TH741.2 98032068数字式i角检测仪的研究=Research on the digitali—angle gauge[刊,中]/周绍光,熊仁生,吴圣雄(中科院西安光机所.陕西,西安(710068)),戈兆祥(华东工业大学.上海(200093))∥光学精密工程.—1997,5(4).—123—128首先对...TH741.2 98032068数字式i角检测仪的研究=Research on the digitali—angle gauge[刊,中]/周绍光,熊仁生,吴圣雄(中科院西安光机所.陕西,西安(710068)),戈兆祥(华东工业大学.上海(200093))∥光学精密工程.—1997,5(4).—123—128首先对已有的不同i角检测方案进行了分析 ,然后描述了数字式i角检测仪的原理,同时说明了该仪器的调校和使用方法,最后。展开更多
In the traditional dual-frequency radar ranging system,there is a contradiction between ranging precision and ranging distance.So a tri-frequency ranging method is proposed.The principle of the tri-frequency ranging i...In the traditional dual-frequency radar ranging system,there is a contradiction between ranging precision and ranging distance.So a tri-frequency ranging method is proposed.The principle of the tri-frequency ranging is that the distance can be achieved by transmitting the three frequencies and then measuring the three phase difference and calculating the number of wavelength.What's more,range ambiguity will not occur within a certain distance.The experimental results show that,if the waveband is 0.47 ~0.57 m,the measurement of unambiguous distance of 25 ~500m can be realized.If the wavelength tolerance error is less than ± 10^(-7) and the phase error is less than ± 10^(-3),the precision of the distance ranging can reach 10^(-6).展开更多
文摘TH741.2 98032068数字式i角检测仪的研究=Research on the digitali—angle gauge[刊,中]/周绍光,熊仁生,吴圣雄(中科院西安光机所.陕西,西安(710068)),戈兆祥(华东工业大学.上海(200093))∥光学精密工程.—1997,5(4).—123—128首先对已有的不同i角检测方案进行了分析 ,然后描述了数字式i角检测仪的原理,同时说明了该仪器的调校和使用方法,最后。
基金Supported by the National Natural Science Foundation of China(No.61107052)the National Natural Science Foundation of Tianjing(No.11JCYBJC00100)
文摘In the traditional dual-frequency radar ranging system,there is a contradiction between ranging precision and ranging distance.So a tri-frequency ranging method is proposed.The principle of the tri-frequency ranging is that the distance can be achieved by transmitting the three frequencies and then measuring the three phase difference and calculating the number of wavelength.What's more,range ambiguity will not occur within a certain distance.The experimental results show that,if the waveband is 0.47 ~0.57 m,the measurement of unambiguous distance of 25 ~500m can be realized.If the wavelength tolerance error is less than ± 10^(-7) and the phase error is less than ± 10^(-3),the precision of the distance ranging can reach 10^(-6).