CN112260672B - Method for adjusting induction distance of infrared device - Google Patents
Method for adjusting induction distance of infrared device Download PDFInfo
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- CN112260672B CN112260672B CN202011120719.0A CN202011120719A CN112260672B CN 112260672 B CN112260672 B CN 112260672B CN 202011120719 A CN202011120719 A CN 202011120719A CN 112260672 B CN112260672 B CN 112260672B
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- 230000006698 induction Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 230000009471 action Effects 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000012216 screening Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 description 13
- 230000007613 environmental effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
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Abstract
The invention discloses a method for adjusting the induction distance of an infrared device, which comprises the following steps: s1: acquiring a maximum AD value and a minimum AD value detected by the induction module in a preset time; s2: and judging whether the difference value between the maximum AD value and the minimum AD value is smaller than a first preset value, if so, resetting the reference AD value of the detection reference surface, and if not, judging that the operation is an effective operation. In the invention, whether the infrared light obtained by the sensing module at the current time is derived from the environment is judged by comparing the first preset value with the difference value between the maximum AD value and the minimum AD value obtained in the preset time, if so, the reference AD value of the detection reference surface is reset, and if not, the detection is carried out again; comparing the detected instant AD value with a reference AD value to judge whether the action is effective, if so, judging that the action is effective, and if not, re-detecting; thereby achieving the functions of self-adapting environment and avoiding misjudgment.
Description
Technical Field
The invention relates to the field of electronics, in particular to an adjusting method for an induction distance of an infrared device.
Background
When a large number of products are used in the market to realize application scenes such as entrance guard, tap switch, wall switch, temperature measuring box and the like by using an infrared diode sensing circuit, a singlechip is used for detecting the high and low levels of a receiving tube to make judgment. Therefore, the distance is limited, so that the infrared receiving component is required to be lowered to a certain level, more light waves of the infrared emitting component are required to be obtained by the infrared receiving component, and the shielding object is required to be within a short distance. However, both the infrared transmitting assembly and the infrared receiving assembly are affected by sunlight, and under general conditions, both the infrared transmitting assembly and the infrared receiving assembly work under the sunlight, so that the infrared transmitting assembly and the infrared receiving assembly have the problems of slow response, misjudgment and the like, and cannot be applied to outdoor equipment or scenes, so that the application scene of the infrared diode sensing circuit is affected by environmental factors and cannot be applied to all occasions.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an adjusting method for the sensing distance of an infrared device, which can solve the problem that the application scene of an infrared diode sensing circuit is influenced by environmental factors and cannot be suitable for all occasions.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a method for adjusting an inductive distance of an infrared device, comprising the steps of:
s1: the method comprises the steps of obtaining a maximum AD value and a minimum AD value detected by an induction module in preset time;
s2: and judging whether the difference value between the maximum AD value and the minimum AD value is smaller than a first preset value, if so, resetting the reference AD value of the detection reference surface, and if not, judging that the detection reference surface is an effective action.
Preferably, the step S2 is specifically implemented by the following steps:
s21: judging whether the difference value between the maximum AD value and the minimum AD value is smaller than a first preset value, if so, executing S22, if not, re-detecting the instant AD value, and executing S23;
s22: calculating an average value of the AD values in a preset time, and setting the average value as a reference AD value of the detection reference surface;
s23: judging whether the difference value between the detected instant AD value and the reference AD value is smaller than a second preset value, if so, clearing timing and re-detecting the instant AD value, and if not, judging that the operation is an effective operation.
Preferably, the second preset value is 150 or 1/20 of the reference AD value.
Preferably, the preset time is 5 seconds.
Preferably, the first preset value is 100.
Preferably, the sensing module comprises a sensing circuit, a power input port for providing power for the sensing circuit and a signal output port for generating an AD value, the sensing circuit comprises a resistor R1, a resistor R2, an infrared emission component and an infrared receiving component, one end of the resistor R1 and one end of the resistor R2 are connected with the power module through power input ends, the other end of the resistor R1 is grounded through the infrared emission component, the other end of the resistor R2 and one end of the infrared receiving component are connected with the control module through the signal output port, and the other end of the infrared receiving component is grounded.
Preferably, the step S1 is specifically implemented by the following steps:
s11: acquiring infrared light rays of the current environment through an infrared receiving component to obtain an initial AD value sent by a signal output port, and setting the initial AD value as a reference AD value of a detection reference surface;
s12: transmitting infrared light rays to a detection area within preset time through an infrared transmitting assembly, so that the infrared receiving assembly obtains the infrared light rays reflected by a shielding object in the detection area;
s13: and acquiring the AD value sent by the signal output port in the preset time, and screening out the largest AD value and the smallest AD value.
