An external control rate detection circuit

Abstract

The utility model provides an external control rate detection circuit, which includes a resistor RN2, a resistor RT1, a resistor RT2, a resistor RT3, a resistor RT4, a resistor RT5, a diode DT1, a diode DT3, an optocoupler DT2 and a capacitor CT1. The detection circuit is arranged between an external power generation device and a rate electric energy meter. When the external power generation device is externally connected, the external control rate signal IO_Rate_Test becomes a square wave signal of a fixed frequency. In this way, the rate electric energy meter can judge whether the external power generation device is connected through the waveform of the input external control rate signal IO_Rate_Test, thereby realizing the external control rate detection function.

Description

Technical Field

[0001] The present application relates to the technical field of electric energy meter detection circuits, and in particular to an external control rate detection circuit. Background Art

[0002] The rate energy meter is an electricity metering device used to measure household, commercial and industrial electricity consumption. It can effectively realize segmented billing and time-of-day billing, optimize electricity efficiency, thereby alleviating peak electricity load and balancing electricity load in different time periods. The time period rate plan is formulated according to the local electricity load curve. The rate energy meter measures the electricity in different time periods according to the local rate plan. The electricity consumption in different time periods corresponds to different electricity unit prices, which alleviates the tension in electricity supply during peak periods, balances the electricity load in different time periods through economic means, improves the utilization efficiency of power resources, reduces the burden on the power grid, saves energy, and reduces the electricity cost of users.

[0003] When a power system failure or peak electricity consumption occurs, in order to alleviate the electricity demand, in the prior art, it is usually necessary to connect an external power generation device to the outside of the electricity meter for power supply. Therefore, an external control rate detection circuit is required to detect whether an external power supply device is connected to realize the external control rate detection function. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides an external control rate detection circuit, including a resistor RN2, a resistor RT1, a resistor RT2, a resistor RT3, a resistor RT4, a resistor RT5, a diode DT1, a diode DT3, an optocoupler DT2 and a capacitor CT1; the two ends of the resistor RN2 are electrically connected to the first output end and the second output end of the external power generation equipment respectively; the positive electrode of the diode DT1 is electrically connected to the first output end of the external power generation equipment, and the negative electrode is electrically connected to one end of the resistor RT1; the other end of the resistor RT1 is electrically connected to one end of the resistor RT2; the other end of the resistor RT2 is electrically connected to one end of the resistor RT3; the other end of the resistor RT3 It is electrically connected to one end of the resistor RT4; the other end of the resistor RT4 is electrically connected to the cathode of the diode DT3 and the positive source electrode of the optocoupler DT2; the negative source electrode of the optocoupler DT2 is electrically connected to the anode of the diode DT3 and the second output end of the external power generation equipment; the secondary collector of the optocoupler DT2 is electrically connected to the external control rate signal IO_Rate_Test of the electric energy meter, and the secondary emitter is grounded; one end of the resistor RT5 is electrically connected to the power supply DVDD of the electric energy meter, and the other end is electrically connected to the external control rate signal IO_Rate_Test of the electric energy meter; one end of the capacitor CT1 is electrically connected to the external control rate signal IO_Rate_Test, and the other end is grounded.

[0005] In some embodiments of the present application, the resistor RN2 is a varistor, and the varistor voltage is 820V.

[0006] In some embodiments of the present application, the resistor RT1, the resistor RT2, the resistor RT3, and the resistor RT4 are chip resistors with a withstand voltage of 200V.

[0007] In some embodiments of the present application, the resistor RT5 is a chip resistor with a withstand voltage of 50V.

[0008] In some embodiments of the present application, the capacitor CT1 is a chip capacitor with a withstand voltage of 50V.

[0009] In some embodiments of the present application, the response time of the optical coupler DT2 is 4us.

[0010] In some embodiments of the present application, the non-repetitive peak reverse voltage of the diode DT1 and the diode DT3 is 100V.

