Energy-saving street lamp

Abstract

The utility model relates to an energy-saving street lamp which comprises a shell. The lamp panel is mounted in the shell, and a plurality of lamp beads are arranged on the lamp panel; the control box is mounted in the shell; the radar sensor is mounted on the shell and is suitable for sensing and detecting a motion signal 10-20 meters away from the street lamp; the control unit is arranged in the control box, is electrically connected with the radar sensor and the PWM dimming power supply, and is suitable for receiving the motion signals of the radar sensor and transmitting different output signals to the PWM dimming power supply based on the motion signals of different distances; and the PWM dimming power supply is arranged in the control box, is electrically connected with the control unit and the lamp panel respectively, and is suitable for outputting different powers to the lamp panel through automatic level adjustment so as to adjust the brightness of the lamp beads. A hole is formed in the head of the street lamp to install a radar sensor, the radar sensor is electrically connected with a controller in the street lamp, the controller receives a motion signal of the radar sensor, the controller controls the output power of a PWM dimming power source through the motion signal, and then the brightness of lamp beads on a lamp panel is adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to road lamp technical field especially relates to a kind of energy-saving street lamps. BACKGROUND

[0002] Street lamp, refers to the lamp that provides lighting function for road, refers to the lamp in the range of road lighting in traffic lighting, street lamp is

[0003] It is widely used in various places needing illumination.

[0004] The existing street lamp usually does not have the function of automatically sensing and adjusting brightness, and a small part of intelligent street lamp, such as a Chinese utility model patent with the announcement number CN213334027U, discloses a combined intelligent street lamp, which comprises a lamp holder, a street lamp assembly and a control circuit, the street lamp assembly is installed on the upper part of the lamp holder, and the control circuit controls a plurality of street lamp assemblies; the control circuit comprises a power supply, a light sensing circuit, an induction signal amplification circuit and a street lamp driving circuit, the light sensing circuit, the induction signal amplification circuit and the street lamp driving circuit are all connected to the power supply, the light sensing circuit is connected to the street lamp driving circuit through the induction signal amplification circuit; the street lamp assembly comprises an LED lamp, a fixing block and a U-shaped connecting strip, the LED lamp is movably connected to the two ends of the U-shaped connecting strip through the fixing block, and the upper end of the U-shaped connecting strip is connected to the lamp holder. The utility model has the advantages of simple structure, convenient operation, stability, reliability, long service life and adjustable light direction; the LED lamp can be automatically turned on or off according to the light intensity of the road environment, and the brightness can be automatically adjusted.

[0005] In the above-mentioned scheme, the light sensing circuit is used to control the automatic turning on or off of the LED lamp according to the light intensity of the road environment, but the setting of the light sensing circuit has the problems of signal interference, limited signal range, difficult fault diagnosis and high cost. SUMMARY

[0006] In order to solve the above-mentioned problems, the purpose of the utility model is to provide an energy-saving street lamp, which is characterized by being provided with a radar sensor connected to a controller on the street lamp, which can detect the movement of the target, and the signal of the relative induction circuit is strong, the signal range is wide, and the maintenance is easy. After the control unit receives the signal of the radar sensor, the brightness of the lamp beads can be automatically adjusted by the PWM dimming power supply, so as to achieve the purpose of energy saving. In addition, the whole street lamp is easy to disassemble and assemble, and the lamp panel and the internal control box are easy to maintain.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] An energy-saving street lamp, characterized by comprising:

[0009] A shell;

[0010] A lamp panel is installed in the shell and a plurality of lamp beads are arranged on the lamp panel;

[0011] A control box is installed in the shell;

[0012] A radar sensor is installed on the shell and is adapted to sense and detect a motion signal within a distance of 10-20 meters from the street lamp 10;

[0013] A control unit is arranged in the control box and is electrically connected with the radar sensor and the PWM dimming power supply, is adapted to receive the sensing signal of the radar sensor, and transmits different output signals to the PWM dimming power supply;

[0014] The PWM dimming power supply is arranged in the control box and is electrically connected with the control unit and the lamp panel, is adapted to automatically adjust the level to output different powers to the lamp panel to adjust the brightness of the lamp beads.