Preferably, the infrared emission component comprises an infrared emission diode D1, the other end of the resistor R1 is connected with the positive electrode of the infrared emission diode D1, and the negative electrode of the infrared emission diode D1 is grounded.
Preferably, the infrared receiving component comprises an infrared receiving diode D2, the other end of the resistor R2 and the negative electrode of the infrared receiving diode D2 are connected with the control module through a signal output port LIGHT_DET of the sensing circuit, and the positive electrode of the infrared receiving diode D2 is grounded.
Preferably, the sensing module further includes a filter circuit, the filter circuit includes a capacitor C1 and a capacitor C2, one end of the capacitor C1 and one end of the capacitor C2 are both connected with a power input port 3v3_led of the sensing circuit, and the other end of the capacitor C1 and the other end of the capacitor C2 are both grounded.
Compared with the prior art, the invention has the beneficial effects that: comparing the first preset value with the difference value between the maximum AD value and the minimum AD value obtained in the preset time to judge whether the infrared light obtained by the induction module in the current time is from the environment, if so, resetting the reference AD value of the detection reference surface, and if not, re-detecting; comparing the detected instant AD value with a reference AD value to judge whether the action is effective, if so, judging that the action is effective, and if not, re-detecting; thereby achieving the functions of self-adapting environment and avoiding misjudgment.
Drawings
Fig. 1 is a circuit diagram of an induction circuit according to the present invention.
Fig. 2 is a flowchart of a method for adjusting the sensing distance of an infrared device according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will be further described with reference to the accompanying drawings and detailed description below:
in the invention, the power input port can be externally connected to a commercial power grid through a power adapter, and can convert 220V commercial power into rated voltage suitable for normal operation of an induction circuit, and can also be a storage battery, and can directly provide rated voltage for the induction circuit; in this embodiment, the surface of the object reflects the infrared light emitted by the infrared emitting component to the infrared receiving component, so that the sensing module sends an AD value to the control module, where the AD value is a signal generated after the signal output port obtains a voltage value change generated by the infrared receiving diode D2 according to the number of the received infrared light; the control module can be a control terminal with data processing capability such as a singlechip, a computer and the like; the capacitor C1 and the capacitor C2 are filter capacitors and are used for filtering low-frequency signals so as to provide a stable power supply for the induction circuit; the resistor R1 and the resistor R2 are limiting current resistors, and current and voltage of currents flowing into the infrared emission component and the infrared receiving component are limited and divided respectively, so that the infrared emission component and the infrared receiving component are prevented from being burnt out by overlarge currents and voltages.
As shown in fig. 1-2, a method for adjusting the sensing distance of an infrared device includes the following steps:
s1: the method comprises the steps of obtaining a maximum AD value and a minimum AD value detected by an induction module in preset time;
specifically, the induction module includes induction circuit, is used for providing the power input port of power and the signal output port that is used for generating the AD value to induction circuit, induction circuit includes resistance R1, resistance R2, infrared transmission subassembly and infrared receiving subassembly, resistance R1's one end and resistance R2's one end all are connected with power module through the power input end, resistance R1's the other end passes through infrared transmission subassembly ground connection, resistance R2's the other end and infrared receiving subassembly's one end all are connected with control module through signal output port, infrared receiving subassembly's the other end ground connection, in this embodiment, in order to ensure that induction module can work steadily, induction module still includes filter circuit, filter circuit includes electric capacity C1 and electric capacity C2 electric capacity C1's one end and electric capacity C2's one end all are connected with induction circuit's power input port, electric capacity C1's the other end and electric capacity C2's the other end all ground connection to with the low frequency signal in the electric current of power input port input to induction circuit, provide stable power for induction circuit filtering. Then, current flowing into the infrared emission component and the infrared receiving component is limited and divided by the resistor R1 and the resistor R2 respectively so as to prevent the infrared emission component and the infrared receiving component from being burnt out by overlarge current and voltage, preferably, the infrared emission component comprises an infrared emission diode D1, the other end of the resistor R1 is connected with the positive electrode of the infrared emission diode D1, the negative electrode of the infrared emission diode D1 is grounded, the infrared receiving component comprises an infrared receiving diode D2, and the other end of the resistor R2 and the negative electrode of the infrared receiving diode D2 are connected with the control module through signal output ports of sensing circuits, and the positive electrode of the infrared receiving diode D2 is grounded. So the step S1 is realized by the following steps:
s11: acquiring infrared light rays of the current environment through an infrared receiving component to obtain an initial AD value sent by a signal output port, and setting the initial AD value as a reference AD value of a detection reference surface;
specifically, after the power is on, the infrared receiving diode D2 obtains a voltage value according to the illumination intensity of the current environment, and then the signal output port sends an AD value to the control module according to the voltage value, where the control module takes the AD value as an initial reference AD value (the ADC of the control module is 12 bits) in the initial state, that is, an initial detection reference plane.
