TWI768634B - Anti-interference infrared induction drive device - Google Patents

Abstract

An anti-interference infrared induction drive device, which utilizes a carrier circuit to provide a carrier signal that is combined with a control signal to form a synthetic signal, and an infrared emission module to send out the infrared light implicating the synthetic signal, moreover, an infrared receiving module is used to receive the reflected light, and a central processing device is used to compare the synthetic signal with the reflected light, when the synthetic signal matches the reflected light, an electronic device is actuated to turn on or off, conversely, when the synthetic signal does not match the reflected light, the electronic device is not driven.

Description

Anti-interference infrared induction drive device

The present invention relates to an infrared sensing device, in particular to an infrared sensing driving device capable of anti-interference.

Generally, electronic devices such as electric lights, exhaust fans, and air conditioners need to be turned on or off by a physical switch. Therefore, the user needs to directly touch the physical switch to trigger the electronic device to turn on or off.

However, because the germs of epidemic diseases in today's society are easily transmitted through contact, the physical switch of the electronic device is easy to become a medium for the transmission of germs. Therefore, a technology that can control the electronic device without skin contact is required.

In order to overcome the aforementioned problems, the industry has developed a technology to control the opening or closing of electronic devices through infrared modules. , Generally, the infrared sensor module emits infrared light through the infrared transmitter, and when the infrared light is blocked by the user, part of the infrared light will be reflected and projected back to the infrared sensor module. When the infrared sensor module receives the reflected infrared light After that, the electronic device is triggered to turn on or off.

However, the conventional infrared sensor module is prone to incorrectly trigger the electronic switch due to the interference of external light, causing trouble for users. Anti-jamming infrared induction drive for drive electronics.

The present invention provides an anti-interference infrared induction driving device, the main purpose of which is to effectively shield external light, and identify the anti-interference infrared induction driving device that reflects infrared light and drives the electronic device correctly.

In order to achieve the aforementioned object, the present invention provides an anti-interference infrared induction driving device for driving an electronic device, and the anti-interference infrared induction driving device includes:

an infrared emitting module for emitting infrared rays;

an infrared receiving module for receiving infrared rays, defining the reflected light received by the infrared receiving module as a reflected light, and the reflected light has a test signal or a reflected composite signal;

a control chip, telecommunicationly connected with the infrared emitting module, for generating a control signal, and the control signal is sent out through the infrared emitting module;

A carrier circuit is telecommunicationly connected with the infrared emitting module and the control chip. The carrier circuit is used to form a carrier signal. The carrier signal is synthesized with the control signal to form a synthesized signal. The synthesized signal passes through the infrared emitting module. issued; and

a central processing unit, telecommunicationly connected with the infrared receiving module and the carrier circuit, the central processing unit is used for receiving the inspection signal or the reflected composite signal, and after receiving the inspection signal, the central processing unit performs processing with the control signal Comparing, if the frequency of the test signal is consistent with the control signal, trigger the carrier circuit to synthesize the carrier signal and the control signal into the synthetic signal, and the central processing device is also used for comparing the synthetic signal and the reflection synthesis signal to drive the electronic device to act.

As can be seen from the foregoing, the present invention mainly transmits infrared rays with control signals through the infrared emitting module normally, and when the infrared rays are blocked by the user, the infrared rays are reflected to the infrared receiving module and received by the infrared receiving module. The infrared receiving module transmits the inspection signal to the central processing unit. After the central processing unit receives the inspection signal, it compares the inspection signal with the control signal. If the frequency of the inspection signal matches the control signal, it will trigger The carrier circuit synthesizes the carrier signal and the control signal into the composite signal, the composite signal is sent out through the infrared emitting module, and when the infrared receiving module receives the reflected light, the reflected light has the reflected composite signal at this time, The central processing device further compares the composite signal with the reflected composite signal. When the composite signal matches the wavelength of each cycle of the reflected composite signal, it indicates that the reflected light received by the infrared receiving module is emitted by the infrared transmitting module. , then drive an electronic device to turn on or off. On the contrary, when the wavelength of the composite signal does not match the wavelength of each cycle of the reflected composite signal, it means that the reflected light received by the infrared receiving module is not emitted by the infrared transmitting module, so the signal is not driven. Electronic device action.

