CN108259075A - A kind of relay apparatus - Google Patents

Abstract

The application provides a wireless relay device, including an MCU, a Wi-Fi unit and an FM signal transmitting unit, the Wi-Fi unit and the FM signal transmitting unit are electrically connected to the MCU; when the MCU passes the Wi-Fi When the unit receives the voice data sent by the monitoring terminal on the water, the audio data is sent to the underwater terminal equipment through the FM signal transmitting unit; wherein, the monitoring terminal on the water establishes a wireless connection with the device through the Wi-Fi unit. Through the above means, the present application enables the underwater terminal equipment to receive the FM signal and convert it into sound playback only by installing a tuner and coil antenna with small size, light weight, and low power consumption, which meets the needs of short-distance underwater wearable terminal equipment and The demand for real-time communication of the monitoring terminal on the water.

Description

A wireless relay device

technical field

The present application relates to the technical field of communications, and in particular, to a wireless relay device.

Background technique

Existing underwater communication mainly includes communication methods such as sound, light, and electromagnetic waves. Each communication method has its own characteristics and application range, and each has its own advantages and disadvantages: Among the various waves propagating in water, the attenuation of sound waves is the smallest, but the transmission delay is long , low transmission rate, high power consumption and large size, and is easily affected by interference factors, so it is not suitable for real-time interactive communication between swimmers and coaches. The principle of laser communication is to use a laser with a wavelength between blue light and green light to transmit information in water. Transmitting and receiving alignment), the deviation angle cannot be too large, the communication distance is limited (hundreds of meters), and the power consumption is also large, so it is difficult to use for communication between swimmers and coaches. For electromagnetic wave communication, since electromagnetic waves are transverse waves and water is a good conductor, the skin effect will seriously affect the transmission of electromagnetic waves in water. Therefore, radio waves widely used on land can hardly be used underwater; The penetration depth in the conductor is directly related to its wavelength. The short-wave penetration depth is small, while the long-wave penetration depth is larger. Therefore, for a long time, ultra-high-power long-wave (generally using the very low frequency band of 3~30kHz) communication has become a The main form of underwater communication, but the size and weight of ultra-high-power long-wave communication equipment are not suitable for swimmers to carry during training.

Contents of the invention

The present application provides a wireless relay device, which is used to solve the problem that the existing communication technology cannot be applied to real-time communication between underwater wearable devices and water monitoring terminals.

A wireless relay device disclosed in the present application includes an MCU, a Wi-Fi unit, and an FM signal transmitting unit, and the Wi-Fi unit and the FM signal transmitting unit are electrically connected to the MCU; when the MCU passes the Wi-Fi When the unit receives the voice data from the water monitoring terminal, it sends the audio data to the underwater terminal equipment through the FM signal transmitting unit; wherein, the water monitoring terminal establishes a wireless connection with the device through the Wi-Fi unit.

Preferably, the device also includes a radio frequency transceiver unit electrically connected to the MCU; the underwater terminal equipment establishes a wireless connection with the device through the radio frequency transceiver unit; the MCU receives the water monitoring terminal through the Wi-Fi unit When the data collection instruction is received, the data collection instruction is sent to the underwater terminal device through the radio frequency transceiver unit; when the MCU receives the data collected by the underwater terminal device according to the data collection instruction through the radio frequency transceiver unit, the data is sent to The Wi-Fi unit sends to the monitoring terminal on the water.

Preferably, the FM signal transmitting unit includes an FM transmitting integrated circuit integrated on a printed circuit board and a high-gain FM transmitting antenna; the high-gain FM transmitting antenna is installed and fixed on the top of the device casing.

Preferably, the radio frequency transceiver unit includes a radio frequency integrated circuit and a radio frequency antenna integrated on a printed circuit board; the radio frequency antenna is installed and fixed on the top of the wireless relay device housing.

Preferably, the radio frequency band for communication between the FM signal transmitting unit and the underwater terminal equipment is specifically 76MHz~108MHz.

Preferably, a time division multiple access transmission mode is adopted between the radio frequency transceiver unit and the underwater terminal equipment.

Preferably, the radio frequency for communication between the radio frequency transceiver unit and the underwater terminal equipment is specifically 433MHz.

Preferably, the data collected by the underwater terminal device according to the data collection instruction includes the heart rate and/or blood oxygen index of the underwater staff.

Preferably, the device accesses the Internet through a wireless access point, and is connected to the cloud service platform through the Internet; when the MCU receives the data collected by the underwater terminal equipment according to the data collection instruction through the radio frequency transceiver unit, it also The above data is uploaded to the cloud service platform through the Internet; the cloud service platform analyzes the data and generates a WEB presentation page for the monitoring terminal on the water.

Preferably, the serial peripheral interface protocol is used to transmit data between the MCU and the Wi-Fi unit; the serial peripheral interface protocol is used to transmit data between the MCU and the radio frequency transceiver unit; the MCU transmits data to the FM signal transmitting unit Two-wire serial bus protocol or integrated circuit built-in audio bus protocol is used when sending audio data.

Compared with the prior art, the present application has the following advantages:

The embodiment of the device in this application combines the characteristics of above-water and underwater radio communication, adopts the Wi-Fi method to establish a wireless connection with the above-water monitoring terminal and receives the audio data sent by the above-water monitoring terminal, and adopts FM (Frequency Modulation) signal transmission method to the short-distance (The underwater transmission distance does not exceed 100m) underwater terminal equipment transmits voice data, so that the underwater terminal equipment only needs to install a tuner and coil antenna that is small in size, light in weight, and low in power consumption to receive FM signals and convert them into Sound playback meets the real-time communication requirements between underwater wearable terminal devices and water monitoring terminals.

Description of drawings

The drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the application. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

FIG. 1 is a schematic structural diagram of a wireless relay device according to the first embodiment of the present application;

FIG. 2 is a schematic structural diagram of a wireless relay device according to a second embodiment of the present application.

Detailed ways

In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

In the description of the present application, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. "Plurality" means two or more, unless otherwise clearly and specifically defined. The terms "including", "comprising" and similar terms should be understood as open-ended terms, ie "including/comprising but not limited to". The term "based on" is "based at least in part on". The term "an embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one further embodiment". Relevant definitions of other terms will be given in the description below.

Referring to Fig. 1, it shows the structure of a wireless relay device according to the first embodiment of the present application, including MCU (MicroController Unit, micro processing unit) 10, Wi-Fi unit 11 and FM signal transmitting unit 12, Wi-Fi unit 11 and FM signal transmitting unit 12 are electrically connected with MCU10 respectively;

When the MCU10 receives the voice data sent by the monitoring terminal on the water through the Wi-Fi unit 11, the audio data is sent to the underwater terminal equipment through the FM signal transmitting unit 12;

Wherein, the above-water monitoring terminal establishes a wireless connection with the device through the Wi-Fi unit 11 .

In another embodiment, in order to further improve the data transmission effect, the above-mentioned FM signal transmitting unit 12 may specifically include an FM transmitting integrated circuit integrated on a printed circuit board (PCB, Printed Circuit Board) and a high-gain FM transmitting antenna (HGA, High Gain Antenna); although the HGA is relatively narrower in the radiation direction, the radiation in some directions is more concentrated, and the wireless repeater can be placed towards the swimming pool to achieve signal gain in these directions. For the convenience of equipment deployment, the above-mentioned high-gain FM transmitting antenna can be installed and fixed on the top of the device casing.

In a further preferred embodiment, in order to further reduce the power consumption of the underwater terminal equipment and facilitate the networking of multiple underwater terminal equipment with the wireless relay device of the present application, the FM signal transmitting unit 12 and the underwater terminal equipment can specifically be Choose the following radio frequency bands with low power consumption, frequency coverage of FM bands in various countries, support for flexible channel spacing modes, automatic frequency control and automatic gain control, digital adaptive noise suppression, analog and digital volume control, etc.: 76MHz~108MHz.

With reference to Fig. 2, have shown the structure of a kind of wireless repeater device of the second embodiment of the present application, and the difference with above-mentioned first embodiment is, described device also comprises the radio frequency transceiving unit 13 that is electrically connected with MCU10, underwater terminal The device can establish a wireless connection with the wireless relay device of the present application through the radio frequency transceiver unit 13; wherein, when the MCU 10 receives a data collection instruction from the monitoring terminal on the water through the Wi-Fi unit 11 (such as collecting the heart rate of the underwater staff and/or blood oxygen index), the data collection instruction is sent to the underwater terminal device through the radio frequency transceiver unit 13; when the MCU10 receives the data collected by the underwater terminal device according to the data collection instruction through the radio frequency transceiver unit 13, the The above data is sent to the monitoring terminal on the water through the Wi-Fi unit 11.

During specific implementation, the radio frequency transceiver unit 13 may specifically include a radio frequency integrated circuit and a radio frequency antenna integrated on the PCB; for the convenience of device deployment, the above radio frequency antenna may be installed and fixed on the top of the wireless relay device housing.

Regarding the data transmission protocol between the units, the serial peripheral interface (SPI, Serial Peripheral Interface) protocol can be used to transmit data between the MCU 10 and the Wi-Fi unit 11; the SPI protocol can also be used to transmit data between the MCU 10 and the radio frequency transceiver unit 13 Data: MCU 10 can use two-wire serial bus (I2C, Inter-Integrated Circuit) protocol or integrated circuit built-in audio bus (I2S, Inter-IC Sound) protocol when sending audio data to FM signal transmitting unit 12 .

