CN112904772A - Special thick film circuit applied to electronic circuit precision measurement and signal processing - Google Patents
Special thick film circuit applied to electronic circuit precision measurement and signal processing Download PDFInfo
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- CN112904772A CN112904772A CN202110072543.4A CN202110072543A CN112904772A CN 112904772 A CN112904772 A CN 112904772A CN 202110072543 A CN202110072543 A CN 202110072543A CN 112904772 A CN112904772 A CN 112904772A
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- 238000012545 processing Methods 0.000 title claims abstract description 65
- 238000005259 measurement Methods 0.000 title claims abstract description 43
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21119—Circuit for signal adaption, voltage level shift, filter noise
Abstract
The invention discloses a special thick film circuit applied to electronic circuit precision measurement and signal processing, which comprises a double-channel analog quantity level amplifying circuit, a digital conversion unit, an intelligent digital processing unit, a signal isolation processing unit and a 32-pin double vertical in-line (DIP 32) thick film circuit, wherein the double-channel analog quantity level amplifying circuit is connected with the digital processing unit, the digital conversion unit is arranged in the intelligent digital processing unit, and the digital processing unit outputs a processed signal through the signal isolation processing unit. The method has the advantages of solving the problem of wider detection range capability and reducing the detection noise of the analog quantity level, thereby effectively improving the sensitivity of the detection signal.
Description
Technical Field
The invention relates to the technical field of precision measurement and signal processing, in particular to a special thick film circuit applied to precision measurement and signal processing of an electronic circuit.
Background
A thick film circuit is an integrated circuit formed by fabricating a passive network on the same substrate by using an array film process (screen printing, sintering, electroplating, etc.) and assembling discrete semiconductor devices, monolithic integrated circuits, or micro-devices. A film having a thickness of several micrometers to several tens of micrometers is generally considered to be a thick film, and materials for making the thick film are five kinds of pastes of a conductor, a resistor, a dielectric, an insulator, and an encapsulation. The thick film integrated circuit has simple and convenient process, low cost and larger power resistance, but the types and the numerical range of elements manufactured by the thick film integrated circuit have certain limits.
Disclosure of Invention
The present invention is directed to a special thick film circuit for precise measurement and signal processing of electronic circuits, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a be applied to electronic circuit precision measurement and signal processing's special thick film circuit, includes binary channels analog quantity level amplification circuit, digital conversion unit, intelligent digital processing unit, signal isolation processing unit and DIP32 thick film circuit, including binary channels analog quantity level amplification circuit connection digital processing unit, the inside digital conversion unit that is equipped with of intelligent digital processing unit, signal passing signal isolation processing unit output after intelligent digital processing unit will handle.
As a further technical scheme of the invention: the processing procedure of the digital processing unit is as follows: A. the signal digitization processing program discriminates signals by changing different detection sensitivities and changing the combination of different signal detection ranges, B, acquiring input level signals, automatically performing digitization slip filtering processing, C, automatically discriminating the amplitude of the input level signals and selecting the optimal measurement level basis to meet the requirements of the measurement range, D, performing multi-parameter slip filtering on the basis of average value filtering, and discriminating the signal amplitude again by using a threshold value; combining a baseline zero point and a multiple filtering method, performing baseline processing on the analog quantity signal, and E, ensuring that the error compression of the measurement signal is within the minimum detection limit; the accuracy of the full-range of the sampling signal is calibrated and corrected, F, the sampling signal is processed according to a digitization technology, the capability requirement of the minimum detection limit of signal processing is improved and met, namely, the digitization processing procedure process of the analog quantity signal is carried out, the contradiction of expanding the measurement range and improving the measurement sensitivity and accuracy is effectively solved, and the full-duplex serial digital communication with the isolation function is realized according to a designed communication protocol after the analog quantity signal is digitized.
As a further technical scheme of the invention: the dual-channel analog quantity level amplifying circuit comprises two groups of amplifiers, and each amplifying circuit has two different amplification times for the input level to output; and simultaneously, an analog quantity signal digital conversion unit is accessed and adopts a singlechip.
As a further technical scheme of the invention: a dual in-line 32 pin package is employed.
As a further technical scheme of the invention: the digital processing unit is a singlechip.
As a further technical scheme of the invention: the dual-channel analog quantity level amplifying circuit is a high input impedance amplifying circuit.
As a further technical scheme of the invention: the signal isolation processing unit is an RS3232 interface/USB interface.
Compared with the prior art, the invention has the beneficial effects that: the invention can be widely applied to the digital design of various detectors of instruments and meters related to level measurement, such as gas chromatography instruments; digital design of a double-light-path (measuring cell and reference cell) detector of a liquid chromatography instrument; the amplification digital design of various spectral signal detectors; designing a digital multimeter for high-precision measurement; designing a handheld gas flow detection instrument; the dual in-line special thick film circuit replaces the circuit design formed by a plurality of groups of auxiliary power supplies of an amplifying circuit and an ADC (analog to digital converter) conversion circuit data transmission circuit, and the measurement data is subjected to discrimination processing, baseline zero tracking, measurement amplitude accuracy automatic calibration and multiple filtering methods through a software method, so that the level signal measurement capability is improved. The method effectively solves the problems that the detection capability is wide in range, the baseline noise is reduced, and the detection sensitivity of the level signal is improved.
