Method and device for continuous detection of concrete aggregate temperature on-line

Abstract

The application provides a method and device for continuously detecting the temperature of concrete aggregates online. The first volume of aggregates to be discharged in a residence time period is obtained by calculating the aggregate feeding amount and the aggregate discharging amount calculated in real time. The first height is obtained by calculating the first volume through a preset volume function. The aggregate temperature is obtained by calculating the air cooling outlet energy, the air cooling inlet energy, the first height and the first volume through a preset temperature function in the residence time period. Compared with the method for detecting the aggregate temperature by sampling and online infrared temperature sensor in the prior art, the aggregate feeding amount and the aggregate discharging amount are calculated in real time, and the aggregate stacking height is obtained by calculating through a preset volume function; the air cooling temperature and the air cooling speed are monitored in real time to obtain the air cooling outlet energy and the air cooling inlet energy, and the aggregate temperature is obtained by calculating through a preset temperature function, thereby improving the accuracy of calculating the dynamic position and temperature of aggregates.

Description

Technical Field

[0001] This invention relates to the field of large-volume concrete construction technology, and in particular to a method and apparatus for online continuous detection of concrete aggregate temperature. Background Technology

[0002] Mass concrete generates a large amount of heat of hydration after pouring, causing the internal temperature to rise and then fall. The concrete initially experiences compressive stress, then tensile stress. When the tensile stress exceeds the concrete's tensile strength, the mass concrete will crack. Therefore, it is crucial to strictly control the temperature during concrete production, transportation, and pouring. The production temperature is primarily influenced by the concrete aggregate.

[0003] Currently, aggregate temperature detection in large-volume concrete mainly relies on sampling inspection or online infrared temperature sensors. Sampling inspection involves periodically collecting samples from silos or conveyor belts for temperature measurement. The number of samples directly affects the comprehensiveness and accuracy of aggregate temperature detection. Furthermore, manual inspection is significantly affected by subjective factors and the skill level of the inspectors. Infrared temperature sensor detection uses online infrared temperature sensors to detect aggregate temperature. Generally, during air cooling, the surface temperature of aggregates quickly reaches the required level, while the internal temperature is much higher. Online infrared temperature sensors are affected by infrared penetration, often only detecting the surface temperature and failing to detect the internal temperature, resulting in an incomplete reflection of the aggregate temperature.

[0004] Sampling tests and online infrared temperature sensors cannot fully reflect aggregate temperature, resulting in low accuracy. Summary of the Invention

[0005] This invention provides a method and apparatus for online continuous detection of concrete aggregate temperature, which solves the shortcomings of existing technologies that cannot fully reflect aggregate temperature and have low accuracy when detecting aggregate temperature through sampling and online infrared temperature sensors. It achieves improved accuracy in calculating the dynamic position and temperature of aggregate by real-time monitoring of air cooling temperature and air cooling speed.

[0006] This invention provides a method for online continuous detection of concrete aggregate temperature, comprising the following steps:

[0007] The first volume of aggregate to be discharged during the residence time period is calculated based on the aggregate input and output volume obtained in real time. The residence time period is the time period between the current time and the end time of discharge. The aggregate to be discharged is the aggregate discharged during the residence time period. The first volume is the volume of aggregate to be discharged accumulated in the air-cooled aggregate bin during the residence time period.

[0008] The first height is obtained by calculating based on the first volume using a preset volume function; where the first height is the height of the aggregate of the first volume accumulated in the aggregate air-cooling bin.

[0009] During the residence time period, the aggregate temperature is calculated based on the air-cooled outlet energy, air-cooled inlet energy, first height, and first volume using a preset temperature function.

[0010] According to the present invention, a method for online continuous detection of concrete aggregate temperature is provided, which calculates the first volume of aggregate to be discharged during the residence time period based on the real-time calculated aggregate input and output.

[0011] The aggregate feed rate is calculated based on the conveyor belt specifications, the real-time operating speed of the conveyor belt motor, and the dwell time.

[0012] The aggregate discharge volume is obtained by multiplying the cross-sectional area of ​​the discharge port, the aggregate falling speed, and the residence time.

[0013] The first volume of aggregate to be discharged is calculated based on the amount of aggregate entering the silo, the amount of aggregate leaving the silo, and the existing aggregate accumulation volume in the air-cooled aggregate silo.

[0014] According to the present invention, a method for online continuous detection of concrete aggregate temperature is provided, comprising a preset volume function, including a first volume function, wherein a first height is obtained by calculation based on the first volume using the preset volume function, including:

[0015] If the first volume is not less than the volume of the cone, the first height is calculated using the first volume function based on the current aggregate accumulation volume, the second aggregate accumulation volume at the end of unloading, and the height of the inverted platform.

[0016] According to the present invention, a method for online continuous detection of concrete aggregate temperature includes a preset volume function, a second volume function, and a first height calculated based on a first volume using the preset volume function. The method further includes:

[0017] When the first volume is smaller than the volume of the cone, the first height is obtained by calculating based on the cross-sectional area of ​​the inverted truncated cone using the second volume function.

[0018] According to the present invention, a method for online continuous detection of concrete aggregate temperature is provided, which calculates the aggregate temperature based on the air-cooled outlet energy, air-cooled inlet energy, first height, and first volume using a preset temperature function, including:

[0019] Aggregate efficiency is obtained by calculating based on the first height using the efficiency function relationship; where the efficiency function relationship is a function relationship established by fitting through field tests; aggregate efficiency is the energy absorption efficiency of aggregate when the aggregate is piled up to the first height in the air-cooled aggregate bin;

[0020] The energy difference between the air-cooled outlet energy and the air-cooled inlet energy is multiplied by the aggregate falling time period to obtain the energy retention value; where the residence time period includes multiple aggregate falling time periods.

[0021] The aggregate temperature is obtained by calculating based on aggregate efficiency and energy retention value using a preset temperature function.

[0022] The present invention also provides an online continuous temperature detection device for concrete aggregates, comprising the following modules:

[0023] The aggregate volume calculation module is used to calculate the first volume of aggregate to be discharged during the residence time period based on the real-time aggregate input and output. The residence time period is the time period between the current time and the end time of discharge. The aggregate to be discharged is the aggregate discharged during the residence time period. The first volume is the volume of aggregate to be discharged accumulated in the air-cooled aggregate silo during the residence time period.

[0024] The aggregate stacking height calculation module is used to calculate the first height based on the first volume using a preset volume function; wherein, the first height is the height of the first volume of aggregate stacked in the aggregate air-cooled bin;

[0025] The aggregate temperature calculation module is used to calculate the aggregate temperature during the residence time period by using a preset temperature function based on the air-cooled outlet energy, air-cooled inlet energy, first height, and first volume.

[0026] According to the present invention, an online continuous temperature detection device for concrete aggregates and an aggregate volume calculation module are provided, comprising:

[0027] The aggregate loading calculation submodule is used to calculate the aggregate loading amount based on the conveyor belt specifications, the real-time operating speed of the conveyor belt motor, and the dwell time.

[0028] The aggregate discharge volume calculation submodule is used to perform a product operation on the cross-sectional area of ​​the discharge port, the aggregate falling speed and the residence time to obtain the aggregate discharge volume.

[0029] The volume calculation submodule is used to calculate the first volume of the aggregate to be discharged based on the aggregate input volume, aggregate output volume, and the existing aggregate accumulation volume in the air-cooled aggregate bin.

[0030] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the online continuous detection method for concrete aggregate temperature as described above.

[0031] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the online continuous detection method for concrete aggregate temperature as described above.

[0032] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the online continuous detection method for concrete aggregate temperature as described above.

[0033] The present invention provides a method and apparatus for online continuous detection of concrete aggregate temperature. Based on real-time calculated aggregate feed and discharge volumes, a first volume of aggregate to be discharged during the residence time period is obtained. A first height is calculated based on this first volume using a preset volume function. During the residence time period, the aggregate temperature is calculated based on the air-cooled outlet energy, air-cooled inlet energy, the first height, and the first volume using a preset temperature function. Compared to existing methods that detect aggregate temperature through sampling and online infrared temperature sensors, this method improves the accuracy of calculating the dynamic position and temperature of the aggregate by real-time calculation of aggregate feed and discharge volumes, calculating the aggregate stacking height using a preset volume function, and real-time monitoring of air-cooled temperature and velocity to obtain air-cooled outlet and inlet energy, and then calculating the aggregate temperature using a preset temperature function. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic flowchart of the online continuous detection method for concrete aggregate temperature provided by the present invention.

[0036] Figure 2 This is a simulation function graph of aggregate packing volume and packing height provided by the present invention.

[0037] Figure 3 This is a schematic diagram of the aggregate air-cooling structure and instrument installation provided by the present invention.

[0038] Figure 4This is a schematic diagram of the online aggregate temperature measurement principle provided by the present invention.

[0039] Figure 5 This is a schematic diagram of the online continuous temperature detection device for concrete aggregates provided by the present invention.

[0040] Figure 6 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] The following is combined with Figures 1-6 This invention is described.

[0043] Figure 1 This is a schematic flowchart of the online continuous detection method for concrete aggregate temperature provided by the present invention, as shown below. Figure 1 As shown, the method includes the following:

[0044] Step 101: Calculate the first volume of aggregate to be discharged during the residence time period based on the real-time aggregate input and output. The residence time period is the time period between the current time and the end time of discharge. The aggregate to be discharged is the aggregate discharged during the residence time period. The first volume is the volume of aggregate to be discharged accumulated in the air-cooled aggregate silo during the residence time period.

[0045] In step 101 above, the aggregate requiring air cooling is typically transported into the silo by a conveyor belt. Because the specifications of the conveyor belt are fixed during use, and the presence of a scraper below the upper hopper ensures the effective transport cross-sectional area of ​​the aggregate via the conveyor belt. It remains unchanged. The length of the conveyor belt between the upper-level collection hopper and the inlet of the air-cooled silo is constant. That's for sure. By monitoring the motor's operating speed and start / stop times in real time, the volume of aggregate entering the silo can be calculated, i.e., the aggregate loading volume.

[0046] The aggregate discharge mechanism is controlled by a DC24V electric valve installed below the discharge port, which controls a cylinder to drive an arc gate switch, thus opening and closing the discharge bin. Start Time Closing time The discharge time can then be calculated. Cross-sectional area of ​​the discharge port Effective discharge port cross-sectional area Aggregate falling speed The aggregate discharge rate can then be calculated. Additionally, the aggregate inflow rate can also be calculated by monitoring relevant parameters of the upper-level hoppers of the air-cooled feed hopper using this method.

[0047] Optionally, step 101 includes steps A1 to A3:

[0048] Step A1: Calculate the aggregate feed rate based on the conveyor belt specifications, the real-time operating speed of the conveyor belt motor, and the dwell time.

[0049] Step A2: Multiply the cross-sectional area of ​​the discharge port, the aggregate falling speed, and the residence time to obtain the aggregate discharge volume.

[0050] Step A3: Calculate the first volume of aggregate to be discharged based on the aggregate input volume, aggregate output volume, and the existing aggregate accumulation volume in the air-cooled aggregate bin.

[0051] In steps A1 to A3 above, step A1 is achieved through formula (1):

[0052]

[0053] in, This refers to the volume of material entering the warehouse, in m³. The speed of the conveyor belt is expressed in m / s.

[0054] = . This is the start time of the transmission belt operation; The moment when the transmission belt stops running; The conveyor belt running time, in seconds (S). The length of the conveyor belt between the upper-level collection hopper and the inlet of the air-cooled silo. The unit is meters (m). To ensure that no aggregate remains on the conveyor belt, the conveyor belt needs to be displaced by one unit before and after material transport during operation. The length was measured through field testing. The effective transport cross-sectional area of ​​aggregate on the conveyor belt is measured in square meters (m²) through on-site testing.

[0055] The aggregate output in step A2 is achieved through formula (2):

[0056]

[0057] in, This refers to the aggregate output, in m³. The effective discharge port cross-sectional area, in square meters, was measured through on-site testing. The aggregate falling speed is measured in m / s, obtained from field tests. The discharge time is measured in seconds (S), measured by real-time monitoring of the start-up time of the DC24V electric valve. and closing action time The difference.

[0058] Step A3 is achieved through formula (3):

[0059]

[0060] in, This represents the current aggregate volume in the silo, i.e., the first volume. This refers to the amount of aggregate entering the warehouse; This refers to the amount of aggregate discharged from the warehouse. This refers to the volume of aggregate already accumulated in the silo.

[0061] Step 102: Calculate the first height based on the first volume using a preset volume function; where the first height is the height of the aggregate of the first volume accumulated in the aggregate air-cooling chamber.

[0062] Optionally, a preset volume function is provided, including a first volume function, and step 102 includes step B1:

[0063] If the first volume is not less than the volume of the cone, the first height is calculated using the first volume function based on the current aggregate accumulation volume, the second aggregate accumulation volume at the end of unloading, and the height of the inverted platform.

[0064] Optionally, the preset volume function also includes a second volume function, and step 102 further includes step C1:

[0065] When the first volume is smaller than the volume of the cone, the first height is obtained by calculating based on the cross-sectional area of ​​the inverted truncated cone using the second volume function.

[0066] In steps 102, B1, and C1 above, the upper part of the air-cooled aggregate silo is a cuboid, and the lower part is a bucket-shaped inverted pyramidal structure. During the stacking process, the material pile forms a natural cone-shaped pile on top. It is necessary to determine the silo structural parameters and the stacking angle of the naturally stacked silo to calculate the stacking height and volume of the material in the silo.

[0067] Aggregate air-cooled silo tilting platform length ,Width With Taiwan Sports Center The relational functions are shown in formulas (4) and (5):

[0068]

[0069]

[0070] in, , , These represent the top side length, width, and height of the inverted platform, respectively, and are constant values. The maximum side length and width of the inverted platform are also the length and width of the cuboid, both in meters (m), and can be measured on-site. , , This indicates that the maximum planar cross-sectional area of ​​the material during the stacking process is less than [a certain value]. = The length, width, and height of the time are all in meters (m). and These represent the length and width of the discharge port, both in meters (m), measured through on-site testing. Because... and Since it is a dimensionless coefficient, let , Substituting these values ​​into formulas (4) and (5) respectively, we obtain formulas (6) and (7):

[0071]

[0072]

[0073] The height of the aggregate in the cone-shaped stack within the silo The functional relationship between the height of the collapsed body and the following formula:

[0074]

[0075] Substituting formulas (6) and (7) into formula (8) yields formula (9):

[0076]

[0077] make ,get .

[0078] in, The angle of aggregate accumulation in the silo, in degrees, was measured through field tests. It is a dimensionless constant.

[0079] The volume of aggregate during the stacking process With stacking height function

[0080]

[0081] Substituting formulas (6) and (7) into formula (10) yields formula (11):

[0082]

[0083] The height of the pile during aggregate stacking With stacking height The function is shown in formula (12):

[0084]

[0085] in, ; The height of aggregates during their accumulation in the silo, expressed in meters (m).

[0086] The volume function of aggregate during the accumulation process in the silo is shown in formula (13):

[0087]

[0088] in, The horizontal cross-sectional area during aggregate stacking, in square meters (m²).

[0089] Substituting formulas (6), (7), (9), (11), and (12) into formula (13) yields formula (14):

[0090]

[0091] Among them, when hour,

[0092] and If it is a constant in units of m³, then let

[0093] and This can be simplified to formula (15), that is, the preset volume function is expressed by formula (15):

[0094] (15)

[0095] Step A3 can be used to calculate the current aggregate accumulation volume in the silo. Outbound volume The computer calculates the volume of aggregate after each discharge using formula (15). The height of aggregates in the aggregate air-cooling silo The opening and closing times of the silo door are monitored each time, and the average value is calculated by computer. The difference between this average and the previously calculated average is used as the volume of aggregate after the k-th discharge. The aggregate here High dwell time .like Figure 2 As shown, Figure 2This is a simulation function graph of aggregate packing volume and packing height provided by the present invention.

[0096] Step 103: During the residence time period, the aggregate temperature is calculated based on the air-cooled outlet energy, air-cooled inlet energy, first height, and first volume using a preset temperature function.

[0097] In step 103 above, as Figure 3 As shown, Figure 3 This is a schematic diagram of the aggregate air-cooling structure and instrument installation provided by the present invention. Due to differences in silo size, there may be multiple air-cooling units in aggregate air-cooling systems, meaning there are multiple air inlets and outlets. Therefore, the aggregate temperature cannot be calculated based on the temperature difference absorption rate; it must be calculated according to the principle of energy conservation.

[0098] like Figure 4 As shown, Figure 4 This is a schematic diagram of the online aggregate temperature measurement principle provided by the present invention. The air-cooled inlet temperature is monitored in real time by a digital thermometer or resistance thermometer installed at the center of the air outlet. The inlet wind speed is monitored in real time by an impeller anemometer or ultrasonic anemometer installed near the center of the air outlet. air-cooled inlet cross-sectional area As a fixed value, the air-cooled inlet energy can be calculated by measuring it through on-site tests, as shown in formula (16):

[0099]

[0100] in, This represents the total instantaneous energy carried in by the cooling medium at each air inlet at the current moment, expressed in kJ / s. The values ​​are obtained through online real-time monitoring, and the unit is ℃. The result was obtained through online real-time monitoring, with units of m / s. for The measurements were obtained through on-site testing, and the unit is square meters (m²). The density of the air-cooled medium is expressed in kg / m³. Specific heat capacity of the air-cooled medium, in kJ / (kg•℃); Indicates shared ownership One aggregate air-cooled inlet; Indicates the first One aggregate air-cooled inlet.

[0101] The outlet temperature of the air-cooled unit is monitored in real time by a digital thermometer or resistance thermometer installed at the center of the air outlet. The outlet wind speed is monitored in real time by an impeller anemometer or ultrasonic anemometer installed near the center of the air outlet. cross-sectional area of ​​air-cooled outlet Since it is a fixed value, the air-cooled outlet energy can be calculated by measuring it through on-site tests. As shown in formula (17):

[0102]

[0103] in, This represents the total instantaneous energy carried out by the cooling medium at each air outlet at the current moment, expressed in kJ / s. The values ​​are obtained through online real-time monitoring, and the unit is ℃. The result was obtained through online real-time monitoring, with units of m / s. The measurements were obtained through on-site testing, and the unit is square meters (m²). Indicates shared ownership One aggregate air-cooled inlet; Indicates the first One aggregate air-cooled inlet.

[0104] Currently, the aggregate produced is piled up under a shed with sunshade measures. So, what is the temperature of the aggregate before it enters the storage facility? With temperature The relationship is achieved through formula (18):

[0105]

[0106] in, The aggregate temperature upon entering the storage bin is expressed in °C. Ambient temperature, in °C; The dimensionless coefficient of aggregate natural stacking temperature versus air temperature was determined through multiple field tests under different air temperature conditions. coefficient.

[0107] Optionally, step 103 includes steps D1 to D3:

[0108] Step D1: Calculate the aggregate efficiency based on the first height using the efficiency function relationship; where the efficiency function relationship is a function relationship established through field test fitting; the aggregate efficiency is the energy absorption efficiency of the aggregate when the aggregate is piled up to the first height in the air-cooled aggregate bin.

[0109] Step D2: Multiply the difference between the energy at the air-cooled outlet and the energy at the air-cooled inlet by the aggregate falling time period to obtain the energy retention value; where the retention time period includes multiple aggregate falling time periods.

[0110] Step D3: Calculate the aggregate temperature based on aggregate efficiency and energy retention value using a preset temperature function.

[0111] In steps D1 to D3 above, the preset temperature function is achieved through formula (19):

[0112]

[0113] in, For volume The current temperature of the aggregate, in °C; The height of the aggregate in the silo is The efficiency of energy absorption by aggregate is a dimensionless constant, and a functional relationship is established by fitting through field tests. For volume is The first aggregate The next fall; For volume is aggregate total After the next discharge port, the material is discharged from the warehouse; is the coefficient between aggregate bulk volume and effective aggregate volume, which is a dimensionless constant and was measured through field experiments; This represents the density of the aggregate, expressed in kg / m³. is the specific heat capacity of the aggregate, expressed in kJ / (kg•℃).

[0114] This invention provides an online, continuous method for detecting the temperature of concrete aggregates. Based on real-time calculated aggregate feed and discharge volumes, a first volume of aggregate to be discharged during a residence time period is obtained. A first height is calculated using a preset volume function based on this first volume. During the residence time period, the aggregate temperature is calculated using a preset temperature function based on the air-cooled outlet energy, air-cooled inlet energy, the first height, and the first volume. Compared to existing methods that use sampling and online infrared temperature sensors to detect aggregate temperature, this method improves the accuracy of calculating the dynamic position and temperature of aggregates by real-time calculation of aggregate feed and discharge volumes, calculating the aggregate stacking height using a preset volume function, and monitoring air-cooled temperature and velocity in real-time to obtain air-cooled outlet and inlet energy, and then calculating the aggregate temperature using a preset temperature function.

[0115] The following describes the online continuous temperature detection device for concrete aggregates provided by the present invention. The online continuous temperature detection device for concrete aggregates described below can be referred to in correspondence with the online continuous temperature detection method for concrete aggregates described above.

[0116] Figure 5 This is a schematic diagram of the online continuous temperature detection device for concrete aggregates provided by the present invention, as shown below. Figure 5 As shown, the device includes the following:

[0117] The aggregate volume calculation module 501 is used to calculate the first volume of aggregate to be discharged during the residence time period based on the aggregate inflow and outflow quantities obtained in real time. The residence time period is the time period between the current time and the end time of discharge. The aggregate to be discharged is the aggregate discharged during the residence time period. The first volume is the volume of aggregate to be discharged accumulated in the air-cooled aggregate silo during the residence time period.

[0118] The aggregate stacking height calculation module 502 is used to calculate the first height based on the first volume using a preset volume function; wherein the first height is the height of the first volume of aggregate stacked in the aggregate air-cooled bin.

[0119] The aggregate temperature calculation module 503 is used to calculate the aggregate temperature during the residence time period by using a preset temperature function based on the air-cooled outlet energy, air-cooled inlet energy, first height, and first volume.

[0120] Optionally, the aggregate volume calculation module 501 includes:

[0121] The aggregate loading calculation submodule is used to calculate the aggregate loading amount based on the conveyor belt specifications, the real-time operating speed of the conveyor belt motor, and the dwell time.

[0122] The aggregate discharge volume calculation submodule is used to perform a product operation on the cross-sectional area of ​​the discharge port, the aggregate falling speed and the residence time to obtain the aggregate discharge volume.

[0123] The volume calculation submodule is used to calculate the first volume of the aggregate to be discharged based on the aggregate input volume, aggregate output volume, and the existing aggregate accumulation volume in the air-cooled aggregate bin.

[0124] This invention provides an online continuous concrete aggregate temperature detection device. Based on real-time calculated aggregate feed and discharge rates, it calculates the first volume of aggregate to be discharged during a specific residence time. Using a preset volume function, it calculates the first height based on this first volume. During the residence time, it calculates the aggregate temperature using a preset temperature function based on the air-cooled outlet energy, air-cooled inlet energy, the first height, and the first volume. Compared to existing methods that use sampling and online infrared temperature sensors to detect aggregate temperature, this device improves the accuracy of calculating the dynamic position and temperature of the aggregate by real-time calculation of aggregate feed and discharge rates, calculating the aggregate stacking height using a preset volume function, and monitoring air-cooled temperature and velocity in real-time to obtain air-cooled outlet and inlet energy, and then calculating the aggregate temperature using a preset temperature function.

[0125] Figure 6 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 6As shown, the electronic device may include a processor 810, a communications interface 820, a memory 830, and a communication bus 840. The processor 810, communications interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logical instructions from the memory 830 to execute a method for online continuous detection of concrete aggregate temperature.

[0126] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0127] On the other hand, the present invention also provides a computer program product, the computer program product including a computer program that can be stored on a non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the computer is able to execute the online continuous detection method for concrete aggregate temperature provided by the above methods.

[0128] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform the online continuous detection method for concrete aggregate temperature provided by the methods described above.

[0129] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0130] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for online continuous detection of concrete aggregate temperature, characterized in that, include: The first volume of aggregate to be discharged during the residence time period is calculated based on the aggregate input and output volume obtained in real time. The residence time period is the time period between the current time and the end time of discharge. The aggregate to be discharged is the aggregate discharged during the residence time period. The first volume is the volume of aggregate to be discharged accumulated in the air-cooled aggregate silo during the residence time period. The first height is obtained by calculating based on the first volume using a preset volume function; wherein, the first height is the height of the aggregate of the first volume accumulated in the aggregate air-cooling chamber; During the residence time period, the aggregate temperature is calculated using a preset temperature function based on the air-cooled outlet energy, air-cooled inlet energy, the first height, and the first volume. The step of calculating the aggregate temperature using a preset temperature function based on the air-cooled outlet energy, air-cooled inlet energy, the first height, and the first volume includes: Aggregate efficiency is obtained by calculating based on the first height using the efficiency function relationship; wherein, the efficiency function relationship is a function relationship established by fitting through field tests; the aggregate efficiency is the energy absorption efficiency of the aggregate when the aggregate is piled up to the first height in the air-cooled aggregate bin; The difference between the energy at the air-cooled outlet and the energy at the air-cooled inlet is multiplied by the aggregate falling time period to obtain the energy retention value; wherein, the residence time period includes multiple aggregate falling time periods; The aggregate temperature is obtained by calculating based on the aggregate efficiency and the energy retention value using a preset temperature function. The preset temperature function is achieved through the following formula: ； in, For volume The current temperature of the aggregate, in °C; The height of the aggregate in the silo is The energy absorption efficiency of aggregate is a dimensionless constant, and a functional relationship is established through field experiments; K is the volume of aggregate. The aggregate falls for the Kth time; m is the volume of the aggregate. The aggregate was discharged from the silo through the discharge port m times. is the coefficient between aggregate bulk volume and effective aggregate volume, which is a dimensionless constant and was measured through field experiments; This represents the density of the aggregate, expressed in kg / m³. Specific heat capacity of aggregate, in kJ / (kg•℃); The aggregate temperature upon entering the storage bin is expressed in °C. This represents the total instantaneous energy carried in by the cooling medium at each air inlet at the current moment, expressed in kJ / s. This represents the total instantaneous energy carried out by the cooling medium at each air outlet at the current moment, expressed in kJ / s.

2. The method for online continuous detection of concrete aggregate temperature according to claim 1, characterized in that, The calculation, based on the real-time aggregate input and output, yields the first volume of aggregate awaiting discharge during the residence time period, including: The aggregate feed rate is calculated based on the conveyor belt specifications, the real-time operating speed of the conveyor belt motor, and the dwell time. The aggregate discharge volume is obtained by multiplying the cross-sectional area of ​​the discharge port, the aggregate falling speed, and the residence time. The first volume of aggregate to be discharged is calculated based on the aggregate input volume, aggregate output volume, and the existing aggregate accumulation volume in the air-cooled aggregate silo.

3. The method for online continuous detection of concrete aggregate temperature according to claim 1, characterized in that, The preset volume function includes a first volume function, and the step of calculating the first height based on the first volume using the preset volume function includes: If the first volume is not less than the volume of the cone, the first height is calculated using the first volume function based on the first aggregate accumulation volume at the current moment, the second aggregate accumulation volume at the end of the discharge, and the height of the inverted platform.

4. The method for online continuous detection of concrete aggregate temperature according to claim 3, characterized in that, The preset volume function further includes a second volume function, and the step of calculating the first height based on the first volume using the preset volume function further includes: When the first volume is smaller than the volume of the cone, the first height is obtained by calculating based on the cross-sectional area of ​​the inverted platform using the second volume function.

5. A device for continuous online detection of concrete aggregate temperature, characterized in that, include: The aggregate volume calculation module is used to calculate the first volume of aggregate to be discharged during the residence time period based on the aggregate inflow and outflow quantities obtained in real time. The residence time period is the time period between the current time and the end time of discharge. The aggregate to be discharged is the aggregate discharged during the residence time period. The first volume is the volume of aggregate to be discharged accumulated in the air-cooled aggregate silo during the residence time period. The aggregate stacking height calculation module is used to calculate the first height based on the first volume using a preset volume function; wherein, the first height is the height of the first volume of aggregate stacked in the aggregate air-cooling bin; The aggregate temperature calculation module is used to calculate the aggregate temperature during the residence time period by using a preset temperature function based on the air-cooled outlet energy, the air-cooled inlet energy, the first height, and the first volume. The step of calculating the aggregate temperature using a preset temperature function based on the air-cooled outlet energy, air-cooled inlet energy, the first height, and the first volume includes: Aggregate efficiency is obtained by calculating based on the first height using the efficiency function relationship; wherein, the efficiency function relationship is a function relationship established by fitting through field tests; the aggregate efficiency is the energy absorption efficiency of the aggregate when the aggregate is piled up to the first height in the air-cooled aggregate bin; The difference between the energy at the air-cooled outlet and the energy at the air-cooled inlet is multiplied by the aggregate falling time period to obtain the energy retention value; wherein, the residence time period includes multiple aggregate falling time periods; The aggregate temperature is obtained by calculating based on the aggregate efficiency and the energy retention value using a preset temperature function. The preset temperature function is achieved through the following formula: ; in, For volume The current temperature of the aggregate, in °C; The height of the aggregate in the silo is The energy absorption efficiency of aggregate is a dimensionless constant, and a functional relationship is established through field experiments; K is the volume of aggregate. The aggregate falls for the Kth time; m is the volume of the aggregate. The aggregate was discharged from the silo through the discharge port m times. is the coefficient between aggregate bulk volume and effective aggregate volume, which is a dimensionless constant and was measured through field experiments; This represents the density of the aggregate, expressed in kg / m³. Specific heat capacity of aggregate, in kJ / (kg•℃); The aggregate temperature upon entering the storage bin is expressed in °C. This represents the total instantaneous energy carried in by the cooling medium at each air inlet at the current moment, expressed in kJ / s. This represents the total instantaneous energy carried out by the cooling medium at each air outlet at the current moment, expressed in kJ / s.

6. The online continuous temperature detection device for concrete aggregates according to claim 5, characterized in that, The aggregate volume calculation module includes: The aggregate loading calculation submodule is used to calculate the aggregate loading amount based on the conveyor belt specifications, the real-time operating speed of the conveyor belt motor, and the dwell time. The aggregate discharge volume calculation submodule is used to perform a product operation on the cross-sectional area of ​​the discharge port, the aggregate falling speed and the residence time to obtain the aggregate discharge volume. The volume calculation submodule is used to calculate the first volume of the aggregate to be discharged based on the aggregate input amount, the aggregate output amount, and the existing aggregate accumulation volume in the air-cooled aggregate silo.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the method for online continuous detection of concrete aggregate temperature as described in any one of claims 1 to 4.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for online continuous detection of concrete aggregate temperature as described in any one of claims 1 to 4.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for online continuous detection of concrete aggregate temperature as described in any one of claims 1 to 4.

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