CN104408868A - Alarming device of electronic equipment - Google Patents
Alarming device of electronic equipment Download PDFInfo
- Publication number
- CN104408868A CN104408868A CN201410674818.1A CN201410674818A CN104408868A CN 104408868 A CN104408868 A CN 104408868A CN 201410674818 A CN201410674818 A CN 201410674818A CN 104408868 A CN104408868 A CN 104408868A
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- CN
- China
- Prior art keywords
- operational amplifier
- electrically connected
- input end
- resistance
- phase input
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/58—Safety devices
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Alarm Devices (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention discloses an alarming device of electronic equipment. The in-phase input end and the inverse-phase input end of a first operational amplifier are grounded; the in-phase input end of a second operational amplifier is electrically connected to a sensing metal sheet and electrically connected to the in-phase input end of the second operational amplifier; the in-phase input end of the third operational amplifier is electrically connected to the output end of the first operational amplifier; the inverse-phase input end of the third operational amplifier is electrically connected to that of the second operational amplifier; the first input end and the second input are electrically connected to the output ends of the second and third operational amplifiers; the output end of an exclusive-OR gate chip is electrically connected to the in-phase input end of a comparator; the inverse-phase input end of the comparator is electrically connected to a regulating end; the first end receives DC voltage and the second end is grounded; and the output end of the comparator is electrically connected to a buzzer.
Description
Technical field
The present invention relates to a kind of electronic equipment warning device, particularly a kind of can at the electronic equipment warning device of sensed thing near specific region alarm.
Background technology
Traditional water dispenser is typically provided with the button of a control water fountain effluent, this button controls the water outlet of water dispenser by an opening/closing control device.The discharging device of water dispenser can be opened when this button is pressed, this duration is pressed this button and the discharging device of water dispenser can be kept to continue water outlet.Traditional button is easily touched triggering easily, hot water can be made to flow out, easily cause child to be burned when child opens this button because of false touch.
Summary of the invention
The technical problem to be solved in the present invention there is provided a kind of can at the electronic equipment warning device of sensing object near specific region alarm.
Technical scheme of the present invention is as follows:
A kind of electronic equipment warning device, in order to point out near specific region alarm at sensing object, described electronic equipment warning device comprises one first operational amplifier, one second operational amplifier, one the 3rd operational amplifier, one XOR gate chip, one comparer and an induction metal plate, the in-phase input end of described first operational amplifier and reverse inter-input-ing ending grounding, the in-phase input end of described second operational amplifier is electrically connected described induction metal plate, the in-phase input end of described second operational amplifier is electrically connected the in-phase input end of described second operational amplifier, the in-phase input end of described 3rd operational amplifier is electrically connected the output terminal of described first operational amplifier, the inverting input of described 3rd operational amplifier is electrically connected the inverting input of described second operational amplifier, described XOR gate chip comprises a first input end, one second input end and an output terminal, described variable resistor comprises a first end, one second end and an adjustable side, described first input end and the second input end are electrically connected the output terminal of described second operational amplifier and the 3rd operational amplifier respectively, the output terminal of described XOR gate chip is electrically connected the in-phase input end of described comparer, the inverting input of described comparer is electrically connected described adjustable side, described first end receives a DC voltage, described second end ground connection, the output terminal of described comparer is electrically connected a hummer.
Preferably, described electronic equipment warning device also comprises a crystal oscillator, one first resistance and one first electric capacity, the in-phase input end of described first operational amplifier and inverting input are respectively via described first resistance and the first capacity earth, and the in-phase input end of described first operational amplifier is also electrically connected the output terminal of the first operational amplifier via described crystal oscillator.
Preferably, described electronic equipment warning device also comprises one second resistance, one the 3rd resistance, one the 4th resistance and one second electric capacity, the in-phase input end of described second operational amplifier is electrically connected described induction metal plate via described second resistance, the in-phase input end of described second operational amplifier is electrically connected one end of the second electric capacity via described second resistance, the other end ground connection of described second electric capacity, the in-phase input end of described 3rd operational amplifier is electrically connected one end of the 4th resistance via described 3rd resistance, the other end of described 4th resistance is electrically connected the in-phase input end of described second operational amplifier, the in-phase input end of described 3rd operational amplifier is electrically connected the output terminal of described first operational amplifier via the 3rd resistance.
Preferably, described electronic equipment warning device also comprises one the 5th resistance and one the 3rd electric capacity, and one end of described 5th resistance is electrically connected the output terminal of described XOR gate chip, and the other end of described 5th resistance is via described 3rd capacity earth.
Preferably, the in-phase input end of described comparer is electrically connected the connected node between described 5th resistance and the 3rd electric capacity.
Preferably, the size of described DC voltage is+24V, and described induction metal plate is installed on the water delivering orifice position of a water dispenser, and described hummer is positioned at described water dispenser.
