Mobile video surveillance device and wireless adapter thereof

Abstract

The invention discloses a mobile video monitoring device and a wireless adapter thereof, wherein the wireless adapter is used for accessing an improved WiFi system; the wireless adapter comprises a power module, a plurality of antennas, an interface module, an AP module and a network port; the AP module comprises a WiFi control module; a first end of the WiFi control module is connected to the network port, and a second end of the WiFi control module is connected to the antenna; the WiFi control module comprises a baseband processing unit; the baseband processing unit is provided with a control register for controlling the output of a baseband modulation signal; the baseband processing unit is connected to the antenna to receive a regional attribute data frame received by the antenna, and outputs a modification instruction to the control register based on the regional attribute data frame to modify the value of the control register; the baseband processing unit can adjust its own transmission power according to the regional attribute data frame, so that the power control of the wireless adapter is within the power range of an electromagnetic sensitive area.

Description

Technical Field

[0001] The invention relates to the field of wireless adapters, and in particular to a mobile video monitoring device and a wireless adapter thereof. Background Art

[0002] The wireless adapters in the related art generally only have traditional wireless functions such as wireless signal access, wireless signal transmission, and wireless signal relay.

[0003] However, considering that nuclear power plants contain a large number of key on-site production system equipment that is sensitive to electromagnetic signals, such equipment is much more sensitive to electromagnetic signals than ordinary equipment. In general, wireless devices are prohibited from being used near such equipment. Once electromagnetic interference occurs and causes such equipment to shut down, it will have a more serious impact on the nuclear power plant. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a mobile video monitoring device and a wireless adapter thereof in view of at least one defect in the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problem is: constructing a wireless adapter for accessing an improved WiFi system, wherein the improved WiFi system is used to broadcast a regional attribute data frame containing transmission power requirement information;

[0006] The wireless adapter includes a power module, multiple antennas, an interface module, an AP module, and a network port for accessing an IoT device;

[0007] The power module is electrically connected to the AP module to provide working power;

[0008] The AP module includes a WiFi control module for demodulating wireless signals and modulating data from the network port into radio frequency signals; a first end of the WiFi control module is connected to the network port, and a second end of the WiFi control module is connected to the antenna;

[0009] The WiFi control module includes a baseband processing unit for digital-to-analog conversion; the baseband processing unit is provided with a control register for controlling the output of the baseband modulation signal;

[0010] The baseband processing unit is connected to the antenna to receive the regional attribute data frame received by the antenna, and outputs a modification instruction to the control register based on the regional attribute data frame to modify the value of the control register.

[0011] Preferably, the AP module further comprises a radio frequency amplification module for amplifying the signal; two ends of the radio frequency amplification module are respectively connected to the WiFi control module and the antenna.

[0012] Preferably, the wireless adapter further comprises an access authentication module for acquiring control data from a WiFi network, and an encryption module for parsing the real control data according to the control data;

[0013] The first end of the access authentication module is connected to the antenna through the interface module to receive control data from the WiFi network; the second end of the access authentication module is connected to the AP module to send the control data to the AP module;

[0014] The encryption module is connected to the AP module to interact with the AP module.

[0015] Preferably, the WiFi control module includes a 2.4G WiFi chip and / or a 5G WiFi chip.

[0016] Preferably, the 2.4G WiFi chip adopts a WiFi chip of model QCA9531.

[0017] Preferably, the 5G WiFi chip adopts a WiFi chip with model number QCA9887.

[0018] Preferably, the power module includes a transformer unit, a TVS protection unit, a first battery management unit, and a second battery management unit;

[0019] The first end of the transformer unit is connected to the input power supply, the second end of the transformer unit is connected to the first end of the TVS protection unit, the second end of the TVS protection unit is connected to the first end of the first battery management unit, the second end of the first battery management unit is connected to the first end of the AP module in one way, the second end of the first battery management unit is connected to the first end of the second battery management unit in another way, and the second end of the second battery management unit is respectively connected to the second end of the AP module and the access authentication module.

[0020] Preferably, the real control data includes authentication information for the WiFi control module to access the WiFi network; the authentication information includes an SSID name and an SSID password.

