CN201000463Y - Novel ultra-low power consumption digital type power parameter measuring meter - Google Patents
Novel ultra-low power consumption digital type power parameter measuring meter Download PDFInfo
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- CN201000463Y CN201000463Y CNU200720034400XU CN200720034400U CN201000463Y CN 201000463 Y CN201000463 Y CN 201000463Y CN U200720034400X U CNU200720034400X U CN U200720034400XU CN 200720034400 U CN200720034400 U CN 200720034400U CN 201000463 Y CN201000463 Y CN 201000463Y
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Abstract
The utility model relates to a novel ultra low power consumption digital electric power parameter measuring instrument. The utility model is characterized in that the utility model comprises a measurement signal sampling part (1), an A/D conversion circuit (2), a CPU processor (3), a timer (4), an internal information memory (5), an LCD liquid crystal driver and display part (6) and a power battery (7), wherein the measurement signal sampling part (1) is connected with the A/D conversion circuit (2), the A/D conversion circuit (2) is connected with the CPU processor (3), the CPU processor (3) is respectively connected with the timer (4), the internal information memory (5), the LCD liquid crystal driver and display part (6), and the A/D conversion circuit (2) contains the voltage reference. The utility model can continuously work for many years only depending on the power by a battery, without the auxiliary power connected outside.
Description
Technical field:
The utility model relates to a kind of measurement instrument.Be specifically related to a kind of novel super low-power consumption digital electric force parameter measurement instrument.Can be used for parameters of electric power such as measuring voltage, electric current, power, power factor, frequency.Belong to the electronic instrument technical field.
Background technology:
In electric system, generally need use various electric instruments and come parameters of electric power such as voltage, electric current, power, power factor, frequency are monitored in real time, and show with various forms such as pointer, numerals.Early stage electric instrument is indicated these parameters of electric power by pointer, and these tables also claim analog pointer gauge.Its advantage is with low cost and need not connects complementary power supply in the outside, but that shortcoming is a precision is low, can't be intelligent, show directly perceived and measurement parameter single.So progressively replaced in the market by digital electric power instrument.Digital electric power instrument is more directly perceived after adopting numeral to show, because make measurement more accurate after having adopted electronic circuit, make behind the increase CPU that in electronic circuit digital instrument can realize that a table measuring multiple parameters, setting able to programme, data remote realize that robotization is checked meter etc.But also because digital instrument adopts electronic circuit work, these electronic circuits need complementary power supply ability operate as normal, so increased the engineering wiring.Adopt external power source to have many unfavorable in addition: such as for directly by the instrument of electrical network alternating current 220V power supply, because at present a lot of local poor quality power supplys of electrical network often are subjected to the improper high pressure of electrical network, big current affects easily and damage, cause instrument to be damaged; Some adopts the instrument of Switching Power Supply often to design the improper important source factor that has become mains by harmonics.As adopting not by the complementary power supply of outside connection, but by the battery-powered method of internal electrical, powered battery is limited in one's ability, general equipment can not surpass some months by the powered battery stream time, so some digital multimeter, digital water meter, digital gas meter etc. all are intermittence work, use the long period guaranteeing, but be not allowable clearance work, need continue to monitor for power measure meters.So how solving power consumption, battery service life is prolonged is key point.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned deficiency, provide a kind of need not outside connect complementary power supply only depend on powered battery also can continuous working for many years and measure the novel super low-power consumption digital electric force parameter measurement instrument of parameters of electric power such as display voltage, electric current, power, power factor, frequency.
The purpose of this utility model is achieved in that a kind of novel super low-power consumption digital electric force parameter measurement instrument, it is characterized in that it comprises: measuring-signal sampling part, A/D change-over circuit, CPU processor, timer, internal information storer, LCD liquid crystal drive and display part and supplying cell, the measuring-signal sampling part links to each other with the A/D change-over circuit, the A/D change-over circuit links to each other with the CPU processor, the CPU processor links to each other with timer, internal information storer and LCD liquid crystal drive and display part respectively, and the A/D change-over circuit contains voltage reference.
The novel super low-power consumption digital electric of the utility model force parameter measurement instrument, the liquid crystal display drive circuit of described A/D change-over circuit, CPU processor, timer, internal information storer and LCD liquid crystal drive and display part is integrated in the single-chip microcomputer.
