擺式摩擦系數(shù)測定儀是一種測定路面，機場跑道，標線漆等摩擦系數(shù)的儀器。也可通過典型路面摩擦系數(shù)的測定，作為確定各種輪胎配方的依據(jù)之一。本儀器高度方便、操作簡單，測試時對交通影響較外，數(shù)據(jù)也較穩(wěn)定。且室內外均可使用。

Pendulum friction coefficient tester is an instrument for measuring friction coefficients of road surface, airport runway, marking paint and so on. It can also be used as a basis for determining various tire formulas through the measurement of typical road friction coefficients. The instrument is highly convenient and simple to operate. It has a relatively small impact on traffic during the test, and the data is more stable. And can be used indoors and outdoors.

擺式摩擦系數(shù)測定儀擺式儀是動力擺沖擊型儀器。它是根據(jù)“擺的位能損失等于安裝于擺臂末端橡膠片滑過路面過，克服路面等摩擦所做的功”這一基本原理研制而成的。

Pendulum friction coefficient measuring instrument Pendulum instrument is a dynamic pendulum impact type instrument. It is developed based on the basic principle of "the loss of positional energy of the pendulum is equal to the work done by the rubber piece installed at the end of the swing arm sliding over the road to overcome friction such as road surface".

擺式摩擦系數(shù)測定儀技術規(guī)格：

★擺動的力矩：615.000克毫米

★其中擺重量：1500±30克

★擺中矩：410±5毫米

★橡膠片對路面的瞭向靜壓力：2263克。

★擺自傾斜50處自由放下到擺動停止的次數(shù)，不少于70次。

★橡膠片外力緣距擺動中的距離508毫米。

★儀器總重約14公斤左右。

Technical specifications of pendulum friction coefficient tester:

★ Swinging moment: 615.000 grams mm

★ Weight of pendulum: 1500 ± 30g

★ Swinging moment: 410 ± 5 mm

★ The static pressure of the rubber sheet on the road surface: 2263 grams.

★ The number of times the pendulum has been freely lowered from 50 places to the stop of the swing is not less than 70 times.

★ The distance between the outer edge of the rubber sheet and the swing is 508 mm.

★ The total weight of the instrument is about 14 kg.

擺式摩擦系數(shù)測定儀使用方法：

★選點：在測試路段上，沿行車方向的左輪跡，選擇有代表性的五個測點，每測點相距約5-10米

★儀器調平：（1）將儀器測點上（標定方法見附錄），并使擺的擺動方向與行車方向一致。（2）將擺向右運動，按下釋放開關。使卡環(huán)進入釋入開關槽，閾處于水平釋放位置，然后松開釋放開關，此時指針應被拔至緊靠拔針片。（3）按下釋放開關擺向左運動，并時指針應指零。若不指零時，可稍旋緊或放松毛氈圈調節(jié)螺母。重復本項操作，直至指針指零。

★標定滑動長度：

用橡膠皮刷清除擺動范轉圍內路面上的松散顆粒和雜物。

讓擺自山懸掛，在橡膠片的外力平行擺動方向設置標準尺（126毫米），放松堅固把手，轉動升降把手。使擺緩緩下降，當滑溜塊上橡膠片剛接觸路面時，提起舉升柄使滑溜塊升高，將擺向右運動，并運動升降把手使擺下降一段距離，然后放下舉升柄使擺慢慢向左運動，直至橡膠片的邊緣剛剛接觸路面，對正126毫米尺的一端。再用手提起舉升柄，使滑溜塊向上抬起，并使擺繼續(xù)向左運動，放下舉升柄，再將擺慢慢向右運動使橡膠片的邊橡再一次接觸路面。橡膠片兩次同路面的接觸點的距離應為126毫米后，旋緊緊固把手，再校正一遍，若滑動長度不符合標準時，則升高或降低儀器底座正面的調平螺絲來校正，但須調平水準泡。使滑動長度符合要求。爾后，將擺置于水平釋放位置。

★測定：用水澆灑路面，并用橡皮刷刷刮，以便洗去泯漿，然后再灑水，并按下釋放開關，使擺在路面上滑過，指針可指示出路面的摩擦系數(shù)值（一段A次可不作記錄）。當擺向回擺時，用左手接住擺桿，右手提起舉升枘使滑溜塊升高，并將擺向右運動按下開關使擺卡環(huán)進入釋放開關，并將擺針撥至緊靠撥針片，重復此項，測定五次（每次均應灑水），記錄每次的數(shù)值。五次數(shù)值差不大于三個單位（刻度盤的一格半）如差值大于三個單位，應查產生的原因，并再次重復上述各項操作，至符合規(guī)定要求為止。

★測定結果：（1）每個測點用五次測定計數(shù)的平均值代表測點的摩擦系數(shù)值，并用五個測點的摩擦系數(shù)的平均值。代表該測定路段摩擦系數(shù)值。（2）測定讀數(shù)，該度盤上指針的讀數(shù)（簡稱“擺值”），除以100，為路面的摩擦系數(shù)。如：擺值33，摩擦系數(shù)即為0.33。

How to use the pendulum friction coefficient tester:

★ Selection point: On the test section, along the left wheel track in the driving direction, select five representative measurement points, and each measurement point is about 5-10 meters apart.

