CN101742798B - Ballast and fluorescent lamp control system - Google Patents
Ballast and fluorescent lamp control system Download PDFInfo
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- CN101742798B CN101742798B CN200910189289.5A CN200910189289A CN101742798B CN 101742798 B CN101742798 B CN 101742798B CN 200910189289 A CN200910189289 A CN 200910189289A CN 101742798 B CN101742798 B CN 101742798B
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Abstract
The invention is applied in the field of fluorescent lamps, and provides a ballast, a control method and a fluorescent lamp control system. The ballast comprises a power supply input part, a drive unit and a control part; the control part comprises a working mode selection unit, a control unit, a frequency modulation unit, a CAN communication unit and an abnormal detection unit; and the control unit sends a power supply adjustment signal to the power supply input part according to a fed-back detection result, and feeds back alarm information to external main control equipment through the CAN communication unit. The ballast provided by the invention is characterized in that the control unit acquires and judges a direct-current power supply and an alternating-current power supply, and a CAN bus feeds back the abnormal condition of a fluorescent lamp to the external control equipment to monitor in real time; when the electric quantity is over low or the fluorescent lamp is abnormal, the CAN communication unit feeds back the state of the ballast to the main control equipment so as to monitor the current working state of the ballast in real time; and the CAN bus remotely controls the ballast.
Description
Technical field
The invention belongs to fluorescent lamp control technology field, relate in particular to a kind of ballast and fluorescent lamp control system.
background technology
Fig. 1 shows the modular structure of the ballast that prior art provides, ballast 1 comprises the drive circuit 12 that self-excited oscillation type drives chip 11 and drives chip 11 to be connected with self-excited oscillation type, wherein self-excited oscillation type drives the fixing PWM ripple of chip 11 outputs to drive circuit 12, and drive circuit 12 is reverse into the required high-frequency ac voltage of fluorescent lamp 2 by direct voltage and exports and drive fluorescent lamp 2 to realize lamp tube starting.
After civil power breaks down, ballast 1 to the required direct voltage of drive circuit 12, then drives fluorescent lamp 2 to light by drive circuit 12 boost in voltage of reserve battery.
There is following shortcoming in the ballast 1 of prior art: current state that can not determine ballast 1 work is at emergency rating, mains-supplied state, abnormal state occurs or light single tube and two-tube switching state, thereby causes the operating state of uncontrollable ballast 1; Each ballast 1 works alone in addition, cannot carry out Long-distance Control, and can not carry out cascade control to a plurality of ballasts.
summary of the invention
The object of the embodiment of the present invention is to provide a kind of ballast, is intended to solve the problem of work at present state that can not determine ballast in prior art.
The embodiment of the present invention is achieved in that a kind of ballast, and it comprises power supply importation, be connected with described power supply importation for driving the driver element of fluorescent lamp operation, and for controlling the control section of driver element work; The control section of described ballast comprises:
Mode of operation selected cell is contingency mode or light illumination mode for setting the mode of operation of ballast;
Control unit, for according to the mode of operation of selecting, starts described power supply importation and frequency modulation unit;
Frequency modulation unit, for receiving the control signal of described control unit, and to described driver element output pwm pulse control signal;
CAN communication unit, its one end is connected to the control end of described control unit, and the other end of described CAN communication unit is connected to outside master control equipment, for realizing communication with external piloting control equipment;
Abnormality detection unit, for gathering the working condition of power supply importation, and feeds back to described control unit by testing result;
Described control unit, according to the testing result of feedback, sends power supply and adjusts signal to described power supply importation, and passes through CAN communication unit to outside main control device feedback alarm information.
Described ballast, wherein, the power supply importation of described ballast comprises: the power input part by mains-supplied divides and divided by the battery powered power input part of emergency service; Described light illumination mode adopts mains-supplied, and described contingency mode adopts emergency service powered battery.
Described ballast, wherein, described abnormality detection unit comprises: battery abnormality detection unit, for detection of the output of emergency service battery, and feeds back to described control unit by testing result; And civil power abnormality detection unit, for detection of civil power input, whether exist, and testing result is fed back to described control unit.
Described ballast, wherein, described control unit and described frequency modulation unit integrated with a slice MCU chip.
Based on above-mentioned ballast structure, the present invention also provides a kind of ballast control method, and it comprises the following steps:
A, judge the mode of operation of described ballast,
If ballast is operated in light illumination mode, adopt the power input part by mains-supplied to divide, and to drive part output pwm pulse control signal;
If ballast is operated in contingency mode, adopts by the battery powered power input part of emergency service and divide, when Bing city electro-detection does not exist, to drive part output pwm pulse control signal;
The working condition of B, collection power supply importation, sending power supply and adjusting signal to described power supply importation according to this working condition, and pass through CAN bus to outside main control device feedback alarm information.
In addition, the present invention, also based on foregoing, provides a kind of fluorescent lamp control system, and it comprises master control equipment, at least two ballasts that are connected with described master control equipment and the fluorescent lamp being connected with described ballast; Described ballast is above-mentioned ballast; Described ballast is connected with described master control equipment by CAN bus.
Invention effect:
1, ballast of the present invention can be set two kinds of mode of operations, and light illumination mode is applicable to the light fixture in normal illumination place, and emergency pattern is applicable to fire emergency lamp use, and a device is dual-purpose, convenient and practical, thereby does not exist coupling difficult, and device is selected difficult problem;
2, the total line traffic control of the control unit of ballast control section of the present invention and frequency modulation unit and CAN can be integrated and a slice MCU chip, by Programming, realize function separately, avoided the interference between complicated simulation circuit devcie, improved the Digital Control of ballast, and in a plurality of ballast cascades, and a slice MCU can output multi-channel PWM control wave, so can also realize, the driving of a plurality of fluorescent lamp light fixtures is controlled;
3, ballast provided by the invention collection to DC power supply and communication power supply by control unit, and judge, can by CAN bus, to external control devices, feed back in real time the abnormal conditions of fluorescent lamp, realize monitoring in real time, when electric weight is too low or fluorescent lamp occurs when abnormal, by CAN communication unit by the state feedback of ballast to master control equipment, realized the work at present state of ballast monitored in real time, and by CAN bus, ballast has been carried out to Long-distance Control.
Accompanying drawing explanation
Fig. 1 is the modular structure schematic diagram of the ballast that provides of prior art;
Fig. 2 is the modular structure schematic diagram of the ballast that provides of the embodiment of the present invention;
Fig. 3 is the circuit diagram of control unit in the ballast that provides of the embodiment of the present invention;
Fig. 4 is the circuit diagram of civil power abnormality detection unit in the ballast that provides of the embodiment of the present invention;
Fig. 5 is the circuit diagram of battery low pressure detecting unit in the ballast that provides of the embodiment of the present invention;
Fig. 6 is the circuit diagram of CAN communication unit in the ballast that provides of the embodiment of the present invention;
The circuit diagram of detecting unit interface module is provided in the ballast that provides of the embodiment of the present invention Fig. 7;
Fig. 8 is the modular structure schematic diagram of the fluorescent lamp control system that provides of the embodiment of the present invention;
Fig. 9 is the flow chart of the ballast control method that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 2 shows the modular structure of the ballast that the embodiment of the present invention provides; For convenience of explanation, only show the part relevant to the embodiment of the present invention, details are as follows.
Ballast 3 provided by the present invention comprises: power supply importation, be connected with described power supply importation for driving the driver element of fluorescent lamp operation, and for controlling the control section of driver element work.The power supply importation here comprises following two parts:
1, the power input part by mains-supplied divides.This part is main by regulator rectifier circuit, civil power is treated to by rectification, filtering, voltage stabilizing etc. successively, for driver element provides bussed supply voltage;
2, by the battery powered power input part of emergency service, divided.Mainly that the voltage that emergency service battery is provided passes through after DC voltage booster circuit, for driver element provides bussed supply voltage.
And the present invention improves to some extent on control circuit, so ballast control section of the present invention comprises following a few part:
1, mode of operation selected cell 38, for setting the mode of operation of ballast, are contingency mode or light illumination mode; If ballast is operated in light illumination mode, adopt the power input part by mains-supplied to divide, be driver element power supply, this situation is applicable to normal illumination place; If ballast is operated in contingency mode, adopt by the battery powered power input part of emergency service and divide, when Bing city electro-detection does not exist, for driver element provides operating voltage, this situation is applicable to fire emergency place;
2, control unit 31, for according to the mode of operation of selecting, start described power supply importation and frequency modulation unit;
3, frequency modulation unit 35, for the control signal of reception control unit 31, and to driver element 36 output pwm pulse control signals;
4, CAN communication unit 34, and its one end is connected to the control end of control unit 31, and the other end of CAN communication unit 34 is connected to outside master control equipment, for realizing communication with external piloting control equipment;
5, abnormality detection unit, for gathering the working condition of power supply importation, and feeds back to described control unit by testing result;
Above-mentioned control unit 31, according to the testing result of feedback, sends power supply and adjusts signal to above-mentioned power supply importation, and passes through CAN communication unit 34 to outside main control device feedback alarm information.
Above-mentioned control unit 31 and frequency modulation unit 35 can be integrated realize with a slice MCU, can facilitate the cascade of ballast, and a slice MCU can output multi-channel PWM ripple, can be used for driving a plurality of fluorescent lamp operations.Above-mentioned mode of operation selected cell 38 can adopt the toggle switch being connected with MCU to realize, and CAN communication unit 34 can adopt conventional CAN bus transceiver.
As shown in Figure 2, above-mentioned abnormality detection unit comprises: battery abnormality detection unit, for detection of the output of emergency service battery, and feeds back to control unit 31 by testing result; And civil power abnormality detection unit 32, for detection of civil power input, whether exist, and testing result is fed back to control unit 31.
Mechanism based on above-mentioned ballast improves, and the present invention also provides a kind of control method, and it comprises the following steps:
The mode of operation of step S10, judgement ballast, if ballast is operated in light illumination mode, performs step S11, adopts the power input part by mains-supplied to divide, and to drive part output pwm pulse control signal; If ballast is operated in contingency mode, perform step S12, adopt and divided by the battery powered power input part of emergency service, when Bing city electro-detection does not exist, to drive part output pwm pulse control signal;
The working condition of step S20, collection power supply importation, sending power supply and adjusting signal to described power supply importation according to this working condition, and pass through CAN bus to outside main control device feedback alarm information.
The Fig. 9 of take illustrates the implementation procedure of said method as example, as follows:
When ballast is operated in light illumination mode, described step S20 comprises the following steps:
Whether step S201, the input of detection civil power exist, if exist, return to step S10; If do not exist, perform step S202;
Step S202, control unit send for starting the power supply of emergency service battery output and adjust signal, and to outside main control device feedback, characterize the warning message of civil power power-off by CAN bus;
The output voltage of step S203, detection emergency service battery, judges that whether this output voltage is lower than the threshold voltage of setting; If so, perform step S204, the warning message by CAN bus to outside main control device feedback characterizing battery over-discharge; If not, continue by emergency service powered battery, be back to step S201.
When ballast is operated in contingency mode, described step S20 comprises the following steps:
Whether step S211, the input of detection civil power exist, if exist, return to step S10; If do not exist, perform step S212;
Step S212, to drive part output pwm pulse control signal;
The output voltage of step S213, detection emergency service battery, judges that whether this output voltage is lower than the threshold voltage of setting; If so, by CAN bus, to outside main control device, feed back the warning message of characterizing battery over-discharge; If not, continue by emergency service powered battery, be back to step S211.
No matter what mode of operation ballast is operated in, can monitor in real time the operating current of fluorescent lamp, when it surpasses certain limit; also can cut off fluorescent lamp operation by control unit; and upload warning message by CAN bus, for the protection of lamp source, avoid lamp source to damage.This function can realize by the feedback detecting unit in Fig. 2.
With reference to said method flow process, in order to realize above-mentioned battery detecting, above-mentioned battery abnormality detection unit can be adopted in two ways and realize, and below illustrates:
The first implementation is: by control unit, realized the judgement of voltage threshold, at this moment, battery abnormality detection unit comprises: the battery low pressure detecting unit 33 in Fig. 2, and its input connects the output of emergency service battery, and its output is connected to the DC power supply test side of control unit 31; Battery low pressure detecting unit 33 is by the operating voltage of sample circuit Real-time Obtaining emergency service battery, and this operating voltage is fed back to control unit 31, when battery operated voltage lower than set threshold voltage time, control unit 31 output alarm control signals, and feed back to outside master control equipment by described CAN communication unit.The sample circuit here can adopt resistance sampling circuit as shown in Figure 5 to carry out the operating voltage of Real-time Obtaining emergency service battery, such as resistance R 8, resistance R 7 are obtained the operating voltage of emergency service battery by dividing potential drop, and realize filtering at the two ends of resistance R 7 shunt capacitance C5, the series connection node of resistance R 8 and resistance R 7 is connected to the DC power supply test side DC-test of control unit 31 as the output of battery low pressure detecting unit 33.
The second implementation is: voltage sample and threshold decision unification are realized by analog circuit, such as, adopt electric resistance partial pressure to adopt circuit to obtain the operating voltage of emergency service battery, then pass through comparator, the operating voltage that sampling is obtained and a reference voltage compare, then to above-mentioned control unit 31 output comparative results, control unit 31 output alarm control signals.This mode also can realize real-time monitoring emergency service battery, and battery operated voltage lower than set threshold voltage time, control unit 31 feeds back to outside master control equipment by described CAN communication unit.
