CN109591674B

CN109591674B - Reflective unit releasing device of FTIR open light path detection vehicle

Info

Publication number: CN109591674B
Application number: CN201811470781.5A
Authority: CN
Inventors: 李相贤; 韩昕; 高闽光; 石建国; 童晶晶; 王亚平; 陈军; 李妍; 刘建国; 刘文清
Original assignee: Hefei Institutes of Physical Science of CAS
Current assignee: Hefei Institutes of Physical Science of CAS
Priority date: 2018-12-04
Filing date: 2018-12-04
Publication date: 2020-06-02
Anticipated expiration: 2038-12-04
Also published as: CN109591674A

Abstract

The invention belongs to the technical field of atmospheric movement detection, and particularly relates to a reflecting unit releasing device of an FTIR open light path detection vehicle. The invention realizes the transfer of the reflection unit between the vehicle body and the ground by using the ramp, has light operation and simple operation process, does not need too much manpower, can realize all operation processes by a single person, and greatly improves the detection efficiency of the atmospheric flow detection in the park.

Description

Reflective unit releasing device of FTIR open light path detection vehicle

Technical Field

The invention belongs to the technical field of atmospheric movement detection, and particularly relates to a reflecting unit releasing device of an FTIR open light path detection vehicle.

Background

In recent years, with the continuous development of industrial production scale in China, the emission of industrial gas becomes an important subject of air quality supervision, the environmental awareness of most production-type enterprises is gradually enhanced, the enterprises not only need to actively carry out harmless treatment on the industrial gas emitted by the enterprises, but also need to strictly monitor the air quality around the factories, and the influence of industrial production on the surrounding environment is avoided, so that more advanced and reliable air quality detection equipment is actively introduced by all parties. An FTIR open optical path detection system is a novel high-efficiency, stable and reliable atmospheric detection means which is made in recent years, and the principle of the FTIR open optical path detection system is that different components in air are utilized to have different absorption characteristics on infrared signals, so that components in the atmosphere are accurately analyzed by utilizing infrared absorption spectrum. For detailed working principle of the FTIR infrared spectrum detection system, the following published patents and patent applications can be referred to: an open light path atmosphere detection system integrated with transmitting and receiving is disclosed in application number: 201710516667.0, respectively; a portable multi-component gas infrared spectroscopy detection system, application No. 201710451349.0.

The FTIR open optical path detection system can realize rapid and accurate detection of atmospheric components in a certain area, and the equipment in the prior art can only be installed on a ground base generally, and can only detect the atmospheric components in the specific area after being installed in place, so that the target of flow detection is difficult to realize, and the use value of the FTIR open optical path detection system cannot be exerted to the maximum extent. It is therefore desirable to design an FTIR open optical path detection vehicle for flow detection that needs to carry a set of independently movable reflective units that should be easily translatable and fixable between the vehicle body and the ground.

Disclosure of Invention

The invention aims to provide a reflecting unit releasing device of an FTIR open optical path detection vehicle, which is convenient for a reflecting unit to transfer between the detection vehicle and the ground.

In order to achieve the purpose, the invention provides the following technical scheme: a reflecting unit releasing device of an FTIR open light path detection vehicle comprises a sliding plate, wherein the sliding plate is arranged in a sliding mode along the length direction of a vehicle body, and when the front end of the sliding plate slides to the tail of the vehicle body, the sliding plate can enable the rear end of the sliding plate to swing downwards by taking the front end as a rotating shaft, so that a ramp for the reflecting unit to move up and down is formed between the vehicle body and the ground.

The reflection unit is installed on a lifting trolley, a traction device for drawing the lifting trolley is arranged at the front end of the sliding plate, and a locking device for fixing the lifting trolley is arranged on the sliding plate.

The center of the sliding plate is provided with a traction groove, the traction device comprises a chain arranged in the traction groove, the chain is connected end to end, two ends of the traction groove are respectively provided with a chain wheel, the chain is tensioned between the two chain wheels, and the chain wheel positioned at the front end of the sliding plate is connected with a traction motor through a speed reducing mechanism; the chain is fixed with a sliding block, the sliding block is arranged in the traction groove in a sliding mode, the sliding block is provided with a towing hook, and the lifting trolley is provided with a hook ring matched with the towing hook.

The towing hook comprises a hook plate and a swing rod, one section of the swing rod is hinged with the sliding block, the other end of the swing rod is fixed on the hook plate, a guide pin vertical to the swing rod is arranged on a rod body of the swing rod, the guide pin is arranged in a mode of extending towards two sides of the traction groove in a hanging mode, guide strips are arranged on two sides of the notch of the traction groove, the guide strips protrude out of the surface of the sliding plate, and a ramp way which is in inclined transition towards the surface of the sliding plate is arranged at the rear end of; the guide pin is lapped on the guide strip, and when the sliding block slides to the rear end of the sliding plate, the guide pin can slide on the sliding plate along the ramp, so that the swing rod of the towing hook swings downwards, and the hook plate is automatically separated from the hook ring on the lifting cart.

The locking device comprises a locking pin which is arranged in a telescopic mode along the direction perpendicular to the surface of the sliding plate, and pin holes matched with the locking pin are formed in the two sides of the lifting cart.

A linkage mechanism is arranged between the locking pin and the sliding plate, the linkage mechanism is assembled to drive the locking pin to be drawn out of the pin hole when the rear end of the sliding plate is contacted with the ground, and the linkage mechanism can drive the locking pin to be inserted into the pin hole when the rear end of the sliding plate is separated from the ground.

The linkage mechanism comprises a first connecting rod, a second connecting rod, a first lever and a second lever; one end of the first connecting rod is hinged with the other end of the locking pin, the other end of the first connecting rod is hinged with one end of the first lever, the middle of the first lever is hinged with a first hinged support arranged in the sliding plate, the other end of the first lever is hinged with one end of the second connecting rod, the other end of the second connecting rod is hinged with one end of the second lever, the middle of the second lever is hinged with a second hinged support in the sliding plate, the other end of the second lever is provided with a trigger rod, the bottom of the rear end of the sliding plate is provided with a chamfer, when the rear end of the sliding plate is in lap joint with the ground, the slope of the chamfer is flush with the ground, the trigger rod protrudes out of the slope of the chamfer, a torsion spring is arranged on a rotating shaft of the second lever, the trigger rod is flush with the surface of the sliding plate in a normal state, and when the slope of the chamfer is attached to the ground, the trigger rod can swing, The first link moves to pull the locking pin downward.

The tail part of the bottom plate of the vehicle body is provided with a slideway matched with two sides of the sliding plate, the slideway is composed of two channel steel with opposite notches, and two sides of the sliding plate are provided with rollers matched with the walls of the slideway; the roller is provided with three pairs, wherein two pairs of rollers are respectively arranged at the front end and the rear end of the sliding plate, the other pair of rollers is arranged between the front pair of rollers and the rear pair of rollers and is close to one pair of rollers at the front end of the sliding plate, and the pair of rollers is a middle roller; the wheel shaft of the middle roller is arranged to protrude a certain distance to the outer side of the roller, the inner side wall of the slideway is provided with a limiting block, and the limiting block is arranged to avoid the roller at the rear end of the slideway and can block the protruding part of the wheel shaft of the middle roller; the tail end of the top wall of the slide way is also provided with a gap part, and when the wheel shaft of the middle roller is blocked by the limiting block, the roller at the front end of the sliding plate just faces the gap part.

Still be equipped with locking mechanism between slide and the slide, locking mechanism includes along the flexible bolt that sets up of slide width direction in slide rear end both sides to and the slide roof on set up with bolt complex baffle.

The sliding plate is characterized in that lifting handles are further arranged on two sides of the rear end of the sliding plate, a linkage device is arranged between the lifting handles and the plug pins, and the linkage device is assembled to be capable of drawing the plug pins out of the baffle plate area when the lifting handles are held by hands.

The linkage device comprises a third connecting rod and a third lever, one end of the third connecting rod is hinged with the bolt, the other end of the third connecting rod is hinged with one end of the third lever, the third lever is hinged with the lifting handle, the third lever is L-shaped, and the other end of the third lever forms a pressing handle; the bolt slides and sets up on the slide, the top of bolt is equipped with trapezoidal inserted block, be equipped with the pressure spring between trapezoidal inserted block and the slide.

