Doorbell circuit with low power consumption

Abstract

The utility model discloses a low-power-consumption doorbell circuit, which comprises a main control circuit, an image sensing circuit, an environment photosensitive detection circuit, an optical filter driving circuit, a communication circuit, a Hall anti-disassembly circuit and an external interface circuit used for connecting an external function module, the main control circuit is respectively connected with the image sensing circuit, the environment photosensitive detection circuit, the optical filter driving circuit, the communication circuit, the Hall anti-disassembly circuit and the external interface circuit, and the external interface circuit comprises an SPI (Serial Peripheral Interface), a UART (Universal Asynchronous Receiver / Transmitter) interface, an I2C (Inter-Integrated Circuit) interface, a PWM (Pulse Width Modulation) interface, a GPIO (General Purpose Input / Output) interface and an ADC (Analog to Digital Converter) interface. According to the utility model, the external interface circuit is additionally arranged, so that the expansibility and compatibility of equipment are improved, and a user can add or upgrade the functions of the doorbell according to needs.

Description

Technical Field

[0001] The utility model relates to the technical field of doorbells, in particular to a low-power consumption doorbell circuit. Background Art

[0002] Doorbells originated from the decorative door knockers installed on the doors of wealthy families in ancient times to remind the owner that guests were visiting. With the development of the times and technology, doorbells have changed from simple door knockers and copper bells to modern electronic doorbells. Electronic doorbells are also divided into wired doorbells, wireless doorbells, video doorbells, etc. With the development of society, more and more users will choose to use video doorbell products according to the market consumption level. This doorbell not only supports voice call function, so that the owner can communicate with visitors in real time, but also can display the image of the visitor, providing a more intuitive and safe way of communication. In addition, the video doorbell also has a camera function, which can record the dynamics outside the door, thus playing a role in anti-theft to a certain extent.

[0003] However, existing video doorbells are often closed systems that lack standard external interfaces, making it impossible for users to directly connect external devices or add new functional modules, such as infrared fill light, PIR human body sensing, radar sensing, audio, button, USB, DC5V input functional modules, etc. Due to the lack of scalability, the functions of video doorbells are limited to the factory settings and cannot be customized according to the user's personalized needs. Utility Model Content

[0004] In order to overcome the problem that the doorbell in the prior art lacks scalability and cannot customize functions according to the personalized needs of users, the utility model provides a low-power consumption doorbell circuit.

[0005] The technical solution of the utility model is as follows:

[0006] A low-power doorbell circuit comprises a main control circuit, an image sensor circuit, an ambient light detection circuit, a filter drive circuit, a communication circuit, a Hall anti-tampering circuit and an external interface circuit for connecting an external functional module, wherein the main control circuit is respectively connected to the image sensor circuit, the ambient light detection circuit, the filter drive circuit, the communication circuit, the Hall anti-tampering circuit and the external interface circuit, and the external interface circuit comprises an SPI interface, a UART interface, an I2C interface, a PWM interface, a GPIO interface and an ADC interface.

[0007] As a preferred solution of the utility model, it also includes a battery, a charging management circuit and a DC-DC circuit. The DC-DC circuit is connected to the battery, the charging management circuit and the main control circuit respectively, and the battery is also connected to the charging management circuit.

[0008] As a preferred embodiment of the present utility model, the charging management circuit includes a charging management chip and a charging interface for connecting a charging adapter, and the charging management chip is respectively connected to the charging interface, the battery, and the DC-DC circuit.

[0009] As a preferred embodiment of the present utility model, it further includes a power-on / off circuit, and the power-on / off circuit is connected to the main control circuit.

[0010] As a preferred embodiment of the present utility model, it further includes an RF433 wireless circuit, and the RF433 wireless circuit is connected to the main control circuit.

[0011] As a preferred embodiment of the present utility model, it further includes an audio acquisition circuit and an audio amplification circuit, and both the audio acquisition circuit and the audio amplification circuit are connected to the main control circuit.

[0012] As a preferred embodiment of the present utility model, it further includes a TF card circuit, and the TF card circuit is connected to the main control circuit.

[0013] As a preferred embodiment of the present utility model, it further includes a NOR Flash circuit, and the NOR Flash circuit is connected to the main control circuit.

[0014] As a preferred embodiment of the present utility model, the main control circuit includes an SOC main control chip, and the SOC main control chip is respectively connected to the image sensing circuit, the ambient light photosensitive detection circuit, the filter driver circuit, the communication circuit, the Hall anti-tampering circuit, and the external interface circuit.

[0015] As a preferred embodiment of the present utility model, the communication circuit includes a 2.4GHz WiFi SoC chip, the 2.4GHz WiFi SoC chip is connected to the main control circuit, and the 2.4GHz WiFi SoC chip integrates an IEEE802.11b / g / n baseband and an RF circuit.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By setting the external interface circuit, the expandability and compatibility of the device are improved, enabling users to add or upgrade the functions of the doorbell according to their needs;

[0018] 2. By setting the Hall anti-tampering circuit, it can detect in real time whether the doorbell device is illegally removed or moved, effectively preventing the device from being stolen;

[0019] 3. Through the combination of the ambient photosensitive detection circuit and the filter driver circuit, the electronic cat's eye can automatically detect the ambient light conditions and switch the filter mode accordingly, ensuring that clear and real images can be captured regardless of whether it is day or night.

[0020] 4. The communication circuit uses a 2.4GHz WiFi SoC chip, providing high-speed and stable wireless network communication, supporting remote data upload and reception, enabling users to view the real-time images of the device and receive alarm information through the APP cloud at any time and anywhere. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is the principle block diagram of the low-power doorbell circuit in an embodiment of the present invention;

[0023] Figure 2 It is the circuit schematic diagram of part A of the main control circuit in an embodiment of the present invention;

[0024] Figure 3 It is the circuit schematic diagram of part B of the main control circuit in an embodiment of the present invention, where the circuit schematic diagram of part A and the circuit schematic diagram of part B together form the complete circuit schematic diagram of the main control circuit;

[0025] Figure 4 It is the circuit schematic diagram of the image sensing circuit in an embodiment of the present invention;

[0026] Figure 5 It is the circuit schematic diagram of the ambient photosensitive detection circuit in an embodiment of the present invention;

[0027] Figure 6 It is the circuit schematic diagram of the filter driver circuit in an embodiment of the present invention;

[0028] Figure 7 It is the circuit schematic diagram of the Hall anti-tampering circuit in an embodiment of the present invention;

[0029] Figure 8 It is the circuit schematic diagram of the communication circuit in an embodiment of the present invention;

[0030] Figure 9 It is the circuit schematic diagram of the external interface circuit in an embodiment of the present invention;

[0031] Figure 10 This is the principle block diagram of the low-power doorbell circuit in another embodiment of the present utility model;

[0032] Figure 11 This is the circuit schematic diagram of the charging management circuit in another embodiment of the present utility model;

[0033] Figure 12 This is the circuit schematic diagram of the power-on and power-off circuit in another embodiment of the present utility model;

[0034] Figure 13 This is the circuit schematic diagram of the RF433 wireless circuit in another embodiment of the present utility model;

[0035] Figure 14 This is the circuit schematic diagram of the audio acquisition circuit in another embodiment of the present utility model;

[0036] Figure 15 This is the circuit schematic diagram of the audio amplification circuit in another embodiment of the present utility model;

[0037] Figure 16 This is the circuit schematic diagram of the TF card circuit in another embodiment of the present utility model;

[0038] Figure 17 This is the circuit schematic diagram of the NOR Flash circuit in another embodiment of the present utility model. Detailed implementation manners

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that: similar reference numerals and letters denote similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, it is declared that the embodiments described below are only used to explain the present utility model and are not used to limit the present utility model.

[0040] It should be noted that the terms "installation", "setting", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined.

[0041] Please refer to Figure 1, this embodiment provides a low-power doorbell circuit, including a main control circuit 1, an image sensing circuit 2, an ambient light photosensitive detection circuit 3, a filter driver circuit 4, a communication circuit 5, a Hall anti-tamper circuit 6, and an external interface circuit 7. The main control circuit 1 is respectively connected to the image sensing circuit 2, the ambient light photosensitive detection circuit 3, the filter driver circuit 4, the communication circuit 5, the Hall anti-tamper circuit 6, and the external interface circuit 7.

[0042] Please refer to Figure 2 , Figure 3 , the main control circuit 1 is used to receive and process the transmission data of each circuit module, and control the operation of each circuit module according to the corresponding processing results. The main control circuit 1 includes an SOC main control chip, and the SOC main control chip is respectively connected to the image sensing circuit 2, the ambient light photosensitive detection circuit 3, the filter driver circuit 4, the communication circuit 5, the Hall anti-tamper circuit 6, and the external interface circuit 7. Among them, the SOC main control chip integrates a new generation of high-performance ISP image processing module and SmartH2.65 video compression encoding module, integrates an artificial intelligence processing engine, and has excellent image processing capabilities, extremely high encoding quality, and intelligent processing capabilities. The SOC main control chip internally integrates a memory and has complete peripheral interfaces required for applications: USB, SDIO, Ethernet PHY, UART, SPI, mipi interface; supports the NN intelligent neural network hardware acceleration engine and network structures such as human and face.

[0043] Please refer to Figure 4 , the image sensing circuit 2 is used to collect image data, and transmit the collected image data to the SOC main control chip for processing. The SOC main control chip then uploads the processed image data to the APP cloud through the communication circuit 5 or saves it to the local SD card. Among them, the image sensing circuit 2 mainly includes an image sensor, and the image sensor is connected and communicates with the SOC main control chip through a MIPI serial communication interface. The image sensor uses an advanced digital CMOS image sensor, with a maximum supported transmission rate of 2304Hx1296V@30fps; outputs raw format images, and the effective pixel window is 2312Hx1304V. It supports complex on-chip operations - such as windowing, horizontal mirroring, vertical inversion, etc. It can read and write registers through a standard I2C interface, and the EFSYNC / FSYNC pins are used to externally control exposure.

[0044] Please refer to Figure 5 , Figure 6, the ambient light sensor circuit 3 is used to detect the ambient brightness change. When the ambient light sensor circuit 3 detects a change in the ambient brightness, it outputs the corresponding brightness change information to the SOC main control chip. The SOC main control chip sends the corresponding driving instruction to the filter driver circuit 4 according to the information processing result, and then drives the IRCUT filter to switch the display mode through the filter driver circuit 4. The IRCUT filter can switch the filter mode according to the ambient light conditions. During the day, it allows visible light to pass through, while at night or in low light conditions, it switches to the mode that allows infrared light to pass through.

[0045] Please refer to Figure 7 , the communication circuit 5 is responsible for the communication and data transmission between the device and the outside world. For example, it uploads the image data processed by the SOC main control chip to the APP cloud for remote viewing and storage by the user; when the PIR human detection circuit 3 detects human activities, the communication circuit 5 is responsible for uploading this event information to the APP cloud so that the user can understand and respond in a timely manner. In addition, the user can remotely configure and control the doorbell through the APP cloud, such as adjusting the image quality of the camera, setting the alarm mode, etc. These configuration and control instructions are sent to the SOC main control chip through the communication circuit 5. Among them, the communication circuit 5 mainly includes a highly integrated 2.4GHz WiFi SoC chip of Hi3861LV100. The 2.4GHz WiFi SoC chip is connected to the SOC main control chip. The 2.4GHz WiFi SoC chip integrates the IEEE 802.11b / g / n baseband and RF circuits. The RF circuit includes modules such as a power amplifier PA, a low noise amplifier LNA, an RF balun, an antenna switch, and power management. The IEEE 802.11b / g / n baseband supports the orthogonal frequency division multiplexing (OFDM) technology and is downward compatible with the direct sequence spread spectrum (DSSS) and complementary code keying (CCK) technologies, and supports various data rates of the IEEE 802.11b / g / n protocol. The 2.4GHz WiFi SoC chip has built-in SRAM and Flash and can operate independently. During the keep-alive sleep mode, the power consumption of the whole device can reach the uA level, achieving ultra-long standby.

[0046] Please refer to Figure 8 , the Hall anti-tamper circuit 6 is used to detect in real time whether the doorbell device is illegally removed or moved. Once the device is removed from the fixed bracket, the circuit will immediately send an alarm message to the SOC main control chip, thereby triggering corresponding security responses, such as emitting an alarm sound, sending a notification to the user's mobile phone APP, etc., enhancing the security of the device. By setting the Hall anti-tamper circuit 6, the theft of the device can be effectively prevented because once the device is removed, the alarm will be triggered immediately, deterring potential thieves.

[0047] Please refer to Figure 9, the external interface circuit 7 is used to connect external functional modules, such as infrared supplementary lighting, PIR human sensing, radar sensing, audio, buttons, USB, DC5V input functional modules, etc. Among them, the external interface circuit 7 provides various external interfaces such as SPI interface, UART interface, I2C interface, PWM interface, GPIO interface, and ADC interface, enabling the doorbell circuit to connect more types of external devices and functional modules. Since these external interfaces support different types of data transmission and signal control, users can add or upgrade the functions of the doorbell according to their needs.

[0048] Please refer to Figure 10 、 Figure 11 , in one embodiment, in order to enhance the independent operation ability and battery life performance of the low-power doorbell circuit, the low-power doorbell circuit further includes a battery 8, a charging management circuit 9, and a DC-DC circuit 10. The DC-DC circuit 10 is respectively connected to the battery 8, the charging management circuit 9, and the main control circuit 1. The battery 8 is also connected to the charging management circuit 9, ensuring that the device can work stably and reliably when unattended or remotely deployed. The battery 8 serves as the energy source of the entire system and is used to provide continuous power support for all circuit modules. The charging management circuit 9 is used to realize the intelligent management and maintenance of the battery 8. The DC-DC circuit 10 is responsible for converting the voltage of the battery 8 into the stable working voltage required by each circuit module.

[0049] Specifically, the charging management circuit 9 includes a charging management chip and a charging interface for connecting a charging adapter. The charging management chip is respectively connected to the charging interface, the battery 8, and the DC-DC circuit 10. The charging management chip is responsible for monitoring parameters such as the charging status, current, and voltage of the battery 8 to ensure a safe and efficient charging process. The charging interface is used to connect a traditional charging adapter, enabling the device to be charged through the mains power.

[0050] Please refer to Figure 10 、 Figure 12 , in one embodiment, the low-power doorbell circuit further includes a power-on / off circuit 11, and the power-on / off circuit 11 is connected to the main control circuit 1. The power-on / off circuit 11 is used to control the power-on and power-off of the system. Among them, the power-on / off circuit 11 mainly includes a switch SW1 and a MOS transistor. After pressing the switch SW1, the MOS transistor conducts, and the system powers on.

[0051] Please refer to Figure 10 、 Figure 13, in one embodiment, the low-power doorbell circuit further includes an RF433 wireless circuit 12, and the RF433 wireless circuit 12 is connected to the main control circuit 1. The RF433 wireless circuit 12 is used for wireless communication with the "ding-dong machine" indoors. When someone rings the doorbell outdoors, the device sends data through the RF chip of the RF433 wireless circuit 12, and the indoor "ding-dong machine" emits a sound prompt after receiving the instruction that someone is ringing the doorbell.

