CN112180387A - Laser ranging sensor for automobile collision avoidance - Google Patents
Laser ranging sensor for automobile collision avoidance Download PDFInfo
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- CN112180387A CN112180387A CN202011048850.0A CN202011048850A CN112180387A CN 112180387 A CN112180387 A CN 112180387A CN 202011048850 A CN202011048850 A CN 202011048850A CN 112180387 A CN112180387 A CN 112180387A
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- Prior art keywords
- laser
- range finder
- ranging sensor
- supporting
- rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
- B60R19/483—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds with obstacle sensors of electric or electronic type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0001—Arrangements for holding or mounting articles, not otherwise provided for characterised by position
- B60R2011/004—Arrangements for holding or mounting articles, not otherwise provided for characterised by position outside the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
- B60R2011/008—Adjustable or movable supports
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention relates to the technical field of distance measuring sensors and discloses a laser distance measuring sensor for automobile collision avoidance, which comprises a laser distance measuring instrument body and a mounting plate, wherein baffles are respectively arranged on the front side surface and the rear side surface of the laser distance measuring instrument body, positioning blocks are respectively and fixedly mounted at four corners of each baffle, one surface of each positioning block, which is close to the center of the laser distance measuring instrument body, is provided with an inserting hole, and the front side surface of the mounting plate is fixedly provided with a supporting block. According to the invention, the deflector rod is moved towards the rear side, when the front end of the push block is positioned in the middle of the two ejector rods, the elasticity of the second spring drives the ejector rods to retract towards the inside of the supporting block through the extension plate, so that the parts of the ejector rods extending out of the supporting block are all retracted into the supporting block, and the laser range finder body can be directly taken out from the middle of the supporting block, so that the laser range finder body is conveniently disassembled, the labor intensity of operators is reduced, and the practicability of the device is increased.
Description
Technical Field
The invention relates to the technical field of distance measuring sensors, in particular to a laser distance measuring sensor for automobile collision avoidance.
Background
The laser ranging sensor is characterized in that a laser diode is aligned with a target to emit laser pulses, the laser pulses are scattered in all directions after being reflected by the target, part of scattered light returns to a sensor receiver and is imaged on an avalanche photodiode after being received by an optical system, the avalanche photodiode is an optical sensor with an amplifying function inside, so that the laser ranging sensor can detect extremely weak optical signals, record and process the time from the emission of the optical pulses to the return of the optical pulses to be received, and can measure the distance of the target, at present, an automobile is gradually an important trip tool in daily trips of people, the incidence rate of rear-end accidents of traffic is continuously increased along with the popularization of the automobile, in order to reduce the incidence rate of the rear-end accidents of traffic, a laser ranging device is arranged in front of the automobile for monitoring, and when the laser ranging sensor detects that the automobile is positioned in a safe distance, the laser ranging sensor can send alarm information through the vehicle-mounted computer, so that a driver is reminded to slow down and keep a vehicle distance, and the occurrence rate of rear-end accidents of the vehicle is reduced.
The embedded installation is adopted mostly to current laser ranging sensor, install on the preceding crashproof roof beam of car mostly, need operating personnel to go into the draw-in groove that the automobile body was reserved with laser ranging sensor card in the installation, but when the car is produced, if meet the condition of data brush write failure among the laser ranging sensor, need dismantle the change to laser ranging sensor, and the bayonet mounting means of laser ranging sensor, make the gap between laser ranging sensor and the installation draw-in groove very little, when dismantling, need use dedicated instrument just can warp laser ranging sensor, the operation is complicated, operating personnel's intensity of labour has been improved, the production efficiency of car has been reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the laser ranging sensor for the collision avoidance of the automobile, which has the advantages of being convenient to disassemble, reducing the labor intensity of operators, increasing the practicability of the device and solving the problems in the background technology.
The invention provides the following technical scheme: the utility model provides a laser rangefinder sensor for car anticollision, includes laser rangefinder body and mounting panel, the baffle has all been placed to the leading flank and the trailing flank of laser rangefinder body, the equal fixed mounting of four corners of baffle has the locating piece, the spliced eye has been seted up to the one side that the locating piece is close to laser rangefinder body center, the leading flank fixed mounting of mounting panel has the supporting shoe, movable chamber has been seted up at the middle part of supporting shoe, the inner chamber trailing flank fixed mounting in movable chamber has spring one, the other end fixed mounting of spring one has the ejector pad, the inner chamber swing joint in movable chamber has the ejector pin, the right-hand member fixed mounting of ejector pin has the extension board, the one side fixed mounting that the ejector pad was kept away from to the.
The rear side face of the laser range finder body is fixedly provided with heat conducting fins, the rear side face of the laser range finder body is connected with a fan in a transmission mode, the fan is located on the rear side of the heat conducting fins and is not in contact with the heat conducting fins, the number of the heat conducting fins is four, the four heat conducting fins are distributed at equal intervals, and mounting holes are formed in four corners of the surface of the mounting plate.
The baffle plate comprises a baffle plate, a supporting block and a positioning groove, wherein the left end and the right end of the baffle plate are both provided with the positioning groove, the height value of the positioning groove is equal to that of the supporting block, and the supporting block is movably connected in the positioning groove.
The middle part of the supporting block is provided with a connecting cavity, the other end of the second spring is fixedly installed on one surface, far away from the push block, of the inner cavity of the connecting cavity, a shifting lever is fixedly installed on the right side surface of the push block, one surface, far away from the center of the laser range finder body, of the supporting block is provided with a yielding groove, the shifting lever is movably connected in the yielding groove, the length value of the yielding groove is equal to that of the push block, and the right end of the shifting lever penetrates through the right side of the supporting block and extends to the right side of.
The cross section of the ejector rod extending out of the supporting block is triangular, and one end of the ejector rod extending out of the supporting block is clamped in the inserting hole.
The connecting cavities are two in number and are respectively located above and below the push block, and the right side of the movable cavity is communicated with the abdicating groove.
The push block is composed of two right trapezoid and a rectangle, and the ejector rod is located above and below the two right trapezoid of the push block.
The laser ranging sensor for automobile collision avoidance further comprises a storage adjusting device;
the rear end of the accommodating and adjusting device is fixedly connected to the front part of the mounting plate, the front end of the accommodating and adjusting device is fixedly connected to the rear part of the supporting block, and the rear end face of the laser range finder body is located at the front end of the accommodating and adjusting device;
the accommodating and adjusting device comprises a support column and a support table;
the front end surface of the mounting plate is provided with a mounting groove, the rear end of the support column is fixedly connected to the bottom of the mounting groove, and the front end of the support column is fixedly connected to the rear end surface of the support table;
the front end face of the supporting table is supported with a limiting table, the front end of the limiting table is fixedly connected with the rear end of the supporting block, and the rear end face of the laser range finder body is positioned at the front end of the limiting table;
the rear end of the support table is hinged with one end of a first inclined rod;
the other end of the first diagonal rod is hinged with a second diagonal rod, and the second diagonal rod is an electric telescopic rod;
the other end of the second inclined rod is hinged with a supporting rod;
one end of the supporting arm and one end of the connecting rod are hinged above the supporting rod;
the other end of the supporting arm, which is far away from the supporting rod, is rotatably connected to the side of the supporting table;
the other end of the connecting rod is hinged on the base;
the front end of the base is connected to the rear end of the limiting table in a sliding mode, the rear end of the limiting table is located on one side of the base and is provided with a limiting plate, and the limiting plate is used for limiting the sliding of the base.
The laser ranging sensor for automobile collision avoidance further comprises a time detection device, an electro-optic modulator, a control device and an alarm;
the time detection device is used for measuring the time length from the laser emitting to the laser receiving of the laser range finder body;
the electro-optical modulator (or other laser modulation rate detection device) is used for detecting the laser modulation rate of the laser emitted by the laser ranging sensor body;
the first detection device is arranged on the laser ranging sensor body and used for detecting the laser refractive index of the environment where the laser ranging sensor body is located;
the controlling means with time detection device, electro-optical modulator, first detection device, alarm and laser range finder body electricity is connected, controlling means is based on time detection device, electro-optical modulator, first detection device control the alarm work includes:
step 1: the corrected time length delta psi can be calculated based on the laser modulation rate of the laser emitted by the laser ranging sensor body detected by the electro-optic modulator;
eta is the laser modulation rate when the electro-optical modulator detects the laser, psi is the refractive index of the optical fiber of the environment detected by the first detection device, T is the detection value of the time detection device, exp is a natural constant, the value is 2.72, and the total error is the total error of the electro-optical modulator, the time detection device and the first detection device; psi0For presetting a reference refractive index, eta, of the optical fiber0A preset reference laser modulation rate is set;
step 2: calculating the distance between the laser range finder body and the measured object based on the step 1 and the formula (2);
measured distance
d represents the distance between the laser range finder body and the measured object, c represents the propagation speed of light in the air, ln is a natural logarithm, f (t) is a function of the laser modulation rate of the laser ranging sensor body emitted laser along with the change of time t, which is obtained by an electro-optical modulator, f (t)0(t) is a function of the preset laser modulation rate of the laser emitted by the ranging sensor body along with the change of time t;
expressed as integrating f (t),
is expressed as a pair f0(t) integrating, dt being the derivative of the independent variable t;
and when the difference value between the distance from the laser range finder body to the measured object and the braking safety distance of the automobile calculated in the step 2 is smaller than the preset minimum allowable difference value, the control device controls the alarm to give an alarm. Compared with the prior art, the invention has the following beneficial effects:
1. according to the laser range finder, the second spring is fixedly arranged between the extension plate and the connecting cavity, the elasticity of the second spring provides the extension plate with a tendency of moving towards the center of the supporting block, one opposite surface of the two ejector rods is in contact with the push block, the driving rod is arranged at the right end of the push block and moves towards the rear side, when the front end of the push block is positioned in the middle of the two ejector rods, the elasticity of the second spring drives the ejector rods to retract towards the inside of the supporting block through the extension plate, so that the parts of the ejector rods extending out of the supporting block are all retracted into the supporting block, and the laser range finder body can be directly taken out from the middle of the supporting block, so that the laser range finder body is convenient to disassemble, the labor intensity of operators is.
2. According to the invention, the heat conducting sheet is arranged on the rear side surface of the laser range finder body, the heat conducting sheet is made of metal materials with good heat conducting performance, and heat generated during the working of the laser range finder body is absorbed, so that the heat generated during the working time of the laser range finder body can be quickly conducted to the heat conducting sheet, and the heat on the surface of the heat conducting sheet is radiated through the rotation of the fan, so that the laser range finder body has a good radiating effect, the temperature of the laser range finder body during the working is reduced, and the service life of the laser range finder body is prolonged.
3. According to the invention, the positioning grooves are formed in the two sides of the baffle plate, when the laser range finder body is arranged in the middle of the supporting block, the upper surface and the lower surface of each positioning groove are aligned with the upper surface and the lower surface of each supporting block, at the moment, the baffle plate can be quickly pushed to the middle of each supporting block, and the cross section of one end, extending out of the supporting block, of the ejector rod is triangular, so that the baffle plate is in contact with the inclined surface of one end, extending out of the supporting block, of the ejector rod when the baffle plate is pushed in, the positioning block automatically compresses the ejector rod.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a fan assembly according to the present invention;
FIG. 3 is a schematic view of the connection of the structural baffles of the present invention;
FIG. 4 is a schematic cross-sectional view of a structural active lumen of the present invention;
FIG. 5 is a schematic view of the structure of the deflector rod of the present invention;
fig. 6 is a schematic connection diagram of the storage adjustment device of the present invention.
In the figure: 1. a laser rangefinder body; 2. mounting a plate; 3. a baffle plate; 4. positioning blocks; 5. inserting holes; 6. a support block; 7. positioning a groove; 8. a movable cavity; 9. a first spring; 10. a push block; 11. a top rod; 12. an extension plate; 13. a second spring; 14. a connecting cavity; 15. a deflector rod; 16. a yielding groove; 17. a heat conductive sheet; 18. a fan; 19. mounting holes; 21. a support pillar; 22. a support table; 23. a limiting table; 24. a first diagonal member; 25. a second diagonal member; 26. a base; 27 a limit plate; 28. a support arm; 29. a connecting rod; 30. a support rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1-5, a laser rangefinder sensor for automobile anticollision, including laser rangefinder body 1 and mounting panel 2, baffle 3 has all been placed to the leading flank and the trailing flank of laser rangefinder body 1, the equal fixed mounting of four corners of baffle 3 has locating piece 4, spliced eye 5 has been seted up to the one side that locating piece 4 is close to laser rangefinder body 1 center, the leading flank fixed mounting of mounting panel 2 has supporting shoe 6, movable chamber 8 has been seted up at the middle part of supporting shoe 6, the inner chamber trailing flank fixed mounting in movable chamber 8 has spring one 9, the other end fixed mounting of spring one 9 has ejector pad 10, the inner chamber swing joint in movable chamber 8 has ejector pin 11, the right-hand member fixed mounting of ejector pin 11 has extension board 12, the one side fixed mounting that extension board 12 kept away from ejector pad 10 has spring two.
Wherein, the rear side of the laser range finder body 1 is fixedly provided with a heat conducting fin 17, the rear side of the laser range finder body 1 is in transmission connection with a fan 18, the fan 18 is positioned at the rear side of the heat conducting fin 17, the fan 18 is not in contact with the heat conducting fin 17, the heat conducting fins 17 are four in number, the four heat conducting fins 17 are distributed at equal intervals, the four corners of the surface of the mounting plate 2 are respectively provided with a mounting hole 19, the mounting holes 19 are fixedly mounted at the mounting positions on the vehicle body through bolts to fix the device, the heat conducting fins 17 are mounted on the rear side of the laser range finder body 1, the heat conducting fins 17 are made of metal materials with good heat conducting performance, the heat generated by the laser range finder body 1 during working is absorbed, so that the heat generated by the working time of the laser range finder body 1 can be rapidly conducted to the heat conducting fins 17, and the heat on, make laser range finder body 1 have good radiating effect, reduced the temperature of laser range finder body 1 during operation, increased laser range finder body 1's life.
Wherein, the left and right ends of the baffle 3 are both provided with positioning grooves 7, the height value of the positioning grooves 7 is equal to the height value of the supporting blocks 6, the supporting blocks 6 are movably connected in the positioning grooves 7, and the upper and lower surfaces of the positioning grooves 7 are aligned with the upper and lower surfaces of the two supporting blocks 6 when the laser range finder body 1 is arranged in the middle of the supporting blocks 6 by arranging the positioning grooves 7 on the two sides of the baffle 3.
Wherein, the connection chamber 14 has been seted up at the middle part of supporting shoe 6, the one side that ejector pad 10 was kept away from to the other end fixed mounting of two 13 springs is connected the 14 inner chambers of chamber, the right flank fixed mounting of ejector pad 10 has driving lever 15, the one side that laser range finder body 1 center was kept away from to supporting shoe 6 has seted up the groove of stepping down 16, driving lever 15 swing joint is in the groove of stepping down 16, the length value in groove of stepping down 16 equals the length value of ejector pad 10, the right-hand member of driving lever 15 runs through and extends to the right side of supporting shoe 6, the groove of stepping down 16 provides the free space for driving lever 15's motion, the back-and-.
The section of the ejector rod 11 extending out of the supporting block 6 is triangular, one end of the ejector rod 11 extending out of the supporting block 6 is clamped in the plug-in hole 5, the baffle 3 is rapidly pushed to the middle of the supporting block 6, and the section of the ejector rod 11 extending out of one end of the supporting block 6 is triangular, so that the baffle 3 and the ejector rod 11 are in inclined surface contact with each other when the baffle 3 is pushed in, and the positioning block 4 automatically compresses the ejector rod 11.
Wherein, connect chamber 14 totally two, two connect chamber 14 and be located the top and the below of ejector pad 10 respectively, the right side and the groove 16 intercommunication of stepping down of activity chamber 8, connect chamber 14 and provide the space for the up-and-down motion of extension board 12 and the installation of second spring 13, guaranteed the stability of device operation.
Wherein, ejector pin 10 comprises two right trapezoid and a rectangle, ejector pin 11 is located two right trapezoid's of ejector pin 10 top and below, the elasticity of two springs 13 provides the trend to the 6 central motions of supporting shoe for extension board 12, make two ejector pin 11 relative one sides and ejector pin 10 contact, when ejector pin 10 front end is located two ejector pin 11 middle parts, the elasticity of two springs 13 drives ejector pin 11 through extension board 12 and contracts to the supporting shoe 6 is inside, make ejector pin 11 stretch out in the supporting shoe 6 outside part is whole to be received in the supporting shoe 6, can directly take out laser range finder body 1 from supporting shoe 6 middle part this moment, thereby realize conveniently dismantling laser range finder body 1, operating personnel's intensity of labour has been reduced.
