CN109714926B - Novel long-line transmission system for weak signal acquisition and transmission - Google Patents
Novel long-line transmission system for weak signal acquisition and transmission Download PDFInfo
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Abstract
The application discloses a novel long-line transmission system for weak signal acquisition and transmission. The transmission system includes: the intelligent terminal is used for receiving and processing information, the detection device is used for collecting the information, and the detection device is connected with the intelligent terminal through the transmission plate; a plurality of detection plates are arranged in the detection device; the detection plate is provided with a first socket and a second socket; the plurality of detection boards are cascaded through the first socket and the second socket, and the first socket and the second socket on one detection board are connected by adopting a PCB wire. The method solves the technical problems that the weak signal has errors due to the fact that the interference of the space electromagnetic field is extremely easy to occur in the long line transmission process, the acquired signal is unstable due to the errors superimposed on the weak signal, and the interference is generated to the final imaging.
Description
Technical Field
The invention relates to the technical field of signal acquisition, in particular to a novel long-line transmission system for weak signal acquisition and transmission.
Background
The existing linear array X-ray signal acquisition and transmission system adopts a detection plate cascading mode, and a plurality of detection plates are cascaded in a daisy chain mode to form scanning arrays with different lengths for scanning objects and imaging. The detection plate and the transmission plate adopt long straight flat cables for transmission.
The existing long line transmission method has the defects that: the long line transmission process is extremely easy to be interfered by a space electromagnetic field, so that a weak signal has errors, and the errors superposed on the weak signal can cause unstable acquired signals and interfere with final imaging.
Aiming at the problems that in the related art, the long line transmission process is extremely easy to be interfered by a space electromagnetic field, so that an error exists in a weak signal, the acquired signal is unstable due to the error superposed on the weak signal, and the interference is generated on the final imaging, no effective solution is proposed at present.
Disclosure of Invention
The invention aims to provide a novel long-line transmission system for weak signal acquisition and transmission, which solves the problems that the weak signal has errors due to the fact that the interference of a space electromagnetic field is extremely easy in the long-line transmission process, the acquired signal is unstable due to the errors superimposed on the weak signal, and the interference is generated on final imaging.
In order to achieve the above object, according to one aspect of the present application, a novel long-line transmission system for weak signal acquisition and transmission is provided.
According to the invention, a novel long-line transmission system for weak signal acquisition and transmission comprises: the intelligent terminal is used for receiving and processing information, and the detection device is used for collecting the information and is connected with the intelligent terminal through a transmission plate; a plurality of detection plates are arranged in the detection device; the detection plate is provided with a first socket and a second socket; the plurality of detection boards are mutually cascaded through the first socket and the second socket, and the first socket and the second socket on one detection board are connected by adopting a PCB wire.
In some embodiments: the plurality of the detecting plates are connected with each other through long flat cables.
In some embodiments: the long flat cable is of a twisted pair structure.
In some embodiments: the interference potential in the two loops on the twisted pair is e1 and e2 respectively,
e1＝S1×(dB÷dt)，
e2＝S2×(dB÷dt)，
the disturbing potentials e1 and e2 are equal in magnitude and opposite in direction.
In some embodiments: the detection device is connected with the transmission plate through a long flat cable.
In some embodiments: the transmission plate is provided with a net opening.
In some embodiments: the transmission plate is connected with the intelligent terminal through a network cable.
In some embodiments: the number of the detection plates is 7.
In some embodiments: the detection device is L-shaped.
In some embodiments: a plurality of detection boards are cascaded in a daisy chain mode
The invention adopts the mode of adding the second socket and wiring through the PCB, and a plurality of detection plates are arranged in the detection device; the detection plate is provided with a first socket and a second socket; the plurality of detection boards are mutually cascaded through the first socket and the second socket, the first socket and the second socket on one detection board are connected through the PCB wiring, so that the purposes of weak signal acquisition and transmission are achieved, the technical effects of stable acquisition signals and clear imaging are achieved, the technical problems that the interference of a space electromagnetic field is extremely easy to occur in the long line transmission process, the weak signals have errors, the acquired signals are unstable due to the errors superimposed on the weak signals, and the interference is generated to final imaging are solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:
FIG. 1 is a block diagram of a conventional 5030 model X-ray signal acquisition and transmission system for a novel long-line transmission system for weak signal acquisition and transmission;
FIG. 2 is a block diagram of an improved 5030 model X-ray signal acquisition and transmission system for a novel long-line transmission system for weak signal acquisition and transmission according to the present invention;
FIG. 3 is a graph showing the time-dependent signal change of a detection point of a conventional long-line transmission method of the novel long-line transmission system for weak signal acquisition and transmission according to the present invention;
FIG. 4 is a diagram of a conventional long-line transmission method of the novel long-line transmission system for weak signal acquisition and transmission of the present invention;
FIG. 5 is a graph showing the time-dependent change of the signal at the detection point of the improved long-line transmission method of the novel long-line transmission system for weak signal acquisition and transmission according to the present invention;
fig. 6 is an image of an improved long-line transmission method of the novel long-line transmission system for weak signal acquisition and transmission of the present invention.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The terms "mounted," "configured," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The technical solutions of the present invention are described below in connection with specific embodiments, which should not be construed as limiting the technical solutions.
