CN201051219Y - AD channel self-check module for computer monitoring system collection board - Google Patents
AD channel self-check module for computer monitoring system collection board Download PDFInfo
- Publication number
- CN201051219Y CN201051219Y CNU2007200909077U CN200720090907U CN201051219Y CN 201051219 Y CN201051219 Y CN 201051219Y CN U2007200909077 U CNU2007200909077 U CN U2007200909077U CN 200720090907 U CN200720090907 U CN 200720090907U CN 201051219 Y CN201051219 Y CN 201051219Y
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- China
- Prior art keywords
- way switch
- electrically connected
- switch module
- input channel
- detecting system
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- Expired - Lifetime
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Abstract
The utility model discloses an AD passage self-checking module used for collecting boards of microcomputer layout systems, which comprises a base plate and a multi-way switch module arranged on the base plate, wherein a one-way input channel interface of the multi-way switch module is electrically connected with an output end of a reference voltage and resistance branch circuit, the rest input channel interfaces of the multi-way switch module are respectively electrically connected with the analog quantity output interfaces of the microcomputer layout systems, the output interfaces of the multi-way switch module are electrically connected with the input channel interfaces of the AD passage self-checking module of collecting boards of microcomputer layout systems. The utility model has the advantages of automatic detection for the AD passage of the collecting boards of microcomputer layout systems, simultaneously, the module is simple and convenient to be achieved, and does not affect other analog quantity input channels.
Description
Technical field
The utility model relates to the microcomputer detecting system collection plate, especially relates to the AD passage selftest module that is used for the microcomputer detecting system collection plate.
Background technology
In microcomputer detecting system, requirement and real-time to the analog quantity monitoring accuracy are more and more high, follow detection also to become more and more important simultaneously to the analog acquisition passage, it is inaccurate or directly be the situation of mistake usually to occur at present collection value at the scene in the use, greatly reduces the accuracy of microcomputer detecting system.
The utility model content
The utility model purpose is to provide a kind of AD passage selftest module that is used for the microcomputer detecting system collection plate, and this module implements simple and convenient and do not influence the operate as normal of other analog input channel.
For achieving the above object, the utility model can be taked following technical proposals:
The AD passage selftest module that is used for the microcomputer detecting system collection plate described in the utility model, it comprises substrate, is arranged on the multi-way switch module on the described substrate; One tunnel input channel interface of described multi-way switch module is electrically connected with reference voltage branch road output terminal, all the other input channel interfaces of multi-way switch module are electrically connected with the microcomputer detecting system analog output interface circuit respectively, and the output interface of multi-way switch module is electrically connected with microcomputer detecting system collection plate AD input channel interface.
Described reference voltage props up the resistance that route two high precision, low temperature float and is composed in series, and an end of reference voltage branch road is electrically connected with power supply, other end ground connection; Contact between two resistance is electrically connected with one tunnel input channel interface of described multi-way switch module.
The utility model advantage is to be arranged on the multi-way switch module on the described substrate, and wherein one tunnel input channel interface of multi-way switch module is electrically connected with reference voltage branch road output terminal, therefore, during use, all the other input channel interfaces of multi-way switch module are electrically connected with the microcomputer detecting system analog output interface circuit respectively, the output interface of multi-way switch module is electrically connected with microcomputer detecting system collection plate AD passage input interface, like this, be equivalent to one road AD passage and gather multi-analog, during microcomputer detecting system work, its CPU gathers this road fixed voltage value by the gating Multiplexer Channel and judges in program, if the value of gathering and the magnitude of voltage of setting have than large deviation, can think that promptly this paths is bad, and this passage is changed to Reflector in time sends warning, a few road of on this multi-way switch other input analog amount collection value just can not be used so, thereby reaches the automatic detection to microcomputer detecting system collection plate AD passage.Simultaneously, this module implements simple and convenient, and does not influence other analog input channel.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the schematic block circuit diagram of Fig. 1.
Embodiment
As shown in the figure, the AD passage selftest module that is used for the microcomputer detecting system collection plate described in the utility model, it comprises substrate, is arranged on the multi-way switch module U200 on the described substrate; The road input channel interface of described multi-way switch module U200 is electrically connected with reference voltage branch road output terminal, all the other input channel interfaces of multi-way switch module U200 are electrically connected with the microcomputer detecting system analog output interface circuit respectively, and the output interface of multi-way switch module U200 is electrically connected with microcomputer detecting system collection plate AD input channel interface.Described reference voltage branch road adopts the resistance R 277, the R276 that are floated by two high precision, low temperature to be composed in series, and an end of reference voltage branch road is electrically connected with power supply, other end ground connection; Contact between two resistance R 277, the R276 is electrically connected with the road input channel interface of described multi-way switch module U200, gathers this road fixed voltage value for the CPU of microcomputer detecting system by the gating Multiplexer Channel and judges in program as the reference voltage value of setting.
Claims (2)
1. AD passage selftest module that is used for the microcomputer detecting system collection plate, it is characterized in that: it comprises substrate, is arranged on the multi-way switch module (U200) on the described substrate; One tunnel input channel interface of described multi-way switch module (U200) is electrically connected with reference voltage branch road output terminal, all the other input channel interfaces of multi-way switch module (U200) are electrically connected with the microcomputer detecting system analog output interface circuit respectively, and the output interface of multi-way switch module (U200) is electrically connected with microcomputer detecting system collection plate AD input channel interface.
2. the AD passage selftest module that is used for the microcomputer detecting system collection plate according to claim 1, it is characterized in that: described reference voltage props up the resistance (R277, R276) that route two high precision, low temperature float and is composed in series, one end of reference voltage branch road is electrically connected with power supply, other end ground connection; Contact between two resistance (R277, R276) is electrically connected with one tunnel input channel interface of described multi-way switch module (U200).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200909077U CN201051219Y (en) | 2007-07-03 | 2007-07-03 | AD channel self-check module for computer monitoring system collection board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200909077U CN201051219Y (en) | 2007-07-03 | 2007-07-03 | AD channel self-check module for computer monitoring system collection board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201051219Y true CN201051219Y (en) | 2008-04-23 |
Family
ID=39337714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200909077U Expired - Lifetime CN201051219Y (en) | 2007-07-03 | 2007-07-03 | AD channel self-check module for computer monitoring system collection board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201051219Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825898B (en) * | 2009-03-03 | 2013-02-06 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Control system with fault diagnosis function and method |
| 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 |
-
2007
- 2007-07-03 CN CNU2007200909077U patent/CN201051219Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825898B (en) * | 2009-03-03 | 2013-02-06 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Control system with fault diagnosis function and method |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080423 |
|
| CX01 | Expiry of patent term |