In 2004, China issued the national standard GB 50034-2004 "Architectural Lighting Design Standards", which required classroom classroom illumination to reach 300 lx and blackboard illumination to reach 500 lx. In 2006-2007, the Beijing Municipal Government replaced all high-efficiency lighting sources in primary and secondary schools. In order to understand the current situation of classroom lighting in primary and secondary schools in Beijing, and to evaluate the improvement effect, it is easy for education and health departments to guide the school to improve the lighting environment. In 2007, the author launched Beijing primary and secondary schools in Chongwen, Fengtai, Changping and Mentougou. Survey of lighting status.
1 shake object and method
1. 1 Shake the object using the typical sampling method, select 20 schools in 4 districts and counties of Changping, Fengtai, Mentougou and Chongwen in Beijing, each school has 2 classrooms, a total of 80 schools (40 primary schools, 40 Middle school), 160 classrooms. Among them, 119 classrooms use three-primary fluorescent lamps, and 41 classrooms use ordinary fluorescent lamps.
1. 2 shaking method
1. 2. 1 Shake the current situation of lighting in Beijing primary and secondary schools. Take the method of on-site investigation to measure the nighttime lighting of the classroom.
1. 2. 2 shaking application GB 50034-2004 "architectural lighting design standards" operation recommendations for field testing. Select a classroom to measure the lighting effects of different types of lamps on site, and calculate the number of suitable lamps and minimum lighting power density required to reach the lighting standard.
1. 2. 3 Shake test items shake classroom area, classroom average illumination and illumination uniformity, blackboard average illumination and illumination uniformity, lamp type and specifications, lamp arrangement.
1. 2. 4 Shake detection method Shake the inspection according to the method specified in the GB/T 5700-1985 Indoor Lighting Measurement Method of the People's Republic of China.
1. 2. 5 shaking evaluation standard shake according to "Architectural Lighting Design Standards" (GB 50034-2004), classroom classroom illumination reached 300 lx, illumination uniformity reached 0.77 is qualified; blackboard illumination reached 500 lx, uniform illumination The degree is 0.77.
1. 3 shake statistical analysis shake using EpiData 3. 1 establish a database, statistical analysis with SPSS 11. 5. The average status, median and other indicators are used to describe the current situation of classroom lighting. Statistical analysis is carried out by using t test, analysis of variance, rank sum test and word 2 test.
1. 4 Shake quality control Shake on-site inspection personnel are all school health professionals who have been trained and have a certificate of employment; the inspection process is carried out in strict accordance with the standards, unified instruments, unified standards, and unified methods, and the entire staff of the Beijing Municipal Center for Disease Control and Prevention Tracking for quality control; checking data one by one during data sorting and entry to ensure accuracy in data transfer.
2 shake results
2. 1 shaking the current situation of school classroom lighting
2. 1.7. The average illuminance of the classrooms in the primary and secondary school classrooms is (264. 9 according to 118. 9) lx, the pass rate is 33.7%. The average illuminance of the desktop in the urban area is (272. 8 according to 130. 3) lx, the pass rate is 37. 5%; the average illuminance of the suburban classroom is (257. 0 according to 106.5) lx, the pass rate is 30.0%. There was no significant difference in the average illuminance between the urban and suburban classrooms (t =0. 838, P =0. 403).
