CN105784071A - Oil level ultrasonoscope for transformer oil conservator - Google Patents
Oil level ultrasonoscope for transformer oil conservator Download PDFInfo
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- CN105784071A CN105784071A CN201610266107.XA CN201610266107A CN105784071A CN 105784071 A CN105784071 A CN 105784071A CN 201610266107 A CN201610266107 A CN 201610266107A CN 105784071 A CN105784071 A CN 105784071A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
Abstract
The invention provides an oil level ultrasonoscope for a transformer oil conservator. The oil level ultrasonoscope comprises an ultrasonic probe and a handheld terminal electrically connected with the ultrasonic probe, wherein a circuit device in the ultrasonic probe comprises an ultrasonic sensor, a driving module consisting of a PWM control circuit and a push-pull boosted circuit, and a signal processing module consisting of a voltage-reducing filter circuit and a front gain amplification circuit; a circuit device of the handheld terminal comprises a sampling module, a main control module, a temperature compensation module, an LCD display device, a matrix key module, a buzzer and a power module; the PWM control circuit is electrically connected with the main control module; the front gain amplification circuit is electrically connected with the main control module by virtue of the sampling module. The oil level ultrasonoscope is small in structure, convenient to carry, relatively low in cost, convenient to use, good in safety and relatively high in detection accuracy during use.
Description
Technical field
The present invention relates to transformator detection field of tool, be specifically related to a kind of installation for transformer oil level ultrasonic depth finder.
Background technology
Distribution transformer built-in electrical insulation oil is extremely important for distribution transformer.The oil level that distribution transformer is in operation need to be maintained within certain scope, and too high or too low all can the operation of transformator being caused of oil level has a strong impact on.The oil level of transformator is adjusted by the conservator of one of transformator facility, thus needs often oil pillow oil level to be checked or detect in transformator running.Traditional oil pillow oil level detection is generally adopted the facilities such as level vial instruction or metal float-ball type oil level gauge, and when checking oil level, observer stands in the front of the hagioscope of oil level indicator tool, the oil level of protection suitable distance manual observation instrument instruction；It is disadvantageous in that: oil level checks device, and maintenance difficult, accuracy of detection are not high when breaking down, manual observation error is relatively big, night or the bad indoor of light are difficult to observe and check, and manually stands in high-order oil pillow oil level of observing nearby the safety of observer is brought danger.
In recent years, level gauging instrument technical development is quickly, the application of electronic type liquid level emasuring device is increasingly extensive, in the detection of installation for transformer oil level, this type of detection device is also shown in research, if application publication number is CN105043506A, denomination of invention is the Chinese patent literature of " a kind of power transformer ultrasound wave oil pillow oil level detector ", namely a kind of power transformer ultrasound wave oil pillow oil level detector is provided, it is mainly by microprocessor, ultrasonic sensor, drive circuit, signal processing circuits etc. form, but, for this type of detector part most important part such as drive circuit and signal processing circuit, it does not provide specific embodiment.
Summary of the invention
It is an object of the invention to: a kind of compact structure is provided, is easy to carry, accuracy of detection is higher when property less costly, easy to use, safe is good and uses installation for transformer oil level ultrasonic depth finder.
The technical scheme is that the installation for transformer oil level ultrasonic depth finder of the present invention, it is structurally characterized in that: include ultrasound probe, handheld terminal and the connection cable electrically connected by ultrasound probe with handheld terminal；
Above-mentioned ultrasound probe has housing and the circuit arrangement being arranged in housing；The circuit arrangement being located in ultrasound probe housing includes ultrasonic sensor, drives module and signal processing module；Module is driven to include pwm control circuit and recommend booster circuit；Signal processing module includes blood pressure lowering filter circuit, preposition and gain amplifying circuit；Ultrasonic sensor, each circuit of driving module and each circuit of signal processing module are equipped with signal input part and signal output part；
LCD display, matrix press-key module, buzzer and the setting circuit arrangement in the enclosure that handheld terminal includes shell, is arranged on shell；The circuit arrangement being located in handheld terminal shell includes sampling module, main control module, temperature compensation module and power module；Sampling module is provided with signal input part and signal output part；Main control module is provided with pwm signal outfan, detectable signal input, temperature signal input, push button signalling input, display signal output part and alarm signal output ends；LCD display and buzzer are provided with signal input part respectively；Matrix press-key module and temperature compensation module are respectively equipped with signal output part；
The signal input part of ultrasonic sensor electrically connects with the signal output part recommending booster circuit driving module；The signal output part of the signal input part and pwm control circuit of recommending booster circuit electrically connects；The signal input part of pwm control circuit electrically connects with the pwm signal outfan of main control module；The signal input part of blood pressure lowering filter circuit of signal processing module electrically connects with the signal output part of ultrasonic sensor；Preposition and the signal input part of gain amplifying circuit electrically connects with the signal output part of blood pressure lowering filter circuit；Preposition and the signal output part of gain amplifying circuit electrically connects with the signal input part of the sampling module in handheld terminal；The signal output part of sampling module electrically connects with the detectable signal input of main control module；The signal input part of LCD display electrically connects with the display signal output part of main control module；The signal input part of buzzer electrically connects with the alarm signal output ends of main control module；The temperature signal input of main control module electrically connects with the signal output part of temperature compensation module；The push button signalling input of main control module electrically connects with the signal output part of matrix press-key module；Power module output+3.7V DC source is powered to ultrasound probe；Power module output+3.3V DC source and+5V DC source are powered to handheld terminal.
Further scheme is: the pwm control circuit of above-mentioned driving module includes integrated chip U2, resistance R8 and electric capacity C5；Integrated chip U2 is the integrated chip of model 74HC02；Integrated chip U2 has 1 to No. 14 pin；
One end of resistance R8 is the signal input part of above-mentioned pwm control circuit；The other end of resistance R8 and the 2 of integrated chip U2,5, No. 6 pin conllinear；No. 4 pins of integrated chip U2 and No. 9 pin electrical connections, No. 3 pins and No. 8 pin electrical connections；No. 7 pins of integrated chip U2 and one end of electric capacity C5 have common junction, and this common junction connects the+3.7V power output end of power module；The other end of electric capacity C5 and No. 14 pin ground connection of integrated chip U2；No. 1 pin of integrated chip U2 and No. 10 pins collectively form the signal output part of above-mentioned pwm control circuit.
Further scheme is: the booster circuit of recommending of above-mentioned driving module includes power step-up unit and recommends boosting unit；
The power step-up unit recommending booster circuit includes integrated chip U1, diode D1, diode D2, inductance L1, electric capacity C1, electrochemical capacitor C2, electrochemical capacitor C3, electrochemical capacitor C4, electric capacity C6, resistance R1, resistance R2 and resistance R3；Integrated chip U1 is the boost-voltage regulator of LM2577 model, and it has 1 to No. 5 pin；
The positive pole of electrochemical capacitor C2 just has common junction with diode D2's, and this common junction connects the+3.7V power output end of power module；No. 5 pin conllinear of the negative pole of diode D2, one end of inductance L1, one end of electric capacity C1 and integrated chip U1；The positive pole conllinear of No. 4 pins of integrated chip U1, the other end of inductance L1 and diode D1；The negative pole of diode D1, one end of resistance R1, the positive pole of electrochemical capacitor C3 and one end of electric capacity C6 form a common junction because of conllinear, this common junction output+18.5V DC source；No. 2 pin conllinear of the other end of resistance R1, one end of resistance R3 and integrated chip U1；No. 1 pin of integrated chip U1 is concatenated by the positive pole of resistance R2 and electrochemical capacitor C4；No. 3 equal ground connection of pin of the negative pole of electrochemical capacitor C2, electrochemical capacitor C3 negative pole, the negative pole of electrochemical capacitor C4, the other end of electric capacity C1, the other end of electric capacity C6, the other end of resistance R3 and integrated chip U1；
The boosting unit of recommending recommending booster circuit includes transformator T1, diode D3, diode D4, diode D5, diode D6, field effect transistor Q1, field effect transistor Q2, resistance R4, resistance R5, resistance R6 and resistance R7；The primary of transformator T1 has 3,4, No. 5 wiring pins, and secondary has No. 1 and No. 2 wiring pins；
One end of resistance R5 and one end of resistance R7 collectively form the above-mentioned signal input part recommending booster circuit；The grid conllinear of the other end of resistance R5, one end of resistance R4 and field effect transistor Q1；The grid conllinear of the other end of resistance R7, one end of resistance R6 and field effect transistor Q2；The source ground of the other end of resistance R4, the other end of resistance R6, the source electrode of field effect transistor Q1 and field effect transistor Q2；The drain electrode of field effect transistor Q1 electrically connects with No. 5 wiring pins of transformator T1；The drain electrode of field effect transistor Q2 electrically connects with No. 3 wiring pins of transformator T1；No. 4 wiring pins of transformator T1 connect the+18.5V DC source of power step-up unit output；The negative pole conllinear of No. 2 wiring pins of transformator T1 and the positive pole of diode D3 and diode D4；The negative pole conllinear of No. 1 wiring pin of transformator T1 and the positive pole of diode D5 and diode D6；The negative pole of diode D3 just has 1 common junction with diode D4's, and the negative pole of diode D5 just has 1 common junction with diode D6's, and these 2 common junction collectively form the above-mentioned signal output part recommending booster circuit.