As shown in fig. 1-2, the present application relates to a novel long-line transmission system for weak signal acquisition and transmission. The system comprises: the intelligent terminal 5 is used for receiving and processing information, the detection device 6 is used for collecting information, and the detection device 6 is connected with the intelligent terminal 5 through the transmission plate 3; a plurality of detection plates are arranged in the detection device 6; the first socket 1 and the second socket 8 are arranged on the detection plate; the plurality of detection boards are cascaded through the first socket 1 and the second socket 8, and the first socket 1 and the second socket 8 on one detection board are connected by adopting PCB wiring.
Specifically, the intelligent terminal 5 refers to a computer, a tablet, a mobile phone and the like, and is used for realizing the functions of receiving signals and processing information; the detection device 6 is a device for detecting a detected object and can realize the function of signal acquisition; the detection device 6 is connected with the intelligent terminal 5 through the transmission plate 3, and the detection device 6 is electrically connected with the intelligent terminal 5 through the transmission plate 3, so that signal transmission can be realized; the transmission plate 3 is used for transmitting weak signals acquired by the plurality of detection plates to the intelligent terminal 5 through the network cable 4 while converting the weak signals; the detection device 6 is internally provided with a plurality of detection plates, so that high-precision detection can be realized by the plurality of detection plates, and a clearer image can be formed; the first socket 1 and the second socket 8 are arranged on the detection plate, and the first socket 1 and the second socket 8 are fixedly arranged on the detection plate, so that a foundation can be provided for physical connection among a plurality of detection plates; the plurality of detection plates are mutually cascaded through the first socket 1 and the second socket 8, so that the effect of connecting the plurality of detection plates with each other can be realized; the first socket 1 and the second socket 8 on one detection board are connected by adopting a PCB wire, and the PCB wire is connected, so that the area S surrounded by the signal on the detection board is almost negligible because the PCB wire is very small and the length is very short.
The specific working procedure of the invention is as follows:
as shown in fig. 1, a front-end detection board in the prior art is used to collect weak signals after the X-ray source 7 penetrates the package 8. And 7 detection plates are arranged in the closed detection device 6. "Board 1" is the first probe card, "Board 2" is the second probe card, and "Board 7" is the 7 th probe card. The detection boards are cascaded in the form of a long flat cable 2 through the first socket 1, and the transmission board 3 is used for transmitting weak signals acquired by a plurality of detection boards to convert and transmitting the weak signals to the intelligent terminal 5 through the network cable 4. The intelligent terminal 5 is used for receiving the digital signal uploaded by the transmission board 3, performing image processing and imaging.
As shown in fig. 1, a circuit formed by two signal wires in a long flat cable 2 is arranged in a dashed box, and an alternating-current interference magnetic field with induction intensity B passes through an area acdb enclosed by the flat cable, and the direction of the alternating-current interference magnetic field is shown in the figure. Induced potential e=s× (dB/dt) caused by B in acdb
In the method, in the process of the invention,
s- - -the area enclosed by the flat cable acdb, the longer the flat cable, the larger the area the greater the interference.
e-absolute error caused by alternating disturbing magnetic fields superimposed on the useful signal.
The same interference source may cause errors with the same property at different parts of the interfered object, and if the circuit of the interfered object has a special structure, the errors caused by the interference signals at the different parts can be equal in magnitude and opposite in direction, and the errors can be offset.
