CN207135084U - A kind of AD conversion mode realizes the circuit of on-off model detection - Google Patents
A kind of AD conversion mode realizes the circuit of on-off model detection Download PDFInfo
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- CN207135084U CN207135084U CN201721033617.9U CN201721033617U CN207135084U CN 207135084 U CN207135084 U CN 207135084U CN 201721033617 U CN201721033617 U CN 201721033617U CN 207135084 U CN207135084 U CN 207135084U
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Abstract
The utility model provides the circuit that a kind of AD conversion mode realizes on-off model detection, series circuit including first resistor and second resistance, A/D change-over circuits, processor, one end connecting valve amount signal input interface of first resistor and second resistance series circuit, the other end is grounded, A/D change-over circuits one end is connected between first resistor and second resistance, other end connection processor.Threshold voltage scope of the present utility model can be set by processor, have very strong flexibility, meanwhile, the utility model can carry out self-test to circuit simultaneously.
Description
Technical field
A kind of switching quantity detection circuit is the utility model is related to, more particularly to a kind of A/D conversion regimes realize that switching value is believed
Number detection circuit.
Background technology
Traditional switching value method, it is that switch amount signal level range carries out qualitative detection.General provision is more than
High threshold voltage（Such as 0.7 times of maximum level）High level is divided into, less than low threshold voltage（Such as the 0.3 of maximum level
Times）Divide into low level.When incoming level is between high-low threshold voltage（For example it is less than 0.7 times more than 0.3 times）, circuit
It cannot be distinguished by, noise can only be considered as.
Utility model content
The shortcomings that based on above-mentioned prior art, the utility model provide a kind of A/D conversion regimes and realize that on-off model is examined
The circuit of survey, to solve the problems, such as that prior art is present.
The utility model uses following technical scheme：
A kind of A/D conversion regimes realize the circuit of on-off model detection, including first resistor R1 and second resistance R2
One end connecting valve amount letter of series circuit, A/D change-over circuits, processor, first resistor R1 and second resistance R2 series circuits
Number input interface, other end ground connection, A/D change-over circuits one end are connected between first resistor R1 and second resistance R2, the other end
Connect processor.
Also include the first diode D1 being arranged between series resistance and on-off model, the first diode D1 positive pole
Connecting valve amount signal output apparatus, the first diode D1 negative pole connection first resistor R1 and second resistance R2 series circuit
One end.
Positive pole connection processor also including the second diode D2, the second diode D2, negative pole connect the one or two pole
Pipe D1 negative pole end.
The processor is the CPU with memory.
The beneficial effects of the utility model：Threshold voltage scope of the present utility model can be set by processor, be had very strong
Flexibility, meanwhile, the utility model can simultaneously to circuit carry out self-test.
Brief description of the drawings
Fig. 1 is circuit structure diagram of the present utility model.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, the utility model provides the circuit that a kind of A/D conversion regimes realize on-off model detection, can
Realize the voltage measurement in the range of on-off model full level.
The circuit includes first resistor R1 and second resistance R2 series circuit, A/D change-over circuits, processor, the first electricity
One end, i.e. one end connecting valve amount signal output apparatus of first resistor R1 of R1 and second resistance R2 series circuit are hindered, separately
One end, i.e. second resistance R2 one end ground connection, A/D change-over circuits one end are connected between first resistor R1 and second resistance R2,
The other end connection processor of A/D change-over circuits.
Processor may be selected to be the CPU with memory.
When carrying out on-off model detection, on-off model passes through first resistor R1 and second resistance R2, due to the second electricity
Hinder R2 ground connection, A/D change-over circuits obtain second resistance R2 voltage, and the voltage of acquisition is transferred into processor, processor according to
Input switch amount signal level is calculated in the voltage, according to default high-low threshold voltage range, distinguishes input switch amount
The level height of signal, and be abnormal signal for the signal record between high-low threshold voltage.
It is above-mentioned input switch amount signal level is calculated by processor method be：A/D sampled voltages are equal to resistance R2
On voltage, be designated as VR2；Then input switch amount signal level is：VR2 *(R1+R2)/R2+VD1。
Foregoing circuit also includes the first diode D1, the first diode D1 positive pole connecting valve amount signal output apparatus,
One end of first diode D1 negative pole connection first resistor R1 and second resistance R2 series circuit.I.e. on-off model passes through
First diode D1 is applied on first resistor R1 and second resistance R2, and A/D change-over circuits are again to the voltage on second resistance R2
It is acquired.By setting the first diode D1, it can prevent that input signal is reversed.
