ã€Chinese instrument network instrument research and development】 Recently, three invention patents applied by the metrology institute of Nanjing, Jiangsu Province: “A Particle Size and Concentration Light Scattering Measurement Method†“A Dust Concentration Measuring Device and Method†“An Elevator Speed ​​Limiter Test Instrument Verification Device was granted the invention patent certificate by the State Intellectual Property Office.
“A particle size and concentration light scattering measurement method†belongs to the field of particle measurement technology and is mainly used to measure the concentration of particulate matter. Through a kind of particle size and concentration light scattering measurement method, the effect of direct measurement can be achieved by predicting any one of the parameters. The measurement process is simplified and a secondary measurement method is proposed to avoid the effects of window contamination in the particle size distribution solution on the measurement results.
"A device and method for measuring dust concentration" is directed to the disadvantage that the scattering integration method in the prior art is no longer applicable when the particle size is less than 10 μm, and the stepped neutral density filter is used to attenuate transmitted light and scattered light to the same value. The light intensity level achieves the simultaneous shooting of transmitted light and scattered light in the measurement system of a single digital area array camera. It has the advantages of high sensitivity, fast response, simple and compact light path system, etc., and it successfully achieves the micron level and the submicron level. The measurement of nanometer and dust concentration covers a wide range of particle sizes and has a great market advantage.
"An elevator speed limiter tester verification device" relates to the field of elevator overspeed governor tester verification. The advantage is that it has an elevator speed governor simulation device, and at the same time, the standard speed generator is added, which greatly improves the detection accuracy. Can get accurate error results. The device can independently detect the speed sensor on the tester and the elevator speed limiter tester without a motor.
(Original title: 3 inventions of the Metrology Institute won the national invention patent certificate)