CN205719179U - A kind of installation for transformer oil level ultrasonic depth finder - Google Patents
A kind of installation for transformer oil level ultrasonic depth finder Download PDFInfo
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- CN205719179U CN205719179U CN201620359033.XU CN201620359033U CN205719179U CN 205719179 U CN205719179 U CN 205719179U CN 201620359033 U CN201620359033 U CN 201620359033U CN 205719179 U CN205719179 U CN 205719179U
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- 238000009434 installation Methods 0.000 title claims abstract description 21
- 238000002604 ultrasonography Methods 0.000 claims abstract description 29
- 239000000523 sample Substances 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 18
- 230000036772 blood pressure Effects 0.000 claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 230000011664 signaling Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 10
- 239000003990 capacitor Substances 0.000 description 18
- 230000005669 field effect Effects 0.000 description 18
- 238000009413 insulation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Abstract
This utility model provides a kind of installation for transformer oil level ultrasonic depth finder, including ultrasound probe and the handheld terminal being connected electrically；Circuit arrangement in ultrasound probe includes ultrasonic sensor, by pwm control circuit with recommend driving module that booster circuit forms and the signal processing module being made up of blood pressure lowering filter circuit, preposition and gain amplifying circuit；The circuit arrangement of handheld terminal includes sampling module, main control module, temperature compensation module, LCD display, matrix press-key module, buzzer and power module；Pwm control circuit electrically connects with main control module；The sampled module of preposition and gain amplifying circuit electrically connects with main control module.This utility model compact structure, be easy to carry, cost is relatively low, property easy to use, safe is good and use time accuracy of detection higher.
Description
Technical field
This utility model relates to transformator detection field of tool, is 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 the scope of certain, and too high or too low all can the causing the operation of transformator 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 to check oil pillow oil level or detect in transformator running.Traditional oil pillow oil level detection is general uses 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: the indoor that oil level checks device maintenance difficult when breaking down, accuracy of detection is the highest, manual observation error is bad compared with big, night or 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 technology develops quickly, the application of electronic type liquid level emasuring device is increasingly extensive, in terms of the detection of installation for transformer oil level, this type of detection device is also shown in research, if application publication number is CN 105043506A, the Chinese patent literature of invention entitled " a kind of power transformer ultrasound wave oil pillow oil level detector ", i.e. provide a kind of power transformer ultrasound wave oil pillow oil level detector, 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.
Utility model content
The purpose of this utility model is: provide a kind of compact structure, be easy to carry, accuracy of detection higher installation for transformer oil level ultrasonic depth finder time cost is relatively low, property easy to use, safe is good and uses.
The technical solution of the utility model is: installation for transformer oil level ultrasonic depth finder of the present utility model, and 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；Each circuit of ultrasonic sensor, each circuit of driving module and signal processing module is equipped with signal input part and signal output part；
Handheld terminal includes shell, the LCD display being arranged on shell, matrix press-key module, buzzer and setting circuit arrangement in the enclosure；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 2,5, No. 6 pin conllinear of integrated chip U2；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, the other end of inductance L1 and the diode D1 of integrated chip U1；One end of the negative pole of diode D1, one end of resistance R1, the positive pole of electrochemical capacitor C3 and electric capacity C6 forms a common junction, this common junction output+18.5V DC source because of conllinear；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 other end of resistance R4, the other end of resistance R6, the source electrode of field effect transistor Q1 and the source ground of 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；No. 2 wiring pins of transformator T1 and the positive pole of diode D3 and the negative pole conllinear of diode D4；No. 1 wiring pin of transformator T1 and the positive pole of diode D5 and the negative pole conllinear of 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 negative pole of diode D7, the positive pole of diode D8, the negative pole of diode D9, the positive pole of diode D10, the equal ground connection in one end of No. 4 wiring pins, one end of electric capacity C11 and resistance R14 of transformator T2；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 the integrated chip U3 of another termination of resistance R12；One end conllinear of No. 1 pin, one end of resistance R13 and the resistance R11 of integrated chip U3；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；The other end of resistance R11 has common junction with one end of electric capacity C10, 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, the other end of resistance R15, the other end of electric capacity C7 and the electric capacity 10 of integrated chip U3.
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.
This utility model has a positive effect: (1) installation for transformer of the present utility model oil level ultrasonic depth finder, and it is made up of split type handheld terminal and ultrasound probe, compact structure, be easy to carry, cost relatively low.(2) installation for transformer oil level ultrasonic depth finder of the present utility model, 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) installation for transformer oil level ultrasonic depth finder of the present utility model, 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 structural representation of the present utility model；
Fig. 2 is schematic block circuit diagram of the present utility model；
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.
Reference 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
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings.
