CN104515744B - Infrared total hydrocarbon identification systems - Google Patents
Infrared total hydrocarbon identification systems Download PDFInfo
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- CN104515744B CN104515744B CN201410183091.7A CN201410183091A CN104515744B CN 104515744 B CN104515744 B CN 104515744B CN 201410183091 A CN201410183091 A CN 201410183091A CN 104515744 B CN104515744 B CN 104515744B
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Abstract
The invention provides a kind of infrared total hydrocarbon identification systems with temperature compensation function.The infrared total hydrocarbon identification systems pass through respective sensor sense ambient temperature, when environment temperature deviates preset temperature interval, detection data is compensated automatically by compensation circuit, so as to improve the stability and reliability of detection data, for field geology mud logging techniques personnel have found oil gas in time and judge that oil and gas anomaly shows and provide direct reference data.
Description
Technical field
Taken off from drilling mud the present invention relates to technical field of optical detection, more particularly to a kind of detection using infrared light
The infrared total hydrocarbon identification systems of the sample gas for going out.
Background technology
The online gas logging technology of petroleum geology drilling well, is exactly in drilling process, to the hydrocarbon gas in drilling mud
Real-time detection analysis is carried out, bottom oil/gas show is found with this, and judge rank, depth, thickness of oil/gas show etc., so as to obtain
Obtain every mouthful of specific geologic information of oil well true and accurate.
Infrared total hydrocarbon identification systems are the most commonly used equipment in the online gas logging technology of petroleum geology drilling well, and it is used
NDIR (NDIR) principle detects the concentration of hydrocarbon gas, so that for field geology mud logging techniques personnel have found in time
Oil gas and judge the oil and gas anomaly display direct reference data of offer.
Fig. 1 is the structural representation of the infrared total hydrocarbon identification systems of prior art.Fig. 1 is refer to, the infrared total hydrocarbon identification system
System includes：Gas-detecting cavity room 10；It is sealed in the Miniature infrared gas sensor 11 in the gas-detecting cavity room 10；Positioned at gas
The intake interface 41 of the front end of body detection chambers 10, gas device for drying and filtering 42, air pump 43, flow-controlling meter 44；And positioned at gas
The outlet interface 45 of the rear end of body detection chambers 10.When actually being detected, it is powered to air pump 43, is persistently inhaled from intake interface 41
Enter tested gas；Tested gas first passes through the dry filter of gas device for drying and filtering 42, is then transported to gas by air pump 43
Inside flowmeter 44, gas flow is arranged on by a stationary value by adjusting gas flow meter 44, tested gas enters gas
After detection chambers 10, fully detected by Miniature infrared gas sensor 11,45 are discharged by outlet interface.
However, realize it is of the invention during, it is found by the applicant that existing infrared total hydrocarbon identification systems are only encapsulated
One infrared sensor, its at a normal temperature can normal work, however, underground environment is intricate in drilling process,
Temperature conditions is ever-changing, and these result in infrared sensor and occur error in measurement data, has a strong impact on infrared complete
The precision of hydrocarbon identification systems.
The content of the invention
(1) technical problem to be solved
In view of above-mentioned technical problem, the invention provides a kind of infrared total hydrocarbon identification systems, to eliminate environment temperature to red
Outer total hydrocarbon identification systems identify the influence of accuracy.
(2) technical scheme
The present invention is infrared, and total hydrocarbon identification systems include：Gas-detecting cavity room 10；Infrared gas sensor 11, is sealed in gas
In detection chambers 10, for carrying out infrared optics detection to entering the gas in gas-detecting cavity room 10；Temperature sensor 12, it is close
It is encapsulated in gas-detecting cavity room 10, for being detected to the temperature for entering the gas in gas-detecting cavity room 10；Temperature adjustment
Device 20, outside gas-detecting cavity room 10 or in gas-detecting cavity room 10；And data acquisition compensation circuit 30, with temperature
Degree sensor 12 is connected with temperature-adjusting device 20, for the temperature departure preset temperature area detected when temperature sensor 12
Between when, control temperature-adjusting device 20 temperature in gas-detecting cavity room 10 is controlled, to stabilize it in preset temperature
In interval.
(3) beneficial effect
From above-mentioned technical proposal as can be seen that in infrared total hydrocarbon identification systems of the invention, sensor uses integrative packaging
Multiple probe technologies, are packaged with temp-sensing element and infrared sensor, and are designed with data acquisition compensation circuit, can be automatically according to
Ambient temperature conditions are compensated, so as to improve the stability and reliability of infrared total hydrocarbon detection.
Brief description of the drawings
Fig. 1 is the structural representation of the infrared total hydrocarbon identification systems of prior art；
Fig. 2 is the schematic diagram according to the infrared total hydrocarbon identification systems of the embodiment of the present invention；
Fig. 3 is the pin schematic diagram of infrared gas sensor IR12GJ in infrared total hydrocarbon detecting system shown in Fig. 2；
Fig. 4 is thermostatic structural representation in infrared total hydrocarbon identification systems shown in Fig. 2；
Fig. 5 is the circuit diagram of data acquisition compensation circuit in infrared total hydrocarbon identification systems shown in Fig. 2；
Fig. 6 is the circuit diagram of filter circuit module in data acquisition compensation circuit shown in Fig. 5；
Fig. 7 A are the circuit diagram of one stage signal amplification module；
Fig. 7 B are the circuit diagram of second signal amplification module；
Fig. 8 is the circuit diagram of analog-to-digital conversion module in data acquisition compensation circuit shown in Fig. 5；
Fig. 9 is the circuit diagram of LM3S600 control chips in data acquisition compensation circuit shown in Fig. 5；
Figure 10 is the control program flow chart of firing in LM3S600 control chips shown in Fig. 9.
【Main element symbol description】
10- gas-detecting cavities room；
11- infrared gas sensors；12- temperature sensors；
20- temperature-adjusting devices；
30- data acquisition compensation circuits；
40- peripheral components；
41- intake interfaces；42- gas devices for drying and filtering；
43- air pumps；44- flow-controlling meters；
45- outlet interfaces.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.It should be noted that in accompanying drawing or specification description, similar or identical portion
Divide and all use identical figure number.The implementation for not illustrated in accompanying drawing or being described, is those of ordinary skill in art
Known form.In addition, though the demonstration of the parameter comprising particular value can be provided herein, it is to be understood that parameter is without definite etc.
In corresponding value, but corresponding value can be similar in acceptable error margin or design constraint.Mentioned in embodiment
Direction term, for example " on ", D score, "front", "rear", "left", "right" etc., be only the direction of refer to the attached drawing.Therefore, the side for using
It is for illustrating not for limiting the scope of the invention to term.
The present invention is infrared, and total hydrocarbon identification systems set temp-sensing element in gas-detecting cavity room, and in gas-detecting cavity room
Portion or outside setting heating/cooling element, when the temperature departure preset temperature in gas-detecting cavity room, heating/cooling element
Work, makes temperature in gas-detecting cavity room return normal value, and from regardless of whether how ambient temperature changes, miniature infrared-gas are passed
Sensor is able to detect that the gas of normal temperature, so as to eliminate the influence of temperature, it is ensured that infrared total hydrocarbon identification systems
Precision.
In one exemplary embodiment of the present invention, there is provided a kind of infrared total hydrocarbon identification systems.Fig. 2 is according to this hair
The schematic diagram of the bright infrared total hydrocarbon identification systems of embodiment.Fig. 2 is refer to, the infrared total hydrocarbon identification systems include：Gas-detecting cavity
Room 10；Infrared gas sensor 11, is sealed in gas-detecting cavity room 10, for being carried out to the gas in gas-detecting cavity room 10
Infrared optics is detected；Temperature sensor 12, is sealed in gas-detecting cavity room 10, for the gas in gas-detecting cavity room 10
Temperature detected；Temperature-adjusting device 20, fits in the outside of gas-detecting cavity room 10；Data acquisition compensation circuit 30,
It is connected with temperature sensor 12 and temperature-adjusting device 20, the default temperature of the temperature departure for being detected when temperature sensor 12
When degree is interval, control temperature-adjusting device 20 is controlled to the temperature in gas-detecting cavity room 10, to stabilize it default
In temperature range.
Each part to the infrared total hydrocarbon identification systems of the present embodiment is described in detail below.
Gas-detecting cavity room 10, infrared gas sensor 11, intake interface 41, gas device for drying and filtering in the present embodiment
42nd, the part such as air pump 43 and flow-controlling meter 44 is identical with corresponding component of the prior art, is no longer described in detail herein.
Fig. 2 is refer to, infrared gas sensor 11 is sealed in the lower section in gas-detecting cavity room 10, and temperature sensor 12 is
The temperature sensor in infrared gas sensor 11 is integrated in, but the present invention is not limited thereto.In other embodiments of the invention
In, temperature sensor can also be relative to the temperature sensor of infrared gas sensor independence.
In the present embodiment, infrared gas sensor 11 is using IR12GJ chips U23.Fig. 3 is infrared total hydrocarbon identification shown in Fig. 2
The pin schematic diagram of infrared gas sensor IR12GJ chips in system.Fig. 3 is refer to, in IR12GJ chips U23, gas inspection
The temperature surveyed in chamber is connected to data acquisition compensation circuit in the form of analog signal by pin 7-TEMP CH3.So set
Put, can be output signal to the outside by the unification of infrared gas sensor 11, so as to simplify the circuit in gas-detecting cavity room 10
Construction, reduce causes the risk of the seal failure of gas-detecting cavity room 10 due to outside line.
Additionally, in the U23 of IR12GJ chips shown in Fig. 3, AVCC pins, LAMP pins, LAMPRET pins, PYRO1IN pipes
Pin, PYRO2IN pins and AGND pins are general pin.It should be apparent to those skilled in the art that know these pins
Annexation, holds this and repeats no more.
In the outside of gas-detecting cavity room 10, temperature-adjusting device 20 is pasted with.Fig. 4 is infrared total hydrocarbon identification shown in Fig. 2
Thermostatic structural representation in system.Fig. 4 is refer to, the temperature-adjusting device 20 is in the sheet with a radian,
And the radian matches with the radian of the lateral surface of gas-detecting cavity room 10.Wherein, the temperature-adjusting device is symmetrical
Construction, the area of its outer surface of blanketing gas detection chambers 10 about 40%.The thermostatic material is metal.
In the present embodiment, the temperature-adjusting device is simple heater.The heater includes heating plate and positive and negative
Power line.When the temperature in the gas-detecting cavity room that temperature sensor 12 is detected is less than preset temperature, data acquisition compensation
The control heater of circuit 30 is heated to gas-detecting cavity room 10；After the temperature that temperature sensor is detected reaches steady state value,
Stop heating, so as to ensure that gas-detecting cavity room is in temperature constant state.Wherein, the preset temperature is 45 DEG C.
Temperature-adjusting device of the invention is not limited to above-mentioned heater.In the present invention, the temperature-adjusting device
Can also be chiller, or heater and chiller aggregate.Meanwhile, the temperature-adjusting device is also not limited to
Positioned at the outside of gas-detecting cavity room, it can be equally located in gas-detecting cavity room 10, and its blanketing gas detection chambers
10 area can be adjusted as needed, and bigger better, those skilled in the art should will be apparent that its set-up mode, herein
No longer it is described in detail.
In another embodiment of the present invention, temperature-adjusting device is chiller.The chiller includes：Refrigeration
Piece, data acquisition compensation circuit is electrically connected to by positive-negative power line.When the temperature that temperature sensor 12 is detected is higher than pre-
If during temperature, data acquisition compensation circuit 30 controls the chiller to cool down gas-detecting cavity room 10.Wherein, this is preset
Temperature is 25 DEG C.
In yet another embodiment of the present invention, temperature-adjusting device is the aggregate of chiller and heater.Should
Aggregate is similarly sheet, and it includes：Heating plate and refrigerating sheet, both are electrically connected to data and adopt by positive-negative power line respectively
Collection compensation circuit, fits in the left and right sides of gas-detecting cavity room 10 or upper and lower two parts respectively.For the aggregate, work as temperature
When the temperature that sensor 12 is detected is higher than preset temperature, data acquisition compensation circuit 30 provides electricity to the aggregate refrigerating sheet
Source, so as to be cooled down to gas-detecting cavity room 10.When the temperature that temperature sensor 12 is detected is less than preset temperature, data
Collection compensation circuit 30 provides power supply to the aggregate heating plate, so as to be heated to gas-detecting cavity room 10.Wherein, this is pre-
If temperature range is 25 DEG C~45 DEG C.
Fig. 5 is the circuit diagram of data acquisition compensation circuit in infrared total hydrocarbon identification systems shown in Fig. 2.Fig. 5 is refer to, the number
Include according to collection compensation circuit：Filter circuit module, for entering to the temperature signal that the transmission of temperature sensor IR12GH chips comes
Row filtering；Signal amplification module, is connected with filter circuit module, and the temperature signal for being exported to filter circuit module is carried out
Amplify；Analog-to-digital conversion module, is connected with signal amplification module, for the temperature signal that signal amplification module is exported to be carried out into mould
Number conversion；Control chip, is connected with analog-to-digital conversion module, for the temperature signal that exports analog-to-digital conversion module with it is default
Temperature range is compared, and when it deviates preset temperature interval, control temperature-adjusting device 20 is in gas-detecting cavity room 10
Temperature be controlled, to stabilize it in preset temperature is interval, so as to ensure that gas-detecting cavity room is in temperature constant state.
The various pieces in data acquisition compensation circuit are described in detail below.
Fig. 6 is the circuit diagram of filter circuit module in data acquisition compensation circuit shown in Fig. 5.Fig. 6 is refer to, the filtered electrical
Road module includes：32nd resistance R32, its first end is connected to shown in Fig. 3 as the input of this filter circuit module
The pin 7 of IR12GJ chips；36th electric capacity C36, its first end is connected to second end of the 32nd resistance R32, and it
Two end ground connection-AGND；26th electric capacity C26, its first end is connected to the 32nd resistance by the 26th resistance R26
Second end of R32；Its second end ground connection-AGND；The first end of the 26th electric capacity C26 is used as the defeated of this filter circuit module
Go out end.
Wherein, the resistance of the 32nd resistance R32 is 1.5k Ω；The capacitance of the 36th electric capacity C36 is 0.1,；Second
The resistance value of 16 resistance R26 is 1k Ω；The capacitance of the 26th electric capacity C26 is 0.01 μ F.
Signal amplification module is divided into one stage signal amplification module and second signal amplification module.Fig. 7 A amplify for one stage signal
The circuit diagram of module.Fig. 7 B are the circuit diagram of second signal amplification module.
Fig. 7 A are refer to, the one stage signal amplification module is single channel magnifier, including：AD620 instrument amplifiers
Chip U5.In AD620 instrument amplifier chips U5, pin 3 is connected to filtering as normal phase input end by the 7th resistance R7
Output end -+the INA of circuit module；Pin 2 is used as inverting input, ground connection-AGND；Pin 6 as U5 output end-AD
IN。
Additionally, the annexation of the AD620 instrument amplifier chip U5 other pins is as follows：Pin 1 passes through the 33rd
Resistance R33 is connected to its pin 8；Pin 3 is grounded by the 5th electric capacity C5；Pin 4 is connected to power supply negative voltage -8V, and leads to
Cross the 11st electric capacity C11 ground connection；Pin 7 is connected to power supply positive voltage+8V, and is grounded by the 13rd electric capacity C13.
Wherein, the resistance of the 33rd resistance is 5.49k Ω；The resistance of the 7th resistance R7 is 100 Ω；5th electric capacity C5's
Capacitance is 2.2nF, and the capacitance of the 11st electric capacity C11 is 0.1, the capacitance of the 13rd electric capacity C13 is 0.1,.
Fig. 7 B are refer to, the second signal amplification module is two-way operational amplification circuit, including：First OP2177 of cascade
Two-way operational amplifier chip U4A and the 2nd OP2177 two-way operational amplifier chips U4B.
For an OP2177 two-way operational amplifier chip U4A, its pin 2 is electric by the tenth as inverting input
Resistance R10 is connected to the pin 6-AD IN of AD620 instrument amplifiers chip U5 shown in Fig. 7 A, and ginseng is connected to by the 9th resistance R9
Examine voltage-Vref’；Its pin 3 is connected to the ground-AGND；Its pin 4 is connected to power supply negative voltage -- 8V, and by the 9th electric capacity C9
It is connected to the ground-AGND；Its pin 8 is connected to power supply positive voltage -+8V, and is connected to the ground-AGND by the tenth electric capacity C10；Its pipe
Pin 1 is connected to pin 2 by the 11st resistance, forms anti-phase closed loop amplifier, and the pin 1 is transported as an OP2177 two-ways
Calculate the output end of amplifier chip U4A.,
For the 2nd OP2177 two-way operational amplifier chip U4B, its pin 6 as inverting input, by the 12nd
Resistance R12 is connected to the pin 1 of an OP2177 two-way operational amplifier chips U4A；Its pin 5 as normal phase input end,
It is connected to the ground-AGND；Its pin 7 is connected to pin 6 by the 13rd resistance R13, forms anti-phase closed loop amplifier, and by the 8th
Resistance R8 is exported, and used as the output end of this U4B, the output end is connected to the ground-AGND by the 6th electric capacity C6.
In the two-way operational amplification circuit, the resistance of the 8th resistance R8 is 100 Ω；9th resistance R9 and the tenth resistance R10
Resistance be 20k Ω；11st resistance R11, the resistance of the 12nd resistance R12 and the 13rd resistance R13 are 10k Ω；The
The capacitance of six electric capacity C6 is 2.2nF；The capacitance of the 9th electric capacity C9 and the tenth electric capacity C10 is 0.1,；
Fig. 8 is the circuit diagram of analog-to-digital conversion module in data acquisition compensation circuit shown in Fig. 5.Fig. 8 is refer to, the modulus turns
Mold changing block includes：ADS8325 modulus conversion chip U13, its pin 2 is connected to two grades shown in Fig. 7 B as input end of analog signal
Output end-the ADIN+ of signal amplification module；Its pin 6 is used as digital signal output end.
Because ADS8325 modulus conversion chips have been well known to those skilled in the art, pin 2 and pin are removed for it
Other pins outside 6：Such as pin 1-VREF, pin 3--In, pin 4-GND, pin 5-CONV, pin 7-CLK, pin 8-+
The annexation of VCC etc., is processed according to common connection, and here is omitted.Additionally, except ADS8325 moduluses
Outside conversion chip, the function of analog-to-digital conversion can also be realized using other chips, here is omitted.
Fig. 9 is the circuit diagram of LM3S600 control chips in data acquisition compensation circuit shown in Fig. 5.Fig. 9 is refer to, should
In LM3S600 control chips U19, its pin 21 is connected to ADS8325 moduluses shown in Fig. 8 and turns as temperature digital signal input part
The pin 6 of parallel operation；Its pin 46 is connected to temperature-adjusting device.For removing pin 21 and pin 46 in LM3S600 control chips
Outside other pins, those skilled in the art should will be apparent that its connected mode, in view of it is far with of the invention,
Here is omitted.
Figure 10 is control program flow chart in LM3S600 control chips shown in Fig. 9, is burnt in the LM3S600 control chips
The temperature signal control pin 46 for being formed with control program to utilize pin 21 to be input into is exported, and the flow of its control program includes：
Step A, judges whether the temperature signal being input into by pin 21 is less than 45 DEG C, if it is, performing step B, otherwise, holds
Row step C；
Step B, the control output heated current of pin 46, thermostatic heating plate generates heat under the function of current, real
Now to the intensification of gas-detecting cavity room 10, step C is performed；
Step C, judges whether the temperature signal being input into by pin 21 is equal to or higher than 45 DEG C, if it is, step D is performed,
Otherwise, step B is performed；
Step D, control pin 46 stops output heated current；
Generally, by the temperature change in the real-time monitoring gas-detecting cavity room of pin 21, also, exported by pin 46
Heated current be less than 5mA.
So far, combined accompanying drawing has been described in detail to the present embodiment.According to above description, those skilled in the art
Should have to infrared total hydrocarbon identification systems of the invention and clearly recognize.
Additionally, the above-mentioned definition to each element and method is not limited in embodiment various concrete structures, the shape mentioned
Shape or mode, those of ordinary skill in the art can simply be changed or be replaced to it, for example：(1) temperature adjustment of sheet
Device can also be changed to bulk form.
In sum, infrared total hydrocarbon identification systems of the invention pass through respective sensor sense ambient temperature, in environment temperature
During less than preset temperature, detection data is compensated using the environmental pressure and temperature, so as to improve the steady of detection data
Qualitative and reliability, for field geology mud logging techniques personnel have found oil gas and judge that oil and gas anomaly show to provide direct reference in time
Data.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., should be included in guarantor of the invention
Within the scope of shield.
Claims (2)
1. a kind of infrared total hydrocarbon identification systems, it is characterised in that including：
Gas-detecting cavity room (10)；
Infrared gas sensor (11), is sealed in the gas-detecting cavity room (10), for entering the gas-detecting cavity
Gas in room (10) carries out infrared optics detection；
Temperature sensor (12), is sealed in the gas-detecting cavity room (10), for entering the gas-detecting cavity room
(10) temperature of the gas in is detected；
Temperature-adjusting device (20), positioned at the gas-detecting cavity room (10) outward；And
Data acquisition compensation circuit (30), is connected with the temperature sensor (12) and the temperature-adjusting device (20), uses
When the temperature departure preset temperature detected when the temperature sensor (12) is interval, the temperature-adjusting device (20) is controlled
Temperature in the gas-detecting cavity room (10) is controlled, to stabilize it in the preset temperature is interval；
The temperature-adjusting device (20), in the sheet with a radian, is symmetrical two sheet metal, is fitted in described
The outside of gas-detecting cavity room (10), the area of its covering gas-detecting cavity room (10) is more than the gas-detecting cavity room (10)
The 40% of exterior surface area；
The interval scope between two preset temperatures of the preset temperature, the temperature-adjusting device is for while have heating work(
Can be with the aggregate of refrigerating function.
2. infrared total hydrocarbon identification systems according to claim 1, it is characterised in that the data acquisition compensation circuit (30)
Including：
Filter circuit module, is filtered for the temperature signal to temperature sensor；
Signal amplification module, is connected with the filter circuit module, for being amplified to the temperature signal that it is exported；
Analog-to-digital conversion module, is connected with the signal amplification module, and the temperature signal for being exported to it carries out analog-to-digital conversion；
And
Control chip, is connected with the analog-to-digital conversion module, for the temperature signal and the default temperature range that output it
It is compared, when it deviates preset temperature interval, controls the temperature-adjusting device (20) to the gas-detecting cavity room
(10) temperature in is adjusted, to stabilize it in the preset temperature is interval.
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| CN201410183091.7A CN104515744B (en) | 2014-04-30 | 2014-04-30 | Infrared total hydrocarbon identification systems |
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| CN201410183091.7A CN104515744B (en) | 2014-04-30 | 2014-04-30 | Infrared total hydrocarbon identification systems |
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| CN108444935B (en) * | 2018-03-21 | 2023-10-10 | 南京信息工程大学 | Temperature compensation method and compensation device for non-spectroscopic infrared gas sensor |
| CN111089849A (en) * | 2020-01-21 | 2020-05-01 | 成都千嘉科技有限公司 | System and method for preventing false alarm of NDIR alarm |
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| KR200445948Y1 (en) * | 2007-07-03 | 2009-09-11 | 엄기형 | Vertical type basement drainage system |
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| CN101852653A (en) * | 2010-05-18 | 2010-10-06 | 清华大学 | Device and method for measuring working temperature of bearing |
| CN101832923A (en) * | 2010-06-03 | 2010-09-15 | 中国石油集团川庆钻探工程有限公司长庆录井公司 | Infrared gas detection system suitable for oil-containing gas analysis of reservoir |
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