Further scheme is: the blood pressure lowering filter circuit of above-mentioned signal processing module includes transformator T2, diode D7, diode D8, diode D9, diode D10, electric capacity C9, electric capacity C8, electric capacity C11, resistance R9, resistance R10 and resistance R14；The primary of transformator T2 has 3,4, No. 5 wiring pins, and secondary has No. 1 and No. 2 wiring pins；
One end of resistance R9 and one end of resistance R10 collectively form the signal input part of above-mentioned blood pressure lowering filter circuit；No. 3 wiring pin conllinear of the other end of resistance R9, the positive pole of diode D7, the negative pole of diode D8, one end of electric capacity C9 and transformator T2；No. 5 wiring pin conllinear of the other end of resistance R10, the positive pole of diode D9, the negative pole of diode D10, the other end of electric capacity C9 and transformator T2；The equal ground connection in one end of the negative pole of diode D7, the positive pole of diode D8, the negative pole of diode D9, the positive pole of diode D10, No. 4 wiring pins of transformator T2, one end of electric capacity C11 and resistance R14；No. 1 wiring pin conllinear of the other end of electric capacity C11, the other end of resistance R14 and transformator T2；No. 2 wiring pins of transformator T2 concatenate with one end of electric capacity C8；The other end of electric capacity C8 is the signal output part of above-mentioned blood pressure lowering filter circuit.
Further scheme is: the preposition and gain amplifying circuit of above-mentioned signal processing module includes integrated chip U3, resistance R12, resistance R11, resistance R13, resistance R15, electric capacity C7 and electric capacity C10；Integrated chip U3 is the high speed operation amplifier of LM7121 model, and integrated chip U3 has 1 to No. 5 pin；
One end of resistance R12 is the signal input part of above-mentioned preposition and gain amplifying circuit；No. 3 pins of another termination integrated chip U3 of resistance R12；One end conllinear of No. 1 pin of integrated chip U3, one end of resistance R13 and resistance R11；No. 4 pin conllinear of the other end of resistance R13, one end of resistance R15 and integrated chip U3；No. 5 pins of integrated chip U3 and one end of electric capacity C7 have common junction, and this common junction connects the+3.7V power output end of power module；One end of the other end of resistance R11 and electric capacity C10 has common junction, and this common junction is the signal output part of above-mentioned preposition and gain amplifying circuit；The equal ground connection of the other end of No. 2 pins of integrated chip U3, the other end of resistance R15, the other end of electric capacity C7 and electric capacity 10.
Further scheme also has: the core devices of above-mentioned main control module is the CPU of STM32F103 model；The core devices of sampling module is the A/D chip of MCP3204 model；The core devices of temperature compensation module is the temperature sensor chip of DS18B20 model.
The present invention has positive effect: the installation for transformer oil level ultrasonic depth finder of (1) present invention, and it is made up of split type handheld terminal and ultrasound probe, compact structure, be easy to carry, less costly.(2) the installation for transformer oil level ultrasonic depth finder of the present invention, its in use inspector ultrasound probe is clamped on supporting insulation telescopic rod, inspector grips handheld terminal on the other hand, another hand rest is lifted insulation telescopic rod and ultrasound probe is close to installation for transformer surface, can automatically measure oil pillow oil level, easy to use, safety is good.(3) the installation for transformer oil level ultrasonic depth finder of the present invention, it is machine-processed by design and the introducing temperature-compensating of physical circuit so that when it uses, accuracy of detection is higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the schematic block circuit diagram of the present invention；
Fig. 3 is the electrical schematic diagram of the driving module in Fig. 2；
Fig. 4 be the signal processing module in Fig. 2 electrical schematic diagram.
Accompanying drawing labelling in above-mentioned accompanying drawing is as follows:
Ultrasound probe 1, handheld terminal 2, LCD display 21, matrix press-key module 22, buzzer 23, connect cable 3.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
(embodiment 1)
Seeing Fig. 1 and Fig. 2, the installation for transformer oil level ultrasonic depth finder of the present embodiment, it is mainly made up of ultrasound probe 1, handheld terminal 2 and connection cable 3；Connect cable 3 to be electrically connected with handheld terminal 2 by ultrasound probe 1.
Ultrasound probe 1 has housing and the circuit arrangement being arranged in housing；The circuit arrangement being located in ultrasound probe 1 housing includes ultrasonic sensor, drives module and signal processing module；Module is driven to include pwm control circuit and recommend booster circuit；Signal processing module includes blood pressure lowering filter circuit, preposition and gain amplifying circuit；Ultrasonic sensor, each circuit of driving module and each circuit of signal processing module are equipped with signal input part and signal output part.
LCD display 21, matrix press-key module 22, buzzer 23 and the setting circuit arrangement in the enclosure that handheld terminal 2 includes shell, is arranged on shell；The circuit arrangement that handheld terminal 2 is located in shell includes sampling module, main control module, temperature compensation module and power module；Sampling module is provided with signal input part and signal output part；Main control module is provided with pwm signal outfan, detectable signal input, temperature signal input, push button signalling input, display signal output part and alarm signal output ends；LCD display 21 and buzzer 23 are provided with signal input part respectively；Matrix press-key module 22 and temperature compensation module are respectively equipped with signal output part.
The signal input part of ultrasonic sensor electrically connects with the signal output part recommending booster circuit driving module；The signal output part of the signal input part and pwm control circuit of recommending booster circuit electrically connects；The signal input part of pwm control circuit electrically connects with the pwm signal outfan of main control module；The signal input part of blood pressure lowering filter circuit of signal processing module electrically connects with the signal output part of ultrasonic sensor；Preposition and the signal input part of gain amplifying circuit electrically connects with the signal output part of blood pressure lowering filter circuit；Preposition and the signal output part of gain amplifying circuit electrically connects with the signal input part of the sampling module in handheld terminal 2 shell；The signal output part of sampling module electrically connects with the detectable signal input of main control module；The signal input part of LCD display 21 electrically connects with the display signal output part of main control module；The signal input part of buzzer 23 electrically connects with the alarm signal output ends of main control module；The temperature signal input of main control module electrically connects with the signal output part of temperature compensation module；The push button signalling input of main control module electrically connects with the signal output part of matrix press-key module 22；Power module is for providing working power to handheld terminal 2 and ultrasound probe 1, and specifically, power module output+3.7V DC source is powered to ultrasound probe 1；Power module output+3.3V DC source and+5V DC source are powered to handheld terminal 2.
See Fig. 3, drive the pwm control circuit (also can claim pulse-width modulation circuit) of module to be mainly made up of integrated chip U2, resistance R8 and electric capacity C5；Integrated chip U2 is preferably the nor gate logic chip of model 74HC02；Integrated chip U2 has 1 to No. 14 pin.
One end of resistance R8 is the signal input part of aforesaid pwm control circuit；The other end of resistance R8 and the 2 of integrated chip U2,5, No. 6 pin conllinear；No. 4 pins of integrated chip U2 and No. 9 pin electrical connections, No. 3 pins and No. 8 pin electrical connections；No. 7 pins of integrated chip U2 and one end of electric capacity C5 have common junction, and this common junction connects the+3.7V power output end of power module；The other end of electric capacity C5 and No. 14 pin ground connection of integrated chip U2；No. 1 pin of integrated chip U2 and No. 10 pins collectively form the signal output part of aforesaid pwm control circuit；Other pins of integrated chip U2 are vacant.
The booster circuit of recommending driving module includes power step-up unit and recommends boosting unit.Power step-up unit recommends boosting unit use for being given by+3.7V the power boost of power module to+18.5V DC source.
The power step-up unit recommending booster circuit is mainly made up of integrated chip U1, diode D1, diode D2, inductance L1, electric capacity C1, electrochemical capacitor C2, electrochemical capacitor C3, electrochemical capacitor C4, electric capacity C6, resistance R1, resistance R2 and resistance R3；The preferred model of integrated chip U1 is the boost-voltage regulator of LM2577, and it has 1 to No. 5 pin.The positive pole of electrochemical capacitor C2 just has common junction with diode D2's, and this common junction connects the+3.7V power output end of power module；No. 5 pin conllinear of the negative pole of diode D2, one end of inductance L1, one end of electric capacity C1 and integrated chip U1；The positive pole conllinear of No. 4 pins of integrated chip U1, the other end of inductance L1 and diode D1；The negative pole of diode D1, one end of resistance R1, the positive pole of electrochemical capacitor C3 and one end of electric capacity C6 form a common junction because of conllinear, this common junction output+18.5V DC source；No. 2 pin conllinear of the other end of resistance R1, one end of resistance R3 and integrated chip U1；No. 1 pin of integrated chip U1 is concatenated by the positive pole of resistance R2 and electrochemical capacitor C4；No. 3 equal ground connection of pin of the negative pole of electrochemical capacitor C2, electrochemical capacitor C3 negative pole, the negative pole of electrochemical capacitor C4, the other end of electric capacity C1, the other end of electric capacity C6, the other end of resistance R3 and integrated chip U1.
The boosting unit of recommending recommending booster circuit is mainly made up of transformator T1, diode D3, diode D4, diode D5, diode D6, field effect transistor Q1, field effect transistor Q2, resistance R4, resistance R5, resistance R6 and resistance R7；The primary of transformator T1 has No. 3 wiring pins, No. 4 wiring pins (centre tap), No. 5 wiring pins, and secondary has No. 1 and No. 2 wiring pins；Field effect transistor Q1 and field effect transistor Q2 preferably employs IRF540 type N-channel MOS pipe.
One end of resistance R5 and one end of resistance R7 collectively form the aforesaid signal input part recommending booster circuit；The grid conllinear of the other end of resistance R5, one end of resistance R4 and field effect transistor Q1；The grid conllinear of the other end of resistance R7, one end of resistance R6 and field effect transistor Q2；The source ground of the other end of resistance R4, the other end of resistance R6, the source electrode of field effect transistor Q1 and field effect transistor Q2；The drain electrode of field effect transistor Q1 electrically connects with No. 5 wiring pins of transformator T1；The drain electrode of field effect transistor Q2 electrically connects with No. 3 wiring pins of transformator T1；No. 4 wiring pins of transformator T1 connect the+18.5V DC source of power step-up unit output；The negative pole conllinear of No. 2 wiring pins of transformator T1 and the positive pole of diode D3 and diode D4；The negative pole conllinear of No. 1 wiring pin of transformator T1 and the positive pole of diode D5 and diode D6；The negative pole of diode D3 just has 1 common junction with diode D4's, and the negative pole of diode D5 just has 1 common junction with diode D6's, and these 2 common junction collectively form the aforesaid signal output part recommending booster circuit.
The blood pressure lowering filter circuit of signal processing module is mainly made up of transformator T2, diode D7, diode D8, diode D9, diode D10, electric capacity C9, electric capacity C8, electric capacity C11, resistance R9, resistance R10 and resistance R14；The primary of transformator T2 has No. 3 wiring pins, No. 4 wiring pins (centre tap), No. 5 wiring pins, and secondary has No. 1 and No. 2 wiring pins.
One end of resistance R9 and one end of resistance R10 collectively form the signal input part of aforesaid blood pressure lowering filter circuit；No. 3 wiring pin conllinear of the other end of resistance R9, the positive pole of diode D7, the negative pole of diode D8, one end of electric capacity C9 and transformator T2；No. 5 wiring pin conllinear of the other end of resistance R10, the positive pole of diode D9, the negative pole of diode D10, the other end of electric capacity C9 and transformator T2；The equal ground connection in one end of the negative pole of diode D7, the positive pole of diode D8, the negative pole of diode D9, the positive pole of diode D10, No. 4 wiring pins of transformator T2, one end of electric capacity C11 and resistance R14；No. 1 wiring pin conllinear of the other end of electric capacity C11, the other end of resistance R14 and transformator T2；No. 2 wiring pins of transformator T2 concatenate with one end of electric capacity C8；The other end of electric capacity C8 is the signal output part of aforesaid blood pressure lowering filter circuit.
Preposition and the gain amplifying circuit of signal processing module is mainly made up of integrated chip U3, resistance R12, resistance R11, resistance R13, resistance R15, electric capacity C7 and electric capacity C10；Integrated chip U3 preferably employs the high speed operation amplifier of LM7121 model, and integrated chip U3 has 1 to No. 5 pin.
One end of resistance R12 is aforesaid preposition and gain amplifying circuit signal input part；No. 3 pins of another termination integrated chip U3 of resistance R12；One end conllinear of No. 1 pin of integrated chip U3, one end of resistance R13 and resistance R11；No. 4 pin conllinear of the other end of resistance R13, one end of resistance R15 and integrated chip U3；No. 5 pins of integrated chip U3 and one end of electric capacity C7 have common junction, and this common junction connects the+3.7V power output end of power module；One end of the other end of resistance R11 and electric capacity C10 has common junction, and this common junction is aforesaid preposition and gain amplifying circuit signal output part；The equal ground connection of the other end of No. 2 pins of integrated chip U3, the other end of resistance R15, the other end of electric capacity C7 and electric capacity 10.
The core devices of the main control module in prior hand held terminal 2 is the CPU of STM32F103 model；The core devices of sampling module is the A/D chip of MCP3204 model；The core devices of temperature compensation module is the temperature sensor chip of DS18B20 model.
The installation for transformer oil level ultrasonic depth finder of the present embodiment, its operation principle is summarized as follows:
The installation for transformer oil level ultrasonic depth finder of the present embodiment, it adopts ultrasonic pulse attenuation method oil level, during use, the PWM module output frequency built-in for CPU of the STM32F103 model of the main control module in handheld terminal 2 be 500KHz, dutycycle 50% a road PWM square-wave signal give drive module pwm control circuit；Waveform is after the 74HC02 integrated chip of pwm control circuit, generation frequency is 500KHz, dutycycle be 50% the complementary square-wave signal in 2 tunnels, it is used for driving push-pull transformer T1, + 18.5V the direct current signal that the power step-up unit recommending booster circuit driving module produces is risen to Vpp=450V(Vpp and exchanges minimum to peak voltage, peak-to-peak value) AC signal, this signal, as driving source, drives ultrasonic sensor to launch ultrasound wave to installation for transformer；The echo-signal that ultrasonic sensor receives sends a signal to the sampling module in handheld terminal 2 through the blood pressure lowering filter circuit of signal processing module, preposition and gain amplifying circuit after processing, and analog quantity is converted to the digital quantity that can calculate by MCP3204 chip and is sent to the oil level that the CPU process of main control module is judged in installation for transformer by sampling module.
Consider that the propagation attenuation of sound is influenced by temperature, in order to make measurement result more accurate, introduce temperature compensation function, being thered is provided real time temperature information when detecting by temperature compensation module to the CPU of main control module, the CPU of main control module considers that temperature factor reprocesses the oil level judging in installation for transformer in the lump.
LCD display 21 is for showing the information such as the ultrasonic signal strength, temperature, time and the parameter that receive.
Matrix press-key module 22 adopts 4*4 matrix keyboard, is mainly used in the configuration of the parameter of ultrasonic sensor, as the digital filtering degree of depth of signal sampling, the signal threshold value of buzzer output, clock setting etc. function.
The buzzer 23 signal intensity for returning according to the ultrasound probe received when main control module, during by calculating the oil level judging in installation for transformer, sends tweeting sound and reminds staff.
The installation for transformer oil level ultrasonic depth finder of the present embodiment, it is made up of split type handheld terminal and ultrasound probe, compact structure, be easy to carry, less costly；Its in use inspector ultrasound probe is clamped on supporting insulation telescopic rod, inspector stands in ground and grips handheld terminal on the other hand, and another hand rest is lifted insulation telescopic rod and ultrasound probe is close to installation for transformer surface, can automatically measure oil pillow oil level, easy to use, safety is good；And it is machine-processed by design and the introducing temperature-compensating of physical circuit so that when it uses, accuracy of detection is higher.
Above example is the explanation to the specific embodiment of the present invention; but not limitation of the present invention; person skilled in the relevant technique is without departing from the spirit and scope of the present invention; can also making various conversion and change and obtain corresponding equivalent technical scheme, therefore all equivalent technical schemes all should be included into the scope of patent protection of the present invention.
Claims (6)
1. an installation for transformer oil level ultrasonic depth finder, it is characterised in that: include ultrasound probe, handheld terminal and the connection cable electrically connected by ultrasound probe with handheld terminal；
Described ultrasound probe has housing and the circuit arrangement being arranged in housing；The circuit arrangement being located in ultrasound probe housing includes ultrasonic sensor, drives module and signal processing module；Module is driven to include pwm control circuit and recommend booster circuit；Signal processing module includes blood pressure lowering filter circuit, preposition and gain amplifying circuit；Ultrasonic sensor, each circuit of driving module and each circuit of signal processing module are equipped with signal input part and signal output part；
LCD display, matrix press-key module, buzzer and the setting circuit arrangement in the enclosure that handheld terminal includes shell, is arranged on shell；The circuit arrangement being located in handheld terminal shell includes sampling module, main control module, temperature compensation module and power module；Sampling module is provided with signal input part and signal output part；Main control module is provided with pwm signal outfan, detectable signal input, temperature signal input, push button signalling input, display signal output part and alarm signal output ends；LCD display and buzzer are provided with signal input part respectively；Matrix press-key module and temperature compensation module are respectively equipped with signal output part；
The signal input part of ultrasonic sensor electrically connects with the signal output part recommending booster circuit driving module；The signal output part of the signal input part and pwm control circuit of recommending booster circuit electrically connects；The signal input part of pwm control circuit electrically connects with the pwm signal outfan of main control module；The signal input part of blood pressure lowering filter circuit of signal processing module electrically connects with the signal output part of ultrasonic sensor；Preposition and the signal input part of gain amplifying circuit electrically connects with the signal output part of blood pressure lowering filter circuit；Preposition and the signal output part of gain amplifying circuit electrically connects with the signal input part of the sampling module in handheld terminal；The signal output part of sampling module electrically connects with the detectable signal input of main control module；The signal input part of LCD display electrically connects with the display signal output part of main control module；The signal input part of buzzer electrically connects with the alarm signal output ends of main control module；The temperature signal input of main control module electrically connects with the signal output part of temperature compensation module；The push button signalling input of main control module electrically connects with the signal output part of matrix press-key module；Power module output+3.7V DC source is powered to ultrasound probe；Power module output+3.3V DC source and+5V DC source are powered to handheld terminal.
2. installation for transformer oil level ultrasonic depth finder according to claim 1, it is characterised in that: the pwm control circuit of described driving module includes integrated chip U2, resistance R8 and electric capacity C5；Integrated chip U2 is the integrated chip of model 74HC02；Integrated chip U2 has 1 to No. 14 pin；
One end of resistance R8 is the signal input part of described pwm control circuit；The other end of resistance R8 and the 2 of integrated chip U2,5, No. 6 pin conllinear；No. 4 pins of integrated chip U2 and No. 9 pin electrical connections, No. 3 pins and No. 8 pin electrical connections；No. 7 pins of integrated chip U2 and one end of electric capacity C5 have common junction, and this common junction connects the+3.7V power output end of power module；The other end of electric capacity C5 and No. 14 pin ground connection of integrated chip U2；No. 1 pin of integrated chip U2 and No. 10 pins collectively form the signal output part of described pwm control circuit.
3. installation for transformer oil level ultrasonic depth finder according to claim 1, it is characterised in that: the booster circuit of recommending of described driving module includes power step-up unit and recommends boosting unit；
The power step-up unit recommending booster circuit includes integrated chip U1, diode D1, diode D2, inductance L1, electric capacity C1, electrochemical capacitor C2, electrochemical capacitor C3, electrochemical capacitor C4, electric capacity C6, resistance R1, resistance R2 and resistance R3；Integrated chip U1 is the boost-voltage regulator of LM2577 model, and it has 1 to No. 5 pin；
The positive pole of electrochemical capacitor C2 just has common junction with diode D2's, and this common junction connects the+3.7V power output end of power module；No. 5 pin conllinear of the negative pole of diode D2, one end of inductance L1, one end of electric capacity C1 and integrated chip U1；The positive pole conllinear of No. 4 pins of integrated chip U1, the other end of inductance L1 and diode D1；The negative pole of diode D1, one end of resistance R1, the positive pole of electrochemical capacitor C3 and one end of electric capacity C6 form a common junction because of conllinear, this common junction output+18.5V DC source；No. 2 pin conllinear of the other end of resistance R1, one end of resistance R3 and integrated chip U1；No. 1 pin of integrated chip U1 is concatenated by the positive pole of resistance R2 and electrochemical capacitor C4；No. 3 equal ground connection of pin of the negative pole of electrochemical capacitor C2, electrochemical capacitor C3 negative pole, the negative pole of electrochemical capacitor C4, the other end of electric capacity C1, the other end of electric capacity C6, the other end of resistance R3 and integrated chip U1；
The boosting unit of recommending recommending booster circuit includes transformator T1, diode D3, diode D4, diode D5, diode D6, field effect transistor Q1, field effect transistor Q2, resistance R4, resistance R5, resistance R6 and resistance R7；The primary of transformator T1 has 3,4, No. 5 wiring pins, and secondary has No. 1 and No. 2 wiring pins；
One end of resistance R5 and one end of resistance R7 collectively form the described signal input part recommending booster circuit；The grid conllinear of the other end of resistance R5, one end of resistance R4 and field effect transistor Q1；The grid conllinear of the other end of resistance R7, one end of resistance R6 and field effect transistor Q2；The source ground of the other end of resistance R4, the other end of resistance R6, the source electrode of field effect transistor Q1 and field effect transistor Q2；The drain electrode of field effect transistor Q1 electrically connects with No. 5 wiring pins of transformator T1；The drain electrode of field effect transistor Q2 electrically connects with No. 3 wiring pins of transformator T1；No. 4 wiring pins of transformator T1 connect the+18.5V DC source of power step-up unit output；The negative pole conllinear of No. 2 wiring pins of transformator T1 and the positive pole of diode D3 and diode D4；The negative pole conllinear of No. 1 wiring pin of transformator T1 and the positive pole of diode D5 and diode D6；The negative pole of diode D3 just has 1 common junction with diode D4's, and the negative pole of diode D5 just has 1 common junction with diode D6's, and these 2 common junction collectively form the described signal output part recommending booster circuit.
4. installation for transformer oil level ultrasonic depth finder according to claim 1, it is characterised in that: the blood pressure lowering filter circuit of described signal processing module includes transformator T2, diode D7, diode D8, diode D9, diode D10, electric capacity C9, electric capacity C8, electric capacity C11, resistance R9, resistance R10 and resistance R14；The primary of transformator T2 has 3,4, No. 5 wiring pins, and secondary has No. 1 and No. 2 wiring pins；
One end of resistance R9 and one end of resistance R10 collectively form the signal input part of described blood pressure lowering filter circuit；No. 3 wiring pin conllinear of the other end of resistance R9, the positive pole of diode D7, the negative pole of diode D8, one end of electric capacity C9 and transformator T2；No. 5 wiring pin conllinear of the other end of resistance R10, the positive pole of diode D9, the negative pole of diode D10, the other end of electric capacity C9 and transformator T2；The equal ground connection in one end of the negative pole of diode D7, the positive pole of diode D8, the negative pole of diode D9, the positive pole of diode D10, No. 4 wiring pins of transformator T2, one end of electric capacity C11 and resistance R14；No. 1 wiring pin conllinear of the other end of electric capacity C11, the other end of resistance R14 and transformator T2；No. 2 wiring pins of transformator T2 concatenate with one end of electric capacity C8；The other end of electric capacity C8 is the signal output part of described blood pressure lowering filter circuit.
5. installation for transformer oil level ultrasonic depth finder according to claim 1, it is characterised in that: the preposition and gain amplifying circuit of described signal processing module includes integrated chip U3, resistance R12, resistance R11, resistance R13, resistance R15, electric capacity C7 and electric capacity C10；Integrated chip U3 is the high speed operation amplifier of LM7121 model, and integrated chip U3 has 1 to No. 5 pin；
One end of resistance R12 is the signal input part of described preposition and gain amplifying circuit；No. 3 pins of another termination integrated chip U3 of resistance R12；One end conllinear of No. 1 pin of integrated chip U3, one end of resistance R13 and resistance R11；No. 4 pin conllinear of the other end of resistance R13, one end of resistance R15 and integrated chip U3；No. 5 pins of integrated chip U3 and one end of electric capacity C7 have common junction, and this common junction connects the+3.7V power output end of power module；One end of the other end of resistance R11 and electric capacity C10 has common junction, and this common junction is the signal output part of described preposition and gain amplifying circuit；The equal ground connection of the other end of No. 2 pins of integrated chip U3, the other end of resistance R15, the other end of electric capacity C7 and electric capacity 10.
6. installation for transformer oil level ultrasonic depth finder according to claim 1, it is characterised in that: the core devices of described main control module is the CPU of STM32F103 model；The core devices of sampling module is the A/D chip of MCP3204 model；The core devices of temperature compensation module is the temperature sensor chip of DS18B20 model.
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| CN201610266107.XA CN105784071A (en) | 2016-04-26 | 2016-04-26 | Oil level ultrasonoscope for transformer oil conservator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017603A (en) * | 2016-08-10 | 2016-10-12 | 瑞安市中申电器有限公司 | Fuel volume digital displayer |
| WO2020062934A1 (en) * | 2018-09-28 | 2020-04-02 | 伊玛精密电子（苏州）有限公司 | Intelligent ultrasonic material level sensor |
| CN111351551A (en) * | 2020-03-27 | 2020-06-30 | 泰华智慧产业集团股份有限公司 | Accurate temperature compensation ultrasonic liquid level detection method and system |
| CN113029291A (en) * | 2021-03-17 | 2021-06-25 | 国网上海市电力公司 | Ultrasonic oil level monitoring device for transformer based on narrow-band Internet of things technology |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4599892A (en) * | 1984-12-04 | 1986-07-15 | Doshi Navin H | Volume measuring apparatus |
| EP1866612A1 (en) * | 2005-04-04 | 2007-12-19 | Endress u. Hauser GmbH u.Co. KG | Device for determining and/or monitoring a process variable of a medium |
| CN101373937A (en) * | 2008-10-08 | 2009-02-25 | 南京航空航天大学 | Ultrasound motor drive controller based on embedded system level chip |
| CN101865716A (en) * | 2010-06-10 | 2010-10-20 | 上海三高计算机中心股份有限公司 | Urban drainage pipe network water level information monitoring system |
| CN102403083A (en) * | 2010-09-07 | 2012-04-04 | 中国石油天然气集团公司 | Pipeline port hysteresis buffer demagnetization method and demagnetizer |
| CN103674181A (en) * | 2013-12-04 | 2014-03-26 | 江苏大学 | Dynamic liquid level ultrasonic detection device and method |
| CN103697968A (en) * | 2013-11-25 | 2014-04-02 | 苏州克兰兹电子科技有限公司 | Ultrasonic liquid level tracker system and method based on low-power-consumption single-chip microcomputer |
| CN104897245A (en) * | 2015-06-04 | 2015-09-09 | 华北水利水电大学 | Zigbee-based multi-point acquisition self-correction water level detector and measuring method |
| CN105162348A (en) * | 2015-08-28 | 2015-12-16 | 苏州市博得立电源科技有限公司 | STM32-based high-performance all-digital sine wave inverter power supply |
| CN205719179U (en) * | 2016-04-26 | 2016-11-23 | 江苏省电力公司常州供电公司 | A kind of installation for transformer oil level ultrasonic depth finder |
-
2016
- 2016-04-26 CN CN201610266107.XA patent/CN105784071A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4599892A (en) * | 1984-12-04 | 1986-07-15 | Doshi Navin H | Volume measuring apparatus |
| EP1866612A1 (en) * | 2005-04-04 | 2007-12-19 | Endress u. Hauser GmbH u.Co. KG | Device for determining and/or monitoring a process variable of a medium |
| CN101373937A (en) * | 2008-10-08 | 2009-02-25 | 南京航空航天大学 | Ultrasound motor drive controller based on embedded system level chip |
| CN101865716A (en) * | 2010-06-10 | 2010-10-20 | 上海三高计算机中心股份有限公司 | Urban drainage pipe network water level information monitoring system |
| CN102403083A (en) * | 2010-09-07 | 2012-04-04 | 中国石油天然气集团公司 | Pipeline port hysteresis buffer demagnetization method and demagnetizer |
| CN103697968A (en) * | 2013-11-25 | 2014-04-02 | 苏州克兰兹电子科技有限公司 | Ultrasonic liquid level tracker system and method based on low-power-consumption single-chip microcomputer |
| CN103674181A (en) * | 2013-12-04 | 2014-03-26 | 江苏大学 | Dynamic liquid level ultrasonic detection device and method |
| CN104897245A (en) * | 2015-06-04 | 2015-09-09 | 华北水利水电大学 | Zigbee-based multi-point acquisition self-correction water level detector and measuring method |
| CN105162348A (en) * | 2015-08-28 | 2015-12-16 | 苏州市博得立电源科技有限公司 | STM32-based high-performance all-digital sine wave inverter power supply |
| CN205719179U (en) * | 2016-04-26 | 2016-11-23 | 江苏省电力公司常州供电公司 | A kind of installation for transformer oil level ultrasonic depth finder |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017603A (en) * | 2016-08-10 | 2016-10-12 | 瑞安市中申电器有限公司 | Fuel volume digital displayer |
| WO2020062934A1 (en) * | 2018-09-28 | 2020-04-02 | 伊玛精密电子（苏州）有限公司 | Intelligent ultrasonic material level sensor |
| CN111351551A (en) * | 2020-03-27 | 2020-06-30 | 泰华智慧产业集团股份有限公司 | Accurate temperature compensation ultrasonic liquid level detection method and system |
| CN111351551B (en) * | 2020-03-27 | 2022-01-07 | 泰华智慧产业集团股份有限公司 | Accurate temperature compensation ultrasonic liquid level detection method and system |
| CN113029291A (en) * | 2021-03-17 | 2021-06-25 | 国网上海市电力公司 | Ultrasonic oil level monitoring device for transformer based on narrow-band Internet of things technology |
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Application publication date: 20160720 |