CN1450352A - Clamp on dc amperemeter - Google Patents
Clamp on dc amperemeter Download PDFInfo
- Publication number
- CN1450352A CN1450352A CN 03116536 CN03116536A CN1450352A CN 1450352 A CN1450352 A CN 1450352A CN 03116536 CN03116536 CN 03116536 CN 03116536 A CN03116536 A CN 03116536A CN 1450352 A CN1450352 A CN 1450352A
- Authority
- CN
- China
- Prior art keywords
- output end
- linked
- pincers
- circuit
- ammeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention is a pincerlike dc ammeter, providing a non-connecting dc ammeter. It consists of induction pincers, Hall component, amplifying circuit, measuring range converting circuit and meter head, the Hall component set in the installating mouth of the induction pincers, the output end linked with the input end of the amplifying circuit whose output end is linked with the converting circuit, the output end of the converting circuit linked with the meter head, and uses the magnetic field due to direct current to act on the Hall component through the induction pincers, and makes the meter head display the corresponding values after the amplification and conversion, so indirectly indicate the current magnitude in the lead.
Description
Affiliated technical field
The present invention relates to a kind of current instruments.
Background technology
Existing DC ammeter need be connected in the circuit when measuring electric current and measure, and will disconnect lead when promptly measuring, and inserts reometer, lead is taken back after survey is good again, and the program complexity is operated inconvenience like this.And present pincerlike meter is to adopt way of electromagnetic induction, can only alternating current be measured, and can't realize non-access formula measurement to DC current.
Summary of the invention
The object of the invention is to provide a kind of pincerlike meter of energy measurement DC current, realizes that the non-access formula of DC current is measured.
The solution of the present invention is: the present invention is made up of induction pincers, Hall element, amplifying circuit, range change-over circuit, gauge outfit, Hall element is arranged in the installing port of induction pincers caliper, its output terminal is connected with input amplifier, the output terminal of amplifying circuit is connected with the range change-over circuit, and range change-over circuit output terminal is connected with gauge outfit.The magnetic field that utilizes direct current to produce acts on Hall element through the induction pincers, amplifies by amplifying circuit, and the conversion of range change-over circuit makes gauge outfit demonstrate corresponding value, indicates the size of electric current in the lead indirectly.
Advantage of the present invention is: the strong and weak measurement size of current indirectly that realizes in magnetic field by Hall element sense current in direct electric current produces, realized non-access formula dc current measurement, and compare with access type measurement in the past, make the process of measurement simple operations convenient.
Description of drawings
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings below.
Fig. 1 is an electrical schematic diagram of the present invention
Fig. 2 is that the present invention responds to pincers part-structure figure
Among Fig. 1, IC
1It is Hall element; IC
2, IC
3Be operational amplifier, with resistance R
1, R
2, R
3, R
4, R
5Form amplifying circuit; Resistance R
6, R
7, R
8, range switch K forms the range change-over circuit; G is a gauge outfit.
Among Fig. 2, the 1st, caliper, the 2nd, bearing support, the 3rd, installing port.
Embodiment
It is UGN3503 linear Integrated Hall element that embodiment adopts model, and this element is exported corresponding level signal under the varying strength the action of a magnetic field.By shown in Figure 1, Hall element IC
1Output terminal with by IC
2, IC
3And R
1, R
2, R
3, R
4, R
5The amplifying circuit of forming connects, wherein IC
2, R
1, R
2, R
3, R
4, R
5The differential signal amplifier of forming is to IC
1The level signal of output is amplified; IC
3Be voltage follower, drive in order to the next stage circuit is done output.R
6, R
7, R
8, K forms the range change-over circuit, with range switch resistance selected, switched, and makes the corresponding resistance serial connection with different resistances of gauge outfit G, the needs when realizing different ranges measurement.During work, tested electric current produces magnetic field, makes IC
1Export corresponding level signal, again by IC
2Amplify, by IC
3Output is through R
6And R
7, R
8In a resistance current limliting and drive gauge outfit, indicate the size of electric current indirectly.
