CN204439171U - The liquid level reminding device of monitoring transformer oil liquid level - Google Patents

Abstract

The utility model liquid level reminding device specifically relates to a device for monitoring the liquid level of transformer oil; the technical problem to be solved is: to provide a device capable of remotely monitoring the liquid level of transformer oil at all times; the technical solution adopted is: liquid level reminding device , including: a main controller module, an ultrasonic transmitting module, an ultrasonic receiving module, a display module, a wireless communication module, a clock module, a storage module, a reset control module and a power supply module; The module, the display module, the wireless communication module, the clock module, the storage module and the reset control module are connected, and the power supply module supplies power for the whole device; the utility model is applicable to the electric power department.

Description

Liquid level reminder device for monitoring transformer oil level

technical field

The utility model relates to a liquid level reminding device, in particular to a liquid level reminding device for monitoring the liquid level of transformer oil.

Background technique

At present, in the power system, the reliability of power supply is an important indicator for assessing power quality, reflecting the degree to which the power industry meets the power demand of the national economy. Now the reliability rate of urban power supply promised by the State Grid Corporation of China to the society has reached more than 99.9%. There are many factors that affect the reliability of power supply. Apart from irresistible bad weather, the largest proportion is equipment damage. Most of the current distribution transformers in my country are oil-filled transformers. Oil leakage and low oil level are one of the main reasons for the damage of such transformers. Due to the dense distribution of distribution transformers, it is impossible to implement all-weather manual monitoring of operating conditions , When the oil level is too low, it will affect the work of the transformer, resulting in unreliable power supply quality, especially for some large transformers, due to their large capacity and high voltage, manual monitoring is very inconvenient.

Contents of the invention

The utility model overcomes the deficiencies in the prior art, and the technical problem to be solved is to provide a device capable of remotely monitoring the transformer oil level at all times.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

The liquid level reminding device includes: a main controller module, an ultrasonic transmitting module, an ultrasonic receiving module, a display module, a wireless communication module, a clock module, a storage module, a reset control module and a power supply module.

The main controller module is respectively connected with the ultrasonic transmitting module, the ultrasonic receiving module, the display module, the wireless communication module, the clock module, the storage module and the reset control module, and the power supply module supplies power for the whole device.

The circuit structure of the ultrasonic transmitting module is as follows: the positive pole of the capacitor C1 is connected in parallel with the positive pole of the diode D1 and then connected with the signal input terminal a1, and the negative pole of the diode D1 is connected in parallel with the positive pole of the capacitor C2 and connected with the input of the three-terminal voltage regulator chip IC1 The output end of the three-terminal voltage stabilizing chip IC1 is connected in parallel with one end of the resistor R1, the positive pole of the capacitor C3 and one end of the resistor R3, and then connected to the positive power supply end of the NAND gate G1. The three-terminal voltage stabilizing chip IC1 The ground end of the resistor R1 is connected in parallel with the other end of the resistor R1 and then connected with one end of the resistor R2, and the other end of the resistor R3 is connected in parallel with one end of the resistor R4 and then connected with the A input of the NAND gate G1; the negative electrode of the capacitor C1 is connected in parallel Connect the signal input terminal a2, the negative pole of the capacitor C2, the other end of the resistor R2, the negative pole of the capacitor C3 and the other end of the resistor R4 to ground; the signal input terminal a1 and the signal input terminal a2 are connected to the signal output port of the main controller module connected.

The B input terminal of the NAND gate G1 is connected to one end of the resistor R5, and the output terminal of the NAND gate G1 is connected in parallel with the A input terminal of the NAND gate G2, the B input terminal of the NAND gate G2, and the A terminal of the NAND gate G3. The input terminal and the B input terminal of the NAND gate G3 are then connected to a fixed terminal of the adjustable resistor R6, and the output terminal of the NAND gate G2 is connected in parallel with the A input terminal of the NAND gate G4 and the B input of the NAND gate G4 connected to the positive pole of capacitor C4; the other end of the resistor R5 is connected in parallel with the movable end of the adjustable resistor R6 and the other fixed end of the adjustable resistor R6 is connected to the negative pole of the capacitor C4, and the NAND gate G4 The negative supply terminal is grounded.

The output end of the NAND gate G3 and the output end of the NAND gate G4 are connected to the input end of the ultrasonic transducer S1 respectively.

The circuit structure of the ultrasonic receiving module is as follows: one output end of the acoustic wave transducer S2 is connected in parallel with one end of the resistor R10 and then connected with one end of the capacitor C8, and the other output end of the ultrasonic transducer S2 is connected in parallel with the other end of the resistor R10 After grounding, the other end of the capacitor C8 is connected in series with the resistor R11 and then connected to pin 2 of the dual operational amplifier IC5.

The 2 pins of the dual operational amplifier IC5 are connected in series with the resistor R12 and connected with the 1 pin of the dual operational amplifier IC5, and the 1 pin of the dual operational amplifier IC5 is connected with the 6 pins of the dual operational amplifier IC5 after the capacitor C9 and the resistor R13 are connected in series successively. The 6 pins of the dual operational amplifier IC5 are connected in series with the resistor R14 and connected with the 7 pins of the dual operational amplifier IC5, and the 3 pins of the dual operational amplifier IC5 are connected in parallel with one end of the capacitor C10, one end of the resistor R15 and one end of the resistor R16, and then connected with the dual operational amplifier Pin 5 of IC5 is connected, the other end of the capacitor C10 and the other end of the resistor R15 are both grounded, and the other end of the resistor R16 is connected to the positive pole VCC of the power supply.

The 7 pins of the double operational amplifier IC5 are connected with the positive input terminal of the voltage comparator IC6; the negative input terminal of the voltage comparator IC6 is grounded after the resistor R17 is connected in series, and the negative input terminal of the voltage comparator IC6 is connected with the power supply after the resistor R18 is connected in series The positive pole is connected to VCC, and the output terminal of the voltage comparator IC6 is connected to the signal input port of the main controller module.

When working, the above-mentioned NAND gate G1 and NAND gate G2 form a controllable oscillator. When the main controller module 1 sends a signal to the ultrasonic transmitting module 2, the oscillator starts to vibrate; adjusting the adjustable resistor R6 can change the oscillation frequency and the oscillation signal Respectively control the work of the differential phase driver composed of the NAND gate G3 and the NAND gate G4. When the NAND gate G3 outputs a high level, the NAND gate G4 must output a low level; when the NAND gate G3 outputs a low level, the NAND The gate G4 outputs a high level, which controls the ultrasonic signal sent by the ultrasonic transducer S1; the weak signal received by the ultrasonic transducer S2 is amplified by the AC coupling to the dual operational amplifier IC5, and the amplified signal is then amplified by the voltage The comparator IC6 is shaped, the output signal is received by the main controller module 1, and the main controller module 1 can judge the transformer oil level through the change of the signal in the ultrasonic transmitting module 2 and the ultrasonic receiving module 3 connected with the main controller module 1. change information.

Compared with the prior art, the utility model has the beneficial effects that: the utility model can accurately monitor the transformer oil level information at all times through the ultrasonic transmitting module and the ultrasonic receiving module, and can send the above information to the background monitoring center through the wireless communication module , to meet the monitoring of the transformer oil level, the sensing modules in the utility model all adopt low-voltage and low-power DC circuits, with low energy consumption, simple structure of the whole circuit, low cost and strong practicability.

Description of drawings

Fig. 1 is a schematic diagram of the circuit structure of the utility model.

Fig. 2 is a circuit diagram of the ultrasonic transmitting module in the utility model.

Fig. 3 is a circuit diagram of the ultrasonic receiving module in the utility model.

In the figure: 1-main controller module, 2-ultrasonic transmitting module, 3-ultrasonic receiving module, 4-display module, 5-wireless communication module, 6-clock module, 7-storage module, 8-reset control module, 9 - Power module.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

A liquid level reminder device for monitoring the liquid level of transformer oil, as shown in Figure 1, comprising: a main controller module 1, an ultrasonic transmitting module 2, an ultrasonic receiving module 3, a display module 4, a wireless communication module 5, a clock module 6, A storage module 7, a reset control module 8 and a power module 9.

The main controller module 1 is respectively connected with the ultrasonic transmitting module 2, the ultrasonic receiving module 3, the display module 4, the wireless communication module 5, the clock module 6, the storage module 7 and the reset control module 8, and the power module 9 is the whole device Power supply; the display screen provided in the display module 4 can visually display the transformer oil level information; the wireless communication module 5 is connected to the background server through a wireless network for communication, and the wireless communication module 5 can adopt a WIFI module or a Zigbee module , or a GPRS module.

As shown in Figure 2, the circuit structure of the ultrasonic transmitting module 2 is: the anode of the capacitor C1 is connected in parallel with the anode of the diode D1 and then connected with the signal input terminal a1, and the cathode of the diode D1 is connected in parallel with the anode of the capacitor C2 and then connected with the three The input terminal of the three-terminal voltage stabilizing chip IC1 is connected, and the output terminal of the three-terminal voltage stabilizing chip IC1 is connected in parallel with one end of the resistor R1, the positive pole of the capacitor C3 and one end of the resistor R3, and then connected with the positive power supply terminal of the NAND gate G1, so The ground terminal of the three-terminal voltage stabilizing chip IC1 is connected in parallel with the other end of the resistor R1 and then connected with one end of the resistor R2, and the other end of the resistor R3 is connected in parallel with one end of the resistor R4 and connected with the A input terminal of the NAND gate G1; The negative pole of the capacitor C1 is connected in parallel with the signal input terminal a2, the negative pole of the capacitor C2, the other end of the resistor R2, the negative pole of the capacitor C3 and the other end of the resistor R4, and then grounded; the signal input terminal a1 and the signal input terminal a2 are connected to the main The signal output ports of the controller module 1 are connected to each other.

The B input terminal of the NAND gate G1 is connected to one end of the resistor R5, and the output terminal of the NAND gate G1 is connected in parallel with the A input terminal of the NAND gate G2, the B input terminal of the NAND gate G2, and the A terminal of the NAND gate G3. The input terminal and the B input terminal of the NAND gate G3 are then connected to a fixed terminal of the adjustable resistor R6, and the output terminal of the NAND gate G2 is connected in parallel with the A input terminal of the NAND gate G4 and the B input of the NAND gate G4 connected to the positive pole of capacitor C4; the other end of the resistor R5 is connected in parallel with the movable end of the adjustable resistor R6 and the other fixed end of the adjustable resistor R6 is connected to the negative pole of the capacitor C4, and the NAND gate G4 The negative power supply terminal is grounded; the output terminal of the NAND gate G3 and the output terminal of the NAND gate G4 are respectively connected to the input terminal of the ultrasonic transducer S1.

As shown in Fig. 3, the circuit structure of described ultrasonic wave receiving module 3 is: an output end of acoustic wave transducer S2 is connected with an end of electric capacity C8 after being connected in parallel with one end of resistance R10, the other output end of ultrasonic wave transducer S2 The other end of the resistor R10 is connected in parallel and grounded, and the other end of the capacitor C8 is connected in series with the resistor R11 and connected to pin 2 of the dual operational amplifier IC5.

