CN216119049U

CN216119049U - Parameter-adjustable multi-channel data acquisition board based on Bluetooth communication

Info

Publication number: CN216119049U
Application number: CN202121948795.0U
Authority: CN
Inventors: 王充; 曹永革; 许德上; 陈玉平
Original assignee: Zero Mirror Shenzhen Technology Co ltd
Current assignee: Zero Mirror Shenzhen Technology Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-03-22
Anticipated expiration: 2031-08-19

Abstract

The utility model provides a parameter-adjustable multi-channel data acquisition board based on Bluetooth communication, which is characterized in that various external sensors are connected into the data acquisition board through a designed pluggable sensor contact port, a plurality of sensor acquisition circuits are used for sequentially connecting a plurality of pieces of externally acquired data into an ADC (analog-to-digital converter) chip with 8 channels and 12-bit width for data processing and conversion, and a Bluetooth 5.0 chip is used for transmitting the multi-channel acquired data to a mobile terminal APP through a Bluetooth wireless technology in real time, so that real-time display and dynamic change of the multi-channel parallel acquired data on the mobile terminal APP are realized. A data acquisition interface of a multi-channel sensor is adopted, so that the rapid acquisition of external data is fully and effectively realized; the Bluetooth 5.0 wireless communication technology is adopted in a combined mode, inconvenience of serial port transmission is solved, and the superiority of the APP at the mobile terminal is improved.

Description

Parameter-adjustable multi-channel data acquisition board based on Bluetooth communication

Technical Field

The utility model relates to the field of data acquisition, in particular to a parameter-adjustable multi-channel data acquisition board based on Bluetooth communication.

Background

In the research of natural laws and social production, information needs to be acquired from the outside, and the acquisition of data information plays an important role in various activities of people. In the process of data acquisition in the past, more complicated computers and serial port wired communication are used, and the portability and the stability of use are limited to a great extent by the modes. Therefore, the mobile terminal APP conforms to the trend of wide portable use of the mobile phone, the problem of non-portability of the computer is effectively solved, and the experience of a user is improved. The utility model realizes parameter-adjustable multi-channel data acquisition by combining a plurality of external sensors with contact ports by depending on a Bluetooth 5.0 communication mode.

SUMMERY OF THE UTILITY MODEL

In view of the above background and the current defects, the utility model provides a parameter-adjustable multi-channel data acquisition board based on bluetooth communication, which comprises a plurality of external sensor connecting contact ports, a charging management unit, an ADC data processing unit, a bluetooth 5.0 communication unit and a status indicator lamp unit; the plurality of external sensor connecting contact ports are electrically connected with the ADC data processing unit; the ADC data processing unit is electrically connected with the Bluetooth 5.0 communication unit; the charging management unit is electrically connected with the Bluetooth 5.0 communication unit; the status indicator lamp unit is electrically connected with the Bluetooth 5.0 communication unit; and the Bluetooth 5.0 communication unit finally uploads the data.

According to the parameter-adjustable multi-channel data acquisition board based on Bluetooth communication, a plurality of external sensors are connected with contact ports for acquisition, an ADC (analog to digital converter) processing unit with 8 channels and 12-bit width is used for processing the data of the external sensors, and the acquired data are transmitted to a mobile terminal APP (application program) in real time by means of a Bluetooth 5.0BLE communication technology.

The sensor is connected with the contact port, is used for the electrical connection between the external sensor and the data acquisition board, and serves as a window for acquiring external state information so as to provide original state information data for the internal processing circuit.

The charging management unit is responsible for charging and discharging management and voltage conversion management functions of the lithium battery; the charging management unit comprises a voltage management chip and a charging management chip which are used for converting 3.7V-4.2V into 3.3V; the 3.7V-4.2V to 3.3V voltage management chip is a TLV755P model low dropout regulator, the input end of the chip is a lithium battery of 3.7V-4.2V, an input filter capacitor is connected in parallel with the ground, and the input filter capacitor is a 10nF capacitor; the output end is 3.3V voltage-stabilized output and is connected with an output filter capacitor in parallel, and the output filter capacitor is a 10nF capacitor; the charging management chip is an HX4054A chip and manages the charging process.

And the ADC data processing unit is used for processing and converting the acquired data of the external sensor. The ADC data processing unit is an ADC analog-to-digital conversion chip with 8 channels and 12 bit width, and adopts an ADI AD7997 ADC chip; the sensor is connected with the contact port, information of the external sensor is transmitted to the ADC data processing unit, and the analog signal of the external sensor is digitized and output to the Bluetooth 5.0 communication unit through the analog-to-digital converter AD 7997.

And the Bluetooth 5.0 communication unit is used as a main control MCU unit of the data acquisition board. It is responsible for coordinating and managing the task processes of other four units; the Bluetooth 5.0 communication unit adopts a Bluetooth NRG-2 model based on Bluetooth 5.0BLE communication technology; the BlueNRG-2 type chip acquires 3.3V stable working voltage by connecting a charging management unit; the programming pins SWDIO and SWCLK are arranged and connected with the charging management unit to realize the programming of the codes; and setting a Bluetooth connection state pin CONNECT _ FLAG, and dynamically displaying the Bluetooth connection state through an LED lamp.

The state indicating unit is used for Bluetooth connection and personalized display of the charging state; the state indicating unit adopts a double-color LED lamp to display the Bluetooth connection state and the power-on/off or charging state; when the Bluetooth is in a Bluetooth connection state, the CONNECT _ FLAG pin is set to be at a low level, so that the LED lamp lights up a green lamp; when in the charging state, VCC _5V is active, so that the LED lamp lights up a yellow lamp.

Drawings

FIG. 1 is a schematic structural view of the present invention;

1. the sensor is connected with the contact port; 2. a charging management unit; an ADC data processing unit; 4. a Bluetooth 5.0 communication unit; 5. a status indicator light unit;

fig. 2 is a circuit diagram of the present invention.

Detailed Description

In order to make the technical means, the creation characteristics and the purpose of the utility model easy to understand, the utility model is further explained below with the specific drawings. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the case of the example 1, the following examples are given,

as shown in fig. 1, the present invention provides a parameter-adjustable multi-channel data acquisition board based on bluetooth communication, including: the device comprises a plurality of external sensors, a contact port (1), a charging management unit (2), an ADC data processing unit (3), a Bluetooth 5.0 communication unit (4) and a status indicator lamp unit (5). The external sensor connecting contact ports (1) are electrically connected with the ADC data processing unit (3); the ADC data processing unit (3) is electrically connected with the Bluetooth 5.0 communication unit (4); the charging management unit (2) is electrically connected with the Bluetooth 5.0 communication unit (4); the status indicator lamp unit (5) is electrically connected with the Bluetooth 5.0 communication unit (4); and the Bluetooth 5.0 communication unit (4) finally uploads the data.

In the case of the example 2, the following examples are given,

as shown in fig. 2, the sensor connection contact port is used for electrical connection between an external sensor and the data acquisition board; connect the contact opening through the sensor, data acquisition board can be connected to the external sensor to but utilize data acquisition board to realize data acquisition data processing to the external sensor, and upload data to mobile client APP.

The charging management unit comprises a voltage management chip and a charging management chip which are used for converting 3.7V-4.2V into 3.3V; the voltage management chip for converting 3.7V-4.2V into 3.3V is a TLV755P chip, the input end of the chip is a lithium battery 3.7V-4.2V, an input filter capacitor is connected in parallel with the ground, and the input filter capacitor is a 10nF capacitor; the output end is 3.3V voltage-stabilized output and is connected with an output filter capacitor in parallel, and the output filter capacitor is a 10nF capacitor.

The ADC data processing unit is an ADC analog-to-digital conversion chip with 8 channels and 12-bit width, adopts an ADI AD7997 ADC chip, and transmits the processed acquired data to the next unit through I2C communication; in order to buffer ADC input signals, an AD8599 operational amplifier with high-precision design is added to each path of analog signal input, the analog input is used as a non-inverting input end of AD8599, an inverting input end is connected with an output end, and the AD8599 supplies power to a voltage of +/-5V; the reference voltage of the AD7997 is obtained by the band-gap reference voltage source AD780, so that the high-precision reference voltage is obtained, and the AD7997 performance is exerted to the maximum. The AD780 outputs 2.5V reference voltage, and the reference voltage is connected with a 0.1uF and 1uF filter capacitor in series. The AD7997 adopts a supply voltage of 3.3V as VDD, and supply voltage filter capacitors of 10uF and 0.1uF are added. SDA, SCL, ALERT are all connected to a 3.3V supply voltage through pull-up resistor 4.7K.

The maximum channel number of the ADC data processing unit is 8, and the adjustment can be carried out according to the requirements of users.

The Bluetooth 5.0 communication unit adopts a BlueNRG-2 model, and a charging management unit provides 3.3V working voltage for BlueNRG-2; the codes are burned through connecting and setting burning pins SWDIO and SWCLK; and setting a Bluetooth connection state pin CONNECT _ FLAG, and dynamically displaying the Bluetooth connection state through an LED lamp.

The status indicator lamp unit adopts a double-color LED lamp to display the Bluetooth connection status and the on-off or charging status. When the Bluetooth is in a Bluetooth connection state, the CONNECT _ FLAG pin is set to be at a low level, so that the LED lamp lights up a green lamp; when in the charging state, VCC _5V is active, so that the LED lamp lights up a yellow lamp.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A parameter-adjustable multi-channel data acquisition board based on Bluetooth communication is characterized by comprising a plurality of external sensor connecting contact ports, a charging management unit, an ADC (analog to digital converter) data processing unit, a Bluetooth 5.0 communication unit and a state indicator lamp unit; the plurality of external sensor connecting contact ports are electrically connected with the ADC data processing unit; the ADC data processing unit is electrically connected with the Bluetooth 5.0 communication unit; the charging management unit is electrically connected with the Bluetooth 5.0 communication unit; the status indicator lamp unit is electrically connected with the Bluetooth 5.0 communication unit; and the Bluetooth 5.0 communication unit finally uploads the data.

2. The parameter-adjustable multi-channel data acquisition board based on Bluetooth communication of claim 1, wherein the charging management unit comprises a voltage management chip and a charging management chip which are used for converting 3.7V-4.2V into 3.3V;

the voltage management chip for converting 3.7V-4.2V into 3.3V is a TLV755P model low dropout regulator, and is connected with a filter capacitor in parallel; the charging management chip is an HX4054A chip.

3. The parameter-adjustable multi-channel data acquisition board based on Bluetooth communication as claimed in claim 1, wherein the ADC data processing unit is an ADC analog-to-digital conversion chip with 8 channels and 12 bit width, and adopts an ADC chip with AD7997 model of ADI;

the analog-to-digital conversion chip AD7997 realizes the digital processing of the analog signal of the external sensor and outputs the digital signal to the Bluetooth 5.0 communication unit.

4. The parameter-adjustable multi-channel data acquisition board based on bluetooth communication according to claim 1, wherein the bluetooth 5.0 communication unit adopts a bluetooth 5.0BLE communication technology-based bluetooth nrg-2 model, and is connected to a 3.3V operating voltage pin of the charging management unit.

5. The parameter-adjustable multi-channel data acquisition board based on Bluetooth communication as claimed in claim 1, wherein the status indicator light unit is a bi-color LED light.