CN105891158B - Circuit for detecting attachment magnitude, sensor and range hood - Google Patents
Circuit for detecting attachment magnitude, sensor and range hood Download PDFInfo
- Publication number
- CN105891158B CN105891158B CN201610196103.9A CN201610196103A CN105891158B CN 105891158 B CN105891158 B CN 105891158B CN 201610196103 A CN201610196103 A CN 201610196103A CN 105891158 B CN105891158 B CN 105891158B
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistor
- infrared
- attachment
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
- G01N2021/4764—Special kinds of physical applications
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a circuit for detecting an attachment quantity value, a sensor and a range hood, wherein the circuit for detecting the attachment quantity value comprises a control circuit, an infrared transmitting circuit, an infrared receiving circuit and a signal amplifying circuit; the control end of the control circuit is connected with the controlled end of the infrared transmitting circuit, the feedback end of the control circuit is connected with the output end of the signal amplifying circuit, and the input end of the signal amplifying circuit is connected with the output end of the infrared receiving circuit. The technical scheme of the invention can accurately detect the magnitude of the attachment.
Description
Technical Field
The invention relates to the technical field of range hoods, in particular to a circuit for detecting an attachment quantity value, a sensor and a range hood.
Background
Although the range hood has obvious fume removing effect, not only purifies indoor environment, but also improves indoor air quality, when the range hood operates, oil stains are easy to adhere to a shell of the range hood and a fan impeller, the oil stains are difficult to remove after being formed, and after the oil stains are formed for a long time, negative effects can be brought to the operation of the range hood, and a user cannot determine when the range hood needs to be cleaned, so that the range hood is very inconvenient.
Disclosure of Invention
The invention mainly aims to provide a circuit for detecting the magnitude of attachments, which aims to realize the detection of the dirt degree of a range hood so as to facilitate timely cleaning of a user.
In order to achieve the above object, the circuit for detecting the magnitude of the attachment provided by the invention comprises a control circuit, an infrared transmitting circuit, an infrared receiving circuit and a signal amplifying circuit; the control end of the control circuit is connected with the controlled end of the infrared transmitting circuit, the feedback end of the control circuit is connected with the output end of the signal amplifying circuit, and the input end of the signal amplifying circuit is connected with the output end of the infrared receiving circuit; the infrared emission circuit is used for emitting infrared rays to the attachment to be detected; the infrared receiving circuit is used for receiving the infrared rays reflected by the attachment to be detected and outputting an electric signal corresponding to the intensity of the received infrared rays; the signal amplification circuit is used for amplifying the electric signal output by the infrared receiving circuit and transmitting the electric signal to the control circuit; and the control circuit is used for controlling the infrared emission circuit to work and calculating the amount of the attachment to be detected according to the electric signal output by the signal amplification circuit.
Preferably, the infrared emission circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch tube, a first infrared emission tube and a second infrared emission tube; the first end of the second resistor is a controlled end of the infrared emission circuit, and the second end of the second resistor, the first end of the first resistor and the controlled end of the first switching tube are interconnected; the second end of the first resistor and the input end of the first switch tube are connected with a power supply, and the output end of the first switch tube, the first end of the third resistor and the first end of the fourth resistor are interconnected; the second end of the third resistor is grounded through the first infrared transmitting tube, and the second end of the fourth resistor is grounded through the second infrared transmitting tube.
Preferably, the infrared receiving circuit comprises a fifth resistor, a sixth resistor, a seventh resistor and an infrared receiving tube; the input end of the infrared receiving tube is connected with a power supply, and the output end of the infrared receiving tube, the first end of the fifth resistor and the first end of the sixth resistor are interconnected; a second end of the sixth resistor is connected with a first end of the seventh resistor, and a connection node of the sixth resistor and the seventh resistor is an output end of the infrared receiving circuit; a second terminal of the fifth resistor and a second terminal of the seventh resistor are grounded.
Preferably, the signal amplification circuit is a differential amplification circuit.
Preferably, the differential amplifying circuit includes an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and an operational amplifier; a first end of the eighth resistor is connected with a power supply, and a second end of the eighth resistor, a first end of the ninth resistor and a first end of the tenth resistor are interconnected; a second end of the tenth resistor, a first end of the eleventh resistor and an inverting input end of the operational amplifier are interconnected; the second end of the eleventh resistor is connected to the output end of the operational amplifier, the connection node of the eleventh resistor and the operational amplifier is the output end of the differential amplification circuit, and the homodromous input end of the operational amplifier is the input end of the differential amplification circuit.
Preferably, the control circuit comprises a control chip and a first capacitor; the input end of the control chip is the feedback end of the control circuit, and the control end of the control chip is the control end of the control circuit; the first end of the first capacitor and the power end of the control chip are connected with a power supply, and the second end of the first capacitor and the grounding end of the control chip are grounded.
Preferably, the circuit for detecting the attachment quantity value further comprises a communication interface, and the communication interface is used for communication between the circuit for detecting the attachment quantity value and other equipment.
Preferably, the communication mode between the circuit for detecting the attachment quantity value and other equipment is wireless communication or wired communication.
The invention also provides a sensor for detecting the attachment quantity value, which comprises the circuit for detecting the attachment quantity value; the circuit for detecting the magnitude of the attachment comprises a control circuit, an infrared transmitting circuit, an infrared receiving circuit and a signal amplifying circuit; the control end of the control circuit is connected with the controlled end of the infrared transmitting circuit, the feedback end of the control circuit is connected with the output end of the signal amplifying circuit, and the input end of the signal amplifying circuit is connected with the output end of the infrared receiving circuit; the infrared emission circuit is used for emitting infrared rays to the attachment to be detected; the infrared receiving circuit is used for receiving the infrared rays reflected by the attachment to be detected and outputting an electric signal corresponding to the intensity of the received infrared rays; the signal amplification circuit is used for amplifying the electric signal output by the infrared receiving circuit and transmitting the electric signal to the control circuit; and the control circuit is used for controlling the infrared emission circuit to work and calculating the amount of the attachment to be detected according to the electric signal output by the signal amplification circuit.
The invention also provides a range hood, which comprises the sensor for detecting the attachment quantity value, wherein the specific structure of the sensor refers to the above, and the detailed description is omitted here.
According to the technical scheme, the infrared transmitting circuit is adopted to transmit infrared rays to the attachment to be detected, the infrared receiving circuit receives the infrared rays reflected by the attachment and outputs the electric signals with corresponding sizes, so that the control circuit can accurately calculate the magnitude of the attachment to be detected according to the electric signals. In addition, the differential amplifier circuit is arranged to amplify the electric signal output by the infrared receiving circuit and then transmit the electric signal to the control circuit, so that the sensitivity of the circuit for detecting the magnitude of the attachment is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a functional block diagram of an embodiment of a circuit for detecting an amount of an attachment according to the present invention;
FIG. 2 is a schematic circuit diagram of another embodiment of the circuit for detecting the amount of the attached matter according to the present invention;
FIG. 3 is a schematic diagram of an embodiment of a sensor for detecting an amount of an attachment substance according to the present invention;
FIG. 4 is a schematic bottom view of the sensor of FIG. 3 for detecting the amount of the attachment;
FIG. 5 is a schematic cross-sectional view taken along line III-III of FIG. 4;
FIG. 6 is a schematic cross-sectional view taken along line IV-IV of FIG. 4;
FIG. 7 is a schematic view of a mounting seat of the sensor for detecting the amount of the attachment in FIG. 3;
FIG. 8 is a partially exploded view of the sensor of FIG. 3 for detecting the amount of the attachment;
FIG. 9 is a schematic view of the housing cover of FIG. 8;
FIG. 10 is a schematic view of the housing of FIG. 8;
FIG. 11 is a schematic structural diagram of the circuit board of FIG. 8;
fig. 12 is a schematic view of a scene in which the sensor for detecting the attachment quantity value in fig. 3 is applied to the range hood.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a circuit for detecting the magnitude of an attachment.
Referring to fig. 1 to 2, fig. 1 is a functional block diagram of an embodiment of a circuit for detecting an amount of an attachment according to the present invention; FIG. 2 is a schematic circuit diagram of another embodiment of the circuit for detecting the amount of the attached matter according to the present invention.
As shown in fig. 1, in the embodiment of the present invention, the circuit for detecting the amount of the attached matter includes a control circuit 10, an infrared transmitting circuit 20, an infrared receiving circuit 30, and a signal amplifying circuit 40; the control end of the control circuit 10 is connected with the controlled end of the infrared transmitting circuit 20, the feedback end of the control circuit 10 is connected with the output end of the signal amplifying circuit 40, and the input end of the signal amplifying circuit 40 is connected with the output end of the infrared receiving circuit 30; the infrared emission circuit 20 is configured to emit infrared rays to the attachment to be detected; the infrared receiving circuit 30 is configured to receive infrared rays reflected by the to-be-detected attachment and output an electrical signal corresponding to the intensity of the received infrared rays; the signal amplifying circuit 40 is configured to amplify the electrical signal output by the infrared receiving circuit 30, and transmit the amplified electrical signal to the control circuit 10; the control circuit 10 is configured to control the infrared emitting circuit 20 to operate and calculate the amount of the attachment to be detected according to the electrical signal output by the signal amplifying circuit 40.
The control circuit 10 is powered on, and the control circuit 10 controls the infrared emission circuit 20 to emit infrared rays to the attachment. Then, the infrared receiving circuit 30 receives the infrared ray reflected by the attached matter and outputs an electric signal corresponding to the amount of the attached matter to the signal amplifying circuit 40, and the signal amplifying circuit 40 amplifies the electric signal and outputs the amplified electric signal to the control circuit 10. The control circuit 10 compares the voltage value input by the feedback terminal with the pre-stored voltage value thereof to obtain the magnitude of the attachment.
It is understood that when infrared light is directed at a certain angle to a plane, a reflection phenomenon occurs. When there is no attachment on the plane, the diffuse reflection of the light is small, and the reflected light received by the infrared receiving circuit 30 is strong; when the surface has the attachments, the diffuse reflection of the light is large, and the reflected light received by the infrared receiving circuit 30 is weak. As the number of attachments increases, the reflected light received by the infrared receiving circuit 30 gradually decreases, and the signal output to the signal amplifying circuit 40 changes accordingly. Since the electrical signal output by the infrared receiving circuit 30 has a certain correspondence with the magnitude of the attached matter, the circuit for detecting the magnitude of the attached matter can accurately obtain the magnitude of the attached matter.
According to the technical scheme of the invention, the infrared transmitting circuit 20 is adopted to transmit infrared rays to the attachment to be detected, and the infrared receiving circuit 30 is adopted to receive the infrared rays reflected by the attachment and output electric signals with corresponding sizes, so that the control circuit 10 can accurately calculate the magnitude of the attachment to be detected according to the electric signals. In addition, the signal amplification circuit 40 is provided to amplify the electric signal outputted from the infrared receiving circuit 30 and transmit the amplified electric signal to the control circuit 10, thereby improving the sensitivity of the circuit for detecting the amount of the attached matter.
Preferably, the infrared emitting circuit 20 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first switch tube Q1, a first infrared emitting tube D1, and a second infrared emitting tube D2; a first end of the second resistor R2 is a controlled end of the infrared emission circuit 20, and a second end of the second resistor R2, a first end of the first resistor R1 and a controlled end of the first switch tube Q1 are interconnected; the second end of the first resistor R1 and the input end of the first switch Q1 are connected to a power supply (VCC as shown in fig. 2), and the output end of the first switch Q1, the first end of the third resistor R3 and the first end of the fourth resistor R4 are interconnected; the second end of the third resistor R3 is grounded GND through the first infrared transmitting tube D1, and the second end of the fourth resistor R4 is grounded GND through the second infrared transmitting tube D2. In this embodiment, the first infrared emission tube and the second infrared emission tube are both infrared emission diodes, an anode of the first infrared emission tube D1 is connected to the second end of the third resistor R3, and a cathode of the first infrared emission tube D1 is grounded to GND; the anode of the second infrared emission tube D2 is connected with the second end of the fourth resistor R4, and the cathode of the second infrared emission tube D2 is grounded GND. In addition, since the first switch transistor Q1 only functions as a switch in the circuit, the first switch transistor Q1 may be a transistor or a MOS transistor, and the specific type of the first switch transistor is not limited herein. In the following, the first switching tube is a PNP transistor as an example.
When the first end of the second resistor R2 receives a low level signal, the first switch Q1 is turned on, a current flows through the first infrared emitting tube D1 and the second infrared emitting tube D2, and the infrared emitting circuit 20 emits infrared rays to the attachment. When the first end of the second resistor R2 receives a high level signal, the first switch Q1 is turned off, no current flows through the first infrared emitting tube D1 and the second infrared emitting tube D2, and the infrared emitting circuit 20 does not operate. The third resistor R3 is used to control the magnitude of the current flowing through the first infrared emitting tube D1, and the fourth resistor R4 is used to control the magnitude of the current flowing through the second infrared emitting tube D2, and the intensity of the infrared rays emitted by the infrared emitting circuit 20 can be changed by changing the resistances of the third resistor R3 and the fourth resistor R4.
Preferably, the infrared receiving circuit 30 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an infrared receiving tube Q2; the input end of the infrared receiving tube Q2 is connected with a power supply (VCC shown in FIG. 2), and the output end of the infrared receiving tube Q2, the first end of the fifth resistor R5 and the first end of the sixth resistor R6 are interconnected; a second end of the sixth resistor R6 is connected to a first end of the seventh resistor R7, and a connection node between the sixth resistor R6 and the seventh resistor R7 is an output end of the infrared receiving circuit 30; a second terminal of the fifth resistor R5 and a second terminal of the seventh resistor R7 are grounded GND. In this embodiment, the infrared receiving tube Q2 is an infrared receiving triode.
When the infrared receiving tube Q2 receives an infrared signal, the infrared receiving tube Q2 is turned on, and the magnitude of the emitter current of the infrared receiving tube Q2 is proportional to the intensity of the infrared signal received by it. The emitter current of the infrared receiving tube Q2 generates a voltage drop across the fifth resistor R5, and the voltage is transmitted to the control circuit 10 through the sixth resistor R6 and the seventh resistor R7.
