A sub-arm length detection system based on resistance value detection and a crane

Abstract

The application discloses a kind of resistance value detection-based auxiliary arm length detection system and crane in length detection field, including resistance detection device, data processing unit, data retrieval unit and data storage;Resistance element is provided on the truss arm of the auxiliary arm, the resistance of the resistance element and the length of the truss arm are set one by one corresponding;The data processing unit corrects resistance data collected by the resistance detection device using ambiguity correction model, and sends the corrected resistance data to data retrieval unit;The data retrieval unit retrieves the length of the truss arm corresponding to the corrected resistance data;The data processing unit calculates the auxiliary arm length measurement according to the length of each truss arm;The installed auxiliary arm length is automatically identified, and the working condition of auxiliary arm is automatically checked and safety prompt is provided, to improve the operability, safety and user experience of crane.

Description

Technical Field

[0001] This invention belongs to the field of length detection technology, specifically relating to a boom length detection system and crane based on resistance value detection. Background Technology

[0002] Cranes are large, complex, and specialized pieces of equipment. Their operation is difficult and demands a high level of skill from the user. Improper operation can lead to serious safety accidents such as crane overturning and structural damage. This places higher safety requirements on crane manufacturers, often necessitating more complex operating procedures. Therefore, the need for intelligent crane operation is becoming increasingly urgent.

[0003] A crane jib system is a modular and detachable truss boom structure installed at the boom head, providing a wider working space for the crane. Traditionally, jib systems consist of various fixed-length truss boom structures, each with different rated loads. The selection of the jib's operating condition has always been based on user choice. Incorrect selection often leads to errors in the rated load calculated by the crane control system, causing operational safety protection functions to fail, resulting in overloading and serious safety accidents. Furthermore, to meet diverse market demands, jib systems now offer an increasing number of structural combinations with different lengths, leading to a higher error rate during installation and selection by users. Summary of the Invention

[0004] The purpose of this invention is to provide a boom length detection system and crane based on resistance value detection. Based on resistance value detection and identification technology, the system can automatically identify the length of the installed boom. When the user operates the crane, the system can automatically check the boom working condition and provide safety prompts, thereby reducing safety accidents caused by the user selecting the wrong working condition and improving the operability, safety and user experience of the crane.

[0005] To achieve the above objectives, the technical solution adopted by the present invention in the first aspect is as follows:

[0006] A secondary arm length detection system based on resistance value detection includes a resistance detection device, a data processing unit, a data retrieval unit, and a data storage unit; a resistive element is provided on the truss arm of the secondary arm, and the resistance value of the resistive element is set in a one-to-one correspondence with the length of the truss arm, and the data storage unit stores the mapping relationship between the resistance value of the resistive element and the length of the truss arm.

[0007] The resistive element is electrically connected to the resistance detection device; the resistance detection device is electrically connected to the data processing unit; the data processing unit is equipped with a fuzzy correction model constructed based on the membership function; the data processing unit uses the fuzzy correction model to correct the resistance data collected by the resistance detection device and sends the corrected resistance data to the data retrieval unit; the data retrieval unit uses the corrected resistance data as an index to retrieve the length of the truss arm corresponding to the corrected resistance data from the data storage; the data processing unit calculates the measured value of the sub-arm length based on the length of each truss arm and compares the measured value of the sub-arm length with the pre-selected sub-arm length information; when the error between the measured value of the sub-arm length and the preset sub-arm length information is greater than a set threshold, the data processing unit outputs a sub-arm installation length error warning.

[0008] Preferably, the resistance value of the resistive element is linearly related to the length of the corresponding truss arm.

[0009] Preferably, a temperature sensor is provided on the truss arm of the auxiliary arm; the temperature sensor is electrically connected to the data processing unit.

[0010] Preferably, the data processing unit adjusts the parameters of the ambiguity correction model based on the ambient temperature collected by the temperature sensor, and then uses the ambiguity correction model to correct the resistance data collected by the resistance detection device.

[0011] Preferably, the data processing unit is electrically connected to a human-machine interface; the human-machine interface is used to retrieve the measurement value of the auxiliary arm length, input the mapping relationship between the resistance value of the resistive element and the length of the truss arm, and the pre-selected auxiliary arm length information.

[0012] Preferably, the data processing unit, data retrieval unit, and data storage unit are integrated on a printed circuit board.

[0013] In a second aspect, the present invention provides a method for detecting the length of a secondary arm based on resistance value detection, comprising:

[0014] The mapping information between the resistance value of the resistive element and the length of the truss arm is collected and constructed into a database;

[0015] A fuzzy correction model based on membership function is constructed; a control resistance detection device is used to detect the resistance value of the resistance element on each truss arm and obtain the temperature data detected by the temperature sensor on each truss arm.

[0016] After adjusting the parameters of the ambiguity correction model based on the ambient temperature collected by the temperature sensor, the ambiguity correction model is used to correct the resistance data collected by the resistance detection device.

[0017] The corrected resistance data is used as an index to retrieve the length of the truss arm corresponding to the corrected resistance data from the database;

[0018] The length of the auxiliary arm is calculated based on the length of each truss arm, and the measured value of the auxiliary arm length is compared with the pre-selected auxiliary arm length information. When the error between the measured value of the auxiliary arm length and the preset auxiliary arm length information is greater than a set threshold, an auxiliary arm installation length error warning is output.

[0019] Preferably, the resistance value of the resistive element is linearly related to the length of the corresponding truss arm.

[0020] In a second aspect, the present invention provides a crane, including a body; the body is provided with a boom and a boom length detection system.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0022] The truss arm of the auxiliary boom in this invention is equipped with a resistance element and a temperature sensor; the data processing unit corrects the resistance data collected by the resistance detection device based on the ambient temperature collected by the temperature sensor, and sends the corrected resistance data to the data retrieval unit; the data retrieval unit uses the corrected resistance data as an index to retrieve the length of the truss arm corresponding to the corrected resistance data from the data storage; the length of the installed auxiliary boom is automatically identified, the auxiliary boom working condition is automatically checked and safety prompts are provided, thereby improving the operability, safety and user experience of the crane. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a secondary arm length detection system based on resistance value detection provided by the present invention;

[0024] Figure 2 This is a flowchart of the auxiliary arm length detection provided by the present invention;

[0025] Figure 3 This is a flowchart illustrating the implementation of the arm length detection method provided by the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0027] It should be noted that in the description of this invention, the terms "front," "rear," "left," "right," "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "front," "rear," "left," "right," "upper," and "lower" used in the description of this invention refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0028] Example 1

[0029] like Figures 1 to 3 As shown, a secondary arm length detection system based on resistance value detection includes: a resistance detection device, a data processing unit, a data retrieval unit, and a data storage device; the data processing unit, the data retrieval unit, and the data storage device are integrated on the same printed circuit board.

[0030] The truss arm of the auxiliary arm is equipped with a resistive element and a temperature sensor. The resistance value of the resistive element is set to correspond one-to-one with the length of the truss arm, and the data memory stores the mapping relationship between the resistance value of the resistive element and the length of the truss arm. The resistance value of the resistive element and the length of the corresponding truss arm are linearly related. The connection method of the resistive element is not limited to parallel connection. It can also be series connection, series and parallel connection, or other methods.

[0031] The resistive element is electrically connected to the resistance detection device; the resistance detection device and the temperature sensor are electrically connected to the data processing unit; the data processing unit has an ambiguity correction model constructed based on the membership function; the data processing unit adjusts the parameters of the ambiguity correction model according to the ambient temperature collected by the temperature sensor, then uses the ambiguity correction model to correct the resistance data collected by the resistance detection device, and sends the corrected resistance data to the data retrieval unit; the data retrieval unit uses the corrected resistance data as an index to retrieve the length of the truss arm corresponding to the corrected resistance data from the data storage; the data processing unit calculates the measured value of the sub-arm length based on the length of each truss arm, and compares the measured value of the sub-arm length with the pre-selected sub-arm length information; when the error between the measured value of the sub-arm length and the preset sub-arm length information is greater than a set threshold, the data processing unit outputs a sub-arm installation length error warning.

[0032] The data processing unit is electrically connected to a human-machine interface; the human-machine interface is used to retrieve the measured value of the jib length, input the mapping relationship between the resistance value of the resistor element and the length of the gantry arm, and the pre-selected jib length information; thereby improving the operability, safety, and user experience of the crane.

[0033] Example 2

[0034] This embodiment provides a method for detecting the length of a secondary arm based on resistance value detection. This method can be applied to the secondary arm length detection system described in Embodiment 1. The secondary arm length detection method includes:

[0035] The resistance value of the resistor element and the length of the truss arm are collected and mapped to a database; the resistance value of the resistor element and the length of the corresponding truss arm have a linear relationship.

[0036] An ambiguity correction model is constructed based on a membership function; the ambiguity correction model is programmed to generate software that can run on a specified in-vehicle computing unit, and the software is then implanted into the specified in-vehicle computing unit for operation.

[0037] The control resistance detection device detects the resistance value of the resistive element on each truss arm and obtains the temperature data detected by the temperature sensor on each truss arm; after adjusting the parameters of the ambiguity correction model according to the ambient temperature collected by the temperature sensor, the ambiguity correction model is used to correct the resistance data collected by the resistance detection device.

[0038] The corrected resistance data is used as an index to retrieve the length of the truss arm corresponding to the corrected resistance data from the database;

[0039] The length of the auxiliary arm is calculated based on the length of each truss arm, and the measured value of the auxiliary arm length is compared with the pre-selected auxiliary arm length information. When the error between the measured value of the auxiliary arm length and the preset auxiliary arm length information is greater than a set threshold, an auxiliary arm installation length error warning is output.

[0040] The calculated boom length measurement can also be used for crane status display, working condition recommendation, or crane safety protection functions.

[0041] Example 3

[0042] This embodiment provides a crane, including a body; the body is equipped with a secondary boom and the secondary boom length detection system described in Embodiment 1.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A sub-arm length detection system based on resistance value detection, characterized by, The resistance detection device, the data processing unit, the data retrieval unit and the data storage are included; resistance elements are arranged on the truss arms of the auxiliary arm, the resistance values of the resistance elements correspond to the lengths of the truss arms one by one, and the data storage stores the mapping relationship between the resistance values of the resistance elements and the lengths of the truss arms; The resistance elements are electrically connected to the resistance detection device; the resistance detection device is electrically connected to the data processing unit; the data processing unit is provided with a fuzzy degree correction model constructed according to a membership function; the data processing unit corrects the resistance data collected by the resistance detection device by using the fuzzy degree correction model, and sends the corrected resistance data to the data retrieval unit; The data retrieval unit takes the corrected resistance data as an index to retrieve the lengths of the truss arms corresponding to the corrected resistance data from the data storage; the data processing unit calculates the auxiliary arm length measurement value according to the lengths of the truss arms, and compares the auxiliary arm length measurement value with the preselected auxiliary arm length information; when the error between the auxiliary arm length measurement value and the preselected auxiliary arm length information is greater than a set threshold, the data processing unit outputs an auxiliary arm installation length error warning.

2. The system according to claim 1, wherein The resistance values of the resistance elements have a linear relationship with the lengths of the corresponding truss arms.

3. The system according to claim 1, wherein Temperature sensors are arranged on the truss arms of the auxiliary arm; the temperature sensors are electrically connected to the data processing unit.

4. The system according to claim 3, wherein The data processing unit adjusts the parameters of the fuzzy degree correction model according to the ambient temperature collected by the temperature sensors, and corrects the resistance data collected by the resistance detection device by using the fuzzy degree correction model.

5. The system according to claim 1, wherein A man-machine interaction interface is electrically connected to the data processing unit; the man-machine interaction interface is used to retrieve the auxiliary arm length measurement value, input the mapping relationship between the resistance values of the resistance elements and the lengths of the truss arms, and input the preselected auxiliary arm length information.

6. The system according to claim 1, wherein The data processing unit, the data retrieval unit and the data storage are integrated on a printed circuit board.

7. The control method of the sub-arm length detection system according to any one of claims 1 to 6, characterized by, The mapping information between the resistance values of the resistance elements and the lengths of the truss arms is collected and constructed as a database; A fuzzy degree correction model constructed based on a membership function; The resistance detection device detects the resistance values of the resistance elements on each truss arm, and obtains the temperature data detected by the temperature sensors on each truss arm; The data processing unit adjusts the parameters of the fuzzy degree correction model according to the ambient temperature collected by the temperature sensors, and corrects the resistance data collected by the resistance detection device by using the fuzzy degree correction model; The corrected resistance data is taken as an index to retrieve the lengths of the truss arms corresponding to the corrected resistance data from the database; The data processing unit calculates the auxiliary arm length measurement value according to the lengths of the truss arms, and compares the auxiliary arm length measurement value with the preselected auxiliary arm length information; when the error between the auxiliary arm length measurement value and the preselected auxiliary arm length information is greater than a set threshold, the data processing unit outputs an auxiliary arm installation length error warning. The resistance values of the resistance elements have a linear relationship with the lengths of the corresponding truss arms.

8. The detection method according to claim 7, characterized in that, 9. A crane comprising a vehicle body; the vehicle body is provided with an auxiliary arm and an auxiliary arm length detection system according to any one of claims 1 to 6. ​

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