CN218059579U

CN218059579U - Vibration detection module of washing machine

Info

Publication number: CN218059579U
Application number: CN202220819015.0U
Authority: CN
Inventors: 江阔善; 李云孝; 刘乾文
Original assignee: Xiamen High Power Electronics Co ltd
Current assignee: Xiamen High Power Electronics Co ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-12-16
Anticipated expiration: 2032-04-11

Abstract

The utility model discloses a washing machine's vibration detection module, including a triaxial acceleration sensor and a microcontroller, triaxial acceleration sensor with the microcontroller electricity is connected, vibration detection module is connected through three wires and washing machine's master control circuit board, and wherein, first wire and second wire are power cord and ground wire respectively, are used for master control circuit board gives the power supply of vibration detection module provides first voltage, and the third wire is used for vibration detection module with master control circuit board communication. The vibration control module of the washing machine is connected with the main control circuit board only by three wires including a power supply, a ground and a data wire, and the vibration control module autonomously sends vibration detection data to the main control circuit board, so that the chip resources occupying the main control circuit board can be reduced, and the system complexity of the washing machine is reduced.

Description

Vibration detection module of washing machine

Technical Field

The utility model relates to a washing machine control field especially relates to a washing machine's vibration detection module.

Background

The invention patent with application number 202011096328.X discloses a method for measuring the rotating speed of a washing machine with an MEMS sensor and a method for detecting displacement data, wherein a vibration detection module in the washing machine with the MEMS sensor is utilized to obtain rotating speed data through triaxial acceleration data, and through filtering of the triaxial rotating speed data, the interference influence in the working process is reduced, so that more stable and accurate rotating speed data of the washing machine is obtained. The washing machine rotation speed data can provide more accurate rotation speed reference for washing machine vibration detection, and is used for setting different IIR filter parameters and gains of a vibration detection module of the washing machine. And because the washing machine does not need to provide a rotating speed signal outside, the upper computer does not need to transmit the real-time rotating speed, the data transmission with the upper computer is reduced, the occupied chip resource of the upper computer is reduced, and the system complexity of the washing machine is reduced.

Because the communication related to the method is one-way communication, the vibration detection module of the corresponding washing machine can be further optimized to save the cost.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above object, the utility model provides a washing machine's vibration detection module, including a triaxial acceleration sensor and a microcontroller, triaxial acceleration sensor with the microcontroller electricity is connected, vibration detection module connects through three wires and washing machine's master control circuit board, and wherein, first wire and second wire are power cord and ground wire respectively, are used for master control circuit board gives the power supply of vibration detection module provides first voltage, and the third wire is used for microcontroller with master control circuit board communication.

Furthermore, the vibration detection module further comprises a power management module, and the power management module is used for adjusting the first voltage and then supplying power to the microcontroller and the triaxial acceleration sensor.

Further, the first voltage is 5V, and the working voltage of the microcontroller is 3.3V or lower.

Furthermore, the vibration detection module further comprises a level conversion circuit, and the level conversion circuit is used for realizing level conversion of signals between the third conducting wire and the microcontroller.

Further, the level shift circuit comprises a first resistor, a second resistor and an MOS (metal oxide semiconductor) tube, wherein a source electrode of the MOS tube is connected with a general IO (input/output) interface of the microcontroller and is pulled up through the first resistor to the working voltage of the microcontroller, a drain electrode of the MOS tube is connected with a data line and is pulled up to the external power supply voltage through the second resistor, and a grid electrode of the MOS tube is pulled up to the working voltage of the microcontroller.

Further, the electrical connection between the triaxial acceleration sensor and the microcontroller comprises an I2C interface and at least one interrupt interface, and the triaxial acceleration sensor outputs an interrupt signal through the interrupt interface.

Further, the triaxial acceleration sensor has two interrupt output interfaces.

The utility model discloses a following technological effect:

the vibration control module of the washing machine is connected with the main control circuit board only by three wires including a power supply, a ground and a data wire, and the vibration control module autonomously sends vibration detection data to the main control circuit board, so that the chip resources occupying the main control circuit board can be reduced, and the system complexity of the washing machine is reduced.