Preferably, the signal amplifying circuit 40 is a differential amplifying circuit, and the differential amplifying circuit includes an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and an operational amplifier U1; a first end of the eighth resistor R8 is connected to a power supply (VCC as shown in fig. 2), and a second end of the eighth resistor R8, a first end of the ninth resistor R9 and a first end of the tenth resistor R10 are interconnected; a second terminal of the tenth resistor R10, a first terminal of the eleventh resistor R11, and an inverting input terminal of the operational amplifier U1 are interconnected; a second end of the eleventh resistor R11 is connected to the output end of the operational amplifier U1, a connection node of the eleventh resistor R11 and the operational amplifier U1 is the output end of the differential amplifier circuit, and a common-direction input end of the operational amplifier U1 is the input end of the differential amplifier circuit.
It is easy to know that the voltage magnitude at the inverting input terminal of the operational amplifier U1 is Vf 5R9/(R8+ R9), and it is Vin that the voltage magnitude at the non-inverting input terminal of the operational amplifier U1 is; the voltage at the output of the operational amplifier U1 is Vout — R7(R10+ R11)/(R6+ R7) Vin- (R11/R10) Vf. If R11/R10 is equal to R7/R6, the output voltage of the operational amplifier U1 is Vout (Vin-Vf) R11/R10, and the amplification factor of the operational amplifier U1 is R11/R10.
Preferably, the control circuit 10 includes a control chip (such as the control chip shown in fig. 2) and a first capacitor C1; the input end IN of the control chip is a feedback end of the control circuit 10, and the control end CT of the control chip is a control end of the control circuit 10; the first end of the first capacitor C1 and the power supply end VCC of the control chip are connected with a power supply VCC, and the second end of the first capacitor C1 and the grounding end GND of the control chip are grounded GND. In this embodiment, the preferred model of the control chip is SC91F711, and the specific model is not limited herein.
Further, the circuit for detecting the attachment quantity value further comprises a communication interface 50, and the communication interface 50 is used for communication between the circuit for detecting the attachment quantity value and other devices. The communication interface 50 includes a first signal transmission terminal M1 for transmitting an external signal to the control circuit 10 and a second signal transmission terminal M2 for transmitting data information sent by the control circuit 10 to an external device. After the control circuit 10 knows the amount of the attached matter, the control circuit 10 sends the relevant data information to the user through the communication interface 50, wherein a display device may be disposed near the attached matter and electrically connected to the communication interface 50 to display the data information of the amount of the attached matter. Of course, the communication mode between the circuit for detecting the attachment amount value and other devices may be wireless communication or wired communication, so that the control circuit 10 may transmit the data information of the attachment amount value to the electronic devices such as a computer and a mobile phone of the user. Thereafter, the user can also inform the control circuit 10 that the user knows the magnitude of the attachment to be tested by sending feedback information to the control circuit 10.
The operation principle of the circuit for detecting the amount of the attached matter according to the present invention is described below with reference to fig. 1 and 2:
the control chip is powered on, a control end CT of the control chip outputs a low level signal to a controlled end of the first switch tube Q1, the first switch tube Q1 is conducted, current flows to the first infrared emission tube D1 through the third resistor R3 and flows to the second infrared emission tube D2 through the fourth resistor R4, and the first infrared emission tube D1 and the second infrared emission tube D2 emit infrared rays to attachments.
The infrared receiving tube Q2 receives the infrared ray reflected by the attachment, the current between the input end and the output end of the infrared receiving tube Q2 corresponds to the intensity of the received infrared ray, when the infrared ray is strong, the current is large, and when the infrared ray is weak, the current is small. Meanwhile, voltage drop is generated at two ends of the fifth resistor R5 and is transmitted to the non-inverting input end of the operational amplifier U1, the operational amplifier U1 amplifies the voltage by a certain multiple and outputs the amplified voltage to the input end IN of the control chip, and the control chip performs analog-to-digital conversion on the voltage signal to further improve the detection precision. Then, the control chip compares the voltage after the analog-to-digital conversion with a pre-stored voltage value to obtain the magnitude of the attachment corresponding to the magnitude of the voltage. Finally, the control chip transmits the data information of the attachment quantity value to the communication interface 50 through the twelfth resistor R12 and the thirteenth resistor R13, so that the communication interface 50 transmits the data information to a display device such as a mobile phone or a display screen to inform a user of the attachment quantity value.
The invention also provides a sensor for detecting the amount of the attachments, which comprises a shell 1, a mounting seat 2 and a light processing component (not marked); the optical processing assembly includes the lens 31 and the circuit for detecting the amount of the attached matter. The specific structure of the circuit for detecting the amount of the attached matter refers to the above embodiments, and since the sensor for detecting the amount of the attached matter adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
In the circuit for detecting the amount of the attached matter, the control circuit 10 and the signal amplification circuit 40 are disposed on the circuit board 32, and the first infrared transmitting tube D1, the second infrared transmitting tube D2, and the infrared receiving tube Q2 are electrically connected to the circuit board 32. For convenience of description, hereinafter, the first infrared emission tube D1 and the second infrared emission tube D2 are replaced with a light emitting element 33, and the infrared reception tube Q2 is replaced with a light receiving element 34.
