CN203732624U - Single-phase digital frequency measuring instrument based on AT89C52 chip - Google Patents
Single-phase digital frequency measuring instrument based on AT89C52 chip Download PDFInfo
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- CN203732624U CN203732624U CN201320892138.8U CN201320892138U CN203732624U CN 203732624 U CN203732624 U CN 203732624U CN 201320892138 U CN201320892138 U CN 201320892138U CN 203732624 U CN203732624 U CN 203732624U
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- microprocessor
- measuring instrument
- digital frequency
- instrument
- processing module
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Abstract
The utility model discloses a single-phase digital frequency measuring instrument based on an AT89C52 chip. The instrument comprises a signal input module, an operational amplifier processing module, a microprocessor, and a display module. Acquired voltage signals are transmitted to the operational amplifier processing module through a mutual inductor of the input module. The operational amplifier processing module outputs square wave signals to the microprocessor. The microprocessor outputs waveform figures to the display module. The microprocessor is an AT89C52 single-chip microcomputer chip. The instrument circuit of the single-phase digital frequency measuring instrument is modularized, and the measuring instrument is suitable for various electrical circuits. Versatility and practicality of the measuring instrument are good, and volume is small, thereby greatly saving space. The measuring instrument is clever in design, and convenient in installation, and the circuit of the instrument is high in precision, good in stability, and high in reliability. The circuit is concise, and production and manufacturing are easy. An ISP method is used, so that modification of software is convenient.
Description
Technical field
The utility model relates to a kind of SCM Based DIGITAL FREQUENCY measurement instrument.
Background technology
Along with the development of microelectric technique and computer technology, smart instrumentation is widely used in every field, more and more has multi-functional measurement instrument and is flooded with market, and relative product function is directly proportional to price.Client's demand is various, and nowadays most measurement instrument is all toward intelligent, multi-functional, the advanced trend development of structure, but but ignored, the most basic some price is high, its tangible a lot of occasions be all need to be the most basic simple function.
Well-known power supply is one of topmost core component of measurement instrument, is the parts that instrument can not lack, and this has just increased the manufacturing cost that instrument is produced virtually, and has increased the volume of instrument product.
Utility model content
Technical problem to be solved in the utility model be realize a kind of structure simplify small and exquisite, easy to use and reliable, and the lower one-phase digital frequency measurement instrument of manufacturing cost.
To achieve these goals, the technical solution adopted in the utility model is: a kind of one-phase digital frequency measurement instrument based on AT89C52 chip, instrument comprises signal input module, amplifier processing module, microprocessor and display module, the voltage signal gathering is delivered to amplifier processing module through the mutual inductor of load module, described amplifier processing module output square-wave signal is to microprocessor, described microprocessor output waveform figure is to display module, and described microprocessor is AT89C52 singlechip chip.
Described amplifier processing module comprises the comparer that to form waveform transformation be square wave by amplifier LM358.
Described display module is charactron.
The watch circuit modularization of the utility model one-phase digital frequency measuring instrument, applicable various electric wiring, versatility and practicality are stronger, and volume is little, greatly save space, design ingeniously, easy for installation, the circuit precision of instrument is high, good stability, reliability are high, simple circuit understands simultaneously, be convenient to manufacture, and adopt ISP online programmable mode, facilitate software modification.
Brief description of the drawings
Below the mark in content and figure that in the utility model instructions, every width accompanying drawing is expressed is briefly described:
Fig. 1 is instrument hardware system structure figure;
Fig. 2 is instrument electric quantity acquisition and handling principle block diagram;
Fig. 3 is instrument main program flow chart.
Embodiment
Known referring to Fig. 1, one-phase digital frequency measurement instrument comprises signal input module 1, amplifier processing module 2, microprocessor 3 and display module 4, wherein load module 1 comprises the mutual inductor that gathers tested voltage, amplifier processing module 2 comprises by amplifier LM358 and forms comparer, microprocessor 3 adopts AT89C52 singlechip chip, and display module 4 adopts charactron.
Known referring to Fig. 2, first tested voltage sample by voltage transformer (VT), the secondary current of mutual inductor is after resistance sampling, the comparer forming through amplifier LM358 afterwards is after filtering square wave by waveform transformation, square wave is delivered to microprocessor 3, and AT89C52 singlechip chip is by square wave is sampled, the side of calculating wave period, thereby can calculate frequency, and send to after treatment charactron to show measured value.
Fig. 3 is instrument main program flow chart, and its software section is mainly responsible for the processing, demonstration, execution real-time task etc. of data, the functions such as software systems mainly comprise system initialization, interrupt processing, demonstration in real time.Job step is as follows: step 1 is for starting action, and step 2 is initialization action, i.e. the definition of microprocessor input/output port, interrupt register, global variable, timer 0, timer 1 etc. carry out initialization.In step 3, judged whether interruption, if so, enter step 4 and carry out interruption subroutine, if NO or execution of step 3 enter step 5 and carry out microprocessor, calculate the value of frequency.In step 6, the numerical value of the frequency calculating is shown, return to 3 circulations and carry out this system program.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously the utility model specific implementation is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection domain of the present utility model.
Claims (3)
1. the one-phase digital frequency measurement instrument based on AT89C52 chip, it is characterized in that: instrument comprises signal input module (1), amplifier processing module (2), microprocessor (3) and display module (4), the voltage signal gathering is delivered to amplifier processing module (2) through the mutual inductor of load module (1), described amplifier processing module (2) output square-wave signal is to microprocessor (3), described microprocessor (3) output waveform figure is to display module (4), and described microprocessor (3) is AT89C52 singlechip chip.
2. the one-phase digital frequency measurement instrument based on AT89C52 chip according to claim 1, is characterized in that: described amplifier processing module (2) comprises the comparer that to form waveform transformation be square wave by amplifier LM358.
3. the one-phase digital frequency measurement instrument based on AT89C52 chip according to claim 1 and 2, is characterized in that: described display module (4) is charactron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892138.8U CN203732624U (en) | 2013-12-31 | 2013-12-31 | Single-phase digital frequency measuring instrument based on AT89C52 chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892138.8U CN203732624U (en) | 2013-12-31 | 2013-12-31 | Single-phase digital frequency measuring instrument based on AT89C52 chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203732624U true CN203732624U (en) | 2014-07-23 |
Family
ID=51202686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320892138.8U Expired - Fee Related CN203732624U (en) | 2013-12-31 | 2013-12-31 | Single-phase digital frequency measuring instrument based on AT89C52 chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203732624U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269920A (en) * | 2014-08-07 | 2015-01-07 | 安徽鑫龙电器股份有限公司 | Power distribution network automation monitoring terminal device |
-
2013
- 2013-12-31 CN CN201320892138.8U patent/CN203732624U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269920A (en) * | 2014-08-07 | 2015-01-07 | 安徽鑫龙电器股份有限公司 | Power distribution network automation monitoring terminal device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20161231 |