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    Refraction measuring apparatus
    1.
    发明授权
    Refraction measuring apparatus 失效
    折光测量装置

    公开(公告)号：US3552860A

    公开(公告)日：1971-01-05

    申请号：US3552860D

    申请日：1969-06-09

    Applicant: AGA AB

    Inventor： GRANQVIST CARL-ERIK

    IPC: G01N21/41 ,  G01N21/46

    CPC classification number: G01N21/41

    Abstract: A SYSTEM FOR MEASURING THE REFRACTIVE INDEX ALONG A PATH IS PROVIDED WHEREIN TWO LIGHT SIGNALS, WHICH ARE OF DIFFERENT COLORS AND WHICH ARE INTENSITY-MODULATED WITH DIFFERENT FREQUENCIES, ARE TRANSMITTED ALONG THE PATH TO A RECEIVER INCLUDING A PHASE DETECTOR. THE PHASE DETECTOR PRODUCES AN OUTPUT IN ACCORDANCE WITH THE PHASE DIFFERENCE BETWEEN THE SIGNALS, WHICH OUTPUT IS A MEASURE OF THE DIFFERENCE IN REFRACTIVE INDEX FOR THE TWO COLORS. THE RECEIVER INCLUDES A PHOTOMULTIPLIER TUBE WHICH PROVIDES HETERODYNING OF THE SIGNALS TO FORM A DIFFERENCE-FREQUENCY SIGNAL WHOSE PHASE REPRESENTS THE PHASE DIFFERENCE BETWEEN THE TWO COLOR SIGNALS. EACH COLOR IS ALTERNATELY MODULATED WITH ONE OR THE OTHER OF TWO FREQUENCIES RESULTING IN A DOUBLING OF THE SIGNAL AT THE RECEIVER. ONE OF THE SIGNALS MAY BE DELAYED AT THE TRANSMITTER SO THAT THE SIGNALS ARE OF EQUAL PHASE AT THE RECEIVER, THE RECEIVER SERVING AS A NULL INSTRUMENT AND THE DELAY BEING A MEASURE OF THE REFRACTIVE INDEX.

    Distance measuring device
    2.
    发明授权
    Distance measuring device 失效
    距离测量装置

    公开(公告)号：US3680101A

    公开(公告)日：1972-07-25

    申请号：US3680101D

    申请日：1970-08-10

    Applicant: AGA AB

    Inventor： GRANQVIST CARL-ERIK

    IPC: G01S13/38 ,  G01S17/32 ,  G01S9/24

    CPC classification number: G01S13/38 ,  G01S17/32

    Abstract: A distance measuring device wherein the phase difference between a transmitted signal and the received reflection thereof is used to determine the distance the received signal has traversed. The device generates a pair of electromagnetic waves at two accurately known frequencies. The first frequency wave is transmitted and the other frequency wave is used to modulate the received reflected wave in the receiver to produce a difference frequency. A phase measuring circuit compares the phase of this difference frequency to the phase of a signal of the same difference frequency that has been generated locally within the device. To resolve the ambiguity in the resulting phase difference measurement obtained, a switching means is provided to reverse the roles of the generated waves by connecting the second frequency wave to the transmitter and connecting the first frequency wave to the modulatable receiver. This same switching means also changes the phase measuring circuit so that the phase difference associated with the modulated received second frequency is subtracted from the first phase difference. By providing a phase difference measurement at a difference frequency having an associated effective wave length larger than the distance to be measured any ambiguity regarding the number of wavelengths contained in the measured distance is eliminated.

    Abstract translation: 一种距离测量装置，其中发射信号与其接收反射之间的相位差用于确定接收信号已经穿过的距离。 该装置以两个精确已知的频率产生一对电磁波。 发射第一个频率波，另一个频率波被用于对接收机中的接收的反射波进行调制，以产生一个差分频率。 相位测量电路将该差分频率的相位与在器件内本地生成的相同差分频率的信号的相位进行比较。 为了解决所得到的相位差测量结果中的模糊性，提供了一种切换装置，通过将第二频率波与发射机连接起来并将第一频率波形连接到可调制的接收机来反转所产生的波的作用。 相同的切换装置也改变相位测量电路，从而从第一相位差减去与调制接收的第二频率相关联的相位差。 通过在具有比要测量的距离大的相关联的有效波长的差频上提供相位差测量，消除了关于测量距离中包含的波长数量的歧义。

    Arrangement for generating voltages for aiming a gun
    4.
    发明授权
    Arrangement for generating voltages for aiming a gun 失效
    用于产生用于瞄准枪的电压的装置

    公开(公告)号：US3586984A

    公开(公告)日：1971-06-22

    申请号：US3586984D

    申请日：1968-10-14

    Applicant: AGA AB

    Inventor： GRANQVIST CARL-ERIK ,  WIKLUND KLAS RUDOLF

    IPC: F41G5/06 ,  G06G7/14

    CPC classification number: F41G5/06

    Abstract: An arrangement for creating voltages for aiming a gun, such as for lateral correction or correction of the elevation of the gun making use of the similarity between the charging or discharging function of a capacitor in a series circuit comprising a resistor and a capacitor and the required correction as a function of the firing range of the gun.

    High-frequency tuning device
    10.
    发明授权
    High-frequency tuning device 失效
    高频调谐装置

    公开(公告)号：US3422379A

    公开(公告)日：1969-01-14

    申请号：US50515365

    申请日：1965-10-25

    Applicant: AGA AB

    Inventor： GRANQVIST CARL-ERIK

    IPC: H03H5/00 ,  H01P7/00 ,  H01H3/00

    CPC classification number: H03H5/006 ,  H03H5/003

    Abstract: 1,077,629. Tuned transmission lines. AGA A.B. Oct. 26, 1966 [Nov. 23, 1964], No. 45245/65. Headng H1W. A tuner for the 20-400 MHz range comprises a capacitor and a number of electrically parallel conductors rotatable about a common axis towards and away from a ground plane, the arrangement being such that the conductors approach each other as they are rotated away from the ground plane. The two conductors 3, 4 shown in Fig. 7, are of U-shape and are rotatable about an axis 6 passing through the limbs of the U's. The position of the conductors determines the characteristic impedance and hence the resonant frequency of the arrangement, the impedance being at a maximum when the conductors are closest together and farthest away from the ground plane (position indicated by broken, line). Although a simple flat ground-plane may be used, the one illustrated consists of two troughs respectively formed by members 18, 19 and 20, 21. Trimming may be accomplished by bending the sides of the troughs, as shown. The electrical length of the arrangement may be increased by capacitative loading. two systems may be connected in tandem, the second system being rendered inoperative by a short-circuiting switch at the connecting point. The Specification describes a modification using three U- shaped conductors.

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