One side of the lens 31 is provided with a light transmission surface 311, and the other side of the lens 31 is provided with an incident surface 312 and an exit surface 313. The light emitting element 33 is disposed toward the incident surface 312 and the light receiving element 34 is disposed toward the exit surface 313. The circuit board 32 is used for controlling the light emitting element 33 to emit light, receiving the light sensing amount signal of the light receiving element 33, and determining the attachment of the attachment on the light transmission surface 311 according to the light sensing amount signal.
The light processing assembly and the mounting base 2 are both located in the housing 1, the light emitting element 33, the light receiving element 34 and the lens 31 are fixed on the mounting base 2, the housing 1 is provided with a window 111, and a light-transmitting surface 311 of the lens 31 is exposed out of the window 111.
In this embodiment, the lens 31 is made of a transparent material, so that light can propagate inside the lens 31. Specifically, the incident surface 312 is connected to the periphery of the emitting surface 313, and the emitting surface 313 and the incident surface 312 surround one side of the light transmitting surface 311 to form a trapezoid or polyhedron boss. The outer side of the light-transmitting surface 311 is a sampling surface of the attached matter, and the change of the amount of the attached matter at the light-transmitting surface 311 is related to the change of the amount of the light emitted at the light-emitting surface 313.
After the optical processing assembly is engaged with the mounting base 2, the optical processing assembly can be installed into the housing 1 through a window 111 or other opening structure formed on the housing 1. The mounting base 2 is at least used for fixing the light emitting element 33, the light receiving element 34 and the lens 31, and corresponding fixing structures are arranged on the mounting base, and the housing 1 is mainly used for preventing ambient light from entering the lens 31 or directly entering the light receiving element 34, namely, noise is generated to influence the detection precision. In addition, the housing may shield the components therein.
In operation, the light receiving element 34 receives the light reflected by the attachment and outputs an electrical signal corresponding to the intensity of the light to the signal amplification circuit, and the control circuit analyzes the amplified electrical signal to obtain the attachment magnitude.
The sensor for detecting the amount of the attachments is characterized in that the light emitting element 33, the light receiving element 34 and the lens 31 are fixed on the mounting base 2, and then the mounting base can be sleeved with the shell, so that the moving space of the light emitting element 33, the light receiving element 34 and the lens 31 is large during assembly, the operation is convenient, the interference with other parts is not easy to occur, and simultaneously, the alignment of each optical element with the mounting base 2 is facilitated, so that the mutual position precision of each optical element is ensured, and the detection precision of the sensor is further ensured.
Further, one end of the mount 2 is provided with a recess 20 accommodating the lens 31, and the other end of the mount 22 is fixed to the housing 1.
In this embodiment, the fixing of the mounting base 2 to the housing 1 can prevent the mounting base 2 from shaking relative to the housing 1, and the concave portion 20 provided on the mounting base 2 can limit the position of the lens 31 to prevent the lens 31 from shaking relative to the mounting base 2; meanwhile, the inner wall surface of the recess 20 may shield the lens 31 from light except for the light transmission surface 311.
Further, the mounting base 2 includes a first base 21 and a second base 22, which are opposite and detachably fixed, the first base 21 has a first mating surface (not shown) facing the second base 22, and the second base 22 has a second mating surface (not shown) facing the first base 21 and attached to the first mating surface.
The recess 20 is formed between the first seat 21 and the second seat 22. The first base 21 and the second base 22 are both provided with a limiting hole 211, and the circumferential surface of the lens 31 is provided with a stopping protrusion 314 adapted to the limiting hole 211.
In this embodiment, the mount 2 is configured to clamp the lens 31 through the first seat 21 and the second seat 22, specifically, the limiting hole 211 can be conveniently sleeved on the stopping protrusion 314 on the lens 31, and the lens 31 is prevented from falling off from the mount 2 by using the matching relationship.
Further, the light emitting element 33 and the light receiving element 34 are disposed between the first seat 21 and the second seat 22.
In the embodiment, the light processing module including the light emitting element 33 and the light receiving element 34 can be fixed by fixing the first seat 21 and the second seat 22, and the fixing structure is simpler than that for fixing each component in the light processing module with the fixing seat respectively.
Furthermore, a screw hole column 113 extending along the depth direction of the housing 1 is arranged on the peripheral wall surface of the cavity of the housing 1, a screw hole (not marked) is arranged at one end of the screw hole column 113 departing from the window 111, a lug 212 is arranged on the peripheral surface of the mounting base 2, and a fixing hole (not marked) matched with the screw hole is arranged on the lug 212.
In this embodiment, during the assembly, after mount pad 2 assembles to casing 1, and the screw on fixed orifices and the screw post 113 aligns, the screw passes the fixed orifices, and the screw in screw accomplishes the fixed between mount pad 2 and the casing 1 promptly, the simple operation, and fixed strength is high.
Further, referring to fig. 6 and 9, in an embodiment, the circuit board 32 is a rectangular board, a first notch 321 and a second notch 322 are formed on the circuit board 32 at intervals, and the first notch 321 and the second notch 322 are both located at a corner of the circuit board 32; the corner of the circuit board 32 is provided with a first notch 321 and a second notch 322, the first notch 321 is used for avoiding a screw matched with the screw hole, and the second notch 322 is used for matching with the screw hole to fix the circuit board 32.
In this embodiment, specifically, the circuit board 32 is a rectangular board, two first notches 321 and one second notch 322 are disposed at the corners of the rectangular board, and the fixing structure, such as the second notch 322, and the avoiding structure, such as the first notch 321, are disposed at the corners of the circuit board 32, so that a continuous area can be formed in the middle of the circuit board 32, which is beneficial to the internal wiring of the circuit board 32 and facilitates the layout design of the circuit board 32.
Further, referring to fig. 9 and 10, in an embodiment, the housing 1 includes a housing 11 with two open ends and a housing cover 12 located at one end of the housing 11, an opening 112 for the light processing assembly to be installed is formed at one end of the housing 11, a window 111 is formed at the other end, and the housing 11 and the housing cover 12 are detachably fixed at the opening 112.
In this embodiment, during assembly, the light processing assembly and the mounting base 2 are first assembled, then the assembly is assembled into the housing 11 from the opening 112, and finally the housing cover 12 is locked to the housing 11 corresponding to the opening 112 of the housing 11. Preferably, the size of the window 111 may be slightly smaller than the size of the light-transmitting surface 311 of the lens 31 to abut against the lens 31 with the inner wall surface of the edge of the window 111 and to limit the lens 31.
Further, the edge of the shell body 11 near one end of the shell cover 12 is provided with a plurality of buckles 114, the shell cover 12 includes a cover plate 121 and an annular enclosing plate 122 protruding on the inner side surface of the cover plate 121, the end portion of the annular enclosing plate 122 is embedded in the shell body 11, the annular enclosing plate 122 is located between the plurality of buckles 114, and the edge portion of the protruding annular enclosing plate 122 of the cover plate 121 is provided with a clamping hole 123 adapted to the buckle 114.
In this embodiment, the locking between the housing cover 12 and the housing body 11 mainly has the functions of shielding light and locking, and is fixed by the snap 114 and the snap hole 123, which is beneficial to simplifying the assembly.
Further, referring to fig. 3 to 6 and fig. 8, in an embodiment, in order to fix the sensor for detecting the amount of the attachment to an upper computer (e.g., a range hood), the sensor for detecting the amount of the attachment further includes a fixing frame 4, the fixing frame 4 includes a fixing plate 41 and a frame 42 connected to the fixing plate 41, a mounting hole (not labeled) is formed in the fixing plate 41, and the frame 42 surrounds the window 111 and is fixedly connected to the housing 1.
In this embodiment, the screw passes the mounting hole, and the screw that corresponds the setting on the screw in host computer if lampblack absorber can be fixed this sensor on the host computer. Preferably, the fixing frame 4 is perpendicular to the frame 42, the number of the mounting holes is two, and the frame 42 is locked to the edge of the window 111 by screws.
Referring to fig. 12, the present invention further provides a range hood, in an embodiment, the range hood 100 includes a sensor for detecting an attachment amount value, and the specific structure of the sensor 101 for detecting an attachment amount value refers to the above embodiments, and since the range hood adopts all technical solutions of all embodiments of the sensor 101 for detecting an attachment amount value, the range hood at least has all beneficial effects brought by the technical solution of the embodiment of the sensor 101 for detecting an attachment amount value, and details are not repeated herein.
Wherein, culinary art workstation 200 is located the below of lampblack absorber 100, and lampblack absorber 100 is including detecting sensor 101, display module 102 and the voice prompt module 103 of attachment magnitude, and wherein, the sensor 101 of detecting the attachment magnitude is installed in the inside of lampblack absorber 100, and at least lens 1's printing opacity face 11 exposes in the inner chamber of lampblack absorber or in the wind channel of discharging fume. The display module 102 displays the detected amount of the attachments, for example, the amount of the attachments remaining on the lens 1 after the range hood is cleaned. The voice prompt module 103 is used for reminding a user to start a cleaning program of the range hood 100 when the magnitude of the detected attachments reaches a threshold value. The threshold value can be set by a user, and can also be set when the range hood leaves a factory, and the threshold value is not limited here.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A sensor for detecting the magnitude of an attachment is characterized by comprising a shell, a mounting seat and a light processing component; wherein the light processing component comprises a lens and a circuit for detecting the magnitude of the attachment;
the circuit for detecting the magnitude of the attachment comprises a control circuit, an infrared transmitting circuit, an infrared receiving circuit and a signal amplifying circuit; the control end of the control circuit is connected with the controlled end of the infrared transmitting circuit, the feedback end of the control circuit is connected with the output end of the signal amplifying circuit, and the input end of the signal amplifying circuit is connected with the output end of the infrared receiving circuit; wherein the content of the first and second substances,
the infrared emission circuit is used for emitting infrared rays to the attachment to be detected;
the infrared receiving circuit is used for receiving the infrared rays reflected by the attachment to be detected and outputting an electric signal corresponding to the intensity of the received infrared rays;
the signal amplification circuit is used for amplifying the electric signal output by the infrared receiving circuit and transmitting the electric signal to the control circuit;
the control circuit is used for controlling the infrared emission circuit to work and calculating the amount of the attachment to be detected according to the electric signal output by the signal amplification circuit;
one side of the lens is provided with a light transmitting surface, and the other side of the lens is provided with an incident surface and an emergent surface;
the infrared emission circuit comprises a first infrared emission tube and a second infrared emission tube, and the first infrared emission tube and the second infrared emission tube are light emission pieces;
the infrared receiving circuit comprises an infrared receiving tube, and the infrared receiving tube is a light receiving part;
the light emitting piece is arranged towards the incident surface in an angled mode, and the light receiving piece is arranged towards the emergent surface in an angled mode;
the reflected light received by the infrared receiving circuit is weakened along with the increase of the attachments, and the signal output to the signal amplifying circuit is also reduced.
2. The sensor for detecting an attachment quantity according to claim 1, wherein the infrared emission circuit further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch tube, a first infrared emission tube and a second infrared emission tube; the first end of the second resistor is a controlled end of the infrared emission circuit, and the second end of the second resistor, the first end of the first resistor and the controlled end of the first switching tube are interconnected; the second end of the first resistor and the input end of the first switch tube are connected with a power supply, and the output end of the first switch tube, the first end of the third resistor and the first end of the fourth resistor are interconnected; the second end of the third resistor is grounded through the first infrared transmitting tube, and the second end of the fourth resistor is grounded through the second infrared transmitting tube.
3. The sensor for detecting an attachment quantity according to claim 1, wherein the infrared receiving circuit further includes a fifth resistor, a sixth resistor, a seventh resistor; the input end of the infrared receiving tube is connected with a power supply, and the output end of the infrared receiving tube, the first end of the fifth resistor and the first end of the sixth resistor are interconnected; a second end of the sixth resistor is connected with a first end of the seventh resistor, and a connection node of the sixth resistor and the seventh resistor is an output end of the infrared receiving circuit; a second terminal of the fifth resistor and a second terminal of the seventh resistor are grounded.
4. The sensor for detecting an amount of an attached matter according to claim 1, wherein the signal amplification circuit is a differential amplification circuit.
5. The sensor for detecting an amount of an additive according to claim 4, wherein the differential amplifier circuit includes an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and an operational amplifier; a first end of the eighth resistor is connected with a power supply, and a second end of the eighth resistor, a first end of the ninth resistor and a first end of the tenth resistor are interconnected; a second end of the tenth resistor, a first end of the eleventh resistor and an inverting input end of the operational amplifier are interconnected; the second end of the eleventh resistor is connected to the output end of the operational amplifier, the connection node of the eleventh resistor and the operational amplifier is the output end of the differential amplification circuit, and the homodromous input end of the operational amplifier is the input end of the differential amplification circuit.
6. The sensor for detecting an amount of an attached matter according to claim 1, wherein the control circuit includes a control chip and a first capacitor; the input end of the control chip is the feedback end of the control circuit, and the control end of the control chip is the control end of the control circuit; the first end of the first capacitor and the power end of the control chip are connected with a power supply, and the second end of the first capacitor and the grounding end of the control chip are grounded.
7. The sensor according to any one of claims 1 to 6, wherein the circuit for detecting an amount of the attachment further comprises a communication interface for communication between the circuit for detecting an amount of the attachment and another device.
8. The sensor for detecting an attachment quantity according to claim 7, wherein the circuit for detecting an attachment quantity communicates with other devices by wireless communication or wired communication.