The working principle is as follows: when the device is used, the positioning grooves 7 are arranged on the two sides of the baffle plate 3, when the laser range finder body 1 is arranged in the middle of the supporting blocks 6, the upper and lower surfaces of the positioning grooves 7 are aligned with the upper and lower surfaces of the two supporting blocks 6, at the moment, the baffle plate 3 can be quickly pushed to the middle of the supporting blocks 6, the cross section of one end of the ejector rod 11, which extends out of the supporting blocks 6, is triangular, when the baffle plate 3 is pushed in, the baffle plate 3 is in contact with the inclined surface of one end of the ejector rod 11, which extends out of the supporting blocks 6, so that the positioning block 4 automatically compresses the ejector rod 11, when the ejector rod 11 moves to the lower part of the inserting hole 5, the deflector rod 15 is moved forwards in the abdicating groove 16, the ejector block 10 pushes the two ejector rods 11 out of the top end and the bottom end of the supporting blocks 6 and is inserted in the inserting hole 5, so as, the heat conducting sheet 17 is made of metal material with good heat conducting performance, heat generated by the laser range finder body 1 during working is absorbed, so that the heat generated by the laser range finder body 1 during working can be quickly conducted to the heat conducting sheet 17, the heat on the surface of the heat conducting sheet 17 is dissipated through the rotation of the fan 18, the laser range finder body 1 has good heat dissipation effect, the temperature of the laser range finder body 1 during working is reduced, the service life of the laser range finder body 1 is prolonged, the spring II 13 is fixedly arranged between the extension plate 12 and the connecting cavity 14, the elasticity of the spring II 13 provides the extension plate 12 with the tendency of moving towards the center of the supporting block 6, one opposite surface of the two ejector rods 11 is contacted with the push block 10, the deflector rod 15 is arranged at the right end of the push block 10, the deflector rod 15 moves towards the rear side, when the front end of the push block 10 is positioned in the middle of the two ejector rods 11, the elasticity of the spring II 13 drives the ejector rods 11 to retract towards the supporting block 6, make in the ejector pin 11 stretches out the outside part of supporting shoe 6 and all receive in supporting shoe 6, can directly take out laser range finder body 1 from supporting shoe 6 middle part this moment to the realization is convenient to dismantle laser range finder body 1, has reduced operating personnel's intensity of labour, has increased the practicality of device.
In one embodiment, as shown in fig. 6, the laser distance measuring sensor for automobile collision avoidance further includes a storage adjusting device;
the rear end of the accommodating and adjusting device is fixedly connected to the front part of the mounting plate 2, the front end of the accommodating and adjusting device is fixedly connected to the rear part of the supporting block 6, and the rear end face of the laser range finder body 1 is positioned at the front end of the accommodating and adjusting device;
the accommodation adjusting device comprises a support column 21 and a support table 22;
the front end face of the mounting plate 2 is provided with a mounting groove, the rear end of the support column 21 is fixedly connected to the bottom of the mounting groove, and the front end of the support column 21 is fixedly connected to the rear end face of the support table 22;
a limiting table 23 is supported on the front end face of the supporting table 22, the front end of the limiting table 23 is fixedly connected to the rear end of the supporting block 6, and the rear end face of the laser range finder body 1 is located at the front end of the limiting table 23;
the rear end of the support table 22 is hinged with one end of a first inclined rod 24;
the other end of the first diagonal rod 24 is hinged with a second diagonal rod 25, and the second diagonal rod 25 is an electric telescopic rod;
the other end of the second inclined rod 25 is hinged with a support rod 30;
one end of the supporting arm 28 and one end of the connecting rod 29 are hinged above the supporting rod 30;
the other end of the supporting arm 28, which is far away from the supporting rod 30, is rotatably connected to the side of the supporting platform 22;
the other end of the connecting rod 29 is hinged on the base 26;
the front end of base 26 is in the rear end of spacing platform 23, spacing platform 23 rear end is located base 26 one side sets up limiting plate 27, limiting plate 27 is used for to the base 26 slip spacing.
The beneficial effects of the above technical scheme are: the rear end of the accommodating and adjusting device is fixedly connected to the front part of the mounting plate, and the front end of the accommodating and adjusting device is fixedly connected to the rear part of the supporting block.
The utility model discloses a supporting bench, including a supporting bench, a supporting bench front end face support has spacing platform, the rear end of supporting bench articulates the one end that has first down tube, the other end of first down tube articulates there is the second down tube, the other end of second down tube articulates there is the bracing piece, the articulated support arm one end of top and connecting rod one end of bracing piece, the other end of keeping away from the bracing piece of support arm is rotated and is connected supporting bench's side, the other end of connecting rod articulates on the base, the front end sliding connection who states the base is in spacing platform's rear end, spacing platform rear end is located base one side sets up the limiting plate, the limiting plate is used for right the base slide.
