Control method for emergency lighting circuit and emergency lighting circuit

Abstract

The present invention discloses a control method for an emergency lighting circuit and an emergency lighting circuit. The control method includes: obtaining the output voltage of the battery pack; after obtaining the output voltage of the battery pack, obtaining the emergency lighting entry condition of the target area in real time. When the target area needs to enter emergency lighting, lighting the emergency lighting fixtures in the target area with a first emergency brightness; calculating the power of the battery pack according to the output voltage of the battery pack after entering emergency lighting; calculating the theoretical emergency lighting duration of the emergency lighting fixtures according to the power of the battery pack and the first emergency brightness; when the theoretical emergency lighting duration is less than the emergency duration threshold, calculating a second emergency brightness according to the emergency duration threshold and the power of the battery pack, and lighting the emergency lighting fixtures with the second emergency brightness. When the theoretical emergency lighting duration is less than the emergency duration threshold, lighting the emergency lighting fixtures with the second emergency brightness, so that the theoretical emergency lighting duration meets the emergency duration requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency lighting, and particularly to a control method for an emergency lighting circuit and an emergency lighting circuit. Background Art

[0002] Nowadays, there are more and more types of emergency lighting fixtures on the market. Emergency lighting fixtures have been applied to various occasions, making emergency lighting more closely related to people's lives. As an important part of the emergency lighting circuit, emergency lighting fixtures provide lighting or indication in some emergency situations.

[0003] During emergency lighting, the emergency lighting circuit is set so that the emergency lighting fixture conducts emergency lighting with a certain emergency lighting brightness and emergency lighting duration. Among them, during emergency lighting, there is often a problem that the emergency lighting duration cannot meet the requirements due to insufficient battery power in the emergency lighting circuit, posing a safety hazard.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] In view of the above deficiencies of the existing technology, the purpose of the present invention is to provide a control method for an emergency lighting circuit and an emergency lighting circuit to solve the problem in the existing technology that the emergency lighting duration cannot meet the requirements due to insufficient battery power in the emergency lighting circuit, posing a safety hazard.

[0006] The technical solution adopted by the present invention to solve its technical problems is: providing a control method for an emergency lighting circuit. The emergency lighting circuit is used for emergency lighting of a target area, and emergency lighting fixtures are provided in the target area. An emergency duration threshold and a first emergency brightness are preset in the emergency lighting circuit. The emergency lighting circuit is provided with a battery pack for supplying power to the emergency lighting fixtures. The control method includes:

[0007] Obtaining the output voltage of the battery pack;

[0008] After obtaining the output voltage of the battery pack, obtaining the emergency lighting entry condition of the target area in real time. When the target area needs to enter emergency lighting, lighting the emergency lighting fixtures in the target area with the first emergency brightness;

[0009] Calculating the power of the battery pack according to the output voltage of the battery pack after entering emergency lighting;

[0010] Calculating the theoretical emergency lighting duration of the emergency lighting fixtures according to the power of the battery pack and the first emergency brightness;

[0011] When the theoretical emergency lighting duration is less than the emergency duration threshold, calculate a second emergency brightness based on the emergency duration threshold and the power of the battery pack, and light the emergency lighting fixture with the second emergency brightness.

[0012] In a further setting of the present invention, a lower limit emergency brightness is also preset in the emergency lighting circuit;

[0013] After the step of, when the theoretical emergency lighting duration is less than the emergency duration threshold, calculating a second emergency brightness based on the emergency duration threshold and the power of the battery pack, and lighting the emergency lighting fixture with the second emergency brightness, the following steps are further included:

[0014] When the second emergency brightness is greater than the lower limit emergency brightness, continue to light the emergency lighting fixture with the second emergency brightness;

[0015] When the second emergency brightness is less than the lower limit emergency brightness, light the emergency lighting fixture with the lower limit emergency brightness and output an emergency abnormal alarm message to the host computer.

[0016] In a further setting of the present invention, after the step of calculating the theoretical emergency lighting duration of the emergency lighting fixture according to the power of the battery pack and the first emergency brightness, the following steps are further included:

[0017] When the theoretical emergency lighting duration of the emergency lighting fixture calculated by using the first emergency brightness and the power of the battery pack is greater than or equal to the emergency duration threshold, continue to light the emergency lighting fixture with the first emergency brightness.

[0018] In a further setting of the present invention, after the step of, when the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, continuing to light the emergency lighting fixture with the first emergency brightness, the following steps are further included:

[0019] Obtain a human body induction signal in the target area;

[0020] Obtain a brightness value in the target area;

[0021] Based on the human body induction signal in the target area and the brightness value of the target area, adjust the brightness of the emergency lighting fixture in real time.

[0022] In a further setting of the present invention, multiple groups of battery packs are provided;

[0023] Between the step of obtaining the output voltage of the battery pack and the step of, after obtaining the output voltage of the battery pack, obtaining the emergency lighting entry condition of the target area in real time, and when the target area needs to enter emergency lighting, lighting the emergency lighting fixture in the target area with the first emergency brightness, the following steps are further included:

[0024] Judge the abnormal situation of the battery pack according to the output voltage of multiple groups of the battery packs. If there is a battery pack with abnormal output voltage, output a fault signal to the host computer;

[0025] Calculate the power of the battery packs with normal output voltage according to the output voltage of the battery packs with normal output voltage;

[0026] Determine the power of the battery packs with normal output voltage;

[0027] Charge the battery packs with normal output voltage in the order of output voltage from high to low based on the power of the battery packs with normal output voltage.

[0028] A further setting of the present invention is that multiple groups of the battery packs are provided;

[0029] The control method further includes:

[0030] After the emergency lighting fixture is lit, obtain the emergency lighting exit condition of the target area in real time;

[0031] Judge whether the target area needs to end the emergency lighting based on the emergency lighting exit condition. When the target area needs to end the emergency lighting, end the emergency lighting.

[0032] A further setting of the present invention is that the emergency lighting entry condition is one of the power failure of the power supply of the lighting equipment in the target area, the emergency lighting circuit enters the emergency self-check mode, and the emergency lighting circuit enters the simulated emergency test;

[0033] The emergency lighting exit condition is one of the power-on of the power supply of the lighting equipment in the target area, the emergency lighting circuit exits the emergency self-check mode, the emergency lighting circuit exits the simulated emergency test, the emergency lighting time in the target area is equal to the emergency duration threshold, the battery pack discharges completely, and the emergency lighting time is less than the emergency duration threshold;

[0034] When the emergency lighting exit condition is one of the power-on of the power supply of the lighting equipment in the target area, the emergency lighting circuit exits the emergency self-check mode, and the emergency lighting circuit exits the simulated emergency test, after the step of judging whether the target area needs to end the emergency lighting based on the emergency lighting exit condition and ending the emergency lighting when the target area needs to end the emergency lighting, the following steps are further included:

[0035] Obtain the output voltage of multiple groups of the battery packs;

[0036] Judge the abnormal conditions of the battery packs according to the output voltages of multiple groups of the battery packs. If there is a battery pack with abnormal output voltage, output a fault signal to the host computer.

[0037] Calculate the power of the battery packs with normal output voltages according to the output voltages of the battery packs with normal output voltages.

[0038] Determine the power of the battery packs with normal output voltages.

[0039] Charge the battery packs with normal output voltages in the order of decreasing output voltage based on the power of the battery packs with normal output voltages.

[0040] The present invention further provides an emergency lighting circuit for emergency lighting of a target area. Emergency lighting fixtures are arranged in the target area. The emergency lighting circuit includes:

[0041] A battery pack for supplying power to the emergency lighting fixtures.

[0042] A condition acquisition module for acquiring the emergency lighting entry condition and the emergency lighting exit condition in the target area.

[0043] A first switch module connected to the battery pack.

[0044] A light source driving module connected to the first switch module and the emergency lighting fixtures.

[0045] A voltage acquisition module for acquiring the output voltage of the battery pack. The voltage acquisition module is connected to the output end of the battery pack.

[0046] A control module connected to the first switch module, the light source driving module, and the voltage acquisition module. An emergency duration threshold and a first emergency brightness are preset in the control module. The control module is used to execute the control method of the emergency lighting circuit as described above.

[0047] A further setting of the present invention is that the emergency lighting circuit further includes:

[0048] A human body sensing module connected to the control module. The human body sensing module is arranged in the target area and is used to output a human body sensing signal when a person appears in the target area.

[0049] A brightness acquisition module connected to the control module. The brightness acquisition module is arranged in the target area and is used to acquire the brightness value in the target area.

[0050] A further setting of the present invention is that the emergency lighting circuit further includes:

[0051] A second switch module, connected to the battery pack and the control module;

[0052] A charging module, connected to the second switch module, the control module and a power supply, for charging the battery pack.

[0053] Advantages of the present invention:

[0054] When the control method of the emergency lighting circuit disclosed in the present invention is used for emergency lighting, after obtaining the output voltage of the battery pack, when it is necessary to enter emergency lighting, first light up the emergency lighting lamps in the target area with the first emergency brightness. Subsequently, calculate the theoretical emergency lighting duration of the emergency lighting lamps according to the battery power and the first emergency brightness. When the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, it indicates that the emergency lighting duration meets the requirements. When the theoretical emergency lighting duration is less than the emergency duration threshold, it indicates that the emergency lighting duration does not meet the requirements. At this time, calculate the second emergency brightness through the battery power and the emergency duration threshold, and light up the emergency lighting lamps with the second emergency brightness, so that the theoretical emergency lighting duration meets the emergency duration requirements. Description of the Drawings

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0056] Figure 1 It is a flowchart of the control method of the emergency lighting circuit of the present invention.

[0057] Figure 2 It is a flowchart before entering emergency lighting in an embodiment of the present invention.

[0058] Figure 3 It is a flowchart after the first emergency brightness does not meet the emergency duration threshold in an embodiment of the present invention.

[0059] Figure 4 It is a flowchart after emergency lighting with the first emergency lighting brightness in an embodiment of the present invention.

[0060] Figure 5 It is a flowchart after entering emergency lighting in an embodiment of the present invention.

[0061] Figure 6 It is a logical flowchart of the control method of the emergency lighting circuit of the present invention.

[0062] Figure 7It is the logic diagram for updating the emergency brightness and emergency duration in an embodiment of the present invention.

[0063] Figure 8 It is the logic diagram for battery pack charging in an embodiment of the present invention.

[0064] Figure 9 It is the logic diagram for judging the conditions for entering emergency lighting in an embodiment of the present invention.

[0065] Figure 10 It is the logic diagram for the charging sequence of the battery pack in an embodiment of the present invention.

[0066] Figure 11 It is the logic diagram for adjusting the emergency lighting brightness when entering emergency lighting in an embodiment of the present invention.

[0067] Figure 12 It is the logic diagram for adjusting the emergency brightness according to the human body induction signal and brightness value in an embodiment of the present invention.

[0068] Figure 13 It is the logic diagram for emergency lighting or emergency lighting self-check or emergency simulation test in an embodiment of the present invention.

[0069] Figure 14 It is the principle block diagram of the emergency lighting circuit of the present invention.

[0070] Figure 15 It is the connection structure diagram between the condition acquisition module and the control module in an embodiment of the present invention.

[0071] Figure 16 It is the circuit diagram of the emergency lighting circuit in an embodiment of the present invention.

[0072] Each label in the drawings: 10. Battery pack; 20. First switch module; 30. Voltage acquisition module; 40. Control module; 50. Condition acquisition module; 501. Voltage detection unit; 502. Self-check mode entry unit; 503. Emergency lighting simulation test unit; 60. Power supply; 70. Charging module; 80. Second switch module; 90. Brightness acquisition module; 100. Human body induction module; 110. Noise acquisition module; 120. Emergency lighting fixture; 130. Light source drive module. Detailed implementation manners

[0073] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the accompanying drawings and are constructed and operated in a specific orientation, and are only for the convenience of describing the present technical solution, rather than indicating that the indicated devices or elements must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0074] The present invention provides a control method for an emergency lighting circuit. This control method for the emergency lighting circuit is applied to the field of emergency lighting technology, and the field of emergency lighting technology can be the emergency lighting in train carriages, the emergency lighting in corridors and passageways, and the emergency lighting in the fire evacuation passages of buildings. Among them, the emergency lighting circuit is used for the emergency lighting of a target area. The target area is provided with emergency lighting fixtures. An emergency duration threshold and a first emergency brightness are preset in the emergency lighting circuit. A battery pack is provided in the emergency lighting circuit, and the battery pack is used to supply power to the emergency lighting fixtures. When supplying power to the emergency lighting fixtures in the emergency lighting circuit, the battery pack supplies power to the emergency lighting fixtures to light up the emergency lighting fixtures. The target area can be areas such as train carriages, corridors and passageways, and fire evacuation passages.

[0075] As Figure 1 、 Figure 6 shown, the control method for this emergency lighting circuit includes the following steps:

[0076] S1. Obtain the output voltage of the battery pack;

[0077] S6. After obtaining the output voltage of the battery pack, obtain the emergency lighting entry condition of the target area in real time. When the target area needs to enter emergency lighting, light up the emergency lighting fixtures in the target area with the first emergency brightness;

[0078] S7. Calculate the power of the battery pack according to the output voltage of the battery pack after entering emergency lighting;

[0079] S8. Calculate the theoretical emergency lighting duration of the emergency lighting fixtures according to the power of the battery pack and the first emergency brightness;

[0080] S10. When the theoretical emergency lighting duration is less than the emergency duration threshold, calculate the second emergency brightness according to the emergency duration threshold and the power of the battery pack, and continue to light up the emergency lighting fixtures with the second emergency brightness.

[0081] In this embodiment, when performing emergency lighting, the set emergency duration threshold and the first emergency brightness are different for different occasions, and those skilled in the art can determine them according to the specific usage occasions. AsFigure 7 As shown, when setting the emergency duration threshold, the current emergency duration threshold can be detected first. If it does not meet the requirements, the emergency duration threshold can be written into the control module from the outside (such as a computer, a DIP switch, etc.), that is, the emergency duration threshold is updated. Similarly, when the first emergency brightness does not meet the requirements, the first emergency brightness can be written into the control module from the outside (such as a computer, a DIP switch, etc.), that is, the first emergency brightness is updated. After setting the emergency duration threshold and the first emergency brightness, the emergency lighting circuit can be powered on and initialized. At this time, the emergency duration threshold and the first emergency brightness are preset in the emergency lighting circuit.

[0082] Among them, as Figure 9 、 Figure 13 shown, the emergency lighting circuit monitors that the lighting device in the target area loses power; or the emergency lighting circuit enters the emergency self-check mode (in order to ensure that the emergency lighting circuit is always in good working condition, the emergency lighting circuit needs to be self-checked regularly); or the emergency lighting circuit enters the simulated emergency test (in order to ensure that the emergency lighting product can have a normal emergency lighting function in case of an emergency, the simulated emergency test will be carried out regularly). That is to say, the emergency lighting entry condition only needs to meet one of the following: the lighting device in the target area loses power, the emergency lighting circuit enters the emergency self-check mode, and the emergency lighting circuit enters the simulated emergency test to enter the emergency lighting.

[0083] After obtaining the output voltage of the battery pack, the emergency lighting entry condition of the target area is obtained. When the target area enters the emergency lighting, the emergency lighting circuit lights up the emergency lighting lamps in the target area with the first emergency brightness. Then, the power of the battery pack is calculated according to the output voltage of the battery pack; further, according to the power of the battery pack and the first emergency brightness, the duration that can be lit when the emergency lighting lamps are lit with the first emergency brightness is calculated, that is, the theoretical emergency lighting duration of the emergency lighting lamps. When the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, it means that the emergency lighting duration of lighting the emergency lighting lamps with the first emergency brightness meets the requirements. At this time, the emergency lighting lamps can be continuously lit with the first emergency brightness; when the theoretical emergency lighting duration is less than the emergency lighting threshold, it means that the emergency lighting duration of lighting the emergency lighting lamps with the first emergency brightness does not meet the requirements. At this time, the second emergency brightness needs to be calculated according to the emergency lighting threshold and the power of the battery pack, and the emergency lighting lamps are continuously lit with the second emergency brightness.

[0084] It can be seen that when the control method of the emergency lighting circuit performs emergency lighting, when the emergency lighting duration of lighting the emergency lighting fixture at the first emergency brightness does not meet the requirements, the second emergency brightness can be calculated according to the battery pack's power and the emergency duration threshold, and the emergency lighting fixture is lit at the second emergency brightness, so that the emergency lighting duration of the emergency lighting fixture meets the emergency duration requirement, that is, the theoretical emergency lighting duration is greater than or equal to the emergency lighting threshold, reducing the safety hazard.

[0085] It should be noted that the theoretical emergency lighting duration refers to the emergency lighting duration of entering the emergency lighting obtained through calculation.

[0086] In some embodiments, as Figure 1 shown, after the step of calculating the theoretical emergency lighting duration of the emergency lighting fixture according to the battery pack's power and the first emergency brightness, the steps include:

[0087] S9. When the theoretical emergency lighting duration of the emergency lighting fixture calculated by the first emergency brightness and the battery pack's power is greater than or equal to the emergency duration threshold, continue to light the emergency lighting fixture at the first emergency brightness.

[0088] Specifically, when performing emergency lighting, when the theoretical emergency lighting duration of the emergency lighting fixture calculated by the first emergency brightness and the battery pack's power is greater than or equal to the emergency duration threshold, the emergency lighting fixture can be continued to be lit at the first emergency brightness.

[0089] In some embodiments, as Figure 4 、 Figure 12 shown, after the step of continuing to light the emergency lighting fixture at the first emergency brightness when the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, it further includes:

[0090] S13. Obtain the human body induction signal in the target area;

[0091] S14. Obtain the brightness value in the target area;

[0092] S15. Based on the human body induction signal and the brightness value, adjust the brightness of the emergency lighting fixture in real time.

[0093] In this embodiment, after continuing to light the emergency lighting fixture at the first emergency brightness, there may be a situation where the number of people in the target area is small or the environmental brightness of the target area can compensate for the emergency brightness. In order to save energy consumption, therefore, when adjusting the brightness of the emergency lighting fixture, the obtained human body induction signal and the brightness value of the target area can be further combined for brightness adjustment.

[0094] Specifically, the natural environmental brightness may compensate for the environmental brightness of the target area. During emergency lighting, there may be people in the target area during one period and no people during another period; or there may be a large number of people in the target area during one period and a small number of people during another period. Therefore, during emergency lighting, the brightness of the emergency lighting can be adjusted by combining the obtained brightness value of the target area and the human body induction signal collected in the target area.

[0095] For example, after entering emergency lighting, if the natural environmental brightness fails to compensate for the environmental brightness of the target area and the number of people in the target area is small, the emergency lighting fixture can be lit with a third emergency brightness, and the third emergency brightness is less than the first emergency brightness. When the emergency lighting is carried out with the third emergency brightness, if the number of people in the target area becomes larger, at this time, the emergency lighting fixture can be lit again with the first emergency brightness.

[0096] For another example, after entering emergency lighting, if the number of people in the target area is large, but the natural environmental brightness can compensate for the environmental brightness of the target area, the emergency lighting fixture can be lit with a third emergency brightness, and the third emergency brightness is less than the first emergency brightness. If the number of people in the target area becomes even larger, at this time, the emergency lighting fixture can be lit again with the first emergency brightness.

[0097] It can be seen that by combining the human body induction signal in the target area and the brightness value of the target area to adjust the brightness of the emergency lighting fixture in real time, energy conservation and emission reduction are achieved while meeting the requirements of emergency lighting.

[0098] Here, it should be noted that the third emergency brightness is not a fixed value, but is negatively correlated with the brightness value of the target area. When the brightness value in the target area is large, it indicates that the natural environmental brightness compensates a large amount for the environmental brightness of the target area, and the third emergency brightness can be a little smaller; when the brightness value in the target area is small, it indicates that the natural environmental brightness compensates a small amount for the environmental brightness of the target area, and the third emergency brightness can be a little larger. The so-called "a little smaller" and "a little larger" refer to the difference between the third emergency brightness and the first emergency brightness. That is, "a little larger" means that the difference between the third emergency brightness and the first emergency brightness can be a little larger, and "a little smaller" means that the difference between the third emergency brightness and the first emergency brightness can be a little smaller, but there is no specific definition for "large" or "small".

[0099] In some embodiments, as Figure 3 、 Figure 11 shown, a lower limit emergency brightness is preset in the emergency lighting circuit;

[0100] After the step of calculating the second emergency brightness according to the emergency duration threshold and the battery pack power and lighting the emergency lighting fixture with the second emergency brightness when the theoretical emergency lighting duration is less than the emergency duration threshold, the following steps are further included:

[0101] S11. When the second emergency brightness is greater than the lower limit emergency brightness, continue to light the emergency lighting fixture at the second emergency brightness;

[0102] S12. When the second emergency brightness is less than the lower limit emergency brightness, light the emergency lighting fixture at the lower limit emergency brightness and output an emergency abnormal alarm message to the host computer.

[0103] Specifically, in some cases, it may occur that the second emergency brightness is less than the lower limit emergency brightness. When the second emergency brightness is less than the lower limit emergency brightness, at this time, it is necessary to light the emergency lighting fixture at the lower limit emergency brightness to meet the requirement of the lower limit emergency brightness. At the same time, the emergency lighting circuit outputs an emergency abnormal alarm message to the host computer to report the fault in advance.

[0104] In some embodiments, such as Figure 2 , Figure 8 and Figure 10 shown, there are multiple sets of battery packs. The steps of obtaining the output voltage of the battery packs and the steps of obtaining the emergency lighting entry condition of the target area in real time after obtaining the output voltage of the battery packs. When the target area needs to enter emergency lighting, the steps of lighting the emergency lighting fixture in the target area at the first emergency brightness also include the steps:

[0105] S2. Judge the abnormal situation of the battery packs according to the output voltages of multiple sets of battery packs. If there is a battery pack with abnormal output voltage, output a fault signal to the host computer;

[0106] S3. Calculate the power of the battery packs with normal output voltage according to the output voltages of the battery packs with normal output voltage;

[0107] S4. Determine the power of the battery packs with normal output voltage;

[0108] S5. Charge the battery packs with normal output voltage in the order of the output voltage from high to low based on the power of the battery packs with normal output voltage.

[0109] Specifically, after the emergency lighting circuit is powered on and before obtaining the emergency lighting entry condition of the target area, the abnormal situation of the battery packs can be judged first according to the output voltages of each group of battery packs. If there is a battery pack with abnormal output voltage, the emergency lighting circuit outputs a fault signal to the host computer to report the fault in advance.

[0110] Further, after judging the situation of multiple battery packs, three situations may occur. The first is that all multiple battery packs are normal; the second is that all multiple battery packs are abnormal; the third is that some of the multiple battery packs are abnormal. Among them, the situation of battery pack failure may be that the output voltage of the battery pack is lower than the lowest value of the output voltage of the normal battery pack; it may also be that after charging for a period of time, the output voltage of the battery pack changes little and is not within the change range of the output voltage of the normal battery pack; it may also be that the output voltage of the battery pack does not change after charging for a period of time. After determining the situation of multiple battery packs, if the emergency lighting has not been entered yet, the battery packs with normal output voltage can be sorted in descending order of output voltage. The battery pack with a high output voltage indicates more power. When charging this battery pack, it can be quickly fully charged. The battery pack with a low output voltage indicates relatively less power (compared with the power of the battery pack with a high output voltage). When charging this battery pack, the charging duration is relatively longer (compared with the charging duration of the battery pack with a high output voltage).

[0111] In this embodiment, the power of the battery packs with normal output voltage is calculated based on the battery packs with normal output voltage. After calculating and determining the power of the battery packs with normal output voltage, when there is a battery pack with insufficient power among the battery packs with normal output voltage, during the charging of the battery pack with insufficient power, until the battery pack with insufficient power is fully charged or the emergency lighting is entered. Here, insufficient power means that the battery pack is not in a fully charged state.

[0112] During specific charging, the charging is carried out in sequence according to the descending order of output voltage. When numbering, the battery pack with the highest output voltage can be labeled as battery pack A (A can be any integer), the battery pack with the second highest output voltage can be labeled as battery pack A + 1, the battery pack with the third highest output voltage can be labeled as battery pack A + 2, the battery pack with the fourth highest output voltage can be labeled as battery pack A + 3. In this way, the other battery packs with normal output voltage are numbered according to the descending order of output voltage (the label of the last numbered battery pack forms an arithmetic sequence). When charging, first charge battery pack A. After battery pack A is fully charged, continue to charge battery pack A + 1. Charge in this order before entering the emergency lighting. This charging method can make a fully charged battery pack appear in the shortest time. When discharging during emergency lighting, the battery pack with the most power can be discharged first.

[0113] For example, when entering the emergency lighting mode, the battery pack labeled A can be used to supply power to the emergency lighting fixtures first. After the battery pack A discharges to the protection voltage, if the emergency lighting is still in progress, the battery pack A stops discharging, and the battery pack A+1 continues to discharge; after the battery pack A+1 discharges to the protection voltage, if the emergency lighting is still in progress, the battery pack A+1 stops discharging, and the battery pack A+2 continues to discharge. Multiple battery packs discharge in this order until all battery packs discharge to the protection voltage or the emergency lighting ends.

[0114] In this embodiment, the battery pack with the most power is used to supply power to the emergency lighting fixtures first, so as to reduce the number of battery pack switches when supplying power to the emergency lighting fixtures; the emergency lighting brightness can also be automatically adjusted according to the charging status of the battery packs. For example, when all multiple battery packs are fully charged and meet the requirements of the emergency duration threshold, the emergency lighting fixtures can be lit with a brightness value greater than the first emergency brightness according to the power of the multiple battery packs.

[0115] In some embodiments, as Figure 5 shown, the control method further includes the following steps:

[0116] S16. After the emergency lighting fixtures are lit, obtain the emergency lighting exit condition of the target area in real time;

[0117] S17. Based on the emergency lighting exit condition, determine whether the emergency lighting in the target area needs to end. When the emergency lighting in the target area needs to end, end the emergency lighting.

[0118] In this embodiment, during the emergency lighting process, the situation where the emergency lighting can end may occur at any time. Specifically, after entering the emergency lighting, the emergency lighting will end if any of the following situations occur. The specific situations include:

[0119] Situation 1: The power supply of the lighting equipment in the target area is powered on;

[0120] Situation 2: The emergency lighting circuit exits the emergency self-check mode;

[0121] Situation 3: The emergency lighting circuit exits the simulated emergency test;

[0122] Situation 4: The emergency lighting time in the target area is equal to the emergency duration threshold;

[0123] Situation 5: All battery packs are discharged and the emergency lighting time is less than the emergency duration threshold.

[0124] In some embodiments, when the emergency lighting exit condition is any one of the emergency lighting end conditions in Scenario 1, Scenario 2, and Scenario 3, it is determined whether the emergency lighting in the target area needs to be ended based on the emergency lighting exit condition. When the emergency lighting in the target area needs to be ended, after the step of ending the emergency lighting, the following steps are further included:

[0125] S18. Obtain the output voltages of multiple battery packs;

[0126] S19. Determine the abnormal conditions of the battery packs according to the output voltages of the multiple battery packs. If there is a battery pack with an abnormal output voltage, output a fault signal to the host computer;

[0127] S20. Calculate the power of the battery packs with normal output voltages according to the output voltages of the battery packs with normal output voltages;

[0128] S21. Determine the power of the battery packs with normal output voltages;

[0129] S22. Charge the battery packs with normal output voltages in descending order of output voltage based on the power of the battery packs with normal output voltages.

[0130] Specifically, when the emergency lighting condition is any one of the emergency lighting end conditions in Scenario 1, Scenario 2, and Scenario 3, after ending the emergency lighting, further obtain the output voltages of multiple battery packs, and determine whether there are abnormal battery packs after the emergency lighting according to the output voltages of the multiple battery packs. When there are abnormal battery packs, the emergency lighting circuit outputs a fault signal to the host computer to report the fault in advance. Similarly, after judging the conditions of multiple battery packs, three situations may occur. The first: all multiple battery packs are normal; the second: all multiple battery packs are abnormal; the third: some of the multiple battery packs are abnormal. After determining the judgment of the conditions of multiple battery packs, calculate the power of the battery packs with normal output voltages. When there are battery packs with insufficient power among the battery packs with normal output voltages, charge the battery packs with insufficient power. Specifically, charge them in descending order of the output voltages of the battery packs with normal output voltages as described above, and no further limitations are made here.

[0131] When the emergency lighting condition is Scenario 4 or Scenario 5, the emergency lighting circuit shuts down after ending the emergency lighting.

[0132] In some embodiments, as Figure 14 、 Figure 16 shown, the present invention also provides an emergency lighting circuit, which can be used for emergency lighting in a target area, and an emergency lighting fixture 120 is arranged in the target area.

[0133] The emergency lighting circuit may include a battery pack 10, a condition acquisition module 50, a voltage acquisition module 30, a first switch module 20, a light source driving module 130, and a control module 40.

[0134] Among them, the battery pack 10 is used to supply power to the emergency lighting fixture 120; the condition acquisition module 50 is used to acquire the emergency lighting entry condition and the emergency lighting exit condition of the target area; the first switch module 20 is connected to the battery pack 10; the light source driving module 130 is connected to the first switch module 20 and the emergency lighting fixture 120; the voltage acquisition module 30 is connected to the output end of the battery pack 10, and the voltage acquisition module 30 is used to acquire the output voltage of the battery pack 10; the control module 40 is connected to the first switch module 20, the light source driving module 130, the condition acquisition module 50, and the voltage acquisition module 30. An emergency duration threshold and a first emergency brightness are preset in the control module 40, and the control module 40 is used to execute the control method of the emergency lighting circuit as described above.

[0135] Specifically, after the control module 40 obtains the output voltage of the battery pack 10 collected by the voltage acquisition module 30, it obtains the emergency lighting entry condition of the target area in real time. When the target area needs to enter emergency lighting, the control module 40 outputs a first control signal to the first switch module 20 to make the first switch module 20 in a conducting state. At this time, the battery pack 10 outputs a supply voltage to the light source driving module 130, and the control module 40 further outputs a second control signal to the light source driving module 130 according to the first emergency brightness, so as to light the emergency lighting fixture 120 in the target area with the first emergency brightness; thereafter, the power of the battery pack 10 is calculated according to the output voltage of the battery pack 10, and the theoretical emergency lighting duration of the emergency lighting fixture 120 is calculated according to the power of the battery pack 10 and the first emergency brightness. Among them, when the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, the control module 40 can continue to light the emergency lighting fixture 120 with the first emergency brightness; when the theoretical emergency lighting duration is less than the emergency duration threshold, the control module 40 calculates a second emergency brightness according to the emergency duration threshold and the power of the battery pack 10, and outputs a second control signal according to the second emergency brightness, so as to light the emergency lighting fixture 120 with the second emergency brightness. Among them, the second control signal output by the control module 40 is a pulse width modulation (PWM, Pulse Width Modulation) signal, and pulse width modulation signals with different duty cycles are output to the light source driving module 130 according to different emergency brightnesses, so as to light the emergency lighting fixture 120 with the corresponding brightness. Specifically, as described in the specific embodiment of the control method of an emergency lighting circuit above, details are not elaborated here.

[0136] Among them, multiple groups of battery packs 10 are provided, and a first switch module 20 is correspondingly provided for each group of battery packs 10. The output ends of multiple first switch modules 20 are connected in parallel to the input end of the light source driving module 130. During emergency lighting, the control module 40 outputs a first control signal to the first switch module 20 corresponding to the battery pack 10 with the highest power at the current moment. After the output voltage of this battery pack 10 drops to the output protection voltage, the control module 40 further outputs a first control signal to the first switch module 20 corresponding to the battery pack 10 with the highest power at the current moment until the emergency lighting ends or the power of multiple groups of battery packs 10 is exhausted.

[0137] Furthermore, the emergency lighting fixture 120 can be an LED (Light Emitting Diode) fixture. Correspondingly, the light source driving module 130 is a DC-DC (direct current to direct current) light source driving circuit capable of outputting different driving voltages or currents through pulse width modulation signals with different duty cycles. The specific circuit structure of the light source driving module 130 is not limited too much here.

[0138] In some embodiments, a lower limit emergency brightness is also set in the control module 40. When the theoretical emergency lighting duration is less than the emergency duration threshold, when the second emergency brightness is greater than the lower limit emergency brightness, the control module 40 outputs a second control signal to the light source driving module 130 to continue lighting the emergency lighting fixture 120 at the second emergency brightness; when the second emergency brightness is less than the lower limit emergency brightness, the control module 40 outputs a second control signal to the light source driving module 130 to light the emergency lighting lamp at the lower limit emergency brightness and output an emergency abnormal alarm message to the host computer. Specifically, as described in the specific embodiments of the control method of the above-mentioned emergency lighting circuit, it will not be elaborated too much here.

[0139] In some embodiments, as Figure 14 shown, the emergency lighting circuit further includes a human body sensing module 100 and a brightness acquisition module 90; among them, the human body sensing module 100 is arranged in the target area and connected to the control module 40. The human body sensing module 100 is used to output a human body sensing signal when a person appears in the target area; the brightness acquisition module 90 is arranged in the target area and connected to the control module 40. The brightness acquisition module 90 is used to acquire the brightness value in the target area.

[0140] Specifically, the natural environment brightness can compensate the environmental brightness of the target area. And during emergency lighting, there may be people in the target area in one time period and no one in another time period; there may also be a large number of people in the target area in one time period and a small number of people in another time period. Therefore, during emergency lighting, the brightness of the emergency lighting can be adjusted in combination with the brightness value of the target area obtained by the control module 40 and the situation of the human body sensing signal obtained in the target area.

[0141] For example, after entering the emergency lighting, if the natural environment brightness fails to compensate for the environmental brightness of the target area and the number of people in the target area is small, the control module 40 can output a second control signal according to the third emergency brightness, so as to light the emergency lighting fixture 120 with the third emergency brightness. When the emergency lighting is performed with the third emergency brightness, if the number of people in the target area becomes larger, at this time, the control module 40 can output the second control signal again according to the first emergency brightness to light the emergency lighting fixture 120 with the first emergency brightness.

[0142] For another example, after entering the emergency lighting, if the number of people in the target area is large, but the natural environment brightness can compensate for the environmental brightness of the target area, the control module 40 can output a second control signal according to the third emergency brightness, so as to light the emergency lighting fixture 120 with the third emergency brightness. The third emergency brightness is less than the first emergency brightness. If the number of people in the target area becomes even larger, at this time, the control module 40 can output the second control signal again according to the first emergency brightness to light the emergency lighting fixture 120 with the first emergency brightness.

[0143] Thus, by combining the human body induction signal and the brightness value in the target area to adjust the brightness of the emergency lighting fixture 120 in real time, energy conservation and emission reduction are achieved while meeting the emergency lighting requirements.

[0144] In this embodiment, the brightness acquisition module 90 can be a brightness acquisition sensor. In order to accurately acquire the brightness value of the target area, multiple brightness acquisition sensors can be set in the target area, and the average value of multiple brightness acquisition sensors can be taken when determining the brightness value.

[0145] The human body induction module 100 can be an infrared passive pyroelectric sensor (PIR Sensor, Passive Infrared Sensor). The personnel situation in the target area is judged through the human body induction signal output by the infrared passive pyroelectric sensor. Among them, multiple infrared passive pyroelectric sensors can be set, and the number of people in the target area can be further judged according to the human body induction signals output by multiple infrared passive pyroelectric sensors. If multiple infrared passive pyroelectric sensors frequently output human body induction signals, it can be considered that the number of people in the target area is large at this time. If the time interval between the output of human body induction signals by multiple infrared passive pyroelectric sensors is long, it can be considered that the number of people in the target area is small at this time. When it is considered that the number of people in the target area is large, the control module 40 can adjust the emergency lighting brightness to the upper limit according to the emergency duration threshold and the power of the battery pack 10, that is, perform emergency lighting with the fourth emergency brightness. When performing emergency lighting with the fourth emergency brightness, the theoretical emergency lighting duration is equal to the emergency duration threshold, so as to make the emergency lighting effect better.

[0146] Furthermore, asFigure 14 As shown, a noise collection module 110 can also be set in the target area. The noise collection module 110 is connected to the control module 40. Through the noise collection module 110, a noise signal in the target area is output to the control module 40. The control module 40 adjusts the emergency lighting brightness according to the magnitude of the noise signal. For example, a noise reference value can be set in the control module 40. If the noise signal is greater than the noise reference value, it is defined as a large noise signal. At this time, the atmosphere in the human target area is relatively tense. That is, after entering the emergency lighting, the atmosphere of the target area is judged through the noise signal. The control module 40 can adjust the emergency lighting brightness to the upper limit according to the emergency duration threshold and the power of the battery pack 10. That is, emergency lighting is performed at the fourth emergency brightness. When emergency lighting is performed at the fourth emergency brightness, the theoretical emergency lighting duration is equal to the emergency duration threshold, so that the emergency lighting effect is better. Among them, the noise collection module 110 can be any noise collection circuit that can implement the above functions, and the specific circuit of the noise collection module 110 is not limited too much here.

[0147] In some embodiments, the emergency lighting circuit further includes a second switch module 80 and a charging module 70; wherein, the second switch module 80 is connected to the battery pack 10 and the control module 40; the charging module 70 is connected to the second switch module 80, the control module 40 and the power supply 60, and the charging module 70 is used to charge the battery pack 10.

[0148] Specifically, the power supply 60 can be alternating current, and the charging module 70 can be a charging circuit that converts alternating current into direct current. The specific circuit of the charging module 70 is not limited too much here.

[0149] When charging the battery pack 10, a fourth control signal is output from the control module 40 to the second switch module 80 to make the second switch module 80 in a conducting state, then the charging module 70 charges the battery pack 10.

[0150] Among them, multiple groups of battery packs 10 are provided, and a second switch module 80 is correspondingly provided for each group of battery packs 10. That is, each group of battery packs 10 is connected in parallel to the charging module 70 through the second switch module 80. When a group of battery packs 10 needs to be charged, a third control signal is output from the control module 40 to the second switch module 80 corresponding to the battery pack 10 to make the second switch module 80 conduct.

[0151] During specific charging, first determine the abnormal conditions of multiple groups of battery packs 10. After determination, a third control signal is output from the control module 40 to the second switch module 80 corresponding to the battery pack 10 with the highest output voltage to make the second switch module 80 in a conducting state to charge the battery pack 10 with the highest output voltage. Thereafter, the battery packs 10 with normal output voltages are charged in order from high to low.

[0152] In some embodiments, the control module 40 may be a circuit built with a single-chip microcomputer as the core device and capable of implementing the above functions. The specific circuit structure is not limited here. The first switch module 20 and the second switch module 80 are both switch circuits capable of implementing the above functions. The specific circuit structure is not limited here.

[0153] As Figure 15 shown, the condition acquisition module 50 may include a voltage detection unit 501, a self-test mode entry unit 502, and an emergency lighting simulation test unit 503. Among them, the voltage detection unit 501 is connected to the output end of the charging module 70. When the output end of the power supply loses power or is powered on, the voltage detection unit 501 can output a level signal to the control module 40. For example, when the output end of the power supply loses power, it outputs a low-level signal to the control module 40, and when the output end of the power supply is powered on, it outputs a high-level signal. The voltage detection unit 501 can be any voltage detection circuit capable of implementing the above functions, and is not specifically limited here. The self-test mode entry unit 502 can be a push-button switch circuit. When the button in the push-button switch circuit is opened or closed, the push-button switch circuit can output different level signals to the control module 40, and then enter or exit the emergency lighting. The self-test mode entry unit 502 can be any push-button switch circuit capable of implementing the above functions, and is not specifically limited here. The emergency lighting simulation test unit 503 can also be a push-button switch circuit. When the button in the push-button switch circuit is opened or closed, the push-button switch circuit can output different level signals to the control module 40, and then enter or exit the emergency lighting. The emergency lighting simulation test unit 503 can be any push-button switch circuit capable of implementing the above functions, and is not specifically limited here.

[0154] Here, it should be pointed out that the description of the embodiments of the above emergency lighting circuit is similar to the description of the embodiments of the control method of the above emergency lighting circuit, and has beneficial effects similar to those of the control method of the above emergency lighting circuit. For technical details not disclosed in the embodiments of the emergency lighting circuit, please refer to the description of the embodiments of the control method of the emergency lighting circuit of the present invention for understanding.

[0155] In summary, the present invention provides a control method and an emergency lighting circuit for an emergency lighting circuit, having the following beneficial effects:

[0156] After obtaining the output voltage of the battery pack, when emergency lighting needs to be entered, first turn on the emergency lighting fixture 120 in the target area with the first emergency brightness. Thereafter, calculate the theoretical emergency lighting duration of the emergency lighting fixture 120 according to the power of the battery pack 10 and the first emergency brightness. When the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, it indicates that the emergency lighting duration meets the requirements. When the theoretical emergency lighting duration is less than the emergency duration threshold, it indicates that the emergency lighting duration does not meet the requirements. At this time, calculate the second emergency brightness through the power of the battery pack 10 and the emergency duration threshold, and turn on the emergency lighting fixture 120 with the second emergency brightness, so that the theoretical emergency lighting duration meets the emergency duration requirements.

[0157] It can be understood that the above embodiments only express the preferred embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the invention patent; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the present invention's rights threshold should fall within the scope covered by the present invention's rights threshold.

