CN106655130A - Protective circuit for elevator calling panel - Google Patents
Protective circuit for elevator calling panel Download PDFInfo
- Publication number
- CN106655130A CN106655130A CN201610911071.6A CN201610911071A CN106655130A CN 106655130 A CN106655130 A CN 106655130A CN 201610911071 A CN201610911071 A CN 201610911071A CN 106655130 A CN106655130 A CN 106655130A
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- China
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- resistance
- npn transistor
- feet
- electric capacity
- chip
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
Abstract
The invention discloses a protective circuit for an elevator calling panel. The protective circuit comprises the components of a static detecting and discharging circuit which detects an earth potential of the elevator calling panel, after the earth potential exceeds a preset value, performing static discharging and outputting a low-level signal; a signal converting unit which receives a low-level signal and outputs a ringing control signal and an LED lamp control signal; a ringing circuit which receives a ringing control signal and realizes a ringing function; and an LED lamp which receives an LED lamp control signal and realizes an LED lamp lighting function. The protective circuit has advantages of simple circuit structure, low cost and high stability in operation.
Description
Technical field
The present invention relates to elevators field, more particularly to a kind of protection circuit for elevator call panel.
Background technology
With the fast development of China's economy, the development of urbanization is more and more faster, increasing high building stand and
Rise.With increasing for skyscraper, elevator quantity is also at Rapid development stage, and China has become world's elevator
One big manufacturing country and the first big elevator country of consumption.And elevator is the electromechanical equipment commonly used in architectural electricity, therefore, elevator in recent years
Safety is more and more paid attention to.
The electronic building brick of elevator will develop towards the direction such as high current power and low switching module, and towards integrated electricity
Lu Hua.However, the electrostatic discharges problem forgotten by people always in this field is but still present, and integrated circuit is very
Easily it is subject to electrostatic and damages, especially as the progress of Technology, some is used for increasing the technology of circuit running speed, such as
Channel shortens, grid oxic horizon is thinning, metal silicide use, and for mitigating the technology of hot carrier's effect, makes on the contrary
The static discharge tolerance for obtaining integrated circuit declines to a great extent.
In addition, due to the presence of electrostatic, elevator call panel be people it is commonly used where, along with surrounding ring
Border and the presence of electric leakage factor, when people use, have brought serious inconvenient and potential safety hazard.
The content of the invention
The present invention goal of the invention be：Solve elevator call panel electrostatic and earth leakage protective, release and point out ask
Topic.
To achieve these goals, the technical solution used in the present invention is：
A kind of protection circuit for elevator call panel, including
Electrostatic detection and release circuit：The potential to ground of detection elevator call panel, potential to ground exceedes after setting value, enters
Row Electro-static Driven Comb, and export low level signal；
Signal conversion unit：Low level signal is received, the control signal of ring control signal and LED is exported；
Ringing circuit：Ring control signal is received, ringer function is realized；
LED illuminating circuit：The control signal of LED is received, that realizes LED lights function.
Further scheme is：Electrostatic detection and release circuit include diode D1, diode D2, PNP transistor Q1
With NPN transistor Q2, the negative electrode of the emitter stage connection diode D2 of PNP transistor Q1, two poles of ground level connection of PNP transistor Q1
The anode of pipe D2, the two ends of diode D2 are parallel with successively electric capacity C2 and resistance R4, the colelctor electrode connection NPN of PNP transistor Q1
The ground level of transistor Q2, the ground level of PNP transistor Q1 is also connected with the colelctor electrode of NPN transistor Q2, the current collection of PNP transistor Q1
Pole connects the base stage of NPN transistor Q2, and the emitter stage of NPN transistor Q2 is connected with resistance R6 and electric capacity C3, resistance R6 and electric capacity
The other end ground connection of C3, the base stage of NPN transistor Q2 is also associated with one end of resistance R5, electric capacity C1 and resistance R3, resistance R5 and
The other end ground connection of electric capacity C1；The anode of the diode D1 has been sequentially connected in series resistance R1 and resistance R2, and resistance R2's is another
One end is grounded, and the other end that tie point connects resistance R3 is drawn between resistance R1 and resistance R2 junction points；The PNP transistor
The transmitting of Q1 extremely outfan, the negative electrode of diode is connected to call panel collection potential.
Further scheme is：Signal conversion unit adopts single-chip microcomputer, model to select to be STC89C51.
Further scheme is：Ringing circuit includes that chip U1, swept resistance R8, power supply VCC2, ring LB, NPN are brilliant
Body pipe Q3 and NPN transistor Q4, chip U1 select 555 intervalometers, 7 feet of chip U1 to connect the emitter stage of NPN transistor Q3,
The colelctor electrode connection power supply VCC2 of NPN transistor Q3, the ground level of NPN transistor Q3 connects 39 feet of single-chip microcomputer, 7 feet of chip U1
Resistance R7 is also associated with, the other end of resistance R7 connects one end of swept resistance R8, and the other end of swept resistance R8 is connected with electricity
Hold C4, the other end ground connection of electric capacity C4 draws the 2 of the second branch road connection chip U1 between swept resistance R8 and electric capacity C4 junction points
The 3 feet connection ring LB's of foot and 6 feet, the 1 foot ground connection of chip U1,4 feet of chip U1 and 8 feet connection power supply VCC2, chip U1
One end, the other end ground connection of ring LB, 3 feet of chip U1 are also associated with the another of inductance L1 and electric capacity C5, inductance L1 and electric capacity C5
One end is grounded.
Further scheme is：LED illuminating circuit includes LED1, NPN transistor Q4, the anode connection power supply of LED1
The negative electrode of VCC2, LED1 connects the colelctor electrode of NPN transistor Q4, and the ground level of NPN transistor Q4 connects 34 feet of single-chip microcomputer, NPN
It is grounded after the emitter stage of transistor Q4 also series resistance R9.
In sum, as a result of above-mentioned technical proposal, the invention has the beneficial effects as follows：
The circuit structure is simple, low cost, working stability, when the potential on call panel exceedes the reverse electricity of diode D1
During pressure, its resistance declines rapidly, and reverse-conducting is discharged, and makes to produce voltage on resistance R2, through electric capacity C1 filtering, make Q1 and
Q2 is turned on, and is exported and is given single-chip microcomputer low level, and single-chip microcomputer changes signal to 555 intervalometers, and 555 intervalometers produce audio frequency concussion,
Buzzer sends alarm sound, it is to avoid the generation of the alarmed behavior of passenger, two ends the shunt inductance L and electric capacity C2 of buzzer LB, and
Connection electric capacity and inductance avoid the voltage and current at buzzer two ends from undergoing mutation, and absorb surge voltage and electric current, protect buzzer
Safety；Resistance R1 and slide rheostat R2 is also set up between the port 2 and port 7 of 555 intervalometers, for shunting.
Description of the drawings
Fig. 1 is circuit theory diagrams of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Embodiment 1
A kind of protection circuit for elevator call panel, including
Electrostatic detection and release circuit 1：The potential to ground of detection elevator call panel, potential to ground exceedes after setting value,
Electro-static Driven Comb is carried out, and exports low level signal；Signal conversion unit 2：Receive low level signal, output ring control signal and
The control signal of LED；Ringing circuit 3：Ring control signal is received, ringer function is realized；LED illuminating circuit 4：Receive
The control signal of LED, realize LED lights function.
Further scheme is：Electrostatic detection and release circuit include diode D1, diode D2, PNP transistor Q1
With NPN transistor Q2, the negative electrode of the emitter stage connection diode D2 of PNP transistor Q1, two poles of ground level connection of PNP transistor Q1
The anode of pipe D2, the two ends of diode D2 are parallel with successively electric capacity C2 and resistance R4, the colelctor electrode connection NPN of PNP transistor Q1
The ground level of transistor Q2, the ground level of PNP transistor Q1 is also connected with the colelctor electrode of NPN transistor Q2, the current collection of PNP transistor Q1
Pole connects the base stage of NPN transistor Q2, and the emitter stage of NPN transistor Q2 is connected with resistance R6 and electric capacity C3, resistance R6 and electric capacity
The other end ground connection of C3, the base stage of NPN transistor Q2 is also associated with one end of resistance R5, electric capacity C1 and resistance R3, resistance R5 and
The other end ground connection of electric capacity C1；The anode of the diode D1 has been sequentially connected in series resistance R1 and resistance R2, and resistance R2's is another
One end is grounded, and the other end that tie point connects resistance R3 is drawn between resistance R1 and resistance R2 junction points；The PNP transistor
The transmitting of Q1 extremely outfan, the negative electrode of diode is connected to call panel collection potential.
