A device for measuring the temperature of road paving on the Internet

Abstract

The present invention discloses an online measuring device for pavement paving temperature, comprising: a fixed frame, mounted on a paver; a movable frame, mounted on the fixed frame and capable of moving up and down; a plurality of measuring mechanisms, mounted on the movable end of the movable frame, so as to be pulled by the fixed frame and the movable frame to move with the paver; a main machine, mounted on the fixed frame, for analyzing the measuring signal of the measuring mechanism and obtaining the corresponding temperature; wherein the measuring mechanism comprises a measuring wheel rim and a measuring wheel frame, and a vacuum chamber is arranged in the measuring wheel rim. The present invention arranges a heat conducting plate on the measuring wheel rim in rolling contact with the pavement to quickly transfer the pavement temperature to the heat conducting plate, and measures the thermal radiation generated by the heat conducting plate through a detector, a modulation disk, a right-angle reflector and a horizontal reflector, so as to calculate the temperature of the paved pavement, and has a stronger anti-interference ability and a higher measurement accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of infrastructure detection, and in particular to an online measuring device for road paving temperature. Background Art

[0002] During the asphalt pavement paving process, the pavement temperature needs to be kept within a certain range. Too high or too low a temperature will cause the pavement to crack after compaction. Therefore, during the paving process, the pavement temperature needs to be monitored in real time to avoid excessively high or low temperatures.

[0003] Existing temperature monitoring usually adopts optical measurement, that is, measurement is performed through infrared temperature sensors or thermal imagers. However, there are the following problems in the measurement process of infrared temperature sensors or thermal imagers:

[0004] 1) The measuring distance is too high, and the road surface temperature is easily affected by external environment such as air temperature, resulting in low measurement accuracy and large error;

[0005] 2) The measurement distance is too close, and its measurement accuracy is improved, but because the ambient temperature is affected by the road temperature, it works in a higher temperature environment, which is prone to heat or damage, resulting in measurement errors;

[0006] 3) The non-contact measurement of infrared temperature sensors or thermal imagers needs to be installed on the paver or set on the rack of the paver. It is fixed to the paver and there is jitter during the mobile paving process, which causes the measurement distance to change continuously and affects the accuracy of the measurement.

[0007] In summary, fixed non-contact temperature measurement methods such as infrared temperature sensors or thermal imagers are subject to many interference factors and cannot accurately and reliably monitor the online temperature of the paved road surface. Summary of the invention

[0008] The purpose of the present invention is to provide an online measurement device for pavement paving temperature, so as to solve the technical problem in the prior art that non-contact measurement is easily disturbed and cannot accurately and reliably perform online temperature monitoring of the paved pavement.

[0009] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0010] A device for measuring the temperature of a road surface paving on-line, comprising:

[0011] A fixed frame, mounted on the paver;

[0012] A movable frame is installed on the fixed frame and can move up and down;

[0013] A plurality of measuring mechanisms are installed at the movable end of the movable frame so as to be pulled by the fixed frame and the movable frame to move along with the paver;

[0014] A host computer, mounted on the fixing frame, analyzes the measurement signal of the measuring mechanism and obtains the corresponding temperature;

[0015] The measuring mechanism comprises a measuring wheel rim and a measuring wheel frame, a vacuum chamber is arranged in the measuring wheel rim, and a plurality of heat conducting plates extending into the vacuum chamber are embedded on the outer side wall of the measuring wheel rim;

[0016] During the movement, when the measuring wheel frame rotates on the movable frame due to the friction of the road surface, the plurality of heat conducting plates sequentially and cyclically contact the paving road surface, so as to transfer the heat of the paving road surface to the vacuum chamber in a multi-point measurement manner with a fixed interval;

[0017] A plurality of right-angle reflective cylinders are arranged on the inner wall of the measuring wheel rim, one end of each of the right-angle reflective cylinders extends into the vacuum chamber and is sleeved on the heat conducting plate to horizontally refract the heat radiation electromagnetic waves of the heat conducting plate;

[0018] The other end of the right-angle reflection cylinder extends to between the measuring wheel rim and the measuring wheel frame and is provided with a horizontal focusing cylinder, at the end of which a modulation disk and a detector are sequentially provided, and the detector is electrically connected to the host to modulate the horizontally refracted thermal radiation electromagnetic wave through the modulation disk and convert it into an electrical signal through the detector and transmit it to the host, so as to realize contact-type online measurement of the temperature of the paved road surface.

[0019] As a preferred solution of the present invention, a white body corner plate is provided at the corner inside the right angle reflection tube, and a black body coating is applied on the inner wall of the right angle reflection tube and the horizontal focusing tube;

[0020] The heat radiation electromagnetic wave emitted by the heat conducting plate enters the right-angle reflector tube, a part of which is reflected by the white body corner plate into the horizontal focusing tube, and the other part is absorbed by the black body coating.

[0021] As a preferred solution of the present invention, a plurality of focusing lenses are arranged in the horizontal focusing tube, and the focusing lenses at the rear positions are all located at the focal point of the focusing lenses at the front positions;

[0022] The thermal radiation electromagnetic waves reflected by the white body corner plate pass through a plurality of focusing lenses and are focused on the detector.

[0023] As a preferred solution of the present invention, the receiving end of the detector is located at the focus of the post-positioned focusing lens, and the modulation disk is located between the post-positioned focusing lens and the detector;

[0024] The modulation disk adjusts the thermal radiation electromagnetic wave of the post-positioned focusing lens into a variable electromagnetic wave signal.

[0025] As a preferred solution of the present invention, the measuring wheel rim and the measuring wheel frame are both made of heat-insulating materials, and the right-angle reflection cylinder and the horizontal focusing cylinder are both made of heat-insulating materials, and a plurality of heat-insulating plates are arranged in the vacuum chamber;

[0026] Wherein, the heat insulation plate is sequentially arranged between two adjacent heat conducting plates.

[0027] As a preferred solution of the present invention, the heat conducting plate comprises an arc-shaped heat plate arranged on the outer wall of the measuring wheel rim and a heat transfer plate arranged in the vacuum chamber;

[0028] Wherein, a plurality of slots are arranged on the inner arc surface of the arc-shaped heat plate, a plurality of inserting plates are arranged on the centrifugal side of the heat transfer plate, and the plurality of inserting plates are inserted in the plurality of slots.

[0029] As a preferred solution of the present invention, a cavity is provided in the heat transfer plate, and a capillary wick is provided in the cavity;

[0030] Wherein, the cavity is a vacuum cavity, and a heat transfer medium is arranged in the cavity.

[0031] As a preferred solution of the present invention, a plurality of right-angle reflective cylinders are arranged staggered toward both sides at one end between the measuring wheel ring and the measuring wheel frame;

[0032] The width of the measuring wheel frame is smaller than the width of the measuring wheel rim, and the measuring wheel frame is centrally fixed on the inner ring wall of the measuring wheel rim;

[0033] Wherein, the plurality of modulation disks and the plurality of detectors are staggeredly arranged on both sides of the measuring wheel frame and located in the inner ring of the measuring wheel ring.

[0034] As a preferred solution of the present invention, heat insulation covers are provided on both sides of the measuring wheel rim;

[0035] The portion of the right-angle reflection tube outside the measuring wheel rim, the horizontal focusing tube, the modulation disk and the detector are all located in a cavity formed by the heat insulation cover, the measuring wheel rim and the measuring wheel frame.

[0036] As a preferred solution of the present invention, a cooling mechanism is provided on the fixing frame, and the cooling mechanism includes a cold water tank and a circulating pump connected to each other through a pipeline;

[0037] A cooling pipeline and a return pipeline are respectively provided on the two heat-insulating covers on each of the measuring wheel rims, and the heat-insulating covers are sealingly and rotatably connected to the measuring wheel rims;

[0038] Among them, a plurality of the cooling pipelines are connected in parallel to the circulation pump, and a plurality of the return pipelines are connected in parallel to the cold water tank.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention arranges a heat transfer plate on the measuring wheel rim in rolling contact with the road surface to quickly transfer the road surface temperature to the heat transfer plate, and measures the thermal radiation generated by the heat transfer plate through a detector, a modulation disk, a right-angle reflection cylinder and a horizontal reflection cylinder, so as to calculate the temperature of the paved road surface. The present invention has stronger anti-interference ability and higher measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0042] Figure 1 A schematic diagram of the structure of an online measuring device for pavement paving temperature provided by an embodiment of the present invention;

[0043] Figure 2 A schematic diagram of the structure of a measuring mechanism of an online measuring device for pavement paving temperature provided by an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of the structure of a measuring wheel rim portion of an online measuring device for pavement paving temperature provided by an embodiment of the present invention;

[0045] Figure 4 A schematic diagram of the structure of a heat conducting plate portion of a device for online measuring pavement paving temperature provided by an embodiment of the present invention;

[0046] Figure 5 A schematic diagram of the structure of the right-angle reflection tube portion of the online measurement device for pavement paving temperature provided in an embodiment of the present invention.

[0047] The numbers in the figure represent the following:

[0048] 1-fixed frame; 2-movable frame; 3-measuring mechanism; 4-host; 5-cooling mechanism;

[0049] 31- measuring wheel rim; 32- measuring wheel frame; 33- vacuum chamber; 34- heat conducting plate; 35- right angle reflection tube; 36- horizontal focusing tube; 37- modulation disk; 38- detector; 51- cold water tank; 52- circulation pump; 53- cooling pipeline; 54- reflux pipeline;

[0050] 311-insulation cover; 331-insulation board; 341-arc heat plate; 342-heat transfer plate; 343-slot; 344-insert board; 345-cavity; 346-capillary wick; 351-white body corner plate; 352-black body coating; 361-focusing lens. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides an online measurement device for pavement paving temperature, comprising:

[0053] A fixed frame 1, mounted on the paver;

[0054] The movable frame 2 is installed on the fixed frame 1 and can move up and down;

[0055] A plurality of measuring mechanisms 3 are installed at the movable end of the movable frame 2 so as to be pulled by the fixed frame 1 and the movable frame 2 to move along with the paver;

[0056] The host 4 is mounted on the fixing frame 1, and analyzes the measurement signal of the measuring mechanism 3 and obtains the corresponding temperature;

[0057] The measuring mechanism 3 includes a measuring wheel 31 and a measuring wheel frame 32. A vacuum chamber 33 is provided in the measuring wheel 31. A plurality of heat conducting plates 34 extending into the vacuum chamber 33 are embedded on the outer wall of the measuring wheel 31 to transfer the heat of the paved road surface to the vacuum chamber 33 in a multi-point measurement manner with a fixed interval.

[0058] A plurality of right-angle reflective cylinders 35 are arranged on the inner wall of the measuring wheel rim 31, and one end of each right-angle reflective cylinder 35 extends into the vacuum chamber 33 and is sleeved on the heat conducting plate 34 to horizontally refract the heat radiation electromagnetic waves of the heat conducting plate 34;

[0059] The other end of the right-angle reflection cylinder 35 extends to between the measuring wheel rim 31 and the measuring wheel frame 32 and is provided with a horizontal focusing cylinder 36. A modulation disk 37 and a detector 38 are sequentially provided at the end of the horizontal focusing cylinder 36. The detector 38 is electrically connected to the main unit 4 to modulate the horizontally refracted thermal radiation electromagnetic wave through the modulation disk 37 and convert it into an electrical signal through the detector 38 and transmit it to the main unit 4, so as to realize contact-type online measurement of the temperature of the paved road surface.

[0060] The online temperature measurement device of this embodiment mainly utilizes a fixed frame 1 and a movable frame 2 to enable multiple measuring mechanisms 3 to move synchronously with the paver on the paved road surface, and during the movement, the measuring wheel rim 31 is subjected to the friction of the road surface to cause the measuring wheel frame 32 to rotate on the movable frame 2, so that multiple heat conducting plates 34 are cyclically contacted with the paved road surface in turn, so that they are quickly heated to a similar temperature by the high temperature of the road surface, and the heat conducting plates 34 radiate electromagnetic waves to the right-angle reflection cylinder 35 by radiation. After being reflected, they are focused along the horizontal focusing cylinder 36, and then modulated by the modulation disk 37 to form an alternating signal and input into the detector 38 to obtain the road surface temperature of this area.

[0061] Since the plurality of heat-conducting plates 34 contact the paving road surface in a cyclic manner during the rolling of the measuring wheel rim 31, the plurality of heat-conducting plates 34 can transmit the real-time temperature of the paving road surface at multiple points at fixed intervals along the paving route, so that the detector 38 can monitor the temperature of the paving road surface at multiple points at fixed intervals, thereby realizing online temperature monitoring of the paving road surface.

[0062] Among them, the host 4 is used to receive the temperature calculated by the detector 38 and transmit data by wired or wireless means. The power supply of the detector 38 and the modulation disk 37 is supplied by the host 4 by wire, that is, a contact power supply component (such as a brush, etc.) is set between the measuring wheel rim 31 and the host 4.

[0063] Among them, the fixed frame 1 is fixed on the paver and moves synchronously and slowly therewith, and the movable frame 2 enables multiple measuring wheel rims 31 fixed thereon to move with the fixed frame 2, so that when paving, the multiple measuring wheel rims 31 are pressed down by gravity, so that the measuring wheel rims 31 rotate (roll) due to the friction of the paving road surface during the movement.

[0064] Since the paving speed of the paver is slow, the rolling speed of the measuring wheel 31 is slow, so the heat conducting plate 34 is in contact with the road surface for a longer time, which can make the temperature of the heat conducting plate 34 rise quickly to a temperature close to the paving road surface.

[0065] Among them, the right-angle reflection tube 35 uses the reflective principle of thermal radiation electromagnetic waves and its right-angle structure to make the thermal radiation electromagnetic waves almost totally reflected into the horizontal focusing tube 36. The horizontal focusing tube 36 focuses the thermal radiation electromagnetic waves through the gathering of optical lenses and is adjusted by the modulation disk 37 to become alternating electromagnetic waves. The detector 38 can calculate the temperature of the heat conduction plate 34 (radiation source) according to the alternating electromagnetic waves, thereby obtaining the temperature of the paved road surface.

[0066] Thermal radiation electromagnetic waves have similar characteristics to light waves, and have the basic characteristics of refraction and reflection. In order to reduce the external heat dissipation of the heat conducting plate 34, the other end of the heat conducting plate 34 is placed in the vacuum chamber 33, and the heat transfer of the vacuum chamber 33 can only transfer heat by radiation.

[0067] In order to enable the thermal radiation electromagnetic waves of the heat conducting plate 34 to be conducted along the right-angle reflection tube 35 and the horizontal focusing plate 36 to the modulation disk 37 and the detector 38, the following preferred method is provided.

[0068] like Figure 2 , Figure 3 and Figure 5 As shown, a white body corner plate 351 is provided at the corner inside the right angle reflection tube 35, and a black body coating 352 is coated on the inner wall of the right angle reflection tube 35 and the horizontal focusing tube 36;

[0069] The heat radiation electromagnetic wave emitted by the heat conducting plate 34 enters the right-angle reflector tube 35 , a part of which is reflected by the white body corner plate 351 into the horizontal focusing tube 36 , and the other part is absorbed by the black body coating 352 .

[0070] The white body corner plate 351 is disposed at the inner corner of the right-angle reflector 35, and the white body corner plate 351 is made of a material close to a white body (an idealized object with a reflectivity equal to 1), such as a copper foil with a polished surface, so as to reflect the thermal radiation electromagnetic wave;

[0071] The black body coating 352 is disposed on the inner walls of the right-angle reflection tube 35 and the horizontal focusing tube 36 , and the black body coating 353 is a material close to a black body (an idealized object with an absorption rate equal to 1), such as a full black coating, etc., to absorb the thermal radiation electromagnetic waves.

[0072] The black body coating 352 can absorb the thermal radiation noise of the heat conducting plate 34 before and after reflection, so that most of the thermal radiation electromagnetic waves are always parallel to the right-angle reflection tube 35, and most of the thermal radiation electromagnetic waves can be horizontally transmitted to the horizontal focusing tube 36, and the scattered thermal radiation electromagnetic waves that cannot be gathered in the horizontal focusing tube 36 can be absorbed.

[0073] Furthermore, the black body coating 352 can reduce the interference caused by the heat radiation of the right-angle reflection tube 35 and the horizontal focusing tube 36 on the reflection and focusing of the heat radiation electromagnetic waves of the heat conducting plate 34 .

[0074] Thermal radiation electromagnetic waves need to be focused using lenses, but a single lens has aberrations when focusing, causing the electromagnetic waves received by the detector to be scattered, thereby affecting the accuracy of the measurement results. The following provides an optimal method to reduce the impact of aberrations.

[0075] like Figure 3 and Figure 5 As shown, a plurality of focusing lenses 361 are arranged in the horizontal focusing tube 36, and the focusing lenses 361 at the rear position are all located at the focal point of the focusing lenses 361 at the front position;

[0076] The thermal radiation electromagnetic waves reflected by the white body corner plate 351 pass through a plurality of focusing lenses 361 and are focused on the detector 38 .

[0077] Multiple focusing lenses 361 are composed of a combination of convex lenses, concave lenses, plane lenses, etc., and multiple focusing lenses 361 are installed in a focal plane assembly so that the thermal radiation electromagnetic waves can be relatively focused, and a large amount of non-focused thermal radiation electromagnetic waves are absorbed by the black body coating 351 to increase the accuracy of the measurement.

[0078] like Figure 3 and Figure 5 As shown, the receiving end of the detector 38 is located at the focus of the post-positioned focusing lens 361, and the modulation disk 37 is located between the post-positioned focusing lens 361 and the detector 38;

[0079] The modulation disk 37 adjusts the thermal radiation electromagnetic wave passing through the post-positioned focusing lens 361 into a variable electromagnetic wave signal.

[0080] The modulation disk 7 modulates the thermal radiation electromagnetic wave into an alternating electromagnetic wave signal. The detector 38 is arranged on the focal plane after focusing to receive the alternating electromagnetic wave signal and calculate the temperature based on the analysis of the alternating electromagnetic wave signal (thermal imager principle).

[0081] like Figure 1 and Figure 2 As shown, the measuring wheel rim 31 and the measuring wheel frame 32 are both made of heat-insulating materials, and the right-angle reflection tube 35 and the horizontal focusing tube 36 are both made of heat-insulating materials, and a plurality of heat-insulating plates 331 are arranged in the vacuum chamber 33;

[0082] The heat insulation plate 331 is sequentially arranged between two adjacent heat conducting plates 34 .

[0083] The radiation end of the heat conducting plate 34 is disposed in the vacuum chamber 33 , so that the heat conducting plate 34 transfers heat in the vacuum chamber 33 mainly by radiation.

[0084] The measuring wheel rim 31 and the measuring wheel frame 32 are made of heat-insulating materials, and the right-angle reflection tube 35 and the horizontal focusing tube 36 are both made of heat-insulating materials, which can reduce the heat loss of the heat conducting plate 34 .

[0085] The heat insulation plate 331 is disposed between the two heat conducting plates 34 to avoid mutual radiation interference between the heat conducting plates 34 , thereby increasing the accuracy of the measurement.

[0086] like Figure 2 , Figure 3 and Figure 4 As shown, the heat conducting plate 34 includes an arc-shaped heat plate 341 disposed on the outer wall of the measuring wheel rim 31 and a heat transfer plate 342 disposed in the vacuum chamber 33;

[0087] A plurality of slots 343 are provided on the inner arc surface of the arc-shaped heat plate 341 , a plurality of inserting plates 344 are provided on the centrifugal side of the heat transfer plate 342 , and the plurality of inserting plates 344 are inserted into the plurality of slots 343 .

[0088] The large-area arc-shaped heat plate 341 is arranged outside the measuring wheel rim 31 to prolong its contact time with the road surface when rolling, so that the temperature of the heat conducting plate 34 is closer to the road surface temperature, thereby improving the accuracy of the measurement.

[0089] The heat transfer plate 342 is connected to the arc-shaped heat plate 341 through the plug plate 344 and the slot 343, which increases the contact area and improves the heat transfer rate, thereby accelerating the temperature rise rate of the heat conduction plate 34 and making the accurate measurement faster.

[0090] like Figure 4 As shown, a cavity 345 is provided in the heat transfer plate 342, and a capillary wick 346 is provided in the cavity 345;

[0091] The cavity 345 is a vacuum cavity, and a heat transfer medium is arranged in the cavity 345 .

[0092] The arc-shaped heat plate 341 transfers heat to the bottom of the heat transfer plate 342, so that the heat transfer plate 342 heats the heat transfer medium in the cavity 345 to vaporize it. The vaporized medium contacts the top of the heat transfer plate 342, causing the top end of the heat transfer plate 342 to heat up rapidly.

[0093] The vaporized medium that contacts the upper end condenses and is absorbed by the capillary absorption core 346, and then flows to the bottom of the heat transfer plate 342, where it circulates through evaporation and condensation, causing the top of the heat transfer plate 342 to heat up quickly. This is faster than the solid heat conduction speed of the heat transfer plate 342, so the temperature of the heat transfer plate 342 can be measured more quickly, thereby quickly obtaining the temperature of the paved road surface.

[0094] like Figure 3 As shown, a plurality of right-angle reflective cylinders 35 are disposed alternately toward both sides at one end between the measuring wheel rim 31 and the measuring wheel frame 32;

[0095] The width of the measuring wheel frame 32 is smaller than the width of the measuring wheel rim 31, and the measuring wheel frame 32 is centrally fixed on the inner ring wall of the measuring wheel rim 31;

[0096] The plurality of modulation disks 37 and the plurality of detectors 38 are staggeredly arranged on both sides of the measuring wheel frame 32 and are located in the inner ring of the measuring wheel rim 31 .

[0097] The width of the measuring wheel rim 31 is greater than the width of the measuring wheel frame 32, so as to leave a portion from the measuring wheel frame 32 to the end of the measuring wheel rim 31 for accommodating a modulation disk 37 and a detector 38 with a larger installation volume.

[0098] The directions of two adjacent right-angle reflection cylinders 35 are opposite, so that the multiple modulation disks 37 and the multiple detectors 38 are installed on both sides of the measuring wheel frame 32, so as to be completely installed in a small space without affecting the measurement.

[0099] like Figure 3 As shown, heat-insulating covers 311 are provided on both sides of the measuring wheel rim 31;

[0100] The part of the right-angle reflection tube 35 outside the measuring wheel rim 31 , the horizontal focusing tube 36 , the modulation disk 37 and the detector 38 are all located in the cavity formed by the heat insulation cover 311 , the measuring wheel rim 31 and the measuring wheel frame 32 .

[0101] The heat-insulating cover 311 can seal the interior of the measuring wheel rim 31 to prevent stones, dust and other debris from entering during the paving process to damage the right-angle reflection cylinder 35, the horizontal focusing cylinder 36, the modulation disk 37 and the detector 38, and can block the high temperature environment in the paving area to avoid affecting the normal operation of the modulation disk 37 and the detector 38.

[0102] like Figure 1 and Figure 3 As shown, a cooling mechanism 5 is provided on the fixing frame 1, and the cooling mechanism 5 includes a cold water tank 51 and a circulating pump 52 which are interconnected by pipelines;

[0103] A cooling pipeline 53 and a return pipeline 54 are respectively provided on the two heat-insulating covers 311 on each measuring wheel rim 31, and the heat-insulating covers 311 are sealingly and rotatably connected to the measuring wheel rim 31;

[0104] Among them, a plurality of cooling pipelines 53 are connected in parallel to the circulation pump 52 , and a plurality of return pipelines 54 are connected in parallel to the cold water tank 51 .

[0105] The circulation pump 52 delivers cooling water into the measuring wheel rim 31 through the cooling pipeline 53 to reduce the operating temperature of the modulation disk 37 and the detector 38.

[0106] The heated water enters the cold water tank 51 through the return pipe 54 to be cooled, and circulates in this way to keep the modulation disk 37 and the detector 38 working at a suitable temperature.

[0107] The modulation disk 47 and the detector 38 are designed to be waterproof, and the joints thereof are sealed.

[0108] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A pavement paving temperature online measurement device, characterized in that: include: A fixed frame (1) is installed on the paver; A movable frame (2) is mounted on the fixed frame (1) and is capable of rotating around the fixed frame (1); A plurality of measuring mechanisms (3) are mounted on the movable end of the movable frame (2) so as to be pulled by the fixed frame (1) and the movable frame (2) to move along with the paver; A host (4) is mounted on the fixing frame (1) and analyzes the measurement signal of the measuring mechanism (3) to obtain the corresponding temperature; The measuring mechanism (3) comprises a measuring wheel rim (31) and a measuring wheel frame (32); a vacuum chamber (33) is arranged in the measuring wheel rim (31); and a plurality of heat conducting plates (34) extending into the vacuum chamber (33) are embedded on the outer side wall of the measuring wheel rim (31); During the movement, when the measuring wheel rim (31) is subjected to the friction of the road surface and causes the measuring wheel frame (32) to rotate on the movable frame (2), the plurality of heat conducting plates (34) sequentially and cyclically contact the paved road surface, so as to transfer the heat of the paved road surface to the vacuum chamber (33) in a manner of multi-point measurement at a fixed interval; A plurality of right-angle reflection cylinders (35) are arranged on the inner wall of the measuring wheel rim (31), one end of each right-angle reflection cylinder (35) extends into the vacuum chamber (33) and is sleeved on the heat conducting plate (34) to horizontally refract the heat radiation electromagnetic waves of the heat conducting plate (34); The other end of the right-angle reflection cylinder (35) extends to between the measuring wheel rim (31) and the measuring wheel frame (32) and is provided with a horizontal focusing cylinder (36). A modulation disk (37) and a detector (38) are sequentially provided at the end of the horizontal focusing cylinder (36). The detector (38) is electrically connected to the host (4) to modulate the horizontally refracted thermal radiation electromagnetic wave through the modulation disk (37) and convert it into an electrical signal through the detector (38) and transmit it to the host (4), so as to realize contact-type online measurement of the temperature of the paved road surface.

2. The on-line measuring device for pavement paving temperature according to claim 1, characterized in that: A white body corner plate (351) is provided at a corner inside the right-angle reflection tube (35), and a black body coating (352) is coated on the inner walls of the right-angle reflection tube (35) and the horizontal focusing tube (36); The heat radiation electromagnetic wave emitted by the heat conducting plate (34) enters the right-angle reflector tube (35), a part of which is reflected by the white body corner plate (351) into the horizontal focusing tube (36), and the other part is absorbed by the black body coating (352).

3. The on-line measuring device for pavement paving temperature according to claim 2, characterized in that: A plurality of focusing lenses (361) are arranged in the horizontal focusing cylinder (36), and the focusing lenses (361) at the rear position are all located at the focal point of the focusing lenses (361) at the front position; The thermal radiation electromagnetic waves reflected by the white body corner plate (351) pass through the plurality of focusing lenses (361) and are focused on the detector (38).

4. The on-line measuring device for pavement paving temperature according to claim 3, characterized in that: The receiving end of the detector (38) is located at the focus of the post-positioned focusing lens (361), and the modulation disk (37) is located between the post-positioned focusing lens (361) and the detector (38); The modulation disk (37) adjusts the thermal radiation electromagnetic wave passing through the post-positioned focusing lens (361) into a variable electromagnetic wave signal.

5. The on-line measuring device for pavement paving temperature according to claim 1, characterized in that: The measuring wheel rim (31) and the measuring wheel frame (32) are both made of heat-insulating materials, and the right-angle reflection cylinder (35) and the horizontal focusing cylinder (36) are both made of heat-insulating materials, and a plurality of heat-insulating plates (331) are arranged in the vacuum chamber (33); Wherein, the heat insulation plate (331) is sequentially arranged between two adjacent heat conduction plates (34).

6. The on-line measuring device for pavement paving temperature according to claim 1, characterized in that: The heat conducting plate (34) comprises an arc-shaped heat plate (341) arranged on the outer wall of the measuring wheel rim (31) and a heat transfer plate (342) arranged in the vacuum chamber (33); A plurality of slots (343) are provided on the inner arc surface of the arc-shaped heat plate (341), a plurality of inserting plates (344) are provided on the centrifugal side of the heat transfer plate (342), and the plurality of inserting plates (344) are inserted into the plurality of slots (343).

7. The on-line measuring device for pavement paving temperature according to claim 6, characterized in that: A cavity (345) is provided in the heat transfer plate (342), and a capillary wick (346) is provided in the cavity (345); The cavity (345) is a vacuum cavity, and a heat transfer medium is arranged in the cavity (345).

8. The on-line measuring device for pavement paving temperature according to claim 1, characterized in that: A plurality of right-angle reflection cylinders (35) are arranged alternately on both sides at one end between the measuring wheel ring (31) and the measuring wheel frame (32); The width of the measuring wheel frame (32) is smaller than the width of the measuring wheel rim (31), and the measuring wheel frame (32) is centrally fixed on the inner ring wall of the measuring wheel rim (31); Wherein, the plurality of modulation disks (37) and the plurality of detectors (38) are staggeredly arranged on both sides of the measuring wheel frame (32) and are located in the inner ring of the measuring wheel ring (31).

9. The on-line measuring device for pavement paving temperature according to claim 1, characterized in that: Heat insulation covers (311) are provided on both sides of the measuring wheel rim (31); The portion of the right-angle reflection tube (35) located outside the measuring wheel rim (31), the horizontal focusing tube (36), the modulation disk (37) and the detector (38) are all located in a cavity formed by the heat insulation cover (311), the measuring wheel rim (31) and the measuring wheel frame (32).

10. The on-line measuring device for pavement paving temperature according to claim 9, characterized in that: A cooling mechanism (5) is provided on the fixing frame (1), and the cooling mechanism (5) comprises a cold water tank (51) and a circulation pump (52) which are interconnected via a pipeline; A cooling pipeline (53) and a return pipeline (54) are respectively provided on the two heat-insulating covers (311) on each of the measuring wheel rims (31), and the heat-insulating covers (311) are sealingly rotatably connected to the measuring wheel rims (31); Wherein, a plurality of the cooling pipelines (53) are connected in parallel to the circulation pump (52), and a plurality of the return pipelines (54) are connected in parallel to the cold water tank (51).

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