CN103941085A - Low-power-consumption electric energy acquisition device - Google Patents
Low-power-consumption electric energy acquisition device Download PDFInfo
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- CN103941085A CN103941085A CN201410156528.8A CN201410156528A CN103941085A CN 103941085 A CN103941085 A CN 103941085A CN 201410156528 A CN201410156528 A CN 201410156528A CN 103941085 A CN103941085 A CN 103941085A
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Abstract
The invention discloses a low-power-consumption electric energy acquisition device. The low-power-consumption electric energy acquisition device comprises an acquisition chip, a microprocessor, a display, a storage and a power module, and the low-power-consumption electric energy acquisition device further comprises a voltage transformer, a current transformer, a first low-pass filter and a second low-pass filter, wherein the first low-pass filter and the second low-pass filter are connected with the voltage transformer and the current transformer respectively; the first low-pass filter and the second low-pass filter are connected with the acquisition chip; the microprocessor is respectively connected with the displayer and the storage and connected with the acquisition chip through an SPI. According to the low-power-consumption electric energy acquisition device, a low-power-consumption processor chip and the high-integration-density electric energy acquisition chip are adopted for acquiring alternating-current electric energy for civil use, on the premise that the electric energy is acquired, the power consumption of the chips is reduced to the lowest level, and the alternating-current electric energy can be acquired while the low-power-consumption operation mode is pursued. Meanwhile, the networking function is further designed for the device, and a rear end control platform can acquire and control the electric energy of the device.
Description
Technical field
The invention belongs to applying electronic product technical field, relating to a kind of is the low-power consumption electric energy collection device that gathers civilian alternating current electric energy consumption.
Background technology
As long as be divided into two kinds for the collection of civilian AC energy at present: mechanical electronic mode and full electronic.
Mechanical electronic mode harvester is that exchange current voltage passes through coil, forms alternating magnetic field, and magnetic conductor rotating disk is arranged in alternating magnetic field, motor of similar formation, alternating magnetic field makes dial rotation, and velocity of rotation determines by field intensity, and the dial rotation number of turns is as the unit of metering electric energy.
Fig. 1 is the structured flowchart of existing full electronic electric energy collection device.As shown in Figure 1, full electronic electric energy collection device carries out electric resistance partial pressure by voltage, and electric current is carried out to small resistor sampling, and the equal proportion voltage and current that sampling obtains carries out digitized sampling conversion again.Utilize special IC to complete the product of voltage and current, carry out the integration of current/voltage product with chronomere, size according to integrated value is exported with the form direct proportion of pulse number, finally by pulsed drive watt-hour meter or digital indicator, completes the collection to electric energy.
But existing electric energy collection device power consumption is generally higher, does not meet the requirement of present environmental protection.And existing electric energy collection device only completes watt metering function, be only applicable to the occasion of watt metering demand, function singleness.
Summary of the invention
The present invention, in order to solve problems of the prior art, provides a kind of accurate collection energy consumption and the low low-power consumption electric energy collection device of harvester oneself power consumption.
For achieving the above object, the present invention adopts following technical scheme:
Low-power consumption electric energy collection device of the present invention, comprises acquisition chip, microprocessor, display, storer and power module; This device also comprises voltage transformer (VT), current transformer, the first low-pass filter being connected with voltage transformer (VT) summation current transformer respectively and the second low-pass filter; The first low-pass filter is connected with acquisition chip with the second low-pass filter; Microprocessor is connected with display, storer respectively, and is connected with acquisition chip by SPI interface; Microprocessor adopts MSP430F149 chip, and microprocessor idle condition in the course of the work enters sleep pattern, has regularly waken electric energy acquisition process up.
Described acquisition chip adopts CS5463 chip, CS5463 inside is provided with multiple electrical energy parameter acquisition modules, multiple electrical energy parameter be can gather, instantaneous voltage, electric current, power, applied power, active power, reactive power, meritorious first-harmonic, meritorious harmonic wave, idle first-harmonic, power factor and a-c cycle comprised; The mode of operation of CS5463 chip is low-speed mode, and data read and adopt the mode of interrupting, and open as required the electrical energy parameter acquisition module in acquisition chip, close without the electrical energy parameter acquisition module gathering.
On described microprocessor, be provided with multiple access interfaces based on 485 buses.
On described microprocessor, be connected with a group address toggle switch, by the mode of peripheral hardware dial-up, password and mode of operation be set.
Advantage and good effect that the present invention has are:
Low-power consumption electric energy collection device of the present invention, adopt low power processor chip and high integration electric energy acquisition chip to complete civilian AC energy collection, complete under the prerequisite of electric energy acquisition function, the power consumption of self is dropped to minimum, realize and complete the acquisition function to AC energy pursuing under low power operation pattern.This device also designs networking function simultaneously, meets rear end and controls electric energy acquisition and the control of platform to this device.
Brief description of the drawings
Fig. 1 is the structured flowchart of the full electronic electric energy collection device of prior art;
Fig. 2 is the structured flowchart of low-power consumption electric energy collection device of the present invention;
Fig. 3 is the program flow diagram of low-power consumption electric energy collection device of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, low-power consumption electric energy collection device of the present invention is described further.Following each embodiment is not only limitation of the present invention for the present invention is described.
Fig. 2 is the structured flowchart of low-power consumption electric energy collection device of the present invention.As shown in Figure 2, low-power consumption electric energy collection device of the present invention, comprises acquisition chip, microprocessor, display, storer and power module; This device also comprises voltage transformer (VT), current transformer, the first low-pass filter being connected with voltage transformer (VT) summation current transformer respectively and the second low-pass filter; The first low-pass filter is connected with acquisition chip with the second low-pass filter; Microprocessor is connected with display, storer and relay respectively, and is connected with acquisition chip by SPI interface.
On hardware circuit, microprocessor adopts MSP430F149 chip, MSP430F149 has 7 kinds of low-power consumption modes, under extremely low power dissipation pattern, minimum running current only needs 360nA, can meet various low-power consumption application scenario, and this processor is 16 bit processors, processing power is more powerful compared with 8 bit processor processing poweies, have the lifting of matter, the inner integrated hardware multiplier of this processor, can meet the calculation requirement compared with complicated algorithm simultaneously.Tradition electric energy collection device only completes watt metering function, be only applicable to the occasion of watt metering demand, the present invention is except completing watt metering, can also carry out algorithm process to electrical energy parameter, complete the measurement of measurement, reactive power, electric voltage frequency of such as power factor (PF) etc. according to electrical energy parameter.
Aspect electric energy acquisition, acquisition chip adopts CS5463 chip, CS5463 inside is provided with multiple electrical energy parameter acquisition modules, multiple electrical energy parameter be can gather, instantaneous voltage, electric current, power, applied power, active power, reactive power, meritorious first-harmonic, meritorious harmonic wave, idle first-harmonic, power factor and a-c cycle comprised; Also there is the functions such as the good phase compensation of system calibration simultaneously, adopt this to measure chip, can obtain a series of electrical energy parameters.Tradition electric energy meter has only completed the function of measuring of electric degree, other parameter of electric energy is not measured and is gathered.
Aspect power consumption, the oneself power consumption of this device special taking into account system in design process, device used and device mode of operation all adopt low-power consumption processing mode to design, and through actual measurement, this device running current is 1.55mA.
Aspect interface, on microprocessor, be provided with multiple access interfaces based on 485 buses.Control platform application for rear end 485 interfaces are provided, according to this device communication protocol, can read in real time current electrical energy parameter, for background application provides Data support, can realize parallel network savvy between many harvesters.
On microprocessor, be connected with a group address toggle switch, by the mode of peripheral hardware dial-up, password and mode of operation be set.This device is realized the collection, storage, demonstration and the transmission that under self low-power consumption mode, complete electrical energy parameter.
The principle of work of electric energy collection device of the present invention is as follows:
Alternating current 220V voltage is by current transformer and voltage transformer (VT) equal proportion alternating voltage and electric current, after allowing through low-pass filtering treatment, remove the high fdrequency component that induction obtains, send acquisition chip CS5463 to sample, microprocessor MSP430F149 completes the operation to CS5463 by SPI interface, finally read and obtain electrical energy parameter, the electrical energy parameter that microprocessor obtains by analysis, controls short in size liquid crystal display, local datastore and data upload etc.
In addition, the mode that microprocessor interrupts by serial ports, received the control command that background server issues, and data protocol form according to a preconcerted arrangement carries out command analysis, and the command context obtaining according to parsing, completed data and extracted, relay operation etc.
Device arranges password and mode of operation by the mode of peripheral hardware dial-up, and after powering on, after initialization, first microprocessor reads dial-up state is set, and sets self address, and background server is accessed by this addressing of address.Between device and background server, communicate by 485 bus modes.
Device adopts powered battery mode, and because low power mode of operation is considered in device global design, 580mAH battery is without 1 year of continuously-running under charge condition.Meet low power dissipation design requirement.
Fig. 3 is the program flow diagram of low-power consumption electric energy collection device of the present invention.As shown in Figure 3, after the program of this device starts, first MSP430F149 completes the initialization to self internal clocking, serial ports, SPI interface, interruption etc., then reads the state that arranges of dial-up, judges the address that arranges of current mode of operation and self.Under drainage pattern, microprocessor completes the initialization to acquisition chip CS5463, after initialization success, read the electrical energy parameter that current chip collects, comprise voltage, electric current, frequency, power, power factor (PF) etc., read and obtain electrical energy parameter calculating residue electric degree, and real-time storage is in ferroelectric eeprom memory, drive short in size liquid crystal to show, gatherer process completes simultaneously.Under calibration mode, MSP430F149 arranges CS5463 and enters calibration mode, and respective alignment parameter read-in, to the inner corresponding registers of CS5463, is completed to the calibration to CS5463, calibrates and is successfully back into merit mark, and calibration process generally only carries out once.
In normal gatherer process, serial ports receives by interrupt mode the data that background server end sends, and MSP430F149, according to making an appointment communication protocol, receives data, resolves the data that receive, judgement order, and act accordingly.Order is divided into two classes, and a class is for pilot relay break-make, and a class is used for extracting electrical energy parameter and uses for background monitoring.Receive serial data, and after complete operation, the corresponding transmit operation of serial ports is successfully replied.
For implement device low-power consumption requirement, in hardware design, all pull-up resistors all adopt the weak pull-up of 2M Ω, make bleedout electric current at microampere order; Display screen adopts short in size liquid crystal, and closes backlightly, makes display screen power consumption below 50 microamperes; Circuit voltage stabilizing chip adopts high efficiency switch type voltage stabilizing chip LT3480, and static working current is extremely low, ten microamperes of left and right; Outside ferroelectric storage IIC interface adds weak pull-up, adopts low-speed mode; Low-pass filter adopts passive filter, further reduces power consumption; The idle pin of microprocessor does grounding, avoids owing to drawing the leakage current causing to dissipate on inside, and crystal oscillator adopts 32.768KHz.
On Software for Design, after device start, first complete the setting of microprocessor self dominant frequency, MSP430F149 processor work dominant frequency is set to 32.768KHz, serial ports Configuration of baud rate is 1200bps, data receiver adopts Interrupt Processing Model, liquid crystal refreshing frequency is reduced to once per second, storage operation adopts inner temporary, writing again multibyte mode carries out, reduce the frequent read-write operation to storer, the mode of operation of CS5463 is set to low-speed mode, data read the mode of interrupting that adopts, according to practical application request, open the functional module in acquisition chip, close without the electrical energy parameter module gathering.Microprocessor idle condition in the course of the work enters sleep pattern, has regularly waken cycle and taking corresponding operation up.
Low-power consumption electric energy collection device of the present invention has the following advantages:
1, system low-power consumption operation, normal work is average current 1.55mA, only needs small-capacity cells power supply, without under charge condition, can 1 year of continuous working, reduce the energy consumption of electric energy collection device self, reach the object of energy-conserving and environment-protective.
2, collection electrical energy parameter is detailed, comprise instantaneous voltage, electric current, power, applied power, active power, reactive power, meritorious first-harmonic, meritorious harmonic wave, idle first-harmonic, power factor, a-c cycle etc., can be background monitoring server a series of energy datas are provided, requirements extend demand.
3, provide the access interface based on 485 buses, formulated access protocal form and data encryption mode, facilitate background server end reliable access, realize reliable and stable monitoring in real time.Unified bus mode, provides the possibility on physical link for realizing the networking of many equipment rooms.
4, hardware calculation function is strong, and microprocessor carries hardware multiplier, can complete fast multiplying, for example, can realize fast current/voltage time differential and integral operation, FFT conversion etc., can realize some compared with complicated algorithm by hardware that is:, and extended application is strong.
Claims (4)
1. a low-power consumption electric energy collection device, comprises acquisition chip, microprocessor, display, storer and power module; It is characterized in that: this device also comprises voltage transformer (VT), current transformer the first low-pass filter being connected with voltage transformer (VT) summation current transformer respectively and the second low-pass filter; The first low-pass filter is connected with acquisition chip with the second low-pass filter; Microprocessor is connected with display, storer respectively, and is connected with acquisition chip by SPI interface; Microprocessor adopts MSP430F149 chip, and microprocessor idle condition in the course of the work enters sleep pattern, has regularly waken electric energy acquisition process up.
2. low-power consumption electric energy collection device according to claim 1, it is characterized in that: acquisition chip adopts CS5463 chip, CS5463 inside is provided with multiple electrical energy parameter acquisition modules, multiple electrical energy parameter be can gather, instantaneous voltage, electric current, power, applied power, active power, reactive power, meritorious first-harmonic, meritorious harmonic wave, idle first-harmonic, power factor and a-c cycle comprised; The mode of operation of CS5463 chip is low-speed mode, and data read and adopt the mode of interrupting, and open as required the electrical energy parameter acquisition module in acquisition chip, close without the electrical energy parameter acquisition module gathering.
3. low-power consumption electric energy collection device according to claim 2, is characterized in that: on microprocessor, be provided with multiple access interfaces based on 485 buses.
4. low-power consumption electric energy collection device according to claim 2, is characterized in that: on microprocessor, be connected with a group address toggle switch, by the mode of peripheral hardware dial-up, password and mode of operation be set.
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| CN201410156528.8A CN103941085A (en) | 2014-04-18 | 2014-04-18 | Low-power-consumption electric energy acquisition device |
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Cited By (3)
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| CN104181892A (en) * | 2014-08-27 | 2014-12-03 | 傲视恒安科技（北京）有限公司 | Device and system for monitoring energy consumption of machine room |
| CN104678168A (en) * | 2015-02-08 | 2015-06-03 | 宜春市脉恩多能科技有限公司 | Miniature power consumption detection device of electric appliance |
| CN104977460A (en) * | 2015-06-23 | 2015-10-14 | 中山市木易万用仪器仪表有限公司 | Power recording device |
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Application publication date: 20140723 |