[0011] Compared with the prior art, the utility model has the following advantages and beneficial effects: the external control rate detection circuit of the present application includes resistor RN2, resistor RT1, resistor RT2, resistor RT3, resistor RT4, resistor RT5, diode DT1, diode DT3, optocoupler DT2 and capacitor CT1. The detection circuit is arranged between the external power generation equipment and the rate electric energy meter. When the external power generation equipment is connected, the external control rate signal IO_Rate_Test becomes a square wave signal of a fixed frequency. In this way, the rate electric energy meter can judge whether the external power generation equipment is connected through the waveform of the input external control rate signal IO_Rate_Test, thereby realizing the external control rate detection function.

[0012] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings constituting a part of this document are used to provide a further understanding of this document. The exemplary embodiments and descriptions of this document are used to explain this document and do not constitute an improper limitation on this document. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of a circuit structure provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0016] The rate energy meter is an electricity metering device used to measure household, commercial and industrial electricity consumption. It can effectively realize segmented billing and time-of-day billing, optimize electricity efficiency, thereby alleviating peak electricity load and balancing electricity load in different time periods. The time period rate plan is formulated according to the local electricity load curve. The rate energy meter measures the electricity in different time periods according to the local rate plan. The electricity consumption in different time periods corresponds to different electricity unit prices, which alleviates the tension in electricity supply during peak periods, balances the electricity load in different time periods through economic means, improves the utilization efficiency of power resources, reduces the burden on the power grid, saves energy, and reduces the electricity cost of users.

[0017] When a power system failure or peak electricity consumption occurs, in order to alleviate the electricity demand, in the prior art, it is usually necessary to connect a diesel generator or other equipment outside the electricity meter to supply electricity. Therefore, an external control rate detection circuit is required to detect whether an external power supply device is connected to realize the external control rate detection function.

[0018] Based on this, an exemplary embodiment of the present application provides an externally controlled rate detection circuit, which includes resistors RN2, RT1, RT2, RT3, RT4, RT5, diodes DT1, DT3, optocoupler DT2 and capacitor CT1. The detection circuit is arranged between an external power generation device and a rate electric energy meter. When an external power generation device is connected, the externally controlled rate signal IO_Rate_Test becomes a square wave signal of a fixed frequency. In this way, the rate electric energy meter can judge whether an external power generation device is connected through the waveform of the input externally controlled rate signal IO_Rate_Test, thereby realizing the externally controlled rate detection function.

[0019] An exemplary embodiment of the present application provides an external control rate detection circuit, such as Figure 1As shown, the external control rate detection circuit includes a resistor RN2, a resistor RT1, a resistor RT2, a resistor RT3, a resistor RT4, a resistor RT5, a diode DT1, a diode DT3, an optical coupler DT2 and a capacitor CT1; the two ends of the resistor RN2 are electrically connected to the first output end and the second output end of the external power generation device respectively; the positive electrode of the diode DT1 is electrically connected to the first output end of the external power generation device, and the negative electrode is electrically connected to one end of the resistor RT1; the other end of the resistor RT1 is electrically connected to one end of the resistor RT2; the other end of the resistor RT2 is electrically connected to one end of the resistor RT3; the other end of the resistor RT3 is electrically connected to one end of the resistor RT4 The other end of the resistor RT4 is electrically connected to the cathode of the diode DT3 and the positive source of the optocoupler DT2; the negative source of the optocoupler DT2 is electrically connected to the anode of the diode DT3 and the second output end of the external power generation device; the secondary collector of the optocoupler DT2 is electrically connected to the external control rate signal IO_Rate_Test of the electric energy meter, and the secondary emitter is grounded; one end of the resistor RT5 is electrically connected to the system power DVDD of the electric energy meter, and the other end is electrically connected to the external control rate signal IO_Rate_Test of the electric energy meter; one end of the capacitor CT1 is electrically connected to the external control rate signal IO_Rate_Test, and the other end is grounded. The detection circuit is arranged between the external power generation device and the rate electric energy meter. When the external power generation device is connected, the external control rate signal IO_Rate_Test becomes a square wave signal of a fixed frequency. In this way, the rate electric energy meter can judge whether the external power generation device is connected through the waveform of the input external control rate signal IO_Rate_Test, thereby realizing the external control rate detection function.

