CN204349959U - Integrated instrument low-power consumption photoinduction key range switching circuit - Google Patents
Integrated instrument low-power consumption photoinduction key range switching circuit Download PDFInfo
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- CN204349959U CN204349959U CN201520056902.7U CN201520056902U CN204349959U CN 204349959 U CN204349959 U CN 204349959U CN 201520056902 U CN201520056902 U CN 201520056902U CN 204349959 U CN204349959 U CN 204349959U
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- microprocessor
- power consumption
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- key range
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Abstract
The utility model discloses a kind of integrated instrument low-power consumption photoinduction key range switching circuit, include: the infrared emission tube responded to for detected area light for a pair and infrared receiver tube, on the same end being placed in circuit board altogether and adjacent laying each other; One microprocessor; One analog switching ic unit; One output wiring terminal; Described infrared emission tube is connected with a general I/O interface of microprocessor, and by its break-make of this Microprocessor S3C44B0X; Infrared receiver tube is connected with another general I/O interface of microprocessor, and this infrared receiver pipe electrode powers on and presses the information of variation to send microprocessor to by this general I/O interface; Microprocessor one control output end connects the switch control rule port of analog switching ic; The switch of analog switching ic exports and connects output wiring terminal.It is miniaturized and integrated, be beneficial to installation by adhering to having in the instrument of isolation button application demand, instrument or relevant device, and self circuit power consumption is low.
Description
Technical field
The utility model relates to a kind of photoinduction isolated key switch circuit, particularly integrated instrument low-power consumption photoinduction key range switching circuit.
Background technology
Various instrument in instrument and meter industry all need the key-press input parts of man-machine interaction, traditional key-press input parts mostly generally are mechanical key switch, magnetic induction key switch, capacitive induction switch, photoinduction key switch and touch-screen etc., according to different application demands, respectively there is respective application scenario.Along with the expansion of instrument and meter application scenario and demand become privileged Requirement Increases, occur that many users require that key-press input parts will have mechanical isolation features, tradition mechanical key can not meet the demands completely, some isolated buttons of current appearance all respectively have some self application limitations: magnetic induction press-key structure relative complex, need careful adjustment magnet and tongue tube magnetic gap action thresholding, and prevent the closely problem such as adjacent Multi-Switch interference maloperation work; The distance of reaction of capacitive induction switch is less; The switch of light reflection receivable principle design is utilized to start to occur, this kind of application advantage is that induction operating distance is far away, can through transparency window isolation induction, mechanical structure is relatively simple, but also faces some to technical problems such as the filtering of environmental background light beats interference and circuit self power consumption sizes.
Utility model content
The purpose of this utility model is to provide a kind of integrated instrument low-power consumption photoinduction key range switching circuit, and it is miniaturized and integrated, is beneficial to installation by adhering to having in the instrument of isolation button application demand, instrument or relevant device.
For achieving the above object, the utility model takes following design:
A kind of integrated instrument low-power consumption photoinduction key range switching circuit, it includes:
The infrared emission tube responded to for detected area light for a pair and infrared receiver tube, on the same end being placed in the circuit board of this integrated instrument low-power consumption photoinduction key range switching circuit altogether and adjacent laying each other;
One microprocessor;
One analog switching ic unit;
One output wiring terminal;
Described infrared emission tube is connected with a general I/O interface of described microprocessor, and by its break-make of this Microprocessor S3C44B0X; Described infrared receiver tube is connected with another general I/O interface of microprocessor, and this infrared receiver pipe electrode powers on and presses the information of variation to send described microprocessor to by this general I/O interface;
A general I/O interface pin of described microprocessor is connected to the switch control rule port of described analog switching ic; The switch of described analog switching ic exports and is connected to described output wiring terminal.
In described integrated instrument low-power consumption photoinduction key range switching circuit, the negative electrode of described infrared receiver tube is directly received on the I/O port line of microprocessor.
In described integrated instrument low-power consumption photoinduction key range switching circuit, in the loop that described infrared emission tube is connected with an I/O port line of microprocessor, be serially connected with a current-limiting resistance.
In described integrated instrument low-power consumption photoinduction key range switching circuit, together receive on Microprocessor S3C44B0X output after 4 switch control terminal parallel connections of described analog switching ic; Together draw after 4 output switching terminal parallel connections of analog switching ic and receive on output wiring terminal.
In described integrated instrument low-power consumption photoinduction key range switching circuit, described microprocessor is low-power consumption type PIC10F32X series monolithic.
In described integrated instrument low-power consumption photoinduction key range switching circuit, described analog switching ic, in the mode of Surface Mount welded and installed, is encapsulated on the circuit board of this integrated instrument low-power consumption photoinduction key range switching circuit.
The utility model also can substitute described analog switching ic with similar other electronic switches with low on-resistance such as metal-oxide-semiconductor field effect transistors.
The utility model has the advantages that: self circuit power consumption is low, and the miniaturized design of one is beneficial to installation by adhering to having in the instrument of isolation button application demand, instrument or relevant device.
Accompanying drawing explanation
Fig. 1 is the utility model integrated instrument low-power consumption photoinduction key range switching circuit structure schematic diagram (surface structure).
Fig. 2 is circuit theory diagrams of the present utility model.
Below in conjunction with drawings and the specific embodiments, the utility model is described further.
Embodiment
Shown in Fig. 1 and Fig. 2, the utility model integrated instrument low-power consumption photoinduction key range switching circuit mainly includes: infrared emission tube 1, infrared receiver tube 2, microprocessor 3, analog switching ic 4 and an output wiring terminal 5.
Shown in Figure 1, described infrared emission tube and infrared receiver tube 2 are placed on the circuit board of this integrated instrument low-power consumption photoinduction key range switching circuit altogether, and are assembled to position adjoining on circuit board.
As shown in Figure 2, a general I/O interface pin of microprocessor (in the present embodiment preferred PIC10F32X) 3 is connected to the positive pole of infrared emission tube 1 by series resistance R1, control this infrared emission tube timesharing thus to open and shutoff, make the region in its front certain distance have the Infrared of launching; Another general I/O interface pin of microprocessor 3 is directly connected to the negative pole end of infrared receiver tube 2, and the positive terminal of this infrared receiver tube 2 is connected after a resistance R2 and received on the negative pole of power supply; By infrared emitting, receive and be assembled to adjoining position on circuit board to pipe, by such layout, infrared receiver tube just can be tried one's best to sense delicately and be blocked reflected infrared light by tested shelter; Another general I/O interface pin of microprocessor 3 is connected to analog switching ic U2 by a series resistance R3, and (model: 4066) 4 are parallel on switch control terminal is together linked on lead-out terminal 5 (H1) after four analoging switch output ends of analog switching ic U2 are together in parallel together.
The microprocessor adopted is preferably the single-chip microcomputer of low-power consumption, few pin, small size encapsulation, the low-power consumption type PIC10F32X series monolithic of pin package as few in novel small size, infrared ray transmitter and receiver is controlled to the time-sharing work of pipe by it, sensing appointed area whether testee intervention is blocked, after testing result is judged, export and the control end of control simulation switching circuit, make it open or close.
Separately, the utility model also can do equivalent transformation application to some unit or components and parts, such as analog switching ic 4066 is changed into similar other electronic switches with low on-resistance such as metal-oxide-semiconductor field effect transistor, etc.
The various embodiments described above can not to depart under scope of the present utility model in addition some changes, therefore above explanation comprises and should be considered as exemplary, and is not used to limit the protection range that the utility model applies for a patent.
Claims (6)
1. an integrated instrument low-power consumption photoinduction key range switching circuit, is characterized in that including:
The infrared emission tube responded to for detected area light for a pair and infrared receiver tube, on the same end being placed in the circuit board of this integrated instrument low-power consumption photoinduction key range switching circuit altogether and adjacent laying each other;
One microprocessor;
One analog switching ic;
One output wiring terminal;
Described infrared emission tube is connected with a general I/O interface of described microprocessor, and by its break-make of this Microprocessor S3C44B0X; Described infrared receiver tube is connected with another general I/O interface of microprocessor, and this infrared receiver pipe electrode powers on and presses the information of variation to send described microprocessor to by this general I/O interface;
Described microprocessor general I/O interface pin is connected to the switch control rule port of described analog switching ic; Connect the switch control rule port of described analog switching ic; The switch of described analog switching ic exports and connects described output wiring terminal.
2. integrated instrument low-power consumption photoinduction key range switching circuit as claimed in claim 1, is characterized in that: the negative electrode of described infrared receiver tube is directly received on the I/O port line of microprocessor.
3. integrated instrument low-power consumption photoinduction key range switching circuit as claimed in claim 1, is characterized in that: be serially connected with a current-limiting resistance in the loop that described infrared emission tube is connected with an I/O port line of microprocessor.
4. integrated instrument low-power consumption photoinduction key range switching circuit as claimed in claim 1, is characterized in that: together receive on Microprocessor S3C44B0X output after 4 switch control terminal parallel connections of described analog switching ic; Together draw after 4 output switching terminal parallel connections of analog switching ic and receive on output wiring terminal.
5. integrated instrument low-power consumption photoinduction key range switching circuit as claimed in claim 1, is characterized in that: described microprocessor is low-power consumption type PIC10F32X series monolithic.
6. integrated instrument low-power consumption photoinduction key range switching circuit as claimed in claim 1, it is characterized in that: described analog switching ic, in the mode of Surface Mount welded and installed, is encapsulated on the circuit board of this integrated instrument low-power consumption photoinduction key range switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520056902.7U CN204349959U (en) | 2015-01-27 | 2015-01-27 | Integrated instrument low-power consumption photoinduction key range switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520056902.7U CN204349959U (en) | 2015-01-27 | 2015-01-27 | Integrated instrument low-power consumption photoinduction key range switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204349959U true CN204349959U (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520056902.7U Active CN204349959U (en) | 2015-01-27 | 2015-01-27 | Integrated instrument low-power consumption photoinduction key range switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204349959U (en) |
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2015
- 2015-01-27 CN CN201520056902.7U patent/CN204349959U/en active Active
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