Infrared induction distance self-adaptive adjustment method and device and electrical equipment

Abstract

The invention discloses an infrared induction distance adaptive adjustment method and device and electrical equipment, and relates to the technical field of infrared induction distance adjustment. The method comprises the steps that the signal intensity of infrared signals emitted by an infrared emission unit is controlled to be sequentially increased from small to large, and an obstacle is arranged at the position, with the preset distance, of the front side of the infrared emission unit in advance; and if it is detected that an infrared receiving unit receives the infrared signal reflected by the obstacle, acquiring the signal strength of the infrared signal emitted by the infrared emission unit as the target signal strength. The signal intensity of the infrared emission unit is gradually increased, the corresponding target signal intensity when the infrared induction unit just can induct the infrared signal is obtained, and the target signal intensity is the minimum signal intensity required for reaching the set induction distance; and as a potentiometer and a standard infrared module are not needed to adjust the infrared induction distance, the cost is low.

Description

Technical Field

[0001] The present invention relates to the field of infrared sensing distance adjustment technology, and in particular to an infrared sensing distance adaptive adjustment method, device and electrical equipment. Background Art

[0002] The infrared sensing distance function is used in many electrical products, but the specific methods are different and varied.

[0003] If a more precise sensing distance is required, a standard infrared transmitting sensing module is usually used, but the cost of a standard infrared transmitting sensing module is very expensive.

[0004] If the accuracy of the sensing distance is not very high, discrete common infrared transmitting tubes and infrared receiving tubes are generally used for design. However, due to the difference in discrete component parameters and other factors, the sensing distance deviation will be large. Therefore, the sensing distance is adjusted by adding a potentiometer to control the strength of the infrared transmitting signal, and the sensing distance meets the design requirements. However, adding a potentiometer also increases the cost. Summary of the invention

[0005] The embodiments of the present invention provide an infrared sensing distance adaptive adjustment method, device and electrical equipment, aiming to solve the technical problem of high cost of existing infrared sensing distance adjustment solutions.

[0006] In a first aspect, an embodiment of the present invention provides a method for adaptively adjusting an infrared sensing distance, which includes:

[0007] Controlling the signal strength of the infrared signal emitted by the infrared emitting unit to increase from small to large, wherein an obstacle is pre-arranged at a preset distance in front of the infrared emitting unit;

[0008] If it is detected that the infrared receiving unit receives the infrared signal reflected by the obstacle, the signal strength of the infrared signal emitted by the infrared emitting unit is obtained as the target signal strength.

[0009] A further technical solution is that the method further comprises:

[0010] storing the target signal strength;

[0011] When an obstacle is detected, the infrared emitting unit is controlled to emit an infrared signal based on the target signal strength.

[0012] A further technical solution is that the method further comprises:

[0013] Determine whether an infrared sensing distance adjustment instruction is received;

[0014] If an infrared sensing distance adjustment instruction is received, the step of controlling the signal strength of the infrared signal emitted by the infrared emitting unit to increase from small to large is executed.

[0015] In a second aspect, an embodiment of the present invention further provides an infrared sensing device, which is used to execute the infrared sensing distance adaptive adjustment method as described in the first aspect, and the infrared sensing device includes a control unit, a switch unit, an infrared transmitting unit and an infrared receiving unit; the control unit is connected to the switch unit, the switch unit is connected to the infrared transmitting unit, and the infrared receiving unit is connected to the control unit.

[0016] A further technical solution is that the switch unit includes a transistor, a base of the transistor is connected to the control unit, a collector of the transistor is connected to the infrared emitting unit, and an emitter of the transistor is grounded.

[0017] A further technical solution is that the switch unit further includes a first resistor, and the first resistor is respectively connected to the base of the transistor and the emitter of the transistor.

[0018] A further technical solution is that the infrared emitting unit includes an infrared emitting tube and a second resistor, the positive electrode of the infrared emitting tube is connected to the voltage source through the second resistor, and the negative electrode of the infrared emitting tube is connected to the collector of the transistor.

[0019] Its further technical solution is that the infrared receiving unit includes an infrared receiving tube, a third resistor, a fourth resistor and a fifth resistor; the power supply end of the infrared receiving tube is connected to the voltage source through the third resistor, the output end of the infrared receiving tube is connected to the fourth resistor, the fourth resistor is connected to the fifth resistor, and the fifth resistor is connected to the control unit.

