JM-1 safety helmet shock absorption and penetration tester
1. introduction
This testing machine, meets with test method GB/T 2812, is mainly
used to measure and determine properties of shock absorption and
penetration resistance of safely helmet. It is widely used inthe
areas of supervision and inspection station of special personal
protective devices, building research institute, testing station of
construction engineering, electric power department and
manufacturer of helmet, etc.
2. specification
| 1 | Shock hammer | weight | 5-5.01kg |
| Hammer type | hemispheric |
| Diameter | 48mm |
| material | 45# steel |
| 2 | Penetration cone | Weight | 3-3.05kg |
| Angle of cone | 60 degrees |
| Diameter of cone tip | 1mm |
| Length | 40mm |
| Max. diameter | 28mm |
| Hardness | HRC45 |
| 3 | Max. Height of shock hammer / penetration cone | 1000mm, adjustable |
| 4 | Force measuring | Adopting dynamic force sensor, measuring range 0-20KN, min.
frequency of force sensor 5kHZ, error of force within ±2%, min.
reading value 1N |
| 5 | Special head form | 1#, 2# alusil alloy head form for test, details see Pic.1 and Pic.
2 |
| 6 | Electromagnet release point | Adjusted according to requirement |
| 7 | Controlling mode of shock hammer and penetration cone | By auto suction of electromagnetic to control the suspending and
release of shock hammer and penetration cone |
| 8 | Basement | High anti-shock capability, can fix force sensor tightly |
| 9 | Alarming device for penetration resistance test | Auto alarming when penetration cone touch head form and light
blinks at the same time |
| 10 | LED digital display | Min. reading value 1N, auto save max. force |
Note: (0-83)mm is the contour height with top point of head form
Distance between each point on contour line and top point of head
form ,see following:
| A | 0° | 10° | 20° | 30° | 40° | 50° | 60° | 70° | 80° | 90° | 100° | 110° | 120° | 130° | 140° | 150° | 160° | 170° | 180° |
| 0 | 0 |
| 3 | 35 | 34.5 | 34.5 | 34.5 | 34.5 | 34 | 33 | 32.5 | 32 | 31 | 31 | 30 | 30 | 29 | 28.5 | 27 | 27.5 | 26.5 | 26.5 |
| 13 | 43.5 | 44 | 43.5 | 43.5 | 43 | 42.5 | 42.5 | 42 | 42 | 43 | 44 | 45 | 45 | 45 | 45 | 45.5 | 45.5 | 46 | 46.5 |
| 23 | 60.5 | 61 | 60 | 59 | 58.5 | 58 | 58 | 57 | 56 | 56 | 57 | 59 | 60.5 | 62 | 63 | 62 | 62 | 61.5 | 62.2 |
| 33 | 72 | 71 | 70 | 68.5 | 67.5 | 66 | 66 | 65 | 64 | 64 | 65 | 67.5 | 70 | 72 | 73 | 73 | 73 | 71.5 | 71 |
| 43 | 77 | 77.5 | 76.5 | 75 | 73 | 71 | 71 | 70 | 68.5 | 68.5 | 70 | 73 | 75.5 | 78 | 80 | 80 | 80 | 79 | 78 |
| 53 | 84 | 84 | 82 | 80 | 78 | 75.5 | 75.5 | 73 | 72 | 72 | 74 | 77 | 79 | 82 | 84 | 84 | 84 | 83 | 83 |
| 63 | 87 | 87 | 86 | 86 | 81 | 79 | 79 | 75 | 75 | 74 | 76 | 78.5 | 82.5 | 86 | 87 | 88 | 88 | 88.5 | 88.5 |
| 73 | 90 | 90 | 89 | 86.5 | 84.5 | 81.5 | 81.5 | 76 | 75 | 76 | 78 | 81 | 85 | 87.5 | 89 | 89.5 | 89.6 | 90 | 90 |
| 83-250 | 91.5 | 92.5 | 91 | 88 | 84.5 | 81.5 | 81.5 | 76 | 75 | 7+ | 78 | 81 | 85.5 | 89 | 91 | 92 | 92 | 92 | 93 |
Note: A means distance between contour line and top point of hear
form. Unit is mm.
Note: (0-88mm is the contour height with top point of head form
Distance between each point on contour line and top point of head
form ,see following:
| A | 0° | 10° | 20° | 30° | 40° | 50° | 60° | 70° | 80° | 90° | 100° | 110° | 120° | 130° | 140° | 150° | 160° | 170° | 180° |
| 0 | 0 |
| 08 | 28.5 | 28 | 27 | 25.5 | 26 | 26.5 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 37 | 38.5 | 39.5 | 40 |
| 18 | 51.5 | 50.5 | 49 | 47.5 | 47 | 46.5 | 46.8 | 47 | 48 | 49 | 50.5 | 51 | 51.5 | 53 | 53.5 | 55 | 55.5 | 56.4 | 57 |
| 28 | 64 | 63 | 62 | 61.5 | 61 | 60 | 59.8 | 59.5 | 60.5 | 61.5 | 63 | 64 | 65 | 65.5 | 66.5 | 68 | 69 | 69 | 69 |
| 38 | 74 | 74 | 73 | 71 | 70.5 | 69.5 | 69 | 68.5 | 68.5 | 69.5 | 71 | 72.5 | 73.5 | 74.5 | 76 | 78 | 78.5 | 78.5 | 79 |
| 48 | 82 | 82 | 82 | 79.5 | 77 | 75 | 74 | 74 | 74 | 73.5 | 75 | 76 | 77.5 | 79.5 | 80.5 | 82 | 82.5 | 82.5 | 82 |
| 58 | 90 | 90 | 88.5 | 86 | 82 | 78.5 | 76.5 | 76 | 77 | 77.5 | 78.5 | 80.5 | 83 | 86.5 | 89 | 90 | 90.5 | 89.5 | 89.6 |
| 68 | 95 | 94.5 | 92.5 | 91 | 86 | 83 | 80.5 | 79.5 | 79.5 | 80 | 81 | 83 | 83 | 88 | 89 | 91.5 | 91.5 | 91.5 | 91 |
| 78 | 98.5 | 98 | 96 | 93 | 88 | 84 | 82.5 | 81 | 81 | 81 | 81.5 | 83 | 86 | 89 | 91 | 92 | 93 | 93.5 | 92 |
| 8-250 | 99 | 99 | 97.5 | 94 | 89.5 | 85.5 | 83.5 | 82.5 | 82 | 82 | 83 | 84 | 87 | 90 | 92.5 | 94 | 94.5 | 95 | 94 |
Other equipment for helmet testing
JM-2 helmet ultraviolet light cabinet
1. introduction
It is special for the ultraviolet light treatment of helmet, widely
used in areas of supervision and inspection station of special
personal protective devices, building research institute, testing
station of construction engineering and manufacturer of helmet,
etc.
2.specification
| 1 | Source of ultraviolet light | 450W high pressure Short pulse xenon lamp |
| 2 | Cooling mode | Air cooling, to make sure inside temperature is lower than 60℃ |
| 3 | Precision of temperature sensor | 0.2% |
| 4 | Lighting time and its precision | 0-999 hours, with precision of 1 min |
| 5 | Max. treating quantity | 1-14 pcs helmet |
| 6 | Materials of electric control box | Cold rolled sheet |
| 7 | Material of testing box | Stainless steel |
| 8 | Timing function | Auto stop timing when xenon lamp is off |
| 9 | Protecting functions | Auto cut electric power when device work wrong |
JM-3 water immersion cabinet for helmet
Specification
| 1 | Temperature at constant temperature water immersion box | 20℃±1℃ |
| 2 | Low temperature | -20℃±1℃ or -10℃±1℃ |
| 3 | Timing range of digital timer | 0-99.99 hour |
| 4 | Temperature setting range | -20℃ to +20℃ |
| 5 | Special specimen frame | For fix helmet of different specification |
| 6 | Temperature controller | PID auto control |
| 7 | Heating system | Stainless steel finned type heating system |
JM-4 vertical wearing height measuring device for helmet
Introductions
1. equip with 1# and 2# head form
2.high precision horizontal digital caliper
3.accuracy of measurement:1mm, min. reading value:0.01mm
JM-5 high temperature box for helmet
Specification:
1. test temperature:50℃±2℃
2. temperature range:0-300℃
3.PID auto controller for temperature
4. time setting range:0-99.99 hours
JM-6 helmet lateral rigidity tester
1.introduction
It is special for determine and measuring chin strap strength and
lateral anti-compression capabilities of helmet.
2.Specification
LED digital displayer display max. force at real time, auto save
max. force
Force measuring range:0-750N, precision 1%
LED digital displayer displays distance at real time
Displacement measuring range:100mm, precision:0.1mm
Time range:0-99 min, precision:0.1s
Stainless steel rod, move up and down freely, operate easily and
conveniently
High precision distance measuring device, display distance between
two plates at real time, resolution is 0.1mm
Up and low limit position protecting functions, alarming while
arrive at up or low limit position
