CN202141779U - Data acquisition circuit - Google Patents
Data acquisition circuit Download PDFInfo
- Publication number
- CN202141779U CN202141779U CN201120251543U CN201120251543U CN202141779U CN 202141779 U CN202141779 U CN 202141779U CN 201120251543 U CN201120251543 U CN 201120251543U CN 201120251543 U CN201120251543 U CN 201120251543U CN 202141779 U CN202141779 U CN 202141779U
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- pole double
- current source
- circuit
- spdt
- data acquisition
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Abstract
The utility model relates to a data acquisition circuit, belonging to the technical field of an electronic circuit. The circuit comprises a current source (1), a single chip microcomputer (2), several sensors, and several single-pole double-throw switches, wherein the sensors (3,4,5) and the single-pole double-throw switches (6,7) are intervally arranged, serially connected to the current source, and connected to the single chip microcomputer, the sensors are serially connected to one ends of the single-pole double-throw switches, and the other ends of the single-pole double-throw switches are connected to a ground wire (8). The data acquisition circuit solves problems in practical use by detecting the voltage of a resistor serially connected with the current source circuit, can accurately and rapidly detect the faults and emergently alarm, and also can know the positions of faults. The method is fast, accurate and reliable.
Description
Technical field
The utility model relates to a kind of circuit of data acquisition, belongs to the electronic circuit technology field.
Background technology
Underworkings has large-scale running devices such as many belts, monkey car in the colliery, need carry out real-time detection to it and guarantee its safe operation, and running into emergency condition must report to the police at once, very high to the real-time reliability requirement.Also do not have a kind of good method to solve this problem at present, have and use communication modes, but real-time is poor, can not satisfy actual needs.A lot of sensor sideslips or backguy or the like are arranged in the time of the belt running; Because Belt Length differs; How accurately and rapidly what have reaches thousands of rice, just needs a lot of sensors carry out safety detection along the line, still detection failure emergency alarm; And it is very crucial that the position that can also know fault generating just seems, also is the technical matters that this area needs to be resolved hurrily.
The utility model content
The utility model purpose provides a kind of circuit of data acquisition, detection failure emergency alarm accurately and rapidly, and can also know and the position of fault generating solve the problems referred to above that exist in the background technology.
The technical scheme of the utility model is: a kind of circuit of data acquisition; Comprise current source, single-chip microcomputer, plurality of sensors, several single-pole double-throw switch (SPDT)s; Sensor and single-pole double-throw switch (SPDT) separation are serially connected on the current source, and connect single-chip microcomputer; Sensor string is connected on the end of single-pole double-throw switch (SPDT), and the other end of single-pole double-throw switch (SPDT) connects ground wire.
The utility model is to utilize the current source circuit resistance in series to detect voltage method to solve the problem in the practical application.
Press different single-pole double-throw switch (SPDT)s, the sensor number that is connected in the circuit changes, and the resistance number of current source connection just changes; So the voltage that current source produces also changes thereupon; Also by fixedly rule variation, if certain single-pole double-throw switch (SPDT) of sensor is pressed, whole piece circuit total voltage is added on the AD passage of single-chip microcomputer the voltage that sensor produces; Just can failure judgement through real-time collection voltage signal; And accurately judge the position of fault generating, the method speed is fast, accurately and reliably.
Said current source model is LM334 three end adjustable constant-flow source devices, the three end adjustable constant-flow source devices that National Semiconductor produces; The single-chip microcomputer model is STC12C5A08S2.
The good effect of the utility model is: the utility model is to utilize the current source circuit resistance in series to detect voltage method to solve the problem in the practical application; Detection failure emergency alarm accurately and rapidly; And can also know the position of fault generating, the method speed is fast, accurately and reliably.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment;
Accompanying drawing 2 is the utility model embodiment schematic diagrams;
Among the figure: current source 1, single-chip microcomputer 2, sensor 3,4,5, single-pole double-throw switch (SPDT) 6,7, ground wire 8.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further through embodiment.
Among the embodiment; A kind of circuit of data acquisition comprises current source 1, single-chip microcomputer 2, plurality of sensors, several single-pole double-throw switch (SPDT)s, sensor 3,4,5 and single-pole double-throw switch (SPDT) 6,7 separation; Be serially connected on the current source; And the connection single-chip microcomputer, sensor string is connected on the end of single-pole double-throw switch (SPDT), and the other end of single-pole double-throw switch (SPDT) connects ground wire 8.
Said current source model is LM334 three end adjustable constant-flow source devices, the three end adjustable constant-flow source devices that National Semiconductor produces; The single-chip microcomputer model is STC12C5A08S2.
LM334 is the three end adjustable constant-flow source devices that National Semiconductor produces, and constant current source adjustable extent ratio is 10000:1 in working current, and has 1V to the wide dynamic reference voltage of 40V, and constant-current characteristics is very good.The foundation of constant current source only needs an outer meeting resistance and no longer needs other element.LM334 is the real suspension constant current source that need not the independent current source power supply.In addition, device can oppositely apply voltage and only flow through tens microamperes electric current to 20 V, and in the ac applications occasion, this device not only can be done the rectification while but also can make constant current source.This device also has the sense voltage characteristic that is directly proportional with absolute temperature, therefore also can be used as temperature sensor.Can obtain the constant current source of zero-temperature coefficient drift through external resistance and diode.This constant current source can be used for low-power constant current reference source, biasing networks, and saw-toothed wave generator, surge protection, LED drive and temperature sensor.When as temperature sensor, device is particularly suitable for remote temperature and measures, because the series resistor of long line can not influence measuring accuracy, and only needs the two wires transmission.
System work process:
Press different single-pole double-throw switch (SPDT)s in the practical application, the sensor number that is connected in the circuit changes, and the resistance number of current source connection just changes; Because U=IR so the voltage that current source produces also changes thereupon, presses the single-pole double-throw switch (SPDT) 6 of lower sensor 3; U1=IR1 presses the single-pole double-throw switch (SPDT) 7 of lower sensor 4, U2=IR2; Because all sensor resistances equate R1=R2, and current source current I is invariable, so the voltage that produces on each sensor also is that to equate is U1=U2; So also by fixedly rule variation, the long-living total voltage of whole piece circuit is if the single-pole double-throw switch (SPDT) of sensor 5 is pressed: sensor sum * U1, this voltage are added on the AD passage of single-chip microcomputer STC12C5A08S2 the voltage that sensor produces; Just can failure judgement through real-time collection voltage signal; And accurately judge the position of fault generating, the method speed is fast, accurately and reliably.
Claims (2)
1. the circuit of a data acquisition; It is characterized in that comprising current source (1), single-chip microcomputer (2), plurality of sensors, several single-pole double-throw switch (SPDT)s; Sensor (3,4,5) and single-pole double-throw switch (SPDT) (6,7) separation are serially connected on the current source, and connect single-chip microcomputer; Sensor string is connected on the end of single-pole double-throw switch (SPDT), and the other end of single-pole double-throw switch (SPDT) connects ground wire (8).
2. according to the circuit of the said data acquisition of claim 1, it is characterized in that said current source model is LM334 three end adjustable constant-flow source devices, the single-chip microcomputer model is STC12C5A08S2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120251543U CN202141779U (en) | 2011-07-18 | 2011-07-18 | Data acquisition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120251543U CN202141779U (en) | 2011-07-18 | 2011-07-18 | Data acquisition circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202141779U true CN202141779U (en) | 2012-02-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120251543U Expired - Fee Related CN202141779U (en) | 2011-07-18 | 2011-07-18 | Data acquisition circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202141779U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331274A (en) * | 2011-07-18 | 2012-01-25 | 唐山智诚电气有限公司 | Data acquisition circuit |
-
2011
- 2011-07-18 CN CN201120251543U patent/CN202141779U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331274A (en) * | 2011-07-18 | 2012-01-25 | 唐山智诚电气有限公司 | Data acquisition circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ma Yongfei Inventor after: Feng Yun Inventor after: Jiu Sai Inventor after: Liu Jie Inventor after: Shi Zhenhua Inventor after: Xiao Weixiong Inventor after: Zhang Jian Inventor after: Xiao Jian Inventor after: Zhang Zhaosong Inventor after: Feng Xiaona Inventor after: Sun Xitao Inventor after: Fu Heying Inventor after: Wang Lijun Inventor before: Ma Yongfei Inventor before: Feng Yun Inventor before: Jiu Sai Inventor before: Liu Jie Inventor before: Shi Zhenhua Inventor before: Xiao Weixiong Inventor before: Zhang Jian Inventor before: Xiao Jian Inventor before: Zhang Zhaosong Inventor before: Feng Xiaona Inventor before: Sun Xitao Inventor before: Fu Heying Inventor before: Wang Lijun |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20130718 |