CN201945066U

CN201945066U - Water level continuous display system of solar water heater

Info

Publication number: CN201945066U
Application number: CN2010206584761U
Authority: CN
Inventors: 王卫兵; 陈国兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-14
Filing date: 2010-12-14
Publication date: 2011-08-24
Anticipated expiration: 2020-12-14

Abstract

The utility model discloses a water level continuous display system of solar water heater, comprising a liquid crystal display module, an analogue-to-digital (A/D) conversion module, a single chip and a sensor module, wherein the single chip is connected to the liquid crystal display module by a P1 port, and connected to the A/D conversion module by a P2 port; the sensor module is connected to the A/D conversion module by a signal output pin CHO. The system of the utility model has the advantages of reasonable structure, good system stability and high display precision; simultaneously the water level real-time monitoring is realized.

Description

The continuous display system of a kind of solar water heater water level

Technical field

The utility model relates to the liquid level display system, is specifically related to the continuous display system of a kind of solar water heater water level.

Background technology

At present in people's daily life, and in the industrial and agricultural production field, usually can need the liquid level in the container (water level) is shown automatically.Such as the reservoir storage that shows automatically in the containers such as water tank, pond, solar energy, but adopt water level display system ubiquity following point in the market:

1) adopt direct current aqueous medium electric contact type level sensor, because of electrolytic effect, electrode very easily corrodes and causes loose contact, and reliability is low, and electrode life is short, causes the increase of user's O﹠M cost;

2) the water level classification of most of producer only has 3～4 grades, and resolution ratio is 80～100mm only also, and display precision is low, and people can not accurately judge actual water level in daily use.

In sum, not only reliability is low for existing liquid level display system on the market, and service life is short, and the water level display precision is low, and this has not only increased user's O﹠M cost, and display precision is low.

Summary of the invention

The technical problems to be solved in the utility model provides the continuous display system of a kind of solar water heater water level, and this technical scheme has not only reduced user's O﹠M cost, and has improved display precision.

The utility model is achieved through the following technical solutions:

The continuous display system of a kind of solar water heater water level, comprise LCD MODULE, analog-to-digital conversion module, single-chip microcomputer, sensor assembly, described single-chip microcomputer is connected with LCD MODULE by the P1 mouth, single-chip microcomputer is connected with analog-to-digital conversion module by the P2 mouth, and sensor assembly is connected with analog-to-digital conversion module by signal output pin CHO.

The further Technological improvement plan of the utility model is:

Described single-chip microcomputer P1 mouth comprises P1.0 pin, P1.1 pin, P1.2 pin, and P1.0 pin, P1.1 pin, P1.2 pin are connected with SDA pin, SCLK pin, the MCLK pin of LCD MODULE respectively; Described single-chip minimum system P2 mouth, comprise P2.4 pin, P2.5 pin, P2.2 pin, P2.4 pin, P2.5 pin, P2.6 pin are connected with CS pin, CLK pin, the DO pin of analog-to-digital conversion module respectively, and wherein the P2.6 pin also is connected with the D1 pin of analog-to-digital conversion module simultaneously; Sensor die block signal output pin CHO, wire pin GND, power pins VCC respectively with the signal input pin CHO of analog-to-digital conversion module, wire pin GND, power pins VCC be connected.

The further Technological improvement plan of the utility model is:

Described LCD MODULE adopts the SLCM24064A chip; Analog-to-digital conversion module adopts the ADC0832 chip; Single-chip microcomputer adopts the AT89C52 chip; Sensor assembly adopts the CCKZ-F mangneto to stretch liquid level sensor.

The utility model compared with prior art has following obvious advantage:

The utility model adopts " mangneto is stretched liquid level sensor " as sensor, this display system does not contain strenuous exercise's parts, simple and practical, mangneto is stretched liquid level sensor and is not changed for the transmission characteristic of sound wave, the stability of a system is good, display precision is high, because magnetostrictive liquid level sensor is continuous real-time measurement, helps water level and monitor in real time simultaneously; This display system adopts the mode of contactless measurement, has eliminated the mechanical wear problem of existing liquid level display system.

Description of drawings

Fig. 1 is a system block diagram of the present utility model.

Fig. 2 is an electrical schematic diagram of the present utility model.

The specific embodiment

As shown in Figure 1 and Figure 2, the utility model comprises LCD MODULE, analog-to-digital conversion module, single-chip microcomputer, sensor assembly composition, sensor assembly adopts mangneto to stretch liquid level sensor, the core components and parts of this sensor assembly comprise the measurement sensing element of a ferromagnetic material, be commonly referred to as waveguide, a transportable permanent magnet, magnet and waveguide can produce a magnetic field longitudinally.Whenever current impulse is that " request signal " sent by sensor electronics head and when the waveguide, second magnetic field is just created by the radially aspect of waveguide.When these two magnetic fields in the moment that waveguide intersects, waveguide produces " magnetostriction " existing picture, a strain-pulse produces immediately.This pulse that is called as " inverse signal " returns sensor electronics head and is detected next by detector from producing point (being the position measurement point) operation with ultrasonic speed.Magnet positions measurement accurately is by a high-speed timer of sensor circuit the time cycle that request signal is issued to inverse signal arrival to be surveyed and calculates, and this process is errorless very fast and accurately.

And then utilize differential mode voltage relatively, produce the pwm signal that a pulse width is inversely proportional to water level, by obtaining an industrial standard voltage signal by the circuit adjustment behind the integration, this voltage signal is sent to the CH0 pin of analog-to-digital conversion module by sensor assembly CH0 pin, by analog-to-digital conversion module the analog voltage signal that receives is converted to data signal, send to the corresponding pin of single-chip microcomputer P2 mouth, it is single-chip microcomputer P2.4 pin, the P2.5 pin, the P2.2 pin, the P2.4 pin, the P2.5 pin, the P2.6 pin respectively with the CS pin of analog-to-digital conversion module, the CLK pin, the DO pin connects, and wherein the P2.6 pin also is connected with the D1 pin of analog-to-digital conversion module simultaneously; By calculating time that sends driving pulse and the time that receives echo, computing time is poor

T is again according to hyperacoustic spread speed , can calculate the distance L 0=that detects between head and the liquid level

*

T, and the total depth L1 of container is known, can draw L=L1-L0.

Finally, the measuring voltage amplitude is along with the change of water level position is linear change output, water level signal is exported to the pin of LCD MODULE correspondence by the corresponding pin of single-chip microcomputer P1 mouth, be that single-chip microcomputer P1.0 pin, P1.1 pin, P1.2 pin are connected with SDA pin, SCLK pin, the MCLK pin of LCD MODULE respectively, show continuously on Liquid Crystal Module that finally liquid level changes.

In the present embodiment, LCD MODULE adopts the SLCM24064A chip, and analog-to-digital conversion module adopts the ADC0832 chip, and single-chip microcomputer adopts the AT89C52 chip, and sensor assembly adopts the CCKZ-F mangneto to stretch the liquid level sensor chip.

Claims

1. continuous display system of solar water heater water level, comprise LCD MODULE, analog-to-digital conversion module, single-chip microcomputer, sensor assembly, it is characterized in that: described single-chip microcomputer is connected with LCD MODULE by the P1 mouth, single-chip microcomputer is connected with analog-to-digital conversion module by the P2 mouth, and sensor assembly is connected with analog-to-digital conversion module by signal output pin CHO.

2. the continuous display system of a kind of solar water heater water level according to claim 1, it is characterized in that: described single-chip microcomputer P1 mouth, comprise P1.0 pin, P1.1 pin, P1.2 pin, P1.0 pin, P1.1 pin, P1.2 pin are connected with SDA pin, SCLK pin, the MCLK pin of LCD MODULE respectively; Described single-chip microcomputer P2 mouth, comprise P2.4 pin, P2.5 pin, P2.2 pin, P2.4 pin, P2.5 pin, P2.6 pin are connected with CS pin, CLK pin, the DO pin of analog-to-digital conversion module respectively, and wherein the P2.6 pin also is connected with the D1 pin of analog-to-digital conversion module simultaneously; Sensor die block signal output pin CHO, wire pin GND, power pins VCC respectively with the signal input pin CHO of analog-to-digital conversion module, wire pin GND, power pins VCC be connected.

3. the continuous display system of a kind of solar water heater water level according to claim 1 and 2 is characterized in that: described LCD MODULE adopts the SLCM24064A chip; Analog-to-digital conversion module adopts the ADC0832 chip; Single-chip microcomputer adopts the AT89C52 chip; Sensor assembly adopts the CCKZ-F mangneto to stretch liquid level sensor.