CN216356753U - Wireless signal shielding device - Google Patents
Wireless signal shielding device Download PDFInfo
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- CN216356753U CN216356753U CN202123270139.2U CN202123270139U CN216356753U CN 216356753 U CN216356753 U CN 216356753U CN 202123270139 U CN202123270139 U CN 202123270139U CN 216356753 U CN216356753 U CN 216356753U
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Abstract
The utility model relates to the technical field of signal shielding devices, in particular to a wireless signal shielding device, which comprises: the shell is provided with a cavity for accommodating an electronic device and a heat dissipation window communicated with the cavity; the main control board is arranged in the accommodating cavity, and a radiator is arranged on one side of the main control board; a plurality of sets of shielded signal components. According to the working state of each shielding signal assembly, the rotating speed of the cooling fan at the corresponding position of each shielding signal assembly is adjusted, so that only the cooling fan at the corresponding position is started when only the transmitting module corresponding to part of shielding signals in the shielding device works, the rotating speed of the cooling fan at the corresponding position is relatively low when the transmitting module is in a low-power working state, and the cooling fan is in high-speed operation only when the transmitting module is in a high-power state to meet the requirement of heat dissipation, so that the internal and external airflow exchange is reduced as much as possible under the condition of meeting the requirement of heat dissipation, the internal dust accumulation is reduced, and the heat conduction and heat exchange heat dissipation effect is improved.
Description
Technical Field
The utility model relates to the technical field of signal shields, in particular to a high-power wireless signal shield with improved heat dissipation control, which is suitable for outdoor occasions such as prisons and examination rooms or particularly scenes needing high power and large-range coverage.
Background
The signal shielding device is widely applied to places such as examination rooms, prisons, detention houses and the like, can effectively prevent personnel from using mobile phones in a violation mode, guarantees fairness and justness of examinations, and maintains order safety of prisons. The shielding area and frequency band of the signal shielding device are related to the power, amplitude, frequency and bandwidth of the shielding signal component, and the coverage range is controlled by adjusting the power.
For different use scenes, such as examination rooms, meeting rooms and other small spaces, low-power shields with large power are used, and outdoor areas with large areas are provided with high-power shields, so that some shields can be set in high-power and low-power modes to meet field requirements.
The inventor finds that the wind speed of the heat dissipation fan is constant, and in order to meet the high-power heat dissipation requirement, the wind speed of the heat dissipation fan is set to be faster, especially to reach more than 3000r/min, so that the heat dissipation effect is better, but the heat dissipation effect is more, the heat exchange with the external air flow is high, the internal dust deposition speed is high, and the heat dissipation is seriously influenced; and the long-term operation under high load has a serious influence on the life.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects and shortcomings of the shielding device in the prior art, the utility model aims to adjust the working state of the heat dissipation fan, particularly drive the heat dissipation fan to run at a relatively low speed when the device is in a low-power running state, and improve the energy efficiency and the service life.
The utility model aims to provide a wireless signal shielding device, which comprises:
the shell is provided with a cavity for accommodating an electronic device and a heat dissipation window communicated with the cavity;
the main control board is arranged in the accommodating cavity, and a radiator is arranged on one side of the main control board;
each group of shielding signal assemblies is provided with a plurality of shielding signal generation modules which are all electrically connected to the main control board; each shielding signal generating module is used for generating shielding signals of corresponding frequency bands;
the heat radiation fans are correspondingly arranged at the bottom of each group of the shielding signal assemblies, and air flow enters from the heat radiation windows through air draft and flows through the shielding signal assemblies and the radiators to realize heat radiation;
the power supply module is electrically connected to the main control board and used for supplying power to the shielding signal assembly;
the main control board comprises an emission module driving circuit, a power judgment module and a cooling fan driving circuit, wherein the emission module driving circuit is provided with a microprocessor and is set to be controlled from the outside to enable each shielding signal component to be in a first power state or a second power state;
the power judgment module is used for detecting the power state of each shielding signal assembly and transmitting the power state to the cooling fan driving circuit, so that the cooling fan driving circuit drives the corresponding cooling fan to rotate in response to the working power state of the shielding signal assembly.
Preferably, in the shielding signal assembly, when the number of the shielding signal generating modules working at the second power is less than two, the power determining module outputs the first signal to control the cooling fan driving circuit to drive the corresponding cooling fan to keep the first wind speed.
Preferably, in the shielding signal assembly, when the number of the shielding signal generating modules working at the second power is greater than or equal to two, the power determining module outputs the second signal to control the cooling fan driving circuit to drive the corresponding cooling fan to keep the second wind speed; the second power is greater than the first power.
Preferably, each set of the masking signal assemblies includes three masking signal generating modules, each for generating a masking signal of a predetermined frequency.
Preferably, the heat dissipation fans are disposed at the bottom of the heat sink and distributed along the arrangement direction of the shielding signal assemblies.
Preferably, the heat dissipation fan is an axial flow heat dissipation fan.
Preferably, the axis of the heat dissipation fan is parallel to the length direction of the shielding signal assembly.
Compared with the prior art, the utility model has the advantages that:
according to the working state of each shielding signal assembly, the rotating speed of the cooling fan at the corresponding position of each shielding signal assembly is adjusted, so that only the cooling fan at the corresponding position is started when only the transmitting module corresponding to part of shielding signals in the shielding device works, the rotating speed of the cooling fan at the corresponding position is relatively low when the transmitting module is in a low-power working state, and the cooling fan is in high-speed operation only when the transmitting module is in a high-power state to meet the requirement of heat dissipation, so that the internal and external airflow exchange is reduced as much as possible under the condition of meeting the requirement of heat dissipation, the internal dust accumulation is reduced, and the heat conduction and heat exchange heat dissipation effect is improved.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a wireless signal shielding device according to the present invention;
fig. 2 is a functional block diagram of a wireless signal masker shown in the present invention.
Detailed Description
In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.
The utility model aims to provide a wireless signal shielding device, which is mainly used for shielding GPS frequency band signals, WIFI and 2/3/4/5G signals, low-power small-area shielding and high-power large-area shielding under different requirements in occasions with changing use scenes, such as vehicle-mounted signal shielding devices of patrol cars, escort cars and the like.
As shown in fig. 1-2, the wireless signal shielding device mainly includes a housing, a main control board 1, a heat sink 2, a signal shielding component 3, a power module, and a heat dissipation fan 5.
The shell 1 is formed by splicing two injection-molded shells and is fixed by fasteners such as screws, and a cavity for accommodating electronic devices is formed inside the shell after splicing. It should be understood that, in order to ensure ventilation, a heat dissipation window communicated with the cavity is arranged on the side surface to serve as an air inlet, and an air outlet is arranged at the bottom of the shell 1.
The main control board is arranged in the accommodating cavity and comprises a PCB (printed circuit board) and a driving circuit, a control circuit, a power circuit and the like which are welded on the PCB, and the PCB is fixed on the shell on one side through a limiting column formed by injection molding on a screw or the shell. Optionally, a heat sink 2 is disposed on one side of the main control board; the heat sink 2 is designed close to the heat dissipation window of the housing.
Further, the plurality of shielding signal generating modules 301 are divided into a plurality of groups and electrically connected to the main control board 1. Each shielding signal generating module 301 is configured to generate shielding signals of different frequencies and radiate the shielding signals through an antenna, such as shielding signals of different GPS frequency bands, shielding signals of 2/3/4/5G frequency band, and shielding signals of 2.4GWiFi/5.8GWiFi frequency band. In an alternative embodiment, the circuit and control strategy of the mask signal generating module, including its frequency, bandwidth, etc., may be implemented using the applicant's existing product design.
As shown in fig. 1, the top of the signal shielding assembly 3 has signal connection terminals 31 for mounting an antenna through which the shielding signal is transmitted.
In an alternative embodiment, every three shielding signal generating modules 301 are divided into a group to form the shielding signal assembly 3, and correspond to one heat dissipation fan 5.
The cooling fan 5 is correspondingly arranged at the bottom of each group of shielding signal assemblies 3, and air flow enters from the cooling window and flows through the shielding signal assemblies 3 and the radiator 2 to realize cooling through air draft.
Specifically, the power module 4 is installed and connected to the main control board 1, and is used for supplying power to the shielding signal assembly 3 and the cooling fan 5. The heat radiation fan 5 is disposed below the main control board 1, and radiates heat from the heat sink 2, the power module 4, and the shielded signal assembly 3. Alternatively, the heat dissipation fans 5 are disposed at the bottom of the heat sink 2 and distributed along the arrangement direction of the shielding signal assemblies 3. The heat radiation fan 5 adopts an axial flow heat radiation fan, and the axis of the heat radiation fan 5 is parallel to the length direction of the shielding signal component 3. Thus, when rotating, the airflow flows over the shielding signal assembly 3 and the heat sink 2, namely, the corresponding positions, so as to realize local heat dissipation.
Preferably, the shielding signal generating modules in the GPS frequency band and the 2/3G frequency band are divided into a group, the shielding signal generating module in the 3/4/5G frequency band is divided into a group, and the shielding signal generating modules in the 5G and 2.4GWiFi/5.8GWiFi frequency bands are divided into a group, where each group includes an overlapping shielding signal generating module.
The coverage area of the heat dissipation fan 5 is larger than the width of the two shielding signal generation modules, so as to ensure that the three heat dissipation fans 5 can dissipate heat of the shielding signal generation modules.
The main control board 1 includes a transmission module driving circuit 11, a power determining module 13, and a cooling fan driving circuit 12, where the transmission module driving circuit 11 has a microprocessor configured to be controlled from the outside to enable each shielding signal generating module 3 to be in a first power state or a second power state.
In further embodiments, the operating state of the mask signal generation module may be set to automatically switch in a set manner.
The power determining module 13 is configured to detect a power state of each shielding signal component 3, and transmit the power state to the cooling fan driving circuit 12, so that the cooling fan driving circuit 12 drives the corresponding cooling fan 5 to rotate at a set rotation speed in response to the working power state of the shielding signal generating module in each group. Wherein the first power state is 3-80W and the second power state is 80-160W.
Optionally, the power determining module 13 includes three small logic control circuits, which respectively correspond to each group of shielding signal components. When the transmitting module driving circuit 11 controls the single shielding signal component 3 to be in the first power state, the low level is output at the same time, and when the transmitting module driving circuit 11 controls the single shielding signal component 3 to be in the second power state, the high level is output at the same time.
Thus, when the input of the logic control circuit is less than two high levels, a low level, namely a first signal, is output outwards; when the input of the logic control circuit is more than or equal to two high levels, a high level, namely a second signal is output outwards.
Specifically, when the number of the shielding signal generating modules at the second power in each group of shielding signal assemblies is less than two, the power determining module 13 outputs the first signal, so that the cooling fan driving circuit 12 drives the cooling fan 5 to keep the first wind speed.
Preferably, when more than two shielding signal generating modules in each group of shielding signal assemblies are at the second power, the power determining module 13 outputs the second signal, so that the cooling fan driving circuit 12 drives the cooling fan 5 to maintain the second wind speed.
In the embodiment of the utility model, the heat dissipation fan can be a general silent axial flow heat dissipation fan, such as a 6015 type 12VDC silent heat dissipation fan, and can realize the adjustment within the range of 1000-.
With the above embodiments, the utility model adjusts the rotation speed of the cooling fan at the corresponding position according to the working state of each shielding signal component, so that when only the transmitting circuit corresponding to part of shielding signals in the shielding device works, only the cooling fan at the corresponding position is started, when the transmitting module is in the low-power working state, the rotation speed of the cooling fan at the corresponding position is relatively low, and only when the transmitting module is in the high-power state, the cooling fan is in the high-speed operation to satisfy the heat dissipation, therefore, under the condition of satisfying the heat dissipation, the internal and external air flow exchange is reduced as much as possible, the internal dust accumulation is reduced, and the heat conduction and heat exchange heat dissipation effect is improved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (7)
1. A wireless signal masker, comprising:
the shell is provided with a cavity for accommodating an electronic device and a heat dissipation window communicated with the cavity;
the main control board is arranged in the accommodating cavity, and a radiator is arranged on one side of the main control board;
each group of shielding signal assemblies is provided with a plurality of shielding signal generation modules which are all electrically connected to the main control board; each shielding signal generating module is used for generating a shielding signal;
the heat radiation fans are correspondingly arranged at the bottom of each group of shielding signal assemblies, and air flow enters from the heat radiation windows through air draft and flows through the shielding signal assemblies and the radiators to realize heat radiation;
the power supply module is electrically connected to the main control board and used for supplying power to the shielding signal assembly;
the main control board comprises an emission module driving circuit, a power judgment module and a cooling fan driving circuit, wherein the emission module driving circuit is provided with a microprocessor and is set to be controlled from the outside to enable each shielding signal component to be in a first power state or a second power state;
the power judgment module is used for detecting the power state of each shielding signal assembly and transmitting the power state to the cooling fan driving circuit, so that the cooling fan driving circuit drives the corresponding cooling fan to rotate in response to the working power state of the shielding signal assembly.
2. The wireless signal shielding device of claim 1, wherein in the shielding signal assembly, when the number of the shielding signal generating modules working at the second power is less than two, the power determining module outputs the first signal to control the heat dissipation fan driving circuit to drive the corresponding heat dissipation fan to maintain the first wind speed.
3. The wireless signal shielding device according to claim 2, wherein in the shielding signal assembly, when the number of the shielding signal generating modules operating at the second power is greater than or equal to two, the power determining module outputs the second signal to control the cooling fan driving circuit to drive the corresponding cooling fan to maintain the second wind speed; the second power is greater than the first power.
4. The wireless signal masker of claim 1, wherein each set of the masking signal components comprises three masking signal generating modules, each for generating a masking signal of a predetermined frequency.
5. The wireless signal shielding device of claim 1, wherein the heat dissipation fan is disposed at the bottom of the heat sink and distributed along the arrangement direction of the signal shielding components.
6. The wireless signal shield of claim 1, wherein the heat sink fan comprises an axial heat sink fan.
7. The wireless signal shield of claim 1, wherein an axis of the heat dissipation fan is parallel to a length direction of the signal-shielding assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123270139.2U CN216356753U (en) | 2021-12-23 | 2021-12-23 | Wireless signal shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123270139.2U CN216356753U (en) | 2021-12-23 | 2021-12-23 | Wireless signal shielding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216356753U true CN216356753U (en) | 2022-04-19 |
Family
ID=81166622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123270139.2U Active CN216356753U (en) | 2021-12-23 | 2021-12-23 | Wireless signal shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216356753U (en) |
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2021
- 2021-12-23 CN CN202123270139.2U patent/CN216356753U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20230506 Address after: Floor 3-4, Building 37, Liandong U-Valley, No. 1001 Fuying Road, Nanjing, Jiangsu Province, 211100 (Jiangning High tech Park) Patentee after: Nanjing Jiama Security Technology Co.,Ltd. Address before: 211000 No. 1, Fangyuan Middle Road, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Patentee before: NANJING BOKANG ELECTROMECHANICAL TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |