CN111343763A - Elevator emergency lighting system and working method thereof - Google Patents
Elevator emergency lighting system and working method thereof Download PDFInfo
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- CN111343763A CN111343763A CN202010139293.7A CN202010139293A CN111343763A CN 111343763 A CN111343763 A CN 111343763A CN 202010139293 A CN202010139293 A CN 202010139293A CN 111343763 A CN111343763 A CN 111343763A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/02—Cages, i.e. cars
- B66B11/0226—Constructional features, e.g. walls assembly, decorative panels, comfort equipment, thermal or sound insulation
- B66B11/0233—Lighting systems
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- 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
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Elevator Control (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
An elevator emergency lighting system comprising: the system comprises a control chip, a car lighting source fault detection circuit module, a mains supply power failure detection circuit and a battery voltage and battery charging detection circuit; the car lighting source fault detection circuit module at least comprises: the LED illuminating lamp constant current driving circuit and the car illumination detection circuit are connected with the LED illuminating lamp constant current driving circuit; the car illumination detection circuit is used for acquiring illumination in the car, converting the illumination into an illumination signal which can be identified by the control chip, and judging whether to start the standby LED light source by driving the LED illuminating lamp constant-current driving circuit according to the acquired illumination intensity. Aiming at the fault of the lighting source of the lift car, the system can still automatically start the standby light source and carry out alarm processing; the problem that the working time of emergency lighting cannot be verified in the conventional maintenance process can be effectively solved; the fault type of the emergency power supply can be automatically identified, the cost for integrally replacing the emergency power supply is greatly saved, the overhauling efficiency is improved, and the emergency power supply is energy-saving and environment-friendly.
Description
Technical Field
The invention discloses an elevator emergency lighting system and a working method thereof, and belongs to the technical field of elevator emergency lighting systems.
Background
Along with the improvement of public safety consciousness, the safety supervision to the elevator is also stricter and stricter, and the elevator range of application is bigger and bigger, consequently, also provides higher technical requirement for maintenance, has following technical problem in current elevator emergency lighting system:
1. the starting condition of the emergency light source is single, and the requirement of safe operation of the elevator is difficult to meet
The failure of the car lighting source, i.e. the damage of the lighting lamp or the reduction of the illumination thereof, cannot satisfy the regulations of GB 7588 and 2003, items 8.17.1 and 8.17.3, which are also the most common lighting failures. At present, an emergency lighting system of an elevator does not take countermeasures for the fault, so that people cannot clearly see the condition in a car when taking the elevator, cannot conveniently register signals in the car, and easily causes the risk of panic and collision of passengers.
2. The conventional emergency lighting power supply cannot judge whether the battery power can maintain the emergency lamp to work for more than 1h, and when the working time is less than 1h, the regulation of GB 7588 and 2003 No. 8.17.4 cannot be met. In the daily maintenance process, when the car is inspected for emergency lighting, the normal car lighting power supply is generally disconnected to verify the function of emergency lighting, the working time of the emergency lighting cannot be verified, and once a passenger encounters a fault such as power failure of the elevator, the emergency lighting power supply cannot maintain a certain working time of the emergency lamp, so that the panic psychological state of trapped people can be aggravated.
3. When the emergency power supply fails, a maintainer can hardly determine whether the charging circuit of the emergency power supply or the charging battery fails. When a maintenance person finds that the emergency power supply has a fault, the maintenance person cannot quickly judge which part is damaged. The emergency power supply is replaced integrally under the general condition, so that not only is the resource waste caused, but also the replacement cost of elevator use units is increased.
Although the prior art has been directed to elevator emergency lighting systems with related improvements, there is still no complete solution to the above technical problems.
For example: chinese patent document CN107172740A discloses a LED emergency lighting lamp driving system, which includes an AC/DC constant voltage driving circuit, an input power selection auxiliary circuit, an LED driving circuit, an LED emergency lamp and a battery charging circuit, wherein the output end of the AC/DC constant voltage driving circuit is electrically connected to the input power selection auxiliary circuit, the AC/DC constant voltage driving circuit adopts a switching power supply circuit with a Buck topology structure, the switching power supply circuit converts 220V voltage into 12V voltage for output, the energy conversion efficiency is high, the battery charging circuit selects the auxiliary circuit to indirectly supply power through the input power, the input power selection auxiliary circuit is electrically connected to a DC power device and the LED driving circuit in turn, the power design topology structure is simple, the driving system can adapt to the driving requirements of different elevators or different companies equipped with LED emergency lamps with different powers, and the circuit has practical, energy-saving, long service life, and practical, High reliability and the like. However, this patent document is only one driving circuit for driving the emergency LED lighting lamp, and is used to drive the LED lighting lamp to start up when the commercial power is lost. Thus, in contrast to the present invention, this patent document does not address the problem of starting an emergency light when the light source fails; the working time of the emergency lamp cannot be judged, and whether the working time meets the requirements of national standards or not can be judged; when it is impossible to determine which part of the emergency system has failed.
US patent document US8558407B2 discloses an elevator emergency LED lighting power supply assembly including an inverter that receives DC power from a battery and outputs backup power to LED lamps of an elevator lighting system. The LED drive is connected to the inverter, is connectable to LED lights of the elevator lighting system, receives AC power from the inverter, and outputs DC power sufficient to power the LED lights. The relay is connected between the inverter and the LED driver, is connectable to the main elevator power supply, and allows AC power to flow from the main elevator power supply to the elevator lighting system LEDs through the LED driver, as long as AC power is available from the main elevator power supply. When the main elevator power supply is de-energized, the relay switches the contacts and provides AC power received from the inverter to the LED driver. This patent document has solved the elevator power and has normally and give the power supply problem of LED light after the power outage for the drive only responds to the electric power system of LED emergency lighting lamp.
Chinese patent document CN104982094B relates to a lighting device, in particular for emergency lighting and/or safety lighting, having at least one light source with a light emitter. The invention further relates to a method for determining a functional state of a lighting device. Such an electrical emergency and/or safety device is, for example, emergency lighting, which indicates emergency exits to persons and/or provides at least weak lighting in corridors and/or elevators, in particular in public buildings. Electrical emergency and/or safety lighting devices should ensure continuity for safety reasons.
In order to ensure the function of such emergency lighting, the emergency lighting lamp of the emergency lighting must be periodically checked. But the detection of all emergency lights of a building can be very costly due to the size of the building. In addition, and also not always, all rooms can be accessed. In addition, it is not always possible to detect the full function of the illumination lamp by simply turning on and off. The lighting device is used for emergency lighting and/or safety lighting, and comprises at least one light source, the light source is provided with a luminous body, wherein the at least one light source comprises a defined impedance connected in front of the luminous body, and a checking device is arranged to measure the input impedance of the at least one light source, wherein the defined impedance and the characteristic impedance of the luminous body determine the input impedance of the at least one light source, the checking device comprises a processing unit, the processing unit provides a high-frequency signal for measuring the input impedance, the input impedance is measured in a reference state and an operating state of the at least one light source respectively, and the at least one light source is turned off in the reference state and is turned on in the operating state; the method for determining a functional status of a configuration of a plurality of light sources of the above lighting device for emergency and/or safety lighting, comprising: measuring a first impedance value of the light source configuration in a reference state, the measured first impedance value being stored as a reference value, repeatedly measuring a second impedance value of the emergency lighting in an operational state, comparing the second impedance value with the first impedance value, and determining a functional state based on the result of the comparison. However, this patent document only addresses the detection technology of the function of whether the emergency light source is operating normally. Failure to address the problem of starting an emergency light when the light source fails; the working time of the emergency lamp cannot be judged, and whether the working time meets the requirements of national standards or not can be judged; when the emergency system fails, which part fails can not be determined.
The utility model belongs to the technical field of elevator lighting, and specifically relates to a novel elevator lighting system, which comprises an external power supply, a power distribution machine room, a PLC (programmable logic controller), an elevator door front lighting switch, a car lighting LED lamp, a car emergency LED lamp and an elevator door front LED lighting lamp, wherein the external power supply is electrically connected with the power distribution machine room, the power distribution machine room is electrically connected with the PLC and the elevator door front lighting switch in an output manner, the PLC is electrically connected with a first photoelectric sensor in an input manner, so that the receiving end of the photoelectric sensor can receive infrared light emitted by the first photoelectric sensor when no person takes in the elevator and transmit the infrared light to the PLC, and meanwhile, the PLC controls the car lighting LED lamp to be powered off, thereby avoiding the problem that the existing elevator is not occupied by people during operation, the lighting system also normally works and wastes a large amount of electric power resources, is not beneficial to saving energy. However, the patent only solves the problem that when no person is in the elevator, the illumination of the elevator car is turned off to realize the energy-saving function.
Japanese patent document JP2013071795A discloses that the lighting state of an emergency light is installed in an elevator car without using a dedicated monitor for emergency light inspection. Solution a lighting device 21 in a vehicle as a power source causes power failure and a surveillance camera 26 when an elevator car 3 includes a battery 25 that rotates power with an emergency light 23. The elevator control device 1 includes an elevator control part 11, the lighting device 21 interrupting the power supply checks the emergency light 23 in the process of the car, performs switching to the battery 25 to sequentially display the emergency light 23, an image storage part 12 storing the emergency light 23 of the elevator car 3 at the lightning time acquired in the image from the monitoring camera 26, and an emergency light state determination part 13 determining the presence or absence of the emergency light 23 at the normal lighting time in advance by comparing the image stored in the image storage part 12 with a reference image. This patent document only addresses the detection technique of the function of whether the emergency light source is operating normally.
Disclosure of Invention
Aiming at the technical defects in the prior art, the invention discloses an elevator emergency lighting system.
The invention discloses a working method of the elevator emergency lighting system.
The technical scheme of the invention is as follows:
an elevator emergency lighting system, comprising: the system comprises a control chip, a car lighting source fault detection circuit module, a mains supply power failure detection circuit and a battery voltage and battery charging detection circuit;
the car lighting source fault detection circuit module at least comprises: the LED illuminating lamp constant current driving circuit and the car illumination detection circuit are connected with the LED illuminating lamp constant current driving circuit;
the car illumination detection circuit is used for acquiring illumination in the car, converting the illumination into an illumination signal which can be identified by the control chip, and judging whether to start the standby LED light source by driving the LED illuminating lamp constant-current driving circuit according to the acquired illumination intensity. The design has the advantages that through the circuit improvement design, when the car lighting source fails (the lighting lamp is damaged or the illumination intensity is reduced), the emergency lighting system can timely start the standby light source in the car, the emergency lighting system is not limited to be started under the single condition of mains supply power failure, and the panic of passengers is greatly relieved.
According to the invention, the car illumination detection circuit converts the collected illumination into a corresponding voltage signal according to the illumination intensity and transmits the voltage signal to the control chip; the car illuminance detection circuit at least comprises a photoresistor R25 and a resistor R24 which form a resistor voltage division circuit:
when no light irradiates, the resistance value of the photoresistor is increased;
when light irradiates, the resistance value of the photoresistor becomes small;
according to different light intensities, the AIN6 voltages corresponding to the cage illumination detection circuit are different; the illumination signal is automatically converted into a voltage signal and is transmitted to the control chip for processing, and the control chip compares the collected illumination signal with a preset threshold value to finally determine whether the car lighting source works normally;
when the control chip sends out an instruction to turn off all the illuminations of the elevator, the elevator car illumination detection circuit does not detect the light intensity any more, and the standby light source is prevented from being turned on; when the elevator is running again, the light intensity is detected again.
According to the invention, the cage lighting light source fault detection circuit module further comprises an alarm and indication circuit, and when the control chip starts the standby LED light source, the alarm and indication circuit gives an alarm to remind maintenance personnel to replace the fault light source in time. Preferably, D47 light detection pilot lamp lights among the warning and indicating circuit, reminds maintenance personal to change trouble light source in time.
According to the present invention, preferably, the LED lighting lamp constant current driving circuit includes a plurality of groups of LED lighting lamp constant current driving units connected in parallel, each LED lighting lamp constant current driving unit includes:
an LED constant current driving chip;
the control chip is connected with the LED constant current driving chip through a current limiting resistor R18 to control the LED illuminating lamp to be turned on and off; the power supply input end of the LED constant current driving chip is connected with a power supply through a filter capacitor; r10 is LED light current-limiting resistance, and the resistance is less, and LED light electric current is bigger, and luminance is higher.
PT4115 is LED constant current drive chip, and current limiting resistor R18 is connected to 3 feet to the singlechip, and the singlechip can control opening, closing of LED light, and 5 feet are chip power input pins, and C9 is power filter capacitor, guarantees that U5 power supply is stable. R10 is LED light current-limiting resistance, and the resistance is less, and LED light electric current is bigger, and luminance is higher. Preferably, the invention is provided with 6 groups of LED illuminating lamp constant current driving units, the power of each group of light sources is 3W, and the power of the standby light source is 18W. When the control chip detects that the illuminance is lower than a set value (the requirement of GB 7588 and 2003 is 50lx), and the elevator runs normally, the single chip microcomputer sends out an instruction to control all the LED standby light sources of all the groups to work completely.
According to the present invention, preferably, the mains power failure detection circuit includes:
VCCIN is connected with power adapter interface VCCIN, AIN3 is connected with analog channel 3 of control chip;
when the mains supply is powered off, the AIN3 is communicated with GND through a resistor R30, and the voltage of the AIN3 is 0V;
when the mains supply is normal, the resistors R27 and R30 form a resistor voltage division circuit, and the voltage of AIN3 is DC4.5V;
the control chip judges whether the commercial power exists or not by detecting the voltage of AIN 3;
when the control chip detects power failure, the control chip sends out an instruction: controlling an LED illuminating lamp constant-current driving unit to work as emergency illumination, and simultaneously lighting a state indicator lamp D45 mains supply power failure indicator lamp, a D47 light detection indicator lamp and a D50 discharge indicator lamp;
when the commercial power is normal, the car illumination detection circuit detects that the car is illuminated normally, and the control chip detects that the voltage of the AIN3 is 0V, at the moment, the state indicator lamp D45 commercial power failure indicator lamp is turned on, and then the battery charging circuit is judged to be in fault. And prompting a maintenance worker that the battery charging device needs to be replaced.
The mains supply power failure detection circuit is used for: when the commercial power has a power failure, the generated voltage signal is transmitted to the control chip for processing through the commercial power failure detection circuit: controlling the commercial power failure indicator lamp, the light ray detection indicator lamp and the discharge indicator lamp to be turned on; and controlling the standby power supply to discharge, and controlling the LED illuminating lamp to be lightened as emergency illumination through the LED illuminating lamp constant current driving circuit. When power is off, the D45 mains supply power failure indicator lamp, the D47 light detection indicator lamp and the D50 discharge indicator lamp in the figure 3 are turned on, and the lithium battery starts to discharge to drive a group of LED illuminating lamps in the figure 2 to be turned on as emergency illumination.
According to a preferred embodiment of the present invention, the battery voltage detection circuit includes: VCC is connected with a battery end VCC, a resistor R23 and a resistor R26 form a resistor voltage dividing circuit, an analog signal is transmitted to a control chip AIN5 channel, and analog-to-digital conversion is carried out to determine the voltage of two ends of the battery;
when the battery capacity of the emergency power supply is less than 80% of the maximum storage capacity of the battery, the battery is charged, and a D49 charging indicator lamp is lightened to 100% of the storage capacity;
when the voltage at VCCIN is DC12.6V, but the voltage at VCC cannot rise all the time, it is determined that the battery is faulty. Maintenance personnel need to replace the batteries.
The battery voltage and battery charging detection circuit is used for: when the battery and the battery charging circuit are in fault, the generated voltage signal is transmitted to the control chip through the battery and the battery charging circuit for processing: and the battery fault indication actuating mechanism is controlled to act, and a maintenance worker is reminded of replacing the fault battery or the charging device in time. When the battery or the battery has a charging fault, a D48 battery fault indicator lamp or a D45 mains supply power failure indicator lamp in the figure 3 is turned on, and sound alarm is given to remind maintenance personnel of replacing the faulty battery or the charging device in time.
According to a preferred embodiment of the present invention, the elevator emergency lighting system further includes an energy-saving circuit module, the energy-saving circuit module including: the elevator operation signal detection circuit, the delay adjusting circuit and the relay control circuit;
if the elevator operation signal detection circuit does not detect an elevator operation signal, the control chip sends an instruction after the delay time set in the delay adjusting circuit, the relay normally-closed point in the relay control circuit is driven to be disconnected, and the car illumination is turned off. When the elevator car stops at a landing and the power-driven automatic door is closed, if no operation instruction exists in the elevator car and a certain time delay is passed, the illumination of the elevator car is turned off so as to achieve the purpose of energy conservation.
According to the preferable embodiment of the invention, in the elevator operation signal detection circuit, the P2 is an elevator operation signal input interface, the optocoupler is isolated through U8, the detected elevator operation signal is transmitted to a PB4 channel of the singlechip corresponding to the control chip, and the singlechip drives a relay in the relay control circuit to act or not according to the signal;
in the delay adjusting circuit, analog voltage of a channel of the singlechip AIN4 corresponding to the control chip is adjusted by the control potentiometer RP1, and the singlechip drives the relay control circuit to control the delay off time of the normally closed point of the relay according to the signal. Preferably, still include electric capacity C13 and be used for the filtering anti-shake at time delay regulating circuit, utilize the charge-discharge principle of electric capacity, make the voltage signal of output more balanced when rotatory potentiometre, the singlechip of being convenient for gathers the signal. The potentiometer is rotated to different positions, the analog voltage transmitted to the single chip microcomputer AIN4 channel corresponding to the control chip is different, the higher the voltage is, the longer the delay time is, and otherwise, the shorter the delay time is.
According to the preferable mode of the invention, in the relay control circuit, when the control chip detects that the elevator has no running signal, the PB5 gives a low level, the isolation optocoupler U10 is conducted, the control triode Q2 is conducted, the relay action normally-closed point is disconnected, and the car illumination is turned off. If the elevator does not have the operation signal and after the set delay time, the control chip sends out an instruction to turn off all the illuminations of the elevator. At this moment, car illuminance detection circuitry no longer detects light intensity, prevents to open standby light source, only when the elevator moves once more, just detects light intensity, realizes energy-conserving purpose.
The invention also discloses a working method of the elevator emergency lighting system, which is characterized by comprising a brightness detection method in the elevator car:
when the lighting source in the car fails and the illumination of the light source is less than or equal to 50lx, the standby light source (the non-emergency lighting source, the power supply and the main light source) is started, and simultaneously, the sound alarm is given out to prompt personnel to replace the main light source.
According to the preferable preference of the invention, the working method further comprises a mains supply power failure detection method:
when the mains supply power failure is detected, an emergency lighting loop is automatically started, and an emergency lamp is lightened;
when detecting that the commercial power is normal, car illuminance detection circuit detects that the car illumination is normal, but when control chip detected AIN3 voltage and is 0V, state pilot lamp D45 commercial power down pilot lamp was lighted this moment, then judges battery charging circuit trouble.
According to a preferred embodiment of the present invention, the operating method further includes a battery voltage detecting method:
when the electric quantity of the battery of the emergency power supply is less than or equal to 80% of the maximum stored electric quantity of the battery, the battery is charged to 100% of the stored electric quantity, and when the electric quantity of the battery reaches 100%, the charging circuit is automatically cut off;
when the battery capacity of the emergency power supply is always maintained to be less than or equal to 50% of the maximum storage capacity of the battery, the battery is determined to be invalid, and when the equipment enters a maintenance state, a maintenance worker is prompted to replace the battery.
According to a preferred embodiment of the present invention, the operating method further includes an energy saving method:
when the elevator running signal is not detected for a fixed time, the light source in the elevator car is extinguished. The elevator enters an energy-saving mode, the illumination in the elevator car is less than or equal to 50lx at the moment, and the standby light source is not started.
The technical advantages of the invention are as follows:
1. the starting condition of the emergency light source is humanized, and the requirement of safe operation is met. Aiming at the faults of the car lighting light source, namely the damage of the lighting lamp or the reduction of the illumination intensity of the lighting lamp, the system can still automatically start the standby light source and carry out alarm processing when the regulations of GB 7588 and 2003 No. 8.17.1 and No. 8.17.3 cannot be met, thereby avoiding the danger of panic and collision of passengers due to the fact that passengers cannot see the situation in the car clearly due to the faults.
2. The system can also monitor the safe operation of the emergency power supply, and effectively solves the problem that the working time of emergency lighting cannot be verified during the conventional maintenance. When the passenger encounters faults such as power failure of the elevator, the passenger can safely obtain a continuous power supply, and public panic is avoided.
3. The system can also automatically identify the fault type of the emergency power supply, clearly distinguish the fault of the charging circuit of the emergency power supply from the fault of the charging battery, greatly save the cost of integrally replacing the emergency power supply, improve the maintenance efficiency, save energy and protect environment.
Drawings
Fig. 1 is a car illuminance detection circuit;
fig. 2 is a constant current driving unit of an LED illumination lamp;
FIG. 3 is an alarm and indication circuit;
FIG. 4 is a charging circuit;
FIG. 5 is a mains power down detection circuit;
FIG. 6 is a battery voltage detection circuit;
fig. 7 is an elevator run signal detection circuit;
FIG. 8 is a delay adjustment circuit;
FIG. 9 is a relay control circuit;
FIG. 10 is a diagram of a single-chip microcomputer minimum system;
fig. 11 is a power supply circuit.
Detailed Description
The invention is described in detail below with reference to the following examples and the accompanying drawings of the specification, but is not limited thereto.
Examples 1,
In the embodiment, the power supply of the main power supply of the elevator car is 220VAC to 12.6V and is used for supplying power to the LED illuminating lamp (a main light source and a standby light source; 18W); the emergency lighting circuit battery is designed by a 12.6V lithium battery, and the power of the emergency lamp is 3W (5730 LED); the battery capacity (80% of capacity) of the emergency power supply can be supplied to the emergency lamp for more than or equal to 2 hours. As shown in fig. 11, in the power circuit, since the voltage of the lithium battery is DC12.6V and the working voltage required by the single chip microcomputer is DC5V, DC12.6V needs to be reduced to DC5V to supply power to the single chip microcomputer. U4/78M05 is 5V steady voltage chip, can drop DC12.6V voltage to DC5V and supply power for singlechip and other peripheral hardware, and C4-C8 is the power filter electric capacity, guarantees that the power supply is stable.
In this embodiment, the control chip preferably uses an STM8S003F3P6 single chip microcomputer as a minimum system to monitor and process signals related to lighting. The control of the single chip microcomputer program can accurately, quickly and efficiently control the starting and stopping of the car illumination and the emergency illumination and the fault alarm. As shown in fig. 10, in the minimal system of the single chip microcomputer, P4 is a SWIM interface, and is connected with a burner to communicate with a computer to burn and write a program of the single chip microcomputer. The resistor R31 and the capacitor C14 form a reset circuit, and the reset circuit automatically resets the singlechip system when the singlechip system is powered on by utilizing the charge-discharge principle of the capacitor.
In order to facilitate the judgment of the working or fault condition of the elevator lighting system, the indicating function of the indicator lamp is explained as follows:
1. the commercial power failure detection indicator lamp is turned on after commercial power fails;
2. the light detection indicator lamp is turned on when the light detection circuit works;
3. the battery fault indicator lamp is turned on when the battery voltage detection circuit detects a battery fault;
4. the charging indicator lamp is lightened when the charging circuit charges the battery;
5. the discharge indicator lamp is lightened when the commercial power is cut off and the battery discharges to work;
6. when the device works normally, all the indicator lights are not on.
An elevator emergency lighting system comprising: the system comprises a control chip, a car lighting source fault detection circuit module, a mains supply power failure detection circuit and a battery voltage and battery charging detection circuit;
the car lighting source fault detection circuit module at least comprises: the LED illuminating lamp constant current driving circuit and the car illumination detection circuit are connected with the LED illuminating lamp constant current driving circuit;
as shown in fig. 1, the car illumination detection circuit is used for collecting illumination in the car, converting the illumination into an illumination signal which can be identified by the control chip, and judging whether to start the standby LED light source by driving the LED lighting lamp constant current driving circuit according to the collected illumination intensity.
The car illumination detection circuit converts the collected illumination into a corresponding voltage signal according to the illumination intensity and transmits the voltage signal to the control chip; the car illuminance detection circuit at least comprises a photoresistor R25 and a resistor R24 which form a resistor voltage division circuit:
when no light irradiates, the resistance value of the photoresistor is increased;
when light irradiates, the resistance value of the photoresistor becomes small;
according to different light intensities, the AIN6 voltages corresponding to the cage illumination detection circuit are different; the illumination signal is automatically converted into a voltage signal and is transmitted to the control chip for processing, and the control chip compares the collected illumination signal with a preset threshold value to finally determine whether the car lighting source works normally;
when the control chip sends out an instruction to turn off all the illuminations of the elevator, the elevator car illumination detection circuit does not detect the light intensity any more, and the standby light source is prevented from being turned on; when the elevator is running again, the light intensity is detected again.
The car lighting source fault detection circuit module further comprises an alarm and indication circuit, and as shown in fig. 3, when the control chip starts the standby LED light source, the alarm and indication circuit gives an alarm to remind maintenance personnel to replace the fault light source in time. Preferably, D47 light detection pilot lamp lights among the warning and indicating circuit, reminds maintenance personal to change trouble light source in time.
As shown in fig. 2, the LED lighting lamp constant current driving circuit includes a plurality of groups of LED lighting lamp constant current driving units connected in parallel, and each LED lighting lamp constant current driving unit includes:
an LED constant current driving chip;
the control chip is connected with the LED constant current driving chip through a current limiting resistor R18 to control the LED illuminating lamp to be turned on and off; the power supply input end of the LED constant current driving chip is connected with a power supply through a filter capacitor; r10 is LED light current-limiting resistance, and the resistance is less, and LED light electric current is bigger, and luminance is higher.
PT4115 is LED constant current drive chip, and current limiting resistor R18 is connected to 3 feet to the singlechip, and the singlechip can control opening, closing of LED light, and 5 feet are chip power input pins, and C9 is power filter capacitor, guarantees that U5 power supply is stable. R10 is LED light current-limiting resistance, and the resistance is less, and LED light electric current is bigger, and luminance is higher. Preferably, the invention is provided with 6 groups of LED illuminating lamp constant current driving units, the power of each group of light sources is 3W, and the power of the standby light source is 18W. When the control chip detects that the illuminance is lower than a set value (the requirement of GB 7588 and 2003 is 50lx), and the elevator runs normally, the single chip microcomputer sends out an instruction to control all the LED standby light sources of all the groups to work completely.
As shown in fig. 5, the mains power failure detection circuit includes:
VCCIN is connected with power adapter interface VCCIN, AIN3 is connected with analog channel 3 of control chip;
when the mains supply is powered off, the AIN3 is communicated with GND through a resistor R30, and the voltage of the AIN3 is 0V;
when the mains supply is normal, the resistors R27 and R30 form a resistor voltage division circuit, and the voltage of AIN3 is DC4.5V;
the control chip judges whether the commercial power exists or not by detecting the voltage of AIN 3;
when the control chip detects power failure, the control chip sends out an instruction: controlling an LED illuminating lamp constant-current driving unit to work as emergency illumination, and simultaneously lighting a state indicator lamp D45 mains supply power failure indicator lamp, a D47 light detection indicator lamp and a D50 discharge indicator lamp;
when the commercial power is normal, the car illumination detection circuit detects that the car is illuminated normally, and the control chip detects that the voltage of the AIN3 is 0V, at the moment, the state indicator lamp D45 commercial power failure indicator lamp is turned on, and then the battery charging circuit is judged to be in fault. And prompting a maintenance worker that the battery charging device needs to be replaced. The charging circuit is shown in fig. 4, the P1 is a power adapter interface, the power adapter mainly converts AC220V into DC12.6V, the battery and the power adapter are isolated by two isolation diodes D10 and D20, and the power adapter is used for charging DC12.6V lithium batteries (DC12.6V lithium batteries are adopted as emergency power batteries, so that maintenance and replacement are convenient), and due to the fact that overcharge protection is arranged inside the power adapter and the lithium batteries, the power adapter and the lithium batteries are automatically stopped after the batteries are fully charged, and the batteries are protected from being overcharged.
The mains supply power failure detection circuit is used for: when the commercial power has a power failure, the generated voltage signal is transmitted to the control chip for processing through the commercial power failure detection circuit: controlling the commercial power failure indicator lamp, the light ray detection indicator lamp and the discharge indicator lamp to be turned on; and controlling the standby power supply to discharge, and controlling the LED illuminating lamp to be lightened as emergency illumination through the LED illuminating lamp constant current driving circuit. When power is off, the D45 mains supply power failure indicator lamp, the D47 light detection indicator lamp and the D50 discharge indicator lamp in the figure 3 are turned on, and the lithium battery starts to discharge to drive a group of LED illuminating lamps in the figure 2 to be turned on as emergency illumination.
As shown in fig. 6, the battery voltage detection circuit includes: VCC is connected with a battery end VCC, a resistor R23 and a resistor R26 form a resistor voltage dividing circuit, an analog signal is transmitted to a control chip AIN5 channel, and analog-to-digital conversion is carried out to determine the voltage of two ends of the battery;
when the battery capacity of the emergency power supply is less than 80% of the maximum storage capacity of the battery, the battery is charged, and a D49 charging indicator lamp is lightened to 100% of the storage capacity;
when the voltage at VCCIN is DC12.6V, but the voltage at VCC cannot rise all the time, it is determined that the battery is faulty.
Maintenance personnel need to replace the batteries.
The battery voltage and battery charging detection circuit is used for: when the battery and the battery charging circuit are in fault, the generated voltage signal is transmitted to the control chip through the battery and the battery charging circuit for processing: and the battery fault indication actuating mechanism is controlled to act, and a maintenance worker is reminded of replacing the fault battery or the charging device in time. When the battery or the battery has a charging fault, a D48 battery fault indicator lamp or a D45 mains supply power failure indicator lamp in the figure 3 is turned on, and sound alarm is given to remind maintenance personnel of replacing the faulty battery or the charging device in time.
Examples 2,
The elevator emergency lighting system of embodiment 1 further comprising an energy saving circuit module, the energy saving circuit module comprising: the elevator operation signal detection circuit, the delay adjusting circuit and the relay control circuit;
if the elevator operation signal detection circuit does not detect an elevator operation signal, the control chip sends an instruction after the delay time set in the delay adjusting circuit, the relay normally-closed point in the relay control circuit is driven to be disconnected, and the car illumination is turned off. When the elevator car stops at a landing and the power-driven automatic door is closed, if no operation instruction exists in the elevator car and a certain time delay is passed, the illumination of the elevator car is turned off so as to achieve the purpose of energy conservation.
As shown in fig. 7, in the elevator operation signal detection circuit, P2 is an elevator operation signal input interface, and an optical coupler is isolated by U8, so as to transmit the detected elevator operation signal to a single chip microcomputer PB4 channel corresponding to a control chip, and the single chip microcomputer drives a relay in the relay control circuit to act or not according to the signal;
as shown in fig. 8, in the delay adjusting circuit, the analog voltage of the AIN4 channel of the single chip microcomputer corresponding to the control chip is adjusted by controlling the potentiometer RP1, and the single chip microcomputer drives the delay off time of the normally off point of the relay in the relay control circuit according to the signal. Preferably, still include electric capacity C13 and be used for the filtering anti-shake at time delay regulating circuit, utilize the charge-discharge principle of electric capacity, make the voltage signal of output more balanced when rotatory potentiometre, the singlechip of being convenient for gathers the signal. The potentiometer is rotated to different positions, the analog voltage transmitted to the single chip microcomputer AIN4 channel corresponding to the control chip is different, the higher the voltage is, the longer the delay time is, and otherwise, the shorter the delay time is.
As shown in fig. 9, in the relay control circuit, when the control chip detects that the elevator has no running signal, the PB5 gives a low level, the isolation optocoupler U10 is turned on, the control triode Q2 is turned on, the relay action normally-off point is turned off, and the car illumination is turned off. If the elevator does not have the operation signal and after the set delay time, the control chip sends out an instruction to turn off all the illuminations of the elevator. At this moment, car illuminance detection circuitry no longer detects light intensity, prevents to open standby light source, only when the elevator moves once more, just detects light intensity, realizes energy-conserving purpose.
Examples 3,
The working method of the elevator emergency lighting system according to the embodiment 1 comprises the following steps:
when the lighting source in the car fails and the illumination of the light source is less than or equal to 50lx, the standby light source (the non-emergency lighting source, the power supply and the main light source) is started, and simultaneously, the sound alarm is given out to prompt personnel to replace the main light source.
The working method further comprises a mains supply power failure detection method:
automatically starting an emergency lighting loop, and lighting an emergency lamp;
when detecting that the commercial power is normal, car illuminance detection circuit detects that the car illumination is normal, but when control chip detected AIN3 voltage and is 0V, state pilot lamp D45 commercial power down pilot lamp was lighted this moment, then judges battery charging circuit trouble.
The working method further comprises a battery voltage detection method:
when the electric quantity of the battery of the emergency power supply is less than or equal to 80% of the maximum stored electric quantity of the battery, the battery is charged to 100% of the stored electric quantity, and when the electric quantity of the battery reaches 100%, the charging circuit is automatically cut off;
when the battery capacity of the emergency power supply is always maintained to be less than or equal to 50% of the maximum storage capacity of the battery, the battery is determined to be invalid, and when the equipment enters a maintenance state, a maintenance worker is prompted to replace the battery.
Examples 4,
The working method according to embodiment 2 further includes an energy saving method:
when the elevator running signal is not detected for a fixed time, the light source in the elevator car is extinguished. The elevator enters an energy-saving mode, the illumination in the elevator car is less than or equal to 50lx at the moment, and the standby light source is not started.
Claims (10)
1. An elevator emergency lighting system, comprising: the system comprises a control chip, a car lighting source fault detection circuit module, a mains supply power failure detection circuit and a battery voltage and battery charging detection circuit;
the car lighting source fault detection circuit module at least comprises: the LED illuminating lamp constant current driving circuit and the car illumination detection circuit are connected with the LED illuminating lamp constant current driving circuit;
the car illumination detection circuit is used for acquiring illumination in the car, converting the illumination into an illumination signal which can be identified by the control chip, and judging whether to start the standby LED light source by driving the LED illuminating lamp constant-current driving circuit according to the acquired illumination intensity.
2. The elevator emergency lighting system according to claim 1, wherein the car illumination detection circuit converts the collected illumination into a corresponding voltage signal according to the illumination intensity and transmits the voltage signal to the control chip; the car illuminance detection circuit at least comprises a photoresistor R25 and a resistor R24 which form a resistor voltage division circuit:
when no light irradiates, the resistance value of the photoresistor is increased;
when light irradiates, the resistance value of the photoresistor becomes small;
according to different light intensities, the AIN6 voltages corresponding to the cage illumination detection circuit are different;
when the control chip sends out an instruction to turn off all the illuminations of the elevator, the elevator car illumination detection circuit does not detect the light intensity any more, and the standby light source is prevented from being turned on; when the elevator is running again, the light intensity is detected again.
3. The elevator emergency lighting system according to claim 2, wherein the car lighting light source fault detection circuit module further comprises an alarm and indication circuit, and when the control chip starts the standby LED light source, the alarm and indication circuit gives an alarm to remind a maintenance person to replace the fault light source in time;
preferably, the LED lighting lamp constant current driving circuit includes a plurality of groups of LED lighting lamp constant current driving units connected in parallel, and each LED lighting lamp constant current driving unit includes:
an LED constant current driving chip;
the control chip is connected with the LED constant current driving chip through a current limiting resistor R18 to control the LED illuminating lamp to be turned on and off; the power supply input end of the LED constant current driving chip is connected with a power supply through a filter capacitor; r10 is LED light current limiting resistance.
4. The elevator emergency lighting system of claim 1, wherein the mains power failure detection circuit comprises:
VCCIN is connected with power adapter interface VCCIN, AIN3 is connected with analog channel 3 of control chip;
when the mains supply is powered off, the AIN3 is communicated with GND through a resistor R30, and the voltage of the AIN3 is 0V;
when the mains supply is normal, the resistors R27 and R30 form a resistor voltage division circuit, and the voltage of AIN3 is DC4.5V;
the control chip judges whether the commercial power exists or not by detecting the voltage of AIN 3;
when the control chip detects power failure, the control chip sends out an instruction: controlling an LED illuminating lamp constant-current driving unit to work as emergency illumination, and simultaneously lighting a state indicator lamp D45 mains supply power failure indicator lamp, a D47 light detection indicator lamp and a D50 discharge indicator lamp;
when the commercial power is normal, the car illumination detection circuit detects that the car is illuminated normally, and the control chip detects that the voltage of the AIN3 is 0V, at the moment, the state indicator lamp D45 commercial power failure indicator lamp is turned on, and then the battery charging circuit is judged to be in fault.
5. The elevator emergency lighting system of claim 1, wherein the battery voltage detection circuit comprises: VCC is connected with a battery end VCC, a resistor R23 and a resistor R26 form a resistor voltage dividing circuit, an analog signal is transmitted to a control chip AIN5 channel, and analog-to-digital conversion is carried out to determine the voltage of two ends of the battery;
when the battery capacity of the emergency power supply is less than 80% of the maximum storage capacity of the battery, the battery is charged, and a D49 charging indicator lamp is lightened to 100% of the storage capacity;
when the voltage at VCCIN is DC12.6V, but the voltage at VCC cannot rise all the time, it is determined that the battery is faulty.
6. The elevator emergency lighting system of claim 1, further comprising an energy saving circuit module, the energy saving circuit module comprising: the elevator operation signal detection circuit, the delay adjusting circuit and the relay control circuit;
if the elevator operation signal detection circuit does not detect an elevator operation signal, the control chip sends an instruction after the delay time set in the delay adjusting circuit, the relay normally-closed point in the relay control circuit is driven to be disconnected, and the car illumination is turned off.
7. The elevator emergency lighting system according to claim 6, wherein in the elevator operation signal detection circuit, the P2 is an elevator operation signal input interface, the optocoupler is isolated through the U8, the detected elevator operation signal is transmitted to a PB4 channel of the single chip microcomputer corresponding to the control chip, and the single chip microcomputer drives the relay in the relay control circuit to operate or not according to the signal;
in the delay adjusting circuit, analog voltage of a channel of a singlechip AIN4 corresponding to a control chip is adjusted by a control potentiometer RP1, and the singlechip drives the relay in the relay control circuit to delay off time of a normally closed point according to the signal;
among the relay control circuit, when control chip detected the elevator and did not have the running signal, PB5 gave the low level, and isolation opto-coupler U10 switches on, and control triode Q2 switches on, and relay action normally closes the point disconnection, closes the car illumination.
8. A working method of an elevator emergency lighting system is characterized by comprising a detection method of brightness in a car:
when the lighting source in the car breaks down and the illumination of the light source is less than or equal to 50lx, the standby light source is started, and simultaneously, an audible alarm is given out to prompt personnel to replace the main light source.
9. The method of claim 8, further comprising a mains power failure detection method:
when the mains supply power failure is detected, an emergency lighting loop is automatically started, and an emergency lamp is lightened;
when detecting that the commercial power is normal, car illuminance detection circuit detects that the car illumination is normal, but when control chip detected AIN3 voltage and is 0V, state pilot lamp D45 commercial power down pilot lamp was lighted this moment, then judges battery charging circuit trouble.
10. The operating method of an elevator emergency lighting system according to claim 8, further comprising a battery voltage detection method:
when the electric quantity of the battery of the emergency power supply is less than or equal to 80% of the maximum stored electric quantity of the battery, the battery is charged to 100% of the stored electric quantity, and when the electric quantity of the battery reaches 100%, the charging circuit is automatically cut off;
when the battery capacity of the emergency power supply is always maintained to be less than or equal to 50% of the maximum storage capacity of the battery, a maintainer is prompted to replace the battery;
the working method also comprises an energy-saving method:
when the elevator running signal is not detected for a fixed time, the light source in the elevator car is extinguished.
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| CN202010139293.7A CN111343763A (en) | 2020-03-03 | 2020-03-03 | Elevator emergency lighting system and working method thereof |
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| CN202010139293.7A CN111343763A (en) | 2020-03-03 | 2020-03-03 | Elevator emergency lighting system and working method thereof |
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Cited By (1)
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