CN104597422A - Touching-type universal meter calibration instrument - Google Patents
Touching-type universal meter calibration instrument Download PDFInfo
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- CN104597422A CN104597422A CN201510013839.3A CN201510013839A CN104597422A CN 104597422 A CN104597422 A CN 104597422A CN 201510013839 A CN201510013839 A CN 201510013839A CN 104597422 A CN104597422 A CN 104597422A
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Abstract
The invention discloses a touching-type universal meter calibration instrument. The calibration instrument comprises a calibration system, wherein the calibration system comprises a multifunctional calibration source, an embedded singlechip data processing module, a touch screen control module and a power supply module; the embedded singlechip data processing module comprises an S3C2440A embedded singlechip, and a memory, a display module, a touch screen control module, a voltage data acquisition module, a voltage range switching control module, a current data acquisition module, a current range switching control module, a resistance data acquisition module and a resistance range switching control module connected with the embedded singlechip. The calibration instrument has the advantages of few physical switches, overall information display, high-voltage output alarm prompt, low current, high resolution ratio, safety, reliability and low power.
Description
Technical field
The invention belongs to electronic instrumentation, be specifically related to a kind of touch multimeter tester.
Background technology
Traditional Multimeter Calibration device mainly outputs signal multimeter by calibration source, and by pointer instrument or numeral method, this calibrating installation exists following shortcoming:
1., when high voltage detects, generation current is excessive;
2. physical switch is too much, complicated operation;
3. show information single;
4. the gear switch of voltage/current mistake lacks judgement and defencive function.
Summary of the invention
Object of the present invention solves the problems of the technologies described above, provide that a kind of physical switch is few, information displaying comprehensively, High voltage output alarm and the touch multimeter tester that electric current is little, resolution is high, safe and reliable, power is little.
For realizing above-mentioned object, technical scheme of the present invention is:
A kind of touch multimeter tester, comprise check system, described check system comprises multi-functional calibration source, embedded scm data processing module, touch screen control module and power module, described embedded scm data processing module comprises S3C2440A embedded scm, and the storer to be connected with this embedded scm, display module, touch screen control module, voltage data acquisition module, voltage range switches control module, current data acquisition module, current range switches control module, resistance data acquisition module and resistance range switch control module, described multi-functional calibration source comprises the AC/DC voltage output module exporting calibration voltage to table to be verified, the DC current output module of calibration current is exported to table to be verified, the resistance output module of calibrated resistance is exported to table to be verified, described AC/DC voltage output module respectively with voltage data acquisition module, voltage range switches control module and connects, described DC current output module respectively with current data acquisition module, current range switches control module and connects, described resistance output module respectively with resistance data acquisition module, resistance range switches control module and connects, described power module is connected with S3C2440A embedded scm, AC/DC voltage output module, DC current output module and resistance output module respectively.
The above touch screen control module comprises capacitive touch screen and touching signals is converted to digital signal data processing module.
The above display module comprises display screen and display screen driver module.
The above display screen is TFT colour liquid crystal display device.
The above voltage data acquisition module, current data acquisition module and resistance data acquisition module all adopt 12 AD conversion module.
The above AC/DC voltage output module adopts the adjustable DC-DC boost module of PWM, and described DC current output module adopts constant pressure and flow module, and described resistance output module adopts precision resister, the resistance combination that error is less than 1%.
The above storer is K4S561632N storer.
The present invention's multi-functional calibration source voltage exports and adopts PWM(pulse-width adjustment) adjustable DC-DC boost module exports the calibration voltage that wide region regulates, output HIGH voltage low current to being calibrated multimeter.When detecting multimeter voltage/current gear, judge gear setting whether correct and wrong gear defencive function.
The present invention adopts the embedded S3C2440AL single-chip microcomputer of Samsung as micro controller core, man-machine interaction input adopts with the dummy keyboard of capacitive touch screen display, comprises icon, acknowledgement key, cancel key, ten key, increase key, reduces key, reset key.Man-machine interaction exports TFT colour liquid crystal display device, show magnitude of voltage, current value, word and graphical interfaces respectively, comprise display AC/DC voltage, AC/DC electric current and resistance value, specifications and models, numbering, date, be calibrated AC/DC voltage gear that multimeter should look after and guide, be calibrated AC/DC electric current gear that multimeter should look after and guide, be calibrated resistance gear that multimeter should look after and guide, high voltage output screen display Warning Sign and alarm sound prompting.The output switching of the voltage of multi-functional calibration source, electric current and resistance is controlled by the icon of dummy keyboard; By increasing key, reducing the voltage in key and the numerical key control accurate source of Multifunctional school, electric current and resistance value output.Resetted by reset key and export zero value.
Compared with prior art, beneficial effect of the present invention is: with S3C2440A embedded scm module for control core designs, based on μ COSII Design of Embedded Operating System program, adopt the operation of all touch screen control mode, without physical button and switch, TFT large screen color liquid crystal displaying information on screen enriches, High voltage output alarm and electric current is little, resolution is high, and operation interface is friendly simple.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram of inventive touch formula multimeter tester;
Fig. 2 is the DC voltage data acquisition module circuit diagram of inventive touch formula multimeter tester;
Fig. 3 is that the DC voltage range of inventive touch formula multimeter tester switches control module circuit diagram;
Fig. 4 is the alternating voltage data acquisition module circuit diagram of inventive touch formula multimeter tester;
Fig. 5 is that the alternating voltage range of inventive touch formula multimeter tester switches control module circuit diagram;
Fig. 6 is the current data acquisition module circuit diagram of inventive touch formula multimeter tester;
Fig. 7 is that the current range of inventive touch formula multimeter tester switches control module circuit diagram;
Fig. 8 is the resistance data acquisition module circuit diagram of inventive touch formula multimeter tester;
Fig. 9 is that the resistance range of inventive touch formula multimeter tester switches control module circuit diagram;
Figure 10 is the power module circuitry figure of inventive touch formula multimeter tester;
Figure 11 is the embedded scm data processing module circuit diagram of inventive touch formula multimeter tester;
Figure 12 is the touch screen control module circuit diagram of inventive touch formula multimeter tester;
Figure 13 is the display screen driver module circuit diagram of inventive touch formula multimeter tester.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to the scope that embodiment represents.
Embodiment 1:
As shown in Figure 1, a kind of touch multimeter tester, comprise check system, check system comprises multi-functional calibration source, embedded scm data processing module, touch screen control module and power module, embedded scm data processing module comprises S3C2440A embedded scm, and the storer to be connected with this embedded scm, display module, touch screen control module, voltage data acquisition module, voltage range switches control module, current data acquisition module, current range switches control module, resistance data acquisition module and resistance range switch control module, multi-functional calibration source comprises to the AC/DC voltage output module of table output calibration voltage to be verified, to the DC current output module of table output calibration current to be verified, to the resistance output module showing to export calibrated resistance to be verified, AC/DC voltage output module switches control module with voltage data acquisition module, voltage range respectively and is connected, DC current output module switches control module with current data acquisition module, current range respectively and is connected, and resistance output module switches control module with resistance data acquisition module, resistance range respectively and is connected, power module is connected with S3C2440A embedded scm, AC/DC voltage output module, DC current output module and resistance output module respectively.Touch screen control module comprises capacitive touch screen and touching signals is converted to digital signal data processing module.Display module comprises display screen and display screen driver module.Display screen is TFT colour liquid crystal display device.Voltage data acquisition module, current data acquisition module and resistance data acquisition module all adopt 12 AD conversion module.AC/DC voltage output module adopts the adjustable DC-DC boost module of PWM, and DC current output module adopts constant pressure and flow module, and resistance output module adopts precision resister, the resistance combination that error is less than 1%.
Operation steps:
One, DC voltage verification
1, DC voltage calibration selected by screen, enters DC voltage Calibration interface;
2, on screen, dummy keyboard input arranges the magnitude of voltage (when magnitude of voltage is more than 100V, prompting that screen has that Keep Clear-High Voltage) needing to export, by acknowledgement key after completing;
3, multimeter to be verified (MF-47 type multimeter) table rod is pressed the output terminal of this tester of positive-negative polarity correspondence access, debug according to the corresponding multimeter reading to be verified of output voltage values.
Two, alternating voltage verification
1, alternating voltage calibration selected by screen, enters alternating voltage Calibration interface;
2, on screen, dummy keyboard input arranges the magnitude of voltage (when magnitude of voltage is more than 100V, prompting that screen has that Keep Clear-High Voltage) needing to export, by acknowledgement key after completing;
3, multimeter to be verified (MF-47 type multimeter) table rod is pressed the output terminal of this tester of positive-negative polarity correspondence access, debug according to the corresponding multimeter reading to be verified of output voltage values.
Three, DC current verification
1, correcting current selected by screen, enters correcting current interface;
2, on screen, dummy keyboard input arranges the electric current needing to export, by acknowledgement key after completing;
3, multimeter to be verified (MF-47 type multimeter) table rod is pressed the output terminal of this tester of positive-negative polarity correspondence access, debug according to the corresponding multimeter reading to be verified of output current value.
Four, resistance verification
1, resistance calibration selected by screen, enters resistance calibration interface;
2, on screen, dummy keyboard input arranges the resistance needing to export, by acknowledgement key after completing;
3, multimeter to be verified (MF-47 type multimeter) table rod is pressed the output terminal of this tester of positive-negative polarity correspondence access, debug according to the corresponding multimeter reading to be verified of output current value.
Five, arrange
1, screen is selected to arrange, and enters and arranges interface;
2, on screen, dummy keyboard input arranges date and time, by acknowledgement key after completing.
Above-described embodiment, be only the specific case further described object of the present invention, technical scheme and beneficial effect, the present invention is not defined in this.All make within scope disclosed by the invention any amendment, equivalent replacement, improvement etc., be all included within protection scope of the present invention.
Claims (7)
1. a touch multimeter tester, it is characterized in that: comprise check system, described check system comprises multi-functional calibration source, embedded scm data processing module, touch screen control module and power module, described embedded scm data processing module comprises S3C2440A embedded scm, and the storer to be connected with this embedded scm, display module, touch screen control module, voltage data acquisition module, voltage range switches control module, current data acquisition module, current range switches control module, resistance data acquisition module and resistance range switch control module, described multi-functional calibration source comprises the AC/DC voltage output module exporting calibration voltage to table to be verified, the DC current output module of calibration current is exported to table to be verified, the resistance output module of calibrated resistance is exported to table to be verified, described AC/DC voltage output module respectively with voltage data acquisition module, voltage range switches control module and connects, described DC current output module respectively with current data acquisition module, current range switches control module and connects, described resistance output module respectively with resistance data acquisition module, resistance range switches control module and connects, described power module is connected with S3C2440A embedded scm, AC/DC voltage output module, DC current output module and resistance output module respectively.
2. touch multimeter tester according to claim 1, is characterized in that: described touch screen control module comprises capacitive touch screen and touching signals is converted to digital signal data processing module.
3. touch multimeter tester according to claim 1, is characterized in that: described display module comprises display screen and display screen driver module.
4. touch multimeter tester according to claim 3, is characterized in that: described display screen is TFT colour liquid crystal display device.
5. touch multimeter tester according to claim 1, is characterized in that: described voltage data acquisition module, current data acquisition module and resistance data acquisition module all adopt 12 AD conversion module.
6. touch multimeter tester according to claim 1, it is characterized in that: described AC/DC voltage output module adopts the adjustable DC-DC boost module of PWM, described DC current output module adopts constant pressure and flow module, described resistance output module adopts precision resister, the resistance combination that error is less than 1%.
7. touch multimeter tester according to claim 1, is characterized in that: described storer is K4S561632N storer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510013839.3A CN104597422A (en) | 2015-01-12 | 2015-01-12 | Touching-type universal meter calibration instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510013839.3A CN104597422A (en) | 2015-01-12 | 2015-01-12 | Touching-type universal meter calibration instrument |
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| CN104597422A true CN104597422A (en) | 2015-05-06 |
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| CN201510013839.3A Pending CN104597422A (en) | 2015-01-12 | 2015-01-12 | Touching-type universal meter calibration instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319522A (en) * | 2015-06-11 | 2016-02-10 | 江苏茶花电气有限公司 | Subway inverter box sensor online detection device |
| CN108614227A (en) * | 2015-12-18 | 2018-10-02 | 诺仪器（中国）有限公司 | The phase frequency calibration method and system of instrument with power measurement function |
| CN111103563A (en) * | 2020-01-16 | 2020-05-05 | 深圳城科科技有限公司 | Automatic correction device of universal meter |
| CN114566085A (en) * | 2022-02-19 | 2022-05-31 | 张庆祺 | Common electrical instrument learning and checking experimental box |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319522A (en) * | 2015-06-11 | 2016-02-10 | 江苏茶花电气有限公司 | Subway inverter box sensor online detection device |
| CN108614227A (en) * | 2015-12-18 | 2018-10-02 | 诺仪器（中国）有限公司 | The phase frequency calibration method and system of instrument with power measurement function |
| CN108614227B (en) * | 2015-12-18 | 2020-09-08 | 一诺仪器（中国）有限公司 | Phase frequency calibration method and system of instrument with power measurement function |
| CN111103563A (en) * | 2020-01-16 | 2020-05-05 | 深圳城科科技有限公司 | Automatic correction device of universal meter |
| CN114566085A (en) * | 2022-02-19 | 2022-05-31 | 张庆祺 | Common electrical instrument learning and checking experimental box |
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Application publication date: 20150506 |