A method and system for detecting the uniformity of concrete in a mixing station container based on an ultrasonic array

Abstract

The present invention proposes a method and system for detecting the uniformity of concrete in a mixing station container based on an ultrasonic array. The ultrasonic detection method of the present invention can quickly measure the uniformity of concrete by calculating the uniformity and monitoring the uniformity of concrete mixing in real time, thereby obtaining the real-time density value of the freshly mixed concrete in the mixing container. The method and system of the present invention are particularly suitable for construction fields such as civil engineering and water conservancy projects that have high requirements for concrete uniformity. The method and system of the present invention solve the technical problems of uneven mixing and the impact on concrete quality, and have very important social and economic benefits for the safe use and efficient production of concrete products.

Description

Technical Field

[0001] The present application relates to the field of construction engineering, and in particular to a method and system for detecting the uniformity of concrete in a mixing station container based on an ultrasonic array. Background Art

[0002] Construction projects require a large amount of concrete, making it a crucial component of project quality. During the actual construction process, concrete is subject to influences from natural conditions, technical factors, and human factors, which can lead to quality issues in the concrete structure and even jeopardize the safety of the building during its commissioning. Concrete quality is often determined by factors such as the sand and gravel aggregate production process, raw material weighing, and mixing uniformity. Therefore, cement concrete uniformity testing is essential in construction, as it directly impacts the concrete's performance, mechanical properties, and service life.

[0003] Mixing is the process of making the mixture tend to be homogenized, and it is a key process in concrete production. The currently commonly used method for detecting the uniformity of concrete is mainly the water washing and screening method. The uniformity of concrete is calculated through manual water washing, screening, drying and weighing. It is time-consuming and labor-intensive and is only applicable to laboratory proportioning detection, lacking timeliness and on-site performance. The existing technical means is to develop an automatic screening device based on the traditional water washing and screening method to conduct on-site online concrete uniformity detection. In actual applications, it is found that after mixing, the concrete is uniform on a macroscopic level, but there are still many uneven cement clumps on a microscopic level. The existence of these problems is closely related to the uniformity of the concrete mixture and affects the quality of cement concrete. In summary, it is urgent to develop a method for efficiently and instantly detecting the uniformity of freshly mixed concrete. Summary of the Invention

[0004] In order to solve the technical problem of uneven mixing in concrete production and affecting concrete quality, the present invention provides a method for detecting the uniformity of concrete in a mixing station container based on an ultrasonic array, comprising the following steps:

[0005] Step 1: The control module controls the driving module to send a signal to drive the ultrasonic probe to emit ultrasonic waves;

[0006] Step 2: The receiving probe receives the ultrasonic signal transmitted by the fresh concrete in the container;

[0007] Step 3: The signal conditioning module amplifies and filters the received ultrasonic signal;

[0008] Step 4: The control module samples the output signal of the signal conditioning module and calculates the transmission time of the ultrasonic wave within a fixed distance of the concrete;

[0009] Step 5: Calculate the linear density of the fresh concrete based on the ultrasonic transmission time obtained in step 4;

[0010] Step 6: Calculate the surface density of the concrete based on the linear density of the concrete obtained in step 5;

[0011] Step 7: Calculate the uniformity of the fresh concrete based on the surface density of the concrete obtained in step 6;

[0012] Step 8. According to the uniformity U of the concrete obtained in step 7, the uniformity of the concrete mixture is judged and whether to continue stirring the cement concrete in the container is decided. If U = 0, the detection process ends; if the U value is not equal to 0, the mixer works and continues stirring for a period of time, waiting for the next uniformity test.

[0013] Preferably, the calculation process of calculating the linear density in step 5 is as follows:

[0014] The relationship between the propagation speed of ultrasound and the density and elastic modulus of the medium is:

[0015]

[0016] In formula (1), c is the propagation velocity of ultrasonic waves in concrete mixture, ρ is the density of concrete, and k is the volume compression coefficient of fresh concrete;

[0017] The relationship between the propagation speed and propagation time of ultrasound is:

[0018]

[0019] In formula (2), d is the propagation distance of ultrasonic wave in concrete mixture, and t is the propagation time of ultrasonic wave in concrete;

[0020] From equations (1) and (2), the linear density of fresh concrete measured by the first ultrasonic channel is:

[0021]

[0022] In formula (3), ρ 11 The linear density of fresh concrete measured by the first channel of the first layer in the ultrasonic array module;

[0023] The method for calculating the linear density of other sound channels on the same layer of fresh concrete is the same as formula (3).

[0024] Preferably, the calculation process of calculating the surface density of concrete in step 6 is as follows:

[0025]

[0026] In formula (4), ρ1 is the surface density of the first layer in the ultrasound array module, and n is the number of ultrasound probes in the first layer of the ultrasound array;

[0027] The calculation method of the surface density of other layers of the fresh concrete is the same as formula (4).

[0028] Preferably, the calculation process of the uniformity of fresh concrete in step 7 is as follows:

[0029]

[0030] In the formula is the average density of each layer of the ultrasonic array, ρ0 is the theoretical density of fresh concrete, and m is the number of concrete layers detected by the ultrasonic array.

[0031] A mixing station container concrete uniformity detection system based on an ultrasonic array is characterized in that it includes an ultrasonic transducer array module, a driving module, a signal conditioning module, a power supply module, a single-chip computer module and a display module; wherein the ultrasonic transducer array module is connected to the signal conditioning module, the signal conditioning module is connected to the single-chip computer module, the single-chip computer module is connected to the display module, the power supply module and the driving module, and the power supply module is respectively connected to the ultrasonic transducer array module, the signal conditioning module, the single-chip computer module and the driving module.

[0032] Preferably, the ultrasonic transducer array module is composed of a plurality of ultrasonic piezoelectric probes arranged in an array, and the ultrasonic piezoelectric probes include single-transmit and single-receive probes and transceiver-in-one probes; the frequency range of the ultrasonic transducer is 100-800KHz.

[0033] Preferably, the ultrasonic transducer array module is composed of a plurality of inserted water-immersed ultrasonic transmitting and receiving probes.

[0034] Preferably, the ultrasonic transducer array module is composed of a plurality of outer wall flat ultrasonic transmitting and receiving probes.

[0035] Preferably, the ultrasonic transducer array module is composed of a plurality of contact-type water-immersion ultrasonic transmitting and receiving probes.

[0036] Preferably, the ultrasonic transducer array module is composed of a plurality of contact-type water-immersion ultrasonic transceiver probes arranged in an array.

[0037] The beneficial effects of the present invention are as follows: In response to the problem of being unable to detect the uniformity of concrete in containers in a mixing station in real time, the present invention designs a uniformity detection system and method based on an ultrasonic array. The ultrasonic array system can monitor the uniformity of the concrete mixture and adjust the mixing time of the concrete in real time to obtain concrete with good uniformity and excellent density. The present invention is suitable for detecting concrete mixtures in containers of various materials, so that the quality of the concrete material can be better guaranteed, which is of great significance to improving the overall quality of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0039] Figure 1 This is a flow chart of cloud-cement uniformity detection according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the detection system according to an embodiment of the present invention;

[0041] Figure 3 Schematic diagram of the ultrasonic transducer array module structure according to an embodiment of the present invention Figure 1 ;

[0042] Figure 4 Schematic diagram of the ultrasonic transducer array module structure according to an embodiment of the present invention Figure 2 ;

[0043] Figure 5 Schematic diagram of the ultrasonic transducer array module structure according to an embodiment of the present invention Figure 3 ;

[0044] Figure 6 Schematic diagram of the ultrasonic transducer array module structure according to an embodiment of the present invention Figure 4 .

[0045] In the figure, 1-ultrasonic transducer array module, 2-power module, 3-drive module, 4-signal conditioning module, 5-single chip microcomputer module, 6-display module, 7-concrete container, 1.1~1.9-insertion type water immersion ultrasonic transmitting probe, 2.1~2.9-insertion type water immersion ultrasonic receiving probe, 3.1~3.9-external wall type flat ultrasonic transmitting probe, 4.1~4.9-external wall type flat ultrasonic receiving probe, 5.1~5.9-contact type water immersion ultrasonic transmitting probe, 6.1~6.9-contact type water immersion ultrasonic receiving probe, 7.1~7.9-contact type water immersion ultrasonic transceiver probe. DETAILED DESCRIPTION

[0046] In order to make the technical solutions and advantages of the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, and are not an exhaustive list of all the embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other unless they conflict.

[0047] Example 1, reference Figure 1 This embodiment describes a method for detecting uniformity of concrete in a mixing station container based on an ultrasonic array. The specific implementation steps include the following:

[0048] Step 1: The control module controls the driving module to send a signal to drive the ultrasonic probe to emit ultrasonic waves;

[0049] Step 2: The receiving probe receives the ultrasonic signal transmitted by the fresh concrete in the container;

[0050] Step 3: The signal conditioning module amplifies and filters the received ultrasonic signal;

[0051] Step 4: The control module samples the output signal of the signal conditioning module and calculates the transmission time of the ultrasonic wave within a fixed distance of the concrete;

[0052] Step 5: Calculate the linear density of fresh concrete based on the ultrasonic transmission time obtained in step 4. The density calculation process is as follows: the relationship between the ultrasonic propagation velocity and the medium density and elastic modulus is:

[0053]

[0054] In formula (1), c is the propagation velocity of ultrasonic waves in concrete mixture, ρ is the density of concrete, and k is the volume compression coefficient of fresh concrete;

[0055] The relationship between the propagation speed and propagation time of ultrasound is:

[0056]

[0057] In formula (2), d is the propagation distance of ultrasonic wave in concrete mixture, and t is the propagation time of ultrasonic wave in concrete;

[0058] From equations (1) and (2), the linear density of fresh concrete measured by the first ultrasonic channel is:

[0059]

[0060] In formula (3), ρ 11 The linear density of fresh concrete measured by the first channel of the first layer in the ultrasonic array module;

[0061] The method for calculating the linear density of other sound channels on the same layer of fresh concrete is the same as formula (3).

[0062] Step 6: Calculate the surface density of the concrete based on the linear density of the fresh concrete measured by the single-channel ultrasonic probe obtained in step 5. The calculation formula is as follows:

[0063]

[0064] In formula (4), ρ1 is the surface density of the first layer in the ultrasound array module, and n is the number of ultrasound probes in the first layer of the ultrasound array;

[0065] The calculation method of the surface density of other layers of the fresh concrete is the same as formula (4).

[0066] Step 7: Calculate the uniformity of fresh concrete based on the surface density of concrete obtained in step 6. The calculation process is as follows:

[0067]

[0068] In the formula is the average density of each layer of the ultrasonic array, ρ0 is the theoretical density of fresh concrete, and m is the number of concrete layers detected by the ultrasonic array.

[0069] Step 8. Based on the uniformity U of the concrete obtained in step 7, determine the uniformity of the concrete mixture and decide whether to continue stirring the cement concrete in the container. If U = 0, it means that the concrete is uniform, the mixer stops mixing, and the detection process ends; if the U value is not equal to 0, the larger the U value, the worse the uniformity of the concrete mixture, the mixer will work and continue stirring for a period of time, waiting for the next uniformity test.

[0070] Example 2, reference Figures 2 to 6To describe this embodiment, a concrete uniformity detection system for a mixing station container based on an ultrasonic array includes an ultrasonic transducer array module 1, a driving module 3, a signal conditioning module 4, a power supply module 2, a single-chip computer module 5 and a display module 6; wherein the ultrasonic transducer array module 1 is connected to the signal conditioning module 4, the signal conditioning module 4 is connected to the single-chip computer module 5, the single-chip computer module 5 is connected to the display module 6, the power supply module 5 and the driving module 3, and the power supply module 5 is respectively connected to the ultrasonic transducer array module 1, the signal conditioning module 4, the single-chip computer module 5 and the driving module 3. The power supply module 1 is used to supply power to the ultrasonic transducer array module 1, the signal conditioning module 4, the driving module 3 and the single-chip computer module 5; the ultrasonic transducer array module 1 is driven to receive and transmit ultrasonic signals, and the signal conditioning module 4 is used to amplify and filter the received ultrasonic signals; the single-chip computer module 5 transmits the processing results to the display device 6; the single-chip computer module 5 controls the driving module 3 to send a signal to drive the ultrasonic transducer array module 1 to transmit ultrasonic waves; the ultrasonic signal propagates in the fresh concrete in the container, drives the ultrasonic transducer array module 1 to receive the ultrasonic signal, and transmits the signal to the signal conditioning module 4; the signal conditioning module 4 amplifies and filters the received ultrasonic signal, and transmits the processing results to the single-chip computer module 5; the single-chip computer module 5 transmits the processing results to the display device 6.

[0071] The ultrasonic transducer array module 1 is composed of a plurality of ultrasonic piezoelectric probes arranged in an array. The ultrasonic piezoelectric probes include two types: single-transmitter and single-receiver probes and integrated transceiver probes. The frequency range of the ultrasonic transducer is 100-800KHz.

[0072] Example 3: Reference Figure 3 This embodiment describes a concrete uniformity detection system for a mixing station container based on an ultrasonic array. The parts that are the same as those in the second embodiment are not repeated here. The ultrasonic transducer array module 1 is composed of a plurality of insertable water-immersed ultrasonic transmitting and receiving probes. Figure 3 This is a diagram illustrating the installation of an insertable immersion ultrasonic probe array. Three groups of ultrasonic transmitting probes are installed on each layer, for a total of three layers. The first layer is 1.1, 1.2, and 1.3; the second layer is 1.4, 1.5, and 1.6; and the third layer is 1.7, 1.8, and 1.9. Three groups of ultrasonic receiving probes are installed on each layer, for a total of three layers. The first layer is 2.1, 2.2, and 2.3; the second layer is 2.4, 2.5, and 2.6; and the third layer is 2.7, 2.8, and 2.9. Ultrasonic detection obtains a real-time detection value of concrete uniformity by calculating the average density detection value of the three layers, thereby determining whether the concrete mixture is uniform. This embodiment of the receiving probe is suitable for concrete containers 7 that are not transparent to ultrasonic signals, such as large thick foam containers. In this case, the ultrasonic probe needs to be fixed on the container wall to detect the concrete uniformity value by a contact method.

[0073] Example 4: Reference Figure 4 This embodiment describes a concrete uniformity detection system for a mixing station container based on an ultrasonic array. The parts that are the same as those in the second embodiment are not repeated here. The ultrasonic transducer array module 1 is composed of a plurality of outer wall flat ultrasonic transmitting and receiving probes. Figure 4 The figure shows the installation method of the outer wall flat ultrasonic probe array. Three groups of ultrasonic transmitting probes are installed on each layer, for a total of three layers. The first layer is 3.1, 3.2, and 3.3; the second layer is 3.4, 3.5, and 3.6; and the third layer is 3.7, 3.8, and 3.9. Three groups of ultrasonic receiving probes are installed on each layer, for a total of three layers. The first layer is 4.1, 4.2, and 4.3; the second layer is 4.4, 4.5, and 4.6; and the third layer is 4.7, 4.8, and 4.9. The ultrasound obtains the real-time detection value of the uniformity of the concrete by obtaining the average density detection value of the three layers, thereby judging whether the concrete mixture is uniform. This embodiment is suitable for concrete containers 7 that can be penetrated by ultrasonic signals, such as concrete containers made of iron or steel, because all ultrasonic probes are attached to the outer wall of the container. This embodiment can be used as a portable uniformity detection device or as a fixed uniformity detection device.

[0074] Example 5: Reference Figure 5 This embodiment describes a concrete uniformity detection system for a mixing station container based on an ultrasonic array. The parts that are the same as those in the second embodiment are not repeated here. The ultrasonic transducer array module 1 is composed of a plurality of contact-type immersion ultrasonic transceiver probes arranged in an array. Figure 5 This is a diagram showing the installation method of the contact immersion ultrasonic probe array. Three groups of ultrasonic transmitting probes are installed on each layer, for a total of three layers. The first layer is 5.1, 5.2, and 5.3; the second layer is 5.4, 5.5, and 5.6; and the third layer is 5.7, 5.8, and 5.9. Three groups of ultrasonic receiving probes are installed on each layer, for a total of three layers. The first layer is 6.1, 6.2, and 6.3; the second layer is 6.4, 6.5, and 6.6; and the third layer is 6.7, 6.8, and 6.9. Ultrasonic detection is performed by obtaining the average density value of the three layers. , and obtain a real-time detection value of concrete uniformity, thereby judging whether the concrete mixture is uniform; this embodiment has no requirements for the material of the concrete container 7 and is suitable for portable detection of concrete uniformity in containers with smaller diameters. The ultrasonic detection device is inserted into the concrete in the container in the shape of an inverted funnel to read the real-time concrete density parameter and uniformity value. When it is detected that the concrete mixture is uniform, the portable ultrasonic device is pulled out, and the uniformity detection process is completed; the portable uniformity detection device is rinsed with water to clean it and wait for the next use.

[0075] Example 6: Reference Figure 6This embodiment describes a concrete uniformity detection system for a mixing station container based on an ultrasonic array. The parts that are the same as those in the second embodiment are not repeated here. The ultrasonic transducer array module 1 is composed of a plurality of contact-type water-immersion ultrasonic transmitting and receiving probes. Figure 6 This figure illustrates the installation of a contact immersion ultrasonic probe array. Three ultrasonic probes are installed in each layer, for a total of three layers: the first layer is 7.1, 7.2, and 7.7; the second layer is 7.3, 7.5, and 7.6; and the third layer is 7.7, 7.8, and 7.9. The probes in this embodiment are all integrated transceivers. Ultrasonic measurements are taken by calculating the average density of the three layers to obtain a real-time concrete uniformity value, thereby determining whether the concrete mixture is uniform. This embodiment has no requirements for the material of the concrete container 7 and is suitable for portable concrete uniformity testing in containers with larger diameters or volumes. Ultrasonic testing is performed by installing an integrated transceiver ultrasonic probe array within an arc-shaped device of a certain length. When the device detects that the concrete mixture is uniform, the portable ultrasonic device is withdrawn, and the uniformity testing process ends. The portable uniformity detection device is rinsed with water to clean it and then ready for use again.

[0076] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A method for detecting the uniformity of concrete in a mixing station container based on an ultrasonic array, characterized in that: The following steps are involved: S1. The control module controls the drive module to send a signal to drive the ultrasonic probe to emit ultrasonic waves; S2. The receiving probe receives the ultrasonic signal transmitted by the fresh concrete in the container; S3 signal conditioning module amplifies and filters the received ultrasonic signal; S4 control module receives the signal conditioning module output signal sampling, calculates the ultrasonic transmission time within a fixed distance in the concrete; S5. Calculate the linear density of fresh concrete according to the ultrasonic transmission time obtained in step S4; S6. Calculate the surface density of the concrete based on the linear density of the fresh concrete obtained in step S5; S7. Calculate the uniformity of fresh concrete according to the surface density of the concrete obtained in step S6; S8 according to the uniformity of the concrete obtained in step S7 U, determine the uniformity of the concrete mixture, if U = 0, the mixer stops mixing, the detection process ends; if the U value is not equal to 0, the mixer works, wait for the next uniformity test; The calculation process of step S5 for calculating the linear density is as follows: The relationship between the propagation speed of ultrasound and the density and volume compression coefficient of the medium is: （1） In formula (1), c is the propagation speed of ultrasonic waves in concrete mixture, ρ is the density of concrete, k is the volume compression coefficient of fresh concrete; The relationship between the propagation speed and propagation time of ultrasound is: （2） In formula (2), d is the propagation distance of ultrasonic waves in concrete mixture, t is the propagation time of ultrasonic waves in concrete; From equations (1) and (2), the linear density of fresh concrete measured by the first ultrasonic channel is: （3） In formula (3), ρ 11 The linear density of fresh concrete measured by the first channel of the first layer in the ultrasonic array module; The calculation method of the linear density of other sound channels on the same layer of fresh concrete is the same as formula (3); The calculation process of step S6 for calculating the surface density of concrete is as follows: （4） In formula (4), ρ 1 is the surface density of the first layer in the ultrasound array module, n is the number of ultrasound probes on the first layer of the ultrasound array; The calculation method of the surface density of other layers of the fresh concrete is the same as formula (4); The calculation process of step S7 for calculating the uniformity of fresh concrete is as follows: （5） In the formula , is the average density of each layer of the ultrasound array, is the theoretical density of fresh concrete, m is the number of concrete layers detected by the ultrasonic array.

2. A concrete uniformity detection system for a mixing station container based on an ultrasonic array, used to implement the concrete uniformity detection method for a mixing station container based on an ultrasonic array according to claim 1, characterized in that: The ultrasonic transducer array module (1), a driving module (3), a signal conditioning module (4), a power supply module (2), a single-chip microcomputer module (5) and a display module (6); wherein the ultrasonic transducer array module (1) is connected to the signal conditioning module (4), the signal conditioning module (4) is connected to the single-chip microcomputer module (5), the single-chip microcomputer module (5) is connected to the display module (6), the power supply module (2) and the driving module (3), and the power supply module (2) is respectively connected to the ultrasonic transducer array module (1), the signal conditioning module (4), the single-chip microcomputer module (5) and the driving module (3).

3. The system according to claim 2, characterized in that The ultrasonic transducer array module (1) is composed of a plurality of ultrasonic piezoelectric probes arranged in an array, wherein the ultrasonic piezoelectric probes include a single-transmitter-receiver probe and a transceiver-integrated probe; the frequency range of the ultrasonic transducer is 100-800 KHz.

4. The system according to claim 3, characterized in that The ultrasonic transducer array module (1) is composed of a plurality of inserted water-immersion ultrasonic transmitting and receiving probes arranged in an array.

5. The system according to claim 3, wherein: The ultrasonic transducer array module (1) is composed of a plurality of outer wall flat ultrasonic transmitting and receiving probes arranged in an array.

6. The system according to claim 3, wherein: The ultrasonic transducer array module (1) is composed of a plurality of contact-type water-immersion ultrasonic transmitting and receiving probes arranged in an array.

7. The system according to claim 3, wherein: The ultrasonic transducer array module (1) is composed of an arrangement of multiple contact-type water-immersion ultrasonic transceiver probes.

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