Wind and rain resistant brush for photoelectric equipment

Abstract

The invention discloses a wind and rain resistant brush for photoelectric equipment, and belongs to the technical field of photoelectric equipment. The wind-resistant pressing plate set and the slider-crank mechanism are installed at the upper end and the lower end of the optical window frame respectively, the slider-crank mechanism is connected with one end of the wiper arm set, the other end of the wiper arm set is located below the wind-resistant pressing plate set, and the digital steering engine drives the slider-crank mechanism to convert rotation into horizontal movement. The wiper arm group is parallel to a pair of frames of the optical window; a wiper blade group is fixed at the lower end of the wiper arm group; the wind-resistant pressing plate group limits the movement of the non-fixed end of the windscreen wiper arm group in the direction perpendicular to the mirror surface; the steering engine controller controls the rotation angle position, the rotation angle range, the rotation speed and the intermittent time of the digital steering engine. The windscreen wiper device can effectively prevent the windscreen wiper mechanism and the windscreen wiper blade from being blown up by strong wind, and the working reliability of the windscreen wiper device under the strong wind and strong air convection condition generated by high-speed movement is improved.

Description

Technical Field

[0001] The invention relates to the technical field of optoelectronic equipment, and in particular to an anti-wind and rain brush for optoelectronic equipment. Background Art

[0002] With the rapid development of optoelectronic technology, optoelectronic equipment has been widely used in urban monitoring, traffic management, military reconnaissance, etc. In order to prevent rain and snow from being trapped on the optical window glass and affecting the optoelectronic image, many optoelectronic equipment used in outdoor open-air environments are equipped with wipers.

[0003] Traditional windshield wipers for optoelectronic devices have problems such as incomplete wiping, large blind areas for wiping, obstructions that affect image observation, inability to adjust the frequency and interval time of wiping, and inability to withstand strong winds. Many optical window covers of optoelectronic devices are nearly rectangular, and there are pressure-covering protrusions around the optical window glass. Traditional windshield wipers that wipe the wind in a rotating and swinging manner cannot effectively fit the wiper blades to the glass surface due to the influence of the pressure-covering protrusions around them, and the blind areas for wiping the wind are large. In a windy environment or when the carrier is in high-speed motion, the wiper arm and flexible wiper blade of the wiper device are subject to large wind forces. The wiper arm of a traditional wiper device is connected to a single-end drive mechanism, which can easily cause the flexible wiper blades to fail to fit the window glass surface and fail to effectively remove rain and snow in strong winds. In severe cases, the transmission mechanism may be damaged and fail to work normally. Summary of the invention

[0004] In view of this, the present invention provides a windshield-resistant wiper for photoelectric equipment, which can effectively fit the wiper blade to the glass surface and reduce the blind area of ​​wiping rain, effectively prevent the wiper mechanism and the wiper blade from being blown away by strong winds, and improve the reliability of the wiper device under strong air convection conditions generated by strong winds and high-speed movement.

[0005] A wind and rain resistant wiper for photoelectric equipment, comprising a digital servo, a crank slider mechanism, a wiper arm group, a wiper blade group, a wind resistant pressure plate group and a servo controller;

[0006] The anti-wind pressure plate group and the crank slider mechanism are respectively installed at the upper and lower ends of the optical window frame, the crank slider mechanism is connected to one end of the wiper arm group, and the other end of the wiper arm group is located below the anti-wind pressure plate group, and the digital servo drives the crank slider mechanism to convert rotation into horizontal motion, thereby driving the wiper arm group fixed thereto to move back and forth parallel to a pair of frames of the optical window; a wiper blade group is fixed to the lower end of the wiper arm group, and the flexible wiper blade in the wiper blade group contacts the surface of the optical window through the left and right translational motion; the anti-wind pressure plate group installed on the top frame of the optical window presses the rolling steel ball on the non-fixed end of the wiper arm group through the pressure plate; the servo controller controls the rotation angle position, rotation angle range, rotation speed and intermittent time of the digital servo, so that the wiper device adjusts the wiper frequency and intermittent time according to the amount of rainfall.

[0007] Furthermore, the crank slider mechanism comprises a frame, a crank, a connecting rod and a slider;

[0008] The frame is a fixed component that provides basic support for the mechanism, and is provided with a guide rail that cooperates with the slider and a fixed installation interface of the digital servo; the crank is connected to the rotating shaft of the digital servo, and drives the slider to move through a connecting rod; the connecting rod connects the crank and the slider to realize the conversion from rotational motion to linear motion; the slider performs reciprocating linear motion on the frame guide rail.

[0009] Further, the wiper arm assembly includes a wiper arm and a steel ball;

[0010] The wiper arm is fixedly connected to the slider of the crank slider mechanism, and the slider drives the wiper arm group to perform left and right translation reciprocating motion; when the wiper device is installed, the wiper arm is parallel to a pair of frames of the nearly rectangular optical window, and the movement trajectory of the wiper arm is a left and right reciprocating motion parallel to the pair of frames of the optical window.

[0011] Furthermore, the wiper blade assembly includes a wiper bracket and a flexible wiper blade. The wiper blade assembly is fixed to the wiper arm by screws. The wiper device scrapes off rain and snow on the optical window by the left-right translation movement of the flexible wiper blade.

[0012] Furthermore, the non-fixed end of the wiper arm is provided with a mounting hole for a steel ball, and a ring-shaped groove is processed along the edge of the mounting hole. After the steel ball is placed in the mounting hole, a rolling process is used to prevent the steel ball from falling out, while allowing it to rotate flexibly in the hole; the anti-wind pressure plate group includes a plurality of studs, pressure plates and screws, and the pressure plate is fixed to the pressure cover of the optical window by the studs and screws. The pressure plate of the anti-wind pressure plate group presses the rolling steel ball on the wiper arm group to realize the wind-resistant function.

[0013] Furthermore, the servo controller is the control center for driving the servo, and its function is to control the speed, steering, start and stop of the servo, protect the motor from damage, and monitor the operating status of the servo; the servo controller selects the wiper frequency and interval time according to the amount of rain; the control circuit of the servo controller is composed of a CPU controller and its peripheral circuits, and the CPU timer is configured in PWM working mode. The CPU receives the control command sent by the remote control through the RS485 communication port with electromagnetic isolation, calculates the duty cycle according to the command, and uses the PWM working mode of the timer to generate a PWM (pulse width modulation) signal consistent with the servo angle. The PWM signal controls the servo after being isolated by an optical coupler and driven by the circuit; in order to prevent the transmission mechanism of the wiper device from getting stuck, causing the servo to stall and the internal gear set to be damaged, a Hall current sensor is designed to detect the servo power supply current circuit. When the servo current exceeds the set value, the CPU controller cuts off the servo power supply current by controlling the MOS switch; a failure of the wiper transmission mechanism will cause the power supply voltage to be lowered, and the servo control circuit board detects the amplitude of the system power supply voltage in real time. If the system power supply voltage is found to be lower than the set value, the servo is controlled to stop working, isolate the fault, and ensure the normal operation of other systems of the wiper device.

[0014] Beneficial effects:

[0015] 1. The present invention adopts a crank slider mechanism to connect one end of the wiper arm group, and the other end is limited by the wind pressure resistance plate group to limit the freedom of the wiper arm group to flip outward, so that the wiper blade can effectively fit with the surface of the optical window glass, and can more effectively remove water stains, snow and dirt on the surface of the optical window glass, thereby improving the cleaning effect.

[0016] 2. In the present invention, when wiping the rain, the wiper arm and the wiper blade translate parallel to a pair of frames of the optical window, which less blocks the incident light on the optical window of the optoelectronic device and has little impact on the optoelectronic image or detection performance, thereby improving the detection capability of the optoelectronic device under severe weather conditions such as rain and snow.

[0017] 3. The servo controller of the present invention controls the rotation angle position, rotation angle range, rotation speed and intermittent time of the digital servo, so that the wiper device can select the wiper frequency and intermittent time according to the amount of rainfall, which not only ensures the wiper effect but also reduces the obstruction of vision by wipers.

[0018] 4. The wiper blade of the present invention can cover the effective aperture of the optical window when wiping the rain, and the blind area of ​​wiping the rain is small, and the cleaning effect is good.

[0019] 5. The present invention installs a steel ball at the non-fixed end of the wiper arm, and the pressure plate of the anti-wind pressure plate group presses the rolling steel ball on the wiper arm group to achieve wind resistance, which can effectively prevent the wiper mechanism and the wiper blade from being blown away by strong winds, and improve the reliability of the wiper device under strong air convection conditions caused by strong winds and high-speed movement.

[0020] 6. The control circuit of the steering gear controller of the present invention is composed of a CPU controller and its peripheral circuits. The CPU timer is configured in PWM working mode. The CPU receives control instructions sent by the remote control through the RS485 communication port with electromagnetic isolation, calculates the duty cycle according to the instructions, and uses the PWM working mode of the timer to generate a PWM (pulse width modulation) signal consistent with the steering gear angle. The PWM signal controls the operation of the steering gear after being isolated by an optical coupler and a driving circuit. It can automatically detect and isolate the fault of the wiper device transmission mechanism, and automatically cut off the power supply to the steering gear when a fault is found, thereby ensuring that the electrical system of the steering gear works reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention (the wiper is close to the left frame);

[0022] Figure 2 It is a three-dimensional diagram of the overall structure of the present invention (the wiper is in the middle position);

[0023] Figure 3 It is a three-dimensional diagram of the overall structure of the present invention (the wiper is on the right frame);

[0024] Figure 4 This is the appearance diagram of the waterproof digital servo of the present invention;

[0025] Figure 5 It is the structural diagram of the crank slider mechanism of the present invention (including the digital steering gear);

[0026] Figure 6 It is a structural diagram of the wiper arm assembly of the present invention;

[0027] Figure 7 is a structural diagram of a wiper blade assembly of the present invention;

[0028] Figure 8 This is a circuit diagram of the steering gear controller of the present invention;

[0029] Fig. 9 The figure is a physical diagram of the electrical connection between a digital servo and a servo controller according to an embodiment of the present invention.

[0030] In the figure: 1-digital servo; 101-servo shaft; 2-crank slider mechanism; 201-frame; 20101-guide rail; 202-crank; 203-connecting rod; 204-slider; 3-wiper arm assembly; 301-wiper arm; 30101-annular groove; 302-steel ball; 4-wiper blade assembly; 401-wiper bracket; 402-flexible wiper blade; 5-anti-wind pressure plate assembly; 501-stud; 502-pressure plate; 503-screw; 6-servo controller; 7-optical window. DETAILED DESCRIPTION

[0031] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0032] As attached Figure 1-3 As shown, the present invention provides an anti-wind and rain wiper for a photoelectric device, comprising a digital servo 1, a crank slider mechanism 2, a wiper arm group 3, a wiper blade group 4, an anti-wind pressure plate group 5 and a servo controller 6. The digital servo 1 drives the crank 202 of the crank slider mechanism 2 to rotate; the crank 202 drives the connecting rod 203 and pulls the slider 204 on the linear guide rail 20101 of the frame 201 to make a reciprocating motion of left and right translation; the slider 204 drives the wiper arm group 3 fixed thereto to move back and forth parallel to a pair of frames of the optical window 7; the wiper blade group 4 is fixed at the lower end of the wiper arm group 3, and the rain and snow on the surface of the optical window 7 are scraped off by the left and right translation movement of the flexible wiper blade 402 in the wiper blade group 4; the windproof pressure plate group 5 installed on the top frame of the optical window 7 presses the rolling steel ball 302 on the non-fixed end of the wiper arm group 3 through the pressure plate 502 to prevent the wind from blowing up the wiper blade 401; the servo controller 6 controls the rotation angle position, rotation angle range, rotation speed and intermittent time of the digital servo 1, so that the wiper device can select the wiper frequency and intermittent time according to the amount of rainfall.

[0033] In the preferred embodiment, the driving motor of the wiper device adopts a digital servo 1 with a sealed and waterproof structure. The digital servo 1 can provide a large driving torque, can accurately control the rotation angle of the motor shaft, provide high precision and fast response speed, and can maintain the specified position by sending a PWM signal once. Figure 4 As shown, the waterproof digital servo 1 is mainly composed of a servo waterproof housing, a DC motor, a reduction box, an encoder, an electronic control unit and a power supply, which are integrated into an integrated structure. Its working principle is to receive instructions from the servo controller, process and calculate through its internal electronic control unit, control the speed and direction of the DC motor, and then control the rotation position of the servo.

[0034] In the preferred embodiment, as shown in the attached Figure 6 As shown, the transmission mechanism adopts a crank slider mechanism 2, including a frame 201, a crank 202, a connecting rod 203 and a slider 204. The frame 201 is a fixed component, providing basic support for the mechanism, and is provided with a guide rail 20101 that cooperates with the slider 204 and a fixed installation interface of the digital servo 1; the crank 202 is connected to the rotating shaft 101 of the digital servo 1, and drives the slider 204 to move through the connecting rod 203; the connecting rod 203 connects the crank 202 and the slider 204 to realize the conversion from rotational motion to linear motion; the slider 204 performs reciprocating linear motion on the frame guide rail 20101.

[0035] In the preferred embodiment, as shown in the attached Figure 6As shown, the wiper arm assembly 3 includes a wiper arm 301 and a steel ball 302. The wiper arm 3 is fixedly connected to the slider 204 of the crank slider mechanism 2. The slider 204 drives the wiper arm assembly 3 to move back and forth. When installing the wiper device, the wiper arm 301 is parallel to a pair of frames of the nearly rectangular optical window 7. The movement trajectory of the wiper arm 301 is a left and right reciprocating translation movement parallel to the pair of frames of the optical window 7. As shown in the attached figure, Figure 7 As shown, the wiper blade assembly 4 includes a wiper bracket 401 and a flexible wiper blade 402, and the wiper blade assembly 4 is fixed to the wiper arm 301 by screws. The wiper device scrapes off rain and snow on the optical window 7 by the left-right translation movement of the flexible wiper blade 402.

[0036] In the preferred embodiment, the non-fixed end of the wiper arm 301 has a mounting hole for the steel ball 302, and a circle of annular grooves 30101 are processed along the edge of the mounting hole. After the steel ball is placed in the rear mounting hole, the steel ball 302 is prevented from falling out through the rolling process, and can rotate flexibly in the hole. The wind-resistant pressure plate group 5 includes a plurality of special studs 501, a pressure plate 502 and a screw 503. The pressure plate 502 is fixed to the pressure cover of the optical window 7 through the special studs 501 and the screws 503. The pressure plate 502 of the wind-resistant pressure plate group 5 presses the rolling steel ball 302 on the wiper arm group 3 to achieve the wind-resistant function.

[0037] In the preferred embodiment, the steering gear controller 6 is the control center for driving the steering gear 1, and its main functions are to control the speed, direction, start and stop of the steering gear 1, protect the motor from damage, monitor the operating status of the steering gear 1, etc. The steering gear controller 6 can select the frequency and interval time of windshield wipers according to the amount of rain. Figure 8 As shown, the control circuit is mainly composed of a CPU controller and its peripheral circuits. The CPU timer is configured in PWM working mode. The CPU receives the control instructions sent by the remote control through the RS485 communication port with electromagnetic isolation. According to the instructions, the duty cycle is calculated, and the PWM working mode of the timer is used to generate a PWM (pulse width modulation) signal consistent with the steering gear angle. The PWM signal is isolated by an optical coupler and drives the circuit to control the steering gear. In order to prevent the transmission mechanism of the wiper device from getting stuck, causing the steering gear to be blocked and the internal gear set to be damaged, a Hall current sensor is designed to detect the steering gear power supply current circuit. When the steering gear current exceeds the set value, the CPU controller cuts off the steering gear power supply current by controlling the MOS switch. Failure of the wiper transmission mechanism will cause the power supply voltage to be pulled down. The steering gear control circuit board detects the amplitude of the system power supply voltage in real time. If the system power supply voltage is found to be lower than the set value, the steering gear is controlled to stop working, the fault is isolated, and the normal operation of other systems of the wiper device is ensured.

[0038] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind and rain resistant brush for photoelectric equipment, characterized in that: It includes a digital servo, a crank slider mechanism, a wiper arm assembly, a wiper blade assembly, a wind pressure plate assembly and a servo controller; The anti-wind pressure plate group and the crank slider mechanism are respectively installed at the upper and lower ends of the optical window frame, the crank slider mechanism is connected to one end of the wiper arm group, and the other end of the wiper arm group is located below the anti-wind pressure plate group, and the digital servo drives the crank slider mechanism to convert rotation into horizontal motion, thereby driving the wiper arm group fixed thereto to move back and forth parallel to a pair of frames of the optical window; a wiper blade group is fixed to the lower end of the wiper arm group, and the flexible wiper blade in the wiper blade group contacts the surface of the optical window through the left and right translational motion; the anti-wind pressure plate group installed on the top frame of the optical window presses the rolling steel ball on the non-fixed end of the wiper arm group through the pressure plate; the servo controller controls the rotation angle position, rotation angle range, rotation speed and intermittent time of the digital servo, so that the wiper device adjusts the wiper frequency and intermittent time according to the amount of rainfall.

2. The anti-weather wiper for photovoltaic equipment according to claim 1, characterized in that: The crank slider mechanism comprises a frame, a crank, a connecting rod and a slider; The frame is a fixed component that provides basic support for the mechanism, and is provided with a guide rail that cooperates with the slider and a fixed installation interface of the digital servo; the crank is connected to the rotating shaft of the digital servo, and drives the slider to move through a connecting rod; the connecting rod connects the crank and the slider to realize the conversion from rotational motion to linear motion; the slider performs reciprocating linear motion on the frame guide rail.

3. The anti-weather wiper for photovoltaic equipment according to claim 2, characterized in that: The wiper arm assembly comprises a wiper arm and a steel ball; The wiper arm is fixedly connected to the slider of the crank slider mechanism, and the slider drives the wiper arm group to perform left and right translation reciprocating motion; when the wiper device is installed, the wiper arm is parallel to a pair of frames of the nearly rectangular optical window, and the movement trajectory of the wiper arm is a left and right reciprocating motion parallel to the pair of frames of the optical window.

4. The anti-weather wiper for photovoltaic equipment according to claim 3, characterized in that: The wiper blade assembly comprises a wiper bracket and a flexible wiper blade. The wiper blade assembly is fixed to a wiper arm by screws. The wiper device scrapes off rain and snow on the optical window by the left-right translation movement of the flexible wiper blade.

5. The anti-weather wiper for photovoltaic equipment according to claim 4, characterized in that: The non-fixed end of the wiper arm is provided with a mounting hole for a steel ball, and a ring groove is processed along the edge of the mounting hole. After the steel ball is placed in the rear mounting hole, a rolling process is used to prevent the steel ball from falling out, while allowing it to rotate flexibly in the hole; the anti-wind pressure plate group includes a plurality of studs, pressure plates and screws, and the pressure plate is fixed to the pressure cover of the optical window by the studs and screws. The pressure plate of the anti-wind pressure plate group presses the rolling steel ball on the wiper arm group to achieve wind-resistant function.

6. The wind and rain resistant wiper for photovoltaic equipment according to claim 4 or 5, characterized in that: The servo controller is the control center for driving the servo, and its function is to control the speed, steering, start and stop of the servo, protect the motor from damage, and monitor the operating status of the servo; the servo controller selects the wiper frequency and interval time according to the amount of rain; the control circuit of the servo controller is composed of a CPU controller and its peripheral circuits, and the CPU timer is configured in PWM working mode. The CPU receives the control instructions sent by the remote control through the RS485 communication port with electromagnetic isolation, calculates the duty cycle according to the instructions, and uses the PWM working mode of the timer to generate a PWM (pulse width modulation) signal consistent with the servo angle. The PWM signal controls the servo after being isolated by an optical coupler and driven by the circuit; when the servo current exceeds the set value, the CPU controller cuts off the servo power supply current by controlling the MOS switch; the servo control circuit board detects the amplitude of the system power supply voltage in real time, and if it finds that the system power supply voltage is lower than the set value, it controls the servo to stop working, isolates the fault, and ensures the normal operation of other systems of the wiper device.

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