Signal collecting and screening device

Abstract

The utility model discloses a signal acquisition and screening device, comprising an antenna which is arranged outside a shielding laboratory when in use and is used for receiving signals; the shielding shell is arranged in a shielding laboratory when being used, the shielding shell is provided with an input end and an output end, and the antenna is connected with an input port of the input end; the navigation filter is arranged in the shielding shell and is connected with the output port of the input end; the communication filter is arranged in the shielding shell and is connected with the output port of the input end; the input port of the pre-amplifier is respectively connected with the output ports of the navigation filter and the communication filter, and the output port of the pre-amplifier is connected with the input port of the output end; and the output end is used for outputting the signal to a to-be-tested sample. The device receives external real satellite navigation signals and mobile communication signals through the antenna, the signals are processed through the navigation filter and the communication filter, and required signals are screened out and amplified through the signal amplifier to form a signal source for detecting a sample to be detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to signal detection technical field, concretely is a signal collection screening device. BACKGROUND

[0002] This is an intelligent driving beginning era, with navigation technology, communication technology development and fusion, future car also needs more intelligent, networked. With the application of car navigation and communication components on the car more and more, the test requirement of this part is also higher and higher, and the application pays more attention to safety, stability. High precision, reliable, comprehensive test system can bring great flexibility and convenience for research and development personnel and production test personnel.

[0003] Satellite navigation system and communication system are the cornerstone of intelligent driving, and the accurate position and space-time information provided throughout the whole link of perception, decision-making and control. With technology iteration and ecological improvement, it will promote autonomous driving from assisted driving to complete unmanned driving and reconstruct the efficiency and safety of future transportation systems.

[0004] In laboratory testing, there are still differences between simulated signals and actual signals. For the functional operation of the product, it is more inclined to use actual satellite navigation signals and communication signals to realize its navigation and data exchange functions. Customers require real navigation satellite signal and satellite quantity requirements, and need to connect 2G, 4G to access specific data center platform for real-time communication and monitoring. However, there are too many signals in the actual environment, and the method of extending the line directly cannot avoid various noise interference. SUMMARY

[0005] In order to overcome the defects in the prior art, the utility model provides a signal collection screening device, which receives real satellite navigation signals and mobile communication signals from the outside through an antenna, processes the signals through a navigation filter and a communication filter, amplifies the required signals through a signal amplifier to form a signal source for detecting the sample to be tested.

[0006] Therefore, a device needs to be developed to filter and amplify the collected signals at a specific frequency, and then introduce them into the shielding laboratory for use by the customer's equipment.

[0007] To achieve the above purpose, the technical scheme adopted by the utility model is: a signal collection screening device for providing a signal source for a sample to be tested in a shielding laboratory, comprising:

[0008] An antenna is arranged outside the shielding laboratory during use for receiving signals;

[0009] A shielding shell is arranged inside the shielding laboratory during use, the shielding shell is provided with an input end and an output end, and the antenna and the input port of the input end are connected;

[0010] A navigation filter is arranged in the shielding shell and connected with the output of the input end;

[0011] A communication filter is arranged in the shielding shell and connected with the output of the input end;

[0012] An input of a preamplifier is connected with the outputs of the navigation filter and the communication filter respectively, and an output of the preamplifier is connected with an input of the output end;

[0013] The output end is used for outputting signals to a sample to be tested.

[0014] According to the above technical scheme, the device receives the real satellite navigation signals and mobile communication signals from the outside through the antenna, processes the signals through the navigation filter and the communication filter, amplifies the required signals through the signal amplifier to form a signal source for detecting the sample to be tested. In addition, the navigation signals and the communication signals are different in frequency and modulation mode, so the navigation filter and the communication filter are arranged to process the satellite navigation signals and the mobile communication signals respectively, so as to avoid mutual interference between the signals.

[0015] Further, the antenna has at least two, which are divided into a navigation signal antenna and a communication signal antenna. The navigation signal antenna is used for receiving satellite navigation signals, and the communication signal antenna is used for receiving mobile communication signals. Since the navigation signals and the communication signals are different in frequency and modulation mode, if a comprehensive antenna is used, the navigation signals may be interfered by the communication signals, resulting in inaccurate positioning, or the communication signals may be affected by the navigation signals, resulting in problems such as reduced call quality and data transmission errors. Using two independent antennas can effectively avoid mutual interference between the two signals.

[0016] Further, the shielding shell has at least two input ends, which are divided into a first input end and a second input end. The navigation signal antenna is connected with the first input end, the communication signal antenna is connected with the second input end, the navigation filter is connected with the first input end, and the communication filter is connected with the second input end. Since the navigation signals and the communication signals are different in frequency and modulation mode, the satellite navigation signals and the mobile communication signals are input into the corresponding navigation filter and communication filter respectively, so as to avoid mutual interference between the signals.