[0021] The present invention also constructs a mobile video monitoring device, comprising a control console, a WiFi system for providing a WiFi network, a wireless adapter for accessing the WiFi network, and a movable image acquisition device for acquiring image data;

[0022] The wireless adapter is the above-mentioned wireless adapter for accessing the improved WiFi system;

[0023] The WiFi system is also used to broadcast a regional attribute data frame containing transmission power requirement information;

[0024] The image acquisition device accesses the WiFi network through the wireless adapter to transmit the image data to the console.

[0025] Preferably, the image acquisition device includes a camera.

[0026] The implementation of the present invention has the following beneficial effects: the present invention constructs a wireless adapter based on the improved WiFi system. Compared with the wireless adapter in the related art, the wireless adapter can adjust its own transmission power according to the regional attribute data frame, so that the power of the wireless adapter is within the power range of the electromagnetic sensitive area, avoiding electromagnetic interference to the equipment and ensuring the electromagnetic safety of the electromagnetic sensitive area. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0028] Figure 1 It is a circuit principle block diagram of a wireless adapter for accessing an improved WiFi system according to the present invention;

[0029] Figure 2 yes Figure 1 The circuit principle block diagram of the AP module;

[0030] Figure 3 yes Figure 1 Circuit principle block diagram of the power module. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0032] It should be noted that the flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor do they have to be executed in the order described. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0033] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0034] The present invention constructs a wireless adapter that can be applied to electromagnetically sensitive areas containing an improved WiFi system, such as nuclear power plants. The improved WiFi system can provide an improved WiFi network; the improved WiFi network is a system network that improves traditional WiFi technology in terms of electromagnetic safety, information security, and radiation protection in electromagnetically sensitive areas. For example, in terms of improvement in electromagnetic safety, the improved WiFi network adds Internet of Things technology, such as periodically broadcasting regional attribute data frames of the base stations to which it belongs through wireless APs, so as to achieve power controllability of base stations and devices and avoid electromagnetic interference; for example, in terms of information security, the wireless network SSID is invisible, the password changes dynamically, and other measures are taken.

[0035] The wireless adapter can be configured with appropriate transmission power according to different electromagnetic sensitive areas; when the wireless adapter is powered on and used in different areas, the transmission power of the wireless adapter will be adjusted according to the power configuration of the area, so that the power of the wireless adapter is kept within the preset range to avoid electromagnetic interference to the device.

[0036] The above-mentioned appropriate transmission power can be understood as the electromagnetic interference generated by the transmission power of the wireless adapter does not affect the normal operation of the equipment in the electromagnetic sensitive area; the above-mentioned preset range can be understood as the allowable range of the wireless signal power in the electromagnetic sensitive area.

[0037] like Figure 1-Figure 3 As shown, in some embodiments, the wireless adapter includes multiple antennas, a power module, an interface module, an AP module, and a network port.

[0038] The power module is connected to the AP module circuit module to provide working power; the power module can also provide working power for other circuit modules such as access authentication module and encryption module. The antenna is connected to the AP module through the interface module to connect the WiFi network to the AP module. The AP module can receive data from the WiFi network through the antenna, and / or the AP module sends data to the WiFi network through the antenna. The network port can be connected to the Internet of Things device, so that the Internet of Things device is connected to the AP module; the Internet of Things device can be a camera. The AP module is used as a control and data forwarding module, which is not only used to process and bidirectionally forward data from the network port and the antenna, so that data is transmitted between the Internet of Things device and the WiFi network (through the AP module), but also can be used to control and adjust the transmission power of the wireless adapter according to the regional attribute data frame sent by the wireless AP.

[0039] In some embodiments, the wireless adapter further includes an access authentication module and an encryption module. One end of the access authentication module is connected to the antenna through the interface module, and the other end of the access authentication module is connected to the AP module, which is used to receive control data from the WiFi network and send it to the AP module to complete the access authentication between the wireless adapter and the WiFi network. The encryption module is connected to the AP module, which is used to interact with the AP module and parse the control data received by the access authentication module to obtain the real control data.

[0040] The wireless adapter of the present invention also has other general circuit modules for supporting its normal operation. The general circuit modules can be referred to in the relevant technology and will not be described in detail here.

