CN202256239U - Three-dimensional electroconvulsive therapy (ECT) data acquisition system - Google Patents
Three-dimensional electroconvulsive therapy (ECT) data acquisition system Download PDFInfo
- Publication number
- CN202256239U CN202256239U CN2011203641894U CN201120364189U CN202256239U CN 202256239 U CN202256239 U CN 202256239U CN 2011203641894 U CN2011203641894 U CN 2011203641894U CN 201120364189 U CN201120364189 U CN 201120364189U CN 202256239 U CN202256239 U CN 202256239U
- Authority
- CN
- China
- Prior art keywords
- pole plate
- data acquisition
- acquisition system
- dimensional
- das
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The utility model relates to a three-dimensional electroconvulsive therapy (ECT) data acquisition system, which is formed by capacitance sensors, a data acquisition device and an upper computer. The capacitance sensors are pole plates adopting three-dimensional distribution, the pole plates are rectangular and arranged outside an circular pipeline, a screening cover is arranged outside the pipeline, the pole plates are arranged on three layers, each layer has four pole plates, the distance between two adjacent pole plates are equal, the two adjacent pole plates are distributed in a rotation type of 0-90 degrees, and grounded screening rings are arranged on two sides of the pole plates. The data acquisition device is formed by a main circuit board and peripheral equipment. The three-dimensional ECT data acquisition system improves speed of data acquisition, has the advantages of being simple in structure, strong in anti-jamming capability, apt to control of measurement accuracy and the like, and is applicable to popularization and application.
Description
Technical field
The utility model relates generally to a kind of capacitance chromatography imaging data acquisition system (DAS), and particularly a kind of three-dimensional ECT data acquisition system (DAS) based on C8051F700 belongs to the electrical capacitance tomography field.
Background technology
Capacitance tomography system need to be measured electric capacity between the pole plate that is evenly distributed on the industrial pipeline outer wall, and the capacitance variations that causes through medium obtains the visual information of pipe interior material or fluid.And capacitance is very little usually between pole plate; This body capacitance approximately at 0.01pF to about the 0.5pF, capacitance change is littler, and that stray capacitance and coupling capacitance etc. are measured disturbing factor is very big; Can reach tens to pico farads up to a hundred, this has just proposed very high requirement to the small capacitance testing circuit.
Traditional capacitance determining method has direct current to discharge and recharge and exchanges discrete element testing circuit such as C/V conversion, and switching rate is low, is difficult to satisfy the system real time requirement.Discrete element structure is complicated, is subject to external environmental interference, poor anti jamming capability; The circuit multi-channel switch is restive and bring more coupling capacitance to circuit when adopting parallel detection; The multichannel consistance is also bad, suppresses measuring accuracy, has a strong impact on image quality.And three-dimension sensor distributes, and capacitance is littler between pole plate, and required measurement range is bigger, and measurement capability is stronger, and this has just proposed bigger challenge for the measurement of ECT system capacitance.
Traditional capacitance data acquisition system ubiquity travelling speed is slow, complex structure, poor anti jamming capability, measuring accuracy are restive, be not suitable for a series of problems such as industrial environment application, needs to be resolved hurrily.
Summary of the invention
Goal of the invention:
The utility model provides a kind of three-dimensional ECT data acquisition system (DAS), overcome the defective that above-mentioned prior art exists, simple in structure, antijamming capability is strong, and has improved measuring accuracy.
Technical scheme:
A kind of three-dimensional ECT data acquisition system (DAS) is made up of capacitive transducer, data collector and host computer, it is characterized in that: said capacitive transducer is for adopting the pole plate of distributed in three dimensions; Pole plate is rectangle and the outside that is arranged on circular pipe, and the pipeline outside is provided with radome, and pole plate divides three layers of setting; Every layer is provided with four; Spacing between adjacent two pole plates equates that be 0～90 ° of rotary distribution in angle between the adjacent two layers pole plate, the pole plate both sides also are provided with the shading ring of ground connection; Said data collector is made up of main circuit board and peripherals.
The diameter of said pipeline is L, is coefficient with L/7.7, and the parameter of pole plate is: the pole plate height is: 2.5L/7.7, plate width is: 4 L/7.7, radial distance is between pole plate: 2 L/7.7, axial distance is between pole plate: 2 L/7.7.
Said main circuit board is made up of single-chip microcomputer and peripheral circuit thereof, and single-chip microcomputer is core with C8051F700, and peripheral circuit comprises plates capacitance input circuit, feed circuit, LED display circuit and serial ports output circuit.
Said peripherals is power supply and serial ports USB converter.
The main circuit board of said data collector is close to the pipeline outer wall setting, and near pole plate.
The main circuit board of said data collector and pipeline place radome inner in the lump.
Be the rotary distribution of 45 between the described adjacent two layers pole plate.
Advantage and effect:
The utility model provides a kind of three-dimensional ECT data acquisition system (DAS), is to the breakthrough and the improvement of traditional two-dimensional capacitance chromatography imaging data acquisition plan, has following advantage:
(1), utilize the pole plate distributed in three dimensions of sensor, the revolving method of reasonable space structure and layering for image reconstruction provides more fully and pipe interior information accurately, has improved the authenticity of image reconstruction.
(2), utilize the intrinsic advantage of C8051F700 chip, improved the speed of data acquisition greatly, for each input capacitance value, the high conversion rate of circuit can reach 40 μ s per input.Experiment shows that in the ideal case, for the capacitance chromatography imaging of 12 pole plates, system reconstructing speed can reach more than the 140 frame per seconds, has satisfied the real-time requirement of online pipeline detection.Because chip is multi-functional integrated, each item problem with few resource solution capacitive detection system makes whole hardware system structure simple, light, is easy to evade external environment near test subject, and antijamming capability is strong, and commercial Application is had better adaptability.
(3), system itself has and has certain stray capacitance and suppress ability and higher precision, under the situation of as far as possible removing external environmental interference, measure and approximately can be accurate to 0.01pf, for the image reconstruction quality provides assurance.
Description of drawings:
Fig. 1 is the capacitor sensor structure synoptic diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model main circuit board;
Fig. 3 is the utility model one-piece construction synoptic diagram.
Description of reference numerals:
1, pole plate; 11, radome; 12, pipeline; 13, shading ring; 2, main circuit board; 21, power supply; 22, serial ports USB converter; 23, electric capacity input port; L, pipe diameter.
Embodiment:
Below in conjunction with accompanying drawing the utility model is done further explanation:
Traditional capacitance data acquisition system ubiquity travelling speed is slow, complex structure, poor anti jamming capability, measuring accuracy are restive, be not suitable for a series of problems such as industrial environment application, needs to be resolved hurrily.
For the utility model adopts single-chip microcomputer C8051F700, utilize this chip capacity measurement module, high speed and highly integrated advantage address the above problem.
A kind of three-dimensional ECT data acquisition system (DAS), as shown in fig. 1, constitute by capacitive transducer, data collector and host computer; It is characterized in that: capacitive transducer is connected with host computer through data collector, and said capacitive transducer is for adopting the pole plate 1 of distributed in three dimensions, and pole plate 1 is rectangle and the outside that is arranged on circular pipe 12; Pipeline 12 outsides are provided with radome 11, pole plate three layers of setting in 1 fen, and every layer is provided with four; Totally 12 pole plates, the spacing between adjacent two pole plates equates, is 0～90 ° of rotary distribution in angle between the adjacent two layers pole plate; This anglec of rotation can be selected between 0～90 ° of angle according to actual needs, for example can select 0 ° of angle, 30 ° of angles; 60 ° of angles, 90 ° of angles or the like, best results when being the rotary distribution of 45 between the adjacent two layers pole plate.
In order to obtain pipe interior information comparatively accurately, through image reconstruction algorithm analysis and experimental verification repeatedly.
Through simulation analysis, when drawing pipe diameter and being 7.7cm, the pole plate height, width, radially, the ideal value of axial distance.With this group parameter value is standard, and according to the corresponding proportion of pipe diameter and normal diameter, with equal proportion ground convergent-divergent height, width radially, axial distance, thereby obtains pole plate size and the distribution parameter for different pipe diameters.
Following parameter is adopted in three-dimensional structure distribution for adopting 12 pole plates:
The diameter of pipeline 12 is L; As coefficient, for different pipe diameters, is standard with this coefficient with L/7.7; Can obtain the parameter of corresponding pole plate 1: the pole plate height is: 2.5L/7.7; Plate width is: 4 L/7.7, radial distance is between pole plate: 2 L/7.7, axial distance is between pole plate: 2 L/7.7.The parameter of pole plate is set like this, can obtains the information of pipeline 12 inside more exactly.
For example: when pipe diameter was 7.7cm, the ideal parameters of pole plate was: pole plate height 2.5cm, plate width 4cm, radial distance 2cm between pole plate, axial distance 2cm.
Be the circuit theory diagrams (being 12 pole plate inputs among the figure) of data collector main circuit board as shown in Figure 2, main circuit board 2 is made up of single-chip microcomputer and peripheral circuit thereof; Single-chip microcomputer is core with C8051F700; Peripheral circuit comprises plates capacitance input circuit, feed circuit, LED display circuit and serial ports output circuit.
Said peripherals is power supply 21 and serial ports USB converter 22.
The main circuit board 2 of said data collector is close to pipeline 12 outer wall settings, and is positioned as close to pole plate 1.
The main circuit board 2 of said data collector also can place radome 11 inside with pipeline 12 in the lump, is provided with like this and can reduces the stray capacitance that shielding line brings.
It shown in Fig. 3 the one-piece construction synoptic diagram of the utility model; Shown in figure, the utility model in use, capacitive transducer is the pole plate 1 that pipeline 12 outer walls are provided with; Be connected the once corresponding electric capacity input port of each pole plate with electric capacity input port 23 through shielding line.Power supply 21 is a 5v left and right sides dc power supply, is the single-chip microcomputer power supply through the AMS1117 voltage stabilizer.C8051F700 contains 32 electric capacity input ports, can select and the same number of port of pole plate, and each pole plate is through the corresponding connection with port of shielding line, as the input of single-chip microcomputer.C8051F700 is built-in with capacitive sensor modules; In working order down; Can select the ground connection pole plate through coding; Single-chip microcomputer can once obtain the capacitance of this pole plate and other pole plates, and under the effect of capacitive transducer CDC (conversion of electric capacity digital quantity) module, capacitance is converted to the digital quantity with 16 precision.For each input capacitance value, the high conversion rate of circuit can reach 40 μ s per input.Experiment shows that in the ideal case, for the capacitance chromatography imaging of 12 pole plates, system reconstructing speed can reach more than the 140 frame per seconds, has satisfied the real-time requirement of online pipeline detection.By single-chip microcomputer to these digital quantities carry out filtering, relatively wait necessary processing after, again data are directly passed to host computer through serial input and output pin and serial ports USB converter 22, and carry out data communication between the host computer.Data collector passes to host computer with sampled data, and accepts the control of host computer.Wherein the main circuit board 2 of data collector is close to pipeline 12 outer wall settings, and is not far apart from pole plate 1 array, and is positioned as close to pole plate 1, to reduce the shielding line distance.Also can pipeline 12 be placed the inside of radome 11 in the lump together with main circuit board 2, the benefit that is provided with like this is to reduce the interference to circuit of stray capacitance that shielding line brings and external environment.Under the situation of as far as possible removing external environmental interference, measure and approximately can be accurate to 0.01pf, for the image reconstruction quality provides reliable assurance.
The utility model can also be programmed through the testing software of host computer; Be used for reading and store test results, the upper end of operation interface provides a series of options, can be to port; The software and hardware filter times; The ground connection pole plate, single channel and scanning sample measurement pattern are selected, and realize man-machine interaction preferably.Can also be through the selection adjustment measuring accuracy of filter times, filter times comprises hardware filtering and software filtering.The hardware filtering function is inner at C8051F700, has 1,4,8,16 time, can realization be set through register.Software filtering realizes that through measurement result multiple averaging multiple averaging can improve result's precision and stability greatly.
Single channel operation or entire scan pattern also can be selected by testing software.The single channel operation can obtain capacitance between certain passage pole plate and other each pole plates.In the measuring process, taking scan pattern more, can disposablely read the capacitance between each pole plate and other all pole plates, is that two field picture reconstruction provides complete capacitance in the short time.This chip capacity picking rate is fast, has satisfied the system real time requirement to a great extent.The capacitance that host computer obtained is not an actual capacitance value, but capacitance and stray capacitance sum between pole plate, so will zero-suppress a little.The utility model adopts the standard electric looks to demarcate, record each pole plate under the empty pipe condition between the standard capacitance value.With each pole plate under the trystate blank pipe capacitance is deducted standard value again, draw the fixedly stray capacitance between every pair of pole plate.Each time measurement result all deducts this fixed value, is offered the plates capacitance value of reconstruction algorithm really.
The real-time sampling result is that capacitance can be presented at intermediate interface with the form of calcspar between ground connection pole plate and other pole plates, is presented at the right side of intermediate interface with data mode.All previous sampled result is recorded in the lower left corner at interface.After each sampling finishes, click the saving result on right side, can capacitance preserved with the form of text, through zero-suppressing point processing, offer image reconstruction algorithm again, carry out image reconstruction.
The utility model provides a kind of three-dimensional ECT data acquisition system (DAS), travelling speed is fast, simple in structure, antijamming capability strong, measuring accuracy is easy to control, be fit to industrial environment uses.
Claims (7)
1. three-dimensional ECT data acquisition system (DAS); Be made up of capacitive transducer, data collector and host computer, it is characterized in that: said capacitive transducer is for adopting the pole plate (1) of distributed in three dimensions, and pole plate (1) is rectangle and the outside that is arranged on circular pipe (12); Pipeline (12) outside is provided with radome (11); Pole plate (1) divides three layers of setting, and every layer is provided with four, and the spacing between adjacent two pole plates equates; Be 0～90 ° of rotary distribution in angle between the adjacent two layers pole plate, pole plate (1) both sides also are provided with the shading ring (13) of ground connection; Said data collector is made up of main circuit board (2) and peripherals.
2. a kind of three-dimensional ECT data acquisition system (DAS) according to claim 1; It is characterized in that: the diameter of said pipeline (12) is L; With L/7.7 is coefficient, and the parameter of pole plate (1) is: the pole plate height is: 2.5L/7.7, and plate width is: 4 L/7.7; Radial distance is between pole plate: 2 L/7.7, axial distance is between pole plate: 2 L/7.7.
3. a kind of three-dimensional ECT data acquisition system (DAS) according to claim 1; It is characterized in that: said main circuit board (2) is made up of single-chip microcomputer and peripheral circuit thereof; Single-chip microcomputer is core with C8051F700, and peripheral circuit comprises plates capacitance input circuit, feed circuit, LED display circuit and serial ports output circuit.
4. a kind of three-dimensional ECT data acquisition system (DAS) according to claim 1 is characterized in that: said peripherals is power supply (21) and serial ports USB converter (22).
5. a kind of three-dimensional ECT data acquisition system (DAS) according to claim 1 is characterized in that: the main circuit board of said data collector (2) is close to pipeline (12) outer wall setting, and near pole plate (1).
6. according to claim 1 or 5 described a kind of three-dimensional ECT data acquisition system (DAS)s, it is characterized in that: the main circuit board of said data collector (2) places radome (11) inside in the lump with pipeline (12).
7. a kind of three-dimensional ECT data acquisition system (DAS) according to claim 1 is characterized in that: be the rotary distribution of 45 between the described adjacent two layers pole plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203641894U CN202256239U (en) | 2011-09-27 | 2011-09-27 | Three-dimensional electroconvulsive therapy (ECT) data acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203641894U CN202256239U (en) | 2011-09-27 | 2011-09-27 | Three-dimensional electroconvulsive therapy (ECT) data acquisition system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256239U true CN202256239U (en) | 2012-05-30 |
Family
ID=46117461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203641894U Expired - Fee Related CN202256239U (en) | 2011-09-27 | 2011-09-27 | Three-dimensional electroconvulsive therapy (ECT) data acquisition system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202256239U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445469A (en) * | 2011-09-27 | 2012-05-09 | 沈阳工业大学 | Three-dimensional ECT (Emission Computed Tomography) data acquisition system |
| EP2784494A1 (en) | 2013-03-26 | 2014-10-01 | Rechner Industrie-Elektronik GmbH | System for detecting and/or determination of bodies or materials |
| CN104969064A (en) * | 2013-02-01 | 2015-10-07 | 诺克索莱有限公司 | Method and apparatus for determining the location of an interface of interest, and computer program |
| CN106018500A (en) * | 2016-08-01 | 2016-10-12 | 清华大学深圳研究生院 | Capacitance sensor and measurement system |
-
2011
- 2011-09-27 CN CN2011203641894U patent/CN202256239U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445469A (en) * | 2011-09-27 | 2012-05-09 | 沈阳工业大学 | Three-dimensional ECT (Emission Computed Tomography) data acquisition system |
| CN104969064A (en) * | 2013-02-01 | 2015-10-07 | 诺克索莱有限公司 | Method and apparatus for determining the location of an interface of interest, and computer program |
| EP2784494A1 (en) | 2013-03-26 | 2014-10-01 | Rechner Industrie-Elektronik GmbH | System for detecting and/or determination of bodies or materials |
| CN106018500A (en) * | 2016-08-01 | 2016-10-12 | 清华大学深圳研究生院 | Capacitance sensor and measurement system |
| CN106018500B (en) * | 2016-08-01 | 2019-02-22 | 清华大学深圳研究生院 | A kind of capacitance sensor and measuring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102445469B (en) | Three-dimensional ECT (Emission Computed Tomography) data acquisition system | |
| CN103164054B (en) | Wireless condenser type writing device | |
| CN103925935B (en) | Capacitive sensor means | |
| CN202256239U (en) | Three-dimensional electroconvulsive therapy (ECT) data acquisition system | |
| CN103645170B (en) | A kind of device utilizing Raman spectrum to detect tumour character | |
| CN203299112U (en) | Agricultural product quality multi-spectral imaging and detecting device | |
| CN203798912U (en) | Portable electric field instrument system for site selection | |
| CN104635254A (en) | Portable gamma spectroradiometer | |
| CN102313777B (en) | Detection apparatus for defects of inner and outer walls of pipeline based on remote field eddy current | |
| CN105911107A (en) | Standing tree crack detecting device and method based on resistance tomography | |
| CN103743334A (en) | Resistance strain gauge | |
| CN101937297A (en) | Apparatus using a differential analog-to-digital converter | |
| CN101216333A (en) | Capacitance type angle sensor calibration apparatus | |
| CN104635266A (en) | Multi-dimensional set display method and multi-dimensional set display system based on offset-azimuth angle domain | |
| CN104280114A (en) | Portable hydroelectric generating set vibration and swing degree data detecting system and method | |
| CN103542962A (en) | Pressure testing device | |
| CN205280114U (en) | Electric automobile electrical resolver decoding circuit output signal accuracy testing system | |
| CN103675680A (en) | Detector and detection method for locomotive motor optical-electricity encoder | |
| CN204142613U (en) | A kind of high precision small dust sensor | |
| CN202904029U (en) | Low-power nuclear signal pulse amplitude analyzer | |
| CN104570039A (en) | Weak-radioactivity detection device and method | |
| CN105809165A (en) | Method of using a meter reading platform to automatically read meters on electric energy meter | |
| CN107479579A (en) | A kind of spacing detection method and system of the framework photoelectric stable platform of two axle four | |
| CN103149541A (en) | Method for extracting weak signals in magnetic field measurement | |
| CN105629026A (en) | LabVIEW-based electrostatic potential detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20130927 |