Comprehensive judgment and processing method and device for material properties in mixer truck

Abstract

The present application relates to a method and device for comprehensively judging the properties of materials in a mixer truck, and belongs to the technical field of concrete transportation. The method includes receiving data values ​​reflecting the properties of concrete acquired by a sensor in real time, and drawing a corresponding fitting curve; based on the fitting curve, calculating the data average value within a preset time period; matching the data average value with the data value interval in a preset database, and judging whether the data average value matches successfully; if not, turning on the camera through the on-board controller; receiving the current image of the concrete in the mixer drum acquired by the camera, comparing the current image with the standard image in the image database, and obtaining a similarity value; judging whether the similarity value is less than a threshold value; if not, judging that the concrete properties are good, and returning the real-time receiving data value, and drawing the corresponding fitting curve. The present application has the effect of accurately judging the properties of concrete.

Description

Technical Field

[0001] The present application relates to the technical field of concrete transportation, and in particular to a method and device for comprehensively judging and processing the properties of materials in a mixer truck. Background Art

[0002] A mixer truck is a special truck used to transport materials, usually concrete for construction. During transportation, the hydraulic system on the mixer truck drives the drive shaft to rotate, and the drive shaft drives the mixing drum to keep rotating at all times, so that the mixing blades in the mixing drum stir the concrete to ensure that the transported concrete does not solidify.

[0003] However, during the long-term transportation process, the properties of the concrete in the mixing drum will deteriorate. At this time, admixtures are needed. The addition of admixtures during the concrete mixing process can significantly improve the properties of the concrete.

[0004] At present, it is usually necessary for transport personnel to observe the concrete in the mixing drum with their eyes to judge whether the properties of the concrete are good. This not only increases the workload of the transport personnel and reduces the transportation efficiency, but also the judgment result of the concrete properties depends on the subjective judgment of the transport personnel themselves, which makes the judgment result lack objectivity and reduces the accuracy of the judgment result. Summary of the invention

[0005] In order to accurately judge the properties of concrete, the present application provides a method and device for comprehensively judging the properties of materials in a mixer truck.

[0006] In the first aspect, the present application provides a method for comprehensively judging the properties of materials in a mixer truck, which adopts the following technical solution:

[0007] A method for comprehensively judging and processing the properties of materials in a mixer truck, using a sensor to obtain data values ​​reflecting the properties of concrete and sending the data values ​​to a remote control platform through a communication module; using a camera to collect a current image of concrete in a mixing drum and sending the current image to the remote control platform through the communication module; the method is applied to the remote control platform,

[0008] receiving the data value in real time and drawing a corresponding fitting curve;

[0009] Based on the fitting curve, calculating the average value of data within a preset time period;

[0010] Matching the data average with the data value interval in a preset database, and determining whether the data average matches successfully;

[0011] If not, turning on the camera through the vehicle controller;

[0012] Receiving a current image captured by the camera, comparing the current image with a standard image in an image database, and obtaining a similarity value;

[0013] Determine whether the similarity value is less than a threshold;

[0014] If not, it is determined that the concrete properties are good, and the process returns to the step of receiving the data values ​​in real time and drawing a corresponding fitting curve.

[0015] By adopting the above technical solution, the data value obtained by the sensor can reflect the properties of the concrete, that is, the data value changes with the properties of the concrete. Therefore, the data average value is calculated based on the data value actually obtained, and the data average value is matched with the data value interval. If the match is successful, the current image and the standard image are compared, and the similarity value is used to further determine whether the properties of the concrete are good, so that it can automatically and accurately judge whether the properties of the concrete are good.

[0016] Preferably, the data value includes a torque value of a transmission shaft, the fitting curve includes a torque fitting curve, the data average includes a torque average, the preset database includes a torque database, and the data value interval in the torque database is a torque value interval.

[0017] By adopting the above technical solution, the transmission shaft is powered by the hydraulic system to drive the mixing drum to rotate. When the properties of the concrete in the mixing drum change, the torque value required by the transmission shaft also changes accordingly. Therefore, the properties of the concrete can be reflected by the average torque value, and whether the properties of the concrete are good can be determined by matching the average torque value with the torque value range.

[0018] Preferably, the data value also includes the speed value of the transmission shaft, the fitting curve also includes the speed fitting curve, the data average value also includes the speed average value, the preset database includes a speed database, and the data value interval in the speed database is a speed value interval.

[0019] By adopting the above technical solution, when the properties of the concrete in the mixing drum change, the speed value required by the drive shaft also changes accordingly. Therefore, the properties of the concrete can also be reflected by the average speed value. By adding the speed value, the accuracy of determining whether the properties of the concrete are good can be improved.

[0020] Preferably, the data value also includes the pressure value of the stirring blade, the fitting curve also includes the pressure fitting curve, the data average value also includes the pressure average value, the preset database includes a pressure database, and the data value interval in the pressure database is a pressure value interval.

[0021] By adopting the above technical solution, the stirring blade is used to stir concrete. When the properties of the concrete in the mixing drum change, the pressure on the stirring blade also changes accordingly. Therefore, the properties of the concrete can also be reflected by the average pressure value. By adding a pressure value, the accuracy of determining whether the properties of the concrete are good can be further improved.