[0041] The AP module has a WiFi interface, an encryption interface, and an authentication interface. The WiFi interface is used to access the WiFi network, the encryption interface is used to access the encryption module, and the authentication interface is used to access the access authentication module. After the AP module controls its WiFi interface to access the WiFi network, the AP module will bidirectionally forward the data between the network port and the WiFi interface, that is, the IoT device can access the WiFi network on site through the wireless adapter, and transmit the data to the background through the AP module. The background can be a console that accesses the WiFi network.

[0042] like Figure 2 As shown, in some embodiments, the AP module may include a WiFi control module and a radio frequency amplification module electrically connected to the WiFi module. The WiFi control module includes a baseband processing unit for demodulating wireless signals and modulating data from the network port into radio frequency signals; the baseband processing unit can also receive regional attribute data frames, obtain the required information of the transmission power therein, and adjust the value of its control register according to the required information of the transmission power, so as to adjust the amplitude output of the baseband signal. The radio frequency amplification module is used to amplify the signal, and it includes multiple radio frequency amplifiers. The wireless signal received by the antenna is amplified by the radio frequency amplification unit and then transmitted to the WiFi control module, and / or the data signal output by the WiFi control module is amplified by the radio frequency amplification unit and then sent via the antenna.

[0043] It can be understood that the wireless AP in the electromagnetic sensitive area will pre-configure the terminal transmission power requirements of the base station to which it belongs according to the requirements of the electromagnetic sensitive area to which it belongs; and the wireless AP will periodically broadcast the regional attribute data frame of the base station to which it belongs through the Internet of Things channel. The regional attribute data frame contains information such as area ID, area type, and transmission power requirements.

[0044] After the wireless adapter receives the regional attribute data frame within the current range, it sends it to its AP module, which processes the regional attribute data frame, that is, periodically determines the base station to which the wireless adapter belongs based on the signal strength of each data frame, and obtains the regional type and transmission power requirement information of the base station from the regional attribute data frame; then, the AP module transmits the transmission power requirement information to its baseband processing unit, and the baseband processing unit outputs a modification instruction to the control register based on the regional attribute data frame. After receiving the modification instruction, the control register modifies the value stored in itself, thereby modifying the baseband signal amplitude output, and completing the adjustment of the RF transmission power of the wireless adapter.

[0045] It can be understood that the transmission signal of the baseband processing unit is digitally modulated (MOD) and then output as a baseband signal through digital-to-analog conversion. The set control register controls the gain of the digital-to-analog conversion to control the output of the baseband modulation signal and adjust the transmission power of the wireless adapter to an appropriate transmission power.

[0046] In some embodiments, the WiFi control module includes at least one, which may be a 2.4G WiFi chip or a 5G WiFi chip. In other embodiments, the AP module includes two WiFi control modules, namely a 2.4G WiFi chip and a 5G WiFi chip. Optionally, the 2.4G WiFi chip may use a WiFi chip of model QCA9531; and / or, the 5G WiFi chip may use a WiFi chip of model QCA9887.

[0047] In this embodiment, the plurality of RF amplification units include three RF amplifiers, which can be divided into a first RF amplifier, a second RF amplifier, and a third RF amplifier. The first end of the first RF amplifier is connected to the first antenna, the second end of the first RF amplifier is connected to the first receiving end of the 2.4G WiFi chip, and the third end of the first RF amplifier is connected to the first transmitting end of the 2.4G WiFi chip; the first end of the second RF amplifier is connected to the third antenna, the second end of the second RF amplifier is connected to the second receiving end of the 2.4G WiFi chip, and the third end of the second RF amplifier is connected to the second transmitting end of the 2.4G WiFi chip; the first end of the third RF amplifier is connected to the second antenna, the second end of the second RF amplifier is connected to the receiving end of the 5G WiFi chip, and the third end of the third RF amplifier is connected to the transmitting end of the 5G WiFi chip.

[0048] The access authentication module has a wireless authentication interface, which is used to interact with the WiFi network to obtain control data of the WiFi network. In this embodiment, the access authentication module receives the control data of the WiFi network through the third antenna and sends the control data to the AP module.

[0049] After the access authentication module receives the control data of the WiFi network and sends it to the AP module, the AP module interacts with the encryption module to parse out the real control data. The real control data includes the authentication information necessary for the WiFi control module of the AP module to access the WiFi network, such as the SSID name, SSID password, etc. The AP module controls its WiFi interface to access the WiFi network based on the real control data, thus achieving information security.

[0050] In some embodiments, the multiple antennas include a first antenna, a second antenna and a third antenna. The first antenna is connected to the 2.4G WiFi chip of the AP module through an interface module, the second antenna is connected to the 5G WiFi chip of the AP module through an interface module, and the third antenna is connected to the first end of the access authentication module through the interface module.

[0051] In some embodiments, the interface module includes a plurality of radio frequency interfaces. The plurality of radio frequency interfaces are used to access antennas; in some embodiments, the radio frequency interface may be a NK radio frequency interface.

[0052] In some embodiments, the network port can be an RJ-45 interface.

[0053] In some embodiments, Figure 3 As shown, the power module includes a transformer unit, a TVS protection unit, a first battery management unit, and a second battery management unit; specifically, the first end of the transformer unit is connected to the input power supply, the second end of the transformer unit is connected to the first end of the TVS protection unit, the second end of the TVS protection unit is connected to the first end of the first battery management unit, the second end of the first battery management unit is connected to the first end of the AP module, the second end of the first battery management unit is connected to the first end of the second battery management unit in another way, and the second end of the second battery management unit is respectively connected to the second end of the AP module, the access authentication module, and other module units.

[0054] In this embodiment, the power module further includes a first voltage regulator tube D1 and a second voltage regulator tube D2; the connection method of the two voltage regulator tubes can refer to Figure 3 shown.

[0055] It can be understood that the transformer unit is used to rectify and transform the input power supply and generate a first power supply. The first power supply can provide a corresponding working power supply. In some embodiments, the first power supply is 12V. The first power supply outputs a corresponding suitable working power supply to the AP module, the access authentication module, and other module units after passing through the first battery management unit and the second battery management unit. The above-mentioned other module units include an encryption module, a general circuit module, and the like.

[0056] In some embodiments, the first battery management unit and the second battery management unit may use a battery management chip of model TPS54360DDA.

[0057] Preferably, the wireless adapter supports hardware watchdog, supports connecting the camera through the RJ-45 interface, supports logging into the network card management interface using SSH after configuring the network card to a specific address segment, supports working as a layer 2 network device (bridging), can be configured through the management interface, supports access to improved WiFi networks through the Internet of Things channel, 2.4GWiFi, and 5GWiFi, supports setting channels, supports 802.11a / b / g / n, supports encryption methods WPA-PSK and WPA2-PSK, supports activation software to connect to the network card through the rawsocket protocol, supports activating the network card through the activation software, supports querying the Internet of Things ID and MAC address through the activation software, Terminal type, network switch status, encryption algorithm type and other parameters, configure terminal password (used to authenticate users during SSH login), privilege password, network function switch, encryption algorithm type, IoT ID, PANID, IoT channel, password library network permissions and other parameters, the network switch status can only be set to access the improved WiFi network, support configuration of national encryption (SM2, SM3, SM4) algorithms through activation software, support configuration of commercial encryption (RSA, AES, MD5) algorithms through activation software, support 2.4G and 5G to interact with the system through activation information, access to the improved WiFi network, the RF transmission is in the off state when powered on, support regional broadcast processing, and support regional switching. Optional areas include non-restricted area, power control area, restricted area and non-singularity network area, support setting IOT and WiFi transmission power according to regional broadcast, support controlling RF switch, support turning off RF transmission, support persistent recording of key logs without loss during power failure, logs include kernel logs and application logs, a total of 500KB space is used in a circular manner, that is, after exceeding 500K, the new log overwrites the oldest log, support setting application log level, support IoT node data sending and receiving, support resetting IoT MCU, support IoT MCU upgrade, support controlling LED through IoT MCU, support setting IoT logical ID, support setting IoT PANID, support setting IoT transmission power, support setting IoT channel, support national secret chip reset, and support national secret chip upgrade.

[0058] The present invention also constructs a mobile video monitoring device, comprising a control console, a WiFi system for providing a WiFi network, a wireless adapter for accessing the WiFi network, and a movable image acquisition device for acquiring image data;

[0059] The WiFi system is also used to broadcast a regional attribute data frame containing transmission power requirement information. In some embodiments, the WiFi system includes a wireless AP, which can provide a WiFi network and broadcast a regional attribute data frame.

[0060] In some embodiments, the control console may be an operating station for monitoring equipment in a nuclear power plant.

[0061] The wireless adapter is the wireless adapter mentioned above.

