WO2020062934A1 - Capteur ultrasonore intelligent de niveau de matière - Google Patents

Capteur ultrasonore intelligent de niveau de matière Download PDF

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Publication number
WO2020062934A1
WO2020062934A1 PCT/CN2019/091043 CN2019091043W WO2020062934A1 WO 2020062934 A1 WO2020062934 A1 WO 2020062934A1 CN 2019091043 W CN2019091043 W CN 2019091043W WO 2020062934 A1 WO2020062934 A1 WO 2020062934A1
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WO
WIPO (PCT)
Prior art keywords
unit
circuit
display
output
ultrasonic
Prior art date
Application number
PCT/CN2019/091043
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English (en)
Chinese (zh)
Inventor
陈怡因
Original Assignee
伊玛精密电子（苏州）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201811142695.1A external-priority patent/CN108871503A/zh
Priority claimed from CN201821593525.0U external-priority patent/CN208998894U/zh
Application filed by 伊玛精密电子（苏州）有限公司 filed Critical 伊玛精密电子（苏州）有限公司
Publication of WO2020062934A1 publication Critical patent/WO2020062934A1/fr

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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
    • 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
    • G01F23/80—Arrangements for signal processing
    • G01F23/802—Particular electronic circuits for digital processing equipment
    • G01F23/804—Particular electronic circuits for digital processing equipment containing circuits handling parameters other than liquid level

