CN111404624A - Wireless Signal Strength Detection Device - Google Patents

Abstract

The invention relates to the technical field of wireless signal detection. The invention provides a wireless signal strength detection device, which at least comprises an antenna signal processing module and a signal strength indicating module, wherein the wireless signal strength detection device executes a two-stage filtering process, firstly, a low-pass filter on the antenna signal processing module is used for filtering out high-frequency signals which are not used by a digital television, and then, a high-pass filter on the signal strength indicating module is used for filtering out low-frequency signals which are not used by the digital television, so that signals in a common range of the common digital television can be screened out, and the wireless signal strength detection with low signal loss and low noise index is realized at low cost. The signal detection precision of the wireless signal strength detection device is high. The wireless signal strength detection device can be used for well determining the better placing position of the digital antenna.

Description

Wireless Signal Strength Detection Device

technical field

The invention relates to the technical field of wireless signal detection, in particular to a wireless signal strength detection device.

Background technique

As the quality of wireless digital TV terminals is getting better and better, and users can watch TV programs for free through wireless digital TV terminals, consumers have higher and higher requirements for the quality of signals received by digital antennas. However, the quality of the received signal is not completely determined by the performance of the digital antenna, and the placement of the digital antenna is a very important factor. Therefore, in order to obtain the best placement of the digital antenna, there are two methods that consumers can use, which are described as follows:

First, find the antenna placement position with the strongest TV signal strength through the picture quality presented by the TV screen. In this method, the user must constantly adjust the antenna position, and then find the position with the strongest TV signal from the TV picture quality. However, the disadvantage of this method is that at least two people must cooperate to complete the installation of the antenna, and sometimes the placement of the antenna is far away from the placement of the TV, so it is very inconvenient to use, and it is very difficult for consumers to be alone Complete the antenna installation independently. Furthermore, good signal strength of one TV channel does not mean that all TV channels have good signals, so it is very difficult for inexperienced users to find the most ideal signal position.

Second, a signal strength detector is connected to the antenna, and the user only needs to find the best signal position according to the signal strength displayed on the signal strength detector. Although installing a signal strength detector on the antenna allows the user to directly determine whether the signal strength of the position where the antenna is placed is the best, and the user does not need to judge the quality of the TV signal through the TV screen. However, in fact, there are many wireless signals in the environment, and the strength of each signal is different. If the signal detection range of the signal strength detector is not accurate, the signal strength detector will be very easy. Being misled by strong signals in a specific TV signal range or strong signals in other non-TV signal ranges is a problem with signal strength detectors currently on the market.

In addition, the existing signal strength detectors such as US Pat. Nos. 9,485,041 and 9,503,205, the signal strength detectors filter the antenna signal through a Band Pass Filter (BPF) and output a selected frequency The signal of the selected frequency range (that is, the frequency band of general digital TV), and then analyze the signal strength of the selected frequency range. Although the BPF can directly filter out signals in a specific frequency range, its disadvantage is that the BPF will cause higher signal loss to the filtered signal, resulting in an increase in the Noise Factor of the output signal, which in turn affects the output. The quality of the TV signal, even the use of low noise figure amplifiers, cannot solve this shortcoming. Furthermore, the cost of the BPF is very high, which is not economical, and the signal strength detector detects the signal in the entire selected frequency range, so the detection result may be misled by a specific strong signal. The problem.

Therefore, the inventor of the present case has accumulated many years of experience in R&D and manufacturing of related electronic equipment such as automotive electronic equipment and wireless signal receiving systems, and has specially studied the problems existing in the wireless signal strength detection devices in the prior art, thereby inventing the present case.

SUMMARY OF THE INVENTION

In order to solve the problem that the detection effect of the existing signal strength detector is poor, the technical solution adopted by the present invention is that the present invention provides a wireless signal strength detection device, which is characterized in that it at least comprises:

An antenna signal processing module, the antenna signal processing module is provided with an antenna signal input end, a low-pass filter and a signal amplifier; A first filtered signal is obtained; the signal amplifier is connected to the low-pass filter, the signal amplifier is used to adjust the amplitude gain of the first filtered signal, and the signal amplifier is also used to provide the signal output end and the The signal strength indicates that the module outputs the amplified signal;

A signal strength indicator module, the signal strength indicator module is provided with a high-pass filter, a detector, an arithmetic unit and a display unit; the high-pass filter is used to filter out the amplified signals from the signal amplifier that are not digital A low-frequency signal commonly used in televisions is used to obtain a second filtered signal; the detector is connected to the high-pass filter, and the detector is used to convert the power of the second filtered signal from the high-pass filter into a DC voltage signal; The operation unit is connected to the detector, and the operation unit is used to operate the DC voltage signal from the detector to obtain an intensity signal representing the operation result; the display unit is connected to the operation unit , the display unit is not only used for receiving the strength signal of the computing unit, but also for performing signal strength indication according to the strength signal;

a power supply module, the power supply module is respectively connected with the antenna signal processing module and the signal strength indicating module, and the power supply module is used for supplying power.

