CN211552993U - Two-wire system ultrasonic level meter - Google Patents
Two-wire system ultrasonic level meter Download PDFInfo
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- CN211552993U CN211552993U CN202020142207.3U CN202020142207U CN211552993U CN 211552993 U CN211552993 U CN 211552993U CN 202020142207 U CN202020142207 U CN 202020142207U CN 211552993 U CN211552993 U CN 211552993U
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Abstract
The utility model discloses a two-wire system ultrasonic wave level meter, including 4-20ma signal output circuit, HART communication circuit, host processor, power amplifier circuit, ultrasonic sensor, band-pass filter circuit, diode envelope detection circuit, signal amplifier circuit, analog-to-digital conversion circuit, hardware watchdog circuit, button input circuit, 12864 liquid crystal chinese display circuit, the utility model discloses a two-wire system current loop interface is researched and developed on the power consumption of ultralow merit to realize the HART communication on the current loop, solve the inconvenient problem of field installation.
Description
Technical Field
The utility model relates to a two-wire system ultrasonic wave level meter.
Background
The sensor of the traditional ultrasonic level meter on the market is of an energy driving type, so that the power consumption of the whole machine is inevitably increased, most of the power supply is 220VAC, the inconvenience is brought to field use, and 24V power distribution output and 4-20mA feedback input two-wire system interfaces are reserved on a plurality of fields.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects in the prior product and providing a two-wire system ultrasonic level meter.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
a two-wire system ultrasonic level meter comprises a 4-20ma signal output circuit, an HART communication circuit, a main processor, a power amplification circuit, an ultrasonic sensor, a band-pass filter circuit, a diode envelope detection circuit, a signal amplification circuit, an analog-to-digital conversion circuit, a hardware watchdog circuit, a key input circuit and a 12864 liquid crystal Chinese display circuit, wherein the 4-20ma signal output circuit, the HART communication circuit, the power amplification circuit, the analog-to-digital conversion circuit, the hardware watchdog circuit, the key input circuit and the 12864 liquid crystal Chinese display circuit are all connected with the main processor, the power amplification circuit is connected with the band-pass filter circuit through the ultrasonic sensor, the band-pass filter circuit is connected with the signal amplification circuit through the diode envelope detection circuit, and the signal amplification circuit is connected with the analog-to-digital conversion circuit.
Preferably, the power amplification circuit is used to boost the voltage to AC 300V.
Preferably, the band-pass filter circuit is configured to filter, frequency-select and amplify the weak echo signal received by the ultrasonic sensor.
Preferably, the diode envelope detection circuit is arranged to envelope the echo signal into a pulse signal.
Preferably, the signal amplification circuit is configured to amplify a signal.
Preferably, the analog-to-digital conversion circuit is used to convert an analog signal into a digital signal.
Preferably, the 12864 liquid crystal Chinese display circuit is used for displaying ultrasonic echoes, real-time filling levels and menus.
The utility model has the advantages as follows: the utility model discloses a establish two-wire system ultrasonic wave level meter that develops on the ultralow power consumption circuit to superpose the HART communication on exporting 4-20mA signal, solve the inconvenient problem of on-the-spot installation.
Drawings
Fig. 1 is a module connection diagram of the present invention.
Detailed Description
The technical scheme of the utility model is further explained by combining the attached drawings of the specification:
as shown in fig. 1, a two-wire system ultrasonic level meter comprises a 4-20ma signal output circuit 1, a HART communication circuit 2, a main processor 3, a power amplification circuit 4, an ultrasonic sensor 5, a band-pass filter circuit 6, a diode envelope detection circuit 7, a signal amplification circuit 8, an analog-to-digital conversion circuit 9, a hardware watchdog circuit 10, a key input circuit 11, and a 12864 liquid crystal Chinese display circuit 12, wherein the 4-20ma signal output circuit 1, the HART communication circuit 2, the power amplification circuit 4, the analog-to-digital conversion circuit 9, the hardware watchdog circuit 10, the key input circuit 11, and the 12864 liquid crystal Chinese display circuit 12 are all connected with the main processor 3, the power amplification circuit 4 is connected with the band-pass filter circuit 6 through the ultrasonic sensor 5, the band-pass filter circuit 6 is connected with the signal amplification circuit 8 through the diode envelope detection circuit 7, the signal amplifying circuit 8 is connected with an analog-to-digital conversion circuit 9.
As shown in fig. 1, the power amplifying circuit 4 is configured to boost a voltage to AC300V, the band-pass filtering circuit 6 is configured to filter and amplify a weak echo signal received by the ultrasonic sensor, the diode envelope detection circuit 7 is configured to envelope the echo signal into a pulse signal, the signal amplifying circuit 8 is configured to amplify the signal, the analog-to-digital conversion circuit 9 is configured to convert an analog signal into a digital signal, and the 12864 liquid crystal chinese display circuit 12 is configured to display an ultrasonic echo, a real-time level, and a menu. The HART communication circuit can remotely set engineering parameters by using a HART manual operator.
The utility model discloses a establish two-wire system current loop interface that develops on the ultralow power consumption circuit to realize the HART communication on the current loop, solve the inconvenient problem of on-the-spot installation.
It should be noted that the above list is only one specific embodiment of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications can be made, and in short, all modifications that can be directly derived or suggested by the person skilled in the art from the disclosure of the present invention should be considered as the protection scope of the present invention.
Claims (7)
1. A two-wire system ultrasonic level meter is characterized by comprising a 4-20ma signal output circuit (1), a HART communication circuit (2), a main processor (3), a power amplification circuit (4), an ultrasonic sensor (5), a band-pass filter circuit (6), a diode envelope detection circuit (7), a signal amplification circuit (8), an analog-to-digital conversion circuit (9), a hardware watchdog circuit (10), a key input circuit (11) and a 12864 liquid crystal Chinese display circuit (12), wherein the 4-20ma signal output circuit (1), the HART communication circuit (2), the power amplification circuit (4), the analog-to-digital conversion circuit (9), the hardware watchdog circuit (10), the key input circuit (11) and the 12864 liquid crystal Chinese display circuit (12) are all connected with the main processor (3), the power amplification circuit (4) is connected with the band-pass filter circuit (6) through the ultrasonic sensor (5), the band-pass filter circuit (6) is connected with the signal amplification circuit (8) through the diode envelope detection circuit (7), and the signal amplification circuit (8) is connected with the analog-to-digital conversion circuit (9).
2. The two-wire ultrasonic level gauge according to claim 1, wherein said power amplification circuit (4) is adapted to boost the voltage to AC 300V.
3. The two-wire ultrasonic level gauge according to claim 1, wherein said band-pass filter circuit (6) is adapted to filter and frequency-selectively amplify the weak echo signals received by the ultrasonic sensor.
4. The two-wire ultrasonic level gauge according to claim 1, wherein said diode envelope detection circuit (7) is adapted to envelope the echo signal into a pulsed signal.
5. The two-wire ultrasonic level gauge according to claim 1, wherein said signal amplification circuit (8) is adapted to amplify a signal.
6. The two-wire ultrasonic level gauge according to claim 1, wherein said analog-to-digital conversion circuit (9) is adapted to convert an analog signal into a digital signal.
7. The two-wire ultrasonic level gauge according to claim 1, wherein said 12864 liquid crystal Chinese display circuit (12) is used for displaying ultrasonic echo, real-time level, menu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020142207.3U CN211552993U (en) | 2020-01-22 | 2020-01-22 | Two-wire system ultrasonic level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020142207.3U CN211552993U (en) | 2020-01-22 | 2020-01-22 | Two-wire system ultrasonic level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211552993U true CN211552993U (en) | 2020-09-22 |
Family
ID=72493725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020142207.3U Active CN211552993U (en) | 2020-01-22 | 2020-01-22 | Two-wire system ultrasonic level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211552993U (en) |
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2020
- 2020-01-22 CN CN202020142207.3U patent/CN211552993U/en active Active
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