Control method of emergency lighting circuit and emergency lighting circuit

Abstract

The invention discloses a control method of an emergency lighting circuit and the emergency lighting circuit. The control method comprises the following steps: acquiring an output voltage of a battery pack; after the output voltage of the battery pack is obtained, the emergency lighting entering condition of the target area is obtained in real time, and when the target area needs to enter emergency lighting, emergency lighting lamps in the target area are lightened with first emergency brightness; calculating the electric quantity of the battery pack according to the output voltage of the battery pack after emergency lighting; calculating the theoretical emergency lighting duration of the emergency lighting lamp according to the electric quantity of the battery pack and the first emergency brightness; and when the theoretical emergency lighting duration is smaller than the emergency duration threshold value, second emergency brightness is calculated according to the emergency duration threshold value and the electric quantity of the battery pack, and the emergency lighting lamp is lightened at the second emergency brightness. And when the theoretical emergency lighting duration is smaller than the emergency duration threshold value, the emergency lighting lamp is lightened at 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 in particular to a control method of an emergency lighting circuit and an emergency lighting circuit. Background Art

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

[0003] In emergency lighting, the emergency lighting circuit is set to enable the emergency lighting fixtures to perform emergency lighting at a certain emergency lighting brightness and emergency lighting duration. In the case of emergency lighting, the emergency lighting circuit often fails to provide the required emergency lighting duration due to insufficient power in the battery pack, posing a potential safety hazard.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, 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 prior art that the emergency lighting time does not meet the requirements due to insufficient power of the battery pack, posing a safety hazard.

[0006] The technical solution adopted by the present invention to solve the technical problem is: to provide a control method for an emergency lighting circuit, 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, the battery pack is used to supply power to the emergency lighting fixture, and 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.

[0007] According to a further configuration of the present invention, a lower limit emergency brightness is preset in the emergency lighting circuit; 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.

[0008] According to a further configuration 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 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.

[0009] According to a further configuration of the present invention, when the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, the step of continuing to light up the emergency lighting fixture at the first emergency brightness 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.

[0010] According to a further configuration of the present invention, the battery pack is provided in 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.

[0011] According to a further configuration of the present invention, the battery pack is provided in 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.

[0012] In a further arrangement of the present invention, the emergency lighting entry condition is one of the following: a power supply of the lighting equipment in the target area is powered off, the emergency lighting circuit enters an emergency self-test mode, and the emergency lighting circuit enters a 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.

[0013] The present invention further provides an emergency lighting circuit for emergency lighting of a target area, wherein an emergency lighting fixture is arranged in the target area, and 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 above.

[0014] In a further embodiment of the present invention, the emergency lighting circuit further comprises: 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.

[0015] In a further embodiment of the present invention, the emergency lighting circuit further comprises: 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.

[0016] The beneficial effects of the present invention are: When the control method of the emergency lighting circuit disclosed in the present invention performs emergency lighting, after obtaining the output voltage of the battery pack, when it is necessary to enter emergency lighting, the emergency lighting fixtures in the target area are first lit with the first emergency brightness, and then the theoretical emergency lighting duration of the emergency lighting fixtures is calculated according to the power of the battery pack and the first emergency brightness. When the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, it means that the emergency lighting duration meets the requirement. When the theoretical emergency lighting duration is less than the emergency duration threshold, it means that the emergency lighting duration does not meet the requirement. At this time, the second emergency brightness is calculated according to the power of the battery pack and the emergency duration threshold, and the emergency lighting fixtures are lit with the second emergency brightness, so that the theoretical emergency lighting duration meets the emergency duration requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 It is a flow chart of the control method of the emergency lighting circuit of the present invention.

[0019] Figure 2 This is a flow chart before entering emergency lighting in one embodiment of the present invention.

[0020] Figure 3 This is a flow chart after the first emergency brightness does not meet the emergency duration threshold in one embodiment of the present invention.

[0021] Figure 4 This is a flow chart after emergency lighting is performed at a first emergency lighting brightness in one embodiment of the present invention.

[0022] Figure 5 This is a flow chart after entering emergency lighting in one embodiment of the present invention.

