CN202904281U - Door opening/closing state detecting device - Google Patents
Door opening/closing state detecting device Download PDFInfo
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- CN202904281U CN202904281U CN 201220544335 CN201220544335U CN202904281U CN 202904281 U CN202904281 U CN 202904281U CN 201220544335 CN201220544335 CN 201220544335 CN 201220544335 U CN201220544335 U CN 201220544335U CN 202904281 U CN202904281 U CN 202904281U
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Abstract
The utility model discloses a door opening/closing state detecting device comprising a central processing unit, an infrared transmit-receive tube, a drive circuit, a signal sampling circuit and a power supply. The central processing unit is connected with the drive circuit, the signal sampling circuit and the power supply separately, the drive circuit is also connected with the emitting end of the infrared transmit-receive tube, and the signal sampling circuit is also connected with the receiving end of the infrared transmit-receive tube; the infrared transmit-receive tube is arranged on the inner side of a door frame, and the emitting head and receiving head of the infrared transmit-receive tube are pointed right to a door. By detecting the opening/closing state of the door in a non-contact manner, the door opening/closing state detecting device of the utility model is longer in service life and is not affected by an environment.
Description
Technical field
The utility model relates to a kind of pick-up unit, relates in particular to a kind of door opening and closing state pick-up unit.
Background technology
The door switch pick-up unit normal operation of the electrical equipment such as existing refrigerator, washing machine be mechanical switch, because mechanical switch is a kind of switch of contact, its serviceable life is shorter, affected by environment easily, contact performance and the resistance to corrosion of mechanical switch electric contact can descend after long-time the use, produce easily loose contact, send rub-out signal for the controller of the electrical equipment such as refrigerator, washing machine.
China Patent Publication No. CN1255616A, open day on June 7th, 2000, the name of invention is called the structure of the ON/OFF pick-up unit of refrigerator doors, this application case discloses a kind of structure of ON/OFF pick-up unit of refrigerator doors, it comprises a door open-close detector switch housing and a door open-close detector switch, described door open-close detector switch housing forms has the lid shape of predetermined space cell, and cover the mounting hole that is positioned at inner casing one side, and be provided with a lead-in wire terminals unit that is connected with the control loop of refrigerator in the one side, described door open-close detector switch is arranged in the mounting hole of inner casing, and in a side of door open-close detector switch the switch wire connection end unit that is connected with the terminals unit of housing is housed.Its weak point is, what this device used is mechanical switch, and serviceable life is shorter, and is affected by environment easily, and contact performance and the resistance to corrosion of mechanical switch electric contact can descend after long-time the use, produce easily loose contact.
The utility model content
The purpose of this utility model is that what to overcome that the door switch pick-up unit of the electrical equipment such as existing refrigerator, washing machine uses is mechanical switch, serviceable life is shorter, affected by environment easily, contact performance and the resistance to corrosion of mechanical switch electric contact can descend after long-time the use, produce easily the technical matters of loose contact, a kind of door opening and closing state pick-up unit is provided, it is by the on off state of cordless detecting gate, serviceable life is longer, and is not affected by environment.
In order to address the above problem, the utility model is achieved by the following technical solutions:
A kind of door opening and closing state pick-up unit of the present utility model, comprise CPU (central processing unit), infrared receiving/transmission pipe, driving circuit, signal sample circuit and power supply, described CPU (central processing unit) links to each other with driving circuit, signal sample circuit and power supply respectively, described driving circuit also links to each other with the transmitting terminal of infrared receiving/transmission pipe, described signal sample circuit also links to each other with the receiving end of infrared receiving/transmission pipe, described infrared receiving/transmission pipe is arranged on the doorframe inboard, and the emitting head of infrared receiving/transmission pipe and Receiver aligning door.
In the technical program, power supply is the power supply of door opening and closing state pick-up unit.The square wave of the I/O mouth output 1KHz of CPU (central processing unit) sends infrared ray by the transmitting terminal that driving circuit drives the infrared receiving/transmission pipe, infrared radiation forms reflection to the door that will detect, the receiving end of infrared receiving/transmission pipe receives the infrared ray that reflects and produces feedback signal, after amplifying by signal sample circuit, feedback signal is input to the A/D mouth of CPU (central processing unit), CPU (central processing unit) is carried out analog to digital conversion to the simulating signal that receives, obtain data value, and this data value is judged.
Door from the infrared receiving/transmission pipe more close to, reflect greatlyr, the data value that CPU (central processing unit) receives is larger.When data value during greater than preset upper limit value, CPU (central processing unit) is sent the information that door is in closed condition to the controller of the electrical equipment such as refrigerator, washing machine; When data value during less than default lower limit, CPU (central processing unit) is sent the information that door is in open mode to the controller of the electrical equipment such as refrigerator, washing machine.
As preferably, described driving circuit comprises resistance R 1, resistance R 2 and triode Q1, resistance R 1 one ends link to each other with the I/O mouth of CPU (central processing unit), the other end links to each other with the base stage of triode Q1, the emitter of triode Q1 links to each other with ground wire, the collector of triode Q1 links to each other with the negative pole of infrared receiving/transmission pipe transmitting terminal, and the positive pole of infrared receiving/transmission pipe transmitting terminal links to each other with resistance R 2 one ends, and resistance R 2 other ends link to each other with positive source.
The square wave of the I/O mouth output 1KHz of CPU (central processing unit) sends infrared ray by the transmitting terminal that triode Q1 drives the infrared receiving/transmission pipe.
As preferably, described signal sample circuit comprises resistance R 3, resistance R 4, resistance R 5, resistance R 6, capacitor C 1, capacitor C 2, capacitor C 3 and triode Q2, resistance R 3 one ends link to each other with ground wire, resistance R 3 other ends link to each other with the negative pole of capacitor C 1 one ends with infrared receiving/transmission pipe receiving end respectively, the positive pole of infrared receiving/transmission pipe receiving end links to each other with positive source, capacitor C 1 other end respectively with capacitor C 2 one ends, the base stage of resistance R 4 one ends and triode Q2 links to each other, capacitor C 2 other ends link to each other with the collector of resistance R 6 one ends and triode Q2 respectively, resistance R 6 other ends link to each other with positive source, resistance R 4 other ends link to each other with capacitor C 3 one ends with resistance R 5 one ends respectively, resistance R 5 other ends link to each other with the A/D mouth of CPU (central processing unit) and the collector of triode Q2 respectively, and the emitter of capacitor C 3 other ends and triode Q2 links to each other with ground wire respectively.
The feedback signal that infrared receiving/transmission pipe receiving end receives is amplified by the base stage that capacitor C 1 is input to triode Q2, and the signal after the collector of triode Q2 will amplify sends to the A/D mouth of CPU (central processing unit).
As preferably, described CPU (central processing unit) is single-chip microcomputer.
The beneficial effects of the utility model are: by the on off state of cordless detecting gate, serviceable life is longer, and is not affected by environment.
Description of drawings
Fig. 1 is that a kind of circuit theory of the present utility model connects block diagram;
Fig. 2 is a kind of mounting structure synoptic diagram of infrared receiving/transmission pipe of the present utility model;
Fig. 3 is a kind of circuit theory diagrams of the present utility model.
Among the figure: 1, CPU (central processing unit), 2, the infrared receiving/transmission pipe, 3, driving circuit, 4, signal sample circuit, 5, power supply, 6, doorframe, 7, door.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of door opening and closing state pick-up unit of present embodiment, as shown in Figure 1, comprise CPU (central processing unit) 1, infrared receiving/transmission pipe 2, driving circuit 3, signal sample circuit 4 and power supply 5, CPU (central processing unit) 1 links to each other with driving circuit 3, signal sample circuit 4 and power supply 5 respectively, driving circuit 3 also links to each other with the transmitting terminal of infrared receiving/transmission pipe 2, and signal sample circuit 4 also links to each other with the receiving end of infrared receiving/transmission pipe 2.
As shown in Figure 2, infrared receiving/transmission pipe 2 is installed in doorframe 6 inboards, and the emitting head of infrared receiving/transmission pipe 2 and Receiver aligning door 7.
As shown in Figure 3, CPU (central processing unit) 1 is single-chip microcomputer, and infrared receiving/transmission pipe 2 is the TCRT5000 infrared tube, and power supply 6 is+the 5V direct supply.Driving circuit 3 comprises resistance R 1, resistance R 2 and triode Q1, resistance R 1 one ends link to each other with the I/O mouth of CPU (central processing unit) 1, the other end links to each other with the base stage of triode Q1, the emitter of triode Q1 links to each other with ground wire, the collector of triode Q1 links to each other with the negative pole of infrared receiving/transmission pipe 2 transmitting terminals, the positive pole of infrared receiving/transmission pipe 2 transmitting terminals links to each other with resistance R 2 one ends, and resistance R 2 other ends link to each other with+5V direct supply.
The square wave of the I/O mouth output 1KHz of CPU (central processing unit) 1 sends infrared ray by the transmitting terminal that triode Q1 drives infrared receiving/transmission pipe 2, infrared radiation forms reflection to the door 8 that will detect, the receiving end of infrared receiving/transmission pipe 2 receives the infrared ray that reflects and produces feedback signal, feedback signal is amplified by the base stage that capacitor C 1 is input to triode Q2, signal after the collector of triode Q2 will amplify sends to the A/D mouth of CPU (central processing unit) 1,1 pair of simulating signal that receives of CPU (central processing unit) is carried out analog to digital conversion, obtain data value, and this data value is judged
Claims (4)
1. door opening and closing state pick-up unit, it is characterized in that: comprise CPU (central processing unit) (1), infrared receiving/transmission pipe (2), driving circuit (3), signal sample circuit (4) and power supply (5), described CPU (central processing unit) (1) respectively with driving circuit (3), signal sample circuit (4) links to each other with power supply (5), described driving circuit (3) also links to each other with the transmitting terminal of infrared receiving/transmission pipe (2), described signal sample circuit (4) also links to each other with the receiving end of infrared receiving/transmission pipe (2), described infrared receiving/transmission pipe (2) is arranged on doorframe (6) inboard, and the emitting head of infrared receiving/transmission pipe (2) and Receiver aligning door (7).
2. a kind of door opening and closing state pick-up unit according to claim 1, it is characterized in that: described driving circuit (3) comprises resistance R 1, resistance R 2 and triode Q1, resistance R 1 one ends link to each other with the I/O mouth of CPU (central processing unit) (1), the other end links to each other with the base stage of triode Q1, the emitter of triode Q1 links to each other with ground wire, the collector of triode Q1 links to each other with the negative pole of infrared receiving/transmission pipe (2) transmitting terminal, the positive pole of infrared receiving/transmission pipe (2) transmitting terminal links to each other with resistance R 2 one ends, and resistance R 2 other ends link to each other with power supply (5) is anodal.
3. a kind of door opening and closing state pick-up unit according to claim 1, it is characterized in that: described signal sample circuit (4) comprises resistance R 3, resistance R 4, resistance R 5, resistance R 6, capacitor C 1, capacitor C 2, capacitor C 3 and triode Q2, resistance R 3 one ends link to each other with ground wire, resistance R 3 other ends link to each other with the negative pole of capacitor C 1 one ends with infrared receiving/transmission pipe (2) receiving end respectively, the positive pole of infrared receiving/transmission pipe (2) receiving end links to each other with power supply (5) is anodal, capacitor C 1 other end respectively with capacitor C 2 one ends, the base stage of resistance R 4 one ends and triode Q2 links to each other, capacitor C 2 other ends link to each other with the collector of resistance R 6 one ends and triode Q2 respectively, resistance R 6 other ends link to each other with power supply (5) is anodal, resistance R 4 other ends link to each other with capacitor C 3 one ends with resistance R 5 one ends respectively, resistance R 5 other ends link to each other with the A/D mouth of CPU (central processing unit) (1) and the collector of triode Q2 respectively, and the emitter of capacitor C 3 other ends and triode Q2 links to each other with ground wire respectively.
4. it is characterized in that according to claim 1 and 2 or 3 described a kind of door opening and closing state pick-up units: described CPU (central processing unit) (1) is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220544335 CN202904281U (en) | 2012-10-23 | 2012-10-23 | Door opening/closing state detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220544335 CN202904281U (en) | 2012-10-23 | 2012-10-23 | Door opening/closing state detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202904281U true CN202904281U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220544335 Expired - Lifetime CN202904281U (en) | 2012-10-23 | 2012-10-23 | Door opening/closing state detecting device |
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| Country | Link |
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| CN (1) | CN202904281U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104268967A (en) * | 2014-09-29 | 2015-01-07 | 深圳市爱普特微电子有限公司 | Safety entrance guard method and device based on capacitance-type sensor |
| CN106676831A (en) * | 2015-11-11 | 2017-05-17 | 无锡小天鹅股份有限公司 | Washing machine door lock state detecting method and system and washing machine |
| CN110827525A (en) * | 2018-08-12 | 2020-02-21 | 怀化学院 | Wireless transmission's gate outage device |
-
2012
- 2012-10-23 CN CN 201220544335 patent/CN202904281U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104268967A (en) * | 2014-09-29 | 2015-01-07 | 深圳市爱普特微电子有限公司 | Safety entrance guard method and device based on capacitance-type sensor |
| CN106676831A (en) * | 2015-11-11 | 2017-05-17 | 无锡小天鹅股份有限公司 | Washing machine door lock state detecting method and system and washing machine |
| CN106676831B (en) * | 2015-11-11 | 2019-04-16 | 无锡小天鹅股份有限公司 | Door lock state detection method, system and the washing machine of washing machine |
| CN110827525A (en) * | 2018-08-12 | 2020-02-21 | 怀化学院 | Wireless transmission's gate outage device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |