CN109798953A - A kind of digitlization outer patch ultrasonic liquid level switch measuring system and its measurement method - Google Patents
A kind of digitlization outer patch ultrasonic liquid level switch measuring system and its measurement method Download PDFInfo
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- CN109798953A CN109798953A CN201910215506.7A CN201910215506A CN109798953A CN 109798953 A CN109798953 A CN 109798953A CN 201910215506 A CN201910215506 A CN 201910215506A CN 109798953 A CN109798953 A CN 109798953A
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Abstract
A kind of digitlization outer patch ultrasonic liquid level switch measuring system and its measurement method, it is communicated between hand-held set 1 and secondary instrument by being wirelessly connected, it can also be communicated simultaneously by RS485 bus between hand-held set and digitlization probe, digitlization probe B, digitlization probe A 4, digitlization probe B are located on storage tank.1) it is connected using hand-held set with mounted digitlization probe, reads and store test curve, and judge automatically installation results；2) digitlization probe periodically to the ultrasonic wave of storage tank transmitting certain frequency and acquires echo-signal；3) Characteristic Extraction, operation and amendment are carried out to collected echo-signal；4) test result and setting thresholding are compared, thinks that liquid level state changes when test value is greater than thresholding, otherwise it is assumed that unchanged；5) acquisition data and test result are transmitted to secondary instrument by digitlization probe, and data are saved and export result by secondary instrument.Installation process is simplified, stability is improved, facilitates the debugging and use of user.
Description
Technical field
The invention belongs to liquid level monitoring technical fields, are related to the monitoring measurement of storage tank contact-free level, and in particular to a kind of
Digitize outer patch ultrasonic liquid level switch measuring system and its measurement method.
Background technique
In the liquid level Engineering Control of the industries such as medicine, petroleum, chemical industry, electric power, food, it is necessary to the liquid level in storage tank into
Row monitoring, when the liquid level in storage tank reaches upper limit and lower limit, liquid level warning equipment needs to provide this warning.Current
Existing supersonic liquid level warning device is broadly divided into external labeling type and two kinds of plug-in type, needs to stop production when plug-in type is installed and be opened
Hole welding, this have requirement of explosion proof or for it is toxic, be corrosive liquid off-limit alarm when be less suitable for.And external labeling type liquid level
Switch generally uses multi-probe measurement method, and installation process is more complicated, heavy workload, and substantially using sensor and place
The separated mode of device is managed, the analog signal for causing sensor to receive is on the transmit path vulnerable to interference.Simultaneously because test
As a result related with liquid component in the material of each container, wall thickness, container and temperature, and by location for paste couplant and ring
The influence of border temperature leads to the stability and poor reliability of test result.And in later maintenance due to lacking initial data
Support, cannot find and solve the problems, such as in time, cause maintenance efficiency low, maintenance cost is high.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a kind of digitlization outer patch supersonic liquid levels
Switch measuring system and its measurement method solve and install complicated, heavy workload using external labeling type liquid-level switch at present, vulnerable to dry
It disturbs, test result stability and poor reliability, the low problem of maintenance efficiency.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of digitlization outer patch ultrasonic liquid level switch measuring system and its measurement method, including hand-held set, secondary instrument and number
Change probe, communicated between secondary instrument and digitlization probe A, digitlization probe B by RS485 bus, hand-held set 1 with it is secondary
It is communicated between table by being wirelessly connected, while can also be passed through between hand-held set and digitlization probe, digitlization probe B
RS485 bus is communicated, and digitlization probe A 4, digitlization probe B are located on storage tank.
The digitlization probe is made of power module, main control module, transmitting module, receiving module and RS485 module,
Power module connection main control module, receiving module, ultrasound involve temperature sensor, RS485 module, and main control module connects RS485
Module, main control module and transmitting module, transmitting module connection ultrasound involve temperature sensor, and receiving module connection ultrasound involves temperature
Spend sensor.
The secondary instrument is deposited by antisurge module, power module, main control module, Wi-Fi module, RS485 module, SD card
Module, display and on & off switch, analog or digital interface composition are stored up, antisurge module connects power module, power module connection
Main control module, Wi-Fi module, RS485 module, SD card memory module, display and on & off switch, main control module connect Wi-Fi mould
Block, RS485 module, SD card memory module, display and on & off switch and analog or digital interface.
The antisurge module ability to bear is 6kV, and SD card memory module can store up to 40 day datas, Wi-Fi
Module maximum communication distance is 3 meters.
The secondary instrument can be attached and be communicated with up to four digitlization probes simultaneously by RS485 module.
The hand-held set is by power module, main control module, Wi-Fi module, RS485 module, display and keyboard, SD card
Memory module composition, power module connect main control module, Wi-Fi module, RS485 module and SD card memory module, main control module
Connect Wi-Fi module, RS485 module, display and keyboard and SD card memory module.
The hand-held set can carry out installation detection, data storage and software liter by the total demand pairs wordization probe of RS485
Grade.
The hand-held set can carry out parameter setting, reading data and software upgrading to secondary instrument by Wi-Fi.
A kind of digitlization outer patch ultrasonic liquid level switch measurement method, comprising the following steps:
1) it is connected using hand-held set with mounted digitlization probe, reads and store test curve, and judges automatically installation knot
Fruit；
2) digitlization probe periodically to the ultrasonic wave of storage tank transmitting certain frequency and acquires echo-signal；
3) Characteristic Extraction, operation and amendment are carried out to collected echo-signal；
4) test result and setting thresholding are compared, thinks that liquid level state changes when test value is greater than thresholding, otherwise recognizes
It is unchanged；
5) acquisition data and test result are transmitted to secondary instrument by digitlization probe, and data are saved and export result by secondary instrument.
The beneficial effects of the present invention are:
The advantages of digitlization outer patch ultrasonic liquid level switch measuring system of the invention and its measurement method, is, uses transmitting-receiving
Single probe that conjunction is set, mounting means are simply and efficient.Using the transmission of digitized signal, has the characteristics that strong antijamming capability.
Simultaneous with data storage function, it can be convenient and efficiently read data, analyzed, for parameter to be accurately arranged, and
It is able to carry out self-teaching and amendment, improves the stability, reliability, maintainability of test result.
Detailed description of the invention
Fig. 1 is system connection schematic diagram of the invention.
Fig. 2 is digitlization 4 structural schematic diagrams of probe of the invention.
Fig. 3 is 2 structural schematic diagram of secondary instrument of the invention.
Fig. 4 is 1 structural schematic diagram of hand-held set of the invention.
Specific embodiment
As shown in Figure 1, a kind of digitlization outer patch ultrasonic liquid level switch measuring system and its measurement method, including hand-held set
1, secondary instrument 2 and digitlization probe 4, which is characterized in that pass through between secondary instrument 2 and digitlization probe A 4, digitlization probe B 5
RS485 bus 3 is communicated, and is communicated between hand-held set 1 and secondary instrument 2 by being wirelessly connected, while hand-held set 1 and number
Changing can also be communicated between probe 4, digitlization probe B 5 by RS485 bus, digitlization probe A 4, digitlization probe B 5
In on storage tank 6.
As shown in Fig. 2, the digitlization probe 4 is by power module 7, main control module 8, transmitting module 9, receiving module 10
And RS485 module 12 forms, power module 7 connects main control module 8, receiving module 10, ultrasound involve temperature sensor 11,
RS485 module 12, main control module 8 connect RS485 module 12, main control module 8 and transmitting module 9, and transmitting module 9 connects ultrasonic wave
And temperature sensor 11, the ultrasound that receiving module 10 connects involve temperature sensor 11.
As shown in figure 3, the secondary instrument 2 is by antisurge module 20, power module 13, main control module 14, Wi-Fi module
15, RS485 module 16, SD card memory module 17, display and on & off switch 18, analog or digital interface 19 form, antisurge mould
Block 20 connects power module 13, and power module 13 connects main control module 14, Wi-Fi module 15, RS485 module 16, SD card storage
Module 17, display and on & off switch 18, main control module 14 connect Wi-Fi module 15, RS485 module 16, SD card memory module 17,
Display and on & off switch 18 and analog or digital interface 19.
20 ability to bear of antisurge module is 6kV, and SD card memory module 17 can store up to 40 day datas,
15 maximum communication distance of Wi-Fi module is 3 meters.
The secondary instrument 2 can be attached and be led to up to four digitlization probes 4 simultaneously by RS485 module 16
Letter.
As shown in figure 4, the hand-held set 1 is by power module 21, main control module 22, Wi-Fi module 23, RS485 module
24, display and keyboard 25, SD card memory module 26 form, power module 21 connect main control module 22, Wi-Fi module 23,
RS485 module 24 and SD card memory module 26, main control module 22 connect Wi-Fi module 23, RS485 module 24, display and key
Disk 25 and SD card memory module 26.
The hand-held set 1 can carry out installation detection, data storage and software by the total demand pairs wordization probe 4 of RS485
Upgrading.
The hand-held set 1 can carry out parameter setting, reading data and software upgrading to secondary instrument 2 by Wi-Fi.
A kind of digitlization outer patch ultrasonic liquid level switch measurement method, which comprises the following steps:
1) it is connected using hand-held set 1 with mounted digitlization probe 4, reads and store test curve, and judge automatically installation
As a result；
2) digitlization probe 4 periodically emits the ultrasonic wave of certain frequency to storage tank 6 and acquires echo-signal；
3) Characteristic Extraction, operation and amendment are carried out to collected echo-signal；
4) test result and setting thresholding are compared, thinks that liquid level state changes when test value is greater than thresholding, otherwise recognizes
It is unchanged；
5) acquisition data and test result are transmitted to secondary instrument 2 by digitlization probe 4, and data are saved and export result by secondary instrument 2.
Claims (9)
1. a kind of digitlization outer patch ultrasonic liquid level switch measuring system, including hand-held set (1), secondary instrument (2) and digitlization are visited
Head (4), which is characterized in that pass through RS485 bus (3) between secondary instrument (2) and digitlization probe A (4), digitlization probe B (5)
It is communicated, is communicated between hand-held set (1) and secondary instrument (2) by being wirelessly connected, while hand-held set (1) and digitlization are visited
It can also be communicated by RS485 bus between head (4), digitlization probe B (5), digitlization probe A (4), digitlization probe B
(5) it is located on storage tank (6).
2. a kind of digitlization outer patch ultrasonic liquid level switch measuring system according to claim 1, which is characterized in that described
Digitlization probe (4) by power module (7), main control module (8), transmitting module (9), receiving module (10) and RS485 module
(12) it forms, power module (7) connection main control module (8), receiving module (10), ultrasound involve temperature sensor (11), RS485
Module (12), main control module (8) connect RS485 module (12), main control module (8) and transmitting module (9), and transmitting module (9) is even
It connects ultrasound to involve temperature sensor (11), receiving module (10) connection ultrasound involves temperature sensor (11).
3. a kind of digitlization outer patch ultrasonic liquid level switch measuring system according to claim 1, which is characterized in that described
Secondary instrument (2) by antisurge module (20), power module (13), main control module (14), Wi-Fi module (15), RS485 module
(16), SD card memory module (17), display and on & off switch (18), analog or digital interface (19) composition, antisurge module
(20) power module (13) are connected, power module (13) connects main control module (14), Wi-Fi module (15), RS485 module
(16), SD card memory module (17), display and on & off switch (18), main control module (14) connect Wi-Fi module (15), RS485
Module (16), SD card memory module (17), display and on & off switch (18) and analog or digital interface (19).
4. a kind of digitlization outer patch ultrasonic liquid level switch measuring system according to claim 1, which is characterized in that described
Antisurge module (20) ability to bear be 6kV, SD card memory module (17) can store up to 40 day datas, Wi-Fi module
(15) maximum communication distance is 3 meters.
5. a kind of digitlization outer patch ultrasonic liquid level switch measuring system according to claim 1, which is characterized in that described
Secondary instrument (2) can by RS485 module (16) simultaneously and up to four digitlizations pop one's head in (4) be attached and communicate.
6. a kind of digitlization outer patch ultrasonic liquid level switch measuring system according to claim 1, which is characterized in that described
Hand-held set (1) by power module (21), main control module (22), Wi-Fi module (23), RS485 module (24), display and key
Disk (25), SD card memory module (26) composition, power module (21) connect main control module (22), Wi-Fi module (23), RS485
Module (24) and SD card memory module (26), main control module (22) connect Wi-Fi module (23), RS485 module (24), display
And keyboard (25) and SD card memory module (26).
7. a kind of digitlization outer patch ultrasonic liquid level switch measuring system according to claim 1, which is characterized in that described
Hand-held set (1) installation detection, data storage and software upgrading can be carried out by RS485 total demand pairs wordization probe (4).
8. a kind of digitlization outer patch ultrasonic liquid level switch measuring system according to claim 1, which is characterized in that described
Hand-held set (1) parameter setting, reading data and software upgrading can be carried out to secondary instrument (2) by Wi-Fi.
9. a kind of digitlization outer patch ultrasonic liquid level switch measurement method, which comprises the following steps:
1) using hand-held set (1) and mounted digitlization pop one's head in (4) be connected, reading and store test curve, and judge automatically
Installation results；
2) digitlization probe (4) periodically to the ultrasonic wave of storage tank (6) transmitting certain frequency and acquires echo-signal；
3) Characteristic Extraction, operation and amendment are carried out to collected echo-signal；
4) test result and setting thresholding are compared, thinks that liquid level state changes when test value is greater than thresholding, otherwise recognizes
It is unchanged；
5) digitlization probe (4) will acquire data and test result and be transmitted to secondary instrument (2), and secondary instrument (2) saves data and defeated
Result out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910215506.7A CN109798953A (en) | 2019-03-21 | 2019-03-21 | A kind of digitlization outer patch ultrasonic liquid level switch measuring system and its measurement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375754A (en) * | 2021-04-30 | 2021-09-10 | 上海新昇半导体科技有限公司 | Liquid level detector capable of avoiding foam interference and liquid level detection method |
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| CN202083438U (en) * | 2011-05-19 | 2011-12-21 | 江苏红光仪表厂有限公司 | Wireless communication level gauge externally attached to tank wall |
| CN107167219A (en) * | 2017-07-24 | 2017-09-15 | 江苏迅创科技有限公司 | A kind of self-alignment outer patch ultrasonic liquid level switch measuring system and its measuring method |
| CN108548586A (en) * | 2018-05-09 | 2018-09-18 | 武汉海创鑫科技有限公司 | External labeling type pit alert system and method based on ultrasonic wave reverberation detection |
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2019
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Patent Citations (4)
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|---|---|---|---|---|
| CN101271012A (en) * | 2008-01-30 | 2008-09-24 | 西安华舜测量设备有限责任公司 | Non-contact portable ultrasonic wave liquid level measuring apparatus |
| CN202083438U (en) * | 2011-05-19 | 2011-12-21 | 江苏红光仪表厂有限公司 | Wireless communication level gauge externally attached to tank wall |
| CN107167219A (en) * | 2017-07-24 | 2017-09-15 | 江苏迅创科技有限公司 | A kind of self-alignment outer patch ultrasonic liquid level switch measuring system and its measuring method |
| CN108548586A (en) * | 2018-05-09 | 2018-09-18 | 武汉海创鑫科技有限公司 | External labeling type pit alert system and method based on ultrasonic wave reverberation detection |
Non-Patent Citations (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113375754A (en) * | 2021-04-30 | 2021-09-10 | 上海新昇半导体科技有限公司 | Liquid level detector capable of avoiding foam interference and liquid level detection method |
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Application publication date: 20190524 |