Motor vehicle traffic flow detection device

Abstract

The invention relates to the technical field of traffic equipment, in particular to a motor vehicle traffic flow detection device which solves the problems that when an existing traffic flow detection device is installed, a road surface is damaged, and the existing traffic flow detection device is not suitable for detecting two-wheeled motor vehicles. A second inner connecting rod is fixed in the first base, the two ends of the second inner connecting rod penetrate out of the side face of the first base, a power connection frequency detector and a first inner connecting rod are fixed in the third base, one end of the first inner connecting rod is fixed to the negative electrode of the power connection frequency detector, and the other end of the first inner connecting rod penetrates out of the side face of the third base. The vehicle traffic flow detection method and the vehicle traffic flow detection device have the advantages that the vehicle traffic flow is detected by detecting the number of wheels, the vehicle traffic flow detection method and the vehicle traffic flow detection device are not only suitable for flow detection of four-wheel motor vehicles, but also suitable for flow detection of two-wheel motor vehicles, and the application range is wider.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic equipment, and in particular to a motor vehicle traffic flow detection device. Background Art

[0002] Motor vehicles refer to wheeled vehicles that are driven or towed by a power unit and travel on roads for passengers or for transporting goods or for special engineering operations, including automobiles, trams, electric vehicles, motorcycles, transport vehicles, etc.

[0003] Traffic flow detection device is a device used to detect the number and flow of vehicles on the road. It can obtain the operation data of vehicles on the road, such as the number of vehicles, speed, lane occupancy, etc., through sensors and other equipment. When the traffic flow detection device is used, it is necessary to dig a hole on the road surface, and then fill the traffic flow detection device into the hole. After use, the traffic flow detection device is dug out;

[0004] The existing traffic flow detection devices have some defects. First, they need to dig holes and damage the road surface when in use, which is not suitable for temporary detection of road traffic flow. Second, the existing traffic flow detection devices cannot be placed in multiple locations closely, and the intervals between multiple two-wheeled motor vehicles are smaller, and two-wheeled motor vehicles are more dense. Therefore, most detectors are only suitable for detecting four-wheeled motor vehicles, and are not suitable for detecting the traffic flow of two-wheeled motor vehicles.

[0005] Therefore, the present invention provides a motor vehicle traffic flow detection device to solve the above-mentioned problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a motor vehicle traffic flow detection device to solve the problem that the existing traffic flow detection device damages the road surface during installation and is not suitable for detecting two-wheeled motor vehicles.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A motor vehicle traffic flow detection device comprises a slope, a first base, a detector and a third base;

[0009] First base: a second inner connecting rod is fixed inside the first base, and both ends of the second inner connecting rod pass through the side surface of the first base;

[0010] The third base: a power-on times detector and a first inner connecting rod are fixed in the third base, one end of the first inner connecting rod is fixed to the negative pole of the power-on times detector, and the other end of the first inner connecting rod passes through the side surface of the third base;

[0011] Slope: The linear array of the slope is between the first base and the third base, and the slope has two rows and is respectively sandwiched between the two ends of the first base and the third base;

[0012] Two rows of detectors are fixed between the slope, the first base and the third base, and the two rows of detectors are staggered front and back and placed in opposite directions;

[0013] Detector: The detector includes a second base, a rotating plate, a fourth base, a first spring, a power connection plate, a power connection rod, a power connection wire and a power connection block. The two ends of the second base are provided with power connection rods in a rectangular array. The power connection rods at the two ends of the second base correspond to each other on the left and right. The ends of the left and right power connection rods close to each other are clamped and fixed with power connection blocks. The left and right power connection blocks are in contact with each other and energized. The side of the power connection rod that contacts the power connection block is coated with an insulating layer. A power connection wire is fixed between the power connection rod and the power connection block and is electrically connected through the power connection wire. A fixing assembly is installed between the two ends of the second base, wherein the left and right power connection blocks are fixed in the fixing assembly, and there is a gap between the two power connection blocks in the fixing assembly. The side of the second base is provided with an inclined surface and the lower end of the inclined surface is fixed with the fourth base. A rotating plate is rotated in the fourth base through a rotating shaft. The first spring is fixed between the rotating plate and the base. The other end of the rotating plate is located above the inclined surface of the second base. A power connection plate is fixed on the lower side of the rotating plate, and the power connection plate is located directly above the two power connection blocks in the fixing assembly.

