CN2716846Y - A digital AC forcipiform meter with automatic measurement range - Google Patents
A digital AC forcipiform meter with automatic measurement range Download PDFInfo
- Publication number
- CN2716846Y CN2716846Y CN 03248943 CN03248943U CN2716846Y CN 2716846 Y CN2716846 Y CN 2716846Y CN 03248943 CN03248943 CN 03248943 CN 03248943 U CN03248943 U CN 03248943U CN 2716846 Y CN2716846 Y CN 2716846Y
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- Prior art keywords
- converter
- diode
- digital
- switch
- meter
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- Expired - Fee Related
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Abstract
The utility model relates to a digital alternative current (AC) forcipiform meter with the automatic measurement range, and is composed of the interconnection of a tong head, an input jack, a slide way switch, a button switch, an analog-to-digital (A/D) converter and a liquid crystal display (LCD). The utility model adopts FS9952 integrated circuit A/D converter, and has the function of measuring the alternative current, the alternative current voltage, the resistance, the buzzer and the diode. The utility model has automatical switching of the measuring range and locking the reading of the LCD display, and has the function of auto-shut-off. The fabrication cost is lower than the existing like forcipiform meter.
Description
Affiliated technical field
The utility model relates to a kind of digital pincerlike meter.
Background technology
Existing 9030 type ac digital pincerlike meters adopt large scale integrated circuit NJU9207A/D converter chip, can measure alternating current, alternating voltage, have automatic range conversion, hummer and data interlock function.It adopts the slide switch that four gears are arranged, and switches shutdown, electric current, voltage, hummer gear respectively; A single-pole double-throw (SPDT) pushbutton switch is used to lock the reading of display.
The defective of this pincerlike meter is can not measuring resistance, do not have diode measurement function and shutdown function automatically.And main integrated circuit NJU9207 price is higher, makes the complete machine cost high.
Summary of the invention
In order to overcome the deficiency that existing 9030 ac digital pincerlike meters exist, the utility model provide a kind of can automatic conversioning broad, digital pincerlike meter that cost is low; It has functions such as alternating current, alternating voltage, resistance measurement and hummer, diode, reading locking; Forget the user under the situation of shutdown, can cut off the power supply of instrument automatically, save the power consumption of battery.The technical scheme that its technical matters that solves the utility model adopts is:
A kind of digital AC pincerlike meter of automatic range is by binding clip [1], input jack [2], and slideway switch [3], pushbutton switch [4], A/D converter [5], LCD [6] is electrically connected mutually.It is characterized in that: slideway switch [3] has four set of contact slide plates, four gear: OFF, A, V, Ω/Bz/Diode, corresponding shutdown respectively, electric current, voltage, resistance/hummer/diode shelves; Pushbutton switch [4] is one does not have lock dpdt double-pole double-throw (DPDT) trigger switch, and it and slideway switch [3] make up, and at A, V gear, it can trigger A/D converter HOLD terminal, the reading of locking LCD; At Ω/Bz/Diode gear, it can trigger the SELECT terminal, successively this pincerlike meter is arranged to resistance/hummer/diode test mode.A/D converter adopts FS9952, its inside to have fluid drive, reading locking, the function of shutting down automatically, and price only is 1/3rd of NJU9207.
The beneficial effects of the utility model are, can measure alternating current, alternating voltage, resistance, diode, hummer, have fluid drive, show dimension, shutdown and data interlock function automatically automatically.Its cost only is 1/2nd of 9030 split-core type meters.It can be used as a kind of electrician's common tool, is used for the installation and the maintenance of electric wiring, equipment.
Description of drawings:
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is an electrical schematic diagram of the present utility model.
Among the figure: 1. binding clip 2. input jacks 3. slideway switches 4. function selecting button 5.A/D converters 6. LCD.
Embodiment
In Fig. 2, binding clip [1] is made of iron core and coil, and binding clip can be opened so that put into measured lead.When measuring alternating current, the current signal that binding clip is sensed converts voltage signal on sample resistance R12, after trimmer potentiometer VR2, resistance R 13 dividing potential drops, be sent to the SA terminal of A/D converter [5], in A/D converter, carry out automatic range conversion, AC/DC conversion, finally convert digital quantity output to, drive LCD [6] and demonstrate the measured currents reading.When measuring alternating voltage, signal is by input jack [2] input, by thermistor PTC, R1, R2, enter A/D converter, demonstrates reading through similar process by LCD [6].Slideway switch [3] has four gear: OFF, A, V, Ω/Bz/Diode, corresponding shutdown respectively, electric current, voltage, resistance/hummer/diode shelves; It has four set of contact slide plates, A/D converter [5] and binding clip [1] are connected or A/D converter and input jack [2] are connected according to the needs of test event, it also is provided with each terminal of MEA2, MEA3 simultaneously, makes A/D converter finish corresponding electric current, voltage, resistance/hummer/diode measurement function.Pushbutton switch [4] is one does not have lock dpdt double-pole double-throw (DPDT) trigger switch, and it and slideway switch [3] make up, and double action is arranged: at A, V gear, and the HOLD terminal of its half triggered A/D converter, the reading of locking LCD; At Ω/Bz/Diode gear, it second half can be taken turns the instrument of changing commanders and be arranged to resistance/hummer/diode test mode by triggering the SELECT terminal of A/D converter successively.The utility model adopts FS9952 type A/D converter ic, and this integrated circuit has multiple integrated functionalities, can finish a measurement function such as AC and DC voltage, electric current, resistance, hummer, diode.The utility model is by two joint 1.5V powered battery, measure action finish after 15 minutes, if the user forgets shutdown, FS9952 can cut off power supply automatically, in order to avoid the waste battery electric power.
Claims (2)
1. the digital AC pincerlike meter of an automatic range, be electrically connected mutually by binding clip [1], input jack [2], slideway switch [3], button [4], A/D converter [5], LCD display [6], it is characterized in that: slideway switch [3] has four set of contact slide plates, four gear: OFF, A, V, Ω/Bz/Diode, corresponding shutdown respectively, electric current, voltage, resistance/hummer/diode shelves; Pushbutton switch [4] is one does not have lock dpdt double-pole double-throw (DPDT) trigger switch, and it and slideway switch [3] make up, and at A, V gear, it can trigger A/D converter HOLD terminal, the reading of locking LCD; At Ω/Bz/Diode gear, it can trigger the SELECT terminal, successively this pincerlike meter is arranged to resistance/hummer/diode test mode.
2. the digital AC pincerlike meter of automatic range according to claim 1, it is characterized in that: A/D converter [5] uses FS9952.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03248943 CN2716846Y (en) | 2003-09-28 | 2003-09-28 | A digital AC forcipiform meter with automatic measurement range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03248943 CN2716846Y (en) | 2003-09-28 | 2003-09-28 | A digital AC forcipiform meter with automatic measurement range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2716846Y true CN2716846Y (en) | 2005-08-10 |
Family
ID=34866253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03248943 Expired - Fee Related CN2716846Y (en) | 2003-09-28 | 2003-09-28 | A digital AC forcipiform meter with automatic measurement range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2716846Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459263A (en) * | 2014-12-05 | 2015-03-25 | 深圳市创荣发电子有限公司 | Pointer ampere meter capable of automatically shifting gears |
| CN105092928A (en) * | 2015-07-23 | 2015-11-25 | 高超 | Digital clamp meter and automatic measurement method |
| CN105372469A (en) * | 2014-08-13 | 2016-03-02 | 浙江巨磁智能技术有限公司 | Method for adjusting measuring range of current sensor and sensor utilizing the method |
-
2003
- 2003-09-28 CN CN 03248943 patent/CN2716846Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372469A (en) * | 2014-08-13 | 2016-03-02 | 浙江巨磁智能技术有限公司 | Method for adjusting measuring range of current sensor and sensor utilizing the method |
| CN104459263A (en) * | 2014-12-05 | 2015-03-25 | 深圳市创荣发电子有限公司 | Pointer ampere meter capable of automatically shifting gears |
| CN105092928A (en) * | 2015-07-23 | 2015-11-25 | 高超 | Digital clamp meter and automatic measurement method |
| CN105092928B (en) * | 2015-07-23 | 2018-04-20 | 深圳市华谊智测科技股份有限公司 | Digital split-core type meter and its method for automatic measurement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhangzhou Dongnan Electronic Technology Research Institute Assignor: Xu Xian Contract fulfillment period: 2009.12.1 to 2012.1.23 Contract record no.: 2009350000264 Denomination of utility model: A digital AC forcipiform meter with automatic measurement range Granted publication date: 20050810 License type: Exclusive license Record date: 20091225 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.12.1 TO 2012.1.23; CHANGE OF CONTRACT Name of requester: ZHANGZHOU CITY SOUTHEAST INSTITUTE OF ELECTRONIC T Effective date: 20091225 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050810 Termination date: 20110928 |