CN102981034A - Measuring meter for measuring current and voltage values - Google Patents
Measuring meter for measuring current and voltage values Download PDFInfo
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- CN102981034A CN102981034A CN2012104825894A CN201210482589A CN102981034A CN 102981034 A CN102981034 A CN 102981034A CN 2012104825894 A CN2012104825894 A CN 2012104825894A CN 201210482589 A CN201210482589 A CN 201210482589A CN 102981034 A CN102981034 A CN 102981034A
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Abstract
The invention discloses a measuring meter for measuring current and voltage values. The measuring meter is characterized in that measurement signals are input to a current and voltage transformer, sampled signals on the current and voltage transformer are input to a signal input pin of a measurement chip after being filtered, a microprocessor reads a measurement value of the measurement chip through a serial peripheral interface (SPI), and the measurement value is sent to a display chip drive digital tube for display after being processed. As the structure is used, the measuring meter has the advantages that demands of a majority of users for basic measurement of currents and voltages are met; the size is small, the space is saved, and the installation is convenient; the stability is good, and the measurement accuracy is high; and the circuit is concise and clear, and the production is easy.
Description
Technical field
The present invention relates to a kind of measurement instrument for measuring electric current and magnitude of voltage.
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 multivalence lattice are just high.Client's demand is various, but is different for the needed function of different field disparity items, and nowadays most measurement instrument is all toward intelligent, multi-functional, the advanced trend development of structure.
But need the most basic functional measurement curtage a lot of occasion clients.High instrument just is used to measuring voltage and electric current, and this forms a kind of waste virtually, is unfavorable for saving production cost.
Develop the relatively low measurement instrument of a kind of cost for above-mentioned situation, satisfying most of users is the problem that the prior art needs solve for the fundamental measurement of electric current and voltage.
Summary of the invention
Technical matters to be solved by this invention is, a kind of measurement instrument for measuring electric current and magnitude of voltage is provided, and satisfies most of users for the purpose of the fundamental measurement of electric current and voltage with relatively low cost.
For solving the problems of the technologies described above, technical scheme of the present invention is, a kind of measurement instrument for measuring electric current and magnitude of voltage, it is characterized in that: described measurement instrument is that measuring-signal is input to current-voltage transformer, sampled signal on the current-voltage transformer is through being input to the signal input pin of measuring chip after the filtering, microprocessor reads the measured value of measuring chip by the SPI interface, and measured value is passed to display chip after treatment drive charactron and show, thereby realize measurement to electric current and voltage.
The model of described microprocessor is STC12C5A32AD.
The model of described measurement chip is CS5463.
The model of described display chip is 74HC595D.
Described measurement instrument is provided with toggle switch, in order to adjust the no-load voltage ratio of electric current, so that measurement is more accurate.
A kind of measurement instrument for measuring electric current and magnitude of voltage, owing to adopt the foregoing circuit structure, this measurement instrument has the following advantages: 1, satisfy most of users for the fundamental measurement of electric current and voltage with relatively low cost; 2, volume is little, has saved the space, and is easy for installation; 3, good stability, measuring accuracy is high; 4, simple circuit understands, produces easily.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments;
Fig. 1 is the structured flowchart of a kind of measurement instrument for measuring electric current and magnitude of voltage of the present invention;
Fig. 2 is the software flow pattern of a kind of measurement instrument for measuring electric current and magnitude of voltage of the present invention;
Fig. 3 is the initialization flowchart of a kind of measurement instrument software for measuring electric current and magnitude of voltage of the present invention;
In Fig. 1,1, microprocessor; 2, measure chip; 3, current-voltage transformer; 4, measuring-signal; 5, display chip; 6, charactron.
Embodiment
As shown in Figure 1, the present invention is that measuring-signal 4 is input to current-voltage transformer 3, sampled signal on the current-voltage transformer 3 is through being input to the signal input pin of measuring chip 2 after the filtering, microprocessor 1 reads the measured value of measuring chip 2 by the SPI interface, and measured value is passed to display chip 5 after treatment drive charactrons 6 and show, thereby realize measurement to electric current and voltage.And measurement instrument is provided with toggle switch, in order to adjust the no-load voltage ratio of electric current, so that measurement is more accurate.
Wherein, the model of microprocessor is STC12C5A32AD; The model of measuring chip is CS5463; The model of display chip is 74HC595D.
The present invention mainly is by signal input module, the signal sampling module, microprocessor, with compositions such as display modules, core microprocessor 1 adopts the STC12C5A32AD singlechip chip, the model of measuring chip 2 is the elements such as CS5463, tested curtage is at first by current-voltage transformer 3 Gather and input signals, the signal of resistance up-sampling is through being input to the signal input pin of measuring chip 2 after the filtering, STC12C5A32AD reads the measured value of measuring chip 2 by the SPI interface, and measured value is sent to display chip 74HC595D after treatment drives charactron and show.
Software section of the present invention mainly is responsible for the processing, demonstration, execution real-time task of data etc., the functions such as software systems mainly comprise system initialization, interrupt processing, in real time demonstration.
As shown in Figure 2, step 1 is for beginning action, and step 2 is initialization action, and namely the definition of microprocessor 1 input/output port, computation chip, interrupt register, global variable, timer 0, timer 1 etc. carry out initialization.In step 3, judged whether interruption, if, then enter step 4 and carry out interruption subroutine, if NO or execution of step 3 enter step 5 and read the computation chip value and the value of reading is carried out data process, in step 6, the Real-time Measuring numberical value of quantity of reading is shown, return 3 circulations and carry out this system program.
The effect of initialize routine defines the I/O pin function of microprocessor 1, timer 0,1 initialization assignment, electric weight chip proof test value.As shown in Figure 3, step 9 is for beginning action, and at first each pin of I/O to microprocessor defines in step 10, in step 11 timer 0,1 function is defined and initialize, to measuring chip 2, and display chip 5 carries out initialization in step 12.In step 13, from EEPROM, read the proof test value of computation chip etc., simultaneously these values are stored in the corresponding register.The priority of interruption is set in step 14 and opens interruption, at last to entering step 15 master routine.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted technical solution of the present invention to carry out, or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (5)
1. measurement instrument of be used for measuring electric current and magnitude of voltage, it is characterized in that: described measurement instrument is that measuring-signal (4) is input to current-voltage transformer (3), sampled signal on the current-voltage transformer (3) is through being input to the signal input pin of measuring chip (2) after the filtering, microprocessor (1) reads the measured value of measuring chip (2) by the SPI interface, and measured value is passed to display chip (5) after treatment drives charactron (6) and show.
2. a kind of measurement instrument for measuring electric current and magnitude of voltage according to claim 1, it is characterized in that: the model of described microprocessor (1) is STC12C5A32AD.
3. a kind of measurement instrument for measuring electric current and magnitude of voltage according to claim 1, it is characterized in that: the model of described measurement chip (2) is CS5463.
4. a kind of measurement instrument for measuring electric current and magnitude of voltage according to claim 1, it is characterized in that: the model of described display chip (5) is 74HC595D.
5. a kind of measurement instrument for measuring electric current and magnitude of voltage according to claim 1, it is characterized in that: described measurement instrument is provided with toggle switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104825894A CN102981034A (en) | 2012-11-23 | 2012-11-23 | Measuring meter for measuring current and voltage values |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104825894A CN102981034A (en) | 2012-11-23 | 2012-11-23 | Measuring meter for measuring current and voltage values |
Publications (1)
| Publication Number | Publication Date |
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| CN102981034A true CN102981034A (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104825894A Pending CN102981034A (en) | 2012-11-23 | 2012-11-23 | Measuring meter for measuring current and voltage values |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0121568B1 (en) * | 1994-11-25 | 1997-12-04 | 배순훈 | Current/voltage test circuit in circuit tester |
| CN1542456A (en) * | 2003-11-07 | 2004-11-03 | 大连理工大学 | Current measuring method |
| CN101514999A (en) * | 2008-12-15 | 2009-08-26 | 安徽鑫龙电器股份有限公司 | Electric power measurement multifunctional instrument system and method for measurement |
| CN101699298A (en) * | 2009-11-12 | 2010-04-28 | 安徽鑫龙电器股份有限公司 | One-phase digital current/voltage measuring instrument and measuring method thereof |
| CN102353828A (en) * | 2011-09-29 | 2012-02-15 | 安徽鑫龙电器股份有限公司 | Combination instrument for measuring single-phase voltage and single-phase current as well as measuring method thereof |
| CN202939204U (en) * | 2012-11-23 | 2013-05-15 | 安徽鑫龙电器股份有限公司 | Measuring meter for measuring current and voltage values |
-
2012
- 2012-11-23 CN CN2012104825894A patent/CN102981034A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0121568B1 (en) * | 1994-11-25 | 1997-12-04 | 배순훈 | Current/voltage test circuit in circuit tester |
| CN1542456A (en) * | 2003-11-07 | 2004-11-03 | 大连理工大学 | Current measuring method |
| CN101514999A (en) * | 2008-12-15 | 2009-08-26 | 安徽鑫龙电器股份有限公司 | Electric power measurement multifunctional instrument system and method for measurement |
| CN101699298A (en) * | 2009-11-12 | 2010-04-28 | 安徽鑫龙电器股份有限公司 | One-phase digital current/voltage measuring instrument and measuring method thereof |
| CN102353828A (en) * | 2011-09-29 | 2012-02-15 | 安徽鑫龙电器股份有限公司 | Combination instrument for measuring single-phase voltage and single-phase current as well as measuring method thereof |
| CN202939204U (en) * | 2012-11-23 | 2013-05-15 | 安徽鑫龙电器股份有限公司 | Measuring meter for measuring current and voltage values |
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Application publication date: 20130320 |