In another embodiment, in order to further improve the reliability of data transmission, the radio frequency for communication between the radio frequency transceiver unit 13 and the underwater terminal equipment may specifically select the wireless public frequency 433MHz located in the sub-GHz frequency band.

In a further preferred embodiment, the device can also access the Internet through a wireless access point (AP, AccessPoint), and connect to the cloud service platform through the Internet; at this time, when the MCU10 receives the underwater When the terminal device collects data according to the data collection instruction, it also uploads the data to the cloud service platform through the Internet; the cloud service platform analyzes the data and generates a WEB display page for the monitoring terminal on the water. Demonstrate service.

In addition, in order to ensure the stability of many-to-one (that is, multiple underwater terminal equipment to one wireless relay device) communication, time division multiple access (TDMA, Time Division Multiple Access) can be used between the underwater terminal equipment and the radio frequency transceiver unit 13 Transmission mode, divide time into non-overlapping periods (frames), and then divide frames into non-overlapping time slots (channels) to establish a one-to-one correspondence with corresponding users, so that users from different addresses can be distinguished according to time slots Signals complete multi-access connections, ensuring that the collected information can be reliably and effectively transmitted to the water interface terminal and cloud service platform in a short period of time.

It should be noted that the above embodiments are preferred embodiments, and the units and modules involved are not necessarily required by this application. Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above is a detailed introduction of a wireless relay device provided by this application. In this article, specific examples are used to illustrate the principle and implementation of this application. The description of the above embodiment is only used to help understand the method of this application. and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation and application scope. limits.

Claims (10)

1. a kind of relay apparatus, which is characterized in that including MCU, Wi-Fi unit and FM signal transmitter units, the Wi-Fi Unit and FM signal transmitter units are electrically connected respectively with the MCU；

When the MCU receives by Wi-Fi units the voice data that monitor terminal waterborne is sent out, it is single to pass through the transmitting of FM signals The audio data is sent to submarine terminal equipment by member；

Wherein, the monitor terminal waterborne establishes wireless connection by Wi-Fi units and described device.

2. a kind of relay apparatus according to claim 1, which is characterized in that described device is further included to be electrically connected with MCU The Transmit Receive Unit connect；

The submarine terminal equipment establishes wireless connection by Transmit Receive Unit and described device；

When the MCU receives the data acquisition instructions that monitor terminal waterborne is sent out by Wi-Fi units, data acquisition is referred to It enables and submarine terminal equipment is sent to by Transmit Receive Unit；

When the MCU receives by Transmit Receive Unit the data that submarine terminal equipment is acquired according to data acquisition instructions, The data are sent to monitor terminal waterborne by Wi-Fi units.

3. a kind of relay apparatus according to claim 1, which is characterized in that the FM signal transmitter units include collection Into FM transmitting integrated circuits on a printed circuit and high-gain FM transmitting antennas；The high-gain FM transmitting antennas installation is solid It is scheduled on the top of crust of the device.

4. a kind of relay apparatus according to claim 2, which is characterized in that the Transmit Receive Unit includes integrated RF IC and radio-frequency antenna on a printed circuit；The radio-frequency antenna is fixed on relay apparatus shell Top.

5. a kind of relay apparatus according to claim 1, which is characterized in that the FM signal transmitter units with it is underwater The radio frequency band to communicate between terminal device is specially 76MHz ~ 108MHz.

6. a kind of relay apparatus according to claim 2, which is characterized in that the Transmit Receive Unit and underwater end Time division multiple acess transmission mode is used between end equipment.

7. a kind of relay apparatus according to claim 2, which is characterized in that the Transmit Receive Unit and underwater end The radio frequency to communicate between end equipment is specially 433MHz.

8. a kind of relay apparatus according to claim 2, which is characterized in that the submarine terminal equipment is according to data The data of acquisition instructions acquisition include the heart rate of underwater operation personnel and/or blood oxygen index.

9. a kind of relay apparatus according to claim 2, which is characterized in that described device is connect by wireless access point Enter internet, and pass through internet and connect with cloud service platform；

When the MCU receives by Transmit Receive Unit the data that submarine terminal equipment is acquired according to data acquisition instructions, The data are also uploaded to cloud service platform by internet；The data are analyzed and will be divided by the cloud service platform Analysis result generation WEB shows the page, and providing WEB for monitor terminal waterborne shows service.

10. a kind of relay apparatus according to claim 2, which is characterized in that

Data are transmitted using serial peripheral interface protocol between MCU the and Wi-Fi units；

Data are transmitted using serial peripheral interface protocol between the MCU and Transmit Receive Unit；

The MCU uses sound built in two-wire serial bus protocol or integrated circuit when sending audio data to FM signal transmitter units Frequency bus protocol.