DE703382C - Recording device for distance measurement using the echo sounder method - Google Patents

Description

Recording device for distance measurement using the echo sounder method Die The invention relates to a recorder for distance measurement according to the Echo sounder method. In order to use rotating writing arms, which are only in a certain Make a recording on a radial writing surface can achieve uninterrupted registration, it is known to have multiple im Circumferential scribers offset at an angle to each other should be provided, with each scribe a transmitter for controlling the circuit for the sound emission is assigned. These devices have the disadvantage that with a certain solder sequence only in a single Scale can be registered. Since this standard is to be measured in such a way that the whole depth range to be recorded is mapped on the registration strip, can the depth or the distance from the recordings is only approximate, of course, but not exactly to a few meters or fractions of a meter, as is the case in particular would be necessary when sounding shallow sea depths or short distances.

It has already been suggested to remedy this deficiency that to use the writing arm at the same time as a transmitter to control the transmission circuit, by allowing it to act on stationary encoder contacts and for setting various Measuring ranges these encoder contacts arranged adjustable. However, this results a cumbersome holder for the encoder contacts.

It has also already been suggested that the echo sounder be used on ships Measuring range for the purpose of zero point correction and compensation of the respective draft to be adjusted by changing the relative position of the transmitting contact and the writing element. However, this adjustment requires opening the apparatus and is therefore cumbersome and time consuming.

According to the invention, the setting option is different Measuring ranges to achieve a larger scale have been created in that assigned several writing arms offset from one another at an angle to a single encoder are, of which one can be switched on optionally with its writing device is to cover the associated measuring range. This is one with consideration on the design and handling particularly simple adjustment device for various Measuring ranges have been created.

The invention is shown in the accompanying drawings, for example, and illustrated schematically.

In the drawing, I means an electric drive motor through which a shaft 2 is driven. 3 is a base plate. As a registration area is a paper strip 5 is provided, which goes through in the direction of the arrow any drive 6, e.g. B. spring mechanism, is moved radially to shaft 2. at 7 and 8 are corresponding cable connections and at g a reed frequency meter for the drive motor indicated.

On the drive shaft there are two offset from one another by 1 18o Writing arms 10 and 23 with writing devices 1 1 and 24 are arranged. It can of course, more than two writing arms can also be provided.

In the illustrated embodiment, the arrangement is made. that both writing arms attached to an annular part 17 and by a nut 14 adjustable by means of a thrust washer IS on an abutment of the drive shaft 2 are held. Of course, a design is also possible. where the two Writing arms attached to separate rings and adjustable for themselves.

Of the multiple writing arms, a writing arm is each with his Writing device can be switched on optionally to cover a certain measuring area.

The base for the registration surface is useful for precise Zero adjustment by a certain amount concentric to the axis of the writing arm. so to drive shaft 2. adjustable. In the drawing this is through two tracks 25 and 25 and indicated by an adjusting screw 27.

The angular spacing of the optical disc arm can advantageously be smaller. than it corresponds to your ratio of a full revolution to the width of the registration surface. It is thereby achieved that more than one measurement area is mapped onto the recording strip and thereby an overlap is achieved that makes the transition from one to the other Measurement area allowed to be followed more easily.

This is a major advantage of the subject matter of the invention that for any measuring range the recording on the registration surface in a large scale is possible. an accurate reading z. B. except for a few Centimeters permitted with a plumb line. This is especially important for Surveying purposes or when sounding in a body of water, the depth of which changes during travel of the ship changed only imperceptibly.

The facility is for any measurement of time differences suitable, but particularly advantageous for distance measurement by means of underwater noise.

PA 1 IN T N N 51 'k ü' cii 1. Registration device for distance measurement according to the echo sounder method with rotating writing arms, which are only in a certain Make a recording on a radial writing surface and a transducer coupled to the writing arms to control the circuit for sound emission, characterized in that a single transmitter has several are assigned at an angle offset from each other writing arms, each of which one with its writing device can optionally be switched on to the associated To mark the measuring area.

Claims (1)

2. Apparatus according to claim 1, characterized in that contact brushes and with these cooperating slip rings are provided, the electrical Power to the writing devices of the arms only while the registration surfaces are being swept respectively. 3. Apparatus according to claim 1, characterized in that the base for the registration surface for precise zero point adjustment by a certain amount is adjustable concentrically to the axis of the writing arm. 4. Apparatus according to claim 1, characterized in that the angular distance the writing arm is smaller than it corresponds to the width of the registration surface.