[0014] The connecting rods in two adjacent detectors in the same row of detectors are in contact with each other and energized, the connecting rod in the detector at the rear of one row is electrically connected to the negative pole of the detector of the number of times of power connection, the connecting rod in the detector at the front of the two rows is respectively in contact with the two ends of the second inner connecting rod, and the connecting rod in the detector at the rear of the other row is in contact with one end of the first inner connecting rod;

[0015] The slope, the first base, the detector and the third base are fixed together by a clamping assembly;

[0016] Through the above technical solution, when the wheel passes over the rotating plate, it will press the rotating plate downward, and the rotating plate drives the power connection plate to rotate downward, and the power connection plate contacts the two power connection blocks, thereby energizing the two power connection blocks, energizing the power connection rods in the two detectors, and the current passes through the first inner connecting rod and the second inner connecting rod, so that the current flows through the positive and negative electrodes of the power connection number detector, and the power connection number detector generates an electrical signal, thereby detecting the passage of the vehicle;

[0017] The wheels of some vehicles will directly pass through the rotating plate on a detector and generate an electrical signal, while the wheels of some vehicles will pass between the rotating plates of two detectors and generate two electrical signals. In order to avoid the problem of deviation in the value of the electrical signal when detecting the number of vehicles, the two rows of detectors are staggered and placed in opposite directions. On the one hand, the wheels must pass through three detectors, that is, three electrical signals represent one wheel passing, and the detection value is more accurate. On the other hand, it can detect not only vehicles passing from left to right, but also vehicles passing from right to left.

[0018] Furthermore, the number of detectors and slopes can be adjusted, so that the overall width of the device can be adjusted, so that the device can be applied to roads of various widths.

[0019] Preferably, the fixing assembly includes a clamping rod, a contact plate and a second spring, the clamping rod has two clamping rods and is respectively and laterally movably inserted into the two ends of the second base, the two clamping rods are arranged correspondingly, a placement groove is arranged on the side where the two clamping rods are close to each other, the power connection block is placed in the placement groove, a second spring is fixed between the clamping rod and the end of the second base, and a contact plate is fixed on the ends where the two clamping rods are close to each other, and the two contact plates are butted against each other;

[0020] Through the above technical solution, the second spring pushes the clamping rod, so that the two clamping rods are close to each other, and then the two power connection blocks are close to each other, and the two contact plates are connected to each other, so that the two power connection blocks are close to each other but not in contact with each other, thereby fixing the power connection blocks.

[0021] Preferably, a second notch is provided on the side of the placement groove of the clamping rod;

[0022] Through the above technical solution, the second notch can be used to conveniently place the connection wire on the connection block.

[0023] Preferably, the clamping assembly comprises an inner through hole, a first inner clamping rod, a second inner clamping rod, a third spring and a clamping hole, the inner through hole is arranged in the slope, the first base and the third base, the second inner clamping rod is threadedly inserted in the inner through hole, the first inner clamping rod is movably passed through the side of the inner through hole in the slope, the ends of the first inner clamping rod and the second inner clamping rod are conical, the second inner clamping rod pushes the first inner clamping rod out of the inner through hole, a third spring is fixed between the lower end of the first inner clamping rod and the slope, the clamping hole is arranged in the fourth base, and the first inner clamping rod is downwardly inserted into the clamping hole;

[0024] Through the above technical solution, when the second inner clamping rod is rotated, the second inner clamping rod thread is inserted between the two slopes, the second inner clamping rod thread is inserted between the slope and the first base, and the second inner clamping rod thread is inserted between the slope and the first base, so that the first base, the third base and the two rows of slopes are fixed to each other, and the second inner clamping rod pushes the first inner clamping rod out of the inner through hole, so that the first inner clamping rod is downwardly inserted into the clamping hole, so that the fourth base can be fixed on the first inner clamping rod, and then the detector is fixed on the slope, and the third spring pulls the first inner clamping rod upward, so that the detector is pulled upward, so that the detector is always close to the slope, ensuring the fit between the detector and the slope.

[0025] Preferably, a convex portion is integrally formed on the side of the first inner clamping rod, a downwardly inclined contact surface is provided on the side of the clamping hole, an upper side of the convex portion abuts against the downwardly inclined contact surface of the clamping hole, and the first inner clamping rod is made of plastic and is bendable;

[0026] Through the above technical solution, the first inner clamping rod can be bent to remove the first inner clamping rod from the clamping hole, and then the detector can be disassembled.

