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公开(公告)号：US4047001A
公开(公告)日：1977-09-06
申请号：US664592
申请日：1976-03-08
CPC分类号： G01C5/06 , G01L9/02 , G01R19/252 , G01R27/00
摘要： The pressure of the atmosphere is sensed by a pressure transducer which causes a resistance to vary. The variance of this resistor is converted to a variable frequency. The number of cycles of this frequency in a set amount of time is counted by a counter and displayed by a digital display.
摘要翻译： 大气的压力由压力传感器感测到，其导致电阻变化。 该电阻的方差被转换为可变频率。 在一定时间内该频率的周期数由计数器计数并由数字显示器显示。
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公开(公告)号：US4027143A
公开(公告)日：1977-05-31
申请号：US664591
申请日：1976-03-08
摘要： The pressure of the atmosphere is sensed by a pressure transducer which causes a resistance to vary. The variance of this resistor is converted to a variable frequency. The number of cycles of this frequency in a set amount of time is counted by a counter and displayed by a digital display. An up/down counter is loaded with the count of the last digital readout in the previous cycle and counts down the number of cycles in the frequency of the next reading and displays the difference on a digital display or activates a sonic output if the countdown is greater than the stored previous count.
摘要翻译： 大气的压力由压力传感器感测到，其导致电阻变化。 该电阻的方差被转换为可变频率。 在一定时间内该频率的周期数由计数器计数并由数字显示器显示。 上/下计数器加载上一个循环中最后一个数字读数的计数，并且计数下一次读取频率的周期数，并在数字显示器上显示差值，或者如果倒计时是 大于存储的先前计数。
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公开(公告)号：US3961272A
公开(公告)日：1976-06-01
申请号：US533576
申请日：1974-12-17
摘要： The pressure of the atmosphere is sensed by a pressure transducer which causes a resistance to vary. The variance of this resistor is converted to a variable frequency. The number of cycles of this frequency in a set amount of time is counted by a counter and displayed by a digital display. An up/down counter is loaded with the count of the last digital readout in the previous cycle and counts down the number of cycles in the frequency of the next reading and displays the difference on a digital display or activates a sonic output if the countdown is greater than the stored previous count.
摘要翻译： 大气的压力由压力传感器感测到，其导致电阻变化。 该电阻的方差被转换为可变频率。 在一定时间内该频率的周期数由计数器计数并由数字显示器显示。 上/下计数器加载上一个循环中最后一个数字读数的计数，并且计数下一次读取频率的周期数，并在数字显示器上显示差值，或者如果倒计时是 大于存储的先前计数。
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