★ Instrument leveling: (1) Place the instrument on the measuring point (see the appendix for the calibration method), and make the swing direction of the pendulum consistent with the driving direction. (2) Move the pendulum to the right and press the release switch. Put the snap ring into the release switch slot, the threshold is in the horizontal release position, and then release the release switch. At this time, the pointer should be pulled close to the pin. (3) Press the release switch to move to the left, and the pointer should point to zero. If it is not zero, you can slightly tighten or loosen the felt ring adjustment nut. Repeat this operation until the pointer points to zero.

★ Calibration slide length:

(1) Use a rubber brush to remove loose particles and debris on the pavement inside the swing van.

(2) Let the pendulum hang from the mountain, set a standard ruler (126 mm) in the direction of the parallel external swing of the rubber sheet, loosen the solid handle, and turn the lifting handle. Slowly lower the pendulum. When the rubber piece on the skid block has just touched the road, lift the lifting handle to raise the skid block, move the pendulum to the right, and move the lifting handle to lower the pendulum for a distance, then lower the lifting lever to make the pendulum Slowly move to the left until the edge of the rubber sheet just touches the road, aligning the end of the 126 mm ruler. Then use the hａnd to lift the lifting handle, so that the slippery block is lifted up, and the pendulum continues to move to the left. Lower the lifting handle, and then slowly move the pendulum to the right to make the rubber of the rubber piece touch the road again. After the distance between the contact point of the rubber sheet and the road surface is 126 mm, tighten the handle tightly and correct it again. If the sliding length does not meet the standard, raise or lower the leveling screw on the front of the instrument base to correct it, but The level must be leveled. Make the sliding length meet the requirements. After that, place it in the horizontal release position.

★ Determination: Water the pavement with water, and scrape it with a rubber brush to wash away the mortar, then sprinkle the water, and press the release switch to make it slide on the road. The pointer can indicate the value of the road surface friction coefficient (a section A May not be recorded). When the pendulum swings back, catch the pendulum lever with your left hand, lift it with your right hａnd to raise the slippery block, and move the pendulum to the right to press the switch to enter the pendulum snap ring into the release switch, and turn the pendulum needle to Dial the needle, repeat this item, measure five times (each time should be sprinkled with water), and record the value of each time. The difference between the five times is not more than three units (one and a half of the scale). If the difference is more than three units, the cause should be checked, and the above operations should be repeated again until the requirements are met.

★ Measurement results: (1) The average value of the five measurement counts at each measuring point represents the friction coefficient value of the measuring point, and the average value of the friction coefficient of the five measuring points is used. Represents the value of the coefficient of friction of the measured section. (2) Determine the reading. The reading of the pointer on the dial (referred to as "swing value"), divided by 100, is the friction coefficient of the road surface. For example: the swing value is 33, and the friction coefficient is 0.33.

擺式摩擦系數(shù)測定儀結構:

★底座：由T型腿，調平螺絲和水準泡組成。對儀器起調平，支承作用。

★立柱：同立柱、升降機構，導向桿及儀器把手組成。用于升降和固定擺頭的位置。

★釋放開關：安裝于懸臂上的開關。用于保持擺桿水平位置和釋放擺落下的作用。

擺頭：由緊固把手，擺軸，轉向節(jié)，軸承等組成，起聯(lián)結擺、固定位置，保證在擺動平面內自由擺動的作用。

★示數(shù)系統(tǒng)，由指針、毛氈圈、法蘭、緊固螺母及度盤組成，指針可直接指示出摩擦系數(shù)值。

★擺：由上、上部接頭、擺桿、彈簧、杠桿系、舉升柄、外殼、滑溜塊及橡膠片組成。它對擺動中有規(guī)定力矩，對路面有規(guī)定壓力，本身前與后，左與右的力矩平衡，它是度量路面的摩擦系數(shù)的尺度。

Structure of pendulum friction coefficient tester

★ Base: It consists of T-shaped legs, leveling screws and level bubble. Level and support the instrument.

★ Column: composed of the same column, lifting mechanism, guide rod and instrument handle. For lifting and fixing the position of the swing head.

★ Release switch: a switch mounted on a cantilever. It is used to maintain the horizontal position of the swing bar and release the function of swinging down.

Swing head: It consists of a fastening handle, a swing shaft, a steering knuckle, and a bearing. It plays a role of connecting the pendulum and fixed position to ensure free swing in the swing plane.

★ The indicator system is composed of pointer, felt ring, flange, fastening nut and dial. The pointer can directly indicate the value of friction coefficient.

★ Swing: It consists of upper and upper joints, swing lever, spring, lever system, lifting handle, shell, slippery block and rubber sheet. It has a prescribed torque in the swing and a prescribed pressure on the road surface. The front and back, left and right moments are balanced. It is a measure of the friction coefficient of the road surface.