[0027] Preferably, a shielding portion is fixed to the end of the rotating plate, the shielding portion is located between the two ends of the second base, and the shielding portion is located directly above the fixing assembly and the power connection block;

[0028] Through the above technical solution, the shielding part reduces the dust and other debris falling into the detector, and protects components such as the power connection block.

[0029] Preferably, a snap-on assembly is installed between the two rows of detectors;

[0030] The buckle assembly includes a card block and a card slot, wherein the card slot is arranged at two corners of the second base away from the fourth base, and the card block is fixed in the middle of the second base away from the fourth base, wherein the card block on the detector in one row is laterally movable and inserted into the card slot on the detector in another row;

[0031] Through the above technical solution, the buckle assembly can limit the two rows of detectors to prevent one row of detectors from shaking up and down relative to the other row of detectors, that is, improve the installation stability of the detectors.

[0032] Preferably, a first notch is provided on the side surface of the end of the connecting rod;

[0033] Through the above technical solution, the first notch is convenient for placing the connecting wires.

[0034] The beneficial effects of the present invention are:

[0035] 1. When the wheel passes over the rotating plate, it will press the rotating plate downward, and the rotating plate will drive the power board to rotate downward. The power board contacts the two power blocks, and then the two power blocks are energized, so that the power rods in the two detectors are energized, and the current passes through the first inner connecting rod and the second inner connecting rod, so that the current flows through the positive and negative electrodes of the power connection number detector, and the power connection number detector generates an electrical signal, thereby realizing the conventional detection function of the detector and detecting the passing of the vehicle;

[0036] 2. The two rows of detectors are staggered and placed in opposite directions. On the one hand, the wheels must pass through three detectors, that is, three electrical signals represent one wheel passing, and the detection value is more accurate. On the other hand, it can detect not only vehicles passing from left to right, but also vehicles passing from right to left.

[0037] 3. The number of detectors and slopes can be adjusted, which means that the overall width of the device can be adjusted, making the device applicable to roads of various widths;

[0038] In summary, this device can be placed directly on the road surface without damaging the road surface, and is more suitable for temporary or short-term traffic flow detection of vehicles. Moreover, this device utilizes the detection of the number of wheels to detect vehicle traffic flow, and is not only suitable for flow detection of four-wheeled motor vehicles, but also for flow detection of two-wheeled motor vehicles, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a stereogram of the present invention.

[0040] Figure 2 It is a side view of the present invention.

[0041] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA.

[0042] Figure 4 for Figure 3 A partial enlarged view of part B.

[0043] Figure 5 for Figure 3 A partial enlarged view of part C.

[0044] Figure 6 for Figure 2 Schematic diagram of the cross-sectional structure at DD.

[0045] Figure 7 for Figure 6 A partial enlarged view of part E.

[0046] Figure 8 for Figure 2 Schematic diagram of the cross-sectional structure at FF.

[0047] Fig. 9 for Figure 8 A partial enlarged view of part G.

[0048] Fig.10 It is a schematic diagram of the second base and its internal structure in the invention.

[0049] In the figure: 1, slope; 2, first base; 3, second base; 4, shielding part; 5, rotating plate; 6, third base; 7, fourth base; 8, first spring; 9, power connection board; 10, clamping block; 11, clamping groove; 12, power connection rod; 13, first notch; 14, connecting wire; 15, clamping rod; 16, second notch; 17, power connection block; 18, contact plate; 19, power connection times detector; 20, second spring; 21, first inner connecting rod; 22, second inner connecting rod; 23, inner through hole; 24, first inner clamping rod; 25, second inner clamping rod; 26, third spring; 27, protrusion; 28, clamping hole. DETAILED DESCRIPTION

[0050] The following will refer to the attached Figures 1 to 10 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0051] As attached Figure 1 -Attached Fig.10 As shown, a motor vehicle traffic flow detection device includes a ramp 1, a first base 2, a detector and a third base 6;

[0052] The first base 2 is in a stepped shape, that is, it has a thick end and a thin end. A second inner connecting rod 22 is fixed inside the first base 2. The second inner connecting rod 22 is in a U-shaped shape. One end of the second inner connecting rod 22 passes through the thick end of the first base 2, and the other end of the second inner connecting rod 22 passes through the thin end of the first base 2.

