Meter reading concentrator power supply circuit and meter reading concentrator

Abstract

The utility model discloses a meter reading concentrator power supply circuit and a meter reading concentrator, and relates to the technical field of meter reading concentrators. The input end of the rectifying circuit is electrically connected with the output end of the first voltage transformation circuit; the input end of the filtering voltage stabilizing circuit is electrically connected with the output end of the rectifying circuit; and the input end of the lighting circuit is electrically connected with the output end of the filtering voltage stabilizing circuit. By designing the meter reading concentrator power supply circuit with the lighting circuit, the meter reading concentrator has a lighting function and can be mounted at the position of original lighting equipment to replace the original lighting equipment, so that the meter reading concentrator is conveniently connected with the mains supply.

Description

Technical Field

[0001] The utility model relates to the technical field of meter reading concentrators, in particular to a meter reading concentrator power supply circuit and a meter reading concentrator. Background Art

[0002] Meter concentrators are generally used to collect and centralize data from multiple users' electricity or water meters to more efficiently manage their services and provide more accurate fee calculations. Meter concentrators can automatically collect data and transmit it to a central server or database for further analysis and processing.

[0003] Current meter reading concentrators are usually powered by batteries. For example, Chinese patent CN202221113186.8 discloses a meter reading concentrator, which includes a housing and a circuit board arranged in the housing, a power supply module including a supercapacitor and a battery, and an external connection device.

[0004] However, the battery life of the current meter reading concentrator is limited and needs to be replaced regularly. If the meter reading concentrator is in an unattended environment, the battery will be exhausted and the meter reading concentrator will not work properly.

[0005] Therefore, it is urgent to develop a meter reading concentrator power supply circuit and a meter reading concentrator to solve the problems in the prior art. Utility Model Content

[0006] The purpose of the utility model is to provide a power supply circuit for a meter reading concentrator and a meter reading concentrator. By designing a power supply circuit for a meter reading concentrator with a lighting circuit, the meter reading concentrator has a lighting function and can be installed at the location of an original lighting device to replace the original lighting device and obtain power from the power supply of the original lighting device, thereby solving the problem that the meter reading concentrator needs to replace batteries regularly as mentioned in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A power supply circuit for a meter reading concentrator, comprising:

[0009] a first voltage transformation circuit;

[0010] a rectifier circuit, wherein an input end of the rectifier circuit is electrically connected to an output end of the first transformer circuit;

[0011] A filtering and voltage stabilizing circuit, wherein an input end of the filtering and voltage stabilizing circuit is electrically connected to an output end of the rectifier circuit;

[0012] A lighting circuit, wherein the input end of the lighting circuit is electrically connected to the output end of the filtering and voltage stabilizing circuit.

[0013] Furthermore, the first voltage conversion circuit includes a transformer, the transformer includes a primary side and a secondary side, and the secondary side of the transformer is connected to the rectifier circuit.

[0014] Furthermore, the rectifier circuit includes a rectifier bridge, an input end of the rectifier bridge is connected to the secondary side of the transformer, and an output end of the rectifier bridge is connected to the filtering and voltage stabilizing circuit.

[0015] Furthermore, the filtering and voltage stabilizing circuit includes a first linear voltage regulator, an input end of the first linear voltage regulator is connected to an output end of the rectifier circuit, and an output end of the first linear voltage regulator is connected to an input end of the lighting circuit.

[0016] Furthermore, the input end of the first linear regulator is also connected to a first input filter unit, a second input filter unit or a third filter input unit, and the input end of the first linear regulator is grounded through the first input filter unit, the second input filter unit or the third filter input unit.

