Radio receiving device and method for testing electromagnetic compatibility
By introducing a signal monitoring and splitting module into the radio receiving equipment, combined with a calibration and quick-disassembly structure, the problem of attenuator damage caused by excessive signal power is solved, achieving higher measurement accuracy and easier equipment maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-08
- Publication Date
- 2026-04-07
AI Technical Summary
In existing radio receiving equipment, when the signal power exceeds the maximum rated power of the attenuator, heat cannot be dissipated in time, which may lead to changes in resistance or permanent damage, affecting measurement accuracy and normal operation of the equipment.
A directional coupler is set in the signal monitoring module to shunt the signal when the signal strength exceeds the threshold, and the excess energy is consumed by the signal processing module. Combined with the calibration module, the total insertion loss value is accurately measured to improve the measurement accuracy. A quick-disassembly structure is set to facilitate the replacement of the low-noise amplification module.
It effectively prevents attenuator damage, improves the accuracy of measurement results, and enhances equipment maintenance efficiency through a quick-disassembly structure.
Smart Images
Figure CN121814224A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of radio receiving, in particular to a radio receiving device and method for testing electromagnetic compatibility. BACKGROUND
[0002] The core use of the radio receiving device used in electromagnetic compatibility testing is to detect and evaluate whether the electromagnetic interference generated by electronic devices in actual scene use conforms to the standard. It determines the type, intensity and frequency distribution of the electromagnetic interference signal in a specific frequency range by receiving and analyzing it, helps to locate the interference source, to ensure that the detected device can work normally in a complex electromagnetic scene and is not affected by other devices.
[0003] In the radio receiving device used in electromagnetic compatibility testing, there is a group of signal receiving modules, which contain low-noise amplifiers inside. The low-noise amplifier is designed to handle micro-volt (uV) level weak signals, and the low-noise amplifier is provided with an attenuator inside. The core of the attenuator is a resistor network. When a high-power signal passes through, the electrical energy is converted into heat energy. If the power of the input signal exceeds the maximum rated power that the attenuator can withstand, the heat generated cannot be dissipated in time, causing the temperature to rise sharply. Lightly, it causes the resistance value to change, making the attenuation value inaccurate, and the measurement result is inaccurate. Heavy, it directly burns the resistor element or the circuit board, causing permanent damage to the attenuator, and the entire receiver will not work normally. SUMMARY
[0004] In order to solve the above problems, the present application provides a radio receiving device for testing electromagnetic compatibility, which can avoid the power of the input signal exceeding the maximum rated power that the attenuator can withstand, and the heat generated cannot be dissipated in time.
[0005] In view of the problems in the prior art, the present application provides a radio receiving device for testing electromagnetic compatibility, which comprises a device main body, a signal monitoring module arranged inside a low-noise amplification module, a signal monitoring module for detecting the strength of the signal collected by the signal collection module, a directional coupler arranged inside the shunt module, and a signal monitoring module connected between the shunt module and the signal monitoring module. When the signal monitoring module detects that the signal strength exceeds the maximum strength that the attenuator can withstand, the directional coupler will shunt the signal. The signal processing module is arranged inside the shunt module, and the signal processing module is used to process the shunted signal flow. The attenuator module and the shunt module are connected, and the attenuator module and the low-noise amplification module are connected. The attenuator module is provided with an attenuator for reducing the signal strength and providing protection for the signal collection module.
[0006] On the other hand, the present application also provides a radio receiving method for testing electromagnetic compatibility of a radio receiving device, comprising the following steps: S1: first complete the connection between the device body and the detection device, then start the device, the signal receiving module starts to receive the signal, and after the signal is received, it will first enter the signal monitoring module in the low noise amplification module, and the signal monitoring module starts to detect the strength of the signal; S2: when the signal monitoring module detects that the signal strength exceeds the maximum strength that the attenuator can withstand, the signal monitoring module will deliver the signal to the directional coupler in the shunt module, and the directional coupler will shunt the signal; S3: the signal stream separated by the directional coupler will enter the inside of the signal processing module, and a matching load will be directly connected to the inside of the signal processing module to consume part of the signal energy; S4: the main signal stream will enter the attenuator in the attenuation module for attenuation, and then enter the filter module for detection of accuracy and legality, and then enter the detection module for detection of peak value; S5: the main signal data will enter the data calibration inside the calibration module, and finally enter the storage inside the digital processing display module.
[0007] The beneficial effects of the present application are: 1. The signal monitoring module is provided in the present application, and the signal will be detected first before entering the attenuation module. Once the signal strength exceeds the threshold set in advance, the directional coupler in the shunt module will separate it, thereby reducing the strength of the signal, and then entering the inside of the attenuation module, thereby preventing the attenuator from being damaged.
[0008] 2. The calibration module is provided in the present application. Through the calibration process, the total insertion loss value in the signal path is accurately measured and stored in the storage module. When actual measurement is performed, the data will first enter the inside of the data processing module, the actual loss value will be input into the data processing module by the storage module, and the loss value and the measured data are added, thereby obtaining more accurate measurement value, so as to improve the accuracy of the measurement result.
[0009] 3. In the present application, the nut of the screen plate is removed, the pull ring is pulled, at this time the pull ring drives the slider to slide out, and the mounting plate also moves, thereby taking out the low noise amplification module on the mounting plate, thereby completing the rapid disassembly, and when it is damaged, the replacement efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0010] The present application will be further described below in combination with the drawings and examples.
[0011] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 2 It is a schematic diagram of the connection structure of the overall back part of the present application; Figure 3It is the connection structure schematic view of low noise amplifier module, sieve plate and sleeve rod and other parts in the application; Figure 4 It is the connection structure distribution view of internal parts of the slider in the application; Figure 5 It is the sectional view of the slider in the application; Figure 6 It is the flow chart of the method in the application; Figure 7 It is the running chart of the shunt module in the application; Figure 8 It is the running chart of the calibration module in the application.
[0012] In the figure: 1, equipment main body; 2, installation assembly; 210, sieve plate; 211, pull ring; 212, sleeve; 213, sliding rail; 214, slider; 215, mounting plate; 216, cooling fan; 217, moisture filter layer; 218, first partition; 219, second partition; 220, copper block. DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.
[0014] Embodiment one: a radio receiving device for testing electromagnetic compatibility, as shown in Figure 1 , Figure 4 , Figure 5 and Figure 6 , includes an equipment main body, the signal monitoring module is arranged in the interior of the low noise amplifier module, the signal monitoring module is used to detect the strength of the signal received by the signal receiving module, the interior of the shunt module is provided with a directional coupler, and the shunt module and the signal monitoring module are connected, when the signal monitoring module monitors that the signal strength exceeds the maximum strength that the attenuator can bear, the directional coupler will shunt the signal, the signal processing module is arranged in the interior of the shunt module, the signal processing module is used to process the shunted signal flow, the attenuator module and the shunt module are connected, the attenuator module and the low noise amplifier module are connected, the attenuator module is provided with an attenuator, which is used to reduce the signal strength and provide protection for the signal receiving module; The interior of the filter module includes a preselector and a filter, the preselector measures data more accurately in a strong interference environment, and the filter can filter and screen data, the filter module and the detection module are connected, the detection module is provided with a plurality of detectors, and in an interference signal, the detector can make the ENC normally operate.
[0015] Preferably, the detection module is connected to the calibration module, the calibration module comprises a storage module and a data processing module inside, the calibration module can accurately measure the total insertion loss value in the signal path through the calibration process and store it in the storage module, the data processing module is connected to the storage module, the total insertion loss value in the storage module is transmitted to the inside of the data processing module, and the receiver or test software installed in the data processing module can automatically add the loss value to the reading to obtain the true strength of the measured signal.
[0016] Preferably, the calibration module is connected to the digital processing and display module, and the data processing module transmits the data after adding the loss value to the inside of the digital processing and display module, so that the staff can watch.
[0017] The application also provides a radio receiving method for testing electromagnetic compatibility of a radio receiving device, which comprises the following steps: S1: first, the connection between the device main body and the detection device is completed, then the device is started, the signal receiving module starts to receive signals, and the signals are first transmitted to the signal monitoring module in the low-noise amplification module after being received, and the signal monitoring module starts to detect the strength of the signals; S2: when the signal monitoring module detects that the signal strength exceeds the maximum strength that can be borne by the attenuator, the signal monitoring module transmits the signals to the directional coupler in the shunt module, and the directional coupler shunts the signals; S3: the signal stream separated by the directional coupler is transmitted to the inside of the signal processing module, and a matching load is directly connected to the inside of the signal processing module to consume the signal energy; S4: the main signal stream is transmitted to the attenuator in the attenuation module for attenuation, then is transmitted to the filter module for detection of accuracy and legality, and then is transmitted to the detection module for detection of the peak value; S5: the main signal data is transmitted to the inside of the calibration module for data calibration, and finally is transmitted to the inside of the digital processing and display module for storage.
[0018] Preferably, the data calibration method comprises the following steps: S1: the calibration module accurately measures the total insertion loss value and the total insertion loss in the signal path through the calibration process, and stores them in the storage module; S2: the main signal data is transmitted to the data processing module in the calibration module, and the total insertion loss value calculated in the storage module is also transmitted to the data processing module, the data processing module adds the total insertion loss value to the main signal data to form an accurate value, so as to ensure the accuracy of the detection result.
[0019] As Figure 1 , Figure 4 , Figure 5and Figure 6 As shown, first, the connection between the device body and the detection device is completed, then the device is started, the signal receiving module starts to receive signals, after the signals are received, they first enter the signal monitoring module in the low-noise amplification module, the signal monitoring module starts to detect the strength of the signals, when the signal monitoring module detects that the signal strength exceeds the maximum strength that the attenuator can withstand, the signal monitoring module will deliver the signals to the directional coupler in the shunt module, the directional coupler will shunt the signals, the signal stream separated by the directional coupler will enter the inside of the signal processing module, the inside of the signal processing module will directly connect a matching load to consume this part of signal energy, the main signal stream will enter the attenuator in the attenuation module for attenuation, then enter the filter module to detect accuracy and legitimacy, then enter the detection module to detect the peak value, the main signal data will enter the inside of the calibration module for data calibration, and finally enter the inside of the digital processing and display module for storage. If the signal monitoring module detects that the signal strength is within the range that the attenuator can withstand, it will directly enter the attenuation module, then enter the filter module, then enter the detection module to detect the peak value, the main signal data will enter the inside of the calibration module for data calibration, and finally enter the inside of the digital processing and display module for storage.
[0020] The calibration module accurately measures the total insertion loss value and the total insertion loss in the signal path through the calibration process, and stores them in the storage module; the main signal data will enter the data processing module in the calibration module, and the total insertion loss value calculated in the storage module will also enter the data processing module, the data processing module will add the total insertion loss value to the main signal data to form an accurate value, so as to ensure the accuracy of the detection result.
[0021] The calculation formula is: total insertion loss (dB) = loss of component 1 (dB) + loss of component 2 (dB) + … + loss of component n (dB).
[0022] Example two: as Figure 1 , Figure 2 , and Figure 3As shown, the device body 1 is provided with a mounting assembly 2, which comprises a sieve plate 210, a pull ring 211, a sleeve 212, a sliding rail 213, a sliding block 214, a mounting plate 215, a heat dissipation fan 216, a moisture filter layer 217, a first partition plate 218, a second partition plate 219, and a copper block 220. The sieve plate 210 is fixedly installed on the back side of the device body 1 by a nut, and a group of pull rings 211 are fixedly installed on the sieve plate 210. The sleeve 212 is fixedly installed inside the device body 1 and located on both sides of the low-noise amplification module. The sliding shaft of the sleeve 212 is fixedly connected to the side wall of the sieve plate 210. The side wall of the sieve plate 210 is fixedly connected to one end of the sliding block 214. The sliding block 214 is slidingly connected inside the sliding rail 213, which is fixedly installed inside the device body 1. The side wall of the sieve plate 210 is fixedly connected to one side of the mounting plate 215, and the mounting plate 215 is fixedly connected to the low-noise amplification module.
[0023] As shown in Figure 4 and Figure 5 , a group of first partition plates 218 and second partition plates 219 are fixedly installed inside the sliding block 214, and the space inside the sliding block 214 is divided into three layers by the first partition plates 218 and the second partition plates 219. A plurality of heat dissipation fans 216 are fixedly installed in the middle layer of the bottom of the sliding block 214. A group of moisture filter layers 217 are fixedly installed in the middle layer of the bottom of the sliding block 214. One side of the first partition plate 218 is aligned with one side of the sliding block 214, and one side of the second partition plate 219 is aligned with the other side of the sliding block 214. A plurality of copper blocks 220 are fixedly installed on one side of the sliding block 214. The sliding block 214 is made of copper.
[0024] Example two is further improved on the basis of example one; As shown in Figure 1 , Figure 2 , and Figure 3 , when the low-noise amplification module needs to be disassembled, replaced, or repaired, first, open the top cover of the device body 1, disconnect the connection between the low-noise amplification module and other components, remove the nuts on the sieve plate 210, pull the pull ring 211, which will move the sieve plate 210 and the mounting plate 215 under stress, and the sliding block 214 will also be forced to slide out of the device. The mounting plate 215 will move the low-noise amplification module together to the outside of the device. The staff removes the fixing nuts between the low-noise amplification module and the mounting plate 215, and the low-noise amplification module can be disassembled.
[0025] As shown in Figure 4 and Figure 5As shown, when the temperature inside the device body 1 is too high and the original heat sink cannot quickly cool down, the heat dissipation fan 216 will start, and after the heat dissipation fan 216 starts, it will suck the external air into the inside of the sliding block 214, and then filter the moisture in the air through the moisture filter layer 217, so as to enter the interlayer formed by the first partition plate 218 and the second partition plate 219, and then enter the upper interlayer. The cold air filtered of moisture will enter the inside of the device through the air holes on the copper block 220, and has a cooling effect. After the cold air contacts the copper block 220, the temperature of the copper block 220 will be reduced, thereby improving the heat absorption efficiency of the copper block 220, so as to achieve the effect of rapid cooling.
[0026] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.
Claims
1. A radio receiving device for testing electromagnetic compatibility, characterized in that, include: Equipment body (1); A signal monitoring module is located inside the low-noise amplifier module and is used to detect the strength of the signal received by the signal receiving module. The current splitter module has a directional coupler inside and is connected to the signal monitoring module. When the signal monitoring module detects that the signal strength exceeds the maximum strength that the attenuator can withstand, the directional coupler will split the signal. A signal processing module is located inside the splitter module, and the signal processing module is used to process the split signal stream; An attenuation module is connected to a splitter module and a low-noise amplifier module. The attenuation module contains an attenuator to reduce signal strength and provide protection for the signal receiving module.
2. The radio receiving device according to claim 1, characterized in that: The main body (1) of the equipment is equipped with an installation assembly (2). The interior of the installation assembly (2) includes a screen plate (210), a pull ring (211), a sleeve (212), a slide rail (213), a slider (214), an installation plate (215), a cooling fan (216), a filter layer (217), a first partition (218), a second partition (219), and a copper block (220). The screen plate (210) is fixedly installed on the back side of the main body (1) by nuts. A set of pull rings (211) is fixedly installed on the screen plate (210).
3. The radio receiving device according to claim 2, characterized in that: The sleeve (212) is fixedly installed inside the main body of the equipment (1) and located on both sides of the low noise amplification module. The sliding shaft of the sleeve (212) is fixedly connected to the side wall of the screen plate (210). The side wall of the screen plate (210) is fixedly connected to one end of the slider (214). The slider (214) is slidably connected inside the slide rail (213). The slide rail (213) is fixedly installed inside the main body of the equipment (1). The side wall of the screen plate (210) is fixedly connected to one side of the mounting plate (215). The mounting plate (215) is fixedly connected to the low noise amplification module.
4. The radio receiving device according to claim 2, characterized in that: The slider (214) has a set of first partition (218) and second partition (219) fixedly installed inside, and the space inside the slider (214) is divided into three layers by the first partition (218) and second partition (219). Multiple sets of heat dissipation fans (216) are fixedly installed in the bottom interlayer of the slider (214), and a set of moisture filter layer (217) is fixedly installed in the bottom interlayer of the slider (214).
5. The radio receiving device according to claim 4, characterized in that: One side of the first partition (218) is aligned with one side of the slider (214), while one side of the second partition (219) is aligned with the other side of the slider (214), and multiple sets of copper blocks (220) are fixedly installed on one side of the slider (214), which is a copper product.
6. The radio receiving device according to claim 1, characterized in that: The signal acquisition module includes a low-noise amplification module, a signal monitoring module, and a splitter module. The signal acquisition module and the filtering module are connected to each other.
7. The radio receiving device according to claim 6, characterized in that: The calibration module includes a storage module and a data processing module. The calibration module accurately measures the total insertion loss value in the signal path through the calibration process and stores it in the storage module.
8. The radio receiving device according to claim 7, characterized in that: The total insertion loss value in the storage module is sent to the inside of the data processing module. The receiver or test software installed inside the data processing module can automatically add the loss value to the reading to obtain the true strength of the measured signal. The data processing module sends the data, after adding the loss value, to the digital processing and display module.
9. A radio receiving method based on a radio receiving device for testing electromagnetic compatibility according to any one of claims 1-8, characterized in that: Procedure for testing electromagnetic compatibility of radio receivers: S1: First, complete the connection between the main body of the equipment and the detection equipment, then start the equipment. The signal acquisition module starts to acquire the signal. After the signal is acquired, it will first enter the signal monitoring module in the low noise amplification module. The signal monitoring module starts to detect the signal strength. S2: When the signal monitoring module detects that the signal strength exceeds the maximum strength that the attenuator can withstand, the signal monitoring module will send the signal to the directional coupler in the splitter module, and the directional coupler will split the signal. S3: The signal flow separated by the directional coupler will enter the signal processing module, and a matching load will be directly connected inside the signal processing module to consume this part of the signal energy; S4: The main signal stream will enter the attenuator in the attenuation module for attenuation, then enter the filtering module to detect accuracy and legality, and then enter the detection module to detect peak value. S5: The main signal data will enter the calibration module for data calibration, and finally enter the digital processing and display module for storage.
10. The radio receiving method according to claim 9, characterized in that: The data calibration method process is as follows: S1: The calibration module accurately measures the total insertion loss value in the signal path through the calibration process and stores it in the storage module; S2: The main signal data will enter the data processing module within the calibration module, and the total insertion loss value calculated in the storage module will also enter the data processing module. The data processing module will add the total insertion loss value to the main signal data to form an accurate value, so as to ensure the accuracy of the detection results.