CN202661546U - Electric energy data acquisition device based on double central processing units (CPU) - Google Patents

Electric energy data acquisition device based on double central processing units (CPU) Download PDF

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Publication number
CN202661546U
CN202661546U CN2012202574810U CN201220257481U CN202661546U CN 202661546 U CN202661546 U CN 202661546U CN 2012202574810 U CN2012202574810 U CN 2012202574810U CN 201220257481 U CN201220257481 U CN 201220257481U CN 202661546 U CN202661546 U CN 202661546U
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module
cpu
data acquisition
electric energy
device based
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CN2012202574810U
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欧阳森
石怡理
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • Y02B60/50

Abstract

The utility model discloses an electric energy data acquisition device based on double central processing units (CPU). The electric energy data acquisition device based on the double CPUs comprises a power module, a data acquisition module, a communication module, a man-machine interaction module, a first CPU module and a second CPU module, wherein the first CPU module is used for processing and analyzing data acquired, and the second CPU module is used for processing man-machine interaction and communication function. The power module and the data acquisition module are respectively connected with the first CPU module, the communication module and the man-machine interaction module are respectively connected with the second CPU module, the data acquisition module is further connected with the power module, and the first CPU module and the second CPU module are connected in serial peripheral interface (SPI) mode. The double CPUs are used, so that the efficiency of electric energy acquisition and transmission is improved. The achieved wireless communication and the simplified design enable the device to be applied to various environments with networks, cost is low, efficiency is high, and applicability is strong.

Description

A kind of data acquisition for electric energy device based on two CPU
Technical field
The utility model relates to the harvester of electric energy data in the system for distribution network of power, but is specifically related to a kind of distribution network electric energy data collector of the real-time communication based on two CPU.
Background technology
Under the overall situation of energy-saving and emission-reduction, electric system need to have a large amount of intelligent terminals to carry out data acquisition for electric energy, especially has the distribution network system of mass data, as the important foundation of administration of energy conservation, energy-saving monitoring.Electrical energy collecting device or kilowatt meter reading-out system is of a great variety in the market, but there is following shortcoming mostly in these products in the practical application of power distribution network: 1) mainly for the major network design, cost is higher, and is not satisfactory in the application of distribution; 2) major part only adopts a CPU to be used for data to process and realize the functions such as man-machine interaction, communication, and speed is slow, can't finish the Real-time Collection to the multiple points and items electric flux; 3) means of communication is single, and used technological means is more backward, is unfavorable for realizing the network monitoring of distribution network electric energy.
The utility model content
For the above-mentioned shortcoming and deficiency that overcomes prior art, the purpose of this utility model is to provide a kind of, cheap, high efficiency data acquisition for electric energy device based on two CPUs exploitation for distribution.
The purpose of this utility model is achieved through the following technical solutions:
A kind of data acquisition for electric energy device based on two CPU comprises power module, data acquisition module, communication module, human-computer interaction module, for the treatment of a CPU module of analyzing the data that gather with for the treatment of the 2nd CPU module of man-machine interaction and communication function;
Described power module, data acquisition module are connected with a CPU module respectively;
Described communication module, human-computer interaction module are connected with the 2nd CPU module respectively;
Described data acquisition module also is connected with power module;
A described CPU module is connected by the SPI mode with described the 2nd CPU module.
Described data acquisition module comprises current/voltage acquisition module and frequency acquisition module, and described current/voltage acquisition module, described frequency acquisition module are connected with a CPU module respectively, and described current/voltage acquisition module also is connected with power module.
Described current/voltage acquisition module comprises three-phase and neutral line voltage and current signal acquisition channel interface, signal conditioning circuit, programmable amplifying circuit, filtering circuit, A/D converter, external crystal oscillation circuit, described three-phase and neutral line voltage and current signal acquisition channel interface, signal conditioning circuit, programmable amplifying circuit, filtering circuit, A/D converter connect successively, and described A/D converter also is connected with power module, a CPU module respectively.
Described frequency acquisition module comprises frequency collection feeder connection, signal conditioning circuit and the frequency tracker that connects successively.
Described communication module comprises RS232 communication unit and Zigbee communication unit.
Described A/D converter is made of two MAX125AEAX chips.
Described the 2nd CPU module also is connected with temperature measurement module.
Described the 2nd CPU module also is connected with outside real-time clock module, and described outside real-time clock module is connected with watchdog reset circuit.
Compared with prior art, the utlity model has following advantage and beneficial effect:
(1) adopt two CPU, draw the Real-Time Monitoring result by a CPU resume module analysis, the 2nd CPU module reads this monitoring result and controls human-computer interaction module and the real-time response of communication module by the SPI interface.This working method has improved the work efficiency of CPU, does not affect man-machine interaction and upload the speed of Monitoring Data when realizing real-time data analysis, and be convenient to the expansion of future feature module.
(2) data acquisition module adopts 4 voltages, 4 electric currents and 1 frequency signal interface, and the device of simplifying design is cheap, applicability is strong, especially can promote in distribution;
(3) adopt RS232 and two kinds of communication modes of Zigbee, the Zigbee wireless communication function that realizes without the wiring restriction, can be applicable to various distribution environment, such as office buildings, dwelling house, all kinds of manufacturing enterprises workshop etc., help to promote the monitoring of distribution data network;
(4) data acquisition module has adopted programmable amplifying circuit, and the program control enlarging function of realizing has strengthened applicability of the present utility model.
Description of drawings
Fig. 1 is that the utility model is based on the composition schematic diagram of the data acquisition for electric energy device of two CPU.
Fig. 2 is the composition schematic diagram of data acquisition module of the present utility model.
Fig. 3 is that the utility model is based on the workflow diagram of the data acquisition for electric energy device of two CPU.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, the present embodiment is based on the data acquisition for electric energy device of two CPU, comprises power module, data acquisition module, communication module, human-computer interaction module, for the treatment of the CPU module 1 of analyzing the data that gather with for the treatment of the CPU module 2 of man-machine interaction and communication function; Described power module, data acquisition module are connected with CPU module 1 respectively; Described communication module, human-computer interaction module are connected with CPU module 2 respectively; Described data acquisition module also is connected with power module; Described the 2nd CPU module also is connected with outside real-time clock module, temperature measurement module, and described outside real-time clock module is connected with watchdog reset circuit.Described human-computer interaction module is provided with LCDs and keyboard.
CPU module 1 is ATmega128-A with CPU module 2, is the high-performance that adopts senior risc architecture, the 8-bit microprocessor of low-power consumption, meets the functional of this device and economy requirement.Data collecting module collected is also changed outside three-phase and neutral line voltage and current signal and frequency signal, draw the Real-Time Monitoring result by CPU module 1 Treatment Analysis, CPU module 2 reads this monitoring result and controls human-computer interaction module and the real-time response of communication module by the SPI interface.This working method has improved the work efficiency of CPU, does not affect man-machine interaction and upload the speed of Monitoring Data when realizing real-time data analysis, and be convenient to the expansion of future feature module.
Outside real-time clock module provides real-time clock to CPU module 2, and has watchdog reset circuit to monitor the working procedure of CPU module 2; CPU module 2 links to each other with temperature measurement module, but by connecing outside AD590 measures ambient temperature; Keyboard in the human-computer interaction module can be used for the input parameter setting, and the TG12864B-03T interface is adopted in liquid crystal display, realizes showing in real time the function of Monitoring Data.
Communication module provides two kinds of communication modes (RS232 and Zigbee), can utilize wherein a kind of communication modes to upload Real-time Monitoring Data to main website such as needs.The Zigbee communication technology provides the communication modes of low-power consumption, near radio, is highly suitable for the data acquisition for electric energy device of distribution, is conducive to applying of electrical energy collecting device on a large scale; And the RS232 communication unit can also expand to the communication modes of GPRS.
As shown in Figure 2, described data acquisition module comprises current/voltage acquisition module and frequency acquisition module, described current/voltage acquisition module be connected frequency acquisition module and be connected with CPU module 1 respectively, described current/voltage acquisition module also is connected with power module.
As shown in Figure 2, described current/voltage acquisition module comprises three-phase and neutral line voltage and current signal acquisition channel interface (comprising 4 voltages and 4 electric current Real-time Collection channel interfaces), signal conditioning circuit, programmable amplifying circuit, filtering circuit, A/D converter, external crystal oscillation circuit, described three-phase and neutral line voltage and current signal acquisition channel interface, signal conditioning circuit, programmable amplifying circuit, filtering circuit, A/D converter connect successively, and described A/D converter also is connected with power module, CPU module 1 respectively; Wherein said A/D converter is made of two MAX125AEAX chips.Described frequency acquisition module comprises frequency collection feeder connection, signal conditioning circuit and the frequency tracker that connects successively.Outside initialize signal can be obtained by secondary mutual inductor or this device at scene, wherein obtain to be fit to the signal of used electric energy meter range behind three-phase and neutral line voltage and current signal process signal condition and the programmable amplifying circuit, via the outer higher hamonic wave of filtering circuit filtering measurement range, carry out data-switching by 10 A/D converters (adopting the MAX125AEAX chip), directly be sent to CPU module 1 after the conversion; Voltage signal obtains to be sent to CPU module 1 behind the frequency signal after being processed by frequency tracker through the adjustment of signal conditioning circuit again.
MAX125AEAX provides power supply by the external power source module, and the clock signal of 16MHz is provided by external crystal oscillation circuit, and its sampling precision satisfies this matching requirements.MAX125AEAX is 4 path 10 position A/D devices, and conversion accuracy is high, switching rate high (133ksps), and power consumption is little, and its transformation result exports in order with the form of complement code, so MAX125AEAX satisfies the requirement of this device fully.
As shown in Figure 3, the course of work of the present utility model is as follows: after starting working, at first initiating hardware system and system autodiagnosis, CPU module 1 is after receiving the look-at-me of acquisition module, the reading information data, and judge whether signal data is all ready, as all not ready, then continue to wait for look-at-me read signal data; If all ready, CPU module 1 is carried out the analytical calculation of every electric flux; CPU module 2 reads this monitoring result by the SPI interface, and the response interactive command is also preserved parameters or shown monitoring information; If pending communication data event is arranged, then according to selected communication interface Monitoring Data is sent to main website.
Above-described embodiment is the better embodiment of the utility model; but embodiment of the present utility model is not limited by the examples; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.

Claims (8)

1. data acquisition for electric energy device based on two CPU, it is characterized in that, comprise power module, data acquisition module, communication module, human-computer interaction module, for the treatment of a CPU module of analyzing the data that gather with for the treatment of the 2nd CPU module of man-machine interaction and communication function;
Described power module, data acquisition module are connected with a CPU module respectively;
Described communication module, human-computer interaction module are connected with the 2nd CPU module respectively;
Described data acquisition module also is connected with power module;
A described CPU module is connected by the SPI mode with described the 2nd CPU module.
2. the data acquisition for electric energy device based on two CPU according to claim 1, it is characterized in that, described data acquisition module comprises current/voltage acquisition module and frequency acquisition module, described current/voltage acquisition module, described frequency acquisition module are connected with a CPU module respectively, and described current/voltage acquisition module also is connected with power module.
3. the data acquisition for electric energy device based on two CPU according to claim 2, it is characterized in that, described current/voltage acquisition module comprises three-phase and neutral line voltage and current signal acquisition channel interface, signal conditioning circuit, programmable amplifying circuit, filtering circuit, A/D converter, external crystal oscillation circuit, described three-phase and neutral line voltage and current signal acquisition channel interface, signal conditioning circuit, programmable amplifying circuit, filtering circuit, A/D converter connect successively, and described A/D converter also is connected with power module, a CPU module respectively.
4. the data acquisition for electric energy device based on two CPU according to claim 2 is characterized in that, described frequency acquisition module comprises frequency collection feeder connection, signal conditioning circuit and the frequency tracker that connects successively.
5. the data acquisition for electric energy device based on two CPU according to claim 1 is characterized in that, described communication module comprises RS232 communication unit and Zigbee communication unit.
6. the data acquisition for electric energy device based on two CPU according to claim 3 is characterized in that, described A/D converter is made of two MAX125AEAX chips.
7. the data acquisition for electric energy device based on two CPU according to claim 1 is characterized in that, described the 2nd CPU module also is connected with temperature measurement module.
8. the data acquisition for electric energy device based on two CPU according to claim 1 is characterized in that, described the 2nd CPU module also is connected with outside real-time clock module, and described outside real-time clock module is connected with watchdog reset circuit.
CN2012202574810U 2012-05-31 2012-05-31 Electric energy data acquisition device based on double central processing units (CPU) Expired - Lifetime CN202661546U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103245852A (en) * 2013-04-16 2013-08-14 华南理工大学 Power quality monitoring device for power distribution network based on data acquisition card
CN110007137A (en) * 2019-05-06 2019-07-12 国网四川省电力公司电力科学研究院 A kind of intelligent electric energy meter merging multiple terminal monitoring function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103245852A (en) * 2013-04-16 2013-08-14 华南理工大学 Power quality monitoring device for power distribution network based on data acquisition card
CN110007137A (en) * 2019-05-06 2019-07-12 国网四川省电力公司电力科学研究院 A kind of intelligent electric energy meter merging multiple terminal monitoring function
CN110007137B (en) * 2019-05-06 2022-02-01 国网四川省电力公司电力科学研究院 Intelligent electric energy meter integrating multiple terminal monitoring functions

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