[0020] A diesel generator is a type of power generation equipment that uses diesel as fuel and generates electricity by driving a generator with a diesel engine. Diesel generators have the characteristics of quick start-up, easy operation and maintenance, low investment, and strong environmental adaptability, so they are widely used in various emergency power generation situations. The external power generation equipment of this application can be a diesel generator or other power generation equipment.

[0021] In one embodiment, the resistor RN2 is a varistor, and the varistor voltage is 820V.

[0022] Resistors RT1, RT2, RT3 and RT4 are chip resistors with a withstand voltage of 200V.

[0023] Resistor RT5 is a chip resistor with a withstand voltage of 50V.

[0024] Capacitor CT1 is a chip capacitor with a withstand voltage of 50V.

[0025] The response time of the optocoupler DT2 is 4us.

[0026] The non-repetitive peak reverse voltage of diode DT1 and diode DT3 is 100V.

[0027] The working principle of the external control rate detection circuit of the present application is as follows: when one end of the circuit is not connected to the external power generation equipment, the external control rate signal IO_Rate_Test detected by the rate electricity meter is a high level; when one end of the circuit is connected to the external power generation equipment, since the external power generation equipment inputs an AC signal into the detection circuit, at this time, the external control rate signal IO_Rate_Test becomes a square wave signal with a fixed frequency. In this way, the rate electricity meter can determine whether there is an external power generation equipment connected by detecting the waveform of the external control rate signal, thereby realizing the detection function of the external control rate.

[0028] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0029] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the intention of the present application also includes these modifications and variations.

Claims

1. An external control rate detection circuit, characterized in that: It includes a resistor RN2, a resistor RT1, a resistor RT2, a resistor RT3, a resistor RT4, a resistor RT5, a diode DT1, a diode DT3, an optocoupler DT2 and a capacitor CT1; the two ends of the resistor RN2 are electrically connected to the first output end and the second output end of the external power generation device respectively; the positive electrode of the diode DT1 is electrically connected to the first output end of the external power generation device, and the negative electrode is electrically connected to one end of the resistor RT1; the other end of the resistor RT1 is electrically connected to one end of the resistor RT2; the other end of the resistor RT2 is electrically connected to one end of the resistor RT3; the other end of the resistor RT3 is electrically connected to one end of the resistor RT4; The other end of the resistor RT4 is electrically connected to the cathode of the diode DT3 and the positive source electrode of the optocoupler DT2; the negative source electrode of the optocoupler DT2 is electrically connected to the anode of the diode DT3 and the second output end of the external power generation equipment; the secondary collector of the optocoupler DT2 is electrically connected to the external control rate signal IO_Rate_Test of the electric energy meter, and the secondary emitter is grounded; one end of the resistor RT5 is electrically connected to the power supply DVDD of the electric energy meter, and the other end is electrically connected to the external control rate signal IO_Rate_Test of the electric energy meter; one end of the capacitor CT1 is electrically connected to the external control rate signal IO_Rate_Test, and the other end is grounded.

2. The external control rate detection circuit according to claim 1, characterized in that: The resistor RN2 is a varistor, and the varistor voltage is 820V.

3. The external control rate detection circuit according to claim 1, characterized in that: The resistors RT1, RT2, RT3 and RT4 are chip resistors with a withstand voltage of 200V.

4. The external control rate detection circuit according to claim 1, characterized in that: The resistor RT5 is a chip resistor with a withstand voltage of 50V.

5. The external control rate detection circuit according to claim 1, characterized in that: The capacitor CT1 is a chip capacitor with a withstand voltage of 50V.

6. The external control rate detection circuit according to claim 1, characterized in that: The response time of the optical coupler DT2 is 4us.

7. The external control rate detection circuit according to claim 1, characterized in that: The non-repetitive peak reverse voltage of the diode DT1 and the diode DT3 is 100V.

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