The invention has the technical effects that: the invention realizes the transfer of the reflection unit between the vehicle body and the ground by using the ramp, has light operation and simple operation process, does not need too much manpower, can realize all operation processes by a single person, and greatly improves the detection efficiency of the atmospheric flow detection in the park.

Drawings

FIG. 1 is a perspective view of an FTIR open optical path detection vehicle provided by an embodiment of the present invention;

FIG. 2 is a perspective view of a first state of a release mechanism provided by an embodiment of the present invention;

FIG. 3 is a perspective view of a second state of the release mechanism provided by the embodiment of the present invention;

fig. 4 is a perspective view of a reflection unit provided by an embodiment of the present invention;

FIG. 5 is a top view of a skateboard provided by an embodiment of the present invention;

3 FIG. 36 3 is 3 a 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 3 5 3; 3

FIG. 7 is a cross-sectional view B-B of FIG. 5;

fig. 8 is a schematic view of an assembly structure of an FTIR infrared signal transceiving unit provided by an embodiment of the present invention;

FIG. 9 is a perspective view of a traction mechanism provided by an embodiment of the present invention;

FIG. 10 is a perspective view of a linkage provided by an embodiment of the present invention.

Detailed Description

The invention will be further explained with reference to fig. 1 to 10:

in order that the objects and advantages of the invention will be more clearly understood, the invention will now be described in detail with reference to the following examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed. It should be noted that, in the description of the present invention, the expressions of "front", "back", "left", "right", etc. representing directions are based on the general knowledge of those skilled in the art about the vehicle direction relationship, that is, the direction of the vehicle head is the front, the direction of the vehicle tail is the back, and the two sides of the vehicle are the left side and the right side, respectively.

As shown in fig. 1, an FTIR open optical path detection vehicle includes a box-type vehicle body 20, and an FTIR infrared signal transceiving unit 30, a reflection unit 40, an industrial personal computer and a control panel center which are installed in the box-type vehicle body 20; the FTIR infrared signal transceiving unit 30 is configured to transmit and receive infrared signals; the reflection unit 40 is configured to be capable of being separated from the vehicle body 20 and moving to the far end of the vehicle body 20, and is used for reflecting the infrared signal emitted by the FTIR infrared signal transceiving unit 30 and returning the infrared signal in the original path; the industrial personal computer and the control panel center are used for controlling the normal operation of the FTIR infrared signal transceiving unit 30 and analyzing and displaying the detection result of the FTIR infrared signal transceiving unit 30. The FTIR open optical path detection system is integrated in the van vehicle, so that the flow detection of the FTIR open optical path detection system is realized, and simultaneously, the hardware structures of the FTIR open optical path detection system are optimized, so that the FTIR open optical path detection system can be fully suitable for the spatial layout of the van vehicle.

Further, a tail door is arranged at the tail part of the vehicle body 20, and a release device is arranged at the tail part of a bottom plate of the vehicle body 20; the release means is provided to be able to lift the reflecting unit 40 from the inside of the vehicle body 20 to the floor 10 and to lift the reflecting unit 40 from the floor 10 to the inside of the vehicle body 20. Preferably, as shown in fig. 2 and 3, the releasing device includes a sliding plate 50, the sliding plate 50 is slidably disposed along the length direction of the vehicle body 20, and when the front end of the sliding plate 50 slides to the rear of the vehicle body 20, the sliding plate 50 can swing the rear end of the sliding plate 50 downward with the front end as a rotating shaft so as to form a ramp for the reflection unit 40 to move up and down between the vehicle body 20 and the ground 10. As shown in fig. 4, the reflection unit 40 is mounted on a lifting cart 41, a traction device for drawing the lifting cart 41 is provided at the front end of the sliding plate 50, and a locking device for fixing the lifting cart 41 is provided on the sliding plate 50. The ramp is not only a guiding device in the transferring process of the reflecting unit 40, but also a fixing device of the reflecting unit 40 in the driving process, so that the stable transportation of the reflecting unit 40 is ensured, meanwhile, redundant fastening devices in the vehicle are omitted, and the space utilization rate is improved.