[0017] Further, the navigation filter at least includes a GPS bandpass filter and a BDS bandpass filter;

[0018] The communication filter at least includes a 2G bandpass filter, a 4G bandpass filter and a 5G bandpass filter. The multiple filters are arranged to enable the signal collection and screening device to adapt to various test samples.

[0019] Further, the pre-amplifier has at least two, divided into a first pre-amplifier and a second pre-amplifier, the first pre-amplifier and the first input end are connected, and the second pre-amplifier and the second input end are connected. Because the frequencies, modulation methods and the like of the navigation signals and the communication signals are different, the satellite navigation signals and the mobile communication signals are separated and output, so as to avoid mutual interference between the signals.

[0020] Further, the shielding shell is provided with at least two output ends, divided into a first output end and a second output end, the first output end and the first pre-amplifier are connected, and the second output end and the second pre-amplifier are connected. Because the frequencies, modulation methods and the like of the navigation signals and the communication signals are different, the satellite navigation signals and the mobile communication signals are separated and output, so as to avoid mutual interference between the signals.

[0021] Further, the first switch and the second switch are included, the first switch includes at least two access pins and an output pin, the access pins are respectively connected with the GPS bandpass filter and the BDS bandpass filter, and the output pin is connected with the first pre-amplifier.

[0022] The second switch includes at least three access pins and an output pin, the access pins are respectively connected with the 2G bandpass filter, the 4G bandpass filter and the 5G bandpass filter, and the output pin is connected with the second pre-amplifier.

[0023] Through the above scheme, the corresponding filter can be connected according to the demand of the test sample, so as to adapt to the operation mode of multi-card multi-communication and composite navigation, and only a single signal can be output, so as to further improve the signal-to-noise ratio.

[0024] Further, the navigation filter is arranged between the first pre-amplifier and the first output end, and the communication filter is arranged between the second pre-amplifier and the second output end. After the filtered signals are pre-amplified, in order to avoid that some noise is also amplified, resulting in that the signals are not pure enough, the filter is arranged between the pre-amplifier and the output end again, so as to further remove the interference signals, so as to ensure that the signals output to the test sample are not interfered.

[0025] Further, the antenna and the input port of the input end are connected through a shielding line. The shielding line can introduce external interference signals into the ground, so as to protect the satellite navigation signals or the mobile communication signals transmitted in the inside from being interfered.

[0026] Further, at least one side of the shielding shell is openable and closable.

[0027] By means of the above technical scheme, the application has the following beneficial effects:

[0028] The signal acquisition and screening device disclosed by the application receives real satellite navigation signals and mobile communication signals from the outside through an antenna, processes the signals through a navigation filter and a communication filter, amplifies the required signals through a signal amplifier to form a signal source for detecting a to-be-tested sample, and can test the to-be-tested sample using a real signal source and reduce experimental cost compared with the expensive analog base station equipment in the traditional scheme.

[0029] The filter in the application includes a GPS band-pass filter, a BDS band-pass filter, a 2G band-pass filter, a 4G band-pass filter and a 5G band-pass filter, and the corresponding filter can be selected according to the actual demand of the test sample through a switching switch to improve the signal-to-noise ratio.

[0030] In order to make the above and other objects, features and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0032] Fig. 1 is the overall device structure schematic diagram of the signal acquisition and screening device in the embodiment of the application;

[0033] Fig. 2 is the structure schematic diagram of the signal acquisition and screening device in the embodiment of the application.

[0034] Fig. 3 is a scheme schematic diagram of testing a to-be-tested sample using the signal acquisition and screening device in the embodiment of the application.

[0035] The reference numerals in the above drawings are as follows: 1, navigation signal antenna; 2, communication signal antenna; 3, shielding shell; 31, first input end; 32, second input end; 33, first output end; 34, first output end; 41, GPS band-pass filter; 42, BDS band-pass filter; 51, 2G band-pass filter; 52, 4G band-pass filter; 53, 5G band-pass filter; 61, first preamplifier; 62, second preamplifier; 71, first switching switch; 72, second switching switch; 8, shielding laboratory; 8, sample to be tested. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] It should be noted that, in the description of the present application, the terms "first", "second", etc. are only used for description purposes and to distinguish similar objects, and there is no sequence between the two, nor can it be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0038] Embodiment: combined with Figs. 1-3 As shown in the drawings, a signal acquisition and screening device is disclosed in the embodiment, which is used to provide a signal source for a sample to be tested 9 in a shielding laboratory 8, comprising:

[0039] The navigation signal antenna 1 and the communication signal antenna 2 are arranged outside the shielding laboratory 8, the navigation signal antenna 1 is used to receive satellite navigation signals, and the communication signal antenna 2 is used to receive mobile communication signals. Because the frequencies and modulation methods of navigation signals and communication signals are different, if a comprehensive antenna is used, the navigation signal may be interfered by the communication signal, resulting in inaccurate positioning, or the communication signal may be affected by the navigation signal, resulting in problems such as reduced call quality, data transmission errors, etc. Using two independent antennas can effectively avoid mutual interference between the two signals.

