How the Hirays Air Tightness Tester tests speakers mainly depends on the structure of the product being tested. Some speakers have air vents, such as JBL's and Beijing Hyundai's. As long as they are slightly larger, air vents are usually reserved. For this type of product testing, there is no need for additional air tightness testing tooling. As long as the air tightness test quick interface is used to connect the air vents of the product, the test can be performed.If there is no inflation port, you need to make a sealing tool according to the shape of the product, then put the product into the test tool, connect it to the air tightness tester, and you can test it.Hirays' speaker air tightness tester integrates a positive and negative pressure test system. It can use negative pressure or positive pressure to test the waterproof level of the speaker. It is more applicable. Facing different test conditions, you can choose the most efficient air tightness and waterproof level testing solution. The following example picture shows JBL series products, whose protection level is IPX7. Some standards correspond to the laboratory standards: 1 meter underwater, half an hour, no water ingress.

Because the air tightness detector uses gas as the medium for detection, water molecules must be larger than air molecules, and we cannot detect for half an hour (inefficient), so we use a detection pressure of 10KPA (completely simulates underwater pressure), through the mold, to form pressure around the product, which is also the direction of completely simulated water pressure. To detect the gas leakage of the speaker, thereby achieving the speaker air tightness test, IPX6, IPX7 waterproof level.

It can be clearly seen from the product tooling that the audio product testing is to put the whole machine into a sealed mold, and then add equal amounts of pressure through the instrument. After the pressure is stabilized, the instrument analyzes and calculates the specific pressure drop, so as to determine whether the product can reach its corresponding IPx7 waterproof level.

Testing difficulties:

This type of speaker products have common characteristics:

1. There is no inflatable hole, there is a passive radiator, there is a speaker membrane, and some products also have waterproof and breathable membranes, so the pressure resistance is limited. In other words, the instrument range selection and the instrument output pressure must be accurate. If you are not careful, you may crush the product. As a result, the product will be damaged, and the airtightness and leak detection will be lost.

2. The deformation of the product is large and irregular. When the detection pressure is fixed and the volume changes, the corresponding test results will also appear crossed and inaccurate.

How Haireisi solves similar problems:

1. To ensure the accuracy of the instrument, the sensor of Hirays' precision airtight leak detection system adopts the American Honeywell brand, and after secondary development, the sampling speed can reach 114 times per second.

2. Hai Ruisi's intelligent air tightness test control system has achieved 24-bit AD conversion, and its 32-bit CPU has reached international first-class computing and processing.

3. The test accuracy reaches 1PA, no matter how small the leakage is, it can be easily detected, which means that only bubbles as big as a pinhole can be detected every minute.

4. The test mold is excellent and completely imitates the shape of the product with positive tolerance amplification. The smaller the excess space between the mold and the product, the more conducive to improving the detection accuracy.