A mixer truck monitoring system, method and mixer truck

Abstract

The embodiment of the application discloses a stirring truck monitoring system, a stirring truck and a stirring truck monitoring method, the system comprising: a double Hall sensor, at least two magnets, a monitoring controller and a temperature sensor; each magnet is uniformly distributed and installed on a stirring tank bolt; the double Hall sensor is arranged on a pre-indicated area of the opposite end surface of the bolt; the double Hall sensor generates a pulse signal along with the rotation of the stirring tank; the monitoring controller determines the rotation direction of the stirring tank according to the pulse signal and the positional relationship between the double Hall sensor and the pre-indicated area; the rotation speed of the stirring tank is determined according to the pulse signal and the number of magnets; the temperature sensor is arranged on a hydraulic motor and is used for acquiring a hydraulic oil temperature signal; the monitoring controller determines the rotation adjustment mode of the stirring tank and state early warning information according to the temperature signal, the rotation speed and the rotation direction, the overall state of the stirring truck can be monitored and early warned in real time, the accuracy of the stirring truck monitoring result is improved, and the stirring truck monitoring cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of engineering vehicle technology, and in particular to a concrete mixer truck monitoring system, method, and concrete mixer truck. Background Technology

[0002] With the booming development of the construction industry, concrete mixer trucks are being used more widely, and the demand for monitoring them is becoming increasingly strong. Whether effective monitoring of mixer trucks can be achieved has become an important factor affecting the management of mixer trucks.

[0003] In existing technologies, the performance indicators of mixer trucks are typically tested and recorded manually on a regular basis. For example, after the mixer truck is driven to transport concrete to a designated location at a specified mixing speed, the concrete quality is randomly checked to determine whether the mixing speed needs to be adjusted. Alternatively, a tank speed monitoring device can be used to monitor the mixer truck.

[0004] However, manually inspecting mixer trucks periodically is costly and lacks real-time accuracy. Using tank speed monitoring devices to monitor mixer trucks relies on a single monitoring element, making it difficult to obtain accurate results. Summary of the Invention

[0005] This invention provides a concrete mixer truck monitoring system, method, and concrete mixer truck, which can realize real-time monitoring and early warning of the overall status of the concrete mixer truck, improve the accuracy of the monitoring results, and reduce the cost of concrete mixer truck monitoring.

[0006] According to one aspect of the present invention, a mixer truck monitoring system is provided, the system comprising:

[0007] The system comprises a dual Hall effect sensor, at least two magnets, a monitoring controller, and a temperature sensor; wherein:

[0008] Each magnet is evenly distributed and installed on the bolts of the mixing tank loaded on the mixer truck; the dual Hall sensor is set on the opposite end face of the bolt, corresponding to the position of the bolt, and installed in the pre-indication area on the opposite end face;

[0009] The dual Hall effect sensor is used to generate pulse signals as the mixing tank rotates, passing through each magnet, and then sends the pulse signals to the monitoring controller.

[0010] The monitoring controller is used to determine the rotation direction of the mixing tank based on the pulse signal and the positional relationship between the dual Hall sensors and the pre-indicated area; and to determine the rotation speed of the mixing tank based on the pulse signal and the number of magnets.

[0011] Temperature sensors are installed on the hydraulic motor of the mixer truck to acquire the temperature signal of the hydraulic oil and send it to the monitoring controller. The monitoring controller is used to determine the rotation adjustment method of the mixing tank and the status warning information of the mixing tank based on the temperature signal, rotation speed and rotation direction.

[0012] Optionally, a dual Hall sensor installation positioning arrow is provided on the opposite end face; the installation positioning arrow divides the opposite end face into two symmetrical installation indication areas; the first Hall sensor of the dual Hall sensor is installed in the left installation indication area and corresponds to the bolt position; the second Hall sensor of the dual Hall sensor is installed in the right installation indication area and corresponds to the bolt position.

[0013] Optionally, the monitoring controller is specifically used to: determine the timing relationship between the first pulse signal and the second pulse signal based on the first pulse signal and the second pulse signal corresponding to the first Hall sensor and the second Hall sensor, respectively; and determine the rotation direction of the mixing tank based on the timing relationship and the installation indication areas where the first Hall sensor and the second Hall sensor are located, respectively.

[0014] Optionally, the monitoring controller is specifically used to: indicate an abnormal operating temperature of the mixing tank and prompt a reduction in the mixing tank's rotation speed when the temperature signal meets the short-term operating temperature condition and the rotation speed is greater than or equal to a first preset speed threshold; when the temperature signal meets the short-term operating temperature condition and the rotation speed is less than the first preset speed threshold; or, when the temperature signal meets the prohibited operating temperature condition, indicate an abnormal operating temperature of the mixing tank and initiate a shutdown inspection; when the temperature signal meets the stable operating temperature condition, the rotation direction is forward, and the rotation speed is greater than or equal to a second preset speed threshold, indicate that the mixing tank is operating normally; when the temperature signal meets the stable operating temperature condition, the rotation direction is forward, and the rotation speed is less than the second preset speed threshold, indicate an abnormal operating speed of the mixing tank and prompt an increase in the mixing tank's rotation speed; when the temperature signal meets the stable operating temperature condition and the rotation direction is reverse, indicate an abnormal operating direction of the mixing tank; wherein, the second preset speed threshold is less than the first preset speed threshold.

[0015] Optionally, the fixed operating temperature condition is that the temperature signal is greater than a first temperature threshold and less than a second temperature threshold; the short-term operating temperature condition is that the temperature signal is greater than or equal to a third temperature threshold and less than or equal to a first temperature threshold; or, the temperature signal is greater than or equal to a second temperature threshold and less than or equal to a fourth temperature threshold; the prohibited operating temperature condition is that the temperature signal is less than a third temperature threshold, or, the temperature signal is greater than a fourth temperature threshold; wherein, the third temperature threshold is less than the first temperature threshold, the first temperature threshold is less than the second temperature threshold, and the second temperature threshold is less than the fourth temperature threshold.

[0016] Optionally, the system may also include: a dual Hall sensor power supply indicator light, and / or, a rotation status indicator light for the mixing tank.

[0017] Optionally, the system also includes: vehicle-mounted connected devices; wherein: the vehicle-mounted connected devices are connected to the monitoring controller and are used to send the rotation adjustment method and status warning information determined by the monitoring controller to the connected platform for display.

[0018] Optional, the system has 4 magnets.

[0019] According to another aspect of the present invention, a mixer truck is provided that is capable of performing the mixer truck monitoring method described in any embodiment of the present invention.

[0020] According to another aspect of the present invention, a method for monitoring a mixer truck is provided, which is applied to the mixer truck monitoring system described in any embodiment of the present invention. The system includes: a dual Hall sensor, at least two magnets, a monitoring controller, and a temperature sensor; each magnet is evenly distributed and installed on the bolts of the mixing tank loaded on the mixer truck; the dual Hall sensor is disposed on the opposite end face of the bolt, corresponding to the position of the bolt, and is installed in a pre-indication area on the opposite end face; the temperature sensor is disposed on the hydraulic motor of the mixer truck.

[0021] As the mixing tank rotates, the dual Hall effect sensors generate pulse signals through each magnet, which are then sent to the monitoring controller.

[0022] The direction of rotation of the mixing tank is determined by the monitoring controller based on the pulse signal and the positional relationship between the dual Hall sensors and the pre-indicated area; and the rotation speed of the mixing tank is determined based on the pulse signal and the number of magnets.

[0023] The temperature signal of the hydraulic oil is acquired by a temperature sensor and sent to the monitoring controller;

[0024] By monitoring the controller, the rotation adjustment method of the mixing tank and the status warning information of the mixing tank are determined based on the temperature signal, rotation speed and rotation direction.

[0025] The technical solution of this invention includes: a dual Hall sensor, at least two magnets, a monitoring controller, and a temperature sensor; wherein: each magnet is evenly distributed and installed on the bolts of the mixing tank loaded on the mixer truck; the dual Hall sensor is set on the opposite end face of the bolt, corresponding to the position of the bolt, and installed in a pre-indication area on the opposite end face; the dual Hall sensor is used to generate pulse signals as the mixing tank rotates, passing through each magnet, and sending the pulse signals to the monitoring controller; the monitoring controller is used to determine the rotation direction of the mixing tank based on the pulse signals and the positional relationship between the dual Hall sensors and the pre-indication area; and to determine the rotation speed of the mixing tank based on the pulse signals and the number of magnets; the temperature sensor is set on the hydraulic motor of the mixer truck to acquire the temperature signal of the hydraulic oil and send it to the monitoring controller; the monitoring controller is used to determine the rotation adjustment method of the mixing tank and the status warning information of the mixing tank based on the temperature signal, rotation speed, and rotation direction, which solves the problem that monitoring the mixing truck only by monitoring the rotation speed of the mixing tank leads to inaccurate monitoring results, and can realize real-time monitoring and warning of the mixing truck, improving the efficiency of mixing truck monitoring and reducing the cost of mixing truck monitoring.

[0026] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a mixer truck monitoring system provided in Embodiment 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of a pre-indicated area provided according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of another concrete mixer truck monitoring system provided according to Embodiment 2 of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a mixer truck according to Embodiment 3 of the present invention;

[0032] Figure 5 This is a flowchart of a concrete mixer truck monitoring method provided according to Embodiment 4 of the present invention. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] Example 1

[0036] Figure 1 This is a schematic diagram of a concrete mixer truck monitoring system according to Embodiment 1 of the present invention. This embodiment is applicable to situations requiring real-time monitoring of concrete mixer trucks. The concrete mixer truck monitoring system can be implemented in hardware and / or software and can be configured within the concrete mixer truck. Figure 1 As shown, the system includes: a dual Hall sensor 101, at least two magnets 102, a monitoring controller 103, and a temperature sensor 104, wherein:

[0037] Each magnet 102 is evenly distributed and installed on the bolts of the mixing tank loaded on the mixer truck; the dual Hall sensor 101 is set on the opposite end face of the bolt, corresponding to the position of the bolt, and is installed in the pre-indication area on the opposite end face.

[0038] In this embodiment, the mixer truck monitoring system can be a system that monitors the mixer truck in real time using a dual Hall sensor 101, at least two magnets 102, a monitoring controller 103, and a temperature sensor 104. The dual Hall sensor 101 can be a device comprising two Hall sensors. The dual Hall sensor 101 can be used to monitor the rotational speed and direction of the mixing tank. The magnets 102 can act as trigger magnetic fields to activate the dual Hall sensor 101. The monitoring controller 103 can be used to receive signals sent by the dual Hall sensor 101 and the temperature sensor 104, and calculate the rotational speed and direction of the mixing tank. The temperature sensor 104 can be used to acquire the temperature of the hydraulic oil and convert the temperature information into a usable output signal. The pre-indication area can be the installation area of ​​the dual Hall sensors.

[0039] For example, assuming there are two magnets 102, the two magnets 102 can be respectively mounted on two bolts symmetrically distributed on the mixing tank. The dual Hall sensor 101 can be disposed on the opposite end face of the two bolts.

[0040] The advantage of this setup is that by monitoring the sequence of pulse signals sent by the two Hall sensors, the rotation direction of the mixing tank can be monitored.

[0041] Compared to using a single magnet, this embodiment uses at least two magnets, allowing the operating status of the mixing tank to be detected when it has rotated at most half a revolution, facilitating timely management of the mixer truck. Secondly, using at least two magnets enables the calculation of the mixing tank's rotation speed when it has rotated at most half a revolution, improving the timeliness of mixer truck monitoring. The magnets are evenly distributed and installed on the bolts of the mixing tank, facilitating subsequent calculation of the tank's rotation speed.