[0052] Please refer to Figure 10 、 Figure 14 、 Figure 15 , in one embodiment, the low-power doorbell circuit further includes an audio acquisition circuit 13 and an audio amplification circuit 14, and both the audio acquisition circuit 13 and the audio amplification circuit 14 are connected to the main control circuit 1. The audio acquisition circuit 13 is used for acquiring surrounding audio data and transmitting it to the SOC main control chip for processing. The SOC main control chip then uploads the processed audio data to the APP cloud or plays it locally through the communication circuit 5. The audio data received by the SOC main control chip is amplified by the audio amplification circuit 14 and played out in the form of a speaker.

[0053] Please refer to Figure 10 、 Figure 16 , in one embodiment, the low-power doorbell circuit further includes a TF card circuit 15, and the TF card circuit 15 is connected to the main control circuit 1. The TF card circuit 15 is used for storing data (videos, pictures, logs, etc.) or for the device upgrade function. When a new software version or firmware update is released, the user can store these update files in the TF card, and the main control circuit 1 will automatically detect the update files in the TF card and initiate the upgrade process.

[0054] Please refer to Figure 10 、 Figure 17 , in one embodiment, the low-power doorbell circuit further includes a NOR Flash circuit 16, and the NOR Flash circuit 16 is connected to the main control circuit 1. The NOR Flash circuit 16 is used for storing program codes, firmware, operating systems, and other data, and can achieve the rapid startup and stable operation of the device.

[0055] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

[0056] The above has made an exemplary description of the patent of the present utility model in conjunction with the drawings. Obviously, the implementation of the patent of the present utility model is not limited by the above methods. As long as various improvements are made by adopting the method concept and technical solution of the patent of the present utility model, or the concept and technical solution of the patent of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A low power doorbell circuit, characterized in that: It includes a main control circuit, an image sensor circuit, an ambient light detection circuit, a filter drive circuit, a communication circuit, a Hall anti-disassembly circuit and an external interface circuit for connecting external functional modules. The main control circuit is respectively connected to the image sensor circuit, the ambient light detection circuit, the filter drive circuit, the communication circuit, the Hall anti-disassembly circuit and the external interface circuit. The external interface circuit includes an SPI interface, a UART interface, an I2C interface, a PWM interface, a GPIO interface and an ADC interface.

2. The low power consumption doorbell circuit according to claim 1, characterized in that: It also includes a battery, a charging management circuit and a DC-DC circuit. The DC-DC circuit is connected to the battery, the charging management circuit and the main control circuit respectively, and the battery is also connected to the charging management circuit.

3. The low power consumption doorbell circuit according to claim 2, characterized in that: The charging management circuit includes a charging management chip and a charging interface for connecting a charging adapter, and the charging management chip is connected to the charging interface, the battery and the DC-DC circuit respectively.

4. The low power consumption doorbell circuit according to claim 1, characterized in that: It also includes a power on / off circuit, which is connected to the main control circuit.

5. The low power consumption doorbell circuit according to claim 1, characterized in that: It also includes an RF433 wireless circuit, and the RF433 wireless circuit is connected to the main control circuit.

6. The low power consumption doorbell circuit according to claim 1, characterized in that: It also includes an audio collection circuit and an audio amplifier circuit, and both the audio collection circuit and the audio amplifier circuit are connected to the main control circuit.

7. The low power consumption doorbell circuit according to claim 1, characterized in that: It also includes a TF card circuit, and the TF card circuit is connected to the main control circuit.

8. The low power consumption doorbell circuit according to claim 1, characterized in that: It also includes a NOR Flash circuit, which is connected to the main control circuit.

9. The low power consumption doorbell circuit according to claim 1, characterized in that: The main control circuit includes a SOC main control chip, and the SOC main control chip is respectively connected to the image sensor circuit, the ambient light detection circuit, the filter drive circuit, the communication circuit, the Hall anti-disassembly circuit and the external interface circuit.

10. The low power consumption doorbell circuit according to claim 1, characterized in that: The communication circuit comprises a 2.4 GHz WiFi SoC chip, the 2.4 GHz WiFi SoC chip is connected to the main control circuit, and the 2.4 GHz WiFi SoC chip integrates IEEE 802.11b / g / n baseband and RF circuit.

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