The present invention provides an anti-interference infrared induction driving device, please refer to Figures 1 to 8, including:

an infrared emitting module 10 for emitting infrared rays, in a specific embodiment, the infrared emitting module 10 can be an infrared emitting LED;

An infrared receiving module 20 is used for receiving infrared rays. When the infrared rays emitted by the infrared transmitting module 10 are blocked and reflected, they are received through the infrared receiving module 20, and the infrared receiving module 20 is defined to receive a reflected light R, The reflected light R has a test signal Z or a reflected composite signal N;

A control chip 30 is telecommunicationly connected to the infrared emitting module 10, and the control chip 30 is used to generate a control signal C, the control signal C is sent out through the infrared emitting module 10, so that the emitted infrared rays include the control signal C, at In a specific embodiment, the control chip 30 can be an 8051 chip or the like, and the control signal C can be a square wave with the same wavelength in each cycle;

A carrier circuit 40 is telecommunicationly connected with the infrared emitting module 10 and the control chip 30. The carrier circuit 40 is used to form a carrier signal. The carrier signal is synthesized with the control signal C to form a synthesized signal M. The synthesized signal M is emitted through the infrared emitting module 10. In this embodiment, the carrier signal and the control signal C can be synthesized through an AND GATE to form the synthesized signal M, and the synthesized signal M can be different for each periodic wavelength. the same square wave.

A central processing unit 50 is telecommunicationly connected to the infrared receiving module 20 and the carrier circuit 40 , the central processing unit 50 is controlled and connected to the electronic device 90 , and the central processing unit 50 is used for receiving the inspection signal Z of the reflected light R , when the central processing device 50 receives the test signal Z, it compares with the control signal C, if the test signal Z matches the frequency of the control signal C, the carrier circuit 40 is triggered to make the carrier signal and the control signal C The signal C is synthesized into the synthesized signal M, and the synthesized signal M is emitted through the infrared emission module 10. If the emitted infrared light is blocked by the user to generate the reflected light R, then the reflected light R implies a reflection The composite signal N, the central processing device 50 is also provided for comparing the composite signal M with the reflected composite signal N. When the composite signal M matches the wavelength of each cycle of the reflected composite signal N, it means that the infrared receiving module 20 receives the signal. The reflected light is emitted by the infrared emitting module 10, and then an electronic device 90 is driven to turn on or off. On the contrary, when the wavelength of each cycle of the composite signal M and the reflected composite signal N does not match, it means that the infrared receiving module 20 receives If the reflected light is not emitted by the infrared emitting module 10, the electronic device 90 is not driven to act.

Preferably, the infrared emitting module 10, the infrared receiving module 20, the control chip 30 and the carrier circuit 40 are mounted on a circuit board B, and the circuit board B has a first end B1 and a The second end B2, the infrared emitting module 10 is installed at the first end B1, the infrared receiving module 20 is installed between the first end B1 and the second end B2 of the circuit board B, by making The infrared emitting module 10 and the infrared receiving module 20 are installed on different positions of the circuit board B, so that the infrared receiving module 20 can only receive the reflected light source with a specific reflection angle, so as to reduce the light in the same field. interference:

Preferably, the circuit board B has an opposite upper side B3 and a lower side B4, and the infrared receiving module 20 is installed on the upper side B3 of the circuit board B. As shown in FIG.

Preferably, the lower side B4 also has an indicator light 31, the indicator light 31 is controlled and connected to the central processing device 50, and when the synthesized signal M matches the wavelength of each cycle of the reflected light R, the indicator light 31 is driven. Glows, it has been notified that it is in action.

In a preferred embodiment, the electronic device 90 of the present invention is an exhaust fan of a range hood, an automatic oil removal device of a range hood, a lamp segment adjustment device of a range hood or a timer of a range hood.

In a preferred embodiment of the present invention, a casing 70 is further included for being installed in a casing 91 of the electronic device 90 , the casing 70 has a first end 70A, and the first end 70A has an opening 71, and along the opening 71 has an accommodating space 72 inward, the infrared emitting module 10, the infrared receiving module 20, the control chip 30, the carrier circuit 40, and the central processing unit 50 are arranged in the container. In the housing space 72, the housing 70 has an outer surface 73, the outer surface 73 has two guide ribs 74, the two guide ribs 74 extend along a longitudinal direction X, the housing 70 has at the first end 70A A fixed convex ring 75, the fixed convex ring 75 is used to abut the casing 91 of the electronic device 90, one end of the two guide convex ribs 74 extends to the fixed convex ring 75, the guide convex rib 74 has a convex portion 741 and a concave portion 742 , the concave portion 742 is located at the joint between the guide rib 74 and the fixing convex ring 75 , the convex portion 741 protrudes outwardly from the concave portion 742 , when the housing 70 is installed on the housing 91 of the electronic device 90 , A rotating space 100 is formed between the recess 742 and the casing 91 of the electronic device 90 , so that the casing 70 can rotate relative to the casing 91 of the electronic device 90 .

On the other hand, if the environment around the infrared emitting module 10 refracts the infrared rays, it is easy for the infrared receiving module 20 to receive the refracted light, thereby erroneously driving the electronic device to turn on or off. Therefore, when the housing 70 is rotated, The user can rotate the casing 70 to adjust the angle and position of the infrared receiving module 20, thereby overcoming the negative factors brought by the environment, preventing the infrared receiving module 20 from incorrectly receiving refracted light, and avoiding excessive sensitivity occur.

Preferably, the casing 70 further has a second end 70B, and the second end 70B has a connection port 76 for controlling the connection between the central processing device 50 and the electronic device 90 .

Preferably, an accommodating rail is installed in the casing 70 , and the accommodating rail is used for erecting the circuit board B. As shown in FIG.

Preferably, it further includes a cover body 77, the cover body 77 covers the first end A of the casing 70, and closes the opening 71, thereby preventing dust or foreign matter from entering the casing 70, and the cover body 77 There is a light-transmitting portion 771 thereon, and the light-transmitting portion 771 is used for transmitting the infrared rays emitted by the infrared emitting module 10 or allowing the reflected infrared rays to penetrate.

In another embodiment, please refer to FIG. 4 , the infrared receiving module 20 is vertically disposed on the circuit board B, and the infrared receiving module 20 is covered with an outer casing 21 . There is an irradiation window 211 on the opposite sides respectively, and the irradiation window 211 is used for penetrating the reflected light, so that the infrared receiving module 20 can receive the reflected light.

The above is the specific structural configuration of the anti-interference infrared induction driving device of the present invention, and the operation mode of the anti-interference infrared induction driving device of the present invention is described as follows:

First, referring to FIG. 6 , the infrared emitting module 10 normally emits infrared rays with the control signal C, and when the infrared rays are blocked by the user, please refer to FIG. 7 , the infrared rays are reflected to the infrared receiving module 20 and receive the infrared rays. The module 20 receives, the infrared receiving module 20 transmits the inspection signal Z to the central processing device 50, and after the central processing device 50 receives the inspection signal Z, it compares the inspection signal Z and the control signal C, If the test signal Z matches the frequency of the control signal C, the carrier circuit 40 is triggered to synthesize the carrier signal and the control signal C into the synthetic signal M, please refer to FIG. 8 , the synthetic signal M passes through the infrared emitting module 10, and when the infrared receiving module 20 receives the reflected light R again, the reflected light R has the reflected combined signal N, and the central processing device 50 further compares the combined signal M with the reflected combined signal N , when the wavelength of each cycle of the composite signal M and the reflected composite signal N is consistent, it means that the reflected light received by the infrared receiving module 20 is emitted by the infrared transmitting module 10, and then an electronic device 90 is driven to turn on or off, and vice versa When the wavelengths of each cycle of the composite signal M and the reflected composite signal N do not match, it means that the reflected light received by the infrared receiving module 20 is not emitted by the infrared transmitting module 10, and the electronic device 90 is not driven to operate.

10: Infrared emission module 20: Infrared receiving module 21: Outer body 211: Irradiation window 30: Control chip 31: Indicator light 40: carrier circuit 50: Central processing unit 70: Shell 70A: First end 70B: Second end 71: Opening 72: accommodating space 73: Outer surface 74: Guide ribs 741: convex part 742: Recess 75: Fixed collar 76: Connector 77: Cover 771: Translucent part 90: Electronics 91: Shell 100: Rotation space X: Portrait C: Control signal M: composite signal R: Reflected light Z: Inspection signal B: circuit board B1: The first end B2: second end B3: upper side B4: lower side

FIG. 1 is a schematic diagram of the anti-interference infrared induction driving device and protective cover of the present invention. FIG. 2 is a schematic diagram of the anti-interference infrared induction driving device and protective cover of the present invention. FIG. 3 is a cross-sectional view of the anti-interference infrared induction driving device and the protective cover of the present invention. FIG. 4 is a schematic diagram of a preferred embodiment of an anti-interference infrared induction driving device and a protective cover of the present invention. FIG. 5 is a schematic diagram of the anti-interference infrared induction driving device of the present invention. FIG. 6 is a schematic diagram of the waveform of the anti-interference infrared induction driving device of the present invention that has not yet received reflected infrared light. FIG. 7 is a schematic diagram of the waveform of the reflected infrared light received by the anti-interference infrared induction driving device of the present invention. FIG. 8 is a schematic diagram of the waveform of the reflected infrared light received by the anti-interference infrared induction driving device of the present invention.

10: Infrared emission module

20: Infrared receiving module

30: Control chip

40: carrier circuit

50: Central processing unit

90: Electronics

Claims (10)

An anti-interference infrared induction driving device for driving a range hood, and the anti-interference infrared induction driving device comprises: an infrared emitting module for transmitting infrared rays; an infrared receiving module for receiving infrared rays, the definition The reflected light received by the infrared receiving module is a reflected light, and the reflected light has a test signal or a reflected composite signal; a control chip is telecommunicationly connected to the infrared transmitting module for generating a control signal, the control signal Send out through the infrared emitting module; a carrier circuit is connected with the infrared emitting module and the control chip telecommunication, the carrier circuit is used to form a carrier signal, the carrier signal is synthesized with the control signal to form a synthesized signal, the synthesized signal The signal is sent out through the infrared emitting module; and a central processing device is telecommunicationly connected with the infrared receiving module and the carrier circuit, and the central processing device is used for receiving the inspection signal or the reflection synthesis signal, when the central processing device receives the signal After the test signal is compared with the control signal, if the frequency of the test signal is consistent with the control signal, the carrier circuit is triggered to synthesize the carrier signal and the control signal into the synthetic signal. The range hood is driven to act by comparing the composite signal with the reflected composite signal. An anti-interference infrared induction driving device for driving an electronic device, and the anti-interference infrared induction driving device includes: an infrared emitting module for emitting infrared; an infrared receiving module for receiving infrared, defining the The reflected light received by the infrared receiving module is a reflected light, and the reflected light has a test signal or a reflected composite signal; a control chip is telecommunicationly connected with the infrared transmitting module to generate a control signal, and the control chip is used for generating a control signal. The control signal is sent out through the infrared emitting module; a carrier circuit is telecommunicationly connected with the infrared emitting module and the control chip, the carrier circuit is used to form a carrier signal, and the carrier signal is synthesized with the control signal to form a synthesized signal, The composite signal is sent out through the infrared emitting module; and a central processing device is telecommunicationly connected with the infrared receiving module and the carrier circuit, and the central processing device is used for receiving the inspection signal or the reflected composite signal, and when the central processing device is processed After the device receives the test signal, it compares it with the control signal, and if the test signal matches the frequency of the control signal, it triggers the carrier circuit to synthesize the carrier signal and the control signal into the synthetic signal, and the central processing device In addition, the composite signal is compared with the reflected composite signal to drive the electronic device to act. The anti-interference infrared induction driving device according to claim 1, wherein the infrared emitting module can be an infrared emitting LED. The anti-interference infrared induction driving device according to claim 1, wherein the control chip can be an 8051 chip. The anti-interference infrared induction driving device according to claim 1, further comprising a casing for being disposed on the casing of the range hood, the casing has a first end, and the first end has an opening, There is an accommodating space inward along the opening, the infrared emitting module, the infrared receiving module, the control chip, the carrier circuit, and the central processing device are arranged in the accommodating space, and the casing has a The outer surface has at least one guiding protruding rib, the guiding protruding rib extends along a longitudinal direction. one end of the guide rib extends to the fixed convex ring, the guide rib has a convex part and a concave part, the concave part is located at the joint between the guide convex rib and the fixed convex ring, and the convex part is larger than the fixed convex ring. The concave part is convex, and a rotating space is formed between the concave part and the casing of the range hood. The anti-interference infrared induction driving device as claimed in claim 5, wherein the casing further has a second end, and the second end has a connection port, and the connection port is used for controlling the connection between the central processing device and the range hood. . The anti-interference infrared induction driving device as claimed in claim 1, further comprising a cover body, the cover body covers the first end of the casing and closes the opening, and the cover body has a light-transmitting portion . The anti-interference infrared induction driving device according to claim 6, wherein the infrared emitting module, the infrared receiving module, the control chip and the carrier circuit are mounted on a circuit board, and the circuit board has an opposite one A first end and a second end, the infrared emitting die is assembled on the first end, and the infrared receiving die is assembled between the first end and the second end of the circuit board. The anti-interference infrared induction driving device according to claim 8, wherein the circuit board has an upper side and a lower side opposite, and the infrared receiving module is assembled on the upper side of the circuit board. The anti-interference infrared induction driving device as claimed in claim 9, wherein the lower side is further provided with an indicator light, and the indicator light is controlled and connected to the central processing device. When the synthesized signal matches the wavelength of each cycle of the reflected light, Then drive the indicator light to light up.

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