[0015] As a preferred, the radar sensor comprises a terminal part fixedly installed on the shell and a sensing part detachably arranged on the terminal part, the terminal part is provided with a sensing circuit board electrically connected with the PWM dimming power supply, and the sensing part is provided with a sensor connected with the sensing circuit board.

[0016] As a preferred, the lower part of the sensing part is provided with a connecting head, the surface of the connecting head is provided with an external thread, the terminal part is provided with a connecting groove, and the inner wall of the connecting groove is provided with an internal thread matched with the external thread.

[0017] As a preferred, the sensor is provided with three probes telescopically arranged to extend from the lower end of the connecting head, and the sensing circuit board is provided with three circles of copper foils, the three probes can extend into the connecting groove and abut against the three circles of copper foils.

[0018] As a preferred, the shell comprises a bottom cover, the bottom cover is provided with a lamp panel cavity and a power supply cavity at intervals, the lamp panel cavity is provided with a lamp panel mounting groove, the lamp panel is fixedly installed in the lamp panel mounting groove, the upper end cover of the lamp panel mounting groove is provided with a glass cover plate, and the upper end of the glass cover plate is circumferentially provided with a plurality of pressing blocks, and the pressing blocks are fixedly installed in the lamp panel cavity.

[0019] As a preferred, the outer side of the lamp panel mounting groove is circumferentially provided with a plurality of connecting seats, the connecting seat comprises a screw column and support columns formed on both sides of the screw column, and the pressing blocks are arranged on the support columns and are fixedly connected with the screw column through screws.

[0020] As a preferred, a plurality of heat dissipation short ribs are circumferentially arranged between the side wall of the lamp panel mounting groove and the bottom cover, at least one heat dissipation short rib is provided with a first reinforcing column, and the back surface of the bottom cover is provided with a plurality of heat dissipation long ribs, and each heat dissipation long rib is provided with a plurality of second reinforcing columns.

[0021] As a preferred, a first sealing ring is press-fitted between the glass cover plate and the heat dissipation short rib, and the first sealing ring is clamped between the connecting seat and the lamp panel mounting groove.

[0022] As preferred, the outer side of the power supply cavity is fixedly provided with a cover shell, the power supply cavity is provided with a power supply mounting groove, the power supply mounting groove is fixedly provided with a heat dissipation aluminum plate, and the heat dissipation aluminum plate is fixedly provided with the control box; one end of the control box is connected with a power line, the other end is connected with two signal lines, one signal line is connected with the terminal part of the radar sensor through a first connecting terminal, and the other signal line is connected with the lamp panel through a second connecting terminal; a wire pipe through which the power supply line passes is arranged between the lamp panel cavity and the power supply cavity;

[0023] The outer side of the power supply mounting groove is provided with a sealing wall, a clamping groove is formed between the sealing wall and the side wall of the power supply mounting groove, and a second sealing ring is arranged in the clamping groove; the inner side of the cover shell is provided with a ring of pressing walls for pressing the second sealing ring, and the cover shell is provided with a mounting hole, and the terminal part is fixedly arranged on the mounting hole.

[0024] As preferred, the mounting handle connected with the lamp post is further arranged, the lower end of the cover shell is provided with a matching groove, a plurality of first limiting strips are arranged in the middle of the bottom surface of the matching groove, fixing holes are arranged on both sides of the bottom surface of the matching groove, a wire hole through which the power supply line passes is further arranged in the middle of the bottom surface of the matching groove, and a wire seat is fixedly arranged on the wire hole; the mounting handle comprises an arc-shaped block arranged in the matching groove, waist-shaped holes corresponding to the fixing holes are arranged on both sides of the arc-shaped block, a through hole corresponding to the wire hole is arranged in the middle of the arc-shaped block, and second limiting strips for limiting the first limiting strips are arranged on the inner end surface of the arc-shaped block.

[0025] The above technical scheme has the following beneficial effects:

[0026] ①, the radar sensor is arranged in the hole of the head of the street lamp, the radar sensor is a microwave Doppler sensor, and the motion state of an object can be detected. The radar sensor is electrically connected with the controller in the street lamp, the controller receives the motion signal of the radar sensor, the controller controls the output power of the PWM dimming power supply through the motion signal, and then the brightness of the lamp beads on the lamp panel is adjusted.

[0027] The signal range of the radar sensor is wide, and the motion signal within 10-20 meters from the street lamp can be sensed and detected.

[0028] The signal is strong, and can penetrate acrylic, glass and thin non-metallic materials.

[0029] Specifically, the operation mode of the street lamp is as follows: at night, when the brightness is lower than 10 Lux, the street lamp light is turned on to enter a working state, when a person / car is sensed to be close to the street lamp at a distance of about 8 m, the brightness of the street lamp light is 100%, when no person / car is sensed for 20 seconds, the brightness of the street lamp light is 20%, and when no person / car is sensed for another 30 seconds, the brightness of the street lamp light is 5%, so that the energy-saving purpose is achieved, the invalid illumination time of the street lamp is greatly reduced, the energy consumption is reduced, and the energy-saving rate of the street lamp without using the microwave Doppler sensor is more than 55%.

[0030] 2. The radar sensor is small in size, and the terminal part and the sensing part are easy to disassemble and assemble, and easy to install and maintain.

[0031] 3. The glass cover plate is pressed by a pressing plate, and the two sides of the cover shell are connected to the bottom cover by bolts, so that the lamp plate cavity and the power cavity are easy to disassemble and assemble, and easy to maintain.

[0032] 4. The installation handle cooperates with the cover shell, the angle between the shell and the installation handle can be adjusted, the illumination angle can be adjusted, and the application range is wide. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a schematic diagram of a three-dimensional structure of an energy-saving street lamp.

[0034] Figure 2 It is a schematic diagram of a front structure of a radar sensor.

[0035] Figure 3 It is a schematic diagram of the installation of the terminal part of the radar sensor on the street lamp.

[0036] Figure 4 It is a schematic diagram of the installation of the terminal part of the radar sensor on the street lamp. Figure 3 It is a schematic diagram of the installation of the terminal part of the radar sensor on the street lamp.

[0037] Figure 5 It is a schematic diagram of a three-dimensional structure of a radar sensor.

[0038] Figure 6 It is a schematic diagram of the arrangement of the heat dissipation long ribs on the back of the energy-saving street lamp.

[0039] Figure 7 It is a schematic diagram of the internal structure of an energy-saving street lamp.

[0040] Figure 8 It is a schematic diagram of the arrangement of the first sealing ring outside the lamp plate.

[0041] Figure 9 It is a schematic diagram of the arrangement of the first limiting strip on the cover shell.

[0042] Figure 10 It is a schematic diagram of a three-dimensional structure of an installation handle. DETAILED DESCRIPTION

[0043] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0044] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0045] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0046] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0047] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and inclined upward of the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and inclined downward of the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0048] As Figures 1-10The energy-saving street lamp shown comprises a shell 1, a lamp panel 2 installed in the shell 1 and provided with a plurality of lamp beads 3, a control box 4 installed in the shell 1, a radar sensor 5 installed on the shell 1 and adapted to sense and detect a motion signal at a distance of 10-20 meters from the street lamp 10, a control unit arranged in the control box 4 and electrically connected with the radar sensor 5 and a PWM dimming power supply, adapted to receive the sensing signal of the radar sensor 5 and deliver different output signals to the PWM dimming power supply, and the PWM dimming power supply arranged in the control box 4 and electrically connected with the control unit and the lamp panel 2, adapted to automatically adjust the output power to the lamp panel 2 to adjust the brightness of the lamp beads 3.

[0049] In the above technical solution, the 5.8G high-altitude radar sensor is installed at the head of the street lamp, the radar sensor is a microwave Doppler sensor and can detect the motion state of an object. The radar sensor is electrically connected with a controller in the street lamp, the controller receives the motion signal of the radar sensor, and the controller controls the output power of the PWM dimming power supply through the motion signal to adjust the brightness of the lamp beads on the lamp panel.

[0050] The radar sensor has a wide signal range and can sense and detect a motion signal at a distance of 10-20 meters from the street lamp.

[0051] The signal is strong and can penetrate acrylic, glass and thin non-metallic materials.

[0052] Specifically, the operation mode of the street lamp is as follows: at night, when the brightness is lower than 10 Lux, the street lamp light is turned on to enter a working state, when a person / car is sensed to approach the street lamp at a distance of about 8 meters, the brightness of the street lamp light is 100%, when no person / car is sensed for 20 seconds, the brightness of the street lamp light is 20%, and when no person / car is sensed for another 30 seconds, the brightness of the street lamp light is 5%, thereby achieving the purpose of energy saving, greatly reducing the invalid lighting time of the street lamp, reducing energy consumption, and saving more than 55% of energy compared with the street lamp without using the microwave Doppler sensor.

[0053] Further, the radar sensor 5 comprises a terminal portion 6 fixedly installed on the shell 1 and a sensing portion 7 detachably arranged on the terminal portion 6, the terminal portion 6 is provided with a sensing circuit board 8 electrically connected with the PWM dimming power supply, and the sensing portion 7 is provided with a sensor connected with the sensing circuit board 8. In this technical solution, the radar sensor is small in size and is separately installed, and the terminal portion and the sensing portion are detachably designed, which is easy to install and maintain.

[0054] Further, the lower part of the sensing portion 7 is provided with a connecting head 9, the surface of the connecting head 9 is provided with an external thread 10, the terminal portion 6 is provided with a connecting groove 11, and the inner wall of the connecting groove 11 is provided with an internal thread 12 matched with the external thread 10. In this technical solution, the sensing portion and the terminal portion are threadedly connected, which is convenient to disassemble and assemble and has good waterproof effect.

[0055] Further, the inductor is telescopic with three probes 13 extending from the lower end of the connecting head 9, and the inductor circuit board 8 is provided with three copper foils 14, the three probes 13 can extend into the connecting groove 11 and abut with the three copper foils 14. In this technical solution, the probes are telescopic, which ensures that the probes pop out and contact the copper foils on the inductor circuit board when the inductor is screwed onto the terminal, and prevents the probes from being deformed by being pressed. Moreover, the three copper foils correspond to the three probes, which ensures that the two are always in contact after screwing. It should be noted that the terminal part connected to the first terminal has three pins, which are respectively a power pin for inputting 7-12V voltage, a common pin for grounding, and an output pin for outputting 0-10V dimming signal.

[0056] Further, the shell 1 includes a bottom cover 15, the bottom cover 15 is provided with a lamp plate cavity 16 and a power cavity 17 at intervals, the lamp plate cavity 16 is provided with a lamp plate mounting groove 18, and the lamp plate 2 is fixedly installed in the lamp plate mounting groove 18. The upper end of the lamp plate mounting groove 18 is provided with a glass cover plate 19, the upper end of the glass cover plate 19 is circumferentially provided with a plurality of pressing blocks 20, and the pressing blocks 20 are fixedly installed in the lamp plate cavity 16. In this technical solution, the glass cover plate is not easy to be fixedly installed, a plurality of pressing blocks are used to press the glass cover plate, the pressing blocks are fixed in the lamp plate cavity, which is very convenient to disassemble and assemble, and avoids the problem that the glass cover plate is easy to crack during processing.

[0057] Further, the outer side of the lamp plate mounting groove 18 is circumferentially provided with a plurality of connecting seats 21, the connecting seat 21 includes a screw column 22 and a support column 23 formed on both sides of the screw column 22, and the pressing block 20 is arranged on the support column 23 and fixedly connected with the screw column 22 through a screw. In this technical solution, the screw column is used to cooperate with the pressing block for fixation, and the support column improves the structural strength of the screw column while maintaining the flatness of the pressing block.

[0058] Further, a plurality of heat dissipation short ribs 24 are circumferentially arranged between the side wall of the lamp plate mounting groove 18 and the bottom cover 15, at least one heat dissipation short rib 24 is provided with a first reinforcing column 25, and the back surface of the bottom cover 15 is provided with a plurality of heat dissipation long ribs 26, and each heat dissipation long rib 26 is provided with a plurality of second reinforcing columns 27. In this technical solution, a plurality of heat dissipation short ribs are arranged around the lamp plate mounting groove, which is beneficial to heat dissipation of the lamp plate, improves the structural strength between the lamp plate mounting groove and the bottom cover, and the first reinforcing column is arranged on the heat dissipation short rib to further improve the structural strength of the heat dissipation short rib. The heat dissipation long rib arranged on the back surface of the bottom cover can improve the overall heat dissipation of the street lamp, and the second reinforcing column further improves the structural strength of the heat dissipation long rib.

[0059] Further, a first sealing ring 28 is arranged between the glass cover plate 19 and the heat dissipation short rib 24, and the first sealing ring 28 is clamped between the connecting seat 21 and the lamp plate mounting groove 18. In this technical solution, the first sealing ring plays a role in sealing, dustproofing and waterproofing the periphery of the lamp plate mounting groove.

[0060] Further, the outer side of the power supply cavity 17 is fixedly provided with a cover shell 29, the power supply cavity 17 is provided with a power supply mounting groove 30, the power supply mounting groove 30 is fixedly provided with a heat dissipation aluminum plate 31, and the heat dissipation aluminum plate 31 is fixedly provided with the control box 4; one end of the control box 4 is connected with a power supply line 32, the other end is connected with two signal lines 33, one signal line 33 is connected with the terminal portion 6 of the radar sensor 5 through a first wiring terminal 34, and the other signal line 33 is connected with the lamp plate 2 through a second wiring terminal 35; the lamp plate cavity 16 and the power supply cavity 17 are communicated and provided with a wire-through pipe 36 through which the power supply line passes;

[0061] The outer side of the power supply mounting groove 30 is provided with a sealing wall 37, a clamping groove is formed between the sealing wall 37 and the side wall of the power supply mounting groove 30, and the clamping groove is provided with a second sealing ring 38; the inner side of the cover shell 29 is provided with a ring of pressing walls 39 pressing the second sealing ring 38, and the cover shell 29 is provided with a mounting hole in which the terminal portion 6 is fixedly arranged.

[0062] In the above technical solution, the heat dissipation aluminum plate improves the heat dissipation of the electronic elements on the control box, and the two wiring terminals facilitate wiring; and the second sealing ring plays a sealing, dustproof and waterproof role on the power supply mounting groove.

[0063] Further, the street lamp further comprises a mounting handle 40 connected with the lamp post, the lower end of the cover shell 29 is provided with a matching groove 41, a plurality of first limiting strips 42 are arranged on the middle part of the bottom surface of the matching groove 41, fixing holes 43 are arranged on both sides of the bottom surface of the matching groove 41, a wire-through hole 44 through which the power supply line 32 passes is further arranged on the middle part of the bottom surface of the matching groove 41, and a wire-through seat 45 is fixedly arranged on the wire-through hole 44; the mounting handle 40 comprises an arc-shaped block 46 arranged in the matching groove 41, waist-shaped holes 47 corresponding to the fixing holes 43 are arranged on both sides of the arc-shaped block 46, a through hole 48 corresponding to the wire-through hole 44 is arranged on the middle part of the arc-shaped block 46, and a second limiting strip 49 limiting the first limiting strip 42 is arranged on the inner end surface of the arc-shaped block 46.

[0064] In the above technical solution, the lower end of the mounting handle is matched with the lamp post erected on the ground, the waist-shaped holes on the arc-shaped block correspond to the fixing holes on the cover shell, so that the two can be rotatably matched at a certain angle, facilitating the adjustment of the lighting angle of the street lamp; meanwhile, the first limiting strip and the second limiting strip are engaged and matched between the two, so that the two are prevented from loosening in the fixed installation state, and the stability is improved. Figure 1 As shown in the figure, a large bolt 100 is arranged in the waist-shaped hole, and a pressing piece 101 is arranged to fix the mounting handle and the cover shell.

[0065] In the specific embodiment, in order to solve the problems of signal interference, limited signal range, difficult fault diagnosis and high cost in the existing street lamp energy saving scheme, a 5.8G high-altitude radar sensor (height below 12 meters) is installed in the opening of the head of the street lamp. The radar sensor is a microwave Doppler sensor, which can detect the motion state of the object. The radar sensor is electrically connected with the controller in the street lamp. The controller receives the motion signal of the radar sensor. The controller controls the output power of the PWM dimming power supply through the motion signal, and then adjusts the brightness of the lamp beads on the lamp panel.

[0066] The signal range of the radar sensor is wide, and the motion signal within 10-20 meters from the street lamp can be sensed and detected.

[0067] The signal is strong, and can penetrate acrylic, glass and thin non-metallic materials. It is not affected by temperature, humidity, air flow, dust, noise, light and dark, and has strong anti-interference ability.

[0068] Specifically, the operation mode of the street lamp is as follows: at night, when the brightness is lower than 10 Lux, the street lamp light is turned on to enter the working state. When a person / car is sensed to approach the street lamp at a distance of about 8m, the brightness of the street lamp light is 100%. When no person / car is sensed for 20 seconds, the brightness of the street lamp light is 20%. When no person / car is sensed for another 30 seconds, the brightness of the street lamp light is 5%, so as to achieve the purpose of energy saving, greatly reduce the invalid lighting time of the street lamp, reduce the energy consumption, and save more than 55% of energy compared with the street lamp without using the microwave Doppler sensor. The radar sensor is small in size, and the terminal part and the sensing part are easy to disassemble and assemble, so it is easy to install and maintain. In addition, the control unit of the present case is MCU, which has higher integration, embeds multiple digital filter algorithms, has higher stability, stronger anti-interference ability, and stable output of high and low level, PWM and other control signals.

[0069] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments without departing from the principles and purposes of the present application within the scope of the present application.

Claims

1. An energy saving street light characterized by: Include: The shell (1); The lamp plate (2) is installed in the shell (1), and a plurality of lamp beads (3) are arranged on the lamp plate (2); The control box (4) is installed in the shell (1); The radar sensor (5) is installed on the shell (1), and is suitable for sensing and detecting the motion signal of the road lamp 10-20 meters away; The control unit is arranged in the control box (4), and is electrically connected with the radar sensor (5) and the PWM dimming power supply respectively, is suitable for receiving the sensing signal of the radar sensor (5), and transmitting different output signals to the PWM dimming power supply; The PWM dimming power supply is arranged in the control box (4), and is electrically connected with the control unit and the lamp plate (2), is suitable for automatically adjusting the level to output different power to the lamp plate (2) to adjust the brightness of the lamp bead (3).

2. The energy saving street light as claimed in claim 1, wherein: The radar sensor (5) includes a terminal part (6) fixedly installed on the shell (1) and a sensing part (7) detachably arranged on the terminal part (6), the terminal part (6) is provided with a sensing circuit board (8) electrically connected with the PWM dimming power supply, and the sensing part (7) is provided with a sensor connected with the sensing circuit board (8).

3. The energy saving street light as claimed in claim 2, wherein: The lower part of the sensing part (7) is provided with a connecting head (9), the surface of the connecting head (9) is provided with an external thread (10), the terminal part (6) is provided with a connecting groove (11), and the inner wall of the connecting groove (11) is provided with an internal thread (12) matched with the external thread (10).

4. The energy-saving street lamp according to claim 3, characterized in that: Three probes (13) extending from the lower end of the connecting head (9) are arranged on the sensor, three copper foils (14) are arranged on the sensing circuit board (8), and the three probes (13) can be inserted into the connecting groove (11) and abutted with the three copper foils (14).

5. The energy saving street light as claimed in claim 2, wherein: The shell (1) includes a bottom cover (15), the bottom cover (15) is provided with a lamp plate cavity (16) and a power supply cavity (17) at intervals, the lamp plate cavity (16) is provided with a lamp plate mounting groove (18), the lamp plate (2) is fixedly installed in the lamp plate mounting groove (18), the upper end cover of the lamp plate mounting groove (18) is provided with a glass cover plate (19), and the upper end of the glass cover plate (19) is circumferentially provided with a plurality of pressing blocks (20), and the pressing blocks (20) are fixedly installed in the lamp plate cavity (16).

6. The energy saving street light as claimed in claim 5, wherein: The outer side of the lamp plate mounting groove (18) is circumferentially provided with a plurality of connecting seats (21), the connecting seat (21) includes a screw column (22) and a support column (23) formed on both sides of the screw column (22), and the pressing block (20) is arranged on the support column (23) and fixedly connected with the screw column (22) through a screw.

7. The energy saving street light as claimed in claim 5, wherein: A plurality of heat dissipation short ribs (24) are circumferentially arranged between the side wall of the lamp plate mounting groove (18) and the bottom cover (15), at least one heat dissipation short rib (24) is provided with a first reinforcing column (25); The back of the bottom cover (15) is provided with a plurality of heat dissipation long ribs (26), and each heat dissipation long rib (26) is provided with a plurality of second reinforcing columns (27).

8. The energy saving street light of claim 7, wherein: The first sealing ring (28) is arranged between the glass cover plate (19) and the heat dissipation short rib (24), and the first sealing ring (28) is clamped between the connecting seat (21) and the lamp plate mounting groove (18).

9. The energy saving street light as claimed in claim 5, wherein: The outer side of the power supply cavity (17) is fixedly provided with a cover shell (29), the power supply cavity (17) is provided with a power supply mounting groove (30), the power supply mounting groove (30) is fixedly provided with a heat dissipation aluminum plate (31), and the heat dissipation aluminum plate (31) is fixedly provided with the control box (4); one end of the control box (4) is connected with a power line (32), the other end is connected with two signal lines (33), one signal line (33) is connected with the terminal portion (6) of the radar sensor (5) through a first wiring terminal (34), and the other signal line (33) is connected with the lamp panel (2) through a second wiring terminal (35); the lamp panel cavity (16) and the power supply cavity (17) are in communication and provided with a wire-through pipe (36) through which the power supply line passes; The outer side of the power supply mounting groove (30) is provided with a sealing wall (37), the sealing wall (37) and the side wall of the power supply mounting groove (30) form a clamping groove, and the clamping groove is provided with a second sealing ring (38); the inner side of the cover shell (29) is provided with a ring of pressing walls (39) for pressing the second sealing ring (38), the cover shell (29) is provided with a mounting hole, and the terminal portion (6) is fixedly arranged on the mounting hole.

10. The energy saving street light of claim 9, wherein: Further comprising a mounting handle (40) connected with the lamp post, the lower end of the cover shell (29) is provided with a matching groove (41), a plurality of first limiting strips (42) are arranged on the middle portion of the bottom surface of the matching groove (41), fixing holes (43) are arranged on the two sides of the bottom surface of the matching groove (41), the middle portion of the bottom surface of the matching groove (41) is further provided with a wire-through hole (44) through which the power line (32) passes, and a wire-through seat (45) is fixedly arranged on the wire-through hole (44); the mounting handle (40) comprises an arc-shaped block (46) arranged in the matching groove (41), waist-shaped holes (47) corresponding to the fixing holes (43) are arranged on the two sides of the arc-shaped block (46), a through hole (48) corresponding to the wire-through hole (44) is arranged on the middle portion of the arc-shaped block (46), and a second limiting strip (49) for limiting the first limiting strip (42) is arranged on the inner end surface of the arc-shaped block (46).

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