[0020] A further technical solution is that the infrared sensing device also includes a first capacitor, a second capacitor and a third capacitor, the first capacitor is connected to the third resistor and is grounded, the second capacitor is connected to the power supply end of the infrared receiving tube and is grounded; the third capacitor is connected to the fourth resistor and is grounded.

[0021] In a third aspect, an embodiment of the present invention further provides an electrical device, wherein the electrical device includes the infrared sensing device as described in the second aspect.

[0022] The embodiment of the present invention provides a method, device and electrical equipment for adaptively adjusting infrared sensing distance. The method includes: controlling the signal strength of the infrared signal emitted by the infrared emitting unit to increase from small to large, wherein an obstacle is pre-set at a preset distance in front of the infrared emitting unit; if it is detected that the infrared receiving unit receives the infrared signal reflected by the obstacle, the signal strength of the infrared signal emitted by the infrared emitting unit is obtained as the target signal strength. The above-mentioned preset distance is the sensing distance that needs to be set, and by gradually increasing the signal strength of the infrared emitting unit and obtaining the target signal strength corresponding to when the infrared sensing unit can just sense the infrared signal, the target signal strength is the minimum signal strength required to achieve the above-mentioned set sensing distance. Subsequently, the infrared emitting unit is controlled to work based on the target signal strength, so as to ensure that the sensing distance meets the user's needs, thereby completing the configuration of the sensing distance; since there is no need to use a potentiometer or a standard infrared module to adjust the infrared sensing distance, the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of a flow chart of an infrared sensing distance adaptive adjustment method provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of an application scenario of an infrared sensing distance adaptive adjustment method provided by an embodiment of the present invention;

[0026] Figure 3 A structural block diagram of an infrared sensing device provided by an embodiment of the present invention;

[0027] Figure 4 A circuit diagram of an infrared sensing device provided by an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Electrical device 100, obstacle 200, control unit 10, switch unit 20, infrared emitting unit 30, infrared receiving unit 40, transistor Q1, first resistor R6, infrared emitting tube D1, second resistor R3, infrared receiving tube D2, third resistor R5, fourth resistor R8, fifth resistor R7, first capacitor C1, second capacitor C2 and third capacitor C3. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0032] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0033] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0034] As used in this specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0035] See also Figure 1 , an embodiment of the present invention provides an infrared sensing distance adaptive adjustment method, such as Figure 1 As shown, the method comprises the following steps:

[0036] S1, controlling the signal strength of the infrared signal emitted by the infrared emitting unit to increase from small to large, wherein an obstacle is pre-arranged at a preset distance in front of the infrared emitting unit.

[0037] In a specific implementation, the infrared emitting unit can be configured on an electrical device, such as an electric heater. Figure 2First, an obstacle 200 is set at the front side of the electrical device 100 (the front side of the infrared emitting unit emitting direction). The distance between the obstacle 200 and the electrical device 100 (i.e., the infrared emitting unit) is a preset distance, which is set by the user and is the sensing distance that needs to be set.

[0038] During specific operation, the signal strength of the infrared signal emitted by the infrared emitting unit is controlled to increase from small to large, for example, it can increase at a uniform speed, that is, increase by a preset value every second.

[0039] In one implementation, before step S1, it is first determined whether to enter the sensing distance setting mode. Specifically, after power is turned on, it is determined whether an infrared sensing distance adjustment instruction is received; if an infrared sensing distance adjustment instruction is received, the above step S1 is executed.

[0040] Specifically, the infrared sensing distance adjustment instruction may be a combination key signal input by a user, which is not specifically limited in the present invention.

[0041] S2: If it is detected that the infrared receiving unit receives the infrared signal reflected by the obstacle, the signal strength of the infrared signal emitted by the infrared emitting unit is obtained as the target signal strength.