Beneficial effect: electronic equipment warning device of the present invention is electrically connected the output terminal of described second operational amplifier and the 3rd operational amplifier respectively by described first input end and the second input end, the output terminal of described XOR gate chip is electrically connected the in-phase input end of described comparer, the inverting input of described comparer is electrically connected described adjustable side, described first end receives a DC voltage, described second end ground connection, the output terminal of described comparer is electrically connected described hummer, when distance between sensed thing and induction metal plate is less than critical distance, described buzzer warning prompting.
Accompanying drawing explanation
Fig. 1 is a circuit diagram of electronic equipment warning device of the present invention preferred embodiment.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Using method of the present invention is as follows:
Refer to Fig. 1, electronic equipment warning device of the present invention, in order to point out near specific region alarm at sensed thing, comprises one first operational amplifier U1, one second operational amplifier U2, one the 3rd operational amplifier U3, an XOR gate chip U4, a comparer U5, induction metal plate 100, crystal oscillator X, one first resistance R1, one second resistance R2, one the 3rd resistance R3, one the 4th resistance R4, one the 5th resistance R5, one first electric capacity C1, one second electric capacity C2, one a 3rd electric capacity C3 and variable resistor VR.
The in-phase input end of described first operational amplifier U1 and inverting input are respectively via described first resistance R1 and the first electric capacity C1 ground connection.The in-phase input end of described first operational amplifier U1 is also electrically connected the output terminal of the first operational amplifier U1 via described crystal oscillator X.
The in-phase input end of described second operational amplifier U2 is electrically connected described induction metal plate 100 to detect the distance of sensed thing and this induction installation via described second resistance R2.The in-phase input end of described second operational amplifier U2 is also electrically connected one end of the second electric capacity C2 via described second resistance R2.The other end ground connection of described second electric capacity C2.The in-phase input end of described 3rd operational amplifier U3 is electrically connected one end of the 4th resistance R4 via described 3rd resistance R3.The other end of described 4th resistance R4 is electrically connected the in-phase input end of described second operational amplifier U2.The in-phase input end of described 3rd operational amplifier U3 is also electrically connected the output terminal of described first operational amplifier U1 via the 3rd resistance R3.The inverting input of described 3rd operational amplifier U3 is electrically connected the inverting input of described second operational amplifier U2.
Described XOR gate chip U4 comprises a first input end P1, one second input end P2 and an output terminal P3.Described first input end P1 and the second input end P2 is electrically connected the output terminal of described second operational amplifier U2 and the 3rd operational amplifier U3 respectively.One end of described 5th resistance R5 is electrically connected the output terminal P3 of described XOR gate chip U4.The other end of described 5th resistance R5 is via described 3rd electric capacity C3 ground connection.
Described variable resistor VR comprises a first end, one second end and an adjustable side.The in-phase input end of described comparer U5 is electrically connected the connected node between described 5th resistance R5 and the 3rd electric capacity C3.The inverting input of described comparer U5 is electrically connected the adjustable side of described variable resistor VR.The first end of described variable resistor VR receives+24V a DC voltage.The second end ground connection of described variable resistor RP.The output terminal of described comparer U5 is electrically connected a hummer 200.Wherein, described induction metal plate 100 is installed on the water delivering orifice position of a water dispenser 300.Described hummer 200 is positioned at described water dispenser 300.
During work, when described induction metal plate 100 has detected sensed thing near this induction installation, between described sensed thing and induction metal plate 100, form a dynamic capacity.The capacitance size of described dynamic capacity increases along with the reduction of the distance between described sensed thing and induction metal plate 100.Parallel relationship is formed between described dynamic capacity and the second electric capacity C2.When the capacitance of described dynamic capacity increases, the shunt capacitance value of described dynamic capacity and the second electric capacity C2 also increases thereupon.Described 4th resistance R4, the second electric capacity C2 and induction metal plate 100 form a delay circuit at the in-phase input end of described second operational amplifier U2.
The oscillator signal that described first operational amplifier U1 produces is inputted described second operational amplifier U2 by time delay.The oscillator signal that described signal generating circuit 100 produces is not inputted described 3rd operational amplifier U3 by time delay.There is a phase differential between the signal of the output terminal output of described second operational amplifier U2 and the 3rd operational amplifier U3, make the first input end P1 of described XOR gate chip U4 different with the input signal of the second input end P2.The signal that now the output terminal P3 of described XOR gate chip U4 exports is high level.The signal of described high level is converted to a linear DC voltage through the 5th resistance R5 and the 3rd electric capacity C3.
Phase differential between the signal that the dutycycle size of the level signal that the output terminal P3 of described XOR gate chip U4 exports and the output terminal of described second operational amplifier U2 and the 3rd operational amplifier U3 export is directly proportional.Distance between described sensed thing and induction metal plate 100 is less, and the dutycycle of the level signal of the output terminal P3 output of described XOR gate chip U4 is larger, and the linear DC voltage after described 5th resistance R5 and the 3rd electric capacity C3 changes is larger.
Described DC voltage produces a reference voltage via variable resistor VR at the inverting input of described comparer U5.When linear DC voltage after changing through described 5th resistance R5 and the 3rd electric capacity C3 is greater than described reference voltage, the control signal of the output terminal output noble potential of described comparer U5 drives described hummer 200 sounding alarm to note to remind user.Its resistance size can be changed by the position of the adjustable side regulating described variable resistor VR, thus can regulate the size of described reference voltage, and then can the warning critical distance that sensed thing fills near this induction be regulated.In another better embodiment of the present invention, described hummer 200 also can be light-emitting component and notes in order to remind user.
These are only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing instructions of the present invention and accompanying drawing content to do, is directly or indirectly used in the technical field that other are relevant, all in like manner within scope of patent protection of the present invention.
Claims (6)
1. an electronic equipment warning device, in order to point out near specific region alarm at sensed thing, described electronic equipment warning device comprises one first operational amplifier, one second operational amplifier, one the 3rd operational amplifier, one XOR gate chip, one comparer and an induction metal plate, it is characterized in that: the in-phase input end of described first operational amplifier and reverse inter-input-ing ending grounding, the in-phase input end of described second operational amplifier is electrically connected described induction metal plate, the in-phase input end of described second operational amplifier is electrically connected the in-phase input end of described second operational amplifier, the in-phase input end of described 3rd operational amplifier is electrically connected the output terminal of described first operational amplifier, the inverting input of described 3rd operational amplifier is electrically connected the inverting input of described second operational amplifier, described XOR gate chip comprises a first input end, one second input end and an output terminal, described variable resistor comprises a first end, one second end and an adjustable side, described first input end and the second input end are electrically connected the output terminal of described second operational amplifier and the 3rd operational amplifier respectively, the output terminal of described XOR gate chip is electrically connected the in-phase input end of described comparer, the inverting input of described comparer is electrically connected described adjustable side, described first end receives a DC voltage, described second end ground connection, the output terminal of described comparer is electrically connected a hummer.
2. electronic equipment warning device as claimed in claim 1, it is characterized in that: described electronic equipment warning device also comprises a crystal oscillator, one first resistance and one first electric capacity, the in-phase input end of described first operational amplifier and inverting input are respectively via described first resistance and the first capacity earth, and the in-phase input end of described first operational amplifier is also electrically connected the output terminal of the first operational amplifier via described crystal oscillator.
3. electronic equipment warning device as claimed in claim 2, it is characterized in that: described electronic equipment warning device also comprises one second resistance, one the 3rd resistance, one the 4th resistance and one second electric capacity, the in-phase input end of described second operational amplifier is electrically connected described induction metal plate via described second resistance, the in-phase input end of described second operational amplifier is electrically connected one end of the second electric capacity via described second resistance, the other end ground connection of described second electric capacity, the in-phase input end of described 3rd operational amplifier is electrically connected one end of the 4th resistance via described 3rd resistance, the other end of described 4th resistance is electrically connected the in-phase input end of described second operational amplifier, the in-phase input end of described 3rd operational amplifier is electrically connected the output terminal of described first operational amplifier via the 3rd resistance.
4. electronic equipment warning device as claimed in claim 3, it is characterized in that: described electronic equipment warning device also comprises one the 5th resistance and one the 3rd electric capacity, one end of described 5th resistance is electrically connected the output terminal of described XOR gate chip, and the other end of described 5th resistance is via described 3rd capacity earth.
5. electronic equipment warning device as claimed in claim 4, is characterized in that: the in-phase input end of described comparer is electrically connected the connected node between described 5th resistance and the 3rd electric capacity.
6. electronic equipment warning device as claimed in claim 5, is characterized in that: the size of described DC voltage is+24V, and described induction metal plate is installed on the water delivering orifice position of a water dispenser, and described hummer is positioned at described water dispenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410674818.1A CN104408868A (en) | 2014-11-21 | 2014-11-21 | Alarming device of electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410674818.1A CN104408868A (en) | 2014-11-21 | 2014-11-21 | Alarming device of electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104408868A true CN104408868A (en) | 2015-03-11 |
Family
ID=52646494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410674818.1A Pending CN104408868A (en) | 2014-11-21 | 2014-11-21 | Alarming device of electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104408868A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110152117A (en) * | 2019-04-26 | 2019-08-23 | 杭州电子科技大学 | A kind of venous transfusion detection device and its detection method |
-
2014
- 2014-11-21 CN CN201410674818.1A patent/CN104408868A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110152117A (en) * | 2019-04-26 | 2019-08-23 | 杭州电子科技大学 | A kind of venous transfusion detection device and its detection method |
| CN110152117B (en) * | 2019-04-26 | 2021-05-04 | 杭州电子科技大学 | Venous transfusion detection device and detection method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150311 |
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| WD01 | Invention patent application deemed withdrawn after publication |