By shown in Figure 2, the caliper (1) that sense pincers are answered is contained on the bearing support (2), and caliper (1) is for disconnecting design, is leaving installing port (3) going up the relevant position with bearing support (2), and Hall unit is embedded in this installing port (3).Lead is placed in the middle cavity of caliper (1) during work, and the magnetic line of force of its generation is concentrated in vivo by caliper (1), and passes through Hall element in installing port (3) position, makes Hall unit be subjected to the control in this magnetic field, exports corresponding level signal.
Claims (1)
- A kind of pincerlike DC ammeter, form by induction pincers, Hall element, amplifying circuit, range change-over circuit, gauge outfit, it is characterized in that: Hall element is arranged in the installing port of induction pincers caliper, its output terminal is connected with input amplifier, amplification circuit output end is connected with the range change-over circuit, and range change-over circuit output terminal is connected with gauge outfit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116536 CN1450352A (en) | 2003-04-21 | 2003-04-21 | Clamp on dc amperemeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116536 CN1450352A (en) | 2003-04-21 | 2003-04-21 | Clamp on dc amperemeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1450352A true CN1450352A (en) | 2003-10-22 |
Family
ID=28684193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03116536 Pending CN1450352A (en) | 2003-04-21 | 2003-04-21 | Clamp on dc amperemeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1450352A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072780A (en) * | 2016-11-11 | 2018-05-25 | 弗兰克公司 | Non-contact electric current measurement system |
| CN108267621A (en) * | 2018-03-22 | 2018-07-10 | 广东电网有限责任公司清远供电局 | A kind of jaw type current measurer based on Hall element |
| CN113125836A (en) * | 2021-04-15 | 2021-07-16 | 青岛汉泰智能科技有限公司 | Current probe |
-
2003
- 2003-04-21 CN CN 03116536 patent/CN1450352A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072780A (en) * | 2016-11-11 | 2018-05-25 | 弗兰克公司 | Non-contact electric current measurement system |
| CN108072780B (en) * | 2016-11-11 | 2022-03-11 | 弗兰克公司 | Non-contact current measuring system |
| CN108267621A (en) * | 2018-03-22 | 2018-07-10 | 广东电网有限责任公司清远供电局 | A kind of jaw type current measurer based on Hall element |
| CN113125836A (en) * | 2021-04-15 | 2021-07-16 | 青岛汉泰智能科技有限公司 | Current probe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2439544B1 (en) | MEMS current sensing apparatus | |
| CN202305636U (en) | High-overload Hall current sensor | |
| CN110470868A (en) | Clamp for contactless electric parameter measurement is popped one's head in | |
| CN1450352A (en) | Clamp on dc amperemeter | |
| CN209070006U (en) | A kind of current sensor | |
| CN203191123U (en) | Digital display relay dynamometer | |
| CN202486194U (en) | Current sensor based on Rogowski coil | |
| CN202501823U (en) | Long stroke linear displacement non-contact measuring device | |
| EP2275827A3 (en) | Clamp-on multimeters including a rogowski coil for measuring alternating current in a conductor | |
| CN201788222U (en) | AC-DC (alternating current-direct current) compatible isolated voltage sampling circuit | |
| CN201152885Y (en) | Non-contact current measuring apparatus | |
| CN101162242B (en) | Method for testing direct current by quadrature transformer | |
| CN201780358U (en) | Detection device capable of automatically changing magnetic field intensity | |
| CN102103156B (en) | Digital current transformer and method for measuring current of AC (Alternating Current) transmission conductor | |
| CN201615923U (en) | Alternating current voltage measuring circuit | |
| CN213181743U (en) | Current detection device for circuit breaker | |
| CN209055596U (en) | A kind of marine electric propeller current detecting system | |
| CN206489220U (en) | One kind is based on single-chip microcomputer microresistivity survey system | |
| CN201034549Y (en) | Hand pulling type automatic measuring unit | |
| CN202003002U (en) | Intelligent digital inter-turn voltage endurance integrated test system | |
| CN214251204U (en) | Electromagnetic flow converter detection device | |
| CN110244106A (en) | A kind of equipment of non-intrusion type metering current and voltage | |
| CN2795860Y (en) | Giant magnet resistor rotation speed sensor | |
| CN2881967Y (en) | Film low dissipation strong magnet reluctance sensing device | |
| CN2677947Y (en) | Integral digital AC.-DC two-purpose arc-welding power-supply testing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |