CN205228589U

CN205228589U - Wireless liquid level detection system based on guided wave pipe

Info

Publication number: CN205228589U
Application number: CN201521102994.4U
Authority: CN
Inventors: 丁英丽; 才勇智
Original assignee: Liaoning Institute of Science and Technology
Current assignee: Liaoning Institute of Science and Technology
Priority date: 2015-12-28
Filing date: 2015-12-28
Publication date: 2016-05-11
Anticipated expiration: 2025-12-28

Abstract

Wireless liquid level detection system based on guided wave pipe belongs to the measurement, test technical field especially relates to a wireless liquid level detection system based on guided wave pipe's improvement. The utility model provides a high wireless liquid level detection system based on guided wave pipe who just is fit for in the complex operating condition use of measurement accuracy. Wireless liquid level detection system based on guided wave pipe, its characterized in that: the guided wave is equipped with an ultrasonic transducer being intraductal, the next press packed bale draw together the STC89C52 singlechip, 14 pins of STC89C52 singlechip are connected to ultrasonic transducer's TR pin, the keyboard is connected at the 21 -24 of STC89C52 singlechip pin, and the LCD1602 display screen is connected to the 32 -38 pin of STC89C52 singlechip, and memory chip is connected to the 1 -2 pin of STC89C52 singlechip, the STC89C52 singlechip is connected with the RS485 interface.

Description

Based on the liquid level wireless detection system of waveguide pipe

Technical field

The utility model belongs to measurement; Technical field of measurement and test, especially relates to a kind of improvement of the liquid level wireless detection system based on waveguide pipe.

Background technology

The level sensing of current complex working condition is the difficult problem in winer construction field always.Occur that the reason of a this difficult problem mainly contains following two aspects: on the one hand, the environment of measure field, such as the change of smog, dust, steam, bubble and extraneous natural conditions is very large on the impact of measuring accuracy; On the other hand, the character of measuring media itself, such as pressure, viscosity and acid, alkalescence and change thereof also limit the normal use of many liquid level gauges.Like this, the level gauging instrument causing some routines is difficult to meet completely the level gauging requirement under numerous complicated operating mode, cause the phenomenon of a large amount of artificial liquid level calibrating in some occasions still ubiquity, add labour intensity, reduce the accuracy of measurement result.

Summary of the invention

The utility model is exactly for the problems referred to above, provide a kind of measuring accuracy high and be adapted at complex working condition use the liquid level wireless detection system based on waveguide pipe.

For realizing above-mentioned purpose of the present utility model, the utility model adopts following technical scheme, based on the liquid level wireless detection system of waveguide pipe, comprise waveguide pipe, ultrasonic probe is provided with in waveguide pipe, ultrasonic probe is connected with control system, described control system comprises host computer and slave computer, it is characterized in that: in waveguide pipe, be provided with a ultrasonic probe, described slave computer comprises STC89C52 single-chip microcomputer, the TR pin of ultrasonic probe connects 14 pins of STC89C52 single-chip microcomputer, and the EC pin of ultrasonic probe connects 15 pins of STC89C52 single-chip microcomputer; Keyboard is connected to the 21-24 pin of STC89C52 single-chip microcomputer, and the 32-38 pin of STC89C52 single-chip microcomputer connects LCD1602 display screen, and the 1-2 pin of STC89C52 single-chip microcomputer connects storage chip; STC89C52 single-chip microcomputer is connected with RS485 interface, 3 pins of STC89C52 single-chip microcomputer connect 2 pins and 3 pins of RS485 interface, 10 pins of STC89C52 single-chip microcomputer connect 1 pin of RS485 interface, 11 pins of STC89C52 single-chip microcomputer connect 4 pins of RS485 interface, and STC89C52 single-chip microcomputer is connected with host computer by RS485 interface.

As a kind of preferred version, described storage chip is 24C02 serial storage; The 1-4 pin ground connection of 24C02,5 pins of 24C02 storer connect 1 pin of STC89C52 single-chip microcomputer, 6 pins of 24C02 storer connect 2 pins of STC89C52 single-chip microcomputer, and 8 pins of 24C02 storer connect 9 pins of STC89C52 single-chip microcomputer by electric capacity C1.

Preferably, data transmission is carried out by radio receiving transmitting module between host computer and RS485 interface.

Preferably, twisted pair line connection is passed through between host computer and RS485 interface; Data transmission is carried out by twisted-pair feeder.

As another preferred version, described host computer is PC.

The beneficial effects of the utility model.

Probe is arranged in waveguide pipe by the utility model, and waveguide pipe significantly can reduce the interference of air-flow and other reflection wave, makes measuring accuracy higher.And usually use dual probe structure at the low cost ultrasonic probe of classics, the installation of this structure in guided wave level gauging mechanism as shown in Figure 1, although traditional dual probe is received and dispatched discrete, control relatively simple, but its beam axis is discrete, make at the wave beam of dual probe asymmetric in waveguide pipe, this unsymmetric structure is very large on measuring accuracy impact.The utility model adopts single sonde configuration, and as shown in Figure 2, structure-improved beam axis is coaxial with waveguide pipe, and symmetrical in geometrical axis, under the prerequisite ensureing measuring accuracy, significantly reduces waveguide pipe diameter, now mounting process also difficulty greatly decline.

