Kitchen fire turn-off forgetting monitoring circuit

Abstract

The utility model discloses a kitchen fire turn-off forgetting monitoring circuit, comprising a human body detection module comprising a millimeter wave radar module and a pyroelectric infrared module; the controller is connected with the human body detection module; the voice broadcast module is connected with the controller; the power supply module is respectively connected with the human body detection module, the controller and the voice broadcast module and is used for supplying power to the human body detection module, the controller and the voice broadcast module, and the millimeter wave radar module and the pyroelectric infrared module work cooperatively to detect the existence of the human body in the kitchen together. And the influence of high temperature or vibration on the detection precision of a single sensor is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the kitchen safety technical field, concretely relates to a kitchen forget to close fire monitoring circuit. BACKGROUND

[0002] In modern society, the popular rate of gas is very high, and the safety accidents of kitchen gas stove because user forget to close fire occur frequently, in order to solve this kind of problem, the market currently proposes a kind of dynamic fire alarm device, but the device is easily influenced by the environment temperature in the kitchen environment, and the result of detecting human body is inaccurate.

[0003] Therefore, how to accurately identify the existence of human body in the kitchen environment of higher temperature to control the gas on-off of gas stove is a technical problem to be solved by the person skilled in the art. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the technical problem of inaccurate human body identification in the kitchen environment of higher temperature in prior art, and provides a kitchen forget to close fire monitoring circuit, which comprises:

[0005] A human body detection module comprising a millimeter wave radar module and a pyroelectric infrared module;

[0006] A controller connected with the human body detection module;

[0007] A voice broadcast module connected with the controller;

[0008] A power module connected with the human body detection module, the controller and the voice broadcast module respectively, for supplying power to the human body detection module, the controller and the voice broadcast module.

[0009] Further, the sensitivity adjustment pin of the pyroelectric infrared module is connected with the DAC output pin of the controller through the resistor R203, and the sensitivity adjustment pin of the pyroelectric infrared module is also connected with the ground through the capacitor C206.

[0010] Further, the UART_RX pin of the millimeter wave radar is connected with the TX pin of the controller, and the UART_TX pin of the millimeter wave radar is connected with the RX pin of the controller.

[0011] Further, the audio input pin of the voice broadcast module is connected with the other end of the resistor R212, one end of the resistor R212 is connected with the other end of the capacitor C224, and one end of the capacitor C224 is connected with the output pin of the controller.

[0012] Further, the monitoring circuit further comprises a storage module connected with the controller. Further, the sensitivity adjustment pin of the pyroelectric infrared module is connected with the DAC output pin of the controller through the resistor R203, and the sensitivity adjustment pin of the pyroelectric infrared module is also connected with the ground through the capacitor C206. Further, the UART_RX pin of the millimeter wave radar is connected with the TX pin of the controller, and the UART_TX pin of the millimeter wave radar is connected with the RX pin of the controller. Further, the audio input pin of the voice broadcast module is connected with the other end of the resistor R212, one end of the resistor R212 is connected with the other end of the capacitor C224, and one end of the capacitor C224 is connected with the output pin of the controller.

[0013] Further, the input of the power module is a plurality of micro USB interfaces, and the plurality of micro USB interfaces at least include two kinds of packaging of standing and lying.

[0014] Further, the controller is integrated with a communication module.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] The kitchen fire forgetting monitoring circuit provided by the utility model, compared with the prior art, the circuit includes a human body detection module, including a millimeter wave radar module and a pyroelectric infrared module; a controller, connected with the human body detection module; a voice broadcast module, connected with the controller; a power module, connected with the human body detection module, the controller and the voice broadcast module respectively, for powering the human body detection module, the controller and the voice broadcast module, through the cooperative work of the millimeter wave radar module and the pyroelectric infrared module, the existence of the human body in the kitchen is detected, and the influence of high temperature or vibration on the detection accuracy of a single sensor is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 The structure schematic diagram of the kitchen fire forgetting monitoring circuit provided by the present application is shown;

[0019] Figure 2 The structure schematic diagram of the millimeter wave radar module in the present application is shown;

[0020] Figure 3 The structure schematic diagram of the pyroelectric infrared module in the present application is shown;

[0021] Figure 4 The structure schematic diagram of the voice broadcast module in the present application is shown;

[0022] Figure 5 The structure schematic diagram of the power module in the present application is shown;

[0023] Figure 6 The structure schematic diagram of the controller in the present application is shown. DETAILED DESCRIPTION

[0024] In order for those skilled in the art to better understand the technical solutions in the specification, the technical solutions in the specification will be clearly and completely described below in combination with the drawings in the specification. Obviously, the described embodiments are only a part of the embodiments of the specification, not all. Based on the embodiments in the specification, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the specification.