[0017] Further, the first input filter unit includes a first capacitor, a positive electrode of the first capacitor is connected to the input end of the first linear regulator, and a negative electrode of the first capacitor is grounded;

[0018] The second input filter unit includes a first resistor and a second capacitor, the first end of the first linear regulator is connected to one end of the first resistor, the other end of the first resistor is connected to the positive electrode of the second capacitor, and the negative electrode of the second capacitor is grounded;

[0019] The third filter input unit comprises a third capacitor, one end of the third capacitor is connected to the first end of the first linear regulator, and the other end of the third capacitor is grounded;

[0020] The output end of the first linear regulator is connected to a fourth capacitor, one end of the fourth capacitor is connected to the third end of the first linear regulator, and the other end of the fourth capacitor is grounded;

[0021] The third end of the first linear regulator is further connected to a diode. The third end of the first linear regulator is connected to the anode of the diode, and the cathode of the diode is grounded through a capacitor.

[0022] Furthermore, the lighting circuit includes a light emitting unit, an input end of the light emitting unit is connected to the cathode of the diode, and an output end of the light emitting unit is grounded.

[0023] Furthermore, it also includes a second voltage conversion circuit, wherein the input end of the second voltage conversion circuit is electrically connected to the output end of the filtering and stabilizing circuit.

[0024] Furthermore, the second voltage conversion circuit includes a second linear regulator, the input end of the second linear regulator is connected to the output end of the rectifier circuit; the input end of the second linear regulator is grounded through a sixth capacitor, and the output end is grounded through a seventh capacitor.

[0025] A meter reading concentrator comprises a lamp holder and a meter reading concentrator body electrically connected to the lamp holder, wherein the lamp holder is provided with a power supply circuit of the meter reading concentrator.

[0026] Compared with the prior art, the beneficial effects of the utility model are as follows: by designing the power supply circuit of the meter reading concentrator, the meter reading concentrator can be connected to 220V AC power without the need to replace batteries regularly; at the same time, the power supply circuit of the meter reading concentrator is provided with a lighting circuit, so that the meter reading concentrator of the present application has a lighting function, can be installed at the location of the original lighting equipment to replace the original lighting equipment, and obtain power from the power supply of the original lighting equipment, without the need to find an additional power supply, and is easy to install.

[0027] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the overall circuit diagram of the utility model;

[0029] Figure 2 is a circuit schematic diagram of a first voltage transformation circuit and a rectification circuit;

[0030] Figure 3 It is the circuit schematic diagram of the filter and voltage stabilization circuit;

[0031] Figure 4 It is a circuit schematic diagram of the lighting circuit and the second transformer circuit.

[0032] Explanation of the markings in the figure: 1. First voltage conversion circuit; 2. Rectification circuit; 3. Filtering and voltage stabilization circuit; 4. Lighting circuit; 5. Second voltage conversion circuit. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Meter reading concentrator power supply circuit, such as Figure 1 and Figure 4 As shown, including:

[0036] A first voltage conversion circuit 1, wherein an input end of the first voltage conversion circuit 1 is used to connect to the mains;

[0037] A rectifier circuit 2, wherein an input end of the rectifier circuit 2 is electrically connected to an output end of the first transformer circuit 1;

[0038] A filtering and voltage-stabilizing circuit 3, wherein an input end of the filtering and voltage-stabilizing circuit 3 is electrically connected to an output end of the rectifying circuit 2, and an input end of the lighting circuit 4 is electrically connected to an output end of the filtering and voltage-stabilizing circuit 3;

[0039] The lighting circuit 4 can be used for lighting or powering lighting equipment. The input end of the lighting circuit 4 is electrically connected to the output end of the filtering and stabilizing circuit 3.

[0040] When the voltage required by the main control chip of the meter reading concentrator is the same as the voltage required by the lighting unit in the lighting circuit 4, the output end of the filtering and voltage stabilizing circuit 3 can be directly connected to the power pin of the main control chip.

[0041] When the voltage required by the main control chip of the meter reading concentrator is different from the voltage required by the lighting unit in the lighting circuit 4, a second voltage conversion circuit 5 is further provided, the input end of the second voltage conversion circuit 5 is electrically connected to the output end of the filtering and voltage stabilizing circuit 3, and the output end of the second voltage conversion circuit 5 is connected to the power pin of the main control chip of the meter reading concentrator to supply power to the main control chip.