[0042] In a specific implementation, during the execution of step S1, that is, during the process in which the infrared signal emitted by the infrared emitting unit gradually increases, it is determined in real time whether the sensing signal sent by the infrared receiving unit is received. If the sensing signal sent by the infrared unit is received, it means that the infrared receiving unit receives the infrared signal reflected by the obstacle. At this time, the signal strength of the infrared signal emitted by the infrared emitting unit is obtained as the target signal strength. It should be noted that the target signal strength can be specifically the duty cycle of the PWM signal that drives the infrared emitting unit to work. The target signal strength is the minimum signal strength required to achieve the above-set sensing distance.

[0043] Furthermore, the target signal strength is stored; and when an obstacle is detected, the infrared transmitting unit is controlled to transmit an infrared signal based on the target signal strength.

[0044] Specifically, the target signal strength can be stored in the FLASH memory, and when an obstacle is detected later, the infrared emitting unit is controlled to emit an infrared signal based on the target signal strength. That is, the signal strength of the infrared emitting unit can be set to the target signal strength, or set slightly larger than the target signal strength, for example, 5% larger, so as to ensure that the sensing distance is the preset distance set above.

[0045] The technical solution of the embodiment of the present invention proposes a method for adaptively adjusting infrared sensing distance, which includes: controlling the signal strength of the infrared signal emitted by the infrared emitting unit to increase from small to large, wherein an obstacle is pre-set at a preset distance in front of the infrared emitting unit; if it is detected that the infrared receiving unit receives the infrared signal reflected by the obstacle, the signal strength of the infrared signal emitted by the infrared emitting unit is obtained as the target signal strength. The above-mentioned preset distance is the sensing distance that needs to be set, and by gradually increasing the signal strength of the infrared emitting unit and obtaining the target signal strength corresponding to when the infrared sensing unit can just sense the infrared signal, the target signal strength is the minimum signal strength required to achieve the above-mentioned set sensing distance. Subsequently, the infrared emitting unit is controlled to work based on the target signal strength, so as to ensure that the sensing distance meets the user's needs, thereby completing the configuration of the sensing distance; since there is no need to use a potentiometer or a standard infrared module to adjust the infrared sensing distance, the cost is low.

[0046] The embodiment of the present invention provides an infrared sensing device, which is used to perform the infrared sensing distance adaptive adjustment method provided in any of the above embodiments, and the infrared sensing device includes a control unit 10, a switch unit 20, an infrared transmitting unit 30 and an infrared receiving unit 40; the control unit 10 is connected to the switch unit 20, the switch unit 20 is connected to the infrared transmitting unit 30, and the infrared receiving unit 40 is connected to the control unit 10. Specifically, the infrared sensing distance adaptive adjustment method is applied to the control unit 10, and the control unit 10 can be specifically an MCU (microcontroller), which is not specifically limited by the present invention.

[0047] Further, in some embodiments, such as the present embodiment, the switching unit 20 includes a transistor Q1 and a first resistor R6, the base of the transistor Q1 is connected to the control unit 10, the collector of the transistor Q1 is connected to the infrared emitting unit 30, and the emitter of the transistor Q1 is grounded; the first resistor R6 is respectively connected to the base of the transistor Q1 and the emitter of the transistor Q1.

[0048] Specifically, the control unit 10 controls the intensity of the infrared signal of the infrared emitting unit 30 through the transistor Q1. Specifically, the control unit 10 sends a PWM signal to the transistor Q1, and adjusts the intensity of the infrared signal of the infrared emitting unit 30 by adjusting the duty cycle of the PWM signal.

[0049] Furthermore, the infrared emitting unit 30 includes an infrared emitting tube D1 and a second resistor R3, the positive electrode of the infrared emitting tube D1 is connected to the voltage source through the second resistor R3, and the negative electrode of the infrared emitting tube D1 is connected to the collector of the transistor Q1.

[0050] Specifically, the voltage source is used to supply power to the infrared emitting unit 30, for example, to provide a voltage of 5 V. The second resistor R3 plays a role of current limiting to improve the safety of the circuit.

[0051] Furthermore, the infrared receiving unit 40 includes an infrared receiving tube D2, a third resistor R5, a fourth resistor R8 and a fifth resistor R7; the power supply end of the infrared receiving tube D2 is connected to the voltage source through the third resistor R5, the output end of the infrared receiving tube D2 is connected to the fourth resistor R8, the fourth resistor R8 is connected to the fifth resistor R7, and the fifth resistor R7 is connected to the control unit 10.

