The discrete sensor sensor

 

The invention relates to the making, in particular to the means of control and measuring the level of liquid and granular media in closed volumes. The discrete sensor sensor includes a protective casing, the switch membrane. The protective cover is made in the form of a hollow rigid support with a longitudinal through groove. The groove is closed by a plate with Windows. In each of the Windows from the inside has a switch on the external side of the membrane. The membrane is made of elastic material, hermetically closes every window, and paired with the spring loaded core switch. The technical result consists in increasing the reliability of the sensor. 3 Il.

The invention relates to the field of instrumentation, in particular to the means of control and measuring the level of liquid and granular media in a confined space.

Known sensor digital sensor containing a tube made of diamagnetic material, a permanent magnet, which is located inside the pipe, a flexible connection, pneumoperitoneum, the flap pnevmoperegruzhatel, the spring attached to the pipe sleeve of elastic material. (A. C. the USSR 1428933, CL G 01 F 23/46, 1988).

Known sensor has a low reliability, low measuring range and the comparator is incostly relatively often fails. Without reconfiguration has only one limit of operation. Does not provide a measure of the level of the liquid, the density of which is less than the density of the ferromagnetic fluid, and does not allow measuring the level of bulk materials.

The closest in technical essence is a discrete sensor sensor containing a protective casing, the switch membrane. (Application for the invention 93025956, CL G 01 F 23/74).

The disadvantage of this sensor is its low reliability. This is because it has an elastic sleeve, which is relatively often fails.

The present invention is to improve the reliability of the sensor.

This task is solved in that in the discrete sensor sensor containing the protective cover, switch membrane, the protective cover is made in the form of a hollow rigid support with a longitudinal through groove, the groove is closed by a plate with Windows, in each of which the inner side of the set switch, and the outside of the membrane, is made of elastic material, which hermetically closes the window, and paired with the spring loaded core switch.

In Fig.1 shows the discrete sensor sensor, front view; Fig.2 - plate, side view, rezisoru 1 with a longitudinal through slot 2, plate with 3 Windows 4, switch 5 (for example, a microswitch, reed switch, etc) mounted on plate 3 from the inner side of each of the Windows 4, the elastic membrane 6, which is tightly mounted on the outer side of the plate 3 in each of the boxes 4 and coupled to a spring-loaded core 7 of the switch 5. Moreover, the number of switches is determined by the number of the measuring ranges.

The sensor operates as follows. In the initial position of the liquid level (or granular material in the tank is below the limit or not. In this case, the switch contacts 5 are open. During filling of the tank when the liquid level reaches the middle of the elastic membrane 6, it will be moved to the side window 4. As with the membrane 6 is associated spring-loaded core 7, it too will move and the contacts of the switch 5 closes. Upon reaching the liquid level of the next membrane is similar to the inclusion of their switch. When draining the fluid movable spring-loaded core 7 will return to the side of the elastic membrane 6 and the contacts of switch 5 opens.

Information about the presence or absence of a liquid or bulk material in the vessel may be transferred in the form of elektricheska the I not only loose materials, but liquids having any density.

The sensor is reliable because of the simplicity and manufacturability of the design.

Claims

The discrete sensor sensor containing the protective cover, switch, membrane, characterized in that the protective casing is made in the form of a hollow rigid support with a longitudinal through groove, the groove is closed by a plate with Windows, in each of which the inner side of the set switch, and the outside of the membrane, is made of elastic material, which hermetically closes the window, and paired with the spring loaded core switch.

 

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