Accompanying drawing explanation

Fig. 1 is installed on dual probe structural representation in waveguide pipe in prior art.

Fig. 2 is that the utility model is installed on single sonde configuration schematic diagram in waveguide pipe.

Fig. 3 is the utility model circuit diagram.

In figure, 1 is waveguide pipe, 2 is that dual probe, 3 is popped one's head in for single.

Embodiment

As shown in Figure 1, based on the liquid level wireless detection system of waveguide pipe, comprise waveguide pipe, ultrasonic probe is provided with in waveguide pipe, ultrasonic probe is connected with control system, described control system comprises host computer and slave computer, described host computer is PC, it is characterized in that: in waveguide pipe, be provided with a ultrasonic probe, described slave computer comprises STC89C52 single-chip microcomputer, the TR pin of ultrasonic probe connects 14 pins of STC89C52 single-chip microcomputer, and the EC pin of ultrasonic probe connects 15 pins of STC89C52 single-chip microcomputer; Keyboard is connected to the 21-24 pin of STC89C52 single-chip microcomputer, the 32-38 pin of STC89C52 single-chip microcomputer connects DB7, DB6, DB5, DB4, DB3, DB2, DB1 and DB0 pin of LCD1602 display screen, and also exclusion RES-8-10K is connected for the 32-38 pin of STC89C52 single-chip microcomputer; The 1-2 pin of STC89C52 single-chip microcomputer connects storage chip; Described storage chip is 24C02 serial storage; The 1-4 pin ground connection of 24C02,5 pins of 24C02 storer connect 1 pin of STC89C52 single-chip microcomputer, 6 pins of 24C02 storer connect 2 pins of STC89C52 single-chip microcomputer, and 8 pins of 24C02 storer connect 9 pins of STC89C52 single-chip microcomputer by electric capacity C1; STC89C52 single-chip microcomputer is connected with RS485 interface, 3 pins of STC89C52 single-chip microcomputer connect 2 pins and 3 pins of RS485 interface, 10 pins of STC89C52 single-chip microcomputer connect 1 pin of RS485 interface, and 11 pins of STC89C52 single-chip microcomputer connect 4 pins of RS485 interface; Host computer is by RS485 interface data.

Data transmission is carried out by radio receiving transmitting module between host computer and RS485 interface.

Twisted pair line connection is passed through between host computer and RS485 interface; Data transmission is carried out by twisted-pair feeder.

In Fig. 3, U1 is main control singlechip, and clock frequency is 11.0592MHz, U2 is serial ROM, and for storing setting data, U3 is RS485 interface, and U4 is liquid crystal display, and U5 is ultrasonic probe module.U1 initial reset after powering on, control U5 sends modulating pulse, and after echo receives, signal delivers to U1, and data, through calculating, are delivered to U4 display by U1.

Slave computer is provided with RS485 interface, and data, by these interface data (twisted-pair feeder or wireless module transparent transmission), are sent to MCGS by DDE, complete serial communication by host computer subsequently.

Claims

1. based on the liquid level wireless detection system of waveguide pipe, comprise waveguide pipe, ultrasonic probe is provided with in waveguide pipe, ultrasonic probe is connected with control system, described control system comprises host computer and slave computer, it is characterized in that: in waveguide pipe, be provided with a ultrasonic probe, described slave computer comprises STC89C52 single-chip microcomputer, the TR pin of ultrasonic probe connects 14 pins of STC89C52 single-chip microcomputer, and the EC pin of ultrasonic probe connects 15 pins of STC89C52 single-chip microcomputer; Keyboard is connected to the 21-24 pin of STC89C52 single-chip microcomputer, and the 32-38 pin of STC89C52 single-chip microcomputer connects LCD1602 display screen, and the 1-2 pin of STC89C52 single-chip microcomputer connects storage chip; STC89C52 single-chip microcomputer is connected with RS485 interface, 3 pins of STC89C52 single-chip microcomputer connect 2 pins and 3 pins of RS485 interface, 10 pins of STC89C52 single-chip microcomputer connect 1 pin of RS485 interface, 11 pins of STC89C52 single-chip microcomputer connect 4 pins of RS485 interface, and STC89C52 single-chip microcomputer is connected with host computer by RS485 interface.

2. the liquid level wireless detection system based on waveguide pipe according to claim 1, is characterized in that: described storage chip is 24C02 serial storage; The 1-4 pin ground connection of 24C02,5 pins of 24C02 storer connect 1 pin of STC89C52 single-chip microcomputer, 6 pins of 24C02 storer connect 2 pins of STC89C52 single-chip microcomputer, and 8 pins of 24C02 storer connect 9 pins of STC89C52 single-chip microcomputer by electric capacity C1.

3. the liquid level wireless detection system based on waveguide pipe according to claim 1, is characterized in that: carry out data transmission by radio receiving transmitting module between host computer and RS485 interface.

4. the liquid level wireless detection system based on waveguide pipe according to claim 1, is characterized in that: pass through twisted pair line connection between host computer and RS485 interface; Data transmission is carried out by twisted-pair feeder.

5. the liquid level wireless detection system based on waveguide pipe according to claim 1, is characterized in that: described host computer is PC.