RU219624U1 - SETTLEMENT SENSOR - Google Patents

Abstract

The utility model relates to devices for indicating the level of bulk media, as well as sediment in liquid media. The sediment sensor includes a hollow body made of fluoroplastic, made in the form of a single arched structure with an arch and two posts located opposite each other, attached at the ends of the arch. In this case, an infrared emitter is located in one rack, and a radiation receiver is located in the other rack. An electric board is installed inside the case, containing a power supply unit, a shaper of a sequence of bursts of electrical impulses connected to an infrared emitter, and a received signal processing unit connected to a radiation receiver. The housing cavity is filled with a composite sealing material, while the sensor is designed to be installed in the measuring environment with an arched structure at the top, and sections vertically down. The technical result is an increase in the reliability and durability of operation under the influence of an unfavorable environment in which measurements are taken. 5 z.p. f-ly, 4 ill.

Description

FIELD OF TECHNOLOGY

The utility model relates to devices for indicating the level of bulk media, as well as sediment in liquid media.

PRIOR ART

Optical sensors that determine the level of sediment are designed to detect the presence of excess foreign particles in the water - clay, silt, sand and other sediments. As a rule, they work under conditions of physical impact on the pollution sensor, especially if the sediment has solid inclusions, such as sludge, stones, debris. Thus, according to the technical requirements, optical sediment sensors differ markedly from water turbidity sensors, which are often used in household appliances and can be installed in liquid in any position.

An invention is known according to patent CN 115266653, publication 11/01/2022, IPC G01N 21/49, which discloses the design of the water turbidity sensor. The waterproof turbidity sensor contains a transparent shell, a printed circuit board installed in the shell. The circuit board is equipped with an infrared transmitting tube, an infrared receiving tube.

An invention is known according to patent EP 2133687, publication 12/16/2009, IPC G01N 21/53, which discloses the design of a leak monitoring device at a sewage treatment plant. A liquid turbidity meter is also built into the control device, which is installed at the end of the sensor in a case made of polycarbonate or made in the form of a glass case. The turbidity meter has an additional UV source to prevent biofilm formation on the body, especially over a long period of time.

The closest analogue is the design of the turbidity sensor according to the patent DE 102006041274, publication 03/06/2008, IPC G01N 21/49. The sensor has an infrared LED and a receiver in the form of a phototransistor. The transparent case accommodates the transmitter and receiver. The inside of the housing in the area of the transmitter and receiver is filled with a transparent sealing medium in the form of crystal clear silicone, which has a higher refractive index than air. The housing contains an electronic circuit for generating transmitter signals and processing receiver signals.

ESSENCE OF THE UTILITY MODEL

The technical result achieved in this device is to increase the reliability and durability of the device under the influence of an unfavorable environment in which measurements are taken.

The sediment sensor includes a hollow body made of fluoroplastic, made in the form of a single arched structure with an arch and two posts located opposite each other, attached at the ends of the arch. In this case, an infrared emitter is located in one rack, and a radiation receiver is located in the other rack. An electric board is installed inside the case, containing a power supply unit, a shaper of a sequence of bursts of electrical impulses connected to an infrared emitter, and a received signal processing unit connected to a radiation receiver. The housing cavity is filled with a composite sealing material, while the sensor is made with the possibility of installation in the measuring environment with an arched structure at the top, and sections vertically down.

In addition, the sensor's power supply is connected via a cable to an electrical power source outside the sensor.

In addition, said cable is hermetically fixed in a hole made along the axis of the arch.

In addition, the electrical pulse train sequencer is configured to generate rectangular pulse trains with a certain number of pulses in a burst.

The received signal processing unit is configured to process received signals in the form of bursts of rectangular pulses with a certain number of pulses in a burst.

In addition, the electrical board additionally contains an optoelectronic isolation unit, the input of which is connected to the received signal processing unit, and the output of the optoelectronic isolation unit is the output of the sediment sensor.

BRIEF DESCRIPTION OF THE DRAWINGS

In FIG. 1 shows a general view of the sediment sensor.

Figure 2 shows a block diagram of the electrical part of the sediment sensor

In FIG. 3 shows diagrams explaining the operation of the sediment sensor;

diagram a) shows the pulse diagram generated by the pulse shaper,

diagram b) shows the pulse diagram at the output of the received signal processing unit in the absence of sediment.

In FIG. 4 shows a figure illustrating an example of a sediment sensor installation scheme.

UTILITY MODEL IMPLEMENTATION OPTIONS

The sediment sensor (Fig. 1 and Fig. 2) includes a hollow body 1 made of PTFE, made in the form of a single arch structure with an arch 2 and two posts 3 located opposite each other, attached at the ends of the arch 2. An infrared emitter 4 is located in one post 3 , for example, an LED, and in another rack 3 a radiation receiver 5 in the form of a photocell. Inside the housing 1, an electrical board 6 is installed, containing a power supply unit 7, a shaper 8 of a sequence of bursts of electrical pulses connected to an infrared emitter 4, and a block 9 for processing signals received from the receiver 5 of radiation signals.

In a particular case of a precipitation sensor, the power supply unit 7 may contain a voltage regulator that converts the input supply voltage into the voltage used in the signaling device, which increases the versatility of its application.

The shaper 8 packs of electrical pulses generates pulses of the same polarity U (Fig. 3 - a) of a certain frequency.

Block 9 for processing received signals is connected to the output of radiation receiver 5 and contains a logic analyzer of electrical pulses received by receiver 5, a Schmitt trigger and a transistor switch (not shown in the figures).

A feature of the sediment sensor is that the electrical board 6 additionally contains an optoelectronic isolation unit 10, the input of which is connected to the received signal processing unit 9, and the output of the optoelectronic isolation unit 10 is the sensor output.

The cavity of the housing 1 is filled with a composite sealing material 12, such as a composite hardening resin. In this case, the sensor is made with the possibility of installation in the measuring environment with an arched structure at the top, and racks 3 vertically down. At the top of the arched structure, a sealed cable entry 11 is made for hanging the sensor and placing electrical conductors for electrically supplying the sensor and outputting measurement signals.

The technology of manufacturing and assembling a fluoroplastic body 1 with filling 12 with a composite hardening resin makes it possible to obtain a non-separable, sealed, and resistant to external mechanical stress and pollution product, which increases its reliability and durability of use.

The shape of the body 1 of the sediment sensor (Fig. 4) is made in such a way that between the sensitive elements of the sensor, the infrared emitter and the radiation receiver installed in the racks 3, a wide controlled zone is formed, the performance of which is practically not affected by partial pollution, since the total optical density in the infrared range of the entire space between the posts 3. The sediment sensor is installed vertically, so this shape of the housing 1 also allows the settling particles to evenly fill the space between the posts 3, without creating a void under the sediment sensor housing 1 itself.

The sediment sensor operates on the principle of measuring the optical permeability of the medium in the infrared range, located between the infrared emitter 4 and the receiver 5 of the radiation signals.

When the sediment sensor is connected to the power supply, the shaper 8 of bursts of electrical impulses begins to generate bursts of rectangular pulses of a certain frequency, Fig. 3 - a), which are fed to an infrared emitter that generates bursts of light pulses in the infrared range. The use of pulsed radiation, in contrast to constant, provides less power consumption, lower heating of the surface of the body 1 at the infrared emitter 4, which reduces the formation of a biological film and mineral deposits on the body 1.

Light pulses, having passed through the analyzed medium, fall on a photodetector, which converts them again into electrical impulses. Packets of electrical pulses are fed to the input of the block 9 for processing signals received from the receiver 5 of radiation signals, which registers the presence of pulses of a given frequency, and, depending on the number of registered pulses, generates a signal that the specified threshold of the optical permeability of the medium has been exceeded, Fig 3 - b). The use of a pulse signal of a given frequency in tandem with the received signal processing unit 9, also tuned to a given frequency, can significantly increase the noise immunity of the measuring path.

In block 9 for processing the received signals, the received signal is averaged. This eliminates false triggering of the sediment sensor in the boundary zone of the optical permeability of the medium, as well as from floating debris and other disturbances.

INDUSTRIAL APPLICABILITY

The sediment sensor can be used to determine the level of bulk materials, as well as sediment in the aquatic environment: clay, silt, sand, sludge and other sediments.

Claims (6)

1. Sediment sensor, including a hollow body made of PTFE, made in the form of a single arch structure with an arch and two posts located opposite each other, attached at the ends of the arch, with an infrared emitter located in one post, and a radiation receiver in the other post, inside the body contains an electric board containing a power supply, a shaper of the sequence of bursts of electrical impulses connected to an infrared emitter, and a received signal processing unit connected to a radiation receiver, and the cavity of the body is filled with a composite sealing material, while the sensor is configured to be installed in an arched measuring environment structure at the top and sections vertically down. 2. The sediment sensor according to claim 1, characterized in that the sensor power supply is connected via a cable to an electrical power source outside the sensor. 3. Sediment sensor according to claim 2, characterized in that said cable is hermetically fixed in a hole made along the axis of the arch. 4. The sediment sensor according to claim 1, characterized in that the electric pulse train sequencer is configured to generate rectangular pulse bursts with a certain number of pulses in a burst. 5. The sediment sensor according to claim 4, characterized in that the received signal processing unit is configured to process the received signals in the form of bursts of rectangular pulses with a certain number of pulses in a burst. 6. The sediment sensor according to claim 1, characterized in that the electrical board additionally contains an optoelectronic isolation unit, the input of which is connected to the received signal processing unit, and the output of the optoelectronic isolation unit is the output of the sediment sensor.

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