公开(公告)号：US3645133A

公开(公告)日：1972-02-29

申请号：US3645133D

申请日：1970-04-15

Applicant: METROPHYSICS INC

Inventor： SIMETH PETER G ,  SEELEY RICHARD C

IPC: A61B5/087 ,  G01F1/68 ,  G01F1/00 ,  G01P5/10

CPC classification number: A61B5/0878 ,  G01F1/68

Abstract: An electronic spirometer having an accurate indication of exhaled tidal or minute volume. In the preferred embodiment, an adapter fits on the exhalation port of the breathing circle and monitors a patient''s exhaled volume when being ventilated. A heated thermistor mounted in the adapter senses the gas flow as an approximate fourth power function of the current necessary to maintain the thermistor at a constant temperature. A signal conditioner provides the current required to keep the thermistor at a constant temperature and converts the nonlinear heater current into a signal which is proportional to flow. A second thermistor in the probe corrects for temperature variations. The output of the signal conditioner is fed into the integrator circuit which converts the flow signal to a volume signal. In the minute volume mode, a clock generates a command signal every 30 seconds. This transfers the integrator output into a readout unit and resets the integrator to zero. In the tidal volume mode, the flow is integrated on a breath by breath basis and the volume signal is read out when the exhaled flow reaches zero. Outputs are provided for recording the flow rate and the minute integrated volume. An alarm system is provided for indicating when minute volume limits are too low or too high.

Abstract translation: 具有呼出潮气或微小体积的精确指示的电子肺活量计。 在优选实施例中，适配器适合于呼吸圈的呼出口，并且在通气时监测患者的呼出量。 安装在适配器中的加热热敏电阻感测气流作为将热敏电阻保持在恒定温度所需的电流的大致第四功率函数。 信号调节器提供将热敏电阻保持在恒定温度所需的电流，并将非线性加热器电流转换成与流量成比例的信号。 探头中的第二个热敏电阻校正温度变化。 信号调节器的输出被馈送到积分器电路，其将流量信号转换成音量信号。 在分钟音量模式下，时钟每30秒产生一个指令信号。 这将积分器输出传输到读出单元，并将积分器复位为零。 在潮气量模式中，气流通过呼吸进行积分，当呼出流量达到零时，体积信号被读出。 提供输出用于记录流量和分集成体积。 提供了一个报警系统，用于指示何时微小的音量限制太低或太高。

公开(公告)号：US3815130A

公开(公告)日：1974-06-04

申请号：US16794071

申请日：1971-08-02

Applicant: METROPHYSICS INC

Inventor： HAYO F

IPC: G01S1/02 ,  G01S13/56 ,  G01S19/35 ,  G08B13/24 ,  G01S9/02

CPC classification number: G08B13/2491 ,  G01S1/02 ,  G01S13/56

Abstract: An intrusion detector circuit comprising multiple antennas to detect intrusion and yet eliminate signals attributable to near antenna movements which produce false alarms.

Abstract translation: 入侵检测器电路包括多个天线以检测入侵并且消除归因于产生假警报的近天线移动的信号。

公开(公告)号：US3678269A

公开(公告)日：1972-07-18

申请号：US3678269D

申请日：1970-11-23

Applicant: METROPHYSICS INC

Inventor： MALEK FRITZ J

IPC: G01J1/18 ,  G01N21/34

CPC classification number: G01J1/18

Abstract: Method and apparatus for measuring the radiation absorption of a fluid specimen and more particularly wherein an electrical signal proportional to the radiant energy received through the fluid specimen is stored and compared with an electrical signal derived from a known reference source, the difference between the signals producing an output signal that is a measure of radiant energy absorbed by the fluid specimen. A pair of capacitors store the electrical signals for comparison and are connected alternately and intermittently to a radiation sensing means by a first pair of gates. A second pair of gates alternately and intermittently energize a pair of radiant energy sources, one source being used as a reference and the other source emitting radiant energy that is transmitted through a specimen fluid undergoing measurement. Both pairs of gates are operated synchronously by a gating circuit that is controlled by a clock and a flip-flop circuit.

Abstract translation: 更具体地说，用于测量流体样本的辐射吸收的方法和装置，更具体地，其中与通过流体样本接收的辐射能成比例的电信号被存储并且与从已知参考源导出的电信号进行比较，产生 输出信号，其是由流体样本吸收的辐射能的量度。 一对电容器存储用于比较的电信号，并且通过第一对门交替地和间歇地连接到辐射感测装置。 第二对门交替地并且间歇地激励一对辐射能源，一个源用作参考，另一个源发射通过正在进行测量的样本流体传输的辐射能。 两对门由一个由时钟和触发器电路控制的选通电路同步工作。