CN209416577U - Water hammer-resistant pressure transmitter - Google Patents
Water hammer-resistant pressure transmitter Download PDFInfo
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- CN209416577U CN209416577U CN201920061357.9U CN201920061357U CN209416577U CN 209416577 U CN209416577 U CN 209416577U CN 201920061357 U CN201920061357 U CN 201920061357U CN 209416577 U CN209416577 U CN 209416577U
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- pressure
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- water hammer
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Abstract
The utility model provides a kind of water hammer-resistant pressure transmitter, including the pressure sensor for detecting pressure of supply water in water supply line, for stablizing Fluid pressure and eliminating the pressure damper of water hammer effect, pressure signal for acquiring pressure sensor carries out the data transmitter of remote transmission, and the controller for controlling data transmitter to ductwork pressure monitoring background transfer pressure data, pressure damper both ends are respectively provided with Fluid pressure input port and Fluid pressure output port, Fluid pressure input port is connected with water supply line, Fluid pressure output port is connected with the pressure detecting port of pressure sensor, the signal output end mouth and controller of pressure sensor are electrically connected, data transmitter and controller are electrically connected.The problem of the utility model solves " water hammer effect " formed in water supply line, is easy to cause the pressure of pressure transmitter remote transmission not accurate or causes stress transmitter damage, influence the monitoring and management of water supply pressure.
Description
Technical field
The utility model belongs to ductwork pressure monitoring technical field, is to be related to a kind of water hammer-resistant pressure change more specifically
Send device.
Background technique
Currently, water undertaking is during the long-range monitoring to each water supply site, water supply dispatcher usually requires to pass through
Include the pipe-network pressure monitoring system of pressure transmitter, the pressure of supply water situation of each water supply site is remotely monitored and managed
Reason, to ensure the pressure of supply water balance and water supply security of each water supply site.However, since the water supply line of each water supply site is one
A closed complex pipeline system, usually can because of water flow change dramatically and cause biggish pressure oscillation, when serious
It also will form " water hammer effect " in hydraulics, be easy to cause the pressure of pressure transmitter remote transmission not accurate, or even make
It is damaged at pressure transmitter, to influence the monitoring and management of water supply pressure.
Utility model content
The purpose of this utility model is to provide a kind of water hammer-resistant pressure transmitters, it is intended to solve existing in the prior art
" water hammer effect " formed in water supply line is easy to cause the pressure of pressure transmitter remote transmission not accurate or causes stress
The problem of transmitter damages, and influences the monitoring and management of water supply pressure.
To achieve the above object, the technical solution adopted in the utility model is to provide a kind of water hammer-resistant pressure transmitter, packet
Include for detect the pressure sensor of pressure of supply water in water supply line, the pressure signal for acquiring the pressure sensor into
The data transmitter of row remote transmission and for control the data transmitter to ductwork pressure monitor background transfer number pressure
According to controller, the data transmitter and controller are electrically connected；The water hammer-resistant pressure transmitter further includes for stablizing
Fluid pressure and the pressure damper for eliminating water hammer effect, pressure damper both ends are respectively provided with Fluid pressure input port
With Fluid pressure output port, the Fluid pressure input port is connected with the water supply line, the Fluid pressure output
Port is connected with the pressure detecting port of the pressure sensor, the signal output end mouth of the pressure sensor and institute
State controller electric connection.
Further, the data transmitter includes the wireless network communication apparatus for wireless data transmission, the nothing
Line network communication device and the controller are electrically connected.
Further, the wireless network communication apparatus includes waterproof shell, communication board and the communication board
The communications module of electric connection and signal transmssion line for the communications module to be electrically connected to the controller, institute
It states letter circuit board and the communications module is set in the waterproof shell.
Further, the wireless network communication apparatus further includes remotely conveying for pressure signal and/or remotely controlling
The received antenna of signal, the antenna are set in the waterproof shell, and the antenna and the communications module are electrically connected.
Further, the communications module uses GPRS, NB-IoT or 4G mould group.
Further, further include signal tune that pressure signal for acquiring the pressure sensor carries out signal condition
Module is managed, the signal input part of the signal conditioning module and the signal output end mouth of the pressure sensor electrically connect
It connects, the signal output end of the signal conditioning module and the controller are electrically connected.
Further, the signal conditioning module includes that the pressure signal for acquiring the pressure sensor is filtered
The traffic filter of wave noise reduction process, for the pressure sensor carry out temperature-compensating temperature-compensating mould group and
The signal amplifier that pressure signal for acquiring the pressure sensor amplifies.
Further, the traffic filter uses low-pass filter.
It further, further include that pressure signal for acquiring the pressure sensor carries out the modulus of analog-to-digital conversion and turns
Parallel operation, the signal input part of the analog-digital converter and the pressure sensor are electrically connected, the signal of the analog-digital converter
Output end and the controller are electrically connected.
Further, the controller includes for the data processor of pressure data processing analysis, for will be through described
The data storage and be used to carry out power supply pipe to data transmitter that pressure data after data processor processes is stored
The power management module of reason.
The beneficial effect of water hammer-resistant pressure transmitter provided by the utility model is: compared with prior art, this is practical
The water hammer-resistant pressure transmitter of novel offer, is provided with pressure damper in water supply line, the water body pressure in water supply line
Pressure detecting and pressure data acquisition are carried out after pressure damper is stable and eliminates water hammer effect, then through pressure sensor,
Not only influence of the water hammer effect to pressure sensor acquisition pressure data accuracy can have been reduced, but also water hammer effect can be effectively prevented
What is formed there is destructive water hammer to cause irreversibility to damage pressure sensor, improve pressure transmitter pressure
While data acquire accuracy and precision, the stability and reliability of pressure transmitter working performance are enhanced, to solve
" water hammer effect " formed in water supply line, is easy to cause the pressure of pressure transmitter remote transmission not accurate or causes to press
The problem of power transmitter damages, and influences the monitoring and scientific management of water supply pressure.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of water hammer-resistant pressure transmitter provided by the embodiment of the utility model；
Fig. 2 is the function block process figure of water hammer-resistant pressure transmitter provided by the embodiment of the utility model.
Wherein, each attached drawing main mark in figure:
1- water supply line；2- pressure sensor；3- pressure damper；4- data transmitter；41- waterproof shell；42- letter
Number transmission line；5- ductwork pressure monitoring backstage；6- controller；7- signal conditioning module；8- analog-digital converter.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined." several " are meant that one or more, unless otherwise clearly specific limit
It is fixed.
In the description of the present invention, it should be understood that term " center ", " length ", " width ", " thickness ",
The orientation of the instructions such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" or
Positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description,
Rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, because
This should not be understood as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements or the interaction relationship of two elements.For those of ordinary skill in the art and
Speech, can understand the concrete meaning of above-mentioned term in the present invention as the case may be.
Also referring to Fig. 1 to 2, now water hammer-resistant pressure transmitter provided by the utility model is illustrated.This is practical
The water hammer-resistant pressure transmitter that new embodiment provides, including the pressure sensor 2 for detecting hydraulic pressure in water supply line 1, use
In stablize Fluid pressure and eliminate the pressure damper 3 of water hammer effect, pressure signal for acquiring pressure sensor 2 carries out
The data transmitter 4 of remote transmission and for controlling data transmitter 4 in a manner of interval or continuous work to pipe network pressure
The controller 6 of pressure data is transmitted on power monitoring backstage 5, and 3 both ends of pressure damper are respectively provided with Fluid pressure input port and stream
Body pressure output port, Fluid pressure input port are connected with water supply line 1, Fluid pressure output port and pressure sensor
2 pressure detecting port is connected, and the signal output end mouth and controller 6 of pressure sensor 2 are electrically connected, and data pass
Device 4 and controller 6 is sent to be electrically connected.
Preferably, pressure sensor 2 uses high-precision solid-state strain gauged formula pressure sensor, pressure sensor 2
Pressure signal can be acquired using silicon piezoresistance type pressure probe, pressure sensor 2 uses solid-state strain gauged formula pressure
Sensor or silicon piezoresistance type pressure probe carry out pressure signal acquisition, have many advantages, such as that measurement accuracy is high, measurement range is wide.When
So, pressure sensor 2 can also use other high-precision pressure sensors or pressure measurement instrument, can be according to actual measurement essence
Degree with need of work and choose, herein with no restrictions.Preferably, controller 6 uses CPU (central processing unit) comprising data
Arithmetic and logic unit, data storage component and control unit.
The basic functional principle of water hammer-resistant pressure transmitter provided by the embodiment of the utility model: the water supplying pipe of water supply site
Water body pressure in road 1 is transferred in pressure damper 3 by the Fluid pressure input port of pressure damper 3, is hindered through pressure
Buddhist nun's device 3 stablize after Fluid pressure, then be transferred to from the Fluid pressure output port of pressure damper 3 pressure of pressure sensor 2
Power detects port, so that pressure sensor 2 carries out pressure data acquisition to the water body pressure in water supply line 1.In this process
In, when the starting or stoping of the supply equipment due to water factory, the unexpected of water supply pressure increase and the valve of water supply line 1 is prominent
Situations are so turned on or off etc., causes water flow change dramatically in closed water supply pipline system and causes biggish pressure wave
When moving and causing the water hammer effect with damaging influence, stablizes Fluid pressure since pressure damper 3 has and eliminate water hammer
Effect can both reduce so that eliminating since water hammer effect causes water supplying pipe the water hammer or water hammer of pressure sensor 2
Water flow change dramatically in road 1 and cause biggish pressure oscillation, to pressure sensor 2 accurately acquisition pressure data shadow
It rings, to improve the accuracy that pressure sensor 2 acquires pressure signal；Water hammer effect can be effectively prevented simultaneously to be formed substantially
Degree fluctuation of pressure damages pressure sensor 2, extends the service life of pressure sensor 2 and pressure transmitter, in turn
Improve the stability and reliability of pressure transmitter working performance.
Water hammer-resistant pressure transmitter provided by the utility model, compared with prior art, waterproof provided by the utility model
It hammers pressure transmitter into shape, pressure damper 3 is provided in water supply line, the water body pressure in water supply line 1 is through pressure damper 3
After stablizing and eliminating water hammer effect, then by the progress pressure detecting of pressure sensor 2 and pressure data acquisition, it can both reduce water
It hammers effect into shape and acquires the influence of pressure data accuracy to pressure sensor 2, and having for water hammer effect formation can be effectively prevented
Destructive water hammer causes irreversibility to damage pressure sensor 2, is improving the acquisition of pressure transmitter pressure data
While accuracy and precision, the stability and reliability of pressure transmitter working performance are enhanced, to solve the prior art
Present in " water hammer effect " that is formed in water supply line 1, be easy to cause the pressure of pressure transmitter remote transmission not accurate or
The problem of person causes stress transmitter damage, influences the monitoring and scientific management of water supply pressure.
Further, referring to Figure 2 together, the specific implementation as water hammer-resistant pressure transmitter provided by the utility model
Mode, data transmitter 4 include the wireless network communication apparatus for wireless data transmission, wireless network communication apparatus and control
Device 6 is electrically connected, in order to which the pressure data signal that pressure sensing acquires is wirelessly transmitted to ductwork pressure prison by pressure transmitter
Control backstage 5 reduces the trouble and workload of each water supply site wiring, improves installation effectiveness, save production and construction cost.
Further, the specific implementation also referring to Fig. 1, as water hammer-resistant pressure transmitter provided by the utility model
Mode, wireless network communication apparatus include waterproof shell 41, communication board, the communication mould being electrically connected with communication board
Group and signal transmssion line 42 for communications module to be electrically connected to controller 6, communication board and communications module setting
In waterproof shell 41, circuit occurs to avoid communication board and communications module watered and wetting or electronic component burns out damage
It ruins.When work, since wireless network communication apparatus and pressure transmitter ontology (controller 6 and pressure sensor 2) are to pass through letter
Number transmission line 42 connects, and separates with pressure transmitter ontology (controller 6 and pressure sensor 2), so as to basis
Actual installation needs or the strong and weak installation site for freely adjusting installing wireless network network communication device of the signal of communication of installation site,
Wireless network communication apparatus can both be installed on the arrangement that signal transmssion line 42 is reduced in well, and wireless network communication apparatus again may be used
Guarantee good communications performance to be installed on well head, reduce the volume of pressure transmitter, reduces pressure transmitter ontology
The difficulty of (controller 6 and pressure sensor 2), the installation, maintenance of wireless network communication apparatus and replacement, to improve work people
The assembly efficiency of member.
Further, the specific embodiment as water hammer-resistant pressure transmitter provided by the utility model, wireless network
Communication device further includes for remotely conveying pressure signal and/or the received antenna of remote control signal, and antenna is set to anti-
In water hull body 41, antenna and communications module are electrically connected.Antenna wirelessly carries out data transmission with ppu, increases
The strong steady and continuous and reliability of communications module signal of communication transmitting-receiving.
Preferably, communications module uses GPRS, NB-IoT or 4G mould group, realizes the real-time upload of pressure acquisition data
To ductwork pressure monitoring backstage 5.Wherein, GPRS is English General Packet Radio Service (general grouped wireless
Service technology) abbreviation, NB-IoT be English Narrow Band Internet of Things (narrowband Internet of Things) abbreviation,
4G is English the 4th Generation mobile communication technology (forth generation mobile communication skill
Art) abbreviation
Further, referring to Figure 2 together, the specific implementation as water hammer-resistant pressure transmitter provided by the utility model
Mode, water hammer-resistant pressure transmitter further include that the pressure simulation electric signal for acquiring pressure sensor 2 carries out signal condition
Signal conditioning module 7, the signal output end mouth of the signal input part of signal conditioning module 7 and pressure sensor 2 is electrical
Connection, the signal output end and controller 6 of signal conditioning module 7 are electrically connected.Signal conditioning module 7 can accurately amplify pressure
The temperature error of pressure simulation electric signal, compensation pressure sensor 2 that force snesor 2 acquires, and pressure can be directly controlled
The calibration process for the pressure simulation electric signal that sensor 2 acquires, to improve water hammer-resistant pressure transmitter to water in water supply line 1
The precision of the detection of pressure.
Specifically, signal conditioning module 7 includes that the pressure simulation electric signal for acquiring pressure sensor 2 is filtered
The traffic filter of noise reduction process, in complete warm range to pressure sensor 2 carry out temperature-compensating temperature-compensating mould group,
And the signal amplifier that the pressure simulation electric signal for acquiring pressure sensor 2 is accurately amplified.Pressure sensor 2
The pressure simulation electric signal of acquisition first passes around traffic filter and is filtered noise reduction process, the pressure mould after filtering noise reduction process
Using temperature-compensating mould group, in complete warm range (0.3% precision in -40 DEG C to 150 DEG C) carries out temperature benefit to quasi- electric signal
It repays, then the pressure simulation electric signal after temperature-compensating is amplified by signal amplifier, amplified pressure signal
Finally ductwork pressure monitoring backstage 5 is wirelessly transmitted to by wireless network communication apparatus under the control of controller 6.
Preferably, traffic filter uses low-pass filter, with acquired pressure sensor 2 by low-pass filter
Pressure simulation electric signal is filtered noise reduction, achievees the purpose that filter out the HF noise signal in pressure simulation electric signal, improves
Precision of the water hammer-resistant pressure transmitter to the detection of hydraulic pressure in water supply line 1.
Further, referring to Figure 2 together, the specific implementation as water hammer-resistant pressure transmitter provided by the utility model
Mode, water hammer-resistant pressure transmitter further include that the pressure simulation electric signal for acquiring pressure sensor 2 carries out analog-to-digital conversion
Analog-digital converter 8, the signal input part of analog-digital converter 8 and pressure sensor 2 be electrically connected, the signal of analog-digital converter 8
Output end and controller 6 are electrically connected.The present embodiment is carried out by the pressure simulation electric signal that setting acquires pressure sensor 2
The analog-digital converter 8 of analog-to-digital conversion is converted to and adopts with making the pressure simulation electric signal fast accurate of the monitoring acquisition of pressure sensor 2
Umerical pressure data, to improve the speed and accuracy rate of the processing analysis of 6 pressure data of controller, to improve waterproof
Pressure transmitter is hammered into shape to the precision of the detection of hydraulic pressure in water supply line 1.
Further, the specific embodiment as water hammer-resistant pressure transmitter provided by the utility model, controller 6 wrap
Include the data processor for pressure data processing analysis, for storing the pressure data after data processor processes
Data storage, for each functional module carry out power management with realize micro energy lose setting power management module.Pressure
After the data processor processes analysis for the pressure data via controller 6 that force snesor 2 acquires, the data for being stored in controller 6 are deposited
On reservoir, controller 6 can be needed according to real work or pre-set program is by the way of discontinuous operation, controls number
Pressure data periodically or is sporadically transmitted to ductwork pressure monitoring backstage 5 according to conveyer 4, and passes through power management module
Efficiently management data transmitter 4 transmits the power consumption under working condition or non-data transmission working condition in data, to reduce
The power consumption of water hammer-resistant pressure transmitter.
Preferably, data transmitter 4 can also use the wireless data transmitter 4 based on LoRa spread spectrum technic, reach
Transmitted at a distance to pressure transmitter and low-power consumption both with technical effect, and then solve pressure transmitter transmit at a distance with
The technical issues of low-power consumption has both.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of water hammer-resistant pressure transmitter, including for detecting the pressure sensor of pressure of supply water in water supply line, being used to incite somebody to action
The pressure signal of the pressure sensor acquisition carries out the data transmitter of remote transmission and for controlling the data transmission
To the controller of ductwork pressure monitoring background transfer pressure data, the data transmitter and controller are electrically connected device, special
Sign is: the water hammer-resistant pressure transmitter further includes the pressure damper for stablizing Fluid pressure and eliminating water hammer effect,
The pressure damper both ends are respectively provided with Fluid pressure input port and Fluid pressure output port, the Fluid pressure input
Port is connected with the water supply line, the pressure detecting port phase of the Fluid pressure output port and the pressure sensor
Connection, the signal output end mouth and the controller of the pressure sensor are electrically connected.
2. water hammer-resistant pressure transmitter as described in claim 1, it is characterised in that: the data transmitter includes for wireless
The wireless network communication apparatus of data transmission, the wireless network communication apparatus and the controller are electrically connected.
3. water hammer-resistant pressure transmitter as claimed in claim 2, it is characterised in that: the wireless network communication apparatus includes anti-
The communications module and be used for the communications module electricity that water hull body, communication board and the communication board are electrically connected
Property is connected to the signal transmssion line of the controller, and the letter circuit board and the communications module are set to the waterproof shell
In.
4. water hammer-resistant pressure transmitter as claimed in claim 3, it is characterised in that: the wireless network communication apparatus further includes
It is remotely conveyed for pressure signal and/or the received antenna of remote control signal, the antenna is set in the waterproof shell,
The antenna and the communications module are electrically connected.
5. water hammer-resistant pressure transmitter as claimed in claim 3, it is characterised in that: the communications module uses GPRS, NB-
IoT 4G mould group.
6. water hammer-resistant pressure transmitter as described in claim 1, it is characterised in that: further include for by the pressure sensor
The pressure signal of acquisition carries out the signal conditioning module of signal condition, the signal input part of the signal conditioning module and the pressure
The signal output end mouth of force snesor is electrically connected, the signal output end of the signal conditioning module and controller electricity
Property connection.
7. water hammer-resistant pressure transmitter as claimed in claim 6, it is characterised in that: the signal conditioning module includes for inciting somebody to action
The pressure signal of the pressure sensor acquisition is filtered the traffic filter of noise reduction process, for the pressure sensing
What the temperature-compensating mould group of device progress temperature-compensating and the pressure signal for acquiring the pressure sensor amplified
Signal amplifier.
8. water hammer-resistant pressure transmitter as claimed in claim 7, it is characterised in that: the traffic filter uses low-pass filtering
Device.
9. water hammer-resistant pressure transmitter as described in claim 1, it is characterised in that: further include for by the pressure sensor
The pressure signal of acquisition carries out the analog-digital converter of analog-to-digital conversion, and the signal input part of the analog-digital converter and the pressure pass
Sensor is electrically connected, and the signal output end of the analog-digital converter and the controller are electrically connected.
10. water hammer-resistant pressure transmitter as described in any one of claim 1 to 9, it is characterised in that: the controller includes using
In the data processor of pressure data processing analysis, for the pressure data after the data processor processes to be stored
Data storage and for data transmitter carry out power management power management module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920061357.9U CN209416577U (en) | 2019-01-11 | 2019-01-11 | Water hammer-resistant pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920061357.9U CN209416577U (en) | 2019-01-11 | 2019-01-11 | Water hammer-resistant pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209416577U true CN209416577U (en) | 2019-09-20 |
Family
ID=67943720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920061357.9U Active CN209416577U (en) | 2019-01-11 | 2019-01-11 | Water hammer-resistant pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209416577U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU198768U1 (en) * | 2020-03-13 | 2020-07-28 | Сергей Юрьевич Метлицкий | DEVICE FOR CONTROL OF WATER LEAKAGE FROM UNDER THE FILTER FLASK |
| CN115046678A (en) * | 2022-08-15 | 2022-09-13 | 山东金宇信息科技集团有限公司 | Method and device for monitoring pressure of fire fighting pipeline in tunnel and storage medium |
-
2019
- 2019-01-11 CN CN201920061357.9U patent/CN209416577U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU198768U1 (en) * | 2020-03-13 | 2020-07-28 | Сергей Юрьевич Метлицкий | DEVICE FOR CONTROL OF WATER LEAKAGE FROM UNDER THE FILTER FLASK |
| CN115046678A (en) * | 2022-08-15 | 2022-09-13 | 山东金宇信息科技集团有限公司 | Method and device for monitoring pressure of fire fighting pipeline in tunnel and storage medium |
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Address after: 518000 3203, block D, building 1, Section 1, Chuangzhi Yuncheng, Liuxian Avenue, Xili community, Xili street, Nanshan District, Shenzhen, Guangdong Province Patentee after: Shenzhen Tuoan Trust Internet of Things Co.,Ltd. Address before: 518000 Tangtou community, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN ANSO MEASUREMENT & CONTROL INSTRUMENTS CO.,LTD. |