Modular multi-station self-adaptive concrete vibration platform system

Abstract

The invention discloses a modular multi-station self-adaptive concrete vibration platform system. The system is composed of a plurality of independent vibration table top modules capable of being spliced, independent vibration units arranged below the modules, an embedded sensor set and a central controller. The central controller collects concrete state data in real time through a sensor and dynamically and independently adjusts the frequency and amplitude of each vibration unit through a built-in intelligent control algorithm, and self-adaptive closed-loop control is achieved. Simultaneous operation of multiple molds is supported through modular combination, an optimal vibration strategy can be executed according to different concrete proportions and component types, the problems that traditional equipment is poor in flexibility, depends on artificial experience and is insufficient in quality consistency are effectively solved, and the production efficiency, the equipment utilization rate and the component forming quality are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of concrete production technology, specifically relating to a modular multi-station adaptive concrete vibration platform system. Background Technology

[0002] In the field of industrialized construction, concrete vibration tables are key equipment used to compact precast concrete components, eliminate internal air bubbles, and ensure molding strength. Traditional concrete vibration tables are mostly integral fixed tables with non-adjustable dimensions, resulting in poor adaptability when producing molds of different sizes. Large molds require specialized large equipment, while small molds result in a waste of equipment working area, leading to low equipment utilization and production flexibility.

[0003] To improve flexibility, some modular vibration platform solutions have emerged in the prior art. For example, Chinese Patent Publication No. CN112248297A discloses a "combined concrete vibration platform" that adapts to molds of different sizes by splicing multiple independent platforms. However, such solutions are usually just simple combinations of mechanical structures. Their power systems still adopt a centralized drive mode or can only realize the synchronous start and stop and vibration of each module with the same parameters, and cannot perform independent, adaptive and precise control according to the actual state of the concrete material at each work station.

[0004] In actual production, due to differences in mold shape, concrete uniformity, and aggregate distribution, the compaction requirements of different areas of large or complex components are inherently different. The existing modular technology mentioned above lacks a closed-loop sensing and control system for each independent workstation, making it impossible to achieve targeted vibration. It still cannot solve the core problem of uneven overall compaction of components and is still prone to quality defects such as local under-vibration or over-vibration.

[0005] In addition, traditional vibration processes rely heavily on operators' experience to preset vibration parameters, lacking objective, data-based process feedback and quality judgment. This results in poor process repeatability, difficulty in ensuring product quality consistency, and an inability to form an effective production data closed loop for continuous process optimization.

[0006] Therefore, there is a need in this field for a concrete vibration platform system that is not only structurally flexible and combinable, but also capable of completely independent control of each workstation and adaptive intelligent adjustment based on real-time feedback, so as to fundamentally improve the forming quality and production efficiency of components. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a modular multi-station adaptive concrete vibration platform system to adapt to different production needs, realize adaptive vibration control based on real-time data feedback, and intelligently control the vibration process to ensure the consistency and reliability of the forming quality of concrete components.

[0008] A modular multi-station adaptive concrete vibration platform system, characterized in that it includes a modular vibration table unit 6, a vibration unit 5, a sensor group 7, a central controller 1, a mold quick clamping unit 3, and an ultrasonic detection unit 2. The modular vibration table unit 6 is composed of at least two detachably connected independent vibration tables 4 spliced ​​together to form an overall working plane; each of the independent vibration tables 4 is mechanically fastened and electrically connected through a mechanical interlocking structure 8 and an electrical communication interface, forming an expandable working plane that can flexibly adjust the splicing area according to the mold size. The vibration unit 5 is the core of achieving precise zoned control. At least one vibration unit 5 is set under each independent vibration table 4, and each vibration unit 5 is independently electrically connected to the central controller 1. Specifically, each vibration unit 5 is equipped with an independent frequency conversion drive circuit, an independent amplitude adjustment mechanism (such as an adjustable eccentric block vibrator with a servo motor), and an independent control signal channel. At the same time, an independent control loop and timer are established for each vibration unit 5 in the central controller 1. This allows the vibration frequency, amplitude, and duration of each station to be precisely adjusted in real time, dynamically, and without interference, according to the actual state of the concrete. The sensor group 7 is embedded inside each of the independent vibration table 4 and is used to collect the state data of the concrete material on the corresponding module in real time. Preferably, the sensor group 7 includes an acceleration sensor and a pressure sensor, which are evenly distributed along the four corners of each independent vibration table 4. The acceleration sensor is used to monitor the compaction process of the concrete, and the pressure sensor is used to monitor the dynamic pressure changes of the concrete on the table. The signals of the sensor group 7 are transmitted to the central controller 1 through the electrical communication interface between the modules. The mold quick clamping unit 3 includes multiple electric clamping devices distributed around the modular vibration table unit 6, which are electrically connected to the central controller 1 and can operate synchronously under the control of the central controller 1 to quickly and reliably fix the mold placed on the table. Preferably, the electric clamping device is a servo electric cylinder with a rotatable self-centering pressure head at the end, which can adapt to the tilt angle deviation of the mold edge and the clamping force is adjustable. The ultrasonic testing unit 2, as an auxiliary means for system optimization and quality inspection, includes an ultrasonic probe frame that can move along the track and a data analysis module; the ultrasonic probe frame can be moved to the side of any independent vibration table 4 for testing; the data analysis module is used to compare the changes in internal defects of concrete before and after vibration, and feeds the results back to the central controller 1 to optimize the vibration parameter model, so as to realize the system's self-learning and continuous improvement. The central controller 1 is electrically connected to the vibration unit 5, the sensor group 7, the mold quick clamping unit 3, and the ultrasonic detection unit 2, respectively. It is configured to receive concrete state data from the sensor group 7 and detection data from the ultrasonic detection unit 2. Based on this data, it independently generates control commands for each independent vibration unit 5 through a built-in intelligent control algorithm to independently control the vibration parameters of each vibration unit 5, and stops vibration when the concrete reaches the set compaction state. In addition, the central controller 1 is also connected to a human-machine interface to display real-time status and data and support manual operation.

[0009] The beneficial effects of this invention are as follows: The system utilizes at least two detachably connected independent vibration tables to form a unified working plane. Each independent vibration table is mechanically interlocked and electrically connected via an electrical communication interface, creating an expandable working plane that allows for flexible adjustment of the splicing area according to mold size. This eliminates the need for complete equipment replacement, reducing equipment investment costs and adapting to the needs of multi-variety, small-batch production. Through each independent vibration unit and real-time sensing closed-loop control, the frequency and amplitude can be dynamically adjusted according to the compaction state of concrete at different workstations. This avoids insufficient or excessive vibration at some workstations caused by traditional control methods, ensuring good uniformity of strength in multi-workstation components. Furthermore, it eliminates the need for manual real-time adjustment of vibration parameters, reducing reliance on operator experience. Process data is automatically stored, enabling quality traceability. The modular design allows for individual module replacement in case of failure, eliminating the need for system shutdown for maintenance. The system also features a fault warning function, reducing equipment failure rates. Quality closed-loop optimization is achieved through an ultrasonic testing unit, and the network communication module supports access to the factory's Internet of Things (IoT), adapting to the needs of intelligent manufacturing upgrades. Attached Figure Description

[0010] Figure 1 This is a structural schematic diagram of a modular multi-station adaptive concrete vibration platform system according to the present invention; 1-Central control unit; 2-Ultrasonic detection unit; 3-Quick clamping unit; 4-Independent vibration table; 5-Vibration unit; 6-Modular vibration table unit; 7-Sensor group; 8-Mechanical interlocking structure. Detailed Implementation

[0011] like Figure 1 As shown, this embodiment of a modular multi-station adaptive concrete vibration platform system includes: a modular vibration table unit 6, an independent vibration unit 5, a sensor group 7, a central controller 1, a mold quick clamping unit 3, and an ultrasonic detection unit 2. The modular vibration table unit 6 is composed of four independent square vibration tables 4, each 1.5m × 1.5m, spliced ​​together to form a 3m × 3m overall working plane. The independent vibration tables 4 are connected in the following way: the mechanical interlocking structure 8 uses a heavy-duty pin-type connection, with precisely machined trapezoidal grooves and protrusions on the edges of adjacent tables, coupled with high-strength locking pins with a diameter of 40mm, ensuring that the overall flatness error after splicing is less than 0.8mm / m²; the electrical communication interface uses an industrial-grade multi-pin waterproof connector, including a 24V DC power supply line, a CAN bus communication line, and a signal shielding layer, enabling immediate connection and plug-and-play functionality. This structure allows the system to be quickly assembled according to mold dimensions, with a maximum expandable working area of ​​6m × 6m, and the replacement time for a single module does not exceed 15 minutes. Preferably, the frame of the independent vibration table 4 is made of Q345B high-strength steel, the table surface is a 30mm thick wear-resistant steel plate, the surface is treated with anti-rust, and the load-bearing capacity is ≥5t / m²; sealing strips are set between each table surface to prevent concrete slurry from seeping into the connection structure. In the vibration unit 5, one vibration unit 5 is arranged below each independent vibration table surface 4, and the specific configuration is as follows: The inverter adopts an IP55 protection rating, with an output frequency accurate to 0.1Hz, achieving stepless speed regulation within the range of 15-80Hz, forming an independent variable frequency drive circuit; An adjustable eccentric block vibrator driven by a servo motor is used. The servo motor has an accuracy of 0.1°. By changing the relative angle of the eccentric blocks, the amplitude can be precisely controlled from 0.5 to 3.0 mm, forming an independent amplitude adjustment mechanism. Shielded twisted-pair cable is used to transmit control signals, with a signal refresh period of ≤5ms, forming an independent control signal channel; Furthermore, the central controller 1 establishes an independent control loop and a timer with an accuracy of 1ms for each vibration unit 5, so as to realize the millisecond-level dynamic adjustment of the vibration parameters of each station. Preferably, the vibration unit 5 uses a three-phase asynchronous vibration motor with a rated power of 2.2kW and an adjustable excitation force of 0-20kN; the eccentric block adjustment mechanism is equipped with an absolute encoder to ensure amplitude control accuracy of ±0.1mm; The sensor group 7 is embedded inside each independent vibration table 4. The specific configuration includes: accelerometer: an ICP type triaxial accelerometer with a range of ±50g, a frequency response of 1-5000Hz, a sampling rate of 10kHz, evenly distributed along the four corners of each table with a spacing error of less than 2mm; pressure sensor: a strain gauge pressure sensor with a range of 0-100kPa, an accuracy of ±0.5% FS, and a total of 4 measuring points. Furthermore, the sensor signals are filtered using digital filtering technology to eliminate interference and ensure the accuracy of data acquisition, with a sampling period of 10ms. Preferably, sensor group 7 also includes a temperature sensor to monitor the effect of concrete temperature changes on vibration effect, and all sensor data are transmitted to central controller 1 via RS485 bus; The mold quick clamping unit 3 includes a clamping device driven by eight servo electric cylinders, with the following specific parameters: Servo electric cylinder: rated thrust 4kN, stroke 150mm, repeatability ±0.05mm; self-centering pressure head: adopts ball joint connection structure, swing angle ±10°, adaptable to mold edges with different inclination angles; clamping force control range 1-4kN, control accuracy ±1%, response time <50ms; all clamping points are synchronously controlled through PROFIBUS-DP bus, clamping time <8s.