As shown in fig. 2, the front-end detection plate is used in the present application to collect weak signals after the X-ray source 7 penetrates the package 8. And 7 detection plates are arranged in the closed detection device 6. "Board 1" is the first probe card, "Board 2" is the second probe card, and "Board 7" is the 7 th probe card. The plurality of detection boards are connected through the long flat cable 2 in a mode of adding the second socket 8, the long flat cable 2 is in a twisted pair structure, and the first socket 1 and the second socket 8 on the detection boards are connected through PCB wiring; the transmission board 3 is used for transmitting weak signals acquired by the plurality of detection boards to convert and transmitting the weak signals to the intelligent terminal 5 through the network cable 4. The intelligent terminal 5 is used for receiving the digital signal uploaded by the transmission board 3, performing image processing and imaging.
The invention also has the following advantages:
since the PCB wiring is adopted, the length is short, and the area S enclosed by the signal on the detection board is almost negligible in interference. The twisted pair structure is adopted outside the detection board, so that interference can be mutually offset. Therefore, the novel long wire transmission method solves the problem that the anti-interference capability of the current long flat cable 2 transmission on a weak signal acquisition and transmission system is poor.
As shown in fig. 3-4, when a power frequency interference magnetic field with 50HZ exists in the space, the original signal collected by the detection board of the existing X-ray collection and transmission system will be interfered, when the integration time is 4ms, the time-varying curve of the detection point is as shown in fig. 3 below, and a period is formed at every 5 points, that is, a period is 20ms, and the interference signal with the frequency of 50HZ is superimposed on the effective signal. Meanwhile, the overstock chart is shown in fig. 4 below, and a significant vertical streak is observed on the image.
As shown in figures 5-6, when the system is constructed by adopting the long-line transmission method of the twisted pair, the curve of the change of the detection point along with time is shown as the following figure 5, and the curve is normal without a power frequency interference signal of 50 HZ. Meanwhile, the overstock is shown in the following fig. 6, and no vertical lines exist on the image. By adopting the long-line transmission method of twisted pair, the condition of vertical lines can be obviously improved, and the effect of reducing interference can be realized.
From the above description, it can be seen that the following technical effects are achieved:
the invention adopts the mode of adding the second socket 8 and wiring by a PCB, and a plurality of detection plates are arranged in the detection device 6; the first socket 1 and the second socket 8 are arranged on the detection plate; the plurality of detection boards are mutually cascaded through the first socket 1 and the second socket 8, and the first socket 1 and the second socket 8 on one detection board are connected by adopting a PCB wiring, so that the purposes of weak signal acquisition and transmission are achieved, the technical effects of stable acquisition signals and clear imaging are realized, the technical problems that the interference of a space electromagnetic field is extremely easy to occur in the long-line transmission process, the weak signals have errors, the acquired signals are unstable due to the errors superimposed on the weak signals, and the interference is generated to final imaging are solved.
Furthermore, a plurality of probe plates are connected to each other by the long flat cable 2. The plurality of detection plates are connected with each other through the long flat cable 2, so that the function of signal transmission can be realized, and the electric connection of the plurality of detection plates is further realized.
Wherein the long flat cable 2 is of a twisted pair structure. By adopting the twisted pair structure, the influence of induced potential in the circuit can be reduced, so that the stability of the system is improved, and the interference of final imaging is reduced.
Wherein, the interference potential in two loops on the twisted pair is e1 and e2 respectively,
e1＝S1×(dB÷dt)，
e2＝S2×(dB÷dt)，
the disturbing potentials e1 and e2 are equal in magnitude and opposite in direction. In the formula, S1 and S2 are left and right areas surrounded by twisted pairs, and obviously the interference potential superimposed on the effective signal is e1+ (-e 2), if the areas surrounded by the twisted pairs are equal: s1=s2, then |e1|= |e2|, the interference potentials e1 and e2 are equal in magnitude and opposite in direction, and cancel each other out, so that the effective signal is not affected by the interference magnetic field
Furthermore, the detection device 6 is connected to the transmission plate 3 via the long flat cable 2. The detection device 6 is connected with the transmission plate 3 through the long flat cable 2, so that the connection between the detection device 6 and the transmission plate 3 can be realized, and the transmission of electric signals is realized; as a preferable structure of the long flat cable 2 in this embodiment is a twisted pair structure, the influence of induced potential in the circuit can be reduced, so that the stability of the system is improved, and the interference of final imaging is reduced.
In addition, the transmission plate 3 is provided with a net opening. By providing the network port on the transmission plate 3, the function of interconnection with external devices can be achieved, thereby achieving signal transmission.
In addition, the transmission board 3 is connected to the intelligent terminal 5 through the network cable 4. The transmission plate 3 is connected with the intelligent terminal 5 in a connection mode of the network cable 4, so that weak signal boards acquired by a plurality of transmission detection plates are transmitted to the intelligent terminal 5 through the network cable 4.
In addition, the number of probe cards is 7. By setting the number of the detection plates to 7, multiple signal acquisition can be realized, so that imaging quality is improved.
In addition, the detection device 6 is L-shaped. By designing the shape of the detection device 6 into an L-shape, it is possible to realize an effect that is convenient for the object to be detected to pass through, and at the same time, it is also possible to realize detection.
Furthermore, a plurality of probe cards are cascaded in a daisy chain fashion. By adopting the daisy chain, which is a simplified cascading mode, the port for centralized management expansion can be realized.
The foregoing is merely one embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several similar modifications and improvements can be made without departing from the inventive concept, and these should also be considered as being within the scope of the present invention.
Claims (6)
1. A novel long-line transmission system for weak signal acquisition and transmission, comprising: the intelligent terminal (5) is used for receiving and processing information, the detection device (6) is used for collecting the information, the detection device (6) is connected with the intelligent terminal (5) through the transmission plate (3), and the detection device (6) is L-shaped; a plurality of detection plates are arranged in the detection device (6), the detection plates are connected with each other through long flat cables (2), the detection plates are cascaded in a daisy chain mode, and the long flat cables (2) are of twisted pair structures; the detection board is provided with a first socket (1) and a second socket (8); the plurality of detection boards are mutually cascaded through the first socket (1) and the second socket (8), and the first socket (1) and the second socket (8) on one detection board are connected by adopting PCB wiring.
2. The novel long wire transmission system for weak signal collection and transmission according to claim 1, wherein the interference potentials in the two loops on the twisted pair are e1 and e2, respectively, e1 = S1× (dB/dt), e2 = S2× (dB/dt), and the interference potentials e1 and e2 are equal in magnitude and opposite in direction.
3. The novel long wire transmission system for weak signal collection and transmission according to claim 1, wherein the detection device (6) is connected with the transmission plate (3) through a long flat cable (2).
4. The novel long-line transmission system for weak signal acquisition and transmission according to claim 1, wherein the transmission plate (3) is provided with a network port.
5. The novel long-line transmission system for weak signal acquisition and transmission according to claim 1, wherein the transmission board (3) is connected with the intelligent terminal (5) through a network cable (4).
6. The novel long-line transmission system for weak signal collection and transmission according to claim 1, wherein the number of the detection boards is 7.
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| CN201910156280.8A CN109714926B (en) | 2019-03-01 | 2019-03-01 | Novel long-line transmission system for weak signal acquisition and transmission |
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| CN201910156280.8A CN109714926B (en) | 2019-03-01 | 2019-03-01 | Novel long-line transmission system for weak signal acquisition and transmission |
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| US6173021B1 (en) * | 1997-06-23 | 2001-01-09 | Paradyne Corporation | Method and apparatus for reducing interference in a twisted wire pair transmission system |
| CN202837424U (en) * | 2012-08-17 | 2013-03-27 | 中国科学院等离子体物理研究所 | Photoelectric weak signal detection system |
| CN104793232A (en) * | 2015-04-29 | 2015-07-22 | 陕西迪泰克新材料有限公司 | Detection system and detection method |
| CN204556842U (en) * | 2015-04-29 | 2015-08-12 | 西安西凯化合物材料有限公司 | Linear array detector |
| CN205506865U (en) * | 2016-03-18 | 2016-08-24 | 奇点新源国际技术开发(北京)有限公司 | Test fixture needle bed and test equipment |
| CN207216042U (en) * | 2017-03-16 | 2018-04-10 | 江苏尚飞光电科技有限公司 | A kind of integrated X-ray detection device of luggage parcel safety check |
-
2019
- 2019-03-01 CN CN201910156280.8A patent/CN109714926B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6173021B1 (en) * | 1997-06-23 | 2001-01-09 | Paradyne Corporation | Method and apparatus for reducing interference in a twisted wire pair transmission system |
| CN202837424U (en) * | 2012-08-17 | 2013-03-27 | 中国科学院等离子体物理研究所 | Photoelectric weak signal detection system |
| CN104793232A (en) * | 2015-04-29 | 2015-07-22 | 陕西迪泰克新材料有限公司 | Detection system and detection method |
| CN204556842U (en) * | 2015-04-29 | 2015-08-12 | 西安西凯化合物材料有限公司 | Linear array detector |
| CN205506865U (en) * | 2016-03-18 | 2016-08-24 | 奇点新源国际技术开发(北京)有限公司 | Test fixture needle bed and test equipment |
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