[0025] As Figure 1 The structure of the kitchen fire monitoring circuit provided by the embodiment of the present specification is shown in the figure. Although the structure shown in the following embodiments or figures is provided in the specification, more or less structures can be included in the structure based on conventional or non-creative labor, and these structures are not limited to the structures shown in the embodiments or figures of the specification. The structure can be executed sequentially or in parallel according to the embodiment or module structure when the structure is applied in actual device or terminal product.

[0026] The kitchen fire monitoring circuit provided in the embodiment of the present specification can be applied in various commercial and domestic kitchens. The circuit includes:

[0027] A human body detection module including a millimeter wave radar module and a pyroelectric infrared module;

[0028] A controller connected to the human body detection module;

[0029] A voice broadcast module connected to the controller;

[0030] A power module connected to the human body detection module, the controller and the voice broadcast module respectively, for powering the human body detection module, the controller and the voice broadcast module.

[0031] Specifically, the kitchen fire monitoring circuit in the present application at least includes a human body detection module, a controller, a voice broadcast module and a power module, wherein the human body detection module includes a millimeter wave radar module and a pyroelectric infrared module, and the millimeter wave radar module and the pyroelectric infrared module work together to effectively avoid the detection influence of high temperature or vibration on a single detection module, improve the human body detection accuracy in the kitchen, in addition, the circuit can also include a USB module, a storage module, a sampling module and a reset button, etc. The USB module can be directly connected with external equipment or power supply for the power module, for adjusting the detection accuracy of the human body detection module, the storage module is used for storing the record of each detection, the sampling module is used for sampling the working current, at the same time, the controller also integrates a communication module for wireless communication with a remote device to receive the instructions of the remote device.

[0032] In the embodiment of the present application, asFigure 2 As shown in the structural diagram of the millimeter wave radar module, the power supply pins of the millimeter wave radar are connected with one end of a capacitor C202 and a VCC power supply, and the other end of the capacitor C202 is grounded. Meanwhile, the UART_TX pin and the UART_RX pin of the millimeter wave radar are connected with the RX pin and the TX pin of the controller respectively, which are used to set the trigger threshold parameter of the radar module and obtain the distance value and other parameters. The radar recognition signal output pin OUT is connected with the network signal pin RADAR_OUT of the controller, which is used to obtain the state of the moving object recognized by the radar. The millimeter wave radar module specifically comprises:

[0033] The pin 1 of the chip P208 is connected with the VCC power supply and one end of the capacitor C202, and the other end of the capacitor C202 is grounded. The pin 2 of the chip P208 is grounded. The pin 3, the pin 4 and the pin 5 of the chip P208 are connected with the controller.

[0034] In the embodiment of the present application, as shown in the structural diagram of the millimeter wave radar module, Figure 3 As shown in the structural diagram of the pyroelectric infrared module, the power supply pin of the pyroelectric infrared module is also connected with a capacitor C219 and a capacitor C220 in parallel. The power supply pin of the pyroelectric infrared module can be filtered by the two capacitors in parallel. The sensitivity adjustment pin of the pyroelectric infrared module, that is, the pin 1, is connected with the pin 11, that is, the DAC pin, in the controller through the resistor R203. The sensitivity of the sensor can be adjusted by adjusting the high and low of the DAC output voltage. Meanwhile, the sensitivity adjustment pin of the pyroelectric infrared module is also grounded through the capacitor C206. The pyroelectric infrared module specifically comprises:

[0035] The pin 1 of the chip U205 is connected with the controller through the resistor R203. The pin 1 of the chip U205 is also connected with one end of the capacitor C206. The other end of the capacitor C206 is grounded. The pin 2 of the chip U205 is connected with the VCC power supply, one end of the capacitor C219 and one end of the capacitor C220 respectively. The pin 2 of the chip U205 is also connected with the pin 4 of the chip U205. The other end of the capacitor C219 and the other end of the capacitor C220 are both grounded. The pin 3 and the pin 6 of the chip U205 are both grounded. The pin 5 of the chip U205 is connected with the controller.

[0036] Specifically, the human body detection module is composed of an infrared pyroelectric sensor, i.e., a pyroelectric infrared module, and a 24G millimeter wave radar sensor, i.e., a millimeter wave radar module. The infrared pyroelectric sensor adopts a pyroelectric sensor with a sensitivity adjustment function using an external analog voltage, such as BS612, etc. The sensitivity control pin of the infrared pyroelectric sensor is connected with a pin with an analog voltage output function (DAC) in the controller. The sensitivity of the pyroelectric sensor can be controlled by controlling the output voltage of the DAC. The human body presence output signal of the pyroelectric sensor is connected with a common IO port of the controller. The millimeter wave radar module adopts a module with a serial port for configuring trigger threshold and other parameters, such as RD-03. The trigger threshold and other parameters of the radar module can be configured through the serial port. The human body presence signal output pin of the radar module is connected with a common IO port of the central control module.

[0037] In the embodiment of the present application, as shown in Figure 4 The pin 7 of the voice broadcast module is connected with the other end of the capacitor C223, the other end of the capacitor C201, a VCC power supply, and one end of the magnetic bead L202, respectively. The other end of the magnetic bead L202 is connected with +5Vin. The parameter of the magnetic bead L202 is 600Ω / 100MHz, which can suppress high-frequency noise and spike interference on the power line. At the same time, the capacitor C223 and the capacitor C201 can ensure the smoothness of the direct current input. The voice broadcast module specifically includes:

[0038] The pin 1 of the chip U202 is connected with the controller. The pin 2 of the chip U202 is grounded through the capacitor C221. The pin 3 of the chip U202 is connected with the other end of the resistor R211. One end of the resistor R211 is connected with the other end of the capacitor C222. One end of the capacitor C222 is grounded. The pin 4 of the chip U202, i.e., the audio input pin, is connected with the other end of the resistor R212. One end of the resistor R212 is connected with the other end of the capacitor C224. One end of the capacitor C222 is connected with the output pin of the controller. The pin 5 and the pin 8 of the chip U202 are both connected with the terminal post P202. The pin 6 of the chip U202 is grounded and is also connected with one end of the capacitor C223 and one end of the capacitor C201, respectively. The pin 7 of the chip U202 is connected with the other end of the capacitor C223, the other end of the capacitor C201, a VCC power supply, and one end of the magnetic bead L202, respectively. The other end of the magnetic bead L202 is connected with +5Vin.

[0039] Specifically, in order to realize the voice playing alarm function of the device and the flexible requirement of individualized customized voice, the audio decoding function and the DAC output function of the controller are used, the DAC output is connected to the input of the external audio power amplifier, the power supply is connected to the 600Ω / 100MHz magnetic bead to suppress the high frequency noise and peak interference on the power line. At the same time, the input voltage and the ground are connected to the 10uF and 1uF capacitors to ensure the smoothness of the direct current input. The positive and negative phase inputs of the audio power amplifier are connected according to the differential input working mode, and the RC circuit composed of 82nF capacitor and 100K resistor is used to isolate direct current and prevent signal interference, thereby protecting the integrity of the audio signal. At the same time, considering the update requirement of the audio file, a large capacity SPINOR flash (such as GD25Q80) is externally connected to the SPI pin of the controller to store the audio file, and the file of the storage module can be upgraded through Wi-Fi to meet the individualized requirement.

[0040] In the embodiment of the present application, as shown in Figure 5 The power module specifically comprises:

[0041] The pin 1 of the chip U401 is connected with +5Vin, one end of the capacitor C403 and the pin 3 of the chip U402, and the pin 1 of the chip U401 is also connected with the pin 4 of the chip U401, the other end of the capacitor C403 is grounded, the pin 2 of the chip U401 is grounded, the pin 3 of the chip U401 is connected with one end of the inductor L401, the other end of the inductor L401 is connected with one end of the resistor R401, one end of the capacitor C404 and the VCC power supply respectively, the other end of the capacitor C404 is grounded, the pin 5 of the chip U401 is connected with the other end of the resistor R401 and one end of the resistor R402 respectively, the other end of the resistor R402 is grounded, the pin 1 of the chip U402 is grounded, and the pin 2 and the pin 4 of the chip U402 are connected with the VCC power supply.

[0042] Specifically, the power module provides the required working voltage for the whole monitoring alarm device, and a DC-DC synchronous step-down IC with a switching frequency of 1.5MHz is used to reduce the 5V input voltage to 3.3V. The power input has multiple micro USB interfaces, and the multiple micro USB interfaces at least include two kinds of packaging of standing and lying, which are flexibly applicable to different power connection modes.

[0043] In the embodiment of the present application, as shown in Figure 6 The controller specifically comprises:

[0044] The pin 1 of the chip U201 is grounded, the pin 2 of the chip U201 is connected with a VCC power supply and one end of a capacitor C212 respectively, the other end of the capacitor C212 is grounded, the pin 3 of the chip U201 is connected with an EN pin in a USB module, the pin 25 of the chip U201 is connected with a GPIO0_down load pin in the USB module, the pin 4 of the chip U201 is connected with an ADC_VCC pin in a sampling module, the pin 7 of the chip U201 is connected with an ADC_USB_EN in the sampling module, the pin 5, the pin 9 and the pin 12 of the chip U201 are connected with an LED module, the pin 8 of the chip U201 is connected with a KEY pin in a reset button, the pin 10 of the chip U201 is connected with one end of a capacitor C224 in a voice broadcast module, the pin 11 of the chip U201 is connected with one end of a resistor R203 in a pyroelectric infrared module, the pin 13 of the chip U201 is connected with a pin 5 of the pyroelectric infrared module, the pin 14 of the chip U201 is connected with a pin 1 of a chip U202 in the voice broadcast module, the pin 15 and the pin 38 of the chip U201 are grounded, the pin 37 of the chip U201 is connected with a SPI_MOSI pin in a storage module, the pin 31 of the chip U201 is connected with a SPI_MISO pin in the storage module, the pin 30 of the chip U201 is connected with a SPI_CLK pin in the storage module, the pin 29 of the chip U201 is connected with a FLASH_SPI_CS pin in the storage module, the pin 35 of the chip U201 is connected with a U0TXD pin in the USB module, the pin 34 of the chip U201 is connected with a U0RXD pin in the USB module, the pin 28 of the chip U201 is connected with a pin 4 of a chip P208 in a millimeter wave radar module, the pin 27 of the chip U201 is connected with a pin 3 of the chip P208 in the millimeter wave radar module, and the pin 28 of the chip U201 is connected with a pin 5 of the chip P208 in the millimeter wave radar module.

[0045] Specifically, in order to realize efficient utilization of overall resources, a highly integrated Wi-Fi chip is selected as the core of overall control. The model of the chip U201 is ESP32, which works in a 2.4GHz frequency band. It not only allows the device to be flexibly connected to a Wi-Fi network or access other devices as a Wi-Fi access point in a station mode, a hotspot mode and a mixed mode, but also provides strong computing power and multitasking processing capability through its dual-core processor and rich peripheral resources, so that the ESP32 can be used as the MCU of the whole system. The ESP32 chip also provides analog output (DAC) function, analog acquisition (ADC) function and serial communication function.

[0046] It should be understood that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In addition, the term "connected" as used herein can include wirelessly connected. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0047] It should be understood that all or part of the embodiments of the present application can be realized in hardware, software, firmware, or combination thereof. In the above embodiments, multiple steps or methods can be realized in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if realized in hardware, as in another embodiment, it can be realized by any one or combination of the following technologies known in the art: discrete logic circuit having logic gates for implementing logic functions on data signals, application specific integrated circuit having appropriate combinational logic gates, programmable gate array (PGA), field programmable gate array (FPGA), etc.

[0048] Those skilled in the art can understand that all or part of the steps carried out by the above-mentioned embodiment methods can be completed by programs instructing relevant hardware, and the programs can be stored in a computer readable storage medium, and when executed, include one or a combination of steps of the embodiment methods.

[0049] In addition, each functional unit in each embodiment of the present application can be integrated in one processing module, or each unit can be physically present alone, or two or more units can be integrated in one module. The above-mentioned integrated module can be realized in the form of hardware or in the form of a software functional module. When the integrated module is realized in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0050] The above-mentioned storage medium can be a read-only memory, a magnetic disk or an optical disk, etc.

[0051] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present application have been shown and described above, it is to be understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and those ordinarily skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

[0053] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or replacements can be made, which should be considered as belonging to the protection scope of the present application.

Claims

1. A kitchen forget to turn off the fire monitoring circuit, characterized in that: The monitoring circuit comprises: Human body detection module, including millimeter wave radar module and pyroelectric infrared module; A controller connected to the human body detection module; A voice broadcast module connected to the controller; The power supply module is connected to the human body detection module, the controller and the voice broadcast module respectively, and is used to supply power to the human body detection module, the controller and the voice broadcast module.

2. The kitchen forget-to-turn-off monitoring circuit according to claim 1, characterized in that: The sensitivity adjustment pin of the pyroelectric infrared module is connected to the DAC output pin of the controller through the resistor R203, and the sensitivity adjustment pin of the pyroelectric infrared module is also grounded through the capacitor C206.

3. The kitchen forget-to-turn-off monitoring circuit according to claim 1, characterized in that: The UART_RX pin of the millimeter-wave radar is connected to the TX pin of the controller, and the UART_TX pin of the millimeter-wave radar is connected to the RX pin of the controller.

4. The kitchen fire monitoring circuit according to claim 1, characterized in that: The audio input pin of the voice broadcast module is connected to the other end of the resistor R212, one end of the resistor R212 is connected to the other end of the capacitor C224, and one end of the capacitor C224 is connected to the output pin of the controller.

5. The kitchen forget-to-turn-off monitoring circuit according to claim 1, characterized in that: The monitoring circuit further includes a storage module connected to the controller.

6. The kitchen forget-to-turn-off monitoring circuit according to claim 1, characterized in that: The input of the power module is a plurality of micro USB interfaces, and the plurality of micro USB interfaces include at least two types of packages: vertical sticker and horizontal sticker.

Images