As shown in Figure 4, details are as follows for the physical circuit of above-mentioned civil power abnormality detection unit 32:
Civil power abnormality detection unit 32 comprises: photoelectrical coupler U2, diode D1, D2, capacitor C 1, C2, C3 and C4, divider resistance R1, R2, R3 and R4, resistance R 5, resistance R 6, triode Q1 and Q2; Wherein in photoelectrical coupler U2, the negative electrode of diode is connected to an input of AC power (as 220V), in photoelectrical coupler U2, the anode of diode is connected to another input of AC power (as 220V) by divider resistance R1, R2, R3 and the R4 being connected in series successively, and divider resistance R1, R2, R3 and R4 form divider resistance string; Diode D1 and capacitor C 1 are connected in series between two inputs of AC power, and the anode that is connected to diode in photoelectrical coupler U2 is held in being connected in series of diode D1 and capacitor C 1; The emitter of triode Q1 connects a bias voltage VCC, and the emitter of triode Q1 is also connected to the collector electrode of the triode in photoelectrical coupler U2; The base stage of the base stage of triode Q1 and triode Q2 is all connected to the emitter of the triode in photoelectrical coupler U2, and the collector electrode of triode Q1 is connected to the emitter of triode Q2, the grounded collector of triode Q2; Resistance R 5 and capacitor C 2 are connected in parallel between the emitter and ground of the triode in photoelectrical coupler U2; The negative electrode of diode D2 is connected to the link that the collector electrode of triode Q1 and the emitter of triode Q2 are connected, and the anode of diode D2 is connected to the AC power test side AC-test of control unit 31 as the output of civil power abnormality detection unit 32; Resistance R 6 is connected in parallel with diode D2, and the negative electrode of diode D2 is by capacitor C 3 ground connection, and the anode of diode D2 is by capacitor C 4 ground connection.The above-mentioned double-triode valve push-pull circuit being formed by triode Q1 and Q2, the input of double-triode valve push-pull circuit is the base stage of triode Q1 and the Q2 end that is connected, double-triode valve push-pull circuit power end is the emitter of triode Q1, and the output of double-triode valve push-pull circuit is the node end that the collector electrode of triode Q1 and the emitter of triode Q2 are connected.220V AC power is exported square wave, output AC voltage sampled signal after the push-pull circuit being comprised of triode Q1 and Q2 after dividing potential drop, filtering are isolated by photoelectrical coupler U2.Certainly, civil power abnormality detection of the present invention unit 32 is also not limited to only adopt circuit in this to realize.
As shown in Fig. 3 to Fig. 7, below provided an optimum embodiment of the present invention.In embodiments of the present invention, control unit 31 and frequency modulation unit 35 integrate and have formed micro-control unit (Micro Contro1 Unit, MCU), it is the control chip of STM32F103C6 that this MCU can adopt model, and mode of operation selected cell adopts toggle switch K to realize.Fig. 3 shows the circuit diagram of control unit 31 and mode of operation selected cell, for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows:
Control unit 31 comprises chip U1 and peripheral circuit thereof, wherein the VBAT pin of U1 connects 3.3V voltage by resistance R 12, the PC13-TAMPER-RTC pin of U1, PC14-OSC32IN pin and PC15-OSC32_OUT pin are all unsettled not to be connect, the PD0OSC_IN pin of U1 is connected to the PD1OSC_OUT pin of U1 by resistance R 13, the PD0OSC_IN pin of U1 is also connected to the PD1OSC_OUT pin of U1 by crystal oscillator Y1, the PD0OSC_IN pin of U1 is also by capacitor C 9 ground connection, the PD1OSC_OUT pin of U1 is also by capacitor C 10 ground connection, resistance R 14 and capacitor C 11 are connected in series between voltage 3.3V and ground, the NRST pin that end S0 is connected to U1 that is connected in series of resistance R 14 and capacitor C 11, resistance R 14 is connected in series end S0 also by K switch 1 ground connection with capacitor C 11, the VSSA pin of U1 is by resistance R 15 ground connection, the VDDA pin of U1 is connected to 3.3V voltage by resistance R 16, capacitor C 17 is connected between the VSSA pin of U1 and the VDDA pin of U1, the PA0-WKUP pin of U1, PA1 pin, PA2 pin, PA6 pin is all unsettled not to be connect, the PA3 pin of U1 is connected with J3 interface respectively with PA4 pin, the PA5 pin of U1 is drawn DC-test end, as receiving DC power supply test side, the PA7 pin of U1 is drawn T2-PB0 end, and the PA7 pin of U1 is also by capacitor C 15 ground connection, and diode D5 and capacitor C 15 are connected in parallel, and the negative electrode of diode D5 is connected to the PA7 pin of U1, the plus earth of diode D5, the PB0 pin of U1 is drawn T1-PB1 end, and the PB0 pin of U1 is also by capacitor C 16 ground connection, and diode D6 and capacitor C 16 are connected in parallel, and the negative electrode of diode D6 is connected to the PB0 pin of U1, the plus earth of diode D6, the PB2 pin ground connection of U1, the PB1 pin of U1 is by the resistance R 17 and capacitor C 12 ground connection that are connected in series successively, and the 1st pin that is connected to toggle switch K2 is held in being connected in series of resistance R 17 and capacitor C 12, the PB10 pin of U1 is by the resistance R 18 and capacitor C 13 ground connection that are connected in series successively, and the 2nd pin that is connected to toggle switch K2 is held in being connected in series of resistance R 18 and capacitor C 13, the PB11 pin of U1 is by the resistance R 19 and capacitor C 14 ground connection that are connected in series successively, the 3rd pin that is connected to toggle switch K2 is held in being connected in series of resistance R 19 and capacitor C 14, the 4th pin of toggle switch K2 and the 5th pin is all unsettled does not connect, the 6th pin of toggle switch K2, the 7th pin and the equal ground connection of the 8th pin, the VSS_1 pin of U1, VSS_2 pin, the equal ground connection of VSS_3 pin, the VDD_1 pin of U1, VDD_2 pin, VDD_3 pin are all connected to 3.3V voltage, the PB12 pin of U1, PB15 pin, PA10 pin, PA13 pin, PA15 pin, PA14 pin, PB3 pin, PB4 pin and PB5 pin are all unsettled not to be connect, the PB13 pin of U1 is drawn PWM-PB14-T1 end, the PB14 pin of U1 is drawn PWM-PB14-T2 end, the PA8 pin of U1 is drawn PWM-PA8-T1 end, the PA9 pin of U1 is drawn PWM-PA9-T2 end, the PA11 pin of U1 is drawn CON-chdc end, for controlling the unlatching of DC power supply part, such as the control end of DC voltage booster circuit in this end connection layout 2, the PA12 pin of U1 is drawn AC-test end, and as AC power test side, the PA12 pin of U1 is also connected to 3.3V voltage by resistance R 20, the PB8 pin of U1 is drawn CAN-PB8 end, and the PB9 pin of U1 is drawn CAN-PB9 end.
CAN communication unit 34 shown in the CAN-PB8 end that the PB8 of said chip U1 and PB9 pin are drawn and CAN-PB9 end connection layout 6.As shown in Figure 6, in embodiments of the present invention, CAN communication unit 34 can adopt CAN communication chip, such as the model high-speed CAN transceiver that is PCA82C250, its physical circuit as shown in Figure 6, for convenience of explanation, only show the part relevant to the embodiment of the present invention, details are as follows.
CAN communication unit 34 comprises chip U4 and resistance R 21, R22, R23, the VCC pin of its chips U4 connects 3.3V voltage, the GND pin ground connection of chip U4, the RS pin ground connection of chip U4, the VREF pin of chip U4 is unsettled not to be connect, the CANH pin of chip U4 connects one end of J4 interface, the CANL pin of chip U4 connects the other end of J4 interface (being bus interface), resistance R 21 is connected between the CANH pin of chip U4 and the CANL pin of chip U4, the CAN-PB9 that the D pin of chip U4 is connected to U1 by resistance R 22 holds, the CAN-PB8 that the R pin of chip U4 is connected to U9 by resistance R 23 holds.Due to the inside of chip U1 integrated CAN controller; Therefore the effect of chip U4 is in order to convert the signal of the inner integrated CAN controller output of chip U1 to differential signal, also the LVTTL level conversion of CAN controller output is become to the CAN signal level of standard simultaneously, thereby be convenient to communicate by letter with outside master control equipment.
The PWM-PB14-T1 end that the PB13 pin of said chip U1 is drawn, the PWM-PB14-T2 end that PB14 pin is drawn, the PWM-PA8-T1 end that PA8 pin is drawn, the PWM-PA9-T2 end that PA9 pin is drawn is exported respectively two-way pwm pulse control signal, in order to drive driver element 36.Driver element 36 adopts conventional type of drive, at this, does not elaborate.In embodiments of the present invention, control unit 31 can be exported at least one pair of with the mutual asymmetric high-frequency PWM signal in dead band, pwm signal turn-offs by the high frequency metal-oxide-semiconductor conducting of a pair of mutual symmetry of the rear control driver element 36 of frequency modulation unit 35, driver element 36 is reverse into high-frequency ac voltage by 400V direct voltage, this voltage makes the lamp tube ends of fluorescent lamp 2 produce high-frequency oscillation voltage by fulgurite, and tube starting is lighted.
The T1-PB1 of said chip U1, T2-PB0 port is that feedback detecting unit 37 also belongs to a part for abnormality detection unit for receiving the input of feedback detecting unit 37.This feedback detecting unit 37 is to be detected, fluorescent tube one end gathers lamp current, convert lamp current to voltage, then carry out rectification and voltage division, by port T1-PB1, T2-PB0 is connected to the input port of control unit 31 inner ADC, and ADC controller converts the analog signal of collection to digital signal, sends the kernel processes of control unit 31 to.When fluorescent lamp 2 occurs when abnormal, lamp current can increase suddenly, and after this signal being detected, first control unit 31 starts abnormal protection controls, and then by CAN communication unit 34, sends circuit abnormality signal, until outside master control equipment is accepted.This shows, the present embodiment is on the basis of said structure, and also the control section at ballast has increased by a feedback detecting unit 37.In embodiments of the present invention, feedback detecting unit 37 interface module physical circuit as 7 and Fig. 3 as shown in; Wherein, feedback detecting unit 37 comprises interface module JP1 and capacitor C 15, capacitor C 16, diode D5 and diode D6; The 1st pin ground connection of interface module JP1 wherein, the 2nd pin of JP1 is connected to the PWM-PB13-T1 end of U1 chip, the 3rd pin of JP1 is connected to the PWM-PA8-T1 end of U1 chip, the 4th pin of JP1 is connected to the T1-PB1 end of U1 chip, T1-PB1 end is by capacitor C 16 ground connection, diode D6 and capacitor C 16 are connected in parallel, and the negative electrode of diode D6 is connected to T1-PB1 end, the plus earth of diode D6; The 5th pin ground connection of JP1, the 6th pin of JP1 is connected to the T2-PB0 end of U1 chip, and T2-PB0 end is by capacitor C 15 ground connection, and diode D5 and capacitor C 15 are connected in parallel, and the negative electrode of diode D5 is connected to T2-PB0 end, the plus earth of diode D5; The 7th pin of JP1 is connected to the PWM-PA9-T2 end of U1 chip, and the 8th pin of JP1 is connected to the PWM-PB14-T2 end of U1 chip.From then on circuit can be found out, this enforcement can realize two-way and drive, and realizes the detection to two-way output.
In embodiments of the present invention, under control unit, the operating voltage of control chip can realize by voltage stabilizing circuit, as shown in Figure 2, when mains-supplied power input part divides work, can from the output of regulator rectifier circuit, obtain direct voltage by the second voltage stabilizing circuit, carry out after voltage stabilizing is changed providing required operating voltage into control chip, or when emergency service is battery operated, can from the output of emergency service battery, obtain direct voltage by the first voltage stabilizing circuit, carry out after voltage stabilizing is changed providing required operating voltage into control chip.First voltage stabilizing circuit here and the second voltage stabilizing circuit all can adopt the circuit shown in Fig. 5 to realize.Voltage stabilizing circuit comprises: triode Q3, Q4, resistance R 9, R10, R11, capacitor C 6, C7, C8, diode D4 and three terminal regulator U3, wherein the anode of diode D3 is connected to one end of interface J9 by resistance _ R9, the other end of interface J9 is connected to the CON-chdc end of chip U1, to be described control unit cross CON-chdc end according to the detection information exchange of DC power supply input sends control signal, be used for turn-offing the input of DC power supply (such as battery), the negative electrode of diode D3 is connected to the collector electrode of triode Q3, the negative electrode of diode D3 is also by capacitor C 6 ground connection, the negative electrode of diode D3 is also successively by resistance R 10 and diode D4 ground connection, the negative electrode of diode D3 is also connected to the emitter of triode Q4, the base stage of triode Q4 is connected to the end that is connected in series of resistance R 10 and diode D4, the collector electrode of triode Q4 is connected to the base stage of triode Q3 by resistance R 11, the emitter of triode Q3 is connected to the input IN of three terminal regulator U3, the emitter of triode Q3 is also by capacitor C 7 ground connection, the ground end GND ground connection of three terminal regulator U3, the output OUT output 3.3V voltage of three terminal regulator U3, capacitor C 8 is connected between the output and ground of three terminal regulator U3, the 3.3V voltage of three terminal regulator U3 output is for providing stable 3.3V voltage to U1 chip.When the cell voltage detecting is during lower than 7.5V, battery low pressure detecting unit 33 is the power supply of cutting off to control unit 31, thereby protected the consumption of crossing of battery; The control end output alarm control signal of control unit 31 also feeds back to outside master control equipment by CAN communication unit 34.Adopt different three terminal regulators can obtain different output voltage parameters, or can adopt three-port variable voltage regulator, or in three-terminal voltage-stabilizing chip side, add variable resistor, realize the adjusting to three terminal regulator output voltage, to adapt to the demand of different control chips.