[0012] The ultrasonic testing unit 2, serving as an auxiliary means for system optimization and quality inspection, includes an ultrasonic probe holder that can move along a track and a data analysis module. The ultrasonic probe holder can be moved to the side of any independent vibration table 4 for testing. The data analysis module is used to compare the changes in internal defects of the concrete before and after vibration and feeds the results back to the central controller 1 for optimizing the vibration parameter model. The specific configuration of the ultrasonic testing unit 2 includes: using a servo motor to drive movement along a U-shaped channel steel track, with an adjustable movement speed of 0.2-0.8 m / s and a positioning accuracy of ±1 mm; using a high-frequency probe with a center frequency of 2 MHz, a bandwidth of 1-5 MHz, and a detection depth of 0-600 mm; and the data analysis module is configured to use a wavelet transform algorithm to process ultrasonic signals, capable of identifying pore defects with a diameter ≥2 mm. As a preferred option, the probe holder is equipped with an automatic lifting mechanism, covering the full height of the component in the detection range, and has limit switches and mechanical stops at both ends to ensure safe operation. The central controller 1 adopts an integrated platform of industrial-grade PLC and industrial computer, equipped with digital I / O modules and analog input modules; the intelligent control algorithm built into the central controller 1 independently generates control commands for each independent vibration unit 5 according to the following process: a. Input variable acquisition: For each independent vibration unit 5, the acceleration signal amplitude attenuation rate α and pressure signal stability value P fed back by its corresponding sensor group 7 are acquired in real time; b. Compaction Deviation Calculation: Based on the acceleration signal amplitude attenuation rate α and the pressure signal stability value P, the real-time compaction value Mc of the current concrete is calculated by querying the pre-stored compaction mapping table; then, the deviation e between the real-time compaction value Mc and the preset target compaction threshold Mt, and the rate of change ec of the deviation e over time are calculated. c. Fuzzy reasoning: The deviation e and the rate of change of deviation ec are used as input variables and mapped to their corresponding fuzzy sets respectively. By querying the predefined fuzzy rule base, the fuzzy values ​​of the output variables vibration frequency adjustment amount ΔF and vibration amplitude adjustment amount ΔA are obtained. d. Defuzzification and command output: The obtained fuzzy output quantities ΔF and ΔA are converted into precise control quantities through the centroid method defuzzification algorithm, and combined with the preset vibration duration parameters to generate specific control commands containing the target frequency, target amplitude and duration of action; e. Independent command issuance: The specific control commands are issued to the driver of the corresponding independent vibration unit 5 through an independent communication channel to drive it to perform vibration actions; The human-machine interface displays real-time vibration parameters, sensor data curves, equipment status alarms, and other information for each workstation. Specifically, the control unit presets a concrete target density of ≥95%, a vibration frequency reference value of 30-50Hz, and an amplitude reference value of 1.5-2.5mm. The data acquisition module receives signals from each sensor group 7 in real time, with a control cycle of 20ms. Furthermore, when the compaction progress of a certain workstation is slow (e.g., target 95%, actual measurement 85%), a control signal is output through a fuzzy control algorithm to increase the vibration frequency from 35Hz to 45Hz and the amplitude from 1.8mm to 2.2mm. At the same time, the vibration status of adjacent workstations is monitored to avoid resonance interference. Furthermore, when the density reaches 93%, it automatically enters a fine vibration mode, with the frequency reduced to 25Hz and the amplitude reduced to 1.0mm to avoid excessive vibration that could cause aggregate segregation. In the modular multi-station adaptive concrete vibration platform system, based on multi-sensor fusion technology, accurate identification of the concrete compaction state is achieved. Specifically, the state monitoring function mainly relies on the collaborative operation of the acceleration and pressure sensors in sensor group 7. Its working principle and judgment logic are as follows: After each change in concrete mix proportion, the system automatically learns the optimal vibration parameter curve under the current mix proportion during vibration testing, recording the acceleration characteristic value and pressure stability value when the compaction reaches 95%. The control unit compares the readings of each sensor with the reference value in real time. Density assessment: When the acceleration signal amplitude attenuation rate is ≤5% / s and the pressure fluctuation value is ≤2%, the density standard is met. Through the protection mechanism, under the following conditions: Condition 1: The real-time density estimate calculated based on sensor data reaches or exceeds the set target density threshold; Condition 2: The total vibration duration reaches the set maximum vibration time T. Regardless of whether Condition 1 is met, the vibration will stop and an alarm will be triggered to prompt the operator to intervene. Once either termination condition is met, the central controller 1 will immediately send a stop command to the vibration unit 5. As a preferred option, the system is equipped with a vibration history database to store vibration parameters and effect data for each operation, and continuously optimizes the control rules through machine learning algorithms.

[0013] In summary, this embodiment achieves stable operation of a modular multi-station adaptive concrete vibration platform through clear component selection, rigorous structural design, and precise control logic. This invention not only improves equipment adaptability through modular design but also achieves independent and precise vibration at each station through intelligent control. This solves the problem of poor uniformity in traditional vibration platforms and meets the high requirements for quality consistency in modern precast concrete components, demonstrating significant technological advancement and widespread application value.

[0014] Example

[0015] This embodiment is used for the fabrication of C30 concrete blocks using a modular multi-station adaptive concrete vibration platform system. Specific implementation details include: The component to be produced is C30 concrete block. The operator selects the "C30 block standard formula" from the pre-stored formula library in the human-machine interface of the central controller 1: target density threshold 98%, maximum vibration time 80s, initial vibration parameter set is frequency 50Hz, amplitude 0.3mm; the central controller 1 identifies the size of the tray loading the block mold through the infrared positioning sensor built into the table, automatically determines that the mold covers the independent vibration table 4, and then sends an activation command to this module, shuts down the power supply circuit of the other uncovered modules, and assigns an independent vibration task number (M1-M4) to each activated module.

[0016] The operator precisely places the block mold loaded with C30 concrete onto the four activated vibration table modules 4, aligning the edge of the mold with the positioning scale line on the table. The central controller 1 sends synchronous action commands to the eight electric clamping devices 3 distributed around the table unit. The self-centering pressure head of the clamping device rotates to fit against the edge of the mold and advances at a speed of 0.5m / s. When the pressure sensor 7 detects that the clamping force reaches 3kN, it sends back a "clamping in place" signal. After receiving the in place signals from all clamping devices, the central controller 1 sends a start command to the independent vibration unit 5 below the activation module after a 2s delay. Each vibration unit 5 starts vibrating with initial parameters (50Hz, 0.3mm).

[0017] Each activation module 4 has an embedded sensor group 7 that continuously collects data at a frequency of 0.5s / time. The accelerometer monitors the change in compaction displacement during concrete vibration, and the pressure sensor monitors the dynamic pressure fluctuations of the concrete on the platform. The central controller 1 preprocesses the collected raw data: it filters out power grid interference signals through a 50Hz low-pass filter and smooths the pressure data using a moving average method. Subsequently, feature extraction is performed to obtain the amplitude attenuation rate and frequency component changes of the acceleration signal, as well as the stable value of the pressure signal and the rate at which it reaches the stable value.

[0018] The central controller 1 inputs the extracted real-time feature data into the built-in fuzzy control algorithm, which pre-stores a C30 concrete density model. The algorithm compares the real-time acceleration amplitude decay rate and pressure stability value with the "density compliance characteristic threshold" in the model to calculate the deviation between the current density state and the target state. Based on the deviation, the algorithm generates new control commands: increase the vibration frequency of modules M1-M3 to 52Hz, and maintain the amplitude at 0.3mm; increase the frequency of module M4 to 53Hz and increase the amplitude to 0.32mm because the pressure stability value is slightly lower (30kPa). The adjustment commands are sent to each vibration unit 5 in real time through the communication interface. Vibration unit 5 completes parameter switching within 1 second. Then, sensor 7 continues to collect data, and the algorithm repeats the above comparison and adjustment process to form a closed-loop feedback until the vibration terminates. When the vibration lasted for 65 seconds, sensor 7 data showed that the acceleration amplitude attenuation rate of modules M1-M3 reached 18%, the pressure stability value was 34 kPa, and the algorithm calculated the real-time compactness to be 98.5%, reaching the target compactness threshold; the acceleration amplitude attenuation rate of module M4 was 17%, the pressure stability value was 33 kPa, and the compactness was 98.2%, also meeting the standard; the central controller 1 determined that all activated modules met "condition one" and immediately sent a stop command to the four vibration units 5, and the vibration units 5 stopped operating within 0.5 seconds; if sensor 7 malfunctioned during the vibration process and the central controller 1 did not receive valid data, when the vibration duration reached 80 seconds, "condition two" would be triggered, the vibration would stop, and an alarm "sensor malfunction, manual inspection required" would be displayed through the human-machine interface, while a continuous audible and visual alarm would be issued; After the vibration ends, the system automatically stores the vibration data in the local database. The recorded content includes: vibration task number, vibration parameter change curves of each module, raw data from sensor 7, density calculation results, vibration duration, and the result label of "density meets standard". The machine learning algorithm of the central controller 1 automatically retrieves the vibration data of all C30 blocks produced in the week, retrains the density prediction model, and adjusts the mapping coefficients between acceleration, pressure characteristics and density in the model. After training, the density error of the model is reduced and the adaptive capability is improved.

[0019] Central controller 1 sends a command to ultrasonic testing unit 2. The ultrasonic probe holder moves along a U-shaped track at a speed of 0.5 m / s to the side of vibration modules 4 (M1-M4). The high-frequency probe scans the entire height of the blocks at 40 mm intervals, collecting internal defect data for each block. After processing by the data analysis module, a test report is generated: blocks M1-M3 have no internal pores (qualified); block M4 has a pore with a diameter of 3.2 mm at a height of 120 mm, and the vibration period of the corresponding M4 module is marked as 30-40 seconds, with the associated vibration parameter sequence being a frequency of 52 Hz and an amplitude of 0.3 mm. Central controller 1 retrieves the vibration parameters of module M4 for 30-40 seconds and the data from sensor 7, determining that the defect is caused by under-vibration. It then adjusts the frequency adjustment coefficient of the C30 concrete under-vibration scenario in the fuzzy control algorithm from 1.05 times to 1.1 times. Since the current batch of C30 blocks is still in production, central controller 1 immediately generates M4... The module vibration parameter fine-tuning command is transmitted to the independent vibration unit 5 of the M4 module through the electrical communication interface; the independent vibration unit 5 completes frequency switching within 0.8s and feeds back the adjustment signal. The M4 module blocks produced subsequently are ultrasonically tested 2, and the pore diameter is all <2mm, and the defect rate is reduced to 0.

[0020] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A modular multi-station adaptive concrete vibration platform system, characterized by, The vibration table surface unit (6) is composed of at least two detachably connected independent vibration table surfaces (4) and forms an overall working plane. The vibration unit (5) is arranged below each independent vibration table surface (4) and is provided with an independent variable frequency drive circuit, an independent amplitude adjusting mechanism and an independent control signal channel. The sensor group (7) is embedded in each independent vibration table surface module and is used for collecting state data of the concrete material on the corresponding module and feeding the data back to the central controller (1). The central controller (1) is electrically connected with the vibration unit (5), the sensor group (7), the mold quick clamping unit and the ultrasonic detection unit (2) and is configured to receive the concrete state data from the sensor group (7) and the detection data from the ultrasonic detection unit (2), independently generate a control instruction of each independent vibration unit based on the detection data, control the vibration parameters of each independent vibration unit and stop the vibration when the concrete reaches a set compactness. The ultrasonic detection unit (2) comprises an ultrasonic probe frame movable along a track and a data analysis module. The independent vibration table surface module is spliced through a detachable connection mechanism and is used for forming an expandable working plane module. The sensor group comprises acceleration sensors and pressure sensors and is uniformly distributed along the four corners of each independent vibration table surface module.

2. The modular multi-station self-adaptive concrete vibration platform system of claim 1, wherein, The intelligent control algorithm in the central controller (1) is a fuzzy control algorithm and is pre-stored with a compactness model matched with different concrete mix ratios.

3. The modular multi-station self-adapting concrete vibration platform system of claim 1, wherein, ​ 4. The modular multi-station self-adapting concrete vibration platform system of claim 1, wherein, ​ 5. The modular multi-station self-adapting concrete vibration platform system of claim 1, wherein, The central controller is also connected to a human-machine interface for displaying real-time working status of each independent vibration table module, sensor raw data and parameter adjustment suggestions, while supporting manual selection and input of vibration formula by operators.

6. The modular multi-station self-adapting concrete vibration platform system of claim 1, wherein, In the mold quick clamping unit (3), the electric clamping device is a servo electric cylinder, and a rotatable self-centering pressure head is mounted at the tail end; the self-centering pressure head can rotate around the gimbal at an angle, which is used to adapt to the inclination deviation of the edge of the mold; the clamping force adjustment range of the electric clamping device is 1-5kN, and when the pressure sensor detects that the clamping force reaches the set value, a feedback signal is fed back to the central controller.

7. The modular multi-station self-adapting concrete vibration platform system of claim 1, wherein, In the ultrasonic detection unit, the track is a U-shaped channel steel track, the top surface of the track is 1.2-1.5m away from the ground, the moving speed of the ultrasonic probe holder is 0.1-1m / s, and limit switches are arranged at both ends of the track to prevent overtravel; the ultrasonic probe on the ultrasonic probe holder is a high-frequency probe, and the detection range covers the full height of the independent vibration table module.

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