A battery-type zero-line-dropped electric meter and its low-power consumption measurement method

Abstract

The present invention belongs to the technical field of zero-line electricity meters, and in particular relates to a battery-type zero-line electricity meter, comprising: an electricity meter structure and a battery structure, wherein the electricity meter structure comprises an electricity meter body and a mounting plate fixedly connected to the outer wall of the electricity meter body, a battery slot is provided at the lower end of the electricity meter body, and relative positive and negative electrodes are provided on the inner wall of the battery slot; the battery structure comprises a U-shaped part slidably connected to the battery slot, a spare battery is placed in the U-shaped part, a first horizontal support block and a second support block are fixedly connected to the upper end of the U-shaped part, and a strip-shaped limiting groove that is closely connected to the first support block is provided on the inner wall of the battery slot. The present invention adopts a backup battery type to provide power, effectively reducing the cost of use, and by providing a fixing unit and a limiting unit, the backup battery can be quickly replaced and used, thereby improving the convenience of use, and is also suitable for situations where there is no AC power.

Description

Technical Field

[0001] The present invention relates to the technical field of dropped neutral line electricity meter assemblies, and in particular to a battery-type dropped neutral line electricity meter and a low-power consumption metering method thereof. Background Art

[0002] Existing zero-line drop meters mostly use PT type. PT is a power transformer. As long as there is current flowing, the power transformer can sense the current and provide power for the meter to measure the zero line drop. However, PT is relatively expensive.

[0003] Furthermore, current methods for measuring energy when the neutral line is dropped rely on integrating the current or power RMS value detected by the metering chip. This process takes an average of more than 500ms, resulting in significant energy waste. To address this issue, we propose a battery-powered neutral line drop meter and its low-power measurement method. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a battery-type zero-line drop-out electric meter and a low-power consumption metering method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A battery-type zero-line meter comprises: a meter structure and a battery structure, the meter structure comprising a meter body and a mounting plate fixedly connected to the outer wall of the meter body, the lower end of the meter body being provided with a battery slot, the inner wall of the battery slot being provided with relative positive and negative electrodes; the battery structure comprising a U-shaped piece slidably connected to the battery slot, a spare battery being placed in the U-shaped piece, the upper end of the U-shaped piece being fixedly connected to a first horizontal support block and a second support block, the inner wall of the battery slot being provided with a strip-shaped limiting groove which is fittedly connected to the first support block, the upper ends of the first support block and the second support block being provided with a fixing unit for fixing the spare battery, a vertical rectangular plate being fixedly connected to the side wall of the second support block, a rectangular groove corresponding to the rectangular plate being provided on the side wall of the meter body, and a limiting unit in contact with the rectangular plate being provided on the outer wall of the meter body.

[0007] In the above-mentioned battery-type zero-line electricity meter, the fixed unit includes an arc-shaped cover slidably connected to the upper ends of the first support block and the second support block, the arc-shaped cover is correspondingly sleeved on the outer side of the backup battery, and the side wall of the arc-shaped cover is fixedly connected to a mounting block, and the upper end of the mounting block is threadedly connected to a fastening bolt fixed to the second support block.

[0008] In the above-mentioned battery-type zero-line meter, insulating rubber pads are fixedly connected to the inner walls of the U-shaped part and the arc cover that are in contact with the backup battery, and the two ends of the backup battery are respectively in contact with the positive and negative electrodes on the inner wall of the battery slot.

[0009] In the above-mentioned battery-type zero-line meter, the limiting unit includes two rectangular frames fixedly connected to the side walls of the meter body, and the two rectangular frames are symmetrically arranged on both sides of the rectangular opening. A vertical pull rod is slidably connected to the rectangular frame, and a limiting plate is fixedly connected to the side wall of the pull rod, and the end of the limiting plate away from the pull rod passes through the rectangular frame and abuts against the side wall of the rectangular plate. The end of the pull rod away from the limit plate is fixedly connected to a compression spring, and the end of the compression spring away from the pull rod is fixedly connected to the inner wall of the rectangular frame.

[0010] In the above-mentioned battery-type zero-line-dropped electricity meter, the lower end of the pull rod extends to the lower side of the rectangular frame, and a protective pad is fixedly connected to the side wall where the limiting plate contacts the rectangular plate.

