CN214895509U - Liquid crystal multifunctional electric power instrument - Google Patents

Abstract

The utility model relates to a multi-functional electric power instrument of liquid crystal, by the CPU module, the power module, measurement module and function module constitute, CPU module and power, the measurement, the equal two-way connection of function three module, the CPU module contains two-way connection and liquid crystal display between MCU and the storage controller, the one-way connection of man-machine interface, in the measurement module, the signal of interchange sampling collection is received and is transmitted to MCU by measurement chip, MCU analytic data makes the processing to the function module, including the relay output action, the receipt of input signal is kept apart to the on-off quantity opto-coupler, the transmiting output of analog quantity PWM ripples conversion direct current, the UART communication. Has the advantages that: the intelligent monitoring and alarming device has powerful and flexible monitoring and alarming functions, can meet the requirements of users to the maximum extent, changes the situations of single function, complex use and difficulty in spare parts of the conventional electric power instrument, is suitable for monitoring secondary power parameters of a drawer cabinet and a high-voltage switch cabinet, and is suitable for bidirectional connection of a CPU module and three modules of a power supply, metering and functions.

Description

Liquid crystal multifunctional electric power instrument

Technical Field

The utility model relates to an electrical apparatus technical field that is relevant relates to the multi-functional electric power instrument of liquid crystal particularly, powerful, nimble monitoring and alarming function that it has, but furthest's satisfying users ' requirement has changed electric power instrument's in the past single function, uses loaded down with trivial details, the situation of spare parts difficulty. The product performance is greatly improved, and simultaneously, a plurality of humanized designs are embodied.

Background

With the increasing demand for power utilization, intensive monitoring and management of power utilization is increasingly becoming an urgent need for power management. The intelligent integration level of the equipment produced by manufacturers at the present stage is different, the simple data measurement can be carried out in the aspect of basic functions, but the additional functions are in short supply, and the use is inconvenient. In order to make the user intuitively know whether the relevant line is normal or not, if the user needs additional functions, the manufacturer can provide a corresponding interface, connect an alarm device by setting a threshold value, or send a command of relevant operation. However, in terms of the market, the degree of intellectualization of the multifunctional electric power meter in use is not high, and continuous improvement and perfection are required, so that the liquid crystal multifunctional electric power meter is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multi-functional electric power instrument of liquid crystal to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the multifunctional liquid crystal power meter consists of CPU module, power supply module, metering module and functional module. The CPU module is connected with the power supply module, the metering module and the functional module in a bidirectional mode.

Furthermore, the CPU module consists of an MCU, a storage controller, a liquid crystal display and a man-machine interface, wherein the MCU sends a command liquid crystal to display information such as current, voltage, alarm and the like according to the command, and the control instrument can also be operated through keys of the man-machine interface.

Furthermore, the power supply module converts 85-265V alternating current or direct current into two paths of power supplies of 5V and 12V, wherein 5V is used for an MCU chip and an open circuit, and 12V is used for analog quantity transmission and switching value input.

Furthermore, the metering module consists of an alternating current sampling and metering chip. During work, the alternating current sampling module converts primary PT and CT into low signals required by the metering chip, then inputs data into the metering chip after filtering, and transmits the data to the MCU through communication between the metering chip and the MCU.

Furthermore, the functional module consists of switching value input, switching value output, analog quantity change and communication, and the MCU is electrically connected to the functional module so as to control each function on the functional module to work.

Wherein, the core of the device is MCU and metering chip, firstly, the MCU adopts NUC029LAN chip produced by Nuvoton Technology Corp of New Tang science and Technology Co., Ltd, Taiwan, China, and the chip has

The kernel can run up to 50MHz and also has 68 kbytes of flash memory for storing program code. And the sampling of the 8-channel 12-bit SAR ADC is supported, and all detection quantities of the multifunctional table can be met. UART, SPI, I2C type communication interface all have 2 ways, can satisfy multiple communication demand simultaneously. The metering chip is a V9203 chip produced by Hangzhou ten high-tech limited company, supports 7-channel voltage and current signal measurement, and has a full-wave/fundamental wave active energy metering error of less than 0.1% in a 10000:1 dynamic range and a full-wave/fundamental wave reactive energy metering error of less than 0.1% in a 5000:1 dynamic range.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. adopting a latest 32-bit MCU industrial microprocessor;

