Fabric water-permeability resistance hydrostatic pressure tester as well as control system and testing method thereof

Abstract

The invention provides a fabric water-permeability resistance hydrostatic pressure tester and a control system and a testing method thereof, which relate to the technical field of mechanical and electronic control, and aim to solve the problems of large structure, high noise and small application range of an existing tester. The fabric water-permeability resistance hydrostatic pressure tester comprises a pressurization water tank, a clamping mechanism, a pressurization / pressure reduction mechanism and a water storage tank, wherein the clamping mechanism and the pressurization water tank are matched for clamping fabrics; the pressurization / pressure reduction mechanism is arranged between the bottom surface of the pressurization water tank and the water storage tank, and the water storage tank is positioned below the pressurization water tank. The control system comprises a display unit, a control module, a clamping control unit, a pressure signal acquisition unit, a water inflow / outflow control unit and a controller. The control method is used for accomplishing the control on clamping, pressure regulating water inflow and outflow and the like of the tester through the control system, and the tester has the characteristics of simple and compact structure, low noise, high efficiency, wide application and the like.

Description

technical field [0001] The invention relates to a fabric water resistance test, in particular to a fabric water resistance hydrostatic pressure tester, a control system for controlling the fabric water resistance hydrostatic pressure tester and the fabric water resistance hydrostatic pressure tester test method. Background technique [0002] The hydrostatic pressure test of fabric water permeability is a kind of resistance to water penetrating through the fabric, which is expressed by the hydrostatic pressure of the fabric. Under standard atmospheric conditions, one side of the sample is subjected to a continuously rising water pressure until there are three water seepages, and the pressure value at this time is recorded as the hydrostatic pressure. The greater the hydrostatic pressure a fabric can withstand, the better it is waterproof or impermeable. The water pressure for the test can be applied from above or below the specimen. [0003] The water impermeability of fab...

AI Technical Summary

Problems solved by technology

Although the volume of the device has been reduced, the volume of the cylindrical bellows driven by a stepping motor is still relatively large, and there are the following disadvantages: ①The special structure of the bellows forms a water storage structure, and its processing is complicated; ②The bellows is injected with water. A seal must be formed between the upper rear end and the stepping motor, and it is difficult to process the bellows into a sealing structure and the sealing performance is poor. Therefore, it is difficult to quickly increase the pressure value when testing fabrics with high hydrostatic pressure values, and it may even be impossible to achieve static pressure due to water leakage. Pressure value; ③The sealing structure of the telescopic principle used in the bellows work, the injected pressurized water can only be the water capacity in the cylindrical bellows, so the maximum hydrostatic pressure is directly limited, and the hydrostatic pressure cannot be adjusted. In this case If the fabric to be tested has good elasticity, the final hydrostatic pressure value cannot be detected due to insufficient pressurized water pressure injected, so the detection range is small; ④The connection between the stepper motor and the bellows is difficult and the structure is complicated; ⑤Because When the torque of the stepping motor is not large enough or the pulse frequency is higher than the no-load starting frequency, there will be a whistling phenomenon; at low frequencies, vibration will occur, so the noise is large and the vibration is serious, which affects the test results of the sensor, resulting in hydrostatic pressure. ⑥The sensor is installed on the upper end of the cylindrical metal bellows, and the cylindrical metal bellows is compressed downward under the drive of the motor, the compressed water surface has been separated from the detection of the sensor and the pressure value cannot be detected ;⑦ The pipe fittings connected to the bellows are pressure output hoses. When the structure is pressurized, the hose is deformed under pressure and the pressure is divided, so the stability of the hydrostatic pressure is poor and the cost is increased.

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