CN201773153U - Alternating-current frequency measuring instrument - Google Patents
Alternating-current frequency measuring instrument Download PDFInfo
- Publication number
- CN201773153U CN201773153U CN2010202298135U CN201020229813U CN201773153U CN 201773153 U CN201773153 U CN 201773153U CN 2010202298135 U CN2010202298135 U CN 2010202298135U CN 201020229813 U CN201020229813 U CN 201020229813U CN 201773153 U CN201773153 U CN 201773153U
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- China
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- alternating
- coil
- housing
- measuring instrument
- coil housing
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to an alternating-current frequency measuring instrument which comprises a coil housing, a circuit housing, a counter, an alternating-current amplifier and an toroidal coil; the coil housing and the circuit housing respectively adopt a metal housing; an opening is formed between the initial end and the tail end of the toroidal coil; the toroidal coil is installed in the coil housing; an opening corresponding to the opening of the toroidal coil is formed on the coil housing; the alternating-current amplifier and the counter are respectively arranged in the circuit housing; the toroidal coil is connected with the alternating-current amplifier; and the alternating-current amplifier is connected with the counter. The measuring instrument can be used for directly measuring the alternating-current frequency in the electrical wire under the condition without accessing the circuit and has extremely high convenient and security.
Description
Affiliated technical field
The utility model relates to the electronic device field, especially a kind of ac frequency measuring instrument.
Background technology
Present ac frequency surveying instrument is a lot, but all comes survey frequency by the incoming transport circuit, and this makes surveying work extremely bother, and has certain Danger Electric shock risk.
Summary of the invention
At the problems referred to above, the purpose of this utility model is to provide a kind of ac frequency measuring instrument, and this measuring instrument can directly be measured the ac frequency in the electric wire under the situation of place in circuit not, have high convenience and security.
The technical scheme that its technical matters that solves the utility model adopts is: this ac frequency measuring instrument comprises coil housing, the circuit shell, counter, AC amplifier, toroid winding, described coil housing and circuit shell are betal can, has opening between described toroidal top and the end, this coil is installed in the described coil housing, this coil housing only surrounds the circular arc in each circle coiling outside 1/2 in the described toroid winding, and this coil housing is also offered and the corresponding opening of toroidal opening, described AC amplifier sum counter is arranged in the described circuit shell, described toroid winding is connected with described AC amplifier, and this AC amplifier is connected with described counter again.
Further, described coil housing and circuit shell are made one.
The beneficial effects of the utility model are: by coil housing and toroidal opening, tested wire is placed toroid winding central authorities, then the alternation toroidal magnetic field major part that alternating current produces in the tested wire is extracted by toroid winding, and alternating current is responded in generation in coil, this induction alternating current flows to counter after AC amplifier is amplified, can write down out the high level number in the unit interval, that is the frequency of alternating current in the tested wire, this ac frequency measuring instrument is directly measured the ac frequency in the electric wire under the situation of place in circuit not, have high convenience and security.
Description of drawings
Accompanying drawing is the structural drawing of this ac frequency measuring instrument.
Among the figure: 1, coil housing; 2, the circuit shell; 3, counter; 4, AC amplifier; 5, toroid winding.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified:
In the accompanying drawing illustrated embodiment, this ac frequency measuring instrument comprises coil housing 1, circuit shell 2, counter 3, AC amplifier 4, toroid winding 5, described coil housing 1 and circuit shell 2 are betal can, has opening between the top of described toroid winding 5 and the end, this coil is installed in the described coil housing 1,1 of this coil housing surrounds the circular arc in each circle coiling outside 1/2 in the described toroid winding 5, and this coil housing 1 is also offered and the corresponding opening of the opening of toroid winding 5, described AC amplifier 4 sum counters 3 are arranged in the described circuit shell 2, and described toroid winding 5 is connected with described AC amplifier 4, and this AC amplifier 4 is connected with described counter 3 again.
Above-mentioned ac frequency measuring instrument, described coil housing 1 and circuit shell 2 are made one.
The principle of work of following this ac frequency measuring instrument of surface analysis: by the opening of coil housing 1 and toroid winding 5, tested wire is placed toroid winding 5 central authorities, then the alternation toroidal magnetic field major part that alternating current produces in the tested wire is extracted by toroid winding 5, the frequency of this alternation toroidal magnetic field is identical with ac frequency in the tested wire, and in coil, produce the induction alternating current of same frequency, this induction alternating current flows to counter 3 after AC amplifier 4 is amplified, can write down out the high level number in the unit interval, that is the frequency of alternating current in the tested wire.
Claims (2)
1. ac frequency measuring instrument, comprise coil housing (1), circuit shell (2), counter (3), AC amplifier (4), toroid winding (5), it is characterized in that: described coil housing (1) and circuit shell (2) are betal can, has opening between the top of described toroid winding (5) and the end, this coil is installed in the described coil housing (1), this coil housing (1) only surrounds the circular arc in each circle coiling outside 1/2 in the described toroid winding (5), and this coil housing (1) is also offered the corresponding opening of opening with toroid winding (5), described AC amplifier (4) sum counter 3 is arranged in the described circuit shell (2), and described toroid winding (5) is connected with described AC amplifier 4, and this AC amplifier (4) is connected with described counter (3) again.
2. ac frequency measuring instrument according to claim 1 is characterized in that: described coil housing (1) and circuit shell (2) are made one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202298135U CN201773153U (en) | 2010-06-21 | 2010-06-21 | Alternating-current frequency measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202298135U CN201773153U (en) | 2010-06-21 | 2010-06-21 | Alternating-current frequency measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201773153U true CN201773153U (en) | 2011-03-23 |
Family
ID=43752999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202298135U Expired - Fee Related CN201773153U (en) | 2010-06-21 | 2010-06-21 | Alternating-current frequency measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201773153U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459310A (en) * | 2014-10-24 | 2015-03-25 | 航天科工深圳（集团）有限公司 | Alternating voltage frequency acquisition device |
-
2010
- 2010-06-21 CN CN2010202298135U patent/CN201773153U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459310A (en) * | 2014-10-24 | 2015-03-25 | 航天科工深圳（集团）有限公司 | Alternating voltage frequency acquisition device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20110621 |