A flatness detection device for highway construction

Abstract

The present invention discloses a flatness detection device for highway construction, and relates to the technical field of highway detection devices. It includes a longitudinal track, a transverse track, and a measuring device, wherein the measuring device includes two sliding blocks, each of which has a through hole on its outer wall, and each of which has a movable groove on its bottom outer wall. A measuring ruler is arranged on the outer wall of the two sliding blocks, and a measuring plate is slidably arranged inside the two sliding blocks. A connecting shaft is arranged on the outer wall of the measuring plate, and the connecting shaft slides up and down in the corresponding through hole. A comparison ruler is arranged on the outer wall of each measuring plate, and a bidirectional pointer is fixedly arranged on the outer wall of the measuring ruler. When the sliding block moves forward, when encountering an uneven ground, the measuring plate will appear to be high on one side and low on the other side. The inclination angle of the comparison ruler is observed by pointing the bidirectional pointer, and the unevenness value of the ground at that place is detected accordingly, so that the staff can make timely repairs.

Description

Technical Field

[0001] The invention relates to the technical field of highway detection devices, and in particular to a flatness detection device for highway construction. Background Art

[0002] Highway refers to a public road that can be used for driving between cities, between urban and rural areas, and in the countryside. Highways include roadbeds, pavements, bridges, etc. When constructing highways, it is necessary to test the quality of highways. Among them, the detection of the flatness of the highway pavement is an important part, that is, the flatness effect of each layer will be accumulated and reflected on the pavement surface. Flatness is an important link in the acceptance and maintenance of the pavement. The pavement flatness is an important indicator in the pavement evaluation and pavement construction acceptance. It mainly reflects the flatness of the pavement longitudinal section profile curve. When the pavement longitudinal section profile curve is relatively smooth, it means that the pavement is relatively flat and the flatness is relatively good. In the traditional highway pavement flatness detection, some relatively primitive methods are often used, such as using a three-meter-long ruler to lay flat, and then inserting a wedge-shaped feeler gauge into the larger gap under the ruler to read the reading. This method is inconvenient to operate and requires a lot of manual participation. It not only increases the workload of the staff, but also may limit the accuracy and efficiency of the detection results. Summary of the invention

[0003] The purpose of the present invention is to provide a flatness detection device for highway construction, which solves the technical problem mentioned in the background technology that in the traditional highway road surface flatness detection, some relatively primitive methods are often used, such as using a three-meter-long straightedge to lay it flat and then inserting a wedge-shaped feeler gauge into the larger gap under the straightedge to read the reading. This method is inconvenient to operate and requires a lot of manual participation, which not only increases the workload of the staff, but also may lead to technical problems such as the accuracy and efficiency of the detection results being limited.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flatness detection device for highway construction, comprising a longitudinal track, a transverse track, and a measuring device, wherein the measuring device comprises two sliding blocks, each of the sliding blocks has a through hole on its outer wall, each of the sliding blocks has a movable groove on its bottom outer wall, each of the movable grooves has a corresponding measuring plate slidably arranged on its inner wall, a measuring ruler is fixedly arranged on one side outer wall of each sliding block, a rotating shaft is fixedly arranged on the outer wall of each measuring ruler, a bidirectional pointer is fixedly arranged on the outer wall of each rotating shaft, a connecting shaft is fixedly arranged on the outer wall of each measuring plate, each of the connecting shafts is slidably plugged with the corresponding through hole, a comparison ruler is arranged on the outer wall of each measuring plate, the transverse track is located above the longitudinal track slidably arranged, and the measuring device is slidably arranged on the outer wall of the transverse track;

[0005] The inner walls of the two sliding blocks are fixedly provided with a limiting device, each of the limiting devices includes a third driving motor, the output end of each of the third driving motors is fixedly provided with a connecting rod, the end of each of the connecting rods away from the corresponding third driving motor is fixedly provided with a clamping head, and the outer wall of each of the clamping heads is provided with an open groove;

[0006] The longitudinal track comprises a first drive motor and two first drive tracks, the ends of the two first drive tracks are fixedly provided with mounting plates, the first drive motor is located on the top of one of the mounting plates on the left side, the output end of the first drive motor is fixedly connected to one end of the corresponding first drive track, and the outer wall of each of the first drive tracks is provided with a first track groove;

[0007] The transverse track comprises a second driving motor, a fixing seat, and a second driving track, wherein the outer wall of the second driving track is provided with a second track groove, the second driving motor and the bottom outer wall of the fixing seat are both provided with a first driving slider, the output end of the second driving motor is fixedly connected to one end of the second driving track, and the other end of the second driving track is fixedly connected to the fixing seat;

[0008] The outer wall of each sliding block is provided with a block groove, and the inner walls of each block groove are fixedly provided with second driving sliders on both sides, and each block groove is respectively located above the corresponding through hole;

[0009] The second driving motor and the fixing seat are electrically and slidably connected to the corresponding first driving tracks through the first driving sliders, and each of the first driving sliders is slidably connected to the corresponding first track groove;

[0010] Each of the measuring devices is electrically slidably connected to the transverse track, the two sliding blocks are electrically slidably connected to the second driving track through the provided block grooves, and each of the second driving sliding blocks is slidably connected to the inner wall of the second track groove;

[0011] A universal wheel is fixedly arranged on the bottom outer wall of each mounting plate;

[0012] A first driving slider is fixedly arranged on the bottom outer wall of the second driving motor and the fixed seat, the first driving motor is started to energize the first driving track, the first driving track generates a magnetic force, thereby driving the second driving motor and the fixed seat to move longitudinally on the corresponding first driving track, a second driving track is arranged between the second driving motor and the fixed seat, and the measuring device is driven to move longitudinally as the second driving track moves, the second driving motor is started to energize the second driving track, the second driving track generates a magnetic force, thereby driving the two measuring devices to slide on the second driving track, and stop running after sliding to the position where measurement is required, and the third driving motor is started to drive the clamping head to rotate and engage with the second track groove, and a measuring ruler is arranged on the outer walls of the two sliding blocks, and a measuring ruler is opened on the outer walls of the two sliding blocks There is a through hole, and movable grooves are opened at the bottom of the two sliding blocks. A measuring plate is slidably arranged inside each movable groove. A connecting shaft is arranged on the outer wall of the measuring plate. The connecting shaft slides up and down and is plugged in the corresponding through hole. A comparison ruler is arranged on the outer wall of each measuring plate. The comparison ruler corresponds to the measuring ruler, and the scale value of the comparison ruler and the measuring ruler is the same. A two-way pointer is fixedly arranged on the outer wall of the measuring ruler. The length of the set measuring plate is smaller than the length of the inner wall of the movable groove. When the sliding block moves forward, when encountering an uneven ground, the measuring plate will appear high on one side and low on the other side. The inclination angle of the comparison ruler is observed by pointing the two-way pointer, and the unevenness value of the ground at that location is detected accordingly. At the same time, the measuring device that can move longitudinally and laterally is arranged, so that the device can detect multiple areas.

[0013] Compared with the related art, the road construction flatness detection device provided by the present invention has the following beneficial effects:

[0014] 1. The present invention provides a flatness detection device for highway construction. The device comprises measuring rulers on the outer walls of two sliding blocks, through holes on the outer walls of the two sliding blocks, movable grooves on the bottoms of the two sliding blocks, a measuring plate slidably arranged inside each movable groove, a connecting shaft on the outer wall of the measuring plate, the connecting shaft slides up and down in the corresponding through hole, a comparison ruler on the outer wall of each measuring plate, the comparison ruler corresponds to the measuring ruler, the scale values ​​of the comparison ruler and the measuring ruler are the same, a bidirectional pointer is fixedly arranged on the outer wall of the measuring ruler, when the sliding block moves forward, when encountering an uneven ground, the measuring plate will appear high on one side and low on the other side, the inclination angle of the comparison ruler is observed by the pointing of the bidirectional pointer, and the unevenness value of the ground at that location is detected accordingly, so that the staff can make timely repair work.

[0015] 2. The present invention provides a flatness detection device for highway construction. The second driving motor is started to drive two measuring devices to slide on the second driving track. The two measuring devices stop running after sliding to the position to be measured. The second track grooves are opened on the outer walls on both sides of the second driving track. The two third driving motors are started. The two third driving motors respectively drive the corresponding connecting rods to rotate. As the connecting rods rotate, the clamping heads are driven to engage with the second track grooves to ensure the stability of the measuring devices. As the second driving track moves, the measuring devices are driven to move longitudinally. When the sliding block moves forward, when encountering an uneven ground, the measuring plate will appear to be higher on one side and lower on the other side. The inclination angle of the comparison ruler is observed by pointing the bidirectional pointer, and the unevenness value of the ground at that location is detected accordingly. The measuring device is fixed and limited by the clamping head, and the measurement accuracy is guaranteed to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a structural schematic diagram of the first driving slider of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the transverse track of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the second driving track of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the longitudinal track of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the measuring device of the present invention;

[0022] Figure 7 It is an exploded view of a part of the structure of the measuring device of the present invention;

[0023] Figure 8 It is an exploded view of the structure of another angle of the measuring device of the present invention;

[0024] Fig. 9 For the present invention Figure 7 A magnified view of the structure at center;

[0025] Fig.10 For the present invention Figure 3 Enlarged view of the structure at point B in the middle.

[0026] In the figure: 1, longitudinal track; 101, mounting plate; 102, first drive motor; 103, first drive track; 104, universal wheel; 105, first track groove; 2, transverse track; 201, second drive motor; 202, fixed seat; 203, first drive slider; 204, second drive track; 205, second track groove; 3, measuring device; 301, sliding block; 302, block groove; 303, second drive slider; 304, through hole; 305, movable groove; 306, measuring plate; 307, connecting shaft; 308, measuring ruler; 309, rotating shaft; 310, two-way pointer; 311, comparison ruler; 4, limit device; 401, third drive motor; 402, connecting rod; 403, clamping head; 404, opening groove. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figure 1-Figure 9The present invention provides a technical solution: a flatness detection device for highway construction, comprising a longitudinal track 1, a transverse track 2, and a measuring device 3, wherein the measuring device 3 comprises two sliding blocks 301, each of which has a through hole 304 on its outer wall, a movable groove 305 on its bottom outer wall, a corresponding measuring plate 306 slidably disposed on the inner wall of each movable groove 305, a measuring ruler 308 fixedly disposed on one side outer wall of each sliding block 301, a rotating shaft 309 fixedly disposed on the outer wall of each measuring ruler 308, a bidirectional pointer 310 fixedly disposed on the outer wall of each rotating shaft 309, and a measuring plate 306 fixedly disposed on its outer wall. A connecting shaft 307 is fixedly provided, and each connecting shaft 307 is slidably plugged with a corresponding through hole 304, and a comparison ruler 311 is provided on the outer wall of each measuring plate 306. The transverse track 2 is located above the longitudinal track 1 and is slidably provided. The measuring device 3 is slidably provided on the outer wall of the transverse track 2. The longitudinal track 1 includes a first driving motor 102 and two first driving tracks 103. The ends of the two first driving tracks 103 are fixedly provided with mounting plates 101. The first driving motor 102 is located at the top of one of the mounting plates 101 on the left side. The output end of the first driving motor 102 is fixedly connected to one end of the corresponding first driving track 103. Each first driving track 103 The outer wall of each sliding block 301 is provided with a first track groove 105, the transverse track 2 includes a second driving motor 201, a fixed seat 202, and a second driving track 204, the outer wall of the second driving track 204 is provided with a second track groove 205, the second driving motor 201 and the bottom outer wall of the fixed seat 202 are provided with a first driving slider 203, the output end of the second driving motor 201 is fixedly connected to one end of the second driving track 204, and the other end of the second driving track 204 is fixedly connected to the fixed seat 202, the outer wall of each sliding block 301 is provided with a block groove 302, and the inner walls of each block groove 302 are fixedly provided with second driving sliders 303, and each block groove 302 is respectively Located above the corresponding through hole 304, the second drive motor 201 and the fixed seat 202 are electrically slidably connected to the corresponding first drive track 103 through the set first drive slider 203, each first drive slider 203 is slidably connected to the corresponding first track groove 105, each measuring device 3 is electrically slidably connected to the transverse track 2, the two sliding blocks 301 are electrically slidably connected to the second drive track 204 through the set block groove 302, each second drive slider 303 is slidably connected to the inner wall of the second track groove 205, and the bottom outer wall of each mounting plate 101 is fixedly provided with a universal wheel 104, and the scale value of the comparison ruler 311 is the same as that of the corresponding measuring ruler 308.

[0029] In this embodiment, a first driving slider 203 is fixedly provided on the bottom outer wall of the second driving motor 201 and the fixed seat 202, and the first driving motor 102 is started to energize the first driving track 103, so that the first driving track 103 generates a magnetic force, thereby driving the second driving motor 201 and the fixed seat 202 to move longitudinally on the corresponding first driving track 103, and a second driving track 204 is provided between the second driving motor 201 and the fixed seat 202. As the second driving track 204 moves, the measuring device 3 is driven to move longitudinally, and a measuring ruler 308 is provided on the outer walls of the two sliding blocks 301, through holes 304 are provided on the outer walls of the two sliding blocks 301, and movable grooves 305 are provided on the bottoms of the two sliding blocks 301, and a measuring plate 306 is slidably provided inside each movable groove 305, and a connecting shaft 307 is provided on the outer wall of the measuring plate 306. The measuring plates 306 are slidably inserted up and down inside the corresponding through holes 304. The outer wall of each measuring plate 306 is provided with a comparison ruler 311, which corresponds to the measuring ruler 308. The scale value of the comparison ruler 311 and the measuring ruler 308 is the same. The outer wall of the measuring ruler 308 is fixedly provided with a two-way pointer 310. The length of the measuring plate 306 is set less than the inner wall length of the movable groove 305. When the sliding block 301 moves forward, when encountering an uneven ground, the measuring plate 306 will appear high on one side and low on the other side. The inclination angle of the comparison ruler 311 is observed by the pointing of the two-way pointer 310, and the unevenness value of the ground at that place is detected accordingly. The detection data is more accurate and it is convenient for the staff to make timely repairs. At the same time, the measuring device 3 that can move vertically and horizontally is set, so that the device can detect multiple areas, which is convenient for the staff to judge the flatness of the area and effectively avoids the phenomenon of measurement omission.

[0030] Example 2: Please refer to Figure 1-Figure 10 As shown, on the basis of embodiment 1, the present invention provides a technical solution: the inner walls of the two sliding blocks 301 are fixedly provided with a limiting device 4, each limiting device 4 includes a third driving motor 401, and the output end of each third driving motor 401 is fixedly provided with a connecting rod 402, and the end of each connecting rod 402 away from the corresponding third driving motor 401 is fixedly provided with a clamping head 403, and the outer wall of each clamping head 403 is provided with an opening groove 404.

[0031] In this embodiment, when the device is used, the device is first placed on the road surface to be measured, and the second driving track 204 is energized by starting the second driving motor 201. The second driving track 204 generates a magnetic force so that the two measuring devices 3 slide on the second driving track 204, and stop running after sliding to the position to be measured. The second track grooves 205 are opened on the outer walls of both sides of the second driving track 204, and the two third driving motors 401 are started. The two third driving motors 401 respectively drive the corresponding connecting rods 402 to rotate, and as the connecting rods 402 rotate, the clamping head 403 is driven to rotate with the second track. The track groove 205 is engaged to ensure the stability of the measuring device 3. A second driving track 204 is arranged between the second driving motor 201 and the fixed seat 202. As the second driving track 204 moves, the measuring device 3 is driven to move longitudinally. When the sliding block 301 moves forward, when encountering an uneven ground, the measuring plate 306 will appear to be higher on one side and lower on the other side. The inclination angle of the comparison ruler 311 is observed by pointing to the bidirectional pointer 310, and the unevenness value of the ground at that location is detected accordingly. The measuring device 3 is fixed and limited by the clamping head 403, which ensures the accuracy of the measurement to a certain extent.

[0032] Working principle: When the device is used, first place the device on the road surface to be measured, and then start the second driving motor 201 to energize the second driving track 204. The second driving track 204 generates magnetic force to drive the two measuring devices 3 to slide on the second driving track 204. After sliding to the position to be measured, the two third driving motors 401 are stopped, and then the two third driving motors 401 are started. The two third driving motors 401 drive the corresponding connecting rods 402 to rotate respectively. As the connecting rods 402 rotate, the clamping head 403 is driven to engage with the second track groove 205 to ensure the stability of the measuring device 3. The first driving slider 203 is fixedly arranged on the bottom outer wall of the driving motor 201 and the fixing seat 202. When the first driving motor 102 is started and the first driving track 103 is energized, the first driving track 103 generates magnetic force, thereby driving the second driving motor 201 and the fixing seat 202 to move longitudinally on the corresponding first driving track 103. A second driving track 204 is arranged between the second driving motor 201 and the fixing seat 202. As the second driving track 204 moves, the measuring device 3 is driven to move longitudinally. By arranging measuring rulers 308 on the outer walls of the two sliding blocks 301, the measuring device 3 is moved longitudinally. The outer wall of the sliding block 301 is provided with a through hole 304, and a movable groove 305 is provided at the bottom of the two sliding blocks 301. A measuring plate 306 is slidably arranged inside each movable groove 305. A connecting shaft 307 is arranged on the outer wall of the measuring plate 306. The connecting shaft 307 is slidably inserted up and down inside the corresponding through hole 304. A comparison ruler 311 is arranged on the outer wall of each measuring plate 306. The comparison ruler 311 corresponds to the measuring ruler 308, and the scale value of the comparison ruler 311 and the measuring ruler 308 is the same. A bidirectional pointer 310 is fixedly arranged on the outer wall of the measuring ruler 308. The length of 306 is less than the inner wall length of the movable groove 305. When the sliding block 301 moves forward, when encountering an uneven ground, the measuring plate 306 will appear to be high on one side and low on the other side. The inclination angle of the comparison ruler 311 is observed by the pointing of the bidirectional pointer 310 to detect the unevenness value of the ground at that location. The detection data is more accurate and convenient for the staff to make timely repairs. At the same time, by setting the measuring device 3 that can move vertically and horizontally, the device can detect multiple areas, which is convenient for the staff to judge the flatness of the area and effectively avoids the phenomenon of measurement omissions.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flatness detection device for highway construction, comprising a longitudinal track (1), a transverse track (2), and a measuring device (3), characterized in that: The measuring device (3) comprises two sliding blocks (301), each of the sliding blocks (301) having an outer wall provided with a through hole (304), each of the sliding blocks (301) having an outer wall provided with a movable groove (305) at the bottom, each of the movable grooves (305) having an inner wall provided with a corresponding measuring plate (306) slidably, each of the sliding blocks (301) having an outer wall provided with a measuring ruler (308) fixedly on one side, and each of the measuring rulers (308) having an outer wall provided with a rotating shaft (306) fixedly on the outer wall. 9), a bidirectional pointer (310) is fixedly provided on the outer wall of each rotating shaft (309), a connecting shaft (307) is fixedly provided on the outer wall of each measuring plate (306), each connecting shaft (307) is slidably plugged into a corresponding through hole (304), a comparison ruler (311) is provided on the outer wall of each measuring plate (306), the transverse track (2) is located above the longitudinal track (1) and is slidably provided, and the measuring device (3) is slidably provided on the outer wall of the transverse track (2); The inner walls of the two sliding blocks (301) are fixedly provided with a limiting device (4), each of the limiting devices (4) comprises a third drive motor (401), a connecting rod (402) is fixedly provided at the output end of each of the third drive motors (401), a clamping head (403) is fixedly provided at the end of each of the connecting rods (402) away from the corresponding third drive motor (401), and an outer wall of each of the clamping heads (403) is provided with an opening groove (404); The longitudinal track (1) comprises a first drive motor (102) and two first drive tracks (103); the ends of the two first drive tracks (103) are fixedly provided with mounting plates (101); the first drive motor (102) is located on the top of one of the mounting plates (101) on the left side; the output end of the first drive motor (102) is fixedly connected to one end of the corresponding first drive track (103); and the outer wall of each of the first drive tracks (103) is provided with a first track groove (105); The transverse track (2) comprises a second drive motor (201), a fixing seat (202), and a second drive track (204); the outer wall of the second drive track (204) is provided with a second track groove (205); the second drive motor (201) and the bottom outer wall of the fixing seat (202) are both provided with a first drive slider (203); the output end of the second drive motor (201) is fixedly connected to one end of the second drive track (204), and the other end of the second drive track (204) is fixedly connected to the fixing seat (202); The outer wall of each sliding block (301) is provided with a block groove (302), and the inner walls of each block groove (302) are fixedly provided with second driving sliding blocks (303) on both sides, and each block groove (302) is located above a corresponding through hole (304); The second driving motor (201) and the fixing seat (202) are electrically slidably connected to the corresponding first driving rails (103) via the first driving sliders (203), and each of the first driving sliders (203) is slidably connected to the corresponding first rail groove (105); Each of the measuring devices (3) is electrically slidably connected to the transverse track (2), the two sliding blocks (301) are electrically slidably connected to the second driving track (204) via the block grooves (302), and each of the second driving sliders (303) is slidably connected to the inner wall of the second track groove (205); A universal wheel (104) is fixedly disposed on the bottom outer wall of each mounting plate (101); A first driving slider (203) is fixedly arranged on the bottom outer wall of the second driving motor (201) and the fixing seat (202), the first driving motor (102) is started to energize the first driving track (103), and the first driving track (103) generates magnetic force, thereby driving the second driving motor (201) and the fixing seat (202) to move longitudinally on the corresponding first driving track (103), and a second driving track (204) is arranged between the second driving motor (201) and the fixing seat (202). As the second driving track (204) moves The measuring device (3) is driven to move longitudinally, and the second driving track (204) is powered by starting the second driving motor (201). The second driving track (204) generates magnetic force to drive the two measuring devices (3) to slide on the second driving track (204). After sliding to the position to be measured, the two measuring devices (3) stop running. The third driving motor (401) is started to drive the clamping head (403) to rotate and engage with the second track groove (205). The outer walls of the two sliding blocks (301) are provided with measuring rulers (308). A through hole (304) is provided, and a movable groove (305) is provided at the bottom of the two sliding blocks (301). A measuring plate (306) is slidably arranged inside each movable groove (305). A connecting shaft (307) is provided on the outer wall of the measuring plate (306). The connecting shaft (307) is slidably inserted up and down inside the corresponding through hole (304). A comparison ruler (311) is provided on the outer wall of each measuring plate (306). The comparison ruler (311) corresponds to the measuring ruler (308), and the scale values ​​of the comparison ruler (311) and the measuring ruler (308) are the same. Similarly, a bidirectional pointer (310) is fixedly arranged on the outer wall of the measuring ruler (308), and the length of the measuring plate (306) is smaller than the length of the inner wall of the movable groove (305). When the sliding block (301) moves forward, when encountering an uneven ground, the measuring plate (306) will appear to be higher on one side and lower on the other side. The inclination angle of the comparison ruler (311) is observed by the pointing direction of the bidirectional pointer (310), and the unevenness value of the ground at that location is detected accordingly. At the same time, by setting a measuring device (3) that can move longitudinally and transversely, the device can detect multiple areas.

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