Ultrasonic liquid level meter structure

Abstract

The utility model provides an ultrasonic liquid level meter structure, which comprises an upper shell, a lower shell, a circuit board, an ultrasonic transducer, a transducer sealing sleeve, a stainless steel pressing plate, an electrode, a waterproof terminal and an RS485 communication line, is mainly applied to sewage pipelines, rainwater pipelines and the interiors of generally large-caliber pipelines, can be matched with some gates, and can be used for sealing the pipelines. The ultrasonic liquid level meter has the advantages of small blind area (generally referring to the blind area of 6cm), self-correction, temperature compensation, high measurement precision and the like, and a microprocessor in the liquid level meter can acquire signals through an electrode when the measured liquid level is in contact with the ultrasonic liquid level meter.

Description

Technical Field

[0001] The utility model relates to the field of ultrasonic measurement, and specifically relates to a structure of an ultrasonic level gauge. Background Art

[0002] An ultrasonic level gauge is a digital level instrument controlled by a microprocessor. In measurement, ultrasonic pulses are emitted by a sensor (transducer). The sound waves are reflected by the liquid surface and then received by the same sensor. They are converted into electrical signals through a piezoelectric crystal, and the distance from the sensor to the surface of the measured liquid is calculated by the time between the emission and reception of the sound waves. Due to its non-contact measurement method and high measurement accuracy, the ultrasonic level gauge is widely used in the measurement of the height of various liquids and solid materials, and plays an important role especially in industrial production, environmental protection monitoring, water treatment and other industrial fields. Summary of the Invention

[0003] The utility model provides a structure of an ultrasonic level gauge. This utility model is mainly applied to sewage pipes and rainwater pipes, generally inside pipes with a relatively large diameter. It can also be paired with some gates to measure the liquid level in front of the gate device for applications such as whether to open or close the gate. It has the advantages of a small blind zone (generally referring to a blind zone of 6 cm), self-correction, temperature compensation, and high measurement accuracy. At the same time, when the measured liquid surface contacts the ultrasonic level gauge, the microprocessor inside the level gauge can obtain signals through the electrodes.

[0004] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A structure of an ultrasonic level gauge, comprising an upper housing, a lower housing, a circuit board, an ultrasonic transducer, a transducer sealing sleeve, a stainless steel pressing plate, electrodes, waterproof terminals, and an RS485 communication line. Its characteristics are:

[0006] The ultrasonic transducer is externally sleeved with a transducer sealing sleeve;

[0007] The ultrasonic transducer is fixed inside the lower housing through a stainless steel pressing plate;

[0008] The stainless steel pressing plate and the lower housing are fixed by screws;

[0009] The number of the electrodes is one pair, which cooperate with the microprocessor on the circuit board to detect whether the liquid surface of the measured liquid contacts the lower housing of the ultrasonic level gauge;

[0010] The lower housing is provided with a pair of electrode mounting holes, and the electrodes are mounted in these mounting holes;

[0011] The circuit board is fixed to the lower housing and is fixed to the lower housing by a buckle;

[0012] The upper housing is made of stainless steel, and the lower housing is made of plastic;

[0013] The upper housing and the lower housing are fixed by screws;

[0014] The waterproof terminal is threadedly connected to the lower housing;

[0015] The circuit board is provided with an RS485 communication module, and the RS485 communication line communicates with the upstream device through the waterproof terminal.

[0016] Advantages of the present utility model:

[0017] (1) For the ultrasonic level gauge structure of the present utility model, an electrode is provided on the lower housing. When the measured liquid level contacts the ultrasonic level gauge, the microprocessor inside the level gauge can obtain signals through the electrode, facilitating the superior device to send relevant instructions.

[0018] (2) For the ultrasonic level gauge structure of the present utility model, a transducer sealing sleeve is sleeved outside the ultrasonic transducer, ensuring the sealing of the ultrasonic transducer and also having the effect of weakening the co-frequency vibration when the transducer emits waves. Description of the drawings

[0019] Attached Figure 1 is a schematic diagram of the structure of an ultrasonic level gauge of the present utility model. Detailed implementation manners

[0020] The technical solution of the present utility model will be further described in detail below in combination with the detailed implementation manners and the description of the drawings.

[0021] As shown in the attached Figure 1 : An ultrasonic level gauge structure includes an upper housing (1), a lower housing (5), a circuit board (7), an ultrasonic transducer (3), a transducer sealing sleeve (4), a stainless steel pressing plate (2), an electrode (6), a waterproof terminal (8), and an RS485 communication line (9).

[0022] A transducer sealing sleeve is sleeved outside the ultrasonic transducer, ensuring the sealing of the ultrasonic transducer and also having the effect of weakening the co-frequency vibration when the transducer emits waves.

[0023] The ultrasonic transducer is fixed inside the lower housing through a stainless steel pressing plate. Specifically, screw fixing posts are provided inside the lower housing. Correspondingly, screw holes are provided on the stainless steel pressing plate, and the stainless steel pressing plate and the lower housing are fixed by screws.

[0024] The lower housing is provided with a pair of electrode mounting holes, and the electrodes are mounted in these mounting holes; the number of electrodes is a pair, which cooperates with the microprocessor on the circuit board to detect whether the liquid level of the measured liquid contacts the lower housing of the ultrasonic level gauge.

[0025] The circuit board is fixed to the lower housing and is fixed to the lower housing by a snap. An RS485 communication module is provided on the circuit board, which can upload the data collected by the liquid level gauge to the upstream device.

[0026] The upper housing is made of stainless steel, and the lower housing is made of plastic; the upper housing and the lower housing are fixed by screws.

[0027] The waterproof terminal is threadedly connected to the lower housing, and the RS485 communication line communicates with the upstream device through the waterproof terminal.

[0028] The ultrasonic liquid level gauge is installed inside pipelines with a larger diameter such as sewage pipelines and rainwater pipelines to measure the liquid height inside the pipeline. The built-in RS485 communication module uploads the collected water information to the upstream device for the upstream device to analyze.

Claims

1. An ultrasonic level meter structure, comprising an upper shell, a lower shell, a circuit board, an ultrasonic transducer, a transducer sealing sleeve, a stainless steel pressing plate, an electrode, a waterproof terminal, and an RS485 communication line, characterized in that: A transducer sealing sleeve is mounted outside the ultrasonic transducer; The ultrasonic transducer is fixed inside the lower housing via a stainless steel pressing plate; The stainless steel pressing plate is fixed to the lower shell by screws; The electrodes are a pair, and cooperate with the microprocessor on the circuit board to detect whether the liquid level of the measured liquid is in contact with the lower housing of the ultrasonic level meter; The lower shell is provided with a pair of electrode mounting holes, and the electrodes are mounted in the mounting holes; The circuit board is fixed to the lower shell and fixed to the lower shell by snap fasteners; The upper shell is made of stainless steel, and the lower shell is made of plastic; The upper shell and the lower shell are fixed by screws; The waterproof terminal is connected to the lower housing by threaded connection; The circuit board is provided with an RS485 communication module, and the RS485 communication line communicates with an upstream device via a waterproof terminal.

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