(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；Each circuit of ultrasonic sensor, each circuit of driving module and signal processing module is 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 2,5, No. 6 pin conllinear of integrated chip U2；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 integrated preferred model of 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, the other end of inductance L1 and the diode D1 of integrated chip U1；One end of the negative pole of diode D1, one end of resistance R1, the positive pole of electrochemical capacitor C3 and electric capacity C6 forms a common junction, this common junction output+18.5V DC source because of conllinear；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 employ 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 other end of resistance R4, the other end of resistance R6, the source electrode of field effect transistor Q1 and the source ground of 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；No. 2 wiring pins of transformator T1 and the positive pole of diode D3 and the negative pole conllinear of diode D4；No. 1 wiring pin of transformator T1 and the positive pole of diode D5 and the negative pole conllinear of 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 negative pole of diode D7, the positive pole of diode D8, the negative pole of diode D9, the positive pole of diode D10, the equal ground connection in one end of No. 4 wiring pins, one end of electric capacity C11 and resistance R14 of transformator T2；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 the aforesaid preposition and signal input part of gain amplifying circuit；No. 3 pins of the integrated chip U3 of another termination of resistance R12；One end conllinear of No. 1 pin, one end of resistance R13 and the resistance R11 of integrated chip U3；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；The other end of resistance R11 has common junction with one end of electric capacity C10, and this common junction is the aforesaid preposition and signal output part of gain amplifying circuit；The equal ground connection of the other end of No. 2 pins, the other end of resistance R15, the other end of electric capacity C7 and the electric capacity 10 of integrated chip U3.
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 uses 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 is 500KHz, a road PWM square-wave signal of dutycycle 50% gives the pwm control circuit driving module；Waveform is after the integrated chip of 74HC02 of pwm control circuit, the complementary square-wave signal in 2 tunnels that generation frequency is 500KHz, dutycycle is 50%, 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 rises to Vpp=450V, and (Vpp exchange minimum is 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 after the blood pressure lowering filter circuit of signal processing module, preposition and gain amplifying circuit process, the oil level that sampling module is sent in installation for transformer is judged in the CPU process of main control module by the digital quantity that analog quantity is converted to calculate by MCP3204 chip.
Propagation attenuation in view of sound is influenced by temperature, in order to make measurement result more accurate, introduce temperature compensation function, by temperature compensation module real time temperature information when the CPU of main control module provides detection, the CPU of main control module considers the oil level that temperature factor reprocessing is judged in installation for transformer in the lump.
The information such as ultrasonic signal strength, temperature, time and the parameter that LCD display 21 receives for display.
Matrix press-key module 22 uses 4*4 matrix keyboard, is mainly used in the configuration of the parameter of ultrasonic sensor, such as the digital filtering degree of depth of signal sampling, the signal threshold value of buzzer output, setting etc. the function of clock.
Buzzer 23 is for the signal intensity returned according to the ultrasound probe received when main control module, when being judged the oil level in installation for transformer by calculating, 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, cost relatively low；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 detailed description of the invention of the present utility model; rather than to restriction of the present utility model; person skilled in the relevant technique is in the case of without departing from spirit and scope of the present utility model; can also make various conversion and change and obtain the technical scheme of corresponding equivalent, the technical scheme of the most all equivalents all should be included into scope of patent protection of the present utility model.
Claims (1)
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；Each circuit of ultrasonic sensor, each circuit of driving module and signal processing module is equipped with signal input part and signal output part；
Handheld terminal includes shell, the LCD display being arranged on shell, matrix press-key module, buzzer and setting circuit arrangement in the enclosure；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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620359033.XU CN205719179U (en) | 2016-04-26 | 2016-04-26 | A kind of installation for transformer oil level ultrasonic depth finder |
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| CN201620359033.XU CN205719179U (en) | 2016-04-26 | 2016-04-26 | A kind of installation for transformer oil level ultrasonic depth finder |
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| Country | Link |
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| CN (1) | CN205719179U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784071A (en) * | 2016-04-26 | 2016-07-20 | 江苏省电力公司常州供电公司 | Oil level ultrasonoscope for transformer oil conservator |
| CN108279055A (en) * | 2018-04-18 | 2018-07-13 | 国网上海市电力公司 | A kind of non-intervention type transformer oil level detection device |
| CN109932723A (en) * | 2019-03-28 | 2019-06-25 | 国网新疆电力有限公司喀什供电公司 | Inside transformer structure detection device and application method |
-
2016
- 2016-04-26 CN CN201620359033.XU patent/CN205719179U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784071A (en) * | 2016-04-26 | 2016-07-20 | 江苏省电力公司常州供电公司 | Oil level ultrasonoscope for transformer oil conservator |
| CN108279055A (en) * | 2018-04-18 | 2018-07-13 | 国网上海市电力公司 | A kind of non-intervention type transformer oil level detection device |
| CN109932723A (en) * | 2019-03-28 | 2019-06-25 | 国网新疆电力有限公司喀什供电公司 | Inside transformer structure detection device and application method |
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Granted publication date: 20161123 |