Definitions

  • the invention relates to a material level detection instrument in the instrumentation industry, and particularly to an intelligent ultrasonic material level sensor.
  • the ultrasonic level sensor is used in the level monitoring system. When the level reaches the set level threshold, a detection signal is generated to start the chain control system.
  • the traditional ultrasonic level sensor has a complicated and bulky structure, difficult installation, and precision is easily affected by temperature. It has poor anti-interference ability and single function. It does not have the functions of fully automatic control, alarm, and activation of chain protection system for detection signals. Most of them are mainly potting, with complicated technology, inconvenient maintenance, poor corrosion resistance, large volume, and insufficient aesthetic appearance.
  • the object of the present invention is to provide an intelligent ultrasonic level sensor with high reliability, accurate detection accuracy, not affected by temperature, strong anti-interference ability, corrosion resistance, small size, and installation.
  • the present invention provides an intelligent ultrasonic level sensor, which includes an upper cover, a casing, a probe, and a circuit part.
  • the casing is provided with a fixed bracket, and the fixed bracket is used for installing Said circuit portion;
  • said circuit portion is disposed in said housing, said circuit portion includes a power conversion module, an ultrasonic transducer unit, an ultrasonic drive circuit, a meter amplifier circuit, a filter amplifier circuit, a gain adjustment module, a central processing unit, Temperature filtering circuit;
  • the ultrasonic transducer unit includes a signal receiving and transmitting unit and a temperature detecting unit, and the ultrasonic transducer unit is disposed inside the probe.
  • an output end of the temperature detection unit is connected to a temperature filter circuit, and an output signal of the temperature filter circuit is input to a central processing unit for processing; an ultrasonic drive circuit whose input end is connected to the central processing unit and whose output end is The ultrasonic transducer unit is connected for ultrasonic transmission; the output signal of the ultrasonic transducer unit is input to the instrument amplification circuit for first-stage signal amplification; the output end of the instrument amplification circuit is connected to the filter amplification circuit for secondary amplification; The output signal of the filter amplifier circuit is input to the central processing unit for analysis and processing; the input terminal of the gain adjustment module is connected to the central processing unit, and the output terminal is connected to the instrument amplifier circuit for first-stage amplification gain adjustment; as data processing
  • the central processing unit of the controller is provided with a temperature compensation unit and a time distance calculation unit.
  • the circuit part further includes an output unit and an output protection unit.
  • the input end of the output unit is connected to the central processing circuit, and the switching value output of the monitoring distance signal is performed by an NPN transistor or a PNP transistor, and the current is 4-20 mA or voltage. 0 ⁇ 10V performs analog output of the monitoring distance signal; the input end of the output protection unit is connected to the output unit. Achieve short circuit protection, reverse polarity protection, overload protection, etc.
  • the circuit part further includes a display driving unit and a display unit, an input end of which is connected to the central processing unit, and an output end of which is connected to the display unit for display signal output; and the ultrasonic transducer unit separately collects and measures the measured signals.
  • the ambient temperature signal and the distance signal are transmitted to the central processing unit, and the processed data are output through the output unit and the display unit displays a numerical signal, respectively.
  • the circuit part further includes a key control unit, and the key control unit and the display unit constitute a menu system through a central processing unit for user interaction.
  • the menu system can simulate the output mode and switch point of the switch output.
  • the output mode and height of the volume output and the learning and restoration of the ultrasonic sound speed and factory settings can be adjusted or corrected; at the same time, the current distance, temperature, or current and voltage can be displayed through the key control unit settings.
  • the key control unit is composed of keys, and the keys are used for menu setting and function selection;
  • the display unit is composed of three seven-segment digital tubes and six LED lights, and three seven-segment digital tubes are used for temperature display and target distance Value display and current or voltage value display, 6 LED lights are displayed as status lights, and the display unit is set in the display cover.
  • the power conversion module is provided with an anti-interference, anti-static, and anti-lightning isolation component.
  • the isolation component includes a magnetic bead and a choke coil.
  • the choke coil is disposed at the input end of the power supply and is contained in the suppression circuit.
  • a magnetic bead is connected in parallel behind the choke coil to eliminate high-frequency interference signals in the circuit;
  • the power supply unit is connected to the casing and connected to the ground to release the inside of the circuit Excess charge and interference.
  • the upper cover is provided with a display cover, a button, and a connector.
  • the display cover includes a distance display unit, and the display cover is fixed from the inside of the upper cover by a pressing piece to display the current target distance, temperature, and current.
  • Value or voltage value display and status display keys are loaded from the surface of the housing to learn menu settings and function selections such as calibration target distance high and low points, switch point selection, etc .; a seal is provided on the connector, from the side of the upper cover
  • the round hole extends into the shell, and the connector is used to connect external cables to supply power to the circuit part; plastic parts are used to fix the circuit part, which plays a role of anti-vibration, insulation and anti-interference.
  • the probe includes a pressure ring, a seal ring, a transducer gasket, and an ultrasonic transducer unit.
  • the transducer gasket wraps the ultrasonic transducer unit, and the transducer gasket can reduce the transducer's ultrasonic energy conversion.
  • the pressure of the transducer unit, the sealing ring acts as a seal when the interference fit between the pressure ring, the ultrasonic transducer unit and the probe; a round hole is provided on the top of the pressure ring, and the round hole is used to strengthen the product Anti-interference ability ground wire.
  • the probe is provided with a blind hole in the center of the cylinder, and a step is provided at each of the top, middle and bottom of the blind hole.
  • the top step is provided with the fixed bracket, and the middle step is provided with the pressure ring.
  • the ultrasonic transducer unit is placed on the bottom step, and the pressure ring is used to fix the ultrasonic transducer unit.
  • the fixing bracket is disposed in the housing, and the fixing bracket is two symmetrical plastic pieces, the plastic pieces are semi-elliptical, and a bayonet is provided on the inner wall of the semi-ellipse for fixing
  • the circuit board has the functions of anti-vibration, shielding and anti-interference.
  • the housing and the probe are both made of acid and alkali resistant materials;
  • the ultrasonic transducer unit is made of polyvinylidene fluoride, polytetrafluoroethylene, titanium alloy or stainless steel 316L. Has strong corrosion resistance.
  • the overall height of the housing after being assembled with the probe is not higher than 82.5mm.
  • the intelligent ultrasonic level sensor provided by the present invention has the following beneficial effects: high reliability, accurate detection accuracy, not affected by temperature, strong anti-interference ability, sound speed learning function, and can easily pass It can be realized by the key learning method, and it can reach IP68 protection level without potting.
  • the structure and technology are simple, the cost is low, the maintenance is convenient, the corrosion resistance is small, the shape is beautiful, and the corrosion-resistant all-metal ultrasonic level sensor is easy to install.
  • Figure 1 is a working principle diagram of an intelligent ultrasonic level sensor.
  • Figure 2 is a sectional view of an intelligent ultrasonic level sensor.
  • Figure 3 is a schematic diagram of the external structure of an intelligent ultrasonic level sensor.
  • Figure 4 is an exploded view of an intelligent ultrasonic level sensor.
  • the present invention provides an intelligent ultrasonic level sensor, which includes an upper cover, a housing, a probe, and a circuit part.
  • the housing is provided with a fixed bracket, and the fixed bracket is used for installing the Said circuit portion;
  • said circuit portion is disposed in said housing, said circuit portion includes a power conversion module, an ultrasonic transducer unit, an ultrasonic drive circuit, a meter amplifier circuit, a filter amplifier circuit, a gain adjustment module, a central processing unit, Temperature filtering circuit;
  • the ultrasonic transducer unit includes a signal receiving and transmitting unit and a temperature detecting unit, and the ultrasonic transducer unit is disposed inside the probe.
  • An output terminal of the temperature detection unit is connected to a temperature filter circuit, and an output signal of the temperature filter circuit is input to a central processing unit for processing; an ultrasonic drive circuit has an input terminal connected to the central processing unit, and an output terminal of the temperature drive circuit to an ultrasonic transducer.
  • the transducer unit is connected for ultrasonic transmission; the output signal of the ultrasonic transducer unit is input to the instrumentation amplifier circuit for first-stage signal amplification; the output end of the instrumentation amplifier circuit is connected to the filter amplifier circuit for secondary amplification; the filter amplifier
  • the output signal of the circuit is input to the central processing unit for analysis and processing; the input terminal of the gain adjustment module is connected to the central processing unit, and the output terminal is connected to the instrumentation amplifier circuit for first-stage amplification gain adjustment; as the center of the data processor
  • a processing unit which is provided with a temperature compensation unit and a time distance calculation unit.
  • Both the housing 1 and the probe 31 are made of acid and alkali resistant material; a fixing bracket 115 is provided in the housing 1, and the fixing bracket 115 is composed of two semi-ellipsoid plastic parts, and plastic can be used. It can also be other insulating materials, such as rubber products, other high-molecular polymers, etc., a bayonet is provided on the inner wall of the semi-ellipsoidal plastic part to fix the circuit part 2 to prevent vibration and shielding
  • the circuit part 2 includes a circuit board 21 and an ultrasonic transducer unit 22, a power conversion module, an ultrasonic drive circuit, an instrument amplifier circuit, a filter amplifier circuit, a gain adjustment module, a central processing unit, and a key control unit
  • the temperature filter circuit, the display drive unit, the display unit, the output unit, and the output protection unit are all arranged on the circuit board 21;
  • the ultrasonic transducer unit includes a signal receiving and transmitting unit and a temperature detecting unit, and the central processing unit can optionally use
  • the ultrasonic transducer unit is made of a corrosion-resistant plastic material; the ultrasonic transducer unit 22 is arranged inside the probe 3, the housing 1 and the probe 3 are fixed by interference fit, and the circuit part 2 is provided inside the casing 1.
  • the key control unit is composed of key 113. Key 113 is used for menu setting and function selection.
  • the display unit is composed of three seven-segment digital tubes and six LED lights. Three seven-segment digital tubes are used for temperature display, distance display of target objects, and The current current value or voltage value is displayed. Six LED lights are displayed as status lights.
  • the display unit is set in the display cover 112.
  • the circuit part also includes an output unit and an output protection unit.
  • the input end of the output unit is connected to the central processing circuit, and the switching value output of the monitoring distance signal is performed by an NPN transistor or a PNP transistor.
  • the current is 4-20mA or the voltage is 0-10V.
  • the analog output of the monitoring distance signal is performed; the input end of the output protection unit is connected to the output unit to achieve short circuit protection, reverse polarity protection, overload protection, etc.
  • the circuit part further includes a display driving unit and a display unit, an input end of which is connected to the central processing unit, and an output end of which is connected to the display unit for display signal output; the ultrasonic transducer unit collects the temperature of the measured environment, respectively The signal and the distance signal are transmitted to the central processing unit, and the processed data are output through the output unit and the display unit displays a numerical signal, respectively.
  • the circuit part further includes a key control unit.
  • the key control unit and the display unit constitute a menu system for user interaction through a central processing unit.
  • the menu system can control the output mode and switch point of the digital output, and the analog output.
  • the output method, high and low points, and ultrasonic sound speed learning and factory settings can be adjusted or corrected; at the same time, the current distance, temperature, or current and voltage can be displayed through the key control unit settings.
  • the circuit works as follows:
  • the temperature detection unit is used to detect the temperature signal of the measured medium. After processing by the filter circuit, the detected temperature signal is transmitted to the central processing unit; the central processing unit outputs signals and inputs the ultrasonic drive circuit, and at the same time, the central processing unit starts timing and the ultrasonic drive
  • the circuit is connected to the ultrasonic transducer for ultrasonic transmission; the ultrasonic transducer detects the ultrasonic signal returned after reaching the target, converts it into an electrical signal and outputs it to the instrumentation amplifier circuit for first-stage amplification; the instrumentation amplifier circuit is connected to the filter amplifier circuit for After the secondary filtering and amplification, the detected signal is transmitted to a single central processing unit; at the same time, the central processing unit stops timing and starts time and distance calculation and internal temperature drift compensation; the gain adjustment module, the output end is connected to the instrument amplification circuit, and the input end is connected The central processing unit adjusts the first-stage amplification gain within a precise time to achieve the automatic gain effect; at the same time, the central processing unit output
  • the code tube and LED lights display the temperature signal and the distance signal of the target; the key control unit can calibrate the ultrasonic sound velocity, and can also be used to select the output mode, output high and low points, switch points and other menu settings and function selection;
  • the power conversion module is mainly used to provide the required voltage to each unit; the anti-interference module is used to prevent electromagnetic static electricity and other interference to improve the stability and reliability of the product.
  • the anti-interference module is mainly composed of one or two anti-interference components, and then some techniques for enhancing anti-interference are adopted in the circuit layout.
  • the anti-interference module except for the aforementioned metal case, plastic parts, and ground wire, is mainly implemented by magnetic beads and common mode chokes on the circuit.
  • a common mode choke is provided at the input end of the power conversion module to suppress common mode interference signals in the circuit; at the same time, a magnetic bead is connected in parallel behind the choke to eliminate the circuit High-frequency interference signals; at the same time, the power conversion module is connected to the casing and connected to the ground to release excess charges and interference inside the circuit, thereby enhancing the anti-interference performance of the product.
  • the central processing unit generates a monitoring signal to the output unit.
  • the output type of the monitoring signal is a switch output
  • the switch output of the monitoring distance signal is performed through an NPN transistor or a PNP transistor; when the output type of the monitoring signal is analog
  • the analog distance output of the monitoring distance signal is performed by current 4-20mA or voltage 0-10V; according to the output mode, it is divided into two-wire system and three-wire system output.
  • the output unit has its input connected to the central processing unit and its output connected to the other input of the output protection unit.
  • the output protection unit can implement various protection functions such as short circuit protection, reverse polarity protection, and overload protection through pure hardware.
  • the housing 1 adopts a structure in which the upper cover 11 and the probe 31 are combined, which is convenient to manufacture and install.
  • the overall height of the housing and the probe after assembly is not higher than 82.5mm, and the upper end of the probe 31 is Connected to the upper cover 11, the ultrasonic transducer unit is installed at the lower end of the probe 31, and the probe 31 plays a role of fixing and locking during installation.
  • the upper cover 11 is provided with a display cover 112, a button 113, and a connector 114.
  • a distance display unit is provided in the display cover 112.
  • the display cover 112 is fixed to the inner surface of the upper cover from the inside of the cover through the pressing piece 111. , Used to display the current target distance, temperature, and current or voltage value display and status display; key 113 is loaded from the surface of the upper cover to learn menu settings such as calibration target distance high and low points, switch point selection, etc.
  • the connector 114 is provided with a sealing ring, which extends into the shell from the round hole on the side of the upper cover 11; the connector 114 is used to connect an external cable to supply power to the circuit part; a plastic piece 115 is used to fix the circuit part 2 , Play the role of anti-vibration, insulation, anti-interference.
  • the probe 31 is provided with two card slots, a seal ring 311 is provided on the upper card slot, and a seal pad 312 is provided on the lower card slot.
  • the seal ring 311 and the seal pad 312 have the effect of waterproof and dustproof.
  • the double-slot design greatly improves the sealing performance, plays a role of waterproof, moisture-proof and dust-proof, and also easily improves the explosion-proof level.
  • the probe is provided with a blind hole in the center of the cylinder, and a step is provided at the top, middle and bottom of the blind hole.
  • the top step is provided with the fixed bracket, the middle step is provided with the pressure ring, and the bottom
  • the ultrasonic transducer unit is placed on a step, and the pressure ring is used to fix the ultrasonic transducer unit.
  • the probe 31 includes a pressure ring 313, a seal ring 314, a transducer gasket 315, and an ultrasonic transducer unit 316.
  • the transducer gasket 315 wraps the ultrasonic transducer unit 316.
  • the transducer gasket 315 can reduce the probe 31
  • the sealing ring 314 acts as a seal when the interference fit between the pressure ring 313, the ultrasonic transducer unit 316 and the probe 31; a round hole is provided on the top of the pressure ring 313, so A ground wire for enhancing the anti-interference ability of the product is installed in the circular hole, and the diameter of the circular hole is ⁇ 1.5mm.
  • Both the upper cover 11 and the probe 31 are made of a corrosion-resistant material.
  • the upper cover 11 and the probe 31 are fixed by an interference fit, and sealed by a sealing ring 311 and a gasket 312 on the probe 31.
  • a menu is displayed for the present invention.
  • the first column is the setting menu
  • the second column is the menu function note
  • the third column is the parameter setting range
  • the fourth column is the setting method
  • the fifth column is a note describing the menu object.
  • the left MODE / ENTER key is the menu setting and confirmation function. Each time the menu is pressed, it is displayed on the digital tube.
  • the right LEARN / SET key is the parameter setting. With the MODE / ENTER key, set the parameters of the corresponding menu (also shown on the digital tube), confirm the parameters and press the MODE / ENTER key again.
  • ASP and "AEP” switch points After setting ASP and AEP, when the distance changes from ASP to AEP, the analog output changes from 20mA to 4mA or 10V to 0V.
  • N-P output 1 mode In the menu “n-P” mode, you can set whether the output 1 mode is “PnP” or "nPn”.
  • “Mor” advanced setting access password This menu will only appear in the menu when the power is pressed after pressing the MODE / ENTER key. When the password is entered correctly, the menu will automatically join the various menus of the advanced settings. When the password is entered incorrectly, The menu is locked. When the menu is unlocked again, the menu will disappear.
  • IH current high point setting In “iH” mode, adjust the detection distance to the maximum current output, and then adjust the parameter to make the current parameter infinitely close to 20mA to reduce the output error.
  • VH current high point setting: In “vH” mode, adjust the detection distance to the maximum voltage output, and then adjust the parameter to make the current parameter infinitely close to 10V to reduce the output error.
  • the present invention provides an intelligent ultrasonic level sensor with high reliability, accurate detection accuracy, not affected by temperature, strong anti-interference ability, sound speed learning function, which can be realized by button learning;
  • the seal fits with a non-glue sealing structure, and the protection level can reach IP68 protection.
  • the shell is made of acid and alkali resistant materials, which is corrosion-resistant and durable. The structure is simple, the installation and maintenance are convenient, the volume is small, and the shape is beautiful. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

L'invention concerne un capteur ultrasonore intelligent de niveau de matière, comprenant un couvercle supérieur (11), un boîtier (1), une sonde (31) et une partie de circuit (2), un support fixe (115) étant disposé dans le boîtier (1) et le support fixe (115) étant utilisé pour installer la partie de circuit (2) ; la partie de circuit (2) est disposée dans le boîtier (1) et la partie de circuit (2) comprend un module de conversion de puissance, une unité de transducteur ultrasonore (22), un circuit d'attaque ultrasonore, un circuit d'amplification d'instrumentation, un circuit de filtrage et d'amplification, un module de réglage de gain, une unité centrale de traitement et un circuit de filtrage de température ; l'unité de transducteur ultrasonore (22) comprend une unité de réception et d'émission de signal et une unité de détection de température, et l'unité de transducteur ultrasonore (22) est disposée dans une partie interne de la sonde (31). Le présent capteur est hautement fiable et possède une exactitude de détection précise, ne sera pas affecté par la température et possède de fortes capacités anti-interférences ; et un apprentissage de la vitesse du son peut être réalisé au moyen d'un mode d'apprentissage clé.
PCT/CN2019/091043 2018-09-28 2019-06-13 Capteur ultrasonore intelligent de niveau de matière WO2020062934A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201811142695.1A CN108871503A (zh) 2018-09-28 2018-09-28 一种智能型超声波料位传感器
CN201821593525.0U CN208998894U (zh) 2018-09-28 2018-09-28 一种智能型超声波料位传感器
CN201811142695.1 2018-09-29
CN201821593525.0 2018-09-29

Publications (1)

Publication Number Publication Date
WO2020062934A1 true WO2020062934A1 (fr) 2020-04-02

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Application Number Title Priority Date Filing Date
PCT/CN2019/091043 WO2020062934A1 (fr) 2018-09-28 2019-06-13 Capteur ultrasonore intelligent de niveau de matière

Country Status (2)

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DE (1) DE202019106470U1 (fr)
WO (1) WO2020062934A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112946067A (zh) * 2021-02-05 2021-06-11 内蒙古科技大学 超声波矿浆浓度在线检测仪和智能控制终端
CN113340516A (zh) * 2021-06-07 2021-09-03 中国工程物理研究院总体工程研究所 压力测量单元

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US4221004A (en) * 1978-08-03 1980-09-02 Robertshaw Controls Company Adjustable ultrasonic level measurement device
US5163323A (en) * 1990-01-18 1992-11-17 Ezra C. Lundahl, Inc. Ultrasonic distance measuring instrument
US5768939A (en) * 1996-06-10 1998-06-23 Kistler-Morse Corporation Method and apparatus for acoustic level measurements
CN105784071A (zh) * 2016-04-26 2016-07-20 江苏省电力公司常州供电公司 变压器油枕油位超声波探测仪
CN205940708U (zh) * 2016-08-09 2017-02-08 北京雨根科技有限公司 一种超声波物位传感器
CN106404128A (zh) * 2016-11-28 2017-02-15 中环天仪股份有限公司 一种高精度超声波物位计及测量方法
CN206269859U (zh) * 2016-10-25 2017-06-20 伊玛精密电子（苏州）有限公司 一种耐腐蚀智能型分离式传感器
CN108871503A (zh) * 2018-09-28 2018-11-23 伊玛精密电子（苏州）有限公司 一种智能型超声波料位传感器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4221004A (en) * 1978-08-03 1980-09-02 Robertshaw Controls Company Adjustable ultrasonic level measurement device
US5163323A (en) * 1990-01-18 1992-11-17 Ezra C. Lundahl, Inc. Ultrasonic distance measuring instrument
US5768939A (en) * 1996-06-10 1998-06-23 Kistler-Morse Corporation Method and apparatus for acoustic level measurements
CN105784071A (zh) * 2016-04-26 2016-07-20 江苏省电力公司常州供电公司 变压器油枕油位超声波探测仪
CN205940708U (zh) * 2016-08-09 2017-02-08 北京雨根科技有限公司 一种超声波物位传感器
CN206269859U (zh) * 2016-10-25 2017-06-20 伊玛精密电子（苏州）有限公司 一种耐腐蚀智能型分离式传感器
CN106404128A (zh) * 2016-11-28 2017-02-15 中环天仪股份有限公司 一种高精度超声波物位计及测量方法
CN108871503A (zh) * 2018-09-28 2018-11-23 伊玛精密电子（苏州）有限公司 一种智能型超声波料位传感器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112946067A (zh) * 2021-02-05 2021-06-11 内蒙古科技大学 超声波矿浆浓度在线检测仪和智能控制终端
CN113340516A (zh) * 2021-06-07 2021-09-03 中国工程物理研究院总体工程研究所 压力测量单元
CN113340516B (zh) * 2021-06-07 2023-03-17 中国工程物理研究院总体工程研究所 压力测量单元

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