2. the real-time multi-task operating system and the C + + programming technology can realize on-line programming;

3. 4 paths of 4-20 mA direct current output can be set to correspond to any electric quantity (such as current, voltage, power and the like);

4. 4 switching value alarm outputs which can be set to correspond to any electric quantity (such as current, voltage, power and the like);

5. 4 paths of switching value input quantity;

6. 2-path 485 communication of different addresses;

7. the interchangeability of hardware is good, the convenience is brought to users to maintain and the quantity of spare parts is reduced;

8. the buckle replaces a screw to be installed, and the buckle can be directly installed on the cabinet body after being taken down, so that the production efficiency is improved;

9. the system has the advantages of IV-level anti-interference capability, small volume, low power consumption, good shock resistance, environmental protection;

10. abundant measurement and control functions are provided, and power measurement, output alarm and the like can be realized;

11. the system has a strong network communication function and supports double RS485 communication.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a hardware structure frame of a liquid crystal multifunctional electric power meter according to the present invention;

reference numerals:

a CPU module; 1-1. MCU; 1-2. a memory controller; 1-3. liquid crystal display; 1-4, a man-machine interface; a power supply module; 3. a metering module; 3-1, alternating current sampling; 3-2. measuring the chip; 4. a functional module; 4-1, inputting a switching value; 4-2, outputting the switching value; 4-3, analog quantity change; UART communication.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the multifunctional liquid crystal electric power meter according to the present invention includes a CPU module 1, an MCU (NUC 029LAN chip manufactured by taiwan new Tang science and technology Co., Ltd., china), a flash memory control chip (MB 85RC16PNF chip manufactured by fuji general Co., Ltd., japan), and liquid crystal displays 1-3 (XS 700490B liquid crystal manufactured by Jiangxi Xuanli Feng science and technology Co., Ltd.); a power supply module 2 (a 2-way power supply of AC/DCSK-5W type from the company of Japan is adopted, wherein a control chip of the power supply is an STR-A6059H chip produced by the company of Sankaochi Japan); a metering module 3, an alternating current sampling 3-1 (a TYCT21EM type current transformer produced by Nanjing Tongyue electronics) and a metering chip 3-2 (a V9203 chip produced by Hangzhou Wangao technology Co., Ltd.); the system comprises a functional module 4, a switching value output 4-2 (a loose PA1A-5V relay), a switching value input 4-1 (consisting of an EL357N optical coupler and a peripheral circuit produced by Taiwan hundred million light in China), an analog quantity 4-3 (consisting of an LM358 chip and a peripheral circuit produced by Texas instruments) and a communication UART 4-4 (consisting of a HYM3085EESA485 communication chip and a peripheral circuit produced by Wuhan Hao Ying microelectronics Ltd.).

The utility model is suitable for a secondary electric power parameter monitoring of drawer cabinet and high tension switchgear, powerful, nimble monitoring and alarming function that have, but furthest's satisfying users ' requirement has changed electric power instrument's single function in the past, uses loaded down with trivial details, the situation of spare parts difficulty. The product performance is greatly improved, and simultaneously, a plurality of humanized designs are embodied.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (2)

1. The liquid crystal multifunctional electric power instrument is characterized in that the CPU module (1) and the power module (2), the metering module (3) and the functional module (4) are connected in a bidirectional mode, the CPU module (1) comprises a bidirectional connection between an MCU (1-1) and a storage controller (1-2) and a unidirectional connection between a liquid crystal display (1-3) and a man-machine interface (1-4), signals collected by an alternating current sampling (3-1) in the metering module (3) are received by a metering chip (3-2) and transmitted to the MCU (1-1), and the MCU (1-1) analyzes data to process the functional module (4), the method comprises the steps of relay output action, receiving of a switching value optical coupling isolation input signal, converting of an analog quantity PWM wave into direct current, transmitting output and UART communication.

2. The multifunctional liquid crystal electric power instrument as claimed in claim 1, wherein the MCU (1-1) is a NUC029LAN chip manufactured by taiwan new and Tang science and technology, Inc. and the metering chip (3-2) is a V9203 chip manufactured by Hangzhou Wangao science and technology, Inc.

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