Sample of signal partly is used for converted input signal, and tested electric current and voltage forceful electric power conversion of signals is become to be fit to A/D switch analog voltages small-signal.
The voltage analog small-signal that the A/D change-over circuit is partly brought sample of signal is done analog/digital conversion, and the digital signal after will changing is given the CPU processor and done calculating.
The CPU processor is then being served as work such as calculating and control the A/D change-over circuit.
Timer is being served as timing working, when timing arrives, can be started working by CPU control A/D change-over circuit.
The important information that the internal information storer is commonly used with some is done preservation, loss of data during with the free of replacement battery.
LCD liquid crystal drive and display part are born and are shown the measured signal data.
Power supply is then provided by common 3.6V lithium battery.
The core of foregoing circuit all is integrated in the single-chip microcomputer.These circuit also are the parts of power consumption.Common A/D power consumption will reach several mA at least, and the A/D change-over circuit required voltage benchmark that will mention in addition generally also will reach several mA, and common CP U working current also is the mA rank in addition.And the utility model adopts single-chip microcomputer originally as the super low-power consumption chip, and wherein the power consumption of CPU processor normally is more than 200 μ A between active stage, and it has five kinds of energy-saving modes, the minimum 0.1 μ A that reaches.The minimum 1mA that reaches of A/D change-over circuit that it is inner integrated, voltage reference 200 μ A.These power consumptions are all far below the circuit of routine, and certain above-mentioned power consumption integral body is added up still too big with regard to powered battery, if but these circuit are opened respectively at times, so just can be so that average consumed cur-rent is lower.Just because of above-mentioned these circuit all integrate, so just make the time-sharing work that might control the each several part circuit by software very easily, the LCD liquid crystal display is then adopted in the display part in addition, and power consumption is also with regard to 2～3 μ A.
Therefore the utility model need not outside connect complementary power supply only depend on powered battery also can continuous working for many years and measure parameters of electric power such as display voltage, electric current, power, power factor, frequency.
Description of drawings:
Fig. 1 is the structured flowchart of the novel super low-power consumption digital electric of the utility model force parameter measurement instrument.
Fig. 2 is the flow chart of the novel super low-power consumption digital electric of the utility model force parameter measurement instrument.
Embodiment:
Referring to Fig. 1, the novel super low-power consumption digital electric of the utility model force parameter measurement instrument mainly is made up of measuring-signal sampling part, A/D change-over circuit (containing voltage reference), CPU processor, timer, internal information storer, LCD liquid crystal drive and display part and power supply (battery) part.Wherein the liquid crystal display drive circuit of A/D change-over circuit, CPU processor, timer, internal information storer and LCD liquid crystal drive and display part is integrated in the single-chip microcomputer, the measuring-signal sampling part links to each other with the A/D change-over circuit, the A/D change-over circuit links to each other with the CPU processor, the CPU processor links to each other with timer, internal information storer and LCD liquid crystal drive and display part respectively, and the A/D change-over circuit contains voltage reference.
Principle of work:
Referring to Fig. 1, sample of signal part becomes tested electric current and voltage forceful electric power conversion of signals the A/D change-over circuit of giving single-chip microcomputer inside behind the aanalogvoltage small-signal, after the timer timing arrives, the temporary transient CPU that activates closes timer earlier, then A/D switch and reference switches are closed and open the A/D change-over circuit, when the A/D revolution change once finish after, send RAM to preserve the A/D transformation result, and judge whether the A/D conversion times reaches N time that presets, if be less than then continue A/D conversion,, then can close A/D and voltage reference if N time is finished, and activate CPU and make and enter master routine and make the A/D transformation result and analyze and calculate, and send LCD liquid crystal display with result of calculation.Such working cycle finishes, and opens timer afterwards once more, and pass CPU makes it enter energy-saving mode.Provide power supply by lithium battery, the internal information storer is used for preserving the significant data after the power down.
