CN106405188A - Automatic measuring range switching system and method for current measuring device - Google Patents
Automatic measuring range switching system and method for current measuring device Download PDFInfo
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- CN106405188A CN106405188A CN201610879478.5A CN201610879478A CN106405188A CN 106405188 A CN106405188 A CN 106405188A CN 201610879478 A CN201610879478 A CN 201610879478A CN 106405188 A CN106405188 A CN 106405188A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 201000004569 Blindness Diseases 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 241000256844 Apis mellifera Species 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000010338 mechanical breakdown Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/08—Circuits for altering the measuring range
- G01R15/09—Autoranging circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention provides an automatic measuring range switching system and method for current measuring device. With host computer software, it is possible to realize the measuring range automatic switching of current, which overcomes the blindness and uncertainty of manual operation to change the gears of a detection instrument, raises the efficiency and accuracy, reduces the cost and ensures the security. The system comprises a current measuring device for converting the to-be-detected current and outputting it as analog voltage through a measuring range switching circuit; a wireless transmission module sub-node for converting the analog voltage into digital quantity; a wireless transmission module main node for transmitting the digital quantity to the host computer software; and the host computer software for measuring range automatic switching and outputting and displaying.
Description
Technical field
The present invention relates to field of electric measurement, and more particularly, to a kind of automatic range switching of current measuring device
System and method.
Background technology
Along with the mushroom development of China's UHV Transmission Engineering, the electromagnetic environment problem of transmission line of electricity periphery increasingly causes
People pay attention to.Transmission line of electricity due to the voltage constant on every polar curve road, therefore by wire to the Electric Field Distribution between greatly not with
Time change, the space charge that conductive line surfaces produce because of corona is in the presence of electric field line by conductive line surfaces earthward direction fortune
Dynamic, form ion current.
The ion stream producing under extra high voltage line is measured, should ensure that the certainty of measurement of signal takes into account letter again
Number measurement range, technically have certain difficulty.
Traditional measuring method to carry out range switching and wired signal transmission using Manual mechanical button mostly.
Manual switching can cause wide range and small-range certainty of measurement can not take into account simultaneously, cannot realize automatically accurately surveying
Amount；And the existing blindness of manual switching is again inaccurate, but also to continually switching range switch, the time one long, easily makes
Become the mechanical breakdown of switching switch.
What wired signal transmission was brought first is wiring issue, once there being multiple stage measuring apparatus, then when carrying out signal
It is necessary to frequently carry out plugging joint when storage, needs are attached with computer, cause the abrasion of joint；Secondly when measurement
Live ratio is relatively hazardous, and such as extra-high voltage direct-current transmission environment is just not suitable for tester's close contact, method at this moment is exactly
Lengthen the length of signal transmssion line, increased cost, and the distortion of signal can be caused.
And the method for other current automatic range switchings, their common feature is that circuit is mainly passed through in range switching
Realize, for example, using the comparison circuit in hardware device, range is switched over, such as amplifying circuit is switched by controller
Feedback resistance, although do so achieves the automatic switchover of range, hardware cost is higher.
Content of the invention
In order to solve the above problems, the design of the present invention, will be with using the range swithching circuit of two different switching degree
One electric current to be measured carries out the different switching based on range, and carries out automatic decision and switching using upper computer software, realize from
Dynamic handover measurement, and ensure that each range accuracy class is consistent and the saving of measurement cost.Meanwhile, using the side of being wirelessly transferred
The measurement that formula is live avoids the abrasion of loaded down with trivial details wiring and joint.
According to an aspect of the invention, it is provided a kind of automatic range switching system of current measuring device, including：
Current measuring device, for being converted to voltage by the electric current to be measured of input；
First range swithching circuit and the second range swithching circuit, for being wireless transport module by described voltage conversion
Node can the first analog voltage in range of receiving and the second analog voltage；
Wireless transport module child node, for by the first analog voltage and the second analog voltage be converted to the first digital quantity and
Second digital quantity, and described first digital quantity and the second digital quantity are sent to wireless transport module host node；
Wireless transport module host node, for being sent to upper computer software by described first digital quantity and the second digital quantity；
And
Upper computer software, for carrying out the automatic switchover of range, exports and shows the result of described automatic switchover；
Wherein, the automatically switching to of described range：Whether upper computer software judges the value of the first digital quantity in first threshold
In the range of, if so, then the value of the first digital quantity is converted to output current value；Otherwise the value of the second digital quantity is converted to output
Current value.
Preferably, the scope of described first threshold is 0 to 1024.
Preferably, the voltage range of described first range swithching circuit is less than the voltage range of the second range swithching circuit.
Preferably, the outfan of described first range swithching circuit and the second range swithching circuit is respectively connecting to wirelessly pass
Two A/D inputs of defeated module child node.
Preferably, described wireless transport module child node carries out channel radio by antenna and wireless transport module host node
News.
Preferably, described wireless transport module host node is connected with upper computer software by USB interface and is communicated.
Preferably, described wireless transport module host node can be communicated with multiple wireless transport module child nodes simultaneously.
According to a further aspect in the invention, a kind of automatic range switching method of current measuring device is provided, including：
Current measuring device accesses electric current to be measured and electric current to be measured is converted to voltage；
It is that described voltage is passed through the first range swithching circuit and the second range swithching circuit conversion by current measuring device
One analog voltage and the second analog voltage；
First analog voltage and the second analog voltage are converted to the first digital quantity and second by wireless transport module child node
Digital quantity, and it is sent to wireless transport module host node；
First digital quantity and the second digital quantity are sent to upper computer software by wireless transport module host node；And
Upper computer software carries out the automatic switchover of range, and the result of described automatic switchover is exported and shows.
Preferably, the automatic switching method of described range is：
Whether the value judging the first digital quantity is in the range of first threshold；If so, then the value of the first digital quantity is carried out turning
It is changed to output current value；Otherwise the value of the second digital quantity is converted to output current value.
Preferably, the scope of described first threshold is 0 to 1024.
Brief description
By reference to the following drawings, the illustrative embodiments of the present invention can be more fully understood by：
Fig. 1 is the system structure of the automatic range switching system of the current measuring device according to the preferred embodiment of the present invention
Figure；
Fig. 2 is the method flow of the automatic range switching method of the current measuring device according to the preferred embodiment of the present invention
Figure；And
Fig. 3 is the method flow diagram of the automatic switching method of the range according to the preferred embodiment of the present invention.
Specific embodiment
With reference now to accompanying drawing, introduce the illustrative embodiments of the present invention, however, the present invention can be with many different shapes
Formula is implementing, and is not limited to embodiment described herein, provides these embodiments to be at large and fully disclose
The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.For showing of being illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon is remembered.
Unless otherwise stated, term (inclusion scientific and technical terminology) used herein has to person of ordinary skill in the field
Common understand implication.Further it will be understood that the term being limited with the dictionary that is usually used is it should be understood to and it
The linguistic context of association area has consistent implication, and is not construed as Utopian or excessively formal meaning.
Fig. 1 is the system structure of the automatic range switching system of the current measuring device according to the preferred embodiment of the present invention
Figure.As shown in figure 1, described automatic range switching system by current measuring device 1, wireless transport module child node 2, be wirelessly transferred
Module host node 3 and upper computer software 4 form.When carrying out automatic range switching, electric current to be measured is input to current measurement
In device 1, the electric current to be measured inputting is converted to voltage by current measuring device 1, and the voltage obtaining is turned by the first range
Change circuit and obtain the first analog voltage A1, meanwhile, the voltage obtaining is obtained the second simulation electricity by the second range swithching circuit
Pressure A2, and the first analog voltage A1 and the second analog voltage A2 is sent to wireless transport module child node 2, wireless transport module
The two-way receiving analog voltage is converted into corresponding digital quantity and is sent to wireless transport module host node 3 by child node 2, wirelessly
The two-way receiving digital quantity is uploaded to upper computer software 4 by transport module host node 3 to carry out the automatic conversion of range and shows
Output.
The electric current to be measured inputting is converted to corresponding voltage and is exported it is preferable that extra-high by described current measuring device 1
, between ± 100nA, after I-V conversion, output voltage is between ± 3V for ion stream scope under pressure power transmission line.
Preferably, heretofore described wireless transport module child node 2 and the nothing of wireless transport module host node 3 application
Line host-host protocol is purple honeybee Zigbee protocol, in actual applications, described wireless transport module child node 2 and wireless transport module
The wireless protocols of host node 3 application can also enable the wireless transmission protocol of function of the present invention for other.
The Zigbee module child node being application in ± 0.5V, and the present invention due to the size separation of automatic range switching
The input range of the analog voltage requiring is 0～3V, therefore the voltage after I-V changes is linked into ± 0.5V and turns 0～3V's
First range swithching circuit, the first analog voltage after changing is A1, the voltage after I-V changes is linked into ± 3V simultaneously
Turn the second range swithching circuit of 0～3V, the second analog voltage after changing is A2, and by the first range swithching circuit and second
The output of range swithching circuit is respectively connected to the AD input of wireless transport module child node.
Preferably, described wireless transport module child node is arranged on current measuring device 1, and is carried out more by plug
Change, and the A/D sampling module of 10 is all had on each wireless transport module child node, the first range swithching circuit in the present invention
Output with the second range swithching circuit is respectively connected to AD1 input and the AD2 input of wireless transport module child node, institute
State input and connect corresponding sampling module respectively, described sampling module carries out A/D conversion to described two-way analog voltage, by two
Road analog voltage is converted to corresponding two-way digital quantity, and the scope of described two-way digital quantity is all between 0 to 1024.Wherein
First analog voltage is converted to the first digital quantity D1 for A1, and the second analog voltage A2 is converted to the second digital quantity D2.
Preferably, wireless transport module child node carries antenna, and is obtained after conversion by way of wireless telecommunications
The first digital quantity D1 and the second digital quantity D2 send to wireless transport module host node.
Preferably, described wireless transport module host node receives the first of the transmission of wireless transport module child node by antenna
Digital quantity D1 and the second digital quantity D2, and be attached with upper computer software 4 and communicate by USB interface.It will be appreciated that
When there is multiple current measuring device, each current measuring device all has a wireless transport module child node, wireless biography
Defeated module host node can identify multiple wireless transport module child nodes within the specific limits, with reach upper computer software with many
The purpose that individual measuring terminals are communicated.
Preferably, described upper computer software 4 be used for receive wireless transport module host node transmission the first digital quantity D1 and
Second digital quantity D2, and by range automatic switchover by required digital quantity be converted to output current exported and display
Interface is shown in real time.
Fig. 2 is the method flow of the automatic range switching method of the current measuring device according to the preferred embodiment of the present invention
Figure.As shown in Fig. 2 the automatic range switching method 200 of current measuring device is from the beginning of step 201.In step 201, to institute
State current measuring device and carry out calibration operation, changed with ensureing that current measuring device can carry out accurately I-V.
Preferably, in step 202., electric current to be measured is linked in current measuring device, and carries out I-V and change and export
Voltage after conversion.
Preferably, in step 203, the voltage obtaining after I-V changes is separately input to the first range swithching electricity
In road and the second range swithching circuit, obtaining the first analog voltage is that A1 and the second analog voltage are A2 and send to being wirelessly transferred
Module child node.
Preferably, in step 204, the receive first analog voltage is A1 and second by wireless transport module child node
Analog voltage is converted to the first digital quantity D1 and the second digital quantity D2 for A2, and is sent to wireless biography by way of wireless telecommunications
Defeated module host node.
Preferably, in step 205, the first digital quantity D1 and the second digital quantity D2 is passed through by wireless transport module host node
USB interface is sent to upper computer software, and upper computer software is carried out to the two-way digital quantity receiving by the automatic switchover of range
Judge and select wherein one railway digital amount to be changed, and the output current after conversion is exported and shows.
Fig. 3 is the method flow diagram of the automatic switching method of the range according to the preferred embodiment of the present invention.As shown in figure 3,
The automatic switching method 300 of range is from the beginning of step 301.Preferably, in step 301, whether judge the value of the first digital quantity
In the range of first threshold, when the value of described first digital quantity is in the range of first threshold, execution step 302, otherwise execute
Step 303.The scope of wherein said first threshold is 0-1024.
Preferably, in step 302, when the value of described first digital quantity is in the range of first threshold, by the first numeral
The value of amount carries out being converted to output current value and is exported.
Preferably, in step 303, when the value of described first digital quantity is not in the range of first threshold, by the second number
The value of word amount carries out being converted to output current value and is exported.
The present invention is described by reference to a small amount of embodiment.However, known in those skilled in the art, as
Subsidiary Patent right requirement is limited, except present invention others disclosed above embodiment equally falls the present invention's
In the range of.
Normally, all terms using in the claims are all solved in the usual implication of technical field according to them
Release, unless in addition clearly defined wherein.All of reference "/described/be somebody's turn to do [device, assembly etc.] " is all opened ground
It is construed at least one of described device, assembly etc. example, unless otherwise expressly specified.Any method disclosed herein
Step all need not be run with disclosed accurate order, unless explicitly stated otherwise.
Claims (10)
1. the automatic range switching system of a kind of current measuring device, including：
Current measuring device, for being converted to voltage by the electric current to be measured of input；
First range swithching circuit and the second range swithching circuit, for being wireless transport module child node by described voltage conversion
Can the first analog voltage in range of receiving and the second analog voltage；
Wireless transport module child node, for being converted to the first digital quantity and second by the first analog voltage and the second analog voltage
Digital quantity, and described first digital quantity and the second digital quantity are sent to wireless transport module host node；
Wireless transport module host node, for being sent to upper computer software by described first digital quantity and the second digital quantity；And
Upper computer software, for carrying out the automatic switchover of range, exports and shows the result of described automatic switchover；
Wherein, the automatically switching to of described range：Whether upper computer software judges the value of the first digital quantity in first threshold scope
Interior, if so, then the value of the first digital quantity is converted to output current value；Otherwise the value of the second digital quantity is converted to output current
Value.
2. system according to claim 1 is it is characterised in that the scope of described first threshold is 0 to 1024.
3. system according to claim 1 is it is characterised in that the voltage range of described first range swithching circuit is less than the
The voltage range of two range swithching circuit.
4. system according to claim 1 is it is characterised in that described first range swithching circuit and the second range swithching are electric
The outfan on road is respectively connecting to two A/D inputs of wireless transport module child node.
5. system according to claim 1 it is characterised in that described wireless transport module child node pass through antenna with wireless
Transport module host node communicates wirelessly.
6. system according to claim 1 it is characterised in that described wireless transport module host node pass through USB interface with
Upper computer software connects and is communicated.
7. system according to claim 5 it is characterised in that described wireless transport module host node can simultaneously with multiple
Wireless transport module child node communicates.
8. a kind of automatic range switching method of current measuring device, including：
Current measuring device accesses electric current to be measured and electric current to be measured is converted to voltage；
It is the first mould that described voltage is passed through the first range swithching circuit and the second range swithching circuit conversion by current measuring device
Intend voltage and the second analog voltage；
First analog voltage and the second analog voltage are converted to the first digital quantity and the second numeral by wireless transport module child node
Amount, and it is sent to wireless transport module host node；
First digital quantity and the second digital quantity are sent to upper computer software by wireless transport module host node；And
Upper computer software carries out the automatic switchover of range, and the result of described automatic switchover is exported and shows.
9. method according to claim 8 is it is characterised in that the automatic switching method of described range is：
Whether the value judging the first digital quantity is in the range of first threshold；If so, then the value of the first digital quantity is converted to
Output current value；Otherwise the value of the second digital quantity is converted to output current value.
10. method according to claim 9 is it is characterised in that the scope of described first threshold is 0 to 1024.
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| CN201610879478.5A CN106405188B (en) | 2016-10-08 | 2016-10-08 | Automatic range switching system and method of current measuring device |
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| CN201610879478.5A CN106405188B (en) | 2016-10-08 | 2016-10-08 | Automatic range switching system and method of current measuring device |
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Cited By (7)
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| CN108414824A (en) * | 2018-01-31 | 2018-08-17 | 浙江南都电源动力股份有限公司 | A kind of electric current detecting method and device |
| CN108931336A (en) * | 2017-05-23 | 2018-12-04 | 北京航天计量测试技术研究所 | A kind of high stability pressure control algorithm |
| CN109459697A (en) * | 2018-09-18 | 2019-03-12 | 安恒环境科技（北京）股份有限公司 | For measuring the device of electric current |
| CN110286257A (en) * | 2019-06-20 | 2019-09-27 | 西安易朴通讯技术有限公司 | Electric current detecting method and device, electronic equipment and computer readable storage medium |
| CN110673077A (en) * | 2019-09-30 | 2020-01-10 | 上海商汤智能科技有限公司 | Data processing method and device, measuring instrument, measuring platform and storage medium |
| CN112083215A (en) * | 2020-08-31 | 2020-12-15 | 中车南京浦镇车辆有限公司 | Digital quantity output device with intelligent load detection function |
| CN114659545A (en) * | 2022-04-29 | 2022-06-24 | 东风电驱动系统有限公司 | Double-range self-adaptive measurement method and device |
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| CN112083215A (en) * | 2020-08-31 | 2020-12-15 | 中车南京浦镇车辆有限公司 | Digital quantity output device with intelligent load detection function |
| CN114659545A (en) * | 2022-04-29 | 2022-06-24 | 东风电驱动系统有限公司 | Double-range self-adaptive measurement method and device |
| CN114659545B (en) * | 2022-04-29 | 2024-01-09 | 东风电驱动系统有限公司 | Double-range self-adaptive measurement method and device |
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| CN106405188B (en) | 2020-04-17 |
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