CN211477397U - Vibration acceleration sensor device and vibration acceleration detection system - Google Patents
Vibration acceleration sensor device and vibration acceleration detection system Download PDFInfo
- Publication number
- CN211477397U CN211477397U CN202020394037.8U CN202020394037U CN211477397U CN 211477397 U CN211477397 U CN 211477397U CN 202020394037 U CN202020394037 U CN 202020394037U CN 211477397 U CN211477397 U CN 211477397U
- Authority
- CN
- China
- Prior art keywords
- acceleration sensor
- vibration acceleration
- module
- capacitor
- sensor device
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The application relates to a vibration acceleration sensor device and a vibration acceleration detection system, and belongs to the technical field of vibration acceleration sensors. The method comprises the following steps: the acceleration sensor module is used for detecting the vibration of the detected object to obtain a vibration acceleration signal in the form of an analog signal; the processor module is used for receiving the vibration acceleration signals in the form of analog signals sent by the facility acceleration sensor module and converting the vibration acceleration signals in the form of analog signals into vibration acceleration signals in the form of digital signals; the 4G communication module is used for receiving the vibration acceleration signals in the digital signal form converted by the processor module and sending the vibration acceleration signals in the digital signal form to a specified terminal server through the 4G antenna module; and the power supply module is used for providing a working power supply for the vibration acceleration sensor device. The problem of voltage signal transmission loss caused by field wiring environment restriction can be avoided through the method and the device.
Description
Technical Field
The application belongs to the technical field of vibration acceleration sensor devices, and particularly relates to a vibration acceleration sensor device and a vibration acceleration detection system.
Background
The vibration acceleration sensor device is important equipment for engineering dynamic test. The traditional vibration acceleration sensor device is a wired transmission sensor and transmits voltage signals. When the sensor is applied to large-scale engineering implementation of bridges, dams and the like, the implementation is often limited by field environments, and often, wiring is inconvenient greatly, and particularly, for example, on the bridges or the dams, the installation positions of all sensors are relatively far, the wiring is too long, and voltage signal transmission loss exists on the wires.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the related art at least to a certain extent, the application provides a vibration acceleration sensor device and a vibration acceleration detection system, and the problem of voltage signal transmission loss caused by field wiring environment restriction is avoided.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect,
the application provides a vibration acceleration sensor device, includes:
the acceleration sensor module is used for detecting the vibration of the detected object to obtain a vibration acceleration signal in the form of an analog signal;
the processor module is used for receiving the vibration acceleration signals in the form of analog signals sent by the facility acceleration sensor module and converting the vibration acceleration signals in the form of analog signals into vibration acceleration signals in the form of digital signals;
the 4G communication module is used for receiving the vibration acceleration signals in the digital signal form converted by the processor module and sending the vibration acceleration signals in the digital signal form to a designated terminal server through the 4G antenna module; and
and the power supply module is used for providing a working power supply for the vibration acceleration sensor device.
Further, the acceleration sensor module includes:
an acceleration sensor chip, a capacitor C11, a capacitor C12, capacitors C13, C14, a capacitor C15, a capacitor C16, an inductor L1 and an inductor L2, wherein,
the acceleration sensor chip includes: AVDD pin, AVDD1.8 pin, DVDD pin and DVDD1.8 pin;
one end of the capacitor C11 is connected with the AVDD1.8 pin, and the other end of the capacitor C11 is connected to AGND;
one end of the capacitor C12 is connected with the DVDD1.8 pin, and the other end of the capacitor C12 is connected to GND;
the capacitor C13 and the capacitor C14 form a first parallel circuit, one end of the first parallel circuit is connected with the AVDD pin, and the other end of the first parallel circuit is connected to the AGND;
the capacitor C15 and the capacitor C16 form a second parallel circuit, one end of the second parallel circuit is connected to VCC3.3V together with the DVDD pin and the inductor L1, and the other end of the second parallel circuit is connected to GND;
the other end of the inductor L1 is connected with the AVDD pin; and
one end of the inductor L2 is connected to AGND, and the other end is connected to GND.
Further, the 4G antenna module includes:
a resistor R21, a capacitor C21, a capacitor C22, a bidirectional regulator TVS1 and an antenna Ant, wherein,
one end of the resistor R21 is connected with the output end of the 4G communication module, and the other end of the resistor R21 is connected with the antenna Ant;
the capacitor C21, one end is connected to the circuit between the resistor R2 and the 4G communication module, and the other end is grounded;
one end of the capacitor C22 is connected to the circuit between the resistor R2 and the antenna Ant, and the other end is grounded;
one end of the bidirectional voltage regulator TVS1 is connected to a circuit between the resistor R2 and the antenna Ant, and the other end of the bidirectional voltage regulator TVS1 is grounded.
Further, the vibration acceleration sensor device further includes:
and the state indicating module is used for receiving the state indicating signal sent by the processor module and carrying out corresponding lighting prompt.
Further, the status indication module includes:
an inverter 74HC04D and light emitting diodes connected to respective indication outputs of the inverter 74HC 04D.
Further, the vibration acceleration sensor device further includes:
and the RS-485 communication module is used for providing a wired communication interface for the vibration acceleration sensor device so as to be in wired communication connection with an external analysis terminal, and transmitting the vibration acceleration signal in the form of the digital signal converted by the processor module to the external analysis terminal in a wired communication mode.
Further, the RS-485 communication module adopts a MAX13485EESA integrated circuit.
Further, the processor module adopts an MCU processor.
Further, the power module includes:
the solar energy conversion device comprises a solar panel, a solar controller and an electricity storage battery, wherein the solar panel converts light energy into electric energy, and the electric energy is stored in the electricity storage battery through the solar controller so as to provide a working power supply for the vibration acceleration sensor device.
In a second aspect of the present invention,
the application provides vibration acceleration detecting system includes:
a server, and
a plurality of the vibration acceleration sensor devices as described in any of the above, each of the vibration acceleration sensor devices being wirelessly connected to the server.
This application adopts above technical scheme, possesses following beneficial effect at least:
through the vibration acceleration sensor device that supplies that this application provided, when being applied to such as bridge, dam etc. and receive site environment restriction, wiring have during the large-scale engineering implementation of very big inconvenience, can realize the vibration acceleration who gathers through 4G wireless network transmission, can avoid leading to the problem of voltage signal transmission loss because of site wiring environment restriction, and then can satisfy such as bridge, dam etc. and receive site environment restriction, wiring have the vibration monitoring demand of large-scale engineering implementation of very big inconvenience.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram schematic diagram of a vibratory acceleration sensor apparatus shown in accordance with an exemplary embodiment;
FIG. 2 is a block diagram schematic diagram of an acceleration sensor module shown in accordance with an exemplary embodiment;
fig. 3 is a block diagram schematic diagram of a 4G antenna module shown in accordance with an exemplary embodiment;
FIG. 4 is a block diagram schematic diagram of a vibratory acceleration sensor apparatus shown in accordance with another exemplary embodiment;
FIG. 5 is a block diagram representation of a status indication module in accordance with another exemplary embodiment;
FIG. 6 is a schematic diagram of a circuit configuration of an RS-485 communication module, according to an exemplary embodiment;
FIG. 7 is a block diagram schematic diagram of a vibratory acceleration sensor apparatus shown in accordance with another exemplary embodiment;
fig. 8 is a block diagram configuration diagram illustrating a vibration acceleration detection system according to an exemplary embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a block diagram schematically illustrating a vibration acceleration sensor device according to an exemplary embodiment, where the vibration acceleration sensor device 11 includes:
an acceleration sensor module 101 for detecting vibration of the object to be detected to obtain a vibration acceleration signal in the form of an analog signal;
the processor module 102 is configured to receive a vibration acceleration signal in an analog signal form sent by the facility acceleration sensor module 101, and convert the vibration acceleration signal in the analog signal form into a vibration acceleration signal in a digital signal form;
the 4G communication module 103 is configured to receive the vibration acceleration signal in the form of a digital signal converted by the processor module 102, and send the vibration acceleration signal in the form of a digital signal to a designated terminal server through the 4G antenna module 104; and
and a power supply module 105, configured to provide an operating power supply for the vibration acceleration sensor apparatus 11.
Specifically, the conventional vibration acceleration sensor device 11 is a wired transmission sensor, and transmits a voltage signal. When the sensor is applied to engineering implementation of bridges, dams and the like, the sensor is often limited by field environment, and often, wiring is inconvenient greatly, for example, the installation positions of all sensors on the bridges or the dams are relatively far, the wiring is too long, and voltage signal transmission loss exists on the wires. The vibration acceleration sensor device 11 provided by the application is installed at each vibration monitoring point when being applied to large-scale engineering implementation such as bridges and dams which are restricted by field environment and inconvenient to wire, the limitation of the distance position of each monitoring point is not considered, the acceleration sensor module 101 transmits a monitored vibration acceleration signal in an analog signal form to the processor module 102, the processor module 102 converts the vibration acceleration signal into a vibration acceleration signal in a digital signal form, and then the vibration acceleration signal is transmitted to the 4G communication module 103, the 4G communication module 103 transmits the vibration acceleration signal to a specified terminal server through the 4G antenna module 104, monitored data are stored, and a worker can analyze each monitoring point by calling the monitoring data stored in the terminal server. Therefore, through the method and the device, the vibration acceleration acquired through the 4G wireless network transmission can be realized, the problem of voltage signal transmission loss caused by the restriction of field wiring environment can be avoided, and the requirements of engineering implementation vibration monitoring such as bridges and dams which are restricted by the field environment and inconvenient in wiring can be met.
In practical applications, the processor module 102 may adopt an MCU processor, and in the related art, the MCU processor has a corresponding sensor access port and an a/D conversion function to convert analog signal data detected by the sensor into digital signal data. For the 4G communication module 103, a communication module of a 4G standard corresponding to each communication carrier in the related art may be used.
For the acceleration sensor module 101, in an embodiment, please refer to fig. 2, fig. 2 is a block diagram illustrating the acceleration sensor module according to an exemplary embodiment, where the acceleration sensor module 101 includes:
an acceleration sensor chip U, a capacitor C11, a capacitor C12, capacitors C13, C14, a capacitor C15, a capacitor C16, an inductor L1 and an inductor L2, wherein,
the acceleration sensor chip includes: AVDD pin, AVDD1.8 pin, DVDD pin and DVDD1.8 pin;
one end of the capacitor C11 is connected with the AVDD1.8 pin, and the other end of the capacitor C11 is connected to AGND;
one end of the capacitor C12 is connected with the DVDD1.8 pin, and the other end of the capacitor C12 is connected to GND;
the capacitor C13 and the capacitor C14 form a first parallel circuit, one end of the first parallel circuit is connected with the AVDD pin, and the other end of the first parallel circuit is connected to the AGND;
the capacitor C15 and the capacitor C16 form a second parallel circuit, one end of the second parallel circuit is connected to VCC3.3V together with the DVDD pin and the inductor L1, and the other end of the second parallel circuit is connected to GND;
the other end of the inductor L1 is connected with the AVDD pin; and
one end of the inductor L2 is connected to AGND, and the other end is connected to GND.
Specifically, the acceleration sensor chip is a product existing in the related art, as shown in fig. 2, the acceleration sensor chip has 14 functional pins, and in an actual product, for example, the ADXL2345 model triaxial acceleration sensor chip correspondingly has 14 functional pins.
For the 4G antenna module 104, in an embodiment, please refer to fig. 3, fig. 3 is a block diagram illustrating a 4G antenna module according to an exemplary embodiment, where the 4G antenna module 104 includes:
a resistor R21, a capacitor C21, a capacitor C22, a bidirectional regulator TVS1 and an antenna Ant, wherein,
one end of the resistor R21 is connected with the output end of the 4G communication module 103, and the other end of the resistor R21 is connected with the antenna Ant;
the capacitor C21, one end of which is connected to the circuit between the resistor R2 and the 4G communication module 103, and the other end of which is grounded;
one end of the capacitor C22 is connected to the circuit between the resistor R2 and the antenna Ant, and the other end is grounded;
one end of the bidirectional voltage regulator TVS1 is connected to a circuit between the resistor R2 and the antenna Ant, and the other end of the bidirectional voltage regulator TVS1 is grounded.
Referring to fig. 4, fig. 4 is a block diagram of a vibration acceleration sensor device according to another exemplary embodiment, where the vibration acceleration sensor device 11 further includes:
and the status indication module 106 is configured to receive the status indication signal sent by the processor module 102, and perform a corresponding lighting prompt.
In particular, the status indication module 106 may indicate the relevant operating status of the vibration acceleration sensor device 11.
Further, referring to fig. 5 for the status indication module 106, fig. 5 is a schematic block diagram illustrating the status indication module according to another exemplary embodiment, where the status indication module 106 includes:
an inverter 74HC04D and light emitting diodes connected to respective indication outputs of the inverter 74HC 04D.
Referring to fig. 4, the vibration acceleration sensor device 11 further includes:
and the RS-485 communication module 107 is configured to provide a wired communication interface for the vibration acceleration sensor device 11, so as to perform wired communication connection with an external analysis terminal, and send the vibration acceleration signal in the form of a digital signal converted by the processor module 102 to the external analysis terminal in a wired communication manner.
Specifically, through the RS-485 communication module 107, the vibration acceleration sensor device 11 provided in the present application can transmit data in a wired manner on the basis of having a wireless data transmission function, so as to facilitate selection by a user. In practical applications, please refer to fig. 6, fig. 6 is a schematic circuit diagram of an RS-485 communication module according to an exemplary embodiment, and the RS-485 communication module 107 may be implemented by a MAX13485EESA integrated circuit.
Referring to fig. 7, fig. 7 is a block diagram of a vibration acceleration sensor device according to another exemplary embodiment, in the vibration acceleration sensor device 11, a power module 105 includes:
a solar panel 105a, a solar controller 105b and an electric storage cell 105c, wherein the solar panel 105a converts light energy into electric energy, and the electric energy is stored in the electric storage cell 105c through the solar controller 105b to provide working power for the vibration acceleration sensor device 11.
Specifically, when the sensor is applied to engineering implementation of bridges, dams and the like, the sensor is often limited by field environment, on one hand, wiring is often inconvenient, for example, the installation position of each sensor on a bridge or a dam is relatively far, the wiring is too long, and voltage signal transmission loss exists on the wire; on the other hand, the power supply source is also inconvenient to arrange, and the power supply requirement of the vibration acceleration sensor device 11 in the remote inconvenient place monitoring can be met by utilizing solar power generation for power supply through the scheme of the embodiment.
Referring to fig. 8, fig. 8 is a block diagram of a vibration acceleration detection system according to an exemplary embodiment, where the vibration acceleration detection system 1 includes:
a server 12, and
a plurality of the vibration acceleration sensor devices 11 as described above, wherein each of the vibration acceleration sensor devices 11 is wirelessly connected to the server 12.
With regard to the vibration acceleration detection system 1 in the above-described embodiment, the detailed operation of the vibration acceleration sensor device 11 has been described in detail in the above-described embodiment, and will not be described in detail here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "plurality" means at least two unless otherwise specified.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Further, "connected" as used herein may include wirelessly connected. The term "and/or" is used to include any and all combinations of one or more of the associated listed items.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A vibration acceleration sensor device, characterized by comprising:
the acceleration sensor module is used for detecting the vibration of the detected object to obtain a vibration acceleration signal in the form of an analog signal;
the processor module is used for receiving the vibration acceleration signals in the form of analog signals sent by the facility acceleration sensor module and converting the vibration acceleration signals in the form of analog signals into vibration acceleration signals in the form of digital signals;
the 4G communication module is used for receiving the vibration acceleration signals in the digital signal form converted by the processor module and sending the vibration acceleration signals in the digital signal form to a designated terminal server through the 4G antenna module; and
and the power supply module is used for providing a working power supply for the vibration acceleration sensor device.
2. The vibratory acceleration sensor device of claim 1, characterized in that the acceleration sensor module comprises:
an acceleration sensor chip, a capacitor C11, a capacitor C12, capacitors C13, C14, a capacitor C15, a capacitor C16, an inductor L1 and an inductor L2, wherein,
the acceleration sensor chip includes: AVDD pin, AVDD1.8 pin, DVDD pin and DVDD1.8 pin;
one end of the capacitor C11 is connected with the AVDD1.8 pin, and the other end of the capacitor C11 is connected to AGND;
one end of the capacitor C12 is connected with the DVDD1.8 pin, and the other end of the capacitor C12 is connected to GND;
the capacitor C13 and the capacitor C14 form a first parallel circuit, one end of the first parallel circuit is connected with the AVDD pin, and the other end of the first parallel circuit is connected to the AGND;
the capacitor C15 and the capacitor C16 form a second parallel circuit, one end of the second parallel circuit is connected to VCC3.3V together with the DVDD pin and the inductor L1, and the other end of the second parallel circuit is connected to GND;
the other end of the inductor L1 is connected with the AVDD pin; and
one end of the inductor L2 is connected to AGND, and the other end is connected to GND.
3. The vibratory acceleration sensor apparatus of claim 1, characterized in that the 4G antenna module comprises:
a resistor R21, a capacitor C21, a capacitor C22, a bidirectional regulator TVS1 and an antenna Ant, wherein,
one end of the resistor R21 is connected with the output end of the 4G communication module, and the other end of the resistor R21 is connected with the antenna Ant;
the capacitor C21, one end is connected to the circuit between the resistor R2 and the 4G communication module, and the other end is grounded;
one end of the capacitor C22 is connected to the circuit between the resistor R2 and the antenna Ant, and the other end is grounded;
one end of the bidirectional voltage regulator TVS1 is connected to a circuit between the resistor R2 and the antenna Ant, and the other end of the bidirectional voltage regulator TVS1 is grounded.
