Electronic cat eye circuit

Abstract

The utility model discloses an electronic cat eye circuit which comprises a main control circuit, an image sensing circuit, a PIR human body detection circuit, an environment photosensitive detection circuit, an optical filter driving circuit, a communication circuit and an external circuit. The main control circuit is respectively connected with the image sensing circuit, the PIR human body detection circuit, the environment photosensitive detection circuit, the optical filter driving circuit, the communication circuit and the external circuit, the external circuit comprises an external mainboard, and a USB interface and a UART interface are reserved on the external mainboard. According to the utility model, through the arrangement of the external circuit, especially the reservation of the USB interface and the UART interface, abundant expansibility and compatibility are provided for the electronic cat eye.

Description

Technical Field

[0001] The utility model relates to the technical field of cat's eyes, in particular to an electronic cat's eye circuit. Background Art

[0002] A cat's eye, also known as a door mirror, is a small optical instrument installed on residential doors for residents to observe the situation outside the door. The structure of a traditional cat's eye mainly includes a lens barrel and a lens barrel jacket that matches the lens barrel set. The lens barrel and the lens barrel jacket are installed together through threaded cooperation. After the cat's eye is installed on the door, the lens of the lens barrel faces the outside of the door. When in use, the user can see the situation outside the house through the cat's eye hole in the house and through the lens. With the rapid development of technology and the growing demand of consumers for smart homes, electronic cat's eyes (or smart cat's eyes) are gradually replacing traditional cat's eyes and becoming an important part of modern home security monitoring.

[0003] Electronic cat eyes usually integrate multiple functions such as high-definition cameras, display screens, infrared night vision, motion detection, wireless communication (such as Wi-Fi or Bluetooth), etc. Its working principle is to capture the image outside the door through the built-in camera and display it in real time inside the house through the display screen. At the same time, the electronic cat eye also has an infrared night vision function, which can clearly display the scene outside the door in low light or at night. However, the existing electronic cat eyes are often a closed system, lacking standard external interfaces such as USB, HDMI or other expansion interfaces, making it impossible for users to directly connect external devices or add new functional modules, such as adding Bluetooth, fingerprint locks, NFC access control, and electronic lock function modules. Due to the lack of scalability, the functions of the electronic cat eye are limited to the range of 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 electronic cat's eye in the prior art lacks scalability and cannot customize functions according to the personalized needs of users, the utility model provides an electronic cat's eye circuit.

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

[0006] An electronic cat's eye circuit comprises a main control circuit, an image sensor circuit, a PIR human body detection circuit, an ambient light sensitive detection circuit, a filter drive circuit, a communication circuit and an external circuit, wherein the main control circuit is respectively connected to the image sensor circuit, the PIR human body detection circuit, the ambient light sensitive detection circuit, the filter drive circuit, the communication circuit and the external circuit, and the external circuit comprises an external mainboard, on which a USB interface and a UART interface are reserved.

[0007] The electronic cat's eye circuit according to the above solution further includes a power input circuit, which is connected to the main control circuit.

[0008] The electronic cat's eye circuit according to the above solution also includes an audio collection circuit, and the audio collection circuit is connected to the main control circuit.

[0009] The electronic cat's eye circuit according to the above solution also includes an audio amplifier circuit, which is connected to the main control circuit.

[0010] The electronic cat's eye circuit according to the above solution further includes a TF card circuit, and the TF card circuit is connected to the main control circuit.

[0011] The electronic cat's eye circuit according to the above solution further includes a NOR Flash circuit, and the NOR Flash circuit is connected to the main control circuit.

[0012] According to the electronic cat's eye circuit of the above scheme, 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 PIR human body detection circuit, the ambient light sensitive detection circuit, the filter drive circuit, the communication circuit and the external circuit.

[0013] According to the electronic cat's eye circuit of the above solution, the image sensing circuit includes an image sensor, and the image sensor is connected and communicated with the SOC main control chip through a MIPI serial communication interface.

[0014] According to the electronic cat's eye circuit of the above scheme, the PIR human body detection circuit includes a human body pyroelectric infrared sensor, and the human body pyroelectric infrared sensor is connected to the SOC main control chip.

[0015] According to the electronic cat's eye circuit of the above scheme, the communication circuit includes a 2.4GHz WiFi SoC chip, the 2.4GHz WiFi SoC chip is connected to the SOC main control chip, and the 2.4GHz WiFi SoC chip integrates IEEE802.11b / g / n baseband and RF circuit.

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

[0017] 1. Through the setting of external circuits, especially the reservation of USB and UART interfaces, the electronic cat eye is provided with rich scalability and compatibility, so that users can connect external storage devices, Bluetooth modules, fingerprint locks, NFC access control modules and other devices through these interfaces to achieve remote configuration, data export, remote control, alarm reception, access control and other functions;

[0018] 2. Through the combination of ambient light detection circuit and filter drive circuit, the electronic cat eye can automatically detect ambient light conditions and switch the filter mode accordingly, ensuring that the electronic cat eye can capture clear and true images regardless of day or night;

[0019] 3. Through the setting of PIR human body detection circuit, it can detect whether there is human activity around, and wake up the communication circuit to report the event to the APP cloud, which improves the response speed and security of the system;

[0020] 4. The communication circuit adopts 2.4GHz WiFi SoC chip, which provides high-speed and stable wireless network communication and supports remote data upload and reception, allowing users to view the real-time image of the electronic cat eye and receive alarm information through the APP cloud anytime 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a principle block diagram of an embodiment of the utility model;

[0023] Figure 2 This is a circuit diagram of part A of the main control circuit in one embodiment of the utility model;

[0024] Figure 3 The circuit diagram of part B of the main control circuit in one embodiment of the utility model, wherein the circuit diagram of part A and the circuit diagram of part B constitute a complete main control circuit diagram;

[0025] Figure 4 A circuit diagram of an image sensor circuit in one embodiment of the utility model;

[0026] Figure 5 A circuit diagram of a PIR human body detection circuit in an embodiment of the utility model;

[0027] Figure 6 A circuit diagram of an ambient light-sensitive detection circuit in one embodiment of the utility model;

[0028] Figure 7 A circuit diagram of a filter driving circuit in one embodiment of the utility model;

[0029] Figure 8 A circuit diagram of a communication circuit in one embodiment of the utility model;

[0030] Fig. 9 A circuit diagram of an external circuit in an embodiment of the utility model;

[0031] Fig.10 This is a functional block diagram of another embodiment of the utility model;

[0032] Fig.11 A circuit diagram of a power input circuit in another embodiment of the utility model;

[0033] Fig.12 This is a circuit diagram of an audio acquisition circuit in another embodiment of the utility model;

[0034] Fig.13 This is a circuit diagram of an audio amplifier circuit in another embodiment of the utility model;

[0035] Fig.14 This is a circuit diagram of a TF card circuit in another embodiment of the present utility model;

[0036] Fig.15 FIG. 4 is a circuit diagram of a NOR Flash circuit in another embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that similar numbers and letters represent 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 the subsequent drawings. At the same time, it is stated that the embodiments described below are only used to explain the utility model and are not used to limit the utility model.

[0038] It should be noted that the terms "install", "set", "connect", "fix" and the like should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. The indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the application product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, or the orientation or position relationship in which the application product is usually placed when in use, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly defined. "Several" means one or more, unless otherwise clearly defined.

[0039] See also Figure 1 This embodiment provides an electronic cat's eye circuit, including a main control circuit 1, an image sensor circuit 2, a PIR human body detection circuit 3, an ambient light sensitive detection circuit 4, a filter driving circuit 5, a communication circuit 6 and an external circuit 7. The main control circuit 1 is respectively connected to the image sensor circuit 2, the PIR human body detection circuit 3, the ambient light sensitive detection circuit 4, the filter driving circuit 5, the communication circuit 6 and the external circuit 7.

[0040] See also 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 mainly includes the SOC main control chip, which is respectively connected to the image sensor circuit 2, the PIR human body detection circuit 3, the ambient light detection circuit 4, the filter drive circuit 5, the communication circuit 6 and the external 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, and integrates an artificial intelligence processing engine, with excellent image processing capabilities, extremely high encoding quality and intelligent processing capabilities. The SOC main control chip integrates memory inside and has complete peripheral interfaces required for applications: USB, SDIO, Ethernet PHY, UART, SPI, mipi interface; supports NN intelligent neural network hardware acceleration engine, humanoid face and other network structures.

[0041] See also 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 or saves it to the local SD card through the communication circuit 6. Among them, the image sensing circuit 2 mainly includes an image sensor, and the image sensor is connected and communicated with the SOC main control chip through the MIPI serial communication interface. The image sensor adopts an advanced digital CMOS image sensor, which supports a maximum transmission rate of 2304Hx1296V@30fps; it 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., and can read and write registers through the standard I2C interface, and the EFSYNC / FSYNC pin realizes external control of exposure.

[0042] See also Figure 5 The PIR human body detection circuit 3 is based on passive infrared (PIR) technology and detects human activities by sensing infrared rays emitted by the human body. Among them, the PIR human body detection circuit 3 includes a human body pyroelectric infrared sensor, which is connected to the SOC main control chip. The human body usually emits infrared rays of a specific wavelength (about 10μm). The human body pyroelectric infrared sensor can receive and process these signals to determine whether the human body moves within the sensing range. When the device is in sleep or normal working state, when the human body pyroelectric infrared sensor detects human activities around it, it wakes up the communication circuit 6 and reports the event to the APP cloud.

[0043] See also Figure 6 , Figure 7 The ambient light detection circuit 4 is used to detect changes in the surrounding brightness. When the ambient light detection circuit 4 detects changes in the surrounding brightness, it outputs the corresponding brightness change information to the SOC main control chip. The SOC main control chip sends the corresponding driving instructions to the filter driving circuit 5 according to the information processing results, and then drives the IRCUT filter to switch the display mode through the filter driving circuit 5. The IRCUT filter can switch the filter mode according to the ambient light conditions. During the day, it allows visible light to pass through, and at night or under low light conditions, it switches to a mode that allows infrared light to pass through.

[0044] See also Figure 8, the communication circuit 6 is responsible for the communication and data transmission between the device and the outside world. For example, the image data processed by the SOC main control chip is uploaded to the APP cloud for users to view and store remotely; when the PIR human body detection circuit 3 detects human activity, the communication circuit 6 will be responsible for uploading this event information to the APP cloud so that users can understand and respond in time. In addition, users can remotely configure and control the electronic cat's eye through the APP cloud, such as adjusting the shooting angle 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 6. Among them, the communication circuit 6 mainly includes a highly integrated 2.4GHz WiFi SoC chip using Hi3861LV100, the 2.4GHzWiFi SoC chip is connected to the SOC main control chip, and the 2.4GHz WiFi SoC chip integrates IEEE 802.11b / g / n baseband and RF circuit. The RF circuit includes power amplifier PA, low noise amplifier LNA, RF balun, antenna switch and power management modules. The IEEE 802.11b / g / n baseband supports Orthogonal Frequency Division Multiplexing (OFDM) technology, and is backward compatible with Direct Sequence Spread Spectrum (DSSS) and Complementary Code Keying (CCK) technologies, supporting various data rates of the IEEE 802.11b / g / n protocol. The 2.4GHz WiFiSoC chip also integrates a high-performance 32-bit microprocessor, a hardware security engine, and a rich set of peripheral interfaces, including SPI, UART, I2C, PWM, GPIO, and multiple ADCs. It also supports a high-speed SDIO2.0 Slave interface with a maximum clock of 50MHz. The chip has built-in SRAM and Flash and can run independently. When in keep-alive hibernation, the power consumption of the entire device can reach uA level, achieving ultra-long standby.

[0045] See also Fig. 9, the external circuit 7 includes an external mainboard, and a USB interface and a UART interface are reserved on the external mainboard. The USB interface is used to transmit multimedia data such as video and picture files, which is convenient for users to export the data stored in the electronic cat's eye to an external storage device (such as a USB flash drive) or a computer for further viewing, backup or processing. Video and picture files can be transmitted through the USB interface. The UART interface is used for serial communication with an external expansion module / device, and the external expansion module / device includes a Bluetooth module, a fingerprint lock, an NFC access control module, an electronic lock, etc. After connecting the Bluetooth module through the UART interface, the user can easily communicate with the electronic cat's eye through a mobile phone or other Bluetooth device, such as remote control, receiving alarm information, etc. After connecting the fingerprint lock through the UART interface, the electronic cat's eye can be combined with the access control system to achieve a higher level of secure access control, and the user can unlock the access control through fingerprint verification to improve security. After connecting the NFC access control module through the UART interface, the electronic cat's eye supports devices using NFC (near field communication) technology for identity authentication and access control, further expanding the application scenario. After connecting to the electronic lock through the UART interface, the switch of the electronic lock can be directly controlled to achieve remote or automatic access control.

