CN202280457U - Serial port communication module of micro-control processor - Google Patents
Serial port communication module of micro-control processor Download PDFInfo
- Publication number
- CN202280457U CN202280457U CN2011204378092U CN201120437809U CN202280457U CN 202280457 U CN202280457 U CN 202280457U CN 2011204378092 U CN2011204378092 U CN 2011204378092U CN 201120437809 U CN201120437809 U CN 201120437809U CN 202280457 U CN202280457 U CN 202280457U
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- China
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- communication module
- serial port
- operational amplifier
- port communication
- control processor
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- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Provided is a serial port communication module of a micro-control processor. The problem that the serial port communication module in an existing micro-control processor used under a shaft is distorted in amplification when an analogue signal is processed and is too severe in ultraharmonics after filtering is mainly solved. The serial port communication module is characterized by further comprising a secondary operational amplifier (U4) formed by OP07D chips, and the input end of the secondary operational amplifier (U4) is connected to the output end of a meter operational amplifier (U3). In addition, a resistance-adjustable gain resistor (R5) is connected onto an input loop circuit of the secondary operational amplifier (U4). Furthermore, the output end of the secondary operational amplifier (U4) is connected with an emitter-following circuit filter formed by two capacitors (C7 and C8), and the output end of the emitter-following circuit filter serves as the output end of the communication module. The serial port communication module of the micro-control processor has the advantages of being high in precision and low in noise, has a compensating effect on the environmental change, and is very suitable for data transmission in the special environment under the shaft.
Description
Technical field
The utility model relates to a kind of serial communication modular, specifically, relates to a kind of microcontroller processor serial port communication module that is used for device for subsurface measuring.
Background technology
Voltage signal by the pressure signal sensor output of pressing close to drill bit is smaller, needs through signal conditioning circuit signal to be carried out amplification filtering.And the data of transmitting after the microcontroller processor serial port communication module collection that is used for device for subsurface measuring in the past; Find through analyzing; The output less stable of signal circuit, jam-to-signal is bigger, can cause coherent signal to measure inaccuracy; Thereby what cause controlling is inaccurate, influences the control of the locating assembly of device for subsurface measuring to pressure and displacement.
Summary of the invention
For the problem that exists in the prior art that solves the background technology proposition; The utility model provides a kind of microcontroller processor serial port communication module; This kind microcontroller processor serial port communication module has high accuracy, low noise characteristics; And environmental change there is compensating action, is highly suitable in the particular surroundings of down-hole transmission data.
The technical scheme of the utility model is: this kind microcontroller processor serial port communication module; Comprise an instrument operational amplifier commonly used; Its unique distinction is: said module also comprises a two-level operating amplifier that is made up of the OP07D chip, and the input of said two-level operating amplifier is connected to the output of instrument operational amplifier; In addition; On the input circuit of said two-level operating amplifier, insert the gain resistor that resistance is adjustable; In addition; Be connected with by what two blocks of electric capacity constituted at the output of said two-level operating amplifier and penetrate, said penetrating with the output of circuit filtering device output as this communication module with the circuit filtering device.
The utlity model has following beneficial effect: this kind microcontroller processor serial port communication module is amplified sensor signal through the one-level instrument operational amplifier of leading portion; Because this amplifying circuit has good common-mode rejection ratio; Improve the precision and the signal to noise ratio that reduces signal of signal, the output signal reduces the ripple of output signal through the secondary filter circuit; Reduce signal noise; The ALT-CH alternate channel that makes drilling pressure sensor voltage input signal be directly inputted to analog-digital converter carries out digitized processing, reaches the demand of device for subsurface measuring, and this kind microcontroller processor serial port communication module has realized the high accuracy and the rapidity of signal condition; Improve the low noise of signal, had very strong practicality.
Description of drawings:
Fig. 1 is the circuit theory diagrams of the utility model.
