 84 includes: a fourth resistor 841, a first thermistor 842, and a second thermistor 843;

[0164] Both ends of the fourth resistor 841 are respectively connected to the neutral line N of the power supply terminal and one end of the primary coil of the transformer 82;

[0165] One end of the first thermistor 842 is connected in parallel between the fourth resistor 841 and the neutral line N of the power supply terminal, and the other end is connected in parallel between the live wire L of the power supply terminal and the other end of the primary coil of the transformer 82;

[0166] One end of the second thermistor 843 is connected in parallel between the live wire L of the power supply terminal and the other end of the primary coil of the transformer 82, and the other end is connected in parallel between one end of the primary coil of the transformer 82 and the fourth resistor 841.

[0167] Specifically, the second end of the charging output module 83 is connected to the electrolytic capacitor energy storage unit 20, that is: the VCC terminal of the charging output module 83 is connected to the VCC terminal of the first resistor 21.

[0168] In this embodiment, the charging control chip 81 is responsible for managing and controlling the charging process; the transformer 82 is used for voltage conversion to convert the input voltage into a suitable charging voltage, and the charging output module 83 transmits the voltage and current output by the charging control chip 81 to the electrolytic capacitor energy storage unit 20 or to the driving unit 30; the power input protection module 84 processes the input current and voltage to prevent the circuit from being affected by abnormal current or voltage.

[0169] The fourth resistor 841 is used to limit current or divide voltage, and the first thermistor 842 and the second thermistor 843 are used to detect whether there is overcurrent or overheating, and limit the current or provide overheat protection when necessary.

[0170] Refer to Figures 8 to 10 , specifically, the 1-pin, 4-pin, and 5-pin of the transformer 82 are left unconnected.

[0171] Both ends of the fourth resistor 841 are respectively connected to the neutral line N of the power supply terminal and one end of the primary coil of the transformer 82, that is: both ends of the fourth resistor 841 are respectively connected to the neutral line N of the power supply terminal and the 2-pin of the primary coil of the transformer 82.

[0172] The 3-pin of the transformer 82 is connected to the live wire L of the power supply terminal.

[0173] The 6-pin of the transformer 82 is connected to the 2-pin of the AC voltage input terminal AC of the charging control chip 81, and the 7-pin of the transformer 82 is connected to the 1-pin of the AC voltage input terminal AC of the charging control chip 81.

[0174] The positive output terminal of the charging control chip 81 is the 3-pin of the charging control chip 81. The negative output terminal of the charging control chip 81 is the 4-pin of the charging control chip 81.

[0175] The charging control unit 80 further includes a charging electrolytic capacitor EC801 and a charging protection capacitor C802. One end of the charging electrolytic capacitor EC801 is connected to the VCC18V power supply terminal and is in parallel between the positive output terminal of the charging control chip 81 and the fourth charging output resistor 836; the other end of the charging electrolytic capacitor EC801 is connected to the ground terminal. One end of the charging protection capacitor C802 is in parallel between the positive output terminal of the charging control chip 81 and the fourth charging output resistor 836, and the other end of the charging protection capacitor C802 is in parallel between the emitter E of the charging control triode 832 and the ground terminal.

[0176] Referring Figures 8 to 10 , the charging output module 83 includes: an MOS transistor 831 and a charging control triode 832;

[0177] The source of the MOS is connected to the positive output terminal of the charging control chip 81, and its drain is connected to the electrolytic capacitor energy storage unit 20; the emitter of the charging control triode 832 is connected to the negative output terminal of the charging control chip 81, its base is connected to the processing unit 10, and its collector is connected to the gate of the MOS transistor 831.

[0178] In this embodiment, when the processing unit 10 decides that the electrolytic capacitor energy storage unit 20 enters the charging mode or the power supply terminal directly supplies power to the driving unit 30 through the charging control chip 81, the processing unit 10 sends a high-level signal (relative to the emitter) to the base of the charging control triode 832, causing the charging control triode 832 to conduct.

[0179] After the charging control triode 832 conducts, the current flows from the collector of the charging control triode 832 to the emitter, causing the gate voltage of the MOS transistor 831 to drop (relative to the source), thereby causing the MOS transistor 831 to conduct.

[0180] After the MOS conducts, the current can flow from the positive output terminal of the charging control chip 81 through the MOS transistor 831 to the electrolytic capacitor energy storage unit 20, enabling the electrolytic capacitor energy storage unit 20 to enter the charging mode or supply power to the driving unit 30.

[0181] When the processing unit 10 decides that the electrolytic capacitor energy storage unit 20 exits the charging mode, enters the discharging mode, or stops the power supply terminal from directly supplying power to the driving unit 30 through the charging control chip 81, the processing unit 10 sends a low-level signal to the base of the charging control triode 832 to turn off the charging control triode 832.

[0182] After the charging control triode 832 is turned off, the gate voltage of the MOS transistor 831 rises, causing the MOS transistor 831 to turn off, thereby cutting off the charging current.

[0183] Further based on this embodiment, the charging output module 83 further includes a first charging output resistor 833, a second charging output resistor 834, a third charging output resistor 835, a fourth charging output resistor 836, a fifth charging output resistor 837, and a charging output diode 838;

[0184] One end of the first charging output resistor 833 is connected to the processing unit 10, and the other end is connected to the base B of the charging control triode 832;

[0185] One end of the second charging output resistor 834 is connected in parallel between the negative output terminal of the processing unit 10 and the first charging output resistor 833, and the other end is connected in parallel between the charging control chip 81 and the emitter E of the charging control triode 832;

[0186] One end of the third charging output resistor 835 is connected to the collector C of the charging control triode 832, and the other end is connected to the gate of the MOS transistor 831;

[0187] One end of the fourth charging output resistor 836 is connected to the positive output terminal of the charging control chip 81, and the other end is connected to the source of the MOS transistor 831;

[0188] One end of the fifth charging output resistor 837 is connected in parallel between the fourth charging output resistor 836 and the source of the MOS transistor 831, and the other end is connected in parallel between the third charging output resistor 835 and the gate of the MOS transistor 831;

[0189] The positive electrode of the charging output diode 838 is connected to the drain of the MOS transistor 831, and the negative electrode is connected to the electrolytic capacitor energy storage unit 20 or the driving unit 30.

[0190] Specifically, one end of the first charging output resistor 833 is connected to the processing unit 10, that is: the RelayPower terminal of the first charging output resistor 833 is connected to the RelayPower terminal of the processing unit 10.

[0191] The first charging output resistor 833, the second charging output resistor 834, the third charging output resistor 835, the fourth charging output resistor 836, the fifth charging output resistor 837, and the charging output diode 838 are used to ensure the safety of the charging output.

[0192] Specifically, the MOS transistor 831 is a P-channel MOS transistor.

[0193] Specifically, the negative electrode of the charging output diode 838 is connected to the electrolytic capacitor energy storage unit 20, that is: the negative electrode of the charging output diode 838 is connected to the VCC terminal of the first resistor 21.

[0194] Refer to Figure 11, Further, the CPLL pin of the processing unit 10 is connected to the ground terminal through a series connection of a first processing protection capacitor C101.

[0195] The VDD15 pin of the processing unit 10 is connected to the VDD15 power supply terminal through a series connection of a first processing protection resistor R101.

[0196] The electrolytic capacitor energy storage type relay drive circuit for the electricity meter and terminal device further includes: a second processing protection capacitor C102. One end of the second processing protection capacitor C102 is connected in parallel between the first processing protection resistor R101 and the VDD15 power supply terminal, and the other end of the second processing protection capacitor C102 is connected to the ground terminal.

[0197] The VDD pin of the processing unit 10 is connected to the VCC power supply terminal.

[0198] The electrolytic capacitor energy storage type relay drive circuit for the electricity meter and terminal device further includes: a third processing protection capacitor C103 and a fourth processing protection capacitor C104. One end of the third processing protection capacitor C103 and one end of the fourth processing protection capacitor C104 are both connected in parallel between the VDD pin of the processing unit 10 and the VCC power supply terminal; the other end of the third processing protection capacitor C103 and the other end of the fourth processing protection capacitor C104 are both connected to the ground terminal.

[0199] The VSS pin of the processing unit 10 is connected to the ground terminal.

[0200] The XTALIN pin of the processing unit 10 is connected to the ground terminal through a series connection of a fifth processing protection capacitor C105.

[0201] The XTALOUT pin of the processing unit 10 is connected to the ground terminal through a series connection of a sixth processing protection capacitor C106.

[0202] The electrolytic capacitor energy storage type relay drive circuit for the electricity meter and terminal device further includes: a second crystal oscillator Y101. One end of the second crystal oscillator Y101 is connected in parallel between the XTALIN pin of the processing unit 10 and the fifth processing protection capacitor C105; the other end of the second crystal oscillator Y101 is connected in parallel between the XTALOUT pin of the processing unit 10 and the sixth processing protection capacitor C106.

[0203] The PB4 pin of the processing unit 10 is connected to the ground terminal through a series connection of a seventh processing protection capacitor C107.

[0204] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all embodiments. The preferred embodiments of the present utility model are shown in the drawings, but they do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present utility model in other related technical fields shall be within the scope of the patent protection of the present utility model by the same token.

Claims

1. An electrolytic capacitor energy storage type relay driving circuit for an electric meter and a terminal device, characterized in that, Comprising: A processing unit; An electrolytic capacitor energy storage unit, the input end of the electrolytic capacitor energy storage unit is connected to the processing unit, and is used to connect to a power supply end to control the process of charging the electrolytic capacitor energy storage unit from the power supply end; A driving unit, the first input end of the driving unit is connected to the electrolytic capacitor energy storage unit or the power supply end, and its second input end and third input end are communicatively connected to the processing unit; An electrically actuated pull-in relay, the first input end of the electrically actuated pull-in relay indirectly conducts the first input end, the second input end and the third input end of the driving unit by connecting to the first output end of the driving unit, and the second input end of the electrically actuated pull-in relay indirectly conducts the first input end, the second input end and the third input end of the driving unit by connecting to the second output end of the driving unit, and the output end of the electrically actuated pull-in relay is used to connect to a load circuit.

2. The electrolytic capacitor energy storage type relay drive circuit for an electricity meter and a terminal device according to claim 1, characterized in that, The electrolytic capacitor energy storage unit includes: A first resistor, one end of the first resistor is connected to the processing unit and is used to connect to the power supply end; the other end is connected to the first input end of the driving unit; A first capacitor, one end of the first capacitor is connected in parallel between the first resistor and the driving unit, and the other end is used to connect to a ground end.

3. The electrolytic capacitor energy storage type relay driving circuit for an electric meter and a terminal device according to claim 2, characterized in that, The driving unit includes: A first triode, the emitter of the first triode is connected to the other end of the first resistor; A second triode, the emitter of the second triode is connected to the other end of the first resistor; A third triode, the collector of the third triode is respectively connected to the collector of the first triode and the base of the second triode, the emitter of the third triode is used to connect to a ground end, and the base of the third triode is communicatively connected to the processing unit; A fourth triode, the collector of the fourth triode is respectively connected to the collector of the second triode and the base of the first triode, the emitter of the fourth triode is used to connect to a ground end, and the base of the fourth triode is communicatively connected to the processing unit; A first driving output terminal, the input end of the first driving output terminal is connected in parallel between the base of the second triode and the collector of the third triode, and the output end of the first driving output terminal is connected to the first input end of the electrically actuated pull-in relay; A second driving output terminal, the input end of the second driving output terminal is connected in parallel between the base of the first triode and the collector of the fourth triode, and the output end of the second driving output terminal is connected to the second input end of the electrically actuated pull-in relay.