Drawings
FIG. 1 is a schematic diagram of an encryption system;
FIG. 2 is a schematic diagram of a gas chromatography apparatus with a dual channel detector connected for measurement use;
FIG. 3 is a schematic diagram of a spectroscopic analyzer or liquid chromatography UV detector measurement.
Fig. 4 is a flow chart of the method of the invention in intelligent digital detection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: referring to fig. 1-4, a special thick film circuit for precision measurement and signal processing of an electronic circuit includes a dual-channel analog level amplifying circuit, a digital conversion unit, a digital processing unit, a signal isolation processing unit and a DIP32 thick film circuit, wherein the dual-channel analog level amplifying circuit is connected to the digital processing unit, the digital processing unit is provided with the digital conversion unit therein, and the digital processing unit outputs the processed signal through the signal isolation processing unit.
The invention also comprises an analog quantity signal acquisition optimization method, wherein the same channel has two different proportional amplification times, the pre-amplification is carried out by B times aiming at weak level signals, so that the subsequent ADC conversion is easier to detect the weak level signals, the error requirement is correspondingly reduced, and the pre-amplification is carried out by A times aiming at larger level signals, so that the subsequent ADC conversion has enough signal detection range. Therefore, calibration curves of signals under different amplification factors are designed in a signal processing algorithm, pre-amplification B times and pre-amplification A times of the measured signals are guaranteed, the corresponding proportion of the obtained measured data is under the slope of the same K value, the accuracy of the measured data in the whole measuring range is guaranteed to be highly consistent, and the capability of a wider detection range is effectively achieved.
The processing procedure of the digital processing unit of the invention is as follows: A. the signal digitization processing program discriminates signals by changing different detection sensitivities and changing the combination of different signal detection ranges, B, acquiring input level signals, automatically performing digitization average value filtering and multi-parameter slip filtering, C, automatically discriminating the amplitude of the input level signals and selecting the optimal measurement level basis to meet the requirements of the measurement range, D, and discriminates the signal amplitude again by threshold values on the basis of the slip filtering; carrying out baseline processing on the analog quantity signal, and E, ensuring that the error compression of the measurement signal is within the minimum detection limit; the accuracy of the full-range of the sampling signal is calibrated and corrected, F, the sampling signal is processed according to a digitization technology, the capability requirement of the minimum detection limit of signal processing is improved and met, namely, the digitization processing procedure process of the analog quantity signal is carried out, the contradiction of expanding the measurement range and improving the measurement sensitivity and accuracy is effectively solved, and the full-duplex serial digital communication with the isolation function is realized according to a designed communication protocol after the analog quantity signal is digitized.
The dual-channel analog quantity level amplifying circuit comprises two groups of amplifiers, and each amplifying circuit has two different amplification times for the input level to output; and simultaneously, an analog quantity signal digital conversion unit is accessed and adopts a singlechip.
Example 2: on the basis of example 1: the thick film circuit of the invention adopts dual in-line 32 pin package. The digital processing unit is a singlechip. The dual-channel analog quantity level amplifying circuit is a high input impedance amplifying circuit. The signal isolation processing unit is an RS3232 interface/USB interface.
The invention is applied to a gas chromatography detector: as shown in fig. 2, the gas chromatography type detector has many different detectors, and the detection features are that weak electrical signals are measured and converted into different substances with high or low content, so that the form of electrical measurement signals is similar. The following examples are presented: signals of various detectors (1. hydrogen flame detector, 2. thermal conductivity detector) are input externally, and 3. the digital detection data processing is formed by the thick film circuit; 4. isolated output data interface: digitized signals of the hydrogen flame detector and the thermal conductivity detector), 5. an external input direct current power VCC1=3.3V, VCC2= (3.3-5) V.
Spectral-type detector applications: the spectrum instrument usually has a sample cell signal input and a measuring cell signal input, and according to the calculation of the sample cell signal and the measuring cell signal, parameters such as absorbance, transmittance and the like can be calculated to form a digital detector, and characteristics of different substances are measured and identified under different wavelengths. Outputting data: sample cell absorbance, reference cell absorbance, Au = LG ((sample cell) Au/(reference cell)); case as shown in fig. 3: externally inputting a sample cell signal and a silicon photocell signal (1 sample cell signal, 2 measuring cell signal) of a measuring cell, and 3. forming a digital detection data processing by a thick film circuit; 4. isolated output data interface: spectral measurement signal, 5. external input dc power VCC1=3.3V, VCC2= (3.3-5) V.
In the present embodiment, each of the modules and units is integrally embedded in "a dedicated thick film circuit applied to precision measurement and signal processing of an electronic circuit", and in practical applications, one detection target unit may be a physical unit of one electronic measurement type or a combination of (1-2) physical units of the electronic measurement type. In addition, in order to highlight the innovative part of the present invention, a unit which is not so closely related to solve the technical problem proposed by the present invention is not introduced in the present embodiment. It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (7)
1. The utility model provides a be applied to electronic circuit precision measurement and signal processing's special thick film circuit, includes binary channels analog quantity level amplification circuit, digital conversion unit, intelligent digital processing unit, signal isolation processing unit and DIP32 thick film circuit, its characterized in that, connect digital processing unit including binary channels analog quantity level amplification circuit, the inside digital conversion unit that is equipped with of digital processing unit, intelligent digital processing unit passes through signal isolation processing unit output with the signal after handling.
2. The special thick film circuit for precise measurement and signal processing of electronic circuits in claim 1, wherein the digital processing unit processes as follows: A. the signal digitization processing program discriminates signals by changing different detection sensitivities and changing the combination of different signal detection ranges, B, acquiring input level signals, automatically performing digitization multi-point average filtering and multi-parameter slip filtering, C, automatically discriminating the amplitude of the input level signals and selecting the optimal measurement level basis according to the automatic discrimination of the amplitude of the input level signals, so as to meet the requirements of the measurement range, D, and discriminates the signal amplitude again by using a threshold value on the basis of the multi-point average filtering and the multi-parameter slip filtering; combining a baseline zero point and a multiple filtering method, performing baseline processing on the analog quantity signal, and E, ensuring that the error compression of the measurement signal is within the minimum detection limit; the accuracy of the full-range of the sampling signal is calibrated and corrected, F, the sampling signal is processed according to a digitization technology, the capability requirement of the minimum detection limit of signal processing is improved and met, namely, the digitization processing procedure process of the analog quantity signal is carried out, the contradiction of expanding the measurement range and improving the measurement sensitivity and accuracy is effectively solved, and after the analog quantity signal is digitized, the full-duplex serial digital communication with the ground wire isolation function of the measurement signal is realized according to a designed communication protocol.
3. The special thick film circuit for precise measurement and signal processing of electronic circuits of claim 1, wherein the dual-channel analog level amplifying circuit comprises two groups of amplifiers, each amplifying circuit has two different amplification outputs for input level; and simultaneously, an analog quantity signal digital conversion unit is accessed and adopts a singlechip.
4. The special thick film circuit for precise measurement and signal processing of electronic circuits of claim 1, wherein a dual in-line 32-pin package is adopted.
5. The special thick film circuit applied to the precision measurement and signal processing of the electronic circuit as claimed in claim 1, wherein the intelligent digital processing unit is a single chip microcomputer.
6. The special thick film circuit for precise measurement and signal processing of electronic circuits according to claim 1, wherein the dual-channel analog level amplifying circuit is a high input impedance amplifying circuit.
7. The special thick film circuit applied to the precision measurement and signal processing of the electronic circuit as claimed in claim 6, wherein the signal isolation processing unit is a full-duplex serial interface.
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| CN202110072543.4A CN112904772A (en) | 2021-01-20 | 2021-01-20 | Special thick film circuit applied to electronic circuit precision measurement and signal processing |
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| CN204517785U (en) * | 2015-04-23 | 2015-07-29 | 天津市朝华电子技术有限公司 | A kind of electrode power supply and measurement Special thick film circuit |
| US20190043704A1 (en) * | 2016-04-01 | 2019-02-07 | Spectroswiss Sàrl | Data acquisition apparatus and methods for mass spectrometry |
| CN109685283A (en) * | 2019-01-07 | 2019-04-26 | 东华大学 | A kind of mineral hot furnace operating condition prediction technique based on confidence rule base reasoning |
| CN111166306A (en) * | 2020-01-23 | 2020-05-19 | 北京津发科技股份有限公司 | Physiological signal acquisition method, computer device and storage medium |
-
2021
- 2021-01-20 CN CN202110072543.4A patent/CN112904772A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204403A (en) * | 1995-10-31 | 1999-01-06 | 比奥特雷斯公司 | Ultralow background multiple photon detector |
| US20040188623A1 (en) * | 2003-03-25 | 2004-09-30 | Cti Pet Systems, Inc. | Baseline correction in PET utilizing continuous sampling ADCs to compensate for DC and count rate errors |
| CN101784741A (en) * | 2007-06-22 | 2010-07-21 | 西林克斯汽车系统公司 | Obstacle detection device, in particular a frame for a motorised opening panel of a motor vehicle, and resulting opening panel |
| CN102421354A (en) * | 2009-03-09 | 2012-04-18 | 科学与工业研究委员会 | Ecg device with impulse and channel switching adc noise filter and error corrector for derived leads |
| CN201464441U (en) * | 2009-07-31 | 2010-05-12 | 上海市计算技术研究所 | Digital UV detector |
| CN202871771U (en) * | 2012-10-23 | 2013-04-10 | 青岛汉源微电子有限公司 | Thick film integrated circuit of high-temperature processor |
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