Street lighting device and surge protection device thereof

Abstract

The present invention provides a street lamp device and a surge protection device thereof. The surge protection device includes an input voltage detector, a voltage converter, a power output circuit and a controller. The input voltage detector performs a voltage transformation and rectification operation on the input voltage to generate a detection voltage. The voltage converter receives the input voltage and performs a voltage conversion operation on the input voltage to generate a supply voltage. The power output circuit determines whether to provide the input voltage to drive the load based on a control signal. The controller receives the supply voltage as an operating power supply, determines the overvoltage or surge state of the input voltage based on the detection voltage, and generates a control signal based on the overvoltage or surge state to improve the reliability of the street lamp device.

Description

Technical Field

[0001] The present invention relates to a street lamp device and a surge protection device thereof, and in particular to a street lamp device capable of counting input voltage surge states and a surge protection device thereof. Background Art

[0002] With the advancement of electronic technology, the intelligence of street lighting installations has become an important feature of smart cities.

[0003] Since street lamps are installed in relatively complex working environments, the input voltage received by the street lamps often produces voltage anomalies due to environmental variations. For example, voltage surges caused by lightning strikes and overvoltages caused by unstable power supply. In response to these abnormal conditions, conventional technology uses surge absorption circuits to reduce the damage to street lamps caused by abnormal input voltages. However, these surge absorption circuits can only passively protect street lamps. Maintenance personnel can only perform maintenance operations after the street lamps fail. There is no active contribution to improving the availability of street lamps. Summary of the invention

[0004] The present invention is directed to a surge protection device and the surge protection device thereof, which can record the abnormal state of input voltage.

[0005] According to an embodiment of the present invention, a street lamp device includes a load having a plurality of light-emitting components and the surge protection device as described above.

[0006] Based on the above, the surge protection device of the present invention has a controller. The controller can analyze the abnormal state of the input voltage and record the overvoltage or surge state of the input voltage. The surge protection device provides the overvoltage or surge state as a basis for analysis, so that the manager can know the surge frequency in the area and carry out corresponding design and maintenance strategies to improve the availability of the street lamp device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the present invention and together with the description serve to explain the principles of the present invention.

[0008] Figure 1 A schematic diagram of a surge protection device according to an embodiment of the present invention;

[0009] Figure 2 is a schematic diagram of a power output circuit according to an embodiment of the present invention;

[0010] Figure 3 is a schematic diagram of an input voltage detector according to an embodiment of the present invention;

[0011] Figure 4 is a schematic diagram of a voltage converter according to an embodiment of the present invention;

[0012] Figure 5 is a schematic diagram of a controller according to an embodiment of the present invention;

[0013] Figure 6 , Figure 7 This is the action flow chart of the surge protection device;

[0014] Figure 8 is a schematic diagram of an implementation of an isolation circuit according to an embodiment of the present invention;

[0015] Fig. 9 is a schematic diagram of another implementation of an input voltage detector according to an embodiment of the present invention;

[0016] Fig.10 is a schematic diagram of a street lamp device according to an embodiment of the present invention;

[0017] Fig.11 is a block diagram of a street lamp device according to an embodiment of the present invention;

[0018] Fig.12 FIG. 4 is a schematic diagram of a street lamp device according to another embodiment of the present invention.

[0019] Description of Figure Numbers

[0020] 100: Surge protection device

[0021] 1000, 1100, 1200: street lighting installation;

[0022] 1010, 1110, 1210: load;

[0023] 1020, 1020', 1120, 1220, 1220': surge protection device;

[0024] 110: Input voltage detector;

[0025] 1130: communication interface;

[0026] 1140: Electronic devices;

[0027] 120: controller;

[0028] 1230: control node;

[0029] 1240: control box;

[0030] 130: voltage converter;

[0031] 140: power output circuit;

[0032] 241: Relay;

[0033] 300: input voltage detector;

[0034] 310: Rectifier;

[0035] 320: voltage divider circuit;

[0036] 410: AC to DC voltage converter;

[0037] 411: Rectifier;

[0038] 420: DC to DC voltage converter;

[0039] 510: controller;

[0040] 520: Memory;

[0041] 530: interface;

