Concrete aggregate water content measuring device

Abstract

The utility model relates to the technical field of concrete detection, in particular to a concrete aggregate moisture content measuring device which comprises a near-infrared moisture measuring module, and the near-infrared moisture measuring module comprises a photoelectric conversion plate, a light path assembly, an infrared light source turntable, a rotating shaft, a light converter, a control processing unit, a digital processing unit and an analysis control and transmission unit. The infrared light source rotating disc is of a disc structure, the circle center of the infrared light source rotating disc is connected with the rotating shaft, and a plurality of infrared light-emitting tubes with different infrared wavelengths are arranged on the infrared light source rotating disc. The rotating shaft is connected with a motor of the light changer; the light path assembly is matched with the infrared light-emitting tube; the photoelectric conversion plate is connected with the digital processing unit; the digital processing unit is connected with the analysis control and transmission unit, the analysis control and transmission unit is also connected with the control processing unit, and the control processing unit is connected with the light converter. According to the utility model, real-time and rapid measurement of the water content of concrete aggregate and switching of light sources with different infrared wavelengths are realized based on near-infrared light.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete detection, in particular to a concrete aggregate moisture content measuring device. Background Art

[0002] The water-cement ratio of concrete during production directly affects the strength and construction performance (slump) of concrete. An incorrect water-cement ratio will lead to concrete quality problems or concrete scrapping. The moisture content in fine aggregate, the raw material of concrete, is an important detection object of the water-cement ratio. The drying method is currently recognized as the most accurate method for testing the moisture content of fine aggregate, but this method has problems such as long detection time (more than four hours), delayed results, and poor sample representativeness. The measurement frequency of the moisture content of fine aggregate, the raw material of concrete, is relatively high. It must be measured at least once in each shift and each warehouse. The number of tests must be increased in rainy and snowy weather, so measurement efficiency is particularly important. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and propose a concrete aggregate moisture content measuring device. Based on near-infrared light, the device can realize real-time and rapid measurement of the concrete aggregate moisture content. At the same time, it is easy to replace the infrared light source and realize the switching of light sources with different infrared wavelengths.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A device for rapid measurement of moisture content of concrete aggregate based on near-infrared light comprises a near-infrared moisture measurement module, wherein the near-infrared moisture measurement module comprises a photoelectric conversion board, an optical path component, an infrared light emitting tube, an infrared light source turntable, a rotating shaft, a motor, a light converter, a control processing unit, a digital processing unit, and an analysis control and transmission unit; the infrared light source turntable is a disc structure, the center of which is connected to the rotating shaft, and a plurality of infrared light emitting tubes with different infrared wavelengths are arranged on the infrared light source turntable; each infrared light emitting tube is evenly distributed on a circumference with the axis of the rotating shaft as a circle; the rotating shaft is connected to a motor of the light converter, and the light converter drives the infrared light source turntable through the motor to realize switching of light sources with different infrared wavelengths; the optical path component and The infrared light-emitting tubes are matched, and all the infrared light-emitting tubes will stop precisely at the only fixed position of the light source of the optical path component after the infrared light source turntable stops rotating. The light of the infrared light-emitting tube reaches the sample material to be measured through the optical path component and is reflected and gathered to the photoelectric conversion board; the photoelectric conversion board is connected to the digital processing unit, which is used to analyze and process the photoelectric signal converted by the photoelectric conversion board; the digital processing unit is connected to the analysis control and transmission unit, which is also connected to the control processing unit, which is connected to the optical converter, and the analysis control and transmission unit collects and analyzes the data of the digital processing unit, and coordinates the control processing unit to adjust the optical converter to switch to different infrared wavelengths for measurement according to the data analysis results.

[0006] Furthermore, the moisture content rapid measurement device also includes a computer and host computer software, a lifting device, a sample barrel and a stirring unit of the sample barrel; the analysis control and transmission unit of the near-infrared moisture determination module is connected to the computer and the host computer software to achieve data interaction with the computer and the host computer software; the computer and the host computer software are connected to the lifting device for controlling the near-infrared moisture determination module and the controller for controlling the stirring unit. The analysis control and transmission unit controls the lifting device to lift the near-infrared moisture determination module, which is convenient for manual placement of the sample material to be measured into the sample barrel, and controls the stirring unit of the sample barrel to achieve stirring of the fine aggregate material sample to be measured.

[0007] Furthermore, the stirring unit includes a stirring shaft and blades and a stirring motor. The stirring motor is connected to a controller. The controller controls the stirring motor, and the stirring motor drives the stirring shaft and blades to rotate.

[0008] Furthermore, the moisture content rapid measuring device is powered by a lithium battery.

[0009] Furthermore, the bottom of the moisture content rapid measuring device is equipped with walking wheels to facilitate on-site detection.

[0010] Technical effects of the utility model:

[0011] Compared with the prior art, the utility model can measure the moisture content of concrete aggregate in real time and quickly, thereby improving the measurement efficiency; through the infrared light source turntable and the light changer, the measurement is realized by switching light sources of different wavelengths, which is convenient for the design, processing and installation of optical path components, improves the interchangeability and consistency of light sources and optical path components, and achieves the purpose of improving the accuracy of the measuring equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the near-infrared moisture measurement module of the utility model;

[0013] Figure 2 The utility model is a schematic structural diagram of a device for quickly measuring moisture content of concrete aggregate based on near infrared light.

[0014] In the figure, 111, near-infrared moisture determination module; 1, sample material to be measured; 2, photoelectric conversion board; 3, optical path component; 4, infrared light-emitting tube; 5, infrared light source turntable; 6, rotating shaft; 7, motor; 8, light converter; 9, control processing unit; 10, digital processing unit; 11, analysis control and transmission unit; 12, computer and host computer software; 13, operation button; 14, lifting device; 15, sample barrel; 16, stirring shaft and blades; 17, stirring motor; 18, controller; 19, walking wheel; 20, battery. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is clearly and completely described below in conjunction with the accompanying drawings of the specification.

[0016] Embodiment 1:

[0017] like Figure 1 As shown, this embodiment relates to a device for rapid measurement of moisture content of concrete aggregate based on near-infrared light, including a near-infrared moisture measurement module 111 , a computer and host computer software 12 , a lifting device 14 , and a sample bucket 15 .

[0018] The near-infrared moisture determination module 111 includes a photoelectric conversion plate 2, an optical path component 3, an infrared light-emitting tube 4, an infrared light source turntable 5, a rotating shaft 6, a motor 7, a light converter 8, a control processing unit 9, a digital processing unit 10, and an analysis control and transmission unit 11; the infrared light source turntable 5 is a disk structure, the center of which is connected to the rotating shaft 6, and a plurality of infrared light-emitting tubes 4 with different infrared wavelengths are arranged on the infrared light source turntable 5, for example, the wavelengths are 950nm, 1050nm, 1350nm, 1200nm, 1400nm, and 1650nm; each infrared light-emitting tube 4 is evenly distributed on the circumference of a circle with the axis of the rotating shaft 6 as the circle; the rotating shaft 6 is connected to the motor 7 of the light converter 8, and the light converter 8 drives the infrared light source turntable 5 through the motor 7 to realize the switching of light sources with different infrared wavelengths; The optical path component 3 is matched with the infrared light emitting tube 4. After the infrared light source turntable 5 stops rotating, all the infrared light emitting tubes 4 will stop precisely at the only fixed position of the light source of the optical path component 3. The light of the infrared light emitting tube 4 passes through the optical path component 3 to reach the sample material 1 to be measured and is reflected and concentrated on the photoelectric conversion board 2; the photoelectric conversion board 2 is connected to the digital processing unit 10, which is used to analyze and process the photoelectric signal converted by the photoelectric conversion board 2; the digital processing unit 10 is connected to the analysis control and transmission unit 11, and the analysis control and transmission unit 11 is also connected to the control processing unit 9, and the control processing unit 9 is connected to the optical converter 8. The analysis control and transmission unit 11 collects and analyzes the data of the digital processing unit 10, and coordinates the control processing unit 9 to adjust the optical converter 8 to switch to different infrared wavelengths for measurement according to the data analysis results.

[0019] like Figure 2As shown, the analysis control and transmission unit 11 is connected to the computer and the host computer software 12, and realizes data interaction with the computer and the host computer software 12. The computer and the host computer software 12 are provided with an operation button 13, and the operation button 13 is connected to the lifting device 14 for lifting the near-infrared moisture determination module 111. A sample barrel 15 and a stirring unit of the sample barrel 15 are arranged below the near-infrared moisture determination module 111. The stirring unit includes a stirring shaft and blades 16, and a stirring motor 17. The operation button 13 is also connected to a controller 18 for controlling the stirring motor 17. The analysis control and transmission unit 11 controls the stirring unit of the sample barrel 15 to achieve stirring of the fine aggregate material sample to be tested. The analysis control and transmission unit 11 can also lift the near-infrared moisture determination module 111 by controlling the lifting device 14, so as to facilitate manual placement of the sample material 1 to be tested into the sample barrel 15. The above technical solution realizes human-machine interactive control of the stirring motor 17 and the lifting device 14 of the stirring unit to realize automated operation.

[0020] During measurement, the infrared light emitting tube 4 emits infrared light of a specific wavelength, which is processed by the optical path component 3 and then irradiates the parallel light onto the sample material 1 to be measured. Part of the infrared light is absorbed by the sample, and the other part of the infrared light is scattered and collected by the concave mirror of the optical path component 3 to the near-infrared sensor on the photoelectric conversion board 2.

[0021] To facilitate on-site measurement, the bottom of the moisture content rapid measuring device is equipped with a walking wheel 19, and the instrument is powered by a battery 20, making the measurement more convenient. Preferably, the moisture content rapid measuring device is powered by a 48 watt (24V*2A) lithium battery to achieve uniform stirring and measurement, and each measurement time does not exceed 2 minutes, with low power consumption, energy saving and environmental protection.

[0022] When measuring, first push the measuring device to the part that needs to be measured. The depth of the fine aggregate bin varies from 10 to 30 meters, the width varies from 6 to 15 meters, the height of the retaining wall is nearly 4 meters, and the fine aggregate stock varies from 1,000 to 2,000 tons. Therefore, the moisture content of fine aggregate in the same bin will vary in different parts. In order to make the sample more representative, the upper, middle and lower parts of the forklift loading part in the fine aggregate bin can be sampled. Control the lifting device 14 to lift the near-infrared moisture determination module 111, pour all fine aggregate samples into the sample barrel 15 of the measuring equipment, the sample barrel 15 automatically stirs, and the three types of fine aggregates in the upper, middle and lower parts are evenly stirred, and the lifting device 14 is controlled to lower the near-infrared moisture determination module 111. Turn on the computer and the host computer software 12, start measuring and record and upload the measurement results.

[0023] The utility model can be used for real-time measurement of the moisture content of fine aggregate at the loading position of a forklift in a fine aggregate bin, realizing fast and convenient (sampling at any position on site and measuring as the sampling is performed) detection of the moisture content of fine aggregate, improving measurement efficiency and sample representativeness, and the measurement result storage device can also be uploaded to a remote server in real time.

[0024] The utility model has a fast measurement speed, and the sampling can be carried out at any time according to the actual situation on site. The total time from pouring the sample into the sample barrel 15 to completing the measurement does not exceed 2 minutes after sampling. It avoids the problem that the traditional method needs to take samples from the silo and send them to the central laboratory or test group, which is far away, and the moisture content may change due to human factors or climate after sampling, resulting in the problem that the sample is not representative.

[0025] The above-mentioned specific implementation methods are only specific cases of the present utility model. The patent protection scope of the present utility model includes but is not limited to the above-mentioned specific implementation methods. Any appropriate changes or modifications made to them by ordinary technicians in the relevant technical field in accordance with the claims of the present utility model shall fall within the patent protection scope of the present utility model.

Claims

1. A concrete aggregate moisture content measuring device, characterized in that: The near-infrared moisture determination module (111) comprises a photoelectric conversion plate (2), an optical path component (3), an infrared light emitting tube (4), an infrared light source turntable (5), a rotating shaft (6), a motor (7), a light converter (8), a control processing unit (9), a digital processing unit (10), and an analysis control and transmission unit (11); the infrared light source turntable (5) is a disk structure, the center of which is connected to the rotating shaft (6); a plurality of infrared light emitting tubes (4) with different infrared wavelengths are arranged on the infrared light source turntable (5); each infrared light emitting tube (4) is evenly distributed on a circumference with the axis of the rotating shaft (6) as the center. The rotating shaft (6) is connected to the motor (7) of the optical converter (8), and the optical converter (8) drives the infrared light source turntable (5) through the motor (7); the optical path component (3) matches the infrared light emitting tube (4), and the light of the infrared light emitting tube (4) passes through the optical path component (3) to reach the sample material (1) to be tested and is reflected and concentrated to the photoelectric conversion plate (2); the photoelectric conversion plate (2) is connected to the digital processing unit (10); the digital processing unit (10) is connected to the analysis control and transmission unit (11), and the analysis control and transmission unit (11) is also connected to the control processing unit (9), and the control processing unit (9) is connected to the optical converter (8).

2. The concrete aggregate moisture content measuring device according to claim 1, characterized in that: The moisture content rapid measurement device further comprises a computer and host computer software (12), a lifting device (14), a sample barrel (15) and a stirring unit of the sample barrel (15); the analysis control and transmission unit (11) of the near-infrared moisture determination module (111) is connected to the computer and the host computer software (12); the computer and the host computer software (12) are connected to the lifting device (14) for controlling the near-infrared moisture determination module (111) and a controller (18) for controlling the stirring unit.

3. The concrete aggregate moisture content measuring device according to claim 2, characterized in that: The stirring unit comprises a stirring shaft and blades (16) and a stirring motor (17), and the stirring motor (17) is connected to a controller (18).

4. The concrete aggregate moisture content measuring device according to claim 1, characterized in that: The water content rapid measurement device is powered by a lithium battery (20).

5. The concrete aggregate moisture content measuring device according to claim 1, characterized in that: A running wheel (19) is installed at the bottom of the moisture content rapid measurement device.

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