Wireless ceiling-mounted infrared sensor

Abstract

This utility model relates to wireless IoT industry applications and smart building fields, and discloses a wireless ceiling-mounted infrared sensor, including a controller housing and a circuit board. The circuit board is installed inside the housing, and the bottom and top of the housing are connected by a snap-fit ​​mechanism. The circuit board further includes an infrared sensing unit, a photosensor unit, a self-organizing wireless module, an LED indicator unit, a power supply unit, and a dry contact control unit. The infrared sensing unit, photosensor unit, LED indicator unit, and dry contact unit are all signal-connected to the self-organizing wireless module. The self-organizing module and each functional unit are powered by the power supply unit. By adopting wireless communication technology and optimized hardware design, this sensor has lower production costs and higher ease of use. The wireless design simplifies the installation process, breaks the dependence on wiring in traditional infrared sensors, and improves the user experience.

Description

Technical Field

[0001] This utility model relates to wireless Internet of Things industry applications and smart building fields, specifically a wireless ceiling-mounted infrared sensor. Background Technology

[0002] With the continuous innovation and upgrading of infrared sensor technology, the market demand for high-performance sensors is increasing. The rapid development of Internet of Things (IoT) technology has driven applications in smart homes, smart offices, and other fields. As an important detection device, infrared sensors are widely used in security monitoring, environmental monitoring, energy management, and other scenarios. Their accuracy, sensitivity, and stability are constantly improving, enabling users to obtain more accurate and reliable data support.

[0003] Traditional infrared sensors often require complex wiring and incur high installation costs, limiting their application in certain situations. Furthermore, the performance of some sensors may be affected by environmental changes, leading to decreased detection accuracy. These issues have spurred the demand for more flexible, economical, and efficient infrared sensors. Utility Model Content

[0004] The purpose of this invention is to provide a wireless ceiling-mounted infrared sensor to solve the following technical problems: sensors often require complex wiring and high installation costs, which limits their application in certain situations.

[0005] The purpose of this utility model can be achieved through the following technical solution: a wireless ceiling-mounted infrared sensor, including a controller housing and a circuit function board, wherein the circuit function board is installed inside the housing, and the bottom and top of the housing are connected by a snap-fit ​​method. The circuit function board further includes an infrared sensing unit, a light sensing unit, a self-organizing wireless module, an LED indicator unit, a power supply unit, and a dry contact control unit.

[0006] The infrared sensing unit, the light sensing unit, the LED indicator unit, and the dry contact unit are all connected to the self-organizing wireless module. The self-organizing wireless module and each functional unit are powered by the power supply unit.

[0007] As a preferred embodiment of this utility model, the infrared sensing unit includes a digital intelligent pyroelectric infrared sensor with high power supply rejection ratio and resistance to radio frequency interference.

[0008] As a preferred embodiment of this utility model: the photosensor unit includes a photoresistor for detecting the ambient light intensity.

[0009] As a preferred embodiment of this utility model: the self-organizing wireless module includes a three-sided half-hole design and is connected to the circuit function board by surface mount soldering. The area of ​​the circuit function board below the antenna position of the wireless module is a blank rectangular area.

[0010] As a preferred embodiment of this utility model, the LED indicator unit can indicate the operating status of the device.

[0011] As a preferred embodiment of this utility model: the power supply unit includes an AC-DC conversion circuit and a linear regulated power supply. The AC-DC conversion circuit supports external AC 220V power supply, converts it to 5V through a non-isolated AC-DC chip, and further converts it to 3.3V through a linear regulated power supply. The input terminal of the power supply unit is connected to an external power supply terminal, the 5V output terminal is connected to the dry contact control unit, and the 3.3V output terminal is connected to the self-organizing wireless module, the infrared sensing unit, the photosensitive sensing unit, and the LED indicator unit.

[0012] As a preferred embodiment of this utility model: the dry contact control unit includes one isolated dry contact input, which can be linked with other dry contact devices.

[0013] The beneficial effects of this utility model are:

[0014] This invention, employing advanced wireless communication technology and optimized hardware design, results in a sensor with lower production costs and greater ease of use. The wireless design simplifies installation, eliminating the reliance on wiring inherent in traditional infrared sensors and enhancing the user experience. This product not only meets the needs of intelligent applications but also provides end-users with a flexible and efficient solution. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the framework of this utility model;

[0017] Figure 2 This is a schematic diagram of the infrared sensing unit in this utility model;

[0018] Figure 3 This is a schematic diagram of the photosensitizing unit in this utility model;

[0019] Figure 4 This is a schematic diagram of the self-organizing wireless module in this utility model;

[0020] Figure 5 This is a schematic diagram of the LED indicator unit in this utility model;

[0021] Figure 6 This is a schematic diagram of the AC-DC conversion circuit in this utility model;

[0022] Figure 7 This is a schematic diagram of the linear regulated power supply in this utility model;

[0023] Figure 8 This is a schematic diagram of the dry contact control unit in this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 As shown, this utility model is a wireless ceiling-mounted infrared sensor, including a controller housing and a circuit function board. The circuit function board is installed inside the housing. The bottom and top of the housing are connected by a snap-fit ​​method. The circuit function board further includes an infrared sensing unit, a light sensing unit, a self-organizing wireless module, an LED indicator unit, a power supply unit, and a dry contact control unit.

[0026] The infrared sensing unit, the light sensing unit, the LED indicator unit, and the dry contact unit are all connected to the signal of the self-organizing wireless module. The self-organizing wireless module and each functional unit are powered by the power supply unit.

[0027] The controller housing is a white, ceiling-mounted, recessed housing. The circuit board is embedded in the base plate of the housing, the middle cover is fixed to the base plate by clips, and the front cover is fixed to the middle cover by clips, forming a complete functional device.

[0028] Please see Figure 2 As shown, the infrared sensing unit includes a digital intelligent pyroelectric infrared sensor with high power supply rejection ratio and resistance to radio frequency interference. The infrared sensing unit includes an infrared sensor IR1, capacitor C5, capacitor C6 and resistor R7.

[0029] The power supply pin of the external sensor IR1 is connected to the power supply. The intersection of the power supply pin of the external sensor IR1 and the power supply is connected to one end of capacitor C5, and the other end of capacitor C5 is grounded.

[0030] The signal output pin of the external sensor IR1 is connected to one end of the resistor R7, the other end of the R7 is connected to one end of the capacitor C6, the other end of the capacitor C6 is connected to the ground pin of the external sensor IR1, and the intersection of the ground pin of the external sensor IR1 and the capacitor C6 is connected to ground.

[0031] The infrared sensing unit includes a TO-5 packaged digital intelligent pyroelectric infrared sensor Y916. Pin 1 of the sensor is connected to 3.3V and is also connected to a 0603 packaged 100nF / 50V capacitor for filtering; pin 3 is connected to GND; pin 2 is connected in series with a 0603 packaged 1K resistor and then connected to the PC1 port of the self-organizing wireless module. The PC1 port is also connected to a 0603 packaged 100nF / 50V capacitor for filtering.

[0032] Please see Figure 3 As shown, the photosensitive unit includes a photoresistor used to detect the ambient light level. The photosensitive unit includes an output signal, a photoresistor R6, and a resistor R8.

[0033] One end of resistor R8 is connected to the power supply, and the other end is connected to one end of photoresistor R6. The other end of photoresistor R6 is grounded, and the intersection of resistor R8 and photoresistor R6 is connected to the output signal.

[0034] The photosensitive sensor unit includes a plug-in, a GL5528 photoresistor with a P=3mm package. Pin 1 of the sensor is connected to GND; pin 2 is connected to the PC4 port of the self-organizing wireless module, and a 10K pull-up resistor in a 0603 package is also connected.

[0035] Please see Figure 4 As shown, the self-organizing wireless module has a three-sided half-hole design and is connected to the circuit board by surface mount soldering. The area of ​​the circuit board below the antenna of the wireless module is a blank rectangular area. The self-organizing wireless module includes a capacitor C1, a wireless module U2 and a microcontroller P5.

[0036] The power output port of wireless module U2 is connected to one end of capacitor C1, the other end of capacitor C1 is connected to the ground port of wireless module U2, the intersection of the power output port of wireless module U2 and capacitor C1 is connected to the power supply, and the intersection of the ground port of wireless module U2 and capacitor C1 is connected to the ground.

[0037] The power port of the microcontroller P5 is connected to the power supply, and the ground port of the microcontroller P5 is connected to ground.

[0038] The self-organizing network intelligent wireless module, model MT31, is a 2.4GHz band wireless sensor network communication module compliant with the IEEE 802.15.4 standard. It is designed around the TLSR8359F52 SoC processor chip. It hides the communication chip, necessary external components, and complex RF-related design processes such as high-frequency wiring, forming a stable communication module with high RF performance. It employs a three-sided half-hole design layout. The circuit board has a surface-mount package for the wireless module, allowing compatibility with other types of wireless modules with the same form factor, enabling flexible replacement of the wireless module.

[0039] Please see Figure 5 As shown, the LED indicator unit is used to indicate the operating status of the equipment. The LED indicator unit includes indicator LDE1, indicator LDE2, resistor R2, and indicator RLED.

[0040] One end of indicator light LDE1 is connected to the power supply, the other end of indicator light LDE1 is connected to one end of resistor R2, and the other end of R2 is connected to indicator RLED;

[0041] The junction of indicator light LDE1 and the power supply is connected to one end of indicator light LDE2, and the other end of indicator light LDE2 is connected to the junction of indicator light LDE1 and resistor R2.

[0042] The LED indicator unit includes two status indicators. Two red 0603 packaged indicators are connected in parallel, with the positive terminal connected to 3.3V; the negative terminals are shorted and connected in series with a 1K 0603 packaged resistor to the PC0 port of the self-organizing wireless module.

[0043] Please see Figure 6 and Figure 7 As shown, the power supply unit includes an AC-DC conversion circuit and a linear regulated power supply. The AC-DC conversion circuit supports external AC 220V power supply, converts it to 5V through a non-isolated AC-DC chip, and converts it to 3.3V through a linear regulated power supply. The input terminal of the power supply unit is connected to the external power supply terminal, the 5V output terminal is connected to the dry contact control unit, and the 3.3V output terminal is connected to the self-organizing wireless module, infrared sensing unit, photosensitive sensing unit, and LED indicator unit. The power supply unit includes an AC-DC conversion circuit and a linear regulated power supply. The AC-DC conversion circuit includes fuse FR1, resistor R1, electrolytic capacitor EC1, controller U1, inductor L2, capacitor C2, resistor R3, resistor R4, electrolytic capacitor EC2, and resistor R5.

[0044] The inductor pin of controller U1 is connected to one end of fuse FR1, the other end of fuse FR1 is connected to one end of resistor R1, the other end of resistor R1 is grounded, and the intersection of fuse FR1 and resistor R1 is connected to the live wire.

[0045] The input pin of controller U1 is connected to one end of electrolytic capacitor EC1, the other end of electrolytic capacitor EC1 is connected to the neutral line, the intersection of electrolytic capacitor EC1 and the input pin of controller U1 is connected to the output pin of controller U1, and the ground pin of controller U1 is connected to the neutral line.

[0046] The switch control pin of controller U1 is connected to one end of inductor L2, the other end of inductor L2 is connected to one end of electrolytic capacitor EC2, the other end of electrolytic capacitor EC2 is connected to the neutral line, the intersection of inductor L2 and electrolytic capacitor EC2 is connected to one end of resistor R4, the other end of resistor R4 is connected to one end of resistor R3, one end of resistor R3 is connected to one end of capacitor C2, and the other end of capacitor C2 is connected to the power supply pin of controller U1.

[0047] The intersection of the switch control pin of controller U1 and inductor L2 is connected to the intersection of capacitor C2 and resistor R3. The intersection of resistor R3 and resistor R4 is connected to the feedback pin of controller U1. The intersection of inductor L2 and electrolytic capacitor EC2 is connected to one end of resistor R5. The other end of resistor R5 is grounded. The intersection of resistor R5 and inductor L2 is connected to the power output terminal.

[0048] The linear regulated power supply includes regulator VR1, capacitor C3, capacitor C4, and capacitor C7;

[0049] The input pin of voltage regulator VR1 is connected to one end of capacitor C3, the other end of capacitor C3 is grounded, the intersection of the input pin of voltage regulator VR1 and capacitor C3 is connected to the output of AC-DC conversion circuit, and the ground pin of voltage regulator VR1 is connected to ground.

[0050] The output pin of voltage regulator VR1 is connected to one end of capacitor C4, and the other end of capacitor C4 is grounded. The intersection of the output pin of voltage regulator VR1 and capacitor C4 is connected to one end of capacitor C7, and the other end of capacitor C7 is grounded.

[0051] The power supply unit includes an ASOP-7 packaged non-isolated AC-CDC chip KP3116WP and an SOT-223-3 packaged LDO chip AMS1117-3.3. The high-voltage input neutral wire is shorted to GND; the high-voltage input live wire passes through a through-hole packaged wire-wound resistor KNP1W-10Ω±5%T, then is connected in parallel with the neutral wire to a through-hole packaged varistor 07D471K, and finally connected to pin 1 of the AC-CDC chip; pins 6 and 7 of the AC-CDC chip are shorted and connected to an 8*12mm packaged 6.8uF / 400V electrolytic capacitor to GND; pin 5 is connected to GND; pin 2 (output) is connected to an 8*10mm packaged 1mH I-type capacitor. After induction, the voltage is filtered by an 8*12mm packaged 470uF / 16V electrolytic capacitor to output 5V. The 5V output is connected to pin 4 of the ACDC chip via a 0805 packaged 91K resistor. Pin 4 is then connected to pin 2 via a 0805 packaged 36K resistor. A 0805 packaged 680nF / 50V capacitor is connected in parallel between pins 2 and 3 to form a feedback loop. A 0805 packaged 2K resistor is connected in parallel between the positive and negative terminals of the 5V output as a dummy load. The 5V output is filtered by a 0805 packaged 10uF / 16V capacitor and then connected to the input pin of the LDO. The GND pin of the LDO is connected to GND. The output pin is filtered by a 0805 packaged 10uF / 16V capacitor and then by a 0603 packaged 100nF / 50V capacitor to output 3.3V.

[0052] Please see Figure 8 As shown, the dry contact control unit includes one isolated dry contact input, which can be linked with other dry contact devices. The dry contact control unit includes converter U4, resistor R10, capacitor C8, optocoupler U3, and resistor R11.

[0053] The input pin of converter U4 is connected to the output of the AC-DC conversion circuit, the ground pin of converter U4 is connected to ground, the output pin of converter U4 is connected to one end of resistor R10, the other end of resistor R10 is connected to the anode of optocoupler U3, the load pin of converter U4 is connected to one end of capacitor C8, and the other end of capacitor C8 is connected to the cathode of optocoupler U3.

[0054] The emitter of optocoupler U3 is connected to one end of resistor R11, the other end of resistor R11 is connected to the power supply, and the collector of optocoupler U3 is connected to ground.

[0055] The dry contact control unit includes one isolated dry contact input. A 5V input is fed into the input terminal of a SIP-4 packaged isolated power supply module B0505S, and the output terminal provides isolated 5V power to power the dry contact circuit. The positive terminal of the isolated power supply is connected in series with a 1K resistor in a 0603 package to pin 1 of an SMD-4P packaged optocoupler PC817. Pin 2 of the optocoupler and the negative terminal of the isolated power supply are connected to an external terminal block, with a 100nF / 50V capacitor in a 0603 package connected in parallel for filtering. Pin 3 of the optocoupler is connected to GND. Pin 4 is connected to the PC5 port of the self-organizing wireless module, and a 10K pull-up resistor in a 0603 package is also connected.

[0056] The working principle of this utility model is as follows: The infrared sensing unit is connected to one GPIO port of the self-organizing wireless module; the photosensor unit is connected to one GPIO port of the self-organizing wireless module; the dry contact control unit is connected to one GPIO port of the self-organizing wireless module; the LED indicator unit is connected to one GPIO port of the self-organizing wireless module; the power supply unit's input terminal is connected to an external power supply terminal, its 5V output terminal is connected to the dry contact control unit, and its 3.3V output terminal is connected to the self-organizing wireless module, the infrared sensing unit, the photosensor unit, and the LED indicator unit. The self-organizing wireless module features a three-sided half-hole design and is connected to the circuit board via surface mount soldering. The area of ​​the circuit board below the antenna of the wireless module is a blank rectangular area. The infrared sensing unit includes a digital intelligent pyroelectric infrared sensor with high power supply rejection ratio and resistance to radio frequency interference. The photosensor unit includes a photoresistor to detect ambient light intensity for energy-saving operation. The dry contact control unit includes one isolated dry contact input, which can be linked with other dry contact devices. The LED indicator unit indicates the operating status of the device. The power supply unit supports external AC power. The 220V power supply is converted to 5V via a non-isolated AC-DC chip, and further converted to 3.3V via an LDO to power other units.

[0057] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.

Claims

1. A wireless ceiling infrared sensor comprising a controller housing and a circuit function board, said circuit function board is installed inside said housing, the bottom and top of said housing are connected by snap, characterized in that, The circuit board further includes an infrared sensing unit, a photosensitive sensing unit, a self-organizing wireless module, an LED indicator unit, a power supply unit, and a dry contact control unit. The infrared sensing unit, the light sensing unit, the LED indicator unit, and the dry contact unit are all connected to the self-organizing wireless module. The self-organizing wireless module and each functional unit are powered by the power supply unit.

2. The wireless ceiling infrared sensor according to claim 1, wherein, The infrared sensing unit includes a digital intelligent pyroelectric infrared sensor.

3. The wireless ceiling mount infrared sensor of claim 1, wherein, The photosensing unit includes a photoresistor, which is used to detect the ambient light level.

4. The wireless ceiling mount infrared sensor of claim 1, wherein, The self-organizing network wireless module has a three-sided half-hole design.

5. The wireless ceiling mount infrared sensor of claim 1, wherein, The LED indicator unit is used to indicate the operating status of the equipment.

6. The wireless ceiling-mounted infrared sensor according to claim 1, characterized in that, The power supply unit includes an AC-DC conversion circuit and a linear regulated power supply. The AC-DC conversion circuit supports external AC 220V power supply, converts it to 5V through a non-isolated AC-DC chip, and converts it to 3.3V through a linear regulated power supply. The input terminal of the power supply unit is connected to an external power supply terminal, the 5V output terminal is connected to the dry contact control unit, and the 3.3V output terminal is connected to the self-organizing wireless module, the infrared sensing unit, the photosensor unit, and the LED indicator unit.

7. The wireless ceiling-mounted infrared sensor according to claim 1, characterized in that, The dry contact control unit includes one isolated dry contact input.

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