CN110658188A - Concrete carbonation depth detector and detection method - Google Patents

Abstract

The invention provides a concrete carbonation depth detector and a detection method. The concrete carbonation depth detector includes a casing, a measuring device, a liquid spraying device and a blowing device, and the casing is provided with an air inlet, an air outlet and a display unit , There is a detection port on the plane part of the shell, and the diameter of the detection port is larger than the diameter of the hole to be measured on the surface of the concrete measurement area; A sliding drive mechanism, a data processor, a guide bracket and a fixed bracket are provided. The liquid spray device includes a reagent bottle, a low-pressure electric water pump, an infusion tube and a spray head, and the blower device includes a motor and an impeller. The concrete carbonation depth detector of the invention integrates the functions of blasting, liquid spraying and measurement, and is convenient to carry and use; the laser displacement sensor is used for automatic and intelligent measurement of the carbonation depth, and the measurement accuracy is greatly improved.

Description

Concrete carbonation depth detector and detection method

technical field

The invention belongs to the technical field of concrete detection in civil engineering, in particular to a structural improvement of a concrete carbonation depth detector and an improvement of a detection method.

Background technique

The carbonation depth is an important indicator of the durability of concrete. When measuring the carbonation depth of concrete, the drilling method is usually used, that is, a hole with a diameter of about 15mm and a depth of more than 10mm is drilled on the surface of the measurement area. The shape of the hole is approximately conical. The inner diameter of the hole is gradually reduced from the opening to the bottom of the hole, and then the powder and debris in the hole are removed with a blower device, and then the phenolphthalein alcohol reagent with a concentration of 1% is sprayed on the edge of the inner wall of the hole. When it is clear, use the depth measuring tool to measure the vertical distance from the interface of carbonized and uncarbonized concrete to the concrete surface for several times, the reading is accurate to 0.5mm, and the average value is taken as the carbonization depth value of the measuring area.

However, at present, the measuring device, the blowing device and the liquid spraying device usually need to be taken out separately during operation, and the cleaning method of the debris and powder in the hole is generally to use an ear-blow ball to blow out the gas to remove the powder and debris, and then take it out. The spray bottle containing 1% phenolphthalein alcohol reagent sprays liquid at the edge of the inner wall of the hole. Each part is separated and needs to be taken out and used separately during operation. It is easy to lose during use and storage, and the operation is inconvenient; For mechanical scale measurement, the average value is taken after successive measurements, the measurement accuracy is not high, and the measurement result has a large error.

SUMMARY OF THE INVENTION

The invention provides a concrete carbonation depth detector and a detection method. The detector integrates air blasting, liquid spraying and measurement, and is convenient to carry. The detection method using the detector has high measurement efficiency and measurement accuracy.

In order to achieve the above-mentioned technical purpose, the concrete carbonation depth detector proposed by the present invention adopts the following technical solutions to realize: a concrete carbonation depth detector is characterized in that, comprising:

a housing, a measuring device integrated in the housing, a liquid spray device and a blowing device, a power supply provided in the housing, a power switch provided on the housing and connected to the power supply, provided on the housing for controlling the measurement A first control switch for the device to work, and a second control switch provided on the casing to control the simultaneous operation of the liquid spray device and the blower device, the first control switch and the second control switch are both compatible with the power switch connection;

The casing is provided with an air inlet, an air outlet and a display unit, and the casing has a plane part for fitting with the surface of the concrete measuring area, a circular detection port is opened on the plane part, and the The diameter of the detection port is larger than the diameter of the hole to be measured on the surface of the concrete measurement area;

The measuring device includes a ring-shaped illumination light source, a vision sensor, a PLC controller, a laser displacement sensor, a rotational drive mechanism, a radial sliding drive mechanism, a data processor, a guide bracket and a fixed bracket, the vision sensor, the PLC controller , The laser displacement sensor and the data processor are connected in communication, and when the plane part is attached to the surface of the concrete measuring area, the detection end of the laser displacement sensor is flush with the opening of the hole to be measured on the surface of the concrete measuring area;

The fixing bracket is fixed in the casing, and the rotation driving mechanism, the PLC controller and the data processor are installed on the fixing bracket;

The rotation driving mechanism includes a vertically placed first motor, a rotating shaft coaxially fixed with the output shaft of the first motor, and a support plate, the support plate is fixedly connected with the rotating shaft and has a horizontal support surface, so The rotating shaft is coaxial with the detection port and extends into the detection port, the visual sensor and the annular illumination light source are fixed on the free end of the rotating shaft, and the visual sensor is located in the center of the detection port, The annular illumination light source is concentric with the detection port and is located on the periphery of the vision sensor;

The guide bracket is fixed on the circumferential side wall of the annular illumination light source, and has a guide hole extending along the radial direction of the detection port, and the laser displacement sensor is arranged on the guide bracket and can be along the The guide hole slides radially;

The radial sliding drive mechanism is used to drive the laser displacement sensor to slide radially along the guide hole, and includes a second motor placed laterally, a circular turntable set vertically, a connecting rod and a fixed guide rod. The second motor is fixed on the support surface of the support plate, the circular turntable is eccentrically mounted on the output shaft of the second motor, and the circular turntable is formed with an annular guide rail concentric with it. One end of the rod is fixedly connected with the laser displacement sensor, and the other end is fixedly connected with a first sliding block, a second sliding block is fixed on the first sliding block, and the first sliding block is slidably matched with the annular guide rail , the fixed guide rod is fixedly arranged, and the second sliding block is slidably matched with the fixed guide rod;

The liquid spray device includes a reagent bottle containing phenolphthalein alcohol reagent, a low-pressure electric water pump, an infusion tube and a spray head, the reagent bottle and the low-pressure electric water pump are fixed in the casing, and the liquid inlet end of the infusion tube is fixed. Extend into the reagent bottle, the liquid outlet end is located outside the reagent bottle and is connected to the liquid inlet end of the low-pressure electric water pump, and the liquid outlet end of the low-pressure electric water pump is connected to the nozzle through a pipeline, and the nozzle fixed in the air outlet;

The blowing device includes a motor and an impeller driven and rotated by the motor, the motor is fixed in the casing, the air inlet is located on the air inlet side of the impeller, and the air outlet is located on the air outlet of the impeller. side.

The length direction of the fixed guide rod is in the horizontal direction. The rod is slidably fitted, the first sliding block has a guide groove extending in the vertical direction, and the first sliding block is slidably matched with the annular guide rail with its guide groove.

The air outlet is formed on the flat portion and is located on one side of the detection port.

A partition plate is fixed in the casing for separating the blowing device from the measuring device.

The measuring device further includes an auxiliary fixing bracket, the auxiliary fixing bracket is fixed in the casing and located above the fixing bracket, and a through hole is formed on the auxiliary fixing bracket, and the rotating shaft passes through the through hole, so that the The first motor is fixed on the fixing bracket and sandwiched between the auxiliary fixing bracket and the fixing bracket.

The measuring device further includes a memory connected to the data processor, a USB interface is provided on the casing, the memory is further connected to the USB interface, and the power supply is connected to the USB interface.

A liquid injection port is formed on the reagent bottle, and the liquid injection port is configured with a sealed bottle cap, and the sealed bottle cap is exposed outside the casing, so that the liquid injection port can be opened or closed from the outside of the casing .

A filter screen is installed on the liquid inlet end of the infusion tube.

The present invention also proposes a detection method based on the above-mentioned concrete carbonation depth detector, comprising the following steps:

1) Power on the detector: turn on the power switch to turn on the power;

2) Spray liquid and remove ash on the hole to be measured on the surface of the concrete measuring area: turn the air outlet on the detector shell towards the hole to be measured, turn on the second control switch, and the low-pressure electric water pump of the spray device starts to work. The phenolphthalein alcohol mixed reagent in the test solution bottle is transported to the nozzle through the infusion pipe and the connecting pipeline between the low-pressure electric water pump and the nozzle, and the nozzle sprays the phenolphthalein alcohol mixed reagent into the hole to be tested to realize the spraying of the hole to be tested; When the low-voltage electric water pump starts to work, the motor of the blowing device starts to work, the impeller rotates, and the airflow sucked from the air inlet is blown out from the air outlet to realize the dust removal of the hole to be measured;

3) Stop the liquid spraying and ash removal: After the liquid spraying and ash removal work is completed, turn off the second control switch, and the liquid spraying device and the blowing device stop working;

4) Measure the carbonation depth of the hole to be measured on the surface of the concrete measuring area: observe the color change of the inner wall of the hole to be measured, and after the uncarbonated concrete on the inner wall of the hole to be measured turns red, fit the plane part of the detector shell to the surface of the concrete measuring area And the detection port on the shell faces the hole to be measured, and the detection end of the laser displacement sensor is flush with the hole to be measured on the surface of the concrete measurement area; turn on the first control switch, the ring lighting source of the measurement device is turned on, the vision sensor works, and the vision sensor Scan the hole to be tested to obtain the circular boundary curve of the carbonized concrete above the inner wall of the hole to be tested and the non-carbonated concrete below, and transmit the scanned circular boundary curve information to the PLC controller, which controls the first motor and the second motor to work , so that the laser displacement sensor moves along the same curve trajectory parallel to the annular boundary curve under the joint driving action of the rotary drive mechanism and the radial sliding drive mechanism. The measured depth value is transmitted to the data processor, and the average value is displayed on the display unit after the data processor.

The maximum range of the laser displacement sensor is 50mm, and the precision is 0.1mm.

The present invention has the following advantages and positive effects:

1. The concrete carbonation depth detector of the present invention integrates the functions of blasting, spraying and measuring, is convenient to carry and use, simplifies the operation process, and improves the detection efficiency;

2. Abandoning the currently commonly used pointer measurement method, the laser displacement sensor is used to move around the trajectory parallel to the carbonized and non-carbonized annular boundary curve of the concrete to measure and take the average value to realize automatic measurement and intelligent measurement, and the measurement accuracy is greatly improved.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the front view of the concrete carbonation depth detector of the present invention;

Fig. 2 is the three-dimensional structure schematic diagram of the back perspective of the concrete carbonation depth detector of the present invention;

Fig. 3 is the three-dimensional structure schematic diagram of the bottom view of the concrete carbonation depth detector of the present invention;

Fig. 4 is the structural schematic diagram of the cutting state of the concrete carbonation depth detector of the present invention;

5 is a schematic diagram of the assembly structure of the rotating drive structure and the radial sliding drive mechanism of the measuring device of the concrete carbonation depth detector of the present invention;

6 is a schematic diagram of the assembly structure of a circular turntable, a connecting rod, a fixed guide rod, a rotating shaft, a first slider and a second slider in the concrete carbonation depth detector of the present invention.

Detailed ways

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIGS. 1 to 4 , a concrete carbonation depth detector in this embodiment includes a casing 100 , a measuring device 200 integrated in the casing 100 , a liquid spraying device 300 and a blowing device 400 , which are arranged in the casing 100 A power supply 500, a power switch 600 provided on the housing 100 and connected to the power supply 500, a first control switch provided on the housing 100 for controlling the operation of the measuring device 200, and a first control switch provided on the housing 100 for controlling the liquid spray The second control switch of the device 300 and the blower device 400 working at the same time, the first control switch and the second control switch are both connected to the power switch 600;

The housing 100 is provided with an air inlet 110, an air outlet 120 and a display unit 130, and the housing 100 has a plane portion 140 for fitting with the surface of the concrete survey area, and a circular detection port 150 is opened on the plane portion 140. The diameter of the detection port 150 is larger than the diameter of the hole to be measured on the surface of the concrete measuring area, so that it can completely cover the hole to be measured;

The measuring device 200 includes a ring-shaped illumination light source 210, a visual sensor 220, a PLC controller 230, a laser displacement sensor 240, a rotation driving mechanism 250, a radial sliding driving mechanism 260, a data processor 270, a guide bracket 280 and a fixed bracket 290, and a visual sensor 220, the PLC controller 230, the laser displacement sensor 240 and the data processor 270 are communicatively connected to each other so as to realize data or signal transmission; when the plane portion 140 of the housing 100 is in contact with the surface of the concrete survey area, the laser displacement sensor 240 The detection end is flush with the opening of the hole to be measured on the surface of the concrete measurement area;

The fixing bracket 290 is fixed in the housing 100 as a supporting bracket for some components in the housing 100, for example, the rotating drive mechanism 250, the PLC controller 230 and the data processor 270 are installed on the fixing bracket 290;

Wherein, as shown in FIGS. 5 and 6 , the rotational drive mechanism 250 includes a vertically placed first motor 251 , a rotating shaft 252 coaxially fixed with the output shaft of the first motor 251 , and a support plate 253 , and the support plate 253 is connected to the rotating shaft 252 is fixed and has a horizontal support surface. In this embodiment, the support plate 253 is a horizontal plate, and its axis coincides with the rotating shaft 252. The rotating shaft 252 is coaxial with the detection port 150 and extends into the detection port 150. The visual sensor 220 and The ring illumination light source 210 is fixed on the free end of the rotating shaft 252, and the visual sensor 220 is located in the center of the detection port 150, and the ring illumination light source 210 is concentric with the detection port 150 and is located at the periphery of the visual sensor 220;

The guide bracket 280 is fixed on the circumferential side wall of the annular illumination light source 210 and has a guide hole 281 extending along the radial direction of the detection port 150 . For example, as shown in FIG. 5, the laser displacement sensor 240 has a guide portion 241, the guide portion 241 is embedded in the guide hole 281, and there is a movable gap between the guide portion 241 and the guide hole 281, so that the laser displacement sensor 240 can be operated under the action of external force. Sliding radially along the guide hole 281; when the first motor 251 works, it drives the visual sensor 220, the annular illumination light source 210, the guide bracket 280, the laser displacement sensor 240, the support plate 253 and the following second motor 261 through the rotating shaft 252. Rotate together, control the rotational speed and direction of the first motor 261 through the PLC controller 230, and then control the rotational speed and direction of the circumferential rotation of the laser displacement sensor 240;

The radial sliding drive mechanism 260 is used to drive the laser displacement sensor 240 to slide radially along the guide hole 281, as shown in FIG. 5 and FIG. The rod 263 and the fixed guide rod 264, the second motor 261 is fixed on the support surface of the support plate 253, the circular turntable 262 is eccentrically installed on the output shaft of the second motor 261, and the circular turntable 262 is formed with a concentric with it. The annular guide rail 265, the connecting rod 263 is in an inverted L shape, one end of which is fixedly connected with the laser displacement sensor 240, and the other end is fixedly connected with a first sliding block 266, and a second sliding block 267 is fixed on the first sliding block 266. The sliding block 266 is slidingly matched with the annular guide rail 265, the fixed guide rod 264 is fixedly arranged, the second sliding block 267 is slidingly matched with the fixed guide rod 264, and the second sliding block 267 can slide back and forth along the length direction of the fixed guide rod 264 under the action of external force; When the second motor 261 works, the circular turntable 262 rotates eccentrically, so that the sliding fit between the first slider 266 and the annular guide rail 265, the sliding fit between the second slider 267 and the fixed guide rod 264, and the fixed guide rod 264 are not fixed. The first slider 266 , the second slider 267 and the connecting rod 263 slide along the fixed guide rod 264 , thereby driving the laser displacement sensor 240 to slide along the guide hole 281 . The rotation speed and direction of the second motor 261 are controlled by the PLC controller 230, thereby controlling the sliding distance and direction of the laser displacement sensor 240 along the guide hole 281; The laser displacement sensor 240 rotates circumferentially in a plane parallel to the opening of the hole to be measured while sliding along the radial direction of the detection port 150, so that the motion trajectory of the laser displacement sensor 240 is an annular curve;

As shown in FIG. 4 , the liquid spraying device 300 includes a reagent bottle 310 containing phenolphthalein alcohol reagent, a low-pressure electric water pump 320, an infusion tube 330 and a spray head 340. The reagent bottle 310 and the low-pressure electric water pump 320 are fixed in the casing 100, and the liquid infusion The liquid inlet end of the pipe 330 extends into the reagent bottle 310, and the liquid outlet end is located outside the reagent bottle 310 and is connected to the liquid inlet end of the low-pressure electric water pump 320, and the liquid outlet end of the low-pressure electric water pump 320 is connected to the nozzle 340 through the pipeline 350. 340 is fixed in the air outlet 120, and can be fixed by gluing or snap-fastening; when the low-pressure electric water pump 320 is working, the phenolphthalein alcohol reagent in the reagent bottle 310 is extracted through the infusion pipe 330 and transported to the vial 350. The nozzle 340 is sprayed into the hole to be measured on the surface of the concrete survey area by the nozzle 340, so as to realize the spray operation of the hole to be measured on the surface of the concrete survey area;

The blower device 400 includes a motor 410 and an impeller 420 driven and rotated by the motor 410. The motor 410 is fixed in the casing 100, the air inlet 110 on the casing 100 is located on the air inlet side of the impeller 420, and the air outlet 120 is located on the air inlet side of the impeller 420. The air outlet side of the impeller 420, so that when the motor 410 drives the impeller 420 to rotate, a negative pressure is formed, and the airflow outside the detector housing 100 is sucked into the housing 100 through the air inlet 110 and blown out through the air outlet 120, so as to realize the detection of the surface of the concrete measurement area. The ash removal operation of the hole to be measured; the second control switch controls the liquid spraying device 300 and the blowing device 400 to work at the same time, thereby realizing the simultaneous operation of the liquid spraying and the blowing ash removal, and improving the measurement efficiency.

Further, the length direction of the fixed guide rod 264 is in the horizontal direction. As shown in FIG. 5 and FIG. 6 , the fixed guide rod 264 is a horizontally arranged straight rod, one end of which is fixedly connected to the rotating shaft 252, and the other end is sleeved on the first rod. There is a radial gap between the output shaft of the second motor 261 and the output shaft of the second motor 261 so as not to affect the normal rotation of the output shaft of the second motor 261 and the circular turntable 262; The guide groove of the fixed guide rod 264 is parallel to the length direction, and the second slider 267 is slidably matched with the fixed guide rod 264 with its guide groove, so that it can slide back and forth along the length direction of the fixed guide rod 264 under the action of external force; The slider 266 has a guide groove extending in the vertical direction. The guide groove of the first slider 266 is slidably matched with the annular guide rail 265 so as not to affect the rotation of the annular guide rail 265 with the circular turntable 262 .

For further convenience of operation, the air outlet 120 is formed on the plane portion 140 and is located at one side of the detection port 150 . That is to say, the air outlet 120 and the detection port 150 are on the same plane. When spraying liquid and blasting to remove dust, directly make the plane part 140 face the hole to be measured, the air outlet 120 is aligned with the hole to be measured, and spray liquid and blast to remove dust. After the end, slightly move the position of the detector to make the plane part 140 fit on the surface of the concrete measurement area, and the detection port 150 can be aligned with the hole to be measured.

In order to make the overall structure of the detector well-proportioned, so that it can be placed stably, a partition plate 700 is fixed in the casing 100, as shown in FIG. The device is spaced apart from the measuring device 200 .

Since the measuring device 200 has both circumferential rotation and radial sliding, in order to improve the smoothness of its motion and help ensure the measurement accuracy, the measuring device 200 further includes an auxiliary fixing bracket 2100 , and the auxiliary fixing bracket 2100 is fixed on the casing 100 . Inside and above the fixing bracket 290, a through hole 2101 is opened on it, the rotating shaft 252 passes through the through hole 2101, and there is a gap between the through hole 2101 and the rotating shaft 252, so as not to affect the normal rotation of the rotating shaft 252, while the through hole 2101 It also acts as a certain circumferential constraint on the rotating shaft 252. The first motor 251 is fixed on the fixing bracket 290 and sandwiched between the auxiliary fixing bracket 2100 and the fixing bracket 290, which also effectively ensures the stability of the first motor 251. , thereby greatly improving the motion stability of the measuring device 200 .

Further, the measuring device 200 further includes a memory 2110 connected to the data processor 270 , the casing 100 is provided with a USB interface 160 , the memory 2110 is also connected to the USB interface 160 , and the power supply 500 is connected to the USB interface 160 . In addition to being displayed on the display unit 130, the measured data processed by the data processor 270 can also be stored in the memory 2110, and output the stored data through the USB interface 160 for concrete carbonization analysis and the like.

In order to facilitate the replenishment of the phenolphthalein alcohol reagent in the reagent bottle 310, a liquid injection port is formed on the reagent bottle 310, and the liquid injection port is provided with a sealed bottle cap 311, and the sealed bottle cap 311 is exposed outside the casing 100, so that the outside of the casing 100 can be Open or close the fill port.

Further, a filter screen is installed on the liquid inlet end of the infusion tube 330 to prevent impurities in the reagent from entering the nozzle 340 through the infusion tube 330, thereby preventing the nozzle 340 from being blocked.

In order to simplify the overall structure of the detector, in this embodiment, the first control switch and the second control switch are integrated into a three-way switch 800 . The water pump 320 is connected to the motor 410 of the blower device 400 through a line, and the line connected to the liquid spray device 300 is connected in parallel with the line connected to the motor 410, so that the three-way switch 800 can be operated to one side at the same time. Wind, the first motor 251, the second motor 261, and the annular lighting source 210 of the measuring device 200 are connected in parallel on another route of the three-way switch 800, so that the three-way switch 800 is manipulated to the other side to illuminate and measure simultaneously.

This embodiment also proposes a detection method using the concrete carbonation depth detector described in this embodiment, including the following steps:

1) Power on the detector: turn on the power switch 600 to turn on the power;

2) Spray liquid and remove dust on the hole to be measured on the surface of the concrete measuring area: turn the air outlet 120 on the detector housing 100 towards the hole to be measured, turn on the three-way switch 800, and start the low-pressure electric water pump 320 of the spray device 300 Work, the phenolphthalein alcohol mixed reagent in the test solution bottle 310 is transported to the nozzle 340 through the infusion pipe 330 and the connecting pipeline 350 between the low-pressure electric water pump 320 and the nozzle 340, and the nozzle 340 sprays the phenolphthalein alcohol mixture into the hole to be tested. When the low-pressure electric water pump 320 starts to work, the motor 410 of the blower device 400 starts to work, the impeller 420 rotates, and the air inhaled from the air inlet 110 is blown out from the air outlet 120 to realize the hole to be measured. ash removal;

3) Stop the liquid spraying and ash removal: After the liquid spraying and ash removal work is completed, turn off the three-way switch 800, and the liquid spraying device 300 and the blowing device 400 stop working;

4) Measure the carbonation depth of the hole to be measured on the surface of the concrete measuring area: observe the color change of the inner wall of the hole to be measured, and after the uncarbonated concrete on the inner wall of the hole to be measured turns red, connect the plane portion 140 of the detector housing 100 to the concrete measuring area The surface is attached and the detection port 150 on the housing 100 faces the hole to be measured. At this time, the detection end of the laser displacement sensor 340 is flush with the hole to be measured on the surface of the concrete measurement area. Turn on the three-way switch 800 to make the ring of the measurement device 200 The illumination light source 210 is turned on, the vision sensor 220 works, the vision sensor 220 scans the hole to be tested to obtain the annular boundary curve of the carbonized concrete above the inner wall of the hole to be measured and the non-carbonized concrete below, and transmits the scanned annular boundary curve information to the PLC controller 230 Inside, the PLC controller 230 controls the first motor 251 and the second motor 261 to work, so that the final motion trajectory of the laser displacement sensor 240 under the joint driving action of the rotary driving mechanism 250 and the radial sliding driving mechanism 260 is parallel to the annular boundary curve and The same, and move for a circle along the motion trajectory. During the movement, the laser displacement sensor 240 measures the depth of each point on the circle of the annular boundary curve, that is, the vertical distance between the measurement end of the laser displacement sensor 240 and each point on the circle of the circular boundary curve. The measured depth value is transmitted to the data processor 270 , and the average value is obtained by the data processor 270 and displayed on the display unit 130 .

Among them, the visual sensor 220 can also be replaced by a common color sensor, a sensor that compares the color of the object with the annular boundary curve information stored in the PLC controller 230 to detect the color, and when the two colors match within a certain error range, the output Test results.

Further, the maximum range of the laser displacement sensor 240 is 50 mm, and the accuracy is 0.1 mm, which can measure concrete with a carbonation depth exceeding 10 mm, and the error is small.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not 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 can still The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed in the present invention.

Claims (10)

1. a concrete carbonation depth detector, is characterized in that, comprises: a housing, a measuring device integrated in the housing, a liquid spray device and a blowing device, a power supply provided in the housing, a power switch provided on the housing and connected to the power supply, provided on the housing for controlling the measurement A first control switch for the device to work, and a second control switch provided on the casing to control the simultaneous operation of the liquid spray device and the blower device, the first control switch and the second control switch are both compatible with the power switch connection; The casing is provided with an air inlet, an air outlet and a display unit, and the casing has a plane part for fitting with the surface of the concrete measuring area, a circular detection port is opened on the plane part, and the The diameter of the detection port is larger than the diameter of the hole to be measured on the surface of the concrete measurement area; The measuring device includes a ring-shaped illumination light source, a vision sensor, a PLC controller, a laser displacement sensor, a rotational drive mechanism, a radial sliding drive mechanism, a data processor, a guide bracket and a fixed bracket, the vision sensor, the PLC controller , The laser displacement sensor and the data processor are connected in communication, and when the plane part is attached to the surface of the concrete measuring area, the detection end of the laser displacement sensor is flush with the opening of the hole to be measured on the surface of the concrete measuring area; The fixing bracket is fixed in the casing, and the rotation driving mechanism, the PLC controller and the data processor are installed on the fixing bracket; The rotation driving mechanism includes a vertically placed first motor, a rotating shaft coaxially fixed with the output shaft of the first motor, and a support plate, the support plate is fixedly connected with the rotating shaft and has a horizontal support surface, so The rotating shaft is coaxial with the detection port and extends into the detection port, the visual sensor and the annular illumination light source are fixed on the free end of the rotating shaft, and the visual sensor is located in the center of the detection port, The annular illumination light source is concentric with the detection port and is located on the periphery of the vision sensor; The guide bracket is fixed on the circumferential side wall of the annular illumination light source, and has a guide hole extending along the radial direction of the detection port, and the laser displacement sensor is arranged on the guide bracket and can be along the The guide hole slides radially; The radial sliding drive mechanism is used to drive the laser displacement sensor to slide radially along the guide hole, and includes a second motor placed laterally, a circular turntable set vertically, a connecting rod and a fixed guide rod. The second motor is fixed on the support surface of the support plate, the circular turntable is eccentrically mounted on the output shaft of the second motor, and the circular turntable is formed with an annular guide rail concentric with it. One end of the rod is fixedly connected with the laser displacement sensor, and the other end is fixedly connected with a first sliding block, a second sliding block is fixed on the first sliding block, and the first sliding block is slidably matched with the annular guide rail , the fixed guide rod is fixedly arranged, and the second sliding block is slidably matched with the fixed guide rod; The liquid spray device includes a reagent bottle containing phenolphthalein alcohol reagent, a low-pressure electric water pump, an infusion tube and a spray head, the reagent bottle and the low-pressure electric water pump are fixed in the casing, and the liquid inlet end of the infusion tube is fixed. Extend into the reagent bottle, the liquid outlet end is located outside the reagent bottle and is connected to the liquid inlet end of the low-pressure electric water pump, and the liquid outlet end of the low-pressure electric water pump is connected to the nozzle through a pipeline, and the nozzle fixed in the air outlet; The blowing device includes a motor and an impeller driven and rotated by the motor, the motor is fixed in the casing, the air inlet is located on the air inlet side of the impeller, and the air outlet is located on the air outlet of the impeller. side. 2 . The concrete carbonation depth detector according to claim 1 , wherein the length direction of the fixed guide rod is along a horizontal direction, and the second slider has an extension direction parallel to the length direction of the fixed guide rod. 3 . The guide groove of the second sliding block is slidably matched with the fixed guide rod with its guide groove, the first sliding block has a guide groove extending in the vertical direction, and the first sliding block is connected with the guide groove with its guide groove. The annular guide rails are slidably fitted. 3 . The concrete carbonation depth detector according to claim 1 , wherein the air outlet is formed on the plane portion and located at one side of the detection port. 4 . 4 . The concrete carbonation depth detector according to claim 3 , wherein a partition plate is fixed in the casing to separate the blowing device from the measuring device. 5 . 5 . The concrete carbonation depth detector according to claim 4 , wherein the measuring device further comprises an auxiliary fixing bracket, and the auxiliary fixing bracket is fixed in the casing and located above the fixing bracket, 6 . A through hole is opened thereon, the rotating shaft passes through the through hole, and the first motor is fixed on the fixing bracket and sandwiched between the auxiliary fixing bracket and the fixing bracket. 6 . The concrete carbonation depth detector according to claim 1 , wherein the measuring device further comprises a memory, the memory is connected to the data processor, and the shell is provided with a USB interface, and the The memory is also connected to the USB interface, and the power supply is connected to the USB interface. 7 . The concrete carbonation depth detector according to claim 1 , wherein a liquid injection port is formed on the reagent bottle, and the liquid injection port is configured with a sealed bottle cap, and the sealed bottle cap is exposed on the the outside of the housing, so that the liquid injection port can be opened or closed from the outside of the housing. 8 . The concrete carbonation depth detector according to claim 1 , wherein a filter screen is installed on the liquid inlet end of the infusion pipe. 9 . 9. the detection method based on the concrete carbonation depth detector described in any one of claim 1 to 8, is characterized in that, comprises the steps: 1) Power on the detector: turn on the power switch to turn on the power; 2) Spray liquid and remove ash on the hole to be measured on the surface of the concrete measuring area: turn the air outlet on the detector shell towards the hole to be measured, turn on the second control switch, and the low-pressure electric water pump of the spray device starts to work. The phenolphthalein alcohol mixed reagent in the test solution bottle is transported to the nozzle through the infusion pipe and the connecting pipeline between the low-pressure electric water pump and the nozzle, and the nozzle sprays the phenolphthalein alcohol mixed reagent into the hole to be tested to realize the spraying of the hole to be tested; When the low-voltage electric water pump starts to work, the motor of the blowing device starts to work, the impeller rotates, and the airflow sucked from the air inlet is blown out from the air outlet to realize the dust removal of the hole to be measured; 3) Stop the liquid spraying and ash removal: After the liquid spraying and ash removal work is completed, close the second control switch, and the liquid spraying device and the blowing device stop working; 4) Measure the carbonation depth of the hole to be measured on the surface of the concrete measuring area: observe the color change of the inner wall of the hole to be measured, and after the uncarbonated concrete on the inner wall of the hole to be measured turns red, stick the plane part of the detector shell to the surface of the concrete measuring area. The detection port on the combined shell faces the hole to be measured, and the detection end of the laser displacement sensor is flush with the hole of the hole to be measured on the surface of the concrete measurement area; turn on the first control switch, the ring lighting source of the measurement device is turned on, the vision sensor works, and the vision The sensor scans the hole to be tested to obtain the annular boundary curve of the carbonized concrete above the inner wall of the hole to be tested and the non-carbonized concrete below, and transmits the scanned circular boundary curve information to the PLC controller, which controls the first motor and the second motor. Work, make the laser displacement sensor move for a circle along the same curve trajectory parallel to the annular boundary curve under the joint driving action of the rotary drive mechanism and the radial sliding drive mechanism. During the moving process, the laser displacement sensor measures the depth of one circle of the annular boundary curve. , and transmit the measured depth value to the data processor, and the average value is displayed on the display unit after the data processor. 10 . The detection method according to claim 9 , wherein the laser displacement sensor has a maximum range of 50 mm and an accuracy of 0.1 mm. 11 .

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