High-precision wireless signal detecting and positioning device

Abstract

The invention discloses a high-precision wireless signal detection positioning device, which comprises a CPU processor, a signal attenuation module, a signal analysis module, an MCU controller and a built-in antenna module, and is characterized in that the built-in antenna module is used for receiving 2.4 GHz, 5.2 GHz and 5.8 GHz wireless signals; the signal attenuation module is used for carrying out amplitude attenuation on a signal received by the antenna and carrying out positioning; the signal analysis module is used for carrying out signal feature extraction and frequency band distinguishing on the received wireless signals; the CPU processor is used for carrying out amplitude determination and signal feature classification output on the analyzed signal, and adjusting an output value of the MCU controller according to a signal amplitude determination result; the MCU controller is used for controlling the signal attenuation degree of the signal attenuation module. As independent equipment, the wireless signal detection device can be used for detecting wireless signals in any environment and accurately positioning wireless signal equipment.

Description

Technical Field

[0001] This invention relates to the field of electronic information technology, and in particular to a high-precision wireless signal detection and positioning device. Background Technology

[0002] With the rapid development of technology, wireless technology has permeated all aspects of people's lives and work, from everyday mobile device communication to equipment interconnection in industrial production, and environmental control within smart buildings; wireless signals play an indispensable role in all of these. Against this backdrop, the requirements for the accuracy of wireless signal detection and positioning are becoming increasingly stringent.

[0003] Especially in specific confidential locations, any form of wireless signal transmission is strictly prohibited. It is necessary not only to use special devices to detect the presence of wireless transmission equipment, but also to accurately locate the equipment that is transmitting wireless signals in order to clean it up in a timely manner and eliminate the security risks caused by wireless signal transmission equipment. Summary of the Invention

[0004] This invention provides a high-precision wireless signal detection and positioning device. As a standalone device, it can be used to detect wireless signals and accurately locate wireless signal devices in any environment, achieving a positioning accuracy of 0.1m. See the description below for details:

[0005] A high-precision wireless signal detection and positioning device, the device comprising: a CPU processor, a signal attenuation module, a signal analysis module, an MCU controller, and a built-in antenna module.

[0006] The built-in antenna module is used to receive wireless signals at 2.4GHz, 5.2GHz, and 5.8GHz; the signal attenuation module is used to attenuate the amplitude of the signal received by the antenna for positioning; the signal analysis module is used to extract signal features and distinguish frequency bands from the received wireless signals; the CPU processor is used to determine the amplitude of the analyzed signal, classify and output the signal features, and adjust the output value of the MCU controller according to the result of the signal amplitude determination; the MCU controller is used to control the degree of signal attenuation by the signal attenuation module.

[0007] One approach combines two methods: improving the antenna's own receiving sensitivity and the number and layout of built-in antennas.

[0008] The antenna measures 37mm x 9mm, is a 4th generation IPEX standard, has a gain of 4dBI, and operates in the frequency range of 2400MHz-2500MHz and 4900MHz-5900MHz.

[0009] The device has four antennas inside. The first and second antennas are placed parallel to each other in the middle of the top cover, and the third and fourth antennas are placed parallel to each other on both sides of the housing. The first and second antennas are arranged at a 90° angle to the third and fourth antennas.

[0010] Among them, the amplitude attenuation of the wireless signal received by the real-time adjustment device;

[0011] The built-in antenna module first transmits the received wireless signal to the signal attenuation module. After amplitude attenuation by the signal attenuation module, the signal is sent to the signal analysis module. The analyzed signal is then sent to the CPU processor. The CPU processor performs amplitude determination and location calculation on the received analyzed signal. If the signal amplitude is too large, the CPU processor compares the received signal amplitude with a preset value, calculates the amplitude value that the signal needs to be attenuated again, and sends the attenuation value to the MCU controller. The MCU controller adjusts the truth table of the signal attenuation module to adjust the signal attenuation amplitude.

[0012] The CPU processor, after receiving and parsing the signal, uses different algorithms to fit and locate different types of wireless signals. For Wi-Fi 2.4GHz signals, it uses... For 5GHz Wi-Fi signals, location fitting is performed using... For mobile terminal signals, location fitting is performed using... The positioning fitting is performed, where x is the amplitude of the signal currently received by the device, and y is the distance between the device and the transmitter of the signal to be detected.

[0013] The beneficial effects of the technical solution provided by this invention are:

[0014] 1. This device, as an independent operating device, can accurately detect and locate Wi-Fi wireless signals and terminal wireless signals;

[0015] 2. Through customized antenna design and built-in antenna layout design, this device achieves an overall receivable input level of less than -90dBm and a detectable signal range covering a horizontal distance of 50m.

