A metrological verification and calibration device for a fully automatic permeability tester

Abstract

This utility model relates to the field of permeability testing equipment calibration technology, specifically a metrological verification and calibration device for a fully automatic permeability tester. It includes a control module and a test mold matched with the permeability tester. The test mold includes a test mold base and a test mold sleeve mounted on the test mold base. A camera and a light source are provided on the side of the test mold sleeve opposite to the test mold base. A water spray nozzle penetrating both the inside and outside is provided on the upper side wall of the test mold sleeve. A nozzle with an inclined downward end is provided at the internal water spray nozzle of the test mold sleeve. The nozzle is connected to an external water inlet valve, and a flow-damping element is provided at the outlet of the nozzle. A solenoid valve for controlling the dripping water from the nozzle is also provided at the external water spray nozzle of the test mold sleeve. By providing a dripping nozzle inside the test mold sleeve, the specimen can actively reach a state that triggers the image recognition system to identify and alarm, thereby verifying whether the permeability tester's image recognition system can recognize it. The response speed of the image recognition system is reflected through the timing function of the timer control module.

Description

Technical Field

[0001] This utility model relates to the field of permeability testing equipment calibration technology, specifically a metrological verification and calibration device for a fully automatic permeability testing instrument. Background Technology

[0002] Concrete plays a decisive role in ensuring the structural safety and service life of buildings. The impermeability of concrete refers to its ability to resist the penetration of water and other liquid media under pressure. Fully automatic concrete permeability analyzers, with their technological advantage of determining concrete leakage time through sensors, have become important testing equipment. The accuracy of concrete permeability analyzer data directly affects the project quality assessment results. However, the following problems also exist:

[0003] 1. Systemic risks inherent in manual inspection: Traditional manual inspection relies on visual observation of leakage phenomena, which is prone to misjudgment due to fatigue or operational differences. For example, concrete impermeability tests require continuous observation for more than 8 hours, and manual recording may result in omissions of time points or misjudgments of the seepage status; paper records are easily modified, and inconsistencies may occur between calibration report data and original records.

[0004] 2. Intelligent equipment requires supporting verification mechanisms: Although fully automatic anti-permeability instruments achieve automatic pressurization, leakage detection, and data uploading functions, the reliability of the equipment still depends on rigorous verification. For example, the accuracy of pressure sensors needs to be calibrated regularly, otherwise it may lead to misjudgment of the anti-permeability level; if the AI ​​prediction model has insufficient training data, it may misdiagnose sealing failure or abnormal pressure curves.

[0005] 3. Industry regulatory requirements for data traceability: As core evidence in engineering quality disputes, test reports must ensure a complete traceability chain from original records to the final report. Differences in data interfaces between different manufacturers' equipment necessitate the use of third-party calibration tools to achieve data interoperability verification.

[0006] The relevant standards and specifications to date include: JG / T249 "Concrete Permeability Tester" issued by the Ministry of Housing and Urban-Rural Development in April 2009; SL133-2014 "Calibration Method for Concrete Permeability Tester" issued by the Ministry of Water Resources in October 2014; JJG (Guangdong) 051-2017 "Verification Procedure for Concrete Permeability Tester" issued by the Guangdong Provincial Bureau of Quality and Technical Supervision in October 2017; JJF1812-2020 "Calibration Specification for Concrete Permeability Tester" issued by the State Administration for Market Regulation in January 2020; JJG (Transportation) 188-2023 "Verification Procedure for Permeability Tester" issued by the Ministry of Transport in November 2023; and T / CECS. There are several related technical standards, calibration and verification procedures for 10265-2023 "Concrete Water Permeability Meter". However, the above standards and metrological calibration verification cannot meet the verification or calibration requirements of fully automatic water permeability meters. These documents do not fully consider the technical characteristics of fully automatic water permeability meters. Fully automatic water permeability meters determine the concrete permeation time through different sensors, but there are no relevant verification and calibration technical standards for these sensors. In other words, the time data detected by these sensors without metrological calibration is unreliable, making it difficult to guarantee the reliability and accuracy of the instrument's test results, which seriously affects the judgment indicators of concrete water permeability performance testing.

[0007] In summary, testing and calibrating antipermeability analyzers to ensure the accuracy and reliability of their output results is a current industry need and fills a market gap in metrology calibration, effectively addressing key metrology issues in industrial development. Utility Model Content

[0008] To address the aforementioned problems, this utility model provides a metrological verification and calibration device for a fully automatic permeability tester, which solves the metrological verification and calibration problem of this type of equipment.

[0009] The technical solution adopted by this utility model to solve its technical problem is: a metrological verification and calibration device for a fully automatic permeability tester, including a control module and a test mold matched with the permeability tester. The test mold includes a test mold base and a test mold sleeve set on the test mold base. A camera and a light source are provided on the side of the test mold sleeve opposite to the test mold base. A water spray nozzle penetrating inside and outside is provided on the upper side wall of the test mold sleeve. A nozzle with an inclined downward end is provided at the water spray nozzle inside the test mold sleeve. The nozzle is connected to an external water inlet valve and a flow-slowing element is provided at the water outlet of the nozzle. A solenoid valve for controlling the dripping of the nozzle is also provided at the water spray nozzle outside the test mold sleeve.

[0010] As an optimization, the control module includes a solenoid valve control module, an alarm signal monitoring module, and a timer control module.

[0011] As an optimization, the flow-slowing component includes a connecting section and a flow-slowing section. The inner wall of the connecting section is provided with an internal thread for connecting to the nozzle. The flow-slowing section is an inverted conical cavity and has a stop block inside that is opposite to the nozzle.

[0012] As an optimization, the inner wall of the slow-flow section is provided with several evenly distributed guide grooves, and several evenly distributed connecting columns are provided between the baffle and the slow-flow section.

[0013] As an optimization, the side of the stop block facing the nozzle is provided with a V-shaped groove.

[0014] As an optimization, the outer wall of the nozzle is provided with external threads that mate with the connecting section.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a fully automatic metrological verification and calibration device for a concrete permeability tester. By installing a dripping nozzle inside the test mold, the permeability on the specimen surface quickly reaches the threshold triggering an alarm by the permeability detection system. Timing begins when the solenoid valve of the designated test mold starts dripping water; timing stops when the permeability detection system detects an alarm. The permeability detection performance of the tester is determined by the time difference between the dripping time and the alarm time. This utility model facilitates the implementation of metrological verification and calibration services for concrete permeability testers based on permeability detection, shortens the process, improves efficiency, and enhances reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the prototype mold of this utility model;

[0017] Figure 2 This is a schematic diagram of the nozzle structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the flow-retarding component structure of this utility model;

[0019] Figure 4 This is a flowchart of the metrological verification and calibration method of this utility model.

[0020] The components are: 1. Trial mold base, 2. Trial mold sleeve, 3. Nozzle, 4. Solenoid valve, 5. Flow buffer, 6. Connecting section, 7. Flow buffer section, 8. Baffle, 9. Flow guide groove, 10. Connecting column, 11. V-shaped groove. Detailed Implementation

[0021] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] For ease of description, the words "up," "down," "left," and "right" appearing in this utility model only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] like Figure 1-4 As shown, a metrological verification and calibration device for a fully automatic permeability tester includes a control module and a test mold matched with the permeability tester. The test mold includes a test mold base 1 and a test mold sleeve 2 disposed on the test mold base 1. A camera and a light source are provided on the side of the test mold sleeve 2 opposite to the test mold base 1. A water spray nozzle penetrating inside and outside is provided on the upper side wall of the test mold sleeve 2. A nozzle 3 with its end tilted downward is provided at the water spray nozzle inside the test mold sleeve 2. The nozzle 3 is connected to an external water pipe and a flow-slowing element 5 is provided at the outlet of the nozzle 3. A solenoid valve 4 for controlling the dripping of the nozzle 3 is provided at the water spray nozzle outside the test mold sleeve 2.

[0025] The control module, integrated within the controller, includes a solenoid valve control module, an alarm signal monitoring module, and a timer control module. The control module can display the dripping time, alarm time, and time difference for multiple test molds; it can set the dripping duration; and it can export test data. The timer control module can control the dripping timing at any time, accelerating the verification process and improving efficiency; it can set a timeout period to verify if the image recognition system fails to report or misses an alarm; it can control the holding time after opening the solenoid valve, thereby controlling the size of the seepage area; it is used to verify the threshold for triggering alarms in the image recognition system; and it can control the simultaneous operation of the solenoid valves of multiple test molds, enabling simultaneous dripping and timing, and monitoring the response time of the image recognition system for multiple test pieces. The solenoid valve control module can control the opening and closing of multiple solenoid valves; and the alarm signal monitoring module can monitor the seepage alarm signal output by the image recognition system of the permeability analyzer. In this preferred embodiment, six test pieces are simultaneously calibrated. The timing accuracy of the control module's timer is 0.1 seconds, and the image recognition system can be set to a seepage area accuracy of 1 square millimeter, making the detection more accurate and efficient.

[0026] To prevent water droplets from splashing onto the camera and affecting the shooting effect during water intake, a flow-damping component 5 is provided. The flow-damping component 5 includes a connecting section 6 and a flow-damping section 7. For easy disassembly and installation, the inner wall of the connecting section 6 has internal threads for connection with the nozzle 3, and the outer wall of the nozzle 3 has external threads for mating with the connecting section 6. To slow the water flow rate, the flow-damping section 7 is an inverted conical cavity with a baffle 8 inside that faces the nozzle 3. The inner wall of the flow-damping section 7 has several evenly distributed guide grooves 9. Several evenly distributed connecting posts 10 connect the baffle 8 and the flow-damping section 7. The side of the baffle 8 facing the nozzle 3 has a V-shaped groove 11. When water flows out of the nozzle 3, it sprays into the V-shaped groove 11 and then reflects into the guide grooves 9 on the inner wall of the flow-damping section 7 before flowing out. Because the flow-damping section 7 is inverted conical, the water concentrates towards the center and does not splash.

[0027] When verifying and calibrating the accuracy of the permeability testing instrument in detecting water seepage, first place the specimen into the mold and install it on the permeability instrument:

[0028] Step 1: Start the permeability testing instrument and activate the timing monitoring system;

[0029] Step two: Start the test to bring the image recognition system into normal detection mode;

[0030] Step 3: Using the timer control module, control the solenoid valve on the designated mold to drip water onto the surface of the specimen to start the timer;

[0031] Step four: The timer control module automatically detects the water seepage alarm signal output by the image recognition system;

[0032] Step 5: The timer control module automatically detects whether the timeout has expired and no leakage alarm signal has been output.

[0033] Step six: If an alarm signal is detected, or the waiting time exceeds the limit, stop the timing; save the duration of the dripping time and the alarm time to determine the seepage detection performance of the anti-seepage instrument.

[0034] The above-described specific embodiments are merely specific examples of this utility model. The patent protection scope of this utility model includes, but is not limited to, the product form and style of the above-described specific embodiments. Any appropriate changes or modifications made by a person skilled in the art that conform to the claims of this utility model should fall within the patent protection scope of this utility model.

Claims

1. A full-automatic impermeameter metrological verification and calibration device, characterized in that: The device includes a control module and a test mold matched with the permeability tester. The test mold includes a test mold base and a test mold sleeve mounted on the test mold base. A camera and a light source are provided on the side of the test mold sleeve opposite to the test mold base. A water spray nozzle penetrating inside and outside is provided on the upper side wall of the test mold sleeve. A nozzle with an inclined downward end is provided at the water spray nozzle inside the test mold sleeve. The nozzle is connected to an external water inlet valve and a flow-slowing element is provided at the outlet of the nozzle. A solenoid valve for controlling the dripping of the nozzle is also provided at the water spray nozzle outside the test mold sleeve.

2. The device for metrological verification and calibration of fully automatic impermeabilimeter according to claim 1, characterized in that: The flow-slowing component includes a connecting section and a flow-slowing section. The inner wall of the connecting section is provided with an internal thread for connecting to the nozzle. The flow-slowing section is an inverted conical cavity and has a stop block inside that is opposite to the nozzle.

3. The device for metrological verification and calibration of fully automatic impermeabilimeter according to claim 2, characterized in that: The inner wall of the slow-flow section is provided with several evenly distributed guide grooves, and several evenly distributed connecting columns are provided between the baffle and the slow-flow section.

4. The device for metrological verification and calibration of fully automatic impermeabilimeter according to claim 3, characterized in that: The side of the stop block facing the nozzle has a V-shaped groove.

5. The automatic permeability apparatus of claim 2, wherein: The nozzle has an external thread on its outer wall that mates with the connecting section.

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