CN219459294U

CN219459294U - Multi-terminal Bluetooth transmission equipment

Info

Publication number: CN219459294U
Application number: CN202223132991.8U
Authority: CN
Inventors: 方逸洲; 赵中瑞; 张鹏程; 张青野; 马之远
Original assignee: Inesa R&d Center
Current assignee: Inesa R&d Center
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-08-01
Anticipated expiration: 2032-11-24

Abstract

The utility model relates to a multi-terminal Bluetooth transmission device, which comprises a Bluetooth host module and at least one Bluetooth slave module, wherein the Bluetooth host module or any one of the Bluetooth slave modules comprises a Bluetooth chip, an interface circuit, a power circuit and an antenna circuit which are connected with the Bluetooth chip, and sensors of a plurality of terminals are connected with the interface circuits of a plurality of Bluetooth slave modules. Compared with the prior art, the utility model can be conveniently arranged, the quantity and the position of the Bluetooth slave modules can be flexibly adjusted, and meanwhile, the power amplifying circuit is arranged on the Bluetooth host module, so that the coverage area is effectively increased.

Description

Multi-terminal Bluetooth transmission equipment

Technical Field

The utility model relates to the field of Internet of things, in particular to multi-terminal Bluetooth transmission equipment.

Background

Bluetooth technology is widely used, including mice, headphones, wearable products, medical products, and the like. Limited to the technical limitation of bluetooth connection transmission, the application scenario is mostly point-to-point transmission, i.e. a bluetooth terminal (e.g. earphone, bracelet, mouse) communicates with a bluetooth host (e.g. mobile phone, computer). Even in the scenario that the host is connected with a plurality of Bluetooth terminals for transmission, the number of the Bluetooth terminals is small.

In the field of industrial manufacturing, the number of equipment terminals is large, the real-time performance of data uploading is high, and the concurrency of data transmission is high. In the existing industrial manufacturing scenes, cables are mostly used for data transmission, but the cables occupy large space, meanwhile, the number of terminal equipment is limited, and the requirements of multiple terminals and multiple sensors in the industrial manufacturing scenes are difficult to meet.

In summary, there is currently a lack of a multi-terminal bluetooth transmission device capable of rapidly acquiring sensor data of a plurality of terminals in an application scenario of industrial manufacturing.

Disclosure of Invention

The present utility model has for its object to overcome the above-mentioned drawbacks of the prior art by providing a method.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a multi-terminal Bluetooth transmission device, which comprises a Bluetooth host module and at least one Bluetooth slave module, wherein the Bluetooth host module or any one of the Bluetooth slave modules comprises a Bluetooth chip, an interface circuit, a power supply circuit and an antenna circuit which are connected with the Bluetooth chip, and sensors of a plurality of terminals are connected with the interface circuits of a plurality of Bluetooth slave modules.

As a preferable technical scheme, for the Bluetooth host module or any one of the Bluetooth slave modules, the Bluetooth slave module further comprises at least one crystal oscillator circuit connected with the Bluetooth chip.

As a preferable technical scheme, the crystal oscillator circuit comprises a plurality of crystal oscillator circuits, and the frequency of the crystal oscillator circuits is 16MHz or 32.768KHz.

As a preferable technical scheme, the interface circuit comprises one or more of a single bus, a TTL serial port, an I2C interface, an SPI interface, a digital-to-analog conversion, an I2S interface, an IR infrared interface and a USB interface.

As a preferable technical scheme, the bluetooth host module or any one of the bluetooth slave modules further comprises a power supply filtering decoupling circuit.

As a preferable technical scheme, for the bluetooth host module or any one of the bluetooth slave modules, the bluetooth host module further comprises a network matching circuit, and the antenna circuit is connected with the bluetooth chip through the network matching circuit.

As an preferable technical scheme, the bluetooth host module further comprises a power amplifying circuit, and the network matching circuit is connected with the bluetooth chip through the power amplifying circuit.

As an optimal technical scheme, the network matching circuit is a pi-shaped network matching circuit.

As a preferable technical scheme, the output of the power supply circuit is direct current.

As an optimal technical scheme, the Bluetooth chip is a Bluetooth low-power consumption chip.

Compared with the prior art, the utility model has the following advantages:

(1) The arrangement of the monitoring equipment is greatly facilitated, and as the cable is not required to be arranged, only the Bluetooth slave modules are required to be arranged at all terminals, the interface circuits of the Bluetooth slave modules are connected with the sensors of the terminals, signals of the sensors are sent out through the antenna circuits of the Bluetooth slave modules, and the Bluetooth host modules receive the signals of all the slave modules according to a preset sequence, so that the data acquisition and monitoring of multiple terminals can be completed.

(2) The Bluetooth slave module and the Bluetooth host module are provided with rich interfaces, are suitable for the characteristics of various types of industrial field devices and different interfaces, have strong application scene adaptability, support various sensors and have strong adaptability.

(3) The Bluetooth host module is added with a power amplifying circuit, so that the ground coverage of the Bluetooth host is effectively increased.

Drawings

Fig. 1 is a schematic diagram of a multi-terminal bluetooth transmission device in embodiment 1;

fig. 2 is a hardware schematic diagram of a bluetooth slave module in embodiment 1;

fig. 3 is a hardware schematic diagram of a bluetooth host module in embodiment 1.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Example 1

As shown in fig. 1, the present embodiment provides a multi-terminal bluetooth transmission device, which includes a bluetooth host module and 15 bluetooth slave modules. The Bluetooth slave module is arranged on the industrial manufacturing terminal and is directly connected with the sensors of the industrial manufacturing terminal, and each sensor corresponds to one Bluetooth slave module.

A hardware schematic of the bluetooth slave module is shown in fig. 2. The Bluetooth slave module comprises a Bluetooth chip, an interface circuit connected with the Bluetooth chip, a DCDC internal power supply circuit, a power filtering decoupling circuit, a crystal oscillator circuit and a network matching circuit. The network matching circuit is connected with the antenna circuit. The interface circuit comprises a single bus, a TTL serial port, an I2C interface, an SPI interface, digital-to-analog conversion, an I2S interface, an IR infrared interface and a USB interface. The sensor is connected with the interface circuit through any one of interfaces. The network matching circuit adopts a pi-shaped network matching circuit. The crystal oscillator circuit comprises a 16MHz crystal oscillator circuit and a 32.768KHz crystal oscillator circuit.

A hardware schematic of the bluetooth host module is shown in fig. 3. Compared with the Bluetooth slave module, the Bluetooth host module is provided with a power amplification circuit between the network matching circuit and the Bluetooth chip for increasing coverage range. The transmitting power of the bluetooth host module of this embodiment reaches 20dBm, which is far greater than the transmitting power of the conventional bluetooth module by about 10 dBm. In addition, in order to save the cost, the interface circuit of the Bluetooth host module only reserves a TTL serial port and a USB interface. The external visual device is connected with the Bluetooth host module through the interface circuit.

The working principle of the multi-terminal bluetooth transmission device in this embodiment is as follows: the Bluetooth chip of the Bluetooth slave module acquires sensing data from a sensor of the industrial field terminal through the interface circuit, and the Bluetooth chip is transmitted to the Bluetooth host module through the network matching circuit and the antenna circuit in sequence. After receiving the Bluetooth signal, the antenna circuit of the Bluetooth host module amplifies the received signal through the network matching circuit and inputs the amplified signal into the Bluetooth chip, the Bluetooth chip decodes the received data and sends the signal converted into a preset format to external visualization equipment through the interface circuit, so that the transmission and monitoring of the terminal signal are completed.

Example 2

Compared with embodiment 1, the difference of this embodiment is that a gating unit is provided on the interface module of the bluetooth slave for selecting the signal input source. After the gating unit is arranged, a plurality of sensors can be connected with the interface module, gating of an input source is realized by manually adjusting the gating unit, and the method is applicable to scenes in which a large number of sensors exist and only part of sensors need to be monitored.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. A multi-terminal Bluetooth transmission device is characterized by comprising a Bluetooth host module and at least one Bluetooth slave module,

the Bluetooth host module or any Bluetooth slave module comprises a Bluetooth chip, an interface circuit, a power circuit and an antenna circuit, wherein the interface circuit, the power circuit and the antenna circuit are connected with the Bluetooth chip, and the sensors of a plurality of terminals are connected with the interface circuits of a plurality of Bluetooth slave modules.

2. The multi-terminal bluetooth transmission device according to claim 1, further comprising at least one crystal oscillator circuit connected to the bluetooth chip for the bluetooth master module or any one of the bluetooth slave modules.

3. A multi-terminal bluetooth transmission device according to claim 2, comprising a plurality of said crystal oscillator circuits, wherein the frequency of the crystal oscillator circuits is 16MHz or 32.768KHz.

4. The multi-terminal bluetooth transmission device according to claim 1, wherein the interface circuit comprises one or more of a single bus, a TTL serial port, an I2C interface, an SPI interface, a digital-to-analog conversion, an I2S interface, an IR infrared interface, and a USB interface.

5. The multi-terminal bluetooth transmission device according to claim 1, further comprising a power filter decoupling circuit for the bluetooth master module or any of the bluetooth slave modules.

6. The multi-terminal bluetooth transmission device according to claim 1, further comprising a network matching circuit for the bluetooth master module or any one of the bluetooth slave modules, wherein the antenna circuit is connected to the bluetooth chip through the network matching circuit.

7. The multi-terminal bluetooth transmission device according to claim 6, wherein the bluetooth host module further comprises a power amplifying circuit, and the network matching circuit is connected to the bluetooth chip through the power amplifying circuit.

8. The multi-terminal bluetooth transmission device according to claim 6, wherein the network matching circuit is a pi-shaped network matching circuit.

9. The multi-terminal bluetooth transmission device according to claim 1, wherein the output of the power supply circuit is direct current.

10. The multi-terminal bluetooth transmission device according to claim 1, wherein the bluetooth chip is a bluetooth low energy chip.