Preferably, as shown in fig. 5 and 6, a traction groove 52 is formed in the center of the sliding plate 50, the traction device includes a chain 575 disposed in the traction groove 52, the chain 575 is connected end to end, two ends of the traction groove 52 are respectively provided with a sprocket, the chain 575 is tensioned between the two sprockets, wherein the sprocket at the front end of the sliding plate 50 is connected with the traction motor 56 through a speed reduction mechanism; a sliding block 573 is fixed on the chain 575, the sliding block 573 is slidably arranged in the traction groove 52, a towing hook 57 is arranged on the sliding block 573, and a hook ring matched with the towing hook 57 is arranged on the lifting cart 41. The invention adopts the traction device to complete the release and recovery of the reflection unit 40, thereby liberating the manpower and improving the working efficiency.

Preferably, as shown in fig. 9, the towing hook 57 includes a hook plate 574 and a swing rod 571, one section of the swing rod 571 is hinged to the slider 573, the other end of the swing rod 571 is fixed to the hook plate 574, a guide pin 572 perpendicular to the swing rod 571 is disposed on a shaft of the swing rod 571, the guide pin 572 is cantilevered to two sides of the traction slot 52, guide bars 521 are disposed on two sides of a notch of the traction slot 52, the guide bars 521 are protruded from a board surface of the sliding board 50, and a ramp 522 which is in inclined transition to the board surface of the sliding board 50 is disposed at a rear end of the guide bars 521; the guide pin 572 overlaps the guide bar 521, and when the slider 573 slides to the rear end of the slide plate 50, the guide pin 572 can slide down the ramp 522 onto the slide plate 50, so that the swing link 571 of the towing hook 57 swings downward, and the hook plate 574 automatically disengages from the hook ring on the lifting cart 41. According to the invention, the towing hook 57 is matched with the guide bar 521, so that the reflection unit 40 is automatically separated from the towing hook 57, the operation procedures are reduced, and the working efficiency is further improved.

Preferably, as shown in fig. 6, the locking device includes a locking pin 53 extending and contracting in a direction perpendicular to the surface of the sliding plate 50, and pin holes 411 matched with the locking pin 53 are provided on both sides of the lifting cart 41. A link mechanism is provided between the locking pin 53 and the slide plate 50, and is assembled such that the link mechanism can drive the locking pin 53 to be drawn out of the pin hole 411 when the rear end of the slide plate 50 is in contact with the floor 10, and can drive the locking pin 53 to be inserted into the pin hole 411 when the rear end of the slide plate 50 is separated from the floor 10. As shown in fig. 10, the linkage mechanism includes a first link 531, a second link 533, a first lever 532, a second lever 534; one end of the first link 531 is hinged to the locking pin 53, the other end of the first link 531 is hinged to one end of the first lever 532, the middle of the first lever 532 is hinged to a first hinge support arranged in the slide plate 50, the other end of the first lever 532 is hinged to one end of the second link 533, the other end of the second link 533 is hinged to one end of the second lever 534, the middle of the second lever 534 is hinged to a second hinge support arranged in the slide plate 50, the other end of the second lever 534 is provided with a trigger rod 55, the bottom of the rear end of the slide plate 50 is provided with a chamfer, when the rear end of the slide plate 50 is overlapped with the ground 10, the slope of the chamfer is flush with the ground 10, the trigger rod 55 protrudes out of the slope of the chamfer, the rotating shaft of the second lever 534 is provided with a torsion spring, the trigger rod 55 is flush with the surface of the slide plate 50 in a normal state, when the slope of the chamfer is adhered with the ground 10, the trigger, thereby driving the second lever 534, the second link 533, the first lever 532 and the first link 531 to move, and the first link 531 pulls the locking pin 53 downwards. In the invention, when an operator pulls out the sliding plate 50 and places the sliding plate on the ground 10, the locking device can be automatically unlocked under the action of the linkage mechanism, so that the operation procedures are further reduced, and the working efficiency is improved.

Preferably, as shown in fig. 3, the rear portion of the bottom plate of the vehicle body 20 is provided with a slideway 51 matched with two sides of the sliding plate 50, the slideway 51 is formed by two channel steel with opposite notches, and two sides of the sliding plate 50 are provided with

rollers

501, 502 and 503 matched with the groove walls of the slideway 51; the

rollers

501, 502 and 503 are provided with three pairs, wherein two pairs of

rollers

501 and 502 are respectively arranged at the front end and the rear end of the sliding plate 50, the other pair of rollers 503 is arranged between the front and rear pairs of

rollers

501 and 502 and is close to the pair of rollers 501 at the front end of the sliding plate 50, and the pair of rollers 503 is a middle roller 503; the wheel shaft of the middle roller 503 protrudes to the outside of the roller 503 for a certain distance, the inner side wall of the slideway 51 is provided with a limit block 512, and the limit block 512 is arranged to avoid the roller 502 at the rear end of the slideway 51 and can block the wheel shaft protruding part 504 of the middle roller 503; the tail end of the top wall of the slideway 51 is also provided with a notch 511, and when the axle of the middle roller 503 is blocked by the limiting block 512, the roller 501 at the front end of the sliding plate 50 just faces the notch 511. The front end roller 501 and the middle roller 503 can ensure that the sliding plate 50 is always limited in a horizontal posture until the sliding plate 50 reaches a turnover station in the process of drawing the sliding plate 50, so that an operator can save more labor in the drawing process.

Further, as shown in fig. 2, a locking mechanism is further disposed between the slide plate 50 and the slide rail 51, and the locking mechanism includes a latch 543 telescopically disposed along the width direction of the slide rail 51 along two sides of the rear end of the slide rail 51, and a baffle 546 disposed on the top wall of the slide rail 51 and engaged with the latch 543. A carrying handle 54 is also provided on each side of the rear end of the slide 50, and a linkage is provided between the carrying handle 54 and the pin 543 and is configured to facilitate withdrawal of the pin 543 from the region of the flap 546 when the carrying handle 54 is held by a person. The linkage device comprises a third connecting rod 542 and a third lever 541, one end of the third connecting rod 542 is hinged with the bolt 543, the other end of the third connecting rod is hinged with one end of the third lever 541, the third lever 541 is hinged with the lifting handle 54, the third lever 541 is L-shaped, and the other end of the third lever 541 forms a pressing handle; the bolt 543 is slidably disposed on the sliding seat, a trapezoidal insertion block 545 is disposed at the top end of the bolt 543, and a pressure spring 544 is disposed between the trapezoidal insertion block 545 and the sliding seat. The locking mechanism can ensure that the sliding plate 50 cannot move back and forth in the running process of the vehicle, and the stability of equipment in the running process of the vehicle is improved. The linkage device enables an operator to unlock the locking mechanism while holding the lifting handle 54, so that additional operation is further reduced, the working efficiency is improved, and the user experience is optimized.

Preferably, a skylight is arranged on the top of the vehicle body 20, an arched bracket 33 is arranged in the vehicle body 20 at a position corresponding to the skylight, as shown in fig. 8, the FTIR infrared signal transceiver unit 30 is rotatably arranged on the top of the arched bracket 33 along a horizontal axis, the FTIR infrared signal transceiver unit 30 can be turned over to the top of the vehicle through the skylight when the skylight is opened, and the FTIR infrared signal transceiver unit 30 is mounted on the tilting turntable 31; the pitching rotary table 31 is arranged on the left and right sweeping rotary table 32; the left and right scanning and swinging table 32 is rotatably arranged at the top end of the arched bracket 33 along the horizontal axis, so that the FTIR infrared signal receiving and transmitting unit 30 can perform 360-degree omnibearing detection without dead angles.

Furthermore, the landing legs on two sides of the arched support 33 are fixedly connected with the bottom plate of the vehicle body 20, the landing legs are provided with jacking piston cylinders 34, the jacking piston cylinders 34 are vertically arranged, and piston rods of the jacking piston cylinders 34 downwards penetrate through the bottom plate of the vehicle body 20. When the piston rod is ejected and abuts against the ground 10, the vehicle body 20 can be kept stable, the occurrence of shaking due to the presence of the vehicle suspension can be avoided, and the detection accuracy can be ensured. Preferably, a weather instrument 22, a monitor 23 and an illumination device 21 are further disposed on the top of the vehicle body 20, the weather instrument 22 is used for detecting weather conditions around the vehicle in real time and providing reference data for atmospheric detection, the monitor 23 is used for detecting the surrounding environment of the vehicle, and the illumination device 21 provides auxiliary illumination for night work.

The specific operation flow of the atmosphere detection vehicle in use comprises the following steps:

firstly, the vehicle is driven to an area where the reflection unit 40 needs to be placed, the tail door is opened, the lifting handle 54 is held by two hands, the sliding plate 50 is pulled outwards, the rear end of the sliding plate 50 is slightly placed on the ground after the sliding plate 50 is pulled to the extreme position, the locking device is automatically unlocked at the moment, the operator starts the traction device to enable the towing hook 57 to gradually descend downwards, when the towing hook 57 descends to the lowest end of the sliding plate 50, the lifting trailer 41 completely falls to the ground at the moment, the acting force between the towing hook 57 and the shackle disappears, the towing hook 57 automatically swings downwards due to gravity and is separated from the shackle, the reflection unit 40 is completely released, the operator lifts the sliding plate 50 upwards by two hands to the horizontal position, then pushes the sliding plate 50 inwards to reset the sliding plate 50, then the tail door is closed, and the vehicle runs to an; opening a skylight, starting a turnover mechanism, turning over the FTIR infrared signal transceiving unit 20 to the top of the vehicle, and simultaneously starting a jacking piston cylinder 34 to enable the top end of the piston rod to be tightly abutted against the ground; at this time, the subsequent operations such as light and detection can be performed.

Claims

1. A reflective unit release device of an FTIR open optical path detection vehicle is characterized in that: the reflecting unit comprises a sliding plate (50), wherein the sliding plate (50) is arranged in a sliding mode along the length direction of a vehicle body (20), when the front end of the sliding plate (50) slides to the tail of the vehicle body (20), the sliding plate (50) can enable the rear end of the sliding plate (50) to swing downwards by taking the front end as a rotating shaft, and therefore a ramp (522) for the reflecting unit (40) to move up and down is formed between the vehicle body (20) and the ground (10); the reflection unit (40) is installed on a lifting trolley (41), the front end of the sliding plate (50) is provided with a traction device for traction of the lifting trolley (41), and the sliding plate (50) is provided with a locking device for fixing the lifting trolley (41); a traction groove (52) is formed in the center of the sliding plate (50), the traction device comprises a chain (575) arranged in the traction groove (52), the chain (575) is connected end to end, two ends of the traction groove (52) are respectively provided with a chain wheel, the chain (575) is tensioned between the two chain wheels, and the chain wheel positioned at the front end of the sliding plate (50) is connected with a traction motor (56) through a speed reducing mechanism; a sliding block (573) is fixed on the chain (575), the sliding block (573) is arranged in the traction groove (52) in a sliding manner, a towing hook (57) is arranged on the sliding block (573), and a hook ring matched with the towing hook (57) is arranged on the lifting cart (41);

the towing hook (57) comprises a hook plate (574) and a swinging rod (571), one end of the swinging rod (571) is hinged to the sliding block (573), the other end of the swinging rod (571) is fixed to the hook plate (574), a guide pin (572) perpendicular to the swinging rod (571) is arranged on a rod body of the swinging rod (571), the guide pin (572) is arranged in a hanging mode towards two sides of the traction groove (52), guide strips (521) are arranged on two sides of a notch of the traction groove (52), the guide strips (521) protrude out of the plate surface of the sliding plate (50), and a ramp (522) in inclined transition towards the plate surface of the sliding plate (50) is arranged at the rear end of each guide strip (521); the guide pin (572) is lapped on the guide strip (521), when the sliding block (573) slides to the rear end of the sliding plate (50), the guide pin (572) can slide onto the sliding plate (50) along the ramp (522), so that the swinging rod (571) of the towing hook (57) swings downwards, and the hook plate (574) is automatically separated from the shackle on the lifting trolley (41).

2. The reflective unit release apparatus of an FTIR open optical path detection vehicle according to claim 1, wherein: the locking device comprises a locking pin (53) which is arranged in a telescopic manner along the direction vertical to the surface of the sliding plate (50), and pin holes (411) matched with the locking pin (53) are formed in two sides of the lifting trolley (41); a linkage mechanism is arranged between the locking pin (53) and the sliding plate (50), and is assembled to drive the locking pin (53) to be drawn out of the pin hole (411) when the rear end of the sliding plate (50) is in contact with the ground (10), and drive the locking pin (53) to be inserted into the pin hole (411) when the rear end of the sliding plate (50) is separated from the ground (10).

3. The reflective unit release apparatus of an FTIR open optical path detection vehicle according to claim 2, wherein: the linkage mechanism comprises a first connecting rod (531), a second connecting rod (533), a first lever (532) and a second lever (534); one end of the first connecting rod (531) is hinged with the locking pin (53), the other end of the first connecting rod is hinged with one end of the first lever (532), the middle part of the first lever (532) is hinged with a first hinge support arranged in the sliding plate (50), the other end of the first lever (532) is hinged with one end of the second connecting rod (533), the other end of the second connecting rod (533) is hinged with one end of the second lever (534), the middle part of the second lever (534) is hinged with a second hinge support arranged in the sliding plate (50), the other end of the second lever (534) is provided with a trigger rod (55), the bottom of the rear end of the sliding plate (50) is provided with a chamfer, when the rear end of the sliding plate (50) is overlapped with the ground (10), the slope of the chamfer is flush with the ground (10), the trigger rod (55) protrudes out of the slope of the chamfer, a torsion spring is arranged on the rotating shaft of the second lever (534), and the trigger rod (55) is flush with the plate surface of the sliding plate (50) in, when the slope surface of the chamfer is attached to the ground (10), the trigger rod (55) is extruded by the ground (10) and can swing upwards, so that the second lever (534), the second connecting rod (533), the first lever (532) and the first connecting rod (531) are driven to act, and the first connecting rod (531) pulls the locking pin (53) downwards.

4. The reflective unit release apparatus of an FTIR open optical path detection vehicle according to claim 1, wherein: the tail part of the bottom plate of the vehicle body (20) is provided with a slideway (51) matched with two sides of the sliding plate (50), the slideway (51) is composed of two channel steel with opposite notches, and two sides of the sliding plate (50) are provided with rollers (501, 502 and 503) matched with the groove walls of the slideway (51); the rollers (501, 502 and 503) are provided with three pairs, wherein two pairs of rollers (501 and 502) are respectively arranged at the front end and the rear end of the sliding plate (50), the other pair of rollers (503) is arranged between the front pair of rollers (501 and 502) and close to the pair of rollers (501) at the front end of the sliding plate (50), and the pair of rollers (503) is a middle roller (503); the wheel shaft of the middle roller (503) protrudes and extends to the outer side of the roller (503) for a certain distance, the inner side wall of the slideway (51) is provided with a limit block (512), and the limit block (512) is arranged to avoid the roller (502) at the rear end of the slideway (51) and can block the protruding part (504) of the wheel shaft of the middle roller (503); the tail end of the top wall of the slide way (51) is also provided with a notch part (511), and when the wheel axle of the middle roller (503) is blocked by the limiting block (512), the roller (501) at the front end of the sliding plate (50) is just opposite to the notch part (511).

5. The reflective unit release apparatus of an FTIR open optical path detection vehicle according to claim 4, wherein: still be equipped with locking mechanical system between slide (50) and slide (51), locking mechanical system includes along slide (51) rear end both sides along slide (51) width direction flexible bolt (543) that set up to and slide (51) roof on set up with bolt (543) complex baffle (546).

6. The reflective unit release apparatus of an FTIR open optical path detection vehicle according to claim 5, wherein: and the two sides of the rear end of the sliding plate (50) are also provided with a lifting handle (54), a linkage device is arranged between the lifting handle (54) and the plug pin (543), and the linkage device is assembled to be capable of drawing the plug pin (543) out of the area of the baffle plate (546) when the lifting handle (54) is held by hands.

7. The reflective unit release apparatus of an FTIR open optical path detection vehicle as claimed in claim 6, wherein: the linkage device comprises a third connecting rod (542) and a third lever (541), one end of the third connecting rod (542) is hinged with the bolt (543), the other end of the third connecting rod is hinged with one end of the third lever (541), the third lever (541) is hinged with the lifting handle (54), the third lever (541) is L-shaped, and the other end of the third lever (541) forms a pressing handle; bolt (543) slide to set up on the slide, the top of bolt (543) is equipped with trapezoidal inserted block (545), be equipped with pressure spring (544) between trapezoidal inserted block (545) and the slide.