[0042] The first voltage conversion circuit 1 is used for stepping down the voltage; it includes a transformer T1, the transformer T1 includes a primary side and a secondary side, the primary side of the transformer T1 is connected to the 220VAC mains, wherein the first end of the transformer T1 is connected to the live wire through a fuse resistor FR1, and the second end is connected to the neutral wire. The secondary side of the transformer is connected to the rectifier circuit 2. In this embodiment, the first voltage conversion circuit 1 is used to convert 220V AC power into 5V AC power.

[0043] The rectifier circuit 2 is used to convert AC power into DC power, and includes a rectifier bridge, the input end of the rectifier bridge is connected to the secondary side of the transformer T1, and the output end of the rectifier bridge is connected to the filter voltage stabilization circuit 3. Figure 2 As shown, the first end of the rectifier bridge is connected to the third end of the transformer T1, and the second end of the rectifier bridge is connected to the fourth end of the transformer T1; the third end of the rectifier bridge is grounded, and the fourth end of the rectifier bridge is used to connect to the input end of the first linear regulator U1.

[0044] The filtering and stabilizing circuit 3 is used to output a stable voltage after stabilizing and filtering the direct current, and includes a first linear voltage stabilizer U1. In this embodiment, the first end of the first linear voltage stabilizer U1 is an input end, which is connected to the output end of the rectifier circuit 2. The first end of the first linear voltage stabilizer U1 is also connected to a first input filtering unit, a second input filtering unit and a third filtering input unit. The first end of the first linear voltage stabilizer U1 is grounded through the first input filtering unit, the second input filtering unit and the third filtering input unit.

[0045] The first input filter unit includes a first capacitor C1 , wherein a positive electrode of the first capacitor C1 is connected to a first end of the first linear regulator U1 , and a negative electrode of the first capacitor C1 is grounded.

[0046] The second input filter unit includes a first resistor R1 and a second capacitor C2. One end of the first resistor R1 is connected to the first end of the first linear regulator U1, and the other end is connected to the positive electrode of the second capacitor C2. The negative electrode of the second capacitor C2 is grounded.

[0047] The third filter input unit includes a third capacitor C3, one end of the third capacitor C3 is connected to the first end of the first linear regulator U1, and the other end of the third capacitor C3 is grounded.

[0048] A second terminal of the first linear regulator U1 is grounded.

[0049] The output end of the first linear regulator U1 is the third end. The third end of the first linear regulator U1 is connected to a fourth capacitor C4. One end of the fourth capacitor C4 is connected to the third end of the first linear regulator U1, and the other end is grounded.

[0050] The third end of the first linear regulator U1 is also connected to a diode D7, the third end of the first linear regulator U1 is connected to the anode of the diode D7, and the cathode of the diode D7 is grounded through the fifth capacitor C5 and the resistor R2 to achieve the output of the 5V voltage of the filtering and stabilizing circuit 3.

[0051] The lighting circuit 4 includes a light emitting unit, the input end of the light emitting unit is connected to the cathode of the diode D7, and the output end of the light emitting unit is grounded. In this embodiment, the light emitting unit includes a light emitting diode LED1 and a resistor R3, the anode of the light emitting diode LED1 is connected to the cathode of the diode D7, the cathode is connected to one end of the resistor R3, and the other end of the resistor R3 is grounded.

[0052] The second voltage conversion circuit 5 includes a second linear voltage regulator U2, a first end of which is grounded; a second end of which is an input end, connected to the cathode of the diode D7; a third end of which is an output end, connected to the power pin of the main control chip. The input end of the second linear voltage regulator U2 is grounded through a sixth capacitor C6, and the output end is grounded through a seventh capacitor C7, so as to achieve a voltage stabilization effect.

[0053] A meter reading concentrator comprises a lamp holder and a meter reading concentrator body electrically connected to the lamp holder, wherein the lamp holder is provided with a power circuit of the meter reading concentrator, and an input end of the power circuit of the meter reading concentrator is connected to the mains through the lamp holder.

[0054] The utility model provides a meter reading concentrator power supply circuit and a meter reading concentrator, which have simple structure, convenient use and high reliability.

[0055] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A power supply circuit for a meter reading concentrator, It is characterized in that include: a first voltage transformation circuit; a rectifier circuit, wherein an input end of the rectifier circuit is electrically connected to an output end of the first transformer circuit; A filtering and voltage stabilizing circuit, wherein an input end of the filtering and voltage stabilizing circuit is electrically connected to an output end of the rectifier circuit; A lighting circuit, wherein the input end of the lighting circuit is electrically connected to the output end of the filtering and voltage stabilizing circuit.

2. The meter reading concentrator power supply circuit according to claim 1, It is characterized in that The first voltage conversion circuit includes a transformer, the transformer includes a primary side and a secondary side, and the secondary side of the transformer is connected to the rectifier circuit.

3. The meter reading concentrator power supply circuit according to claim 2, It is characterized in that The rectifier circuit comprises a rectifier bridge, an input end of the rectifier bridge is connected to the secondary side of the transformer, and an output end of the rectifier bridge is connected to the filtering and voltage stabilizing circuit.

4. The meter reading concentrator power supply circuit according to claim 3, It is characterized in that The filtering and voltage stabilizing circuit comprises a first linear voltage regulator, the input end of the first linear voltage regulator is connected to the output end of the rectifier circuit, and the output end of the first linear voltage regulator is connected to the input end of the lighting circuit.

5. The meter reading concentrator power supply circuit according to claim 4, It is characterized in that The input end of the first linear regulator is also connected to the first input filter unit, the second input filter unit or the third filter input unit, and the input end of the first linear regulator is grounded through the first input filter unit, the second input filter unit or the third filter input unit.

6. The meter reading concentrator power supply circuit according to claim 5, It is characterized in that The first input filter unit comprises a first capacitor, a positive electrode of the first capacitor is connected to the input end of the first linear regulator, and a negative electrode of the first capacitor is grounded; The second input filter unit includes a first resistor and a second capacitor, the first end of the first linear regulator is connected to one end of the first resistor, the other end of the first resistor is connected to the positive electrode of the second capacitor, and the negative electrode of the second capacitor is grounded; The third filter input unit comprises a third capacitor, one end of the third capacitor is connected to the first end of the first linear regulator, and the other end of the third capacitor is grounded; The output end of the first linear regulator is connected to a fourth capacitor, one end of the fourth capacitor is connected to the third end of the first linear regulator, and the other end of the fourth capacitor is grounded; The third end of the first linear regulator is further connected to a diode. The third end of the first linear regulator is connected to the anode of the diode, and the cathode of the diode is grounded through a capacitor.

7. The meter reading concentrator power supply circuit according to claim 6, It is characterized in that The lighting circuit comprises a light emitting unit, an input end of the light emitting unit is connected to the cathode of the diode, and an output end of the light emitting unit is grounded.

8. The meter reading concentrator power supply circuit according to any one of claims 1 to 7, It is characterized in that It also includes a second voltage conversion circuit, wherein the input end of the second voltage conversion circuit is electrically connected to the output end of the filtering and stabilizing circuit.

9. The meter reading concentrator power supply circuit according to claim 8, It is characterized in that The second voltage conversion circuit includes a second linear regulator, the input end of the second linear regulator is connected to the output end of the rectifier circuit; the input end of the second linear regulator is grounded through a sixth capacitor, and the output end is grounded through a seventh capacitor.

10. A meter reading concentrator, It is characterized in that The utility model comprises a lamp holder and a meter reading concentrator body electrically connected to the lamp holder, wherein the power supply circuit of the meter reading concentrator according to any one of claims 1 to 9 is arranged in the lamp holder.

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