CN216117859U

CN216117859U - Internet of things type leakage indicator

Info

Publication number: CN216117859U
Application number: CN202122604893.9U
Authority: CN
Inventors: 代辉
Original assignee: Chengdu Handu Technology Co ltd
Current assignee: Chengdu Handu Technology Co ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-03-22
Anticipated expiration: 2031-10-27

Abstract

The utility model discloses an Internet of things type leakage indicator which comprises a current transformer, a metering unit, an MCU, a CPLD, an LORA module and a power supply module, wherein the current transformer is used for detecting the current of a low-voltage line; the MCU is also electrically connected with a display module and a key module. By adopting a processor mode of adding the CPLD to the MCU, the CPLD is independent of a hardware circuit, the product is stable, the hardware logic structure is unique, the installation mode of the current transformer is very convenient, the current transformer is clamped into a low-voltage circuit, and the body equipment is installed after being placed in a meter box or fixed outside the meter box by a binding belt; can wireless transmission detect data through the LORA module, realize long-range electric leakage condition of looking over.

Description

Internet of things type leakage indicator

Technical Field

The utility model belongs to the technical field of leakage indicators, and particularly relates to an Internet of things type leakage indicator.

Background

The existing leakage finding means is based on a pincerlike ammeter, and the leakage current of a fire zero line at the outlet side of a user electric energy meter is detected by the pincerlike ammeter through the experience of power distribution operation and maintenance personnel, so that whether the user leaks electricity or not is judged. The method has long implementation period and low efficiency, and sometimes users with electric leakage are difficult to find out or even can not find out by experience.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an Internet of things type leakage indicator, which solves the problem that the existing leakage finding means is inconvenient.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an Internet of things type leakage indicator which comprises a current transformer, a metering unit, an MCU, a CPLD, an LORA module and a power supply module, wherein the current transformer is used for detecting the current of a low-voltage line; the MCU is also electrically connected with a display module and a key module.

According to the technology, the CPLD is independent of a hardware circuit by adopting a processor mode of adding the MCU and the CPLD, the product is stable, the hardware logic structure is unique, the current transformer is very convenient and fast to install, the current transformer is clamped into a low-voltage line, and the body equipment is installed in the meter box or fixed outside the meter box by using a binding belt; the LORA module can wirelessly transmit detection data to realize remote checking of the leakage situation,

in one possible design, the power supply module includes a charging circuit and a battery, the charging circuit including a charger module; the charger module is electrically connected with the storage battery and an external power supply and charges the storage battery; the charger module is TP4056 charger module, and No. 6 pin and No. 7 pin of TP4056 charger module are electrically connected with MCU. TP4056 is a complete single-section lithium ion battery linear charger adopting constant current/constant voltage. The SOP8/MSOP8 package with its bottom heat sink and the small number of external components make TP4056 a desirable choice for portable applications. The TP4056 may be adapted to operate with USB power supplies and adapter power supplies.

In one possible design, the storage battery is electrically connected with a first buck converter unit, and the first buck converter unit is electrically connected with the CPLD, the MCU and the LORA module.

In one possible embodiment, the battery is electrically connected to a second buck converter unit, which is electrically connected to the MCU and the metering unit.

In one possible design, the MCU is an HC32L110C6PA chip.

In one possible design, the CPLD is an H1C02N3Q32 chip.

In one possible design, the metering unit includes an HLW8112 metering chip and an auxiliary circuit.

In one possible design, the MCU is also electrically connected to a positioning module. Through setting up the orientation module, can upload the positional information to the system through LORA in the lump, acquire the positional information of check point.

In one possible design, the orientation module is a G7A orientation module. G7A is a navigation positioning module supporting equal frequency points of BDS B1/GPS L1/GLONASS L1, and supports multi-frequency joint positioning and single-frequency positioning. The ultra-small size is only 10.6mm x 9.7mm x 2.2mm, and the method is very suitable for industrial application scenes with strict requirements on the size. And the packaging is realized by adopting 18-pin LCC, so that the paster process is convenient. G7A adopts the integrative chip of baseband plus radio frequency, provides high sensitivity, low-power consumption, low-cost location solution for the manufacturing of navigation positioning terminal products such as on-vehicle, shipborne, handheld and dress.

In one possible design, the CPLD is also electrically connected with a third buck converter unit, which is electrically connected with the positioning module. The third step-down converter unit is used for controlling the positioning module to enter a low-power-consumption working mode, and the module power supply is turned off when the module does not work.

Has the advantages that:

1. according to the Internet of things type leakage indicator, the processor mode of MCU and CPLD is adopted, the CPLD is independent of a hardware circuit, the product is stable, the hardware logic structure is unique, the installation mode of the current transformer is very convenient and fast, the current transformer is clamped into a low-voltage line, and the body equipment is installed after being placed in a meter box or fixed outside the meter box by a binding belt; the LORA module can wirelessly transmit detection data to realize remote checking of the electric leakage condition;

2. according to the Internet of things type leakage indicator provided by the utility model, through the arrangement of the positioning module, the position information can be uploaded to a system through the LORA, and the position information of the detection point can be obtained. The power supply optimization management is carried out through a plurality of buck converter units, the battery charging protection and the independent control of each part of circuit power supply are realized, the CPLD is used for optimizing and designing the circuit, the power consumption is saved, the electric leakage real-time performance is good, the positioning is realized, and the electric leakage fault positioning can be realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic connection diagram of a circuit module of an internet of things type leakage indicator provided by the utility model;

fig. 2 is a specific charging circuit diagram in an embodiment of the leakage indicator based on the internet of things provided by the utility model;

fig. 3 is a circuit diagram a of a first buck converter unit in an embodiment of the leakage indicator based on the internet of things provided by the utility model;

fig. 4 is a circuit diagram B of a specific first buck converter unit in an embodiment of the leakage indicator based on the internet of things provided by the utility model;

fig. 5 is a circuit diagram of a specific second buck converter unit in an embodiment of the leakage indicator based on the internet of things provided by the utility model;

fig. 6 is a circuit diagram of a third buck converter unit in an embodiment of the leakage indicator based on the internet of things provided by the utility model;

FIG. 7 is a circuit diagram of a specific metering unit in an embodiment of an Internet of things type leakage indicator provided by the present invention;

FIG. 8 is a specific MCU circuit diagram in an embodiment of an Internet of things type leakage indicator provided by the present invention;

fig. 9 is a specific CPLD circuit diagram in an embodiment of the leakage indicator of the internet of things provided by the present invention;

FIG. 10 is a circuit diagram of an interface for mounting a LORA module in an embodiment of an Internet of things type leakage indicator according to the present invention;

fig. 11 is a circuit diagram of a specific positioning module in an embodiment of the internet of things type leakage indicator provided by the utility model.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms.

As shown in fig. 1, the leakage indicator of the internet of things provided by the first aspect of the present invention includes a current transformer for detecting a current of a low-voltage line, a metering Unit electrically connected to the current transformer, a Micro Controller Unit (MCU) electrically connected to the metering Unit, a Complex Programmable Logic Device (CPLD) electrically connected to the MCU, and an LORA module electrically connected to the CPLD, where the LORA is a low-power consumption remote wireless communication technology and is specifically directly installed on an interface shown in fig. 10 by using the LORA module; and a power module for providing power to the circuitry of the indicator; the MCU is also electrically connected with a display module and a key module.

Specifically, as shown in fig. 1, the internet of things type leakage indicator is designed in a manner that a Current transformer, also called a Current Transformer (CT), is separated from a main body device, the CT transformer is connected to a low-voltage line to perform high-frequency high-precision sampling, a detection signal is input differentially, a high-precision professional chip built in the main body device performs leakage Current detection, and meanwhile, a leakage Current alarm threshold is configured locally to perform leakage Current out-of-limit judgment and generate a leakage Current alarm event. Specifically, the power module can be provided with a 5000mA high-capacity rechargeable battery, the endurance time can reach 30 days at most, the rechargeable battery can be repeatedly charged for use, the battery warning function can be realized, and a battery warning event can be generated when the electric quantity of the battery is lower than a warning threshold value.

Specifically, data such as leakage current, an out-of-limit event of leakage current, a battery alarm event and the like monitored by the internet-of-things type leakage indicator can be uploaded to the low-voltage edge fusion controller in a LoRa communication mode, and the low-voltage edge fusion controller can upload the received data to the master station system to realize the alarm function of the master station system.

Specifically, thing networking type leakage indicator can regard as a leakage inspection instrument, except possessing characteristics such as the sampling precision is high, duration is strong, and the mounting means is also very convenient, advances low voltage circuit with its CT mutual-inductor card, and body equipment is put into the table case or is fixed the installation completion outside the table case promptly with the ribbon, and simultaneously, can realize building the shelves fast through the two-dimensional code on the special debugging palm machine scanning body equipment.

Preferably, the power module includes a charging circuit and a storage battery, and the charging circuit includes a charger module, and specifically, the charging circuit is implemented as shown in fig. 2; the charger module is electrically connected with the storage battery and an external power supply and charges the storage battery; the charger module is that No. 6 pin and No. 7 pin of the charger U11 are electrically connected with the MCU.