[0016] 3. By employing a signal attenuator and combining it with different fitting positioning algorithms, this device can significantly improve the signal detection range and positioning accuracy, raising the positioning accuracy to 0.1m and achieving precise positioning. Attached Figure Description

[0017] Figure 1 This is a block diagram of the overall design of a high-precision wireless signal detection and positioning device.

[0018] Figure 2A flowchart illustrating the signal detection and positioning process of a high-precision wireless signal detection and positioning device;

[0019] Figure 3 A structural diagram showing the built-in customized antenna;

[0020] Figure 4 This is the antenna layout diagram of the device;

[0021] Figure 5 This is a schematic diagram illustrating the principle of signal amplitude attenuation.

[0022] Figure 6 Fitted curves for different types of signals. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below.

[0024] A high-precision wireless signal detection and positioning device, the functional block diagram of which is shown below. Figure 1 As shown, the device integrates a CPU processor A, a signal attenuation module B, a signal analysis module C, an MCU controller D, and a built-in antenna module E. The built-in antenna module E receives wireless signals at 2.4GHz, 5.2GHz, and 5.8GHz. The signal attenuation module B attenuates the amplitude of the received signals for accurate positioning. The signal analysis module C extracts signal features and distinguishes frequency bands from the received wireless signals. The CPU processor A determines the amplitude of the analyzed signals, classifies and outputs signal features, and adjusts the output value of the MCU controller D based on the amplitude determination results. The MCU controller D controls the degree of signal attenuation by the signal attenuation module B.

[0025] After the device is turned on, the built-in antenna module E receives wireless signals from the environment in real time and sends the received wireless signals to the signal attenuation module B for amplitude attenuation. The attenuated signal is then sent to the signal analysis module C for signal analysis, and the analyzed signal is sent to the CPU processor A in real time. The CPU processor A first determines the signal amplitude of the received signal. When the signal amplitude exceeds a predetermined value, the CPU processor A calculates the attenuation level based on the current signal amplitude and sets the output value of the MCU controller D according to the calculated attenuation level. The MCU controller D controls the attenuation amplitude of the signal attenuation module B according to the received set value. The attenuated signal is then sent to the CPU processor A again after signal analysis for signal strength determination and location information calculation, thereby achieving accurate location of the device emitting the wireless signal. The device's workflow is as follows: Figure 2 As shown.

[0026] Because different wireless signal transmitting devices have varying transmission powers, and these power differences can be significant, it is necessary to improve the receiving sensitivity of wireless signal detection devices to achieve accurate detection of wireless signals of different power levels. This invention improves the overall detection accuracy of the device by combining two methods: enhancing the receiving sensitivity of the antenna itself and adjusting the number and arrangement of the built-in antennas.

[0027] The device's built-in antenna module employs a customized welded FPC antenna. Through multiple actual measurements of antenna receiving sensitivity and continuous optimization of the antenna's shape and design dimensions, the impact of receiving sensitivity variations between the 2.4GHz, 5.2GHz, and 5.8GHz bands was balanced. Ultimately, optimal antenna receiving sensitivity was achieved in all three bands. The final antenna version measures 37mm x 9mm, conforms to the 4th generation IPEX standard, has a gain of 4dB1, and operates in the frequency ranges of 2400MHz-2500MHz and 4900MHz-5900MHz. The actual shape of the built-in antenna is shown below. Figure 3 As shown.

[0028] To improve the overall accuracy of the device in detecting and locating wireless signals, after adjusting the receiving sensitivity of the built-in antennas, it is necessary to design the number and layout of the built-in antennas based on the device's structure and overall dimensions. This was primarily verified through actual testing. Multiple measurements revealed that an excessive number of antennas or an unreasonable layout would result in overlapping antenna radiation ranges, causing a trade-off in the signal reception capabilities of different frequency bands. This would not only fail to improve the overall receiving sensitivity of the device but would actually decrease it. By adjusting the antenna placement and corresponding test results, the optimal distance and angle between the antennas were determined. Based on the actual dimensions of the device, four antennas were ultimately installed inside. Antennas 1 and 2 were placed parallel to each other in the center of the device's top cover, while antennas 3 and 4 were placed parallel to each other on either side of the device's casing. Antennas 1 and 2 were arranged at a 90° angle to antennas 3 and 4. Figure 4 As shown. Through optimized layout of the built-in antenna, the overall receivable input level of the device is ultimately reduced to less than -90dBm.

[0029] The device first improves its wireless signal reception sensitivity by incorporating a custom-designed antenna and adjusting the number and layout of the antennas. This ensures that the device can detect wireless signal transmission devices with low transmission power at long distances. Through the layout design of the built-in antennas, the device can ultimately receive wireless signals within a horizontal range of 50m.

