Detection system and method for a mixing drum, and a mixing truck

Abstract

The application relates to the technical field of engineering machinery, and discloses a detection system of a stirring drum, which comprises a motor and a control system, the motor is electrically connected with the control system, the motor is used for driving the stirring drum to rotate, and the control system is used for controlling the power-on work and power-off stop work of the motor and judging whether the stirring drum is adhered with material according to the running state parameters of the motor after the motor is powered off; after the control system controls the motor to be powered off for a first set time, the control system starts comparing the size of the running state parameters of the motor and a set threshold value; when the running state parameters of the motor are greater than or equal to the set threshold value, or the running state parameters of the motor are less than the set threshold value and the duration is less than a second set time, the control system determines that the stirring drum is adhered with material. The technical scheme of the application can solve the problem of the self-checking function of the mixer truck without material in the prior art, can clean the tank in time, and improves the construction efficiency. The application also relates to a detection method and a mixer truck.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a testing system and method for a mixing drum, and a mixing truck. Background Technology

[0002] Commonly used concrete mixers are specialized trucks used to transport concrete for construction. These trucks are equipped with cylindrical mixing drums to carry the mixed concrete. During transportation, the mixing drum is kept rotating to prevent the concrete from hardening. After delivery, the inside of the mixing drum is usually rinsed with water (drain cleaning) to prevent hardened concrete from taking up space and reducing the drum's volume.

[0003] The current method of judging the sticky material inside the mixing drum of a concrete mixer truck is usually based on the personal experience of the driver or operator. Only when the weight of a single output is significantly reduced will a flashlight be used to shine into the inner cavity of the mixing drum to check for sticky material. However, by this time, the sticky material inside the mixing drum is already very serious and has been sticky for too long, making it more difficult to clean the drum. Since the concrete mixer truck does not have a self-inspection function to detect the sticky material inside the mixing drum in a timely manner, the output of a single mixing operation is often low, resulting in low construction efficiency. Summary of the Invention

[0004] In view of the above problems, embodiments of the present invention provide a detection system for a mixing drum, which solves the problem of the self-inspection function for non-sticky materials in the prior art of mixer trucks, and can clean the drum in time, improve the mixing output of the mixer truck, and improve construction efficiency.

[0005] According to one aspect of the present invention, a detection system for a stirring drum is provided, comprising a motor and a control system. The motor is electrically connected to the control system. The motor is used to drive the stirring drum to rotate. The control system is used to control the motor to operate when powered on, to stop operating when powered off, and to determine whether there is sticky material adhering inside the stirring drum based on the operating status parameters of the motor after power-off. After the control system controls the motor to be powered off for a first set time, the control system begins to compare the operating status parameters of the motor with the magnitude of a set threshold. When the operating status parameters of the motor are greater than or equal to the set threshold, or when the operating status parameters of the motor are less than the set threshold and the duration is less than a second set time, the control system determines that there is sticky material adhering inside the stirring drum.

[0006] In one optional embodiment, the operating status parameters include the motor speed, and the set threshold includes a first threshold; when the motor speed is greater than or equal to the first threshold, the control system determines that there is sticky material adhering to the mixing drum; when the motor speed is less than the first threshold, the control system determines that there is no sticky material adhering to the mixing drum.

[0007] In one optional embodiment, the operating status parameters include the torque of the motor, and the set threshold includes a second threshold. When the torque of the motor is greater than or equal to the second threshold, it is determined that there is sticky material adhering to the mixing drum; when the torque of the motor is less than the second threshold, the control system determines that there is no sticky material adhering to the mixing drum.

[0008] In one optional approach, the operating status parameters include the motor speed and torque, and the set thresholds include a first threshold and a second threshold. When the motor speed is less than the first threshold and the motor torque is less than the second threshold, and the duration is less than the second set time, the control system determines that there is sticky material adhering inside the mixing drum.

[0009] In one optional embodiment, the control system includes a display and control device and a motor driver, the motor driver being electrically connected to the display and control device and the motor being electrically connected to the motor; the display and control device is used to output control commands to the motor driver and display the operating status parameters and / or judgment results of the motor; the motor driver is used to control the motor to be powered on and off.

[0010] In one alternative embodiment, the detection system of the mixing drum includes a weight sensor electrically connected to the display and control device, the weight sensor being used to collect the weight of the viscous material in the mixing drum.

[0011] According to a second aspect of the present invention, a detection method using the detection system of the above-described stirring drum is provided, comprising: when the motor drives the stirring drum to rotate, controlling the motor to be powered off using the control system; after the motor is powered off for a first set time, the control system begins to compare the operating state parameters of the motor with the magnitude of a set threshold; when the operating state parameters of the motor are greater than or equal to the set threshold, or when the operating state parameters of the motor are less than the set threshold and the duration is less than a second set time, the control system determines that there is sticky material adhering inside the stirring drum.

[0012] In one optional embodiment, the operating state parameters include the motor's rotational speed and torque, and the set thresholds include a first threshold and a second threshold. The control system compares the motor's rotational speed with the first threshold. When the motor's rotational speed is greater than or equal to the first threshold, the control system determines that there is sticky material adhering to the mixing drum; when the motor's rotational speed is less than the first threshold, the control system determines that there is no sticky material adhering to the mixing drum. Alternatively, the control system compares the motor's torque with the second threshold. When the motor's torque is greater than or equal to the second threshold, the control system determines that there is sticky material adhering to the mixing drum; when the motor's torque is less than the second threshold, the control system determines that there is no sticky material adhering to the mixing drum. Alternatively, when the motor's rotational speed is less than the first threshold and the motor's torque is less than the second threshold, and the duration is less than the second set time, the control system determines that there is sticky material adhering to the mixing drum.

[0013] In one alternative approach, the weight of the material inside the mixing drum is acquired by a weight sensor; the weight of the material inside the mixing drum is then displayed by a display and control device.

[0014] According to a third aspect of the present invention, a mixer truck is provided, including the above-described detection system for the mixing drum.

[0015] In this embodiment of the invention, the control system of the mixer truck can control the operating status of the motor. When the control system controls the motor to be powered off, and after a first set time, the control system collects the operating status parameters of the motor and compares the operating status parameters of the motor with the value of the set threshold to determine whether there is any sticky material in the mixing drum, so as to carry out timely cleaning work, avoid the phenomenon of low output of the mixing drum in a single mixing, and improve the efficiency of construction.

[0016] The above description is merely an overview of the technical solutions of the embodiments of the present invention. In order to better understand the technical means of the embodiments of the present invention and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1A partial structural schematic diagram of the detection system for a mixer truck according to a first embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of the control circuit of the detection system of the mixer truck according to the first embodiment of the present invention is shown;

[0020] Figure 3 A schematic diagram of the detection method according to the first embodiment of the present invention is shown;

[0021] Figure 4 A schematic diagram of the control circuit of the detection system of the mixer truck according to the second embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram of the detection method according to the second embodiment of the present invention is shown;

[0023] Explanation of the reference numerals: Display and control unit-11; Motor driver-12; Motor-13; Weight sensor-14; Mixing drum-15.

[0024] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0028] like Figures 1 to 2 As shown, the detection system of the mixer truck includes a motor 13 and a control system. The motor 13 is electrically connected to the control system. The motor 13 is used to drive the mixing drum 15 to rotate. The control system is used to control the power-on operation and power-off stop operation of the motor 13, and to determine whether there is sticky material adhering inside the mixing drum 15 based on the operating status parameters of the motor 13 after power-off. After the control system controls the motor 13 to be powered off for a first set time (T value), the control system starts to compare the operating status parameters of the motor 13 with the set threshold. When the operating status parameters of the motor 13 are greater than or equal to the set threshold, or when the operating status parameters of the motor 13 are less than the set threshold and the duration is less than a second set time (C value), the control system determines that there is sticky material adhering inside the mixing drum 15. Here, "adhering material" refers to the solidified concrete that adheres to the mixing drum 15 and cannot be discharged; "first set time" refers to the time period from when the control system controls the motor 13 to be powered off, also known as the transition time. It can be understood that when there is no adhering material in the mixing drum 15, the motor 13 will stop rotating within the first set time after the power is cut off. The range of the first set time is 5s to 30s. For example, if the first set time is 10s, the control system controls the motor 13 to be powered off, and after 10s, it begins to collect the operating status parameters of the motor 13; "duration time" refers to the time taken for the motor 13 to rotate after the control system controls the motor 13 to be powered off for the first set time; "second set time" refers to the set time that the motor 13 needs to rotate and maintain after the power is cut off and the first set time has elapsed. The range of the second set time is 2s to 10s. In this embodiment, the motor 13 has three operating modes: forward rotation, reverse rotation, and stationary (neutral). During the feeding and transportation process, the motor 13 drives the mixing drum 15 to rotate in the forward direction (forward rotation) for feeding and mixing concrete. During the discharge process, the motor 13 drives the mixing drum 15 to rotate in the reverse direction (reverse rotation).

[0029] In this embodiment of the invention, the control system of the mixer truck can control the operating status of the motor 13. When the control system controls the motor 13 to be powered off, and after a first set time, the control system collects the operating status parameters of the motor 13 and compares the operating status parameters of the motor 13 with the value of the set threshold, thereby determining whether there is any sticky material in the mixing drum 15, so as to carry out cleaning work in time, avoid the phenomenon of low output of the mixing drum 15 in a single mixing, and improve the efficiency of construction.

[0030] The motor 13 includes a torque sensor and a speed sensor. The torque sensor is used to collect the torque of the motor 13, and the speed sensor is used to collect the speed of the motor 13.

[0031] In one alternative embodiment, the control system includes a display and control device 11 and a motor driver 12. The motor driver 12 is electrically connected to the display and control device 11 and to the motor 13. The display and control device 11 is used to output control commands to the motor driver 12 and to display the operating status parameters and / or judgment results of the motor 13. The motor driver 12 is used to control the power supply to and from the motor 13.

[0032] In one alternative embodiment, the display and control device 11 and the motor driver 12 are electrically connected via CAN1 (CAN stands for Controller Area Network, an ISO internationally standardized serial communication protocol). The first data bus is used for data transmission. The display and control device 11 and the motor driver 12 are each electrically connected to a 24V control power supply. The motor driver 12 is electrically connected to the motor 13. The motor driver 12 transmits commands from the display and control device 11 to the motor 13 to control the forward, reverse, and stationary rotation of the motor 13. In this embodiment, the first data bus (CAN1) includes a CAN high line (CANH) and a CAN low line (CANL) for information synchronization, communication, and data transmission. Furthermore, a switch is provided at one end of the positive terminal of the 24V control power supply to control the power supply's on / off state.

[0033] In one alternative configuration, the motor driver 12 is electrically connected to a 600V high-voltage power supply (direct current). The motor driver 12 can convert the 600V direct current to alternating current. The motor driver 12 and the motor 13 are electrically connected via three-phase power, which consists of three alternating potentials with the same frequency, equal amplitude, and phases that differ by 120° from each other.

[0034] The concept of "three-phase electricity" is as follows: When a coil rotates in a magnetic field, the conductor cutting the magnetic lines of force will generate an induced electromotive force. Its variation can be represented by a sine curve. If three coils are taken and their spatial positions are 120 degrees apart, the three coils will still rotate in the magnetic field at the same speed. Three induced electromotive forces with the same frequency will be induced in the coils. Since the three coils are 120 degrees apart in space, the current generated is also a three-phase sinusoidal change, which is called three-phase sinusoidal alternating current.

[0035] In one optional embodiment, the display and control device 11 includes a display screen, a forward rotation button, a reverse rotation button, and a stop button. The display screen is used to display the operating status parameters and judgment results of the motor 13. The forward rotation button is used to issue a forward rotation command, which is transmitted to the motor driver 12 via CAN1. The motor driver 12 then transmits the forward rotation command to the motor 13 to achieve forward rotation of the motor 13. The reverse rotation button is used to issue a reverse rotation command, which is transmitted to the motor driver 12 via CAN1. The motor driver 12 then transmits the reverse rotation command to the motor 13 to achieve reverse rotation of the motor 13. The stop button is used to control the power off of the motor 13. When the stop button is pressed and a first set time has elapsed, the display and control device 11 begins to collect the speed, torque, and duration of the motor 13.

[0036] When there is no sticky material inside the mixing drum 15, the motor 13 will be de-energized after the stop button is pressed, and the motor 13 will stop rotating within a first set time. When there is sticky material inside the mixing drum 15, the motor 13 will be de-energized after the stop button is pressed, and after the first set time, the sticky material inside the mixing drum 15 will cause the mixing drum 15 to generate inertia, which will drive the motor 13 to continue rotating. Therefore, this method is used to determine whether there is sticky material inside the mixing drum 15.