[0022] Preferably, matching the data average value with a data value interval in a preset database and determining whether the data average value is matched successfully comprises:

[0023] Matching the torque average value with the torque value interval in the torque database;

[0024] Matching the rotation speed average value with the rotation speed value interval in the rotation speed database;

[0025] Matching the pressure average value with the pressure value interval in the pressure database;

[0026] If any one or more of the torque average value, the rotational speed average value and the pressure average value fail to match, it is determined that the data average value fails to match.

[0027] Preferably, each data value interval corresponds to an addition amount value;

[0028] If the torque average value, the rotation speed average value and the pressure average value all match successfully, it is determined that the data average value matches successfully;

[0029] When the data average value is matched successfully or the similarity value is less than a threshold value, the addition amount value corresponding to the successfully matched data value interval is determined as the initial addition amount value, and the admixture addition amount value is obtained according to the initial addition amount value.

[0030] By adopting the above technical solution, only when the torque average value, the speed average value and the pressure average value are successfully matched or the similarity value is less than the threshold, it is determined that the concrete at this time needs to add admixtures, and the addition amount value corresponding to the successfully matched data value interval is used, so that the admixture addition amount can be automatically and accurately determined.

[0031] In the second aspect, the present application provides a device for comprehensively judging and processing the properties of materials in a mixer truck, which adopts the following technical solution:

[0032] A device for comprehensively judging and processing the properties of materials in a mixer truck is applied to the above-mentioned method for comprehensively judging and processing the properties of materials in a mixer truck. The mixer truck includes a mixing drum. The device for comprehensively judging and processing the properties of materials in the mixer truck includes a sensor for obtaining data values ​​reflecting the properties of concrete and a camera for collecting the current image of concrete in the mixing drum. It also includes a communication module, a remote control platform, an image database and a preset database. The camera is connected to a vehicle-mounted controller. The vehicle-mounted controller, the sensor and the camera are all connected to the communication module. The communication module is wirelessly connected to the remote control platform. The image database and the preset database are both connected to the remote control platform.

[0033] By adopting the above technical solution, the data value obtained by the sensor can reflect the properties of the concrete, that is, the data value changes with the properties of the concrete. Therefore, the data average value is calculated based on the data value actually obtained, and the data average value is matched with the data value interval. If the match is successful, the current image and the standard image are compared, and the similarity value is used to further determine whether the properties of the concrete are good, so that it can automatically and accurately judge whether the properties of the concrete are good.

[0034] Preferably, the mixer truck also includes a transmission shaft for driving the mixing drum to rotate, a placement groove is opened on the side wall of the transmission shaft, the sensor includes a torque sensor, the torque sensor is installed in the placement groove, the torque sensor is wirelessly connected to the communication module, the preset database includes a torque database, and the remote control platform is connected to the torque database.

[0035] By adopting the above technical solution, the transmission shaft is powered by the hydraulic system to drive the mixing drum to rotate. When the properties of the concrete in the mixing drum change, the torque value required by the transmission shaft also changes accordingly. Therefore, the properties of the concrete can be reflected by the average torque value, and whether the properties of the concrete are good can be determined by matching the average torque value with the torque value range.

[0036] Preferably, the mixer truck includes a reducer, the transmission shaft is the output shaft of the reducer, a mounting plate is fixedly connected to the reducer, the sensor also includes a speed sensor wirelessly connected to the communication module, the speed sensor is installed on the mounting plate, a gear ring used in conjunction with the speed sensor is fixedly connected to the transmission shaft, the preset database also includes a speed database, and the remote control platform is connected to the speed database.

[0037] By adopting the above technical solution, when the properties of the concrete in the mixing drum change, the speed value required by the drive shaft also changes accordingly. Therefore, the properties of the concrete can also be reflected by the average speed value. By adding the speed value, the accuracy of determining whether the properties of the concrete are good can be improved.

[0038] Preferably, a stirring blade is fixedly connected to the inner wall of the stirring drum, the sensor also includes a pressure sensor, the pressure sensor is installed on the stirring blade, the pressure sensor is wirelessly connected to the communication module, the preset database also includes a pressure database, and the remote control platform is connected to the pressure database.

[0039] By adopting the above technical solution, the stirring blade is used to stir concrete. When the properties of the concrete in the mixing drum change, the pressure on the stirring blade also changes accordingly. Therefore, the properties of the concrete can also be reflected by the average pressure value. By adding a pressure value, the accuracy of determining whether the properties of the concrete are good can be further improved.

[0040] In summary, the present application includes at least one of the following beneficial technical effects:

[0041] 1. The data value obtained by the sensor can reflect the properties of concrete, that is, the data value changes with the properties of concrete. Therefore, the data average value is calculated based on the actual data value, and the data average value is matched with the data value interval. If the match is successful, the current image and the standard image are compared, and the similarity value is used to further determine whether the concrete properties are good, so that the concrete properties can be automatically and accurately judged.

[0042] 2. The drive shaft is powered by a hydraulic system to drive the mixing drum to rotate. When the properties of the concrete in the mixing drum change, the torque value required by the drive shaft also changes accordingly. Therefore, the properties of the concrete can be reflected by the average torque value, and whether the properties of the concrete are good can be determined by matching the average torque value with the torque value range. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a flow chart of a method for comprehensively judging and processing the properties of materials in a mixer truck according to an embodiment of the present application.

[0044] Figure 2 It is another flow chart of the method for comprehensive judgment and processing of material properties in a mixer truck according to an embodiment of the present application.

[0045] Figure 3 It is a structural block diagram of the circuit part of the comprehensive judgment and processing device for material properties in a mixer truck according to an embodiment of the present application.

[0046] Figure 4It is a structural schematic diagram of a device for comprehensively judging and processing the properties of materials in a mixer truck according to an embodiment of the present application.

[0047] Figure 5 yes Figure 4 Enlarged view of part A.

[0048] Figure 6 It is a cross-sectional view of a mixing drum according to an embodiment of the present application.

[0049] Figure 7 It is an exploded diagram of a power supply battery and a pressure sensor according to an embodiment of the present application.

[0050] Explanation of the accompanying drawings: 1. Sensor; 11. Torque sensor; 12. Speed ​​sensor; 13. Pressure sensor; 131. Power cord; 2. Communication module; 3. Remote control platform; 4. Preset database; 41. Torque database; 42. Speed ​​database; 43. Pressure database; 5. Mixing drum; 51. Mixing blade; 52. Open end; 6. Reducer; 61. Drive shaft; 611. Placement groove; 612. Ring gear; 7. Mounting plate; 8. Power supply battery; 9. Protection pipe; 10. Protection cover; 14. First modification module; 15. Second modification module; 16. Camera; 17. Image database; 18. On-board controller; 19. Alarm module; 20. Hopper bracket. DETAILED DESCRIPTION

[0051] The present application is further described in detail below in conjunction with the accompanying drawings.

[0052] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

[0053] This embodiment provides a method for comprehensively judging the properties of materials in a mixer truck, and the method is applied to a remote control platform, such as Figure 1 As shown, the main process of the method is described as follows (steps S101 to S108):

[0054] Step S101: receiving data values ​​in real time and drawing corresponding fitting curves.

[0055] In this embodiment, the data values ​​include the torque value of the transmission shaft, the speed value of the transmission shaft and the pressure value of the mixing blade, and the fitting curve includes the torque fitting curve, the speed fitting curve and the pressure fitting curve. Among them, the transmission shaft is a connecting device between the hydraulic system and the mixing drum on the mixer truck. The hydraulic system, as one of the power sources of the mixer truck, can drive the transmission shaft to rotate, and the transmission shaft drives the mixing drum to rotate; the mixing blade is located inside the mixing drum, and during the rotation of the mixing drum, the mixing blade stirs the concrete in the mixing drum.

[0056] Therefore, the torque value, speed value and pressure value can reflect the properties of the concrete in the mixing drum. For example, when the concrete is relatively viscous, it is relatively difficult to mix the concrete. Correspondingly, the torque value required by the drive shaft is higher, but the speed value will be lower, and the pressure value exerted by the concrete on the mixing blade will increase.

[0057] like Figure 2 As shown, the sensor includes a torque sensor, a rotation speed sensor and a pressure sensor. The torque sensor is used to obtain the torque value of the transmission shaft, the rotation speed sensor is used to obtain the rotation speed value of the transmission shaft, and the pressure sensor is used to obtain the pressure value of the stirring blade.

[0058] The communication module receives the torque value sent by the torque sensor in real time and sends it to the remote control platform. The remote control platform receives the torque value sent by the communication module, fits the torque value using the least square method, and draws the corresponding torque fitting curve; the communication module receives the speed value sent by the speed sensor in real time and sends it to the remote control platform. The remote control platform receives the speed value sent by the communication module, fits the speed value using the least square method, and draws the corresponding speed fitting curve; the communication module receives the pressure value sent by the pressure sensor in real time and sends it to the remote control platform. The remote control platform receives the pressure value sent by the communication module, fits the pressure value using the least square method, and draws the corresponding pressure fitting curve. The X-axis of the fitting curve is time, and the Y-axis is data value.

[0059] It is worth noting that since the data values ​​are acquired in real time, the fitting curve is updated in real time.

[0060] Step S102: Calculate the average value of data within a preset time period based on the fitting curve.

[0061] like Figure 2 As shown, the data average includes the torque average, the speed average and the pressure average. The preset time period can be set to 10 minutes, and the application calculates the data average every 10 minutes.

[0062] Specifically, the definite integral of the torque fitting curve within the preset time period is divided by the interval length of the preset time period, and the result value is the torque average value; the definite integral of the speed fitting curve within the preset time period is divided by the interval length of the preset time period, and the result value is the speed average value; the definite integral of the pressure fitting curve within the preset time period is divided by the interval length of the preset time period, and the result value is the pressure average value.

[0063] Step S103: Match the data average value with the data value interval in the preset database, and determine whether the data average value matches successfully; if so, proceed to step S104; if not, proceed to step S105; wherein each data value interval corresponds to an addition amount value.

[0064] like Figure 2 As shown, the preset database includes a torque database, a rotation speed database and a pressure database. The data value interval in the torque database is a torque value interval, the data value interval in the rotation speed database is a rotation speed value interval, and the data value interval in the pressure database is a pressure value interval.

[0065] The weight of concrete transported by a mixer truck is basically the same each time, but the properties of the concrete will vary. As the transportation time increases, the difference in properties becomes greater. At present, for the same mixer truck, the amount of admixture added is basically constant. When the properties of the concrete vary, too much or too little admixture may be added.

[0066] To solve this problem, in this embodiment, according to historical data and experimental data, an addition value is corresponding to each data value interval. Take the torque database as an example: the torque database stores three torque value intervals: (C, E], (E, G] and (G, I], wherein the addition value corresponding to the torque value interval (C, E] is c, the addition value corresponding to the torque value interval (E, G] is e, and the addition value corresponding to the torque value interval (G, I] is g.

[0067] If the torque average value is K, which does not belong to any torque value interval in the torque database, it means that the torque average value matching fails, and an abnormal signal is output.

[0068] Similarly, when the speed average value fails to match or the pressure average value fails to match, an abnormal signal is also output.

[0069] When any one or more of the torque average value, the speed average value and the pressure average value fail to match, that is, when at least one abnormal signal is received, it indicates that the data average value matching fails, and the process proceeds to step S105.

[0070] If the torque average value is E, which belongs to the torque value interval of (E, G], it means that the torque average value is matched successfully, and a normal signal is output at the same time; similarly, the speed average value is matched with the speed value interval in the speed database. If the match is successful, a normal signal is also output; the pressure average value is matched with the pressure value interval in the pressure database. If the match is successful, a normal signal is also output.

[0071] When the torque average value, the speed average value and the pressure average value are successfully matched, that is, three normal signals are received, it means that the data average value is successfully matched, indicating that the concrete properties at this time are poor and admixtures need to be added, and the process goes to step S104. By matching the three data average values, it is determined that admixtures need to be added to the concrete at this time, which can not only improve the accuracy of judging the concrete properties, but also reduce the possibility of misjudging that admixtures need to be added to the concrete.

[0072] Optionally, of course, the condition for data average value matching failure may also be that the torque average value, the speed average value and the pressure average value all fail to match; the condition for data average value matching success may be that any one or more of the torque average value, the speed average value and the pressure average value match successfully.

[0073] Step S104: determining the addition amount value corresponding to the successfully matched data value interval as the initial addition amount value, and obtaining the admixture addition amount value according to the initial addition amount value.

[0074] like Figure 2 As shown, the initial addition amount value includes a first addition amount value, a second addition amount value and a third addition amount value.

[0075] When the similarity value is less than the threshold value, the additive value corresponding to the torque value interval to which the torque average value belongs is determined as the first additive value, the additive value corresponding to the speed value interval to which the speed average value belongs is determined as the second additive value, and the additive value corresponding to the pressure value interval to which the pressure average value belongs is determined as the third additive value.

[0076] The average of the first addition amount value, the second addition amount value and the third addition amount value is taken as the admixture addition amount value. The data sources for calculating the admixture addition amount value are diversified, so that the admixture addition amount value obtained is more accurate.

[0077] Step S105: Turn on the camera via the vehicle controller.

[0078] In this embodiment, the remote control platform sends instructions to the vehicle-mounted controller through the communication module. After receiving the instructions, the vehicle-mounted controller controls the camera to turn on, and the camera collects the current image of the concrete in the mixing drum.

[0079] Step S106: receiving a current image captured by the camera, comparing the current image with a standard image in an image database, and obtaining a similarity value.

[0080] In this embodiment, the standard image is an image when the concrete properties are good. However, since the mixing drum is in continuous rotation, the concrete in the mixing drum is in dynamic motion. Therefore, there are multiple standard images in the image database, and each standard image can show a different state of the concrete in the mixing drum.

[0081] The cosine similarity algorithm is used to compare the current image with each standard image, and multiple initial similarity values ​​are calculated. Specifically, the current image and the standard image are both grayscaled, and the grayscaled current image and the standard image are scaled to the same size, and the cosine similarity of the scaled current image and the standard image, i.e., the initial similarity value, is calculated.

[0082] The largest initial similarity value among multiple initial similarity values ​​is selected as the similarity value.

[0083] Step S107: Determine whether the similarity value is less than a threshold value, if so, proceed to step S104; if not, proceed to step S108.

[0084] In this embodiment, the similarity value between the current image and the standard image is used to further determine whether an admixture needs to be added to the concrete. When the similarity value is less than a threshold value, it is determined that the concrete properties are poor at this time and an admixture needs to be added, and the process proceeds to step S104.

[0085] Step S108: Determine that the concrete properties are good, turn off the camera through the vehicle controller, and return to step S101.

[0086] In this embodiment, when the similarity value is not less than the threshold, it is determined that the concrete properties are good at this time and no admixture needs to be added, and the camera is automatically turned off by the vehicle controller to save power. Return to step S101, update the fitting curve, and then calculate the data average value of the next preset time period.

[0087] Furthermore, an alarm module is added. When the similarity value is less than the threshold, the alarm module alarms to remind the operator. The operator can also manually control the opening and closing of the camera through the remote control platform. The camera collects concrete images and sends the concrete images to the communication module. The communication module sends the concrete images to the remote control platform. The remote control platform displays the concrete images, which is convenient for the operator to conduct remote monitoring.

[0088] Furthermore, a first modification module is added to modify the addition amount. For example, a more accurate addition amount e+ corresponding to the torque value interval (E, G] is obtained through later experiments, and the original addition amount value e is modified to e+.

[0089] A second modification module is added to modify the data value interval. For example, after later experiments, the torque value interval (C, E] is subdivided into the torque value interval (C, D] and the torque value interval (D, E], the addition amount corresponding to the torque value interval (C, D] is still c, and the addition amount corresponding to the torque value interval (D, E] is determined to be d.

[0090] By continuously updating and improving the preset database through the first modification module and the second modification module, the accuracy of determining whether the concrete properties are good and the accuracy of determining the amount of admixture added can be improved.

[0091] This embodiment also provides a device for comprehensively judging the properties of materials in a mixer truck, which is applied to the method for comprehensively judging the properties of materials in a mixer truck, referring to Figure 3 and Figure 4 The mixer truck includes a mixing drum 5, and the device for comprehensively judging and processing the properties of materials in the mixer truck includes a sensor 1, a communication module 2, a remote control platform 3, a preset database 4, a camera 16, an image database 17, and a vehicle-mounted controller 18. The camera 16 is installed on a hopper bracket 20 of the mixer truck for fixing and supporting the hopper, and the camera 16 faces the open end 52 of the mixing drum 5. The camera 16 is used to collect the current image of the concrete in the mixing drum 5, and the vehicle-mounted controller 18 is used to control the opening and closing of the camera 16. The vehicle-mounted controller 18 can be installed inside the front of the mixer truck, or it can be installed on the body of the mixer truck. The vehicle-mounted controller 18 shown in this embodiment is connected to the camera 16 for communication, and the vehicle-mounted controller 18 is installed on the body of the mixer truck near the front.

[0092] The communication module 2 is installed on the body of the mixer truck near the front of the truck. The sensor 1 and the vehicle controller 18 are connected to the communication module 2, the communication module 2 is connected to the remote control platform 3, and the image database 17 and the preset database 4 are connected to the remote control platform 3 in communication.

[0093] The sensor 1 is used to obtain data values ​​reflecting the properties of concrete; the preset database 4 is used to store data value intervals, and according to historical data and experimental data, each data value interval corresponds to an addition amount value.

[0094] The sensor 1 sends the acquired data value to the communication module 2, and the communication module 2 remotely sends the received data value to the remote control platform 3. The remote control platform 3 receives the data value in real time and draws the corresponding fitting curve; based on the fitting curve, the data average value within the preset time period is calculated, the data average value is matched with multiple data value intervals in the preset database 4, and it is determined whether the data average value is successfully matched; if not, the remote control platform 3 controls the camera 16 to turn on through the vehicle controller 18, and uses the current image collected by the camera 16 to further confirm whether the concrete properties are good. If so, it is determined that the concrete properties are poor and admixtures need to be added, and the addition amount value corresponding to the successfully matched data value interval is determined as the initial addition amount value, and the admixture addition amount value is obtained according to the initial addition amount value.

[0095] Specifically, refer to Figure 4 and Figure 5 The mixer truck includes a reducer 6, which is powered by a hydraulic system of the mixer truck. A transmission shaft 61 is an output shaft of the reducer 6, which is coaxially arranged with the mixer drum 5, and is flange-connected with an end face of the mixer drum 5 facing the front of the mixer truck.

[0096] The hydraulic system drives the transmission shaft 61 of the reducer 6 to rotate, and the transmission shaft 61 drives the mixing drum 5 to rotate. When the properties of the concrete in the mixing drum 5 change, the torque value and the speed value of the mixing drum 5 driven by the transmission shaft 61 also change accordingly. For example, when the concrete is relatively viscous, it is relatively laborious to mix the concrete. Accordingly, the torque value required by the transmission shaft 61 is higher, but the speed value will be reduced. Therefore, the properties of the concrete can be reflected by the torque value and the speed value, which is convenient for determining the properties of the concrete.

[0097] Reference Figure 3 and Figure 5 In this embodiment, the data value includes a torque value, and the sensor 1 includes a torque sensor 11 for collecting the torque value of the transmission shaft 61. The torque sensor 11 can be a sensor that does not require an external power supply. A placement groove 611 is provided on the side wall of the transmission shaft 61, and the torque sensor 11 is installed in the placement groove 611, and the transmitting end of the torque sensor 11 is connected to the communication module 2 for communication.

[0098] Reference Figure 3 , the fitting curve includes a torque fitting curve, and the data average includes a torque average. The torque sensor 11 sends the collected torque value to the remote control platform 3 through the communication module 2. The remote control platform 3 uses the least squares method to fit the torque value and draws the corresponding torque fitting curve. The definite integral of the torque fitting curve within the preset time period is divided by the interval length of the preset time period, and the result value is the torque average. Among them, the preset time period can be set to 10 minutes, and the present application calculates the data average every 10 minutes.

[0099] In this embodiment, the preset database 4 includes a torque database 41, and the data value interval in the torque database 41 is a torque value interval. The remote control platform 3 is connected to the torque database 41 for communication, matches the torque average value with the torque value interval in the torque database 41, and determines whether the torque average value is successfully matched.

[0100] Specifically, for example, the torque database 41 stores three torque value intervals: (C, E], (E, G], and (G, I], wherein the addition value corresponding to the torque value interval (C, E] is c, the addition value corresponding to the torque value interval (E, G] is e, and the addition value corresponding to the torque value interval (G, I] is g.

[0101] If the torque average value is K, which does not belong to any torque value interval in the torque database 41, it means that the torque average value matching fails.

[0102] If the torque average value is E, which belongs to the torque value interval of (E, G], it means that the torque average value is matched successfully.

[0103] Reference Figure 3 and Figure 5 In this embodiment, the data value also includes a rotational speed value, and the sensor 1 also includes a rotational speed sensor 12 for collecting the rotational speed value of the transmission shaft 61. The rotational speed sensor 12 can be a gear rotational speed sensor 12 that does not require an external power supply. A mounting plate 7 is fixedly connected to the side of the reducer 6 facing the mixing drum 5, and the connection method can be welding. The rotational speed sensor 12 is mounted on the mounting plate 7, and a ring gear 612 used in conjunction with the rotational speed sensor 12 is fixedly connected to the transmission shaft 61. The connection method between the ring gear 612 and the transmission shaft 61 can be welding, and the ring gear 612 and the transmission shaft 61 can also be an integrated structure. The transmitting end of the rotational speed sensor 12 is communicatively connected to the communication module 2.

[0104] Reference Figure 3 , the fitting curve also includes the speed fitting curve, and the data average value also includes the speed average value. The speed sensor 12 sends the collected speed value to the remote control platform 3 through the communication module 2. The remote control platform 3 uses the least square method to fit the speed value and draws the corresponding speed fitting curve. The definite integral of the speed fitting curve in the preset time period is divided by the interval length of the preset time period, and the result value is the speed average value.

[0105] In this embodiment, the preset database 4 also includes a speed database 42, and the data value interval in the speed database 42 is a speed value interval. The remote control platform 3 is connected to the speed database 42 for communication, matches the speed average value with the speed value interval in the speed database 42, and determines whether the speed average value is matched successfully. The specific matching method is the same as the method for determining whether the torque average value is matched successfully in the above-mentioned method, which will not be repeated here.

[0106] Reference Figure 4 and Figure 6 , a stirring blade 51 is fixedly connected to the side wall of the mixing drum 5. During the rotation of the mixing drum 5, the stirring blade 51 stirs the concrete in the mixing drum 5. When the properties of the concrete in the mixing drum 5 change, the pressure exerted by the concrete on the stirring blade 51 also changes. For example, when the concrete is relatively viscous, it is relatively laborious to stir the concrete, and accordingly, the pressure value borne by the stirring blade 51 will increase. Therefore, the properties of the concrete can also be reflected by the pressure value, so as to facilitate the determination of the amount of admixture added.

[0107] Reference Figure 3 and Figure 6 In this embodiment, the data value also includes a pressure value. The sensor 1 also includes a pressure sensor 13 for collecting the pressure value of the stirring blade 51. The pressure sensor 13 is installed on the stirring blade 51, and the transmitting end of the pressure sensor 13 is communicatively connected to the communication module 2.

[0108] Reference Figure 6 and Figure 7 A power supply battery 8 is installed on the outer wall of the mixing drum 5 , and a power line 131 of the pressure sensor 13 is passed through the side wall of the mixing drum 5 and is electrically connected to the power supply battery 8 .

[0109] In order to reduce the damage to the power line 131 caused by the concrete during the mixing process, a protective pipe 9 for protecting the power line 131 is fixedly connected between the inner wall of the mixing drum 5 and the pressure sensor 13, and the power line 131 is located in the protective pipe 9. In order to protect the power supply battery 8, a sealed protective cover 10 is fixedly connected to the outer wall of the mixing drum 5. The protective cover 10 has the functions of dustproof and rainproof. The protective cover 10 can be made of insulating material to reduce the influence of the power supply battery 8 on the power supply of the pressure sensor 13.

[0110] Reference Figure 3 , the fitting curve also includes the pressure fitting curve, and the data average value also includes the pressure average value. The pressure sensor 13 sends the collected pressure value to the remote control platform 3 through the communication module 2. The remote control platform 3 uses the least square method to fit the pressure value and draws the corresponding pressure fitting curve. The definite integral of the pressure fitting curve in the preset time period is divided by the interval length of the preset time period, and the result value is the pressure average value.

[0111] In this embodiment, the preset database 4 also includes a pressure database 43, and the data value interval in the pressure database 43 is a pressure value interval. The remote control platform 3 is connected to the pressure database 43 for communication, matches the pressure average value with the pressure value interval in the pressure database 43, and determines whether the pressure average value is successfully matched. The specific matching method is the same as the method for determining whether the torque average value is successfully matched in the above-mentioned method, and will not be repeated here.

[0112] When the torque average value, speed average value or pressure average value matches successfully, a normal signal is output.

[0113] When the torque average, speed average and pressure average are matched successfully, that is, three normal signals are received, it means that the data average is matched successfully. At this time, the concrete properties are poor and admixtures need to be added. The addition amount value corresponding to the successfully matched data value interval is determined as the initial addition amount value, and the admixture addition amount value is obtained according to the initial addition amount value.

[0114] Specifically, the initial additive value includes a first additive value, a second additive value and a third additive value. The additive value corresponding to the torque value interval to which the torque average value belongs is determined as the first additive value, the additive value corresponding to the speed value interval to which the speed average value belongs is determined as the second additive value, and the additive value corresponding to the pressure value interval to which the pressure average value belongs is determined as the third additive value.

[0115] The average of the first addition amount value, the second addition amount value and the third addition amount value is taken as the admixture addition amount value. The data sources for calculating the admixture addition amount value are diversified, so that the admixture addition amount value obtained is more accurate.

[0116] When the torque average value, speed average value or pressure average value fails to match, an abnormal signal is output.

[0117] When any one or more of the torque average value, the speed average value and the pressure average value fail to match, that is, when at least one abnormal signal is received, it indicates that the data average value matching fails.

[0118] After the data average value matching fails, the remote control platform 3 sends an instruction to the vehicle controller 18 through the communication module 2. After receiving the instruction, the vehicle controller 18 controls the camera 16 to turn on. The camera 16 collects the current image of the concrete in the mixing drum 5 and sends it to the communication module 2. The communication module 2 sends the current image to the remote control platform 3.

[0119] The remote control platform 3 receives the current image, compares the current image with the standard image in the image database 17, and obtains a similarity value. However, since the mixing drum 5 is in continuous rotation, the concrete in the mixing drum 5 is in dynamic motion, so there are multiple standard images in the image database 17, and each standard image can show different states of the concrete in the mixing drum 5.

[0120] The cosine similarity algorithm is used to compare the current image with each standard image, and multiple initial similarity values ​​are calculated. Specifically, the current image and the standard image are both grayscaled, and the grayscaled current image and the standard image are scaled to the same size, and the cosine similarity of the scaled current image and the standard image, i.e., the initial similarity value, is calculated.

[0121] The largest initial similarity value among multiple initial similarity values ​​is selected as the similarity value.

[0122] It is determined whether the similarity value is less than a threshold value. If so, the addition amount value corresponding to the successfully matched data value interval is determined as the initial addition amount value, and the admixture addition amount value is obtained according to the initial addition amount value.

[0123] If not, it is determined that the concrete properties are good at this time and no admixture needs to be added. The camera 16 is automatically turned off by the vehicle controller 18 to save power. Return to the step of receiving the data value in real time on the remote control platform 3 and drawing the corresponding fitting curve, update the fitting curve, and then calculate the data average value for the next preset time period.

[0124] Optionally, of course, the condition for data average value matching failure may also be that the torque average value, the speed average value and the pressure average value all fail to match; the condition for data average value matching success may be that any one or more of the torque average value, the speed average value and the pressure average value match successfully.

[0125] Reference Figure 3 Furthermore, an alarm module 19 is added to communicate with the remote control platform 3. When the similarity value is less than the threshold, the alarm module 19 will sound an alarm to remind the operator. The operator can also manually control the opening and closing of the camera 16 through the remote control platform 3. The camera 16 collects concrete images in real time and sends the concrete images to the communication module 2. The communication module 2 sends the concrete images to the remote control platform 3. The remote control platform 3 displays the concrete images, which is convenient for the operator to monitor remotely.

[0126] Furthermore, a first modification module 14 is added to modify the addition amount. For example, a more accurate addition amount e+ corresponding to the torque value interval (E, G] is obtained through later experiments, and the original addition amount value e is modified to e+.

[0127] A second modification module 15 is added for modifying the data value interval. For example, after later experiments, the torque value interval (C, E] is subdivided into a torque value interval (C, D] and a torque value interval (D, E], and the addition amount corresponding to the torque value interval (C, D] is still c, and the addition amount corresponding to the torque value interval (D, E] is determined to be d.

[0128] By continuously updating and improving the preset database 4 through the first modification module 14 and the second modification module 15, the accuracy of determining whether the concrete properties are good and the accuracy of determining the amount of admixture added can be improved.

[0129] The implementation principle of a device for comprehensively judging and processing the properties of materials in a mixer truck is as follows:

[0130] The torque sensor 11 collects the torque value of the transmission shaft 61 in real time and sends it to the remote control platform 3 through the communication module 2; the remote control platform 3 calculates the torque average value within a preset time period through the torque value; and matches the torque average value with the torque value interval in the torque database 41.

[0131] The speed sensor 12 collects the speed value of the transmission shaft 61 in real time and sends it to the remote control platform 3 through the communication module 2; the remote control platform 3 calculates the average speed value within a preset time period through the speed value; and matches the average speed value with the speed value range in the speed database 42.

[0132] The pressure sensor 13 collects the pressure value of the stirring blade 51 in real time and sends it to the remote control platform 3 through the communication module 2; the remote control platform 3 calculates the pressure average value within a preset time period through the pressure value; and matches the pressure average value with the pressure value interval in the pressure database 43.

[0133] When the torque average value, the speed average value, and the pressure average value are all matched successfully, it means that the concrete properties are poor at this time and admixtures need to be added. The addition value corresponding to the successfully matched data value interval is determined as the initial addition value, thereby obtaining the first addition value, the second addition value, and the third addition value.

[0134] The average value of the first added amount value, the second added amount value, and the third added amount value is taken as the added amount value of the external additive.

[0135] When any one or more of the torque average value, the speed average value and the pressure average value fail to match, the remote control platform 3 controls the camera 16 to turn on through the vehicle controller 18, and the camera 16 sends the current image of the concrete in the mixing drum 5 collected to the remote control platform 3 through the communication module 2.

[0136] The remote control platform 3 compares the current image with the standard image in the image database 17 to obtain a similarity value.

[0137] If the similarity value is less than the threshold, it is determined that the concrete properties at this time are poor and admixtures need to be added.

[0138] If the similarity value is not less than the threshold value, it is determined that the concrete properties are good at this time. The camera 16 is automatically turned off by the vehicle controller 18, and the remote control platform 3 continues to receive the torque value, the speed value and the pressure value, and then calculates the data average value of the next preset time period.

[0139] The various variations and specific examples of the methods provided in the above embodiments are also applicable to the comprehensive judgment and processing device for the properties of materials in a mixer truck of the present embodiment. Through the above detailed description of the comprehensive judgment and processing method for the properties of materials in a mixer truck, those skilled in the art can clearly know the implementation method of the comprehensive judgment and processing device for the properties of materials in a mixer truck of the present embodiment. For the sake of brevity of the specification, it will not be described in detail here.

Claims

1. A method for comprehensively judging the properties of materials in a mixer truck, characterized in that: The sensor is used to obtain data values ​​reflecting the properties of concrete and the data values ​​are sent to a remote control platform through a communication module; the camera is used to collect a current image of concrete in a mixing drum and the current image is sent to the remote control platform through the communication module; the method is applied to the remote control platform, receiving the data value in real time and drawing a corresponding fitting curve; Based on the fitting curve, calculating the average value of data within a preset time period; Matching the data average with the data value interval in a preset database, and determining whether the data average matches successfully; If not, turning on the camera through the vehicle controller; Receiving a current image captured by the camera, comparing the current image with a standard image in an image database, and obtaining a similarity value; Determine whether the similarity value is less than a threshold; If not, it is determined that the concrete properties are good, and the process returns to the step of receiving the data values ​​in real time and drawing a corresponding fitting curve; The mixer truck includes a mixing drum, and the device for comprehensively judging and processing the properties of materials in the mixer truck includes a sensor for obtaining data values ​​reflecting the properties of concrete and a camera for collecting a current image of concrete in the mixing drum, and also includes a communication module, a remote control platform, an image database, and a preset database. The camera is connected to a vehicle-mounted controller, and the vehicle-mounted controller, the sensor, and the camera are all connected to the communication module, and the communication module is wirelessly connected to the remote control platform, and the image database and the preset database are both connected to the remote control platform; The mixer truck also includes a transmission shaft for driving the mixing drum to rotate, a placement groove is opened on the side wall of the transmission shaft, the sensor includes a torque sensor, the torque sensor is installed in the placement groove, the torque sensor is wirelessly connected to the communication module, the preset database includes a torque database, and the remote control platform is connected to the torque database.

2. The method according to claim 1, characterized in that: The data value includes a torque value of a transmission shaft, the fitting curve includes a torque fitting curve, the data average includes a torque average, the preset database includes a torque database, and the data value interval in the torque database is a torque value interval.

3. The method according to claim 2, characterized in that The data value also includes the rotation speed value of the transmission shaft, the fitting curve also includes the rotation speed fitting curve, the data average value also includes the rotation speed average value, the preset database includes the rotation speed database, and the data value interval in the rotation speed database is the rotation speed value interval.

4. The method according to claim 3, characterized in that: The data value also includes the pressure value of the stirring blade, the fitting curve also includes the pressure fitting curve, the data average value also includes the pressure average value, the preset database includes a pressure database, and the data value interval in the pressure database is a pressure value interval.

5. The method according to claim 4, characterized in that The matching of the data average value with the data value interval in the preset database and determining whether the data average value is matched successfully comprises: Matching the torque average value with the torque value interval in the torque database; Matching the rotation speed average value with the rotation speed value interval in the rotation speed database; Matching the pressure average value with the pressure value interval in the pressure database; If any one or more of the torque average value, the rotational speed average value and the pressure average value fail to match, it is determined that the data average value fails to match.

6. The method according to claim 5, characterized in that Each data value interval corresponds to an added amount value; If the torque average value, the rotation speed average value and the pressure average value all match successfully, it is determined that the data average value matches successfully; When the data average value is matched successfully or the similarity value is less than a threshold value, the addition amount value corresponding to the successfully matched data value interval is determined as the initial addition amount value, and the admixture addition amount value is obtained according to the initial addition amount value.

7. A device for comprehensively judging the properties of materials in a mixer truck, applied to the method for comprehensively judging the properties of materials in a mixer truck as claimed in any one of claims 1 to 6, characterized in that: The mixer truck comprises a reducer (6), the transmission shaft (61) being the output shaft of the reducer (6), the reducer (6) being fixedly connected to a mounting plate (7), the sensor (1) further comprising a rotation speed sensor (12) wirelessly connected to the communication module (2), the rotation speed sensor (12) being mounted on the mounting plate (7), the transmission shaft (61) being fixedly connected to a gear ring (612) used in conjunction with the rotation speed sensor (12), the preset database (4) further comprising a rotation speed database (42), and the remote control platform (3) being connected to the rotation speed database (42).

8. The device for comprehensively judging and processing the properties of materials in a mixer truck according to claim 7, characterized in that: A stirring blade (51) is fixedly connected to the inner wall of the stirring drum (5), the sensor (1) further comprises a pressure sensor (13), the pressure sensor (13) is mounted on the stirring blade (51), the pressure sensor (13) is wirelessly connected to the communication module (2), the preset database (4) further comprises a pressure database (43), and the remote control platform (3) is connected to the pressure database (43).

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