Street lamp integrated controller with output short circuit cut-off function

Abstract

The utility model relates to the field of street lamp integrated controllers, in particular to a street lamp integrated controller with an output short circuit cut-off function. Comprising a centralized controller, the centralized controller comprises a box body, the top of the box body is of an open structure, a box cover is arranged above the box body, the bottom of the box cover is of an open structure, a first dustproof net is arranged in the box cover, and the bottom of the first dustproof net is attached to the top of the box body in a sliding mode; a ventilation opening is formed in the bottom of one side wall of the box body, a mounting box is mounted on the side wall, close to the ventilation opening, of the box body, the bottom of the mounting box is of an open structure, the ventilation opening communicates with the mounting box, and a second dustproof net is arranged in the mounting box. The bottom of the second dustproof net and the bottom of the mounting box are located on the same straight line. According to the embodiment, dust and rainwater can be prevented from entering the box body while good ventilation is guaranteed, and an internal circuit is protected from being affected by the external environment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of road lamp centralized controller, especially relates to a road lamp centralized controller with output short circuit cut-off. BACKGROUND

[0002] With the expansion of wisdom city and wisdom lighting system and the development of fine power management, the intelligent control equipment is applied more and more widely, and the controller is as the central management equipment and control equipment of wisdom lighting management system, is installed in the lighting electrical cabinet, each electrical cabinet generally has multiple loops, and the number of loops is different, in order to be compatible with the application of different scenes, generally will reserve DC interface voltage on the centralized controller, for the power supply of external expansion module, and the DC interface voltage is generally introduced through the AC-DC module auxiliary winding voltage in the controller, if the external expansion module appears abnormal and causes DC interface short circuit, will cause the AC-DC module to detect output short circuit and enter protection mode, continuously detects the output state and restarts constantly, causes the output voltage to appear the phenomenon of hiccup, the output voltage is abnormal, the controller cannot work normally, causes the whole control system to be paralyzed.

[0003] Through the search, in the prior art, Chinese patent publication number: CN202168251U, authorized announcement date: 2012-03-14, discloses a kind of road lamp centralized controller, including processor module, data acquisition module and monitoring module, the state information of road lamp and road lamp branch is obtained by the data acquisition module, and the state information obtained is input into processor module, the state information of road lamp and road lamp branch is monitored by the monitoring module through processor module and control information is issued to control the operating state of road lamp and road lamp branch.The above embodiment reduces the loss of electric energy.

[0004] But the device still has the following defects: the above embodiment does not have protection effect, if dust and rainwater cannot enter the box body, the circuit will be affected by the external environment, which will affect the operation and reduce the service life of the equipment. Utility model content

[0005] In view of the above problems, the utility model provides a kind of road lamp centralized controller with output short circuit cut-off, including centralized controller, the centralized controller includes box body, the top of the box body is open type structure setting, the top of the box body is provided with box cover, the bottom of the box cover is open type structure setting, first dust screen is arranged in the box cover, the bottom of the first dust screen is slidably attached on the top of the box body, ventilation opening is set in the bottom of the side wall of the box body, mounting box is installed on the side wall close to ventilation opening of the box body, the bottom of the mounting box is open type structure setting, ventilation opening and mounting box are communicated, second dust screen is arranged in the mounting box, the bottom of the second dust screen and the bottom of the mounting box are on the same straight line.

[0006] Furthermore, a mounting base is installed at the bottom of the box, and a set of connecting columns are symmetrically installed on the top of the corresponding two side walls of the box. Each set of connecting columns has a set of threaded holes at the end away from the box.

[0007] Furthermore, a set of through holes is symmetrically opened at the bottom of the corresponding two side walls of the box cover, and two sets of screws are symmetrically arranged at both ends of the box cover. The output end of each set of screws passes through the through hole and is threaded into the threaded hole.

[0008] Furthermore, the box is equipped with a shelf, and the top of the shelf has several sets of ventilation holes arranged in a rectangular array.

[0009] Furthermore, the top of the shelf is equipped with a main control unit (MUC), an AC-DC module, a communication module, a control module, and a temperature sensor, and the box is equipped with an installation plate.

[0010] Furthermore, the mounting plate is located below the shelf, and several sets of motors are arranged in a rectangular array below the mounting plate.

