CN105784069A - Large liquid storage tank liquid level measuring device based on wireless transmission - Google Patents

Abstract

The invention relates to a liquid level measuring device, in particular, a large liquid storage tank liquid level measuring device based on wireless transmission, which includes two parts: a transmitting end and a receiving end. The transmitting end consists of a transmitting end power module, The transmitting end main control module, ultrasonic transceiver module, alarm prompt circuit module, temperature clock module, wireless transmitting module, the receiving end is composed of receiving end power supply module, receiving end main control module, wireless receiving module, liquid crystal display module, the transmitting end main The control module is respectively connected with the transmitter power module, the sound wave transceiver module, the alarm prompt circuit module, the temperature clock module, and the wireless transmitter module, and the receiver main control module is respectively connected with the receiver power module, the wireless receiver module, and the liquid crystal display module. A temperature sensor is included to measure the temperature in the oil tank, and the receiving end is also connected to an external computer in a wireless or wired manner.

Description

A large liquid storage tank liquid level measurement device based on wireless transmission

technical field

The invention relates to a liquid level measuring device, in particular to a large liquid storage tank liquid level measuring device based on wireless transmission.

Background technique

In industrial production, such as petroleum, chemical industry, hydrology, meteorology and many other fields, in order to measure the storage volume of materials and facilitate the monitoring of materials, it is an important link to measure the liquid level. The early manual ruler measurement was time-consuming and laborious, and the measurement accuracy was low; although the mechanical measurement device has high precision, its working life is low and the installation is relatively complicated; there is also the radar level gauge, which is an advanced The liquid level gauge has high measurement accuracy, but the cost is too high. In recent years, non-contact liquid level measurement technology has been more and more widely used, among which ultrasonic liquid level measurement technology has developed rapidly and is widely used. The basic principle of ultrasonic measurement of liquid level is that the ultrasonic pulse signal sent by the ultrasonic probe "propagates in the gas" and is reflected after reaching the interface of the liquid. Velocity and travel time can calculate the travel distance and thus the liquid level height. The ultrasonic measurement method has strong reliability and high precision, avoids frequent maintenance and has a certain price advantage.

In actual industrial production, the liquid stored in the liquid storage tank may be flammable, explosive, highly corrosive, volatile, and even toxic liquids. It is necessary to accurately measure the liquid level of these liquids and detect their Liquid level height. Using non-contact ultrasonic liquid level measurement, accurate measurement of liquid level height can be realized. The measuring device has strong working reliability and high precision, avoids frequent overhaul and maintenance, and has a certain price advantage.

Contents of the invention

The purpose of the present invention is to provide a highly reliable, high-precision liquid level measuring device for industrial production that avoids frequent maintenance. The present invention is specifically a large liquid storage tank liquid level measuring device based on wireless transmission. It includes two parts, the transmitting end and the receiving end. The transmitting end is composed of the transmitting end power module, the transmitting end main control module, the ultrasonic transceiver module, the alarm prompt circuit module, the temperature clock module, and the wireless transmitting module. The receiving end is composed of the receiving end power module, The main control module of the receiving end is composed of a wireless receiving module and a liquid crystal display module. It is respectively connected with the power module of the receiving end, the wireless receiving module, and the liquid crystal display module, and also includes a temperature sensor for measuring the temperature in the oil tank, and the receiving end is also connected to an external computer through wireless or wired means.

In this technical solution, the sending end is installed on the top of the liquid storage tank, and then the receiving end is installed in the monitoring room. The distance between the sending end and the receiving end cannot exceed the maximum transmission distance of the wireless transmission unit. The temperature sensor measures the current temperature in the liquid storage tank. , using the time taken by the ultrasonic transceiver module from sending the signal to receiving the signal, and then calculating the propagation distance according to the propagation speed at the current temperature, so as to obtain the liquid level height, the transmitter transmits the measured height and temperature data through wireless transmission To the receiving end, the receiving end displays the temperature through the LCD screen, and sends the data to the computer through USB, so as to realize monitoring and storage.

As a further improvement of the present invention, the ultrasonic transceiver module adopts the KS103 ultrasonic transceiver module, the maximum range of the KS103 ultrasonic transceiver module is 8 meters, the distance measurement accuracy is about 3mm, the detection frequency can reach 500Hz, and the adjustable filter noise reduction technology is adopted, which is less affected by the power supply. Small, it is an industrial-grade ultrasonic module.

As a further improvement of the present invention, the main control module of the transmitting end and the main control module of the receiving end adopt C51 series single-chip microcomputers, and the C51 series single-chip microcomputers are a kind of single-chip microcomputers with high performance, low power consumption and strong anti-interference ability. It can download programs and other functions through the serial port, and the speed is fast, and the application field is more and more extensive.

As a further improvement of the present invention, the transmitter power module and the receiver power module are completed by using a 220VAC to 5VDC power adapter, and the AMS1117 voltage regulator chip is used to convert 5V to 3.3V, so that the circuits can use different power supplies.

As a further improvement of the present invention, the alarm prompt circuit module adopts a buzzer, and when the liquid level or temperature exceeds the safe liquid level of the liquid storage tank, the device will alarm.

As a further improvement of the present invention, the temperature sensor adopts DS18B20 temperature sensor, the wireless transmitting module and the wireless receiving module are composed of NRF24L01 single-chip radio frequency transceiver chip, and the liquid crystal display module adopts TFT liquid crystal touch screen to control and display data information. The DS18B20 temperature sensor measures the temperature in the liquid storage tank, and obtains the accurate ultrasonic speed in real time, thereby making the liquid level measurement more accurate. The NRF2401 single-chip radio frequency transceiver chip has low voltage operation, high speed, low power consumption, low cost, and is easy to develop And other features, realize the real-time liquid level height, temperature and corresponding time are sent to the receiving end.

Beneficial effects of the present invention: the present invention uses ultrasonic waves to measure the liquid level of large liquid tanks, has strong working reliability and high precision, avoids frequent maintenance, and has certain cost advantages. At the same time, through wireless transmission, it is easy to install and highly flexible in personnel operation.

Description of drawings

FIG. 1 is a schematic structural diagram of a transmitting end of the present invention.

Fig. 2 is a schematic structural diagram of the receiving end of the present invention.

detailed description

In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

Embodiment: As shown in Figure 1 and Figure 2, a large-scale liquid storage tank liquid height measurement device based on wireless transmission, including two parts, the transmitting end and the receiving end, the transmitting end is controlled by the power module of the transmitting end and the main control of the transmitting end Module, ultrasonic transceiver module, alarm prompt circuit module, temperature clock module, wireless transmission module, the receiving end is composed of receiving end power module, receiving end main control module, wireless receiving module, liquid crystal display module, and the transmitting end main control module is respectively connected with The transmitter power module, sound wave transceiver module, alarm prompt circuit module, temperature clock module, and wireless transmitter module are connected, and the main control module of the receiver is respectively connected with the receiver power module, wireless receiver module, and liquid crystal display module. To measure the temperature in the oil tank, the receiving end is also connected to an external computer by wireless or wired means.

In this embodiment, the sending end is installed on the top of the liquid storage tank, and then the receiving end is installed in the monitoring room. The distance between the sending end and the receiving end cannot exceed the maximum transmission distance of the wireless transmission unit. The temperature sensor measures the current temperature in the liquid storage tank. Using the time taken by the ultrasonic transceiver module from sending the signal to receiving the signal, the propagation distance can be calculated according to the propagation speed at the current temperature, so as to obtain the liquid level height, and the transmitter transmits the measured height and temperature data to the The receiving end, the receiving end displays the temperature through the LCD screen, and sends the data to the computer through the USB, so as to realize monitoring and storage.

In this embodiment, the ultrasonic transceiver module adopts KS103 ultrasonic transceiver module; the main control module of the transmitting end and the main control module of the receiving end adopt C51 series single-chip microcomputer; The voltage regulator chip converts 5V to 3.3V for the circuit to use different power supplies; the alarm prompt circuit module uses a buzzer, and when the liquid level or temperature exceeds the safe liquid level of the liquid storage tank, the device will alarm; the temperature sensor adopts DS18B20 temperature sensor, wireless transmitting module and wireless receiving module are composed of NRF24L01 single-chip radio frequency transceiver chip, and the liquid crystal display module adopts TFT liquid crystal touch screen to control and display data information.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A large liquid storage tank liquid height measuring device based on wireless transmission, characterized in that: it includes two parts, a transmitting end and a receiving end, and the transmitting end is composed of a transmitting end power supply module, a transmitting end main control module, an ultrasonic transceiver module, an alarm prompt circuit module, a temperature clock module, and a wireless transmitting module. The receiving end is composed of a receiving end power module, a receiving end main control module, a wireless receiving module, and a liquid crystal display module. The transmitting end main control module is respectively connected to the The transmitter power module, the sound wave transceiver module, the alarm prompt circuit module, the temperature clock module, and the wireless transmitter module are connected. The sensor is used to measure the temperature in the oil tank, and the receiving end is also connected to an external computer in a wireless or wired manner. 2. The device for measuring the liquid level of a large liquid storage tank based on wireless transmission according to claim 1, wherein the ultrasonic transceiver module is a KS103 ultrasonic transceiver module. 3. The device for measuring the liquid level of a large liquid storage tank based on wireless transmission according to claim 2, characterized in that: the main control module of the transmitting end and the main control module of the receiving end adopt C51 series single-chip microcomputers. 4. The device for measuring the liquid level of a large liquid storage tank based on wireless transmission according to claim 3, characterized in that: the transmitter power module and the receiver power module are completed by a 220VAC to 5VDC power adapter, and AMS1117 is used to stabilize the voltage The chip converts 5V to 3.3V. 5. The device for measuring the liquid level of a large liquid storage tank based on wireless transmission according to claim 4, wherein the alarm prompt circuit module adopts a buzzer. 6. The device for measuring the liquid level of a large liquid storage tank based on wireless transmission according to any one of claims 1-5, characterized in that: the temperature sensor adopts a DS18B20 temperature sensor, and the wireless transmitting module is composed of the wireless receiving module The module composition selects NRF24L01 single-chip radio frequency transceiver chip, and the liquid crystal display module uses a TFT liquid crystal touch screen to control and display data information.