[0023] Figure 6 It is a logic flow chart of the control method of the emergency lighting circuit of the present invention.

[0024] Figure 7 It is a logic diagram for updating emergency brightness and emergency duration in one embodiment of the present invention.

[0025] Figure 8 FIG. 1 is a logic diagram of battery pack charging in one embodiment of the present invention.

[0026] Fig. 9 It is a logic diagram for judging the emergency lighting conditions in one embodiment of the present invention.

[0027] Fig.10 is a logic diagram of a battery pack charging sequence in one embodiment of the present invention.

[0028] Fig.11 It is a logic diagram for entering emergency lighting and adjusting the brightness of emergency lighting in one embodiment of the present invention.

[0029] Fig.12 It is a logic diagram for adjusting emergency brightness according to a human body sensing signal and a brightness value in one embodiment of the present invention.

[0030] Fig.13 It is a logic diagram of emergency lighting or emergency lighting self-test or emergency simulation test in one embodiment of the present invention.

[0031] Fig.14 It is a principle block diagram of the emergency lighting circuit of the present invention.

[0032] Fig.15 It is a connection structure diagram of the condition acquisition module and the control module in one embodiment of the present invention.

[0033] Fig.16 is a circuit diagram of an emergency lighting circuit in one embodiment of the present invention.

[0034] The marks in the accompanying drawings are: 10, battery pack; 20, first switch module; 30, voltage acquisition module; 40, control module; 50, condition acquisition module; 501, voltage detection unit; 502, self-test 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 sensing module; 110, noise acquisition module; 120, emergency lighting fixture; 130, light source driving module. DETAILED DESCRIPTION

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0036] The present invention provides a control method for an emergency lighting circuit, which is applied to the field of emergency lighting technology, and the field of emergency lighting technology can be emergency lighting in train carriages, emergency lighting in corridors, and emergency lighting in fire escape passages of buildings. The emergency lighting circuit is used for emergency lighting in a target area, and emergency lighting fixtures are provided in the target area. The emergency lighting circuit is preset with an emergency duration threshold and a first emergency brightness. A battery pack is provided in the emergency lighting circuit, and the battery pack is used to supply power to the emergency lighting fixture. When supplying power to the emergency lighting fixture in the emergency lighting circuit, the battery pack supplies power to the emergency lighting fixture to light up the emergency lighting fixture. The target area can be a train carriage, a corridor, a fire escape passage, and other areas.

[0037] like Figure 1 , Figure 6 As shown, the control method of the emergency lighting circuit includes the following steps: S1, obtaining the output voltage of the battery pack; 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; S7, after entering the emergency lighting, calculate the power of the battery pack according to the output voltage of the battery pack; S8. Calculate the theoretical emergency lighting duration of the emergency lighting fixture according to the power of the battery pack and the first emergency brightness; S10. 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 continues to be lit at the second emergency brightness.

[0038] In this embodiment, when emergency lighting is performed, the emergency duration threshold and the first emergency brightness are set differently for different occasions, and those skilled in the art can determine them according to the specific occasions of use. Figure 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 to the control module from the outside (such as a computer, a dialer, 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 to the control module from the outside (such as a computer, a dialer, 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.

[0039] Among them, Fig. 9 , Fig.13 As shown, the emergency lighting circuit detects that the lighting equipment 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 perform self-checks regularly); or the emergency lighting circuit enters the simulated emergency test (in order to ensure that the emergency lighting products can have normal emergency lighting functions in emergency situations, emergency tests will be simulated regularly). In other words, the emergency lighting entry condition only needs to meet one of the following conditions: the lighting equipment 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.

[0040] 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 fixtures in the target area with the first emergency brightness. Thereafter, the power of the battery pack is calculated according to the output voltage of the battery pack; further, the duration of the emergency lighting fixture that can be lit when it is lit with the first emergency brightness is calculated according to the power of the battery pack and the first emergency brightness, that is, the theoretical emergency lighting duration of the emergency lighting fixture. When the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, it means that the emergency lighting duration of the emergency lighting fixture lit with the first emergency brightness meets the requirements. At this time, the emergency lighting fixture can continue to be 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 the emergency lighting fixture lit with the first emergency brightness does not meet the requirements. At this time, it is necessary to calculate the second emergency brightness according to the emergency lighting threshold and the power of the battery pack, and continue to light the emergency lighting fixture with the second emergency brightness.

[0041] It can be seen that when the control method of the emergency lighting circuit performs emergency lighting, when the emergency lighting duration of the emergency lighting fixture lit with the first emergency brightness does not meet the requirement, the second emergency brightness can be calculated based on the power of the battery pack and the emergency duration threshold, and the emergency lighting fixture is lit with 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, thereby reducing safety hazards.

[0042] It should be noted that the theoretical emergency lighting duration refers to the emergency lighting duration obtained through calculation.

[0043] In some embodiments, Figure 1 As shown, 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 includes the following steps: S9. 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, continue to light the emergency lighting fixture at the first emergency brightness.

[0044] Specifically, during emergency lighting, 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 can continue to be lit at the first emergency brightness.

[0045] In some embodiments, Figure 4 , Fig.12 As shown, when the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, the step of continuing to light the emergency lighting fixture at the first emergency brightness further includes: S13, obtaining a human body sensing signal in the target area; S14, obtaining the brightness value in the target area; S15. Adjust the brightness of the emergency lighting fixture in real time based on the human body sensing signal and the brightness value.

[0046] In this embodiment, after the emergency lighting fixtures continue to be lit at the first emergency brightness, there may be a situation where there are fewer people in the target area or the ambient brightness of the target area can compensate for the emergency brightness. In order to save energy, when adjusting the brightness of the emergency lighting fixtures, the brightness can be further adjusted in combination with the acquired human body sensing signal and the brightness value of the target area.

[0047] Specifically, the brightness of the natural environment may compensate for the ambient brightness of the target area, and when emergency lighting is performed, there may be people in the target area in one time period and no people 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, when emergency lighting is performed, the brightness of the emergency lighting can be adjusted in combination with the brightness value of the target area obtained and the human body sensing signal collected in the target area.

[0048] For example, after entering the emergency lighting, if the natural environment brightness fails to compensate for the ambient brightness of the target area, and there are few people in the target area, the emergency lighting fixtures can be lit at the third emergency brightness. The third emergency brightness is lower than the first emergency brightness. When emergency lighting is performed with the third emergency brightness, if the number of people in the target area increases again, the emergency lighting fixtures can be lit again with the first emergency brightness.

[0049] For another example, after entering the emergency lighting, if there are many people in the target area, but the natural environment brightness can compensate for the ambient brightness of the target area, the emergency lighting fixtures can be lit at the third emergency brightness. The third emergency brightness is lower than the first emergency brightness. If the number of people in the target area becomes larger, at this time, the emergency lighting fixtures can be lit again with the first emergency brightness.

[0050] It can be seen that by combining the human body sensing signal in the target area and the brightness value of the target area to adjust the brightness of the emergency lighting fixtures in real time, energy saving and emission reduction can be achieved while meeting the emergency lighting requirements.

[0051] 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 means that the compensation amount of the natural environment brightness to the ambient brightness of the target area is large, then the third emergency brightness can be smaller; when the brightness value in the target area is small, it means that the compensation amount of the natural environment brightness to the ambient brightness of the target area is small, then the third emergency brightness can be larger. The "smaller" and "larger" here refer to the difference between the third emergency brightness and the first emergency brightness, that is, "larger" means that the difference between the third emergency brightness and the first emergency brightness can be larger, and "smaller" means that the difference between the third emergency brightness and the first emergency brightness can be smaller, but there is no specific definition of large or small.

[0052] In some embodiments, Figure 3 , Fig.11 As shown, the emergency lighting circuit has a preset lower emergency brightness limit; 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 step of lighting the emergency lighting fixture at the second emergency brightness also includes the following steps: S11. When the second emergency brightness is greater than the lower emergency brightness, the emergency lighting fixture continues to be lit at the second emergency brightness; S12. When the second emergency brightness is less than the lower emergency brightness, the emergency lighting is turned on at the lower emergency brightness, and emergency abnormality alarm information is output to the host computer.

[0053] Specifically, in some cases, the second emergency brightness may be lower than the lower emergency brightness. When the second emergency brightness is lower than the lower emergency brightness, it is necessary to light the emergency lighting fixtures at the lower emergency brightness to meet the requirements of the lower emergency brightness. At the same time, the emergency lighting circuit outputs emergency abnormal alarm information to the host computer to report the fault in advance.

[0054] In some embodiments, Figure 2 , Figure 8 and Fig.10 As shown, there are multiple battery packs. The steps of obtaining the output voltage of the battery pack and 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 include the following steps: S2. Determine the abnormality of the battery packs according to the output voltages of the multiple battery packs. If there is a battery pack with abnormal output voltage, output a fault signal to the host computer; S3, calculating the power of the battery pack with normal output voltage according to the output voltage of the battery pack with normal output voltage; S4, determining the power of the battery pack with normal output voltage; S5. Based on the power of the battery packs with normal output voltages, the battery packs with normal output voltages are charged in a descending order of output voltage.

[0055] Specifically, after the emergency lighting circuit is powered on, before obtaining the emergency lighting entry conditions of the target area, the abnormal condition of the battery pack can be judged based on the output voltage of each battery pack. 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.

[0056] Further, after judging the conditions of multiple battery packs, three situations may occur: the first one: multiple battery packs are normal; the second one: multiple battery packs are all abnormal; the third one: multiple battery packs are partially abnormal. Among them, the situation of battery pack failure may be that the output voltage of the battery pack is lower than the minimum value of the output voltage of a normal battery pack; it may also be that the output voltage of the battery pack changes little after charging for a period of time, and is not within the variation range of the output voltage of a 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 emergency lighting has not yet been used, the battery packs with normal output voltages can be sorted from high to low according to the output voltage. The battery packs with high output voltages indicate that there is a lot of power. When charging the battery pack, it can be quickly fully charged. The battery packs with low output voltages indicate that the power is relatively small (compared with the power of the battery packs with high output voltages). When charging the battery pack, the charging time is relatively long (compared with the charging time of the battery packs with high output voltages).

[0057] In this embodiment, the power of the battery group with normal output voltage is calculated based on the battery group with normal output voltage. If there is an insufficient power battery group among the battery groups with normal output voltage, the battery group with insufficient power is charged until the battery group with insufficient power is fully charged or emergency lighting is entered. The insufficient power here means that the battery group is not fully charged.

[0058] When charging, the battery packs are labeled and charged in order of output voltage from high to low. When labeling, 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, and the battery pack with the fourth highest output voltage can be labeled as battery pack A+3. In this way, other battery packs with normal output voltages can be labeled in order of output voltage from high to low (the last battery pack to be labeled is an arithmetic progression). When charging, the battery pack A is charged first. After the charging of the battery pack A is completed, the battery pack A+1 is continued to be charged. In this order, the battery packs are charged before entering the emergency lighting. This charging method can make the fully charged battery pack appear in the shortest time. When discharging the emergency lighting, the battery pack with the most power can be discharged first.

[0059] For example, when entering emergency lighting, the battery group labeled A can be used to power the emergency lighting fixtures. After the battery group A is discharged to the protection voltage, if the emergency lighting is still in use at this time, the battery group A stops discharging and the battery group A+1 continues discharging; after the battery group A+1 is discharged to the protection voltage, if the emergency lighting is still in use at this time, the battery group A+1 stops discharging and the battery group A+2 continues discharging. Multiple battery groups are discharged in this order until all battery groups are discharged to the protection voltage or the emergency lighting is terminated.

[0060] In this embodiment, the emergency lighting fixture is powered by the battery pack with the largest amount of power first, thereby reducing the number of times the battery pack is switched when powering the emergency lighting fixture; the emergency lighting brightness can also be automatically adjusted according to the charging status of the battery pack. For example, when multiple battery packs are fully charged, and the emergency duration threshold requirement is met, the emergency lighting fixture can be illuminated at a brightness value greater than the first emergency brightness according to the power of the multiple battery packs.

[0061] In some embodiments, Figure 5 As shown, the control method also includes the following steps: S16. When the emergency lighting fixtures are turned on, the emergency lighting exit conditions of the target area are obtained in real time; S17. Determine whether the target area needs to end emergency lighting based on the emergency lighting exit condition, and end the emergency lighting when the target area needs to end emergency lighting.

[0062] In this embodiment, the emergency lighting process may be terminated at any time. Specifically, after entering the emergency lighting, any of the following situations will terminate the emergency lighting, including: Case 1: The power supply of the lighting equipment in the target area is powered on; Case 2: The emergency lighting circuit exits the emergency self-test mode; Case 3: The emergency lighting circuit exits the simulated emergency test; Case 4: The emergency lighting time in the target area is equal to the emergency duration threshold; Case 5: All battery packs are discharged and the emergency lighting time is less than the emergency duration threshold.

[0063] In some embodiments, when the emergency lighting exit condition is any one of the emergency lighting end conditions in case 1, case 2, and case 3, it is determined 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, the step of ending the emergency lighting further includes: S18, obtaining output voltages of multiple battery groups; S19, judging the abnormality of the battery packs according to the output voltages of the multiple battery packs, and if there is a battery pack with abnormal output voltage, outputting a fault signal to the host computer; S20, calculating the power of the battery pack with normal output voltage according to the output voltage of the battery pack with normal output voltage; S21, determining the power of the battery pack with normal output voltage; S22 . Based on the power level of the battery packs with normal output voltages, charge the battery packs with normal output voltages in a descending order of output voltage.

[0064] Specifically, when the emergency lighting condition is any one of the emergency lighting termination conditions in case one, case two, and case three, after the emergency lighting is terminated, the output voltage of the multiple battery groups is further obtained, and it is determined whether there is an abnormal battery group after the emergency lighting according to the output voltage of the multiple battery groups. When there is an abnormal battery group, the emergency lighting circuit outputs a fault signal to the host computer to report the fault in advance. Similarly, after judging the situation of the multiple battery groups, three situations may occur. The first one is that the multiple battery groups are normal; the second one is that all the multiple battery groups are abnormal; the third one is that some of the multiple battery groups are abnormal. After determining the situation of the multiple battery groups, the power of the battery group with normal output voltage is calculated. When there is a battery group with insufficient power among the battery groups with normal output voltage, the battery group with insufficient power is charged. Specifically, the charging is carried out in the order of the output voltage of the battery group with normal output voltage from high to low as described above, and no excessive restrictions are made here.

[0065] When the emergency lighting condition is situation four or situation five, the emergency lighting circuit is shut down after the emergency lighting ends.

[0066] In some embodiments, Fig.14 , Fig.16As shown, the present invention further 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.

[0067] 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 .

[0068] 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 collect the emergency lighting entry conditions and emergency lighting exit conditions 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 collect 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, and the control module 40 is preset with an emergency duration threshold and a first emergency brightness, and the control module 40 is used to execute the control method of the emergency lighting circuit as described above.

[0069] Specifically, the control module 40 obtains the output voltage of the battery pack 10 collected by the voltage collection module 30 and obtains the emergency lighting entry condition of the target area in real time. When the target area needs to enter the emergency lighting, the control module 40 outputs a first control signal to the first switch module 20, so that the first switch module 20 is in a conducting state. At this time, the battery pack 10 outputs a power supply voltage to the light source driving module 130. The control module 40 further outputs a second control signal to the light source driving module 130 according to the first emergency brightness, thereby lighting the emergency lighting fixture 120 in the target area with the first emergency brightness; thereafter, the voltage of the battery pack 10 is calculated according to the output voltage of the battery pack 10. The control module 40 calculates 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, wherein when the theoretical emergency lighting duration is greater than or equal to the emergency duration threshold, the control module 40 can continue to light up the emergency lighting fixture 120 at the first emergency brightness; when the theoretical emergency lighting duration is less than the emergency duration threshold, the control module 40 calculates the 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, thereby lighting up the emergency lighting fixture 120 at the second emergency brightness, wherein the second control signal output by the control module 40 is a pulse width modulation (PWM) signal, and outputs a pulse width modulation signal with different duty cycles to the light source driving module 130 according to different emergency brightness, thereby lighting up the emergency lighting fixture 120 at the corresponding brightness. As described in the specific embodiment of the control method of the emergency lighting circuit mentioned above, no further elaboration is made here.

[0070] Among them, there are multiple groups of battery packs 10, and each group of battery packs 10 corresponds to a first switch module 20. The output ends of the multiple first switch modules 20 are connected in parallel to the input end of the light source driving module 130. When emergency lighting is performed, 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 the battery pack 10 is reduced to the output protection voltage, the control module 40 further outputs the 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 the multiple battery packs 10 is exhausted.

[0071] Furthermore, the emergency lighting fixture 120 may be an LED (Light Emitting Diode) fixture, and correspondingly, the light source driving module 130 is a DC-DC (direct current to direct current) light source driving circuit that can output 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 in detail herein.

[0072] In some embodiments, the control module 40 is also provided with a lower limit emergency brightness. When the theoretical emergency lighting duration is less than the emergency duration threshold, and 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, and continues to light up 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, and lights up the emergency lighting fixture at the lower limit emergency brightness, and outputs emergency abnormal alarm information to the host computer. As described in the specific embodiment of the control method of the above-mentioned emergency lighting circuit, no further elaboration is made here.

[0073] In some embodiments, Fig.14 As shown, the emergency lighting circuit also includes a human body sensing module 100 and a brightness acquisition module 90; wherein, the human body sensing module 100 is arranged in the target area and connected to the control module 40, and 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, and the brightness acquisition module 90 is used to collect the brightness value in the target area.

[0074] Specifically, the natural environment brightness can compensate for the ambient brightness of the target area, and when emergency lighting is performed, there may be people in the target area in one time period and no people 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, when emergency lighting is performed, 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 human body sensing signal obtained in the target area.

[0075] For example, after entering the emergency lighting, if the natural environment brightness fails to compensate for the environment 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, thereby lighting the emergency lighting fixture 120 with the third emergency brightness. When emergency lighting is performed with the third emergency brightness, if the number of people in the target area increases again, at this time, the control module 40 can output a second control signal again according to the first emergency brightness, and light the emergency lighting fixture 120 with the first emergency brightness.

[0076] For another example, after entering the emergency lighting, if there are many people in the target area, but the natural environment brightness can compensate for the ambient brightness of the target area, the control module 40 can output a second control signal according to the third emergency brightness, thereby lighting the emergency lighting fixture 120 with the third emergency brightness. The third emergency brightness is lower than the first emergency brightness. If the number of people in the target area becomes larger, at this time, the control module 40 can output a second control signal again according to the first emergency brightness, and light the emergency lighting fixture 120 with the first emergency brightness.

[0077] It can be seen that by adjusting the brightness of the emergency lighting fixture 120 in real time in combination with the human body sensing signal and the brightness value in the target area, energy saving and emission reduction are achieved while meeting the emergency lighting requirements.

[0078] In this embodiment, the brightness acquisition module 90 may be a brightness acquisition sensor. In order to accurately acquire the brightness value of the target area, multiple brightness acquisition sensors may be set in the target area. When determining the brightness value, the average value of the multiple brightness acquisition sensors may be taken.

[0079] The human body sensing module 100 may be an infrared passive pyroelectric sensor (PIR Sensor, Passive Infrared Sensor), which determines the situation of people in the target area through the human body sensing signal output by the infrared passive pyroelectric sensor. Among them, multiple infrared passive pyroelectric sensors may be provided, and the number of people in the target area may be further determined according to the situation of the human body sensing signals output by the multiple infrared passive pyroelectric sensors. If the multiple infrared passive pyroelectric sensors frequently output human body sensing signals, it may be considered that there are more people in the target area at this time. If the time interval between the output of human body sensing signals by the multiple infrared passive pyroelectric sensors is long, it may be considered that there are fewer people in the target area at this time. When it is considered that there are more people in the target area, the control module 40 may adjust the emergency lighting brightness to the upper limit according to the emergency time threshold and the power of the battery pack 10, that is, perform emergency lighting at the fourth emergency brightness. When the emergency lighting is performed at the fourth emergency brightness, the theoretical emergency lighting time is equal to the emergency time threshold, so as to make the emergency lighting effect better.

[0080] Furthermore, if Fig.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, the 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 size 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 artificial target area is relatively tense, that is, after entering the emergency lighting, the atmosphere of the target area is judged by 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, the emergency lighting is performed at the fourth emergency brightness. When the 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 realize the above functions, and the specific circuit of the noise collection module 110 is not too limited here.

[0081] In some embodiments, the emergency lighting circuit also 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.

[0082] Specifically, the power supply 60 may be alternating current, and the charging module 70 may be a charging circuit that converts alternating current into direct current. The specific circuit of the charging module 70 is not limited in detail herein.

[0083] When charging the battery pack 10 , the control module 40 outputs a fourth control signal to the second switch module 80 , so that the second switch module 80 is in a conducting state, and the charging module 70 charges the battery pack 10 .

[0084] Among them, there are multiple groups of battery packs 10, and each group of battery packs 10 corresponds to a second switch module 80, 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, the control module 40 outputs a third control signal to the second switch module 80 corresponding to the battery pack 10, so that the second switch module 80 is turned on.

[0085] During specific charging, the abnormal conditions of the multiple battery packs 10 are first determined. After the determination, the control module 40 outputs a third control signal to the second switch module 80 corresponding to the battery pack 10 with the highest output voltage, so that the second switch module 80 is in a conductive 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.

[0086] In some embodiments, the control module 40 can be a circuit that can realize the above functions with a single chip as the core device, and the specific circuit structure is not limited here. The first switch module 20 and the second switch module 80 are both switch circuits that can realize the above functions, and the specific circuit structure is not limited here.

[0087] like Fig.15As 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 is powered off or 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 is powered off, a low level signal is output to the control module 40, and when the output end of the power supply is powered on, a high level signal is output. The voltage detection unit 501 can be any voltage detection circuit that can achieve the above functions, and is not specifically limited here. The self-test mode entry unit 502 can be a button switch circuit. When the button in the button switch circuit is turned on or off, the button switch circuit can output different level signals to the control module 40, thereby entering or exiting the emergency lighting. The self-test mode entry unit 502 can be any button switch circuit that can achieve 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 turned on or off, the push-button switch circuit can output different level signals to the control module 40, thereby entering or exiting the emergency lighting. The emergency lighting simulation test unit 503 can be any push-button switch circuit that can achieve the above functions, and no specific limitation is made here.

[0088] Here, it should be pointed out that the description of the embodiment of the emergency lighting circuit is similar to the description of the embodiment of the control method of the emergency lighting circuit, and has similar beneficial effects as the control method of the emergency lighting circuit. For technical details not disclosed in the embodiment of the emergency lighting circuit, please refer to the description of the embodiment of the control method of the emergency lighting circuit of the present invention for understanding.

[0089] In summary, the present invention provides a control method for an emergency lighting circuit and an emergency lighting circuit, which have the following beneficial effects: After obtaining the output voltage of the battery pack, when emergency lighting is needed, first light up the emergency lighting fixtures 120 in the target area with the first emergency brightness. Then, calculate the theoretical emergency lighting duration of the emergency lighting fixtures 120 based on 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 means that the emergency lighting duration meets the requirements. When the theoretical emergency lighting duration is less than the emergency duration threshold, it means that the emergency lighting duration does not meet the requirements. At this time, the second emergency brightness is calculated through the power of the battery pack 10 and the emergency duration threshold, and the emergency lighting fixtures 120 are lit with the second emergency brightness, so that the theoretical emergency lighting duration meets the emergency duration requirements.

[0090] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can 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 rights threshold of the present invention should fall within the scope covered by the rights threshold of the present invention.

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.

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