CN208509330U - A kind of infrared induction night-light - Google Patents

Abstract

The utility model relates to a kind of infrared induction night-lights, including sequentially connected lighting module, control module and detection module, wherein, the detection module includes the detection chip and pyroelectric infrared sensor of power supply circuit, internal timer when being equipped with blind, detection chip connects infrared sensor and control module, and the first power supply passes through power supply circuit connecting detection chip.Detection chip is by configuring port and output port link control module, and for control module to detection chip transmitting configuration parameter, output port sends interrupt signal to control module for detection chip for configuration port；The acquisition port of the detection chip connects pyroelectric infrared sensor.Compared with prior art, the utility model presets the threshold of sensitivity of a suitable indoor environment by detection chip, it is ensured that the high sensitivity and stability of infrared induction night-light, guaranteeing that there are objects moving can produce interrupt signal.

Description

A kind of infrared induction night-light

Technical field

The utility model relates to sense light fields, more particularly, to a kind of infrared induction night-light.

Background technique

Infrared induction night-light be commonly used in night room lighting, such as toilet, corridor, parlor, bedroom needs place, Can also be used for rather dark place, for example, between storing, wardrobe etc..Infrared night-light generally has that structure is simple, at low cost, performance Relatively stable and extensive application environment advantage, therefore, various ceiling mounting types, portable infrared induction mini light night product are extensive It is received and is used by people.Infrared induction night-light follows the thinking of " people come i.e. bright, people is gone out from i.e. ", and solving night is not required to The problem of can turning on light by lamp switch is gone, particularly with very easy to use for action inconvenient people.

Although infrared induction night-light is largely used by people, from the point of view of the feedback information used from product still There is some defects.Decide whether to turn on light since infrared induction night-light is the infrared variable quantity of detection, in order to which guarantor is to i.e. Bright effect needs night-light to have very high sensitivity, will cause that rate of false alarm is very high, the phenomenon that people can be not bright in lamp yet occurs.Than Such as, the indoor ceiling mounting type infrared induction mini light night that crouches is mounted in order to avoid little tricks such as turns, and night-light false triggering is caused to turn on light The phenomenon that.Existing method is, by the sensitivity decrease of night-light, while the mode for increasing delay and multiple repairing weld filters Violate-action, but also result in that the reaction time is too long, artificially experience bad phenomenon.Meanwhile infrared sensor and general processing Chip is easily affected by temperature, and the imagination of false triggering is easy to cause at a temperature of temperature is relatively high, such as night-light is placed on window Side this may result in the case where lamp is frequently opened in the case where nobody on daytime.

Utility model content

The purpose of this utility model is exactly to provide a kind of infrared induction to overcome the problems of the above-mentioned prior art Night-light optimizes the stability of infrared induction night-light, makes it in the case where keeping very highly sensitive, can still will test Human infrared signal rapid feedback.

The purpose of this utility model can be achieved through the following technical solutions:

A kind of infrared induction night-light, including sequentially connected lighting module, control module and detection module, wherein described Detection module includes the detection chip and pyroelectric infrared sensor of power supply circuit, internal timer when being equipped with blind, detection chip Infrared sensor and control module are connected, the first power supply passes through power supply circuit connecting detection chip.

Further, the detection chip is used for by configuring port and output port link control module, configuration port Control module sends interrupt signal to control module for detection chip to detection chip transmitting configuration parameter, output port；Institute State the acquisition port connection pyroelectric infrared sensor of detection chip.

Further, infrared induction night-light according to claim 2, which is characterized in that the control module includes Inlet circuit, circuit of output terminal, low pressure voltage regulator circuit and governor circuit, wherein the governor circuit includes control chip, should The connecting detection chip of chip is controlled, second source passes sequentially through inlet circuit and connects control chip with low pressure voltage regulator circuit； Circuit of output terminal includes driving chip, and driving chip connection control chip, the lighting module connects driving chip.

Further, the lighting module includes six LED lamp tubes for being parallel to driving circuit both ends.

Further, the detection module is integrated on one piece of round pcb board.

Further, the diameter of the pcb board is 18mm.

Further, the detection chip uses the single-chip microcontroller of model E931.96.

Compared with prior art, the utility model has the advantage that

1, the utility model presets the threshold of sensitivity of a suitable indoor environment by detection chip, it is ensured that infrared Incude the high sensitivity and stability of night-light, guaranteeing that there are objects moving can produce interrupt signal.

2, for the utility model when detecting that object is mobile for the first time, control module receives the interruption that detection module transmitting comes Signal only accumulates a signal number at this time, does not light night-light directly；Timing when detection chip in detection module passes through blind Device suspends the detection of a period of time, and calculator is again started up detection after terminating timing when blind, only when detecting object again Mobile, control module receives second of interrupt signal, just lights night-light；The reason is that in actual living scene, in room Interference signal is often discontinuous in interior environment, and the frequency occurred is relatively low, uses the infrared sense of the utility model Night-light is answered, can utmostly reduce the probability of false triggering while guaranteeing night-light reliably working.

3, control chip uses the single-chip microcontroller of model E931.96, and performance and function are all more stable, internal complexity Algorithm inhibits extraneous interference signal well, has the advantages that super low-power consumption, meanwhile, it is not easily susceptible to the shadow of environment temperature It rings, also not easily leads to false triggering in the relatively high situation of temperature, automatic bright light etc. will not be generated because temperature increases on daytime Situation.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the circuit diagram of lighting module；

Fig. 3 is the circuit diagram of control module；

Fig. 4 is the circuit diagram of detection module；

Fig. 5 is the overall structure diagram of detection module；

Fig. 6 is the operation principle schematic diagram of detection chip；

Fig. 7 is the flow diagram of the utility model control method.

Detailed description of the invention: 1, detection module, 2, control module, 3, lighting module, 11, detection chip, 12, rpyroelectric infrared biography Sensor, 13, power supply circuit, 21, inlet circuit, 22, circuit of output terminal, 23, low pressure voltage regulator circuit, 24, governor circuit, 221, Driving chip, 241, control chip, 242, burning/recording chip.

Specific embodiment

The utility model is described in detail in the following with reference to the drawings and specific embodiments.The present embodiment is with the utility model Implemented premised on technical solution, the detailed implementation method and specific operation process are given, but the guarantor of the utility model Shield range is not limited to the following embodiments.

As shown in Figure 1, present embodiments providing a kind of infrared induction night-light, including lighting module 3, control module 2 and inspection Survey 1 three parts of module.Wherein, detection module 1 is the core cell of infrared induction night-light, that is, determines infrared induction night-light Stability also influences the Product Experience of infrared induction night-light.The present embodiment constitutes detection mould based on the E931.96 chip of elmos Block 1, as shown in Figures 2 and 3.Detection module 1 is integrated on the round pcb board that one piece of diameter is 18mm, includes power supply on pcb board Circuit 13, detection chip 11 and pyroelectric infrared sensor 12, detection chip 11 divide connection pyroelectric infrared sensor 12 and control Molding block 2；First power supply provides power supply by 13 connecting detection chip 11 of power supply circuit；The type of pyroelectric infrared sensor 12 Number be RE200BE-P.

The configuration port of E931.96 chip, output port and acquisition port respectively correspond for SERIN pin, INT pin and PIRIN pin.E931.96 chip is by SERIN pin and INT pin link control module 2, and SERIN pin is for controlling mould Block 2 is to E931.96 chip transmitting configuration parameter, and the signal that E931.96 chip will test INT pin is in a manner of interrupting It is sent to control module 2；PIRIN pin connects pyroelectric infrared sensor 12.

As shown in figure 4, the working principle of E931.96 chip are as follows: be equipped in chip one it is blind when timer, E931.96 core After piece detects movable signal, INT pin provides rising along interrupt signal and detects and keep high level, and control module receives INT pin is dragged down into the interruption in 100ns removing E931.96 chip after INT pin interrupt signal, timer starts timing when blind Blind time (Blind time) and movable signal is not detected, blind time timing terminates to start to detect movable signal again.

The working principle of entire detection module are as follows: pyroelectric infrared sensor 12 sends extraneous infrared signal amount to E931.96 chip remembers primary effective pulse when extraneous infrared variable quantity is more than the threshold value of setting, if when limiting detection Interior (limiting detection time to be arranged by Window time register) effective umber of pulse reaches the number of pulses (pulse of setting Quantity is arranged by Programmable pulse counter register), E931.96 chip issues to control module 2 and interrupts letter Number, i.e., INT pin becomes high level by low level, and control module 2 will be in the INT pin drop-down 100ns removing of E931.96 chip Break signal, E931.96 chip start timing blind time when blind (blind time by timer setting), i.e., do not locate within the regular hour The signal for managing infrared radiation source variation starts detection infrared radiation source variable quantity next time again at the end of blind time measurement.

As shown in figure 5, control module includes inlet circuit 21, circuit of output terminal 22, low pressure voltage regulator circuit 23 and master control Circuit 24.Wherein, governor circuit 24 includes control chip 241, and the control chip 241 is using model STM32F030F4P6's Single-chip microcontroller, the INT pin of the PB1 pin connection E931.96 chip of the control chip 241, PA7 pin connect E931.96 chip SERIN pin, second source pass sequentially through inlet circuit 21 and low pressure voltage regulator circuit 23 connection control chip 241；Output Terminal circuit 22 includes driving chip 221, and the PA6 pin of the CTRL pin connection control chip 241 of the driving chip 221 is described Lighting module 3 connects driving chip 221.Low pressure voltage regulator circuit 23 is using the low-dropout regulator with high output voltage precision (AP7343), control module can be made to support the input voltage of 3V~5.5V；Driving chip 221 is Buck-type switched-mode LED Driving chip (AL8807)；The OSC pin of E931.96 chip connects crystal oscillator；The UART RX pin and UART of E931.96 chip TX pin connects burning/recording chip 242, and burning/recording chip 242 carries out burning by the 2nd pin, the 4th pin, the 6th pin, the 8th pin The program for controlling chip 241 carries out tuning parameter by the 1st pin, the 3rd pin and the 5th pin.

The control module of infrared induction night-light control section can also there are many selection, such as bluetooth (BLE), ZigBee are logical Interrogate the general class chip such as class chip or STM8, STM32.The present embodiment using STM32F030F4P6 as master chip R & D design, Its code is the prior art, can be transplanted.Control module is construed to whether control night-light needs to light with straightaway, i.e., When control module receives the interrupt signal that detection module provides, current interrupt signal is handled, is judged according to the algorithm of design Whether need to light night-light.The present embodiment passes through a set of calculation being quick on the draw and inhibit interference effect good of continuous experimental design Method can be transplanted in the control module of different type chips and use, and main function code is as follows:

MCU in code is to control chip, and TIM3 and TIM14 are detection timer, and PIR is detection chip.By generation Code is it is found that by the setting and control to TIM3 timer, it can be achieved that the function of infrared induction night-light late release, as works as lamp After lighting starting, night-light continues to test the movement of object, if 30 seconds extinguish night-light, if there is object to movement without object detection Body is mobile, then recalculates 30 seconds.

As shown in fig. 6, lighting module includes six LED lamp tubes for being connected in parallel on 2 both ends of control module, it is followed successively by from left to right LED1, LED2, LED3, LED4, LED5, LED6, fluorescent tube are all made of model 67-21S/KK7C-HXXXX34Z15/DT's (GC) Warm white lamp.

As shown in Figure 7, the control method of the present embodiment include specifically includes the following steps:

Step 701. is 2 seconds by the detection cycle that Window time register presets detection module；

Step 702. control module removes interrupt signal and cumulative frequency；

Step 703. reaches detection cycle and starts to detect whether that there are objects moving, if so, executing step 704；If it is not, repeating Execute step 703；

Step 704. detection module sends an interrupt signal to control module；

Step 705. control module removes interrupt signal, and by the number of interrupt signal cumulative 1；

Timer is closed after starting 1 second when step 706. is blind, and detection module stops working during starting；

Timer detects whether that there are objects moving after closing again immediately when step 707. is blind, if so, executing step 708； If it is not, executing step 709；

Step 708. is by the number of interrupt signal cumulative 1；

Step 709. judges whether interrupt signal number is more than or equal to 2, if so, executing step 710；If it is not, executing step 702；

Step 710. starts lighting module.

The preferred embodiments of the present invention have been described in detail above.It should be appreciated that the ordinary skill people of this field Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks Technical staff passes through logic analysis, reasoning or limited reality according to the design of the utility model on the basis of existing technology in domain Available technical solution is tested, it all should be within the scope of protection determined by the claims.

Claims (7)

1. a kind of infrared induction night-light, which is characterized in that including sequentially connected lighting module, control module and detection module, Wherein, the detection module includes the detection chip and pyroelectric infrared sensor of power supply circuit, internal timer when being equipped with blind, Detection chip connects infrared sensor and control module, and the first power supply passes through power supply circuit connecting detection chip.

2. infrared induction night-light according to claim 1, which is characterized in that the detection chip is by configuring port and defeated Exit port link control module, configuration port is for control module to detection chip transmitting configuration parameter, and output port is for examining It surveys chip and sends interrupt signal to control module；The acquisition port of the detection chip connects pyroelectric infrared sensor.

3. infrared induction night-light according to claim 2, which is characterized in that the control module include inlet circuit, Circuit of output terminal, low pressure voltage regulator circuit and governor circuit, wherein the governor circuit includes control chip, the control chip Connecting detection chip, second source pass sequentially through inlet circuit and connect control chip with low pressure voltage regulator circuit；Circuit of output terminal Including driving chip, driving chip connection control chip, the lighting module connects driving chip.

4. infrared induction night-light according to claim 3, which is characterized in that the lighting module includes being parallel to driving electricity Six LED lamp tubes at road both ends.

5. infrared induction night-light according to claim 1, which is characterized in that the detection module is integrated in one piece of circle On pcb board.

6. infrared induction night-light according to claim 5, which is characterized in that the diameter of the pcb board is 18mm.

7. infrared induction night-light according to claim 1, which is characterized in that the detection chip uses model The single-chip microcontroller of E931.96.