From upper, in embodiments of the present invention, ballast 3 regularly feeds back work at present state, and it is luminous that the lighting of fluorescent lamp 2 controlled by continuous output pwm signal, and every a pair of mutual asymmetric two-way PWM controls a fluorescent lamp 2.By the detection of the PWM controller to MCU, check that the output of PWMYou Ji road just can detect several tubes in work, by selecting mode of operation can make ballast of the present invention be operated under different operating states, and realize the control flow as shown in 9 according to the mode of operation of selecting, in time to external control devices feedback monitor message.Monitor message can be compiled into a state data packets, by CAN communication unit 34, regularly feeds back to master control equipment; So just can monitor in real time the operating state of ballast 3.
Compared with prior art, the embodiment of the present invention has adopted control unit 31 to replace self-excited oscillation type to drive chip, makes to the control of ballast 3 more flexibly, reliably; Simultaneously control unit 31 is also integrated electric weight detection controller and CAN communication controller, has improved integrated level, and module is simplified more, has reduced cost simultaneously; Solved problem that can not determine ballast operating state in prior art.
Based on the above-mentioned improvement to single ballast, in embodiments of the present invention, also a plurality of ballasts 3 are carried out being connected to master control equipment 100 after cascade again, by master control equipment 100, can to the state of a plurality of ballasts 3, carry out Long-distance Control simultaneously.Fig. 8 shows the modular structure schematic diagram of fluorescent lamp control system, for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
Fluorescent lamp control system comprises: master control equipment 100, a plurality of ballast being connected in parallel 3 and fluorescent lamp 2; The state of the ballast 3 by 100 pairs of a plurality of cascades of master control equipment is monitored in real time, and master control equipment 100 sends control command, by CAN communication controller, sends to a plurality of ballasts of carry on CAN communication bus; Each ballast has unique ID address, by the coupling to address, can realize the control to the control of single ballast or one group of ballast, can carry out Long-distance Control by the ballast 3 to a plurality of cascades by 100 pairs of master control equipments like this, realize intelligent management, and can control a plurality of ballasts by a master control equipment simultaneously.
As one embodiment of the present of invention, master control equipment 100 can be connected with ballast 3 by CAN bus, adopts CAN bus protocol to carry out communication, can carry out real-time communication and Long-distance Control.
In embodiments of the present invention, control unit 31 is sampled by 32Dui ac commercial power voltage, civil power abnormality detection unit, and the operating voltage that gathers emergency service battery by battery low pressure detecting unit 33.When cell voltage is during lower than a certain threshold value, cut off the power supply to control unit 31, control unit 31 sends alarm signal and feeds back to master control equipment 100 by CAN communication unit 34; Or control unit 31 detects whether there is power frequency civil power, if had, just close DC voltage booster circuit control, now control unit 31 is to pass through mains-supplied; If control unit 31 detects, there is no mains-supplied, start DC voltage booster circuit and control, now control unit 31 passes through powered battery; Then, control unit 31 to driver element 36, makes fluorescent lamp 2 luminous by driver element 36 by two pairs of pwm signals of frequency modulation unit 35 outputs, realizes normally lighting of fluorescent lamp 2 fluorescent tubes.Control unit 31 detects again the abnormal conditions of fluorescent lamp 2 by feedback detecting unit 37 simultaneously, if it is abnormal that fluorescent lamp 2 occurs, control unit 31 is just controlled frequency modulation unit 35 and is closed pwm signal, control unit 31 sends signal to CAN communication unit 34 simultaneously, CAN communication unit 34 feeds back to master control equipment 100 by abnormal conditions, master control equipment 100 can long-range demonstration fluorescent lamp abnormal conditions, and by Long-distance Control, fluorescent lamp is removed obstacles; The control signal of the real-time detection remote transmission of CAN communication unit 34 when controlling ballast 3.The control method of optimum of the present invention can be shown in Figure 9 flow chart.
The ballast that the embodiment of the present invention provides is detected and is judged by 31 pairs of civil powers of control unit, emergency service battery, and by feedback detecting unit, the abnormal conditions of fluorescent lamp are monitored in real time, when electric weight is too low or fluorescent lamp occurs when abnormal, by CAN communication unit by the state feedback of ballast to master control equipment, realized the work at present state of ballast has been monitored in real time, and by CAN bus, ballast has been carried out to Long-distance Control.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. a ballast, comprises power supply importation, be connected with described power supply importation for driving the driver element of fluorescent lamp operation, and for controlling the control section of driver element work; It is characterized in that, the control section of described ballast comprises:
Mode of operation selected cell is contingency mode or light illumination mode for setting the mode of operation of ballast;
Control unit, for according to the mode of operation of selecting, starts described power supply importation and frequency modulation unit;
Frequency modulation unit, for receiving the control signal of described control unit, and to described driver element output pwm pulse control signal;
CAN communication unit, its one end is connected to the control end of described control unit, and the other end of described CAN communication unit is connected to outside master control equipment, for realizing communication with external piloting control equipment;
Abnormality detection unit, for gathering the working condition of power supply importation, and feeds back to described control unit by testing result;
Described control unit, according to the testing result of feedback, sends power supply and adjusts signal to described power supply importation, and passes through CAN communication unit to outside main control device feedback alarm information;
The power supply importation of described ballast comprises: the power input part by mains-supplied divides and divided by the battery powered power input part of emergency service; Described light illumination mode adopts mains-supplied, and described contingency mode adopts emergency service powered battery;
Described abnormality detection unit comprises:
Battery abnormality detection unit, for detection of the output of emergency service battery, and feeds back to described control unit by testing result; And
Whether civil power abnormality detection unit, exist for detection of civil power input, and testing result fed back to described control unit;
Described civil power abnormality detection unit comprises:
Photoelectrical coupler U2, diode D1, diode D2, capacitor C 1, capacitor C 2, capacitor C 3 and capacitor C 4, divider resistance string, resistance R 5, resistance R 6, double-triode valve push-pull circuit; In photoelectrical coupler U2, the negative electrode of diode is connected to an input of mains supply, in photoelectrical coupler U2, the anode of diode is connected to another input of mains supply by the divider resistance series winding being connected in series successively, diode D1 and capacitor C 1 are connected in series in two inputs of mains supply, and the anode that is connected to diode in photoelectrical coupler U2 is held in being connected in series of diode D1 and capacitor C 1; The power end of double-triode valve push-pull circuit is connected a DC offset voltage with the collector electrode of triode in photoelectrical coupler U2 simultaneously, the input of double-triode valve push-pull circuit is connected to the emitter of the triode in photoelectrical coupler U2, and the input of double-triode valve push-pull circuit is by resistance R 5 and capacitor C 2 earths; The negative electrode of diode D2 is connected to the output of double-triode valve push-pull circuit, and the anode of diode D2 is connected to the AC power test side of described control unit as the output of civil power abnormality detection unit; Resistance R 6 is connected in parallel with diode D2, and the negative electrode of diode D2 is by capacitor C 3 ground connection, and the anode of diode D2 is by capacitor C 4 ground connection.
2. ballast as claimed in claim 1, is characterized in that, described battery abnormality detection unit comprises:
Battery low pressure detecting unit, its input connects the output of described emergency service battery, and its output is connected to the DC power supply test side of described control unit;
Described battery low pressure detecting unit is by the operating voltage of emergency service battery described in sample circuit Real-time Obtaining, and this operating voltage is fed back to described control unit, when battery operated voltage lower than set threshold voltage time, described control unit output alarm control signal, and feed back to outside master control equipment by described CAN communication unit.
3. ballast as claimed in claim 1, is characterized in that, described control unit and described frequency modulation unit are integrated in a slice MCU chip.
4. a fluorescent lamp control system, it comprises master control equipment, at least two ballasts that are connected with described master control equipment and the fluorescent lamp being connected with described ballast; It is characterized in that, described ballast is the ballast described in claim 1-3 any one; Described ballast is connected with described master control equipment by CAN bus.
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| CN200910189289.5A CN101742798B (en) | 2009-12-23 | 2009-12-23 | Ballast and fluorescent lamp control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910189289.5A CN101742798B (en) | 2009-12-23 | 2009-12-23 | Ballast and fluorescent lamp control system |
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| CN101742798A CN101742798A (en) | 2010-06-16 |
| CN101742798B true CN101742798B (en) | 2014-07-30 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014062130A1 (en) * | 2012-10-18 | 2014-04-24 | Aztech Technologies Pte Ltd | Led tube for emergency lighting system |
| CN105246187B (en) * | 2014-07-11 | 2018-01-19 | 上海东软载波微电子有限公司 | Emergency-lighting system |
| CN107071997A (en) * | 2017-03-01 | 2017-08-18 | 上海瑞华(集团)有限公司 | A kind of radio scenery lamp integrated control device |
| CN107085403B (en) * | 2017-05-19 | 2019-09-13 | 蓝思科技（长沙）有限公司 | Anticollision circuit and system |
| CN114265347A (en) * | 2021-12-09 | 2022-04-01 | 海鹰企业集团有限责任公司 | Autonomous controllable power-off system |
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| CN200953680Y (en) * | 2006-09-27 | 2007-09-26 | 洪冲祥 | Multi-functional electronic ballast |
| CN200997718Y (en) * | 2006-12-13 | 2007-12-26 | 厦门金龙联合汽车工业有限公司 | Triggering electronic ballast controlling system of fluorescent light in bus |
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