CN104933936A - Fully digital B-scan teaching demonstration instrument - Google Patents
Fully digital B-scan teaching demonstration instrument Download PDFInfo
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- CN104933936A CN104933936A CN201510378374.1A CN201510378374A CN104933936A CN 104933936 A CN104933936 A CN 104933936A CN 201510378374 A CN201510378374 A CN 201510378374A CN 104933936 A CN104933936 A CN 104933936A
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- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
- G09B23/286—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine for scanning or photography techniques, e.g. X-rays, ultrasonics
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Abstract
A fully digital B-scan teaching demonstration instrument comprises a box body. A printed circuit board is arranged in the box body. A fully digital B-scan teaching demonstration instrument circuit is arranged on the printed circuit board. The printed circuit board also includes an experiment state control keyboard, an experiment state number display zone, a reset button and a USB interface. A high-voltage analog switch unit circuit, a probe socket circuit, a high-voltage pulse generation circuit, a high-voltage isolation circuit, a DSC converter memory circuit, a video output circuit, a pseudo color output circuit, and a single-chip microcomputer control unit circuit are equipped with signal switching buttons. The probe socket circuit, the high-voltage pulse generation circuit, the DSC converter memory circuit, the video output circuit, the pseudo color output circuit and the single-chip microcomputer control unit circuit are provided with element plug sleeve members. The instrument is also equipped with an FPGA inner data output D/A converting circuit. The instrument can analyze and demonstrate the structure, principles and functions of a fully digital B-scan circuit in a multi-level and multi-direction manner to students, and helps the students to understand and grasp the theoretical knowledge about the circuit.
Description
Technical field
The present invention relates to instruments used for education, specifically a kind of digital B ultrasonic equipment for teaching.
Background technology
Be CN 203607016 U(day for announcing 2014-05-21 at China's notification number) utility model patent in disclose a kind of on-off type digital imaging system real training instrument.This real training instrument is intended to facilitate student's on-line testing and failture evacuation, only plays the hands-on training effect to B ultrasonic maintenance personal.Real training instrument in force, only divides by functional module digital B ultrasonic circuit, and on circuit, arranges limited manual on-off switch, the conducting of realizing circuit and open failure, intends the object reaching teaching.Like this, student singly can only see phenomenon of the failure from the fault that circuit disconnects, online acquisition, analysis and research cannot be carried out to the signal in circuit function module process, also the value of some elements and the duty of some element circuits cannot be converted, cause fully understanding that each element is in element circuit and element, the effect of element circuit in total system circuit and principle, the point and the face that obtain knowledge are not only few but also narrow.In addition, partial circuit accident design is unreasonable, such as connects " breakdown switch " in the input channel of buffer circuit, and it destructively may burn out circuit.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the invention provides a kind of digital B ultrasonic equipment for teaching, this equipment for teaching achieves the mutually auxiliary comprehensive teaching of Lung biopsy: the first, pre-set various " experimental state " stored in this Teaching instrument storer according to teaching demand.During teaching, state supervisory keyboard notice FPGA(field programmable gate array by experiment) " experimental state " of required xxx numbering, FPGA assigns to interrelated logic gate circuit " experimental state " that series of instructions transfers xxx numbering more respectively, and by service condition, the environment and running of its setting, show the numbering of current " experimental state " simultaneously.Press " reset " key after teaching, recover normal condition.The second, signalization switching key (SWITCH).The low and high level of switching signal, also changeable is outer signal input.When external simulating signal input, after amplification, analog to digital conversion, be input to FPGA, do signal transacting in FPGA inside, exported the node waveform of FPGA internal signal process by the digital to analog converter on external FPGA, the result of observation signal process, judges the quality of signal processing algorithm.Three, element plug external member is set.By resistance, inductance element plug, the element of different value can be changed, observe the change of image and test waveform, help student to understand resistance and inductance action principle in circuit.Four, setting data measurement module, can be exported the real time data of FPGA internal work by D/A converting circuit.This Teaching instrument can convert the data-signal of inner for FPGA any two functional units to analog signal output, and in the output signal of test lead with oscillograph testing DAC, real-time monitored signal waveform is also compared, and is convenient to study FPGA internal data.Five, USB interface is set.USB interface is directly connected with FPGA circuit, the initial numberical data (comprising view data) of the inner arbitrary processing unit circuit of FPGA can be gathered by PC.
