CN101727081A - Human body induction control method, control circuit and application thereof - Google Patents
Human body induction control method, control circuit and application thereof Download PDFInfo
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- CN101727081A CN101727081A CN200810201443A CN200810201443A CN101727081A CN 101727081 A CN101727081 A CN 101727081A CN 200810201443 A CN200810201443 A CN 200810201443A CN 200810201443 A CN200810201443 A CN 200810201443A CN 101727081 A CN101727081 A CN 101727081A
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- human body
- body induction
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Abstract
The invention relates to a human body induction control method, comprising the following steps of: sensing a human body signal and outputting the corresponding signal by an infrared probe; amplifying the signal by an amplifier, sending the signal to a comparer for comparison and then outputting a corresponding level; and transmitting the level to a single-chip machine to control the single-chip machine to send out a command. A control circuit consists of the infrared probe, the amplifier and the comparer, wherein the output signal is weakened when the infrared probe senses the human body signal, the voltage of the signal is lower than the level value of the reference voltage of the comparer after the signal passes through the amplifier and then is compared to the set reference voltage through the comparer, the voltage signal is sent to the single-chip machine which sends out a control program so that an LED lamp gives out light, and the like. The control circuit of the invention is simple, is convenient to realize, and can be applied to the control of lamp light and the like so as to prolong the service life of the lamp.
Description
Technical field
The invention belongs to field of electric control, relate to by the human body induction control circuit working.
Background technology
In the schedule life, our employed refrigerator etc. is provided with the display board of LED and LCD, it is when work, no matter there is nobody to be in, need to see demonstration, LED on the display board or LCD be light yellow always, and the life-span of LED or LCD is shortened in long-time so continual work meeting, thereby can increase the market fraction defective.Therefore, can design a kind of human body induction control circuit, show by human body sensing for the demonstration that does not need often to check.
Summary of the invention
The object of the present invention is to provide a kind of human body induction control method, control circuit, by the work of induction human body control circuit, the control that it can be applicable to LED and LCD does not show it when the user does not need to check, thereby increases the life-span of LED or LCD.
For reaching above purpose, solution of the present invention is:
A kind of human body induction control method, infrared probe sensing human body signal is also exported corresponding signal, and amplifier amplifies this signal to be sent into comparer and compares and export corresponding level, and this level is sent to Single-chip Controlling, and it sends instruction.
Further, this comparer is provided with reference voltage.
Output signal weakened when this infrared probe sensed human body signal, and voltage is lower than the level value of comparator reference voltage behind the process amplifier, comparer output high level/low level; Output signal was not constant when infrared probe sensed human body signal, and voltage is higher than the level value of comparator reference voltage, comparer output low level/high level behind the process amplifier.
Human body induction control method is applied to switch LED lamp, and the LED lamp is connected by its gauge tap with the output of the single-chip microcomputer of human body induction control circuit.
This single-chip microcomputer setting detects the bright lamp of high level LED lamp 2 minutes.
A kind of human body induction control circuit, comprise infrared probe, amplifier, comparer, single-chip microcomputer, the infrared probe of sensing human body is connected with amplifier, the output terminal of amplifier links to each other with comparer, the output of comparer is connected to single-chip microcomputer, and another input end of comparer also is connected with resistance and forms reference voltage.
This resistance is the variable adjustment potentiometer.
This infrared probe is provided with convex lens.
The human body induction control circuit application is in switch LED lamp, and the LED lamp is connected by its gauge tap with the output of the single-chip microcomputer of human body induction control circuit.
This single-chip microcomputer setting detects the bright lamp of high level LED lamp 2 minutes.
Owing to adopted such scheme, the present invention to have following characteristics: the present invention uses convex lens to focus on infrared, thereby strengthens induction; Use the scalable potentiometer, can oneself induction sensitivity be set; And compare with the sensor circuit that existing induction is opened in the water swivel automatically, simpler, cost is lower, easily control.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a circuit diagram of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
The present invention has mainly realized the control of human body sensing by having used infrared sensor, operational amplifier.
As Fig. 1-shown in Figure 2, infrared induction probe sensing human body, and then send a signal to amplifier IC1 and amplify, signal input comparator IC2 after the amplification, the output of amplifier IC1 connects the reverse input end of comparer IC2, another positive input then meets reference voltage regulator potentiometer RP, be used for regulating circuit sensitivity, just (reference voltage (No. 2 pin voltages of comparer IC2) is higher than the output voltage (No. 3 pin voltages of comparer IC2) of amplifier IC1 to investigative range, comparer IC2 exports high level, on the contrary output low level then).Comparer IC2 output comparative result sends to single-chip microprocessor MCU, and then single-chip microprocessor MCU sending controling instruction executive routine.