[0030] The improved receiver sensitivity of the device means that signals from some high-power wireless transmitters, after being received by the antenna and transmitted to CPU processor A, experience increased amplitude, making accurate positioning impossible. To improve the positioning accuracy of high-power wireless signals, the device can receive signals over a wide range and long distances. This is achieved by adjusting the amplitude attenuation of the received wireless signals in real time. Figure 5 The diagram shows the design principle of signal amplitude attenuation. The wireless signal received by the antenna is first transmitted to the RF attenuator. After amplitude attenuation by the RF attenuator, the signal is sent to the signal analysis module. The analyzed signal is sent to the CPU processor A. The CPU processor A performs amplitude determination and location calculation on the received analyzed signal. If the signal amplitude is too large, the signal source cannot be accurately located. The CPU processor A compares the received signal amplitude with a preset value, calculates the amplitude value that the signal needs to be attenuated again, and sends the attenuation value to the MCU controller D. The MCU controller D adjusts the truth table of the RF attenuator to adjust the signal attenuation amplitude.

[0031] The RF attenuator U1 uses an HMC624ALP4E controller. This HMC624ALP4E controller integrates a 6-bit attenuator chip, providing an attenuation range of 0~31.5 dB with a step size of 0.5 dB. Internally, the HMC624ALP4E controller supports both serial and parallel control modes for the 6-bit attenuator. Figure 5 As shown, the 6-bit attenuator control pins D0, D1, D2, D3, D4, and D5 of the HMC624ALP4E controller are connected to the P0.1, P0.2, P0.3, P0.4, P0.5, and P0.6 pins of the MCU controller D, respectively. The MCU controller D sets the signal attenuation amplitude by controlling the high and low levels of the HMC624ALP4E attenuator pins D0, D1, D2, D3, D4, and D5.

[0032] To maximize the accuracy of signal detection and positioning, CPU processor A, after receiving and analyzing the signal, uses different algorithms for fitting and positioning different types of wireless signals. For Wi-Fi 2.4GHz wireless signals, it uses... For 5GHz Wi-Fi signals, location fitting is performed using... For mobile terminal signals, location fitting is performed using... Perform localization fitting, such as Figure 6 The figure shows the fitting curves for different types of wireless signals. Actual testing verified that the fitted positioning data can improve positioning accuracy to 0.1m.

[0033] Unless otherwise specified, the model numbers of the various devices in this embodiment of the invention are not limited, and any device that can perform the above functions is acceptable.

[0034] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision wireless signal detection and positioning device, characterized in that, The device includes: a CPU processor, a signal attenuation module, a signal analysis module, an MCU controller, and a built-in antenna module. The built-in antenna module is used to receive wireless signals at 2.4GHz, 5.2GHz, and 5.8GHz; the signal attenuation module is used to attenuate the amplitude of the signal received by the antenna for positioning; the signal analysis module is used to extract signal features and distinguish frequency bands from the received wireless signals; the CPU processor is used to determine the amplitude of the analyzed signal, classify and output the signal features, and adjust the output value of the MCU controller according to the result of the signal amplitude determination; the MCU controller is used to control the degree of signal attenuation by the signal attenuation module.

2. The high-precision wireless signal detection and positioning device according to claim 1, characterized in that, The approach combines two methods: improving the antenna's own receiving sensitivity and the number and layout of built-in antennas.

3. The high-precision wireless signal detection and positioning device according to claim 1, characterized in that, The antenna measures 37mm x 9mm, is a 4th generation IPEX standard, has a gain of 4dB1, and operates in the frequency range of 2400MHz-2500MHz and 4900MHz-5900MHz.

4. The high-precision wireless signal detection and positioning device according to claim 1, characterized in that, The device has four antennas inside. The first and second antennas are placed parallel to each other in the middle of the top cover, and the third and fourth antennas are placed parallel to each other on both sides of the housing. The first and second antennas are arranged at a 90° angle to the third and fourth antennas.

5. A high-precision wireless signal detection and positioning device according to claim 1, characterized in that, The amplitude attenuation of the wireless signal received by the real-time adjustment device; The built-in antenna module first transmits the received wireless signal to the signal attenuation module. After amplitude attenuation by the signal attenuation module, the signal is sent to the signal analysis module. The analyzed signal is then sent to the CPU processor. The CPU processor performs amplitude determination and location calculation on the received analyzed signal. If the signal amplitude is too large, the CPU processor compares the received signal amplitude with a preset value, calculates the amplitude value that the signal needs to be attenuated again, and sends the attenuation value to the MCU controller. The MCU controller adjusts the truth table of the signal attenuation module to adjust the signal attenuation amplitude.

6. The high-precision wireless signal detection and positioning device according to claim 1, characterized in that, After receiving and analyzing the signal, the CPU processor uses different algorithms to fit and locate different types of wireless signals. For Wi-Fi 2.4GHz signals, it uses... For 5GHz Wi-Fi signals, location fitting is performed using... For mobile terminal signals, location fitting is performed using... The positioning fitting is performed, where x is the amplitude of the signal currently received by the device, and y is the distance between the device and the transmitter of the signal to be detected.

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