CN201955382U - Alternating current and magnetic field intensity measuring instrument - Google Patents
Alternating current and magnetic field intensity measuring instrument Download PDFInfo
- Publication number
- CN201955382U CN201955382U CN2011200337892U CN201120033789U CN201955382U CN 201955382 U CN201955382 U CN 201955382U CN 2011200337892 U CN2011200337892 U CN 2011200337892U CN 201120033789 U CN201120033789 U CN 201120033789U CN 201955382 U CN201955382 U CN 201955382U
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- circuit
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- alternating current
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- probe
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Abstract
The utility model provides an alternating current and magnetic field intensity measuring instrument, which relates to an electromagnetic measuring instrument and is provided with a current probe, an alternating current amplification circuit, an interlinking conversion circuit, a power supply circuit, a wave detection circuit and a display circuit, wherein a test clamp is arranged on the current probe, the output end of the current probe is connected with the input end of the alternating current amplification circuit, the input end of the alternating current amplification circuit is connected with the input end of the interlinking conversion circuit, the output end of the interlinking conversion circuit is connected with the input end of the wave detection circuit, the output end of the wave detection circuit is connected with the input end of the display circuit, the power supply circuit is respectively and electrically connected with the alternating current amplification circuit, the interlinking conversion circuit, the wave detection circuit and the display circuit, and an embedded type meter magnetic probe is arranged on the current probe. The alternating current and magnetic field intensity measuring instrument belongs to an instrument capable of measuring alternating current without magneto-electricity conversion and can be particularly used for measuring heavy current, the current passing through a conducting wire is measured through a magnetic crack opening of an embedded meter, the alternating current and magnetic field intensity measuring instrument belongs to a device for measuring the current in a non-contact and non-embedding way, and the measurement is more sensitive.
Description
Technical field
The utility model relates to a kind of electromagnetic measurement instrument, especially relates to a kind of alternating current and magnetic field intensity measuring instrument.
Background technology
Existing alternating current embedding type table exists measurement range limited, and Ampere currents up to ten thousand such as can't measure at deficiency.
The applicant is simultaneously displayed on a liquid crystal alternating voltage and the two tables that show of electric current on the LCDs in two kinds of measurement results that Chinese patent CN201035095 discloses a kind of alternating voltage and electric current.Be provided with alternating voltage sample circuit, voltage ac-dc converter circuit, voltage analog to digital conversion circuit, current sampling circuit, current sampling amplifying circuit, electric current ac-dc converter circuit, electric current analog to digital conversion circuit, liquid crystal voltage and current display circuit and power circuit.The external civil power of alternating voltage sample circuit input end, alternating voltage sample circuit, voltage ac-dc converter circuit and voltage analog to digital conversion circuit join successively, and voltage-mode number conversion circuit output end connects the display circuit input end; The external civil power of current sampling circuit input end, current sampling circuit, current sampling amplifying circuit, electric current ac-dc converter circuit and electric current analog to digital conversion circuit join successively, and current-mode number conversion circuit output end connects the display circuit input end.
The applicant discloses the safety socket of a kind of brilliant lamp digital display alternating voltage, electric current and power again in Chinese patent CN201256217, be provided with socket, power supply stabilization circuit, AC-input voltage sample circuit, voltage display, current sampling circuit, electric current amplification demodulatoring circuit, Current Display, power display, overcurrent discriminator circuit, electric leakage overcurrent memory circuit, gauge tap, leakage-responsive device and electric leakage discriminator circuit.Voltage display input termination AC-input voltage sample circuit output terminal, electric current amplification demodulatoring circuit input termination current sampling circuit output terminal, Current Display input end and power display input termination electric current amplification demodulatoring circuit output terminal, overcurrent discriminator circuit input termination electric current amplification demodulatoring circuit output terminal, electric leakage overcurrent memory circuit input end is connected with electric leakage discriminator circuit output terminal with overcurrent discriminator circuit output terminal respectively, electric leakage discriminator circuit input termination leakage-responsive device output terminal, gauge tap and AC-input voltage, electric leakage overcurrent memory circuit output terminal connects.
The measurement electric current of above-mentioned 2 patents does not adopt mutual inductor, but utilizes the resistance direct sample.
Summary of the invention
The purpose of this utility model is to provide a kind of ac current measurement sensitivity higher, measurement range broad, can measure the alternating current and the magnetic field intensity measuring instrument of alternating current and magnetic field intensity simultaneously.
The utility model is provided with current probe, ac amplifier circuit, crosslinked change-over circuit, power circuit, detecting circuit and display circuit; Current probe is provided with test clip, the output termination ac amplifier circuit input end of current probe, the crosslinked change-over circuit input end of ac amplifier circuit input termination, crosslinked change-over circuit output termination detecting circuit input end, detecting circuit output termination display circuit input end, power circuit is electrically connected with ac amplifier circuit, crosslinked change-over circuit, detecting circuit and display circuit respectively.
Can be provided with embedding type table magnetic probe on the described current probe.
When the heed contacted measure leakage field field intensity, as long as the output winding that current probe is received embedding type table magnetic probe just can be measured; In order to measure the single cord electric current, also be the output winding of current probe of the present utility model being received embedding type table magnetic probe, and embedding of embedding type table magnetic probe sandwich the lead of switching on can measure.
Compare with existing ac current measurement instrument, the utility model is owing to be provided with embedding type table magnetic probe (embedding sections core), therefore at the opening part of embedding sections core, the magnetic crack can be used as a magnetosensitive and visits mouth, this all has its convenience for leakage field, magnetic field intensity, non-contact measurement electric current, can carry out magnetosensitive and measure.Owing to, therefore can obviously improve the sensitivity of current measurement with electronics sampling and the synthetic combination table of the line inclusion of embedding sections core.Owing to adopt the electronics sampling method, cancel the method for the measurement electric current of ferromagnetic conversion, therefore can replace embedding type table, and lighter and handier, easy, body is little, measurement range is wide.
The utility model is a kind ofly can measure the instrument of alternating current without magnetoelectricity conversion, especially measures big electric current.
The utility model utilizes the magnetic crack openings place of embedding type table to measure the electric current that lead passes through, and is a kind of device in a kind of measurement electric current that does not contact, do not embed and magnetic field, measures sensitiveer.
Description of drawings
Fig. 1 is the structure composition frame chart of the E-communication current measurement part of the utility model embodiment.
Fig. 2 is the current probe of the utility model embodiment and the annexation synoptic diagram of test clip.
Fig. 3 is that the structure of the embedding type table magnetic probe of the utility model embodiment is formed synoptic diagram.
Fig. 4 is that the circuit of the utility model embodiment is formed schematic diagram.
Embodiment
Following examples will be further described the utility model in conjunction with the accompanying drawings.
Referring to Fig. 1～3, the utility model embodiment is provided with embedding type table magnetic probe (embedding sections core) 7, current probe 1, test clip 11, ac amplifier circuit 2, crosslinked change-over circuit 3, power circuit 4, detecting circuit 5 and display circuit 6; Current probe 1 is provided with test clip 11, output termination ac amplifier circuit 2 input ends of current probe 1, crosslinked change-over circuit 3 input ends of ac amplifier circuit 2 input terminations, crosslinked change-over circuit 3 output termination detecting circuits 5 input ends, detecting circuit 5 output termination display circuits 6 input ends, power circuit 4 is electrically connected with ac amplifier circuit 2, crosslinked change-over circuit 3, detecting circuit 4 and display circuit 5 respectively.
During use, after power switch is opened, after measuring current probe 1 is experienced signal, deliver to ac amplifier circuit 2 immediately and amplify, deliver to detecting circuit 5 through crosslinked change-over circuit 3 again and carry out detection, the detection output signal of detecting circuit 5 is delivered to display circuit 6 at last and is shown.
The utility model can be measured the instrument of alternating current without magnetoelectricity conversion, especially measures big electric current.Utilizing the magnetic crack openings place of embedding type table magnetic probe (embedding sections core) to measure the electric current that lead passes through, is a kind of device in a kind of measurement electric current that does not contact, do not embed and magnetic field, measures sensitiveer.
Fig. 4 provides the circuit of the utility model embodiment and forms schematic diagram, and after K switch 1 was opened, power supply offered each circuit, and instrument is started working.
When resistance R 1 and diode D1 and D2 form lead that the test clip of current probe surveys load are arranged, immediately signal is amplified through the input of the pin 2 of integrated circuit U2A, its amplifying signal forwards 8 pin of integrated circuit U1 (being crosslinked change-over circuit) to through the pin 1 of U2A, and 2 pin that are linked to integrated circuit U3A carry out detection, signal after the detection is passed through 10 pin of U1 again by 1 pin of U3A, convert DC current to, after offering the filtering voltage regulation of capacitor C 3 and resistance R T1, R1 by 20 pin of U1 again, offer display circuit through the tap of RT1.
Claims (2)
1. alternating current and magnetic field intensity measuring instrument is characterized in that being provided with current probe, ac amplifier circuit, crosslinked change-over circuit, power circuit, detecting circuit and display circuit; Current probe is provided with test clip, the output termination ac amplifier circuit input end of current probe, the crosslinked change-over circuit input end of ac amplifier circuit input termination, crosslinked change-over circuit output termination detecting circuit input end, detecting circuit output termination display circuit input end, power circuit is electrically connected with ac amplifier circuit, crosslinked change-over circuit, detecting circuit and display circuit respectively.
2. alternating current as claimed in claim 1 and magnetic field intensity measuring instrument is characterized in that described current probe is provided with embedding type table magnetic probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200337892U CN201955382U (en) | 2011-01-30 | 2011-01-30 | Alternating current and magnetic field intensity measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200337892U CN201955382U (en) | 2011-01-30 | 2011-01-30 | Alternating current and magnetic field intensity measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955382U true CN201955382U (en) | 2011-08-31 |
Family
ID=44499490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200337892U Expired - Fee Related CN201955382U (en) | 2011-01-30 | 2011-01-30 | Alternating current and magnetic field intensity measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201955382U (en) |
-
2011
- 2011-01-30 CN CN2011200337892U patent/CN201955382U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20150130 |
|
| EXPY | Termination of patent right or utility model |