CN102981051A - Digital display type frequency meter - Google Patents
Digital display type frequency meter Download PDFInfo
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- CN102981051A CN102981051A CN 201110265972 CN201110265972A CN102981051A CN 102981051 A CN102981051 A CN 102981051A CN 201110265972 CN201110265972 CN 201110265972 CN 201110265972 A CN201110265972 A CN 201110265972A CN 102981051 A CN102981051 A CN 102981051A
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- digital display
- display type
- frequency meter
- type frequency
- control circuit
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Abstract
The invention discloses a digital display type frequency meter in the field of frequency meters. The digital display type frequency meter comprises a time-base circuit. The signal output end of the time-base circuit is connected with the signal input end of a control circuit module. The signal output end of the control circuit module is connected with the signal input end of an operational circuit. The signal output end of the operational circuit is connected with a display unit. According to the digital display type frequency meter, pulses are sent to a counter as control signals through the time-base circuit. When measured signals are detected by the control circuit, the counter conducts counting to achieve detection to measured signal frequency. The digital display type frequency meter is simple in structure, high in measuring speed, convenient to measure, and capable of being used on an occasion of tight measuring frequency.
Description
Technical field
The present invention relates to a kind of frequency meter, particularly a kind of digital display type frequency meter.
Background technology
Along with the develop rapidly of electronic technology, all kinds of discrete electronic components and the correlation function that consists of thereof, progressively by powerful, performance is more stable, use more easily that integrated chip replaces.Digital frequency meter is towards multi-functional, miniaturization, high performance-price ratio future development.In order to be issued to higher frequency meter index in low-cost condition, utilizing chip multi-functional, high integration is the design's large characteristics.
In electronic technology, frequency is one of the most basic parameter, and again with all right very close relationship of measurement scheme, the measurement result of many electric parameters, so the measurement of frequency just seems particularly important.
In traditional electronic measuring instrument, oscillograph is not convenient when carrying out frequency measurement.Frequency spectrograph is survey frequency and show the frequency spectrum of measured signal accurately, but measuring speed is slower, and trace trap that can't be real-time is to the variation of measured signal frequency.
Summary of the invention
The purpose of this invention is to provide a kind of digital display type frequency meter, so that it is simple in structure, the measuring speed piece, and measurement is more convenient.
The object of the present invention is achieved like this: a kind of digital display type frequency meter, comprise time base circuit, the signal output part of time base circuit links to each other with the signal input part of control circuit module, the signal output part of control circuit module links to each other with the signal input part of computing circuit, and the output terminal of computing circuit links to each other with display unit.
As improvement of the present invention, described time base circuit adopts 555 timers as master chip.
As improvement of the present invention, described control circuit module comprises control circuit part and gate circuit part.
As improvement of the present invention, described computing circuit comprises counting unit, latch units, decoding unit and driver element.
As improvement of the present invention, described display unit is selected seven sections LED charactrons.
When the present invention works, time base circuit is that basic pulse produces circuit, its send pulse signal as control signal to control circuit, be provided with CPU addition input end and CPD subtraction input end on the control circuit, when control circuit detects measured signal input CPU end, counter is done additive operation, when control circuit detects measured signal input CPD end, counter is done subtraction, still be provided with the carry output terminal in the control circuit, when counter was made full 10 number of plus coujnt, the carry output terminal was exported a pulse, thereby finished the counting of frequency.Compared with prior art, beneficial effect of the present invention is: it is simple in structure in the present invention, the measuring speed piece, and measure more convenient.The present invention can be used for the occasion of tight survey frequency.
Description of drawings
Fig. 1 is principle of work block diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
A kind of digital display type frequency meter shown in Fig. 1-2, comprise time base circuit, the signal output part of time base circuit links to each other with the signal input part of control circuit module, the signal output part of control circuit module links to each other with the signal input part of computing circuit, the output terminal of computing circuit links to each other with display unit, time base circuit adopts 555 timers as master chip, the control circuit module comprises control circuit part and gate circuit part, computing circuit comprises counting unit, latch units, decoding unit and driver element, and display unit is selected seven sections LED charactrons.
When the present invention works, time base circuit is that basic pulse produces circuit, it sends pulse signal to control circuit, be provided with CPU addition input end and CPD subtraction input end on the control circuit, when control circuit detects pulse signal input CPU end, counter is done additive operation, when control circuit detects pulse signal input CPD end, counter is done subtraction, still be provided with the carry output terminal in the control circuit, when counter was made full 10 number of plus coujnt, the carry output terminal was exported a pulse, thereby finished the counting of frequency.So that it is simple in structure, the measuring speed piece, and measurement is more convenient.
The present invention is not limited to above-described embodiment; on the basis of technical scheme disclosed by the invention; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection scope of the present invention.
Claims (5)
1. digital display type frequency meter, it is characterized in that, comprise time base circuit, the signal output part of time base circuit links to each other with the signal input part of control circuit module, the signal output part of control circuit module links to each other with the signal input part of computing circuit, and the output terminal of computing circuit links to each other with display unit.
2. a kind of digital display type frequency meter according to claim 1 is characterized in that, described time base circuit adopts 555 timers as master chip.
3. a kind of digital display type frequency meter according to claim 1 and 2 is characterized in that, described control circuit module comprises control circuit part and gate circuit part.
4. a kind of digital display type frequency meter according to claim 1 and 2 is characterized in that described computing circuit comprises counting unit, latch units, decoding unit and driver element.
5. a kind of digital display type frequency meter according to claim 1 and 2 is characterized in that, described display unit is selected seven sections LED charactrons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110265972 CN102981051A (en) | 2011-09-05 | 2011-09-05 | Digital display type frequency meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110265972 CN102981051A (en) | 2011-09-05 | 2011-09-05 | Digital display type frequency meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102981051A true CN102981051A (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110265972 Pending CN102981051A (en) | 2011-09-05 | 2011-09-05 | Digital display type frequency meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102981051A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954835A (en) * | 2014-03-25 | 2014-07-30 | 苏州经贸职业技术学院 | Frequency display apparatus and work method thereof |
| CN105785122A (en) * | 2016-05-24 | 2016-07-20 | 南宁市茂百科技有限公司 | Digital cymometer |
-
2011
- 2011-09-05 CN CN 201110265972 patent/CN102981051A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954835A (en) * | 2014-03-25 | 2014-07-30 | 苏州经贸职业技术学院 | Frequency display apparatus and work method thereof |
| CN105785122A (en) * | 2016-05-24 | 2016-07-20 | 南宁市茂百科技有限公司 | Digital cymometer |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130320 |