CN211452527U

CN211452527U - Ultrasonic liquid level meter

Info

Publication number: CN211452527U
Application number: CN201922281221.1U
Authority: CN
Inventors: 刘勇
Original assignee: Guangzhou Yu Environmental Protection Technology Co ltd
Current assignee: Guangzhou Yu Environmental Protection Technology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-09-08
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses an ultrasonic wave level gauge, including test probe, still include: the ultrasonic wave energy converter comprises an ultrasonic wave ring energy device, a processor, a temperature compensation unit, an automatic cleaning unit and an output unit. The ultrasonic transducer comprises a piezoelectric crystal piece and an ultrasonic sensor connected with the piezoelectric crystal piece; the processor comprises a single chip microcomputer; the temperature compensation unit comprises a temperature sensor; the automatic cleaning unit comprises a motor with a brush head; the output unit is used for outputting the measurement result of the ultrasonic liquid level meter; the ultrasonic transducer, the temperature compensation unit and the automatic cleaning unit are respectively electrically connected with the processor, and the output end of the processor is electrically connected with the output unit. The ultrasonic liquid level meter at least has the following beneficial effects: 1. the measurement deviation caused by the shielding of foreign matters is avoided; 2. the temperature compensation unit is beneficial to maintaining the measurement precision of the ultrasonic liquid level meter when the environmental temperature changes.

Description

Ultrasonic liquid level meter

Technical Field

The utility model relates to a level gauge technical field specifically is an ultrasonic wave level gauge.

Background

Instruments that measure the level of liquid in a container are called level gauges. The type of the liquid level meter comprises a tuning fork vibration type, a magnetic suspension type, a pressure type, ultrasonic waves, sonar waves, a magnetic turning plate, radar and the like. Among them, the ultrasonic level gauge is a non-contact type measuring instrument, and is widely used because it has an advantage of not directly contacting liquid when measuring a liquid level. Ultrasonic wave level gauge need install on measuring medium, long-time back, and there is steam easily in the bottom of test probe, leads to producing the deviation at the in-process that the level gauge measured, leads to detecting data to have the error. In addition, according to the basic principle of the ultrasonic level meter for measuring the liquid level, when the temperature change in the environment is large, the accuracy of the measurement is affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an ultrasonic wave level gauge with self-cleaning function, temperature compensation function.

According to the utility model discloses an ultrasonic wave level gauge of first aspect embodiment, including test probe, still include: the ultrasonic wave energy converter comprises an ultrasonic wave ring energy device, a processor, a temperature compensation unit, an automatic cleaning unit and an output unit. The ultrasonic transducer comprises a piezoelectric crystal piece and an ultrasonic sensor connected with the piezoelectric crystal piece; the processor comprises a single chip microcomputer; the temperature compensation unit comprises a temperature sensor; the automatic cleaning unit comprises a motor with a brush head; the output unit is used for outputting the measurement result of the ultrasonic liquid level meter; the ultrasonic transducer, the temperature compensation unit and the automatic cleaning unit are respectively electrically connected with the processor, and the output end of the processor is electrically connected with the output unit.

According to the utility model discloses an ultrasonic wave level gauge of some embodiments, include: the output unit further comprises an RS232 communication interface, an RS485 communication interface or a Modbus communication interface.

According to the utility model discloses ultrasonic wave level gauge has following beneficial effect at least: 1. the measurement deviation caused by the shielding of foreign matters is avoided; 2. the temperature compensation unit is beneficial to maintaining the measurement precision of the ultrasonic liquid level meter when the environmental temperature changes.

Drawings

The following is further described with reference to the accompanying drawings and examples.

Fig. 1 is a schematic diagram of the structural principle of the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

The utility model discloses an embodiment of the first aspect, an ultrasonic wave level gauge, including test probe, still include: the ultrasonic wave energy converter comprises an ultrasonic wave ring energy device, a processor, a temperature compensation unit, an automatic cleaning unit and an output unit. The ultrasonic transducer comprises a piezoelectric crystal piece and an ultrasonic sensor connected with the piezoelectric crystal piece; the processor comprises a single chip microcomputer; the temperature compensation unit comprises a temperature sensor; the automatic cleaning unit comprises a motor with a brush head; the output unit is used for outputting the measurement result of the ultrasonic liquid level meter; as shown in fig. 1, the ultrasonic transducer, the temperature compensation unit, and the automatic cleaning unit are electrically connected to the processor, respectively, and an output end of the processor is electrically connected to the output unit.

It can be understood that, under atmospheric pressure, the propagation velocity of ultrasonic waves in the air at normal temperature is about 340m/s, and the liquid level measurement is performed by using an ultrasonic liquid level meter based on the premise that the propagation velocity of ultrasonic waves in a certain medium is a certain value. In practice, the speed of sound varies by about 0.6m/s for every 1 ℃ rise in air temperature. Therefore, if the speed of sound is calculated as a fixed value, the measurement error of the liquid level may be large. The temperature compensation unit of the above embodiment includes a temperature sensor for measuring a temperature change of the environment, and the processor corrects the ultrasonic level meter to further correct a measurement result output by the ultrasonic level meter through the output unit. In addition, under the control of the processor, the automatic cleaning unit performs cleaning treatment on the detection probe, specifically, under the control of the processor, a motor with a brush head of the automatic cleaning unit rotates, so that the cleaning function of the detection probe is realized, and the measurement deviation caused by the shielding of foreign matters is avoided.

Therefore, the ultrasonic level gauge of the above embodiment has the following beneficial effects: 1. the measurement deviation caused by the shielding of foreign matters is avoided; 2. the temperature compensation unit is beneficial to maintaining the measurement precision of the ultrasonic liquid level meter when the environmental temperature changes.

In some embodiments of the present invention, the output unit further includes an RS232 communication interface, an RS485 communication interface, or a Modbus communication interface. The method is favorable for meeting different data output standards.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. An ultrasonic liquid level meter, includes test probe, its characterized in that still includes:

the ultrasonic transducer comprises a piezoelectric crystal piece and an ultrasonic sensor connected with the piezoelectric crystal piece;

the processor comprises a single chip microcomputer;

a temperature compensation unit including a temperature sensor;

an automatic cleaning unit including a motor with a brush head;

the output unit is used for outputting the measurement result of the ultrasonic liquid level meter;

the ultrasonic transducer, the temperature compensation unit and the automatic cleaning unit are respectively electrically connected with the processor, and the output end of the processor is electrically connected with the output unit.

2. An ultrasonic level gauge according to claim 1, wherein the output unit further comprises an RS232 communication interface or an RS485 communication interface or a Modbus communication interface.