CN1718996A - Data collection circuit and control module - Google Patents
Data collection circuit and control module Download PDFInfo
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- CN1718996A CN1718996A CNA200510044013XA CN200510044013A CN1718996A CN 1718996 A CN1718996 A CN 1718996A CN A200510044013X A CNA200510044013X A CN A200510044013XA CN 200510044013 A CN200510044013 A CN 200510044013A CN 1718996 A CN1718996 A CN 1718996A
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- circuit
- data acquisition
- control module
- acquisition circuit
- cpu
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Abstract
The present invention discloses a data acquisition and control module of logging unit. Its technical scheme is characterized by using CPU to control data acquisition and data transmission work of logging unit. It mainly includes filter circuit, multi-channel switching circuit, sampling-holding circuit, data acquisition circuit and auxiliary circuit. Said invention also provides the concrete steps of its control method.
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: purpose of the present invention 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 invention.
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 is characterized in that: controlling the data acquisition and the transfer of data work of instrument by CPU, mainly comprising No. 6 filter circuits, 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 reset circuit.
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 |
|---|---|---|---|
| CNA200510044013XA CN1718996A (en) | 2005-07-07 | 2005-07-07 | Data collection circuit and control module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200510044013XA CN1718996A (en) | 2005-07-07 | 2005-07-07 | Data collection circuit and control module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1718996A true CN1718996A (en) | 2006-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200510044013XA Pending CN1718996A (en) | 2005-07-07 | 2005-07-07 | Data collection circuit and control module |
Country Status (1)
| Country | Link |
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| CN (1) | CN1718996A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296948A (en) * | 2011-06-16 | 2011-12-28 | 中国石油天然气集团公司 | Data frame storage method of logging while drilling apparatus |
| CN102606144A (en) * | 2011-11-17 | 2012-07-25 | 日照凌智软件科技有限公司 | Front data acquisition system for mud logging unit |
| CN103195409A (en) * | 2013-03-29 | 2013-07-10 | 重庆华渝电气仪表总厂 | Multi-channel collection control system for gyro inclinometer |
-
2005
- 2005-07-07 CN CNA200510044013XA patent/CN1718996A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296948A (en) * | 2011-06-16 | 2011-12-28 | 中国石油天然气集团公司 | Data frame storage method of logging while drilling apparatus |
| CN102606144A (en) * | 2011-11-17 | 2012-07-25 | 日照凌智软件科技有限公司 | Front data acquisition system for mud logging unit |
| CN103195409A (en) * | 2013-03-29 | 2013-07-10 | 重庆华渝电气仪表总厂 | Multi-channel collection control system for gyro inclinometer |
| CN103195409B (en) * | 2013-03-29 | 2016-03-09 | 重庆华渝电气仪表总厂 | For the multichannel collecting control system of gyrolevel |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |