CN218470978U - Anti-interference radio wave perspective instrument receiver - Google Patents
Anti-interference radio wave perspective instrument receiver Download PDFInfo
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- CN218470978U CN218470978U CN202122580878.5U CN202122580878U CN218470978U CN 218470978 U CN218470978 U CN 218470978U CN 202122580878 U CN202122580878 U CN 202122580878U CN 218470978 U CN218470978 U CN 218470978U
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Abstract
The utility model relates to an anti-interference radio wave perspective instrument receiver, which comprises a receiving module, a signal amplifying module, a signal filtering module, a signal collecting module, a control processing module and a power supply module; the receiving module comprises an antenna tuning anti-interference circuit, the signal amplification module comprises a signal amplification anti-interference circuit, the signal filtering module comprises a filtering anti-interference circuit, the signal acquisition module comprises an acquisition anti-interference circuit, the antenna tuning anti-interference circuit is electrically connected with the signal amplification anti-interference circuit, the signal amplification anti-interference circuit is electrically connected with the filtering anti-interference circuit, and the filtering anti-interference circuit is electrically connected with the acquisition anti-interference circuit. Be different from prior art, the utility model discloses can improve the interference killing feature of radio wave perspective appearance receiver, can gather weak signal, improve detection distance and detection precision, obtain good effect in the field operation.
Description
Technical Field
The utility model relates to an electronic equipment circuit technical field, in particular to anti-interference radio wave perspective appearance receiver.
Background
The radio wave perspective instrument is mainly applied to mine safety production, related research and development are developed for the radio wave pit perspective instrument of a mine working face in China from the beginning of the 80 th 20 th century, and through research and application for nearly 50 years, a radio wave pit perspective technology is widely applied to structure detection of a mine stope working face, a certain result is obtained, and a certain guarantee is provided for efficient and safe production of a mine.
However, in the use process of radio wave perspective, under the condition that the emission energy of the transmitter is constant, signals transmitted to the receiving roadway are very weak in different detection objects and environments, and particularly in the construction process, differences of the electrical property and the surrounding environment of the detection objects include metal anchor nets, anchor rods, some production equipment, some surroundings only including coal, rock and the like, and the attenuation of effective signals is very weak due to the fact that metal has a shielding effect on radio waves. Therefore, whether the receiver can receive weak effective signals or not is very important, and the low noise and high anti-interference capability of the receiver are the key points of whether the receiver can receive the weak signals or not, so that the development of the radio wave perspective instrument receiver with low noise and high anti-interference capability is of great significance.
In the process of implementing the present invention, the inventor finds the following problems in the prior art:
in the prior art, weak signals are easily interfered by equipment circuits in the using process of a radio wave perspective instrument receiver, so that the problems of incapability of receiving, low acquisition precision, unreliable received data and the like are caused.
SUMMERY OF THE UTILITY MODEL
Therefore, an anti-interference radio wave perspective instrument receiver is needed to be provided for solving the technical problems that the radio wave perspective instrument receiver in the prior art is easily interfered by a device circuit, so that the radio wave perspective instrument receiver cannot receive data, the acquisition precision is low, and the received data is unreliable.
In order to achieve the above object, the inventor provides an anti-interference radio wave perspective instrument receiver, which comprises a receiving module, a signal amplifying module, a signal filtering module, a signal collecting module, a control processing module and a power supply module;
the receiving module, the signal amplifying module, the signal filtering module, the signal collecting module and the control processing module are sequentially connected, and the power supply module respectively supplies power to the signal amplifying module, the signal filtering module, the signal collecting module and the control processing module;
the receiving module comprises an antenna tuning anti-interference circuit, the signal amplification module comprises a signal amplification anti-interference circuit, the signal filtering module comprises a filtering anti-interference circuit, the signal acquisition module comprises an acquisition anti-interference circuit, the antenna tuning anti-interference circuit is electrically connected with the signal amplification anti-interference circuit, the signal amplification anti-interference circuit is electrically connected with the filtering anti-interference circuit, and the filtering anti-interference circuit is electrically connected with the acquisition anti-interference circuit.
Be different from prior art, the technical scheme of this application is through right receiving module signal amplification module signal filtering module signal acquisition module improves, through mutually supporting of antenna tuning anti jamming circuit, signal amplification anti jamming circuit, filtering anti jamming circuit, collection anti jamming circuit, is anti-jamming at each stage, improves the interference killing feature of radio wave perspective appearance receiver, can gather weak signal, has improved detection distance and detection precision, obtains good effect in the field operation.
As an embodiment of the present invention, the antenna tuning anti-jamming circuit includes a loop antenna and a variable capacitor, the loop antenna and the variable capacitor are connected in parallel. Therefore, the loop antenna and the variable capacitor are connected in parallel to form a parallel tuning frequency selection circuit, and the central frequency required by the receiver can be tuned by changing the value of the variable capacitor.
As an embodiment of the utility model, the anti-jamming circuit of signal amplification includes the middle amplifying unit of leading instrument amplifying unit and first order, variable capacitance with leading instrument amplifying unit is connected, leading instrument amplifying unit with amplifying unit is connected in the middle of the first order. Therefore, the signal can be amplified through the preposed instrument amplifying unit and then amplified again through the first-stage middle amplifying unit, and the amplification factor is improved.
As an embodiment of the utility model, the anti-jamming circuit of filtering includes amplifying unit in the middle of two narrow band filtering units and the second level, amplifying unit is connected with first narrow band filtering unit in the middle of the first level, first narrow band filtering unit with amplifying unit is connected in the middle of the second level, amplifying unit is connected with second narrow band filtering unit in the middle of the second level. Therefore, the signal can be filtered through the first narrow-band filtering unit, the second-stage middle amplifying unit is used for amplifying the signal, and the second narrow-band filtering unit is used for filtering the signal, so that the unnecessary frequency band can be filtered, and the detection precision of the receiver is improved.
As an embodiment of the utility model, gather anti-jamming circuit and include signal light isolation unit and gather anti-jamming unit, the second narrowband filtering unit with signal light isolation unit is connected, signal light isolation unit with gather anti-jamming unit and be connected. Thus, the interference generated during signal acquisition can be solved.
As an embodiment of the utility model, power module includes power filter, primary power filter circuit, keeps apart power supply circuit, secondary power supply filter circuit and little ripple power supply circuit, power filter primary power filter circuit keep apart power supply circuit secondary power supply filter circuit little ripple power supply circuit connects gradually. Therefore, the power filter and the primary power filter circuit filter the interference of external noise to the internal power circuit, the isolation power circuit is mainly used for isolating the power of the digital circuit and the analog circuit to prevent mutual interference between the digital circuit and the analog circuit, and the secondary power filter circuit and the small ripple power circuit filter and restrain the interference of the primary power to the secondary power supply.
As an embodiment of the present invention, the control processing module includes a primary side power supply circuit, a primary side control circuit, a primary side analog signal circuit, a photoelectric isolation circuit, a secondary side power supply circuit, a secondary side control circuit and a secondary side analog signal circuit, the primary side power supply circuit, the primary side control circuit, the primary side analog signal circuit respectively connect with the photoelectric isolation circuit, the secondary side power supply circuit, the secondary side control circuit, the secondary side analog signal circuit respectively connect with the photoelectric isolation circuit. Therefore, the photoelectric isolation circuit is adopted to isolate the analog signal, and the anti-interference performance is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any creative effort.
FIG. 1 is a system block diagram of a radiowave fluoroscopy receiver of one embodiment of the present application;
FIG. 2 is a schematic design diagram of a radiowave fluoroscopy receiver according to an embodiment of the present application;
FIG. 3 is a schematic design diagram of a power module according to an embodiment of the present application;
FIG. 4 is a schematic design diagram of a control processing module according to an embodiment of the present application;
FIG. 5 is a circuit diagram of an antenna tuning jammer circuit and a signal amplification jammer circuit according to an embodiment of the present application;
FIG. 6 is a circuit diagram of a filtering and jammer rejection circuit according to an embodiment of the present application;
FIG. 7 is a circuit diagram of an acquisition jammer rejection circuit according to one embodiment of the present application;
FIG. 8 is a circuit diagram of a control processing module according to one embodiment of the present application;
fig. 9 is a circuit diagram of a power module according to an embodiment of the present application.
Description of reference numerals:
1. a receiving module for receiving the data from the data processing module,
2. a signal amplification module for amplifying the signal received from the signal receiving module,
3. a signal filtering module for filtering the signal and outputting the filtered signal,
4. a signal acquisition module for acquiring a signal of a digital signal,
5. a control processing module for controlling the operation of the computer,
51. a power supply module for supplying power to the power supply module,
6. an antenna tuning anti-jamming circuit is provided,
7. a signal amplification anti-interference circuit,
8. a filtering and anti-jamming circuit is arranged in the filter,
9. an acquisition anti-interference circuit is connected with the acquisition anti-interference circuit,
10. a power supply filter for supplying power to the power supply,
12. a primary power supply filter circuit, a secondary power supply filter circuit,
14. the power supply circuit is isolated from the power supply circuit,
16. a secondary power supply filter circuit,
18. a small ripple power supply circuit, a high-frequency power supply,
19. a primary-side power supply circuit having a primary-side power supply circuit,
20. a primary-side control circuit for controlling the primary-side control circuit,
21. a primary side analog signal circuit for generating an analog signal,
23. a photoelectric isolation circuit is arranged on the substrate,
25. a secondary side power supply circuit, a power supply circuit,
26. a secondary side control circuit for controlling the secondary side of the transformer,
27. a secondary side analog signal circuit.
Detailed Description
In order to explain technical contents, structural features, objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in combination with the embodiments.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless otherwise specified or indicated; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present embodiment can be understood by those of ordinary skill in the art according to specific situations.
In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present application are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
In the prior art, weak signals are easily interfered by equipment circuits in the using process of a radio wave perspective instrument receiver, so that the problems of incapability of receiving, low acquisition precision, unreliable received data and the like are caused.
Therefore, the embodiment of the present application provides a technical solution, please refer to fig. 1 to 9, and the embodiment relates to an anti-interference radio wave perspective instrument receiver, which includes a receiving module 1, a signal amplifying module 2, a signal filtering module 3, a signal collecting module 4, a control processing module 5 and a power module 51, wherein the receiving module 1, the signal amplifying module 2, the signal filtering module 3, the signal collecting module 4 and the control processing module 5 are sequentially connected, and the power module 51 respectively provides power for the signal amplifying module 2, the signal filtering module 3, the signal collecting module 4 and the control processing module 5;
the receiving module 1 comprises an antenna tuning anti-jamming circuit 6, the signal amplification module 2 comprises a signal amplification anti-jamming circuit 7, the signal filtering module 3 comprises a filtering anti-jamming circuit 8, the signal acquisition module 4 comprises an acquisition anti-jamming circuit 9, the antenna tuning anti-jamming circuit 6 is electrically connected with the signal amplification anti-jamming circuit 7, the signal amplification anti-jamming circuit 7 is electrically connected with the filtering anti-jamming circuit 8, and the filtering anti-jamming circuit 8 is electrically connected with the acquisition anti-jamming circuit 9.
In this embodiment, through improving receiving module 1, signal amplification module 2, signal filtering module 3, signal acquisition module 4, through the mutually supporting of antenna tuning anti jamming circuit 6, signal amplification anti jamming circuit 7, anti jamming circuit 8 of filtering, collection anti jamming circuit 9, anti-jamming is carried out in each stage, improves the interference killing feature of radio wave perspective appearance receiver, can gather weak signal, has improved detection distance and detection precision, obtains good effect in the field operation.
In the embodiment, an antenna tuning anti-interference circuit port TX1 is connected with a weak signal amplification anti-interference circuit port TX 2; the port FD1 of the weak signal amplification anti-interference circuit is connected with the port FD2 of the filtering anti-interference circuit; and the port LB1 of the filtering anti-interference circuit is connected with the port LB2 of the high-speed acquisition anti-interference circuit.
In some embodiments, as shown in fig. 3 and fig. 9, the power module 51 includes a power filter 10, a primary power filter circuit 12, an isolation power circuit 14, a secondary power filter circuit 16, and a small ripple power circuit 18, and the power filter 10, the primary power filter circuit 12, the isolation power circuit 14, the secondary power filter circuit 16, and the small ripple power circuit 18 are connected in sequence. Thus, the power filter 10 and the primary power filter circuit 12 filter the interference of the external noise to the internal power circuit, the isolated power circuit 14 mainly isolates the power of the digital circuit and the analog circuit to prevent the mutual interference therebetween, and the secondary power filter circuit 16 and the small ripple power circuit 18 both filter and suppress the interference of the primary power to the secondary power supply.
In this embodiment, the power filter 10 selects BNX022-01L, and the primary side pi-type filter circuit is composed of two 47uF filter capacitors and one 120uH filter inductor, which mainly filters the interference of external noise to the internal power circuit; the isolation DC-DC power supply module selects a WRA0512CS-2W DC/DC isolation module, and is mainly used for isolating the power supplies of a digital circuit and an analog circuit and preventing mutual interference between the digital circuit and the analog circuit; the secondary side pi-shaped filter circuit is composed of two 47uF filter capacitors and a 120uH filter inductor, the small ripple power circuit 18 selects a KDT4594D positive and negative power module which is strong in customized interference suppression capability and low in noise, and interference of a primary side power supply to secondary side power supply is mainly suppressed.
In some embodiments, as shown in fig. 4, the control processing module 5 includes a primary-side power supply circuit 19, a primary-side control circuit 20, a primary-side analog signal circuit 21, a photo-isolation circuit 23, a secondary-side power supply circuit 25, a secondary-side control circuit 26, and a secondary-side analog signal circuit 27, wherein the primary-side power supply circuit 19, the primary-side control circuit 20, and the primary-side analog signal circuit 21 are respectively connected to the photo-isolation circuit 23, and the secondary-side power supply circuit 25, the secondary-side control circuit 26, and the secondary-side analog signal circuit 27 are respectively connected to the photo-isolation circuit 23. Therefore, the photoelectric isolation circuit 23 is adopted to isolate the analog signal, and the anti-interference performance is improved.
In this embodiment, the digital circuit power supply and the analog circuit power supply are both implemented by a WRA0512CS-2W DC/DC isolation module, the analog circuit control isolation is implemented by a TLP2358 or PC814D optoelectronic isolation chip, and the analog signal isolation is implemented by an analog optoelectronic isolation chip HCNR201-500E.
In some embodiments, as shown in FIG. 5, antenna tuning immunity circuit 6 includes a loop antenna and a variable capacitance, with the loop antenna connected in parallel with the variable capacitance. Therefore, the loop antenna and the variable capacitor are connected in parallel to form the parallel tuning frequency selection circuit, so that the functions of inhibiting interference signals and improving the signal-to-noise ratio are achieved, and the central frequency required by the receiver can be tuned by changing the value of the variable capacitor.
In this embodiment, the inductance of the loop antenna is fixed to 82uH, the variable capacitance ranges from 10pF to 540pF, and the center frequency of 500KHz required by this embodiment can be tuned by changing the value of the variable capacitance.
In some embodiments, the signal amplification anti-jamming circuit 7 includes a pre-meter amplifying unit and a first-stage intermediate amplifying unit, the variable capacitor is connected with the pre-meter amplifying unit, and the pre-meter amplifying unit is connected with the first-stage intermediate amplifying unit. Therefore, the signal can be amplified through the preposed instrument amplifying unit and then amplified again through the first-stage middle amplifying unit, and the amplification factor is improved.
In this embodiment, the weak signal amplification anti-interference circuit 7 includes one path of instrument amplification and two paths of intermediate amplification circuits, the first path selects AD8250 to form a differential instrument amplification circuit with gain of 1 time, 2 times, 5 times and 10 times, the first stage of the two paths of intermediate amplification circuits selects AD8021 to form a single-ended instrument amplification circuit with amplification factor of 100 times, and the second stage selects AD8428 to form a low-noise driving amplification circuit with amplification factor of 1000 times.
In some embodiments, as shown in fig. 6, the filtering and interference rejection circuit 8 includes two narrowband filtering units and a second intermediate stage amplifying unit, the first intermediate stage amplifying unit is connected to the first narrowband filtering unit, the first narrowband filtering unit is connected to the second intermediate stage amplifying unit, and the second intermediate stage amplifying unit is connected to the second narrowband filtering unit. Therefore, the signal can be filtered through the first narrow-band filtering unit, the second-stage middle amplifying unit is used for amplifying the signal, and the second narrow-band filtering unit is used for filtering the signal, so that the unnecessary frequency band can be filtered, and the detection precision of the receiver is improved.
In this embodiment, the filtering and anti-jamming circuit 8 selects two LTM260HW high-precision narrow-band filtering modules to form two analog filters with center frequency of 500 KHz.
In some embodiments, as shown in fig. 7, the acquisition anti-jamming circuit 9 includes a signal optical isolation unit and an acquisition anti-jamming unit, the second narrow-band filtering unit is connected to the signal optical isolation unit, and the signal optical isolation unit is connected to the acquisition anti-jamming unit. Thus, the interference generated during signal acquisition can be solved. In this embodiment, the high-speed acquisition anti-jamming circuit 9 selects the high-speed high-performance collector ADS7047 to form a high-speed acquisition circuit, and a general common-mode rejection and differential-mode filter circuit is designed before the AD collector, so that the acquisition rate of 3.0MSPS can be realized.
When the power supply works, the central frequency is 500KHz, and under the cooperation of the low-noise anti-interference power supply module, an effective measured value is obtained through the processing of the receiving module, the signal amplification module, the signal filtering module, the signal acquisition module and the control processing module.
The difference prior art, after this embodiment adopted above-mentioned scheme, improved detection distance and detection precision, obtained good effect in the field operation.
It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the protection scope of the present invention.
Claims (7)
1. An anti-interference radio wave perspective instrument receiver is characterized by comprising a receiving module, a signal amplifying module, a signal filtering module, a signal collecting module, a control processing module and a power supply module;
the receiving module, the signal amplifying module, the signal filtering module, the signal collecting module and the control processing module are sequentially connected, and the power supply module respectively provides power for the signal amplifying module, the signal filtering module, the signal collecting module and the control processing module;
the receiving module comprises an antenna tuning anti-interference circuit, the signal amplification module comprises a signal amplification anti-interference circuit, the signal filtering module comprises a filtering anti-interference circuit, the signal acquisition module comprises an acquisition anti-interference circuit, the antenna tuning anti-interference circuit is electrically connected with the signal amplification anti-interference circuit, the signal amplification anti-interference circuit is electrically connected with the filtering anti-interference circuit, and the filtering anti-interference circuit is electrically connected with the acquisition anti-interference circuit.
2. The jamming resistant radiowave fluoroscope receiver of claim 1, wherein the antenna tuning jamming immunity circuit comprises a loop antenna and a variable capacitance, the loop antenna being connected in parallel with the variable capacitance.
3. The receiver of claim 2, wherein the signal amplification and interference rejection circuit comprises a pre-instrumentation amplification unit and a first-stage intermediate amplification unit, the variable capacitor is connected to the pre-instrumentation amplification unit, and the pre-instrumentation amplification unit is connected to the first-stage intermediate amplification unit.
4. The antijamming radiowave fluoroscope receiver according to claim 3, wherein the filtering antijamming circuit comprises two narrow-band filtering units and a second-stage intermediate amplifying unit, the first-stage intermediate amplifying unit is connected with a first narrow-band filtering unit, the first narrow-band filtering unit is connected with the second-stage intermediate amplifying unit, and the second-stage intermediate amplifying unit is connected with a second narrow-band filtering unit.
5. The anti-jamming radiowave fluoroscope receiver according to claim 4, wherein the collection anti-jamming circuit comprises a signal optical isolation unit and a collection anti-jamming unit, a second narrow-band filtering unit is connected with the signal optical isolation unit, and the signal optical isolation unit is connected with the collection anti-jamming unit.
6. The anti-jamming radiowave fluoroscope receiver according to claim 1, wherein the power supply module comprises a power supply filter, a primary power supply filter circuit, an isolated power supply circuit, a secondary power supply filter circuit and a small ripple power supply circuit, the power supply filter, the primary power supply filter circuit, the isolated power supply circuit, the secondary power supply filter circuit and the small ripple power supply circuit being connected in sequence.
7. The anti-jamming radiowave fluoroscope receiver according to claim 1, wherein the control processing module comprises a primary side power supply circuit, a primary side control circuit, a primary side analog signal circuit, a photo-isolation circuit, a secondary side power supply circuit, a secondary side control circuit and a secondary side analog signal circuit, wherein the primary side power supply circuit, the primary side control circuit and the primary side analog signal circuit are respectively connected with the photo-isolation circuit, and the secondary side power supply circuit, the secondary side control circuit and the secondary side analog signal circuit are respectively connected with the photo-isolation circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122580878.5U CN218470978U (en) | 2021-10-26 | 2021-10-26 | Anti-interference radio wave perspective instrument receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122580878.5U CN218470978U (en) | 2021-10-26 | 2021-10-26 | Anti-interference radio wave perspective instrument receiver |
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| CN218470978U true CN218470978U (en) | 2023-02-10 |
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| CN202122580878.5U Active CN218470978U (en) | 2021-10-26 | 2021-10-26 | Anti-interference radio wave perspective instrument receiver |
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