[0053] The third base 6 is in a stepped shape, that is, it has a thick end and a thin end. A connection times detector 19 is fixed inside the thick end of the third base 6, and a first inner connecting rod 21 is fixed inside the thin end of the third base 6. One end of the first inner connecting rod 21 is fixed to the negative pole of the connection times detector 19, and the other end of the first inner connecting rod 21 passes through the thin end of the third base 6.

[0054] Slope 1: The linear array of slope 1 is between the first base 2 and the third base 6, that is, there are two rows of slope 1 and they are sandwiched between the thick end and the thin end of the first base 2 and the third base 6, respectively. The slope 1, both ends of the first base 2 and both ends of the third base 6 are all provided with slopes for vehicles to travel. The sum of the difference between the thickness of the thick end and the thin end of the first base 2 plus the difference between the thickness of the thick end and the thin end of the third base 6 is equal to the width of the slope 1;

[0055] Two rows of detectors are fixed between the slope 1, the first base 2 and the third base 6. The width of the detectors is equal to the width of the slope 1. The two rows of detectors are staggered front and back and placed in opposite directions.

[0056] Detector: The detector includes a second base 3, a rotating plate 5, a fourth base 7, a first spring 8, a power board 9, a power rod 12, a power wire 14 and a power block 17. The two ends of the second base 3 are provided with power rods 12 in a rectangular array. The power rods 12 at the two ends of the second base 3 correspond to each other on the left and right. The ends of the left and right power rods 12 close to each other are clamped and fixed with a power block 17. The left and right power blocks 17 are in contact with each other and energized. The side of the power rod 12 contacting the power block 17 is coated with an insulating layer. The power wire 14 is fixed between the power rod 12 and the power block 17 and is electrically connected through the power wire 14. The end side of the power rod 12 is provided with a first notch 13 for placing the power wire 14. A fixed Assembly, remove any two contacting power blocks 17 from the power rod 12, fix the two removed power blocks 17 in the fixed assembly, there is a gap between the two power blocks 17 in the fixed assembly, the side of the second base 3 is provided with an inclined surface and the lower end of the inclined surface is fixed with a fourth base 7, a rotating plate 5 is rotated in the fourth base 7 through a rotating shaft, a shielding part 4 is fixed at the end of the rotating plate 5, the shielding part 4 is located between the two ends of the second base 3, the shielding part 4 is located directly above the fixed assembly and the power block 17, a first spring 8 is fixed between the rotating plate 5 and the base 7, the other end of the rotating plate 5 is located above the inclined surface of the second base 3, a power board 9 is fixed on the lower side of the rotating plate 5, and the power board 9 is located directly above the two power blocks 17 in the fixed assembly;

[0057] There are 10 connecting rods 12 in the detector, and their serial numbers are No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 7, No. 8, No. 9 and No. 10. For example, when the connecting block 17 on the No. 1 connecting rod 12 in one of the detectors is placed on the fixed component, the connecting blocks 17 on the No. 1 connecting rods 12 in other detectors are all immobile, so as to make electrical connection, that is, whether the circuit is flowing is only controlled by whether the two connecting blocks 17 on the fixed component are in contact with the connecting plate 9. Similarly, when the connecting block 17 on the No. 2 connecting rod 12 in one of the detectors is placed on the fixed component, the connecting blocks 17 on the No. 2 connecting rods 12 in other detectors are all immobile, and when the connecting block 17 on the No. 3 connecting rod 12 in one of the detectors is placed on the fixed component, the connecting blocks 17 on the No. 3 connecting rods 12 in other detectors are all immobile...

[0058] The connecting rods 12 in two adjacent detectors in the same row of detectors are in contact with each other and energized. The connecting rod 12 in the detector at the rear of one row is electrically connected to the negative pole of the power-on times detector 19. The connecting rod 12 in the detector at the front of the two rows is respectively in contact with both ends of the second inner connecting rod 22. The connecting rod 12 in the detector at the rear of the other row is in contact with one end of the first inner connecting rod 21.

[0059] The ramp 1, the first base 2, the detector and the third base 6 are fixed together by a snap-fit ​​assembly.

[0060] In this embodiment, the fixing assembly includes a clamping rod 15, a contact plate 18 and a second spring 20. There are two clamping rods 15, which are laterally movable and inserted into the two ends of the second base 3. The two clamping rods 15 are arranged correspondingly. A placement groove is arranged on the side where the two clamping rods 15 are close to each other. The power connection block 17 is placed in the placement groove. The second spring 20 is fixed between the clamping rod 15 and the end of the second base 3. The contact plate 18 is fixed on the end where the two clamping rods 15 are close to each other. The two contact plates 18 are connected to each other. A second notch 16 is arranged on the side of the placement groove of the clamping rod 15.

[0061] In this embodiment, the clamping assembly includes an inner through hole 23, a first inner clamping rod 24, a second inner clamping rod 25, a third spring 26 and a clamping hole 28. The inner through hole 23 is set in the slope 1, the first base 2 and the third base 6. The second inner clamping rod 25 is threadedly inserted in the inner through hole 23. The first inner clamping rod 24 is movably passed through the side of the inner through hole 23 in the slope 1. The ends of the first inner clamping rod 24 and the second inner clamping rod 25 are conical. The second inner clamping rod 25 pushes the first inner clamping rod 24 out of the inner through hole 23. The third spring 26 is fixed between the lower end of the first inner clamping rod 24 and the slope 1. The clamping hole 28 is set in the fourth base 7, and the first inner clamping rod 24 is downwardly inserted into the clamping hole 28.

[0062] A protrusion 27 is integrally formed on the side of the first inner clamping rod 24 , and a downwardly inclined contact surface is provided on the side of the clamping hole 28 . The upper side of the protrusion 27 abuts against the downwardly inclined contact surface of the clamping hole 28 . The first inner clamping rod 24 is made of plastic and is bendable.

[0063] In this embodiment, a snap-on assembly is installed between the two rows of detectors;

[0064] The snap assembly includes a card block 10 and a card slot 11. The card slot 11 is arranged at two corners of the second base 3 away from the fourth base 7. The card block 10 is fixed in the middle of the end of the second base 3 away from the fourth base 7. The card block 10 on the detector in one row can be moved horizontally and inserted into the card slot 11 on the detector in another row.

[0065] The working principle of this device is:

[0066] After the wheel passes the slope 1, it rolls on the rotating plate 5, pressing the rotating plate 5 downward, and the rotating plate 5 drives the power board 9 to move downward until the rotating plate 5 hits the inclined surface of the second base 3. At this time, the power board 9 just contacts the power block 17 between the two clamping rods 15. At this time, the current passes through the power connection number detector 19, one row of power connection rods 12, the power connection block 17, the power connection plate 9, the second inner connecting rod 22, another row of power connection rods 12, the power connection block 17 and the first inner connecting rod 21, so that the power connection number detector 19 detects the power connection signal and transmits the signal to the remote control center, thereby detecting that a wheel passes over the device;

[0067] Then the wheel rolls onto the second base 3, and then onto another row of detectors. At this time, the wheel presses down the rotating plates 5 in the two detectors, thereby generating two power-on signals, and then the wheel rolls down from another row of slopes 1;

[0068] That is, when the wheel first rolls onto one of the detectors in a row, the wheel will definitely roll back onto two of the detectors in another row. When the wheel first rolls onto two of the detectors in a row, the wheel will definitely roll back onto one of the detectors in another row. That is, a total of three electrical signals are generated when a wheel rolls over this device.

[0069] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0070] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A motor vehicle traffic flow detection device, characterized in that: It comprises a slope (1), a first base (2), a detector and a third base (6); A first base (2): a second inner connecting rod (22) is fixed inside the first base (2), and both ends of the second inner connecting rod (22) pass through the side surface of the first base (2); A third base (6): a power-on number detector (19) and a first inner connecting rod (21) are fixed inside the third base (6); one end of the first inner connecting rod (21) is fixed to the negative pole of the power-on number detector (19), and the other end of the first inner connecting rod (21) passes through a side surface of the third base (6); The slope (1) is arranged in a linear array between the first base (2) and the third base (6), and the slope (1) has two rows and is respectively sandwiched between the first base (2) and the ends of the third base (6); two rows of detectors are fixed between the slope (1), the first base (2) and the third base (6), and the two rows of detectors are staggered front and back and placed in opposite directions; Detector: The detector comprises a second base (3), a rotating plate (5), a fourth base (7), a first spring (8), a power connection plate (9), a power connection rod (12), a power connection wire (14) and a power connection block (17); both ends of the second base (3) are provided with power connection rods (12) in a rectangular array; the power connection rods (12) at both ends of the second base (3) correspond to each other on the left and right; the power connection blocks (17) are clamped and fixed at one end of the left and right power connection rods (12) close to each other; the left and right power connection blocks (17) are in contact with each other and energized; the side of the power connection rod (12) contacting the power connection block (17) is coated with an insulating layer; a power connection wire (14) is fixed between the power connection rod (12) and the power connection block (17) and is connected to the power connection wire by the power connection wire. (14) for electrical connection, a fixing assembly is installed between the two ends of the second base (3), wherein the left and right power connection blocks (17) are fixed in the fixing assembly, and a gap is formed between the two power connection blocks (17) in the fixing assembly, a side surface of the second base (3) is provided with an inclined surface, and a fourth base (7) is fixed at the lower end of the inclined surface, a rotating plate (5) is rotated in the fourth base (7) through a rotating shaft, a first spring (8) is fixed between the rotating plate (5) and the base (7), the other end of the rotating plate (5) is located above the inclined surface of the second base (3), and a power connection plate (9) is fixed on the lower side of the rotating plate (5), and the power connection plate (9) is located directly above the two power connection blocks (17) in the fixing assembly; The connecting rods (12) in two adjacent detectors in the same row of detectors are in contact with each other and are energized, wherein the connecting rod (12) in the detector at the rear of one row is electrically connected to the negative pole of the power-on times detector (19), the connecting rod (12) in the detector at the front of the two rows is respectively in contact with the two ends of the second inner connecting rod (22), and the connecting rod (12) in the detector at the rear of the other row is in contact with one end of the first inner connecting rod (21); The ramp (1), the first base (2), the detector and the third base (6) are fixed together by a snap-fit ​​assembly.

2. A motor vehicle traffic flow detection device according to claim 1, characterized in that: The fixing assembly comprises a clamping rod (15), a contact plate (18) and a second spring (20). The clamping rod (15) has two clamping rods (15) and is respectively and transversely movably inserted into the two ends of the second base (3). The two clamping rods (15) are arranged correspondingly. A placement groove is arranged on the side where the two clamping rods (15) are close to each other. The power connection block (17) is placed in the placement groove. The second spring (20) is fixed between the clamping rod (15) and the end of the second base (3). The contact plate (18) is fixed on the end where the two clamping rods (15) are close to each other. The two contact plates (18) are butt-jointed with each other.

3. A motor vehicle traffic flow detection device according to claim 2, characterized in that: A second notch (16) is provided on the side of the placement groove of the clamping rod (15).

4. A motor vehicle traffic flow detection device according to claim 1, characterized in that: The clamping assembly comprises an inner through hole (23), a first inner clamping rod (24), a second inner clamping rod (25), a third spring (26) and a clamping hole (28). The inner through hole (23) is arranged in the slope (1), the first base (2) and the third base (6). The second inner clamping rod (25) is threadedly inserted into the inner through hole (23). The first inner clamping rod (24) is movably passed through the side of the inner through hole (23) in the slope (1). The ends of the first inner clamping rod (24) and the second inner clamping rod (25) are conical. The second inner clamping rod (25) pushes the first inner clamping rod (24) out of the inner through hole (23). The third spring (26) is fixed between the lower end of the first inner clamping rod (24) and the slope (1). The clamping hole (28) is arranged in the fourth base (7). The first inner clamping rod (24) is downwardly inserted into the clamping hole (28).

5. A motor vehicle traffic flow detection device according to claim 4, characterized in that: A protrusion (27) is integrally formed on the side of the first inner clamping rod (24), a downwardly inclined contact surface is provided on the side of the clamping hole (28), the upper side of the protrusion (27) abuts against the downwardly inclined contact surface of the clamping hole (28), and the first inner clamping rod (24) is made of plastic and is bendable.

6. The vehicle traffic flow detection device according to claim 1, characterized in that: A shielding portion (4) is fixed to the end of the rotating plate (5), the shielding portion (4) is located between the two ends of the second base (3), and the shielding portion (4) is located directly above the fixing assembly and the power connection block (17).

7. The vehicle traffic flow detection device according to claim 1, characterized in that: A snap-on assembly is installed between the two rows of detectors; The buckle assembly comprises a card block (10) and a card slot (11), wherein the card slot (11) is arranged at two corners of the second base (3) at one end away from the fourth base (7), and the card block (10) is fixed in the middle of the end of the second base (3) away from the fourth base (7), wherein the card block (10) on the detector in one row is laterally movable and inserted into the card slot (11) on the detector in another row.

8. The vehicle traffic flow detection device according to claim 1, characterized in that: A first notch (13) is provided on the side surface of the end of the connecting rod (12).

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