CN202939204U - Measuring meter for measuring current and voltage values - Google Patents
Measuring meter for measuring current and voltage values Download PDFInfo
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- CN202939204U CN202939204U CN 201220627603 CN201220627603U CN202939204U CN 202939204 U CN202939204 U CN 202939204U CN 201220627603 CN201220627603 CN 201220627603 CN 201220627603 U CN201220627603 U CN 201220627603U CN 202939204 U CN202939204 U CN 202939204U
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Abstract
The utility model 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. With such a structure, the measuring meter has the advantages that 1) demands of a majority of users for basic measurement of currents and voltages are met; 2) the size is small, the space is saved, and the installation is convenient; 3) the stability is good, and the measurement accuracy is high; and 4) the circuit is concise and clear, and the production is easy.
Description
Technical field
The utility model relates to a kind of for measuring the measurement instrument of 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, for the needed function of different field disparity items, is but different, 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, meeting most of users is the problem that the prior art needs solve for the fundamental measurement of electric current and voltage.
The utility model content
Technical problem to be solved in the utility model is, provides a kind of for measuring the measurement instrument of electric current and magnitude of voltage, with relatively low cost, meets the purpose of most of users for the fundamental measurement of electric current and voltage.
For solving the problems of the technologies described above, the technical solution of the utility model is, a kind of for measuring the measurement instrument of 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 current-voltage transformer is input to the signal input pin of measuring chip after filtering afterwards, microprocessor reads the measured value of measuring chip by the SPI interface, and measured value is passed to display chip after treatment drive charactron to be shown, thereby realize the 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, makes measurement more accurate.
A kind of for measuring the measurement instrument of electric current and magnitude of voltage, owing to adopting the foregoing circuit structure, this measurement instrument has the following advantages: 1, with relatively low cost, meet the fundamental measurement of most of users for electric current and voltage; 2, volume is little, has saved space, easy for installation; 3, good stability, measuring accuracy is high; 4, simple circuit understands, easily produces.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail;
Fig. 1 is a kind of structured flowchart for the measurement instrument of measuring electric current and magnitude of voltage of the utility model;
Fig. 2 is a kind of software flow pattern for the measurement instrument of measuring electric current and magnitude of voltage of the utility model;
Fig. 3 is a kind of initialization flowchart for the measurement instrument software of measuring electric current and magnitude of voltage of the utility model;
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 utility model is that measuring-signal 4 is input to current-voltage transformer 3, sampled signal on current-voltage transformer 3 is input to the signal input pin of measuring chip 2 after filtering afterwards, 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 to be shown, thereby realize the 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, make measurement more accurate.
Wherein, the model of microprocessor is STC12C5A32AD; The model of measuring chip is CS5463; The model of display chip is 74HC595D.
The utility model is mainly by signal input module, the signal sampling module, microprocessor, with compositions such as display modules, core microprocessor 1 adopts the STC12C5A32AD singlechip chip, the elements such as the model of measuring chip 2 is CS5463, tested curtage is at first by current-voltage transformer 3 Gather and input signals, the signal of resistance up-sampling is input to the signal input pin of measuring chip 2 after filtering afterwards, STC12C5A32AD reads the measured value of measuring chip 2 by the SPI interface, and send to after treatment display chip 74HC595D to drive charactron to be shown measured value.
Software section of the present utility model 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, demonstration in real time.
As shown in Figure 2, step 1 is for starting action, and step 2 is initialization action, and the definition of microprocessor 1 input/output port, computation chip, interrupt register, global variable, timer 0, timer 1 etc. carry out initialization.Judged whether interruption in step 3, if, enter step 4 and carry out interruption subroutine, if NO or execution of step 3 enter step 5 and read computation chip value and the value of reading is carried out to the data processing, in step 6, the numerical value of the real-time measurement of reading is shown, return to 3 circulations and carry out this system program.
The effect of initialize routine is defined 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 starting action, and in step 10, at first each pin of I/O to microprocessor is defined, and in step 11, the function of timer 0,1 is defined and the initialize, in step 12, to measuring chip 2, and display chip 5 carries out initialization.Read the proof test value of computation chip etc. in step 13, these values are stored in corresponding register simultaneously from EEPROM.The priority of interruption is set in step 14 and opens interruption, finally to entering step 15 master routine.
The above is exemplarily described the utility model by reference to the accompanying drawings; obviously the utility model specific implementation is not subject to the restrictions described above; as long as the various improvement that adopted technical solutions of the utility model to carry out; or directly apply to other occasion without improvement, all within protection domain of the present utility model.
Claims (5)
1. one kind for measuring the measurement instrument of 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 current-voltage transformer (3) is input to the signal input pin of measuring chip (2) after filtering afterwards, 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) to be shown.
2. according to claim 1 a kind of for measuring the measurement instrument of electric current and magnitude of voltage, it is characterized in that: the model of described microprocessor (1) is STC12C5A32AD.
3. according to claim 1 a kind of for measuring the measurement instrument of electric current and magnitude of voltage, it is characterized in that: the model of described measurement chip (2) is CS5463.
4. according to claim 1 a kind of for measuring the measurement instrument of electric current and magnitude of voltage, it is characterized in that: the model of described display chip (5) is 74HC595D.
5. according to claim 1 a kind of for measuring the measurement instrument of electric current and magnitude of voltage, it is characterized in that: described measurement instrument is provided with toggle switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220627603 CN202939204U (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 |
|---|---|---|---|
| CN 201220627603 CN202939204U (en) | 2012-11-23 | 2012-11-23 | Measuring meter for measuring current and voltage values |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939204U true CN202939204U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220627603 Expired - Fee Related CN202939204U (en) | 2012-11-23 | 2012-11-23 | Measuring meter for measuring current and voltage values |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939204U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981034A (en) * | 2012-11-23 | 2013-03-20 | 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 CN 201220627603 patent/CN202939204U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981034A (en) * | 2012-11-23 | 2013-03-20 | 安徽鑫龙电器股份有限公司 | Measuring meter for measuring current and voltage values |
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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: 20130515 Termination date: 20161123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |