CN113567997B - Laser ranging device and method for measuring change of magnetic pole spacing - Google Patents
Laser ranging device and method for measuring change of magnetic pole spacing Download PDFInfo
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- CN113567997B CN113567997B CN202111144572.3A CN202111144572A CN113567997B CN 113567997 B CN113567997 B CN 113567997B CN 202111144572 A CN202111144572 A CN 202111144572A CN 113567997 B CN113567997 B CN 113567997B
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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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- 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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- Electromagnetism (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a laser distance measuring device for measuring the change of a magnetic pole distance and a distance measuring method thereof, wherein the laser distance measuring device comprises a shock absorber and a monitoring module, the shock absorber comprises a shock absorption piston cylinder fixed with a wheel assembly, a fixed flange seat fixed with a vehicle chassis and a piston rod at the output end of the shock absorption piston cylinder, and the piston rod is sleeved with a shock absorption spring; a square corrugated pipe is fixed between the upper supporting plate and the lower supporting plate, and a buffer spring is arranged inside the square corrugated pipe; the monitoring module comprises a first Hall sensor, a second Hall sensor and a laser ranging sensor, and the lower end of the supporting spring is connected with an electrode block. The integral structure of the invention occupies small space and is convenient to disassemble and assemble; the magnetic pole distance is measured in two modes, the measurement is convenient and fast, the average value is finally calculated, the accurate magnetic pole distance is obtained, the error caused by a single measurement means can be avoided, and the accuracy of vehicle load measurement is improved.
Description
Technical Field
The invention relates to the technical field of laser ranging devices, in particular to a laser ranging device and a ranging method for measuring magnetic pole spacing change.
Background
The invention relates to a distance measuring device, which can monitor the load of a vehicle, has an important function in the logistics process, can prevent overload or be used for carrying out data analysis on the load of the vehicle, is not good in monitoring accuracy due to damage and loss caused by overload transportation of a truck, is inconvenient to mount, dismount, maintain and replace components, is not good in protection effect of the components and is easy to damage, and therefore, the laser distance measuring device and the distance measuring method for measuring the change of the magnetic pole distance are provided.
Disclosure of Invention
The invention aims to provide a laser distance measuring device and a distance measuring method thereof for measuring the change of the magnetic pole distance.
In order to achieve the purpose, the invention provides the following technical scheme: a laser distance measuring device for measuring the change of the magnetic pole spacing comprises a shock absorber and a monitoring module, wherein the shock absorber comprises a shock absorption piston cylinder fixed with a wheel assembly, a fixed flange seat fixed with a vehicle chassis and a piston rod at the output end of the shock absorption piston cylinder;
the bottom of the fixed flange seat is provided with an upper positioning ring seat, the top of the damping piston cylinder is provided with a lower positioning ring seat, the outer side of the bottom of the lower positioning ring seat is provided with a limiting ring, the top of the piston rod is connected to the lower end of the upper positioning ring seat, and the piston rod is sleeved with a damping spring;
the upper ring seat and the lower ring seat are respectively sleeved with the upper ring seat and the lower ring seat, and the side edges of the upper ring seat and the lower ring seat are respectively provided with an upper supporting plate and a lower supporting plate;
the monitoring module comprises a first Hall sensor, a second Hall sensor, a laser ranging sensor, an electromagnet, a data acquisition module, a data transmission module, a data receiving module and a data processing module, wherein the data acquisition module, the data transmission module, the data receiving module and the data processing module are integrated on the vehicle-mounted central control screen; the first Hall sensor and the second Hall sensor are vertically fixed on the side edge of an installation seat at the upper end of the lower supporting plate, the laser ranging sensor and the electromagnet are installed inside the cylindrical head, a square block is arranged at the upper end of the cylindrical head, a connector is arranged in the middle of the upper end of the square block, and the connector is screwed in an internal threaded hole at the bottom of the installation block;
the top of the mounting block is provided with a limiting cover, the mounting block is inserted into a square countersunk through groove on the upper supporting plate, two sides of the upper end of the square block are provided with clamping plates, the top of a cavity in the mounting block is provided with a power supply block, the top of the cavity is provided with a supporting spring, the lower end of the supporting spring is connected with an electrode block, two sides of the electrode block are provided with sliding plates, and the sliding plates are slidably connected in sliding grooves in the side wall of the cavity;
the first Hall sensor, the second Hall sensor and the laser ranging sensor are electrically connected with the data acquisition module, the output end of the data acquisition module is connected with the input end of the data transmission module, and the data transmission module is connected with the data processing module through the data receiving module.
Preferably, the upper end and the lower end of the damping spring are respectively inserted into the upper positioning ring seat and the lower positioning ring seat, the limiting ring and the damping piston cylinder are integrally formed. The upper ring seat and the upper supporting plate are integrally formed, and the upper ring seat is fixed on the upper positioning ring seat through a second bolt; the lower ring seat and the lower support plate are integrally formed, and the lower ring seat is fixed on the lower positioning ring seat through a third bolt;
the damping piston cylinder is inserted into the fixed cylinder, the side edge of the lower portion of the fixed cylinder is connected to the wheel assembly through a connecting arm, a slot is formed in the side edge of the upper portion of the fixed cylinder, fastening plates which are integrally formed with the fixed cylinder are arranged on two sides of the slot, and the two groups of fastening plates are directly connected through first screws.
Preferably, the fixed flange seat is fixed on the vehicle chassis through a first bolt, a pin on the top of the fixed flange seat is inserted into a corresponding pin hole on the vehicle chassis, and the pin, the fixed flange seat and the upper positioning ring seat are integrally formed.
Preferably, a square corrugated pipe is arranged between the upper supporting plate and the lower supporting plate, a buffer spring is arranged in the square corrugated pipe, and the buffer spring is arranged on the outer side of the square block.
Preferably, power supply block, supporting spring, electrode piece all are same vertical axis setting, and power supply block, supporting spring, electrode piece are in the cavity is setting placed in the middle, and is located directly over the internal thread hole.
Preferably, the upper end of the square corrugated pipe is provided with an upper square flange, the lower end of the square corrugated pipe is provided with a lower square flange, and the upper square flange and the lower square flange are respectively fixed at the lower end of the upper supporting plate and the upper end of the lower supporting plate through second screws.
A use method of a laser ranging device for measuring magnetic pole distance change comprises the following specific use steps:
inserting an installation block into a square countersunk through groove, then screwing a connecting head on the square block into an internal threaded hole at the bottom of the installation block, and finally, when the installation block is completely locked, clamping a limiting cover to the top of the square countersunk through groove and abutting a clamping plate against the lower end of an upper supporting plate;
when the connecting head is screwed in the internal threaded hole at the bottom of the mounting block, the electrode block is always tightly attached to the top of the connecting head under the elastic force action of the supporting spring, so that the power supply block is in contact with the connecting head for conducting electricity through the electrode block, and positive and negative electrodes on the connecting head supply power to the laser ranging sensor and the electromagnet through leads;
step three, when weighing is carried out, the electromagnet is caused to be close to the first Hall sensor and the second Hall sensor, Hall electromotive force changes due to the change of the distance in the period, the first Hall sensor and the second Hall sensor output corresponding voltage values V1 and V2, the voltage values are collected through the data collection module and transmitted to the data receiving module through the data transmission module, finally the voltage values are transmitted to the data processing module through the data receiving module, calculation processing is carried out according to software built in the data processing module, the target distance d1 can be obtained after calculation processing, and d1 is the distance between the electromagnet and the first Hall sensor;
step four, the laser ranging sensor is aligned to the first Hall sensor through the laser diode to emit laser pulses, the laser is scattered in all directions after being reflected by the first Hall sensor, part of scattered light returns to the sensor receiver and is imaged on the avalanche photodiode after being received by the optical system, the avalanche photodiode is an optical sensor with an amplifying function inside, therefore, the avalanche photodiode can detect extremely weak optical signals, record and process the time from the emission of the optical pulses to the return reception of the optical pulses, and the target distance d2 can be measured, wherein d2 is the distance between the electromagnet and the first Hall sensor;
and step five, averaging the values of d1 and d2 to calculate the final value of d, wherein different values of d represent different loads of the vehicle.
Preferably, the formula of the calculation processing performed by the software built in the data processing module is as follows:
V1= K*C/d2；
V2= K*C/(d+r)2；
V1/V2=(d+r)2/d2=(1+r/d)；
r/d=
- 1；
d=r/（
- 1）；
wherein V1 and V2 are voltage values output by the first hall sensor and the second hall sensor; r is the distance between the first hall sensor and the second hall sensor; d is the distance between the electromagnet and the first Hall sensor; k is the magnetic field coefficient and C is the magnetic field of the electromagnet.
Compared with the prior art, the invention has the beneficial effects that:
1. the integral structure of the invention occupies small space and is convenient to disassemble and assemble; the installation of the installation block is firm and stable, and the laser ranging sensor and the electromagnet are powered by electrifying after installation, so that the installation is quick; the distance d between the electromagnet and the first Hall sensor is measured in two ways, the measurement is convenient and quick, the average value is finally calculated to obtain an accurate d value, so that the error caused by a single measurement means can be avoided, and the accuracy of vehicle load measurement is improved;
2. the buffer spring is arranged in the square corrugated pipe, the damage to the first Hall sensor, the second Hall sensor, the laser ranging sensor and the electromagnet caused by bumping in the driving process of the vehicle is prevented through the buffer action of the buffer spring, the load measurement is carried out when the vehicle is static, and the buffer spring can not cause the first Hall sensor, the second Hall sensor, the laser ranging sensor and the electromagnet to move up and down under the condition of force balance, so that the accuracy of the load measurement is not influenced;
3. after the square corrugated pipe is installed, the protection effect on the first Hall sensor, the second Hall sensor, the laser ranging sensor and the electromagnet can be realized, dust or muddy water is prevented from entering, and the service life is prolonged.
Drawings
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a schematic side sectional view of the mounting block of the present invention;
FIG. 3 is an exploded view of the connection of the mounting block, the upper support plate and the square block of the present invention;
FIG. 4 is a schematic view of the overall structure of FIG. 3 according to the present invention;
FIG. 5 is a schematic structural view of the connection of the square corrugated tube with the upper support plate and the lower support plate according to the present invention;
FIG. 6 is a schematic structural view of the present invention as a whole;
FIG. 7 is a schematic diagram of a monitoring module according to the present invention.
In the figure: 1. a pin; 2. fixing a flange seat; 3. a first bolt; 4. an upper positioning ring seat; 5. a piston rod; 6. a damping spring; 7. a lower retainer ring seat; 8. a limiting ring; 9. a damping piston cylinder; 10. a fixed cylinder; 11. a first screw; 12. a connecting arm; 13. a fastening plate; 14. a lower ring seat; 15. a third bolt; 16. a lower support plate; 17. an upper ring seat; 18. a second bolt; 19. an upper support plate; 20. a mounting seat; 21. a square corrugated pipe; 22. a second screw; 23. a square countersunk through groove; 24. a square block; 25. mounting blocks; 26. a limiting cover; 27. a power supply block; 28. a chute; 29. a sliding connection plate; 30. an internally threaded bore; 31. a support spring; 32. an electrode block; 33. a cylindrical head; 34. a laser ranging sensor; 35. an electromagnet; 36. a chucking plate; 37. a connector; 38. a cavity; 39. a buffer spring; 40. an upper square flange; 41. a lower flange; 42. a first Hall sensor; 43. a second Hall sensor; 44. a data acquisition module; 45. a data transmission module; 46. a data receiving module; 47. and a data processing module.
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.
Referring to fig. 1 and 5, the present invention provides a technical solution: a laser distance measuring device for measuring the change of the magnetic pole spacing comprises a shock absorber and a monitoring module, wherein the shock absorber comprises a shock absorption piston cylinder 9 fixed with a wheel assembly, a fixed flange seat 2 fixed with a vehicle chassis and a piston rod 5 at the output end of the shock absorption piston cylinder 9; the bottom of the fixed flange seat 2 is provided with an upper locating ring seat 4, the top of the damping piston cylinder 9 is provided with a lower locating ring seat 7, the outer side of the bottom of the lower locating ring seat 7 is provided with a limiting ring 8, the top of the piston rod 5 is connected with the lower end of the upper locating ring seat 4, and the piston rod 5 is sleeved with a damping spring 6; an upper ring seat 17 and a lower ring seat 14 are respectively sleeved on the upper positioning ring seat 4 and the lower positioning ring seat 7, an upper supporting plate 19 and a lower supporting plate 16 are respectively arranged on the side edges of the upper ring seat 17 and the lower ring seat 14, a square corrugated pipe 21 is fixed between the upper supporting plate 19 and the lower supporting plate 16, and a buffer spring 39 is arranged inside the square corrugated pipe 21; through the cushioning effect of buffer spring 39, prevent to jolt at the vehicle in-process and cause the damage to first hall sensor 42, second hall sensor 43, laser rangefinder sensor 34 and electro-magnet 35, and when the vehicle was static, carry out the load and measure, buffer spring 39 also can not make first hall sensor 42, second hall sensor 43, laser rangefinder sensor 34 and electro-magnet 35 take place the reciprocating of position under the circumstances of power balance, do not influence the accuracy of load measurement.
Referring to fig. 2-7, the monitoring module includes a first hall sensor 42, a second hall sensor 43, a laser ranging sensor 34, an electromagnet 35, and a data acquisition module 44, a data transmission module 45, a data receiving module 46 and a data processing module 47 integrated on the vehicle-mounted central control screen; the first Hall sensor 42 and the second Hall sensor 43 are vertically fixed on the side edge of the mounting seat 20 at the upper end of the lower support plate 16, the laser ranging sensor 34 and the electromagnet 35 are mounted inside the cylindrical head 33, the square block 24 is arranged at the upper end of the cylindrical head 33, the connecting head 37 is arranged in the middle of the upper end of the square block 24, and the connecting head 37 is screwed with the internal threaded hole 30 at the bottom of the mounting block 25; the top of the mounting block 25 is provided with a limiting cover 26, the mounting block 25 is inserted into a square countersunk through groove 23 on the upper support plate 19, two sides of the upper end of the square block 24 are provided with clamping plates 36, the top of a cavity 38 in the mounting block 25 is provided with a power supply block 27, the top of the cavity 38 is provided with a support spring 31, the lower end of the support spring 31 is connected with an electrode block 32, the power supply block 27, the support spring 31 and the electrode block 32 are arranged on the same vertical axis, the power supply block 27, the support spring 31 and the electrode block 32 are arranged in the middle of the cavity 38 and are positioned right above the internal threaded hole 30, two sides of the electrode block 32 are provided with sliding connection plates 29, and the sliding connection plates 29 are slidably connected in sliding grooves 28 on the side wall of the cavity 38; the first hall sensor 42, the second hall sensor 43 and the laser ranging sensor 34 are electrically connected to the data acquisition module 44, the output end of the data acquisition module 44 is connected to the input end of the data transmission module 45, and the data transmission module 45 is connected to the data processing module 47 through the data receiving module 46.
Referring to fig. 1 and 6, the damping piston cylinder 9 is inserted into a fixed cylinder 10, the lower side edge of the fixed cylinder 10 is connected with a wheel assembly through a connecting arm 12, the upper side edge of the fixed cylinder 10 is provided with a slot, fastening plates 13 integrally formed with the fixed cylinder 10 are arranged on two sides of the slot, and the two groups of fastening plates 13 are directly connected through first screws 11. Through the arrangement of the grooves, the upper part of the fixed cylinder 10 can be expanded when the damping piston cylinder 9 is inserted, so that the damping piston cylinder 9 is smoothly inserted into the fixed cylinder 10, the fastening plate 13 is locked through the first screw 11, the upper part of the fixed cylinder 10 is tightened, and the damping piston cylinder 9 is firmly fixed in the fixed cylinder 10; the fixing flange seat 2 is fixed on a vehicle chassis through a first bolt 3, a pin column 1 on the top of the fixing flange seat 2 is inserted into a corresponding pin hole on the vehicle chassis, and the pin column 1, the fixing flange seat 2 and an upper positioning ring seat 4 are integrally formed. Fix through first bolt 3, and during the pinhole that corresponds on the vehicle chassis was inserted to round pin post 1, can realize mounting flange seat 2 and vehicle chassis's quick installation and fixed like this, and the installation is firm stable. The lower locating ring seat 7, the limiting ring 8 and the damping piston cylinder 9 are integrally formed. Therefore, the integral structural strength of the lower locating ring seat 7, the limiting ring 8 and the damping piston cylinder 9 can be ensured. The upper end and the lower end of the damping spring 6 are respectively inserted into the upper positioning ring seat 4 and the lower positioning ring seat 7. Can realize like this that the upper and lower end slippage of damping spring 6 prevents to the spacing fixed of damping spring 6, avoids causing damping spring 6's shock attenuation inefficacy. The upper ring seat 17 and the upper support plate 19 are integrally formed, and the upper ring seat 17 is fixed on the upper positioning ring seat 4 through a second bolt 18; the lower ring seat 14 and the lower support plate 16 are integrally formed, and the lower ring seat 14 is fixed on the lower positioning ring seat 7 through a third bolt 15. Therefore, the upper ring seat 17 and the lower ring seat 14 can be installed and fixed, and the fixing mode is simple and convenient for subsequent disassembly and maintenance.
Specifically, the upper end of the square corrugated tube 21 is provided with an upper square flange 40, the lower end of the square corrugated tube 21 is provided with a lower square flange 41, and the upper square flange 40 and the lower square flange 41 are respectively fixed at the lower end of the upper support plate 19 and the upper end of the lower support plate 16 by second screws 22. Therefore, the square corrugated pipe 21 is firmly and stably fixed, and after the square corrugated pipe 21 is installed, the protection effect on the first Hall sensor 42, the second Hall sensor 43, the laser ranging sensor 34 and the electromagnet 35 can be realized, and dust or muddy water is prevented from entering;
when the laser ranging device for measuring the change of the magnetic pole spacing is used, the specific use steps are as follows: firstly, after the mounting block 25 is inserted into the square countersunk through groove 23, the connector 37 on the square block 24 is screwed with the internal threaded hole 30 at the bottom of the mounting block 25, and finally, when the mounting block is completely locked, the limiting cover 26 is clamped into the top of the square countersunk through groove 23, and the clamping plate 36 abuts against the lower end of the upper support plate 19, so that the mounting block 25 is firmly and stably fixed; when the connecting head 37 is screwed with the internal thread hole 30 at the bottom of the mounting block 25, the electrode block 32 is always tightly attached to the top of the connecting head 37 under the elastic force of the supporting spring 31, so that the power supply block 27 is in contact with the connecting head 37 for conducting electricity through the electrode block 32, and the positive electrode and the negative electrode on the connecting head 37 supply electricity to the laser ranging sensor 34 and the electromagnet 35 through the conducting wires.
Then, when weighing is carried out, the electromagnet 35 is caused to be close to the first hall sensor 42 and the second hall sensor 43, the hall electromotive force changes due to the change of the distance in the period, the first hall sensor 42 and the second hall sensor 43 output corresponding voltage values V1 and V2, the voltage values are collected by the data collection module 44 and then transmitted to the data receiving module 46 through the data transmission module 45, and finally transmitted to the data processing module 47 through the data receiving module 46, and calculation processing is carried out according to software built in the data processing module 47; the target distance d1 can be obtained after calculation, and d1 is the distance between the electromagnet 35 and the first hall sensor 42.
Finally, a laser pulse is first emitted by the laser ranging sensor 34 in alignment with the first hall sensor 42 by the laser diode. The laser light is scattered in all directions after being reflected by the first hall sensor 42. Part of the scattered light returns to the sensor receiver, is received by the optical system and is imaged onto the avalanche photodiode. An avalanche photodiode is an optical sensor with an amplification function inside, and can detect extremely weak optical signals. The time elapsed from the emission of the light pulse to the return being received is recorded and processed, i.e. the target distance d2 is determined, d2 being the distance between the electromagnet 35 and the first hall sensor 42.
The average of d1 and d2 is calculated to obtain the final d value, and different d values represent different loads of the vehicle. Therefore, the vehicle load can be detected, and the measurement is convenient and quick and is accurate. Specifically, the software has the following calculation formula:
V1= K*C/d2；
V2= K*C/(d+r)2；
V1/V2=(d+r)2/d2=(1+r/d)；
r/d=
- 1；
d=r/（
- 1）；
wherein V1 and V2 are voltage values output by the first hall sensor 42 and the second hall sensor 43; r is the distance between the first hall sensor 42 and the second hall sensor 43; d is the distance between the electromagnet 35 and the first hall sensor 42; along with the light weight of the vehicle load, the electromagnet 35 is driven to move up and down relative to the ground, the value of d can be changed, different values of d represent different loads of the vehicle, and therefore the vehicle load can be detected. K is the magnetic field coefficient and C is the magnetic field strength of the electromagnet 35. When the invention is used, the integral structure occupies small space, and is convenient to disassemble and assemble; the installation of the installation block is firm and stable, and the laser ranging sensor and the electromagnet are powered by electrifying after installation, so that the installation is quick; the distance d between the electromagnet and the first Hall sensor is measured in two ways, the measurement is convenient and fast, the average value is finally calculated, and the accurate d value is obtained, so that the error caused by a single measurement means can be avoided, and the accuracy of vehicle load measurement is improved.
In summary, the laser distance measuring device for measuring the change of the magnetic pole distance is provided with the buffer spring inside the square corrugated pipe, the buffer spring has the buffer effect, so that the damage to the first hall sensor, the second hall sensor, the laser distance measuring sensor and the electromagnet caused by bumping in the driving process of the vehicle is prevented, the load measurement is carried out when the vehicle is static, and the buffer spring does not cause the up-and-down movement of the positions of the first hall sensor, the second hall sensor, the laser distance measuring sensor and the electromagnet under the condition of force balance, so that the accuracy of the load measurement is not influenced; the measurement is convenient and quick, the average value is finally calculated to obtain an accurate average value, so that the error caused by a single measurement means can be avoided, and the accuracy of the vehicle load measurement is improved; after the square corrugated pipe is installed, the protection effect on the first Hall sensor, the second Hall sensor, the laser ranging sensor and the electromagnet can be realized, dust or muddy water is prevented from entering, and the service life is prolonged.
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 (8)
1. The utility model provides a measure laser rangefinder of magnetic pole interval change, includes bumper shock absorber and monitoring module, its characterized in that: the shock absorber comprises a shock absorption piston cylinder (9) fixedly connected with the wheel assembly, a fixed flange seat (2) fixedly connected with the vehicle chassis and a piston rod (5) connected with the output end of the shock absorption piston cylinder (9);
an upper positioning ring seat (4) is arranged at the bottom of the fixed flange seat (2), a lower positioning ring seat (7) is arranged at the top of the damping piston cylinder (9), a limiting ring (8) is arranged on the outer side of the bottom of the lower positioning ring seat (7), the top of the piston rod (5) is connected to the lower end of the upper positioning ring seat (4), and the piston rod (5) is sleeved with a damping spring (6);
the upper positioning ring seat (4) and the lower positioning ring seat (7) are respectively sleeved with an upper ring seat (17) and a lower ring seat (14), and the side edges of the upper ring seat (17) and the lower ring seat (14) are respectively provided with an upper supporting plate (19) and a lower supporting plate (16);
the monitoring module comprises a first Hall sensor (42), a second Hall sensor (43), a laser ranging sensor (34), an electromagnet (35), a data acquisition module (44), a data transmission module (45), a data receiving module (46) and a data processing module (47) which are integrated on a vehicle-mounted central control screen; the first Hall sensor (42) and the second Hall sensor (43) are sequentially fixed on the side edge of the mounting seat (20) at the upper end of the lower supporting plate (16), the laser ranging sensor (34) and the electromagnet (35) are mounted inside the cylindrical head (33), the upper end of the cylindrical head (33) is provided with a square block (24), the middle part of the upper end of the square block (24) is provided with a connecting head (37), and the connecting head (37) is in threaded connection with an internal threaded hole (30) at the bottom of the mounting block (25);
the top of the mounting block (25) is provided with a limiting cover (26), the mounting block (25) is inserted into a square countersunk through groove (23) on the upper support plate (19), two sides of the upper end of the square block (24) are provided with clamping plates (36), the top of a cavity (38) in the mounting block (25) is provided with a power supply block (27), the top of the cavity (38) is provided with a support spring (31), the lower end of the support spring (31) is connected with an electrode block (32), two sides of the electrode block (32) are provided with sliding connection plates (29), and the sliding connection plates (29) are slidably connected in sliding grooves (28) on the side wall of the cavity (38);
the first Hall sensor (42), the second Hall sensor (43) and the laser ranging sensor (34) are electrically connected with the data acquisition module (44), the output end of the data acquisition module (44) is connected with the input end of the data transmission module (45), and the data transmission module (45) is connected with the data processing module (47) through the data receiving module (46).
2. A laser ranging apparatus for measuring a change in a magnetic pole pitch as claimed in claim 1, wherein: the upper end and the lower end of the damping spring (6) are respectively inserted into the upper positioning ring seat (4) and the lower positioning ring seat (7), the limiting ring (8) and the damping piston cylinder (9) are integrally formed, the upper ring seat (17) and the upper supporting plate (19) are also integrally formed, and the upper ring seat (17) is fixed on the upper positioning ring seat (4) through a second bolt (18); the lower ring seat (14) and the lower support plate (16) are integrally formed, and the lower ring seat (14) is fixed on the lower positioning ring seat (7) through a third bolt (15); the damping piston cylinder (9) is inserted into the fixed cylinder (10), the side edge of the lower part of the fixed cylinder (10) is connected with the wheel assembly through a connecting arm (12), the side edge of the upper part of the fixed cylinder (10) is provided with a groove, the two sides of the groove are provided with fastening plates (13) which are integrally formed with the fixed cylinder (10), and the two fastening plates (13) are connected through a first screw (11).
3. A laser ranging apparatus for measuring a change in a magnetic pole pitch as claimed in claim 1, wherein: the fixing flange seat (2) is fixed on a vehicle chassis through a first bolt (3), a pin column (1) on the top of the fixing flange seat (2) is inserted into a corresponding pin hole in the vehicle chassis, and the pin column (1), the fixing flange seat (2) and an upper positioning ring seat (4) are integrally formed.
4. A laser ranging apparatus for measuring a change in a magnetic pole pitch as claimed in claim 1, wherein: a square corrugated pipe (21) is arranged between the upper supporting plate (19) and the lower supporting plate (16), a buffer spring (39) is arranged inside the square corrugated pipe (21), and the buffer spring (39) is arranged on the outer side of the square block (24).