Drawings

Fig. 1 is a functional block diagram of a preferred embodiment of the present invention;

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

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1 and 2, the present invention discloses a vibration detecting module 10 of a washing machine. The module comprises a triaxial acceleration sensor module 11, a microcontroller module 12 and a power management module 13, the triaxial acceleration sensor module 11 is electrically connected with the microcontroller module 12, the microcontroller module 12 is connected with a main control circuit board 20 of the washing machine through three wires, the three wires are respectively marked as a power line 31, a ground line 32 and a data line 33, the power line 31 and the ground line 32 are used for the main control circuit board 20 to supply power to the vibration detection module 10, signals transmitted by the power line 31 are marked as +5V and VCC _5V, signals transmitted by the data line 33 are marked as USRT _ TX, the data line is used for communication between the vibration detection module 10 and the main control circuit board 20, in the embodiment, the vibration detection module 10 unidirectionally transmits data to the main control circuit board 20, the microcontroller module 12 forwards triaxial acceleration signals collected by the triaxial acceleration sensor module 11 to the main control circuit board 20, and the forwarded triaxial acceleration signals can be processed or unprocessed.

In the microcontroller module 12 in this embodiment, the operating voltage of the microcontroller U1 is +3.3V, and it is configured to use an internal clock, and its input and output interfaces are distributed as follows: the interfaces of the microcontroller U1 and the triaxial acceleration sensor U2 comprise a set of I2C interfaces (I2C _ SDA, I2C _ SCL) and two interrupt interfaces (INT 1, INT 2). The microcontroller U1 writes configuration information of the triaxial acceleration sensor U2 into the triaxial acceleration sensor U2 through an I2C interface so as to set an interrupt trigger condition, and outputs triaxial acceleration data, namely vibration detection data, after the trigger interrupt. In this embodiment, two interrupt interfaces are used, and the microcontroller U1 can execute different interrupt processing programs according to different interrupt signals. For example, the two interrupt handlers can respectively execute the following processing procedures:

(1) When receiving a first interrupt signal sent by a three-axis acceleration sensor U2, a microcontroller U1 receives vibration detection data sent by the three-axis acceleration sensor and forwards the data to a main control circuit board;

(2) And when receiving a second interrupt signal sent by the triaxial acceleration sensor U2, the microcontroller U1 generates and sends alarm information to the main control circuit board.

The three-axis acceleration sensor U2 adopts an interrupt triggering mode, so that the microcontroller U1 can work in a low power consumption mode, and is awakened when data needs to be transmitted to perform data transmission work.

In this embodiment, the data line 33 is connected to the microcontroller U1 through a level shift circuit 14.

In this embodiment, the level shift circuit 14 includes resistors R4 and R5 and a MOS transistor Q1, a source (S pole) of the MOS transistor Q1 is connected to a general IO interface (pin 8) of the microcontroller U1, and is pulled up to +3.3V through the resistor R4; the drain (D pole) of the MOS transistor Q1 is connected to the data line 33 (signal USRT _ TX), and is pulled up to +5V through the resistor R5; the gate of the MOS transistor Q1 is pulled up to +3.3V. In this embodiment, +3.3V is the operating voltage of microcontroller U1, and is also the operating voltage of the general IO interface of microcontroller U1; +5V is the external supply voltage and also the operating voltage of the external data interface.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a washing machine's vibration detection module, includes a triaxial acceleration sensor and a microcontroller, its characterized in that, triaxial acceleration sensor with the microcontroller electricity is connected, vibration detection module is connected through three wires and washing machine's master control circuit board, and wherein, first wire and second wire are power cord and ground wire respectively, are used for master control circuit board gives the vibration detection module power supply provides first voltage, and the third wire is used for microcontroller with master control circuit board communication.

2. The vibration detection module of a washing machine as claimed in claim 1, further comprising a power management module for adjusting the first voltage to supply power to the microcontroller and the three-axis acceleration sensor.

3. The vibration detecting module of a washing machine according to claim 2, wherein the first voltage is 5V, and the operating voltage of the microcontroller is 3.3V or less.

4. The vibration detection module of a washing machine as claimed in claim 1, further comprising a level conversion circuit for performing level conversion of a signal between the third wire and the microcontroller.

5. The vibration detecting module of a washing machine according to claim 4, wherein the level shifter circuit includes a first resistor, a second resistor and a MOS transistor, a source of the MOS transistor is connected to a general IO interface of the microcontroller and is pulled up to the operating voltage of the microcontroller through the first resistor, a drain of the MOS transistor is connected to the data line and is pulled up to the external power supply voltage through the second resistor, and a gate of the MOS transistor is pulled up to the operating voltage of the microcontroller.

6. The vibration detection module of a washing machine according to claim 1, wherein the electrical connection between the three-axis acceleration sensor and the microcontroller comprises an I2C interface and at least one interrupt interface, the three-axis acceleration sensor outputting an interrupt signal through the interrupt interface.

7. The vibration detection module of a washing machine as claimed in claim 6, wherein the three-axis acceleration sensor has two interrupt output interfaces.