Smart window and controller thereof, power detection method and storage medium

Patent metadata

Field	Value
Publication number	US-12034293-B2
Application number	US-202017274855-A
Country	US
Kind code	B2
Filing date	Jun 5, 2020
Priority date	Jun 5, 2020
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

A smart window and a controller thereof, a power detection method and a non-transitory computer-readable storage medium are provided. The controller includes: a microcontroller; an output circuit coupled to the microcontroller and configured to output a driving signal under a control of the microcontroller; a first power supply coupled to a load through the output circuit and configured to supply an operating power supply to the load; a sampling resistor between the output circuit and the first power supply, a first terminal of the sampling resistor being coupled to the first power supply, and the second terminal of the sampling resistor being coupled to the output circuit; and a power acquiring circuit coupled to the microcontroller and coupled to the first terminal and the second terminal of the sampling resistor, respectively.

First claim

What is claimed is:

1. A smart window controller, comprising:
a microcontroller;
an output circuit coupled to the microcontroller and configured to output a driving signal under a control of the microcontroller;
a first power supply coupled to a load through the output circuit and configured to supply an operating power supply to the load;
a sampling resistor between the output circuit and the first power supply, a first terminal of the sampling resistor being coupled to the first power supply, and the second terminal of the sampling resistor being coupled to the output circuit; and
a power acquiring circuit coupled to the microcontroller and respectively coupled to the first terminal and the second terminal of the sampling resistor, so as to acquire a voltage across the first terminal and the second terminal of the sampling resistor and send the voltage to the microcontroller based on a power detection instruction sent by the microcontroller, and further to acquire a load current value and a load power value;
wherein the power acquiring circuit comprises:
a channel interface coupled to the first terminal and the second terminal of the sampling resistor, respectively; and
a sampling path coupled to the channel interface and the microcontroller to transfer a sampling signal of the sampling resistor to the microcontroller; and
wherein the channel interface comprises:
a first interface coupled to the first terminal of the sampling resistor and configured to receive a first sampling signal;
a second interface coupled to the second terminal of the sampling resistor and configured to receive a second sampling signal; and
a multiplexer coupled to the first interface and the second interface, and configured to select, based on the power detection instruction, one of the first sampling signal and the second sampling signal to be transferred to the sampling path.

2. The smart window controller of claim 1 , wherein the power acquiring circuit further comprises a channel selector, and
the channel selector is coupled to the multiplexer and the microcontroller, and is configured to generate a multiplex selection signal according to the power detection instruction to control one of the first interface and the second interface to be coupled to the sampling path.

3. The smart window controller of claim 2 , wherein the sampling path comprises:
an amplifier coupled to the multiplexer and configured to amplify the received first sampling signal and the received second sampling signal;
a signal adjustment circuit coupled to the amplifier and configured to adjust the amplified first sampling signal and the amplified second sampling signal to a desired level; and
an analog-to-digital conversion circuit coupled to the signal adjustment circuit and configured to convert analog signals of the first sampling signal and the analog second sampling signals into digital signals.

4. The smart window controller of claim 3 , wherein the sampling path further comprises a protocol conversion circuit coupled to the analog-to-digital conversion circuit, the channel selector, and the microcontroller, to perform a protocol conversion on communication data between the analog-to-digital conversion circuit and the microcontroller and communication data between the channel selector and the microcontroller.

5. The smart window controller of claim 4 , further comprising a filter circuit coupled to the first terminal and the second terminal of the sampling resistor, the first interface and the second interface, respectively, to filter the first sampling signal and the second sampling signal and output the filtered first sampling signal and the filtered second sampling signal to the first interface and the second interface, respectively.

6. The smart window controller of claim 5 , wherein the microcontroller is configured to:
generate the power detection instruction and send the power detection instruction to the power acquiring circuit automatically;
calculate the load power value according to the first sampling signal and the second sampling signal;
compare the load power value with a preset power value; and
determine whether a load circuit has a fault or not according to a comparison result between the load power value and the preset power value.

7. The smart window controller of claim 6 , further comprising a data memory coupled to the microcontroller to store the first sampling signal, the second sampling signal, the preset power value, a load voltage value, the load current value, and the load power value.

8. The smart window controller of claim 1 , wherein the output circuit is an H-bridge output circuit, and
the smart window controller further comprises a voltage conversion circuit coupled between the first power supply and the first terminal of the sampling resistor.

9. The smart window controller of claim 8 , wherein the H-bridge output circuit comprises a first transistor, a second transistor, a third transistor, and a fourth transistor;
a gate of the first transistor is coupled to the microcontroller, a first electrode of the first transistor is coupled to the second terminal of the sampling resistor, and a second electrode of the first transistor is coupled to a first voltage output terminal;
a gate of the second transistor is coupled to the microcontroller, a first electrode of the second transistor is coupled to the second terminal of the sampling resistor, and a second electrode of the second transistor is coupled to a second voltage output terminal;
a gate of the third transistor is coupled to the microcontroller, a first electrode of the third transistor is coupled to the first voltage terminal, and a second electrode of the third transistor is coupled to the first voltage output terminal; and
a gate of the fourth transistor is coupled to the microcontroller, a first electrode of the fourth transistor is coupled to the first voltage terminal, and a second electrode of the fourth transistor is coupled to the second voltage output terminal.

10. The smart window controller of claim 1 , wherein the output circuit comprises an operational amplifier circuit;
the smart window controller further comprises a voltage conversion circuit and a digital-to-analog conversion circuit or comprises a voltage conversion circuit and a signal generation circuit; and
the voltage conversion circuit is between the second terminal of the sampling resistor and the operational amplifier circuit, and the digital-to-analog conversion circuit or the signal generation circuit is between the output circuit and the microcontroller.

11. A smart window, comprising the smart window controller of claim 1 and a load circuit.

12. A method for detecting a power by the smart window controller of claim 1 , comprising:
sending, by the microcontroller, the power detection instruction to the power acquiring circuit automatically;
sampling, by the power acquiring circuit, the voltage across the first terminal and the second terminal of the sampling resistor coupled to the first power supply and the output circuit according to the power detection instruction;
sending, by the power acquiring circuit, the sampling signal to the microcontroller; and
detecting, by the microcontroller, a load power according to the sampling signal.

13. The method of claim 12 , wherein the sampling the voltage across the first terminal and the second terminal of the sampling resistor further comprises:
sampling a signal at the first terminal of the sampling resistor coupled to the first power supply to obtain a first sampling signal; and
sampling a signal at the second terminal of the sampling resistor coupled to

Assignees

• Beijing Boe Sensor Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Wang Yongbo
• Meng Chen
• Hu Dahai
• Xu Siheng
• Zhong Wenjie
• Liu Binbin

Classifications

• H02H1/0007

  concerning the detecting means (in general G01R or other subclasses of G01; reed switches H01H71/2445) · CPC title

• G01R21/06

  by measuring current and voltage (G01R21/08 - G01R21/133 take precedence) · CPC title

• H02H3/42

  responsive to product of voltage and current · CPC title

• G05B19/04

  Program control other than numerical control, i.e. in sequence controllers or logic controllers (G05B19/418 takes precedence) · CPC title

• E05F15/40

  Safety devices, e.g. detection of obstructions or end positions · CPC title