4. The vibratory acceleration sensor device of any one of claims 1-3, characterized in that the vibratory acceleration sensor device further comprises:
and the state indicating module is used for receiving the state indicating signal sent by the processor module and carrying out corresponding lighting prompt.
5. The vibratory acceleration sensor apparatus of claim 4, characterized in that the status indication module comprises:
an inverter 74HC04D and light emitting diodes connected to respective indication outputs of the inverter 74HC 04D.
6. The vibratory acceleration sensor device of any one of claims 1-3, characterized in that the vibratory acceleration sensor device further comprises:
and the RS-485 communication module is used for providing a wired communication interface for the vibration acceleration sensor device so as to be in wired communication connection with an external analysis terminal, and transmitting the vibration acceleration signal in the form of the digital signal converted by the processor module to the external analysis terminal in a wired communication mode.
7. The vibration acceleration sensor device of claim 6, characterized in that, the RS-485 communication module uses a MAX13485EESA integrated circuit.
8. The vibratory acceleration sensor device of claim 1, wherein the processor module employs an MCU processor.
9. The vibratory acceleration sensor apparatus of claim 1, characterized in that the power module comprises:
the solar energy conversion device comprises a solar panel, a solar controller and an electricity storage battery, wherein the solar panel converts light energy into electric energy, and the electric energy is stored in the electricity storage battery through the solar controller so as to provide a working power supply for the vibration acceleration sensor device.
10. Vibration acceleration detecting system characterized by, includes:
a server, and
a plurality of the vibration acceleration sensor device of any one of claims 1 to 9, each of the vibration acceleration sensor devices being wirelessly connected to the server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020394037.8U CN211477397U (en) | 2020-03-25 | 2020-03-25 | Vibration acceleration sensor device and vibration acceleration detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020394037.8U CN211477397U (en) | 2020-03-25 | 2020-03-25 | Vibration acceleration sensor device and vibration acceleration detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211477397U true CN211477397U (en) | 2020-09-11 |
Family
ID=72364082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020394037.8U Active CN211477397U (en) | 2020-03-25 | 2020-03-25 | Vibration acceleration sensor device and vibration acceleration detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211477397U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091888A (en) * | 2021-03-11 | 2021-07-09 | 西安交通大学 | Self-powered vibration monitoring system for power transmission line |
-
2020
- 2020-03-25 CN CN202020394037.8U patent/CN211477397U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091888A (en) * | 2021-03-11 | 2021-07-09 | 西安交通大学 | Self-powered vibration monitoring system for power transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201576048U (en) | Thunder and lightning automatic monitoring system | |
| CN106324530A (en) | Power supply detection method and device | |
| CN211477397U (en) | Vibration acceleration sensor device and vibration acceleration detection system | |
| CN103306897A (en) | Wireless monitoring device and wireless monitoring system applicable to wind power generator | |
| CN109782051B (en) | Load current abnormity early warning device, system and method based on Internet of things | |
| JPWO2013118515A1 (en) | Sensor terminal and sensor network system | |
| CN217443506U (en) | Motor state detection device | |
| CN203632664U (en) | Portable fault detector for remote power-collecting system equipment | |
| CN115226058A (en) | Intelligent monitoring wireless sensor and monitoring and early warning system for template support | |
| CN205274925U (en) | Monitored control system suitable for elevator in building | |
| CN103615290A (en) | Mining safety monitoring and control substation for voice intercom and online intrinsic safety power supply monitoring | |
| CN209974071U (en) | Elevator light curtain device, elevator and elevator internet of things system | |
| JP3225941U (en) | Power supply system and power monitoring device | |
| CN102393510A (en) | Detection system for standing power supply | |
| CN218413282U (en) | Visual factory workshop remote data monitoring system based on thing networking | |
| CN205229862U (en) | Humiture monitoring system based on electric power carrier wave communication | |
| CN110207815A (en) | A kind of radio noise monitoring system | |
| CN218181077U (en) | Mining intrinsic safety type cable fault testing system | |
| CN217358733U (en) | Extensible weighing transmitter and extensible weighing device | |
| CN210438232U (en) | Elevator light curtain device, elevator and elevator internet of things system | |
| CN209878914U (en) | Passive short circuit grounding fault indicator with temperature measuring function | |
| CN212807011U (en) | Wireless inclinometer | |
| CN210036680U (en) | Strain wireless real-time acquisition device | |
| CN217985419U (en) | Intelligent monitoring wireless sensor and monitoring and early warning system for template bracket | |
| CN210438254U (en) | Elevator light curtain device, elevator and elevator internet of things system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |