Electromagnetic field visualization detection device

Abstract

The utility model belongs to the technical field of electromagnetic field detection, and particularly relates to an electromagnetic field visualization detection device which comprises an antenna matrix, an electromagnetic wave processing module and a display device. The display device is a wearable display device and is fixedly mounted with the antenna matrix and the electromagnetic wave processing module; the antenna matrix is used for receiving electromagnetic waves and forming input electric signals; the electromagnetic wave processing module is used for acquiring an input electric signal, processing and forming an electromagnetic field waveform; the display device is used for displaying electromagnetic field waveforms. The electromagnetic field visualization detection device can directly display the waveform of the electromagnetic field through the wearable display device, the antenna matrix and the display device are fixedly installed, electromagnetic field signals at the position where the electromagnetic field visualization detection device is located are directly detected, the detection and direction are flexibly adjusted, and the electromagnetic field visualization detection device is suitable for the complex environment where the electromagnetic field changes and is distributed.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic field detection, and particularly relates to an electromagnetic field visualization detection device. Background Art

[0002] The existing technologies for electromagnetic wave detection and positioning mainly rely on the principle of electromagnetic induction, and use various devices to capture, analyze and process electromagnetic wave signals, so as to determine the position and direction of an object. Electromagnetic wave detectors are used to measure and monitor the intensity and frequency of electromagnetic wave radiation. They are usually used to detect the electromagnetic radiation level in the environment, such as the electromagnetic radiation generated by household appliances, electronic devices or high-voltage lines.

[0003] In the prior art, an electromagnetic wave detector mainly consists of structures such as a detector, a signal amplification and processing circuit, a display and recording device, etc., and has a sensitive receiver and a signal processor, and can accurately measure various parameters of electromagnetic waves. This kind of electromagnetic wave detector has excellent performance, but due to its complex structure and large volume, it cannot be moved conveniently and is difficult to be flexibly applied to complex and changeable electromagnetic field environments. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defect that the electromagnetic wave detector in the prior art has a complex structure and a large volume, resulting in the inability to flexibly detect electromagnetic waves at each position, so as to provide an electromagnetic field visualization detection device.

[0005] An electromagnetic field visualization detection device includes an antenna matrix, an electromagnetic wave processing module and a display device;

[0006] The antenna matrix is used to receive electromagnetic waves and form an input electrical signal; the electromagnetic wave processing module is used to obtain the input electrical signal, process it and form an electromagnetic field waveform; the display device is used to display the electromagnetic field waveform; the display device is a wearable display device and is fixedly installed with the antenna matrix and the electromagnetic wave processing module;

[0007] The electromagnetic wave processing module includes a radio frequency input attenuator, an input filter, a mixer, an intermediate frequency gain unit, an intermediate frequency filter, a logarithmic amplifier, an envelope detector and a video filter connected in sequence; it also includes a local oscillator and a sweep generator, the sweep generator controls the output frequency of the local oscillator, and the output of the local oscillator is connected to the mixer.

[0008] Further, the radio frequency input attenuator is used to reduce the signal intensity of the input electrical signal.

[0009] Further, the input filter is one of a low-pass filter and a preselector, and is used to filter out high-frequency signals.

[0010] Further, the mixer is used for mixing to down-convert the input signal to form a mixed signal.

[0011] Further, the intermediate-frequency filter is used to filter the mixed signal to form an intermediate-frequency signal.

[0012] Further, the gain of the logarithmic amplifier decreases as the amplitude of the input signal increases.

[0013] Further, the envelope detector is used to convert the intermediate-frequency signal into a video signal.

[0014] Further, the video filter is used to reduce the low-level signals in the noise of the video signal.

[0015] Beneficial effects: The present utility model discloses an electromagnetic field visualization detection device, including an antenna matrix, an electromagnetic wave processing module, and a display device; the display device is a wearable display device, and is fixedly installed with the antenna matrix and the electromagnetic wave processing module; the antenna matrix is used to receive electromagnetic waves and form an input electrical signal; the electromagnetic wave processing module is used to obtain the input electrical signal, process it and form an electromagnetic field waveform; the display device is used to display the electromagnetic field waveform. The electromagnetic field visualization detection device of the present utility model can directly display the electromagnetic field waveform through the wearable display device, and fixedly installs the antenna matrix and the display device to directly detect the electromagnetic field signal at the location, flexibly adjust the detection and direction, and is applicable to complex environments with changing distributions of electromagnetic fields. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic block diagram of the overall structure of the present utility model. Detailed Embodiments

[0018] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following will give a detailed description of the specific embodiments of the present application with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0019] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0020] In the present application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0021] This embodiment discloses an electromagnetic field visualization detection device, including an antenna matrix, an electromagnetic wave processing module, and a display device; the antenna matrix is used to receive electromagnetic waves and form an input electrical signal; the electromagnetic wave processing module is used to obtain the input electrical signal, process it and form an electromagnetic field waveform; the display device is used to display the electromagnetic field waveform; the display device is a wearable display device and is fixedly installed with the antenna matrix and the electromagnetic wave processing module; the electromagnetic wave processing module includes a radio frequency input attenuator, an input filter, a mixer, an intermediate frequency gain unit, an intermediate frequency filter, a logarithmic amplifier, an envelope detector, and a video filter connected in sequence; it further includes a local oscillator (LO) and a sweep generator, the sweep generator controls the output frequency of the local oscillator, and the output of the local oscillator is connected to the mixer.

[0022] An electromagnetic field visualization detection device provided in this embodiment includes an antenna matrix, an electromagnetic wave processing module, and a display device; the display device is a wearable display device and is fixedly installed with the antenna matrix and the electromagnetic wave processing module; the antenna matrix is used to receive electromagnetic waves and form an input electrical signal; the electromagnetic wave processing module is used to obtain the input electrical signal, process it and form an electromagnetic field waveform; the display device is used to display the electromagnetic field waveform. The electromagnetic field visualization detection device of the present utility model can directly display the electromagnetic field waveform through the wearable display device, and fixedly installs the antenna matrix and the display device to directly detect the electromagnetic field signal at the location, flexibly adjust the detection and direction, and is applicable to complex environments with changing distributions of electromagnetic fields.

[0023] Specifically, the RF input attenuator is used to reduce the signal strength of the input electrical signal. The input filter is one of a low-pass filter and a preselector, and is used to filter out high-frequency signals. The mixer is used for mixing to down-convert the input signal to form a mixed-frequency signal. The intermediate-frequency filter is used to filter the mixed-frequency signal to form an intermediate-frequency signal. The gain of the logarithmic amplifier decreases as the amplitude of the input signal increases, thereby compressing the intermediate-frequency signal with a wide dynamic range for subsequent waveform processing. The envelope detector is used to convert the intermediate-frequency signal into a video signal. The video filter is used to reduce low-level signals in the noise of the video signal. In this embodiment, the local oscillator is a voltage-controlled oscillator, and the frequency sweeper controls the frequency of the local oscillator signal output by the local oscillator by changing the control voltage.

[0024] Working principle: The antenna matrix receives electromagnetic waves of different frequency bands to form an RF input signal; the RF input attenuator receives the RF input signal, reduces the strength of the RF input signal to form an attenuated signal, thereby ensuring that the electromagnetic wave processing module maintains good matching characteristics in a wide frequency range, reducing mismatch errors, protecting other processing circuits, and preventing component damage and excessive non-linear distortion; the input filter receives the attenuated signal, filters out high-frequency signals therein to form a filtered input signal, and prevents out-of-band signals from mixing with the local oscillator to generate redundant frequency responses in the intermediate frequency; the mixer receives the filtered input signal and the input of the local oscillator signal, and multiplies the two signals to form a mixed-frequency signal; the frequency sweeper outputs a continuously changing control voltage; the local oscillator is controlled by the control voltage and outputs a local oscillator signal with a continuously changing frequency, and the range of the output frequency is the frequency bandwidth; the intermediate-frequency gain unit is an operational amplifier that amplifies the mixed-frequency signal to form a mixed-frequency gain signal; the intermediate-frequency filter receives the mixed-frequency gain signal and suppresses other signals outside the bandwidth to form an intermediate-frequency signal; the logarithmic amplifier receives the intermediate-frequency signal, and its gain varies with the signal amplitude, thereby realizing compression of the intermediate-frequency signal to form a logarithmic signal; the envelope detector converts the logarithmic signal into a signal with a frequency range from zero to a certain higher frequency determined by circuit elements to form a video signal; the video filter filters out low-level signals of noise so that the signal is not submerged by noise to form a filtered video signal; the filtered video signal passes through a high-precision analog-to-digital converter, and outputs the collected level signal, which is displayed in the form of a waveform or a numerical value in the display device.

[0025] In this embodiment, the video filter is a low-pass filter.

[0026] In this embodiment, the envelope detector is composed of a diode, a load resistor, and a low-pass filter.

[0027] In this embodiment, the low-frequency signal is a signal less than 9 KHz, the intermediate-frequency signal is a signal of 20 MHz to 30 MHz, and the high-frequency signal is a signal greater than 100 MHz.

[0028] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0029] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An electromagnetic field visualization detection device, characterized in that, It includes an antenna matrix, an electromagnetic wave processing module, and a display device; The antenna matrix is used to receive electromagnetic waves and form an input electrical signal; the electromagnetic wave processing module is used to obtain the input electrical signal, process it and form an electromagnetic field waveform; the display device is used to display the electromagnetic field waveform; the display device is a wearable display device and is fixedly installed with the antenna matrix and the electromagnetic wave processing module; The electromagnetic wave processing module includes a radio frequency input attenuator, an input filter, a mixer, an intermediate frequency gain unit, an intermediate frequency filter, a logarithmic amplifier, an envelope detector, and a video filter that are connected in sequence; it also includes a local oscillator and a sweep oscillator, the sweep oscillator controls the output frequency of the local oscillator, and the output of the local oscillator is connected to the mixer.

2. The electromagnetic field visualization detection device according to claim 1, wherein The radio frequency input attenuator is used to reduce the signal strength of the input electrical signal.

3. The electromagnetic field visualization detection device according to claim 1, characterized in that, The input filter is one of a low-pass filter and a preselector, and is used to filter out high-frequency signals.

4. An electromagnetic field visualization detection device according to claim 1, characterized in that, The mixer is used for mixing to down-convert the input signal to form a mixed signal.

5. An electromagnetic field visualization detection device according to claim 1, characterized in that, The intermediate frequency filter is used to filter the mixed signal to form an intermediate frequency signal.

6. The electromagnetic field visualization detection device according to claim 1, characterized in that, The gain of the logarithmic amplifier decreases as the amplitude of the input signal increases.

7. The electromagnetic field visualization detection device according to claim 1, characterized in that The envelope detector is used to convert the intermediate frequency signal into a video signal.

8. The electromagnetic field visualization detection device according to claim 1, characterized in that, The video filter is used to reduce the low-level signals in the noise of the video signal.

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