The circuit can also carry out the self-test of A/D change-over circuits, and circuit of the present utility model also includes the second diode D2,
Second diode D2 positive pole connection processor, negative pole connect the first diode D1 negative pole end and first resistor R1 one end.
Second diode D2 can isolate self-test signal and the on-off model of input.
Processor sends self-test signal from the second diode D2, and self-test signal is applied into sampling resistor：First resistor R1
The self-test signal is obtained on second resistance R2, while by A/D change-over circuits, self-test signal is then passed into CPU, CPU
The self-test signal of reception and the self-test signal sent are contrasted, if both data are the same or difference range in permission
Interior, then circuit fault-free of the explanation from sampling resistor to A/D change-over circuits, otherwise faulty, and then realizes from first resistor R1
To the self-test of A/D change-over circuits.
Threshold voltage scope of the present utility model can be set according to different external conditions by communication mode by processor, tool
There is very strong flexibility.
The utility model can realize the voltage measurement in the range of on-off model full level.
Above-described is only preferred embodiment of the present utility model, it is noted that for those skilled in the art
For, under the premise of the utility model general idea is not departed from, some changes and improvements can also be made, these should also be considered as
The scope of protection of the utility model.
Claims (4)
1. a kind of AD conversion mode realizes the circuit of on-off model detection, it is characterised in that：Including first resistor（R1）With
Two resistance（R2）Series circuit, A/D change-over circuits, processor, first resistor（R1）And second resistance（R2）Series circuit
One end connecting valve amount signal input interface, other end ground connection, A/D change-over circuits one end is connected to first resistor（R1）With second
Resistance（R2）Between, other end connection processor.
2. a kind of AD conversion mode according to claim 1 realizes the circuit of on-off model detection, it is characterised in that：Also
Including the first diode being arranged between series resistance and on-off model（D1）, the first diode（D1）Positive pole connection open
Measure signal output apparatus, the first diode in pass（D1）Negative pole connection first resistor（R1）And second resistance（R2）Series circuit
One end.
3. a kind of AD conversion mode according to claim 1 realizes the circuit of on-off model detection, it is characterised in that：Also
Including the second diode（D2）, second diode（D2）Positive pole connection processor, negative pole connect the first diode（D1）
Negative pole end.
4. a kind of AD conversion mode according to claim 1 realizes the circuit of on-off model detection, it is characterised in that：Institute
It is the CPU with memory to state processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721033617.9U CN207135084U (en) | 2017-08-17 | 2017-08-17 | A kind of AD conversion mode realizes the circuit of on-off model detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721033617.9U CN207135084U (en) | 2017-08-17 | 2017-08-17 | A kind of AD conversion mode realizes the circuit of on-off model detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207135084U true CN207135084U (en) | 2018-03-23 |
Family
ID=61635278
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721033617.9U Active CN207135084U (en) | 2017-08-17 | 2017-08-17 | A kind of AD conversion mode realizes the circuit of on-off model detection |
Country Status (1)
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| CN (1) | CN207135084U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406862A (en) * | 2018-12-11 | 2019-03-01 | 广西玉柴机器股份有限公司 | A kind of switching quantity detection circuit of compatible height significant level |
| CN109709863A (en) * | 2019-01-05 | 2019-05-03 | 深圳市合信达控制系统有限公司 | A kind of port AD self-checking circuit, single-chip microcontroller and the water heater of single-chip microcontroller |
| CN112857427A (en) * | 2021-01-04 | 2021-05-28 | 柳州柳新汽车冲压件有限公司 | Mold signal detection circuit and device based on automation |
-
2017
- 2017-08-17 CN CN201721033617.9U patent/CN207135084U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406862A (en) * | 2018-12-11 | 2019-03-01 | 广西玉柴机器股份有限公司 | A kind of switching quantity detection circuit of compatible height significant level |
| CN109406862B (en) * | 2018-12-11 | 2023-09-19 | 广西玉柴机器股份有限公司 | Switching value detection circuit compatible with high and low effective levels |
| CN109709863A (en) * | 2019-01-05 | 2019-05-03 | 深圳市合信达控制系统有限公司 | A kind of port AD self-checking circuit, single-chip microcontroller and the water heater of single-chip microcontroller |
| CN109709863B (en) * | 2019-01-05 | 2024-03-08 | 深圳市合信达控制系统有限公司 | AD port self-checking circuit of singlechip, singlechip and water heater |
| CN112857427A (en) * | 2021-01-04 | 2021-05-28 | 柳州柳新汽车冲压件有限公司 | Mold signal detection circuit and device based on automation |
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