[0042] Figure 2 This is a schematic diagram of a pre-indicated area provided according to an embodiment of the present invention.

[0043] In one optional implementation of this embodiment, such as Figure 2 As shown, a dual Hall sensor 101 installation positioning mark arrow 201 is provided on the opposite end face; the installation positioning mark arrow divides the opposite end face into two symmetrical installation indication areas; the first Hall sensor of the dual Hall sensor 101 is installed in the left installation indication area 202 and corresponds to the bolt position; the second Hall sensor of the dual Hall sensor 101 is installed in the right installation indication area 203 and corresponds to the bolt position.

[0044] In this embodiment, the installation positioning arrow can be used to indicate the installation position of the dual Hall sensor 101. Optionally, the installation positioning arrow can be kept facing upwards when installing the dual Hall sensor 101.

[0045] Specifically, the pre-indication area can be divided into a left-side installation indication area 202 and a right-side installation indication area 203 by installing positioning marker arrows 201. Then, the first Hall sensor and the second Hall sensor are respectively installed in the left-side installation indication area 202 and the right-side installation indication area 203. Both the first Hall sensor and the second Hall sensor can emit pulse signals under the action of a magnetic field.

[0046] The dual Hall sensor 101 is used to generate pulse signals as the mixing tank rotates, passing through each magnet 102, and then sending the pulse signals to the monitoring controller 103.

[0047] Specifically, as the mixing tank rotates, the distance between the dual Hall sensor 101 and a magnet 102 gradually decreases. When the dual Hall sensor 101 passes the magnet 102, it emits a pulse signal. Then, as the mixing tank continues to rotate, the dual Hall sensor 101 sequentially passes each magnet 102 mounted on the bolt, emitting pulse signals each time. Since the mixing tank generally moves in a circular motion, the dual Hall sensor 101 can repeatedly pass each magnet 102.

[0048] The monitoring controller 103 is used to determine the rotation direction of the mixing tank based on the pulse signal and the positional relationship between the dual Hall sensor 101 and the pre-indicated area; and to determine the rotation speed of the mixing tank based on the pulse signal and the number of magnets 102.

[0049] In this embodiment, the positional relationship between the dual Hall sensor 101 and the pre-indication area can be varied. For example, the two Hall sensors in the dual Hall sensor 101 can be installed symmetrically vertically in the pre-indication area; or, the two Hall sensors in the dual Hall sensor 101 can be installed symmetrically horizontally in the pre-indication area.

[0050] Specifically, the positional relationship between the dual Hall sensor 101 and the pre-indicated area can be determined first. Then, the rotation direction of the mixing tank can be determined based on the order of pulse signals received by the monitoring controller 103 or the strength of pulse signals received at the same time.

[0051] Since the dual Hall sensor 101 emits a pulse signal when it passes the magnet 102, the rotational speed of the mixing tank can be calculated based on the time interval between the pulse signals and the number of revolutions of the mixing tank.

[0052] For example, suppose there are four magnets 102, symmetrically arranged on the bolts of the mixing tank, and these four magnets 102 are named magnet A, magnet B, magnet C, and magnet D, respectively. As the mixing tank rotates, the dual Hall sensor 101 can send a pulse signal M1 when it passes magnet A and a pulse signal M2 when it passes magnet B. The monitoring controller 103 can record the time when the pulse signals M1 and M2 are received. During the process of the dual Hall sensor 101 passing magnet A and magnet B, the mixing tank rotates one-quarter of a revolution. The monitoring controller 103 can calculate the rotational speed of the mixing tank by dividing the one-quarter revolution of the mixing tank rotation by the time interval between pulse signals M1 and M2.

[0053] Because the mixing tank has four magnetic poles around its circumference, it can be determined that the tank has started rotating when it has completed a quarter turn. Compared to a single magnetic pole, this solution can more quickly identify abnormal situations such as unloading or tank shutdown, providing early warning. Since it uses dual Hall effect sensors, the direction of rotation can be determined by the sequence of pulse signals from the two sensors. Furthermore, compared to placing more magnets on the mixing tank itself, installing four magnets on the bolts of the mixing tank reduces the monitoring cost of the mixer truck, and the four magnets meet the current efficiency requirements for monitoring the operating status of the mixing tank.

[0054] In an optional embodiment of this example, the monitoring controller 103 is specifically used to: determine the timing relationship between the first pulse signal and the second pulse signal based on the first pulse signal and the second pulse signal corresponding to the first Hall sensor and the second Hall sensor, respectively; and determine the rotation direction of the mixing tank based on the timing relationship and the installation indication areas where the first Hall sensor and the second Hall sensor are located, respectively.

[0055] For example, with the first Hall sensor installed in the left mounting indication area 202 and the second Hall sensor installed in the right mounting indication area 203, if the monitoring controller 103 receives the first pulse signal first, it can be assumed that the mixing tank is currently rotating from left to right. Alternatively, if the monitoring controller 103 receives the second pulse signal first, it can be assumed that the mixing tank is currently rotating from right to left. Or, if the monitoring controller 103 receives neither the pulse signal from the first Hall sensor nor the pulse signal from the second Hall sensor after a period of time, it can be assumed that the mixing tank is not rotating. This period of time can be obtained by dividing the time it takes for the mixing tank to rotate one revolution by the number of magnets. For example, if the time it takes for the mixing tank to rotate one revolution is 4 minutes and the number of magnets is 4, then the period of time used to determine whether the mixing tank is rotating can be calculated to be 1 minute.

[0056] The advantage of this setup is that, since unloading often occurs when the mixing tank rotates from right to left, real-time monitoring of the mixing tank's rotation direction allows for timely detection of abnormal situations such as unloading or the mixing tank stopping rotating.

[0057] Temperature sensor 104 is installed on the hydraulic motor of the mixer truck to acquire the temperature signal of the hydraulic oil and send it to the monitoring controller 103.

[0058] In this embodiment, the temperature sensor 104 can acquire the temperature signal of the hydraulic oil based on the principle of power-type thermistor (NTC) resistance temperature measurement. The NCT resistance temperature measurement principle means that the resistance value of the temperature sensor 104 changes with the temperature of the hydraulic oil. For example, when the temperature of the hydraulic oil increases, the resistance value of the temperature sensor 104 will also increase.

[0059] Specifically, the temperature sensor 104 can be installed on the pipeline or body of the hydraulic motor. The temperature sensor 104 can convert the resistance value into a temperature signal through its internal circuitry and send it to the monitoring controller 103.

[0060] The advantage of this setup is that, according to the NCT resistance temperature measurement principle, the resistance value changes significantly with the change of hydraulic oil temperature. Therefore, the mixer truck monitoring system using a temperature sensor is more sensitive to temperature changes.

[0061] The monitoring controller 103 is used to determine the rotation adjustment method of the mixing tank and the status warning information of the mixing tank based on the temperature signal, rotation speed and rotation direction.

[0062] In this embodiment, the rotation adjustment method of the mixing tank may include changing the rotation direction of the mixing tank and adjusting the rotation speed of the mixing tank. Adjusting the rotation speed of the mixing tank may involve increasing or decreasing the rotation speed. The status warning information of the mixing tank may include abnormal operating temperature, abnormal rotation speed, and abnormal rotation direction. Abnormal operating temperature may be due to excessively high or low hydraulic oil temperature. Abnormal rotation speed may be due to the mixing tank rotating too fast or too slow.

[0063] Specifically, it can prompt adjustments to the mixing tank's rotation speed based on the current temperature signal and rotation speed. It can also provide early warnings of abnormal mixing tank rotation direction based on the current temperature signal and rotation direction.

[0064] The technical solution of this embodiment includes: a dual Hall sensor, at least two magnets, a monitoring controller, and a temperature sensor; wherein: each magnet is evenly distributed and installed on the bolts of the mixing tank loaded on the mixer truck; the dual Hall sensor is set on the opposite end face of the bolt, corresponding to the position of the bolt, and installed in a pre-indication area on the opposite end face; the dual Hall sensor is used to generate pulse signals as the mixing tank rotates, passing through each magnet, and sends the pulse signals to the monitoring controller; the monitoring controller is used to determine the rotation direction of the mixing tank based on the pulse signals and the positional relationship between the dual Hall sensors and the pre-indication area; and to determine the rotation speed of the mixing tank based on the pulse signals and the number of magnets; the temperature sensor is set on the hydraulic motor of the mixer truck to obtain the temperature signal of the hydraulic oil and send it to the monitoring controller; the monitoring controller is used to determine the rotation adjustment method of the mixing tank and the status warning information of the mixing tank based on the temperature signal, rotation speed, and rotation direction, which solves the problem that monitoring the mixing tank only by monitoring the rotation speed of the mixing tank leads to inaccurate monitoring results of the mixer truck, and can realize real-time monitoring and warning of the mixer truck, improve the accuracy of the monitoring results of the mixer truck, and reduce the cost of mixer truck monitoring.

[0065] Example 2

[0066] Figure 3 This is a schematic diagram of another concrete mixer truck monitoring system provided according to Embodiment 2 of the present invention. This embodiment is a further refinement and expansion of the above technical solution.

[0067] like Figure 3 As shown, the concrete mixer truck monitoring system disclosed in this embodiment includes: a dual Hall sensor 101, at least two magnets 102, a monitoring controller 103, and a temperature sensor 104; wherein each magnet 102 is evenly distributed and installed on the bolts of the mixing tank loaded on the concrete mixer truck; the dual Hall sensor 101 is disposed on the opposite end face of the bolt, corresponding to the position of the bolt, and is installed in a pre-indication area on the opposite end face; the dual Hall sensor 101 is used to generate pulse signals as the mixing tank rotates, passing through each magnet 102, and send the pulse signals to the monitoring controller 103; the monitoring controller 103 is used to determine the rotation direction of the mixing tank based on the pulse signals and the positional relationship between the dual Hall sensor 101 and the pre-indication area; and to determine the rotation speed of the mixing tank based on the pulse signals and the number of magnets; the temperature sensor 104 is disposed on the hydraulic motor of the concrete mixer truck, used to acquire the temperature signal of the hydraulic oil, and send it to the monitoring controller 103; the monitoring controller 103 is used to determine the rotation adjustment method of the mixing tank and the status warning information of the mixing tank based on the temperature signal, rotation speed, and rotation direction.

[0068] Optionally, the number of magnets is 4.

[0069] Specifically, the four magnets 102 can be evenly distributed and installed on the four bolts of the mixing tank.

[0070] The advantage of this setup is that, compared to using only one magnet, which requires the mixing tank to complete one full rotation to determine its direction and speed, this embodiment can determine the mixing tank's direction and speed after only a quarter of a rotation. Secondly, it allows for faster acquisition of information about whether the mixing tank is rotating, effectively preventing material buildup and theft.

[0071] Optionally, the mixer truck monitoring system also includes: signal indicator lights.

[0072] The indicator light can be used to determine if there is a fault in the power supply, the installation of magnet 102, or the dual Hall sensor 101. For example, if the indicator light does not illuminate after power is applied, it can be assumed that the power supply is faulty. Alternatively, the indicator light can be set to turn off when the dual Hall sensor 101 passes magnet 102. If the indicator light remains on when the dual Hall sensor 101 passes magnet 102, it can be assumed that there is a problem with the installation of magnet 102 or that the dual Hall sensor 101 is faulty. A problem with the installation of magnet 102 could be, for example, an incorrect installation position, resulting in a magnetic field that is insufficient to activate the dual Hall sensor 101.

[0073] In an optional embodiment of the present invention, the monitoring controller 103 is specifically configured to: when the temperature signal meets the short-term operating temperature condition and the rotation speed is greater than or equal to a first preset speed threshold, indicate that the operating temperature of the mixing tank is abnormal and suggest reducing the rotation speed of the mixing tank; when the temperature signal meets the short-term operating temperature condition and the rotation speed is less than the first preset speed threshold; or, when the temperature signal meets the prohibited operating temperature condition, indicate that the operating temperature of the mixing tank is abnormal and perform a shutdown inspection; when the temperature signal meets the stable operating temperature condition, the rotation direction is forward and the rotation speed is greater than or equal to a second preset speed threshold, indicate that the mixing tank is operating normally; when the temperature signal meets the stable operating temperature condition, the rotation direction is forward and the rotation speed is less than the second preset speed threshold, indicate that the operating speed of the mixing tank is abnormal and suggest increasing the rotation speed of the mixing tank; when the temperature signal meets the stable operating temperature condition and the rotation direction is reverse, indicate that the operating direction of the mixing tank is abnormal; wherein, the second preset speed threshold is less than the first preset speed threshold.

[0074] In this embodiment, the short-term operating temperature condition can be the temperature condition under which the mixing tank can operate for a short period of time. Specifically, the duration of short-term operation does not exceed 3 minutes. The prohibited operating temperature condition can be the temperature condition under which the mixer truck must immediately stop operating. The stable operating temperature condition can be defined as the temperature under which the mixer truck can operate stably.

[0075] The advantage of this setup is that by reducing the speed of the mixing tank when the temperature signal meets the short-term operating temperature requirements and stopping the tank for inspection when the temperature signal meets the prohibited operating temperature requirements, the hydraulic oil temperature can be prevented from becoming too high, thus avoiding failure of the material conveying and mixing function. Secondly, since unloading usually occurs when the mixing tank reverses, prompting the tank to reverse can prevent drivers from maliciously stealing materials.

[0076] In an optional embodiment of the present invention, the stable operating temperature condition is that the temperature signal is greater than a first temperature threshold and less than a second temperature threshold; the short-term operating temperature condition is that the temperature signal is greater than or equal to a third temperature threshold and less than or equal to a first temperature threshold; or, the temperature signal is greater than or equal to a second temperature threshold and less than or equal to a fourth temperature threshold; the prohibited operating temperature condition is that the temperature signal is less than a third temperature threshold, or, the temperature signal is greater than a fourth temperature threshold; wherein, the third temperature threshold is less than the first temperature threshold, the first temperature threshold is less than the second temperature threshold, and the second temperature threshold is less than the fourth temperature threshold.

[0077] In this embodiment, the first temperature threshold, the second temperature threshold, the third temperature threshold, and the fourth temperature threshold can be the critical segments for the monitoring controller 103 to send status warning information. For example, when the current temperature equals the first temperature threshold, the monitoring controller 103 can send status warning information.

[0078] For example, the first temperature threshold can be 6 degrees Celsius, the second temperature threshold can be 87 degrees Celsius, the third temperature threshold can be -10 degrees Celsius, and the fourth temperature threshold can be 100 degrees Celsius. The specific values ​​can be adjusted according to the actual situation, and this embodiment does not limit them.

[0079] Another example is that the current hydraulic oil temperature can be obtained through temperature sensor 104. If the current hydraulic oil temperature is within the range of greater than or equal to -10 degrees Celsius and less than or equal to 6 degrees Celsius; or if the current hydraulic oil temperature is within the range of greater than or equal to 87 degrees Celsius and less than or equal to 100 degrees Celsius, it can be considered that the mixer truck can only operate for a short time.

[0080] If the current hydraulic oil temperature is within the range of greater than 6 degrees Celsius and less than 87 degrees Celsius, then the mixer truck can be considered to be able to operate for an extended period of time.

[0081] If the current hydraulic oil temperature is less than -10 degrees Celsius or greater than 100 degrees Celsius, a warning will be issued to prohibit the current mixer truck from operating.

[0082] Based on the above implementation method, the first temperature threshold, second temperature threshold, third temperature threshold, and fourth temperature threshold can have temperature deviation thresholds. Specifically, the temperature deviation threshold can be 5 degrees Celsius or -5 degrees Celsius. For example, the temperature deviation threshold can be set to -5 degrees Celsius. In this case, the third temperature threshold is -15 degrees Celsius. When the current hydraulic oil temperature is in the range of less than -15 degrees Celsius or greater than 100 degrees Celsius, a prompt can be made to prohibit the current mixer truck from operating. When the current hydraulic oil temperature is in the range of greater than or equal to -15 degrees Celsius and less than 6 degrees Celsius, it can be considered that the current mixer truck can only operate for a short time.

[0083] In the above embodiment, four temperature thresholds are set, dividing the system into three temperature alarm zones. Referring to the above embodiment, five temperature alarm zones can be set based on the four temperature thresholds. When the current hydraulic oil temperature meets any of the five temperature alarm zones, the monitoring controller 103 can send a status warning. Alternatively, the user can set more temperature thresholds, thereby dividing the system into more temperature alarm zones. For example, the user can set five temperature thresholds and divide the system into six temperature alarm zones. Optionally, when the temperature signal is greater than or equal to -5 degrees Celsius and less than or equal to 5 degrees Celsius, the user needs to continuously monitor the temperature signal to manage the operating status of the mixing tank in a timely manner.

[0084] Based on the above implementation methods, such as Figure 3 As shown, the system also includes: vehicle-mounted network device 301; wherein: vehicle-mounted network device 301 is connected to monitoring controller 103 and is used to send the rotation adjustment method and status warning information determined by monitoring controller 103 to network platform 302 for display.

[0085] In this embodiment, the vehicle-mounted connected device 301 and the monitoring controller 103 can be connected via a Controller Area Network (CAN) bus. The vehicle-mounted connected device 301 can upload the rotation adjustment method and status warning information to the connected platform 302 in real time via a mobile network or a wireless network. The mobile network can be a network supporting the 4th Generation mobile communication technology (4G) or the 5th Generation mobile communication technology (5G). Various devices can be used to display the rotation adjustment method and status warning information, such as LCD displays, mobile phones, and tablet computers.

[0086] The advantage of this setup is that users can be promptly notified of any abnormalities in the mixer truck's status through status alerts.

[0087] The technical solution of this embodiment includes: a Hall sensor, at least two magnets, a monitoring controller, a temperature sensor, a signal indicator light, and an on-board network device. Each magnet is evenly distributed and installed on the bolts of the mixing tank mounted on the mixer truck. A dual Hall sensor is disposed on the opposite end face of the bolt, corresponding to the bolt position, and installed in a pre-indicated area on the opposite end face. The dual Hall sensor generates pulse signals as the mixing tank rotates, passing through each magnet, and sends the pulse signals to the monitoring controller. The monitoring controller determines the rotation direction of the mixing tank based on the pulse signals and the positional relationship between the dual Hall sensors and the pre-indicated area; and determines the rotation speed of the mixing tank based on the pulse signals and the number of magnets. The temperature sensor... Sensors are installed on the hydraulic motor of the mixer truck to acquire the temperature signal of the hydraulic oil and send it to the monitoring controller. The monitoring controller determines the rotation adjustment method of the mixing tank and the status warning information of the mixing tank based on the temperature signal, rotation speed, and rotation direction. The vehicle-mounted network device is connected to the monitoring controller and sends the rotation adjustment method and status warning information determined by the monitoring controller to the network platform for display. This solves the problem that monitoring only the rotation speed of the mixing tank leads to inaccurate monitoring results of the mixer truck. It can realize real-time monitoring and warning of the mixer truck, which makes it easier for users to manage the operating status of the mixer truck in a timely manner, avoids the occurrence of material solidification or theft, and reduces the monitoring and maintenance costs of the mixer truck.

[0088] Example 3

[0089] Figure 4 This is a structural schematic diagram of a mixer truck according to Embodiment 3 of the present invention. Figure 4As shown, the mixer truck 10 includes a mixing tank 401, a truck head 402, a hydraulic motor (not shown), a dual Hall sensor 101, at least two magnets 102, a monitoring controller 103, and a temperature sensor (not shown). Specifically: the temperature sensor (not shown) is mounted on the hydraulic motor (not shown); the monitoring controller 103 can be mounted on the truck head 402; the magnets 102 are evenly distributed and mounted on the bolts of the mixing tank 401 mounted on the mixer truck 10; the dual Hall sensor 101 is located on the opposite end face of the bolt, corresponding to the bolt position, and installed in a pre-indicating area on the opposite end face; the dual Hall sensor 101 generates pulse signals as the mixing tank 401 rotates, passing through the magnets 102, and sends the pulse signals to the monitoring controller 103; the monitoring controller 103 is used for... The rotation direction of the mixing tank 401 is determined based on the pulse signal and the positional relationship between the dual Hall sensor 101 and the pre-indicated area; and the rotation speed of the mixing tank 401 is determined based on the pulse signal and the number of magnets 102; a temperature sensor (not shown in the figure) is installed on the hydraulic motor (not shown in the figure) of the mixer truck to acquire the temperature signal of the hydraulic oil and send it to the monitoring controller 103; the monitoring controller 103 is used to determine the rotation adjustment method of the mixing tank 401 and the status warning information of the mixing tank 401 based on the temperature signal, rotation speed, and rotation direction. The mixer truck 10 of this embodiment may also include an on-board network device (not shown in the figure), which is installed at the front of the truck 402.

[0090] The technical solution of this invention, by installing a mixer truck monitoring system on the mixer truck, solves the problem of inaccurate monitoring results caused by only monitoring the rotation speed of the mixer truck. It enables real-time monitoring of the mixer truck, improving the accuracy of monitoring and reducing maintenance and monitoring costs. Secondly, by uploading status warning information through onboard terminal equipment, users can promptly obtain the operating status of the mixer truck, improving management efficiency.

[0091] Example 4

[0092] Figure 5This is a flowchart of a concrete mixer truck monitoring method according to Embodiment 4 of the present invention. This embodiment is applicable to monitoring concrete mixer trucks, and the method can be executed by a concrete mixer truck monitoring system. The concrete mixer truck monitoring system includes: a dual Hall effect sensor, at least two magnets, a monitoring controller, and a temperature sensor; wherein: each magnet is evenly distributed and installed on the bolts of the mixing tank loaded on the concrete mixer truck; the dual Hall effect sensor is disposed on the opposite end face of the bolt, corresponding to the bolt position, and installed in a pre-indicated area on the opposite end face; the dual Hall effect sensor generates pulse signals as the mixing tank rotates, passing through each magnet, and sends the pulse signals to the monitoring controller; the monitoring controller determines the rotation direction of the mixing tank based on the pulse signals and the positional relationship between the dual Hall effect sensor and the pre-indicated area; and determines the rotation speed of the mixing tank based on the pulse signals and the number of magnets; the temperature sensor is disposed on the hydraulic motor of the concrete mixer truck, and is used to acquire the temperature signal of the hydraulic oil and send it to the monitoring controller; the monitoring controller determines the rotation adjustment method of the mixing tank and the status warning information of the mixing tank based on the temperature signal, rotation speed, and rotation direction.

[0093] This concrete mixer truck monitoring method and the concrete mixer truck monitoring system provided in any of the above embodiments belong to the same inventive concept. Details not described in detail in the method embodiments can be referred to the description in any of the above embodiments.

[0094] like Figure 5 As shown, the concrete mixer truck monitoring method provided in this embodiment includes:

[0095] S310: Through dual Hall sensors, as the mixing tank rotates, pulse signals are generated by passing through each magnet and sent to the monitoring controller.

[0096] Optionally, a dual Hall sensor installation positioning mark arrow is provided on the opposite end face; the installation positioning mark arrow divides the opposite end face into two symmetrical installation indication areas; the first Hall sensor of the dual Hall sensor is installed in the left installation indication area and corresponds to the bolt position; the second Hall sensor of the dual Hall sensor is installed in the right installation indication area and corresponds to the bolt position.

[0097] The advantage of this setup is that, compared to installing only one magnet, which requires the mixing tank to rotate one full revolution to obtain the direction and speed of rotation, this embodiment can determine the direction and speed of rotation when the mixing tank has rotated a quarter revolution. Secondly, it can obtain information on whether the mixing tank is rotating in a shorter time, effectively preventing material stagnation and malicious material theft. Furthermore, the monitoring controller can monitor the direction of rotation of the mixing tank based on the sequence of pulse signals sent by the two Hall sensors. S320: The monitoring controller determines the direction of rotation of the mixing tank based on the pulse signals and the positional relationship between the dual Hall sensors and the pre-indicated area; and determines the rotation speed of the mixing tank based on the pulse signals and the number of magnets.

[0098] Optionally, the monitoring controller is specifically used to: determine the timing relationship between the first pulse signal and the second pulse signal based on the first pulse signal and the second pulse signal corresponding to the first Hall sensor and the second Hall sensor, respectively; and determine the rotation direction of the mixing tank based on the timing relationship and the installation indication areas where the first Hall sensor and the second Hall sensor are located, respectively.

[0099] S330: The temperature signal of the hydraulic oil is obtained through the temperature sensor and sent to the monitoring controller.

[0100] Optionally, the monitoring controller is specifically used to: indicate an abnormal operating temperature of the mixing tank and prompt a reduction in the mixing tank's rotation speed when the temperature signal meets the short-term operating temperature condition and the rotation speed is greater than or equal to a first preset speed threshold; when the temperature signal meets the short-term operating temperature condition and the rotation speed is less than the first preset speed threshold; or, when the temperature signal meets the prohibited operating temperature condition, indicate an abnormal operating temperature of the mixing tank and initiate a shutdown inspection; when the temperature signal meets the stable operating temperature condition, the rotation direction is forward, and the rotation speed is greater than or equal to a second preset speed threshold, indicate that the mixing tank is operating normally; when the temperature signal meets the stable operating temperature condition, the rotation direction is forward, and the rotation speed is less than the second preset speed threshold, indicate an abnormal operating speed of the mixing tank and prompt an increase in the mixing tank's rotation speed; when the temperature signal meets the stable operating temperature condition and the rotation direction is reverse, indicate an abnormal operating direction of the mixing tank; wherein, the second preset speed threshold is less than the first preset speed threshold.

[0101] Optionally, the stable operating temperature condition is that the temperature signal is greater than a first temperature threshold and less than a second temperature threshold; the short-term operating temperature condition is that the temperature signal is greater than or equal to a third temperature threshold and less than or equal to a first temperature threshold; or, the temperature signal is greater than or equal to a second temperature threshold and less than or equal to a fourth temperature threshold; the prohibited operating temperature condition is that the temperature signal is less than a third temperature threshold, or, the temperature signal is greater than a fourth temperature threshold; wherein, the third temperature threshold is less than the first temperature threshold, the first temperature threshold is less than the second temperature threshold, and the second temperature threshold is less than the fourth temperature threshold.

[0102] For example, the first preset speed threshold can be 3 revolutions per minute (RPM) or 1 RPM. The specific value can be adjusted according to actual conditions, and this embodiment does not impose any limitations on this. When the current hydraulic oil temperature is within the range of -10°C to 6°C, or within the range of 87°C to 100°C, if the rotation speed is greater than 3 RPM, it can indicate an abnormal operating temperature of the mixing tank and prompt the driver to reduce the speed of the mixing tank; or if the rotation speed is less than 1 RPM, it can indicate an abnormal operating temperature of the mixing tank, and the driver should stop the vehicle for inspection.

[0103] When the current hydraulic oil temperature is below -10 degrees Celsius or above 100 degrees Celsius, an abnormal operating temperature of the mixing tank can be directly indicated, prompting the driver to stop and inspect the tank. Forward rotation means the mixing tank rotates from left to right, and reverse rotation means the mixing tank rotates from right to left.

[0104] When the current hydraulic oil temperature is between 6 degrees Celsius and 87 degrees Celsius, if the rotation direction is forward and the rotation speed is less than 1 revolution per minute, it indicates that the operating speed of the agitator is abnormal and suggests increasing the speed of the agitator. Alternatively, if the agitator rotates in reverse, it indicates that the operating direction of the agitator is abnormal.

[0105] By obtaining the direction and speed of rotation of the mixing tank, it is possible to determine whether the mixing tank is in the unloading state, thus preventing drivers from maliciously stealing materials.

[0106] S340. By monitoring the controller, the rotation adjustment method of the mixing tank and the status warning information of the mixing tank are determined based on the temperature signal, rotation speed and rotation direction.

[0107] Based on the above implementation method, the number of magnets is 4.

[0108] The technical solution of this invention uses a dual Hall effect sensor. As the mixing tank rotates, pulse signals are generated by passing through various magnets and sent to a monitoring controller. The monitoring controller determines the rotation direction of the mixing tank based on the pulse signals and the positional relationship between the dual Hall effect sensor and a pre-indicated area. It also determines the rotation speed of the mixing tank based on the pulse signals and the number of magnets. A temperature sensor acquires the temperature signal of the hydraulic oil and sends it to the monitoring controller. The monitoring controller then determines the rotation adjustment method and status warning information of the mixing tank based on the temperature signal, rotation speed, and rotation direction. This solves the problem of inaccurate monitoring results caused by only monitoring the rotation speed of the mixing truck. It enables real-time monitoring and warning of the mixing truck, improving the efficiency of mixing truck monitoring and reducing its cost.

[0109] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0110] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A concrete mixer truck monitoring system, characterized in that, The system includes: a dual Hall effect sensor, at least two magnets, a monitoring controller, and a temperature sensor; wherein: Each of the magnets is evenly distributed and installed on the bolts of the mixing tank loaded on the mixer truck; the dual Hall sensor is disposed on the opposite end face of the bolt, corresponding to the position of the bolt, and installed in the pre-indication area of ​​the opposite end face; the opposite end face is provided with a dual Hall sensor installation positioning mark arrow; the installation positioning mark arrow divides the opposite end face into two symmetrical installation indication areas; the first Hall sensor of the dual Hall sensor is installed in the left installation indication area and corresponds to the position of the bolt; the second Hall sensor of the dual Hall sensor is installed in the right installation indication area and corresponds to the position of the bolt. The dual Hall sensor is used to generate pulse signals as the stirring tank rotates, passing through each of the magnets, and then send the pulse signals to the monitoring controller. The monitoring controller is used to determine the timing relationship between the first pulse signal and the second pulse signal based on the first pulse signal and the second pulse signal corresponding to the first Hall sensor and the second Hall sensor, respectively. Based on the timing relationship and the installation indication areas where the first Hall sensor and the second Hall sensor are respectively located, the rotation direction of the mixing tank is determined; The rotational speed of the mixing tank is determined based on the pulse signal and the number of magnets. The temperature sensor is installed on the hydraulic motor of the mixer truck and is used to obtain the temperature signal of the hydraulic oil according to the principle of power-type thermistor temperature measurement and send it to the monitoring controller. The monitoring controller is used to determine the rotation adjustment method of the mixing tank and the status warning information of the mixing tank based on the temperature signal, the rotation speed, and the rotation direction.

2. The system according to claim 1, characterized in that, The monitoring controller is specifically used for: When the temperature signal meets the short-term operating temperature conditions and the rotation speed is greater than or equal to the first preset speed threshold, it indicates that the operating temperature of the mixing tank is abnormal and prompts to reduce the rotation speed of the mixing tank. When the temperature signal meets the short-term operating temperature condition and the rotation speed is less than the first preset speed threshold; or when the temperature signal meets the prohibited operating temperature condition, the abnormal operating temperature of the mixing tank is indicated, and a shutdown inspection is performed. When the temperature signal meets the stable operating temperature condition, the rotation direction is forward, and the rotation speed is greater than or equal to the second preset speed threshold, it indicates that the mixing tank is operating normally. When the temperature signal meets the stable operating temperature condition, the rotation direction is forward, and the rotation speed is less than the second preset speed threshold, it indicates that the operating speed of the mixing tank is abnormal and prompts to increase the speed of the mixing tank. When the temperature signal meets the stable operating temperature condition and the rotation direction is reversed, it indicates that the running direction of the mixing tank is abnormal. Wherein, the second preset speed threshold is less than the first preset speed threshold.

3. The system according to claim 2, characterized in that, The stable operating temperature condition is that the temperature signal is greater than a first temperature threshold and less than a second temperature threshold. The short-term operating temperature condition is that the temperature signal is greater than or equal to a third temperature threshold and less than or equal to a first temperature threshold; or, the temperature signal is greater than or equal to a second temperature threshold and less than or equal to a fourth temperature threshold. The prohibited operating temperature condition is when the temperature signal is less than the third temperature threshold, or when the temperature signal is greater than the fourth temperature threshold. Among them, the third temperature threshold is less than the first temperature threshold, the first temperature threshold is less than the second temperature threshold, and the second temperature threshold is less than the fourth temperature threshold.

4. The system according to claim 1, characterized in that, The system also includes: signal indicator lights.

5. The system according to claim 1, characterized in that, The system further includes: an in-vehicle connected device; wherein: The vehicle-mounted connected device is connected to the monitoring controller and is used to send the rotation adjustment method and status warning information determined by the monitoring controller to the connected platform for display.

6. The system according to claim 1, characterized in that, The number of magnets is 4.

7. A mixer truck, characterized in that, The mixer truck is equipped with a mixer truck monitoring system as described in any one of claims 1-6.

8. A method for monitoring a concrete mixer truck, characterized in that, A concrete mixer truck monitoring system according to any one of claims 1-6, the system comprising: a dual Hall effect sensor, at least two magnets, a monitoring controller, and a temperature sensor; each of the magnets is evenly distributed and installed on bolts of the mixing tank loaded on the concrete mixer truck; the dual Hall effect sensor is disposed on the opposite end face of the bolt, corresponding to the position of the bolt, and installed in a pre-indication area on the opposite end face; a dual Hall effect sensor installation positioning arrow is provided in the opposite end face; the installation positioning arrow divides the opposite end face into two symmetrical installation indication areas; the first Hall effect sensor of the dual Hall effect sensor is installed in the left installation indication area, corresponding to the position of the bolt; the second Hall effect sensor of the dual Hall effect sensor is installed in the right installation indication area, corresponding to the position of the bolt; the temperature sensor is disposed on the hydraulic motor of the concrete mixer truck; As the mixing tank rotates, the dual Hall effect sensors generate pulse signals through the magnets and send these pulse signals to the monitoring controller. The monitoring controller determines the timing relationship between the first pulse signal and the second pulse signal based on the first pulse signal and the second pulse signal corresponding to the first Hall sensor and the second Hall sensor, respectively. Based on the timing relationship and the installation indication areas where the first Hall sensor and the second Hall sensor are respectively located, the rotation direction of the mixing tank is determined; The rotational speed of the mixing tank is determined based on the pulse signal and the number of magnets. The temperature sensor acquires the hydraulic oil temperature signal based on the power-type thermistor temperature measurement principle and sends it to the monitoring controller. The monitoring controller determines the rotation adjustment method and status warning information of the mixing tank based on the temperature signal, the rotation speed, and the rotation direction.

Images