Electric control system for hydraulic system of aerial work platform

Abstract

The invention relates to an electric control system for a hydraulic system of an aerial work platform. The electric control system comprises at least two adjacent hydraulic oil ways and a pressure and state monitoring system arranged between the two hydraulic oil ways. The pressure and state monitoring system comprises a pressure monitoring loop which is used for collecting pressure data in a hydraulic oil way in real time, comparing and analyzing the pressure data with a preset normal pressure range, and triggering a corresponding alarm and protection mechanism to ensure safe and stable operation of a hydraulic system when pressure abnormity is detected; the overall operation of the hydraulic system is accurately regulated and controlled according to the working state feedback information of each hydraulic oil circuit; the hydraulic oil way comprises an oil outlet located in the hydraulic pump, an oil inlet located in the execution element and an oil return way located between the oil outlet and the oil inlet, the oil outlet is provided with a piezoresistive pressure sensor, and the oil inlet is provided with a strain type pressure sensor; capacitive pressure sensors are linearly arranged on the oil return way.

Description

Technical Field

[0001] The present application relates to the technical field of aerial work, and in particular to an electronic control system for a hydraulic system of an aerial work platform. Background Art

[0002] Most existing aerial work platforms use traditional hydraulic control systems, which have problems such as slow response speed, low precision, and high maintenance costs. With the development of electronic technology, how to improve the control performance of hydraulic systems has become an important research direction.

[0003] During the long-distance transmission of hydraulic oil in the aerial work platform, the loss along the pipeline is ΔP = k × ρ × L × v2 / 2 / d, where k is the flow coefficient, ρ is the liquid density, L is the pipeline length, v is the flow velocity, and d is the pipe diameter. When the hydraulic oil model is selected and the pipe diameter is determined, the loss along the pipeline is related to the pipeline length and flow velocity. The flow velocity v = q / A, where q is the flow rate and A is the cross-sectional area of ​​the pipeline. After the pipeline is selected, A is determined. The flow velocity is related to the flow rate. The flow rate q = V × r, where V is the displacement of the pump and r is the speed. When the displacement and speed of the pump are fixed, the flow rate can be considered unchanged. At this time, the loss along the pipeline is only positively correlated with the length of the pipeline L, that is, the longer the pipeline, the greater the loss along the pipeline (without considering the change in flow coefficient caused by oil temperature changes). However, in the actual pipeline layout, the length of the pipeline is restricted by the structure, especially in the application of engineering machinery several meters high. The pipeline from the chassis to the platform is long and cannot be shortened, which leads to increased loss along the pipeline, increased wasted power, and reduced overall machine efficiency.

[0004] Therefore, we propose here an electronic control system for the hydraulic system of an aerial work platform. Summary of the invention

[0005] The main purpose of the present application is to provide an electronic control system for a hydraulic system of an aerial work platform, aiming to solve the problem of energy waste caused by pipeline losses along the way during long-distance energy transmission of the aerial work platform in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides an electronic control system for a hydraulic system of an aerial work platform, comprising: at least two adjacent hydraulic oil circuits, and a pressure and state monitoring system arranged between the two hydraulic oil circuits; the pressure and state monitoring system comprises: a pressure monitoring circuit, the pressure monitoring circuit is used to collect pressure data in the hydraulic oil circuit in real time, and compare and analyze it with a preset normal pressure range, and when abnormal pressure is detected, the corresponding alarm and protection mechanism is triggered to ensure the safe and stable operation of the hydraulic system; and according to the feedback information of the working state of each hydraulic oil circuit, the overall operation of the hydraulic system is precisely regulated;

[0007] The hydraulic oil circuit includes: an oil outlet located in the hydraulic pump, an oil inlet located in the actuator, and an oil return circuit located between the oil outlet and the oil inlet. The oil outlet is provided with a piezoresistive pressure sensor for accurately measuring the output pressure of the hydraulic oil, which is used as an important basis for judging the working state of the hydraulic pump; the oil inlet is provided with a strain gauge pressure sensor for reflecting the load condition of the actuator by measuring the pressure change in the oil circuit; capacitive pressure sensors are linearly arranged on the oil return circuit for real-time monitoring of the pressure change during the oil return process.

[0008] Preferably, the piezoresistive pressure sensor, strain gauge pressure sensor and capacitive pressure sensor are configured using a timestamp alignment technique and are transmitted to the pressure and status monitoring system via a CAN bus.

[0009] Preferably, the timestamp alignment technology is a combination of reference clock calibration and period synchronization compensation.

[0010] Preferably, the reference clock calibration is specifically:

[0011] S1, the main controller of the pressure and state monitoring system sends a unified reference clock signal to the piezoresistive pressure sensor, the strain gauge pressure sensor and the capacitive pressure sensor through the CAN bus;

[0012] S2. After receiving the reference clock signal sent out, the piezoresistive pressure sensor, strain gauge pressure sensor and capacitive pressure sensor calibrate their own internal clock modules.

[0013] Preferably, the periodic synchronization compensation is specifically:

[0014] S3, the main controller of the pressure and state monitoring system broadcasts a time synchronization frame according to a preset alignment period;

[0015] S4, after receiving the synchronization frame, the piezoresistive pressure sensor, the strain gauge pressure sensor and the capacitive pressure sensor adjust the offset of the local clock and eliminate the clock cumulative error caused by crystal oscillator drift or ambient temperature change;

[0016] S5, the main controller broadcasts the synchronous sampling instruction through the CAN bus, and after receiving the instruction, the piezoresistive, strain gauge and capacitive sensors simultaneously start sampling the pressure signal in the next alignment cycle;

[0017] S6, adding a timestamp to the sampled pressure signal data and encapsulating it into a CAN message;

[0018] S7. After receiving the multi-sensor data packet through the CAN bus, the main controller performs multi-channel data alignment based on the timestamp.

[0019] Preferably, the timestamp format adopts IEEE 1588.

[0020] Preferably, the step S7 specifically includes: using a sliding window algorithm to compensate for the transmission delay difference, performing cubic spline interpolation processing on the cross-cycle data, and finally generating a multi-channel pressure data set with a unified time reference.

[0021] Preferably, before the interpolation calculation, the interpolation allowable range is set; when the pressure gradient of adjacent nodes exceeds the preset safety range (such as ±10% FS / ms), it automatically switches to the linear interpolation mode;

[0022] The preset interpolation allowable range P S Specifically: Through formula (1) P S =K×(P0+ΔP v +ΔP m )+ΔP f Calculated;

[0023] Where P0 is the basic pressure value generated by the weight of the carrier; ΔP v is the pressure increment generated when the carrier speed increases from the initial speed 0 to the normal operating speed 1, ΔP m It is the additional pressure exerted by the material on the carrier plate.

[0024] Preferably, the pressure and state monitoring system is integrated with a synchronization accuracy self-diagnosis module, which is used to automatically trigger an emergency synchronization mode when it is detected that the clock deviation of a certain sensor exceeds a preset threshold;

[0025] The emergency synchronization mode is set in a dual timestamp manner, and the dual timestamp manner is specifically: the original sampling timestamp and the compensated timestamp are synchronously encapsulated.

[0026] The beneficial effects of the technical solution of the present invention are:

[0027] The pressure data in the hydraulic oil circuit is collected in real time through the pressure monitoring circuit, and compared and analyzed with the preset normal pressure range. When abnormal pressure is detected, the corresponding alarm and protection mechanism is triggered to ensure the safe and stable operation of the hydraulic system and effectively prevent equipment damage and safety accidents caused by excessive or low pressure. At the same time, according to the feedback information of the working status of each hydraulic oil circuit, the overall operation of the hydraulic system is precisely regulated. For example, when the output pressure exceeds the set safety range, an alarm is issued in time and the pump speed is adjusted or the pump is stopped; when the load on the actuator is too large or too small, it can be fed back to the control system in time so that the hydraulic system can be adjusted accordingly to ensure the normal operation of the actuator.

[0028] Capacitive pressure sensors are arranged linearly on the oil line to monitor the pressure changes in the oil return process in real time. When the oil return pressure is abnormal, it can be detected and notified to the control system for processing in time to prevent the hydraulic system from malfunctioning due to poor oil return, thereby extending the service life of the equipment.

[0029] Through the high-speed transmission characteristics of the CAN bus, combined with the timestamp alignment technology, the fast and accurate transmission of multi-sensor data is achieved. It ensures that the pressure and status monitoring system can respond to changes in the hydraulic system in real time, trigger alarms and protection mechanisms in a timely manner, and effectively prevent equipment damage and safety accidents caused by abnormal pressure. And using the timestamp in the IEEE 1588 format, a high-precision time mark is provided for each sampled pressure signal.

[0030] On the other hand, the cycle synchronization compensation mechanism eliminates the clock accumulation error caused by crystal drift or ambient temperature changes, and enhances the stability and reliability of the system. At the same time, the data is packaged and transmitted through timestamps, which also reduces the risk of data loss or errors. And through reference clock calibration and cycle synchronization compensation, the data of each sensor (piezoresistive, strain, capacitive) is accurately aligned in time, so as to accurately judge the operating status of the hydraulic system and ensure that the control system can compare the data of different sensors under the same time reference to make more accurate decisions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a module structure diagram of an electronic control system for a hydraulic system of an aerial work platform in one embodiment of the present application;

[0032] Figure 2 This is a partial module structure diagram of an electronic control system for a hydraulic system of an aerial work platform in another embodiment of the present application.

[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] In addition, if the description of "first", "second", etc. is involved in this application, it is only used for descriptive purposes (such as for distinguishing the same or similar elements), and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0036] See also Figure 1-Figure 2 The present invention proposes an electronic control system for a hydraulic system of an aerial work platform, comprising: at least two adjacent hydraulic oil circuits, and a pressure and state monitoring system arranged between the two hydraulic oil circuits; the pressure and state monitoring system comprises: a pressure monitoring circuit, the pressure monitoring circuit is used to collect pressure data in the hydraulic oil circuit in real time, and compare and analyze it with a preset normal pressure range, and when abnormal pressure is detected, the corresponding alarm and protection mechanism is triggered to ensure the safe and stable operation of the hydraulic system; and according to the feedback information of the working state of each hydraulic oil circuit, the overall operation of the hydraulic system is accurately regulated;

[0037] The hydraulic oil circuit includes: an oil outlet in the hydraulic pump, an oil inlet in the actuator, and an oil return circuit between the oil outlet and the oil inlet. The oil outlet is provided with a piezoresistive pressure sensor for accurately measuring the output pressure of the hydraulic oil, which is used as an important basis for judging the working state of the hydraulic pump. The oil inlet is provided with a strain gauge pressure sensor to reflect the load of the actuator by measuring the pressure change in the oil circuit; the capacitive pressure sensors are linearly arranged on the oil return circuit to monitor the pressure change in the oil return process in real time.

[0038] In this embodiment, the pressure data in the hydraulic oil circuit is collected in real time through the pressure monitoring circuit, and compared and analyzed with the preset normal pressure range. When abnormal pressure is detected, the corresponding alarm and protection mechanism is triggered to ensure the safe and stable operation of the hydraulic system and effectively prevent equipment damage and safety accidents caused by excessive or low pressure. At the same time, according to the feedback information of the working status of each hydraulic oil circuit, the overall operation of the hydraulic system is precisely regulated. For example, when the output pressure exceeds the set safety range, an alarm is issued in time and the pump speed is adjusted or the pump is stopped; when the load on the actuator is too large or too small, it can be fed back to the control system in time so that the hydraulic system can be adjusted accordingly to ensure the normal operation of the actuator.

[0039] On the other hand, capacitive pressure sensors are arranged linearly on the oil line to monitor the pressure changes in the oil return process in real time. When the oil return pressure is abnormal, it can be discovered and notified to the control system for processing in time to prevent the hydraulic system from malfunctioning due to poor oil return, thereby extending the service life of the equipment.

[0040] In one embodiment, the piezoresistive pressure sensor, strain gauge pressure sensor and capacitive pressure sensor are configured using a timestamp alignment technique and are transmitted to a pressure and status monitoring system via a CAN bus.

[0041] The timestamp alignment technology is a combination of reference clock calibration and period synchronization compensation.

[0042] The reference clock calibration is specifically as follows:

[0043] S1, the main controller of the pressure and state monitoring system sends a unified reference clock signal to the piezoresistive pressure sensor, the strain gauge pressure sensor and the capacitive pressure sensor through the CAN bus;

[0044] S2. After receiving the reference clock signal sent above, the piezoresistive pressure sensor, the strain gauge pressure sensor and the capacitive pressure sensor calibrate their own internal clock modules;

[0045] The cycle synchronization compensation is specifically:

[0046] S3, the main controller of the pressure and state monitoring system broadcasts the time synchronization frame according to the preset alignment period; wherein the preset alignment period is 100ms;

[0047] S4, after receiving the synchronization frame, the piezoresistive pressure sensor, the strain gauge pressure sensor and the capacitive pressure sensor adjust the offset of the local clock and eliminate the clock cumulative error caused by crystal oscillator drift or ambient temperature change;

[0048] S5, the main controller broadcasts the synchronous sampling instruction through the CAN bus, and after receiving the instruction, the piezoresistive, strain gauge and capacitive sensors simultaneously start sampling the pressure signal in the next alignment cycle;

[0049] S6, adding a timestamp to the sampled pressure signal data and encapsulating it into a CAN message, and the timestamp format adopts IEEE 1588;

[0050] S7. After receiving the multi-sensor data packet through the CAN bus, the main controller performs multi-channel data alignment based on the timestamp.

[0051] In this embodiment, the high-speed transmission characteristics of the CAN bus are combined with the timestamp alignment technology to achieve fast and accurate transmission of multi-sensor data. It ensures that the pressure and state monitoring system can respond to changes in the hydraulic system in real time, trigger alarms and protection mechanisms in a timely manner, and effectively prevent equipment damage and safety accidents caused by abnormal pressure. And the timestamp in the IEEE 1588 format is used to provide a high-precision time mark for each sampled pressure signal.

[0052] On the other hand, the cycle synchronization compensation mechanism eliminates the clock accumulation error caused by crystal drift or ambient temperature changes, and enhances the stability and reliability of the system. At the same time, the data is packaged and transmitted through timestamps, which also reduces the risk of data loss or errors. And through reference clock calibration and cycle synchronization compensation, the data of each sensor (piezoresistive, strain, capacitive) is accurately aligned in time, so as to accurately judge the operating status of the hydraulic system and ensure that the control system can compare the data of different sensors under the same time reference to make more accurate decisions.

[0053] In one embodiment, step S7 specifically includes: using a sliding window algorithm to compensate for transmission delay differences, performing cubic spline interpolation processing on cross-cycle data, and finally generating a multi-channel pressure data set with a unified time reference.

[0054] In this embodiment, the sliding window algorithm can accurately identify and compensate for the transmission delay differences caused by different transmission paths or signal interference, ensuring the alignment of the pressure data of each channel on the same time base, thereby eliminating the impact of transmission delay on the system monitoring and control accuracy. At the same time, the cubic spline interpolation processing can not only fill the blank areas in the cross-cycle data, but also ensure the smooth transition between the interpolated data and the original data, enhance the continuity of the data, make the pressure change trend clearer and more identifiable, and help the system capture and respond to pressure changes more accurately.

[0055] On the other hand, by generating a multi-channel pressure data set with a unified time base, the system can compare and analyze the data of each channel within the same time frame, simplifying the complexity of data processing and improving the efficiency and accuracy of data processing.

[0056] Furthermore, the cubic spline interpolation process is specifically as follows:

[0057] For the blank intervals of cross-period data, valid sampling points in adjacent time windows are extracted as interpolation nodes; and each interpolation interval contains at least 4 valid data points, and the valid data points contain at least the previous and next cycle data;

[0058] The natural boundary conditions are set to force the second-order derivatives of the interpolation curve at the first and last nodes to be zero, and a continuity equation system represented by a tridiagonal matrix is ​​constructed based on the node pressure values ​​and time stamp intervals;

[0059] The Thomas algorithm is used to solve the tridiagonal equations and calculate the cubic polynomial coefficients of each subinterval. The interpolation function expression is:

[0060] S i (t) = a i (tt i ) 3 +b i (tt i ) 2 +c i (tt i )+d i (t i ≤t<t i+1 )

[0061] Among them, ai, bi, ci and di are the polynomial coefficients of the ith subinterval, which are determined by the node pressure value and the derivative continuity condition;

[0062] After completing the calculation of the cubic polynomial coefficients of each sub-interval, the interpolation functions of each sub-interval are integrated to obtain a complete interpolation curve for the entire cross-period data blank interval.

[0063] In this embodiment, by extracting valid sampling points in adjacent time windows as interpolation nodes and ensuring that each interpolation interval contains at least 4 valid data points and covers the data of the previous and next cycles, the interpolation process can fully consider the temporal and spatial correlation of the data, avoid information loss due to missing data, make the interpolation results closer to the changing trend of the actual data, and thus improve the accuracy of the data.

[0064] At the same time, setting natural boundary conditions and forcing the second-order derivative of the interpolation curve at the first and last nodes to be zero can avoid unreasonable fluctuations in the interpolation function at the boundary. Constraining the curvature of the interpolation curve to maintain a smooth transition at the boundary reduces the error caused by the boundary effect and improves the accuracy of the entire interpolation interval. The polynomial coefficients of each sub-interval are determined by the derivative continuity condition, which further ensures the smooth transition of the interpolation function at the connection point.

[0065] In one embodiment, before the interpolation calculation, the interpolation allowable range is set; when the pressure gradient of adjacent nodes exceeds the preset safety range (such as ±10% FS / ms), it automatically switches to the linear interpolation mode.

[0066] Furthermore, the preset interpolation allowable range P S Specifically: Through formula (1) PS =K×(P0+ΔP v +ΔP m )+ΔP f Calculated;

[0067] Where P0 is the basic pressure value generated by the weight of the carrier; ΔP v is the pressure increment generated when the carrier speed increases from the initial speed 0 to the normal operating speed 1, ΔP m It is the additional pressure exerted by the material on the carrier plate.

[0068] In one embodiment, the pressure and state monitoring system is integrated with a synchronization accuracy self-diagnosis module for automatically triggering an emergency synchronization mode when it is detected that a clock deviation of a sensor exceeds a preset threshold.

[0069] The emergency synchronization mode is set in a dual timestamp mode, and the dual timestamp mode is specifically: the original sampling timestamp and the compensated timestamp are synchronously encapsulated.

[0070] In this embodiment, by setting up a synchronization accuracy self-diagnosis module, the pressure and state monitoring system can accurately monitor the clock deviation of each sensor in real time and autonomously. Once it is found that the clock deviation of a sensor exceeds the preset safety threshold range, the emergency synchronization mode will be automatically turned on immediately, which improves the immediacy and automation of the system in dealing with clock deviation problems, effectively avoids potential risks caused by delays or negligence of manual intervention, and ensures that the system can always maintain a high degree of accuracy and reliability in a complex and changeable operating environment.

[0071] At the same time, the emergency synchronization mode set up with dual timestamps builds a precise "time bridge" for the data fusion process, which can effectively align and integrate the data of each channel based on an accurate time reference, significantly reducing data errors and confusion caused by time asynchrony, so that the final generated multi-channel pressure data set can more realistically and accurately reflect the pressure changes of the hydraulic system during the entire operating cycle.

[0072] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, device, article or electronic control system for a hydraulic system of an aerial work platform including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, device, article or electronic control system for a hydraulic system of an aerial work platform. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, device, article or electronic control system for a hydraulic system of an aerial work platform including the element.

[0073] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electronic control system for a hydraulic system of an aerial work platform, characterized in that: include: At least two adjacent hydraulic oil circuits, and a pressure and status monitoring system disposed between the two hydraulic oil circuits; The pressure and state monitoring system includes: a pressure monitoring circuit, which is used to collect pressure data in the hydraulic oil circuit in real time and compare and analyze it with the preset normal pressure range. When abnormal pressure is detected, the corresponding alarm and protection mechanism are triggered to ensure the safe and stable operation of the hydraulic system; and the overall operation of the hydraulic system is precisely regulated according to the feedback information of the working state of each hydraulic oil circuit; The hydraulic oil circuit includes: an oil outlet located in the hydraulic pump, an oil inlet located in the actuator, and an oil return circuit located between the oil outlet and the oil inlet. The oil outlet is provided with a piezoresistive pressure sensor for accurately measuring the output pressure of the hydraulic oil, which is used as an important basis for judging the working state of the hydraulic pump; the oil inlet is provided with a strain gauge pressure sensor for reflecting the load condition of the actuator by measuring the pressure change in the oil circuit; capacitive pressure sensors are linearly arranged on the oil return circuit for real-time monitoring of the pressure change during the oil return process.

2. The electronic control system for the hydraulic system of an aerial work platform according to claim 1, characterized in that: The piezoresistive pressure sensor, strain gauge pressure sensor and capacitive pressure sensor are set using a timestamp alignment technology and are transmitted to the pressure and state monitoring system via a CAN bus.

3. The electronic control system for the hydraulic system of an aerial work platform according to claim 2, characterized in that: The timestamp alignment technology is a combination of reference clock calibration and period synchronization compensation.

4. The electronic control system for the hydraulic system of an aerial work platform according to claim 3, characterized in that: The reference clock calibration is specifically as follows: S1, the main controller of the pressure and state monitoring system sends a unified reference clock signal to the piezoresistive pressure sensor, the strain gauge pressure sensor and the capacitive pressure sensor through the CAN bus; S2. After receiving the reference clock signal sent out, the piezoresistive pressure sensor, strain gauge pressure sensor and capacitive pressure sensor calibrate their own internal clock modules.

5. The electronic control system for the hydraulic system of an aerial work platform according to claim 3, characterized in that: The periodic synchronization compensation is specifically: S3, the main controller of the pressure and state monitoring system broadcasts a time synchronization frame according to a preset alignment period; S4, after receiving the synchronization frame, the piezoresistive pressure sensor, the strain gauge pressure sensor and the capacitive pressure sensor adjust the offset of the local clock and eliminate the clock cumulative error caused by crystal oscillator drift or ambient temperature change; S5, the main controller broadcasts the synchronous sampling instruction through the CAN bus, and after receiving the instruction, the piezoresistive, strain gauge and capacitive sensors simultaneously start sampling the pressure signal in the next alignment cycle; S6, adding a timestamp to the sampled pressure signal data and encapsulating it into a CAN message; S7. After receiving the multi-sensor data packet through the CAN bus, the main controller performs multi-channel data alignment based on the timestamp.

6. The electronic control system for the hydraulic system of an aerial work platform according to claim 5, characterized in that: The timestamp format adopts IEEE 1588.

7. The electronic control system for the hydraulic system of an aerial work platform according to claim 5, characterized in that: The step S7 specifically includes: using a sliding window algorithm to compensate for the transmission delay difference, performing cubic spline interpolation processing on the cross-cycle data, and finally generating a multi-channel pressure data set with a unified time reference.

8. The electronic control system for the hydraulic system of an aerial work platform according to claim 7, characterized in that: Before interpolation calculation, set the interpolation allowable range; when the pressure gradient of adjacent nodes exceeds the preset safety range (such as ±10% FS / ms), it automatically switches to linear interpolation mode; The preset interpolation allowable range P S Specifically: Through formula (1) P S =K×(P0+ΔP v +ΔP m )+ΔP f Calculated; Where P0 is the basic pressure value generated by the weight of the carrier; ΔP v is the pressure increment generated when the carrier speed increases from the initial speed 0 to the normal operating speed 1, ΔP m It is the additional pressure exerted by the material on the carrier plate.

9. The electronic control system for the hydraulic system of an aerial work platform according to claim 1, characterized in that: The pressure and state monitoring system is integrated with a synchronization accuracy self-diagnosis module, which is used to automatically trigger an emergency synchronization mode when it is detected that the clock deviation of a certain sensor exceeds a preset threshold; The emergency synchronization mode is set in a dual timestamp manner, and the dual timestamp manner is specifically: the original sampling timestamp and the compensated timestamp are synchronously encapsulated.

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