The supporting column can support and fix the supporting table, the diagonal rod, the supporting arm and the like can play a role of supporting the limiting table, so that the laser ranging sensor body can be conveniently replaced, the diagonal rod can be supported when the position needs to be lifted (electric telescopic extension is adopted, and the vertical distance/height between the limiting table and the mounting plate is adjusted through the effect of the supporting arm), so that the position of the limiting table surface is improved, the limiting table surface supports the laser ranging sensor body, when the laser sensor body needs to be replaced, the operation efficiency of an operator is improved conveniently and quickly, the lifting structure can be stabilized due to the existence of the baffle, and the stability and firmness of the system are ensured; and the depth of the mounting groove can be adjusted, so that when the laser sensor is not used, the whole laser sensor body is accommodated in the mounting groove, and a protection effect is achieved.
In one embodiment, the laser distance measuring sensor for automobile collision avoidance further comprises a time detection device, an electro-optical modulator, a control device and an alarm;
the time detection device is used for measuring the time length from the laser emitting to the laser receiving of the laser range finder body 1;
the electro-optical modulator is used for detecting the laser modulation rate of the laser emitted by the laser ranging sensor body 1;
the first detection device is arranged on the laser ranging sensor body 1 and used for detecting the laser refractive index of the environment where the laser ranging sensor body 1 is located;
the controlling means with time detection device, electro-optical modulator, first detection device, alarm and 1 electricity of laser range finder body is connected, controlling means is based on time detection device, electro-optical modulator, first detection device control the alarm work includes:
step 1: the corrected time length delta psi can be calculated based on the laser modulation rate of the laser emitted by the laser ranging sensor body 1 detected by the electro-optic modulator;
eta is the laser modulation rate when the electro-optical modulator emits the laser, psi is the refractive index of the optical fiber of the environment detected by the first detection device, T is the detection value of the time detection device, exp is a natural constant, the value is 2.72, and the total error of the electro-optical modulator, the time detection device and the first detection device is obtained (the total error is the product of the error/precision of the electro-optical modulator, the error/precision of the time detection device and the error/precision of the first detection device); psi0For presetting a reference refractive index, eta, of the optical fiber0A preset reference laser modulation rate is set;
step 2: calculating the distance between the laser range finder body 1 and the measured object based on the step 1 and the formula (2);
measured distance
d represents the distance between the laser range finder body and the measured object, c represents the propagation speed of light in the air, ln is a natural logarithm, f (t) is a function of the laser modulation rate of the laser ranging sensor body 1 emitted laser along with the change of time t acquired by the electro-optical modulator, and f0(t) is a function of the preset laser modulation rate of the laser emitted by the ranging sensor body 1 along with the change of time t;
expressed as integrating f (t),
is expressed as a pair f0(t) integrating, dt being the derivative of the independent variable t;
and when the difference value between the distance from the laser range finder body 1 to the measured object and the braking safety distance of the automobile calculated in the step 2 is smaller than the preset minimum allowable difference value, the control device controls the alarm to give an alarm.
The beneficial effects of the above technical scheme are: the device also comprises a time detection device, an electro-optical modulator, a control device and an alarm; the time detection device is used for measuring the time length from the laser emitting to the laser receiving of the laser range finder body 1; the electro-optical modulator is used for detecting the laser modulation rate of the laser emitted by the laser ranging sensor body; the first detection device is arranged on the laser ranging sensor body and used for detecting the laser refractive index of the environment where the laser ranging sensor body is located.
The control device is electrically connected with the time detection device, the electro-optical modulator, the first detection device, the alarm and the laser range finder body, and controls the alarm to work based on the time detection device, the electro-optical modulator and the first detection device;
firstly, the corrected time length can be calculated based on the laser modulation rate of the laser emitted by the laser range finder sensor body 1 detected by the electro-optic modulator, the distance between the laser range finder body 1 and the measured object is calculated based on the step 1 and the formula (2), and when the difference value between the distance between the laser range finder body 1 and the measured object calculated in the step 2 and the braking safety distance of the automobile is smaller than the preset minimum allowable difference value, the control device controls the alarm to give an alarm. Make measured distance accuracy high through above-mentioned correction, the error is littleer, when arriving brake safe distance, the alarm will be given to transmission signal to the laser range finder body, and the alarm will indicate the driver to reduce the speed of traveling to improve safety.
The measured time and distance are corrected by considering the actual laser modulation rate factor and the laser refraction factor of the actual environment through the correction of the formulas (1) and (2), so that the calculation result is reliable; and the error coefficient is considered, so that the calculation reliability is further improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Meanwhile, in the drawings of the invention, the filling pattern is only used for distinguishing the layers and is not limited at all.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a laser rangefinder sensor for automobile anticollision, includes laser range finder body (1) and mounting panel (2), its characterized in that: the front side surface and the rear side surface of the laser range finder body (1) are both provided with a baffle plate (3), positioning blocks (4) are fixedly arranged at four corners of the baffle (3), one surface of each positioning block (4) close to the center of the laser range finder body (1) is provided with a splicing hole (5), a supporting block (6) is fixedly arranged on the front side surface of the mounting plate (2), a movable cavity (8) is arranged in the middle of the supporting block (6), a first spring (9) is fixedly arranged on the rear side surface of the inner cavity of the movable cavity (8), the other end of the first spring (9) is fixedly provided with a push block (10), the inner cavity of the movable cavity (8) is movably connected with a push rod (11), the right end fixed mounting of ejector pin (11) has extension board (12), the one side fixed mounting that extension board (12) kept away from ejector pad (10) has spring two (13).
2. The laser ranging sensor for automobile collision avoidance according to claim 1, wherein: the rear side fixed mounting of laser range finder body (1) has conducting strip (17), the rear side transmission of laser range finder body (1) is connected with fan (18), fan (18) are located the rear side of conducting strip (17), fan (18) do not contact with conducting strip (17), conducting strip (17) are total four, four the equidistance distributes between conducting strip (17), mounting hole (19) have all been seted up to the four corners department on mounting panel (2) surface.
3. The laser ranging sensor for automobile collision avoidance according to claim 1, wherein: locating grooves (7) are formed in the left end and the right end of the baffle (3), the height value of each locating groove (7) is equal to the height value of each supporting block (6), and the supporting blocks (6) are movably connected into the locating grooves (7).
4. The laser ranging sensor for automobile collision avoidance according to claim 1, wherein: the middle part of supporting shoe (6) has been seted up and has been connected chamber (14), the other end fixed mounting of two springs (13) is connected the one side that chamber (14) inner chamber was kept away from ejector pad (10), the right flank fixed mounting of ejector pad (10) has driving lever (15), the groove of stepping down (16) has been seted up to the one side that laser range finder body (1) center was kept away from in supporting shoe (6), driving lever (15) swing joint is in the groove of stepping down (16), the length value in the groove of stepping down (16) equals the length value of ejector pad (10), the right-hand member of driving lever (15) runs through and extends to the right side of supporting shoe (6).
5. The laser ranging sensor for automobile collision avoidance according to claim 1, wherein: the cross section of the ejector rod (11) extending out of one section of the supporting block (6) is triangular, and one end of the ejector rod (11) extending out of the supporting block (6) is clamped in the plug-in hole (5).
6. The laser ranging sensor for automobile collision avoidance according to claim 1, wherein: connect chamber (14) total two, two connect chamber (14) and be located the top and the below of ejector pad (10) respectively, the right side and the groove of stepping down (16) intercommunication in activity chamber (8).
7. The laser ranging sensor for automobile collision avoidance according to claim 1, wherein: the push block (10) is composed of two right-angle trapezoids and a rectangle, and the ejector rod (11) is located above and below the two right-angle trapezoids of the push block (10).
