CN106772182A - A kind of digital multimeter automatic gauge calibration system - Google Patents
A kind of digital multimeter automatic gauge calibration system Download PDFInfo
- Publication number
- CN106772182A CN106772182A CN201611218469.8A CN201611218469A CN106772182A CN 106772182 A CN106772182 A CN 106772182A CN 201611218469 A CN201611218469 A CN 201611218469A CN 106772182 A CN106772182 A CN 106772182A
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- China
- Prior art keywords
- digital
- calibration
- table adapter
- digital versatile
- automatic gauge
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- 238000004891 communication Methods 0.000 abstract description 16
- 238000005259 measurement Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
Abstract
The present invention relates to the technical field of digital multimeter calibration, more particularly, to a kind of digital multimeter automatic gauge calibration system.A kind of digital multimeter automatic gauge calibration system, wherein, including computer control system, OA systems, digital versatile table adapter, calibration source and several digital multimeters；Described computer control system connects OA systems, and computer control system is connected with digital versatile table adapter；Described digital versatile table adapter connection calibration source, and digital versatile table adapter connects several digital multimeters.Calibration source of the present invention is gathered in the present invention with the USB communications of the digital multimeter being calibrated, and a USB communication interface is only needed with computer communication；Calibration source can carry five digital multimeters using the present invention, can improve measurement and calibration efficiency, meet a large amount of production figures multimeter metering requirements.
Description
Technical field
The present invention relates to the technical field of digital multimeter calibration, counted automatically more particularly, to a kind of digital multimeter
Amount calibration system.
Background technology
Digital multimeter automated calibration system is that computer software controls calibration source and is calibrated by USB communication modes
Digital multimeter（Program-controlled digital multimeter）, after computer controls calibration source output signal, to being calibrated digital multimeter
It is acquired survey data；Whether the data that automated calibration system is gathered to digital multimeter accord with the contrast of measurement and calibration achievement data
Total figureofmerit, and data are filled up in measurement and calibration record, does not meet the data markers of index out and points out, last defeated
Go out to record Calibration Report, reach auto-calibration purpose.
Current digital multimeter automated calibration system is to control a calibration source and by school by computer software control system
Accurate digital multimeter, because calibration source only has signal source all the way to export, the digital multimeter being calibrated can only measurement and calibration one
Platform equipment, calibration source and the digital multimeter being calibrated are connected in computer by USB communication modes, in computer from
Calibration signal of the dynamic calibration software needed for by instructing control calibration source output and the gear range of test needed for digital multimeter,
The survey data that now auto-calibration software passes through instruction request digital multimeter, and test data recorded calibration test record
In.
Current automated calibration system is only capable of one digital multimeter of measurement and calibration, for the digital multimeter produced in enormous quantities
Measurement and calibration efficiency it is low, calibration source equipment investment is more, manually puts into also than larger, could not meet efficient Production requirement.
The content of the invention
The present invention is to overcome at least one defect described in above-mentioned prior art, there is provided a kind of digital multimeter automatic gauge
Calibration system, can carry many digital multimeters carries out automatic calibrating and measuring, improves measurement and calibration efficiency, can meet batch production
Digital multimeter demand.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of digital multimeter automatic gauge calibration
System, wherein, including computer control system, OA systems, digital versatile table adapter, calibration source and several digital versatiles
Table；Described computer control system connects OA systems, and computer control system is connected with digital versatile table adapter；
Described digital versatile table adapter connection calibration source, and digital versatile table adapter connects several digital versatiles
Table.
Specifically, the quantity of described digital multimeter is up to 5.Described computer control system and digital versatile
Table adapter is connected by USB interface.Described digital versatile table adapter is connected with calibration source by USB interface；Numeral is more
It is connected by USB interface with several digital multimeters with table adapter.
In the present invention, this calibration system contains digital versatile table adapter, and adapter uses Single-chip Controlling switching circuit
Calibration source signal all the way is divided into five tunnels calibration source signal, equipment can bear calibration source input 1000V direct currents or ac high-voltage,
The electric current of 10A, and signal integrity is kept, calibration source signal is believed in microvolt step voltage, microampere order electric current, resistance or electric capacity etc.
Number can meet measurement verification requirement；Environment temperature can be provided to automated calibration system and alarm prompt sound.
Specifically, this system includes a computer, computer software, calibration source, adapter and test cable, computer
Calibration certificate is generated after completing automatic gauge calibration, and calibration certificate is shared to OA systems by network, five number of units can be met
Word multimeter automatic gauge is calibrated, and provides measurement and calibration certificate in real time.Further, system includes a adapter, adaptation
Device can access the calibration source and five or less than five digital multimeters of USB communications.Digital multimeter automatic gauge calibration system
The not suspension adapter switching signal source influence of the metering report of generation.
Further, digital versatile table adapter includes control circuit, communicating circuit, warning circuit and temperature acquisition electricity
Road, the control circuit includes：1000V ac/dc voltage control circuits, the calibration source for controlling up to 1000V voltages
Signal break-make；35mV ac/dc voltage control circuits, calibration source signal and resistance for controlling to be smaller than 35mV voltages
Capacitance signal break-make；10A ac/dc current control circuits, the calibration source signal break-make for controlling up to 10A electric currents；350
μ A ac/dc current control circuits, for controlling the calibration source signal break-make less than 350 μ A electric currents.
Communicating circuit turns serial port circuit and realizes communication, warning circuit and temperature using the USB Hub and USB of prior art
Acquisition Circuit is also using existing buzzer phonation circuit and existing environment temperature sensor circuit.
Compared with prior art, beneficial effect is：The USB correspondence trays of calibration source of the present invention and the digital multimeter being calibrated
Close in the present invention, a USB communication interface is only needed with computer communication；It is many that calibration source can carry five number of units words using the present invention
With table, measurement and calibration efficiency can be improved, meet a large amount of production figures multimeter metering requirements.
Brief description of the drawings
Fig. 1 is overall schematic of the present invention.
Fig. 2 is present invention control circuit diagram.
Fig. 3 is digital versatile table adapter communication scheme schematic diagram of the present invention.
Specific embodiment
Accompanying drawing being for illustration only property explanation, it is impossible to be interpreted as the limitation to this patent；It is attached in order to more preferably illustrate the present embodiment
Scheme some parts to have omission, zoom in or out, do not represent the size of actual product；To those skilled in the art,
Some known features and its explanation may be omitted and will be understood by accompanying drawing.Being for illustration only property of position relationship described in accompanying drawing
Explanation, it is impossible to be interpreted as the limitation to this patent.
As shown in figure 1, a kind of digital multimeter automatic gauge calibration system, wherein, including computer control system, OA systems
System, digital versatile table adapter, calibration source and several digital multimeters；Described computer control system connection OA systems
Unite, and computer control system is connected with digital versatile table adapter；
Described digital versatile table adapter connection calibration source, and digital versatile table adapter connects several digital versatiles
Table.
Specifically, the quantity of described digital multimeter is up to 5.Described computer control system and digital versatile
Table adapter is connected by USB interface.Described digital versatile table adapter is connected with calibration source by USB interface；Numeral is more
It is connected by USB interface with several digital multimeters with table adapter.
In the present invention, this calibration system contains digital versatile table adapter, and adapter uses Single-chip Controlling switching circuit
Calibration source signal all the way is divided into five tunnels calibration source signal, equipment can bear calibration source input 1000V direct currents or ac high-voltage,
The electric current of 10A, and signal integrity is kept, calibration source signal is believed in microvolt step voltage, microampere order electric current, resistance or electric capacity etc.
Number can meet measurement verification requirement；Environment temperature can be provided to automated calibration system and alarm prompt sound.
Specifically, this system includes a computer, computer software, calibration source, adapter and test cable, computer
Calibration certificate is generated after completing automatic gauge calibration, and calibration certificate is shared to OA systems by network, five number of units can be met
Word multimeter automatic gauge is calibrated, and provides measurement and calibration certificate in real time.Further, system includes a adapter, adaptation
Device can access the calibration source and five or less than five digital multimeters of USB communications.Digital multimeter automatic gauge calibration system
The not suspension adapter switching signal source influence of the metering report of generation.
Further, digital versatile table adapter includes control circuit, communicating circuit, warning circuit and temperature acquisition electricity
Road, the control circuit includes：1000V ac/dc voltage control circuits, the calibration source for controlling up to 1000V voltages
Signal break-make；35mV ac/dc voltage control circuits, calibration source signal and resistance for controlling to be smaller than 35mV voltages
Capacitance signal break-make；10A ac/dc current control circuits, the calibration source signal break-make for controlling up to 10A electric currents；350
μ A ac/dc current control circuits, for controlling the calibration source signal break-make less than 350 μ A electric currents.
Communicating circuit turns serial port circuit and realizes communication, warning circuit and temperature using the USB Hub and USB of prior art
Acquisition Circuit is also using existing buzzer phonation circuit and existing environment temperature sensor circuit.
As shown in Fig. 2（STD_A）For that can lead to 10A high current signal control circuits, (STD_mA) is by the letter less than 1A
Number control circuit,（STD_V/STD_COM）It is the signal control circuits such as controllable big voltage, small voltage, resistance and electric capacity,
(STD_Ma/ STD_ACOM) combination is control four-wire ohm signal circuit.
Voltage principle is controlled：Be designed to can independent control each relay mode, it is full when control voltage signal
Portion's Control closure disconnects, and is to need the group relay of independent control two when control resistance signal.Electric current principle control
System：It is that circuit current relay is all closed or disconnected when control electric current signal.
In the present invention, 1 to 5 digital multimeter signal source may be selected.
During the signal of calibration source accesses digital multimeter again by digital versatile table adapter, alternating current is kept
The integrality of the signals such as pressure, DC voltage, alternating current, DC current, resistance, electric capacity, low pass filter, conductance, temperature.
Need to solve to keep signal integrity scheme in the present invention, it is to avoid signal causes decay by equipment：Control circuit
In relay type selecting：For the control electric current of current signal 10A, need to select that the relay of many 10A electric currents, signal attenuation can be led to
It is small, and relay wants antisurge；Sensitivity and the small relay of deamplification influence are then selected for low current signal；For electricity
Pressing the signal demand selection of 1000V can bear the relay of this signal, and have preferable insulating properties；High-voltage relay on the market
Device technique can produce influence to faint voltage, all to need selection sensitivity preferable in the voltage signal by below 100V
Relay.
The Signal Integrity Design of PCB circuits：Relay layout and PCB layout design in control circuit are of the invention
To an important step of Signal Integrity Design, the circuit design line width for high current 10A is greater than and can bear 20A electric currents
Circuit above, other circuits will evade survey holding wire, in order to avoid cause parasitic signal；For the signal line of big voltage 1000V
Line-spacing will can bear the voltage of more than 3000V, and holding wire will also evade other circuit-lines, in order to avoid cause spark phenomenon and parasitism
Signal.
Faint signal attenuation or increase is caused by digital versatile table adapter, line number is entered by computer software
According to amendment, it is ensured that the correctness of metering signal.As in Fig. 3, it is shown that digital versatile table adapter communication scheme.
In the present embodiment, can access five program-controlled digital multimeters carries out measurement and calibration calibrating, computer production meter
Amount calibration certificate simultaneously passes through network share to OA systems, improves measurement and calibration efficiency.The communication scheme of digital versatile table adapter：
To in adapter, adapter passes through a usb communication line again for the USB communication interfaces set of i.e. five digital multimeters and calibration source
It is connected in computer.The circuit control schemes of digital versatile table adapter：For big voltage 1000V, below small voltage 10V, big
Circuit 10A, below low current 100mA, are respectively adopted the integrality that different Control schemes ensure signal.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not right
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no need and unable to be exhaustive to all of implementation method.It is all this
Any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (6)
1. a kind of digital multimeter automatic gauge calibration system, it is characterised in that including computer control system, OA systems, number
The multiplex table adapter of word, calibration source and several digital multimeters；Described computer control system connection OA systems, and
Computer control system is connected with digital versatile table adapter；
Described digital versatile table adapter connection calibration source, and digital versatile table adapter connects several digital versatiles
Table.
2. a kind of digital multimeter automatic gauge calibration system according to claim 1, it is characterised in that：Described numeral
The quantity of multimeter is up to 5.
3. a kind of digital multimeter automatic gauge calibration system according to claim 1, it is characterised in that：Described calculating
Machine control system is connected with digital versatile table adapter by USB interface.
4. a kind of digital multimeter automatic gauge calibration system according to claim 1, it is characterised in that：Described numeral
Multiplex table adapter is connected with calibration source by USB interface；Digital versatile table adapter passes through USB with several digital multimeters
Interface is connected.
5. according to a kind of any described digital multimeter automatic gauge calibration system of Claims 1-4, it is characterised in that：Institute
The digital versatile table adapter stated can bear calibration source input 1000V direct currents or ac high-voltage, the electric current of 10A.
6. according to a kind of any described digital multimeter automatic gauge calibration system of Claims 1-4, it is characterised in that：Institute
The digital versatile table adapter stated includes control circuit, communicating circuit, warning circuit and temperature collection circuit, and foregoing circuit is equal
Link together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611218469.8A CN106772182A (en) | 2016-12-26 | 2016-12-26 | A kind of digital multimeter automatic gauge calibration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611218469.8A CN106772182A (en) | 2016-12-26 | 2016-12-26 | A kind of digital multimeter automatic gauge calibration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106772182A true CN106772182A (en) | 2017-05-31 |
Family
ID=58926841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611218469.8A Pending CN106772182A (en) | 2016-12-26 | 2016-12-26 | A kind of digital multimeter automatic gauge calibration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106772182A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798841A (en) * | 2020-12-29 | 2021-05-14 | 北京无线电计量测试研究所 | Full-automatic measuring device and method for digital multimeter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628749U (en) * | 1992-09-18 | 1994-04-15 | 株式会社アドバンテスト | Multimeter |
| CN103744045A (en) * | 2013-12-17 | 2014-04-23 | 中国电子科技集团公司第二十研究所 | Digital type universal meter automatic calibration system |
| CN104391263A (en) * | 2014-10-09 | 2015-03-04 | 中国船舶重工集团公司第七0九研究所 | Onsite calibrating apparatus of circuit board fault diagnosis automatic test system |
| CN204945356U (en) * | 2015-09-14 | 2016-01-06 | 江西洪都航空工业集团有限责任公司 | A kind of Calibration for Special Testing Equipment platform |
| CN105548929A (en) * | 2015-12-02 | 2016-05-04 | 中国人民解放军济南军区72465部队 | System and method of automatic measurement of digital multimeter |
| CN205404784U (en) * | 2016-03-30 | 2016-07-27 | 衢州巨化检测中心 | Digital multimeter measurement calibration device |
| CN206421018U (en) * | 2016-12-26 | 2017-08-18 | 广州山锋测控技术有限公司 | A kind of digital multimeter automatic gauge calibration system |
-
2016
- 2016-12-26 CN CN201611218469.8A patent/CN106772182A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628749U (en) * | 1992-09-18 | 1994-04-15 | 株式会社アドバンテスト | Multimeter |
| CN103744045A (en) * | 2013-12-17 | 2014-04-23 | 中国电子科技集团公司第二十研究所 | Digital type universal meter automatic calibration system |
| CN104391263A (en) * | 2014-10-09 | 2015-03-04 | 中国船舶重工集团公司第七0九研究所 | Onsite calibrating apparatus of circuit board fault diagnosis automatic test system |
| CN204945356U (en) * | 2015-09-14 | 2016-01-06 | 江西洪都航空工业集团有限责任公司 | A kind of Calibration for Special Testing Equipment platform |
| CN105548929A (en) * | 2015-12-02 | 2016-05-04 | 中国人民解放军济南军区72465部队 | System and method of automatic measurement of digital multimeter |
| CN205404784U (en) * | 2016-03-30 | 2016-07-27 | 衢州巨化检测中心 | Digital multimeter measurement calibration device |
| CN206421018U (en) * | 2016-12-26 | 2017-08-18 | 广州山锋测控技术有限公司 | A kind of digital multimeter automatic gauge calibration system |
Non-Patent Citations (1)
| Title |
|---|
| 孙德冲 等: "数字多用表的组态校准平台设计", 《中国计量》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798841A (en) * | 2020-12-29 | 2021-05-14 | 北京无线电计量测试研究所 | Full-automatic measuring device and method for digital multimeter |
| CN112798841B (en) * | 2020-12-29 | 2023-11-14 | 北京无线电计量测试研究所 | Full-automatic measuring device and method for digital multimeter |
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Application publication date: 20170531 |
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