S12: transmitting infrared light rays to a detection area within preset time through an infrared transmitting assembly, so that the infrared receiving assembly obtains the infrared light rays reflected by a shielding object in the detection area;
specifically, after entering a normal working state, the infrared emission component continuously emits infrared light to the detection area within a preset time, a shielding object in the detection area reflects the infrared light emitted by the infrared emission component to the infrared receiving component, so that the voltage value of the infrared receiving diode D2 changes (the conduction state of the infrared receiving diode D2 changes), the signal output port obtains the voltage value change of the infrared receiving diode D2 of the sensing circuit within the preset time, and then an AD value is generated and sent to an AD port of the control module.
S13: and acquiring the AD value sent by the signal output port in the preset time, and screening out the largest AD value and the smallest AD value.
Specifically, after the control module obtains all AD values generated by the signal output port within a preset time, the control module screens out the largest AD value and the smallest AD value; in this embodiment, after the preset time is 5 seconds and the normal working state is entered, the infrared emitting component continuously emits the infrared LIGHT to the detection area within 5 seconds, so that the infrared receiving component obtains the infrared LIGHT reflected by the shielding object, the on state of the infrared receiving diode D2 is changed, the signal output port light_det generates and sends corresponding AD values to the AD port of the control module after all voltage values of the infrared receiving diode D2 of the sensing circuit are changed within 5 seconds, and the control module screens out the largest AD value and the smallest AD value within 5 seconds through algorithms such as sequencing or comparison.
S2: judging whether the difference value (AD change value) between the maximum AD value and the minimum AD value is smaller than a first preset value, if so, resetting the reference AD value of the detection reference surface, and if not, judging that the operation is effective.
Specifically, the magnitude of the difference (AD change value) between the maximum AD value and the minimum AD value is determined to determine whether the change (invalid action) is an effective action or an environment, in this embodiment, the first preset value is 100, and the step S2 is specifically implemented by the following steps:
s21: judging whether the difference value (AD change value) between the maximum AD value and the minimum AD value is smaller than a first preset value, if so, executing S22, if not, re-detecting the instant AD value, and executing S23;
specifically, when the ambient light changes, the infrared receiving diode D2 of the sensing circuit is also affected, and when the ambient change reaches a certain level, the detection reference surface and/or the reference AD value need to be readjusted. In this embodiment, the change threshold is set to 100, when the difference (AD change value) between the maximum AD value and the minimum AD value is smaller than 100, the reference AD value is reset, and when the difference (AD change value) between the maximum AD value and the minimum AD value is larger than 100, the detection is repeated, so that erroneous judgment is avoided.
S22: calculating an average value of the AD values in a preset time, and setting the average value as a reference AD value of the detection reference surface;
specifically, when the difference (AD variation value) between the maximum AD value and the minimum AD value within 5 seconds is smaller than 100, the control module averages all the AD values acquired within 5 seconds, sets the average value as the reference AD value of the detection reference plane, and then detects the variation of the AD value based on the new reference AD value of the detection reference plane to determine effective actions, thereby achieving the function of adapting to the environment.
S23: judging whether the difference value between the detected instant AD value and the reference AD value is smaller than a second preset value, if so, clearing timing and re-detecting the instant AD value, and if not, judging that the operation is an effective operation.
Specifically, the change of the AD value caused by the change of the environmental condition is generally within a second preset value, when the difference (AD change value) between the maximum AD value and the minimum AD value within 5 seconds is greater than 100, the timing is resumed, and the external infrared light is obtained again through the infrared receiving diode D2, so that the control module obtains the instant AD value, when judging whether the difference between the instant AD value and the reference AD value is smaller than the second preset value, if the difference is smaller than the second preset value, the timing is cleared, and the instant AD value is detected again, so as to avoid erroneous judgment, if the difference is larger than the second preset value, the effective action is determined, and the distance between the object is calculated, so that the control module controls some corresponding functional modules to act, in this embodiment, the second preset value is 150 or 1/20 of the reference AD value, along with the environmental conditionThe value of the detection reference plane may not reach 2 12 Under certain environmental conditions, the value of the detection reference surface may be only 2 11 When the value of the detection reference surface reaches 2 12 When the value of the detection reference surface cannot reach 2, the second preset value is 1/20 of the reference AD value 12 And when the second preset value is 150, the second preset value is flexibly adjusted to avoid erroneous judgment.
