什么是ITF認(rèn)證？

國際網(wǎng)球聯(lián)盟（ITF）是網(wǎng)球比賽管理機構(gòu)，其職責(zé)義務(wù)包括確定網(wǎng)球運動相關(guān)規(guī)則。多年來，網(wǎng)球相關(guān)全球科學(xué)研究水平已被限制于其他體育活動。自1997 年ITF技術(shù)中心成立以來，在網(wǎng)球設(shè)施設(shè)備以及網(wǎng)球比賽者所受到這一領(lǐng)域技術(shù)發(fā)展的影響的推動下，網(wǎng)球科技和技術(shù)已經(jīng)逐步提升。

The International Tennis Federation(ITF) is the governing body of the game of tennis and its duties and responsibilities include determination of the Rules of Tennis.For many years the level of global scientific research into tennis-related topics has been limited in relation to other sports of comparative size. Since the establishment of the ITF Technical Centre in 1997, the profile of tennis science and technology has been raised through the encouragement of research in the areas of tennis equipment, tennis facilities and the way in which the tennis player is affected by developments in these areas.

網(wǎng)球認(rèn)證

技術(shù)中心最關(guān)鍵的職責(zé)是網(wǎng)球的認(rèn)證測試-任何錦標(biāo)賽中使用的網(wǎng)球必須通過ITF檢驗認(rèn)證，測試在技術(shù)中心實驗室內(nèi)進(jìn)行。

A key function of the Technical Centre is tennis ball approval – any ball used in tournament play must be approved by the ITF, based on the tests conducted in this laboratory.

每個測試項目都有驗證失敗的可能，所有項目中最易失敗的是回彈和變形測試，最不易失敗的是尺寸和質(zhì)量測試。任何一個項目驗證失敗，則認(rèn)證無法通過。制造商需重新申請并另外提供樣品，任何樣品均采用相同的測試方式進(jìn)行測試。

Failures occur in all tests, but the most common are the rebound and deformation tests. Least common are the size and mass tests. If a brand fails, then approval cannot be granted. The manufacturer must re-apply by sending another sample, which is then tested in the same way.

場地速度評級

ITF比賽場地速度評級的發(fā)展，主要目的在于幫助網(wǎng)球場地產(chǎn)品購買者區(qū)分不同的產(chǎn)品類型，并保證表面速度符合其要求。ITF對場地速度進(jìn)行了五中分級：
種類1 慢速

種類2 中等慢速

種類3 中速

種類4 中等快速

種類5 快速

The ITF Court Pace Classification Programme has been developed to assist purchasers of tennis surface products to determine the type and speed of surface most suited to their requirements. The ITF classifies surfaces into five categories according to court pace:

Category 1 (slow)
Category 2 (medium-slow)
Category 3 (medium)
Category 4 (medium-fast)
Category 5 (fast)

ITF場地速度等級（CPR）主要對場地和網(wǎng)球表面的相互作用進(jìn)行測試。這個概念包括摩擦力和恢復(fù)特性。擦力主要確認(rèn)地面與網(wǎng)球表面接觸時，地面對網(wǎng)球水平方向運行速度的影響性能；而恢復(fù)特性主要確認(rèn)兩次連續(xù)彈跳的間隔時間。

The ITF Court Pace Rating (CPR) measures the effect of ball-surface interaction. This concept includes: friction, which primarily determines the reduction in the horizontal component of post-impact ball velocity; and vertical restitution, which determines the time between successive bounces.

球拍性能測試

網(wǎng)球拍性能測試儀器（被稱為“MYO”-希臘語意為“力量”）是一個用于測試球拍最大受力的常規(guī)儀器。每個球拍將在三種不同的球拍速度和球拍表面六個不用的受力點進(jìn)行測試，以測定球拍前端最佳的受力點。

The racket performance machine (known as “MYO” – the Greek word for muscle) is a custom built machine designed to measure the maximum power a racket can generate. Each racket is tested using three different racket speeds and six different impact LOCAIIONs on the face of the racket to identify the optimal power point on the racket head.
ITF認(rèn)證適用產(chǎn)品類型：

1. Tennis balls 網(wǎng)球

2. Tennis Rackets 網(wǎng)球拍

3. Tennis courts Surface網(wǎng)球場

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