DE19841990A1 - Penetration lance for simultaneous measurements of sediment depths, compactness and temperature in waterways; has optic and reflex sensor to determine sediment surface and pressure transmitter to measure sediment depth - Google Patents

Abstract

The lance tip (9) has an optic (2) and a reflex sensor (3) to establish the surface of the sediment layer. A pressure transmitter (8) contacting the water through holes (19) in a bushing (15) measures the depth of the sediment below the surface. A temperature sensor (4) determines the sediment or water temperature. As the lance is pushed through sediment, a load cell (6) measures its compactness. Extensions can be screwed onto the lance to vary its length, so that a single person in a boat can operate it with ease.

Description

The invention relates to a rod penetrometer, in particular for detection and Determination of the consolidation and the depth of sludge deposits in Waters.

It is part of the generally known prior art to penetrometer Determination of the strength properties and the layer structure of floors to use.

For example, from DD-PS 286729 and DE-OS 25 03 415 Rod penetrometer known for ground force measurement, which consists of several one inside the other Joined parts exist and electronic force sensors to determine the Soil strength included.

A disadvantage of all known solutions is that they are only for force measurements and are suitable for determining penetration depths as well as complex Prepare for measurement.

The invention specified in the claim is based on the problem as many physical parameters as possible, for example depth, start of the Sediment layer, its strength and temperature, as well as the water temperature to record and evaluate quickly and simultaneously.

This problem is solved by the features listed in the claim. According to the invention, in particular via threaded connections extendable, light, hand-operated rod penetrometer used whose test probe in the base tube contains an optical glass and a reflex sensor Detect the beginning of the sediment layer and include a force transducer is arranged between the test probe and the base tube.

A temperature sensor is also located in the test tip. In the second tube There is a pressure transmitter on the rod penetrometer. For the Pressure compensation in each pipe extension is one with side holes provided rotatable sleeve provided.

The advantages achieved by the invention are in particular that with the rod penetrometer simultaneously complex data such as Firmness of water bodies, water and soil temperature, beginning of Sediment layer and the respective working depth can be determined at the same time. The rod penetrometer is therefore particularly suitable for the acquisition of data  for the assessment of the stability and genesis of deposits and Embankments.

The rod penetrometer can be easily operated by one person in the boat and for the Transport can be disassembled. It is especially threaded Pipes can be extended to any working depth.

An embodiment of the invention is shown in the drawing and will described in more detail below.

The perforated disk 1 , the optical glass 2 , the reflex sensor 3 , the temperature sensor 4 and the slide ring 5 are arranged in the test tip 9 located in the base tube 10 of the rod penetrometer.

The sealing ring 18 is located between the base tube 10 and the test probe 9 .

Test probe 9 and base tube 10 are connected to one another via the first disc 11 , the force transducer 6 and the second disc 12 .

The third disc 14 is held by the intermediate ring 13 , which is screwed into the base tube 10 . The third disk 14 contains the gland screw connection 7 .

The second tube 17 , which is screwed onto the intermediate ring 13 with the thread 21 , contains the pressure transmitter 8 which is fastened in the holder 16 . The holder 16 is screwed into the second tube 17 .

In the extension tubes there is an outwardly guided cable 20 which contains the signal and supply lines.

When the rod penetrometer, which can be extended according to the depth, penetrates into waters with sludge deposits, the reflex sensor 3 detects the sediment layer. At the same time, the temperature sensor 4 located in the test probe 9 measures the water and sediment temperatures. Due to friction and lateral pressure on the outer wall of the test probe 9 in the sediment layer, with uniform penetration via the force transducer 6, information about the strength of the soil layer is obtained.

The third disk 14 ensures the watertight sealing of the test probe 9 and the base tube 10 .

To reduce friction, the sliding rings 5 are located between the test probe 9 and the base tube 10 .

The pressure transmitter 8 , which is fastened in the holder 16 , provides information about the depth in the water.

The pressure balance within the pipe system takes place in all pipes via the holes 19 in the sleeve 15 .

The waterproof cable 20 , which is located inside the pipe system, contains the signal and supply lines.

Reference list

1

Perforated disc

2nd

optical glass

3rd

Reflex switch

4th

Temperature sensor

5

Slide ring

6

Load cell

7

Gland screw connection

8th

Pressure transmitter

9

Test probe

10th

Base tube

11

first disc

12th

second disc

13

Intermediate ring

14

third disc

15

Sleeve

16

holder

17th

second pipe

18th

Sealing ring

19th

Holes

20th

electric wire

21

thread

Claims (1)

Rod penetrometer, in particular for determining the condition and evaluating water sediments using sensors which are arranged in a pipe system, characterized in that an optical glass ( 2 ) and a reflex sensor ( 3 ), which are located in a test probe ( 9 ) of the rod penetrometer are used, that a temperature sensor ( 4 ) in the test probe ( 9 ) is used to determine the water and soil temperature and a force transducer ( 6 ) between the test probe ( 9 ) and the base pipe ( 6 ) to determine the strength of the sediment layers. 10 ) is arranged that to determine the working depth there is a pressure transmitter ( 8 ) in a second tube ( 17 ) that the rod penetrometer can be extended in length by additional tubes in particular via threaded connections of the tubes ( 10 , 17 ) and that in Provide each pipe extension with pressure holes ( 19 ) for pressure equalization A rotatable sleeve ( 15 ) for regulating the amount of water entering is present.