[0052] Specifically, the voltage source is used to power the infrared receiving unit 40, for example, to provide a 5V voltage. The third resistor R5, the fourth resistor R8 and the fifth resistor R7 play a current limiting role to improve the safety of the circuit. Furthermore, the infrared receiving tube D2 also includes a grounding terminal for grounding.

[0053] Furthermore, the infrared sensing device also includes a first capacitor C1, a second capacitor C2 and a third capacitor C3, the first capacitor C1 is connected to the third resistor R5 and is grounded, the second capacitor C2 is connected to the power supply end of the infrared receiving tube D2 and is grounded; the third capacitor C3 is connected to the fourth resistor R8 and is grounded.

[0054] The first capacitor C1, the second capacitor C2 and the third capacitor C3 play a filtering role, and are used to filter out clutter in the circuit, thereby improving the stability of the circuit.

[0055] An embodiment of the present invention provides an electrical device, and the electrical device includes the infrared sensing device provided by any of the above embodiments.

[0056] The electrical device may specifically be an electric heater, which is not specifically limited in the present invention.

[0057] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0058] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of each unit is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0059] The steps in the method of the embodiment of the present invention can be adjusted in order, combined and deleted according to actual needs. The units in the device of the embodiment of the present invention can be combined, divided and deleted according to actual needs. In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0060] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, terminal, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention.

[0061] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0062] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0063] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for adaptively adjusting infrared sensing distance, characterized in that: include: Controlling the signal strength of the infrared signal emitted by the infrared emitting unit to increase from small to large, wherein an obstacle is pre-arranged at a preset distance in front of the infrared emitting unit; If it is detected that the infrared receiving unit receives the infrared signal reflected by the obstacle, the signal strength of the infrared signal emitted by the infrared emitting unit is obtained as the target signal strength.

2. The infrared sensing distance adaptive adjustment method according to claim 1, characterized in that: The method further comprises: storing the target signal strength; When an obstacle is detected, the infrared emitting unit is controlled to emit an infrared signal based on the target signal strength.

3. The infrared sensing distance adaptive adjustment method according to claim 1, characterized in that: The method further comprises: Determine whether an infrared sensing distance adjustment instruction is received; If an infrared sensing distance adjustment instruction is received, the step of controlling the signal strength of the infrared signal emitted by the infrared emitting unit to increase from small to large is executed.

4. An infrared sensing device, characterized in that: Used to execute the infrared sensing distance adaptive adjustment method as described in any one of claims 1 to 3, the infrared sensing device includes a control unit, a switch unit, an infrared transmitting unit and an infrared receiving unit; the control unit is connected to the switch unit, the switch unit is connected to the infrared transmitting unit, and the infrared receiving unit is connected to the control unit.

5. The infrared sensing device according to claim 4, characterized in that: The switch unit comprises a transistor, a base of the transistor is connected to the control unit, a collector of the transistor is connected to the infrared emitting unit, and an emitter of the transistor is grounded.

6. The infrared sensing device according to claim 5, characterized in that: The switch unit further includes a first resistor, which is respectively connected to the base of the transistor and the emitter of the transistor.

7. The infrared sensing device according to claim 5, characterized in that: The infrared emitting unit comprises an infrared emitting tube and a second resistor, the positive electrode of the infrared emitting tube is connected to the voltage source through the second resistor, and the negative electrode of the infrared emitting tube is connected to the collector of the transistor.

8. The infrared sensing device according to claim 7, characterized in that: The infrared receiving unit includes an infrared receiving tube, a third resistor, a fourth resistor and a fifth resistor; the power supply end of the infrared receiving tube is connected to the voltage source through the third resistor, the output end of the infrared receiving tube is connected to the fourth resistor, the fourth resistor is connected to the fifth resistor, and the fifth resistor is connected to the control unit.

9. The infrared sensing device according to claim 8, characterized in that: The infrared sensing device also includes a first capacitor, a second capacitor and a third capacitor. The first capacitor is connected to the third resistor and is grounded. The second capacitor is connected to the power supply end of the infrared receiving tube and is grounded. The third capacitor is connected to the fourth resistor and is grounded.

10. An electrical device, characterized in that: Comprising the infrared sensing device as described in any one of claims 4-9.

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