5. A laser ranging apparatus for measuring a change in a magnetic pole pitch as claimed in claim 1, wherein: power supply piece (27), supporting spring (31), electrode piece (32) all are same vertical axis setting, and power supply piece (27), supporting spring (31), electrode piece (32) are in cavity (38) are setting between two parties, and are located directly over internal thread hole (30).
6. The laser distance measuring device for measuring the change of the magnetic pole pitch as claimed in claim 4, wherein: the square corrugated pipe is characterized in that an upper square flange (40) is arranged at the upper end of the square corrugated pipe (21), a lower square flange (41) is arranged at the lower end of the square corrugated pipe (21), and the upper square flange (40) and the lower square flange (41) are respectively fixed at the lower end of an upper supporting plate (19) and the upper end of a lower supporting plate (16) through second screws (22).
7. A ranging method of a laser ranging apparatus for measuring a change in a magnetic pole pitch according to any one of claims 1 to 6, wherein: the method comprises the following steps:
firstly, inserting the mounting block (25) into the square countersunk through groove (23), then screwing the connector (37) on the square block (24) into the internal threaded hole (30) at the bottom of the mounting block (25), finally, when the mounting block is completely locked, clamping the limiting cover (26) into the top of the square countersunk through groove (23), and abutting the clamping plate (36) against the lower end of the upper support plate (19);
step two, when the connector (37) is screwed in the internal threaded hole (30) at the bottom of the mounting block (25), under the action of the elastic force of the supporting spring (31), the electrode block (32) is always attached to the top of the connector (37) in a clinging manner, so that the power supply block (27) is in contact with the connector (37) through the electrode block (32) for conduction, and positive and negative electrodes on the connector (37) supply power to the laser ranging sensor (34) and the electromagnet (35) through leads;
step three, when weighing is carried out, the electromagnet (35) is caused to be close to the first Hall sensor (42) and the second Hall sensor (43), Hall electromotive force changes are caused by distance changes in the period, the first Hall sensor (42) and the second Hall sensor (43) output corresponding voltage values V1 and V2, the voltage values are collected through the data collection module (44), transmitted to the data receiving module (46) through the data transmission module (45), and finally transmitted to the data processing module (47) through the data receiving module (46), calculation processing is carried out according to software built in the data processing module (47), and a target distance d1 is obtained, wherein d1 is the distance between the electromagnet (35) and the first Hall sensor (42);
step four, the laser ranging sensor (34) is aligned to the first Hall sensor (42) through a laser diode to emit laser pulses, the laser is scattered in all directions after being reflected by the first Hall sensor (42), part of scattered light returns to a sensor receiver, is received by an optical system and then is imaged on an avalanche photodiode, the avalanche photodiode is used for detecting optical signals, the time from the emission of the optical pulses to the return of the optical pulses to the reception is recorded and processed, and the target distance d2 is determined, wherein d2 is the distance between the electromagnet (35) and the first Hall sensor (42);
and step five, averaging d1 and d2 to calculate final d values, wherein different d values represent different loads of the vehicle.
8. The use method of the laser distance measuring device for measuring the change of the magnetic pole spacing as claimed in claim 7, wherein: the formula of the calculation processing of the built-in software of the data processing module (47) is as follows:
V1= K*C/d2；
V2= K*C/(d+r)2；
V1/V2=(d+r)2/d2=(1+r/d)；
r/d=
- 1；
d=r/（
- 1）；
wherein V1 and V2 are voltage values output by the first Hall sensor (42) and the second Hall sensor (43); r is the distance between the first hall sensor (42) and the second hall sensor (43); d is the distance between the electromagnet (35) and the first Hall sensor (42); k is the magnetic field coefficient and C is the magnetic field of the electromagnet (35).
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| CN114166325A (en) * | 2021-12-07 | 2022-03-11 | 南京智鹤电子科技有限公司 | Magnetic field intensity measuring system and measuring method for vehicle load monitoring |
| CN115839668B (en) * | 2023-02-16 | 2023-04-25 | 山西仲测计量研究院有限公司 | Mechanical part hole spacing measuring device |
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