[0046] See also Fig.10 , Fig.11 In one embodiment, the electronic cat eye circuit further includes a power input circuit 8, which is connected to the main control circuit 1. The power input circuit 8 is used to connect an external power source. When the external power source is successfully connected and reduced to a suitable voltage through DC-DC, the power input circuit 8 will send a power-on signal to the main control circuit 1. After receiving the power-on signal, the main control circuit 1 will start the system initialization program and start each circuit module in the system in turn, so that the entire system starts to operate normally.

[0047] See also Fig.10 , Fig.12 In one embodiment, the electronic cat's eye circuit further includes an audio acquisition circuit 9, which is connected to the main control circuit 1. The audio acquisition circuit 9 is used to collect surrounding audio data and transmit 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 6.

[0048] See also Fig.10 , Fig.13 In one embodiment, the electronic cat's eye circuit further includes an audio amplifier circuit 10, which is connected to the main control circuit 1. The audio data received by the SOC main control chip is amplified by the audio amplifier circuit 10 and then played out in the form of a speaker.

[0049] See also Fig.10 , Fig.14In one embodiment, the electronic cat eye circuit further includes a TF card circuit 11, which is connected to the main control circuit 1. The TF card circuit 11 is used to store data (videos, pictures, logs, etc.) or to be used as a 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 start the upgrade process.

[0050] See also Fig.10 , Fig.15 In one embodiment, the electronic cat's eye circuit further includes a NOR Flash circuit 12, and the NOR Flash circuit 12 is connected to the main control circuit 1. The NOR Flash circuit 12 is used to store program codes, firmware, operating systems and other data, and can achieve fast startup and stable operation of the device.

[0051] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

[0052] The above is an exemplary description of the utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model patent is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the utility model patent, or the concept and technical solution of the utility model patent are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An electronic cat's eye circuit, characterized in that: It includes a main control circuit, an image sensor circuit, a PIR human body detection circuit, an ambient light sensitive detection circuit, a filter driving circuit, a communication circuit and an external circuit. The main control circuit is respectively connected to the image sensor circuit, the PIR human body detection circuit, the ambient light sensitive detection circuit, the filter driving circuit, the communication circuit and the external circuit. The external circuit includes an external mainboard, and a USB interface and a UART interface are reserved on the external mainboard.

2. The electronic cat's eye circuit according to claim 1, characterized in that: It also includes a power input circuit, which is connected to the main control circuit.

3. The electronic cat's eye circuit according to claim 1, characterized in that: It also includes an audio acquisition circuit, which is connected to the main control circuit.

4. The electronic cat's eye circuit according to claim 1, characterized in that: It also includes an audio amplifier circuit, which is connected to the main control circuit.

5. The electronic cat's eye 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.

6. The electronic cat's eye circuit according to claim 1, characterized in that: It also includes a NOR Flash circuit, and the NOR Flash circuit is connected to the main control circuit.

7. The electronic cat's eye 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 PIR human body detection circuit, the ambient light sensitive detection circuit, the filter drive circuit, the communication circuit and the external circuit.

8. The electronic cat's eye circuit according to claim 7, characterized in that: The image sensing circuit includes an image sensor, and the image sensor is connected and communicated with the SOC main control chip through a MIPI serial communication interface.

9. The electronic cat's eye circuit according to claim 7, characterized in that: The PIR human body detection circuit comprises a human body pyroelectric infrared sensor, and the human body pyroelectric infrared sensor is connected to the SOC main control chip.

10. The electronic cat's eye circuit according to claim 7, 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 SOC main control chip, and the 2.4 GHz WiFi SoC chip integrates IEEE 802.11b / g / n baseband and RF circuit.

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