CN201732110U - Multimeter - Google Patents
Multimeter Download PDFInfo
- Publication number
- CN201732110U CN201732110U CN2010202096646U CN201020209664U CN201732110U CN 201732110 U CN201732110 U CN 201732110U CN 2010202096646 U CN2010202096646 U CN 2010202096646U CN 201020209664 U CN201020209664 U CN 201020209664U CN 201732110 U CN201732110 U CN 201732110U
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- circuit
- analog front
- multimeter
- chip microcomputer
- measured
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 14
- 230000007257 malfunction Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000004973 liquid crystal related substance Substances 0.000 abstract 1
- 238000007781 pre-processing Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a multimeter. The circuit of the multimeter comprises a measured signal acquisition circuit, an analog front-end circuit, a digital to analog converter, a single-chip microcomputer controlled circuit and a liquid crystal display which are connected in sequence, and the single-chip microcomputer controlled circuit is connected with the analog front-end circuit. The single-chip microcomputer controlled circuit comprises a memory unit, an abnormity judgment unit, a sending/receiving unit and a control unit; a single-chip microcomputer is connected with the analog front-end circuit to control the analog front-end circuit and/or feed back information; and the single-chip microcomputer controlled circuit can control the state of the analog front-end circuit through setting to adjust the preprocessing mechanism to measured signals by the analog front-end circuit. The single-chip microcomputer controlled circuit comprises the abnormity judgment unit, and can timely and accurately judge whether the measured signals are abnormal, thereby being capable of accurately measuring signals in a real time manner, and improving the measurement efficiency and accuracy rate.
Description
Technical field
The utility model relates to a kind of surveying instrument, particularly relates to a kind of multimeter.
Background technology:
At present, be used for such as the surveying instrument of factory, laboratory or family more and more generally, wherein to have purposes many for multimeter, and advantage such as range is wide, and is easy to use is an instrument the most frequently used in the electronic surveying.It can be used for measuring resistance, combined-voltage and DC voltage.The multimeter that has can also be measured the electric capacity of transistorized major parameter and capacitor etc.
Multimeter on the market generally can show normal measurement result, but when mistake appears in measurement data, such as when measuring power, multimeter can only detect electric current and can not detect voltage, multimeter can not show correct power, and it is unusual to judge which part occurs, and needs a kind of multimeter that can accurately judge abnormal conditions.
The utility model content:
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of multimeter is provided, and when measuring-signal is not normal, can judges any part and occur unusually, and quick and precisely.
In order to achieve the above object, the technical solution adopted in the utility model is: a kind of multimeter, circuit is connected to form by measured signal Acquisition Circuit, analog front circuit, digital to analog converter, single chip machine controlling circuit, LCDs successively, single chip machine controlling circuit comprises storage unit, abnormal deciding means, transmission/receiving element, control module, and single chip machine controlling circuit is connected to analog front circuit analog front circuit is controlled and/or feedback information.Single chip machine controlling circuit is intended the pre-service mechanism of front-end circuit to measured signal by the relevant state that is provided with on the may command analog front circuit to reach adjustable mould preparation.In the abnormal deciding means, the load circuit of the data that voltage, electric current, electric capacity, resistance are to be measured is connected to multimeter, each road load circuit is provided with corresponding light emitting diode as display circuit, when abnormal deciding means judges that the appearance of one of voltage, electric current, electric capacity, resistance data to be measured is unusual, then corresponding display circuit cisco unity malfunction.
Compared with prior art, the beneficial effects of the utility model are: include abnormal deciding means in the single chip machine controlling circuit, can judge promptly and accurately whether measured signal exists unusually, thus can be in real time, measuring-signal accurately, improve efficiency of measurement and accuracy rate.
Description of drawings:
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a single chip machine controlling circuit cut-away view of the present utility model.
Embodiment:
Central idea of the present utility model is to overcome the deficiencies in the prior art, and a kind of multimeter is provided, can be promptly and accurately to judging unusually that measured signal occurs.Be elaborated with reference to accompanying drawing below in conjunction with embodiment, so that technical characterictic of the present utility model and advantage are carried out more deep annotation.
Theory diagram of the present utility model as shown in Figure 1, a kind of multimeter, circuit are connected to form by measured signal Acquisition Circuit, analog front circuit, digital to analog converter, single chip machine controlling circuit, LCDs successively, single-chip microcomputer is connected to analog front circuit.
The cut-away view of single chip machine controlling circuit comprises storage unit, abnormal deciding means, transmission/receiving element, control module as shown in Figure 2, and single chip machine controlling circuit is connected to analog front circuit analog front circuit is controlled and/or feedback information.Single chip machine controlling circuit is intended the pre-service mechanism of front-end circuit to measured signal by the relevant state that is provided with on the may command analog front circuit to reach adjustable mould preparation.In the abnormal deciding means, the load circuit of the data that voltage, electric current, electric capacity, resistance are to be measured is connected to multimeter, each road load circuit is provided with corresponding light emitting diode as display circuit, when abnormal deciding means judges that the appearance of one of voltage, electric current, electric capacity, resistance data to be measured is unusual, then corresponding display circuit cisco unity malfunction.
In measuring process, signal acquisition circuit outputs to analog front circuit after measured signal is gathered, analog front circuit carries out entering digital to analog converter after the processing and amplifying to signal and carries out digital-to-analog conversion, carrying out signal after the digital-to-analog conversion enters into single chip machine controlling circuit and stores, the control module of single chip machine controlling circuit is adjusted the pre-service mechanism of measured signal the AFE (analog front end) signal according to the signal that receives, the abnormal deciding means of single chip machine controlling circuit is judged measured signal, the then corresponding display circuit cisco unity malfunction of abnormal signal occurs unusual according to which road signal measurement of the circuit judges that can not show.Signal is normally then delivered to LCDs by transmitting element and is shown normal result.
Claims (3)
1. multimeter, circuit is connected to form by measured signal Acquisition Circuit, analog front circuit, digital to analog converter, single chip machine controlling circuit, LCDs successively, single-chip microcomputer is connected to analog front circuit, it is characterized in that: single chip machine controlling circuit comprises abnormal deciding means.
2. a kind of multimeter according to claim 1, it is characterized in that: in the described abnormal deciding means, the load circuit of the data that voltage, electric current, electric capacity, resistance are to be measured is connected to multimeter, each road load circuit is provided with corresponding light emitting diode as display circuit, when abnormal deciding means judges that the appearance of one of voltage, electric current, electric capacity, resistance data to be measured is unusual, then corresponding display circuit cisco unity malfunction.
3. according to each described a kind of multimeter in the claim 1～2, it is characterized in that: described single chip machine controlling circuit also comprises storage unit, transmission/receiving element, analog front circuit is controlled and/or the control module of feedback information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202096646U CN201732110U (en) | 2010-05-27 | 2010-05-27 | Multimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202096646U CN201732110U (en) | 2010-05-27 | 2010-05-27 | Multimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201732110U true CN201732110U (en) | 2011-02-02 |
Family
ID=43523269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202096646U Expired - Fee Related CN201732110U (en) | 2010-05-27 | 2010-05-27 | Multimeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201732110U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197112A (en) * | 2013-03-19 | 2013-07-10 | 优利德科技(中国)有限公司 | An intelligent digital multimeter |
| CN104237619B (en) * | 2014-07-07 | 2018-07-06 | 武汉振道世纪科技有限公司 | Intelligent general-purpose An Fubiao |
| CN110672900A (en) * | 2019-11-01 | 2020-01-10 | 菏泽学院 | Low power digital multifunction meter |
-
2010
- 2010-05-27 CN CN2010202096646U patent/CN201732110U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197112A (en) * | 2013-03-19 | 2013-07-10 | 优利德科技(中国)有限公司 | An intelligent digital multimeter |
| CN104237619B (en) * | 2014-07-07 | 2018-07-06 | 武汉振道世纪科技有限公司 | Intelligent general-purpose An Fubiao |
| CN110672900A (en) * | 2019-11-01 | 2020-01-10 | 菏泽学院 | Low power digital multifunction meter |
| CN110672900B (en) * | 2019-11-01 | 2024-05-28 | 菏泽学院 | Low-power consumption digital multifunctional meter |
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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 | ||
| CP03 | Change of name, title or address |
Address after: 523000 Guangdong Province, Dongguan Songshan Lake high tech Industrial Development Zone No. 9 Keyuan pine building room 216 Patentee after: Dongguan Friends Instrument Co., Ltd. Address before: 523000 Guangdong Province, Dongguan City Road 162, kiho Kiu building, A block 804 Patentee before: Dongguan Friends Instrument Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20170527 |