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is described further:
By shown in Figure 1; This kind microcontroller processor serial port communication module; The instrument operational amplifier U3 that comprises a routine; Its unique distinction is: said module also comprises a two-level operating amplifier U4 who is made up of the OP07D chip, and the input of said two-level operating amplifier U4 is connected to the output of instrument operational amplifier U3; In addition; On the input circuit of said two-level operating amplifier U4, insert the gain resistor R5 that resistance is adjustable; In addition; Be connected with by what two capacitor C 7, C8 constituted at the output of said two-level operating amplifier U4 and penetrate, said penetrating with the output of circuit filtering device output as this communication module with the circuit filtering device.
During concrete the application, the drilling pressure sensor signal is connected to input terminal IN+ and the IN-of instrument operational amplifier U3 through the J2 terminal; The input terminal VS+ of instrument operational amplifier U3 and VS-insert power supply AVDD and place of working; The terminal RG insertion gain of instrument operational amplifier U3 is provided with the 100 Ohmic resistance R4 and the 20K Europe adjustable resistance R5 of resistance; Gain is provided with resistance R 4 other end cut-in operations ground, and gain is provided with the lead-out terminal VOUT that resistance R 5 other ends insert instrument operational amplifier U3; Reference terminal VREF1 and the VREF2 of instrument operational amplifier U3 are connected to the place of working; Filter capacitor C6 connects power supply AVDD and place of working; The lead-out terminal VOUT of instrument operational amplifier U3 connects two-level operating amplifier U4 terminal 3; 2 of two-level operating amplifier U4 is connected to two-level operating amplifier U4 lead-out terminal 6; The terminal 7 and 4 of two-level operating amplifier U4 inserts AVDD power supply and place of working respectively; Filter capacitor C7 is connected between AVDD power supply and the place of working, and decoupling capacitor C8 is connected between two-level operating amplifier U4 lead-out terminal 6 and the place of working.
What the secondary filter circuit of conditioning module adopted is to penetrate the hardware filtering of realizing signal with circuit; Adopt the maximum voltage drift to be the amplifier of 150uV, low input bias current maximum is merely 10nA, single dual power supply; Output current 8mA, operating temperature range-40 ℃～+ 125 ℃.The filter circuit of described secondary implements simply easily and can guarantee the required precision of system; Only need the negative input end of this amplifier is linked to each other with output; Chip power supply and output link to each other just can constitute through the electric capacity of 0.01uF and penetrate with the filtering of circuit realization signal hardware, and the output of filter circuit and link a 10uF go lotus root electric capacity to reduce to export the ripple of signal.Amplification of process one-level and the filtered drilling pressure sensor voltage of secondary input signal just can input to the ADC ALT-CH alternate channel and carry out the A/D conversion process.
In sum; This kind of microcontroller processor serial port communication module is used one-level computing amplification and secondary filter circuit; Making drilling well signal transducer signal output high accuracy, low noise provides reliable voltage signal for offering analog-digital converter, has very strong practicality.
Claims (1)
1. microcontroller processor serial port communication module; Comprise instrument operational amplifier (U3); It is characterized in that: said module also comprises a two-level operating amplifier that is made up of the OP07D chip (U4), and the input of said two-level operating amplifier (U4) is connected to the output of instrument operational amplifier (U3); In addition; On the input circuit of said two-level operating amplifier (U4), insert the gain resistor (R5) that resistance is adjustable; In addition; Be connected with at the output of said two-level operating amplifier (U4) that (C7, what C8) constitute penetrates with the circuit filtering device, said penetrating with the output of the circuit filtering device output as this communication module by two blocks of electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204378092U CN202280457U (en) | 2011-11-08 | 2011-11-08 | Serial port communication module of micro-control processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204378092U CN202280457U (en) | 2011-11-08 | 2011-11-08 | Serial port communication module of micro-control processor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202280457U true CN202280457U (en) | 2012-06-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204378092U Expired - Fee Related CN202280457U (en) | 2011-11-08 | 2011-11-08 | Serial port communication module of micro-control processor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202280457U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556746A (en) * | 2020-11-02 | 2021-03-26 | 光华临港工程应用技术研发(上海)有限公司 | Data acquisition device and method for deep sea detection |
-
2011
- 2011-11-08 CN CN2011204378092U patent/CN202280457U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556746A (en) * | 2020-11-02 | 2021-03-26 | 光华临港工程应用技术研发(上海)有限公司 | Data acquisition device and method for deep sea detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20131108 |