[0011] Furthermore, each set of motors has a set of fan blades connected to its output end through the mounting plate, and a wire hole is provided at the bottom of the outer wall of the housing.

[0012] The beneficial effects of this utility model are:

[0013] 1. The open-structure enclosure and lid, along with the design of the first and second dustproof nets, ensure good ventilation while preventing dust and rainwater from entering the enclosure and protecting the internal circuitry from external environmental influences.

[0014] 2. The temperature sensor is used to monitor the internal operating temperature of the controller. Combined with the control module, it can automatically adjust the fan blade speed according to the actual situation to maintain a suitable operating temperature range, thereby ensuring stable operation of the equipment.

[0015] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A controller framework diagram according to an embodiment of the present invention is shown;

[0018] Figure 2 A frame diagram of an AC-DC module according to an embodiment of the present invention is shown;

[0019] Figure 3 A circuit diagram of a load short-circuit disconnection output protection circuit according to an embodiment of the present invention is shown;

[0020] Figure 4 A system block diagram of a controller according to an embodiment of the present invention is shown;

[0021] Figure 5 A system circuit diagram of the controller according to an embodiment of the present invention is shown;

[0022] Figure 6 A circuit flowchart of control method 1 according to an embodiment of the present invention is shown;

[0023] Figure 7 A circuit flowchart of control method 2 according to an embodiment of the present invention is shown.

[0024] In the diagram: 1. Central controller; 2. AC-DC module; 3. Communication module; 4. Control module; 6. Housing; 7. Mounting base; 8. Connecting column; 9. Threaded hole; 10. Cover; 11. First dustproof net; 12. Screw; 13. Shelf; 14. Ventilation hole; 15. Main control unit (MUC); 16. Through hole; 17. Temperature sensor; 18. Mounting plate; 19. Motor; 20. Fan blade; 21. Wire hole; 22. Ventilation opening; 23. Mounting box; 24. Second dustproof net. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] This utility model embodiment provides a street light centralized controller with output short-circuit cutoff, including a centralized controller 1, exemplarily, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the centralized controller 1 includes a housing 6. The top of the housing 6 is an open structure, and a mounting base 7 is installed at the bottom of the housing 6. A set of connecting posts 8 are symmetrically installed on the top of the corresponding two side walls of the housing 6. A set of threaded holes 9 are opened at the end of each set of connecting posts 8 away from the housing 6. A cover 10 is provided on the top of the housing 6. The bottom of the cover 10 is an open structure. A first dustproof net 11 is provided inside the cover 10. The bottom of the first dustproof net 11 slides against the top of the housing 6. A set of through holes 16 are symmetrically opened on the bottom of the corresponding two side walls of the cover 10. Two sets of screws 12 are symmetrically provided at both ends of the cover 10. The output end of each set of screws 12 passes through the through hole 16 and is threaded into the threaded hole 9.

[0027] The enclosure 6 contains a shelf 13. The top of the shelf 13 has several sets of ventilation holes 14 arranged in a rectangular array. The top of the shelf 13 also houses a main control unit (MUC) 15, an AC-DC module 2, a communication module 3, a control module 4, and a temperature sensor 17. The enclosure 6 also contains a mounting plate 18 located below the shelf 13. Below the mounting plate 18, several sets of motors 19 are arranged in a rectangular array. The output of each set of motors 19 is... A set of fan blades 20 is connected to the drive after passing through the mounting plate 18. A wire hole 21 is opened at the bottom of the outer wall of the housing 6. A ventilation opening 22 is opened at the bottom of one side wall of the housing 6. A mounting box 23 is installed on the side wall of the housing 6 near the ventilation opening 22. The bottom of the mounting box 23 is set with an open structure. The ventilation opening 22 is connected to the mounting box 23. A second dustproof net 24 is set inside the mounting box 23. The bottom of the second dustproof net 24 is on the same straight line as the bottom of the mounting box 23.

[0028] Working principle: After rotating screw 12 to pull out through hole 16 and threaded hole 9, the box cover 10 moves up and moves the first dustproof net 11 away from the box body 6, so that the equipment on the top of the shelf 13 can be inspected and maintained. After rotating screw 12 through through hole 16, it is threaded into threaded hole 9, and the installation is completed. It is easy to install and disassemble, and is simple and quick.

[0029] The cabinet 6 is equipped with a shelf 13 and a mounting plate 18, and is equipped with components such as ventilation holes 14, motor 19 and fan blades 20 in the corresponding positions, which helps to form a good air circulation path, effectively improve the heat dissipation performance of internal electronic components, and extend their service life.

[0030] Temperature sensor 17 is used to monitor the internal operating temperature of the centralized controller 1. Combined with the control module 4, it can automatically adjust the speed of the fan blade 20 according to the actual situation to maintain a suitable operating temperature range, thereby ensuring stable operation of the equipment.

[0031] The open-structure enclosure 6 and enclosure cover 10, along with the design of the first dustproof net 11 and the second dustproof net 24, ensure good ventilation while preventing dust and rainwater from entering the enclosure 6 and protecting the internal circuitry from external environmental influences. Example 1:

[0032] For example, such as Figure 4 , Figure 5 and Figure 6 As shown, based on the above-mentioned street light centralized controller 1 with output short-circuit cutoff, this embodiment of the invention also proposes a control method for the control system. Specifically, the control method includes:

[0033] The AC-DC module 2 includes an EMC circuit, a rectifier and filter circuit, a PWM control circuit, a transformer, a main voltage output Vo1, and an auxiliary voltage output Vo2. The main voltage output Vo1 is electrically connected to the communication module 3, and the auxiliary voltage output Vo2 is led out to a reserved DC interface to power the external expansion module. The communication module 3 is electrically connected to the control module 4.

[0034] When the circuit starts up, the main voltage output Vo1 winding is rectified by diode D1 and charges capacitor C1, causing the voltage to rise. However, due to the P-MOS transistor Q2, it does not conduct during startup, resulting in no voltage output.

[0035] Capacitor C2 is charged through diode D3 and resistor R1, and the voltage rises to Vo3. The voltage of Vo3 is approximately: RL / / (R4+R5) / [R1+RL / / (R4+R5)]. The voltage of Vo4 is approximately: Vo3*R5 / (R4+R5). The voltage of Vo4 is amplified by the operational amplifier U1, and Vo5=Vo4*(R6+R7) / R6.

[0036] As the capacitor charges, the voltage gradually increases. When the voltage Vo5 exceeds the base bias voltage of transistor Q3, transistor Q3 turns on, pulling resistor R3 to ground. Resistor R2 forms a voltage drop, driving P-MOS transistor Q2 to turn on. Voltage Vo2 charges capacitor C2, and voltage Vo3 increases until Vo3 = Vo2. Meanwhile, diode D3 has a voltage drop and is reverse-biased, not conducting.

[0037] When the external expansion module experiences a short circuit, capacitor C2 discharges, the voltage of Vo3 becomes 0V, the voltage of Vo4 also becomes 0V, the operational amplifier U1 outputs a low level, the transistor does not conduct, there is no voltage drop across resistor R2, Q2 is open, and the output is disconnected. At this time, the voltage of capacitor C1 remains normal at Vo2, without affecting other circuits of the entire centralized controller 1.

[0038] When the external expansion module is uncircuited, capacitor C2 is charged again through diode D3 and resistor R1, repeating the process when the circuit starts up. Example 2:

[0039] For example, such as Figure 4 , Figure 5 and Figure 6 As shown, based on the aforementioned street light centralized controller 1 with output short-circuit cutoff, this embodiment proposes a control method for the control system. Specifically, the control method includes:

[0040] The AC-DC module 2 includes an EMC circuit, a rectifier and filter circuit, a PWM control circuit, a transformer, a main voltage output Vo1, and an auxiliary voltage output Vo2. The main voltage output Vo1 is electrically connected to the communication module 3, and the auxiliary voltage output Vo2 is led out to a reserved DC interface to power the external expansion module. The communication module 3 is electrically connected to the control module 4.

[0041] When the circuit starts, the transformer winding charges capacitor C1 after rectification by diode D1, and the voltage rises. Due to the P-MOS transistor Q2, Q2 does not conduct during startup, so there is no voltage output. Capacitor C2 is charged through diode D3 and resistor R1, and the voltage rises to Vo3. The voltage of Vo3 is approximately: RL / / (R4+R5) / [R1+RL / / (R4+R5)], and the voltage of Vo4 is approximately: Vo3*R5 / (R4+R5).

[0042] As the capacitor charges, the voltage gradually increases. When the voltage Vo4 exceeds the base bias voltage of transistor Q3, Q3 turns on, pulling resistor R3 to ground. Resistor R2 forms a voltage drop, driving MOSFET Q2 to turn on. Voltage Vo2 charges capacitor C2, and voltage Vo3 increases until Vo3 equals Vo2. Diode D3, however, has a voltage drop and is reverse-biased, not conducting.

[0043] When the external expansion module experiences a short circuit, capacitor C2 discharges, the voltage of Vo3 becomes 0V, the voltage of Vo4 also becomes 0V, the transistor does not conduct, there is no voltage drop across resistor R2, Q2 is open, and the output is disconnected. At this time, the voltage of capacitor C1 remains normally at Vo2, without affecting other circuits of the entire centralized controller 1.

[0044] When the external expansion module is uncircuited, capacitor C2 is charged again through diode D3 and resistor R1, repeating the process when the circuit starts up.

[0045] Beneficial effects: Once an abnormal short circuit is detected in the external expansion module, it can react quickly, cut off the relevant power supply lines, and automatically cut off the output voltage Vo2. By discharging through capacitor C2, the voltages of Vo3 and Vo4 drop to 0V, causing transistor Q3 to stop conducting, thereby turning off P-MOS transistor Q2. The circuit is simple, has a fast response speed, and effectively prevents damage to the entire circuit caused by short circuit current.

[0046] Once the external short circuit is removed, the circuit can automatically return to normal operation without manual intervention. The C2 capacitor is recharged and the circuit is reactivated according to the normal startup process, ensuring stability and reliability.

[0047] While handling the short circuit, the main voltage output Vo1 and its connected communication module 3 and other key components can still operate normally, ensuring that the overall function of the street light central controller 1 is not affected.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A street light centralized controller with output short-circuit cutoff, comprising a centralized controller (1), characterized in that: The centralized controller (1) includes a housing (6), the top of the housing (6) is an open structure, a cover (10) is provided on the top of the housing (6), the bottom of the cover (10) is an open structure, a first dustproof net (11) is provided inside the cover (10), the bottom of the first dustproof net (11) slides against the top of the housing (6), a ventilation opening (22) is provided at the bottom of one side wall of the housing (6), an installation box (23) is installed on the side wall of the housing (6) near the ventilation opening (22), the bottom of the installation box (23) is an open structure, the ventilation opening (22) is connected to the installation box (23), a second dustproof net (24) is provided inside the installation box (23), the bottom of the second dustproof net (24) and the bottom of the installation box (23) are on the same straight line.

2. The street light centralized controller with output short-circuit cutoff as described in claim 1, characterized in that: The bottom of the box (6) is equipped with a mounting base (7), and a set of connecting columns (8) are symmetrically installed on the top of the corresponding two side walls of the box (6). Each set of connecting columns (8) has a set of threaded holes (9) at the end away from the box (6).

3. The street light centralized controller with output short-circuit cutoff as described in claim 2, characterized in that: The bottom of the corresponding two side walls of the box cover (10) are symmetrically provided with a set of through holes (16). Two sets of screws (12) are symmetrically provided at both ends of the box cover (10). The output end of each set of screws (12) passes through the through hole (16) and is threaded into the threaded hole (9).

4. The street light centralized controller with output short-circuit cutoff as described in claim 1, characterized in that: The box (6) is provided with a shelf (13), and the top of the shelf (13) is provided with a number of ventilation holes (14) in a rectangular array.

5. The street light centralized controller with output short-circuit cutoff as described in claim 4, characterized in that: The top of the shelf (13) is provided with a main control unit MUC (15), an AC-DC module (2), a communication module (3), a control module (4) and a temperature sensor (17), and the box (6) is provided with an installation plate (18).

6. The street light centralized controller with output short-circuit cutoff as described in claim 5, characterized in that: The mounting plate (18) is located below the shelf (13), and several sets of motors (19) are arranged in a rectangular array below the mounting plate (18).

7. The street light centralized controller with output short-circuit cutoff as described in claim 6, characterized in that: Each set of motors (19) has a set of fan blades (20) connected to the output end of the motor (18) through the mounting plate (18), and a wire hole (21) is opened at the bottom of the outer wall of the housing (6).

Images