Further scheme is：Signal conversion unit adopts single-chip microcomputer, model to select to be STC89C51.
Further scheme is：Ringing circuit includes that chip U1, swept resistance R8, power supply VCC2, ring LB, NPN are brilliant
Body pipe Q3 and NPN transistor Q4, chip U1 select 555 intervalometers, 7 feet of chip U1 to connect the emitter stage of NPN transistor Q3,
The colelctor electrode connection power supply VCC2 of NPN transistor Q3, the ground level of NPN transistor Q3 connects 39 feet of single-chip microcomputer, 7 feet of chip U1
Resistance R7 is also associated with, the other end of resistance R7 connects one end of swept resistance R8, and the other end of swept resistance R8 is connected with electricity
Hold C4, the other end ground connection of electric capacity C4 draws the 2 of the second branch road connection chip U1 between swept resistance R8 and electric capacity C4 junction points
The 3 feet connection ring LB's of foot and 6 feet, the 1 foot ground connection of chip U1,4 feet of chip U1 and 8 feet connection power supply VCC2, chip U1
One end, the other end ground connection of ring LB, 3 feet of chip U1 are also associated with the another of inductance L1 and electric capacity C5, inductance L1 and electric capacity C5
One end is grounded.
Further scheme is：LED illuminating circuit includes LED1, NPN transistor Q4, the anode connection power supply of LED1
The negative electrode of VCC2, LED1 connects the colelctor electrode of NPN transistor Q4, and the ground level of NPN transistor Q4 connects 34 feet of single-chip microcomputer, NPN
It is grounded after the emitter stage of transistor Q4 also series resistance R9.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (5)
1. a kind of protection circuit for elevator call panel, it is characterised in that include
Electrostatic detection and release circuit：The potential to ground of detection elevator call panel, potential to ground exceedes after setting value, carries out quiet
Electricity release, and export low level signal；
Signal conversion unit：Low level signal is received, the control signal of ring control signal and LED is exported；
Ringing circuit：Ring control signal is received, ringer function is realized；
LED illuminating circuit：The control signal of LED is received, that realizes LED lights function.
2. as claimed in claim 1 a kind of protection circuit for elevator call panel, it is characterised in that electrostatic detection and release
Circuit includes diode D1, diode D2, PNP transistor Q1 and NPN transistor Q2, the emitter stage connection two of PNP transistor Q1
The negative electrode of pole pipe D2, the ground level of PNP transistor Q1 connects the anode of diode D2, and the two ends of diode D2 are parallel with successively electric capacity
C2 and resistance R4, the colelctor electrode of PNP transistor Q1 connects the ground level of NPN transistor Q2, and the ground level of PNP transistor Q1 is also connected with
The colelctor electrode of NPN transistor Q2, the colelctor electrode of PNP transistor Q1 connects the base stage of NPN transistor Q2, NPN transistor Q2's
Emitter stage is connected with the other end ground connection of resistance R6 and electric capacity C3, resistance R6 and electric capacity C3, and the base stage of NPN transistor Q2 is also connected with
There is the other end ground connection of one end of resistance R5, electric capacity C1 and resistance R3, resistance R5 and electric capacity C1；The anode of the diode D1 according to
Secondary to be connected in series with resistance R1 and resistance R2, the other end ground connection of resistance R2 draws the between resistance R1 and resistance R2 junction points
One branch road connects the other end of resistance R3；The transmitting of PNP transistor Q1 extremely outfan.
3. as claimed in claim 1 a kind of protection circuit for elevator call panel, it is characterised in that signal conversion unit is adopted
With single-chip microcomputer, model selection is STC89C51.
