Dual drive portable LED emergency lighting method and apparatus

Abstract

The application relates to the technical field of LED lighting, and provides a dual-drive portable LED emergency lighting method and device. The dual-drive portable LED emergency lighting method comprises the following steps: collecting a commercial power signal in real time through a preset commercial power detection circuit; triggering an abnormal response according to the commercial power signal and a set threshold value, determining a current compensation parameter and a voltage control strategy based on a battery parameter and the commercial power signal, and determining a power signal; determining a current distribution ratio of the commercial power and the battery in a main-backup dual-drive process based on impedance information of an LED, and controlling the commercial power and the battery to output the power signal according to the current distribution ratio; and if the commercial power is detected to be restored through the commercial power detection circuit, switching back to a commercial power mode. Real-time monitoring of the commercial power state, rapid triggering of the abnormal response, dynamic adjustment of the power signal and stable judgment after the commercial power is restored are realized, so that the stability and reliability of the lighting equipment under various conditions are ensured, and the effect and efficiency of the emergency lighting are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED lighting, in particular to a dual-driven portable LED emergency lighting method and device. BACKGROUND

[0002] The dual-driven portable Light-Emitting Diode (LED) emergency lighting method is mainly applied to lighting scenes that require high reliability and portability, such as in homes, outdoors, offices, and factories, especially in cases where power supply is unstable or unexpected, and power failure or emergency situations may cause lighting interruption. The dual-driven portable LED emergency lighting device can serve as backup lighting to provide necessary illumination in emergency situations, ensuring the normal operation of life, production, and business activities.

[0003] The dual-driven portable LED emergency lighting method requires a more reliable driving circuit to ensure that it can quickly switch to a backup power source and maintain stable lighting output in the event of power interruption or voltage fluctuations. However, in the prior art, the voltage is unstable during the power switching process, and the switching delay can easily cause visible brightness fluctuations, resulting in low switching effectiveness. SUMMARY

[0004] The present application provides a dual-driven portable LED emergency lighting method and device, which can at least partially solve the problem of unstable effectiveness of dual-driven LED emergency lighting during power switching.

[0005] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0006] According to one aspect of the present application, a dual-driven portable LED emergency lighting method is provided, comprising: collecting a commercial power signal in real time through a preset commercial power detection circuit; determining whether to trigger an abnormal response according to the commercial power signal and a set threshold; when the abnormal response is triggered, determining a current compensation parameter based on the battery parameters of the LED and the commercial power signal, determining a voltage control strategy based on the gate voltage of the LED driving circuit, and determining a power signal through the current compensation parameter and the voltage control strategy; determining the current distribution ratio of the commercial power and the battery and the real-time impedance of the LED in the main-backup dual-drive process based on the impedance information of the LED, and controlling the commercial power and the battery to output the power signal according to the current distribution ratio and the real-time impedance; and switching back to the commercial power mode if the commercial power recovery is detected through the commercial power detection circuit.

[0007] In the present application, based on the foregoing scheme, the real-time acquisition of the mains signal through the preset mains detection circuit comprises: acquiring the mains signal based on a set frequency through the preset mains detection circuit; and filtering the mains signal through a sliding window.

[0008] In the present application, based on the foregoing scheme, the determination of whether to trigger an abnormal response according to the mains signal and a set threshold comprises: determining a mains parameter based on the real-time mains voltage corresponding to the acquired mains signal; and comparing the mains parameter with a preset first threshold, and if the mains parameter is greater than the first threshold, triggering an abnormal response.

[0009] In the present application, based on the foregoing scheme, when the abnormal response is triggered, the current compensation parameter is determined based on the battery parameter of the LED and the mains signal, the voltage control strategy is determined based on the gate voltage of the LED driving circuit, and the power supply signal is determined through the current compensation parameter and the voltage control strategy, comprising: when the abnormal response is triggered, acquiring the current battery parameter of the LED, the battery parameter comprising a battery current; calculating a current compensation parameter based on the battery current and the mains current corresponding to the mains signal; determining a voltage control strategy based on the maximum value of the gate voltage of the LED driving circuit; and determining a power supply signal based on the current compensation parameter and the voltage control strategy.

[0010] In the present application, based on the foregoing scheme, the determination of the current distribution ratio of the mains and the battery in the main-backup dual-drive process and the real-time impedance of the LED based on the impedance information of the LED, and the control of the mains and the battery to output the power supply signal according to the current distribution ratio and the real-time impedance, comprises: determining the current distribution ratio of the mains and the battery in the main-backup dual-drive process based on the equivalent output impedance of the mains and the battery; predicting the real-time impedance of the LED based on the initial impedance and the initial load current of the LED; and dynamically adjusting the power supply signal output by the mains and the battery according to the real-time impedance and the current distribution ratio.

[0011] In the present application, based on the foregoing scheme, if the mains recovery is detected through the mains detection circuit, the mains mode is switched back, comprising: if the mains recovery is detected through the mains detection circuit, determining whether the mains signal is stable through the hysteresis voltage of the hysteresis comparator; and if the mains signal is stable, switching back to the mains mode.

[0012] In the present application, based on the foregoing scheme, if the mains power recovery is detected by the mains detection circuit, whether the mains signal is stable is determined by the hysteresis voltage of the hysteresis comparator, including: if the mains power recovery is detected by the mains detection circuit, high-frequency noise in the mains signal is removed by using a low-pass filter to generate a smoothed signal; when the real-time voltage in the smoothed signal enters the threshold value range corresponding to the hysteresis voltage, a timer is started; when the cumulative time of the timer reaches the set time length and the real-time voltage does not exceed the threshold value range, it is determined that the mains signal is stable.

[0013] According to an aspect of the present application, a dual-driven portable LED emergency lighting device is provided, comprising:

[0014] The acquisition unit is configured to acquire a mains signal in real time through a preset mains detection circuit.

[0015] The determination unit is configured to determine whether to trigger an abnormal response based on the mains signal and a set threshold value.

[0016] The signal unit is configured to determine a current compensation parameter based on a battery parameter of the LED and the mains signal, determine a voltage control strategy based on a gate voltage of an LED driving circuit, and determine a power supply signal based on the current compensation parameter and the voltage control strategy when the abnormal response is triggered.

[0017] The control unit is configured to determine a current distribution ratio of the mains and the battery in a main-backup dual-drive process and a real-time impedance of the LED based on impedance information of the LED, and control the mains and the battery to output the power supply signal according to the current distribution ratio and the real-time impedance.

[0018] The switching unit is configured to switch back to the mains mode if the mains power recovery is detected by the mains detection circuit.

[0019] According to an aspect of the present application, a computer readable medium having a computer program stored thereon is provided, the computer program being executed by a processor to implement the dual-driven portable LED emergency lighting method as described in the above embodiments.

[0020] According to an aspect of the present application, an electronic device is provided, comprising: one or more processors; a storage device configured to store one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the dual-driven portable LED emergency lighting method as described in the above embodiments.

[0021] According to an aspect of the present application, a computer program product or computer program is provided, which comprises computer instructions stored in a computer readable storage medium. A processor of a computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to cause the computer device to perform the dual-driven portable LED emergency lighting method provided in the various optional implementations described above.

[0022] In the technical solution of the present application, the mains signal is collected in real time by a preset mains detection circuit; whether an abnormal response is triggered is determined according to the mains signal and a set threshold value; when the abnormal response is triggered, a current compensation parameter is determined based on the battery parameter of the LED and the mains signal, a voltage control strategy is determined based on the gate voltage of the LED driving circuit, and a power supply signal is determined by the current compensation parameter and the voltage control strategy; based on the impedance information of the LED, the current distribution ratio of the mains and the battery in the process of dual driving and the real-time impedance of the LED are determined, and the power supply signal is controlled to be output by the mains and the battery according to the current distribution ratio and the real-time impedance; if the mains is detected to be restored by the mains detection circuit, the mains mode is switched back. Real-time monitoring of the mains state is realized, and through rapid triggering of the abnormal response and dynamic adjustment of the power supply signal, the lighting state of the LED can be smoothly transitioned when the mains abnormally jumps, thereby ensuring the stability and reliability of the lighting device in various situations and improving the effect and efficiency of emergency lighting.

[0023] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application. It is readily apparent to one skilled in the art that the following figures are merely some embodiments of the present application, and other figures can be obtained from these figures without creative labor.

[0025] Figure 1 A flowchart of the dual-driven portable LED emergency lighting method in one embodiment of the present application is schematically shown.

[0026] Figure 2 A flowchart of determining the power supply signal in one embodiment of the present application is schematically shown.

[0027] Figure 3 A schematic diagram of the dual-driven portable LED emergency lighting device in one embodiment of the present application is schematically shown.

[0028] Figure 4 A structural diagram of a computer system of an electronic device suitable for implementing the embodiments of the present application is shown. DETAILED DESCRIPTION

[0029] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0030] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the

[0031] The block diagrams in the drawings show only the functional entities and not necessarily the physical separate entities. That is, the functional entities can be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0032] The flow diagrams shown in the drawings are only exemplary and not necessarily to be understood as comprising all contents and operations / steps, nor necessarily to be executed in the described order. For example, some operations / steps can be broken down further, and some operations / steps can be combined or partially combined, so that the actual execution order can be changed according to the actual situation.

[0033] The implementation details of the technical solutions of the present application are described in detail as follows:

[0034] Figure 1 A flow diagram of a dual-driven portable LED emergency lighting method according to an embodiment of the present application is shown. Referring to Figure 1 As shown, the dual-driven portable LED emergency lighting method includes at least steps S110 to S150, which are described in detail as follows:

[0035] In step S110, the mains signal is collected in real time by a preset mains detection circuit.

[0036] In this embodiment, the timing or continuously through integrated in the hardware of the power detection circuit, the AC power parameters of the power signal (such as voltage, current, etc.) are captured and sampled in real time. These samples of the power signal are then converted into digital signals, which are processed and analyzed by the microprocessor or data processing unit in order to monitor the state of the power supply in real time. This process ensures the real-time, accuracy and continuity of the power signal, and provides a reliable data basis for subsequent abnormal judgment, power management strategy adjustment and emergency response mechanism triggering.

[0037] In an embodiment of the present application, the power signal is collected in real time by the preset power detection circuit, including:

[0038] The power signal is collected based on the set frequency by the preset power detection circuit.

[0039] The power signal is filtered by a sliding window.

[0040] In this embodiment, in order to accurately and efficiently collect the state of the power signal, the preset power detection circuit is set, which includes voltage sensor, amplifier and analog to digital converter (ADC) and other components. Among them, the voltage sensor is responsible for converting the high voltage of the power supply into a low voltage signal for subsequent processing. The amplifier is used to amplify this low voltage signal to the level that the ADC can process. Finally, the ADC converts the analog voltage signal into a digital signal for digital signal processing. At the same time, according to the standard frequency of the power supply, the sampling frequency of the ADC is set, and the set frequency in this embodiment can be 1kHZ.

[0041] In order to remove the noise and interference in the power signal and improve the accuracy and stability of the signal. A fixed size window is moved on the power signal, and the average value, median and other statistical operations of the data in the window are calculated to smooth the signal and remove the noise.

[0042] The above process collects the power signal in real time through the power detection circuit, which can quickly capture the fluctuation or interruption of the power supply. Then the sliding window is used to filter the power signal, which can effectively remove the noise and interference in the power signal and improve the signal quality. This helps to more accurately judge the state of the power supply, avoid unnecessary triggering of emergency response due to misjudgment, and also ensures the accuracy of the subsequent current compensation and voltage control strategy.

[0043] In step S120, whether to trigger an abnormal response is judged according to the power signal and the set threshold.

[0044] In this embodiment, the real-time power signal provided by the power detection circuit is received to determine the actual measurement values of the voltage and current of the power signal. Then, the actual measurement values are compared with preset threshold values, which are set according to the normal working range and safety standards of the power. If the actual measurement values exceed the range of the preset threshold values, for example, the voltage is too low or too high, the current fluctuates abnormally, etc., it will be automatically determined that the power is abnormal, and the preset abnormal response mechanism will be triggered immediately. This process is automatic and real-time, which ensures that the system can quickly respond when detecting power abnormalities, thereby ensuring the reliable operation of the emergency lighting device.

[0045] In an embodiment of the present application, whether to trigger an abnormal response is determined according to the power signal and a set threshold value, including:

[0046] Based on the obtained real-time power voltage corresponding to the power signal, the power parameter is determined;

[0047] The power parameter is compared with a preset first threshold value, and if the power parameter is greater than the first threshold value, an abnormal response is triggered.

[0048] In an embodiment of the present application, based on the obtained real-time power voltage in the power signal, the power parameter is determined as:

[0049]

[0050] Wherein, T represents the power frequency cycle at the time of detection, t represents the end time of this sampling, V AC (τ) represents the real-time power voltage, and τ represents the current time.

[0051] In this scheme, the first threshold value is set to measure the normal situation of the power parameter. When the calculated power parameter is greater than the first threshold value, it is determined that the power is abnormal, and an abnormal response is triggered.

[0052] Further, in this embodiment, after judging the abnormality based on the power parameter and triggering the abnormal response, it can be judged again. Specifically, the power signal and the battery parameter are obtained, the power quality and the battery health are determined by evaluation, and then a comprehensive weight is generated by dynamic weighting calculation. When the comprehensive weight is less than a set second threshold value, an abnormal response is triggered. This process combines the battery state based on the evaluation of the power state, which improves the reliability of the abnormal judgment.

[0053] It should be noted that the power supply in this embodiment can include at least two, namely the power and the battery. The power signal represents the current signal under the power supply, and the power parameter represents the attribute value for evaluating the current state of the power signal.

[0054] The above process, based on the comparison result of the real-time mains voltage calculated mains parameters and the first threshold, can quantize the standard of mains anomaly, avoiding the uncertainty of subjective judgment. This accurate determination condition ensures the accuracy and timeliness of emergency response, and also reduces the possibility of false positives and false negatives.

[0055] In step S130, when triggering an abnormal response, a current compensation parameter is determined based on the battery parameters of the LED and the mains signal, a voltage control strategy is determined based on the gate voltage of the LED driving circuit, and a power supply signal is determined by the current compensation parameter and the voltage control strategy.

[0056] In this embodiment, when triggering an abnormal response, the current battery parameters (such as remaining power, battery voltage and internal resistance, etc.) and the real-time data of the mains signal (such as voltage fluctuation and current change, etc.) are comprehensively analyzed. The purpose is to determine appropriate current compensation parameters to make up for the lack of current caused by unstable or interrupted mains, and to develop appropriate voltage control strategies to ensure that the LED lighting device can work stably under different power supply conditions. Based on these calculation results, the output of the power management module can be dynamically adjusted to generate and output a power supply signal that meets the requirements of LED lighting, thereby ensuring continuous and stable power supply of emergency lighting equipment.

[0057] As shown in Figure 2 In one embodiment of the present application, when triggering an abnormal response, a current compensation parameter is determined based on the battery parameters of the LED and the mains signal, a voltage control strategy is determined based on the gate voltage of the LED driving circuit, and a power supply signal is determined by the current compensation parameter and the voltage control strategy, including:

[0058] S210, when triggering an abnormal response, acquiring the current battery parameters of the LED, the battery parameters including battery current;

[0059] S220, based on the battery current and the mains current corresponding to the mains signal, calculating the current compensation parameter;

[0060] S230, based on the maximum value of the gate voltage of the LED driving circuit, determining the voltage control strategy;

[0061] S240, based on the current compensation parameter and the voltage control strategy, determining the power supply signal.

[0062] In one embodiment of the present application, when triggering an abnormal response, first, the current battery parameters of the LED are acquired, such as battery current. Then, based on the battery current and the mains current corresponding to the mains signal, the current compensation parameter Δδ is calculated as:

[0063]

[0064] wherein, π represents a circle constant, arctan(·) represents an inverse tangent function, I BAT (t) represents a battery current, I AC (t) represents a mains current of a mains signal.

[0065] For example, if the mains current I AC (t) = 0.35A, the battery current I BAT (t) = 0.35A, then Δδ = 45°.

[0066] Alternatively, a complementary Pulse Width Modulation (PWM) signal can be generated by a timer to ensure the continuity of the output current phase at the switching moment.

[0067] Then, based on the maximum value of the gate voltage of the LED driving circuit, the voltage control strategy is determined as:

[0068]

[0069] wherein, V GS (t) represents a gate voltage, V GS_max represents the maximum value of the gate voltage; t represents the time counted from the start of the power supply switching; t rise represents the time for the gate voltage to rise from 0 to V GS_max .

[0070] Specifically, according to the above calculation method, the voltage control strategy of the present embodiment is obtained. When 0≤t≤t rise , the gate voltage is determined as As the counting time elapses, when t>t rise , the gate voltage is determined as V GS_max .

[0071] After the current compensation parameter and the voltage control strategy are determined, the power supply signal is determined based on the current compensation parameter and the voltage control strategy. In this way, the turn-on slope of the circuit signal can be controlled, and the current impact can be suppressed by precisely adjusting the rising rate of the MOSFET gate voltage, so that the current impact is limited to ΔI≤0.1A, which makes the current impact better than the fluctuation amplitude of the traditional mechanical relay.

[0072] The above process, when an abnormal response is triggered, determines the current compensation parameter and the voltage control strategy based on the battery parameter and the mains signal, which can dynamically adjust the power supply signal to ensure that the LED can still work stably when the mains is unstable or interrupted. This adaptive adjustment mechanism improves the stability and reliability of the lighting device, and also prolongs the service life of the battery.

[0073] In step S140, based on the impedance information of the LED, the current distribution ratio of the mains and the battery in the main-backup dual-drive process and the real-time impedance of the LED are determined, and the mains and the battery output the power signal according to the current distribution ratio and the real-time impedance.

[0074] In the embodiment, when the current distribution ratio of the mains and the battery in the main-backup dual-drive process needs to be determined, the impedance information of the LED lighting device is first read and analyzed, based on which the current load ratio that the mains and the battery should respectively bear while ensuring the lighting effect is calculated. Subsequently, according to the current distribution ratio, the power management strategy of the mains input end and the battery output end is intelligently adjusted to ensure that the two can work cooperatively and output the power signal according to the predetermined ratio, thereby realizing the optimal use of energy while ensuring the lighting quality.

[0075] In an embodiment of the present application, based on the impedance information of the LED, the current distribution ratio of the mains and the battery in the main-backup dual-drive process and the real-time impedance of the LED are determined, and the mains and the battery output the power signal according to the current distribution ratio and the real-time impedance, comprising:

[0076] Based on the equivalent output impedance of the mains and the battery drive, the current distribution ratio of the mains and the battery in the main-backup dual-drive process is determined;

[0077] Based on the initial impedance and the initial load current of the LED, the real-time impedance of the LED is predicted;

[0078] According to the real-time impedance and the current distribution ratio, the mains and the battery output the power signal dynamically.

[0079] In an embodiment of the present application, in actual application, the thermal impedance of the LED decreases with the increase of the temperature of the transistor junction point inside the semiconductor chip, therefore, the impedance change needs to be predicted in real time to optimize the current distribution. In the embodiment, based on the real-time change of the LED impedance information, the current distribution ratio of the mains and the battery in the main-backup dual-drive process is determined as follows:

[0080]

[0081] Wherein, R AC and R BAT are the equivalent output impedance of the mains and the battery drive respectively, A represents the current distribution ratio of the mains, and B represents the current distribution ratio of the battery.

[0082] After the current distribution ratio is calculated, the real-time impedance R LED (k|k-1) is predicted based on A and B as follows:

[0083] R LED(k|k-1) = A·R LED (k-1) + B·I load (k-1) + ω(k)

[0084] wherein R LED (k-1) represents the initial impedance of the LED, I load (k-1) represents the initial load current, ω(k) is the noise in the process of circuit operation, and k represents time.

[0085] After predicting the real-time impedance, it is determined whether the real-time impedance exceeds a set threshold. If yes, the mains and battery output power signals are dynamically adjusted based on the current distribution ratio.

[0086] For example, in an actual application scenario, it is assumed that the initial impedance R LED (k-1) = 12Ω, the initial load current I load (k-1) = 0.35A. When the junction temperature rises to 60℃, the predicted value R LED (k|k-1) decreases to 10.5Ω, which exceeds the set threshold. At this time, the mains and battery output power signals are dynamically adjusted based on the current distribution ratio.

[0087] In the embodiment, the power signal is also compensated based on the mains signal and the battery parameters, specifically including:

[0088] An equivalent virtual capacitor model is constructed based on the mains signal and the battery parameters, and the capacitance parameter of the equivalent virtual capacitor model is determined.

[0089] When it is detected that the capacitance parameter meets a set condition, the duty cycle of the voltage converter is determined based on the capacitance parameter, and the output voltage is regulated based on the duty cycle.

[0090] In an embodiment of the present application, during the dual-drive switching process, the voltage difference between the mains and the battery drive channels will cause transient energy impact, such as the difference between the mains 220V DC and the battery 48V DC. To solve this problem, the embodiment constructs an equivalent virtual capacitor model and determines the capacitance parameter C eq for the equivalent virtual capacitor model:

[0091]

[0092] wherein I load is the LED load current, such as the load current of a 16W LED, which is generally 0.35A; t switch is the switching time window; V AC (t) is the voltage of the mains, and V BAT(t) respectively represent the voltage values of the mains signal and the battery at time t. When it is detected that the capacitance parameter meets the set condition, i.e., the capacitance parameter is equal to the set value, the duty cycle of the voltage converter is dynamically adjusted, and the output voltage is controlled based on the duty cycle by the controller.

[0093] The above process dynamically adjusts the current distribution ratio of the mains and the battery in the primary and backup dual drive process based on the impedance information of the LED, can adjust the power output in real time according to the actual load condition of the LED, and ensures the stability and consistency of the lighting effect.

[0094] In step S150, if the mains is detected to be restored by the mains detection circuit, the mains mode is switched back.

[0095] In the embodiment of the present application, if the mains detection circuit detects that the mains is restored to normal through its high-precision sensor, i.e., the voltage and current parameters are stable in the preset safe and efficient working range, the system will determine that all requirements for switching back to the mains mode have been met. Then, the switching program is executed to gradually reduce the power output of the battery while gradually increasing the power supply of the mains, ensuring that the conversion process is smooth and seamless. Finally, when the mains completely takes over the power supply and the system confirms its stability, the computer will officially switch back to the mains mode, while continuing to monitor the mains state to ensure that the LED lighting device is provided with stable and reliable power support in any case.

[0096] Specifically, in one embodiment of the present application, if the mains is detected to be restored by the mains detection circuit, the mains mode is switched back, including:

[0097] If the mains is detected to be restored by the mains detection circuit, whether the mains signal is stable is determined by the hysteresis voltage of the hysteresis comparator;

[0098] If the mains signal is stable, the mains mode is switched back.

[0099] Specifically, in one embodiment of the present application, if the mains is detected to be restored by the mains detection circuit, whether the mains signal is stable is determined by the hysteresis voltage of the hysteresis comparator, including:

[0100] If the mains is detected to be restored by the mains detection circuit, high-frequency noise in the mains signal is eliminated by a low-pass filter to generate a smoothed signal;

[0101] When the real-time voltage in the smoothed signal enters the threshold range corresponding to the hysteresis voltage, a timer is started;

[0102] When the cumulative time of the timer reaches the set time length and the real-time voltage does not exceed the threshold range, it is determined that the mains signal is stable.

[0103] In an embodiment of the present application, if the mains detection circuit detects that the mains has recovered, there may be transient fluctuations or noise interference in the voltage, and direct switching may cause equipment damage or abnormal operation. The mains voltage is sampled with a high-frequency signal (such as 1 kHz), and a low-pass filter is used to eliminate high-frequency noise and generate a smooth signal.

[0104] A hysteresis voltage V H is introduced through a hysteresis comparator, and a threshold range is generated based on the hysteresis voltage: {220-V H , 220+V H}. Only when the mains voltage is continuously within this threshold range and the maintenance time exceeds a preset value (such as 100 ms), the hysteresis comparator determines that the current mains state is stable, triggers the switching action, and then switches back to the mains mode.

[0105] The above process, through the hysteresis voltage of the hysteresis comparator to determine whether the mains signal is stable, can effectively avoid frequent switching caused by transient fluctuations in the mains, and improve the stability and service life of the lighting device. At the same time, the use of a low-pass filter to eliminate high-frequency noise and a timer to determine the stability time of the mains further enhances the accuracy and reliability of the determination.

[0106] Further, after confirming that the mains is stable, switching back to the mains mode can fully utilize the stability and economy of the mains, reduce battery consumption, and prolong the emergency lighting time. This intelligent switching mechanism ensures that the lighting device can operate efficiently when the mains is normal, and also provides strong protection for emergency lighting in emergency situations.

[0107] In the technical solution of the present application, the mains signal is collected in real time through a preset mains detection circuit; whether an abnormal response is triggered is determined according to the mains signal and a set threshold; when the abnormal response is triggered, a current compensation parameter is determined based on the battery parameters of the LED and the mains signal, a voltage control strategy is determined based on the gate voltage of the LED driving circuit, and a power signal is determined through the current compensation parameter and the voltage control strategy; based on the impedance information of the LED, the current distribution ratio of the mains and the battery in the primary and backup dual-drive process and the real-time impedance of the LED are determined, and the mains and the battery output the power signal according to the current distribution ratio and the real-time impedance; if the mains detection circuit detects that the mains has recovered, the mains mode is switched back. Real-time monitoring of the mains state, rapid triggering of abnormal responses, dynamic adjustment of the power signal, and stable judgment after the mains recovers are realized, thereby ensuring the stability and reliability of the lighting device in various situations and improving the effect and efficiency of emergency lighting.

[0108] The device embodiment of the present application is introduced below, which can be used to execute the double-driven portable LED emergency lighting method in the above-mentioned embodiments of the present application. It can be understood that the device can be a computer program (including program code) running in a computer device, for example, the device is an application software; the device can be used to execute the corresponding steps in the method provided by the embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the above-mentioned embodiments of the double-driven portable LED emergency lighting method.

[0109] Figure 3 A block diagram of a double-driven portable LED emergency lighting device according to an embodiment of the present application is shown.

[0110] Referring to Figure 3 The double-driven portable LED emergency lighting device according to an embodiment of the present application includes:

[0111] The acquisition unit 310 is configured to acquire a mains signal in real time through a preset mains detection circuit.

[0112] The determination unit 320 is configured to determine whether to trigger an abnormal response according to the mains signal and a set threshold.

[0113] The signal unit 330 is configured to determine a current compensation parameter based on a battery parameter of an LED and the mains signal, determine a voltage control strategy based on a gate voltage of an LED driving circuit, and determine a power supply signal through the current compensation parameter and the voltage control strategy when the abnormal response is triggered.

[0114] The regulation and control unit 340 is configured to determine a current distribution ratio of the mains and the battery in a main-backup double-drive process and a real-time impedance of the LED based on impedance information of the LED, and control the mains and the battery to output the power supply signal according to the current distribution ratio and the real-time impedance.

[0115] The switching unit 350 is configured to switch back to the mains mode if the mains is detected to be restored through the mains detection circuit.

[0116] In the present application, based on the foregoing scheme, the mains signal is acquired in real time through a preset mains detection circuit, including: the mains signal is acquired based on a set frequency through a preset mains detection circuit; the mains signal is filtered through a sliding window.

[0117] In the present application, based on the foregoing scheme, whether to trigger an abnormal response is determined according to the mains signal and a set threshold, including: a mains parameter is determined based on a real-time mains voltage corresponding to the acquired mains signal; the mains parameter is compared with a preset first threshold, and if the mains parameter is greater than the first threshold, the abnormal response is triggered.

[0118] In the present application, based on the foregoing scheme, when the abnormal response is triggered, the current compensation parameter is determined based on the battery parameter of the LED and the mains signal, the voltage control strategy is determined based on the gate voltage of the LED driving circuit, and the power supply signal is determined based on the current compensation parameter and the voltage control strategy, comprising: when the abnormal response is triggered, the current battery parameter of the LED is obtained, and the battery parameter includes the battery current; based on the battery current and the mains current corresponding to the mains signal, the current compensation parameter is calculated; based on the maximum value of the gate voltage of the LED driving circuit, the voltage control strategy is determined; based on the current compensation parameter and the voltage control strategy, the power supply signal is determined.

[0119] In the present application, based on the foregoing scheme, the current distribution ratio of the mains and the battery in the main and backup dual drive process and the real-time impedance of the LED are determined based on the impedance information of the LED, and the mains and the battery output the power supply signal according to the current distribution ratio and the real-time impedance, comprising: based on the equivalent output impedance of the mains and the battery driven, the current distribution ratio of the mains and the battery in the main and backup dual drive process is determined; based on the initial impedance and the initial load current of the LED, the real-time impedance of the LED is predicted; the mains and the battery output power supply signal are dynamically adjusted according to the real-time impedance and the current distribution ratio.

[0120] In the present application, based on the foregoing scheme, if the mains recovery is detected by the mains detection circuit, the mains mode is switched back, comprising: if the mains recovery is detected by the mains detection circuit, it is judged whether the mains signal is stable through the hysteresis voltage of the hysteresis comparator; if the mains signal is stable, the mains mode is switched back.

[0121] In the present application, based on the foregoing scheme, if the mains recovery is detected by the mains detection circuit, it is judged whether the mains signal is stable through the hysteresis voltage of the hysteresis comparator, comprising: if the mains recovery is detected by the mains detection circuit, the high-frequency noise in the mains signal is eliminated by using a low-pass filter to generate a smooth signal; when the real-time voltage in the smooth signal enters the threshold value range corresponding to the hysteresis voltage, the timer is started; when the cumulative time of the timer reaches the set time length and the real-time voltage does not exceed the threshold value range, it is determined that the mains signal is stable.

[0122] In the technical solution of the present application, the mains signal is collected in real time by a preset mains detection circuit; whether an abnormal response is triggered is determined according to the mains signal and a set threshold; when the abnormal response is triggered, the current compensation parameter is determined based on the battery parameter of the LED and the mains signal, the voltage control strategy is determined based on the gate voltage of the LED driving circuit, and the power supply signal is determined by the current compensation parameter and the voltage control strategy; the current distribution ratio of the mains and the battery in the main-backup dual-drive process and the real-time impedance of the LED are determined based on the impedance information of the LED, and the mains and the battery output the power supply signal according to the current distribution ratio and the real-time impedance; if the mains is restored, the mains mode is switched back. Real-time monitoring of the mains state, rapid triggering of the abnormal response, dynamic adjustment of the power supply signal, and stable judgment after the mains is restored are realized, thereby ensuring the stability and reliability of the lighting device under various conditions, and improving the effect and efficiency of the emergency lighting.

[0123] Figure 4 A structural schematic diagram of a computer system of an electronic device suitable for implementing the embodiments of the present application is shown.

[0124] It should be noted that the computer system of the electronic device in the present embodiment is only an example, and should not bring any limitation to the functions and use range of the embodiments of the present application.

[0125] The computer system in the present embodiment includes a central processing unit 401, which can perform various appropriate actions and processes according to the programs stored in the read-only memory 402 or loaded into the random access memory 403 from the storage part 408, such as the dual-drive portable LED emergency lighting method described in the above embodiments. In the random access memory 403, various programs and data required for system operation are also stored. The central processing unit 401, the read-only memory 402, and the random access memory 403 are connected to each other through a bus 404. The input / output interface 405 is also connected to the bus 404.

[0126] The following components are connected to the input / output interface 405: an input portion 406 including input devices such as a keyboard and a mouse; an output portion 407 including output devices such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and a speaker; a storage portion 408 including a hard disk; and a communication portion 409 including a network interface card such as a LAN (Local Area Network) card, a modem, and the like. The communication portion 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the input / output interface 405 as necessary. A removable media 411 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, and the like is attached to the drive 410 as necessary, so that a computer program read therefrom is installed in the storage portion 408 as necessary.

[0127] In particular, the processes described above with reference to the flowcharts can be implemented as a computer software program according to embodiments of the present application. For example, embodiments of the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing computer programs for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by the communication portion 409, and / or installed from the removable media 411. When the computer program is executed by the central processing unit 401, various functions defined in the system of the present application are executed.

[0128] It should be noted that the computer-readable medium in the embodiments of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination thereof. The computer-readable storage medium may, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination thereof. More specific examples of the computer-readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present application, the computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or apparatus. In the present application, the computer-readable signal medium can include a data signal carrying computer-readable computer programs in a baseband or as a part of a carrier wave. Such a propagated data signal can take various forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, which can send, propagate or transmit programs for use by or in conjunction with an instruction execution system, device or apparatus. The computer programs contained in the computer-readable medium can be transmitted by any suitable medium, including but not limited to wireless, wired, or the like, or any suitable combination thereof.

[0129] The flowcharts and block diagrams in the drawings illustrate the possible implementation architectures, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In the flowcharts or block diagrams, each block can represent a module, a program segment or a part of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different orders than that shown in the drawings. For example, two blocks represented in succession can actually be executed substantially in parallel, and sometimes in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams or flowcharts, and the combination of blocks in the block diagrams or flowcharts, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0130] The units described in the embodiments of the present application can be implemented by software, or by hardware, or by a combination of software and hardware. The units described can also be located in a processor. In some cases, the names of the units do not constitute a limitation on the units themselves.

[0131] According to an aspect of the present application, a computer program product or computer program is provided, which includes computer instructions stored in a computer readable storage medium. A processor of a computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer device performs the method provided in the various optional implementation manners described above.

[0132] As another aspect, the present application also provides a computer readable medium, which can be included in the electronic device described in the above embodiments, or can exist separately without being assembled into the electronic device. The computer readable medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to implement the dual-driven portable LED emergency lighting method described in the above embodiments.

[0133] It should be noted that although several modules or units of the device for action execution are mentioned in the above detailed description, the division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into several modules or units.

[0134] From the above description of the embodiments, those skilled in the art can easily understand that the example embodiments described herein can be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solutions according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, U disk, mobile hard disk, etc.) or network, and includes several instructions to make a computing device (which can be a personal computer, server, touch terminal, or network device, etc.) execute the methods according to the embodiments of the present application.

[0135] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the application following the general principles thereof and including such departures from the present disclosure as come within known use or custom in the art.

[0136] It is to be understood that the application is not limited to the precise construction already described above and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should only be limited by the claims appended hereto.

Claims

1. A portable LED emergency lighting method with dual drivers, characterized in that, include: The mains power signal is acquired in real time through a preset mains power detection circuit; Based on the mains power signal and the set threshold, determine whether an abnormal response is triggered; When an abnormal response is triggered, the current compensation parameters are determined based on the LED's battery parameters and the mains power signal, the voltage control strategy is determined based on the gate voltage of the LED driver circuit, and the power supply signal is determined through the current compensation parameters and the voltage control strategy. Based on the impedance information of the LED, the current distribution ratio between the mains power and the battery and the real-time impedance of the LED are determined in the mains and backup dual-drive process. The power supply signal is then controlled to be output by the mains power and the battery according to the current distribution ratio and the real-time impedance. If the mains power detection circuit detects that the mains power has been restored, then switch back to mains power mode; Specifically, when an abnormal response is triggered, current compensation parameters are determined based on the LED's battery parameters and the mains power signal; a voltage control strategy is determined based on the gate voltage of the LED driver circuit; and a power supply signal is determined using the current compensation parameters and the voltage control strategy, including: When an abnormal response is triggered, the current battery parameters of the LED are obtained, including the battery current. Based on the battery current and the mains current corresponding to the mains signal, the current compensation parameter Δδ is calculated as follows: Where π represents the mathematical constant pi, arctan(·) represents the arctangent function, and I BAT (t) represents the battery current, I AC (t) represents the mains current of the mains signal; Based on the maximum value of the gate voltage of the LED driver circuit, the voltage control strategy is determined as follows: Among them, V GS (t) represents the gate voltage, V GS_max The value of the gate voltage is represented by t; t represents the time elapsed since the power switching began; t rise This indicates that the gate voltage rises from 0 to V. GS_max Time; The power supply signal is determined based on the current compensation parameters and the voltage control strategy.

2. The portable LED emergency lighting method with dual drive according to claim 1, characterized in that, The mains power signal is acquired in real time through a preset mains power detection circuit, including: The mains power signal is acquired based on a set frequency through a preset mains power detection circuit; The mains signal is filtered using a sliding window.

3. The portable LED emergency lighting method with dual drive according to claim 1, characterized in that, Based on the mains power signal and a set threshold, determine whether an abnormal response is triggered, including: Based on the real-time mains voltage corresponding to the acquired mains signal, the mains parameters are determined; The mains power parameters are compared with a preset first threshold. If the mains power parameters are greater than the first threshold, an abnormal response is triggered.

4. The portable LED emergency lighting method with dual drive according to claim 1, characterized in that, Based on the impedance information of the LED, the current distribution ratio between the mains power and the battery in the main / standby dual-drive process and the real-time impedance of the LED are determined. The power supply signal is then controlled to be output by the mains power and the battery according to the current distribution ratio and the real-time impedance, including: Based on the equivalent output impedance of mains power and battery drive, the current distribution ratio of mains power and battery in the main and backup dual drive process is determined. Based on the initial impedance and initial load current of the LED, predict the real-time impedance of the LED; The mains power and battery output power signals are dynamically adjusted based on the real-time impedance and the current distribution ratio.

5. The portable LED emergency lighting method with dual drive according to claim 1, characterized in that, If the mains power detection circuit detects that the mains power has been restored, then the system switches back to mains power mode, including: If the mains power is detected to be restored by the mains power detection circuit, the stability of the mains power signal is determined by the hysteresis voltage of the hysteresis comparator. If the mains power signal is stable, switch back to mains power mode.

6. The portable LED emergency lighting method with dual drive according to claim 5, characterized in that, If the mains power recovery is detected by the mains power detection circuit, the stability of the mains power signal is determined by the hysteresis voltage of the hysteresis comparator, including: If the mains power recovery is detected by the mains power detection circuit, then a low-pass filter is used to eliminate high-frequency noise in the mains power signal and generate a smooth signal. When the real-time voltage in the smoothed signal enters the threshold range corresponding to the hysteresis voltage, the timer is started. When the timer accumulates to the set duration and the real-time voltage does not exceed the threshold range, the mains power signal is determined to be stable.

7. A portable LED emergency lighting device with dual drive, characterized in that, include: The acquisition unit is used to acquire mains power signals in real time through a preset mains power detection circuit; The judgment unit is used to determine whether an abnormal response is triggered based on the mains power signal and a set threshold. The signal unit is used to determine current compensation parameters based on the battery parameters of the LED and the mains signal when an abnormal response is triggered, determine a voltage control strategy based on the gate voltage of the LED driving circuit, and determine a power supply signal through the current compensation parameters and the voltage control strategy. The control unit is used to determine the current distribution ratio of the mains power and the battery and the real-time impedance of the LED in the main and backup dual-drive process based on the impedance information of the LED, and to control the mains power and the battery to output the power signal according to the current distribution ratio and the real-time impedance. A switching unit is used to switch back to mains power mode if the mains power detection circuit detects that the mains power has been restored. Specifically, when an abnormal response is triggered, current compensation parameters are determined based on the LED's battery parameters and the mains power signal; a voltage control strategy is determined based on the gate voltage of the LED driver circuit; and a power supply signal is determined using the current compensation parameters and the voltage control strategy, including: When an abnormal response is triggered, the current battery parameters of the LED are obtained, including the battery current. Based on the battery current and the mains current corresponding to the mains signal, the current compensation parameter Δδ is calculated as follows: Where π represents the mathematical constant pi, arctan(·) represents the arctangent function, and I BAT (t) represents the battery current, I AC (t) represents the mains current of the mains signal; Based on the maximum value of the gate voltage of the LED driver circuit, the voltage control strategy is determined as follows: Among them, V GS (t) represents the gate voltage, V GS_max The value of the gate voltage is represented by t; t represents the time elapsed since the power switching began; t rise This indicates that the gate voltage rises from 0 to V. GS_max Time; The power supply signal is determined based on the current compensation parameters and the voltage control strategy.

8. The portable LED emergency lighting device with dual drive according to claim 7, characterized in that, The mains power signal is acquired in real time through a preset mains power detection circuit, including: The mains power signal is acquired based on a set frequency through a preset mains power detection circuit; The mains signal is filtered using a sliding window.

9. The portable LED emergency lighting device with dual drive according to claim 7, characterized in that, Based on the mains power signal and a set threshold, determine whether an abnormal response is triggered, including: Based on the real-time mains voltage corresponding to the acquired mains signal, the mains parameters are determined; The mains power parameters are compared with a preset first threshold. If the mains power parameters are greater than the first threshold, an abnormal response is triggered.

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