CN104882918B - A kind of digital measuring instrument obtaining electric energy from tested electric signals - Google Patents
A kind of digital measuring instrument obtaining electric energy from tested electric signals Download PDFInfo
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- CN104882918B CN104882918B CN201510191518.2A CN201510191518A CN104882918B CN 104882918 B CN104882918 B CN 104882918B CN 201510191518 A CN201510191518 A CN 201510191518A CN 104882918 B CN104882918 B CN 104882918B
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Abstract
A kind of digital measuring instrument obtaining electric energy from tested electric signals, it can be under the premise of not influencing measurement accuracy, by the assistance of microcontroller on instrument measurement terminal and in the charging energy-storing circuit and instrument that connect, enable instrument according to the energy properties of tested electric signals, take the circumstances into consideration in measurement process from being obtained in tested electric signals in electric energy deposit energy-storage travelling wave tube for instrument use, it is awkward to solve the problems, such as that existing portable electric class digital measuring instrument is not available when battery exhausts, improves the service efficiency of this kind of measuring instrumentss.
Description
Technical field
The present invention relates to a kind of from tested electric signals obtains the digital measuring instrument of electric energy, to overcome Conventional portable
Electric class digital measuring instrument cannot achieve the deficiency of its original measurement function when battery exhausts.
Background technique
It is to design and grind using Portable universal meter as the electric class measuring instrumentss of representative in electronics and technical field of electricity
Hair, production and tool indispensable in maintenance.With becoming increasingly popular for digitizing technique, these electric class measuring instrumentss are also most
Realize digitized upgrading, to measurement work bring a series of gratifying conveniences, but along with this convenience and
What is come is the embarrassment that instrument battery can not work once being finished.By taking multimeter as an example, previous pointer-type is because of its electromagnetic type
Principle can be not required to the support of instrument internal battery when measuring voltage and current, once and pointer multimeter is digitized
Upgrading then its internal battery is just again be unable to do without to the measurement of voltage and current.However due to current multimeter internal battery
Provided cruising ability is extremely limited, when measuring more frequent usually in careless there have been because of multimeter battery not
Sufficient and strike embarrassment, this brings many sorry to relevant measurement work.Therefore, although people think always for a long time
It is right and proper thing that battery, which is finished instrument and cannot work on, but still expect some day can be in this problem for heart
On there is miracle.
Current industry does not find preferable method yet to solve the problems, such as this, unique representative solution be to
Multimeter installs rechargeable battery.But the operation of replacement battery is only changed to charging behaviour when battery is finished by this scheme
Make, and charging when multimeter measurement function still in strike state.Furthermore there are also 3 points of deficiencies for this scheme: one is instrument
Table is often difficult to find the electricity network for meeting charging requirement and plug terminal in measure field, the second is instrument measurement terminal it
The outer charging terminal set brings certain burden to measurement use more, the third is charging module reduces instrument if being placed in machine
Portability, easily forget the carrying of charging accessories again if being placed in outside machine.
Summary of the invention
In order to solve to remain to have when battery exhausts to refer to the portable electric class digital measuring instrument of digital multimeter etc
Pin type electromagnetism instrument is not necessarily to battery like that and supports the ability for being just capable of measuring voltage and current, and the present invention provides a kind of solution party
Case, can be under the premise of not influencing measurement accuracy, during measuring the electric signals such as voltage or electric current from tested electric signals
Power supply energy needed for obtaining instrumentation.
The technical scheme adopted by the invention is that: in the measurement terminal of instrument and charging energy-storing circuit is accessed, by micro-control
Device processed is taken the circumstances into consideration in the measurement process of instrument from tested telecommunications according to the energy state of instrument and the energy properties of tested electric signals
It is obtained in number in electric energy deposit instrument energy-storage travelling wave tube and serves as work energy, be also capable of measuring when instrument battery is finished to realize
Demand.
Particularly, the input terminal of the charging energy-storing circuit comprising energy-storage travelling wave tube is parallel to two surveys of instrument when realization
It measures on terminal, and seals in electronic switch in the input terminal of charging energy-storing circuit, which is passed through by microcontroller in instrument
Control the presence or absence of charging current and size.
When instrument is when battery, which exhausts, to work, string is in the electronic switch of charging energy-storing circuit input end and connects
State therefrom obtains in electric energy deposit instrument energy-storage travelling wave tube, directly so that measurement terminal is automatic if touching external electric signal
To store up into electric energy rise to and be enough that instrument is supported to start to work, hereafter determined again by instrument according to the energy properties of external electric signal
It is fixed whether to continue charging energy-storing.
When instrument battery capacity is insufficient but remains to work, if instrument measurement termination contact first exists to external electric signal
Its due nominal value is measured in the state of not charging, and then gradually accompanies by ascending charging current in subsequent measurement again
The comparison of measured value and nominal value is soundd out, to find the larger charging current for not influencing measurement accuracy as with measurement operation
Charge parameter；If only minimum charge current is taken also to will affect measurement accuracy in measurement, stop charging operations in measurement.
In addition, when instrument from external electric signal when obtaining electric energy, the electricity that will will acquire under the assistance of microcontroller
It can stepwise be stored in the energy-storage travelling wave tube that multiple capacity are ascending in instrument, make instrument can be when battery is exhausted with most fast
Speed energy storage bootstrapping ground enters working condition, and can obtain electric energy storage from external electric signal as much as possible in measurement process
The standby cruising ability that instrument is improved in instrument.
It is worth noting that, to realize that above functions must carry out stringent Design of power saving to gauge internal circuit, it is best
Several grades of precision indexs for meeting actual demand can also be added to instrument, so as to user measurement when as needed in measurement accuracy
And it takes and makes preferable tradeoff between electric energy storage.
Outstanding advantages and good effect of the invention are: when instrument electricity, which is finished rear user, also thinks measurement, as long as will
The measurement terminal of instrument snaps into tested electric signals, instrument will automatic trigger tasting for electric energy is obtained from tested electric signals
Examination.If the internal resistance of tested electric signals is smaller (such as voltage source or current source), instrument will be charged rapidly with faster speed
Threshold value needed for instrumentation, and commence work without delay and realize that the measurement that user wants operates and measurement result is shown
Come.If measurement operation is also continuing, instrument will be continued to attempt to from tested electric signals with the principle for not reducing measurement accuracy
It extracts electric energy deposit instrument and thus solves portable digital instrument battery for a long time to improve the cruising ability of instrument
Exhaust the sorry and embarrassment that just can only be gone on strike.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram for the digital measuring instrument that electric energy is obtained from tested electric signals of the present invention.
1. tested electric signals, 2. charging energy-storing circuits, 3. measuring circuits, 4. microcontrollers, 5. displays.
Specific embodiment
Below in conjunction with drawings and examples, invention is further described in detail, but the present embodiment is not limited to this
Invention, it is all using similar method and its similar variation of the invention, protection scope of the present invention should all be included in.
The design of this implementation sample is divided into hardware and software two parts.
On hardware configuration, in the measurement terminal of instrument and it is connected to charging energy-storing circuit, including control charging current
Electronic switch and realize energy storage super capacitor；The electronic switch of control charging is connected in instrument on microcontroller；Instrument
The power end of interior microcontroller and other circuits is connected on the super capacitor of charging energy-storing circuit.The selection of specific component
Are as follows: microcontroller 4 is MSP430G2452, and display 5 is four section-type LCD liquid crystal display HFD-6868WP, charging storage
Can in circuit 2 energy-storage travelling wave tube be the super farad capacitor 0.22F5.5V of Gao Qipu KORCHIP DCL5R5224CF, charging storage
That electronic switch is MOSFET pipe AO3416 in energy circuit 2, and the amplifier in measuring circuit 3 is LMV931, and A/D conversion is used
Be in MSP430G2452 piece carry converter, the PB-22E80 (2P2T) of function switch switch.
In software design, the charging energy-storing after being exhausted due to instrument electricity is to touch capable telecommunications number in measurement terminal
When executed automatically by hardware, therefore how when related with charging energy-storing task mainly handles measurement in programming judges
With execution charging energy-storing.This workflow is: firstly, the electronic switch of charge closing control；Before not influenced by charging
Put the nominal value for measuring measured signal；Then, then in subsequent measurement gradually accompany by ascending charging current and sound out survey
The comparison of magnitude and nominal value, to find the larger charging current for not influencing measurement accuracy as the charging with measurement operation
Parameter；If only minimum charge current is taken also to will affect measurement accuracy in measurement, stop charging operations in measurement.Thus may be used
Realize the charging energy-storing met under measurement accuracy.
Implement the operational effect of sample are as follows: under the premise of super capacitor both end voltage value is zero built in instrument, with direct current
Regulated power supply DF1720SL1A exports 4.26V as measurement object, and the energy storage bootstrapping time of instrument is 18 seconds, is then added with measurement
The mode of charging has worked 30 seconds, disconnect at this time instrument after the measurement object can also work on 2 points 20 seconds.
Claims (3)
1. a kind of digital measuring instrument for obtaining electric energy from tested electric signals, it is characterised in that: on the measurement circuit of instrument simultaneously
It is connected to charging energy-storing circuit, the input current control terminal of the charging energy-storing circuit is connected in instrument on microcontroller, instrument
The power end of interior microcontroller and other circuits is connected on the energy-storage travelling wave tube of the charging energy-storing circuit, when instrument battery
Not enough power supply but when remaining to work, first measures the due nominal value of the electric signal, then again rear in the state of not charging
The comparison that ascending charging current sounds out measured value and nominal value is gradually accompanied by continuous measurement, does not influence to measure to find
The larger charging current of precision is as the charge parameter with measurement operation.
2. a kind of digital measuring instrument for obtaining electric energy from tested electric signals according to claim 1, it is characterised in that:
When instrument is when battery, which exhausts, to work, if occurring any electric signal from outside on instrument measurement circuit, automatically
From being obtained in the external electric signal in electric energy deposit instrument energy-storage travelling wave tube, until store up into electric energy rise to and be enough that instrument is supported to open
Beginning work.
3. a kind of digital measuring instrument for obtaining electric energy from tested electric signals according to claim 1, it is characterised in that:
When obtaining electric energy from available external electric signal, the electric energy that will acquire under the assistance of microcontroller is stepwise stored in instrument
In instrument in the ascending energy-storage travelling wave tube of multiple capacity, make instrument that can boot ground when battery is exhausted with prestissimo energy storage
Into working condition, and electric energy storage can be obtained from external electric signal as much as possible in measurement process and mentioned in instrument
The cruising ability of high instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191518.2A CN104882918B (en) | 2015-04-22 | 2015-04-22 | A kind of digital measuring instrument obtaining electric energy from tested electric signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191518.2A CN104882918B (en) | 2015-04-22 | 2015-04-22 | A kind of digital measuring instrument obtaining electric energy from tested electric signals |
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| Publication Number | Publication Date |
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| CN104882918A CN104882918A (en) | 2015-09-02 |
| CN104882918B true CN104882918B (en) | 2019-04-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020204727A1 (en) * | 2019-04-04 | 2020-10-08 | Hark Technologies As | A power adaption circuit |
| CN113848386A (en) * | 2021-10-14 | 2021-12-28 | 中国南方电网有限责任公司超高压输电公司广州局 | Voltammeter and voltammeter control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2400913Y (en) * | 1999-11-30 | 2000-10-11 | 王宏伟 | Chargeable accumulator suitable for multimeter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI226442B (en) * | 2003-09-30 | 2005-01-11 | Escort Instr Corp | Electronic apparatus recharged via signal I/O terminals |
| CN201464600U (en) * | 2009-06-04 | 2010-05-12 | 北京恒源利通电力技术有限公司 | Self-powered power failure indicator |
| JP2012039749A (en) * | 2010-08-06 | 2012-02-23 | Auto Network Gijutsu Kenkyusho:Kk | Power feeding cable device for vehicle |
| CN202522684U (en) * | 2011-12-06 | 2012-11-07 | 哈尔滨智木科技有限公司 | Device for realizing new method of representing battery |
| CN203504212U (en) * | 2013-08-26 | 2014-03-26 | 国家电网公司 | New energy electric socket with energy storage function |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2400913Y (en) * | 1999-11-30 | 2000-10-11 | 王宏伟 | Chargeable accumulator suitable for multimeter |
Non-Patent Citations (1)
| Title |
|---|
| 0_5s级三相多功能电能表的原理_设计与实现;王小方;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》;20120315(第2期);C042-798页 |
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| CN104882918A (en) | 2015-09-02 |
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