JP3055852U - Portable tank level sensor - Google Patents

Abstract

(57) [Summary] [Problem] To provide a portable tank level sensor that can easily detect a liquid level regardless of an installation position of an object for detecting a liquid level. SOLUTION: The liquid level detecting unit 3 includes an emitting unit that emits an ultrasonic wave, and a wave receiving unit that receives a reflected wave of the ultrasonic wave emitted from the emitting unit reflected on an inner wall of a closed container. The control unit 8 amplifies the reflected wave received by the liquid level detecting unit 3, and the liquid exists when the interval of continuously receiving the reflected wave of a certain level is within a predetermined time. The operation indicator lamp 4 is turned on, and if it is equal to or longer than a predetermined time, the operation indicator lamp 4 is kept off.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a portable tank level sensor, and more particularly to a liquid level detection mechanism for detecting a liquid level in a tank without contact.

[0002]

[Prior art]

 Conventionally, in this type of liquid level detection mechanism, as shown in FIG. 4, in order to detect the liquid level of the liquid 11 stored in a closed container 10 such as a tank or a cylinder, the zenith or the zenith of the closed container 10 is detected. The ultrasonic sensors 21 to 23 are fixed to the side walls by screwing, welding, band, or the like.

When the liquid level of the liquid 11 is detected by the ultrasonic sensor 21, the ultrasonic wave is constantly irradiated on the liquid 11 from the ultrasonic sensor 21, and the ultrasonic wave is reflected on the surface of the liquid 11 and the ultrasonic wave is reflected. The time from when the reflected wave returns to the sensor 21 (the time from when the reflected wave is received until the next reflected wave returns) is measured by a measuring device (not shown), so that the liquid 11 from the zenith of the closed container 10 is measured. The distance to the surface of the liquid 11 is calculated, and the liquid level of the liquid 11 is detected based on the calculated distance.

When the liquid level of the liquid 11 is detected by the ultrasonic sensors 22 and 23, the ultrasonic sensors 22 and 23 are fixed at predetermined positions on the side wall of the closed container 10. If the liquid 11 is stored to the position, the ultrasonic wave returns faster than when the liquid 11 is not stored to that position, so that the presence of the liquid 11 is displayed on a measuring device (not shown). Also in this case, the presence or absence of the liquid 11 is determined by measuring the time until the reflected wave from the side wall of the closed container 10 returns to the ultrasonic sensors 22 and 23.

For example, if the display corresponding to the ultrasonic sensor 22 is not turned on and the display corresponding to the ultrasonic sensor 23 is turned on, the liquid 11 is moved from the position corresponding to the ultrasonic sensor 23 in the closed container 10 to an ultra-high level. It is confirmed that the sound wave sensor 22 has entered any position up to the position corresponding to the sound wave sensor 22.

[0006]

[Problems to be solved by the invention]

 In the conventional liquid level detection mechanism described above, the ultrasonic sensor is fixed to a closed container such as a tank or a cylinder and the liquid level in the closed container is measured, so the liquid level in the portable closed container is measured. In order to detect the liquid level, sensors must be attached to a closed container, and a simple liquid level detecting mechanism is desired.

That is, when the portable closed container is placed and cannot be moved from the place to the place where the liquid level detecting mechanism is installed, the liquid level detecting mechanism must be carried to that location. The liquid level detection mechanism must be attached to the closed container, and the liquid level cannot be easily detected.

Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a portable tank level sensor that can easily detect the liquid level regardless of the installation position of the object whose liquid level is to be detected. Is to do.

[0009]

[Means for Solving the Problems]

 The portable tank level sensor according to the present invention includes an emission unit that emits an ultrasonic wave for detecting a liquid level of the liquid in the closed container, and an ultrasonic wave emitted from the emission unit outputs the ultrasonic wave from the inner wall in the closed container. Receiving means for receiving the reflected wave reflected by the air conditioner, detecting means for measuring the interval at which the wave receiving means receives the reflected wave to detect the presence or absence of liquid in the closed container, and the detecting means And a housing that is portable and houses the emission member, the wave receiving member, the detection unit, and the display unit in the same space.

[0010] That is, the portable tank level sensor of the present invention has an emission section that emits an ultrasonic wave for detecting a liquid level, and the ultrasonic wave emitted from the emission section is placed in a closed container such as a tank or a cylinder. The interval between the receiving part that receives the reflected wave reflected by the inner wall of the receiver and the reflected wave that the receiving part receives (the time from receiving this reflected wave to receiving the next reflected wave) The detection unit that measures the presence or absence of liquid in the closed container and the display unit that displays the detection result of the detection unit are housed in the same portable housing.

[0011] With this configuration, the operator presses the housing against the measurement site of the closed container and receives the reflected wave of the ultrasonic wave emitted from the emitting unit at the receiving unit, thereby adjusting the liquid level of the liquid in the closed container. This makes it possible to detect, and it is not necessary to carry the sealed container to the portable tank level sensor, and it is not necessary to attach the portable tank level sensor that has been carried to the mounting position of the sealed container to the sealed container. The liquid level of the liquid can be easily detected.

[0012]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an outer shape of a portable tank level sensor according to one embodiment of the present invention, and FIG. 2 is a diagram showing an internal configuration of the portable tank level sensor according to one embodiment of the present invention.

In these figures, a portable tank level sensor 1 includes a support rubber 2, a liquid level detection unit 3, an operation indicator 4, a power indicator 5, a sensitivity adjustment volume 6, a power switch 7, It comprises a control unit 8 and a rechargeable battery unit 9.

The support rubber 2 serves as a cushion when the portable tank level sensor 1 is pressed against a closed container such as a tank or a cylinder (not shown). The liquid level detection unit 3 includes an emission unit (not shown) that emits an ultrasonic wave, and a wave receiving unit (not shown) that receives an ultrasonic wave emitted from the emission unit reflected on the inner wall of the closed container. Although the light emitting part and the wave receiving part may be separately provided.

The operation indicator 4 indicates the presence or absence of a liquid (not shown) in the closed container. In this embodiment, the light is turned on when the liquid is present in the closed container, and is turned off when the liquid is not present in the closed container.

The power indicator 5 indicates the state of turning on and off the power to the portable tank level sensor 1. The sensitivity adjusting volume 6 is for adjusting the receiving sensitivity of the reflected wave in the liquid level detecting section 3. In this case, the level of the detection level (sensitivity) of the reflected wave can be adjusted by the sensitivity adjustment volume 6.

The power switch 7 turns on and off power from the rechargeable battery unit 9 to the portable tank level sensor 1. The control unit 8 controls turning on and off of the operation indicator lamp 4 according to the interval at which the reflected wave is received by the liquid level detecting unit 3.

That is, the control unit 8 amplifies the reflected wave received by the liquid level detection unit 3 and sets an interval until a certain level of reflected wave is continuously received within a predetermined time. If so, the operation indicator lamp 4 is turned on assuming that the liquid is present, and if it is longer than a predetermined time, the operation indicator lamp 4 is kept off.

FIG. 3 is a diagram showing a use state of the portable tank level sensor 1 shown in FIG. 1 and FIG. A method of using the portable tank level sensor 1 will be described with reference to FIGS.

When the portable tank level sensor 1 checks the presence or absence of the liquid 11 in the closed container 10 such as a tank or a cylinder, if the rough liquid level of the liquid 11 is to be checked, that is, the liquid 11 reaches this position. If it is necessary to check that the power is on, the power switch 7 is turned on, and then the support rubber 2 is pressed against the closed container 10 at that position.

When the power switch 7 is turned on, the ultrasonic wave is always emitted from the liquid level detecting unit 3, and the reflected wave rebounded from the inner wall of the closed vessel 10 is continuously received by the liquid level detecting unit 3. Is done. The control unit 8 amplifies the reflected wave received by the liquid level detection unit 3 and determines whether the amplified signal is equal to or higher than a certain level. The constant level at this time is the level specified by the sensitivity adjustment volume 6.

If the level of the reflected wave is equal to or higher than a predetermined level, the control unit 8 calculates an interval at which the liquid level detection unit 3 receives the reflected wave. The operation indicator lamp 4 is turned on assuming that the liquid 11 exists.

If the interval at which the liquid level detection unit 3 receives the reflected wave is equal to or longer than a predetermined time, the control unit 8 determines that the liquid 11 does not exist in the closed container 10 and turns off the operation indicator lamp 4. Leave it as is.

On the other hand, if the detailed liquid level of the liquid 11 is to be checked, that is, if the position where the liquid 11 is contained is to be checked in more detail than described above, the portable tank level sensor 1 must be placed in the closed container 10. By sequentially changing the pressing position from below the sealed container 10 to above, the presence or absence of the liquid 11 at that position can be detected, so that the liquid level of the liquid 11 can be measured in more detail.

In the example shown in FIG. 3, when the portable tank level sensor 1 is pressed against the closed container 10 at the position (a) after the power switch 7 is turned on, the liquid 11 does not exist in the closed container 10. , The operation indicator 4 remains off.

When the portable tank level sensor 1 is pressed against the closed container 10 at the positions (b) and (c), the operation indicator lamp 4 is turned on because the liquid 11 exists in the closed container 10.

As described above, in the housing of the portable tank level sensor 1 which is portable, the ultrasonic wave is emitted at least to detect the liquid level, and the reflected wave reflected by the inner wall in the sealed container 10 is received. A liquid level detecting unit 2 for detecting the presence or absence of the liquid 11 by measuring an interval at which the reflected wave is received, and turning on or off the operation indicator 4 according to the detection result; By accommodating the operation indicator lamp 4, the operator can detect the liquid level of the liquid 11 in the closed container 10 only by pressing the above-mentioned housing against the measurement site of the closed container 10. Need not be carried to the portable tank level sensor 1 and the portable tank level sensor 1 carried to the mounting position of the closed container 10 does not need to be attached to the closed container 10. liquid Position detection can be easily performed.

In the above description, the case where the liquid is merely contained in the closed container 10 has been described. More specifically, the remaining amount of the liquefied gas such as propane gas is checked, Since the amount of waste liquid in the tank can be checked, and the remaining amount in a sake barrel or a soy sauce barrel can be checked, the use of the tank is not particularly limited.

[0029]

[Effect of the invention]

 As described above, according to the present invention, an emitting unit that emits an ultrasonic wave to detect a liquid level of a liquid in a closed container, and the ultrasonic wave emitted from the emitting unit is reflected by an inner wall in the closed container. Receiving means for receiving the reflected wave, detecting means for measuring the reception interval of the reflected wave at the receiving means to detect the presence or absence of liquid in the closed container, and display for displaying the detection result of the detecting means By storing the means and the portable device in the same portable housing, the liquid level can be easily detected regardless of the installation position of the object whose liquid level is to be detected.

[Brief description of the drawings]

FIG. 1 is a plan view showing an outer shape of a portable tank level sensor according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an internal configuration of a portable tank level sensor according to an embodiment of the present invention.

FIG. 3 is a diagram showing a use state of the portable tank level sensor 1 shown in FIGS. 1 and 2;

FIG. 4 is a diagram showing an example of a liquid level detection of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Portable tank level sensor 2 Support rubber 3 Liquid level detection part 4 Operation indicator light 5 Power indicator light 6 Sensitivity adjustment volume 7 Power switch 8 Control part 9 Rechargeable battery part 10 Hermetic container 11 Liquid

Claims (2)

[Utility model registration claims] An emitting means for emitting an ultrasonic wave for detecting a liquid level of the liquid in the closed container; and an ultrasonic wave emitted from the emitting means receiving a reflected wave reflected on an inner wall in the closed container. Wave receiving means for oscillating, detecting means for detecting the presence or absence of liquid in the closed container by measuring the interval at which the wave receiving means receives a reflected wave, and display means for displaying the detection result of the detecting means A portable tank level sensor having a housing that is portable and houses the emission member, the wave receiving member, the detection means, and the display means in the same space. 2. The portable tank level sensor according to claim 1, further comprising adjusting means for variably adjusting the detection sensitivity of said detecting means.