Emergency lighting detection circuit, emergency lighting detection equipment and emergency lamp

Abstract

The utility model relates to the technical field of circuits, and discloses an emergency lighting detection circuit and device and an emergency lamp, and the circuit comprises a sampling multiplexing module, a detection verification module, a logic control module, and a comparison driving module. The sampling multiplexing module is connected with an alternating current network, the detection verification module, the logic control module and the comparison driving module; the detection and verification module is also connected with the logic control module; and the logic control module is also connected with the comparison driving module. Load information, alternating current power supply phase information and alternating current power supply amplitude information in a power grid are used as enabling judgment signals of the emergency lamp, the method can be accurately applied to various use scenes of the emergency lamp, and the illumination stability of the emergency lamp is guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of circuits, in particular to an emergency lighting detection circuit, a device and an emergency lamp. BACKGROUND

[0002] An emergency lamp is a device that provides lighting in the event of a power failure or emergency. AC signal detection technology plays a crucial role in ensuring that the emergency lamp can work normally when the power is off. The emergency lamp detects the presence or absence of AC power to determine whether to switch to a backup power source. By detecting the AC signal, it can ensure that the lamp can start in time when the power is interrupted. Emergency lamps are widely used in public places, commercial buildings and homes to ensure lighting in emergency situations.

[0003] With the development of technology, emergency lamp detection technology has gone through several stages: early emergency lamps use simple circuit design, which detects the power state through relays and switches. This method is high in cost, slow in speed and low in reliability. Now emergency lamps use analog signal processing technology to detect AC signals through operational amplifiers and comparators. This method improves the sensitivity and accuracy of detection. The existing emergency lighting circuit cannot be applied to diversified application scenarios due to the single detection technology, which limits the application scenarios of the emergency lamp. CONTENT OF THE INVENTION

[0004] The application aims to provide an emergency lighting detection circuit, a device and an emergency lamp, which aims to solve the technical problem of limited application scenarios of the emergency lamp due to single detection technology.

[0005] To achieve the above-mentioned purpose, the application provides an emergency lighting detection circuit, which comprises a sampling multiplexing module, a detection verification module, a logic control module and a comparison driving module.

[0006] The sampling multiplexing module is connected with an AC network, the detection verification module, the logic control module and the comparison driving module; the detection verification module is further connected with the logic control module; and the logic control module is further connected with the comparison driving module.

[0007] The sampling multiplexing module is used for sampling and transmitting the initial AC signal and the load impedance in the AC network to the detection verification module and the comparison driving module after the switch is closed.

[0008] The detection verification module is used for detecting the state of the current AC signal by comparing the initial AC signal with a reference threshold, and acquiring the AC amplitude by performing port verification on an external chip to obtain the phase information of the zero line and the live line in the AC network after the external chip is powered off.

[0009] The logic control module is configured to switch the AC power-on / off state of the external chip according to the current AC signal, and switch the connection relationship between the port of the external chip and the zero line and the live line in the AC network according to the AC amplitude;

[0010] The comparison driving module is configured to start the emergency light when the load impedance is less than a set threshold, the AC power-on / off state is in an AC power-off state, and the AC amplitude is lower than a preset amplitude.

[0011] In an embodiment, the sampling multiplexing module comprises a first resistor to a fourth resistor, a first MOS tube and a second MOS tube.

[0012] A first end of the first resistor is connected to the zero line, and a second end of the first resistor is connected to a first end of the detection verification module and a first end of the third resistor.

[0013] A first end of the second resistor is connected to the live line, and a second end of the second resistor is connected to a second end of the detection verification module and a first end of the fourth resistor.

[0014] A second end of the third resistor is connected to a drain of the first MOS tube.

[0015] A second end of the fourth resistor is connected to a drain of the second MOS tube.

[0016] A gate of the first MOS tube is connected to a first end of the external chip, and a source of the first MOS tube is connected to a source of the second MOS tube.

[0017] A gate of the second MOS tube is connected to a second end of the external chip.

[0018] In an embodiment, the detection verification module comprises an AC detection unit and a port mixed connection verification unit.

[0019] A first end of the AC detection unit is connected to the sampling multiplexing module, and the port mixed connection verification unit is connected to a second end of the AC detection unit and the logic control module.

[0020] The AC detection unit is configured to detect the state of the current AC signal by comparing the initial AC signal with a reference threshold.

[0021] The port mixed connection verification unit is configured to detect the phase information of the zero line and the live line in the AC network, and perform port verification on the external chip to obtain the AC amplitude after the external chip is powered off.

[0022] In an embodiment, the AC detection unit comprises a third MOS tube to a sixth MOS tube.

[0023] The source of the third MOS tube is connected with the firewire, the drain of the third MOS tube is connected with the first end of the logic control module, and the gate of the third MOS tube is connected with the first end of the sampling multiplexing module;

[0024] The source of the fourth MOS tube is connected with the zero wire, the drain of the fourth MOS tube is connected with the second end of the logic control module, and the gate of the fourth MOS tube is connected with the second end of the sampling multiplexing module;

[0025] The drain of the fifth MOS tube is connected with the drain of the third MOS tube, the gate of the fifth MOS tube is connected with the first end of the sampling multiplexing module, and the source of the fifth MOS tube is connected with the source of the sixth MOS tube;

[0026] The drain of the sixth MOS tube is connected with the drain of the fourth MOS tube, and the gate of the sixth MOS tube is connected with the second end of the sampling multiplexing module.

[0027] In an embodiment, the port mixing verification unit comprises a comparator, a latch, a flip-flop, a first double switch, a second double switch, a fifth resistor and a sixth resistor;

[0028] The first end of the comparator is connected with the second end of the sixth resistor, the first end of the first double switch and the second end of the second double switch, the second end of the comparator is connected with the second end of the fifth resistor, the second end of the first double switch and the first end of the second double switch, and the third end of the comparator is connected with the first end of the latch;

[0029] The second end of the latch is connected with the first end of the flip-flop;

[0030] The second end of the flip-flop is connected with the third end of the first double switch, the third end of the flip-flop is connected with the third end of the second double switch, and the fourth end of the flip-flop is connected with the third port of the external chip;

[0031] The third end of the first double switch is also connected with the first end of the external chip, and the third end of the second double switch is also connected with the second end of the external chip;

[0032] The first end of the fifth resistor is connected with one of the zero wire and the firewire, and the first end of the sixth resistor is connected with the other of the zero wire and the firewire.

[0033] In an embodiment, the comparison driving module comprises a load comparison unit, an amplitude comparison unit and a driving unit;

[0034] The load comparison unit is connected to a third end of the sampling multiplexing module, and the amplitude comparison unit is connected to the third end of the sampling multiplexing module and the external chip;

[0035] The load comparison unit is configured to compare the load impedance with the set threshold value.

[0036] The amplitude comparison unit is configured to compare the AC amplitude with the preset amplitude.

[0037] The driving unit is configured to start the emergency light when the load impedance is less than the set threshold value, the AC power-on / off state is in the AC power-off state, and the AC amplitude is lower than the preset amplitude.

[0038] In an embodiment, the load comparison unit comprises a seventh resistor to a tenth resistor, a seventh MOS tube, an eighth MOS tube, and a first comparator.

[0039] A first end of the seventh resistor is connected to a first end of the eighth resistor through the load impedance, and a second end of the seventh resistor is connected to a first end of the ninth resistor and a first end of the sampling multiplexing module.

[0040] A second end of the eighth resistor is connected to a first end of the tenth resistor and a second end of the sampling multiplexing module.

[0041] A second end of the ninth resistor is connected to a drain of the seventh MOS tube, and a second end of the tenth resistor is connected to a drain of the eighth MOS tube.

[0042] A source of the seventh MOS tube is connected to a source of the eighth MOS tube, a gate of the seventh MOS tube is connected to a first end of the external chip, and a gate of the eighth MOS tube is connected to a second end of the external chip.

[0043] A first end of the first comparator is connected to a second end of the eighth resistor and a first end of the tenth resistor, and a second end of the first comparator is connected to the driving unit.

[0044] In an embodiment, the amplitude comparison unit comprises an eleventh to a fourteenth resistor, a ninth MOS tube, a tenth MOS tube, and a second comparator.

[0045] A first end of the eleventh resistor is connected to the zero line, and a second end of the eleventh resistor is connected to a first end of the thirteenth resistor and a first end of the second comparator.

[0046] A first end of the twelfth resistor is connected to the live line, and a second end of the twelfth resistor is connected to a first end of the fourteenth resistor and a second end of the second comparator.

[0047] The second end of the thirteenth resistor is connected to the drain of the ninth MOS tube;

[0048] The second end of the fourteenth resistor is connected to the drain of the tenth MOS tube;

[0049] The gate of the ninth MOS tube is connected to the first end of the external chip, and the source of the ninth MOS tube is connected to the source of the tenth MOS tube;

[0050] The gate of the tenth MOS tube is connected to the second end of the external chip;

[0051] The third end of the second comparator is connected to the driving unit.

[0052] In addition, to achieve the above object, the application further provides an emergency lighting detection device, which comprises the emergency lighting detection circuit.

[0053] In addition, to achieve the above object, the application further provides an emergency lamp, which comprises the emergency lighting detection circuit.

[0054] The application provides an emergency lighting detection circuit, which comprises a sampling multiplexing module, a detection verification module, a logic control module and a comparison driving module; the sampling multiplexing module is connected to an alternating current network, the detection verification module, the logic control module and the comparison driving module; the detection verification module is further connected to the logic control module; the logic control module is further connected to the comparison driving module; the sampling multiplexing module is used for sampling an initial alternating current signal and a load impedance in the alternating current network after a switch is closed and transmitting the initial alternating current signal and the load impedance to the detection verification module and the comparison driving module; the detection verification module is used for detecting a state of a current alternating current signal by comparing the initial alternating current signal with a reference threshold value, and acquiring an alternating current amplitude by performing port verification on an external chip after the external chip is powered off by detecting phase information of a zero line and a live line in the alternating current network; the logic control module is used for switching an alternating current power-on and power-off state of the external chip according to the current alternating current signal, and switching a connection relationship between a port of the external chip and the zero line and the live line in the alternating current network according to the alternating current amplitude; and the comparison driving module is used for starting an emergency lamp when the load impedance is less than a set threshold value, the alternating current power-on and power-off state is in an alternating current power-off state and the alternating current amplitude is lower than a preset amplitude. In the application, load information in a power grid, alternating current power phase information and alternating current power amplitude information are used as enabling judgment signals of the emergency lamp, which can be accurately applied to various use scenarios of the emergency lamp and ensure the stability of emergency lighting. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1Module schematic diagram of the first embodiment of the emergency lighting detection circuit proposed in the present application;

[0056] Figure 2 First circuit connection diagram of the second embodiment of the emergency lighting detection circuit proposed in the present application;

[0057] Figure 3 Second circuit connection diagram of the second embodiment of the emergency lighting detection circuit proposed in the present application;

[0058] Figure 4 Third circuit connection diagram of the second embodiment of the emergency lighting detection circuit proposed in the present application;

[0059] Figure 5 First circuit connection diagram of the third embodiment of the emergency lighting detection circuit proposed in the present application;

[0060] Figure 6 Second circuit connection diagram of the third embodiment of the emergency lighting detection circuit proposed in the present application.

[0061] Brief Description of the Drawings:

[0062] DETAILED DESCRIPTION

[0063] It should be understood that the specific embodiments described herein merely exemplify the present application and are not intended to limit the present application.

[0064] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0065] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0066] In addition, the descriptions involving "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope claimed by the present application.

[0067] Referring to Figure 1 , Figure 1 The module schematic diagram of the first embodiment of the emergency lighting detection circuit proposed in the present application. Based on Figure 1 The first embodiment of the emergency lighting detection circuit proposed in the present application is presented.

[0068] The emergency lighting detection circuit comprises a sampling multiplexing module 100, a detection verification module 200, a logic control module 300 and a comparison driving module 400; the sampling multiplexing module 100 is connected with the AC network, the detection verification module 200, the logic control module 300 and the comparison driving module 400; the detection verification module 200 is further connected with the logic control module 300; the logic control module 300 is further connected with the comparison driving module 400.

[0069] It should be understood that the sampling multiplexing module 100 is connected with the AC network, which means that it can obtain relevant electrical signals such as voltage, current and the like from the AC network. These information is very crucial for detecting the state of the emergency lighting system under normal AC power supply condition. At the same time, it is connected with the detection verification module 200, the logic control module 300 and the comparison driving module 400, so that the signals collected by it can be used by other modules. It plays the role of signal source, and distributes the collected AC network related signals to different modules to realize the function of the entire emergency lighting detection circuit.

[0070] It should be noted that the detection verification module 200 is connected with the sampling multiplexing module 100, and can receive signals about the AC network from the sampling multiplexing module 100. These signals are the basis for the detection and verification work of the detection verification module 200. It is connected with the logic control module 300, which makes the detection verification module 200 can pass the results or related control information to the logic control module 300 after completing the detection and verification work. The logic control module 300 can make further decision or control action according to these information.

[0071] It should be understood that the logic control module 300 is connected with the sampling multiplexing module 100, the detection verification module 200 and the comparison driving module 400, and it is in the control core position of the whole circuit. The information from the sampling multiplexing module 100 and the detection verification module 200 is received, and then the control instruction is sent to the comparison driving module 400 according to the information.

[0072] It should be noted that the comparison driving module 400 is connected with the sampling multiplexing module 100 and the logic control module 300. The original signal from the sampling multiplexing module 100 and the control signal from the logic control module 300 are received. According to the instruction of the logic control module 300, the comparison operation is performed on the signal from the sampling multiplexing module 100, and then the related equipment (such as emergency lighting lamps and lanterns) is driven.

[0073] The sampling multiplexing module 100 is used for sampling the initial alternating current signal in the alternating current network and the load impedance when the switch is closed and transmitting to the detection verification module 200 and the comparison driving module 400.

[0074] It should be understood that when the switch is closed, the sampling multiplexing module 100 is responsible for sampling operation on the initial alternating current signal in the alternating current network and the load impedance. Then the collected information (initial alternating current signal and load impedance) is transmitted to the detection verification module 200 and the comparison driving module 400, so that the subsequent modules can perform corresponding processing based on the data.

[0075] The detection verification module 200 is used for detecting the state of the current alternating current signal by comparing the initial alternating current signal with the reference threshold, and detecting the phase information of the zero line and the live line in the alternating current network to perform port verification on the external chip after the external chip is powered off to obtain the alternating current amplitude.

[0076] It should be noted that the detection verification module 200 compares the initial alternating current signal obtained from the sampling multiplexing module 100 with the reference threshold. Through this comparison method, it can be detected that the current alternating current signal is in which state, for example, whether it is in the normal range or whether it appears abnormal or the like. In addition to detecting the alternating current signal state, the module also detects the phase information of the zero line and the live line in the alternating current network. After the external chip is powered off, the port of the external chip is verified by using the phase information and the like, so as to obtain the alternating current amplitude. The alternating current amplitude has important significance for the operation of the subsequent modules (such as the switching of the logic control module 300 on the connection relationship between the port of the external chip and the zero line and the live line in the alternating current network).