[0062] The image acquisition device accesses the WiFi network through a wireless adapter to transmit the image data to the console. In some embodiments, the image acquisition device includes a camera.

[0063] In summary, the present invention constructs a wireless adapter based on an improved WiFi system. Compared with the wireless adapter in the related art, the wireless adapter can adjust its own transmission power according to the regional attribute data frame, so that the power of the wireless adapter is within the power range of the electromagnetic sensitive area, avoiding electromagnetic interference to the equipment and ensuring the electromagnetic safety of the electromagnetic sensitive area.

[0064] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A mobile video monitoring device used in the field of nuclear power, characterized in that: The invention comprises a control console, an improved WiFi system for providing a WiFi network, a wireless adapter for accessing the WiFi network, and a movable image acquisition device for acquiring image data; The improved WiFi system periodically broadcasts a regional attribute data frame containing the transmission power requirement information of the corresponding base station through a wireless AP in an Internet of Things channel; the regional attribute data frame includes regional ID, regional type, and transmission power information; The wireless AP pre-configures the terminal transmission power requirements of the base station to which it belongs according to the requirements of the electromagnetic sensitive area to which it belongs before periodically broadcasting the regional attribute data frame of the base station to which it belongs; The wireless adapter includes a power module, multiple antennas, an interface module, an AP module, and a network port for accessing an IoT device; The power module is electrically connected to the AP module to provide working power; After receiving the area attribute data frame within the current range, the wireless adapter sends it to its AP module; The AP module periodically determines the base station to which the wireless adapter belongs according to the signal strength of each data frame, and obtains the information of the area type and transmission power requirement of the base station from the area attribute data frame; The AP module includes a WiFi control module for demodulating wireless signals and modulating data from the network port into radio frequency signals; a first end of the WiFi control module is connected to the network port, and a second end of the WiFi control module is connected to the antenna; The WiFi control module includes a baseband processing unit for digital-to-analog conversion; the baseband processing unit is provided with a control register for controlling the output of the baseband modulation signal; The baseband processing unit is connected to the antenna to receive the regional attribute data frame received by the antenna, and outputs a modification instruction to the control register based on the regional attribute data frame to modify the value of the control register; The wireless adapter further comprises an access authentication module for acquiring control data from a WiFi network, and an encryption module for parsing real control data according to the control data; a first end of the access authentication module is connected to the antenna through the interface module to receive control data from the WiFi network; a second end of the access authentication module is connected to the AP module to send the control data to the AP module; the encryption module is connected to the AP module to interact with the AP module; The image acquisition device accesses the WiFi network through the wireless adapter to transmit the image data to the console.

2. The mobile video monitoring device used in the nuclear power field according to claim 1, characterized in that: The image acquisition device includes a camera.

3. The mobile video monitoring device used in the nuclear power field according to claim 1, characterized in that: The AP module also includes a radio frequency amplification module for signal amplification processing; two ends of the radio frequency amplification module are respectively connected to the WiFi control module and the antenna.

4. The mobile video monitoring device used in the nuclear power field according to claim 1, characterized in that: The WiFi control module includes a 2.4G WiFi chip and / or a 5G WiFi chip.

5. The mobile video monitoring device used in the nuclear power field according to claim 4, characterized in that: The 2.4G WiFi chip uses a WiFi chip model QCA9531.

6. The mobile video monitoring device used in the nuclear power field according to claim 4, characterized in that: The 5G WiFi chip uses a WiFi chip model QCA9887.

7. The mobile video monitoring device used in the nuclear power field according to claim 1, characterized in that: The power module includes a transformer unit, a TVS protection unit, a first battery management unit, and a second battery management unit; The first end of the transformer unit is connected to the input power supply, the second end of the transformer unit is connected to the first end of the TVS protection unit, the second end of the TVS protection unit is connected to the first end of the first battery management unit, the second end of the first battery management unit is connected to the first end of the AP module in one way, the second end of the first battery management unit is connected to the first end of the second battery management unit in another way, and the second end of the second battery management unit is respectively connected to the second end of the AP module and the access authentication module.

8. The mobile video monitoring device used in the nuclear power field according to claim 1, characterized in that: The real control data includes authentication information for the WiFi control module to access the WiFi network; the authentication information includes an SSID name and an SSID password.

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