CN206002171U - A kind of Ultrasonic Level Transmitter - Google Patents
A kind of Ultrasonic Level Transmitter Download PDFInfo
- Publication number
- CN206002171U CN206002171U CN201620792901.3U CN201620792901U CN206002171U CN 206002171 U CN206002171 U CN 206002171U CN 201620792901 U CN201620792901 U CN 201620792901U CN 206002171 U CN206002171 U CN 206002171U
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- piezoelectric transducer
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
A kind of Ultrasonic Level Transmitter, it is characterized in that transmitter for integral type structure, power supply is output as the two-wire system form of the same circuit with current signal, it is sealed in single housing by electronic unit and PZT (piezoelectric transducer) and constitutes, electronic unit includes voltage conversion, single-chip microcomputer, transducer drive, echo signal reception, Bluetooth communication and DC4～20mA current output circuit, and PZT (piezoelectric transducer) is the single transducer of transmitting-receiving unification.Temperature sensor is packaged with housing.Possess the Ultrasonic Level Transmitter of said structure, compact, parameter setting is carried out using bluetooth approach, convenient, flexible.
Description
Technical field
The utility model is related to a kind of Ultrasonic Level Transmitter, belongs to level gauging technical field.
Background technology
Ultrasonic material level meter is the instrument using the height of materials in sound wave principle of reflection measurement container, can measure and show
Show thing place value (liquid level or material position), output signal teletransmission to master control room host computer.Ultrasonic material level meter is by electronic unit and piezoelectricity
The housing of transducer and outside is constituted, and is divided into integral type and split type two class, and the chlamydate PZT (piezoelectric transducer) of encapsulation is also called super
Sonic sensor.It is referred to as Integral ultrasonic level meter, electronics when electronic unit forms integral structure with PZT (piezoelectric transducer)
Unit is in enclosure interior, and lower housing portion combination has PZT (piezoelectric transducer)；When electronic unit and each self-forming independence of PZT (piezoelectric transducer)
Structure when be referred to as Split ultrasonic level meter, therebetween by outside cable be connected.Fig. 1 is known integral type
The composition structure chart of ultrasonic material level meter, Fig. 2 are the composition structure chart of known Split ultrasonic level meter.Electronic unit by
The module compositions such as single-chip microcomputer, transducer drive, echo reception, display, button, signal teletransmission, Single-chip Controlling ultrasonic wave are believed
Number transmitter module periodically drives PZT (piezoelectric transducer), and processes the echo-signal that echo reception module is identified, calculates survey
Amount data.Ultrasonic material level meter is installed on upper vessel portion, and under the control of electronic unit, PZT (piezoelectric transducer) is launched to testee
A branch of ultrasonic pulse.Sound wave is reflected by body surface, and part reflection echo is received and converted to electric signal by PZT (piezoelectric transducer).
It is transmitted into from ultrasonic wave and is received again, its time is directly proportional to the distance of PZT (piezoelectric transducer) to testee.Electronic unit
The time is detected, and tested distance is calculated according to the known velocity of sound.Thing place value can be drawn by subtraction.Measurement result
By LCD liquid crystal display, and master control room is uploaded to, master control room controls other equipment to carry out accordingly according to the height of thing place value
Operation, realizes automatically controlling production process.
Existing ultrasonic material level meter, either integral type or split-type structural, are required to pass through when which is installed and used
Its button for providing and display arranging some installation parameters so that level meter being capable of normal work.Ultrasonic material level meter is first
First measured is the distance to body surface, and thing place value (liquid level or material position) be by setting height(from bottom) (from PZT (piezoelectric transducer) surface
Distance to container bottom) deduct what range finding was worth to, therefore setting height(from bottom) must be set in level meter, while the electricity of teletransmission
The other specifications such as stream signal full scale, zero point also need to set.Ultrasonic material level meter must provide for button and display part, for user
Necessary parameter is set.So that the ultrasonic material level meter structure for possessing apparatus above is more complicated, volume is larger, manufacturing cost also phase
To larger.
Utility model content
The utility model proposes to the not enough solution of above-mentioned ultrasonic material level meter, that is, designing a kind of ultrasonic level
Transmitter, the button in electronic unit and display part are removed, so as to compress the volume of whole electronic unit, and by electronics
Unit is integrated on a less housing with PZT (piezoelectric transducer), forms the integral type level transmitter of a two-wire system, and which leads to
The outside teletransmission DC4～20mA current signal of 2 core cables is crossed, and by externally fed on the same circuit, in loop below 4mA part
Work for transmitter internal circuit, 4mA above section is exported as Remote signal.Compact bluetooth mould is designed with electronic unit
Block, for receiving and dispatching bluetooth electromagnetic signal, user can be become come arranging thing position by the handheld device such as mobile phone for possessing Bluetooth communication
The installation parameter required for device is sent, and can be in the measurement data for reading transmitter in the certain scope of transmitter and internal ginseng
Number, need not be directly adjacent to transmitter, facilitate commissioning device.Bluetooth module adopts active sleep mode, wakes up every some cycles
Once, transmitter power consumption so can effectively be reduced.Externally fed is converted to each circuit in electronic unit by voltage conversion circuit
Required operating voltage, SCM system control PZT (piezoelectric transducer) drive circuit periodic duty, and echo signal reception circuit connects
Receiving PZT (piezoelectric transducer) echo-signal and triggering SCM system carries out data processing, SCM system collecting temperature sensor signal
And control the signal output of DC4～20mA current output circuit, Single-chip Controlling bluetooth communication communication with the outside world.
Therefore, this transmitter is integral type structure, and power supply is output as the two-wire system form of the same circuit with current signal, by
Electronic unit and PZT (piezoelectric transducer) are sealed in single housing and constitute, and electronic unit includes voltage conversion, SCM system, pressure
Electric transducer driving, echo signal reception, Bluetooth communication and DC4～20mA current output circuit, PZT (piezoelectric transducer) are closed for transmitting-receiving
One single transducer.
Due to velocity of sound temperature influence, it is to improve accuracy of measurement, housing planted agent is packaged with temperature sensor.
2 core cables are led to from inside to outside from housing, for signal transmission being carried out with the external world, and power into transmitter.
As electronic unit eliminates button and display, and then the shell for being originally used for laying electronic unit is eliminated,
So cost is reduce further, product price is reduced, saved user cost.Due to providing Bluetooth communication so that ginseng
Several settings is convenient flexibly.
Description of the drawings
Below in conjunction with the accompanying drawings the utility model is described in further detail.
Fig. 1 is the composition structural representation of known Integral ultrasonic level meter.
Fig. 2 is the composition structural representation of known Split ultrasonic level meter.
Fig. 3 is the utility model Ultrasonic Level Transmitter specific embodiment composition structural representation.
Fig. 4 is the utility model Ultrasonic Level Transmitter specific embodiment functional block diagram.
Specific embodiment
Set forth herein 1 preferred specific embodiment (infinite), specifically details are as follows.
Below in conjunction with description of the drawings specific embodiment of the present utility model.
As shown in figure 3, whole Ultrasonic Level Transmitter is structure as a whole, electronic unit and PZT (piezoelectric transducer) are encapsulated in
In one closed plastic casing, and 2 core cables are outwards drawn, for power supply and signal teletransmission.PZT (piezoelectric transducer) is for receiving
The single transducer of unification is sent out, resonant frequency is 50KHZ, 8 meters of range.Metal screen layer is placed with the inner side of sensor housing,
For shielding extraneous possible electromagnetic interference.Electronic unit has following circuit function module：Power convert, single-chip microcomputer system
System, transducer drive, echo reception, Bluetooth circuit module and signal output apparatus module etc., can drive PZT (piezoelectric transducer) to
Emission ultrasonic wave simultaneously receives reflection echo, completes level gauging, and remote transfer signal is to host computer；Bluetooth electricity in electronic unit
The handheld device such as mobile phone that road module is used for possessing function of Bluetooth communication with outside carries out real-time Communication for Power, by handheld device to becoming
Send device that parameter setting is carried out, while measurement data can be checked, read and change the inner parameter of transmitter.
Fig. 4 is the utility model Ultrasonic Level Transmitter functional block diagram.Transmitter by externally fed, usually DC24v,
Externally fed enters transmitter by 2 core cables, through secondary filter, is converted to each circuit institute in electronic unit by voltage conversion circuit
The operating voltages such as+the 3.3v for needing and -3.3v, and generate the 800v high-voltage pulse that can drive PZT (piezoelectric transducer)；Single-chip microcomputer is adopted
The MSP430F148 chip of super low-power consumption, Single-chip Controlling transducer driving circuit periodically drive PZT (piezoelectric transducer), piezoelectricity
Transducer is received and converted to faint electric signal, echo-signal to emission ultrasonic wave, the echo of reflection by PZT (piezoelectric transducer)
This signal is filtered amplifying by receiving circuit, and the echo-signal triggering single-chip microcomputer of amplification carries out data processing, completes distance and surveys
Amount, according to the internal setting height(from bottom) value for arranging, is conversed thing place value, and believes corresponding DC4～20mA electric current by D/A conversion
Number pass through the outside teletransmission of 2 core cables.The chip for realizing Bluetooth function selects DA14580, and its receiving sensitivity is high, and transmitting power consumption is relatively
Low, disclosure satisfy that the low-power consumption of this transmitter is required.Single-chip Controlling bluetooth communication is waken up once per 100ms, bluetooth mould
Block is searched after waking up and has or not extraneous signal of communication, if any then handshake communication, carries out data exchange with handheld device.As nothing is extraneous logical
Letter signal, bluetooth module dormancy again, to reduce system power dissipation.
Single-chip microcomputer computation and measurement apart from when to use the velocity of sound, as the velocity of sound is influenced by ambient temperature, be placed with housing
The temperature sensor STLM20W87F of super low-power consumption, for measuring environment temperature, to revise the velocity of sound, it is ensured that the survey of distance and thing position
Accuracy of measurement.
Claims (1)
1. a kind of Ultrasonic Level Transmitter, is characterized in that transmitter for integral type structure, and power supply is output as same with current signal
The two-wire system form of primary Ioops, is sealed in single housing by electronic unit and PZT (piezoelectric transducer) and constitutes, and electronic unit includes
Voltage conversion, SCM system, PZT (piezoelectric transducer) driving, echo signal reception, Bluetooth communication and DC4～20mA electric current output electricity
Road, PZT (piezoelectric transducer) are the single transducer of transmitting-receiving unification, be packaged with temperature sensor, draw from housing from inside to outside in transmitter enclosure body
Go out to have 2 core cables, externally fed is converted to voltage conversion circuit the operating voltage in electronic unit needed for each circuit, single-chip microcomputer
System controls PZT (piezoelectric transducer) drive circuit periodic duty, and echo signal reception circuit receives PZT (piezoelectric transducer) echo-signal simultaneously
Triggering SCM system carries out data processing, and SCM system collecting temperature sensor signal simultaneously controls DC4～20mA electric current defeated
Go out the signal output of circuit, Single-chip Controlling bluetooth communication communication with the outside world.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620792901.3U CN206002171U (en) | 2016-07-18 | 2016-07-18 | A kind of Ultrasonic Level Transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620792901.3U CN206002171U (en) | 2016-07-18 | 2016-07-18 | A kind of Ultrasonic Level Transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206002171U true CN206002171U (en) | 2017-03-08 |
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ID=58201137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620792901.3U Active CN206002171U (en) | 2016-07-18 | 2016-07-18 | A kind of Ultrasonic Level Transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206002171U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871503A (en) * | 2018-09-28 | 2018-11-23 | 伊玛精密电子（苏州）有限公司 | A kind of Intelligent supersonic level sensor |
| CN110954187A (en) * | 2019-12-17 | 2020-04-03 | 江帆 | Reflective magnetic isolation level instrument |
-
2016
- 2016-07-18 CN CN201620792901.3U patent/CN206002171U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871503A (en) * | 2018-09-28 | 2018-11-23 | 伊玛精密电子（苏州）有限公司 | A kind of Intelligent supersonic level sensor |
| CN110954187A (en) * | 2019-12-17 | 2020-04-03 | 江帆 | Reflective magnetic isolation level instrument |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |