CN202126296U - Solid-liquid light sensation level meter - Google Patents

Abstract

The utility model relates to a solid-liquid photosensitive level gauge, which belongs to the field of instruments and meters. The base of the utility model is provided with a hollow column, and the hollow column is provided with a plugboard, and the plugboard is provided with a hole along the center line of the vertical direction, and a photoresistor is fixedly installed in the hole; The plate is provided with a hole along the center line in the vertical direction, and a light-emitting diode is fixedly installed in the hole. A scale value is set on the side wall of the fixed plate, and each scale value corresponds to a light-emitting diode. The photoresistor communicates with the light-emitting diode through the control circuit connect. The utility model has the advantages of simple structure and low manufacturing cost; direct measurement is adopted, and the measurement is accurate and the circuit stability is good; multi-function measurement is realized to achieve the effect of one meter with multiple functions; LED display is adopted, and power consumption is low; maintenance cost is low and maintenance is convenient.

Description

Solid-liquid photosensitive level meter

technical field

The utility model relates to a solid-liquid light-sensitive level gauge, which belongs to the field of instruments and meters.

Background technique

At present, capacitive level gauges are most widely used in solid powder measurement. However, it requires that the shape of the silo is regular, generally cylindrical, and the silo wall uses a metal wall as the external electrode, which increases the cost and technical requirements of the silo construction; for some other level gauges (such as float type, buoy type), Its measurement function is relatively simple.

Contents of the invention

The purpose of the utility model is to provide a solid-liquid light-sensing level gauge that can measure both solid powder and liquid materials, and at the same time reduces the requirements on the shape and material of the silo.

Technical solution:

The utility model comprises: a base and a junction box base, the base is provided with a hollow column, the hollow column is provided with a plugboard, the plugboard is provided with a hole along the center line of the vertical direction, and a photosensitive resistor is fixedly installed in the hole; The base of the box is provided with a fixed plate, and the fixed plate is provided with a hole along the center line in the vertical direction, and a light-emitting diode is fixedly installed in the hole, and a scale value is set on the side wall of the fixed plate, and each scale value corresponds to a light-emitting diode. The photoresistor is connected with the light emitting diode through the control circuit.

A shading sleeve or a shading tube is covered on the hollow column.

The structure of the utility model adopts a photoresistor on the plug-in board in the hollow column. As long as the light of the photoresistor is blocked by the material, the height of the material can be displayed, which overcomes the restrictions on the shape, material and material properties of the silo in the prior art. Changeable restrictions. It can be applied to solid powder measurement, such as dry mineral powder, alloy powder, lime powder, dry cement, grain, coal powder and other level measurement, and can also be applied to liquid measurement.

The specific advantages are as follows:

Simple structure and low manufacturing cost

Using direct measurement, accurate measurement, good circuit stability

Realize multi-functional measurement and achieve the effect of one meter with multiple functions

4. Using LED display, low power consumption

5. Low maintenance cost and easy maintenance

6. Wide range of use

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of circuit connection;

Figure 3 Schematic diagram of solid powder measurement;

Figure 4 is a schematic diagram of liquid level measurement in an open container;

Figure 5 Schematic diagram of tank liquid level measurement.

Detailed ways

The base 1 of the utility model is provided with a hollow column 3, and a plugboard 4 is installed in the hollow column 3, and the plugboard 4 is provided with holes at equal intervals along the center line in the vertical direction, and a photoresistor 5 is fixedly installed in the hole, and the photoresistor The part of the hollow column facing the device 5 adopts a material with good light transmission; the junction box base 2 is provided with a fixed plate 6, and the fixed plate 6 has the same number of holes as the photoresistor 5 on the center line in the vertical direction. A light-emitting diode 7 is fixedly installed in the hole, and a scale value 9 is provided on the right side of the fixed plate 6. The scale value 9 marks the actual height value of the photoresistor 5 from the bottom in turn, and each scale value 9 corresponds to a light-emitting diode 7. One end of the photoresistor 5 is connected in parallel with the negative pole of the power supply through a wire, and the other end is connected with the positive pole of the power supply through a resistor. The long leg of the light-emitting diode 7 is connected to the resistor, and the short leg is connected to the Y port of the 74LS00 NAND gate.

The utility model measures solid powder:

When measuring solid powder, fix the base 1 to the bottom of the silo.

Measurement process: the photoresistor 5 and the gate circuit form the control body, the light-emitting diodes 7 are used as actuators, and each light-emitting diode 7 corresponds to one photoresistor 5 . When the photoresistor 5 is buried by the material, the light intensity decreases, and the resistance value of the photoresistor 5 increases, and the corresponding light-emitting diode 7 is energized to emit light through the gate circuit. At this time, the scale value 9 corresponding to the light-emitting diode 7 is the silo The actual height of the material in the Turn on the incandescent lamp to provide light at night or in low light conditions.

The utility model measures the liquid level in the open container:

When measuring the liquid in the open container, fix the base 1 on the bottom of the silo, and install the shading cover (liquid density > shading cover density) on the hollow column 3. It is required that the hollow column 3 is well sealed to prevent the liquid from contacting the photoresistor. 5 contacts.

Measurement process: With the injection of liquid, the shading sleeve will float on the surface of the liquid, and will float up and down following the change of the liquid height. At the position of the shading sleeve, the photosensitive resistor 5 is blocked by the shading sleeve, and the light intensity decreases. When the value increases, the corresponding light-emitting diode 7 is energized to emit light through the gate circuit. At this time, the scale value 9 corresponding to the light-emitting diode 7 is the depth of the liquid in the container. Turn on the incandescent lamp to provide light at night or in low light conditions.

The utility model measures the liquid level of the material tank:

When measuring liquid in a material tank with a small diameter and poor light transmission, the base 1 at the bottom of the hollow column 3 is removed, the hollow column 3 is suspended above the material tank, and the bottom end is inserted into the light-shielding cylinder (liquid density > light-shielding cylinder density).

Measurement process: With the injection of liquid, the shading cylinder floats on the surface of the liquid, and floats up and down following the change of the height of the liquid. When the photoresistor 5 is blocked by the shading cylinder, the light intensity decreases, and the resistance of the photoresistor 5 increases, passing through the gate circuit Make the corresponding diode 7 energize and emit light, and the corresponding scale value 9 at this time is the depth of the feed liquid in the feed tank. Turn on the incandescent lamp to provide light at night or in low light conditions.

Claims (2)

1. Solid-liquid light-sensing level meter, including: base (1), junction box base (2), characterized in that, the base (1) is provided with a hollow column (3), and the hollow column (3) is provided with an insert The board (4), the inserting board (4) is provided with a hole along the center line of the vertical direction, and the photoresistor (5) is fixedly installed in the hole; the junction box base (2) is provided with a fixed plate (6), fixed Plate (6) is provided with hole along the center line of vertical direction, and light emitting diode (7) is fixedly installed in the hole, scale value (9) is established on the side wall of fixed plate (6), each scale value (9 ) corresponds to a light emitting diode (7), and the photosensitive resistor (5) is connected with the light emitting diode (7) through the control circuit. 2. The solid-liquid photosensitive level gauge according to claim 1, characterized in that, the hollow column (3) is covered with a light-shielding sleeve or a light-shielding cylinder.

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