Preferably, the low-pass filter is used to filter out high-frequency signals with a frequency above 790 MHz; the high-pass filter is used to filter out low-frequency signals with a frequency below 470 MHz.

The present invention also provides a wireless signal strength detection device, characterized in that it at least includes:

An antenna signal processing module, the antenna signal processing module is provided with an antenna signal input end, a low-pass filter and a signal amplifier; A first filtered signal is obtained; the signal amplifier is connected to the low-pass filter, the signal amplifier is used to adjust the amplitude gain of the first filtered signal, and the signal amplifier is also used to provide the signal output end and the signal The intensity indicating module outputs the amplified signal;

A signal strength indicating module, the signal strength indicating module is provided with a band-pass filter, a detector, an arithmetic unit and a display unit; the detector is used to convert the second filtered signal from the band-pass filter The power of the detector is converted into a DC voltage signal; the operation unit is connected to the detector, and the operation unit is used to operate the DC voltage signal from the detector to obtain an intensity signal representing the result of the operation; the The display unit is connected with the operation unit, and the display unit is used for receiving the intensity signal of the operation unit, and also used for performing signal intensity indication according to the intensity signal;

a power supply module, the power supply module is respectively connected with the antenna signal processing module and the signal strength indicating module, and the power supply module is used for supplying power.

Preferably, the band-pass filter is a switchable multi-band filter.

Preferably, a switch and a plurality of band-pass filters are arranged in the switchable multi-band filter to switch various frequency bands.

Preferably, it further includes a switch, the switch is connected with the signal strength indicating module, and the switch is used to control the closing or opening of the signal strength indicating module.

Preferably, the wireless signal strength detection device is provided with an antenna, the antenna is connected with the antenna signal processing module through a cable, and the antenna transmits the antenna signal to the antenna signal input through the cable end.

Preferably, the wireless signal strength detection device is provided with an antenna, the antenna is provided with a base, the antenna signal processing module and the signal strength indication module are arranged in the base, and the antenna The signal processing module, the signal strength indicating module and the antenna are integral structures.

Preferably, the signal amplifier is a signal amplifier with low noise figure, high gain, and impedance matching with its input circuit.

Preferably, the display unit is a display screen or a plurality of signal indicators.

Compared with the prior art, the beneficial effects of the present invention are:

The present invention provides a wireless signal strength detection device, which at least includes an antenna signal processing module and a signal strength indicating module. The wireless signal strength detection device performs a two-stage filtering process, firstly using a low-pass filter on the antenna signal processing module. The filter filters out high-frequency signals that are not used by digital TVs, and then uses the high-pass filter on the signal strength indicator module to filter out low-frequency signals that are not commonly used by digital TVs. In this way, signals in the common range of general digital TVs can be filtered out. , and achieve low signal loss and low noise figure wireless signal strength detection at low cost.

Description of drawings

FIG. 1 is a system architecture diagram of a wireless signal strength detection device according to a first embodiment of the present invention;

FIG. 2 is a system architecture diagram of a wireless signal strength detection device according to a second embodiment of the present invention;

3 is a schematic structural diagram of a signal strength indicator module used in conjunction with an independent antenna in Embodiment 1 of the present invention;

4 is a schematic structural diagram of a signal strength indicator module and an antenna integrally disposed in Embodiment 1 of the present invention;

FIG. 5 is a side view of the structure shown in FIG. 4 .

Reference number:

Antenna signal processing module 1, signal strength indicator module 2, power supply module 3, antenna 4, antenna signal input end 10, low pass filter 11, signal amplifier 12, signal output end 13, high pass filter 20, detector 21 . The computing unit 22 , the display unit 23 , the switch 24 , the cable 40 , the base 41 , the wall mount 42 and the wireless signal strength detection device 100 .

Detailed ways

The above and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

In possible descriptions of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front" ", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axis" The orientation or positional relationship indicated by "direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying the indicated device or element It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two unless expressly and specifically defined otherwise.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Example 1

FIG. 1 is a system architecture diagram of a wireless signal strength detection device according to a first embodiment of the present invention. As shown in FIG. 1, the present embodiment provides a wireless signal strength detection device 100, which at least includes an antenna signal processing module 1, a signal strength indicator module 2 (ie, SLI, Signal Level Indicator) and a power supply module Group 3.

The aforementioned antenna signal processing module 1 is provided with an antenna signal input end 10 , and the antenna signal input end 10 is connected to the antenna 4 to obtain the antenna signal from the antenna 4 . The aforementioned antenna signal processing module 1 is provided with a low-pass filter 11 (ie, LPF, Low-frequency Pass Filter) and a signal amplifier 12. The aforementioned low-pass filter 11 can filter out high-frequency signals (frequency about 790MHz and above, depending on each region), the low-pass filter 11 processes the antenna signal to obtain the first filtered signal, so as to avoid high-intensity non-TV signals causing high load and crash of the TV or signal amplifier IC question.

The aforementioned signal amplifier 12 is connected to the aforementioned low-pass filter 11 , the signal amplifier 12 adjusts the amplitude gain of the first filtered signal according to the default gain value, and the signal amplifier 12 outputs the amplified signal to the signal output end 13 and the signal strength indicator module. Group 2, so that the amplified signal of the signal output end 13 can be connected to a digital TV for use. The aforesaid signal amplifier 12 is a signal amplifier with low noise figure, high gain value, and impedance matching (Impedance Matching) with its input circuit.

The aforementioned signal strength indicating module 2 is provided with a high-pass filter (ie HPF, High-frequency Pass Filter) 20 , a detector 21 , an arithmetic unit 22 and a display unit 23 .

The high-pass filter 20 receives the amplified signal of the signal amplifier 12, and filters out low-frequency signals that are not commonly used in digital TVs (frequency is below 470MHz, depending on each region), so that the signals in the common range of general digital TVs can be filtered out. (Frequency about 470MHz to 790MHz, depending on each region). The high-pass filter 20 processes the amplified signal of the signal amplifier 12 to obtain a second filtered signal. The aforementioned high-pass filter 20 outputs the second filtered signal to the detector 21 .

The detector 21 converts the power of the second filtered signal from the high-pass filter 20 into a DC voltage signal, and outputs the DC voltage signal to the computing unit 22 . The aforementioned operation unit 22 operates the DC voltage signal from the aforementioned detector 21 , and outputs the intensity signal of the operation result to the display unit 23 . The aforementioned display unit 23 displays a corresponding signal strength indication according to the received strength signal of the computing unit 22 . The display unit 23 is a display screen or a plurality of signal indicators, depending on the usage requirements. In this way, the user can judge the intensity of the signal through the number of lights or the color change of the plurality of signal indicators, or judge the intensity of the signal directly through the information displayed on the display screen.

A switch 24 is set on the aforementioned signal strength indicating module 2, so that the user can selectively turn off or on the signal strength indicating module 2, so that the signal strength indicating module 2 can be turned off when the signal strength is not needed to be detected, so as to Save unnecessary power consumption.

The power supply module 3 is respectively connected with the antenna signal processing module 1 and the signal strength indicating module 2 , and the power supply module 3 supplies the power for the operation of the antenna signal processing module 1 and the signal strength indicating module 2 . The aforementioned power supply module 3 is preferably a USB power supply system.

FIG. 3 is a schematic structural diagram of a signal strength indicating module used in conjunction with an independent antenna in Embodiment 1 of the present invention. As shown in FIG. 3 , the antenna 4 is a general independent antenna structure, such as a rod-shaped omnidirectional antenna or a plate-shaped directional antenna, and the antenna 4 transmits the antenna signal to the antenna signal processing module 1 through a cable 40 .

Or, as shown in FIG. 4 and FIG. 5, the antenna 4 is provided with a base 41, and the antenna signal processing module 1 and the signal strength indicating module 2 are set in the base 41, so that the antenna signal processing module 1, the signal The strength indicator module 2 and the antenna 4 can form an integrated structure, and the cable 40 is not required between the antenna 4 and the antenna signal processing module 1, so that the cable 40 can be excluded from the antenna signal in the process of transmitting the antenna signal. loss and noise problems. A wall mount 42 is arranged on the antenna 4 to facilitate the fixed position of the antenna 4 . FIG. 4 is a schematic structural diagram of the integrated arrangement of the signal strength indicating module and the antenna according to the first embodiment of the present invention. FIG. 5 is a side view of the unitary structure shown in FIG. 4 .

To sum up, the present invention can manufacture a wireless signal strength detection device with low signal loss and low noise index at low cost through the innovative two-stage filtering technology, and the signal strength indicator module 2 can also be used according to different requirements. Replace the high-pass filter 20 with a band-pass filter (BPF) or a switchable multi-band filter for better overall signal quality and more accurate antenna placement orientation, avoiding signal strength detection results being misled by specific strong signals .

Embodiment 2

The difference between this embodiment and the first embodiment is that:

FIG. 2 is a system structure diagram of a wireless signal strength detection apparatus in Embodiment 2 of the present invention. As shown in FIG. 2 , this embodiment provides another wireless signal strength detection apparatus. In order to avoid the signal strength detection result being misled by a strong signal, if the signal strength in a frequency band is known to be weak in a region, the aforementioned high-pass filter 20 of the wireless signal strength detection device provided in the first embodiment can be used. Replace with a band pass filter (BPF) or a switchable multi-band pass filter. In this way, the user can perform signal strength detection especially for the frequency band with weak signal strength, so as to obtain a better and more accurate antenna setting orientation with better overall signal quality.

The aforementioned switchable multi-band filter is provided with a plurality of band-pass filters and a switch for switching between various frequency bands.

The above are only preferred embodiments of the present invention, which are merely illustrative rather than restrictive for the present invention. The structure and connection mode of each component in the present invention can be changed to some extent, and all equivalent transformations and improvements made on the basis of the technical solutions of the present invention should not be excluded from the protection scope of the present invention.

Claims (10)

1. A wireless signal strength detecting device, comprising:

the antenna signal processing module is provided with an antenna signal input end, a low-pass filter and a signal amplifier; the low-pass filter is used for filtering out high-frequency signals which are not used by the digital television so as to obtain a first filtering signal; the signal amplifier is connected with the low-pass filter, is used for adjusting the amplitude gain of the first filtering signal, and is also used for outputting an amplified signal to the signal output end and the signal strength indicating module;

the signal intensity indicating module is provided with a high-pass filter, a detector, an arithmetic unit and a display unit; the high-pass filter is used for filtering out low-frequency signals which are not commonly used by the digital television in the amplified signals from the signal amplifier so as to obtain second filtered signals; the detector is connected with the high-pass filter and is used for converting the power of the second filtered signal from the high-pass filter into a direct-current voltage signal; the arithmetic unit is connected with the detector and is used for calculating a direct-current voltage signal from the detector to obtain an intensity signal representing an operation result; the display unit is connected with the arithmetic unit, and the display unit is used for receiving the intensity signal of the arithmetic unit and also used for indicating the signal intensity according to the intensity signal;

and the power supply module is respectively connected with the antenna signal processing module and the signal intensity indicating module, and is used for supplying electric power.

2. The apparatus as claimed in claim 1, wherein the low pass filter is used for filtering out high frequency signals with a frequency above 790 MHz; the high-pass filter is used for filtering low-frequency signals with the frequency below 470 MHz.

3. A wireless signal strength detecting device, comprising:

the antenna signal processing module is provided with an antenna signal input end, a low-pass filter and a signal amplifier; the low-pass filter is used for filtering out high-frequency signals which are not used by the digital television so as to obtain a first filtering signal; the signal amplifier is connected with the low-pass filter, is used for adjusting the amplitude gain of a first filtering signal, and is also used for outputting an amplified signal to the signal output end and the signal strength indicating module;

the signal intensity indicating module is provided with a band-pass filter, a wave detector, an arithmetic unit and a display unit; the detector is used for converting the power of the second filtered signal from the band-pass filter into a direct-current voltage signal; the arithmetic unit is connected with the detector and is used for calculating a direct-current voltage signal from the detector to obtain an intensity signal representing an operation result; the display unit is connected with the arithmetic unit, and the display unit is used for receiving the intensity signal of the arithmetic unit and also used for indicating the signal intensity according to the intensity signal;

and the power supply module is respectively connected with the antenna signal processing module and the signal intensity indicating module, and is used for supplying electric power.

4. The apparatus of claim 3, wherein the band-pass filter is a switchable multi-band filter.

5. The apparatus as claimed in claim 4, wherein the switchable multiband filter comprises a switch and a plurality of band pass filters for switching a plurality of bands.

6. The apparatus according to any of claims 1-5, further comprising a switch connected to the signal strength indicating module, wherein the switch is used to control the signal strength indicating module to turn off or on.

7. A device as claimed in any one of claims 1 to 5, wherein the device is provided with an antenna, the antenna is connected to the antenna signal processing module through a cable, and the antenna transmits the antenna signal to the antenna signal input terminal through the cable.

8. The apparatus according to any of claims 1-5, wherein the apparatus is provided with an antenna, the antenna is provided with a base, the antenna signal processing module and the signal strength indicating module are disposed in the base, and the antenna signal processing module, the signal strength indicating module and the antenna are integrated.

9. The apparatus as claimed in any one of claims 1-5, wherein the signal amplifier has a low noise figure, a high gain, and an impedance matching with its input circuit.

10. The apparatus as claimed in any one of claims 1 to 5, wherein the display unit is a display screen or a plurality of signal indicating lamps.

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