It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the invention as defined in the appended claims.
Claims (8)
1. A method for adjusting the sensing distance of an infrared device, comprising the steps of:
s1: the method comprises the steps of obtaining a maximum AD value and a minimum AD value detected by an induction module in preset time;
the step S1 is specifically realized by the following steps:
s11: acquiring infrared light rays of the current environment through an infrared receiving component to obtain an initial AD value sent by a signal output port, and setting the initial AD value as a reference AD value of a detection reference surface;
s12: transmitting infrared light rays to a detection area within preset time through an infrared transmitting assembly, so that the infrared receiving assembly obtains the infrared light rays reflected by a shielding object in the detection area;
s13: acquiring an AD value sent by a signal output port in a preset time, and screening out a maximum AD value and a minimum AD value;
s2: judging whether the difference value between the maximum AD value and the minimum AD value is smaller than a first preset value, if so, resetting the reference AD value of the detection reference surface, and if not, judging that the detection reference surface is an effective action;
the step S2 is specifically realized by the following steps:
s21: judging whether the difference value between the maximum AD value and the minimum AD value is smaller than a first preset value, if so, executing S22, if not, re-detecting the instant AD value, and executing S23;
s22: calculating an average value of the AD values in a preset time, and setting the average value as a reference AD value of the detection reference surface;
s23: judging whether the difference value between the detected instant AD value and the reference AD value is smaller than a second preset value, if so, clearing timing and re-detecting the instant AD value, and if not, judging that the operation is an effective operation.
2. The method for adjusting the sensing distance of an infrared device according to claim 1, wherein: the second preset value is 150 or 1/20 of the reference AD value.
3. The method for adjusting the sensing distance of an infrared device according to claim 2, wherein: the preset time is 5 seconds.
4. A method for adjusting the sensing distance of an infrared device as defined in claim 3, wherein: the first preset value is 100.
5. The method for adjusting the sensing distance of an infrared device according to claim 4, wherein: the induction module comprises an induction circuit, a power input port for providing power for the induction circuit and a signal output port for generating an AD value, the induction circuit comprises a resistor R1, a resistor R2, an infrared emission component and an infrared receiving component, one end of the resistor R1 and one end of the resistor R2 are connected with the power module through the power input end, the other end of the resistor R1 is grounded through the infrared emission component, the other end of the resistor R2 and one end of the infrared receiving component are connected with the control module through the signal output port, and the other end of the infrared receiving component is grounded.
6. The method for adjusting the sensing distance of an infrared device according to claim 5, wherein: the infrared emission component comprises an infrared emission diode D1, the other end of the resistor R1 is connected with the positive electrode of the infrared emission diode D1, and the negative electrode of the infrared emission diode D1 is grounded.
7. The method for adjusting the sensing distance of an infrared device according to claim 6, wherein: the infrared receiving assembly comprises an infrared receiving diode D2, the other end of the resistor R2 and the negative electrode of the infrared receiving diode D2 are connected with the control module through a signal output port LIGHT_DET of the sensing circuit, and the positive electrode of the infrared receiving diode D2 is grounded.
8. The method for adjusting the sensing distance of an infrared device according to claim 7, wherein: the sensing module further comprises a filter circuit, the filter circuit comprises a capacitor C1 and a capacitor C2, one end of the capacitor C1 and one end of the capacitor C2 are connected with a power input port 3V3_LED of the sensing circuit, and the other end of the capacitor C1 and the other end of the capacitor C2 are grounded.
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| CN113598613B (en) * | 2021-07-30 | 2023-01-03 | 宁波心想科技有限公司 | Infrared sensing method of water dispenser and water dispenser applying same |
| CN113839660A (en) * | 2021-08-03 | 2021-12-24 | 中国电器科学研究院股份有限公司 | Man-machine interaction equipment suitable for complex household appliance environment |
| CN113701714A (en) * | 2021-09-23 | 2021-11-26 | 深圳市微特精密科技股份有限公司 | Method and device for identifying flattening calibration of DUT (device under test) by infrared reflection sensor |
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