Programmed control:
Referring to Fig. 2, can very clearly calculate the Overall Power Consumption of instrument by flow chart, behind the power-up initializing, CPU enters energy-saving mode (at this moment having only timer opening), consumption has only 2 μ A, add liquid crystal display 3 μ A, always have 5 μ A, continued 980ms during this period of time, regularly interrupted, CPU has been activated temporarily (break period is very short up to timer, after withdrawing from, interruption still can close CPU automatically, so current sinking can be ignored) with timeing closing device and unlatching A/D and voltage reference, measured signal is a 20ms cycle power frequency component, just A/D making alive benchmark will be worked always in this section 20ms time, the about 1200 μ A of its wastage in bulk or weight electric current, 20ms activates CPU after converting and does of short duration calculating and display process because be μ s level during this period of time, so the interior electric current of average 1S very I ignore.Close A/D and voltage reference afterwards once more and drive timer and enter next circulation.Whole electric current distributes: being 5 μ A in the preceding 980ms, is 1200 μ A in the back 20ms, and average current is lower than 30 μ A in the whole 1S clock.The lithium battery working time with 2.4Ah is about 9.2 years of 2400/0.03=80000h, considers battery consistency, and factor conservative estimations such as deterioration are 8 years.Can also just use the longer time if under the situation that cost allows, strengthen battery capacity.
Claims (2)
1, a kind of novel super low-power consumption digital electric force parameter measurement instrument, it is characterized in that it comprises: measuring-signal sampling part (1), A/D change-over circuit (2), CPU processor (3), timer (4), internal information storer (5), LCD liquid crystal drive and display part (6) and supplying cell (7), measuring-signal sampling part (1) links to each other with A/D change-over circuit (2), A/D change-over circuit (2) links to each other with CPU processor (3), CPU processor (3) respectively with timer (4), internal information storer (5) links to each other with LCD liquid crystal drive and display part (6), and A/D change-over circuit (2) contains voltage reference.
2, a kind of novel super low-power consumption digital electric force parameter measurement instrument according to claim 1, it is characterized in that: the liquid crystal display drive circuit (6.1) of described A/D change-over circuit (2), CPU processor (3), timer (4), internal information storer (5) and LCD liquid crystal drive and display part is integrated in the single-chip microcomputer (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720034400XU CN201000463Y (en) | 2007-01-31 | 2007-01-31 | Novel ultra-low power consumption digital type power parameter measuring meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720034400XU CN201000463Y (en) | 2007-01-31 | 2007-01-31 | Novel ultra-low power consumption digital type power parameter measuring meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201000463Y true CN201000463Y (en) | 2008-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720034400XU Expired - Lifetime CN201000463Y (en) | 2007-01-31 | 2007-01-31 | Novel ultra-low power consumption digital type power parameter measuring meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN201000463Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806829A (en) * | 2010-04-20 | 2010-08-18 | 中兴通讯股份有限公司 | Power consumption testing device of active equipment and method |
| CN106771440A (en) * | 2017-01-03 | 2017-05-31 | 张涉应 | A kind of single-phase liquid crystal ammeter and its control method for preventing power stealing |
| CN110412325A (en) * | 2019-08-08 | 2019-11-05 | 电子科技大学 | Wireless dummy oscillograph and its power consumption dynamic management approach |
-
2007
- 2007-01-31 CN CNU200720034400XU patent/CN201000463Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806829A (en) * | 2010-04-20 | 2010-08-18 | 中兴通讯股份有限公司 | Power consumption testing device of active equipment and method |
| CN101806829B (en) * | 2010-04-20 | 2013-07-03 | 中兴通讯股份有限公司 | Power consumption testing device of active equipment and method therefor |
| CN106771440A (en) * | 2017-01-03 | 2017-05-31 | 张涉应 | A kind of single-phase liquid crystal ammeter and its control method for preventing power stealing |
| CN106771440B (en) * | 2017-01-03 | 2019-08-13 | 宁夏隆基宁光仪表股份有限公司 | A kind of control method for the single-phase liquid crystal ammeter preventing power stealing |
| CN110412325A (en) * | 2019-08-08 | 2019-11-05 | 电子科技大学 | Wireless dummy oscillograph and its power consumption dynamic management approach |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU SFERE ELECTRIC CO., LTD. Free format text: FORMER NAME: JIANGSU SFERE ELECTRIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 214434 No. 99 East Chengjiang Road, Jiangsu, Jiangyin Patentee after: Jiangyin Sfere Electric Co., Ltd. Address before: 214434 No. 99 East Chengjiang Road, Jiangsu, Jiangyin Patentee before: Jiangsu Sfere Electric Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080102 |