4. as claimed in claim 3 a kind of protection circuit for elevator call panel, it is characterised in that ringing circuit includes core
Piece U1, swept resistance R8, power supply VCC2, ring LB, NPN transistor Q3 and NPN transistor Q4, chip U1 selects 555 intervalometers,
7 feet of chip U1 connect the emitter stage of NPN transistor Q3, the colelctor electrode connection power supply VCC2 of NPN transistor Q3, NPN transistor
The ground level of Q3 connects 39 feet of single-chip microcomputer, and 7 feet of chip U1 are also associated with resistance R7, the other end connection swept resistance of resistance R7
One end of R8, the other end of swept resistance R8 is connected with electric capacity C4, the other end ground connection of electric capacity C4, swept resistance R8 and electric capacity C4
2 feet and 6 feet of the second branch road connection chip U1, the 1 foot ground connection of chip U1,4 feet of chip U1 and 8 feet company are drawn between junction point
Power supply VCC2 is met, 3 feet of chip U1 connect one end of ring LB, and the other end ground connection of ring LB, 3 feet of chip U1 are also associated with
The other end ground connection of inductance L1 and electric capacity C5, inductance L1 and electric capacity C5.
5. as claimed in claim 4 a kind of protection circuit for elevator call panel, it is characterised in that
LED illuminating circuit includes LED1, NPN transistor Q4, the anode connection power supply VCC2 of LED1, the negative electrode connection of LED1
The colelctor electrode of NPN transistor Q4, the ground level of NPN transistor Q4 connects 34 feet of single-chip microcomputer, and the emitter stage of NPN transistor Q4 is also gone here and there
It is grounded after connection resistance R9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911071.6A CN106655130B (en) | 2016-10-19 | 2016-10-19 | A kind of protection circuit for elevator call panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911071.6A CN106655130B (en) | 2016-10-19 | 2016-10-19 | A kind of protection circuit for elevator call panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106655130A true CN106655130A (en) | 2017-05-10 |
| CN106655130B CN106655130B (en) | 2019-07-12 |
Family
ID=58855967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610911071.6A Active CN106655130B (en) | 2016-10-19 | 2016-10-19 | A kind of protection circuit for elevator call panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106655130B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709870A (en) * | 2012-06-13 | 2012-10-03 | 青岛海信电器股份有限公司 | Power supply protection circuit and electronic product |
| CN104022486A (en) * | 2014-06-25 | 2014-09-03 | 代青扩 | Domestic multifunctional electricity protector |
| CN104158147A (en) * | 2013-05-14 | 2014-11-19 | 海洋王（东莞）照明科技有限公司 | Overvoltage protection circuit and electronic equipment |
| CN105048404A (en) * | 2015-07-13 | 2015-11-11 | 山东超越数控电子有限公司 | Power supply overvoltage protection method based on triode latch circuit |
| CN205647249U (en) * | 2016-03-15 | 2016-10-12 | 深圳市共进电子股份有限公司 | Overvoltage crowbar and switching power supply circuit |
-
2016
- 2016-10-19 CN CN201610911071.6A patent/CN106655130B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709870A (en) * | 2012-06-13 | 2012-10-03 | 青岛海信电器股份有限公司 | Power supply protection circuit and electronic product |
| CN104158147A (en) * | 2013-05-14 | 2014-11-19 | 海洋王（东莞）照明科技有限公司 | Overvoltage protection circuit and electronic equipment |
| CN104022486A (en) * | 2014-06-25 | 2014-09-03 | 代青扩 | Domestic multifunctional electricity protector |
| CN105048404A (en) * | 2015-07-13 | 2015-11-11 | 山东超越数控电子有限公司 | Power supply overvoltage protection method based on triode latch circuit |
| CN205647249U (en) * | 2016-03-15 | 2016-10-12 | 深圳市共进电子股份有限公司 | Overvoltage crowbar and switching power supply circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106655130B (en) | 2019-07-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190610 Address after: 215234 Gangdong Development Zone, Qidu Town, Wujiang District, Suzhou City, Jiangsu Province Applicant after: JIANGSU PIAGER ELEVATOR CO., LTD. Address before: 610047 35 13, 1 building, 20 Jialing Road, Wuhou District, Chengdu, Sichuan. Applicant before: Chengdu Shang Zhi Hengda Technology Co. Ltd. |
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| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |