CN214586569U - Liquid level control system - Google Patents

Abstract

A liquid level control system is provided with a singlechip module, a crystal oscillator circuit module, a reset module, a water level sensor module, a digital display module, an indicator light module, a relay module and a buzzer circuit module; the single chip microcomputer module is respectively connected with the crystal oscillator circuit module, the reset module, the water level sensor module, the digital display module, the indicator light module, the relay module and the buzzer circuit module, the crystal oscillator circuit module is connected with the reset module, and the water level sensor module is connected with the buzzer circuit module. The liquid level control system can simply and clearly control the liquid level, reduce the use cost, simultaneously ensure that the system can efficiently and stably run for a long time, and has the characteristics of simple structure and convenient use.

Description

Liquid level control system

Technical Field

The utility model relates to a water level control circuit control technical field especially relates to a liquid level control system.

Background

Water is a source of life, and is an indispensable resource in life of people in industrial and agricultural production and other fields, so that the efficient and economical utilization of water resources becomes a topic of increasing attention of people. The automatic water level control is widely applied to industrial and agricultural production and daily life. The water level regulation of the large reservoir and the water storage amount control of the small reservoir in containers such as a refrigerator, a water pool, a water tank, a boiler and the like all need to use an automatic water level control system. Today, the rapid development of scientific technology still adopts a mode of manually controlling the water level in many places, which not only consumes a large amount of manpower, material resources and time, but also has low reliability.

Meanwhile, the existing water level adjusting system has the factors of overhigh use cost and complex operation program, and can only be singly used in a specific use scene and cannot be popularized, so that the water level adjusting system is also the reason for adopting a manual water level control mode in many places.

Therefore, it is necessary to provide a liquid level control system to overcome the deficiencies of the prior art.

Disclosure of Invention

An object of the utility model is to avoid prior art's weak point and provide a liquid level control system, this liquid level control system can be simply clear control liquid level, reduces use cost, and assurance system can stabilize permanent operation by the high efficiency simultaneously, has simple structure, convenient to use's characteristics.

The above object of the present invention is achieved by the following technical means.

The liquid level control system is provided with a single chip microcomputer module, a crystal oscillator circuit module, a reset module, a water level sensor module, a digital display module, an indicator light module, a relay module and a buzzer circuit module; the single chip microcomputer module is respectively connected with the crystal oscillator circuit module, the reset module, the water level sensor module, the digital display module, the indicator light module, the relay module and the buzzer circuit module, the crystal oscillator circuit module is connected with the reset module, and the water level sensor module is connected with the buzzer circuit module.

Preferably, the single chip microcomputer module is provided with a chip U1, a switch S1, a switch S3, a slide rheostat P3, a power switch SW1 and a capacitor C4;

the crystal oscillator circuit module is provided with a crystal oscillator Y1, a capacitor C2 and a capacitor C3;

the water level sensor module is provided with a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a triode Q3, a triode Q4, a triode Q5, a triode Q6 and a chip U3;

the digital display module is provided with a resistor R1 and a display U2;

the indicator lamp module is provided with a resistor R5, a resistor R6, a resistor R11, a light emitting diode D2, a light emitting diode D3 and a light emitting diode D4;

the reset module is provided with a switch S2, a resistor R4 and a capacitor C1;

preferably, the relay module is provided with an interface P2, a light emitting diode D1, a resistor R2, a resistor R3, a relay K1 and a triode Q1;

preferably, the buzzer circuit module is provided with a triode Q2 and a buzzer B1;

preferably, the pin 1 of the chip U1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to the pin 2 of the power switch SW1, one end of the capacitor C4, the pin 31 of the chip U1, the pin 40 of the chip U1, the pin 1 of the chip U3, one end of the resistor R3, the emitter of the transistor Q3, and one end of the resistor R3, preferably, one end of the resistor R3, the anode of the light emitting diode D3, one end of the switch S3, and the anode of the capacitor C3, the pin 2 of the chip U3 is connected to one end of the switch S3, the pin 3 of the chip U3 is connected to one end of the switch S3, the other end of the switch S3 is connected to the ground, and one end of the pin of the resistor R3 is connected to the ground, The other end of the switch S2 is connected, the pin 14 of the chip U1 is connected to the other end of the resistor R7 and the emitter of the transistor Q3, the pin 15 of the chip U1 is connected to the other end of the resistor R8 and the emitter of the transistor Q4, the pin 16 of the chip U4 is connected to the other end of the resistor R4 and the emitter of the transistor Q4, the pin 17 of the chip U4 is connected to the other end of the resistor R4 and the emitter of the transistor Q4, the pin 21 of the chip U4 is connected to one end of the resistor R4, the pin 22 of the chip U4 is connected to one end of the resistor R4, the pin 23 of the chip U4 is connected to one end of the resistor R4, the pin 32 of the chip U4 is connected to the pin 8 of the chip U4, the other end of the resistor R4 and the pin 3 of the chip U4, the pin 33 of the chip U4 is connected to the pin 6 of the chip U4, the pin 28 of the chip U4 and the pin 365 of the chip U4 are connected to the pin 365 of the chip U4, and the pin 4 are connected to the pin 365 of the chip U4. A pin 36 of the chip U1 is connected to a pin 3 of the chip U2, a pin 37 of the chip U1 is connected to a pin 2 of the chip U2, a pin 38 of the chip U1 is connected to a pin 9 of the chip U2, a pin 39 of the chip U1 is connected to a pin 10 of the chip U2, the other end of the resistor R4 is connected to one end of the capacitor C2, and a pin 20 of the chip U2, a pin 18 of the chip U2 is connected to the other end of the capacitor C2 and one end of the crystal Y2, a pin 19 of the chip U2 is connected to the other end of the capacitor C2 and the other end of the crystal Y2, a base electrode of the transistor Q2 is connected to a pin 4 of the relay K2, a positive electrode of the diode D2, and a pin 1 of the interface P2, a pin 5 of the relay K2 is connected to one end of the resistor R2, a pin 2 of the interface P2, a negative electrode of the diode D2 is connected to the ground, and a buzzer 2B of the transistor B. The other end of the resistor R5 is connected with the cathode of the LED D2, the other end of the resistor R6 is connected with the cathode of the LED D3, the other end of the resistor R11 is connected with the cathode of the LED D4, the base electrode of the transistor Q3 is respectively connected with the base electrode of the transistor Q4, the base electrode of the transistor Q5, the base electrode of the transistor Q6, one end of the resistor R12, one end of the resistor R13, one end of the resistor R14 and one end of the resistor R14, the base electrode of the transistor Q14 is grounded, the base electrode of the transistor Q14 is respectively connected with the other end of the resistor R14 and the 2-pin of the chip U14, the base electrode of the transistor Q14 is respectively connected with the other end of the resistor R14 and the 3-pin of the chip U14, the base electrode of the transistor Q14 is respectively connected with the other end of the resistor R14 and the 4-pin of the chip U14, the base electrode of the transistor Q14 is respectively connected with the other end of the resistor R14 and the pin of the chip U14, and the negative electrode of the varistor P3-pin of the capacitor C14, The pin 2 of the sliding rheostat P3 is connected, the pin 1 of the sliding rheostat P3 is connected with the pin 1 of the switch SW1, and the negative electrode of the capacitor C4 is grounded.

Preferably, the light emitting diode D2 is a yellow light emitting diode.

Preferably, the light emitting diode D3 is a green light emitting diode.

Preferably, the light emitting diode D4 is a red light emitting diode.

Preferably, the chip U1 is an STC89C52 single chip microcomputer.

Preferably, the display U2 is arranged as a 1-bit 8-segment c-yang nixie tube.

Preferably, the chip U3 is provided as a water level sensor, and the water level sensor is provided as DLK 201.

Preferably, the relay K1 is HRS4H-S-DC 5V.

The utility model discloses a liquid level control system is provided with a singlechip module, a crystal oscillator circuit module, a reset module, a water level sensor module, a digital display module, an indicator light module, a relay module and a buzzer circuit module; the single chip microcomputer module is respectively connected with the crystal oscillator circuit module, the reset module, the water level sensor module, the digital display module, the indicator light module, the relay module and the buzzer circuit module, the crystal oscillator circuit module is connected with the reset module, and the water level sensor module is connected with the buzzer circuit module. When the water level measuring device is used, the single chip microcomputer module controls the water level measuring sensor module to measure the water level height and send the water level height information to the single chip microcomputer module, and the single chip microcomputer module carries out data processing on the received water level height signal and converts the measured water level change into a corresponding electric signal. The single chip microcomputer module respectively sends the electric signals to the digital display module, the indicator light module, the relay module and the buzzer circuit module; the digital display module displays the water level height, the indicator light module is used for indicating the water level state and controlling the work of the water pump through the relay, the buzzer circuit module carries out the alarm early warning of the water level, and the crystal oscillator circuit module is used for improving the running speed of the single chip microcomputer and the reset module is used for protecting the restarting system. The liquid level control system can simply and clearly control the liquid level, reduce the use cost, simultaneously ensure that the system can efficiently and stably run for a long time, and has the characteristics of simple structure and convenient use.

Drawings

The present invention will be further described with reference to the accompanying drawings, but the contents in the drawings do not constitute any limitation to the present invention.

Fig. 1 is a schematic structural diagram of a liquid level control system according to the present invention.

Fig. 2 is a circuit diagram of the single chip module of the liquid level control system of the present invention.

Fig. 3 is a circuit diagram of a crystal oscillator circuit module of the liquid level control system of the present invention.

Fig. 4 is a circuit diagram of a reset module of the liquid level control system of the present invention.

Fig. 5 is a circuit diagram of a water level sensor module and a buzzer circuit module of the liquid level control system of the present invention.

Fig. 6 is a circuit diagram of a digital display module of a liquid level control system according to the present invention.

Fig. 7 is a circuit diagram of an indicator light module of a liquid level control system according to the present invention.

Fig. 8 is a circuit diagram of a relay module of a fluid level control system according to the present invention.

In fig. 1 to 8, there are included:

the system comprises a singlechip module 100, a crystal oscillator circuit module 200, a reset module 300, a water level sensor module 400, a digital display module 500, an indicator lamp module 600, a relay module 700 and a buzzer circuit module 800.

Detailed Description

The invention will be further described with reference to the following examples.

Example 1.

A liquid level control system is provided with a singlechip module 100, a crystal oscillator circuit module 200, a reset module 300, a water level sensor module 400, a digital display module 500, an indicator light module 600, a relay module 700 and a buzzer circuit module 800 as shown in figure 1; the single chip microcomputer module 100 is respectively connected with the crystal oscillator circuit module 200, the reset module 300, the water level sensor module 400, the digital display module 500, the indicator lamp module 600, the relay module 700 and the buzzer circuit module 800, the crystal oscillator circuit module 200 is connected with the reset module 300, and the water level sensor module 400 is connected with the buzzer circuit module 800.

As shown in fig. 2, the single chip microcomputer 100 is provided with a chip U1, a switch S1, a switch S3, a slide varistor P3, a power switch SW1 and a capacitor C4. Specifically, the chip U1 is set as an STC89C52 single chip microcomputer. One side of the power switch SW1 is responsible for accessing a 220V power supply, a 5-pin of the power switch SW1 is accessed to the positive pole, and a 4-pin of the power switch SW1 is accessed to the negative pole. The capacitor C4 is used for voltage stabilization, the slide rheostat P3 is used for voltage regulation, and meanwhile the power switch SW1 outputs + 5V power to the whole system.

The STC89C52RC singlechip is a CMOS 8-bit microcontroller with low power consumption and high performance, which is produced by a macro-crystal science and technology company, the inner part of the microcontroller is provided with 8K byte flash and 512 byte RAM, P4 ports (4 in total from P4.0 to P4.3) which can be used for bit addressing are added on the basis of 32-bit I/O port lines of the C52 singlechip, and the total number of the I/O port lines is 36. Main performance parameters of STC89C52RC single chip microcomputer

8 interruption sources.

② full duplex serial port.

③ 2 read-write interruption port lines and a three-line encryption program memory.

And fourthly, 8K bytes Flash memory capable of being erased and written repeatedly.

4 parallel I/O port lines with 8 bits, and 256 bytes by 8 bytes internal memory.

Low power consumption idle and power down modes.

Seventhly, 3 16-bit timing/counters.

And the oscillator and the clock circuit in the slice.

Function specification of main pin of STC89C52RC singlechip

(1) Power supply pin

Firstly, a power supply end: the power end is the 40 th pin of singlechip, as the power end, and the singlechip should insert +5 volt power when normally working.

Ground port: the ground port is the 20 th pin of the singlechip and is used as a ground port.

Clock circuit pins XTAL1 and XTAL2

XTAL 1: XTAL1 is the 19 th pin of the singlechip, as the pin of the external crystal oscillator of the chip.

XTAL 2: XTAL2 is the 18 th pin of the single chip, and is also used as the pin of the external crystal oscillator, or the output interface of the oscillator inverting amplifier of the chip, and the signal pulse of the oscillator will be transmitted to the pin.

(3) RST pin

RST is the 9 th pin of the single chip, which is used as a reset/standby power supply pin.

ALE pin

The ALE is a 30 th pin of the single chip microcomputer and is used as an address latch enabling output port, and when Flash programming is carried out, the address latch allowing signal port ALE is used as a programming input end. When the single chip microcomputer accesses the external memory ROM, in order to complete the isolation of data and low-order addresses, ALE will latch the low-order 8-order bits appearing at the port P0.

When the singlechip works without errors, the ALE outputs a signal at a fixed frequency cycle, outputs a positive pulse signal and outputs the signal at a fixed frequency which is one sixth of the oscillation frequency of the clock, and because of the characteristic, the ALE port can be used as an external clock and can also be used as an external timing pulse. It should be noted that each time an ALE pulse is skipped during a data access to the external data memory.

P0 mouth

The port P0 comprises pins 39 to 32 of the singlechip, from P0.0 to PO.7, is an open-drain bidirectional type, and each bit can drive 8 LS type TTL logic gate circuits. When reading the external memory data, the port P0 can provide the address of lower 8 bits and the multiplexing bus of 8 bits of data; the port P0 can also be considered a general purpose input/output port, which can be implemented when it does not read external memory or does not extend I/O. When a write 1 operation is performed on the P0 port, all pins of the port are floating, and the pins are used as high impedance inputs. When the port P0 is used as an output port, an external pull-up resistor is required because the output circuit is an open-drain circuit. When Flash programming is performed, the port P0 can also be used as a port for receiving instruction bytes.

P1 mouth

Port P1 includes pins 1 to 8 of the single chip from P1.0 to P1.7. The port P1 is used as a general I/O port and has three operation modes, i.e., an output mode, a read pin mode, and a read latch mode. The P1 port can drive 4 LSTTL loads. The current of 100uA is usually defined as the current of an LSTTL load, so the current absorbed or output by port P1 is no more than 100 uA. The port P1 has internal pull-up resistor, and no external pull-up resistor is needed.

(6) P2 mouth

Port P2 includes pins 21 to 28 of the single chip from P2.0 to P2.7. Port P2 is an 8-bit bidirectional general purpose I/O port with internal pull-up resistors. When the system accesses the external memory data, the data of the upper 8-bit addresses A15-A8 are sent out from the P2 port, and 4 TTL logic levels can be driven by each port line of the P2 port. The pull-up resistor of port P2 is the same as that of port P1, that is, when port P2 is used as input, its external signal will output a current when pulling down a pin due to the presence of the pull-up resistor inside.

P3 mouth

Port P3 includes pins 10 to 17 of the single chip from P3.0 to P3.7. The P3 port has many uses, and is also an 8-bit bidirectional I/O port with internal pull-up resistors. When the P3 port is used as the first function, its functional usage is similar to that of the P1 port. Due to the restriction of many conditions, the series of single-chip microcomputers only have 40 pins at most, but the number of the pins is far from meeting the signal number of the single-chip microcomputers in practical application. Therefore, two functions are added to a portion of the signal pins when designing the chip. The port P3 has a second function that is more important than the first function in practical applications, in addition to the port that is the first function.

As shown in fig. 3, the crystal oscillator circuit module 200 includes a crystal oscillator Y1, a capacitor C2, and a capacitor C3.

The process of the singlechip for executing the instruction can be divided into three steps of instruction fetching, instruction analyzing and instruction executing, each step consists of a plurality of micro-operations, and the micro-operations can be carried out according to a correct sequence under the control of a uniform clock. The clock of the single chip microcomputer can be generated in two modes, namely an internal clock mode and an external clock mode.

The internal clock mode is realized by using an oscillating circuit inside the single chip microcomputer chip, and at the moment, a timing element is required to be externally connected through XTAL1 and XTAL2 pins of the single chip microcomputer. The timing element generally uses a crystal oscillator and a capacitor to form a parallel resonant circuit, the capacitor C2 and the capacitor C3 are generally about 30PF, the main function is to help the oscillator start oscillation, and the oscillation frequency range of the crystal is 1.2 to 13 MHz. The higher the crystal oscillation frequency is, the higher the clock frequency of the system is, and the faster the running speed of the single chip microcomputer is. The clock oscillation frequency of the crystal oscillator Y1 adopted by the design is 12 MHz.

As shown in fig. 4, the reset module 300 is provided with a switch S2, a resistor R4, and a capacitor C1; the reset of the single chip microcomputer can be generated in two ways: firstly, a power-on reset mode and a key reset mode.

The power-on reset mode is realized by using a resistance-capacitance charging circuit, and the electric potential of the RST end is the same as VCC at the moment of powering on the single chip microcomputer. As the charging current decreases, the potential of the RST terminal gradually decreases. The occurrence of power-on reset can be ensured only by selecting proper capacitance and resistance and enabling the RC time constant to be larger than the reset time.

The key reset mode is realized by using a resistor voltage-dividing circuit, when the switch S2 is pressed down, the voltage division on the resistors R4 which are connected in series can enable the RST end to generate high level, and when the key is lifted up, the RST end generates low level. The occurrence of key reset can be ensured as long as the reset pulse width generated by the key is greater than the reset time. In practical applications, a composite reset method that integrates power-on reset and key reset is often used to ensure reliable occurrence of reset.

As shown in fig. 5, the water level sensor module 400 is provided with a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a transistor Q3, a transistor Q4, a transistor Q5, a transistor Q6, and a chip U3. When the water level sensor module 400 is used, the water level limit range information is set in an plus-minus mode through the switch S1 and the switch S3, when the water level of the container is lower than the set lowest value, the water level sensor module 400 outputs a signal to a voltage stabilizing circuit consisting of a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a transistor Q3, a transistor Q4, a transistor Q5 and a transistor Q6, and the signal is converted into a low level through the voltage stabilizing circuit. After the chip U1 in the single chip microcomputer module 100 receives the low level, the chip judges that the water level in the container is lower than the set value, then the buzzer is started to alarm, the water pump power supply is connected, and the water pump absorbs water to add water to the container. The main function of the voltage stabilizing circuit is to enable the signal transmitted from the sensor chip U3 to be stably input to the chip U1 in the single chip microcomputer module 100.

As shown in fig. 6, the digital display module 500 is provided with a resistor R1 and a display U2. Specifically, the display U2 is set as a 1-bit 8-segment c-yang nixie tube. The liquid level height display adopts a nixie tube display scheme, compared with a liquid crystal display scheme, the nixie tube display scheme is lower in cost, and liquid crystal cannot emit light, so that the use scene range of the liquid level height display is influenced. The liquid level control system requires 24 hours of operation, so the nixie tube is more suitable as a display tool.

The design adopts 1 bit 8 segments of common anode nixie tubes to display numerical values. The nixie tube is also called as a display decoder, is an electronic device capable of visually displaying numbers and other information, and has the advantages of low working voltage, small volume, long service life, high reliability and the like, short response time (generally not more than 0.1us), and high brightness. But it also has the disadvantage of larger working current, and the working current of each section is about 10 mA. Common anode means that the anodes of eight segments of the led are connected together.

As shown in fig. 7, the indicator lamp module 600 is provided with a resistor R5, a resistor R6, a resistor R11, a light emitting diode D2, a light emitting diode D3, and a light emitting diode D4. The led D2 is a yellow led, the led D3 is a green led, and the led D4 is a red led. The indicator light module 600 is implemented by using different color leds, wherein the liquid level control system has three water level status indicator lights, a red led indicates that the water level is lower than a predetermined water level, a green led indicates that the water level is normal, and a yellow led indicates that the water level reaches the predetermined water level.

As shown in fig. 8, the relay module 700 includes an interface P2, a light emitting diode D1, a resistor R2, a resistor R3, a relay K1, and a transistor Q1. The interface P2 is used to install a water pump, and the system controls the volume of the liquid level by controlling the water pumping and draining. When the water level is lower than the set lower limit value, the water pump starts to absorb water, when the water pump absorbs water, the water level rises, and when the water level reaches the set upper limit value, the singlechip controls the relay to cut off the power supply of the water pump to stop absorbing water. The relay is also called a relay, is essentially an electromagnet, and utilizes a coil to be electrified to generate a magnetic field to attract an armature to drive a contact to be closed or opened, thereby playing a role similar to a switch. The working essence of the relay is that one loop (generally low current) is used for controlling the on-off of the other loop (generally high current). Because the singlechip can not directly drive the motor, the relay is used in the design. Specifically, the relay K1 is set to HRS4H-S-DC 5V.

Specifically, the buzzer circuit module 800 is provided with a triode Q2 and a buzzer B1; this design adopts bee calling organ to realize alarming function, and alarm circuit is comparatively simple, and bee calling organ links to each other with the P2.7 pin of singlechip, is controlled by singlechip direct. The frequency of the buzzer can be programmed to meet the requirements of different customers.

Specifically, pin 1 of the chip U1 is connected to one end of a resistor R2, the other end of the resistor R2 is connected to a base of a transistor Q1, an emitter of a transistor Q1 is connected to pin 2 of a power switch SW1, one end of a capacitor C4, pin 31 of a chip U1, pin 40 of a chip U1, pin 1 of a chip U3, one end of a resistor R3, an emitter of a transistor Q3, and one end of a resistor R3, specifically, one end of the resistor R3, a positive electrode of a light emitting diode D3, a positive electrode of the light emitting diode D3, one end of a switch S3, and a positive electrode of a capacitor C3, pin 2 of the chip U3 is connected to one end of the switch S3, pin 3 of the chip U3 is connected to one end of the switch S3, the other end of the switch S3 is connected to the other end of the switch S3, and the other end of the resistor R3 is connected to the ground, and the pin of the chip R3 is connected to one end of the resistor R3, and the resistor R3, respectively, The other end of the switch S2 is connected, the pin 14 of the chip U1 is connected to the other end of the resistor R7 and the emitter of the transistor Q3, the pin 15 of the chip U1 is connected to the other end of the resistor R8 and the emitter of the transistor Q4, the pin 16 of the chip U4 is connected to the other end of the resistor R4 and the emitter of the transistor Q4, the pin 17 of the chip U4 is connected to the other end of the resistor R4 and the emitter of the transistor Q4, the pin 21 of the chip U4 is connected to one end of the resistor R4, the pin 22 of the chip U4 is connected to one end of the resistor R4, the pin 23 of the chip U4 is connected to one end of the resistor R4, the pin 32 of the chip U4 is connected to the pin 8 of the chip U4, the other end of the resistor R4 and the pin 3 of the chip U4, the pin 33 of the chip U4 is connected to the pin 6 of the chip U4, the pin 28 of the chip U4 and the pin 365 of the chip U4 are connected to the pin 365 of the chip U4, and the pin 4 are connected to the pin 365 of the chip U4. A pin 36 of the chip U1 is connected to a pin 3 of the chip U2, a pin 37 of the chip U1 is connected to a pin 2 of the chip U2, a pin 38 of the chip U1 is connected to a pin 9 of the chip U2, a pin 39 of the chip U1 is connected to a pin 10 of the chip U2, the other end of the resistor R4 is connected to one end of the capacitor C2, and a pin 20 of the chip U2, a pin 18 of the chip U2 is connected to the other end of the capacitor C2 and one end of the crystal Y2, a pin 19 of the chip U2 is connected to the other end of the capacitor C2 and the other end of the crystal Y2, a base electrode of the transistor Q2 is connected to a pin 4 of the relay K2, a positive electrode of the diode D2, and a pin 1 of the interface P2, a pin 5 of the relay K2 is connected to one end of the resistor R2, a pin 2 of the interface P2, a negative electrode of the diode D2 is connected to the ground, and a buzzer 2B of the transistor B. The other end of the resistor R5 is connected with the cathode of the LED D2, the other end of the resistor R6 is connected with the cathode of the LED D3, the other end of the resistor R11 is connected with the cathode of the LED D4, the base electrode of the transistor Q3 is respectively connected with the base electrode of the transistor Q4, the base electrode of the transistor Q5, the base electrode of the transistor Q6, one end of the resistor R12, one end of the resistor R13, one end of the resistor R14 and one end of the resistor R14, the base electrode of the transistor Q14 is grounded, the base electrode of the transistor Q14 is respectively connected with the other end of the resistor R14 and the 2-pin of the chip U14, the base electrode of the transistor Q14 is respectively connected with the other end of the resistor R14 and the 3-pin of the chip U14, the base electrode of the transistor Q14 is respectively connected with the other end of the resistor R14 and the 4-pin of the chip U14, the base electrode of the transistor Q14 is respectively connected with the other end of the resistor R14 and the pin of the chip U14, and the negative electrode of the varistor P3-pin of the capacitor C14, The pin 2 of the sliding rheostat P3 is connected, the pin 1 of the sliding rheostat P3 is connected with the pin 1 of the switch SW1, and the negative electrode of the capacitor C4 is grounded.

Specifically, the chip U3 is set as a water level sensor, and the water level sensor is set as DLK 201.

The liquid level control system of the utility model is provided with a singlechip module 100, a crystal oscillator circuit module 200, a reset module 300, a water level sensor module 400, a digital display module 500, an indicator light module 600, a relay module 700 and a buzzer circuit module 800; the single chip microcomputer module 100 is respectively connected with the crystal oscillator circuit module 200, the reset module 300, the water level sensor module 400, the digital display module 500, the indicator lamp module 600, the relay module 700 and the buzzer circuit module 800, the crystal oscillator circuit module 200 is connected with the reset module 300, and the water level sensor module 400 is connected with the buzzer circuit module 800. When the water level measuring device is used, the single chip microcomputer module 100 controls the water level measuring sensor module to measure the water level height and send the water level height information to the single chip microcomputer module 100, and the single chip microcomputer module 100 performs data processing on a received water level height signal and converts the measured water level change into a corresponding electric signal. The single chip microcomputer module 100 respectively sends the electric signals to the digital display module 500, the indicator light module 600, the relay module 700 and the buzzer circuit module 800; the digital display module 500 displays the water level height, the indicator light module 600 is used for indicating the water level state and controlling the work of the water pump through the relay, the buzzer circuit module 800 performs the alarm and early warning of the water level, the crystal oscillator circuit module 200 is used for improving the running speed of the single chip microcomputer, and the reset module 300 is used for protecting and restarting the system. This liquid level control system can be simple clear control liquid level, convenient operation reduces use cost, guarantees simultaneously that the system can high-efficient stable permanent operation, has simple structure, convenient to use's characteristics.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims (9)

1. A liquid level control system characterized by: the intelligent water level controller is provided with a singlechip module, a crystal oscillator circuit module, a reset module, a water level sensor module, a digital display module, an indicator light module, a relay module and a buzzer circuit module; the single chip microcomputer module is respectively connected with the crystal oscillator circuit module, the reset module, the water level sensor module, the digital display module, the indicator light module, the relay module and the buzzer circuit module, the crystal oscillator circuit module is connected with the reset module, and the water level sensor module is connected with the buzzer circuit module.

2. The fluid level control system of claim 1, wherein: the single chip microcomputer module is provided with a chip U1, a switch S1, a switch S3, a slide rheostat P3, a power switch SW1 and a capacitor C4; the reset module is provided with a switch S2, a resistor R4 and a capacitor C1;

the crystal oscillator circuit module is provided with a crystal oscillator Y1, a capacitor C2 and a capacitor C3;

the water level sensor module is provided with a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a triode Q3, a triode Q4, a triode Q5, a triode Q6 and a chip U3;

the digital display module is provided with a resistor R1 and a display U2;

the indicator lamp module is provided with a resistor R5, a resistor R6, a resistor R11, a light emitting diode D2, a light emitting diode D3 and a light emitting diode D4;

the relay module is provided with an interface P2, a light emitting diode D1, a resistor R2, a resistor R3, a relay K1 and a triode Q1;

the buzzer circuit module is provided with a triode Q2 and a buzzer B1;

a pin 1 of the chip U1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to a base of the transistor Q1, an emitter of the transistor Q1 is connected to a pin 2 of the power switch SW1, one end of the capacitor C4, a pin 31 of the chip U1, a pin 40 of the chip U1, a pin 1 of the chip U3, one end of the resistor R1, an emitter of the transistor Q2, one end of the resistor R7, one end of the resistor R8, one end of the resistor R9, one end of the resistor R10, an anode of the led D2, an anode of the led D3, an anode of the led D4, one end of the switch S2, and an anode of the capacitor C1, a pin 2 of the chip U1 is connected to one end of the switch S1, a pin 3 of the chip U1 is connected to one end of the switch S3, and the other end of the switch S1 is connected to the switch S3, the other end of the switch S1 is grounded, the pin 9 of the chip U1 is respectively connected with one end of the resistor R4 and the other end of the switch S2, the pin 14 of the chip U1 is respectively connected with the other end of the resistor R7 and the emitter of the triode Q3, the pin 15 of the chip U1 is respectively connected with the other end of the resistor R8 and the emitter of the triode Q4, the pin 16 of the chip U1 is respectively connected with the other end of the resistor R9 and the emitter of the triode Q5, the pin 17 of the chip U1 is respectively connected with the other end of the resistor R10 and the emitter of the triode Q6, the pin 21 of the chip U1 is connected with one end of the resistor R11, the pin 22 of the chip U1 is connected with one end of the resistor R6, the pin 23 of the chip U1 is connected with one end of the resistor R15, the pin 32 of the chip U1 is respectively connected with the pin 8 of the chip U2, the other end of the resistor R1 and the pin 3 of the chip 2, a pin 33 of the chip U1 is connected to a pin 6 of a chip U2, a pin 28 of the chip U1 is connected to a base of a transistor Q3, a pin 34 of the chip U1 is connected to a pin 5 of the chip U2, a pin 35 of the chip U1 is connected to a pin 4 of the chip U2, a pin 36 of the chip U1 is connected to a pin 3 of the chip U2, a pin 37 of the chip U1 is connected to a pin 2 of the chip U2, a pin 38 of the chip U1 is connected to a pin 9 of the chip U2, a pin 39 of the chip U1 is connected to a pin 10 of the chip U2, the other end of the resistor R2 is connected to one end of the capacitor C2, one end of the capacitor C2 and a pin 20 of the chip U2, a pin 18 of the chip U2 is connected to the other end of the capacitor C2, one end of the crystal Y2, and a pin 19 of the chip U2 is connected to the other end of the transistor Q2, and the transistor Q2 are connected to the base 364 of the transistor Q2, The positive electrode of a diode D1 and the 1 pin of an interface P1 are connected, the 5 pin of a relay K1 is respectively connected with one end of a resistor R3 and the 2 pin of an interface P1, the other end of the resistor R3 is connected with the negative electrode of a diode D1, the base electrode of a triode Q2 is connected with the positive electrode of a buzzer B1, the negative electrode of a buzzer B1 is grounded, the other end of the resistor R5 is connected with the negative electrode of a light-emitting diode D2, the other end of the resistor R6 is connected with the negative electrode of a light-emitting diode D3, the other end of the resistor R11 is connected with the negative electrode of a light-emitting diode D4, the base electrode of a triode Q3 is respectively connected with the base electrode of a triode Q4, the base electrode of a triode Q5, the base electrode of a triode Q6, one end of a resistor R12, one end of a resistor R13, one end of a resistor R14 and one end of a resistor R15, the base electrode of a triode Q3 is grounded, the other end of the base electrode of the triode Q3 is respectively connected with a resistor R12, The 2 pins of the chip U3 are connected, the base of the triode Q4 is respectively connected with the other end of the resistor R13 and the 3 pins of the chip U3, the base of the triode Q5 is respectively connected with the other end of the resistor R14 and the 4 pins of the chip U3, the base of the triode Q6 is respectively connected with the other end of the resistor R15 and the 5 pins of the chip U3, the negative electrode of the capacitor C4 is respectively connected with the 3 pins of the slide rheostat P3 and the 2 pins of the slide rheostat P3, the 1 pin of the slide rheostat P3 is connected with the 1 pin of the switch SW1, and the negative electrode of the capacitor C4 is grounded.

3. The fluid level control system of claim 2, wherein: the light emitting diode D2 is provided as a yellow light emitting diode.

4. The fluid level control system of claim 3, wherein: the light emitting diode D3 is provided as a green light emitting diode.

5. The fluid level control system of claim 4, wherein: the light emitting diode D4 is provided as a red light emitting diode.

6. The fluid level control system of claim 5, wherein: the chip U1 is set as an STC89C52 singlechip.

7. The fluid level control system of claim 6, wherein: the display U2 is set as a 1-bit 8-segment common-sun nixie tube.

8. The fluid level control system of claim 7, wherein: the chip U3 is set as a water level sensor which is set as DLK 201.

9. The fluid level control system of claim 8, wherein: the relay K1 is set to HRS4H-S-DC 5V.

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