CN2833104Y - Data acquisition circuit and control module - Google Patents
Data acquisition circuit and control module Download PDFInfo
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- CN2833104Y CN2833104Y CNU2005200851433U CN200520085143U CN2833104Y CN 2833104 Y CN2833104 Y CN 2833104Y CN U2005200851433 U CNU2005200851433 U CN U2005200851433U CN 200520085143 U CN200520085143 U CN 200520085143U CN 2833104 Y CN2833104 Y CN 2833104Y
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Abstract
The utility model discloses a data collection circuit and a control module for logging instrument. The technical scheme of the data collection circuit and the control module is that a CPU controls the data collection and data transmission of the instrument. The data collection circuit and the control module mainly includes a filter circuit, a multi-path switching circuit, a sampling-hold circuit, a data collection circuit and an auxiliary circuit. An amplifier and relative resistance-capacitances thereof comprise the active filter circuit which uses multi-path analog signal for filtering, and the filtering frequency of the filter circuit is 0.2Hz. The multi-path switch is a switch of choosing 1 out of 16, and the on-off of each channel is controlled by the CPU. The analog signal entering into the data collection circuit first passes the active filtering, and the on-off of each channel of the multi-path switch is controlled by the CPU. The data collection circuit makes A/D conversion of the analog signals which come from the multi-path switch, and after converting, the read data is controlled by the CPU. When the A/D conversion is conducted, the sampling-hold circuit makes the input analog quantity stay at an electric voltage hold mode and the auxiliary circuit ensures the data storage and the CPU reset in order to keep the accuracy of the collection, thus the collecting and processing speed is greatly increased, which increases the data collecting accuracy and the controlling correctness.
Description
One, technical field: the invention discloses a kind of data acquisition and control module that is used for oil field downhole logging instrument device.
Two, background technology: the data acquisition of logging instrument and control module are its cores, in the data circuit collection and control module of present logging instrument, general employing RC filtering during the analog signal input, the speed of gathering and handling is also slow, baud rate is generally 8kbit/s, has so just reduced the precision of data acquisition and the accuracy of control.
Three, summary of the invention: the purpose of this utility model is exactly the above-mentioned defective that exists at existing instrument, provides a kind of and can improve the precision of data acquisition and the data acquisition circuit and the control module of precise control.
Its technical scheme is to be controlled the data acquisition and the transfer of data work of instrument by CPU, mainly comprises No. 6 filter circuits, 1 multi-way switch circuit, 1 sampling hold circuit, 1 data Acquisition Circuit and auxiliary circuit.Wherein 6 amplifiers and relevant resistance capacitance thereof have been formed the active filter circuit that 6 tunnel analog signals are carried out filtering respectively, and its frequency filtering is 0.2Hz.Variable connector is 16 to select 1 switch, is controlled the gating of each passage by CPU.Sampling hold circuit is an input of being controlled this circuit by control module, makes the analog quantity of input be in the voltage hold mode in the A/D transition period.Data acquisition circuit will carry out the A/D conversion from the analog signal of variable connector, convert the back by CPU control sense data.Auxiliary circuit comprises data storage and reset circuit.Data storage is used for the storage sensor parameter, controls it by CPU and reads or write data.Reset circuit offers tool reset pulse, and when CPU did not work or powers on, this pulse resetted it.
6 tunnel analog signals that enter data acquisition circuit are earlier through active power filtering, and by the gating of each passage of CPU control variable connector, data acquisition circuit will carry out the A/D conversion from the analog signal of variable connector, convert the back by CPU control sense data.In order to guarantee acquisition precision, when carrying out the A/D conversion, make the analog quantity of input be in the voltage hold mode by sampling hold circuit.Auxiliary circuit guarantees data storage and cpu reset.The speed of gathering and handling improves greatly, has so just improved the precision of data acquisition and the accuracy of control.
Four, description of drawings:
Accompanying drawing is a circuit block diagram of the present utility model.
Five, the specific embodiment:
With reference to the accompanying drawings the present invention is described further: this module is the core that whole deviational survey well instrument data is gathered and controlled, CPU (as AT89C52) is controlling the data acquisition of whole downhole cartridge, and the work of transfer of data, mainly comprise 6 road filter circuits, 1 multi-way switch circuit, 1 sampling hold circuit, 1 data Acquisition Circuit and some auxiliary circuits.
6 road filter circuits adopt is the active filter circuit of OP07 and relevant resistance capacitance composition, and its frequency filtering is 0.2 hertz.Analog signal enters 16 and selects 1 switch (as AD7506) after filtering, carry out the A/D conversion from the analog signal access A/D conversion (as AD574) of variable connector, and the beginning of conversion is started by address signal 8000H, converts the back and reads 12 bit data by CPU control.Sampling hold circuit uses SMP11-AY, and input is P2, and AT89C52 controls its S/H by P1.4, makes the analog quantity of input locate the voltage hold mode in the A/D transition period, to guarantee acquisition precision.The 16 bit address highest order P2.7 of AT89C52 are connected to the E3 of 138 decoders, P2.0, P2.1, P2.2 are connected to the A of 138 decoders respectively, B, the C pin, through the address of IC16 decoding back generation respectively as the chip selection signal of chips such as AD574.
Claims (8)
1, a kind of data acquisition circuit and control module, it is characterized in that: data acquisition and transfer of data work by CPU is controlling instrument are connected with No. 6 filter circuits respectively in the CPU periphery, 1 multi-way switch circuit, 1 sampling hold circuit, 1 data Acquisition Circuit and auxiliary circuit.
2, according to right 1 described data acquisition circuit and control module, it is characterized in that: 6 amplifiers and relevant resistance capacitance thereof have been formed the active filter circuit that 6 tunnel analog signals are carried out filtering respectively, and its frequency filtering is 0.2Hz.
3, according to right 1 described data acquisition circuit and control module, it is characterized in that: variable connector is 16 to select 1 switch, is controlled the gating of each passage by CPU.
4, according to right 1 described data acquisition circuit and control module, it is characterized in that: sampling hold circuit is an input of being controlled this circuit by control module, makes the analog quantity of input be in the voltage hold mode in the A/D transition period.
5, according to right 1 described data acquisition circuit and control module, it is characterized in that: data acquisition circuit will carry out the A/D conversion from the analog signal of variable connector, convert the back by CPU control sense data.
6, according to right 1 described data acquisition circuit and control module, it is characterized in that: auxiliary circuit comprises data storage and the reset circuit that is connected with CPU.
7, according to right 6 described data acquisition circuit and control modules, it is characterized in that: data storage is used for the storage sensor parameter, controls it by CPU and reads or write data.
8, according to right 6 described data acquisition circuit and control modules, it is characterized in that: reset circuit offers tool reset pulse, and when CPU did not work or powers on, this pulse resetted it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200851433U CN2833104Y (en) | 2005-07-07 | 2005-07-07 | Data acquisition circuit and control module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200851433U CN2833104Y (en) | 2005-07-07 | 2005-07-07 | Data acquisition circuit and control module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2833104Y true CN2833104Y (en) | 2006-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200851433U Expired - Fee Related CN2833104Y (en) | 2005-07-07 | 2005-07-07 | Data acquisition circuit and control module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2833104Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924366A (en) * | 2010-08-19 | 2010-12-22 | 上海浦元自动化科技有限公司 | Distributed active filter |
| CN101968639A (en) * | 2010-11-02 | 2011-02-09 | 上海电器科学研究院 | Analog quantity acquisition module for programmable logic controller (PLC) extension |
| CN101392645B (en) * | 2008-08-25 | 2012-12-26 | 中国海洋石油总公司 | Rapid phase discrimination and automatic transmission unit |
-
2005
- 2005-07-07 CN CNU2005200851433U patent/CN2833104Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392645B (en) * | 2008-08-25 | 2012-12-26 | 中国海洋石油总公司 | Rapid phase discrimination and automatic transmission unit |
| CN101924366A (en) * | 2010-08-19 | 2010-12-22 | 上海浦元自动化科技有限公司 | Distributed active filter |
| CN101968639A (en) * | 2010-11-02 | 2011-02-09 | 上海电器科学研究院 | Analog quantity acquisition module for programmable logic controller (PLC) extension |
| CN101968639B (en) * | 2010-11-02 | 2012-08-22 | 上海电器科学研究院 | Analog quantity acquisition module for programmable logic controller (PLC) extension |
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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: 20061101 Termination date: 20140707 |
|
| EXPY | Termination of patent right or utility model |