9. A range hood, characterized by comprising a sensor for detecting an amount of an attached matter according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610196103.9A CN105891158B (en) | 2016-03-30 | 2016-03-30 | Circuit for detecting attachment magnitude, sensor and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610196103.9A CN105891158B (en) | 2016-03-30 | 2016-03-30 | Circuit for detecting attachment magnitude, sensor and range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105891158A CN105891158A (en) | 2016-08-24 |
| CN105891158B true CN105891158B (en) | 2020-03-06 |
Family
ID=57014256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610196103.9A Active CN105891158B (en) | 2016-03-30 | 2016-03-30 | Circuit for detecting attachment magnitude, sensor and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105891158B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975851B (en) * | 2018-01-02 | 2020-02-04 | 广东美的厨房电器制造有限公司 | Range hood and cleaning control method thereof |
| CN110207210A (en) * | 2018-09-06 | 2019-09-06 | 华帝股份有限公司 | Detection circuit for detecting oil stain state of range hood and detection method thereof |
| CN109611909B (en) * | 2018-11-09 | 2020-11-06 | 华帝股份有限公司 | Cleaning control method of range hood |
| CN112283775B (en) * | 2020-10-28 | 2022-03-15 | 珠海格力电器股份有限公司 | Range hood, range hood cleaning method and device and storage medium |
| CN112393305A (en) * | 2020-12-10 | 2021-02-23 | 珠海格力电器股份有限公司 | Equipment cleaning prompting method and device and range hood |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201993476U (en) * | 2011-01-06 | 2011-09-28 | 成都虹岳科技有限公司 | Lens pollution detection device and road condition detector |
| CN202866445U (en) * | 2012-07-10 | 2013-04-10 | 海南师范大学 | Control circuit for bicycle electronic remote-control lock |
| CN103166583A (en) * | 2011-12-09 | 2013-06-19 | 川崎微电子股份有限公司 | Linear amplifier that perform level shift and method of level shifting |
| CN103680114A (en) * | 2012-09-11 | 2014-03-26 | 深圳市祈飞科技有限公司 | Startup and shutdown system employing remote infrared control and computer |
| CN204375154U (en) * | 2014-12-29 | 2015-06-03 | 漳州科能电器有限公司 | A kind of infrared transmitting circuit |
| CN105259587A (en) * | 2015-10-10 | 2016-01-20 | 深圳市威京利电子有限公司 | Output detection system of infrared induction strip and method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI287200B (en) * | 2005-08-16 | 2007-09-21 | Kye Systems Corp | Safety control equipment of optical mouse, and method thereby |
| TWI447507B (en) * | 2009-06-30 | 2014-08-01 | Qisda Corp | Projector |
-
2016
- 2016-03-30 CN CN201610196103.9A patent/CN105891158B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201993476U (en) * | 2011-01-06 | 2011-09-28 | 成都虹岳科技有限公司 | Lens pollution detection device and road condition detector |
| CN103166583A (en) * | 2011-12-09 | 2013-06-19 | 川崎微电子股份有限公司 | Linear amplifier that perform level shift and method of level shifting |
| CN202866445U (en) * | 2012-07-10 | 2013-04-10 | 海南师范大学 | Control circuit for bicycle electronic remote-control lock |
| CN103680114A (en) * | 2012-09-11 | 2014-03-26 | 深圳市祈飞科技有限公司 | Startup and shutdown system employing remote infrared control and computer |
| CN204375154U (en) * | 2014-12-29 | 2015-06-03 | 漳州科能电器有限公司 | A kind of infrared transmitting circuit |
| CN105259587A (en) * | 2015-10-10 | 2016-01-20 | 深圳市威京利电子有限公司 | Output detection system of infrared induction strip and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105891158A (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105891158B (en) | Circuit for detecting attachment magnitude, sensor and range hood | |
| EP2614494B1 (en) | Detector assembly with removable detecting module | |
| JPS6147537A (en) | Detector for droplet agent | |
| JP2012066806A (en) | Sensor arrangement for acquiring state variable | |
| US20050218351A1 (en) | Meter capable of measuring ambient dust concentration | |
| JPH05157690A (en) | Photoelectric smoke detector | |
| US20120217984A1 (en) | Resistance-measuring circuit and electronic device using the same | |
| EP3139146B1 (en) | Physical quantity measuring device | |
| KR20190037428A (en) | Vehicle's indoor temperature sensor | |
| JP5308192B2 (en) | Photoelectric sensor | |
| GB2267963A (en) | Obscuration sensor | |
| CN210090655U (en) | Point inspection conduction pen | |
| CN211849801U (en) | Infrared laser induction system and intelligent closestool thereof | |
| CN105806809B (en) | For detecting the sensor and household electrical appliance of attachment magnitude | |
| CN212904486U (en) | Fluid monitoring device | |
| CN216956393U (en) | Correlation type photoelectric sensor | |
| CN217083966U (en) | Anti-interference intelligent temperature measuring instrument | |
| CN215812987U (en) | Input socket module for meter pen and universal meter | |
| CN210780897U (en) | Electronic equipment | |
| CN212621137U (en) | Self-service thermoscope with lens cone | |
| CN220820238U (en) | Laser distance measuring device | |
| CN217179665U (en) | Heat radiation structure and environment detector | |
| CN219810920U (en) | Formaldehyde detection device | |
| CN214380854U (en) | Background suppression photoelectric sensing device | |
| JPH08122252A (en) | Dust sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |