CN105807173A - Rain test chamber with precision water dropping control function - Google Patents
Rain test chamber with precision water dropping control function Download PDFInfo
- Publication number
- CN105807173A CN105807173A CN201610402135.XA CN201610402135A CN105807173A CN 105807173 A CN105807173 A CN 105807173A CN 201610402135 A CN201610402135 A CN 201610402135A CN 105807173 A CN105807173 A CN 105807173A
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- water
- tank
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- test chamber
- dripping
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a control system with a precision water dropping control function for a rain test chamber. The pressures of a water tank is controlled, so that water is not dropped when replenished, is uniform in volume when dropped and stops from being dropped by water dropping nozzles when water dropping is terminated. The control system is characterized in that pressure signals of the water tank are acquired by a pressure sensor and are fed to the control system, and control signals are outputted by the control system, so that the internal pressures of the water tank can be regulated and keep constant; resistance of the water dropping nozzles is fixed, and only the pressures need to be changed, so that the water dropping volumes can be precisely controlled. Compared with the prior art, the control system has the advantages that the water dropping rate of the rain test chamber can reach 98% at least; the water only starts to be dropped after the water is replenished and reaches specified water level, the control system comprises electronic water level sensors, the water level precision is +/-0.5 mm, the water pressures are subjected to PID (proportion, integration and differentiation) closed-loop control, accordingly, the rain test chamber is good in the water dropping consistency in integral procedures, and problems of unstable water dropping volumes and influence on water dropping speeds can be solved; the water is no longer dropped by the water dropping nozzles after water dropping tests are terminated; IEC-60529, GB-4208 and DIN-40050 test regulatory requirements can be met by the water dropping rate of the rain test chamber.
Description
Technical field
The present invention relates to a kind of rain test chamber, be specifically related to a kind of accurate rain test chamber controlled that drips.Method of testing with reference to IPx1 and IPx2 in testing standard IEC-60529, GB-4208, DIN-40050.
Background technology
Drench with rainProof box canSimulation electronic product and components and parts thereof are at various environment such as the trickle transported and may be subject to during use and spray tests, to reach to detect the water resistance of various product, it is adaptable to fields such as electronics, electrical equipment, communication, electrical category product and automobile lamp shell protections.General, content specify according to method of testings such as IEC-60529, GB-4208, DIN-40050 of rain test chamber is designed production；The test grade of rain test chamber is from IPx1 to IPx9K, and the highest grade waterproof ability is the strongest.
Dripping device (IPx1, IPx2) the most on the market is the simplest and the crudest, typically by moisturizing motor, defecator, water level switch and a water tank being covered with gargoyle are constituted, and the rate of dripping of its gargoyle is less than 60%, process of dripping is uncontrolled, the amount of dripping can not meet (IPx1 1mm/min,IPx2
3mm/min) test request.During toward water tank with water, begin to drip.Test period terminates can not stop dripping.In the work process of testing machine, the amount of dripping concordance is poor, the moisturizing initial stage, and the hydraulic pressure that in water tank, the relatively low gargoyle of water level is subject to is the least, and the amount of drenching with rain is less, and later stage water level reaches specified altitude assignment, and the pressure that drips raises, and the amount of drenching with rain is big；And after timing of drenching with rain terminates, if the water level in water tank is higher, has water droplet always and ooze, client needs to take out tested sample immediately.And existing drench with rainProof boxSpeed of dripping be far longer than IEC-60529, GB-4208, DIN-40050 method of testing rule requirement；Salt fog test requirement can not be met.
Summary of the invention
It is desirable to provide a kind of accurate rain test chamber controlled that drips, its simple in construction, easy to maintenance, the requirement of the method for testings such as IEC-60529, GB-4208, DIN-40050 can be met, the time that simultaneously can drip with the control of freedom and flexibility, the amount of dripping, and ensure the concordance of the globule in whole process of the test.
The speed dripped by the pressure of gargoyle entrance, the internal diameter of gargoyle, gargoyle endoporus the degree of depth etc. because usually determining, in order to solve problems of the prior art, the accurate rain test chamber controlled have employed following technical scheme that what the present invention provided drip:
A kind of control system of the accurate rain test chamber controlled that drips, do not dripped when accomplishing moisturizing by atmospheric pressure in control water tank, when dripping, flow is controlled, and after end of dripping, gargoyle stops dripping, it is characterized in that: gather tank pressure signal by pressure transducer, feeding back to control system, control system output control signal carrys out the pressure in regulating tank, and in maintaining water tank, pressure is constant, internal diameter and the hole depth of gargoyle are constant, as long as pressure can control the amount of dripping in changing water tank.
Preferably, described gather tank pressure signal by the motor rotary speed signal detected in negative pressure generator by pressure transducer, and then the pressure signal being converted to water tank is replaced.
Preferably, the described tank pressure signal that gathers is gathered the motor rotary speed signal in tank pressure signal and detection negative pressure generator by pressure transducer, and then the pressure signal two ways being converted to water tank completes simultaneously.
nullIn order to realize above-mentioned control，The invention provides a kind of accurate rain test chamber controlled that drips，Including water tank、Water pump、Moisturizing electromagnetic valve、Water-dripping tank、Defecator、Converter、Level sensor etc.，It is characterized in that: described water tank passes through water pump、Filter、Electromagnetic valve、It is connected with water-dripping tank，IPx1 level sensor and IPx2 level sensor are installed in described water-dripping tank，The position of IPx1 level sensor is less than the position of IPx2 level sensor，Water level upper limit sensor is installed on the top of described water-dripping tank，On water level, the position of line sensor is higher than the position of IPx2 level sensor，Negative pressure generator and pressure transducer are installed in described water-dripping tank simultaneously，Described IPx1 level sensor、IPx2 level sensor、Line sensor on water level、Pressure transducer、Negative pressure generator is connected respectively at master control borad.
The beneficial effects of the present invention is: compared with prior art, the rate of dripping of the rain test chamber that the present invention provides can reach more than 98%；Moisturizing, to specifying after water level, just starts to drip, and the design uses electronic type level sensor, and water lev el control precision is at ± 0.5mm, and hydraulic pressure employing PID closed loop control, whole process concordance of dripping is good, does not haves the amount of dripping suddenly big or suddenly small；After test of dripping terminates, interior case produces a pressure strong slightly larger than hydraulic pressure, makes gargoyle no longer drip, and user can take out sample at any time, will not drench clothes simultaneously；Speed of dripping will not be affected with the change of environmental factors；The rate of dripping meets the rule requirement of IEC-60529, GB-4208, DIN-40050 method of testing.
Accompanying drawing explanation
Figure 1 The preferred embodiment provided for the present inventionSchematic diagram.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application rather than whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all should belong to the scope of the application protection.
The speed dripped of general rain test chamber by the pressure height of water level, water tank to gargoyle, gargoyle resistance etc. because usually determining；
Change the method for speed of dripping by following 3 kinds of methods: one, can control, by the height of change water level, speed of dripping；Two, can control, by change tank pressure, speed of dripping；Three, can control, by change gargoyle resistance, speed of dripping.Controlling water level, tank pressure, gargoyle resistance are difficulty with simultaneously.
In order to not drip when accomplishing moisturizing, when dripping, the water yield is uniform, and after end of dripping, gargoyle stops dripping, and the application have employed and reaches above-mentioned purpose by control tank pressure, the control system of the accurate rain test chamber controlled that i.e. drips:
By atmospheric pressure in pressure transducer collection water tank, feeding back to control system, control system output control signal carrys out the pressure in regulating tank.PID is used to automatically control, pressure stability.Specific as follows: to have two heights of water level at IPx1 and IPx2, IPx2 is slightly above IPx1, when dripping, height of water level gets off the water level (± 0.5mm) that feed-tank provides constant in the control of electronic water-level sensor, after tank pressure signal is gathered by pressure transducer, after being calculated by PID, output controls vacuum generating unit, and carrying out feed-tank provides a constant pressure, the resistance of gargoyle is fixed, as long as changing pressure can be accurately controlled the amount of dripping.