The 2 pins of the dual operational amplifier IC5 are connected in series with the resistor R12 and connected with the 1 pin of the dual operational amplifier IC5, and the 1 pin of the dual operational amplifier IC5 is connected with the 6 pins of the dual operational amplifier IC5 after the capacitor C9 and the resistor R13 are connected in series successively. The 6 pins of the dual operational amplifier IC5 are connected in series with the resistor R14 and connected with the 7 pins of the dual operational amplifier IC5, and the 3 pins of the dual operational amplifier IC5 are connected in parallel with one end of the capacitor C10, one end of the resistor R15 and one end of the resistor R16, and then connected with the dual operational amplifier Pin 5 of IC5 is connected, the other end of the capacitor C10 and the other end of the resistor R15 are both grounded, and the other end of the resistor R16 is connected to the positive pole VCC of the power supply.

The 7 pins of the double operational amplifier IC5 are connected with the positive input terminal of the voltage comparator IC6; the negative input terminal of the voltage comparator IC6 is grounded after the resistor R17 is connected in series, and the negative input terminal of the voltage comparator IC6 is connected with the power supply after the resistor R18 is connected in series The positive pole is connected to VCC, and the output terminal of the voltage comparator IC6 is connected to the signal input port of the main controller module 1 .

The ultrasonic transmitting module 2 and the ultrasonic receiving module 3 all have a plurality of paired settings; the NAND gate G1, the NAND gate G2, the NAND gate G3 and the NAND gate G4 adopt four groups of 2-input NAND gate chips, For example: 74LS00 chip; the three-terminal regulator chip IC1 adopts a 7812 chip or a 7809 chip; the dual operational amplifier IC5 adopts a dual operational amplifier model of TL082, and the voltage comparator IC6 adopts a voltage comparator chip of a model LM311 .

The above-mentioned NAND gate G1 and NAND gate G2 form a controllable oscillator. When the main controller module 1 sends a signal to the ultrasonic transmitting module 2, the oscillator starts to vibrate; adjusting the adjustable resistor R6 can change the oscillation frequency, and the oscillation signal is respectively controlled by The differential phase driver composed of the NAND gate G3 and the NAND gate G4 works. When the NAND gate G3 outputs a high level, the NAND gate G4 must output a low level; when the NAND gate G3 outputs a low level, the NAND gate G4 outputs High level, this level controls the ultrasonic signal sent by the ultrasonic transducer S1; the weak signal received by the above ultrasonic transducer S2 is amplified by the AC coupling to the dual operational amplifier IC5, and the amplified signal is then sent by the voltage comparator IC6 Shaping, the output signal is received by the main controller module 1, through the changes of the signals in the ultrasonic transmitting module 2 and ultrasonic receiving module 3 connected to the main controller module 1, the main controller module 1 can judge the change information of the transformer oil level.

The utility model can accurately monitor the transformer oil level information at all times through the ultrasonic transmitting module and the ultrasonic receiving module, and can send the above information to the background monitoring center through the wireless communication module to meet the monitoring of the transformer oil level. The sensing modules all adopt low-voltage and low-power DC circuits with low energy consumption. The entire circuit has a simple structure, low cost and strong practicability.

Claims (6)

1. monitor a liquid level reminding device for transformer oil liquid level, comprising: main controller module (1), ultrasound wave transmitter module (2), ultrasound wave receiver module (3), display module (4), wireless communication module (5), clock module (6), memory module (7), reset control module (8) and power module (9);

It is characterized in that: described main controller module (1) is connected with reset control module (8) with ultrasound wave transmitter module (2), ultrasound wave receiver module (3), display module (4), wireless communication module (5), clock module (6), memory module (7) respectively, described power module (9) is powered for whole device;

The circuit structure of described ultrasound wave transmitter module (2) is: the positive pole of electric capacity C1 is also connected with signal input part a1 after connecing the positive pole of diode D1, be connected with the input end of three-terminal voltage-stabilizing chip IC 1 after the positive pole of the negative pole shunt-wound capacitance C2 of described diode D1, the output terminal of described three-terminal voltage-stabilizing chip IC 1 one end of connecting resistance R1, the positive pole of electric capacity C3 is connected with the positive power source terminal of Sheffer stroke gate G1 with behind one end of resistance R3, the earth terminal of described three-terminal voltage-stabilizing chip IC 1 is also connected with one end of resistance R2 after the other end of connecting resistance R1, the other end of described resistance R3 is also connected with the A input end of Sheffer stroke gate G1 behind one end of connecting resistance R4, the negative pole of described electric capacity C1 ground connection after connecing the other end of signal input part a2, the negative pole of electric capacity C2, the other end of resistance R2, the negative pole of electric capacity C3 and resistance R4, described signal input part a1 is connected with the signal output port of main controller module (1) with signal input part a2,

The B input end of described Sheffer stroke gate G1 is connected with one end of resistance R5, the output terminal of Sheffer stroke gate G1 and connect the A input end of Sheffer stroke gate G2, the B input end of Sheffer stroke gate G2, the A input end of Sheffer stroke gate G3 be connected with a stiff end of adjustable resistance R6 with after the B input end of Sheffer stroke gate G3, the output terminal of described Sheffer stroke gate G2 is also connected with the positive pole of electric capacity C4 after connecing the A input end of Sheffer stroke gate G4 and the B input end of Sheffer stroke gate G4; The other end of described resistance R5 is also connected with the negative pole of electric capacity C4 after connecing the movable end of adjustable resistance R6 and another stiff end of adjustable resistance R6, the negative power end ground connection of described Sheffer stroke gate G4;

The output terminal of described Sheffer stroke gate G3 is connected with the input end of ultrasonic transducer S1 respectively with the output terminal of Sheffer stroke gate G4;

The circuit structure of described ultrasound wave receiver module (3) is: an output terminal of acoustic wave transducer S2 is also connected with one end of electric capacity C8 behind one end of connecting resistance R10, another output terminal of ultrasonic transducer S2 ground connection after the other end of connecting resistance R10, be connected with 2 pin of dual operational amplifier IC5 after the other end series resistor R11 of described electric capacity C8;

Be connected with 1 pin of dual operational amplifier IC5 after the 2 pin series resistor R12 of described dual operational amplifier IC5, 1 pin of dual operational amplifier IC5 successively serial capacitance C9 is connected with 6 pin of dual operational amplifier IC5 with after resistance R13, be connected with 7 pin of dual operational amplifier IC5 after the 6 pin series resistor R14 of dual operational amplifier IC5, one end of the 3 pin shunt-wound capacitance C10 of dual operational amplifier IC5, one end of resistance R15 is connected with 5 pin of dual operational amplifier IC5 with behind one end of resistance R16, the other end of described electric capacity C10 and the equal ground connection of the other end of resistance R15, the other end of described resistance R16 is connected with positive source VCC,

7 pin of described dual operational amplifier IC5 are connected with the positive input terminal of voltage comparator ic 6; Ground connection after the negative input end series resistor R17 of voltage comparator ic 6, is connected with positive source VCC after the negative input end series resistor R18 of voltage comparator ic 6, and the output terminal of voltage comparator ic 6 is connected with the signal input port of main controller module (1).

2. liquid level reminding device according to claim 1, is characterized in that: described ultrasound wave transmitter module (2) and ultrasound wave receiver module (3) all have multiple paired setting.

3. liquid level reminding device according to claim 2, is characterized in that: described Sheffer stroke gate G1, Sheffer stroke gate G2, Sheffer stroke gate G3 and Sheffer stroke gate G4 adopt four group of 2 input nand gate chip.

4. liquid level reminding device according to claim 3, is characterized in that: described three-terminal voltage-stabilizing chip IC 1 adopts 7812 chips or 7809 chips.

5. liquid level reminding device according to claim 4, is characterized in that: described dual operational amplifier IC5 adopts model to be the dual operational amplifier of TL082, and described voltage comparator ic 6 adopts model to be the voltage comparator chip of LM311.

6. liquid level reminding device according to claim 5, is characterized in that: described wireless communication module 5 to be connected with background server by wireless network and to carry out communication, and wireless communication module 5 adopts WIFI module or Zigbee module or GPRS module.