CN113701691A - Continuous calibration platform of road surface condition sensor and calibration method thereof - Google Patents
Continuous calibration platform of road surface condition sensor and calibration method thereof Download PDFInfo
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- CN113701691A CN113701691A CN202111003379.8A CN202111003379A CN113701691A CN 113701691 A CN113701691 A CN 113701691A CN 202111003379 A CN202111003379 A CN 202111003379A CN 113701691 A CN113701691 A CN 113701691A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
Abstract
A continuous calibration platform of a road condition sensor and a calibration method thereof belong to the field of calibration of road instruments and aim to solve the problems that reliable test equipment is lacked in calibration of the road condition sensor and the test precision and effectiveness are poor in the prior art. It includes: a square opening is formed in the calibration platform, the right end of the opening is communicated with a cross-shaped guide rod sliding groove, a cross-shaped guide rod is installed on the opening, a pulley sliding groove is formed in the center of the cross rod, and a vertical rod located on the right side of the cross rod is installed in the cross-shaped guide rod sliding groove; a pulley is arranged in the pulley chute; the road surface condition sensor is arranged on a calibration disc which is arranged on the cross guide rod; the thickness gauge is arranged on the height adjusting assembly; the pulley is controlled by a motor to slide in the pulley chute, the cross guide rod is driven to reciprocate along the cross guide rod chute, the calibration disc is made to reciprocate, and the thickness of a water film or an ice film on the surface of the pavement condition sensor is measured by the thickness gauge. The method is used for calibrating the data of the water film and the ice film measured by the contact type road surface slippery condition sensor.
Description
Technical Field
The invention relates to a continuous calibration platform of a road surface condition sensor and a calibration method thereof, belonging to the field of calibration of road instruments.
Background
With the improvement of road infrastructure and the improvement of road transportation level, great contribution is made to the development of national economy. However, the traffic accident rate of road transportation is very high, and particularly after water is accumulated on the road surface and the road surface is frozen, the friction coefficient of the road surface is greatly reduced, the anti-skid capability is greatly weakened, and the traffic accident is very easy to cause. According to statistics, in various traffic accidents, the road surface is wet and slippery, which causes great loss to social economy and life and property safety of people. Therefore, the method has important significance for monitoring the states of accumulated water, icing and the like of the road surface through the road surface wet and slippery state sensor. However, the road surface condition sensor needs to be calibrated to work normally, and for example, a contact type road surface slippery condition sensor needs to calibrate the measured value of the sensor through actually measured water film thickness or ice film thickness data before formal use.
At present, the sensor is calibrated by mainly measuring the icing thickness on the surface of a contact type sensor in a wet and slippery state of a road surface through a vernier caliper, a micro camera, a laser range finder, an ultrasonic thickness gauge and the like, and further establishing a functional relation between the measured value of the sensor and the thickness values of a water film and an ice film to realize the calibration. The method has the advantages of complex operation, long time consumption, large artificial interference, larger calibration error, high cost and low efficiency of batch calibration sensors.
Disclosure of Invention
The invention aims to solve the problems that reliable test equipment is lacked for calibrating a road condition sensor and the test precision and effectiveness are poor in the prior art, and provides a continuous calibration platform of the road condition sensor and a calibration method thereof.
