CN104931143A - Vehicle on-line monitoring device for asphalt pavement temperature segregation - Google Patents

Abstract

The invention discloses a vehicle-mounted on-line monitoring device for asphalt pavement temperature segregation, which includes a frame-type support, a transmission assembly installed on the frame-type support, a box body arranged on the transmission assembly, and a central control device for communication connection through a remote transmission device . The transmission assembly includes a pair of bearings, ball screws, ball sliders, guide rails, guide rail sliders and mounting plates; the box includes a housing, a partition in the housing, an infrared thermal imager located under the partition and A peltier cooling device above the board. The monitoring device of the present invention ensures that the infrared thermal imager can work normally in a high temperature environment through the setting of the semiconductor refrigeration device, and can adapt to the temperature segregation monitoring of asphalt pavements of various widths and provide the monitoring results online, so as to carry out the segregation area in time. Repair to ensure the paving quality of asphalt pavement.

Description

Vehicle-mounted online monitoring device for asphalt pavement temperature segregation

technical field

The invention relates to a monitoring device, in particular to on-line monitoring equipment for asphalt pavement temperature segregation.

Background technique

Asphalt pavement is the main form of road pavement structure at present. Temperature segregation of asphalt mixture during construction is one of the main causes of early damage to asphalt pavement. Temperature segregation refers to the condition that the temperature difference occurs due to the heat loss of asphalt mixture due to the influence of weather, construction machinery, construction technology, etc. during the storage, transportation and paving process of asphalt mixture. Temperature segregation will cause insufficient compaction. Asphalt mixtures with different temperatures undergo the same rolling process, and the technical characteristics of the road surface are different.

At present, the judgment of temperature segregation mostly depends on the experience of construction personnel, which makes the results more random and cannot guarantee the accuracy of the judgment of temperature segregation area. In addition, a measurement system composed of multiple infrared probes is used to detect the temperature segregation phenomenon in the process of asphalt pavement paving in real time, and to provide solutions in time, but the measurement system is relatively complicated and bulky, up to 8 meters long. Although the thermal imager is small in size, it can measure the entire temperature field. The measurement data is relatively comprehensive and the measurement accuracy is high. It can also intuitively display the temperature segregation area through the difference in color on the central control device. It is very useful for judging whether the asphalt pavement is The presence of segregation plays an important role. However, the temperature of the pavement during asphalt pavement paving is as high as +150°C, and the maximum temperature that the thermal imaging camera can withstand is +50°C. If the thermal imaging camera is simply installed on the construction vehicle, there is no guarantee Infrared cameras work properly and monitor accuracy.

Contents of the invention

In view of the above existing problems, the purpose of the present invention is to provide a vehicle-mounted on-line monitoring device for asphalt pavement temperature segregation, which can not only meet the high temperature environment in the process of asphalt paving, but also be able to adapt to the temperature segregation monitoring of various widths of asphalt pavement and provide timely feedback. The monitoring results can be obtained in order to repair the segregated area in time and ensure the paving quality of the asphalt pavement.

A vehicle-mounted on-line monitoring device for asphalt pavement temperature segregation of the present invention is realized by the following technical scheme:

The vehicle-mounted on-line monitoring device for asphalt pavement temperature segregation of the present invention comprises a frame-type bracket, a transmission assembly installed on the frame-type bracket, a box body arranged on the transmission assembly, and a central control device for communication connection through a remote transmission device, The frame support includes a base at its bottom, a top beam at its top, and two vertically extending columns between the base and the top beam; the transmission assembly includes a pair of bearings, ball bearings Lead screw, ball slider, guide rail, guide rail slider and mounting plate, the bearings are respectively arranged in the corresponding holes of the base and the top beam, the ball screw is supported by the bearing and protrudes from it One end of the top beam is provided with a steering wheel, the guide rail is arranged on the column along the vertical direction, the guide rail slider is sleeved on the guide rail, and the mounting plate is arranged on the ball slider and fixedly connected with the guide rail slider; and the box body includes a housing, a partition located in the housing, an infrared thermal imager located below the partition and a semiconductor refrigeration device located above the partition device.

Preferably, the semiconductor refrigeration device includes an S-shaped ventilation assembly and a plurality of semiconductor refrigeration sheets arranged at intervals on the outer wall of the ventilation assembly, and an air duct is arranged in the ventilation assembly, and in the The outer walls on both sides of the ventilation assembly are respectively provided with semiconductor refrigeration chips.

Preferably, the monitoring device is also provided with a pulse encoder and a remote transmission device, and the data information collected by the pulse encoder is transmitted to the central control device through the remote transmission device for data analysis and processing.

Preferably, the partition divides the interior of the box into a lower chamber containing the infrared thermal imager and an upper chamber containing the semiconductor refrigeration device, the top wall of the housing and the The side walls of the lower cavity are respectively provided with ventilation openings, the middle ventilation opening is provided on the partition, and the first free end of the ventilation assembly is provided with a first boss upwards, and the first boss extends into the In the ventilation opening of the top wall, the second free end of the ventilation assembly is provided with a second boss downward, and the second boss extends into the lower chamber through the middle ventilation opening on the partition middle.

Preferably, the infrared thermal imager is fixed in the screw hole of the housing by a fixing strip and screws surrounding its side wall, and a temperature sensor switch is arranged on the side wall of the infrared thermal imager for use It is used to monitor the temperature of the infrared thermal imager and perform switch adjustment according to the preset high temperature threshold and low temperature threshold.

Preferably, the high temperature threshold is 44°C-46°C, and the low temperature threshold is 15°C-20°C.

Preferably, the ball slider includes a slider sleeved on the ball screw and a support plate below it.

Preferably, the refrigerating circuit of the semiconductor refrigerating device is composed of a refrigerating plate drive circuit, a temperature sensor switch and a plurality of the refrigerating plates arranged in parallel in series.

Compared with the prior art, the present invention has the following advantages:

(1) The present invention utilizes an infrared thermal imager to realize accurate online monitoring of the temperature of all points on the entire road surface. The imager is arranged in layers in a box, and the temperature of the air in the air duct of the semiconductor refrigeration device located in the upper cavity of the box is reduced through the semiconductor cooling sheet, thereby reducing the temperature around the infrared thermal imager located in the lower cavity of the box , The semiconductor refrigeration device can effectively control the ambient temperature around the infrared thermal imager within the range of 0°C to +50°C, thus ensuring the normal operation of the infrared thermal imager in the high-temperature environment on site.

(2) The present invention uses the number of pulses collected by the pulse coder to calculate the distance of asphalt pavement paving, obtain the road surface position of asphalt pavement temperature segregation, and make the temperature segregation area displayed by the central control device correspond to the specific position of the road surface.

(3) The present invention is provided with transmission assembly, when paving the road surface narrower, can reduce the position of thermal imaging camera by lead screw transmission system, when paving the road surface wider, raise the position of thermal imaging camera, thereby It is guaranteed that the thermal imaging camera captures the temperature of the pavement over the entire width of the pavement.

(4) The bracket of the present invention can be conveniently installed on the construction vehicle to realize the vehicle-mounted setting of the monitoring device, and then realize the vehicle-mounted on-line monitoring of the temperature segregation of the entire paved road surface.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the assembly of the vehicle-mounted on-line monitoring device for asphalt pavement temperature segregation of the present invention;

Fig. 2 is the three-dimensional schematic view of the transmission assembly of the monitoring device of the present invention;

Fig. 3 is the front view of the transmission assembly of the monitoring device of the present invention;

Fig. 4 is the casing schematic diagram of monitoring device of the present invention;

Fig. 5 is the three-dimensional schematic view of the semiconductor refrigeration device of the monitoring device of the present invention;

Fig. 6 is a schematic diagram of the refrigeration circuit of the semiconductor refrigeration device of the present invention; and

Fig. 7 is a schematic block diagram of data information transmission of the monitoring device of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Fig. 1, the vehicle-mounted on-line monitoring device 1 for asphalt pavement temperature segregation of the present invention includes a frame bracket 100, a transmission assembly 200 installed on the bracket 100, a box body 300 arranged on the transmission assembly 200, and a remote transmission device 122 Central control device 123 for communication connection. Each component will be described in detail below.

As shown in FIGS. 1-3 , the frame support 100 includes a base 111 at the bottom, a top beam 112 at the top, and two vertically extending columns 113 connecting the base 111 and the top beam 112 . In order to improve the strength of the frame support 100 , a plurality of beams 114 are arranged horizontally and spaced apart between the two columns 113 . The frame bracket 100 can be installed on a construction vehicle used for asphalt road paving, so as to realize the vehicle-mounted setting of the monitoring device 1 .

As shown in FIGS. 2 and 3 , the transmission assembly 200 includes a pair of bearings 3 , a ball screw 4 , a ball slider 13 , a guide rail 12 , a guide rail slider 6 and a mounting plate 5 . The pair of bearings 3 are respectively arranged in the hole of the base 111 and the corresponding through hole of the top beam 112 along the vertical centerline Z of the monitoring device 1, and the ball screw 4 is supported by the pair of bearings 3 and protrudes from one end of the top beam 112. A steering wheel 8 is provided, and the ball slider 13 includes a slider 131 sleeved on the ball screw 4 and a support plate 132 located below it. The guide rail 12 is vertically arranged on each column 113 , and the guide rail slider 6 is sleeved on the guide rail 12 . Preferably, each column 113 is provided with two guide rail sliders 6 . The mounting plate 5 is arranged on the support plate 132 of the ball slider 13 and is fixedly connected with the slider 131, and the mounting plate 5 is fixedly connected with the guide rail slider 6 through a fixing device such as a screw, so that the ball can be driven by turning the steering wheel 8 The slider 13 moves on the ball screw 4, and the ball slider 13 drives the mounting plate 5 to move on the guide rail through the four guide rail sliders 6. When adjusted to a certain height, the locker 9 on the guide rail slider 6 will now The position of the mounting plate is locked to realize the adjustment of the height position of the mounting plate 5.

The box body 300 is arranged on the mounting plate 5 of the transmission assembly 200 through a fastening device. As shown in FIG. 4 , the box body 300 includes a substantially square housing 10 , a partition 20 located in the housing 10 , an infrared thermal imager 11 located below the partition 20 and a semiconductor refrigeration device 7 located above the partition 20 . The partition 20 divides the inside of the box body 300 into a lower chamber 28 containing the infrared camera 11 and an upper chamber 29 containing the semiconductor refrigeration device 7 . The top wall 101 of the housing 10 is provided with a ventilation opening 21 , the partition 20 has a middle ventilation opening 19 , and the side wall of the lower chamber 28 of the housing 10 is provided with a ventilation opening 24 so as to ensure the air pressure balance in the housing 10 . The thermal imaging camera 11 is fixed in the screw hole 23 of the housing 10 through the fixing bar 15 surrounding its side wall and screws, and the thermal imaging camera 11 is spaced apart from the housing 10 due to the setting of the fixing bar 15 . The temperature sensor switch 22 is arranged on the side wall of the thermal imaging camera 11 and is used for monitoring the temperature of the thermal imaging camera 11 and adjusting the switch. The temperature sensor switch 22 sets a high temperature threshold and a low temperature threshold. In a preferred embodiment, the high temperature threshold is 44°C-46°C, the low temperature threshold is 15°C-20°C, and the values of the high temperature threshold and the low temperature threshold are the same as It is related to the rated operating temperature of the infrared thermal imaging camera. When the temperature in the box 300 is higher than the high temperature threshold, the temperature sensor switch 22 is closed, and when the temperature in the box 300 is lower than the low temperature threshold, the temperature sensor switch 22 is turned off.

In addition, the side wall of the lower cavity 28 of the housing 10 is also provided with a plurality of small holes with encryption valves as required, preferably three small holes are provided as shown in Figure 4, wherein the thermal imaging camera The power line of 11 is connected to the small hole 16, the data transmission line is connected to the small hole 17, the temperature sensor switch connection line is connected to the small hole 18, and the 220V power line required by the infrared thermal imager 11 is connected from the construction vehicle . The shell 10, the partition 20 and the fixing bar 15 of the box 300 are preferably made of 304L stainless steel plate so as to make the device resistant to high temperature and obtain sufficient strength.

As shown in FIG. 5 , the peltier cooling device 7 includes a substantially S-shaped ventilation assembly 25 and a plurality of peltier cooling fins 26 arranged at intervals on the outer wall of the ventilation assembly 25 . The ventilation assembly 25 is provided with an air duct 257 and is composed of a first horizontal ventilation assembly 251, a first longitudinal ventilation assembly 252, a middle horizontal ventilation assembly 253, a second longitudinal ventilation assembly 254 and a second horizontal ventilation assembly near the front of the housing 10. The components 255 are connected sequentially. The outer walls on both sides of each ventilation assembly 25 are respectively provided with semiconductor cooling fins 26 , in a specific embodiment, on the outer walls on both sides of the first cross ventilation assembly 251 , the middle cross ventilation assembly 253 and the second cross ventilation assembly 255 Two semiconductor cooling chips 26 are respectively installed, and one semiconductor cooling chip 26 is respectively installed on the outer walls of both sides of the first longitudinal ventilation assembly 252 and the second longitudinal ventilation assembly 254, wherein the semiconductor cooling chips are TEC1-12708 semiconductor cooling chips. As shown in FIG. 6 , all 16 semiconductor cooling chips 26 are connected in parallel and then connected in series with the cooling chip driving circuit 31 and the temperature sensor switch 22 to form the cooling circuit of the semiconductor cooling device 7 . The first free end of the first horizontal ventilation assembly 251 is upwardly provided with a first boss 256, and the first boss 256 stretches into the air vent 21 of the top wall 101, so that the air channel 257 in the ventilation assembly 25 is just in line with the air vent. 21 directly connected, in order to inhale hot air in the environment. Similarly, a second boss 258 is provided downwards at the second free end of the second transverse ventilation assembly 255, and the second boss 258 extends into the lower chamber 28 through the middle ventilation opening 19 on the dividing plate 20, so that , the hot air in the environment inhaled from the vent 21 is blown into the lower cavity 28 from the air duct 257 in the second boss 258 after being cooled by the semiconductor cooling sheet 26, so that the infrared thermal image located in the lower cavity 28 The thermal imaging camera 11 is cooled, thereby ensuring the normal operating temperature range of the infrared thermal imaging camera 11. Therefore, the temperature segregation area of the asphalt pavement is monitored by using the semiconductor refrigeration device 7 to keep the thermal imaging camera 11 at a rated working temperature.

The vehicle-mounted on-line monitoring device 1 for asphalt pavement temperature segregation of the present invention is also provided with a pulse coder 121, a remote transmission device 122 and a central control device 123, and the central control device 123 and the pulse coder 121 are all installed in the construction vehicle. As shown in Figure 7, the semiconductor refrigeration device 7 starts to work according to the closing of the temperature sensor switch 22 or stops the refrigeration work according to the opening of the temperature sensor switch 22, and the data information collected by the pulse encoder 121 and the infrared thermal imager 11 is passed through The remote transmission device 122 transmits the data to the central control device 123 for data analysis and processing. The pulse encoder 121 calculates the distance of asphalt paving by collecting the number of pulses. In normal use, the pulse encoder 121 continuously records the road surface position data of each temperature measurement point, such as 0.1m, 0.2m, 0.3m, etc. to locate the road surface position, the infrared thermal imaging camera 11 sends temperature field data information when the road surface position data is 0.2 meters, so that the temperature segregation area of the monitored asphalt pavement corresponds to the specific position of the road surface one by one.

The working process of the vehicle-mounted on-line monitoring device 1 for asphalt pavement temperature segregation of the present invention is as follows: the thermal imager 11 collects thermal image data information during the asphalt pavement paving process in real time, and transmits the data information to the central control device 123 via the remote transmission device 122 Analyze and process in, obtain the temperature field data information within the field of view of the infrared thermal imager 11, and intuitively display the temperature segregation area through the different colors; use the pulse coder 121 to locate the road surface position of each temperature measurement point, so that The temperature value of each temperature measuring point of the thermal imager 11 corresponds to the specific position of the asphalt road surface; the semiconductor refrigeration device 7 ensures that the thermal imager 11 located in the casing 300 works within the rated operating temperature range, if the casing 300, when the temperature around the infrared thermal imaging camera 11 exceeds the set high temperature threshold value of 45°C, the temperature sensor switch 22 is closed, and the semiconductor refrigeration device 7 starts to work, sending cold air to the surroundings of the infrared thermal imaging camera 11. If the infrared thermal imaging camera 11 When the ambient temperature is lower than the set low temperature threshold of 20° C., the temperature sensor switch 22 is turned on, and the semiconductor refrigeration device 7 stops working and no longer sends cooled cold air to the surroundings of the infrared thermal imager 11 . In this way, the temperature measurement accuracy of the infrared thermal imager 11 is ensured, the temperature segregation phenomenon during the asphalt pavement paving process is monitored in real time, and the paving quality of the asphalt pavement is improved.

In addition, the vehicle-mounted on-line monitoring device 1 for asphalt pavement temperature segregation of the present invention is also provided with a transmission assembly 200. When the height position of the infrared camera 11 needs to be adjusted, the ball slider 13 is placed on the ball screw 4 by turning the steering wheel 8 Moving, the ball slider 13 drives the mounting plate 5 fixed with the box 300 to move on the guide rail through the four guide rail sliders 6. When adjusted to a certain height, the locker 9 on the guide rail slider 6 will move to the position Locked to realize the adjustment of the height position of the mounting plate 5 and the thermal imaging camera 11 in the box body 300 .

As can be known from the above description of the asphalt pavement temperature segregation vehicle-mounted online monitoring device 1 of the present invention, the present invention has the following advantages:

(1) The present invention utilizes the thermal imaging camera 11 to realize accurate online monitoring of the temperature of all points on the entire road surface. and the infrared thermal imaging camera 11 are layered in a box body 300, and the temperature of the air in the air duct 257 of the semiconductor refrigeration device 7 in the upper cavity 29 of the box body 300 is lowered, thereby making the lower cavity of the box body 300 The temperature around the infrared thermal imager 11 in 28 drops, and the semiconductor refrigeration device 7 can effectively control the ambient temperature around the infrared thermal imager 11 within the range of 0°C to +50°C, thus ensuring that the infrared thermal imager 11 is on site It may work normally in a high temperature environment up to 150°C.

(2) The present invention utilizes the pulse number that pulse coder 121 collects to calculate the distance of asphalt pavement paving, obtains the road surface position of asphalt pavement temperature segregation, makes the temperature segregation area displayed by central control device 123 correspond to the specific position of the road surface one by one .

(3) The present invention is provided with transmission assembly 200, when paving the road surface narrower, can reduce the position of thermal imaging camera 11 by lead screw transmission system, when paving the road surface wider, raise the position of thermal imaging camera 11 position, so as to ensure that the infrared thermal imager 11 obtains the temperature of the entire paving width of the road surface.

(4) The bracket 100 of the present invention can be conveniently installed on the construction vehicle to realize the on-board installation of the monitoring device 1 , and further realize the on-board on-board monitoring of the entire paved road surface temperature segregation.

Finally, it should be noted that: the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the invention. scope.

Claims (8)

1. a bituminous pavement temperature is emanated vehicle-mounted on-Line Monitor Device, comprise frame set, the transmission component be arranged on described frame set, be arranged on the casing on described transmission component and carried out the central control unit that communicates to connect by remote transmission device, it is characterized in that:

Described frame set comprises and is arranged at the base bottom it, the back timber at its top and two vertically extending columns between described base and described back timber;

Described transmission component comprises pair of bearings, ball-screw, ball slider, guide rail, guide rail slide block and installing plate, described bearing is separately positioned in described base and the corresponding hole of described back timber, described ball-screw is by described bearings and be provided with steering wheel on one end that it stretches out described back timber, described guide rail is vertically arranged on described column, described guide rail slide block is set on described guide rail, and described installing plate to be arranged on described ball slider and to be fixedly linked with described guide rail slide block; And

Described casing comprises housing, is arranged in the dividing plate of described housing, the semiconductor cooling device being positioned at the thermal infrared imager below described dividing plate and being positioned at above described dividing plate.

2. bituminous pavement temperature according to claim 1 is emanated vehicle-mounted on-Line Monitor Device, it is characterized in that: described semiconductor cooling device comprises S-type ventilation assembly and multi-disc and is spaced apart and arranged in semiconductor chilling plate on the outer wall of described ventilation assembly, be provided with air channel in described ventilation assembly, and be respectively equipped with semiconductor chilling plate on the outer wall of described ventilation assembly both sides.

3. bituminous pavement temperature according to claim 1 is emanated vehicle-mounted on-Line Monitor Device, it is characterized in that: described monitoring device is also provided with pulse encoder and remote transmission device, the data message that described pulse encoder collects passes to described central control unit by described remote transmission device and carries out Data Analysis Services.

4. bituminous pavement temperature according to claim 2 is emanated vehicle-mounted on-Line Monitor Device, it is characterized in that: the interior separation of described casing is become to accommodate the cavity of resorption of described thermal infrared imager and accommodates the epicoele of described semiconductor cooling device by described dividing plate, the roof of described housing and the sidewall of described cavity of resorption are respectively equipped with ventilating opening, described dividing plate is provided with centre vent, first free end of described ventilation assembly is upwards provided with the first boss, described first boss extend in the ventilating opening of described roof, second free end of described ventilation assembly is to having the second boss, described second boss is extend in described cavity of resorption by the centre vent on described dividing plate.

5. bituminous pavement temperature according to claim 4 is emanated vehicle-mounted on-Line Monitor Device, it is characterized in that: described thermal infrared imager is by being fixed in the screw hole of described housing around the fixed strip of its sidewall and screw, the sidewall of described thermal infrared imager is provided with temperature sensor switch, for monitoring the temperature of described thermal infrared imager and carrying out switch-mode regulation according to the high temperature threshold value preset and low temperature threshold.

6. bituminous pavement temperature according to claim 5 is emanated vehicle-mounted on-Line Monitor Device, and it is characterized in that: described high temperature threshold value is 44 DEG C-46 DEG C, described low temperature threshold is 15 DEG C-20 DEG C.

7. bituminous pavement temperature according to claim 1 is emanated vehicle-mounted on-Line Monitor Device, it is characterized in that: described ball slider comprises the slide block be set on described ball-screw and the back up pad be positioned at below it.

8. bituminous pavement temperature according to claim 2 is emanated vehicle-mounted on-Line Monitor Device, it is characterized in that: the refrigeration circuit of described semiconductor cooling device is in series together with multiple described semiconductor chilling plate be arranged in parallel by cooling piece driving circuit, temperature sensor switch.