[0040] The navigation signal antenna 1 and the communication signal antenna 2 are connected to the screening device respectively, the screening device includes a shielding shell 3, the shielding shell 3 is arranged in a shielding laboratory 8, and one side of the shielding shell 3 is provided with a closable door body.The shielding shell 3 is provided with two input ends, the input port of the input end is located outside the shielding shell 3, and the output port of the input end is located inside the shielding shell 3.The input end is divided into a first input end 31 and a second input end 32, the input port of the navigation signal antenna 1 and the first input end 31 is connected through a shielding line, and the input port of the communication signal antenna 2 and the second input end 32 is connected through a shielding line.The shielding line can introduce external interference signals into the ground, so as to protect the satellite navigation signal or mobile communication signal transmitted inside from being disturbed.

[0041] The output port of the first input end 31 is connected with a first navigation filter, the first navigation filter is arranged in the shielding shell 3, and the first navigation filter is used for filtering the satellite navigation signal received by the navigation signal antenna 1.At present, intelligent driving mostly uses GPS navigation system or Beidou satellite navigation system, and the GPS system uses signals of multiple frequency bands, such as L1 (1575.42 MHz), L2 (1227.6 MHz), L5 (1176.6 MHz) and the like, and the BDS also has its own signal frequency band.In order to avoid the mutual influence of the signals of the GPS navigation system and the Beidou satellite navigation system, the first navigation filter includes a GPS band-pass filter 41 and a BDS band-pass filter 42 in parallel.The GPS band-pass filter is designed for specific frequency bands of the GPS system, has very low in-band loss, can efficiently pass the GPS signal, and has very high out-of-band suppression, so that the interference signals of the surrounding frequency bands can be effectively suppressed.The BDS band-pass filter is designed according to the frequency characteristics and transmission requirements of the Beidou satellite navigation system signal, and can ensure the stable transmission and accurate reception of the Beidou signal, has good frequency selectivity and anti-interference ability, and is suitable for different application scenarios and environments.

[0042] The output port of the second input end 32 is connected with a first communication filter, the first communication filter is arranged in the shielding shell 3, and the first communication filter is used for filtering the mobile communication signal received by the communication signal antenna 2.At present, intelligent driving mostly uses cellular network communication, and the cellular network communication is divided into 2G, 4G, 5G and the like.In order to adapt to various needs of the to-be-tested sample 9 and avoid mutual interference of signals of different frequency bands, the first communication filter includes a 2G band-pass filter 51, a 4G band-pass filter 52 and a 5G band-pass filter 53 in parallel, and the arrangement of multiple filters can adapt to different needs of different test samples.

[0043] Through the above scheme, since the navigation signal and the communication signal are different in frequency, modulation mode and the like, the first navigation filter and the first communication filter are arranged to process the satellite navigation signal and the mobile communication signal respectively, so as to avoid mutual interference between the signals.

[0044] The output interface of the first navigation filter is connected with a first preamplifier 61 through a first switch 71, and the first preamplifier 61 is used to amplify the screened satellite navigation signal. The first switch 71 includes two access pins and one output pin, the access pins are connected with the GPS band-pass filter 41 and the BDS band-pass filter 42 respectively, and the output pin is connected with the first preamplifier 61.

[0045] The output interface of the first communication filter is connected with a second preamplifier 62 through a second switch 72, and the second preamplifier 62 is used to amplify the screened mobile communication signal. The second switch includes three access pins and one output pin, the access pins are connected with the 2G band-pass filter 51, the 4G band-pass filter 52 and the 5G band-pass filter 53 respectively, and the output pin is connected with the second preamplifier 72. Among them, the second preamplifier only needs to cover the 2G, 4G and 5G frequency bands, without the need to customize special frequency bands, so as to reduce the cost.

[0046] After opening the door body of the shielding shell 3, the connection of the pins of the first switch 71 and the second switch 72 with the filters can be adjusted.

[0047] Through the above technical scheme, the corresponding filters can be connected according to the needs of the test sample, so as to adapt to the operation mode of multi-card multi-communication and composite navigation, and only a single signal can be output, and unnecessary filters can be disconnected, so as to further improve the signal-to-noise ratio of the signal.

[0048] The output interface of the first preamplifier 61 is connected with a second navigation filter, and the second navigation filter also includes the GPS band-pass filter 41 and the BDS band-pass filter 42 connected in parallel.

[0049] The output interface of the second preamplifier 62 is connected with a second communication filter, and the second communication filter also includes the 2G band-pass filter 51, the 4G band-pass filter 52 and the 5G band-pass filter 53 connected in parallel.

[0050] Through the above technical scheme, the first preamplifier 61 and the second preamplifier 62 will amplify noise, causing the signal to be not pure enough, so the second navigation filter and the second communication filter are arranged at the output interface of the first preamplifier 61 and the output interface of the second preamplifier 62 respectively, so as to further remove the interference signal and ensure that the signal output to the test sample has no interference.

[0051] The shielding shell 3 is provided with two output ends, the input port of the output end is located in the shielding shell 3, and the output port of the output end is located outside the shielding shell 3. The output end is divided into a first output end 33 and a second output end 34. The input port of the first output end 33 is connected with the output port of the second navigation filter, and the input port of the second output end 34 is connected with the output port of the second communication filter.

[0052] The output port of the output end can be directly connected with the to-be-tested sample 9 through a cable or connected with a transmitting antenna to send a signal to the to-be-tested sample 9.

[0053] In some feasible embodiments, the input end and the output end can be common physical interfaces such as an sma interface, a bnc interface, and an N interface.

[0054] Through the above technical solution, the device receives real satellite navigation signals and mobile communication signals from the outside world through an antenna, processes the signals through a navigation filter and a communication filter, amplifies the required signals through a signal amplifier to form a signal source for detecting the to-be-tested sample 9, and can test the to-be-tested sample 9 using a real signal source and reduce experimental costs compared with a traditional scheme using an expensive analog base station device.

[0055] The principle and implementation mode of the utility model are described by the specific embodiments, and the above embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and the application range will be changed according to the idea of the utility model, and the above description should not be understood as the limitation of the utility model.

Claims

1. A signal acquisition and screening device for providing a signal source for a sample to be tested in a shielded laboratory, characterized in that, The application relates to a shielding laboratory signal receiving device. The device comprises an antenna, which is arranged outside the shielding laboratory when in use and used for receiving signals; a shielding shell, which is arranged inside the shielding laboratory when in use, and is provided with an input end and an output end, wherein the antenna is connected with an input port of the input end; a navigation filter, which is arranged in the shielding shell and connected with an output port of the input end; a communication filter, which is arranged in the shielding shell and connected with the output port of the input end; a preamplifier, whose input ports are connected with output ports of the navigation filter and the communication filter respectively, and whose output port is connected with an input port of the output end; and the output end is used for outputting signals to a sample to be tested. The antenna has at least two, which are navigation signal antennas and communication signal antennas, the navigation signal antennas are used for receiving satellite navigation signals, and the communication signal antennas are used for receiving mobile communication signals. The shielding shell is provided with at least two input ends, which are a first input end and a second input end, the navigation signal antennas are connected with the first input end, the communication signal antennas are connected with the second input end, the navigation filter is connected with the first input end, and the communication filter is connected with the second input end. The navigation filter at least comprises a GPS band-pass filter and a BDS band-pass filter. The communication filter at least comprises a 2G band-pass filter, a 4G band-pass filter and a 5G band-pass filter. The preamplifier has at least two, which are a first preamplifier and a second preamplifier, the first preamplifier is connected with the first input end, and the second preamplifier is connected with the second input end.

2. The signal acquisition screening device of claim 1, wherein, The shielding shell is provided with at least two output ends, which are a first output end and a second output end, the first output end is connected with the first preamplifier, and the second output end is connected with the second preamplifier.

3. The signal acquisition screening device of claim 2, wherein, The device comprises a first switch and a second switch, the first switch comprises at least two access pins and an output pin, the access pins are connected with the GPS band-pass filter and the BDS band-pass filter respectively, and the output pin is connected with the first preamplifier; the second switch comprises at least three access pins and an output pin, the access pins are connected with the 2G band-pass filter, the 4G band-pass filter and the 5G band-pass filter respectively, and the output pin is connected with the second preamplifier.

4. The signal acquisition screening device of claim 3, wherein, The navigation filter is arranged between the first preamplifier and the first output end, and the communication filter is arranged between the second preamplifier and the second output end. The antenna and the input port of the input end are connected through a shielding wire.

5. The signal acquisition screening device of claim 4, wherein, At least one side of the shielding shell is openable.

6. The signal acquisition screening device of claim 5, wherein, ​ 7. The signal acquisition screening device of claim 6, wherein, ​ ​ 8. The signal acquisition screening device of claim 7, wherein, ​ 9. The signal acquisition screening device of claim 1, wherein, ​ 10. The signal acquisition screening device of claim 7, wherein, ​

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