Preferably, as shown in fig. 3 and 4, the storage battery is electrically connected to a first buck converter unit, and the first buck converter unit is electrically connected to the CPLD, the MCU and the LORA module. Specifically, the first buck converter unit comprises a BL9309 buck converter U7, a pin No. 4 of the buck converter U7 is electrically connected with a power supply of 5V, one end of a capacitor C13 and one end of a capacitor C14, the other end of the capacitor C13 and the other end of the capacitor C14 are both grounded, the power supply is provided by a storage battery, a pin No. 6 of the buck converter U7 is electrically connected with one end of a resistor R31, and the other end of the resistor R31 is grounded; a pin 3 of the buck converter U7 is electrically connected with one end of the inductor L4; the other end of the inductor L4 is electrically connected with one end of a resistor R15, one end of a capacitor C12, one end of a capacitor C11, one end of a capacitor C10 and a CPLD, and the other end of the resistor R15 is electrically connected with a No. 6 pin of a buck converter U7; the other end of the capacitor C12, the other end of the capacitor C11 and the other end of the capacitor C10 are all grounded; pin 1 of the buck converter U7 is electrically connected to one end of a resistor R16 and the MCU, and the other end of the resistor R16 is grounded. The first buck converter unit further comprises a BL9309 buck converter U6, a pin No. 4 of the buck converter U6 is electrically connected with a power supply of 5V, one end of a capacitor C8 and one end of a capacitor C9, the other end of the capacitor C8 and the other end of the capacitor C9 are both grounded, the power supply is provided by a storage battery, a pin No. 6 of the buck converter U6 is electrically connected with one end of a resistor R12, and the other end of the resistor R12 is grounded; a pin 3 of the buck converter U6 is electrically connected with one end of the inductor L1; the other end of the inductor L1 is electrically connected with one end of a resistor R23, one end of a capacitor C7, one end of a capacitor C32, one end of a capacitor C6 and the metering unit, and the other end of the resistor R23 is electrically connected with a No. 6 pin of the buck converter U6; the other end of the capacitor C7, the other end of the capacitor C32 and the other end of the capacitor C6 are all grounded; pin 1 of the buck converter U7 is connected to a 5V power supply.

Preferably, as shown in fig. 5, the storage battery is electrically connected to a second buck converter unit, and the second buck converter unit is electrically connected to the MCU and the metering unit.

Preferably, as shown in fig. 8, the MCU is an HC32L110C6PA chip. As shown in fig. 9, the CPLD is an H1C02N3Q32 chip.

Preferably, as shown in fig. 7, the metering unit includes an HLW8112 metering chip and an auxiliary circuit.

Preferably, as shown in fig. 11, the MCU is also electrically connected with a positioning module. The positioning module is a G7A positioning module. The CPLD is further electrically connected with a third buck converter unit, the third buck converter unit is electrically connected with the positioning module, and a specific embodiment of a circuit of the third buck converter unit is shown in fig. 6. The third step-down converter unit is used for controlling the positioning module to enter a low-power-consumption working mode, and the module power supply is turned off when the module does not work. G7A is a navigation positioning module supporting equal frequency points of BDS B1/GPS L1/GLONASS L1, and supports multi-frequency joint positioning and single-frequency positioning. The ultra-small size is only 10.6mm x 9.7mm x 2.2mm, and the method is very suitable for industrial application scenes with strict requirements on the size. And the packaging is realized by adopting 18-pin LCC, so that the paster process is convenient. G7A adopts the integrative chip of baseband + radio frequency, provides the location/navigation solution of high sensitivity, low-power consumption, low cost for the manufacturing of navigation positioning terminal products such as on-vehicle, shipborne, handheld and dress.

In conclusion, the utility model adopts the processor mode of MCU and CPLD, the CPLD is independent of a hardware circuit, the product is stable, the hardware logic structure is unique, the installation mode of the current transformer is very convenient, the current transformer is clamped into a low-voltage circuit, and the body equipment is installed after being placed in a meter box or fixed outside the meter box by a ribbon; can wireless transmission detect data through the LORA module, realize long-range electric leakage condition of looking over.

Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The Internet of things type leakage indicator is characterized by comprising a current transformer, a metering unit, an MCU, a CPLD, an LORA module and a power supply module, wherein the current transformer is used for detecting the current of a low-voltage line; the MCU is also electrically connected with a display module and a key module.

2. The internet of things-based leakage indicator of claim 1, wherein the power module comprises a charging circuit and a battery, the charging circuit comprising a charger module; the charger module is electrically connected with the storage battery and an external power supply and charges the storage battery; the charger module is TP4056 charger module, and No. 6 pin and No. 7 pin of TP4056 charger module are electrically connected with MCU.

3. The internet of things type leakage indicator of claim 2, wherein the battery is electrically connected with a first buck converter unit, the first buck converter unit electrically connected with the CPLD, the MCU and the LORA module.

4. The internet of things type leakage indicator of claim 2, wherein the battery is electrically connected with a second buck converter unit, the second buck converter unit electrically connecting the MCU with the metering unit.

5. The internet of things-type leakage indicator of claim 1, wherein the MCU is an HC32L110C6PA chip.

6. The internet of things-type leakage indicator of claim 1, wherein the CPLD is an H1C02N3Q32 chip.

7. The internet of things type leakage indicator of claim 1, wherein the metering unit comprises a HLW8112 metering chip and an auxiliary circuit.

8. The internet of things-type electrical leakage indicator of claim 1, wherein the CPLD is further electrically connected with a positioning module.

9. The internet of things-type leakage indicator of claim 8, wherein the location module is a G7A location module.

10. The internet of things-type leakage indicator of claim 8, wherein the CPLD is further electrically connected to a third buck converter unit, the third buck converter unit being electrically connected to the positioning module.