During concrete the use, when the people enters investigative range, probe receives the heat of human body release and releases infrared signal, and its output detecting voltage weakens, and makes signal output voltage be lower than reference voltage after amplifier IC1 amplifies, at this moment the output high level of comparer IC2, when single-chip microprocessor MCU detects high level, then carry out display routine, display board is bright, demonstration two minutes are set, extinguish automatically again; When nobody enters investigative range, probe output does not change, the reference voltage of its output voltage height and comparer after amplifier amplifies, the comparer output low level, after single-chip microcomputer detects low level, then do not carry out display routine, display board does not work, thereby reaches the requirement of control display board light on and off.
Because the infra-red heat signal on the human body is more diffusing, infrared probe is difficult for detecting, and therefore can add convex lens in the probe front, and Infrared is focused on, and strengthens detectivity.
The present invention can accomplish that by the control of human induction switch display board is just bright when the people is close, when nobody is close, then extinguishes, and has so just increased the service time of LED or LCD.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (10)
1. human body induction control method, it is characterized in that: infrared probe sensing human body signal is also exported corresponding signal, and amplifier amplifies this signal to be sent into comparer and compares and export corresponding level, and this level is sent to Single-chip Controlling, and it sends instruction.
2. human body induction control method as claimed in claim 1 is characterized in that: this comparer is provided with reference voltage.
3. human body induction control method as claimed in claim 1 is characterized in that: output signal weakened when this infrared probe sensed human body signal, and voltage is lower than the level value of comparator reference voltage behind the process amplifier, comparer output high level/low level; Output signal was not constant when infrared probe sensed human body signal, and voltage is higher than the level value of comparator reference voltage, comparer output low level/high level behind the process amplifier.
4. as human body induction control method control LED lamp as described in the claim 1-3, it is characterized in that: human body induction control method is applied to switch LED lamp, and the LED lamp is connected by its gauge tap with the output of the single-chip microcomputer of human body induction control circuit.
5. as human body induction control method control LED lamp as described in the claim 4, it is characterized in that: this single-chip microcomputer setting detects the bright lamp of high level LED lamp 2 minutes.
6. human body induction control circuit, it is characterized in that: comprise infrared probe, amplifier, comparer, single-chip microcomputer, the infrared probe of sensing human body is connected with amplifier, the output terminal of amplifier links to each other with comparer, the output of comparer is connected to single-chip microcomputer, and another input end of comparer also is connected with resistance and forms reference voltage.
7. human body induction control circuit as claimed in claim 6 is characterized in that: this resistance is the variable adjustment potentiometer.
8. human body induction control circuit as claimed in claim 6 is characterized in that: this infrared probe is provided with convex lens.
9. as the described human body induction control circuit control of claim 6-8 LED lamp, it is characterized in that: the human body induction control circuit application is in switch LED lamp, and the LED lamp is connected by its gauge tap with the output of the single-chip microcomputer of human body induction control circuit.
10. human body induction control circuit control LED lamp as claimed in claim 9, it is characterized in that: this single-chip microcomputer setting detects the bright lamp of high level LED lamp 2 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810201443A CN101727081A (en) | 2008-10-21 | 2008-10-21 | Human body induction control method, control circuit and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810201443A CN101727081A (en) | 2008-10-21 | 2008-10-21 | Human body induction control method, control circuit and application thereof |
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| CN101727081A true CN101727081A (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810201443A Pending CN101727081A (en) | 2008-10-21 | 2008-10-21 | Human body induction control method, control circuit and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102056375A (en) * | 2010-10-25 | 2011-05-11 | 苏州高新区禾云设备设计事务所 | Night induction lighting control circuit |
| CN102800280A (en) * | 2012-08-08 | 2012-11-28 | 管存忠 | Single-board integrated LED (light emitting diode) dot matrix module with pyroelectric human body infrared sensor |
| CN102820875A (en) * | 2011-06-09 | 2012-12-12 | 福特全球技术公司 | Proximity switch having sensitivity control and method therefor |
| CN103063551A (en) * | 2012-12-27 | 2013-04-24 | 江苏大学 | Spray deposition evaluation device and evaluation method thereof |
| CN112129716A (en) * | 2020-08-25 | 2020-12-25 | 江苏大学 | Green plant identification probe with adjustable sensitivity |
-
2008
- 2008-10-21 CN CN200810201443A patent/CN101727081A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102056375A (en) * | 2010-10-25 | 2011-05-11 | 苏州高新区禾云设备设计事务所 | Night induction lighting control circuit |
| CN102820875A (en) * | 2011-06-09 | 2012-12-12 | 福特全球技术公司 | Proximity switch having sensitivity control and method therefor |
| CN102800280A (en) * | 2012-08-08 | 2012-11-28 | 管存忠 | Single-board integrated LED (light emitting diode) dot matrix module with pyroelectric human body infrared sensor |
| CN103063551A (en) * | 2012-12-27 | 2013-04-24 | 江苏大学 | Spray deposition evaluation device and evaluation method thereof |
| CN112129716A (en) * | 2020-08-25 | 2020-12-25 | 江苏大学 | Green plant identification probe with adjustable sensitivity |
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Application publication date: 20100609 |