In a preferred embodiment of the invention, described gather tank pressure signal by the motor rotary speed signal detected in negative pressure generator by pressure transducer, and then the pressure signal being converted to water tank is replaced.Shown in the relation following table of the pressure in motor rotary speed and negative pressure generator.
In a preferred embodiment of the invention, described gathers the motor rotary speed signal that tank pressure signal is gathered by pressure transducer and detects in negative pressure generator, and then the pressure signal two ways being converted to water tank completes simultaneously.
According to above control method, this application provides a kind of accurate rain test chamber controlled that drips, including water tank, water pump, water-dripping tank, it is characterized in that: described water tank is connected with water-dripping tank with filter by water pump, IPx1 level sensor and IPx2 level sensor are installed in described water-dripping tank, the position of IPx1 level sensor is less than the position of IPx2 level sensor, line sensor on water level is installed on the top of described water-dripping tank, the position of water level upper limit sensor is higher than the position of IPx2 level sensor, negative pressure generator and pressure transducer are installed in described water-dripping tank simultaneously, described IPx1 level sensor, IPx2 level sensor, water level upper limit sensor, pressure transducer, moisturizing electromagnetic valve, negative pressure generator is connected respectively at master control borad.
The concrete control process of dripping of the accurate rain test chamber controlled that drips provided in application is as follows: first, water pump passes through Frequency Converter Control, is added to the water level specified with higher water velocity, to save the testing time；Meanwhile, in moisturizing process, water tank produces vacuum, makes water can not be oozed by nozzle；Then, mend to after specifying water level, adjust vacuum according to the requirement of dripping of IPx1 or IPx2, start to drench with rain, by Frequency Converter Control water pump with less flow moisturizing when drenching with rain, make water-level fluctuation reduce.Drenching with rain after end, negative pressure generation motor produces a negative pressure makes gargoyle inlet pressure less than atmospheric pressure.Water-dripping tank stops dripping.Waiting that user takes out test specimen, once test terminates.
The beneficial effects of the present invention is: compared with prior art, the rate of dripping of the rain test chamber that the present invention provides can reach more than 98%；Moisturizing, to specifying after water level, just starts to drip, and the design uses electronic type level sensor, and water level precision is at ± 0.5mm, and hydraulic pressure employing PID closed loop control, whole process concordance of dripping is good, does not haves the amount of dripping suddenly big or suddenly small；After test of dripping terminates, interior case produces a pressure strong slightly larger than hydraulic pressure, makes gargoyle not drip, and user can take out sample at any time, will not drench coat-sleeve simultaneously；Speed of dripping will not be affected with the change of environmental factors；The rate of dripping meets the rule requirement of IEC-60529, GB-4208, DIN-40050 method of testing.
Claims (6)
1. the control system of the accurate rain test chamber controlled that drips, do not drip when accomplishing moisturizing by control tank pressure, when dripping, the water yield is uniform, drip after terminating, gargoyle stops dripping, it is characterized in that: gather tank pressure signal by multiple pressure transducers, feed back to control system, control system output control signal carrys out the pressure in regulating tank, in maintaining water tank, pressure is constant, the resistance of gargoyle is fixed, and water level is fixed, as long as changing water tank atmospheric pressure can be accurately controlled the amount of dripping.
The control system of a kind of accurate rain test chamber controlled that drips the most according to claim 1, it is characterized in that: described gather tank pressure signal by the motor rotary speed signal detected in negative pressure generator by pressure transducer, and then the pressure signal being converted to water tank is replaced.
The control system of a kind of accurate rain test chamber controlled that drips the most according to claim 1, it is characterized in that: the described tank pressure signal that gathers is gathered the motor rotary speed signal in tank pressure signal and detection negative pressure generator by pressure transducer, and then the pressure signal two ways being converted to water tank completes simultaneously.
4. in order to realize the control system of a kind of accurate rain test chamber controlled that drips described in claim 1, the invention provides a kind of accurate rain test chamber controlled that drips, including water tank, water pump, water-dripping tank, it is characterized in that: described water tank is connected with water-dripping tank with filter by water pump, IPx1 level sensor and IPx2 level sensor are installed in described water-dripping tank, water level upper limit sensor is installed on the top of described water-dripping tank, negative pressure is installed in described water-dripping tank simultaneously occur, negative pressure motor rotational speed sensor and pressure transducer, described IPx1 level sensor, IPx2 level sensor, water level upper limit sensor, pressure transducer, negative pressure generator is connected respectively at master control borad.
A kind of accurate rain test chamber controlled that drips the most according to claim 4, it is characterised in that: the position of described IPx1 level sensor is less than the position of IPx2 level sensor.
A kind of accurate rain test chamber controlled that drips the most according to claim 4, it is characterised in that: on described water level, the position of line sensor is higher than the position of IPx2 level sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402135.XA CN105807173A (en) | 2016-06-08 | 2016-06-08 | Rain test chamber with precision water dropping control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402135.XA CN105807173A (en) | 2016-06-08 | 2016-06-08 | Rain test chamber with precision water dropping control function |
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| CN105807173A true CN105807173A (en) | 2016-07-27 |
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| CN201610402135.XA Pending CN105807173A (en) | 2016-06-08 | 2016-06-08 | Rain test chamber with precision water dropping control function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296793A (en) * | 2018-03-23 | 2019-10-01 | 神讯电脑(昆山)有限公司 | Dribble test equipment |
| CN111693796A (en) * | 2020-04-30 | 2020-09-22 | 惠州市德赛西威汽车电子股份有限公司 | Touch screen durability testing method and device, terminal and storage medium |
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| CN102353396A (en) * | 2011-07-06 | 2012-02-15 | 上海林频仪器股份有限公司 | Drip testing device |
| CN103163787A (en) * | 2011-12-11 | 2013-06-19 | 飞秒光电科技(西安)有限公司 | Circuit control system used for rain damage test box |
| CN203433060U (en) * | 2013-08-30 | 2014-02-12 | 江苏省如高高压电器有限公司 | Intelligent rainfall device for high-voltage electrical appliance |
| CN203616658U (en) * | 2013-11-27 | 2014-05-28 | 东莞市科翔试验设备有限公司 | Closed-loop flow numerical control system based on waterproof test |
| CN204346644U (en) * | 2014-12-29 | 2015-05-20 | 广州威锘浦环境试验设备有限公司 | IP drips proving installation |
-
2016
- 2016-06-08 CN CN201610402135.XA patent/CN105807173A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353396A (en) * | 2011-07-06 | 2012-02-15 | 上海林频仪器股份有限公司 | Drip testing device |
| CN103163787A (en) * | 2011-12-11 | 2013-06-19 | 飞秒光电科技(西安)有限公司 | Circuit control system used for rain damage test box |
| CN203433060U (en) * | 2013-08-30 | 2014-02-12 | 江苏省如高高压电器有限公司 | Intelligent rainfall device for high-voltage electrical appliance |
| CN203616658U (en) * | 2013-11-27 | 2014-05-28 | 东莞市科翔试验设备有限公司 | Closed-loop flow numerical control system based on waterproof test |
| CN204346644U (en) * | 2014-12-29 | 2015-05-20 | 广州威锘浦环境试验设备有限公司 | IP drips proving installation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296793A (en) * | 2018-03-23 | 2019-10-01 | 神讯电脑(昆山)有限公司 | Dribble test equipment |
| CN110296793B (en) * | 2018-03-23 | 2021-05-11 | 神讯电脑(昆山)有限公司 | Dripping test device |
| CN111693796A (en) * | 2020-04-30 | 2020-09-22 | 惠州市德赛西威汽车电子股份有限公司 | Touch screen durability testing method and device, terminal and storage medium |
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Application publication date: 20160727 |