[0037] In one optional approach, the operating status parameters include the rotational speed of motor 13, and the set threshold includes a first threshold (A value). When the rotational speed of motor 13 is greater than or equal to the first threshold, the control system determines that there is sticky material adhering to the mixing drum 15; when the rotational speed of motor 13 is less than the first threshold, the control system determines that there is no sticky material adhering to the mixing drum 15. The first threshold refers to the set value of the rotational speed of motor 13, and the range of the first threshold is 1 rpm / min to 50 rpm / min. For example, if the first set time is 10 seconds and the first threshold is set to 10 rpm / min, after pressing the stop button on the display and control device 11, the rotational speed of motor 13 is collected starting after the first set time of 10 seconds. The display and control device 11 compares the rotational speed of motor 13 with the first threshold. If the rotational speed of motor 13 is greater than or equal to 10 rpm / min, the display and control device 11 determines that there is sticky material adhering to the mixing drum 15, and the display screen shows a relevant prompt indicating that there is sticky material in the mixing drum 15; if the rotational speed of motor 13 is less than 10 rpm / min... If the display and control device 11 determines that there is no sticky material in the mixing drum 15, the display screen will not display or will display a message indicating that there is no sticky material in the mixing drum 15.

[0038] In one alternative approach, the operating status parameters include the torque of the motor 13, and the set threshold includes a second threshold (B value). When the torque of the motor 13 is greater than or equal to the second threshold, it is determined that there is sticky material adhering inside the mixing drum 15; when the torque of the motor 13 is less than the second threshold, the control system determines that there is no sticky material adhering inside the mixing drum 15. The second threshold refers to the set value of the torque of motor 13. The range of the second threshold is 1Nm to 20Nm. For example, if the first set time is 10s and the second threshold is set to 5Nm, after pressing the stop button of the display and control device 11, the torque of motor 13 will be collected after 10s (the first set time). The display and control device 11 compares the torque of motor 13 with the second threshold. If the torque of motor 13 is greater than or equal to 5Nm, the display and control device 11 determines that there is sticky material in the mixing drum 15, and the display screen shows a relevant prompt that there is sticky material in the mixing drum 15. If the torque of motor 13 is less than 5Nm, the display and control device 11 determines that there is no sticky material in the mixing drum 15, and the display screen does not display or displays a prompt that there is no sticky material in the mixing drum 15.

[0039] In one alternative approach, the operating status parameters include the rotational speed and torque of the motor 13, and the set thresholds include a first threshold and a second threshold. When the rotational speed of the motor 13 is less than the first threshold and the torque of the motor 13 is less than the second threshold, and the duration is less than the second set time, the control system determines that there is sticky material adhering inside the mixing drum 15. For example, the first set time is 10 seconds, the second set time is 2 seconds, the first threshold is set to 10 rpm / min, and the second threshold is set to 5 Nm. After pressing the stop button on the display and control device 11, the rotational speed and torque of the motor 13 are collected after 10 seconds (the first set time). The display and control device 11 compares the rotational speed of the motor 13 with the first threshold and compares the torque of the motor 13 with the second threshold. If the torque of the motor 13 is less than 10 rpm / min and less than 5 Nm, but the duration is less than 2 seconds (the second set time), the display and control device 11 determines that there is sticky material in the mixing drum 15, and the display screen shows a relevant prompt that there is sticky material in the mixing drum 15. If the torque of the motor 13 is less than 10 rpm / min and less than 5 Nm, but the duration is greater than 2 seconds, the display and control device 11 determines that there is no sticky material in the mixing drum 15, and the display screen does not display or displays a relevant prompt that there is no sticky material in the mixing drum 15.

[0040] In one alternative approach, the display screen has a pop-up notification that when there is sticky material inside the mixing drum 15, the pop-up will display the message "There is sticky material inside the mixing drum 15, please clean it in time," and the message text is not limited to this.

[0041] The operating parameters of motor 13 are satisfied as follows: First, the speed of motor 13 is greater than the first threshold; second, the torque of motor 13 is greater than the second threshold; third, the speed of motor 13 is less than the first threshold and the torque of motor 13 is less than the second threshold, and the duration is less than the second set time; any one of the above three conditions can be used to determine that there is sticky material adhering inside the mixing drum 15.

[0042] like Figure 3 As shown, this embodiment provides a detection method that utilizes the detection system of the aforementioned stirring tank 15 for detection. The detection method includes:

[0043] When the motor 13 drives the mixing drum 15 to rotate, the control system controls the motor 13 to cut off the power; when the stop button of the display and control device 11 is pressed, the display and control device 11 transmits the power-off command to the motor driver 12, and the motor driver 12 controls the motor 13 to cut off the power.

[0044] After the motor 13 is powered off for a first set time, the control system begins to compare the operating status parameters of the motor 13 with the set threshold. When the operating status parameters of the motor 13 are greater than or equal to the set threshold, or when the operating status parameters of the motor 13 are less than the set threshold and the duration is less than the second set time, the control system determines that there is sticky material adhering inside the mixing drum 15. Specifically, the control system compares the rotational speed of motor 13 with a first threshold. When the rotational speed of motor 13 is greater than or equal to the first threshold, the control system determines that there is sticky material adhering to the mixing drum 15. When the rotational speed of motor 13 is less than the first threshold, the control system determines that there is no sticky material adhering to the mixing drum 15. Alternatively, the control system compares the torque of motor 13 with a second threshold. When the torque of motor 13 is greater than or equal to the second threshold, the control system determines that there is sticky material adhering to the mixing drum 15. When the torque of motor 13 is less than the second threshold, the control system determines that there is no sticky material adhering to the mixing drum 15. Or, when the rotational speed of motor 13 is less than the first threshold and the torque of motor 13 is less than the second threshold, and the duration is less than a second set time, the control system determines that there is sticky material adhering to the mixing drum 15, thereby achieving intelligent judgment.

[0045] The display screen of the control device 11 may or may not display the judgment result; when it is determined that there is sticky material in the mixing drum 15, the display screen will pop up a window and display "There is sticky material inside the mixing drum 15, please clean it in time"; when it is determined that there is no sticky material in the mixing drum 15, the display screen will not display or will display "There is no sticky material in the mixing drum 15".

[0046] Second Embodiment

[0047] The detection system for the stirring drum in this embodiment is structurally similar to that in the first embodiment. The difference is that the detection device for the stirring drum in this embodiment is equipped with a weight sensor.

[0048] like Figure 4 As shown, the detection system of the mixing drum 15 includes a weight sensor 14, which is electrically connected to the display and control device 11. The weight sensor 14 is used to collect the weight of the sticky material in the mixing drum 15. The weight sensor 14 is electrically connected to a 24V control power supply. The weight sensor 14 and the display and control device 11 transmit data via CAN2. When the display and control device 11 determines that there is sticky material inside the mixing drum 15, the weight sensor 14 receives the weight of the sticky material in the mixing drum 15 (the weight of the sticky material collected by the weight sensor 14 has been processed to exclude the actual weight of the mixing drum 15 itself and the material being mixed), and transmits the weight of the sticky material to the display and control device 11 via CAN2, where the weight of the sticky material is displayed on the screen.

[0049] like Figure 5 As shown, this embodiment provides a detection method that utilizes the detection system of the stirring tank 15 in the second embodiment for detection. The detection method includes:

[0050] When the motor 13 drives the mixing drum 15 to rotate, the control system controls the motor 13 to cut off the power; when the stop button of the display and control device 11 is pressed, the display and control device 11 transmits the power-off command to the motor driver 12, and the motor driver 12 controls the motor 13 to cut off the power.

[0051] After the motor 13 is powered off for a first set time, the control system begins to compare the operating status parameters of the motor 13 with the set threshold. When the operating status parameters of the motor 13 are greater than or equal to the set threshold, or when the operating status parameters of the motor 13 are less than the set threshold and the duration is less than the second set time, the control system determines that there is sticky material adhering inside the mixing drum 15. Specifically, the control system compares the rotational speed of motor 13 with a first threshold. When the rotational speed of motor 13 is greater than or equal to the first threshold, the control system determines that there is sticky material adhering to the mixing drum 15. When the rotational speed of motor 13 is less than the first threshold, the control system determines that there is no sticky material adhering to the mixing drum 15. Alternatively, the control system compares the torque of motor 13 with a second threshold. When the torque of motor 13 is greater than or equal to the second threshold, the control system determines that there is sticky material adhering to the mixing drum 15. When the torque of motor 13 is less than the second threshold, the control system determines that there is no sticky material adhering to the mixing drum 15. Or, when the rotational speed of motor 13 is less than the first threshold and the torque of motor 13 is less than the second threshold, and the duration is less than a second set time, the control system determines that there is sticky material adhering to the mixing drum 15, thereby achieving intelligent judgment.

[0052] The weight sensor 14 acquires the weight of the sticky material inside the mixing drum 15; when the control system determines that there is sticky material inside the mixing drum 15, the weight sensor 14 acquires the weight of the sticky material and transmits the acquired weight of the sticky material to the display and control device 11.

[0053] The display screen of the control device 11 may or may not display the judgment result. When it is determined that there is sticky material in the mixing drum 15, the display screen will pop up a window and indicate that there is sticky material in the mixing drum 15 and the weight of the sticky material. When it is determined that there is no sticky material in the mixing drum 15, the display screen will not display or will display "No sticky material in the mixing drum 15".

[0054] The present invention also proposes a mixer truck, which includes the detection system and detection method of the above-mentioned mixing drum 15. The specific structure of the detection system of the mixing drum 15 is as described in the above embodiments. Since the mixer truck adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0055] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A detection system for a stirring tank, characterized in that, The system includes a motor and a control system. The motor is electrically connected to the control system. The motor is used to drive the mixing drum to rotate. The control system is used to control the operation of the motor when it is powered on and when it is powered off, and to determine whether there is any sticky material in the mixing drum based on the operating status parameters of the motor after it is powered off. After the motor is powered off for a first set time, the control system starts to compare the operating status parameters of the motor with the value of a set threshold. The operating status parameters include the motor speed, and the set threshold includes a first threshold; when the motor speed is greater than or equal to the first threshold, the control system determines that there is sticky material adhering inside the mixing drum. Alternatively, the operating status parameters include the torque of the motor, and the set threshold includes a second threshold. When the torque of the motor is greater than or equal to the second threshold, it is determined that there is sticky material adhering inside the mixing drum. Alternatively, the operating status parameters include the motor speed and torque, and the set thresholds include a first threshold and a second threshold. When the motor speed is less than the first threshold and the motor torque is less than the second threshold, and the duration is less than a second set time, the control system determines that there is sticky material adhering inside the mixing drum.

2. The detection system for the stirring tank as described in claim 1, characterized in that, The control system includes a display and control device and a motor driver. The motor driver is electrically connected to the display and control device and to the motor. The display and control device is used to output control commands to the motor driver and display the operating status parameters and / or judgment results of the motor. The motor driver is used to control the power supply to and from the motor.

3. The detection system for the stirring tank as described in claim 2, characterized in that, The detection system of the mixing drum includes a weight sensor, which is electrically connected to the display and control device. The weight sensor is used to collect the weight of the sticky material in the mixing drum.

4. A detection method using the detection system for the stirring tank according to any one of claims 1 to 3, characterized in that, The detection method includes: When the motor drives the stirring drum to rotate, the control system controls the motor to be powered off. After the motor is powered off for a first set time, the control system begins to compare the operating status parameters of the motor with the set threshold. The control system compares the motor speed with the first threshold. When the motor speed is greater than or equal to the first threshold, the control system determines that there is sticky material adhering inside the mixing drum. Alternatively, the control system compares the torque of the motor with the second threshold value, and when the torque of the motor is greater than or equal to the second threshold value, it determines that there is sticky material adhering inside the mixing drum; Alternatively, when the motor speed is less than the first threshold and the motor torque is less than the second threshold, and the duration is less than the second set time, the control system determines that there is sticky material adhering inside the mixing drum.

5. The detection method as described in claim 4, characterized in that, The detection method further includes: Obtain the weight of the material stuck inside the mixing drum as collected by the weight sensor; The display and control device shows the weight of the material inside the mixing drum.

6. A mixer truck, characterized in that, The detection system includes the stirring tank as described in any one of claims 1 to 3.

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