CZ201851A3 - Contact level meter - Google Patents

Abstract

More particularly, the present invention relates to a contact level probe for wireless liquid level detection signaling characterized in that the level detection information is transmitted wirelessly to the surface and which consists of a probe (5) in which the electronics including the power supply (8) is located. ). A level detector (6) is located at the lower end of the probe (5) and a signaling member (4) is located at the upper end of the probe (5), the probe (5) suspended from the measuring band (2) with scale and the signaling member (4). ) is wirelessly connected via the reference level (3) to the detection (1) of the detector touch signaling (6) in the probe (5) with the liquid level in the measured object (7).

Description

Technical field

The solution relates to a new ambulatory contact level meter, which enables wireless signaling of liquid level detection in monitoring boreholes, tanks or wells.

BACKGROUND OF THE INVENTION

The most widely used methods of ambulatory measurement of groundwater levels in boreholes or wells are electrocontact level meter and Rang's pipe.

Rang's pipe consists of a metal tube with holes and a measuring zone [1]. When immersed in water, air escapes from the pipe to create an acoustic tone. The tone determines the moment for reading the depth data from the measuring band. The disadvantage of this solution is the low measuring accuracy depending on the precision of the band handling.

The current electro-contact level meter consists of a probe with a contact sensor, a plastic band consisting of a pair of wires and a reel with evaluation electronics [2]. The circuit consists of a pair of wires in the band together with the contact sensors on the probe. The evaluation electronics in the winch trigger acoustic, optical or combined signaling. Subsequent reading of the value on the measuring band. Compared to the Rang whistle, the electrocontact level meter provides higher measurement accuracy. Its disadvantages include a band with conductors susceptible to mechanical damage when storing the band on a reel with a small bend radius. The band may exhibit dilatation after intensive use, which has a significant effect on the measurement accuracy. The band is also quite heavy and due to its thickness, a reel for a larger band must be used, which is annoying and burdensome when carrying it in the field.

SUMMARY OF THE INVENTION

The above-mentioned drawbacks are eliminated by the contact level meter according to the invention, which is based on the fact that it is wireless and consists of a probe in which the electronics including the power supply is located, a level detector at the lower end of the probe and a signaling element at the upper end. it is suspended on the measuring band with a scale and the signaling element is wirelessly connected via the reference level with the detection of the signaling of the detector contact in the probe with the liquid level in the measured object.

The contact level meter according to the invention is characterized in that the probe housing is made of a solid material, in particular metal, has an elongated shape and is suspended on a conventional measuring zone of a solid, especially metal.

The contact level meter according to the invention is further characterized in that the level detector is electronic, is provided with a needle-shaped electrode and is located directly in the probe including electronics and power supply.

The contact level meter according to the invention is also characterized in that the detection of the signaling of the probe contact with the liquid level is in particular visual, optical, radio or laser.

In the contact level meter according to the invention, all electronics, including the power source, are located directly in the probe, which is not connected to any conductor that would transmit that the probe has been in contact with the liquid level. This information is provided electronically

A3 detector by means of an electrode which is connected to a signaling element at the upper end of the probe.

The contact level meter according to the invention serves for level measurement, for example in monitoring wells, wells and tanks. When the electronic detector touches the liquid level, the operator receives information about the event via wireless signaling, which can be arbitrary. At this point, the operator can subtract the distance between the liquid level and the reference level from the scale on a common measurement band, which is very simple. There is no need to use a special zone with potted wires, which is susceptible to damage, heavy and expensive. All that is required is an optical, acoustic or other indication of the probe's contact with the level provided by a signaling element located directly at the top end of the probe.

The contact level meter according to the invention contains electronics and an accumulator or battery directly in the probe and is not connected to the surface by any conductor. Detection of probe contact with the level is signaled differently wirelessly. It is a wireless measurement compared to the existing solution, where the contact information is transmitted by conductors.

Due to the use of the conventional band, the level meter according to the invention has smaller dimensions and is considerably lighter than similar level gauges currently available on the market. Working with it is simple, fast and accurate.

Clarification of drawings

In the accompanying drawing of FIG. 1 schematically shows a contact level meter according to the invention in a measuring position. In this case, said probe is placed in a monitoring well (well), suspended on a measuring zone with a scale.

In FIG. 2 is a photograph of a contact level meter according to the invention in a rest position. In FIG. 3 is a photograph of a contact level meter according to the invention together with a conventional level meter.

The contact level meter according to the invention has been successfully verified by the inventors in practice when measuring not only in the applicant's objects, which is Ekotechnika spol. s r.o., Cemošice, CZ, but especially in the measurement of liquid level in a monitoring well belonging to the Czech Hydrometeorological Institute in the vicinity of Kostelec nad Černými Lesy, CZ.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

The contact level meter (working name Firefly) according to the invention comprises a common measuring zone 2 on the coil and a level sensor 5 which is suspended on it. At the lower end of the elongate housing of the probe 5, an electronic liquid level detector 6 is disposed and at the opposite end there is a signaling member 4, which in this case was an LED. Zone 2 is provided with a scale in cm. On zone 2, the probe 5 is lowered into the measured object 7, eg a well or a monitoring well. When the electronic detector 6 contacts the liquid level, the signaling member 4 at the end of the probe 5 and the wireless signaling 1 are activated. enabled by embedded electronics including a power source 8 such as an accumulator or battery. The probe 5 itself is not electrically connected to any conductors leading, for example, to the reel 2.

In practice, a probe 5 with a cylindrical shape of a housing made of a solid material, in particular of metal or plastic, has proved to be suitable. An electronic detector 6 with an electrode, e.g.

-2GB 2018 - 51 A3 contact needles for level detection and at the top there is a hanger for zone 2 and signaling member 4. With the mentioned probe 5 was successfully measured in the CHMI monitoring borehole with a depth of about 50 m near Kostelec nad Černými Lesy, CZ.

Industrial applicability

The new contact level meter makes it easy to quickly and accurately signal wireless liquid level detection in monitoring boreholes, tanks or wells.

Literature [1] MAJERČÁKOVÁ, Ol’ga, ŠŤASTNÝ, Pavel. Water Circulation and Its Measurement [online], Water Research Institute, 2002. Available from: http://www.fvzickageografia.sk/geovedv/texty/maiercakova vodv.pdf [2] DOWN, Randy D. and Jay H. LEHR. Environmental Instrumentation and Analysis Handbook [1], 1. US: Interscience 2005; 2004;

ISBN 9780471463542; 047146354X; 0471473332; 9780471473336;

PATENT CLAIMS

Claims (4)

A contact level meter, characterized in that it is wireless and consists of a probe (5) in which the electronics including the power supply (8) is located, at the lower end of the probe (5) a level detector (6) and a signaling member (4) is located at the end of the probe (5), the probe (5) is suspended on the measuring band (2) with the scale and the signaling member (4) is wirelessly connected via the reference level (3) to the touch signaling detection (1) a detector (6) in a probe (5) with a liquid level in the object to be measured (7). Contact level meter according to claim 1, characterized in that the housing of the probe (5) is made of a solid material, in particular a metal, has an elongated shape and is suspended on a conventional measuring zone of a solid, especially a metal. Contact level meter according to claims 1 and 2, characterized in that the level detector (6) is electronic, has an electrode for level detection and is located directly in the probe (5) including the power supply. Contact level meter according to claims 1 to 3, characterized in that the detection (1) of the signaling of the contact of the probe (5) with the liquid level is in particular visual, optical, radio or laser.