Claims

1. A control method for an emergency lighting circuit, wherein the emergency lighting circuit is used for emergency lighting of a target area, the target area is provided with an emergency lighting fixture, the emergency lighting circuit is preset with an emergency duration threshold and a first emergency brightness, the emergency lighting circuit is provided with a battery pack, and the battery pack is used to supply power to the emergency lighting fixture, characterized in that: The control method comprises: Obtaining the output voltage of the battery pack; After acquiring the output voltage of the battery pack, the emergency lighting entry condition of the target area is acquired in real time, and when the target area needs to enter emergency lighting, the emergency lighting fixtures in the target area are lit with the first emergency brightness; After entering the emergency lighting, the power of the battery pack is calculated according to the output voltage of the battery pack; Calculating the theoretical emergency lighting duration of the emergency lighting fixture according to the power of the battery pack and the first emergency brightness; When the theoretical emergency lighting duration is less than the emergency duration threshold, the second emergency brightness is calculated according to the emergency duration threshold and the power of the battery pack, and the emergency lighting fixture is lit at the second emergency brightness.

2. The control method of the emergency lighting circuit according to claim 1, characterized in that: The emergency lighting circuit is also preset with a lower emergency brightness limit; When the theoretical emergency lighting duration is less than the emergency duration threshold, the step of calculating the second emergency brightness according to the emergency duration threshold and the power of the battery pack, and lighting the emergency lighting fixture at the second emergency brightness also includes: When the second emergency brightness is greater than the lower limit emergency brightness, the emergency lighting fixture continues to be lit at the second emergency brightness; When the second emergency brightness is less than the lower limit emergency brightness, the emergency lighting is lit at the lower limit emergency brightness, and emergency abnormality alarm information is output to the host computer.

3. The control method of the emergency lighting circuit according to claim 1, characterized in that: After the step of calculating the theoretical emergency lighting duration of the emergency lighting fixture according to the power of the battery pack and the first emergency brightness, the step further includes: When the theoretical emergency lighting duration of the emergency lighting fixture calculated based on the first emergency brightness and the power of the battery pack is greater than or equal to the emergency duration threshold, the emergency lighting fixture continues to be lit at the first emergency brightness.

4. The control method of the emergency lighting circuit according to claim 3, characterized in that: After the step of continuing to light up the emergency lighting fixture at the first emergency brightness when the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, the step further includes: Acquire a human body sensing signal in the target area; Obtaining the brightness value in the target area; The brightness of the emergency lighting fixture is adjusted in real time based on the human body sensing signal in the target area and the brightness value of the target area.

5. The control method of the emergency lighting circuit according to claim 1, characterized in that: The battery pack is provided with a plurality of groups; The step of obtaining the output voltage of the battery pack and the step of obtaining the emergency lighting entry condition of the target area in real time after obtaining the output voltage of the battery pack, and lighting the emergency lighting fixtures in the target area with the first emergency brightness when the target area needs to enter emergency lighting, further includes: Determine the abnormality of the battery pack according to the output voltages of the plurality of battery packs, and if there is a battery pack with abnormal output voltage, output a fault signal to the host computer; Calculating the power of the battery pack with normal output voltage according to the output voltage of the battery pack with normal output voltage; Determine the power of the battery pack with normal output voltage; The battery packs with normal output voltages are charged in a descending order of output voltage based on the power of the battery packs with normal output voltages.

6. The control method of the emergency lighting circuit according to claim 1 or 4, characterized in that: The battery pack is provided with a plurality of groups; The control method further comprises: When the emergency lighting fixture is turned on, the emergency lighting exit condition of the target area is obtained in real time; It is determined whether the target area needs to terminate the emergency lighting based on the emergency lighting exit condition, and when the target area needs to terminate the emergency lighting, the emergency lighting is terminated.

7. The control method of the emergency lighting circuit according to claim 6, characterized in that: The emergency lighting entry condition is one of the following: power failure of the power supply of the lighting equipment in the target area, the emergency lighting circuit entering the emergency self-test mode, and the emergency lighting circuit entering the simulated emergency test; The emergency lighting exit condition is one of the following: the power supply of the lighting equipment in the target area is powered on, the emergency lighting circuit exits the emergency self-test mode, the emergency lighting circuit exits the simulated emergency test, the emergency lighting time in the target area is equal to the emergency time threshold, the battery pack is discharged and the emergency lighting time is less than the emergency time threshold; When the emergency lighting exit condition is one of the following: the power supply of the lighting equipment in the target area is powered on, the emergency lighting circuit exits the emergency self-test mode, and the emergency lighting circuit exits the simulated emergency test, the step of judging whether the target area needs to end the emergency lighting based on the emergency lighting exit condition, and when the target area needs to end the emergency lighting, the step of ending the emergency lighting further includes: Obtaining output voltages of multiple battery packs; Determine the abnormality of the battery pack according to the output voltages of the plurality of battery packs, and if there is a battery pack with abnormal output voltage, output a fault signal to the host computer; Calculating the power of the battery pack with normal output voltage according to the output voltage of the battery pack with normal output voltage; Determine the power of the battery pack with normal output voltage; The battery packs with normal output voltages are charged in a descending order of output voltage based on the electric quantity of the battery packs with normal output voltages.

8. An emergency lighting circuit for emergency lighting in a target area, wherein emergency lighting fixtures are arranged in the target area, characterized in that: The emergency lighting circuit comprises: A battery pack, used to supply power to the emergency lighting fixture; A condition collection module, used to collect emergency lighting entry conditions and emergency lighting exit conditions in the target area; A first switch module connected to the battery pack; A light source driving module connected to the first switch module and the emergency lighting fixture; A voltage acquisition module, used for acquiring the output voltage of the battery pack, wherein the voltage acquisition module is connected to the output terminal of the battery pack; A control module, the first switch module, the light source driving module and the voltage acquisition module, wherein the control module is preset with an emergency duration threshold and a first emergency brightness, and the control module is used to execute the control method of the emergency lighting circuit as described in any one of claims 1 to 7.

9. The emergency lighting circuit according to claim 8, characterized in that: The emergency lighting circuit also includes: A human body sensing module connected to the control module, the human body sensing module is arranged in the target area, and the human body sensing module is used to output a human body sensing signal when a person appears in the target area; A brightness acquisition module is connected to the control module. The brightness acquisition module is arranged in the target area and is used to acquire the brightness value in the target area.

10. The emergency lighting circuit according to claim 8 or 9, characterized in that: The emergency lighting circuit also includes: A second switch module connected to the battery pack and the control module; A charging module is connected to the second switch module, the control module and the power supply, and the charging module is used to charge the battery pack.

Images