Tower Obstruction Light Power Supply Circuit and System

Abstract

The present invention proposes a power supply circuit and system for an iron tower obstacle light, which relates to the technical field of power supply for obstacle lights, and includes a battery pack, a centralized control unit, a load power supply control circuit and a solar charging control circuit. The load power supply control circuit is respectively connected to the battery pack and the centralized control unit, so that under the control of the centralized control unit, the power of the battery pack is output to power the load; the solar charging control circuit is respectively connected to the battery pack and the centralized control unit, so that under the control of the centralized control unit, the power output of the solar charging panel is used to charge the battery pack. In this way, the battery pack can be charged through the solar panel, and the iron tower obstacle light can be powered by the battery pack, which reduces the trouble of wiring power lines and makes the installation of the iron tower obstacle light more convenient; in addition, it is relatively safe to output low-voltage power supply through the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply for obstacle lights, and in particular to a power supply circuit and system for an obstacle light on an iron tower. Background Art

[0002] With the increase of domestic high-voltage transmission lines, the increasing number of power towers has gradually become one of the factors affecting aviation safety. According to the requirements of the Civil Aviation Administration, aviation obstruction lights and related signs should be installed in the airport clear area or other tall buildings and structures that may affect flight safety as a warning. The role of aviation obstruction lights is to show the outline of the structure, so that aircraft operators can accurately judge the height and outline of the obstacle, which plays a warning role.

[0003] In the prior art, the power supply of the tower obstruction light is usually taken from the AC power of the mains. This requires wiring according to the specific location of the tower obstruction light, which is relatively troublesome and inconvenient to install the tower obstruction light on the tower. In addition, the output voltage of the power supply in the prior art is relatively high, which is relatively dangerous. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology, and then propose a power supply circuit and system for an iron tower obstacle light.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] The power supply circuit of the iron tower obstacle light includes:

[0007] Battery pack;

[0008] The controller includes: a centralized control unit, a load power supply control circuit and a solar charging control circuit. The load power supply control circuit is connected to the battery pack and the centralized control unit respectively, so that under the control of the centralized control unit, the power of the battery pack is output to power the load; the solar charging control circuit is connected to the battery pack and the centralized control unit respectively, so that under the control of the centralized control unit, the power output of the solar charging panel is used to charge the battery pack.

[0009] Further, according to an embodiment of the present invention, the controller further includes:

[0010] Power interface, which is used to electrically connect to the load and the solar charging panel;

[0011] The front-end protection circuit, the load power supply control circuit and the solar charging control circuit are respectively connected to the power interface through the front-end protection circuit. The front-end protection circuit is used to perform abnormal protection on the signal of the power interface.

[0012] Further, according to an embodiment of the present invention, the controller further includes:

[0013] A load current detection circuit, the load current detection circuit is connected to the load power supply control circuit and the centralized control unit respectively, and the centralized control unit performs current detection on the load power supply through the load current detection circuit;

[0014] The charging current detection circuit is connected to the solar charging control circuit and the centralized control unit respectively. The centralized control unit detects the charging current of the battery pack through the charging current detection circuit.

[0015] Further, according to an embodiment of the present invention, the controller further includes:

[0016] A battery voltage detection circuit, the battery voltage detection circuit is connected to the battery pack and the centralized control unit respectively, and the centralized control unit detects the power supply voltage of the battery pack through the battery voltage detection circuit;

[0017] The charging voltage detection circuit is connected to the battery pack and the centralized control unit respectively. The centralized control unit detects the charging voltage of the battery pack through the charging voltage detection circuit.

[0018] Further, according to an embodiment of the present invention, the controller further includes:

[0019] The temperature detection circuit is connected to the centralized control unit, and the centralized control unit detects the temperature of the battery pack through the temperature detection circuit.

[0020] Further, according to an embodiment of the present invention, the load power supply control circuit includes:

[0021] A first MOS tube driver, wherein a control signal input terminal of the first MOS tube driver is connected to a load power supply control signal output terminal of the centralized control unit;

[0022] A first MOS tube (Q81), a gate of the first MOS tube (Q81) is connected to a driving signal output end of a first MOS tube driver through a first resistor (R82), the gate of the first MOS tube (Q81) is also connected to one end of a second resistor (R85) through the first resistor (R82), the other end of the second resistor (R85) is connected to a source of the first MOS tube (Q81), the first MOS tube (Q81) is also connected to a power supply output end of a battery pack, and the first MOS tube (Q81) outputs a control power supply of the battery pack through a drain to supply power to a load.

[0023] Further, according to an embodiment of the present invention, the solar charging control circuit includes:

[0024] A second MOS tube driver, wherein a control signal input terminal of the second MOS tube driver is connected to a first charging control signal output terminal of the centralized control unit;

[0025] a second MOS tube (Q92), wherein a gate of the second MOS tube (Q92) is connected to a driving signal output terminal of a second MOS tube driver through a third resistor (R92), and a source of the second MOS tube (Q92) is connected to a charging input terminal of a battery pack;

[0026] A photoelectric coupler, wherein an anode of a light emitting diode of the photoelectric coupler is connected to a second charging control signal output terminal of the centralized control unit, a cathode of the light emitting diode of the photoelectric coupler is connected to a first reference ground (GND), and a collector of a phototransistor of the photoelectric coupler is connected to a power supply;

[0027] A third MOS tube (QA1), a gate of the third MOS tube (QA1) is connected to the emitter of the photoelectric coupler through a fourth resistor (RA4), a drain of the third MOS tube (QA1) is connected to the drain of the second MOS tube (Q92), and a source of the third MOS tube (QA1) is connected to the power output end of the solar charging panel.

[0028] Further, according to an embodiment of the present invention, the front-end protection circuit includes:

[0029] A first varistor (MOV1), one end of the first varistor (MOV1) is connected to a second reference ground (G-GND);

[0030] A fuse (F0), one end of the fuse (F0) is connected to the other end of the first varistor (MOV1), and the other end of the fuse (F0) is connected to the positive power output end of the solar charging panel; the one end of the fuse (F0) is also connected to the positive end of the battery pack and the positive end of the load;

[0031] A second varistor (MOV3), one end of the second varistor (MOV3) is connected to the other end of the first varistor (MOV1), and the other end of the second varistor (MOV3) is connected to the negative power output end of the solar charging panel;

[0032] A third varistor (MOV2), one end of the third varistor (MOV2) is connected to the negative power output end of the solar charging panel, and the other end of the third varistor (MOV2) is connected to the second reference ground (G-GND);

[0033] A first capacitor (CX1), one end of the first capacitor (CX1) is connected to the other end of the first varistor (MOV1), and the other end of the first capacitor (CX1) is connected to the negative power output end of the solar charging panel;

[0034] A second capacitor (CY1), one end of the second capacitor (CY1) is connected to the other end of the first capacitor (CX1), and the other end of the second capacitor (CY1) is connected to a second reference ground (G-GND);

[0035] a third capacitor (CY3), one end of the third capacitor (CY3) being connected to the other end of the first varistor (MOV1), and the other end of the third capacitor (CY3) being connected to the second reference ground (G-GND);

[0036] a fourth varistor (MOV4), one end of the fourth varistor (MOV4) is connected to the positive end of the battery pack, and a negative end of the fourth varistor (MOV4) is connected to the negative end of the battery pack;

[0037] A fifth varistor (MOV5), one end of the fifth varistor (MOV5) is connected to the negative end of the battery pack, and the other end of the fifth varistor (MOV5) is connected to the second reference ground (G-GND).

[0038] Further, according to an embodiment of the present invention, the load current detection circuit includes:

[0039] A current detection resistor (RL1) is connected in series to a power supply circuit of the load;

[0040] An integrated operational amplifier (U11A), wherein a non-phase input terminal of the integrated operational amplifier (U11A) is connected to a sampling current output terminal of a current detection resistor (RL1) through a resistor R11, an inverting input terminal of the integrated operational amplifier (U11A) is connected to a negative terminal of a battery pack through a fifth resistor (R15), an inverting input terminal of the integrated operational amplifier (U11A) is connected to an output terminal of the integrated operational amplifier (U11A) through a sixth resistor (R12), a seventh resistor (R13) and an eighth resistor (R14) connected in series, and an output terminal of the integrated operational amplifier (U11A) is connected to a load current signal sampling terminal of a centralized control unit.