The invention relates to a continuous calibration platform of a pavement condition sensor, which comprises a calibration platform, a calibration disc, a cross guide rod, a thickness gauge and a motor;
a square opening is formed in the table top of the calibration table, the right end of the square opening is communicated with a cross-shaped guide rod sliding groove, a T-shaped rod is arranged at the left end of the square opening, a cross rod of the T-shaped rod is fixed on the table top at the left end of the square opening, and a vertical rod of the T-shaped rod is suspended on the square opening;
a cross guide rod is arranged on the square opening, a pulley sliding groove is formed in the center of a cross rod of the cross guide rod, a T-shaped rod sliding groove is formed in the inner cavity of a vertical rod of the cross guide rod positioned on the left side of the cross rod, a vertical rod of the T-shaped rod is matched with the T-shaped rod sliding groove, and a vertical rod of the cross guide rod positioned on the right side of the cross rod is arranged in the cross guide rod sliding groove;
a pulley is arranged in the pulley chute;
the road surface condition sensor is arranged on a calibration disc which is arranged on a vertical rod of the cross-shaped guide rod on the right side of the cross rod;
the thickness gauge is arranged on the height adjusting assembly through a cross beam and is arranged above the calibration disc;
the pulley slides in the pulley spout through motor control, and then drives the cross-guide and follow cross-guide spout reciprocating motion, and then makes the calibration plate do reciprocating motion, measures the thickness of the water film or the ice film on road surface condition sensor surface through the calibrator.
Preferably, it also comprises an environment simulation box;
the environment simulation box comprises a box body arranged on the outermost side, and also comprises a rain system, a refrigerating system and a heating system which are arranged in the box body and are used for simulating rainfall, icing and different environmental temperatures; the rear wall of the box body is provided with a circular hole with a through line, and the circular hole is sealed by a heat insulating material.
Preferably, the traction device further comprises a traction rod, one end of the traction rod is fixedly connected with the pulley, and the other end of the traction rod is connected with an output shaft of the motor.
Preferably, the motor is fixed under a square opening formed on the table top of the calibration table through a motor support;
the motor support comprises two trapezoidal rods, and the two trapezoidal rods are respectively arranged on two sides of the motor.
Preferably, the calibration disc comprises a fixed seat, a rectangular bottom plate, a magnetic sliding block, two crescent blocks and two springs;
a rectangular bottom plate is fixed at the top end of the fixing seat, a magnetic sliding block sliding groove is transversely formed in the rectangular bottom plate, the magnetic sliding block is embedded into the magnetic sliding block sliding groove, the two crescent blocks are respectively adsorbed on two sides above the magnetic sliding block, and two ends of the two crescent blocks are respectively connected through two springs;
the bottom end of the fixed seat is fixed on the cross-shaped guide rod.
Preferably, the height adjusting component comprises a coarse adjusting knob, a fine adjusting knob, a fixed frame and a scale rod;
all be provided with the gear on mount, coarse adjustment knob and the fine setting knob, respectively with the track meshing on the scale pole, the vertical top of installing at the calibration disc of scale pole.
Preferably, the road surface condition sensor is mounted on the calibration plate, and the edge of the upper surface of the road surface condition sensor is sleeved with the soft ceramic enclosure.
The invention relates to a continuous calibration method of a road surface condition sensor, which comprises the following specific processes:
s1, mounting the road condition sensor on a calibration disc, and adjusting a height adjusting component according to the model of the road condition sensor to enable the thickness gauge to measure the road condition sensor;
s2, placing the calibration platform in an environment simulation box, leading out the connecting wires of the pavement condition sensor, the motor and the thickness gauge through a circular hole with a through wire on the rear wall of the box body, and plugging the circular hole by adopting a heat insulating material;
s3, opening a rain system of the environment simulation box, setting a rain area and a rain amount, and forming a water film on the surface of the road surface condition sensor;
s4, opening a refrigerating system of the environment simulation box, and forming an ice film on the surface of the road surface condition sensor;
s5, connecting the connecting wire of the thickness gauge with the controller and the display screen of the environment simulation box;
s6, turning on a motor;
s7, the road surface condition sensor reciprocates under the drive of the calibration disc, the cross guide rod and the traction rod, and the thickness gauge collects data of each section and uploads the data to the controller;
stopping the machine for 1.5 hours after the motor rotates for three weeks;
the controller performs averaging calculation on the measurement data of the motor rotating for three circles;
and then returns to execution S3.
The invention has the advantages that: the continuous calibration platform of the road surface condition sensor and the calibration method thereof are used for calibrating the data of the water film and the ice film measured by the contact type road surface slippery condition sensor.
The invention adopts the cross guide rod, the traction rod and the motor to realize the reciprocating motion of the road condition sensor, realizes the cyclic measurement of the overall thickness of different water films and ice films of the road condition sensor, and reduces the measurement error. And the height adjusting assembly is adopted, so that the measuring height of the thickness gauge can be adjusted according to different types of pavement condition sensors. The data transmission that the calibrator gathered to the controller can realize from demarcating through the measured data. The size of the calibration disc is adjustable, and the calibration of different types of pavement condition sensors can be realized.
The continuous calibration platform of the pavement condition sensor and the calibration method thereof can effectively realize the calibration of the contact state sensor, are a calibration platform with automatic acquisition, precise test and small interference of human factors, and can quickly and accurately measure the thickness of the ice layer on the surface of the contact state sensor. The performance realized by the platform is very important for promoting the development of the calibration field of the road state sensor.
Drawings
FIG. 1 is a schematic structural view of a continuous calibration platform of the road surface condition sensor of the present invention;
FIG. 2 is a schematic cross-sectional view of a continuous calibration platform of the road surface condition sensor according to the present invention;
FIG. 3 is a schematic structural diagram of the calibration table of the present invention;
FIG. 4 is a schematic view of the cross-bar of the present invention;
FIG. 5 is a schematic diagram of the construction of the calibration disk of the present invention;
FIG. 6 is a side view of a calibration disk of the present invention;
fig. 7 is a schematic view of the height adjustment assembly of the present invention.
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.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The first embodiment is as follows: the following describes the present embodiment with reference to fig. 1 to 4, and the continuous calibration platform of the road surface condition sensor in the present embodiment includes a calibration platform 2, a calibration disk 3, a cross-guide rod 4, a thickness gauge 8 and a motor 10;
a square opening is formed in the table top of the calibration table 2, the right end of the square opening is communicated with a cross-shaped guide rod sliding groove, a T-shaped rod is arranged at the left end of the square opening, a cross rod of the T-shaped rod is fixed on the table top at the left end of the square opening, and a vertical rod of the T-shaped rod is suspended on the square opening;
a cross guide rod 4 is installed on the square opening, a pulley sliding groove is formed in the center of a cross rod of the cross guide rod 4, a T-shaped rod sliding groove is formed in an inner cavity of a vertical rod of the cross guide rod 4 positioned on the left side of the cross rod, a vertical rod of the T-shaped rod is matched with the T-shaped rod sliding groove, and a vertical rod of the cross guide rod 4 positioned on the right side of the cross rod is installed in the cross guide rod sliding groove;
a pulley 5 is arranged in the pulley chute;
the road condition sensor 13 is arranged on the calibration disc 3, and the calibration disc 3 is arranged on a vertical rod of the cross guide rod 4 positioned on the right side of the cross rod;
the thickness gauge 8 is arranged on the height adjusting assembly 6 through a cross beam 7 and is arranged above the calibration disc 3;
the pulley 5 is controlled by the motor 10 to slide in the pulley chute, so as to drive the cross-shaped guide rod 4 to reciprocate along the cross-shaped guide rod chute, so that the calibration disc 3 reciprocates, and the thickness of a water film or an ice film on the surface of the pavement condition sensor 13 is measured by the thickness gauge 8.
In the present embodiment, the road surface condition sensor 13 is a contact-type road surface wet-skid condition sensor.
In the present embodiment, the motor 10 is a low-speed motor, the rotation speed, the rotation frequency and the cycle time interval are controllable, and the noise and the vibration are very small.
In this embodiment, the thickness gauge 8 is composed of a processing module, a signal generating module, a transmitting module, an acquiring module, and a wireless transmission module.
The second embodiment is as follows: the present embodiment is described below with reference to fig. 2, and the present embodiment further describes the first embodiment, and further includes an environment simulation box 1;
the environment simulation box 1 comprises a box body arranged on the outermost side, and also comprises a rain system 12, a refrigerating system and a heating system which are arranged in the box body and used for simulating rainfall, icing and different environment temperatures; the rear wall of the box body is provided with a circular hole with a through line, and the circular hole is sealed by a heat insulating material.
In this embodiment, the rain system 12, the refrigeration system, and the heating system are intelligently controlled by the controller, and are displayed and adjusted by the touch display screen. The emission module of calibrator 8 is a row of ultrasonic emission head, and calibrator 8 also can realize intelligent control through the controller.
In this embodiment, the rain system 12 includes a shower head, and the shower head can control the working range through a controller, so as to realize accurate rainfall in a specific area.
The third concrete implementation mode: the present embodiment is described below with reference to fig. 1 and 2, and the present embodiment further describes the first embodiment, and further includes a traction rod 9, one end of the traction rod 9 is fixedly connected with the pulley 5, and the other end is connected with an output shaft of the motor 10.
Further, the length of the traction rod 9 is half of the side length of the square opening formed on the table top of the calibration table 2.
The fourth concrete implementation mode: the embodiment is described below with reference to fig. 1 and fig. 2, and the embodiment further describes the first embodiment, the motor 10 is fixed on the top surface of the calibration table 2 through a motor bracket 11, and a square opening is formed right below the top surface;
the motor bracket 11 includes two trapezoidal bars, and the two trapezoidal bars are respectively disposed at two sides of the motor 10.
In this embodiment, the motor 10 is fixed to the motor bracket 11 by four sets of screws.
The fifth concrete implementation mode: the present embodiment is described below with reference to fig. 5 and fig. 6, and the present embodiment further describes the first embodiment, where the calibration plate 3 includes a fixed seat 31, a rectangular bottom plate 32, a magnetic slider 33, two crescent blocks 34, and two springs 35;
a rectangular bottom plate 32 is fixed at the top end of the fixed seat 31, a magnetic slider sliding groove 36 is transversely formed in the rectangular bottom plate 32, the magnetic slider 33 is embedded into the magnetic slider sliding groove, the two crescent blocks 34 are respectively adsorbed on two sides above the magnetic slider 33, and two ends of the two crescent blocks 34 are respectively connected through two springs 35;
the bottom end of the fixed seat 31 is fixed on the cross guide rod 4.
Further, the rectangular bottom plate 32 is made of a non-magnetic material; the crescent block 34 is made of stainless steel material.
The sixth specific implementation mode: referring to fig. 7, the present embodiment will be described, which further describes the first embodiment, wherein the height adjusting assembly 6 includes a coarse adjusting knob 61, a fine adjusting knob 62, a fixing frame 63 and a scale rod 64;
all be provided with the gear on mount 63, coarse adjustment knob 61 and the fine adjustment knob 62, respectively with the track meshing on the scale pole 64, scale pole 64 is vertical installs the top at calibration disc 3.
The seventh embodiment: the present embodiment will be described with reference to fig. 1 and 2, and the present embodiment further describes the first embodiment, in which the road surface condition sensor 13 is mounted on the calibration plate 3, and the edge of the upper surface of the road surface condition sensor 13 is sleeved with the soft ceramic envelope 14.
In this embodiment, the soft ceramic enclosure 14 has the advantages of water resistance, high and low temperature resistance, and high strength after molding.
In this embodiment, the manufacturing method of the soft ceramic enclosure 14 is as follows:
determining the size of the soft ceramic enclosure 14 according to the size of the pavement condition sensor 13, and further determining the size of a mold of the soft ceramic enclosure 14;
placing the soft ceramic in a mould for forming;
demolding, and baking in an oven at the temperature of 100-120 ℃ for 10-20 minutes;
and cooling the soft ceramic enclosure 14 in a room temperature environment, then placing the soft ceramic enclosure on the pavement condition sensor 13, and filling the joint with a high-temperature-resistant waterproof material.
The specific implementation mode is eight: the following describes the present embodiment with reference to fig. 1 to 7, where the continuous calibration method for a road surface condition sensor according to the present embodiment is implemented based on a continuous calibration platform, and the specific process of the calibration method includes:
s1, mounting the road condition sensor 13 on the calibration disc 3, and adjusting the height adjusting component 6 according to the model of the road condition sensor 13, so that the thickness gauge 8 can measure the road condition sensor 13;
s2, placing the calibration platform 2 in the environment simulation box 1, leading out the connecting wires of the road surface condition sensor 13, the motor 10 and the thickness gauge 8 through a circular hole with a through wire on the rear wall of the box body, and plugging the circular hole by adopting a heat insulating material;
s3, opening the rain system 12 of the environment simulation box 1, setting a rain area and a rain amount, and forming a water film on the surface of the road condition sensor 13;
s4, opening a refrigerating system of the environment simulation box 1, and forming an ice film on the surface of the road surface condition sensor 13;
s5, connecting the connecting wire of the thickness gauge 8 with the controller and the display screen of the environment simulation box 1;
s6, turning on the motor 10;
s7, the road surface condition sensor 13 reciprocates under the driving of the calibration disc 3, the cross guide rod 4 and the traction rod 9, and the thickness gauge 8 collects data of each section and uploads the data to the controller;
stopping the machine for 1.5 hours after the motor 10 rotates for three weeks;
the controller calculates the average value of the measured data of the motor 10 rotating for three circles;
and then returns to execution S3.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. A continuous calibration platform of a road surface condition sensor is characterized by comprising a calibration platform (2), a calibration disc (3), a cross guide rod (4), a thickness gauge (8) and a motor (10);
a square opening is formed in the table top of the calibration table (2), the right end of the square opening is communicated with a cross guide rod sliding groove, a T-shaped rod is arranged at the left end of the square opening, a cross rod of the T-shaped rod is fixed on the table top at the left end of the square opening, and a vertical rod of the T-shaped rod is suspended on the square opening;
a cross guide rod (4) is installed on the square opening, a pulley sliding groove is formed in the center of a cross rod of the cross guide rod (4), a T-shaped rod sliding groove is formed in an inner cavity of a vertical rod of the cross guide rod (4) on the left side of the cross rod, a vertical rod of the T-shaped rod is matched with the T-shaped rod sliding groove, and a vertical rod of the cross guide rod (4) on the right side of the cross rod is installed in the cross guide rod sliding groove;
a pulley (5) is arranged in the pulley chute;
the road surface condition sensor (13) is arranged on the calibration disc (3), and the calibration disc (3) is arranged on a vertical rod of the cross guide rod (4) on the right side of the cross rod;
the thickness gauge (8) is arranged on the height adjusting assembly (6) through a cross beam (7) and is arranged above the calibration disc (3);
the pulley (5) is controlled to slide in the pulley sliding groove through the motor (10) so as to drive the cross guide rod (4) to reciprocate along the cross guide rod sliding groove, so that the calibration disc (3) can reciprocate, and the thickness of a water film or an ice film on the surface of the pavement condition sensor (13) is measured through the thickness gauge (8).
2. The continuous calibration platform of pavement condition sensors according to claim 1, characterized in that it further comprises an environmental simulation box (1);
the environment simulation box (1) comprises a box body arranged on the outermost side, and also comprises a rain system (12), a refrigerating system and a heating system which are arranged in the box body and used for simulating rainfall, icing and different environment temperatures; the rear wall of the box body is provided with a circular hole with a through line, and the circular hole is sealed by a heat insulating material.
3. The continuous calibration platform of the pavement condition sensor according to claim 1, further comprising a traction rod (9), wherein one end of the traction rod (9) is fixedly connected with the pulley (5), and the other end of the traction rod is connected with an output shaft of the motor (10).
4. The continuous calibration platform of the road surface condition sensor according to claim 3, wherein the length of the traction rod (9) is half of the side length of a square opening formed on the surface of the calibration platform (2).
5. The continuous calibration platform of the pavement condition sensor according to claim 1, wherein the motor (10) is fixed on the top of the calibration platform (2) through a motor bracket (11) under a square opening;
the motor support (11) comprises two trapezoidal rods, and the two trapezoidal rods are respectively arranged on two sides of the motor (10).
6. The continuous calibration platform of the road surface condition sensor according to claim 1, characterized in that the calibration disk (3) comprises a fixed seat (31), a rectangular bottom plate (32), a magnetic slider (33), two crescent blocks (34) and two springs (35);
a rectangular bottom plate (32) is fixed at the top end of the fixed seat (31), a magnetic slider sliding groove (36) is transversely formed in the rectangular bottom plate (32), the magnetic slider (33) is embedded into the magnetic slider sliding groove, the two crescent blocks (34) are respectively adsorbed on two sides above the magnetic slider (33), and two ends of the two crescent blocks (34) are respectively connected through two springs (35);
the bottom end of the fixed seat (31) is fixed on the cross guide rod (4).
7. The continuous calibration platform of the road surface condition sensor according to claim 6, characterized in that the rectangular bottom plate (32) is made of non-magnetic material; the crescent block (34) is made of stainless steel materials.
8. The continuous calibration platform of the road surface condition sensor according to claim 1, characterized in that the height adjustment assembly (6) comprises a coarse adjustment knob (61), a fine adjustment knob (62), a fixed mount (63) and a scale rod (64);
all be provided with the gear on mount (63), coarse adjustment knob (61) and fine adjustment knob (62), respectively with the track meshing on scale pole (64), the vertical top of installing in calibration disc (3) of scale pole (64).
9. The continuous calibration platform of the pavement condition sensor according to claim 1, wherein the pavement condition sensor (13) is installed on the calibration plate (3), and the edge of the upper surface of the pavement condition sensor (13) is sleeved with a soft ceramic enclosure (14).
10. The continuous calibration method of the road surface condition sensor is realized based on the continuous calibration platform of claim 1, and is characterized in that the specific process of the calibration method comprises the following steps:
s1, mounting the road condition sensor (13) on the calibration disc (3), and adjusting the height adjusting assembly (6) according to the model of the road condition sensor (13) so that the thickness gauge (8) can measure the road condition sensor (13);
s2, placing the calibration platform (2) in an environment simulation box (1), leading out the connecting wires of the road surface condition sensor (13), the motor (10) and the thickness gauge (8) through a circular hole with a through wire on the rear wall of the box body, and plugging the circular hole by adopting a heat insulating material;
s3, opening a rain system (12) of the environment simulation box (1), setting a rain area and a rain amount, and forming a water film on the surface of the road surface condition sensor (13);
s4, opening a refrigerating system of the environment simulation box (1) and forming an ice film on the surface of the road surface condition sensor (13);
s5, connecting the connecting wire of the thickness gauge (8) with the controller and the display screen of the environment simulation box (1);
s6, turning on the motor (10);
s7, the road surface condition sensor (13) reciprocates under the driving of the calibration disc (3), the cross guide rod (4) and the traction rod (9), and the thickness gauge (8) collects data of each section and uploads the data to the controller;
stopping the machine for 1.5 hours after the motor (10) rotates for three weeks;
the controller calculates the average value of the measurement data of the motor (10) rotating for three circles;
and then returns to execution S3.
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| CN202111003379.8A CN113701691B (en) | 2021-08-30 | 2021-08-30 | Continuous calibration platform of road surface condition sensor and calibration method thereof |
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| CN202111003379.8A CN113701691B (en) | 2021-08-30 | 2021-08-30 | Continuous calibration platform of road surface condition sensor and calibration method thereof |
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Effective date of registration: 20230117 Address after: 150000 No. 92, West Da Zhi street, Nangang District, Harbin, Heilongjiang. Patentee after: HARBIN INSTITUTE OF TECHNOLOGY Patentee after: Shandong high speed Construction Management Group Co.,Ltd. Address before: 150001 No. 92 West straight street, Nangang District, Heilongjiang, Harbin Patentee before: HARBIN INSTITUTE OF TECHNOLOGY |