CN105241602A - High-precision pressure acquisition method and system - Google Patents
High-precision pressure acquisition method and system Download PDFInfo
- Publication number
- CN105241602A CN105241602A CN201510676044.0A CN201510676044A CN105241602A CN 105241602 A CN105241602 A CN 105241602A CN 201510676044 A CN201510676044 A CN 201510676044A CN 105241602 A CN105241602 A CN 105241602A
- Authority
- CN
- China
- Prior art keywords
- pressure
- ripple
- signal
- difference
- pressure difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000001914 filtration Methods 0.000 claims abstract description 49
- 238000012360 testing method Methods 0.000 claims abstract description 21
- 230000002159 abnormal effect Effects 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 32
- 230000009467 reduction Effects 0.000 claims description 24
- 230000008878 coupling Effects 0.000 claims description 23
- 238000010168 coupling process Methods 0.000 claims description 23
- 238000005859 coupling reaction Methods 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000010009 beating Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000005070 sampling Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a high-precision pressure acquisition method and system. The method comprises the following steps: when the differential circuit is used for calculating the differential pressure, the differential pressure value is obtained after the coupled ripples of the collected signals are processed; and performing digital filtering on the differential pressure value, further filtering out signals with abnormal over-range, and displaying the filtered differential pressure value result as a final result. The method and the system solve the problem that the precision of pressure acquisition is improved by processing ripples through the differential circuit and the digital filtering algorithm, and further obtain high-precision acquired data and more accurate differential pressure test results in a low-cost and simple mode.
Description
Technical field
The present invention relates to liquid pressure measurement field, particularly relate to high-precision pressure acquisition method and system.
Background technology
When measuring/testing pipeline two ends water pressure difference, not yet there is the sensor of special pressure measurement difference in the market.Thus, then that normally measures water inlet pressure by water pressure sensor and measure mouth of a river pressure does difference, and carries out pressure reduction test.This pressure differential method of testing existing defects: due to two ends test to the data of pressure itself there is deviation/error, the deviation/error of the pressure reduction result so obtained can be larger.This method of testing is in power supply occasion of low quality, and can produce very large error, the result collected also can be made ceaselessly to beat, and namely measuring accuracy is too low.
Particularly, the existing formula of water pressure sensor (claiming pressure transducer below) test water pressure that utilizes is pressure value P=(Vout – 5)/2MP, wherein Vout is that pressure transducer gathers voltage, unit is volt (V), and pressure value P unit is MPa (MP); If after the test of this pressure transducer, the formula calculating water pressure difference is pressure difference value Δ P=(Vout2 – Vout1)/2MP, Vout1, Vout2 are respectively the collection voltage of the pressure transducer at package two ends, unit is volt (V), and pressure difference value Δ P unit is MPa (MP).When the pressure of package surveyed by pressure transducer, simple from pressure aspect, the pressure (as 10MP level) of MP level surveyed by pressure transducer, then error is maximum still can accept when 10KP, but survey package two ends water flow pressure and calculating pressure difference time, due to sluggish flow, in engineering, change and pressure difference value be generally smaller (as about 80KP) in very among a small circle for this pressure differential, the error of so error 10KP ~ 20KP just seems very large, can not receive.
And in actual applications, the power supply of pressure transducer test board is subject to the impact of Switching Power Supply ripple, generally in 200 millivolts (mV) left and right, this value replace pressure difference time be 10KP, during extreme case, this value can arrive 20KP, and this is just well beyond our expection.And, motherboard power supply power exist power supply ripple interference, sampled voltage result is fluctuated around actual value, the pressure mould analog quantity using AD acquisition chip to collect respectively by passage is not synchronous, because comprehensive power ripple is different from collection sequential, the pressure mould analog quantity obtained is not just determined value, and during calculating pressure difference, two pressure sequential are asynchronous, pressure differential neither stationary value, and the result finally calculated will be moved by beating heart.
Therefore, due to ripple that collect and transmit line is coupled with due to these two factors of pipeline flow instability, the unstable result that can cause collecting, error are large, and pressure test precision is too low, and the result finally calculated can ceaselessly be beated.
Summary of the invention
Fundamental purpose of the present invention is the defect overcoming above-mentioned prior art, a kind of high-precision pressure acquisition method and system is provided, to solve the problem being carried out the precision that adherence pressure gathers by difference channel and digital filtering algorithm process ripple, and then with low cost, easy mode, obtain high-precision image data, more accurately pressure reduction test result.
One aspect of the present invention provides a kind of high-precision pressure acquisition method, comprising: utilize difference channel when calculating pressure reduction, obtains pressure difference after the ripple of the coupling of process collection signal; Carry out digital filtering to described pressure difference, the signal of the abnormal over range of further filtering, shows through filtered pressure difference result as net result.
Wherein, utilize difference channel when calculating pressure reduction, pressure difference is obtained after the ripple of the coupling of process collection signal, comprising: the ripple of coupling of process collection signal, is when removing pressure acquisition, two transmission lines are subject to simultaneously the ripple signal of Switching Power Supply impact and the pressure difference that obtains after treatment.
Wherein, utilize difference channel when calculating pressure reduction, pressure difference is obtained after the ripple of the coupling of process collection signal, also comprise: when pressure reduction calculates, based on when carrying out the pressure acquisition at pipeline two ends with two pressure transducers, be equivalent to the power supply of pressure transducer, coupling ripple i.e. the constant amplitude of collection signal are equiphase, equiphase for constant amplitude ripple is subtracted each other, to filter out the ripple on pressure difference signal.
Wherein, utilize difference channel when calculating pressure reduction, pressure difference is obtained after the ripple of the coupling of process collection signal, also comprise: described difference channel adopts the function of the built-in difference block of the TM4C chip of TI producer, when utilizing this module to get rid of collection on two transmission lines simultaneously by the ripple signal that Switching Power Supply affects.
Wherein, digital filtering is carried out to described pressure difference, the signal of the abnormal over range of further filtering, show through filtered pressure difference result as net result, comprise: by the signal of described pressure difference by the abnormal over range of digital filtering algorithm filtering, to avoid beating of result of calculation, the pressure difference result finally obtained is stabilized in test result place, and shows as net result.
The present invention provides a kind of high-precision pressure acquisition system on the other hand, comprising: ripple device, for utilizing difference channel when calculating pressure reduction, obtains pressure difference after the ripple of the coupling of process collection signal; Filtration unit, for carrying out digital filtering to described pressure difference, the signal of the abnormal over range of further filtering, shows through filtered pressure difference result as net result.
Wherein, ripple device, comprising: the ripple of coupling of process collection signal, is when removing pressure acquisition, two transmission lines to be subject to simultaneously the ripple signal of Switching Power Supply impact and the pressure difference that obtains after treatment.
Wherein, ripple device, also comprise: when pressure reduction calculates, based on when carrying out the pressure acquisition at pipeline two ends with two pressure transducers, equivalent to the power supply of pressure transducer, coupling ripple i.e. the constant amplitude of collection signal are equiphase, and equiphase for constant amplitude ripple is subtracted each other, to filter out the ripple on pressure difference signal.
Wherein, ripple device, also comprises: described difference channel adopts the function of the built-in difference block of the TM4C chip of TI producer, when utilizing this module to get rid of collection on two transmission lines simultaneously by the ripple signal that Switching Power Supply affects.
Wherein, filtration unit, comprising: by the signal of described pressure difference by the abnormal over range of digital filtering algorithm filtering, to avoid beating of result of calculation, the pressure difference result finally obtained is stabilized in test result place, and shows as net result.
The solution of the present invention, by using the distinctive difference sampling functions of TM4C123GE6PZ chip internal of TI, (common mode ripple is as the one in harmonic wave for common mode ripple signal when calculating pressure difference signal, that common mode interference is coupled to the ripple that circuit produces) carry out filtering, and by digital filtering algorithm (such as: MCU chip or main control chip can be embedded in as in TM4C123GE6PZ chip in the mode of programming) to pressure transducer collect because the ripple that produces of water flow (pressure transducer does not have self ripple, the pressure difference value obtained finally measured by pressure transducer is by common mode ripple signal, the ripple that water flow produces, the coupling ripple of collection signal, and power supply ripple acting in conjunction generation) carry out filtering (such as: filtration treatment can be carried out by difference channel to signal such as the pressure difference value that pressure transducer collects), improving pressure signal acquisition precision such as pressure differential error controls at 0 ~ 2KP, improve the accuracy that pressure reduction calculates, and then with low cost, easy mode improves the test of pressure reduction.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram of an embodiment of high-precision pressure acquisition method of the present invention;
Fig. 2 is the built-in difference analogue converter of TM4C123GE6PZ of the solution of the present invention use and the schematic diagram of peripheral interface circuit one embodiment;
Fig. 3 is the structured flowchart of an embodiment of high-precision pressure acquisition system of the present invention;
Fig. 4 is the structured flowchart of an embodiment of difference channel embody rule in system of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with the specific embodiment of the invention and corresponding accompanying drawing, technical solution of the present invention is clearly and completely described.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
According to inventive embodiment, provide a kind of high-precision pressure acquisition method.The process flow diagram of an embodiment of high-precision pressure acquisition method of the present invention as shown in Figure 1.
In step S110, utilizing difference channel when calculating pressure reduction, after the ripple of the coupling of process collection signal, obtaining pressure difference.
Wherein, by the analog acquisition mouth of main control chip TM4C and in conjunction with external pressure sensor sample circuit, general pressure difference detection scheme can be realized, thus a kind of optimal way proposed to the inaccurate problem of sampled data in sampling process.
Wherein, the ripple of the coupling of process collection signal, can be ripple signal when removing pressure acquisition, two transmission lines being subject to simultaneously Switching Power Supply impact, thus obtain pressure difference after treatment.
Wherein, when carrying out the pressure acquisition at pipeline two ends with two pressure transducers, substantially be equivalent to the power supply of pressure transducer (voltage), coupling ripple i.e. the constant amplitude of collection signal are equiphase, can when pressure reduction calculates, the equiphase ripple of this part constant amplitude is subtracted each other, and filters out the ripple on pressure difference signal.
Further, difference channel (such as: can carry out force value collection by external pressure sensing and testing circuit, carry out hardware filtering by the difference block of chip internal, then carry out software filtering by program of writing embedded in chip and calculate pressure differential numerical value) function of the built-in difference block of the TM4C chip of TI producer of Texas Instrument can be adopted.Particularly, the M4 chip of the TM4C of TI provides solution for industry control level scene specially, inside is integrated with abundant analog quantity digital quantity converter ADC (analoguetodigitalconverter) resource, precision is at 12, simultaneously for Electric Machine Control, it contains orthogonal encoder, 4 tunnel PWM output signal in going back.
In one example in which, the application of difference channel can be very simple, as when testing the pressure differential of body two ends turnover saliva, can enter installation pressure transducer, install a pressure transducer in exit in import.Only need the electric wire of two sensors directly to receive in above-mentioned Acquisition Circuit, just can obtain the value (this value be the voltage signal of the force value collected by two sensors to be done by program at chip internal calculate) of pressure differential.
Such as: within precision can control to 0 ~ 3kp, the pressure differential error detected when not using the solution of the present invention is within-100kp to 100kp.Air-conditioning system to the accuracy requirement of package pressure at two ends difference within 10KP.
Such as: embody rule participates in the example shown in Fig. 4.Air-conditioning package (as air-conditioning package 310) two ends setting pressure sensor (as pressure transducer 320) in the diagram, the electric wire (as pressure transducer electric wire 330) of pressure transducer is connected in force samples module (as force samples module 340), the signal that the pressure of handle is corresponding like this passes in TM4C123GE6PZ, carries out programming to calculate the pressure differential at whole package two ends at TM4C123GE6PZ.By test when package does not have water flow (pressure transducer can be taken off from package yet and test as no-load condition), pressure differential should be zero.Use traditional detecting pattern, due to the impact of power supply ripple, pressure differential result of calculation is about 100KP, and when using method of the present invention to detect, pressure differential is within 3KP, can error just very little (such as: drop to 3KP from 100KP).
Here, directly use the ADC of TM4C123GE6PZ chip to gather built-in difference block and chip internal difference analogue amount to gather port and carry out doing difference operation.Such advantage is: when 1, TM4C123GE6PZ chip carries out logical process, just realize doing difference operation simply by TM4C123GE6PZ built-in chip type difference channel, be equivalent to do the attach feature that difference operation is this chip, save a large amount of peripheral hardware resource, without the need to bamboo product external subtraction circuit; 2, using this built-in chip type difference channel to do difference simultaneously can also the interference of filtering common mode signal, when namely utilizing this module to get rid of collection on two transmission lines simultaneously by the ripple signal that Switching Power Supply affects.The schematic diagram of one embodiment of the TM4C chip that the solution of the present invention shown in Figure 2 uses, which show the example that chip TM4C123GE6PZ built-in AD difference analogue converter and peripheral interface circuit (analog input end A, analog input end B) carry out signals collecting.
Wherein, common-mode signal is the one in ripple signal, and ripple can have common-mode signal and difference mode signal.Preferably the ripple of power supply common-mode signal is processed when above-mentioned filtering.
Such as: the pressure acquisition being carried out package two ends by the analog input end A in peripheral interface circuit and analog input end B, then by the difference channel that TM4C123GE6PZ is built-in difference operation is done to the pressure that analog input end A, B obtain respectively.
Here, TM4C123GE6PZ chip is MCU chip, is similar to the CPU of PC.The feature of TM4C123GE6PZ chip:
1,32-bitARMCortex-M4F processor cores
2, the operating frequency of 80M
3, outstanding processing power and quick-speed interruption response
4, the floating-point operation of IEEE754 standard is supported
5, code execution speed fast, allows use lower processor clock or use park mode
6, the Harvard structure based on instruction bus and data bus is used
7, built-in digital-to-analog conversion arithmetic element and digital operation unit
8, memory protect unit provides a kind of function of priority protection operating system
9, artificial debugging and debugging breakpoints and following function
10, low-power consumption is combined with park mode
11, abundant Peripheral Interface and external interrupt unit
In this chip, the API of analog to digital converter (ADC) provides one group of function to process ADC.This function can configure sample sequencer (samplesequencer), reads capture-data, register a sample sequence interrupt handling routine and process interrupt mask/removing.Analog to digital converter ADC supports up to 8 input channels and an internal temperature sensor.4 sample sequences, each have configurable trigger event, can be captured.First sequence will catch nearly 8 samplings, second and the 3rd sequence will catch and nearly sample for 4 times, the 4th sequence will be caught and once be sampled.Each sampling can be identical passage, different passages, or the combination of channels of any order.Sample sequence has configurable priority, determines when multiple triggering occurs simultaneously they with which kind of order are captured.The sequence of the limit priority of current triggering will be sampled.Must be noted that the frequent triggering (such as " always " triggers) occurred.If their priority is too high, the sequence of lower priority is so likely caused not to be sampled.This chip periphery has the analog input pin of 22, can combination of two become 11 pairs of difference samplings right, as handbook sectional drawing in following table 1.What the solution of the present invention by means of these 11 pairs of difference sampling centerings just dexterously carries out filtering and subtraction a pair.
Table 1:
| Differential pair | Analog input |
| 0 | 0 and 1 |
| 1 | 2 and 3 |
| 2 | 4 and 5 |
| 3 | 6 and 7 |
| 4 | 8 and 9 |
| 5 | 10 and 11 |
| 6 | 12 and 13 |
| 7 | 14 and 15 |
| 8 | 16 and 17 |
| 9 | 18 and 19 |
| 10 | 20 and 21 |
Thus, adopt difference channel process ripple, do not increase extra hardware and decrease cost, also reach the high precision object of collection.
In step S120, carry out digital filtering to described pressure difference, the signal of the abnormal over range of further filtering, shows through filtered pressure difference result as net result.
Wherein, sensor itself is the device as pressure acquisition, directly can achieve calculating and the filtering of pressure differential according to the subtraction characteristic of difference channel itself.Filtering algorithm is the software Processing Algorithm that the differential pressure data obtained the force value substitution pressure differential formula directly gathered is carried out.Based on collection is force value, obtains pressure differential by pressure differential computing formula.The difference block of chip internal is utilized to do software and hardware filtering.
Wherein, the pressure difference obtained after difference sampling, due to ripple that collect and transmit line is coupled and the unstable result of collection caused due to two factors of pipeline flow instability, thus the result calculated also can beat (result fluctuates), this result of calculation and pressure difference are done further computing by the digital filtering algorithm be embedded in later stage calculation processes, thus the signal of the abnormal over range of filtering, the pressure difference result finally obtained is stabilized in test result place, and shows as net result.Thus realize the accurate acquisition of pressure signal (pressure difference signal) further.
Fig. 3 schematically shows the structured flowchart of the embodiment according to high-precision pressure acquisition system of the present invention.According to one embodiment of present invention, this system can comprise:
Ripple device 210, for utilizing difference channel when calculating pressure reduction, obtains pressure difference after the ripple of the coupling of process collection signal.The concrete function of this device and process are see step S110.
Filtration unit 220, for carrying out digital filtering to described pressure difference, the signal of the abnormal over range of further filtering, shows through filtered pressure difference result as net result.The concrete function of this device and process are see step S120.
The process realized due to the system of the present embodiment and function are substantially corresponding to the chip example of the embodiment of the method shown in earlier figures 1,2, principle and use, therefore not detailed part in the description of the present embodiment, see the related description in previous embodiment, can not repeat at this.
The solution of the present invention, by using the distinctive difference sampling functions of TM4C123GE6PZ chip internal of TI, common mode ripple signal when calculating pressure difference signal carries out filtering, by digital filtering algorithm to pressure transducer self with because the ripple that water flow produces carries out filtering, improve pressure signal acquisition precision, improve the accuracy that pressure reduction calculates, and then effectively improve the test of pressure reduction with low cost, easy mode.Further, the solution of the present invention be applied in Practical Project, found by test result, can control at about 0 ~ 2KP by the impact of shape power supply ripple by pressure difference, clearly, meanwhile, the tripping problems of data result have also been obtained good solution to effect.
Also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, commodity or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, commodity or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment comprising described key element and also there is other identical element.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (10)
1. a high-precision pressure acquisition method, is characterized in that, comprising:
Utilizing difference channel when calculating pressure reduction, after the ripple of the coupling of process collection signal, obtaining pressure difference;
Carry out digital filtering to described pressure difference, the signal of the abnormal over range of further filtering, shows through filtered pressure difference result as net result.
2. the method for claim 1, is characterized in that, utilizes difference channel when calculating pressure reduction, obtains pressure difference, comprising after the ripple of the coupling of process collection signal:
The ripple of coupling of process collection signal when removing pressure acquisition, two transmission lines is subject to simultaneously the ripple signal of Switching Power Supply impact and the pressure difference that obtains after treatment.
3. method as claimed in claim 2, is characterized in that, utilizes difference channel when calculating pressure reduction, obtains pressure difference, also comprise after the ripple of the coupling of process collection signal:
When pressure reduction calculates, based on when carrying out the pressure acquisition at pipeline two ends with two pressure transducers, be equivalent to the power supply of pressure transducer, coupling ripple i.e. the constant amplitude of collection signal are equiphase, equiphase for constant amplitude ripple is subtracted each other, to filter out the ripple on pressure difference signal.
4. method as claimed in claim 3, is characterized in that, utilizes difference channel when calculating pressure reduction, obtains pressure difference, also comprise after the ripple of the coupling of process collection signal:
Described difference channel adopts the function of the built-in difference block of the TM4C chip of TI producer, when utilizing this module to get rid of collection on two transmission lines simultaneously by the ripple signal that Switching Power Supply affects.
5. the method as described in one of Claims 1-4, is characterized in that, carries out digital filtering to described pressure difference, the signal of the abnormal over range of further filtering, to show through filtered pressure difference result as net result, comprising:
By the signal of described pressure difference by the abnormal over range of digital filtering algorithm filtering, to avoid beating of result of calculation, the pressure difference result finally obtained is stabilized in test result place, and shows as net result.
6. a high-precision pressure acquisition system, is characterized in that, comprising:
Ripple device, for utilizing difference channel when calculating pressure reduction, obtains pressure difference after the ripple of the coupling of process collection signal;
Filtration unit, for carrying out digital filtering to described pressure difference, the signal of the abnormal over range of further filtering, shows through filtered pressure difference result as net result.
7. system as claimed in claim 6, it is characterized in that, ripple device, comprising:
The ripple of coupling of process collection signal when removing pressure acquisition, two transmission lines is subject to simultaneously the ripple signal of Switching Power Supply impact and the pressure difference that obtains after treatment.
8. system as claimed in claim 7, it is characterized in that, ripple device, also comprises:
When pressure reduction calculates, based on when carrying out the pressure acquisition at pipeline two ends with two pressure transducers, be equivalent to the power supply of pressure transducer, coupling ripple i.e. the constant amplitude of collection signal are equiphase, equiphase for constant amplitude ripple is subtracted each other, to filter out the ripple on pressure difference signal.
9. system as claimed in claim 8, it is characterized in that, ripple device, also comprises:
Described difference channel adopts the function of the built-in difference block of the TM4C chip of TI producer, when utilizing this module to get rid of collection on two transmission lines simultaneously by the ripple signal that Switching Power Supply affects.
10. the system as described in one of claim 6 to 9, is characterized in that, filtration unit comprises:
By the signal of described pressure difference by the abnormal over range of digital filtering algorithm filtering, to avoid beating of result of calculation, the pressure difference result finally obtained is stabilized in test result place, and shows as net result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676044.0A CN105241602A (en) | 2015-10-16 | 2015-10-16 | High-precision pressure acquisition method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676044.0A CN105241602A (en) | 2015-10-16 | 2015-10-16 | High-precision pressure acquisition method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105241602A true CN105241602A (en) | 2016-01-13 |
Family
ID=55039326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510676044.0A Pending CN105241602A (en) | 2015-10-16 | 2015-10-16 | High-precision pressure acquisition method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105241602A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246165A (en) * | 2016-08-02 | 2016-12-21 | 铜仁学院 | A kind of Seam Mining crack field gas pressure measurement structure |
| CN106525267A (en) * | 2016-12-16 | 2017-03-22 | 山东金洲科瑞节能科技有限公司 | Bus type temperature measuring device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201277898Y (en) * | 2008-10-30 | 2009-07-22 | 西安中星测控有限公司 | Double core differential pressure transmitter |
| CN101757709A (en) * | 2008-12-10 | 2010-06-30 | 北京谊安医疗系统股份有限公司 | Flow rate collection method and device thereof |
| CN202305099U (en) * | 2011-10-27 | 2012-07-04 | 威海市天罡仪表股份有限公司 | Pressure and differential pressure combined measuring and communication realizing system |
| CN102661828A (en) * | 2012-05-15 | 2012-09-12 | 广西壮族自治区气象减灾研究所 | High-precision air pressure automatic measuring device |
| CN202599593U (en) * | 2012-05-03 | 2012-12-12 | 中国海洋石油总公司 | Bus type double-path differential pressure sensor pressure acquisition circuit high-temperature integration module |
| CN103401404A (en) * | 2013-07-31 | 2013-11-20 | 矽力杰半导体技术(杭州)有限公司 | Noise eliminating method and noise eliminating circuit |
| JP2014009950A (en) * | 2012-06-27 | 2014-01-20 | Kyushu Institute Of Technology | Pressure detector and pressure detection sensor |
| CN104333333A (en) * | 2014-09-24 | 2015-02-04 | 晨星半导体股份有限公司 | Single-ended amplifier and noise elimination method thereof |
-
2015
- 2015-10-16 CN CN201510676044.0A patent/CN105241602A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201277898Y (en) * | 2008-10-30 | 2009-07-22 | 西安中星测控有限公司 | Double core differential pressure transmitter |
| CN101757709A (en) * | 2008-12-10 | 2010-06-30 | 北京谊安医疗系统股份有限公司 | Flow rate collection method and device thereof |
| CN202305099U (en) * | 2011-10-27 | 2012-07-04 | 威海市天罡仪表股份有限公司 | Pressure and differential pressure combined measuring and communication realizing system |
| CN202599593U (en) * | 2012-05-03 | 2012-12-12 | 中国海洋石油总公司 | Bus type double-path differential pressure sensor pressure acquisition circuit high-temperature integration module |
| CN102661828A (en) * | 2012-05-15 | 2012-09-12 | 广西壮族自治区气象减灾研究所 | High-precision air pressure automatic measuring device |
| JP2014009950A (en) * | 2012-06-27 | 2014-01-20 | Kyushu Institute Of Technology | Pressure detector and pressure detection sensor |
| CN103401404A (en) * | 2013-07-31 | 2013-11-20 | 矽力杰半导体技术(杭州)有限公司 | Noise eliminating method and noise eliminating circuit |
| CN104333333A (en) * | 2014-09-24 | 2015-02-04 | 晨星半导体股份有限公司 | Single-ended amplifier and noise elimination method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张福炎: "《全国计算机等级考试 考试指导（三级A）》", 30 November 1994 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246165A (en) * | 2016-08-02 | 2016-12-21 | 铜仁学院 | A kind of Seam Mining crack field gas pressure measurement structure |
| CN106525267A (en) * | 2016-12-16 | 2017-03-22 | 山东金洲科瑞节能科技有限公司 | Bus type temperature measuring device |
| CN106525267B (en) * | 2016-12-16 | 2023-08-01 | 山东金洲科瑞节能科技有限公司 | Bus type temperature measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101436046B (en) | Integrated multichannel synchronous oscillation data acquiring and monitoring and analysis diagnostic device | |
| CN103645457B (en) | A kind of on-site inspection device for electric energy meter | |
| CN203364966U (en) | High-precision and high-sensitivity optical power meter with large dynamic range | |
| CN105629052B (en) | Chip power-consumption real-time detection method | |
| CN102997979B (en) | Differential pressure flowmeter verification system | |
| CN105241602A (en) | High-precision pressure acquisition method and system | |
| CN205720565U (en) | A kind of batch testing plate for testing signal condition chip | |
| CN109944020A (en) | Method for detecting water consumption of washing machine, washing machine and computer readable storage medium | |
| CN103093078B (en) | A kind of data checking method improving 53H algorithm | |
| CN100385207C (en) | A low-cost intelligent vortex flowmeter signal processing system based on DSP | |
| CN103808463A (en) | Rotor jumping detector and test data processing method thereof | |
| CN109855798A (en) | A kind of portable pressure in-line calibration device based on PXI bussing technique | |
| CN113340369A (en) | Signal processing method and device for turbine fuel mass flowmeter | |
| CN102721878A (en) | Intelligentized automatic checkout device of quartz crystal oscillator instrument | |
| CN207439485U (en) | A kind of gear meter transmitter of CPLD+ARM | |
| CN203673058U (en) | Electric energy meter field inspecting apparatus | |
| CN110426028B (en) | Data processing control method of fiber-optic gyroscope | |
| CN115219000A (en) | Automatic calibration method and device for water level of medicine chest | |
| CN202885795U (en) | High-precision displacement measuring instrument | |
| CN106707833B (en) | Sampled signal auto-correction method, apparatus and system | |
| CN207132948U (en) | A fast and high-precision weighing instrument | |
| CN206192942U (en) | Little water wide range coulometer summation circuit for appearance | |
| CN214893474U (en) | Signal processing equipment of turbine fuel mass flow meter | |
| CN219347954U (en) | Signal transmitting module for measuring vibration signals | |
| CN205120262U (en) | Generating set temperature measuring system based on combined type digital filtering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |