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method and device for ueberwachen of reifezustandes of koerpern, e.g. abbindendem concrete

机译:柯尔伯恩河西非地区的方法和装置,例如abbindendem混凝土

摘要

1286262 Measuring temperature electrically A E ELECTRONICS Ltd 29 Aug 1969 [30 Aug 1968] 41569/68 Heading G1N [Also in Division G4] Capacitors 39, 40, Fig.1, discharged to produce an output pulse to counter 55A by a unijunction transistor 43 each time the charge reaches a predetermined level are charged at a rate dependent on the temperature of a material in which a probe 26 is in contact. If the material is concrete or plastics the count represents its maturity. The detector 26 is preferably a thermistor and is positioned in a bridge circuit 26, 27, 28, 29, 30, 31, the resistor 31 being used to balance the bridge. The bridge output is applied to an operational amplifier circuit 38 so that the capacitors 39, 40 in the base circuit of the unijunction transistor 43 of a relaxation oscillator are charged and discharged. The switching point for transistor 43 is selected by variable resistor 44. The discharge pulse train is fed via a two-stage amplifier to the counter 55A.
机译:1286262电气测量温度AE ELECTRONICS Ltd 1969年8月29日[1968年8月30日] 41569/68标题G1N [也在G4分区中]图1的电容器39、40放电,分别由单结晶体管43放电以产生输出脉冲至计数器55A。当电荷达到预定水平时,电荷的速率取决于探针26所接触的材料的温度。如果材料是混凝土或塑料,则表示其成熟度。检测器26优选地是热敏电阻并且位于桥电路26、27、28、29,30、31中,电阻器31用于平衡桥。桥输出被施加到运算放大器电路38,使得弛张振荡器的单结晶体管43的基极电路中的电容器39、40被充电和放电。晶体管43的开关点由可变电阻器44选择。放电脉冲串通过两级放大器馈送到计数器55A。

著录项

  • 公开/公告号DE000001943908A

    专利类型

  • 公开/公告日1970-03-05

    原文格式PDF

  • 申请/专利权人 A E ELECTRONICS LTD;

    申请/专利号DE1943908A

  • 发明设计人 WEBSTER HUTTON PETER;

    申请日1969-08-29

  • 分类号G01N27/00;

  • 国家 DE

  • 入库时间 2022-08-23 10:49:59

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