The present invention realizes with following technical scheme:
A kind of digital B ultrasonic equipment for teaching, comprise casing, printed circuit board is provided with in described casing, described printed circuit board there is digital B ultrasonic equipment for teaching circuit, described digital B ultrasonic equipment for teaching circuit comprises FPGA circuit, high voltage analog switch element circuit, probe socket circuit, high-voltage pulse generating circuit, high_voltage isolation circuit, DSC converts memory circuitry, video output circuit, pseudo-colours output circuit, single chip control unit circuit, FPGA internal data exports D/A change-over circuit, described printed circuit board also comprises the experimental state supervisory keyboard for setting service condition, experimental state numbering viewing area, reset key and USB interface, described high voltage analog switch element circuit, probe socket circuit, high-voltage pulse generating circuit, high_voltage isolation circuit, DSC convert in memory circuitry, video output circuit, pseudo-colours output circuit and single chip control unit circuit and are provided with for switching signal low and high level or the signal switching button that switches to outer signal to input, described probe socket circuit, high-voltage pulse generating circuit, DSC convert in memory circuitry, video output circuit, pseudo-colours output circuit and single chip control unit circuit and are provided with for by resistance, inductance element plug, change the element plug external member of the element of different value.Described element plug external member comprises metal cannula and duplex banana plug.Described duplex banana plug comprises insulator foot, and described insulator foot center section has the stealthy groove of element, and insulator foot two ends are fixedly connected with metal solder post respectively, and described metal solder post is fixedly connected with banana plug.Described FPGA internal data exports D/A change-over circuit, is also data measurement module.That the real time data of FPGA internal work is converted to analog signal output by D/A converting circuit.Described USB interface is that FPGA circuit is directly connected with USB, is exported the initial numberical data of the inner process in real time of FPGA by this interface.
Described casing is connected through the hinge case lid, is provided with LCDs inside described case lid; Be provided with in described casing and support along platform, described support is provided with printed circuit board along on platform.
Beneficial effect of the present invention:
The present invention is as digital B ultrasonic circuit structure, the demonstration platform of principle and function, preset by " experimental state ", experimental state supervisory keyboard is transferred " experimental state ", signal switching button is to the switching of signal low and high level and external standard signal, element plug external member is to different value replacement of element, data measurement module carries out digital-to-analog conversion output to the arbitrary element circuit original signal data (comprising view data) of FPGA inter-process, USB interface is to five kinds of teaching methods such as directly to export of FPGA inter-process original signal numerical data, can be multi-level, multi-faceted to resolve and the structure of the digital B ultrasonic circuit of teaching to student, principle and function, student is helped to understand and grasp its knowwhy.
Accompanying drawing explanation
Fig. 1 is complete machine structure schematic diagram of the present invention;
Fig. 2 is mounted in the printed circuit board schematic diagram in casing;
Fig. 3 is metal cannula schematic diagram;
Fig. 4 is duplex banana plug schematic diagram;
Fig. 5 is high voltage analog switch element circuit;
Fig. 6 is probe socket circuit;
Fig. 7 is high-voltage pulse generating circuit;
Fig. 8 is high_voltage isolation circuit;
Fig. 9 is that DSC converts memory circuitry;
Figure 10 is video output circuit;
Figure 11 is pseudo-colours output circuit;
Figure 12 is single chip control unit circuit;
Figure 13 is that FPGA internal data exports D/A change-over circuit;
Figure 14 is schematic block circuit diagram;
101-case lid, 102-casing, 103-support along platform, 104-hinge, 105-LCDs, 200-printed circuit board, 201-experimental state supervisory keyboard, 202-experimental state numbering viewing area, 203-printed circuit board mounting hole, 204-probe socket, 205-reset key, 206-USB interface, 207-metal cannula mounting hole, 300-metal cannula, 400-duplex banana plug, 401-banana plug, the stealthy groove of 402-element, 403-metal solder post, 404-insulator foot.
Embodiment
Below in conjunction with accompanying drawing, by specific embodiment, technical solution of the present invention is described further.
As shown in Figure 1, a kind of digital B ultrasonic equipment for teaching, comprise case lid 101 and casing 102, casing 102 connects case lid 101 by hinge 104, is provided with LCDs 105 inside case lid 101; Be provided with in casing 102 and support along platform 103, support and be provided with printed circuit board 200 along on platform 103.
As shown in Figure 2, printed circuit board 200 surrounding, along having mounting hole 203, uses key screw printed circuit board 200 to be fixed on and supports along on platform 103.Printed circuit board 200 facial mask is printed on the schematic block circuit diagram of digital B ultrasonic equipment.Printed circuit board 200 is provided with probe socket 204, experimental state supervisory keyboard 201, experimental state numbering viewing area 202, reset key 205, USB interface 206 and metal cannula mounting hole 207.Probe socket 204 is for connecting probe.Experimental state supervisory keyboard 201 is used for switching between " experimental state " that each is preset, and experimental state numbering viewing area 202 simultaneous display experimental state is numbered.Reset key 205 is for returning to normal condition from the experimental state after the operation of enforcement " experimental state " supervisory keyboard.USB interface 206 is output interfaces of the inner real-time digital data of test FPGA.
As shown in Figure 3, metal cannula 300 tin welding is fixed in metal cannula mounting hole 207.Metal cannula mounting hole 207 uses in pairs in the present invention.
As shown in Figure 4, duplex banana plug 400 forms by with the insulator foot 404 of the stealthy groove 402 of element, metal solder post 403 and banana plug 401 3 part.During use, the welding of the two end electrodes of straight cutting resistance, straight cutting inductance is on two metal solder posts 403, and element is positioned in the stealthy groove 402 of element.Fig. 3 and Fig. 4 is plugged in together composed component plug external member; can by resistance, inductance element plug in circuit; change the element of different value, namely one dimension track or two dimensional image are used for resolving abstract theory intuitively in the change observing its element circuit output waveform and image.
Fig. 5 to Figure 12 is arranged for the experimental state supervisory keyboard 201 of teaching purpose design, signal switching button, element plug external member three kinds of teach modes, and these three kinds of teach modes arrange cross-distribution in these element circuits.
It is SWITCH that signal switching button is distributed in Fig. 5 to Figure 12.Element plug external member is distributed in Fig. 6, Fig. 7, Fig. 9 to Figure 12, is characterized as: resistance, the inductance of place in circuit, two end points by overstriking, and above it or below be provided with the those elements of non-place in circuit.
Composition graphs 5 describes in detail and how to pre-set " experimental state " and use experimental state supervisory keyboard 201 to go the teaching process of " experimental state ".Focal zone image shown by B ultrasonic display launches ultrasound wave by the gang's array element in transducer to focal area, and this gang's array element receives again the ultrasound wave of returning from focal area reflection and refraction simultaneously, is then converted to electric signal reimaging.In theory, array element many and few quality that directly decide imaging in gang.Thus, for the teaching of this knowledge point, we pre-set series " experimental state " stored in this novel Teaching instrument storer.The high voltage analog switch element circuit of Fig. 5 system 80 array element probe circuit prime.By programming to single-chip microcomputer and logical integrated circuit FPGA, the low and high level of control chart 5 circuit signal, make an array element or part array element or whole 80 array elements be in the combined crosswise of duty or off working state and duty and off working state respectively, corresponding different " experimental state " works out sequence number stored in storer.During teaching, according to instructional objective operation experiments state supervisory keyboard 201, namely notify " experimental state " of the required xxx numbering of the current teaching of FPGA, FPGA assigns series of instructions respectively to interrelated logic gate circuit again and transfers xxx numbering " experimental state " pre-set, and by service condition, the environment and running of its setting.Meanwhile, experimental state numbering viewing area 202, shows the xxx numbering of current " experimental state ".Image change in teaching process in observation display, and by oscillograph test respective waveforms.Complete the teaching to this element circuit.
Equally, according to teacher's teaching demand, Figure 12 single-chip microcomputer and logical integrated circuit FPGA are programmed, Fig. 6 to Figure 13 element circuit is set and is in " experimental state " of various teaching purpose stored in preparing against teaching teaching in storer.
As shown in Figure 7, high-voltage digital pulse producer pin one and the signalization switching key teaching of pin 3 place.This Teaching instrument has four high-voltage pulse generators (U3, U4, U15, U16), and principle of work is identical, corresponding CH0-CH15 altogether 16 passages signal export.Pin one and pin 3 are the two-way trigger pip of high-voltage digital pulse producer chip.Press the signal switching button at chip U3 pin one or pin two place, corresponding trigger pip can be made invalid, thus the signal sensitivity of output 4 passages (CH0-CH3) is reduced.If the signal switching button of two pins is pressed simultaneously, the blackout of 4 passages (CH0-CH3).In like manner, also corresponding operating can be implemented to U4, U15, U16.Image change in teaching process in observation display, and by oscillograph test respective waveforms.Complete the teaching to this element circuit.
Equally, the signal switching button SWITCH accessed in Fig. 5 to Figure 12 (except Fig. 8) circuit, pushes button, signal level sets low herein, can image change in observation display, and observe waveform in corresponding test point test, help student to understand analysis circuit principle.
As shown in Figure 8, this circuit is high_voltage isolation circuit, has 16 tunnels.In the buffer circuit of every road, access signal switching button (SWITCH), push button respectively, namely switch to outer signal to input.At this moment the standard analog signal that signal generator produces is accessed, FPGA is input to after amplification, analog to digital conversion, signal transacting is done in FPGA inside, the node waveform of FPGA internal signal process is exported by the digital to analog converter on external FPGA, the result of observation signal process, judges the quality of signal processing algorithm.
As shown in Figure 10, the teaching of element plug external member is set in figure.This circuit is video output circuit, in figure, be set to can plug for inductance L 140, the inductance of large, medium and small different value (in setting, value is the value of optimum matching) can be selected to insert circuit respectively, observe the sharpness of output image, whether there are hangover, diplopia, help student to understand the importance of this place coupling inductance.
Equally, in Fig. 6, Fig. 7, Fig. 9, Figure 11, Figure 12, be provided with can the resistance-inductance of plug in many places, change large, medium and small value respectively place in circuit, by survey the examination of output signal and results contrast is surveyed in examination, understand and grasp function in respective circuit of resistance, inductance and importance.
As shown in figure 13, setting data measurement module teaching.For FPGA internal data exports D/A change-over circuit in figure, also referred to as data measurement module, be that FPGA is connected with digital to analog converter DAC, FPGA internal data is converted to analog signal output.This Teaching instrument can convert the data-signal of inner for FPGA any two functional units to analog signal output, and in test lead TP82, TP83 or T84, the T85 output signal of oscillograph testing DAC, real-time monitored signal waveform also can be compared, be convenient to study FPGA internal data.
As shown in figure 14, high voltage analog switch element circuit, high-voltage pulse generating circuit, high_voltage isolation circuit, DSC conversion memory circuitry, video output circuit, pseudo-colours output circuit and single chip control unit circuit, FPGA internal data output D/A change-over circuit and UBS interface are connected respectively to the FPGA circuit for signal transacting, display and control, video output circuit connects high voltage analog switch element circuit, high-voltage pulse generating circuit connects high voltage analog switch element circuit, and single chip control unit circuit also connects the affiliated facilities such as external connection keyboard.
Claims (4)
1. a digital B ultrasonic equipment for teaching, comprise casing (102), printed circuit board (200) is provided with in described casing (102), described printed circuit board (200) there is digital B ultrasonic equipment for teaching circuit, described digital B ultrasonic equipment for teaching circuit comprises FPGA circuit, high voltage analog switch element circuit, probe socket circuit, high-voltage pulse generating circuit, high_voltage isolation circuit, DSC converts memory circuitry, video output circuit, pseudo-colours output circuit, single chip control unit circuit, it is characterized in that: described printed circuit board (200) also comprises the experimental state supervisory keyboard (201) for setting service condition, experimental state numbering viewing area (202), reset key (205) and USB interface (206), described high voltage analog switch element circuit, probe socket circuit, high-voltage pulse generating circuit, high_voltage isolation circuit, DSC convert in memory circuitry, video output circuit, pseudo-colours output circuit and single chip control unit circuit and are provided with for switching signal low and high level or the signal switching button that switches to outer signal to input, described probe socket circuit, high-voltage pulse generating circuit, DSC convert in memory circuitry, video output circuit, pseudo-colours output circuit and single chip control unit circuit and are provided with for by resistance, inductance element plug, change the element plug external member of the element of different value, described USB interface (206) is directly connected with FPGA circuit, described printed circuit board (200) also comprises and the FPGA internal data that the real-time digital data of FPGA internal work are converted to analog signal output by D/A converting circuit can be exported D/A change-over circuit.
2. a kind of digital B ultrasonic equipment for teaching according to claim 1, is characterized in that: described element plug external member comprises metal cannula (300) and duplex banana plug (400).
3. a kind of digital B ultrasonic equipment for teaching according to claim 2, it is characterized in that: described duplex banana plug (400) comprises insulator foot (404), described insulator foot (404) center section has the stealthy groove of element (402), insulator foot (404) two ends are fixedly connected with metal solder post (403) respectively, and described metal solder post (403) is fixedly connected with banana plug (401).
4. a kind of digital B ultrasonic equipment for teaching according to claim 1, is characterized in that: described casing (102) connects case lid (101) by hinge (104), and described case lid (101) inner side is provided with LCDs (105); Be provided with in described casing (102) and support along platform (103), described support is provided with printed circuit board (200) along on platform (103).
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| CN201510378374.1A CN104933936B (en) | 2015-07-01 | 2015-07-01 | A kind of digital B ultrasound equipment for teaching |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345311A (en) * | 2021-05-28 | 2021-09-03 | 广东工业大学 | Card-insertion type multifunctional test demonstration system |
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| CN204130033U (en) * | 2014-11-14 | 2015-01-28 | 张玉馥 | Modularized digital circuit engineering experiment table |
| CN204740790U (en) * | 2015-07-01 | 2015-11-04 | 徐州市双惠医疗设备有限公司 | Digital B ultrasonic teaching appearance |
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2015
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1342442A (en) * | 2000-09-13 | 2002-04-03 | 王雪乔 | Palm-type digitalized multifunctional ultrasonic diagnosing instrument |
| CN101540120A (en) * | 2007-07-26 | 2009-09-23 | 浙江天煌科技实业有限公司 | Network-based system and network-based method for automatically diagnosing experimental wiring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113345311A (en) * | 2021-05-28 | 2021-09-03 | 广东工业大学 | Card-insertion type multifunctional test demonstration system |
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