[0042] 810: Isolation circuit;

[0043] 900: overvoltage status signal generator;

[0044] 910: voltage divider circuit;

[0045] 920: amplifier circuit;

[0046] 930: analog-to-digital conversion circuit;

[0047] AV: amplified voltage;

[0048] C31, C32, CA1, C81, C82: capacitors;

[0049] DA1~DA3, DB1~DB2: diodes;

[0050] F1, F2: fuse;

[0051] G: ground terminal;

[0052] GND, GND1: reference ground terminal;

[0053] L, L1: live wire end;

[0054] LD1: light emitting diode;

[0055] Lout: FireWire output terminal;

[0056] N, N1: neutral line terminal;

[0057] Nout: neutral line output terminal;

[0058] OVP+, OVP-: overvoltage protection indication signal;

[0059] PD1: Optocoupler;

[0060] R31, RA1, RA2, RB1~RB3, R81, R82: resistors;

[0061] Ra, VA: detection voltage;

[0062] Ra1: detect voltage after voltage division;

[0063] Rb: control signal;

[0064] Rx, RXA: receive signal;

[0065] S610-S670, S710-S741: steps;

[0066] TA1: transistor;

[0067] TR1: Transformer;

[0068] Tx, TXA: transmit signal;

[0069] V1: voltage;

[0070] Vcc, VCC1, VCC: supply voltage;

[0071] VIN: input voltage;

[0072] VS1~VS3: voltage source;

[0073] ZD1: Kiner diode. DETAILED DESCRIPTION

[0074] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0075] Please refer to Figure 1 , Figure 1 A schematic diagram of a surge protection device according to an embodiment of the present invention is shown. The surge protection device 100 includes an input voltage detector 110, a voltage converter 130, a power output circuit 140, and a controller 120. The input voltage detector 110 is coupled to the live line terminal L1 and the neutral line terminal N1 to receive an input voltage VIN, and performs a voltage transformation and rectification operation on the input voltage VIN to generate a detection voltage Ra. The voltage converter 130 can be coupled to the live line terminal L1 and the neutral line terminal N, and thereby receive the input voltage VIN. The voltage converter 130 also performs a voltage conversion operation on the input voltage VIN to generate a supply voltage Vcc and a voltage V1. In the embodiment of the present invention, the level of the voltage V1 can be greater than the level of the supply voltage Vcc.

[0076] Since the input voltage VIN is an AC voltage, the voltage converter 130 can perform an AC-to-DC voltage conversion operation on the input voltage VIN and generate a DC voltage V1. On the other hand, the voltage converter 130 can perform a DC-to-DC voltage conversion operation on the voltage V1 and thereby generate a DC supply voltage Vcc. The DC-to-DC voltage conversion operation performed by the voltage converter 130 can be a step-down DC-to-DC voltage conversion operation, for example, based on a 24V voltage V1, to generate a 3.3V supply voltage Vcc.

[0077] In this embodiment, the live terminal L and the neutral terminal N can be the same endpoints as the live terminal L1 and the neutral terminal N1 respectively, or a fuse can be set between the live terminal L and the live terminal L1, and another fuse can be set between the neutral terminal N1 and the neutral terminal N.

[0078] On the other hand, the controller 120 is coupled to the input voltage detector 110 to receive the detection voltage Ra. The controller 120 is also coupled to the voltage converter 130 to receive the supply voltage Vcc, wherein the supply voltage Vcc is used as the operating power supply of the controller 120. The controller 120 determines an overvoltage or surge state of the input voltage VIN according to the detection voltage Ra, and generates a control signal Rb according to the overvoltage or surge state. The overvoltage or surge state indicates an overvoltage phenomenon or surge phenomenon occurring on the input voltage VIN.

[0079] In this embodiment, the power output circuit 140 is coupled to the voltage converter 130 and the controller 120. The power output circuit 140 receives the voltage V1 and the control signal Rb. The power output circuit 140 determines whether to provide the input voltage VIN to drive the load according to the control signal Rb. In this embodiment, the live output terminal Lout and the neutral output terminal Nout are used to couple to the load. The neutral output terminal Nout can be directly connected to the neutral terminal N, and the power output circuit 140 can determine whether to cut off or conduct the connection between the live output terminal Lout and the live terminal L according to the control signal Rb, wherein when the power output circuit 140 cuts off the connection between the live output terminal Lout and the live terminal L, the power output circuit 140 does not provide the input voltage VIN to drive the load, and conversely, when the power output circuit 140 conducts the connection between the live output terminal Lout and the live terminal L, the power output circuit 140 provides the input voltage VIN to drive the load.

[0080] It is worth mentioning that the controller 120 can determine the voltage abnormality state occurring on the input voltage VIN based on the detection voltage Ra. In the present embodiment, the controller 120 can know through the detection voltage Ra whether the reason for the voltage abnormality state occurring on the input voltage VIN is because of a voltage surge caused by, for example, a lightning strike, or the voltage generating source provides an overvoltage input voltage VIN. In detail, the controller 120 can know whether the voltage abnormality state occurs on the input voltage VIN based on the level of the detection voltage Ra. For example, the controller 120 can determine whether an overvoltage or surge state occurs on the input voltage VIN when the level of the detection voltage Ra is higher than a default value. In addition, the controller 120 can determine whether the voltage abnormality state on the input voltage VIN is an overvoltage state or a surge state by measuring the length of time that the level of the detection voltage Ra remains higher than the default value. The controller 120 can also generate a control signal Rb based on the state of an overvoltage or surge occurring on the input voltage VIN.

[0081] For example, when a lightning strike occurs, when the residual voltage of the input voltage reaches a peak voltage of 500 volts (or above), the controller 120 can detect that a surge state is generated on the input voltage VIN once according to the level rise and fall (once each) of the detection voltage Ra, and accumulate 1 for the first count. The accumulated first count is then written back to the memory.

[0082] The key point is that in this embodiment, in addition to determining whether the input voltage VIN has an overvoltage or surge state, the controller 120 also accumulates the number of times the input voltage VIN has an overvoltage or surge state. In detail, the controller 120 accumulates the first number of times the input voltage VIN has an overvoltage phenomenon, and the second number of times the surge phenomenon occurs, and stores the calculated first number and second number in the memory. Here, the memory can be a built-in memory of the controller 120, or a memory external to the controller 120, without specific restrictions. The memory can be any form of non-volatile memory that can be read and written, such as flash memory.

[0083] In addition, the controller 120 of the embodiment of the present invention can be connected to an external electronic device, and the recorded first number of overvoltage occurrences of the input voltage VIN and the second number of surge occurrences are transmitted to the external electronic device. In this way, the external electronic device can analyze the received data and learn the change state of the input voltage VIN in the area where the surge protection device 100 is located. The engineering staff can formulate relevant design strategies and maintenance plans based on the obtained change state.

[0084] Please refer to Figure 2 , Figure 2 A schematic diagram of a power output circuit according to an embodiment of the present invention is shown. Figure 2 In the embodiment, the power output circuit 240 is coupled to the surge absorption circuit 250. The surge absorption circuit 250 is coupled to the live terminal L, the neutral terminal N and the ground terminal G. The surge absorption circuit 250 receives the input voltage through the live terminal L and the neutral terminal N. The input voltage can be generated by the voltage sources VS1, VS2 and VS3. A fuse F1 is set between the voltage source VS1 and the live terminal L, and a fuse F2 is set between the voltage source VS3 and the neutral terminal N. In addition, the live terminal L is coupled to the anode of the diode DA1 through the fuse F1, and the cathode of the diode DA1 is coupled to another live terminal L1. The neutral terminal N is coupled to the anode of the diode DA2 through the fuse F2, and the cathode of the diode DA2 is coupled to another neutral terminal N1.

[0085] On the other hand, the power output circuit 240 includes a transistor TA1, resistors RA1, RA2, RB1-RB3, a capacitor CA1, a diode DA3, DB1, DB2, a light emitting diode LD1 and a relay 241. The resistors RA1, RA2 and the capacitor CA1 form a resistor-capacitor (RC) circuit and receive a control signal Rb. The control end of the transistor TA1 receives the output of the resistor-capacitor circuit, the first end of the transistor TA1 is coupled to the second input end of the relay 241, and the second end of the transistor TA1 is coupled to the reference ground end GND. The first input end of the relay 241 receives the voltage V1, and a reverse biased diode DA3 is provided between the first input end and the second input end of the relay 241.

[0086] On the other hand, the two ends of the switch of the relay 241 are respectively coupled to the live output terminal Lout and the live terminal L. When the switch of the relay 241 is turned on, the live output terminal Lout and the live terminal L are short-circuited with each other, and when the switch of the relay 241 is turned off, the live output terminal Lout and the live terminal L are disconnected with each other. When the level of the control signal Rb is high enough (for example, a logic high voltage), the transistor TA1 can be turned on, and the inductor of the relay 241 has a current, so that the switch of the relay 241 is turned on. On the contrary, when the level of the control signal Rb is relatively low (for example, a logic low voltage), the transistor TA1 can be turned off, and the inductor of the relay 241 has no current, so that the switch of the relay 241 is turned off.

[0087] Between the live output terminal Lout and the neutral output terminal Nout, a plurality of resistors RB1 to RB3, diodes DB1 and DB2, and a light-emitting diode LD1 are connected in series. When the live output terminal Lout and the live terminal L are short-circuited, the input voltage can be transmitted to the live output terminal Lout through the live terminal L, and the light-emitting diode LD1 is lit. Conversely, when the live output terminal Lout and the live terminal L are disconnected, the transmission path of the input voltage is cut off, and the light-emitting diode LD1 is not lit. It can be seen that the light-emitting diode LD1 can generate an indication signal of whether the input voltage is provided to the load.

[0088] Please refer to Figure 3 , Figure 3 A schematic diagram of an input voltage detector according to an embodiment of the present invention is shown. The input voltage detector 300 includes a transformer TR1, a rectifier 310, a capacitor C31, a resistor R31, a Zin diode ZD1, a capacitor C32, and a voltage divider circuit 320. The primary side of the transformer TR1 is coupled to the live line terminal L1 and the neutral line terminal N1, and receives the input voltage VIN. The rectifier 310 is coupled to the secondary side of the transformer TR1, and performs a rectification operation on the first voltage on the secondary side of the transformer TR1 to generate a second voltage. The resistor R31 and the capacitor C31 can be used as a filter circuit, and the Zin diode ZD1 and the capacitor C3 are coupled in parallel to each other and used as a voltage stabilizing circuit. The voltage divider circuit 320 divides the second voltage to generate a detection voltage Ra.

[0089] In this embodiment, the rectifier 310 may be a full-wave rectifier, or, in other embodiments of the present invention, the rectifier 310 may be a half-wave rectifier, without any particular limitation.

[0090] In addition, the number of resistors and the voltage division ratio included in the voltage division circuit 320 can be set according to the magnitude of the detection voltage Ra to be generated and the voltage generated by the rectifier 310 , and there is no fixed restriction.

[0091] Please refer to Figure 4 , Figure 4 A schematic diagram of a voltage converter according to an embodiment of the present invention is shown. The voltage converter 400 includes an AC-to-DC voltage converter 410 and a DC-to-DC voltage converter 420. The AC-to-DC voltage converter 410 is coupled to a live terminal L and a neutral terminal N, and receives an input voltage VIN. The AC-to-DC voltage converter 410 performs an AC-to-DC conversion operation on the AC input voltage VIN and generates a DC voltage V1.

[0092] The DC-DC voltage converter 420 receives the voltage V1, performs a DC-DC voltage conversion operation on the voltage V1, and generates a supply voltage Vcc. In this embodiment, the DC-DC voltage converter 420 may be a step-down DC-DC voltage conversion circuit, and the level of the generated supply voltage Vcc may be lower than the level of the voltage V1.

[0093] Please refer to the following Figure 5 , Figure 5 A schematic diagram of a controller of an embodiment of the present invention is shown. The controller 510 may be a processor with computing capabilities. Alternatively, the controller 510 may be designed using a hardware description language (HDL) or any other digital circuit design method known to those skilled in the art, and implemented as a hardware circuit using a field programmable gate array (FPGA), a complex programmable logic device (CPLD), or an application-specific integrated circuit (ASIC).

[0094] In addition, in the present embodiment, the controller 510 receives the detection voltage Ra, the supply voltage Vcc, and is coupled to the reference ground terminal GND. In addition, the controller 510 can generate a control signal Rb based on the detection voltage Ra. Among them, the controller 510 can receive the detection voltage Ra as an analog signal, and perform an analog-to-digital conversion operation on the detection voltage Ra to generate a detection voltage in a digital format. Taking 8 bits as an example, the detection voltage in a digital format generated by the controller 510 can be between 0 and 255. By comparing the detection voltage in a digital format with a default critical value, the controller 510 can determine whether the input voltage has an abnormal voltage phenomenon. Specifically, if the preset critical value is 100, the controller 510 can determine once that a voltage abnormality has occurred on the input voltage when the detection voltage in a digital format is greater than 100 and then drops to less than 100. In addition, the controller 510 can also count the detection voltage in digital format to maintain a first time length greater than 100. If the first time length is greater than another preset critical value, it indicates that the input voltage has an overvoltage state once. On the contrary, if the first time length is not greater than the above-mentioned other preset critical value, it indicates that the input voltage has a surge state once.

[0095] Of course, the above-mentioned critical value is set to 100 is just an example for illustration, and the above-mentioned other preset critical value can also be set by the designer without fixed restrictions.

[0096] In addition, in the present embodiment, the controller 510 is further coupled to the memory 520. The controller 510 can store the calculated first number of times the input voltage has an overvoltage state and the second number of times the input voltage has a surge state in the memory 520. In the embodiment of the present invention, the memory 520 can be a non-volatile memory. The controller 510 can obtain the previously stored first number and second number by reading the memory 520. Then, when a new overvoltage state occurs in the input voltage, the controller 510 can add 1 to the previous first number and write the updated first number back to the memory 520. Similarly, when a new surge voltage state occurs in the input voltage, the controller 510 can add 1 to the previous second number and write the updated second number back to the memory 520.

[0097] It is worth mentioning that the controller 510 is coupled to an interface 530. The interface 530 is used to connect the receiving signal Rx, the transmitting signal Tx, the supply voltage Vcc and the reference ground terminal GND. The controller 510 communicates with the external electronic device through the receiving signal Rx and the transmitting signal Tx. For example, the controller 510 receives a command sent by the external electronic device through the receiving signal Rx, and transmits the first number and the second number to the external electronic device through the transmitting signal Tx according to the command.

[0098] For the operation flow of the surge protection device according to the embodiment of the present invention, please refer to Figure 6 , Figure 7 The operation flow chart of the surge protection device is shown in FIG. Figure 6 In step S610, the controller can read the external memory and perform a read confirmation action in step S620. If step S620 confirms that the read action is completed, step S630 is executed. If step S620 confirms that the read action is not completed, step S621 can be executed to repeat the memory read action three times, and when the three read actions all indicate that the memory is not responsive, it is recorded in the system and step S640 is executed.

[0099] In step S630, the controller loads the previous record by reading the memory, that is, reading the first number of times the input voltage has an overvoltage state and the second number of times the input voltage has a surge state that are previously recorded in the memory. Then, in step S640, the controller can determine whether the input voltage has a surge state (voltage abnormality state) based on the detected voltage, and confirm through step S650 whether the surge state is an overvoltage state of the input voltage (steps S660, S670) or a surge state. If steps S660 and S670 determine and confirm that the input voltage has an overvoltage state, step S670 is executed to perform the overvoltage recording action so that the first number is accumulated by 1.

[0100] On the other hand, when it is confirmed in step S650 that the input voltage has a surge, step S651 performs a surge recording operation and adds the second number to 1. Finally, step S652 writes the updated first number and the second number to the external memory, and re-executes step S640 to detect the next voltage abnormality.

[0101] By the way, the external memory here can also be built into the controller and is not limited to being set outside the controller.

[0102] In addition, Figure 7 In step S710, the controller remains on standby, and then in step S720, the controller is awakened by the read record instruction thrown by the connected external electronic device (such as a computer and other related equipment). Then, in step S721, the controller receives the above instruction and verifies the correctness of the instruction. In step S722, the controller determines whether to perform the record reading action. If the judgment result is yes, the controller can read out the surge (second number) and overvoltage record (first number) recorded in the external memory through step S723, and transmit the surge (second number) and overvoltage record (first number) to the external electronic device (such as a computer and other related equipment) through step S724.

[0103] On the other hand, if the result of step S722 is no, it is determined whether the instruction sent by the external electronic device is to reset the first count and / or the second count to zero (step S731). If the result of step S731 is yes, step S741 is executed to erase the record in the external memory and reset it to zero. If the result of step S731 is no, step S732 is executed to reply to the external electronic device with a message indicating that the instruction failed.

[0104] Please refer to the following Figure 8 , Figure 8A schematic diagram of an implementation of an isolation circuit of an embodiment of the present invention is shown. In an embodiment of the present invention, a controller in a surge protection device can communicate with an external electronic device through an isolation circuit 810. The isolation circuit 810 can be an optical coupler. The isolation circuit 810 has a primary side to receive a supply voltage VCC as an operating power source and is coupled to a reference ground terminal GND. The primary side of the isolation circuit 810 transmits and receives a receiving signal Rx and a transmitting signal Tx of the controller through resistors R81 and R82, respectively. The isolation circuit 810 also has a secondary side to receive a supply voltage VCC1 as an operating power source and is coupled to a reference ground terminal GND1. The secondary side of the isolation circuit 810 has terminals to transmit and receive a receiving signal RXA and a transmitting signal TXA, respectively. In addition, a capacitor C81 is coupled between the supply voltage VCC and the corresponding reference ground terminal GND, and a capacitor C82 is coupled between the supply voltage VCC1 and the corresponding reference ground terminal GND1. Capacitors C81 and C82 are used as voltage stabilizing capacitors.

[0105] Please refer to Fig. 9 , Fig. 9 A schematic diagram illustrating another implementation of an input voltage detector according to an embodiment of the present invention is shown. Fig. 9 In the embodiment, the input voltage detector includes an overvoltage status signal generator 900. The overvoltage status signal generator 900 includes a voltage divider circuit 910, an amplifier circuit 920, an analog-to-digital conversion circuit 930, and an optical coupler PD1. The voltage divider circuit 910 receives a detection voltage Ra, divides the detection voltage Ra to generate another detection voltage VA and a divided detection voltage Ra1, and provides the divided detection voltage Ra1 to the amplifier circuit 920.

[0106] In this embodiment, the amplifier circuit 920 amplifies the difference between the detection voltage Ra1 and the reference voltage VREF after voltage division to generate an amplified voltage AV. The analog-to-digital conversion circuit 930 receives the amplified voltage AV and performs an analog-to-digital conversion operation on the amplified voltage AV to generate an overvoltage status signal VS in a digital format. The high or low logic value of the overvoltage status signal VS can be controlled by the voltage level of the detection voltage Ra. In other words, when the input voltage is abnormal, the voltage of the detection voltage Ra is relatively high, and the overvoltage status signal VS is a logic high level; when the input voltage is normal, the voltage of the detection voltage Ra is relatively low, and the overvoltage status signal VS is a logic low level.

[0107] On the other hand, in this embodiment, the overvoltage protection indication signals OVP+ and OVP- can be generated according to the overvoltage status signal VS through the optical coupler PD1. The voltage protection indication signals OVP+ and OVP- can be connected to the anode and cathode of a light-emitting diode respectively, and the overvoltage status signal is generated by lighting the light-emitting diode to indicate the input voltage.

[0108] In this embodiment, the overvoltage status signal generator 900 can provide the detection voltage Ra or VA to the controller 120, and provide the overvoltage status signal VS to the controller 120. The controller 120 can know whether the input voltage has an overvoltage or surge status according to the detection voltage Ra or VA, and know the duration of the overvoltage or surge status of the input voltage according to the overvoltage status signal VS, so as to know whether the input voltage has a surge status or an overvoltage status.

[0109] Please refer to Fig.10 , Fig.10 A schematic diagram of a street lamp device according to an embodiment of the present invention is shown. The street lamp device 1000 includes a load 1010 having a plurality of light-emitting components and a surge protection device 1020. The surge protection device 1020 can be disposed at any position in the street lamp device 1000, such as a position adjacent to the load 1010, or disposed at the bottom position of the lamp post of the street lamp device 1000 (e.g., surge protection device 1020'). The implementation details of the surge protection device 1020 can be found in the aforementioned multiple embodiments, and will not be described in detail here.

[0110] Please note that in the embodiment of the present invention, the surge protection device 1020 is detachably connected to the load 1010. When the surge protection device 1020 is connected to the load 1010, it can detect the overvoltage or surge state of the input voltage of the street lamp device 1000 and record it. When the overvoltage or surge state of the input voltage of the street lamp device 1000 is to be read, the surge protection device 1020 can be separated from the load 1010 and the surge protection device 1020 can be electrically connected to an external electronic device (such as a computer) to read the overvoltage or surge state and use it as a basis for analysis.

[0111] On the other hand, when reading the overvoltage or surge state, the surge protection device 1020 and the load 1010 may not need to be separated. The surge protection device 1020 and the external electronic device may be connected to each other via a connection line, so that the external electronic device can send instructions to the surge protection device 1020, and the surge protection device 1020 transmits the recorded overvoltage or surge state to the external electronic device.

[0112] Alternatively, a communication interface may be provided on the street lamp device 1000. The surge protection device 1010 is coupled to the communication interface, and transmits the overvoltage or surge state of the input voltage to the external electronic device through the communication interface in a wireless or wired communication manner. For example, the surge protection device 1010 may be connected to the Internet (or any other type of network) through the communication interface to perform authentication and connection with the external electronic device, and transmit the overvoltage or surge state to the external electronic device through the network.

[0113] Please refer to Fig.11 , Fig.11 The block diagram of the street light device according to the embodiment of the present invention is shown. The street light device 1100 includes a surge protection device 1110, a load 1120 and a communication interface 1130. The surge protection device 1110 is coupled to the load 1120 and the communication interface 1130. The communication interface 1130 can communicate with the electronic device 1140 via wired or wireless means.

[0114] In this embodiment, the surge protection device 1110 receives the input voltage VIN, detects the abnormal voltage state of the input voltage VIN, and can determine whether to provide the input voltage VIN to drive the load 1120 (light emitting component) based on the detection result. In addition, the surge protection device 1110 also records the overvoltage or surge state of the input voltage VIN, and transmits the overvoltage or surge state to the electronic device 1140 according to the needs of the electronic device 1140.

[0115] Please refer to Fig.12 , Fig.12 A schematic diagram of a street lamp device according to another embodiment of the present invention is shown. The street lamp device 1200 includes a load 1210 having a plurality of light-emitting components and a surge protection device 1220. The surge protection device 1220 can be disposed at any position in the street lamp device 1200, such as a position adjacent to the load 1210, or disposed at the bottom position of the lamp post of the street lamp device 1200 (such as a surge protection device 1220').

[0116] On the other hand, the street lamp device 1200 has a control node 1230. A communication interface may be provided in the control node 1230. The surge protection device 1220 is coupled to the control node 1230 and communicates with an external electronic device through the communication interface on the control node 1230. In addition, in an embodiment of the present invention, a control box 1240 may be provided on the street lamp device 1200. The control box 1240 may be mounted on any part of the street lamp device 1200 body. In addition, the surge protection device 1220 may be provided in the control box 1240 and electrically connected to the load 1210 and the control node 1230 through the wires in the street lamp device 1200.

[0117] In summary, the surge protection device of the present invention performs voltage transformation and rectification on the input voltage to generate a detection voltage, and determines an overvoltage or surge state of the input voltage based on the detection voltage, and accumulates and records the number of occurrences of the overvoltage or surge state. The surge protection device can provide the accumulated number of overvoltage or surge states obtained to an external electronic device, so that the external electronic device can analyze the abnormal state of the input voltage in the area, so as to more effectively set a suitable maintenance strategy for the street lamp device in a specific area, or select a more suitable component specification to improve the availability of the street lamp device.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A surge protection device, characterized in that: include: An input voltage detector performs voltage transformation and rectification on the input voltage to generate a detection voltage; A voltage converter receives the input voltage and performs a voltage conversion operation on the input voltage to generate a supply voltage; A power output circuit is coupled to the load and determines whether to provide the input voltage to drive the load according to a control signal; as well as A controller is coupled to the input voltage detector, the voltage converter and the power output circuit. The controller receives the supply voltage as an operating power supply, determines an overvoltage or surge state of the input voltage according to a length of time that the detection voltage is maintained greater than a preset critical value, generates the control signal according to the overvoltage or surge state, and accumulates the number of times the input voltage has the overvoltage or surge state. The overvoltage or surge state indicates that an overvoltage or surge phenomenon occurs on the input voltage. The voltage converter comprises: an AC-to-DC voltage converter, receiving the input voltage, and performing an AC-to-DC voltage conversion operation on the input voltage to generate a reference DC voltage; as well as The DC-to-DC voltage converter performs a DC-to-DC voltage conversion operation on the reference DC voltage to generate the supply voltage.

2. The surge protection device according to claim 1, wherein the input voltage detector comprises: A transformer, for transforming the input voltage and generating a first voltage; a rectifier, coupled to the transformer, for rectifying the first voltage to generate a second voltage; as well as The first voltage-dividing circuit is coupled to the rectifier and divides the second voltage to generate the detection voltage.

3. The surge protection device according to claim 2, wherein the input voltage detector further comprises: The overvoltage status signal generator is coupled to the first voltage divider circuit and generates an overvoltage status signal by comparing the detection voltage with a reference voltage. 4 . The surge protection device according to claim 3 , wherein the controller further receives the overvoltage status signal, and determines the overvoltage or surge status of the input voltage according to the overvoltage status signal and the detection voltage.

5. The surge protection device according to claim 3, wherein the overvoltage status signal generator comprises: A second voltage dividing circuit divides the detection voltage to generate a divided detection voltage; an amplifier circuit, receiving the divided detection voltage and the reference voltage, and amplifying the difference between the divided detection voltage and the reference voltage to generate an amplified voltage; as well as The analog-to-digital conversion circuit receives the amplified voltage and generates the overvoltage status signal in a digital format according to the amplified voltage. 6 . The surge protection device according to claim 1 , wherein the controller calculates a first number of times that overvoltage occurs in the input voltage and a second number of times that surge occurs in the input voltage according to the overvoltage or surge state. 7 . The surge protection device according to claim 6 , wherein the controller is further configured to be connected to an external electronic device and transmit the first number and the second number to the external electronic device. 8 . The surge protection device according to claim 7 , further comprising an isolation circuit, wherein the controller is connected to the external electronic device through the isolation circuit. 9 . The surge protection device according to claim 7 , wherein the controller has a memory for recording the first number and the second number. 10 . The surge protection device according to claim 1 , wherein the AC-to-DC voltage converter performs rectification and filtering operations on the input voltage to generate the DC voltage. 11 . The surge protection device according to claim 1 , wherein the DC-to-DC voltage converter performs a step-down DC-to-DC voltage conversion operation on the reference DC voltage to generate the supply voltage.

12. The surge protection device according to claim 1, wherein the power output circuit comprises: A transistor having a control terminal for receiving the control signal and a second terminal coupled to a reference ground terminal; as well as a relay having a first input terminal receiving a reference DC voltage and a second input terminal coupled to the first terminal of the transistor, The relay is coupled to a power supply path for the load to receive the input voltage, and is used to switch on or off the power supply path.

13. A street lamp device, comprising: A load, including a plurality of light-emitting components; as well as The surge protection device as claimed in claim 1, connected to the load.

14. The street lamp device according to claim 13, wherein the surge protection device is detachably connected to the load, and when the surge protection device is separated from the load, is used to connect to an external electronic device and transmit a first number of overvoltage occurrences of the input voltage and a second number of surge occurrences of the input voltage to the external electronic device.

15. The street lamp device according to claim 13, further comprising: A communication interface is coupled to the surge protection device via a wired or wireless method. The surge protection device transmits information with an external electronic device via the communication interface.

16. The street light device according to claim 15, further comprising: A control box is arranged on the main body of the street lamp device. The communication interface is arranged in a control box, and the surge protection device and the communication interface are arranged together in the control box or adjacent to the load.

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