[0011] In the above-mentioned battery-type zero-line drop-out meter, an integrated chip is provided in the meter body, a microcontroller module and a metering module are provided in the integrated chip, the output ends of the integrated chip are respectively connected to an infrared communication module, a display module and a data storage module, an AC power supply connected to the integrated chip is provided in the meter body, the AC power supply includes a varistor, a safety capacitor, a discharge resistor, a diode, a plug-in power resistor, an electrolytic capacitor, a filter capacitor, a rectifier diode and a low-voltage difference linear regulator, the backup battery is also electrically connected to the integrated chip, and the meter body is also provided with a voltage sampling module, a current sampling module and a power-off detection module connected to the integrated chip.

[0012] A low-power consumption measurement method for a battery-type zero-line-dropped electric meter comprises the following steps:

[0013] S1. Set the standard for the zero-line meter. First, set the current reference to 10A. Continuously read the AD values ​​of 8 current cycle waveforms. 8 peak-to-peak values ​​are obtained by sorting. The average of the 8 peak-to-peak values ​​is the 10A AD value. The record is saved in the data storage chip.

[0014] S2: When the meter detects that there is no AC voltage, that is, one end of the neutral wire and the live wire is not connected and current still exists, the meter is in the neutral wire drop state and enters the low power consumption metering mode;

[0015] S3. The electric meter reads the AD value of a current cycle waveform, obtains a peak-to-peak value by sorting, converts the current value according to the stored AD value of the current peak at 10A, calculates the power integral constant value of the integrated chip according to the current value, and sends it to the power constant measurement register of the integrated chip. The integrated chip starts to measure electric energy and enters sleep mode at the same time, waiting to be awakened by the next cycle.

[0016] In the above-mentioned low-power consumption metering method for a battery-type neutral-line-dropped electricity meter, the operation time of step S3 is 40 ms.

[0017] Compared with the existing technology, the advantages of this battery-type zero-line drop-out meter and its low-power consumption measurement method are:

[0018] 1. The present invention adopts a backup battery to provide power, effectively reducing the cost of use. The backup battery can be quickly replaced by setting a fixing unit and a limiting unit, thereby improving the convenience of use. It is also applicable to situations where there is no AC power.

[0019] 2. The present invention measures electric energy by detecting the peak-to-peak value of the current waveform, and it only takes 40ms to measure a current waveform, which greatly reduces the power consumption during operation and increases the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the external structure of a battery-type zero-line-dropped electric meter and its low-power consumption measurement method proposed by the present invention;

[0021] Figure 2 This is a bottom-up structural diagram of a battery-type zero-line dropout electric meter and a low-power consumption metering method thereof proposed by the present invention;

[0022] Figure 3 This is a diagram showing the internal structure of the battery compartment of the battery-powered ammeter body of the battery-powered zero-line ammeter and its low-power consumption measurement method proposed by the present invention;

[0023] Figure 4 This is a diagram of the backup battery structure of a battery-type zero-line dropout electric meter and its low-power consumption measurement method proposed by the present invention;

[0024] Figure 5 This is a structural diagram of a battery-type zero-line dropout electric meter and its low-power consumption measurement method proposed by the present invention when the arc cover is detached;

[0025] Figure 6 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 7 This is a structural block diagram of a battery-type zero-line dropout meter and its low-power consumption measurement method proposed by the present invention;

[0027] Figure 8 This is an AC voltage power supply circuit diagram of a battery-type zero-line dropout electric meter and its low-power consumption measurement method proposed by the present invention;

[0028] Figure 9 This is a backup battery power supply circuit diagram of a battery-type zero-line dropout electric meter and its low-power consumption measurement method proposed by the present invention;

[0029] Figure 10 This is a display circuit diagram of a battery-type zero-line-dropped electric meter and its low-power consumption measurement method proposed by the present invention;

[0030] Figure 11 A display circuit diagram of a battery-type zero-line dropout electric meter and a low-power consumption measurement method thereof proposed by the present invention;

[0031] Figure 12 This is a power-off detection circuit diagram of a battery-type zero-line loss meter and a low-power consumption measurement method thereof proposed by the present invention;

[0032] Figure 13 A storage module circuit diagram of a battery-type zero-line dropout electric meter and a low-power consumption measurement method thereof proposed by the present invention;

[0033] Figure 14 This is a circuit diagram of an infrared communication module of a battery-type zero-line dropout electric meter and a low-power consumption measurement method thereof proposed by the present invention;

[0034] Figure 15 This is a voltage sampling circuit diagram of a battery-type zero-line dropout electric meter and its low-power consumption measurement method proposed by the present invention;

[0035] Figure 16 This is a current sampling circuit diagram of a battery-type zero-line dropout electric meter and a low-power consumption measurement method thereof proposed by the present invention;

[0036] Figure 17 This is a flow chart of a battery-type zero-line-dropped electricity meter and a low-power consumption measurement method thereof proposed by the present invention.

[0037] In the figure, 100 is the meter structure, 101 is the meter body, 102 is the mounting plate, 200 is the battery structure, 201 is the U-shaped part, 202 is the spare battery, 203 is the first support block, 204 is the second support block, 205 is the rectangular plate, 206 is the arc cover, 207 is the mounting block, 208 is the rectangular frame, 209 is the pull rod, 210 is the limit plate, and 211 is the compression spring. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Example

[0040] Reference Figure 1-7 A battery-type zero-line meter includes: a meter structure 100 and a battery structure 200. The meter structure 100 includes a meter body 101 and a mounting plate 102 fixedly connected to the outer wall of the meter body 101. A battery slot is provided at the lower end of the meter body 102, and relative positive and negative electrodes are provided on the inner wall of the battery slot.

[0041] The battery structure 200 includes a U-shaped member 201 slidably connected to the battery slot, a spare battery 202 is placed in the U-shaped member 201, the upper end of the U-shaped member 201 is fixedly connected to a horizontal first support block 203 and a second support block 204, and a strip-shaped limiting groove that is closely connected to the first support block 203 is provided on the inner wall of the battery slot. The upper ends of the first support block 203 and the second support block 204 are provided with a fixing unit for fixing the spare battery, and the fixing unit includes an arc-shaped cover 206 slidably connected to the upper ends of the first support block 203 and the second support block 204. The arc-shaped cover 206 is correspondingly sleeved on the outer side of the spare battery 202, and the side wall of the arc-shaped cover 206 is provided. A mounting block 207 is fixedly connected, and the upper end of the mounting block 207 is threadedly connected to a fastening bolt fixed to the second support block 204. Specifically, the U-shaped part 201 and the arc cover 206 are fixedly connected to the inner wall in contact with the spare battery 202 with insulating rubber pads, and the two ends of the spare battery 202 are respectively in contact with the positive and negative electrodes on the inner wall of the battery slot. The use of the fixing unit can ensure the stability of the spare battery 202 for connection to the arc cover 105, thereby ensuring the stable connection of the spare battery 202 to the positive and negative electrodes in the battery slot. When the spare battery needs to be replaced, the fastening bolts are adjusted to facilitate the connection of the second support block 204.

[0042] Furthermore, a vertical rectangular plate 205 is fixedly connected to the side wall of the second support block 204, a rectangular groove corresponding to the rectangular plate 205 is opened on the side wall of the meter body 101, and a limit unit in contact with the rectangular plate 205 is provided on the outer wall of the meter body 101. The limit unit includes two rectangular frames 208 fixedly connected to the side wall of the meter body 101, and the two rectangular frames 208 are symmetrically arranged on both sides of the rectangular opening. A vertical pull rod 209 is slidably connected in the rectangular frame 208, and a limit plate 210 is fixedly connected to the side wall of the pull rod 209, and the end of the limit plate 210 away from the pull rod 209 passes through the rectangular frame 208 and abuts against the side wall of the rectangular plate 205. The end of the pull rod 209 away from the limit plate 210 is fixedly connected to a compression spring 211, and the end of the compression spring 211 away from the pull rod 209 is fixedly connected to the inner wall of the rectangular frame 208. Specifically, the lower end of the pull rod 209 extends to the lower side of the rectangular frame 208, and a protective pad is fixedly connected to the side wall where the limit plate 210 contacts the rectangular plate 205. When the limit unit is used, it can limit the spare battery 202, further ensuring the stable connection between the spare battery 202 and the positive and negative electrodes in the battery slot. When it needs to be taken out, the position of the pull rod 209 is adjusted to make the limit plate 210 out of contact with the rectangular plate 205. The operation is simple and easy to take and replace.