[0041] On the other hand, an embodiment of the present invention also provides an iron tower obstacle light system, including:

[0042] A battery box, wherein the power supply circuit for the iron tower obstacle light according to any one of claims 1 to 9 is arranged in the battery box;

[0043] A battery pack, wherein the battery pack is arranged in the battery box;

[0044] Solar panels, the solar panels are connected with the battery box.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The iron tower obstacle light power supply circuit provided in the embodiment of the present invention is respectively connected to the battery pack and the centralized control unit through the load power supply control circuit, so that under the control of the centralized control unit, the power of the battery pack is output to power the load; the solar charging control circuit is respectively connected to the battery pack and the centralized control unit, so that under the control of the centralized control unit, the power output of the solar charging panel is used to charge the battery pack. In this way, the battery pack can be charged through the solar panel, and the iron tower obstacle light can be powered by the battery pack, which reduces the trouble of power line wiring and makes the installation of the iron tower obstacle light more convenient; in addition, it is relatively safe to output low-voltage power supply through the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 The structural block diagram of the power supply circuit for the tower obstacle light;

[0048] Figure 2 It is a schematic diagram of the circuit structure of the single-chip microcomputer centralized control unit;

[0049] Figure 3A Schematic diagram of the load power supply control circuit structure;

[0050] Figure 3B This is a schematic diagram of the solar charging control circuit structure;

[0051] Figure 4 A schematic diagram of the circuit structure of the power supply circuit for the iron tower obstacle light;

[0052] Figure 5 It is a schematic diagram of the front-end protection circuit structure;

[0053] Figure 6 It is a schematic diagram of the structure of the load current detection circuit;

[0054] Figure 7 Schematic diagram of the charging current detection circuit structure;

[0055] Figure 8 It is a schematic diagram of the charging voltage detection circuit structure;

[0056] Fig. 9 It is a schematic diagram of the battery voltage detection circuit structure;

[0057] Fig.10 It is a schematic diagram of the temperature detection circuit structure;

[0058] Fig.11 This is a schematic diagram of the structure of the tower obstacle light system; DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention is further described in combination with the drawings and embodiments:

[0060] On the one hand, see Figure 1 As shown in Figure 3, an embodiment of the present invention provides a power supply circuit for an iron tower obstacle light, including: a lead-acid battery pack and a controller, the controller including a centralized control unit, a load power supply control circuit and a solar charging control circuit, the load power supply control circuit is respectively connected to the lead-acid battery pack and the centralized control unit, so that under the control of the centralized control unit, the power output of the lead-acid battery pack is used to power the load; the solar charging control circuit is respectively connected to the lead-acid battery pack and the centralized control unit, so that under the control of the centralized control unit, the solar charging panel and the wind charging panel output power to charge the lead-acid battery pack.

[0061] like Figure 1 As shown in , the load power supply control circuit and the solar charging control circuit can be controlled by the centralized control unit. When the lead-acid battery pack needs to be charged, the centralized control unit can output a control signal to the solar charging control circuit, so that the power output by the solar panel can be controlled to be output to the lead-acid battery pack, so as to charge the lead-acid battery pack. When the lead-acid battery pack is fully charged, the centralized control unit can output a control signal to control the solar charging control circuit to stop charging. Since the iron tower obstacle light power supply circuit provided by the embodiment of the present invention is applied to outdoor environments. Therefore, it is convenient to collect solar energy and wind energy through solar panels to charge the lead-acid battery pack. Similarly, when it is necessary to power the navigation light through the lead-acid battery pack, the centralized control unit can output the power of the lead-acid battery pack to power the navigation light by outputting a control signal to the load power supply control circuit. The power supply requirements of the navigation light in the iron tower environment are met. Among them, the lead-acid battery is better for powering the load due to its reliability and low cost. Among them, the centralized control unit can be a single-chip microcomputer controller, a logic matrix controller FPGA, a digital processor DSP, etc.

[0062] See also Figure 2 and Figure 3AThe load power supply control circuit includes: a first MOS tube driver U81 and a first MOS tube Q81, wherein the control signal input end of the first MOS tube driver is connected to the load power supply control signal output end of the centralized control unit; the gate of the first MOS tube Q81 is connected to the drive signal output end of the first MOS tube driver through a first resistor R82, the gate of the first MOS tube Q81 is also connected to one end of a second resistor R85 through the first resistor R82, the other end of the second resistor R85 is connected to the source of the first MOS tube Q81, the first MOS tube Q81 is also connected to the power supply output end of the lead-acid battery pack, and the first MOS tube Q81 outputs the control power of the lead-acid battery pack through a drain to power the load.

[0063] like Figure 2 and Figure 3A As shown in , the working process of the load power supply control circuit is that when the centralized control unit U41 determines that it is necessary to output the power supply to supply power to the load, a control signal can be output through the Load_C signal terminal, and the control signal is converted into a drive signal of the first MOS tube Q81 through the first MOS tube driver U81 to drive the first MOS tube Q81 to turn on, thereby connecting the power supply circuit of the load, and then outputting the power of the lead-acid battery pack through the power supply terminal L- to supply power to the load. When it is necessary to disconnect the load power supply, a drive signal can be output through the first MOS tube driver U81 to make the first MOS tube driver U81 cut off, thereby disconnecting the load power supply. In some embodiments, in order to meet the current of the load, multiple MOS tubes can be connected in parallel at the same time; as Figure 3A The first MOS transistor Q81, MOS transistor Q82 and MOS transistor Q83 in the circuit are connected. The first MOS transistor driver U81 is used to simultaneously control the conduction or cut-off of multiple parallel MOS transistors.

[0064] See also Figure 2 and Figure 3BThe solar charging control circuit includes: a second MOS tube driver, a second MOS tube Q92, a photocoupler and a third MOS tube QA1, wherein the control signal input terminal of the second MOS tube driver is connected to the first charging control signal output terminal of the centralized control unit; the gate of the second MOS tube Q92 is connected to the driving signal output terminal of the second MOS tube driver through a third resistor R92, and the source of the second MOS tube Q92 is connected to the charging input terminal of the lead-acid battery pack; the anode of the light emitting diode terminal of the photocoupler is connected to the second charging control signal output terminal of the centralized control unit, the cathode of the light emitting diode terminal of the photocoupler is connected to the first reference ground GND, and the collector of the photosensitive transistor terminal of the photocoupler is connected to the power supply; the gate of the third MOS tube QA1 is connected to the emitter of the photocoupler through a fourth resistor RA4, the drain of the third MOS tube QA1 is connected to the drain of the second MOS tube Q92, and the source of the third MOS tube QA1 is connected to the power output terminal of the solar charging panel.

[0065] like Figure 2 and Figure 3B As shown in , the working process of the solar charging control circuit is that when the centralized control unit U41 determines that the lead-acid battery pack needs to be charged, a control signal can be output to the second MOS tube driver U91 through the signal end Solar_Charge signal end, and the control signal is converted into a driving signal of the second MOS tube Q92 through the second MOS tube driver U91 to drive the second MOS tube Q92 to turn on; at the same time, the centralized control unit U41 also outputs a high-level signal to the light-emitting diode end of the photoelectric coupler UA1 through the Solar_chargePWM signal end, thereby driving the light-emitting diode of the photoelectric coupler UA1 to emit light, and turning on the photosensitive transistor end of the photoelectric coupler UA1, outputting a driving signal to the third MOS tube QA1, and then turning on the third MOS tube QA1. When the second MOS tube Q92 and the third MOS tube QA1 are both turned on, the solar panel output power can charge the lead-acid battery pack through the second MOS tube Q92 and the third MOS tube QA1. When the lead-acid battery pack is fully charged, the second MOS tube Q92 and the third MOS tube QA1 can be driven to turn off by outputting a control signal. In some embodiments, in order to meet the current of the lead-acid battery pack, multiple groups of MOS tubes can be connected in parallel at the same time; Figure 3BThe second MOS transistor Q92 and the third MOS transistor QA1 are a group, the MOS transistor Q91 and the MOS transistor QA2 are another group, and the MOS transistor Q93 and the MOS transistor QA3 are another group. The second MOS transistor driver U91 is used to simultaneously control the on or off of multiple parallel MOS transistors. The photoelectric coupler UA1 is used to simultaneously control the on or off of multiple parallel MOS transistors.

[0066] See also Figure 1 , Figure 4 and Figure 5 , the controller also includes: a power interface and a front-end protection circuit, the power interface is used to be electrically connected to the load and the solar charging panel; the load power supply control circuit and the solar charging control circuit are respectively connected to the power interface through the front-end protection circuit, and the front-end protection circuit is used to perform abnormal protection on the signal of the power interface. Since the working environment of the iron tower obstacle light power supply circuit is to power outdoor iron tower obstacle lights. Because the outdoor environment is relatively complex. Especially in thunderstorm environments, lightning signals usually cause short circuits, open circuits, and other faults in the iron tower obstacle light power supply circuit. Therefore, abnormal protection is required at the power interface. To ensure that the back-end circuit of the iron tower obstacle light power supply circuit is not damaged by abnormal signals.

[0067] like Figure 4 As shown in , the power interface P0 may include multiple signal connection terminals. For example, the solar panel is connected to PV+ and PV-, the lead-acid battery is connected to terminals B+ and B-, and the load is connected to terminals L+ and L-2. In this way, the solar panel, the lead-acid battery, the obstacle light load, etc. can be connected respectively through the power interface P0.

[0068] like Figure 5As shown in, the front-end protection circuit includes: a first varistor MOV1, a fuse F0, a second varistor MOV3, a third varistor MOV2, a first capacitor CX1, a second capacitor CY1, a third capacitor CY3, a fourth varistor MOV4 and a fifth varistor MOV5, one end of the first varistor MOV1 is connected to the second reference ground G-GND; one end of the fuse F0 is connected to the other end of the first varistor MOV1, and the other end of the fuse F0 is connected to the positive power output end of the solar charging panel; the one end of the fuse F0 is also connected to the positive end of the lead-acid battery pack and the positive end of the load; one end of the second varistor MOV3 is connected to the other end of the first varistor MOV1, and the other end of the second varistor MOV3 is connected to the negative power output end of the solar charging panel; one end of the third varistor MOV2 is connected to the negative power output end of the solar charging panel, The other end of the third varistor MOV2 is connected to the second reference ground G-GND; one end of the first capacitor CX1 is connected to the other end of the first varistor MOV1, and the other end of the first capacitor CX1 is connected to the negative power output end of the solar charging panel; one end of the second capacitor CY1 is connected to the other end of the first capacitor CX1, and the other end of the second capacitor CY1 is connected to the second reference ground G-GND; one end of the third capacitor CY3 is connected to the other end of the first varistor MOV1, and the other end of the third capacitor CY3 is connected to the second reference ground G-GND; one end of the fourth varistor MOV4 is connected to the positive end of the lead-acid battery pack, and the negative end of the fourth varistor MOV4 is connected to the negative end of the lead-acid battery pack; one end of the fifth varistor MOV5 is connected to the negative end of the lead-acid battery pack, and the other end of the fifth varistor MOV5 is connected to the second reference ground G-GND.

[0069] The working process of the front-end protection circuit is that the current at the solar panel interface end can be limited by the fuse F0. When the current at the solar panel interface end is greater than the maximum current of the fuse, the fuse will blow, thereby performing overcurrent protection. The first varistor MOV1, the second varistor MOV3, and the third varistor MOV2 constitute an overvoltage protection circuit. When the voltage introduced by the solar panel interface end PV+, PV-, battery interface B+ or load interface is too high, the first varistor MOV1, the second varistor MOV3, and the third varistor MOV2 can be in a short-circuit state, thereby directly introducing the high-voltage signal into the second reference ground G-GND, thereby preventing the high-voltage signal from entering the back-end circuit of the tower obstacle light power supply circuit. The first capacitor CX1, the second capacitor CY1, and the third capacitor CY3 can absorb the pulse higher than the signal introduced by the solar panel interface PV+, PV-, the battery interface B+ or the load interface to protect the back-end circuit. Similarly, the fourth varistor MOV4 and the fifth varistor MOV5 can directly introduce the high-voltage signal introduced by the battery interface into the second reference ground G-GND to prevent the high-voltage signal from entering the back-end circuit of the tower obstacle light power supply circuit. In addition, the load interface end L+ can also include varistor MOV6, fuse F5, fuse F6, varistor MOV7, varistor MOV8, capacitor CX2, third capacitor CY3, etc. Its circuit structure and function are basically the same as the above-mentioned first varistor MOV1, fuse F0, second varistor MOV3, third varistor MOV2, first capacitor CX1, and second capacitor CY1. For the sake of brevity, it will not be repeated again.

[0070] See also Figure 1 , Figure 3A , Figure 3B , Figure 6 and Figure 7 , the controller also includes: a load current detection circuit and a charging current detection circuit, the load current detection circuit is connected to the load power supply control circuit and the centralized control unit respectively, the centralized control unit is used to detect the current of the load power supply through the load current detection circuit; the charging current detection circuit is connected to the solar charging control circuit and the centralized control unit respectively, the centralized control unit is used to detect the current of the lead-acid battery pack through the charging current detection circuit. By performing current detection on the load power supply, the current size of the power supply can be obtained, and the discharge abnormality protection control of the lead-acid battery pack can be performed. Similarly, by performing current detection on the charging power supply of the lead-acid battery pack, the current size of the charging power supply can be obtained, and the charging abnormality protection control of the lead-acid battery pack can be performed.

[0071] like Figure 3A and Figure 6As shown in, the load current detection circuit includes: a current detection resistor RL1 and an integrated operational amplifier U11A, the current detection resistor RL1 is connected in series to the power supply circuit of the load; the non-phase input terminal of the integrated operational amplifier U11A is connected to the sampling current output terminal of the current detection resistor RL1 through a resistor R11, the inverting input terminal of the integrated operational amplifier U11A is connected to the negative terminal of the lead-acid battery pack through a fifth resistor R15, the inverting input terminal of the integrated operational amplifier U11A is connected to the output terminal of the integrated operational amplifier U11A through a sixth resistor R12, a seventh resistor R13 and an eighth resistor R14 connected in series, and the output terminal of the integrated operational amplifier U11A is connected to the load current signal sampling terminal of the centralized control unit.

[0072] like Figure 6 As shown in , the working process of the load current detection circuit is as follows: Figure 3A As shown in , the current on the power supply circuit of the load can be collected through the current detection resistor RL1. And output to the positive input terminal of the integrated operational amplifier U11A. The integrated operational amplifier U11A constitutes an operational amplifier circuit, which can collect the signal from the current detection resistor RL1 for operational amplification and isolation, and then output it to the load current signal sampling terminal LI-ADC of the centralized control unit U41. In this way, the centralized control unit U41 can obtain the current size of the load, so as to perform abnormal protection such as overcurrent. As shown in Figure 7 As shown in , the charging current detection circuit includes an integrated operational amplifier U21A, and the integrated operational amplifier U21A also constitutes a signal isolation amplifier circuit. As shown in FIG3 , the charging current of the lead-acid battery pack can be collected through parallel resistors RS1, RS2, RS3 and RS4, and output to the integrated operational amplifier U21A for signal isolation and amplification, and then output to the charging current signal sampling end of the centralized control unit U41 through the SI-ADC signal end. In this way, the centralized control unit U41 can obtain the charging current size of the lead-acid battery pack, so as to perform abnormal protection such as overcurrent.

[0073] See also Figure 1 , Figure 8 and Fig. 9 The controller further includes: a battery voltage detection circuit and a charging voltage detection circuit, wherein the battery voltage detection circuit is connected to the lead-acid battery pack and the centralized control unit respectively, and the centralized control unit is used to detect the supply voltage of the lead-acid battery pack through the battery voltage detection circuit; the charging voltage detection circuit is connected to the lead-acid battery pack and the centralized control unit respectively, and the centralized control unit is used to detect the charging voltage of the lead-acid battery pack through the battery voltage detection circuit.

[0074] like Figure 8As shown in the figure, the charging voltage detection circuit forms a voltage divider circuit through resistors R53, R52 and R51. After dividing the voltage at the charging end of the lead-acid battery pack, the voltage is output to the charging voltage detection end of the centralized control unit through the PVADCA signal end, thereby detecting the charging voltage. By detecting the charging voltage, it can be determined whether the battery is fully charged, and when the battery is fully charged, the charging control is stopped.

[0075] like Fig. 9 As shown in the figure, the battery voltage detection circuit forms a voltage divider circuit through resistors R31, R32, R33 and R34. After dividing the voltage of the lead-acid battery pack, the voltage is output to the lead-acid battery pack voltage detection terminal of the centralized control unit through the BV-ADC signal terminal, thereby detecting the battery voltage. By detecting the voltage of the lead-acid battery pack, it can be determined whether the lead-acid battery pack is over-discharged. When the lead-acid battery pack is over-discharged, the external discharge of the lead-acid battery pack is stopped, and the lead-acid battery pack is charged.

[0076] See also Figure 1 and Fig.10 The controller further includes a temperature detection circuit, which is connected to the centralized control unit. The centralized control unit is used to detect the temperature of the lead-acid battery pack through the temperature detection circuit. By detecting the temperature of the lead-acid battery pack, the centralized control unit can perform over-temperature protection control on the lead-acid battery pack. Fig.10 As shown in , the temperature detection circuit forms a voltage divider circuit through resistors R61 and R62, which can divide the 2.5V reference voltage and output it to the temperature detection terminal of the centralized control unit U41 through the TEMP-ADC signal terminal to detect the temperature. Among them, resistor R61 or resistor R62 is a thermistor to detect the temperature.

[0077] See also Figure 1 The tower obstacle light power supply circuit also includes a communication interface circuit, a key circuit and a power supply circuit. The communication interface circuit can be used for the communication between the centralized control unit and external devices and the indication of the working status. The key circuit may include one or more control keys to input key control signals to the centralized control unit. The power supply circuit can convert the voltage of the lead-acid battery pack power supply to power the centralized control unit and generate a 2.5V reference voltage to power the temperature detection circuit.

[0078] On the other hand, see Fig.11The present invention also provides an iron tower obstacle light system, comprising: a battery box, a lead-acid battery pack, a solar panel and a navigation light, wherein the iron tower obstacle light power supply circuit according to any one of claims 1 to 9 is provided in the battery box; the lead-acid battery pack is arranged in the battery box; the solar panel is connected to the battery box; the solar panel is connected to the battery box. The iron tower obstacle light system can meet the application requirements of navigation lights in iron tower application scenarios.

[0079] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. The power supply circuit of the iron tower obstacle light is characterized by: include: Battery pack; The controller includes: a centralized control unit, a load power supply control circuit and a solar charging control circuit. The load power supply control circuit is connected to the battery pack and the centralized control unit respectively, so that under the control of the centralized control unit, the power of the battery pack is output to power the load; the solar charging control circuit is connected to the battery pack and the centralized control unit respectively, so that under the control of the centralized control unit, the power output of the solar charging panel is used to charge the battery pack.

2. The power supply circuit of the iron tower obstacle light according to claim 1 is characterized in that: The controller further comprises: Power interface, which is used to electrically connect to the load and the solar charging panel; The front-end protection circuit, the load power supply control circuit and the solar charging control circuit are respectively connected to the power interface through the front-end protection circuit. The front-end protection circuit is used to perform abnormal protection on the signal of the power interface.

3. The power supply circuit of the iron tower obstacle light according to claim 1 is characterized in that: The controller further comprises: A load current detection circuit, the load current detection circuit is connected to the load power supply control circuit and the centralized control unit respectively, and the centralized control unit performs current detection on the load power supply through the load current detection circuit; The charging current detection circuit is connected to the solar charging control circuit and the centralized control unit respectively. The centralized control unit detects the charging current of the battery pack through the charging current detection circuit.

4. The iron tower obstacle light power supply circuit according to claim 1 or 2, characterized in that: The controller further comprises: A battery voltage detection circuit, the battery voltage detection circuit is connected to the battery pack and the centralized control unit respectively, and the centralized control unit detects the power supply voltage of the battery pack through the battery voltage detection circuit; The charging voltage detection circuit is connected to the battery pack and the centralized control unit respectively. The centralized control unit detects the charging voltage of the battery pack through the charging voltage detection circuit.

5. The iron tower obstacle light power supply circuit according to claim 1 or 2, characterized in that: The controller further comprises: The temperature detection circuit is connected to the centralized control unit, and the centralized control unit detects the temperature of the battery pack through the temperature detection circuit.

6. The power supply circuit of the iron tower obstacle light according to claim 1, characterized in that: The load power supply control circuit comprises: A first MOS tube driver, wherein a control signal input terminal of the first MOS tube driver is connected to a load power supply control signal output terminal of the centralized control unit; A first MOS tube (Q81), a gate of the first MOS tube (Q81) is connected to a driving signal output end of a first MOS tube driver through a first resistor (R82), the gate of the first MOS tube (Q81) is also connected to one end of a second resistor (R85) through the first resistor (R82), the other end of the second resistor (R85) is connected to a source of the first MOS tube (Q81), the first MOS tube (Q81) is also connected to a power supply output end of a battery pack, and the first MOS tube (Q81) outputs a control power supply of the battery pack through a drain to supply power to a load.

7. The power supply circuit of the iron tower obstacle light according to claim 1, characterized in that: The solar charging control circuit comprises: A second MOS tube driver, wherein a control signal input terminal of the second MOS tube driver is connected to a first charging control signal output terminal of the centralized control unit; a second MOS tube (Q92), wherein a gate of the second MOS tube (Q92) is connected to a driving signal output terminal of a second MOS tube driver through a third resistor (R92), and a source of the second MOS tube (Q92) is connected to a charging input terminal of a battery pack; A photoelectric coupler, wherein an anode of a light emitting diode of the photoelectric coupler is connected to a second charging control signal output terminal of the centralized control unit, a cathode of the light emitting diode of the photoelectric coupler is connected to a first reference ground (GND), and a collector of a phototransistor of the photoelectric coupler is connected to a power supply; A third MOS tube (QA1), a gate of the third MOS tube (QA1) is connected to the emitter of the photoelectric coupler through a fourth resistor (RA4), a drain of the third MOS tube (QA1) is connected to the drain of the second MOS tube (Q92), and a source of the third MOS tube (QA1) is connected to the power output end of the solar charging panel.

8. The power supply circuit of the iron tower obstacle light according to claim 2, characterized in that: The front-end protection circuit comprises: A first varistor (MOV1), one end of the first varistor (MOV1) is connected to a second reference ground (G-GND); A fuse (F0), one end of the fuse (F0) is connected to the other end of the first varistor (MOV1), and the other end of the fuse (F0) is connected to the positive power output end of the solar charging panel; the one end of the fuse (F0) is also connected to the positive end of the battery pack and the positive end of the load; A second varistor (MOV3), one end of the second varistor (MOV3) is connected to the other end of the first varistor (MOV1), and the other end of the second varistor (MOV3) is connected to the negative power output end of the solar charging panel; A third varistor (MOV2), one end of the third varistor (MOV2) is connected to the negative power output end of the solar charging panel, and the other end of the third varistor (MOV2) is connected to the second reference ground (G-GND); A first capacitor (CX1), one end of the first capacitor (CX1) is connected to the other end of the first varistor (MOV1), and the other end of the first capacitor (CX1) is connected to the negative power output end of the solar charging panel; A second capacitor (CY1), one end of the second capacitor (CY1) is connected to the other end of the first capacitor (CX1), and the other end of the second capacitor (CY1) is connected to a second reference ground (G-GND); a third capacitor (CY3), one end of the third capacitor (CY3) being connected to the other end of the first varistor (MOV1), and the other end of the third capacitor (CY3) being connected to the second reference ground (G-GND); a fourth varistor (MOV4), one end of the fourth varistor (MOV4) is connected to the positive end of the battery pack, and a negative end of the fourth varistor (MOV4) is connected to the negative end of the battery pack; A fifth varistor (MOV5), one end of the fifth varistor (MOV5) is connected to the negative end of the battery pack, and the other end of the fifth varistor (MOV5) is connected to the second reference ground (G-GND).

9. The power supply circuit of the iron tower obstacle light according to claim 3, characterized in that: The load current detection circuit comprises: A current detection resistor (RL1) is connected in series to a power supply circuit of the load; An integrated operational amplifier (U11A), wherein a non-phase input terminal of the integrated operational amplifier (U11A) is connected to a sampling current output terminal of a current detection resistor (RL1) through a resistor R11, an inverting input terminal of the integrated operational amplifier (U11A) is connected to a negative terminal of a battery pack through a fifth resistor (R15), an inverting input terminal of the integrated operational amplifier (U11A) is connected to an output terminal of the integrated operational amplifier (U11A) through a sixth resistor (R12), a seventh resistor (R13) and an eighth resistor (R14) connected in series, and an output terminal of the integrated operational amplifier (U11A) is connected to a load current signal sampling terminal of a centralized control unit.

10. Iron tower obstacle light system, characterized in that: include: A battery box, wherein the power supply circuit for the iron tower obstacle light according to any one of claims 1 to 9 is arranged in the battery box; A battery pack, wherein the battery pack is arranged in the battery box; Solar panels, the solar panels are connected to the battery box.

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