[0077] The logic control module 300 is configured to switch the AC power-on / off state of the external chip according to the current AC signal and switch the connection relationship between the port of the external chip and the zero line and the live line in the AC network according to the AC amplitude.

[0078] It should be understood that the logic control module 300 can switch the AC power-on / off state of the external chip according to the current AC signal detected by the detection verification module 200. For example, if the current AC signal is abnormal, the external chip can be switched to the AC power-off state to protect the chip or other devices. According to the AC amplitude obtained by the detection verification module 200, the logic control module 300 can switch the connection relationship between the port of the external chip and the zero line and the live line in the AC network. Such switching helps to reasonably adjust the connection between the external chip and the zero and live lines according to the actual situation of the AC network (such as the size of the AC amplitude) to ensure the normal operation of the system or meet certain specific needs.

[0079] The comparison driving module 400 is configured to start the emergency light when the load impedance is less than a set threshold, the AC power-on / off state is in the AC power-off state, and the AC amplitude is lower than a preset amplitude.

[0080] It should be noted that the comparison driving module 400 will make a series of condition judgments to determine whether to start the emergency light. When the three conditions are met, i.e., the load impedance is less than the set threshold, the AC power-on / off state is in the AC power-off state, and the AC amplitude is lower than the preset amplitude, it will start the emergency light. This series of condition judgments can ensure that the emergency light can be started in time under certain circuit conditions (such as small load, insufficient AC power supply, and power-off state), providing lighting and other functions for possible emergency situations.

[0081] The application provides an emergency lighting detection circuit, which comprises a sampling multiplexing module 100, a detection verification module 200, a logic control module 300 and a comparison driving module 400; the sampling multiplexing module 100 is connected with an alternating current network, the detection verification module 200, the logic control module 300 and the comparison driving module 400; the detection verification module 200 is further connected with the logic control module 300; the logic control module 300 is further connected with the comparison driving module 400; the sampling multiplexing module 100 is used for sampling an initial alternating current signal in the alternating current network and a load impedance after a switch is closed and transmitting the initial alternating current signal and the load impedance to the detection verification module 200 and the comparison driving module 400; the detection verification module 200 is used for detecting the state of a current alternating current signal by comparing the initial alternating current signal with a reference threshold value, and acquiring an alternating current amplitude by performing port verification on an external chip after the external chip is powered off by detecting phase information of a zero line and a fire line in the alternating current network; the logic control module 300 is used for switching the alternating current on-off state of the external chip according to the current alternating current signal, and switching the connection relationship between the port of the external chip and the zero line and the fire line in the alternating current network according to the alternating current amplitude; and the comparison driving module 400 is used for starting an emergency lamp when the load impedance is less than a set threshold value, the alternating current on-off state is in an alternating current off state and the alternating current amplitude is lower than a preset amplitude. In the application, the load information in the power grid, the alternating current source phase information and the alternating current source amplitude information are used as enabling judgment signals of the emergency lamp, which can be accurately applied to various use scenarios of the emergency lamp and ensure the stability of the emergency lamp lighting.

[0082] Reference Figure 2 , Figure 3 and Figure 4 , Figure 2 FIG. 1 is a first circuit connection diagram of an emergency lighting detection circuit according to a first embodiment of the application; Figure 3 FIG. 2 is a second circuit connection diagram of the emergency lighting detection circuit according to the first embodiment of the application; Figure 4 FIG. 3 is a third circuit connection diagram of the emergency lighting detection circuit according to the first embodiment of the application; and

[0083] The sampling multiplexing module 100 comprises a first resistor R1 to a fourth resistor R4, a first MOS tube MN1 and a second MOS tube MN2; a first end of the first resistor R1 is connected to the zero line, a second end of the first resistor R1 is connected to a first end of the detection verification module 200 and a first end of the third resistor R3; a first end of the second resistor R2 is connected to the fire line, a second end of the second resistor R2 is connected to a second end of the detection verification module 200 and a first end of the fourth resistor R4; a second end of the third resistor R3 is connected to a drain of the first MOS tube MN1; a second end of the fourth resistor R4 is connected to a drain of the second MOS tube MN2; a gate of the first MOS tube MN1 is connected to a first end of the external chip, a source of the first MOS tube MN1 is connected to a source of the second MOS tube MN2; a gate of the second MOS tube MN2 is connected to a second end of the external chip.

[0084] It should be understood that in the external chip AC power-on state, C1 and C2 control the MOS tube to be closed, and the sampled voltage signal is sampled through the S1 and S2 nodes. In the chip AC power-off state, C1 and C2 are controlled by the port mixed connection setting signal to switch the state, and the load LOAD threshold value is detected. In the AC power-on state, the external chip clamps the voltage of the S1 and S2 nodes to Vclamp through the voltage stabilizing diode, avoiding permanent damage to the circuit caused by the too high sampling voltage when sampling the AC voltage. And the AC voltage signal is converted into an AC current signal In, Ip through the sampling resistors R1 and R2, which is handed over to the subsequent circuit for AC state detection.

[0085] The sampling current Ip is determined by the D1 port sampling voltage Ip= (VD1-Vclamp) / R1;

[0086] The sampling current In is determined by the D2 port sampling voltage In= (VD2-Vclamp) / R2;

[0087] The Ip current direction: flowing into the S1 node is positive, and flowing out of the S1 node is negative;

[0088] The In current direction: flowing into the S2 node is positive, and flowing out of the S2 node is negative.

[0089] The detection verification module 200 comprises an AC detection unit 210 and a port mixed connection verification unit 220;

[0090] A first end of the AC detection unit 210 is connected to the sampling multiplexing module 100; the port mixed connection verification unit 220 is connected to a second end of the AC detection unit 210 and the logic control module 300;

[0091] The AC detection unit 210 is configured to detect the state of the current AC signal by comparing the initial AC signal with a reference threshold.

[0092] It should be understood that the first end of the AC detection unit 210 is connected to the sampling multiplexing module 100, and this connection relationship enables the AC detection unit 210 to obtain the initial AC signal from the sampling multiplexing module 100, thereby providing a data basis for subsequent detection work. This unit detects the state of the current AC signal by comparing the initial AC signal with a reference threshold. This comparison detection method is a common signal detection method, and the setting of the reference threshold is based on the definition of the normal state of the AC signal by the system. When the value of the AC signal meets certain conditions (such as greater than, less than, or within a certain range) relative to the reference threshold, it can be determined that the AC signal is in a certain specific state, such as a normal state, an abnormal state (such as too high or too low), etc.

[0093] The port mixed connection verification unit 220 is configured to detect the phase information of the zero line and the live line in the AC network, and to perform port verification on the external chip after the external chip is powered off to obtain the AC amplitude.

[0094] It should be noted that the second end of the AC detection unit 210 is connected to the logic control module 300. This connection enables the port mixed connection verification unit 220 to interact with the AC detection unit 210, and at the same time, it is controlled by the logic control module 300 or feeds back relevant information to the logic control module 300. The port mixed connection verification unit 220 has two main functions. One is to detect the phase information of the zero line and the live line in the AC network, which helps to determine the correctness of the wiring of the AC network and other related conditions. For example, in a normal AC circuit, the phase relationship of the zero line and the live line is fixed, and if the phase relationship is abnormal, it may mean that there is a wiring error in the circuit. The second is to perform port verification on the external chip after the external chip is powered off to obtain the AC amplitude. Performing port verification in the powered-off state of the external chip can accurately measure and verify the AC amplitude related to the port without working on the chip, so as to check whether the electrical characteristics of the port meet the expectations, such as whether there is a problem of leakage, short circuit between ports, etc. affecting the AC amplitude.

[0095] The AC detection unit 210 comprises third to sixth MOS transistors MP1-MN4. The source of the third MOS transistor MP1 is connected to the live wire, the drain of the third MOS transistor MP1 is connected to the first end of the logic control module 300, and the gate of the third MOS transistor MP1 is connected to the first end of the sampling multiplexing module 100. The source of the fourth MOS transistor MP2 is connected to the neutral wire, the drain of the fourth MOS transistor MP2 is connected to the second end of the logic control module 300, and the gate of the fourth MOS transistor MP2 is connected to the second end of the sampling multiplexing module 100. The drain of the fifth MOS transistor MN3 is connected to the drain of the third MOS transistor MP1, the gate of the fifth MOS transistor MN3 is connected to the first end of the sampling multiplexing module 100, and the source of the fifth MOS transistor MN3 is connected to the source of the sixth MOS transistor MN4. The drain of the sixth MOS transistor MN4 is connected to the drain of the fourth MOS transistor MP2, and the gate of the sixth MOS transistor MN4 is connected to the second end of the sampling multiplexing module 100.

[0096] It should be understood that the sampled AC current In, Ip is compared with the reference current Iref after being processed, and the amplitude of the AC power is detected. When the AC power is in the positive half cycle, In-Ip is greater than 0, and the ID1 current is compared with the reference current Iref to determine the amplitude of the AC power in the positive half cycle. When ID1 is greater than Iref, LDetect outputs high level, and when ID1 is lower than Iref, LDetect outputs low level. When the AC power is in the negative half cycle, Ip-In is greater than 0, and the ID2 current is compared with the reference current Iref to determine the amplitude of the AC power in the negative half cycle. When ID2 is greater than Iref, NDetect outputs high level, and when ID2 is lower than Iref, NDetect outputs low level. When the AC power exists, the periods of LDetect and NDetect are consistent with the period of the AC signal. By detecting whether there is a high level in LDetect and NDetect within a period of time, it can be determined whether the AC signal exists, so as to determine the working state of the AC power.

[0097] The port mixed connection checking unit 220 comprises an information comparator 221, a latch 222, a flip-flop 223, a first double switch 224, a second double switch 225, a fifth resistor R5 and a sixth resistor R6; a first end of the information comparator 221 is connected with a second end of the sixth resistor R6, a first end of the first double switch 224 and a second end of the second double switch 225, a second end of the information comparator 221 is connected with a second end of the fifth resistor R5, a second end of the first double switch 224 and a first end of the second double switch 225, a third end of the information comparator 221 is connected with a first end of the latch 222; a second end of the latch 222 is connected with a first end of the flip-flop 223; a second end of the flip-flop 223 is connected with a third end of the first double switch 224, a third end of the flip-flop 223 is connected with a third end of the second double switch 225, a fourth end of the flip-flop 223 is connected with a third port of the external chip; the third end of the first double switch 224 is also connected with a first end of the external chip; the third end of the second double switch 225 is also connected with a second end of the external chip; a first end of the fifth resistor R5 is connected with one of the zero line and the fire line; a first end of the sixth resistor R6 is connected with the other of the zero line and the fire line.

[0098] It should be noted that the phase information of the alternating current power on the zero fire line is used to check the port mixed connection of all chip systems on the power grid bus. The chip detects the phase information of the zero fire line at both ends of the port, stores the phase information through a register, detects the alternating current power-off, uses the last stored phase signal as a control signal through the flip-flop 223, switches the preferred path through the double switch to change the connection relationship between the chip internal ports D1 and D2 and the zero fire line, so as to correct the port mixed connection.

[0099] In this embodiment, the sampled alternating current In and Ip are compared with the reference current Iref after operation processing, and the amplitude of the alternating current power is detected. Whether the alternating current signal exists can be judged by detecting whether the high level of LDetect and NDetect exists in a period of time, so as to determine the working state of the alternating current power. The phase information of the alternating current power on the zero fire line is used to check the port mixed connection of all chip systems on the power grid bus. In this application, the load information in the power grid, the phase information of the alternating current power and the amplitude information of the alternating current power are used as the enabling judgment signal of the emergency lamp, which can be accurately applied to various use scenes of the emergency lamp.

[0100] Referring to Figure 5 and Figure 6 , Figure 5 the first circuit connection diagram of the third embodiment of the emergency lighting detection circuit provided in the application; Figure 6The second circuit connection diagram of the third embodiment of the emergency lighting detection circuit provided in the application; the third embodiment of the power-off mute protection circuit of the application is based on the first embodiment and the second embodiment of the power-off mute protection circuit.

[0101] The comparison driving module 400 comprises a load comparison unit 410, an amplitude comparison unit 420 and a driving unit 430. The load comparison unit 410 is connected to the third end of the sampling multiplexing module 100, and the amplitude comparison unit 420 is connected to the third end of the sampling multiplexing module 100 and the external chip. The load comparison unit 410 is used to compare the load impedance with the set threshold value. The amplitude comparison unit 420 is used to compare the AC amplitude with the preset amplitude. The driving unit 430 is used to start the emergency light when the load impedance is less than the set threshold value, the AC on-off state is in the AC off state and the AC amplitude is lower than the preset amplitude.

[0102] It should be understood that the main function of the load comparison unit 410 is to compare the load impedance with the set threshold value. Through this comparison, it can be determined whether the state of the load meets certain requirements, thereby providing a basis for subsequent operations. For example, if the load impedance is higher than the set threshold value, it may indicate that the load is in a normal working state; when the load impedance is less than the set threshold value, it may mean that the load has an abnormal situation, and this result will be used together with other conditions to determine whether to start the emergency light and the like.

[0103] It should be understood that the amplitude comparison unit 420 is responsible for comparing the AC amplitude with the preset amplitude. The AC amplitude reflects the strength of the AC signal in the circuit, and the preset amplitude is a pre-set standard value. When the AC amplitude is lower than the preset amplitude, this condition, together with the result of the load comparison unit 410 and the AC on-off state, is used to determine whether the emergency light needs to be started.

[0104] It should be noted that the driving unit 430 is the execution part of the entire module. When a specific combination of conditions is met, i.e. the load impedance is less than the set threshold value, the AC on-off state is in the AC off state and the AC amplitude is lower than the preset amplitude, it will start the emergency light. This means that when the load appears abnormal (the load impedance is too small), the circuit is in the AC off state and the strength of the AC signal is insufficient (the amplitude is lower than the preset amplitude), the driving unit 430 will take action and start the emergency light to deal with the possible emergency situation.

[0105] The load comparison unit 410 includes: a seventh resistor R7 to a tenth resistor R10, a seventh MOSFET MN5, an eighth MOSFET MN6, and a first comparator 411; the first end of the seventh resistor R7 is connected to the first end of the eighth resistor R8 through the load impedance, and the second end of the seventh resistor R7 is connected to the first end of the ninth resistor R9 and the first end of the sampling multiplexing module 100; the second end of the eighth resistor R8 is connected to the first end of the tenth resistor R10 and the second end of the sampling multiplexing module 100; the second end of the ninth resistor R9 is connected to the drain of the seventh MOSFET MN5; the second end of the tenth resistor R10 is connected to the drain of the eighth MOSFET MN6; the source of the seventh MOSFET MN5 is connected to the source of the eighth MOSFET MN6; the gate of the seventh MOSFET MN5 is connected to the first end of the external chip; the gate of the eighth MOSFET MN6 is connected to the second end of the external chip; the first end of the first comparator 411 is connected to the second end of the eighth resistor R8 and the first end of the tenth resistor R10, and the second end of the first comparator 411 is connected to the driving unit 430.

[0106] It should be noted that when the AC power is off, through methods such as... Figure 6 The circuit shown is used to detect the load size. When AC power is off, the seventh MOSFET MN5 and the eighth MOSFET MN6 are turned off. Chip current flows from S1 through R1, out of the chip to the load LOAD, then into resistor R2, R4, and finally through MN2 to the common ground. The load size information for LOAD can be obtained by detecting the voltage divider at node S2. When the load resistance is too high, Vp voltage is less than Vn voltage, and the Load Detect output is low, at which point the emergency light is off. When the load resistance is too low, Vp voltage is higher than Vn voltage, and the Load Detect output is high, at which point the load has reached the threshold for turning on the emergency light.

[0107] The amplitude comparison unit 420 comprises an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a ninth MOS tube MN7, a tenth MOS tube MN8 and a second comparator 421; a first end of the eleventh resistor R11 is connected to the zero line, a second end of the eleventh resistor R11 is connected to a first end of the thirteenth resistor R13 and a first end of the second comparator 421; a first end of the twelfth resistor R12 is connected to the fire line, a second end of the twelfth resistor R12 is connected to a first end of the fourteenth resistor R14 and a second end of the second comparator 421; a second end of the thirteenth resistor R13 is connected to a drain of the ninth MOS tube MN7; a second end of the fourteenth resistor R14 is connected to a drain of the tenth MOS tube MN8; a gate of the ninth MOS tube MN7 is connected to a first end of the external chip, a source of the ninth MOS tube MN7 is connected to a source of the tenth MOS tube MN8; a gate of the tenth MOS tube MN8 is connected to a second end of the external chip; a third end of the second comparator 421 is connected to the driving unit 430.

[0108] It should be understood that when the AC is powered off, one of the ninth MOS tube MN7 and the tenth MOS tube MN8 is set to be in the closed state according to the port mixed connection, and the other is in the open state. By detecting the AC amplitude, when one of the zero fire line voltage is lower than the set threshold value, the AC Magnitude Detect signal is low, at this time it is judged that the AC power-off is effective, the restriction of the emergency lamp starting is released, and whether the emergency lamp is started is determined according to other conditions. When the Vp1 and Vp2 voltages are both higher than the threshold voltage Vref1, it is judged that the AC power-off is invalid, and the emergency lamp is turned off.

[0109] In the embodiment, the load information in the power grid, the AC power supply phase information and the AC power supply amplitude information are used as the enabling judgment signals of the emergency lamp. When the load impedance is less than a set threshold value, the AC power-on / off state is in the AC power-off state, and the AC amplitude is lower than a preset amplitude, the emergency lamp is started. It can be accurately applied to various use scenarios of the emergency lamp, and the stability of the emergency lamp lighting is ensured.

[0110] In addition, the application also provides an emergency lighting detection device, which comprises the emergency lighting detection circuit as described above. Since the emergency lighting detection device adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0111] In addition, in order to achieve the above object, the application further provides an emergency lamp, which comprises the emergency lighting detection circuit as described above.

[0112] The above are only some embodiments of the application, and do not limit the implementation scope of the application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the protection scope of the application.

Claims

1. An emergency lighting detection circuit, characterized by, The emergency lighting detection circuit comprises a sampling multiplexing module, a detection verification module, a logic control module and a comparison driving module; The sampling multiplexing module is connected with the AC network, the detection verification module, the logic control module and the comparison driving module; the detection verification module is further connected with the logic control module; and the logic control module is further connected with the comparison driving module; The sampling multiplexing module is configured to sample and transmit the initial AC signal in the AC network and the load impedance to the detection verification module and the comparison driving module after the switch is closed. The detection verification module is configured to detect the state of the current AC signal by comparing the initial AC signal with a reference threshold value, and detect the phase information of the zero line and the live line in the AC network to perform port verification on the external chip to obtain the AC amplitude after the external chip is powered off. The logic control module is configured to switch the AC power-on and power-off state of the external chip according to the current AC signal, and switch the connection relationship between the port of the external chip and the zero line and the live line in the AC network according to the AC amplitude. The comparison driving module is configured to start the emergency light when the load impedance is less than a set threshold value, the AC power-on and power-off state is in the AC power-off state, and the AC amplitude is lower than a preset amplitude.

2. The emergency lighting detection circuit of claim 1, wherein, The sampling multiplexing module comprises first to fourth resistors, a first MOS tube and a second MOS tube; The first end of the first resistor is connected with the zero line, and the second end of the first resistor is connected with the first end of the detection verification module and the first end of the third resistor; The first end of the second resistor is connected with the live line, and the second end of the second resistor is connected with the second end of the detection verification module and the first end of the fourth resistor; The second end of the third resistor is connected with the drain of the first MOS tube; The second end of the fourth resistor is connected with the drain of the second MOS tube; The gate of the first MOS tube is connected with the first end of the external chip, and the source of the first MOS tube is connected with the source of the second MOS tube; The gate of the second MOS tube is connected with the second end of the external chip.

3. The emergency lighting detection circuit of claim 1, wherein, The detection verification module comprises an AC detection unit and a port mixed connection verification unit; The first end of the AC detection unit is connected with the sampling multiplexing module, and the port mixed connection verification unit is connected with the second end of the AC detection unit and the logic control module; The AC detection unit is configured to detect the state of the current AC signal by comparing the initial AC signal with a reference threshold value; The port mixed connection verification unit is configured to detect the phase information of the zero line and the live line in the AC network, and perform port verification on the external chip to obtain the AC amplitude after the external chip is powered off.

4. The emergency lighting detection circuit of claim 3, wherein, The AC detection unit comprises third to sixth MOS tubes; The source of the third MOS tube is connected with the live line, the drain of the third MOS tube is connected with the first end of the logic control module, and the gate of the third MOS tube is connected with the first end of the sampling multiplexing module; The source of the fourth MOS tube is connected with the zero line, the drain of the fourth MOS tube is connected with the second end of the logic control module, and the gate of the fourth MOS tube is connected with the second end of the sampling multiplexing module; The drain of the fifth MOS tube is connected with the drain of the third MOS tube, the gate of the fifth MOS tube is connected with the first end of the sampling multiplexing module, and the source of the fifth MOS tube is connected with the source of the sixth MOS tube; The drain of the sixth MOS tube is connected with the drain of the fourth MOS tube, and the gate of the sixth MOS tube is connected with the second end of the sampling multiplexing module.

5. The emergency lighting detection circuit of claim 3, wherein, The port mixed connection verification unit comprises an information comparator, a latch, a flip-flop, a first double switch, a second double switch, a fifth resistor and a sixth resistor; The first end of the information comparator is connected with the second end of the sixth resistor, the first end of the first double switch and the second end of the second double switch, the second end of the information comparator is connected with the second end of the fifth resistor, the second end of the first double switch and the first end of the second double switch, and the third end of the information comparator is connected with the first end of the latch; The second end of the latch is connected with the first end of the flip-flop; The second end of the flip-flop is connected with the third end of the first double switch, the third end of the flip-flop is connected with the third end of the second double switch, and the fourth end of the flip-flop is connected with the third port of the external chip; The third end of the first double switch is also connected with the first end of the external chip, and the third end of the second double switch is also connected with the second end of the external chip; The first end of the fifth resistor is connected with one of the zero line and the live line, and the first end of the sixth resistor is connected with the other one of the zero line and the live line.

6. The emergency lighting detection circuit of claim 1, wherein, The comparison driving module comprises a load comparison unit, an amplitude comparison unit and a driving unit; The load comparison unit is connected with the third end of the sampling multiplexing module, and the amplitude comparison unit is connected with the third end of the sampling multiplexing module and the external chip; The load comparison unit is configured to compare the load impedance with the set threshold value; The amplitude comparison unit is configured to compare the AC amplitude with the preset amplitude; The driving unit is configured to start the emergency lamp when the load impedance is less than the set threshold value, the AC power-on and power-off state is in the AC power-off state, and the AC amplitude is lower than the preset amplitude.

7. The emergency lighting detection circuit as described in claim 6, characterized in that, The load comparison unit comprises seventh to tenth resistors, a seventh MOS tube, an eighth MOS tube and a first comparator; The first end of the seventh resistor is connected with the first end of the eighth resistor through the load impedance, and the second end of the seventh resistor is connected with the first end of the ninth resistor and the first end of the sampling multiplexing module; The second end of the eighth resistor is connected with the first end of the tenth resistor and the second end of the sampling multiplexing module; The second end of the ninth resistor is connected with the drain of the seventh MOS tube, and the second end of the tenth resistor is connected with the drain of the eighth MOS tube. The source of the seventh MOS is connected with the source of the eighth MOS; the gate of the seventh MOS is connected with the first end of the external chip; the gate of the eighth MOS is connected with the second end of the external chip; The first end of the first comparator is connected with the second end of the eighth resistance and the first end of the tenth resistance, and the second end of the first comparator is connected with the driving unit.

8. The emergency lighting detection circuit as described in claim 6, characterized in that, The amplitude comparison unit comprises eleventh to fourteenth resistances, a ninth MOS, a tenth MOS and a second comparator; The first end of the eleventh resistance is connected with the zero line, and the second end of the eleventh resistance is connected with the first end of the thirteenth resistance and the first end of the second comparator; The first end of the twelfth resistance is connected with the fire line, and the second end of the twelfth resistance is connected with the first end of the fourteenth resistance and the second end of the second comparator; The second end of the thirteenth resistance is connected with the drain of the ninth MOS; The second end of the fourteenth resistance is connected with the drain of the tenth MOS; The gate of the ninth MOS is connected with the first end of the external chip, and the source of the ninth MOS is connected with the source of the tenth MOS; The gate of the tenth MOS is connected with the second end of the external chip; The third end of the second comparator is connected with the driving unit.

9. An emergency lighting detection device, characterized in that The emergency lighting detection device comprises the emergency lighting detection circuit according to any one of claims 1 to 8.

10. An emergency light, characterized in that The emergency lamp comprises the emergency lighting detection circuit according to any one of claims 1 to 8.

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