8. The laser ranging sensor for automobile collision avoidance according to claim 1, wherein: the laser ranging sensor for automobile collision avoidance further comprises a storage adjusting device;
the rear end of the accommodating and adjusting device is fixedly connected to the front part of the mounting plate (2), the front end of the accommodating and adjusting device is fixedly connected to the rear part of the supporting block (6), and the rear end face of the laser range finder body (1) is located at the front end of the accommodating and adjusting device;
the accommodation adjusting device comprises a support column (21) and a support table (22);
the front end face of the mounting plate (2) is provided with a mounting groove, the rear end of the support column (21) is fixedly connected to the bottom of the mounting groove, and the front end of the support column (21) is fixedly connected to the rear end face of the support table (22);
a limiting table (23) is supported on the front end face of the supporting table (22), the front end of the limiting table (23) is fixedly connected to the rear end of the supporting block (6), and the rear end face of the laser range finder body (1) is located at the front end of the limiting table (23);
the rear end of the support table (22) is hinged with one end of a first inclined rod (24);
the other end of the first inclined rod (24) is hinged with a second inclined rod (25), and the second inclined rod (25) is an electric telescopic rod;
the other end of the second inclined rod (25) is hinged with a support rod (30);
one end of the supporting arm (28) and one end of the connecting rod (29) are hinged above the supporting rod (30);
the other end of the supporting arm (28) far away from the supporting rod (30) is rotatably connected to the side of the supporting platform (22);
the other end of the connecting rod (29) is hinged on the base (26);
the front end sliding connection of base (26) is in the rear end of spacing platform (23), spacing platform (23) rear end is located base (26) one side sets up limiting plate (27), limiting plate (27) are used for right base (26) slide spacing.
9. The laser ranging sensor for automobile collision avoidance according to claim 1, wherein: the laser ranging sensor for automobile collision avoidance further comprises a time detection device, an electro-optic modulator, a control device and an alarm;
the time detection device is used for measuring the time length from the laser emitting to the laser receiving of the laser range finder body (1);
the electro-optical modulator is used for detecting the laser modulation rate of the laser emitted by the laser ranging sensor body (1);
the first detection device is arranged on the laser ranging sensor body (1) and used for detecting the laser refractive index of the environment where the laser ranging sensor body (1) is located;
the controlling means with time detection device, electro-optical modulator, first detection device, alarm and laser range finder body (1) electricity is connected, controlling means is based on time detection device, electro-optical modulator, first detection device control the alarm work includes:
step 1: the corrected time length delta psi can be calculated based on the laser modulation rate of the laser emitted by the laser ranging sensor body (1) detected by the electro-optic modulator;
eta is the laser modulation rate when the electro-optical modulator detects the laser, psi is the refractive index of the optical fiber of the environment detected by the first detection device, T is the detection value of the time detection device, exp is a natural constant, the value is 2.72, and the total error is the total error of the electro-optical modulator, the time detection device and the first detection device; psi0For presetting a reference refractive index, eta, of the optical fiber0A preset reference laser modulation rate is set;
step 2: calculating the distance between the laser range finder body (1) and the measured object based on the step 1 and the formula (2);
measured distance
d represents the distance between the laser range finder body and the measured object, c represents the propagation speed of light in the air, ln is a natural logarithm, f (t) is a function of the laser modulation rate of the laser ranging sensor body (1) emitted laser along with the change of time t, which is acquired by an electro-optical modulator, f0(t) is a function of the laser modulation rate of the laser emitted by the preset ranging sensor body (1) along with the change of time t;
expressed as integrating f (t),
is expressed as a pair f0(t) integrating, dt being the derivative of the independent variable t;
and when the difference value between the distance from the laser range finder body (1) to the measured object and the braking safety distance of the automobile calculated in the step 2 is smaller than the preset minimum allowable difference value, the control device controls the alarm to give an alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048850.0A CN112180387A (en) | 2020-09-29 | 2020-09-29 | Laser ranging sensor for automobile collision avoidance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048850.0A CN112180387A (en) | 2020-09-29 | 2020-09-29 | Laser ranging sensor for automobile collision avoidance |
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| CN112180387A true CN112180387A (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011048850.0A Withdrawn CN112180387A (en) | 2020-09-29 | 2020-09-29 | Laser ranging sensor for automobile collision avoidance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466885A (en) * | 2021-08-31 | 2021-10-01 | 南通市金润市政工程有限公司 | Distance measuring equipment of laser distance measuring sensor |
| CN115257553A (en) * | 2022-05-13 | 2022-11-01 | 信义汽车玻璃(深圳)有限公司 | Automobile glass |
-
2020
- 2020-09-29 CN CN202011048850.0A patent/CN112180387A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466885A (en) * | 2021-08-31 | 2021-10-01 | 南通市金润市政工程有限公司 | Distance measuring equipment of laser distance measuring sensor |
| CN113466885B (en) * | 2021-08-31 | 2021-11-02 | 南通市金润市政工程有限公司 | Distance measuring equipment of laser distance measuring sensor |
| CN115257553A (en) * | 2022-05-13 | 2022-11-01 | 信义汽车玻璃(深圳)有限公司 | Automobile glass |
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