CN204043756U - Liquid level height detection device - Google Patents

Abstract

The utility model provides a liquid level detection device, which is located on the liquid surface of a solution tank and is fixed on an inner wall of the solution tank. The liquid level detection device includes a housing with an accommodation space, and the housing has an accommodation space. A light-emitting element is provided on the inner wall to emit light. A gradient color piece is set on the liquid surface and extends upward in the containing space. The gradient color piece can move up and down according to the liquid level to change the gradient color revealed by the light-emitting element. The light intensity of the film is determined by the light intensity of the film. The other inner wall of the housing is also provided with a photosensitive device located on the other side of the gradient color film and relative to the light-emitting element to receive the light from the light-emitting element passing through the gradient color film and adjust the light intensity according to the intensity of the light. Correspondingly, a liquid level height signal is generated. In view of this, the utility model can float on the liquid surface and measure the liquid level height by virtue of the fluctuation height of the liquid level.

Description

Liquid level detection device

technical field

The utility model relates to a detection device, in particular to a liquid level height detection device for detecting the liquid level.

Background technique

Press, general liquid level detectors are widely used in various water storage or oil storage equipment around daily life, such as common drinking fountains, plant water tanks, medical infusion devices, water tower pumping devices, car water tanks or Oil-water storage tanks, oil tanks and other equipment of production machinery enable the liquid level detector to detect the liquid stock through the liquid level, and remind the user to avoid danger.

The liquid height detection devices currently used on the market usually use a thin-film pressure gauge. Place the pressure gauge at the bottom of the liquid and use the measured pressure to convert the height of the liquid. However, the density of the liquid must be known before using the thin-film pressure gauge. , the pressure can be used to accurately convert the liquid height. Furthermore, when the membrane pressure gauge measures the density of a liquid, it must be placed in the liquid. If the measured liquid is corrosive, the membrane pressure gauge is likely to be corroded, and the cost of the membrane pressure gauge is high. The price is quite expensive.

In view of this, the utility model aims at the lack of the above-mentioned prior art, and proposes a low-cost liquid level detection device that does not need to consider the liquid density and does not need to be placed in the liquid, so as to effectively overcome the above-mentioned problems. question.

Utility model content

The main purpose of this utility model is to provide a liquid level detection device, which can float on the liquid surface, measure the liquid level height by means of the fluctuation height of the liquid level, and can effectively prevent the liquid level detection device from being placed in the liquid to measure the liquid height. , to avoid the possibility of being corroded by corrosive liquids.

Another object of the present invention is to provide a liquid level detection device, which has a simple structure, low manufacturing cost and high production efficiency.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A liquid level detection device, which is located on the liquid surface of a solution tank and fixed on an inner sidewall of the solution tank, is characterized in that the liquid level detection device comprises:

A housing, which is provided with an accommodating space;

A light emitting element is arranged on an inner side wall of the casing to generate light;

A gradient color chip is arranged on the liquid surface and extends upwards to be located in the accommodating space. The gradient color chip floats up and down according to the liquid surface to change the light intensity of the light-emitting element passing through the gradient color chip weak; and

A photosensitive device is arranged on the other inner wall of the casing, on the other side of the gradient color film and opposite to the light-emitting element. The photosensitive device receives the light from the light-emitting element passing through the gradient color film, and according to the The strength corresponds to generate a liquid level height signal.

Said liquid level detection device, wherein: the lower end of the gradient color film is also provided with a floating element.

Said liquid level detection device, wherein: the floating element is a floating plate.

The liquid level detection device, wherein: the photosensitive device is also electrically connected to a signal line, so that the photosensitive device is electrically connected to a host, and the host receives the liquid level signal from the photosensitive device to analyze and display the The relative height of the liquid level.

The liquid level detection device, wherein: the host is a portable terminal.

The liquid level detection device, wherein: the photosensitive device is a photoresistor.

Said liquid level detection device, wherein: the light-emitting element is a light-emitting diode.

Said liquid level detection device, wherein: the color of the gradient color chip gradually becomes lighter from bottom to top.

Said liquid level detection device, wherein: the color of the gradient color chip gradually becomes lighter from top to bottom.

Said liquid level detection device, wherein: the outer side of the casing is further provided with a fixing element, so as to fix the casing to the inner side wall of the solution tank.

Said liquid level detection device, wherein: it also includes a light-shielding plate, which is arranged on the bottom of the housing, and a perforation is provided on the light-shielding plate, so that the gradient color film can pass through the light-shielding plate to the accommodating space middle.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages that the utility model can float on the surface of the liquid, measure the height of the liquid level by means of the fluctuation height of the liquid level, and can effectively prevent the liquid level detection device from being placed. The height of the liquid is measured in the liquid, so the height detection device can be prevented from being corroded by the corrosive liquid. It is widely used in measuring the height of the liquid level, and the utility model also has the advantages of simple structure, low manufacturing cost and high production efficiency.

In order to make your examining committee members have a further understanding and understanding of the structural features and the achieved effects of the utility model, I would like to provide a better embodiment diagram and a detailed description, as follows.

Description of drawings

Fig. 1 is the perspective view of the utility model embodiment;

Fig. 2 is the sectional schematic view of the utility model embodiment;

Fig. 3 is the schematic diagram that the utility model embodiment is installed in the solution tank;

Fig. 4 and Fig. 5 are schematic diagrams of the usage state of the embodiment of the utility model.

Explanation of reference signs: 1-liquid level detection device; 10-solution tank; 20-housing; 22-fixed element; 24-accommodating space; 30-luminous element; 40-gradient color film; ; 50-photosensitive device; 52-signal line; 60-shading plate; 62-perforation.

Detailed ways

Please refer to Fig. 1 to Fig. 3, as shown in the figure, it is the liquid level detection device 1 of the present utility model, and it can be arranged on the liquid level of the liquid in a solution tank 10, and is fixed on an inner side of the solution tank 10 Wall, as shown in the figure, the liquid level detection device 1 includes a housing 20, an accommodating space 24 is provided in the housing 20, and a fixing element 22 is provided on the outside of the housing 20, so that the housing 20 is fixed by the fixing element 22 Be fixed on the inner sidewall of the solution tank 10. In this embodiment, the fixed element 22 is a clamp to be clamped on the side wall of the solution tank 10, but the fixed component 22 can also be a magnet except that it can be a clamp. At this time, the solution A magnetic element or an iron sheet etc. needs to be set on the tank 10, so that the fixing element 22 is adsorbed on the magnetic element or iron sheet on the solution tank 10; It can be a light-emitting diode to generate light to a gradient color film 40; wherein a floating element 42 is provided at the bottom of the gradient color film 40, which can be a floating plate, so that the gradient color film 40 floats in the liquid through the floating element 42 The liquid surface of the tank 10, and the gradient color chip 40 extends upwards and is located in the accommodating space 24. Since the color of the gradient color chip 40 gradually becomes lighter from bottom to top, or gradually becomes lighter from top to bottom, the present embodiment In the above example, the color of the gradient color film 40 gradually becomes lighter from bottom to top. Therefore, when the gradient color film 40 floats up and down with the liquid surface by using the floating element 42, the light emitted by the light emitting element 30 can pass through the gradient color film. Intensity changes, so that the transmitted light is transmitted to a photosensitive device 50; in this embodiment, the photosensitive device 50 is a photosensitive resistor, and the photosensitive device 50 is arranged on the other side wall of the housing 20, so as to be located in the gradient color film The other side of 40 is opposite to the light-emitting element 30, so that the photosensitive device 50 receives the light of the light-emitting element 30 passing through the gradient color film 40, so as to produce a liquid according to the intensity of light emitted from the light-emitting element 30 through the gradient color film 40. height signal.

The photosensitive device 50 is also electrically connected to a signal line 52, and the signal line 52 is electrically connected to the photosensitive device 50 and a host (not shown in the figure), so that the host receives the liquid level signal from the photosensitive device 50 to analyze and display the level of the liquid level. Relative height, showing the percentage of the liquid level, where the host can also be a portable terminal.

In addition, there is a light-shielding plate 60 at the bottom of the housing 20, and a perforation 62 is provided on the light-shielding plate 60, so that the gradient color film 40 can pass through the light-shielding plate 60 and extend into the accommodating space 24 of the housing 20. So that the gradient color film 40 can move up and down by means of the liquid surface without being restricted by the shading plate 60 . The purpose of using the light-shielding plate 60 is to shield external light, so as to avoid external light penetrating into the accommodating space 24 and affecting the measurement result of the photosensitive device 50 .

After the above description of the structure of the liquid level detection device, continue to illustrate the embodiment of the utility model in use, please continue to refer to Fig. 3, as shown in the figure, the example solution tank 10 is a plant nutrient tank in the present embodiment, and the The liquid level detection device 1 is fixed on the inner side wall of the solution tank 10 by a fixing element (not shown in the figure). Next, please cooperate with reference to FIG. 4 . become shallower, so when the liquid level drops, the floating element 42 drives the gradient color film 40 to follow the liquid level down, and the light-colored part of the gradient color film 40 will slowly move to the front of the light-emitting element 30, so that the light-emitting element 30 passes through the gradient The light of the color chip 40 becomes stronger gradually, and the photosensitive device 50 receives it and generates a liquid level signal corresponding to the intensity of the light to the host (not shown in the figure), and the host analyzes the liquid level signal and displays the percentage of the liquid level. Next, please refer to FIG. 3 and FIG. 5. If the liquid level rises, the gradient color film 40 will rise with the help of the floating element 42, so that the dark part of the gradient color film 40 will move to the front of the light emitting element 30, so that the transparent gradient The light from the layer color film 40 becomes weaker gradually, and the photosensitive device 50 generates a corresponding liquid level height signal after sensing the weaker light and transmits it to the host, so that the host can analyze and display the height percentage of the light.

In addition, if the color depth of the gradient color film 40 gradually becomes lighter from top to bottom, the change of light is just opposite to the above-mentioned change, that is, the weakening of the light passing through the gradient color film 40 indicates that the liquid level is low, If the light that penetrates the gradient color film 40 is stronger, it means that the liquid level is higher, and the rest of the usage status and action are the same as above, so the description will not be repeated.

Of course, the above-mentioned host can also be connected to the smart phone signal, so that the liquid level signal can be transmitted to the smart phone through wireless network or bluetooth, so that the user can use the smart phone to monitor the change of the water level at any time.

In summary, the utility model can float on the surface of the liquid, measure the height of the liquid level by virtue of the fluctuation height of the liquid level, and can effectively prevent the liquid level detection device from being placed in the liquid to measure the height of the liquid, so the height detection device can be avoided The corrosive liquid corrodes and is widely used in measuring the height of the liquid level, and the utility model also has the advantages of simple structure, low manufacturing cost and high production efficiency.

Only the above-mentioned ones are only preferred embodiments of the present utility model, and are not intended to limit the implementation scope of the present utility model. Therefore, all equal changes or modifications based on the features and spirit described in the scope of application of the utility model shall be included in the scope of patent application of the utility model.

Claims (11)

1. A liquid level detection device, which is positioned on the liquid surface of a solution tank, and is fixed on an inner sidewall of the solution tank, is characterized in that, the liquid level detection device comprises: A housing, which is provided with an accommodating space; A light emitting element is arranged on an inner side wall of the casing to generate light; A gradient color chip is arranged on the liquid surface and extends upwards to be located in the accommodating space. The gradient color chip floats up and down according to the liquid surface to change the light intensity of the light-emitting element passing through the gradient color chip weak; and A photosensitive device is arranged on the other inner wall of the casing, on the other side of the gradient color film and opposite to the light-emitting element. The photosensitive device receives the light from the light-emitting element passing through the gradient color film, and according to the The strength corresponds to generate a liquid level height signal. 2. The liquid level detection device according to claim 1, characterized in that: a floating element is provided at the lower end of the gradient color film. 3. The liquid level detection device according to claim 2, wherein the floating element is a floating plate. 4. The liquid level detection device according to claim 1, characterized in that: the photosensitive device is also electrically connected to a signal line, so that the photosensitive device is electrically connected to a host, and the host receives the liquid level of the photosensitive device Altitude signal to analyze and display the relative height of the liquid level. 5. The liquid level detection device according to claim 4, wherein the host is a portable terminal. 6. The liquid level detection device as claimed in claim 1, wherein the photosensitive device is a photoresistor. 7. The liquid level detection device according to claim 1, wherein the light emitting element is a light emitting diode. 8. The liquid level detection device according to claim 1, wherein the color of the gradient color chip gradually becomes lighter from bottom to top. 9. The liquid level detection device according to claim 1, wherein the color of the gradient color chip gradually becomes lighter from top to bottom. 10 . The liquid level detection device as claimed in claim 1 , wherein a fixing element is provided on the outer side of the housing to fix the housing to the inner wall of the solution tank. 11 . 11. The liquid level detection device according to claim 1, further comprising a shading plate disposed on the bottom of the casing, and a perforation is provided on the shading plate so that the gradient color film is pierced The light-shielding plate is inserted into the accommodating space.