[0043] The meter body 101 is provided with an integrated chip, the integrated chip is provided with a micro control module and a metering module, and the output end of the integrated chip is connected to an infrared communication module, a display module and a data storage module respectively. Figure 10 、 11 , 13, 14, an infrared communication module is provided with an infrared transmitting circuit and an infrared receiving circuit, and the infrared transmitting circuit is composed of resistors R15, R18, R19, R20, transistor Q2 and infrared transmitting tube D13; the infrared receiving circuit is composed of resistors R14, R13, infrared receiving tube D12 and filter capacitor C11; a backlight circuit and a display circuit are provided in the display module, and the backlight circuit includes resistors R3, R8, transistor Q1 and backlight panel BL1; the display circuit is composed of an LCD display screen; a storage unit circuit is provided in the data storage module, and the storage unit circuit is composed of a storage chip U4, resistors R16, R17, filter capacitor C12, and is used to store electrical energy and calibration data.

[0044] Specifically, the meter body 101 is provided with an AC power supply connected to the integrated chip. Figure 8 RV1 is a varistor, C1 is a safety capacitor, R4 and R5 are discharge resistors, D3 and D9 are diodes that act as rectifying resistors, R13 is a 3W plug-in power resistor, C3 and C4 are electrolytic capacitors, C5 and C6 are filter capacitors, DA1 is a rectifier diode, and U1 is a low-voltage dropout linear regulator. The above together constitute an AC power supply to power the integrated chip.

[0045] Reference Figure 9 The backup battery 202 is also electrically connected to the integrated chip. The power supply circuit is composed of a battery BT1, a Schottky diode D4, and a filter capacitor C2. When the neutral line is disconnected or there is a power outage, the backup battery is used to power the integrated chip.

[0046] Reference Figure 12 、 15 , 16, the meter body 101 is also provided with a voltage sampling module, a current sampling module and a power-off detection module connected to the integrated chip. The voltage sampling module is provided with a voltage sampling circuit, and the voltage sampling circuit is composed of capacitors R24, R25, R26, R27, R28, R29, and filter capacitors C19 and C20, which are used for the voltage sampling function of the integrated chip; the current sampling module includes a first-channel current sampling circuit and a second-channel current sampling circuit. The first-channel current sampling circuit is composed of R32, R35, R36, R37, filter capacitors C21 and C22, and an external manganese copper; the second-channel current sampling circuit is composed of R38, R42, R45, R46, filter capacitors C24 and R29, and an external current transformer. The current sampling circuits of the two channels are both connected to the integrated chip for current sampling.

[0047] A low-power consumption measurement method for a battery-type zero-line-dropped electric meter comprises the following steps:

[0048] S1. Set the standard for the zero-line meter. First, set the current reference to 10A. Continuously read the AD values ​​of 8 current cycle waveforms. 8 peak-to-peak values ​​are obtained by sorting. The average of the 8 peak-to-peak values ​​is the 10A AD value. The record is saved in the data storage chip.

[0049] S2: When the meter detects that there is no AC voltage, that is, one end of the neutral wire and the live wire is not connected and current still exists, the meter is in the neutral wire drop state and enters the low power consumption metering mode;

[0050] S3. The meter reads the AD value of a current cycle waveform and obtains a peak-to-peak value by sorting. The current value is converted based on the stored AD value of the current peak at 10A. The power integral constant value of the integrated chip is converted based on the current value and sent to the power constant measurement register of the integrated chip. The integrated chip starts to measure electric energy and enters sleep mode at the same time, waiting to be awakened by the next cycle. The operation time of this process is 40ms.

[0051] This is achieved by detecting the peak-to-peak value of the current waveform. It only takes 40ms to measure a current waveform, which greatly reduces the power consumption during operation and increases the battery life.

[0052] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A low-power consumption measurement method for a battery-type zero-line-dropped electric meter, characterized in that: A battery-type zero-line electric meter comprises an electric meter structure (100), which comprises an electric meter body (101) and a mounting plate (102) fixedly connected to the outer wall of the electric meter body (101); a battery slot is provided at the lower end of the electric meter body (101); and opposite positive and negative electrodes are provided on the inner wall of the battery slot; A battery structure (200) comprising a U-shaped member (201) slidably connected to a battery slot, a backup battery (202) being placed in the U-shaped member (201), a first horizontal support block (203) and a second support block (204) being fixedly connected to the upper end of the U-shaped member (201), a strip-shaped limiting groove being closely connected to the first support block (203) being provided on the inner wall of the battery slot, a fixing unit for fixing the backup battery being provided at the upper ends of the first support block (203) and the second support block (204), a vertical rectangular plate (205) being fixedly connected to the side wall of the second support block (204), a rectangular groove corresponding to the rectangular plate (205) being provided on the side wall of the electric meter body (101), and a limiting unit contacting the rectangular plate (205) being provided on the outer side wall of the electric meter body (101); The electric meter body (101) is provided with an integrated chip, the integrated chip is provided with a microcontroller module and a metering module, the output end of the integrated chip is respectively connected to an infrared communication module, a display module and a data storage module, the electric meter body (101) is provided with an AC power supply connected to the integrated chip, the AC power supply includes a varistor, a safety capacitor, a discharge resistor, a diode, a plug-in power resistor, an electrolytic capacitor, a filter capacitor, a rectifier diode and a low-voltage difference linear regulator, the backup battery (202) is also electrically connected to the integrated chip, and the electric meter body (101) is further provided with a voltage sampling module, a current sampling module and a power-off detection module connected to the integrated chip; The measurement method includes the following steps: S1. Set the standard for the zero-line meter. First, set the current reference to 10A. Continuously read the AD values ​​of 8 current cycle waveforms. 8 peak-to-peak values ​​are obtained by sorting. The average of the 8 peak-to-peak values ​​is the 10A AD value. The record is saved in the data storage chip. S2: When the meter detects that there is no AC voltage, that is, one end of the neutral wire and the live wire is not connected and current still exists, the meter is in the neutral wire drop state and enters the low power consumption metering mode; S3. The meter reads the AD value of a current cycle waveform, obtains a peak-to-peak value by sorting, converts the current value according to the stored AD value of the current peak at 10A, converts the power integral constant value of the integrated chip according to the current value, and sends it to the power constant measurement register of the integrated chip. The integrated chip starts to measure electricity and enters sleep mode at the same time, waiting to be awakened by the next cycle. A battery-type zero-line meter.

2. A low-power consumption measurement method for a battery-type zero-line-dropped electric meter according to claim 1, characterized in that: The fixing unit comprises an arc-shaped cover (206) slidably connected to the upper ends of the first support block (203) and the second support block (204); the arc-shaped cover (206) is correspondingly sleeved on the outer side of the backup battery (202); a mounting block (207) is fixedly connected to the side wall of the arc-shaped cover (206); and a fastening bolt fixed to the second support block (204) is threadedly connected to the upper end of the mounting block (207).

3. A low-power consumption measurement method for a battery-type zero-line-dropped electric meter according to claim 2, characterized in that: Insulating rubber pads are fixedly connected to the inner walls of the U-shaped member (201) and the arc-shaped cover (206) that are in contact with the backup battery (202), and both ends of the backup battery (202) are respectively in contact with the positive and negative electrodes on the inner wall of the battery slot.

4. A low-power consumption measurement method for a battery-type zero-line-dropped electric meter according to claim 1, characterized in that: The limiting unit includes two rectangular frames (208) fixedly connected to the side walls of the electric meter body (101), and the two rectangular frames (208) are symmetrically arranged on both sides of the rectangular opening. A vertical pull rod (209) is slidably connected in the rectangular frame (208), and a limiting plate (210) is fixedly connected to the side wall of the pull rod (209), and the end of the limiting plate (210) away from the pull rod (209) passes through the rectangular frame (208) and abuts against the side wall of the rectangular plate (205). The end of the pull rod (209) away from the limiting plate (210) is fixedly connected to a compression spring (211), and the end of the compression spring (211) away from the pull rod (209) is fixedly connected to the inner wall of the rectangular frame (208).

5. A low-power consumption measurement method for a battery-type zero-line-dropped electric meter according to claim 4, characterized in that: The lower end of the pull rod (209) extends to the lower side of the rectangular frame (208), and a protective pad is fixedly connected to the side wall where the limiting plate (210) contacts the rectangular plate (205).

6. A low-power consumption measurement method for a battery-type zero-line-dropped electric meter according to claim 1, characterized in that: The operation time of step S3 is 40 ms.

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