4. The electrolytic capacitor energy storage type relay driving circuit for an electricity meter and a terminal device according to claim 3, characterized in that, The input end of the second driving output terminal is connected in parallel between the base of the first triode and the collector of the fourth triode to form a first parallel point, and the input end of the first driving output terminal is connected in parallel between the base of the second triode and the collector of the third triode to form a second parallel point; The driving unit further includes: A second resistor, both ends of the second resistor are respectively connected to the base of the second triode and the second parallel point; A third resistor, both ends of the third resistor are respectively connected to the base of the first triode and the first parallel point.

5. The electrolytic capacitor energy storage type relay drive circuit for an electricity meter and a terminal device according to claim 4, wherein The driving unit further includes a TVS tube; two ends of the TVS tube are respectively connected to the first parallel connection point and the second parallel connection point.

6. The electrolytic capacitor energy storage type relay drive circuit for an electric meter and a terminal device according to claim 3, wherein, The electrolytic capacitor energy storage type relay driving circuit for the electric meter and the terminal device further includes: An electric energy metering unit, a signal end of the electric energy metering unit is communicatively connected to the processing unit, and a measuring end of the electric energy metering unit is used for connecting to the load circuit.

7. The electrolytic capacitor energy storage type relay drive circuit for an electric meter and a terminal device according to claim 6, wherein The electric energy metering unit includes: An electric energy metering processing chip; An electric energy metering signal transmission protection unit, one end of the electric energy metering signal transmission protection unit is connected to a signal receiving end of the electric energy metering processing chip, and the other end thereof is connected to a signal transmission end of the processing unit; An electric energy metering signal receiving protection unit, one end of the electric energy metering signal receiving protection unit is connected to a signal transmission end of the electric energy metering processing chip, and the other end thereof is connected to a signal receiving end of the processing unit; An electric energy metering test protection unit, two ends of the electric energy metering test protection unit are respectively connected to a test end of the electric energy metering processing chip and a test end of the load circuit.

8. The electrolytic capacitor energy storage type relay drive circuit for an electric meter and a terminal device according to claim 3, characterized in that, The electrolytic capacitor energy storage type relay driving circuit for the electric meter and the terminal device further includes: A charging control unit, a first input end of the charging control unit is used for connecting to the power supply end, a second input end of the charging control unit is communicatively connected to the processing unit, and an output end of the charging control unit is connected to an input end of the electrolytic capacitor energy storage unit.

9. The electrolytic capacitor energy storage type relay driving circuit for an electric meter and a terminal device according to claim 8, wherein The charging control unit includes: A charging control chip; A transformer, a secondary coil of the transformer is connected to an AC voltage input end of the charging control chip, and a primary coil of the transformer is used for connecting to the power supply end; A charging output module, a first end of the charging output module is connected to a positive output end and a negative output end of the charging control chip, a second end of the charging output module is connected to the electrolytic capacitor energy storage unit, and a third end of the charging output module is connected to the processing unit; A power input protection module, the power input protection module includes: A fourth resistor, two ends of the fourth resistor are respectively connected to a zero line of the power supply end and one end of the primary coil of the transformer; A first thermistor, one end of the first thermistor is connected in parallel between the fourth resistor and the zero line of the power supply end, and the other end thereof is connected in parallel between a live line of the power supply end and the other end of the primary coil of the transformer; A second thermistor, one end of the second thermistor is connected in parallel between the live line of the power supply end and the other end of the primary coil of the transformer, and the other end thereof is connected in parallel between one end of the primary coil of the transformer and the fourth resistor.

10. The electrolytic capacitor energy storage type relay drive circuit for an ammeter and a terminal device according to claim 9, wherein, The charging output module includes: A MOS tube, a source electrode of the MOS is connected to a positive output end of the charging control chip, and a drain electrode thereof is connected to the electrolytic capacitor energy storage unit; A charging control triode, an emitter of the charging control triode is connected to a negative output end of the charging control chip, a base thereof is connected to the processing unit, and a collector thereof is connected to a gate of the MOS tube.

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