CN-122028004-A - Distributed measurement wireless sensor network

CN122028004ACN 122028004 ACN122028004 ACN 122028004ACN-122028004-A

Abstract

The invention discloses a distributed measurement wireless sensing network, which comprises a central node and sub-nodes, wherein the sub-nodes are divided into a sub-node I and a sub-node II, the central node is used for synchronizing a system clock, collecting sensor wireless signals uploaded by the sub-nodes, summarizing and packaging the sensor wireless signals and uploading the sensor wireless signals to an upper computer, receiving an upper computer configuration signal to configure the wireless sensing network, the sub-node I is used for collecting temperature signals, at most, 18 paths of thermocouple temperature signals can be collected at the same time, packaging sensor data is uploaded to the central node, the thermocouple type can be freely topological according to the use requirement of a user, and the sub-node II is used for collecting vibration sensor signals, packaging the sensor data is uploaded to the central node, and at most, 3 paths of vibration signals can be collected simultaneously. The invention can realize reliable and safe acquisition of distributed multi-measuring-point sensing signals in compact space.

Inventors

WANG KUOCHUAN
HUANG MANGUO
XU HUI
SUN FUTAO
LI WENFENG
ZHANG XIAOFEI
LU CHAO
MENG XIANGJUN
WU JIALING
XUE HAOYANG

Assignees

北京航天计量测试技术研究所

Dates

Publication Date: 20260512
Application Date: 20251125

Claims (7)

1. The distributed measurement wireless sensing network is characterized by comprising a central node and sub-nodes, wherein the sub-nodes are divided into a sub-node I and a sub-node II; The central node is used for synchronizing a system clock, collecting sensor wireless signals uploaded by the child nodes, summarizing and packaging, uploading to the upper computer, and receiving an upper computer configuration signal to configure the wireless sensor network; The child node I is used for collecting temperature signals, and can collect 18 paths of thermocouple temperature signals at most simultaneously, package sensor data to the central node, and the thermocouple type can be free in topology according to the use requirement of a user; The child node II is used for collecting vibration sensor signals, packaging sensor data and uploading the sensor data to the central node, and at most 3 paths of vibration signals can be collected simultaneously.
2. The distributed measurement wireless sensor network of claim 1, wherein the sub-nodes comprise a housing, a base plate, an upper cover plate, an antenna, a printed board, a battery pressure ring, and a connector; The upper end and the lower end of the shell are open, an independent battery compartment is arranged in the shell, the open end of the battery compartment is located at the lower end of the shell, the upper cover plate and the bottom plate are respectively arranged at the upper end and the lower end of the shell to completely seal the upper cover plate and the lower end of the shell, the antenna is fixed in the upper cover plate, the printed board is fixedly connected with the upper end face of the shell, the space between the printed board and the upper cover plate is the antenna compartment, the battery is arranged in the battery compartment through a battery compression ring, a wiring compartment is formed by a cavity between the battery compartment, the printed board and the shell, a side wall opening of the shell is communicated with the wiring compartment, and the connector is arranged at the opening of the side wall of the shell.
3. The distributed measurement wireless sensor network of claim 2, wherein the shells of the central node and the sub-nodes are formed by integrally turning aluminum alloy materials.
4. A distributed measurement wireless sensor network as claimed in claim 3 wherein shield mounting pads are reserved on the printed board in the radio frequency working area and the shield is welded to ensure good electromagnetic compatibility of the product.
5. The distributed measurement wireless sensor network of claim 4, wherein the upper cover plates of the central node and the sub-nodes are made of polytetrafluoroethylene materials, and the antenna is adhered to the inside of the upper cover plates during installation.
6. The distributed measurement wireless sensing network of claim 5, wherein the antenna is a hemispherical-emitting rectangular microstrip antenna, the antenna back plate is subjected to large-area copper-clad treatment, the working frequency band is 915MHz, the radio frequency signal emitting direction is perpendicular to the back plate, and the outside hemispherical-emitting direction does not cause radio frequency interference to the printed board.
7. A distributed measurement wireless sensor network according to claim 5 or 6, wherein the battery pressure ring is made of polytetrafluoroethylene and has both a battery insulation function and a mechanical fixing function.

Description

Distributed measurement wireless sensor network Technical Field The invention relates to a distributed measurement wireless sensing network which is applied to a large number of distributed measurement scenes in a compact space. Background In special application scenes such as aviation, aerospace, trains and the like, the sensing system has the characteristics of multiple parameters and complex model spectrum, and new requirements are put on the aspects of volume, weight and the like of the sensor. The wireless sensing technology is more and more widely applied in the related fields due to the characteristics of no cabling, flexible arrangement, convenient use and the like. The application of the related scene is characterized in that a large number of sensing points are required to be arranged in a local area, a single wireless acquisition node is required to carry out integrated acquisition on multiple paths of signals to realize distributed measurement, and meanwhile, the safety of the wireless acquisition node is required to be higher because a measurement object is a valuable product. At present, wireless sensing technologies in the civil field, such as Zigbee, lora and the like, have the problems of 1, frequent network topology conversion, unstable communication connection, 2, limitation by node energy, possibility of entering a low-power consumption mode and influence on communication quality in the aspect of communication reliability. The security problems include 1, the public communication band is easy to receive interference on the communication band, 2, the communication protocol is disclosed and can be decoded and obtained by a third party, and 3, the authentication mechanism is imperfect and can be accessed by the third party. Therefore, the existing wireless sensing technology cannot meet the requirements in terms of communication reliability and safety. Disclosure of Invention In view of the above, the invention provides a distributed measurement wireless sensing network, which can realize reliable and safe acquisition of distributed multi-measuring-point sensing signals in a compact space. The distributed measurement wireless sensing network comprises a central node and sub-nodes, wherein the sub-nodes are divided into a sub-node I and a sub-node II; The central node is used for synchronizing a system clock, collecting sensor wireless signals uploaded by the child nodes, summarizing and packaging, uploading to the upper computer, and receiving an upper computer configuration signal to configure the wireless sensor network; The child node I is used for collecting temperature signals, and can collect 18 paths of thermocouple temperature signals at most simultaneously, package sensor data to the central node, and the thermocouple type can be free in topology according to the use requirement of a user; The child node II is used for collecting vibration sensor signals, packaging sensor data and uploading the sensor data to the central node, and at most 3 paths of vibration signals can be collected simultaneously. Further, the sub-node comprises a shell, a bottom plate, an upper cover plate, an antenna, a printed board, a battery compression ring and a connector; The upper end and the lower end of the shell are open, an independent battery compartment is arranged in the shell, the open end of the battery compartment is located at the lower end of the shell, the upper cover plate and the bottom plate are respectively arranged at the upper end and the lower end of the shell to completely seal the upper cover plate and the lower end of the shell, the antenna is fixed in the upper cover plate, the printed board is fixedly connected with the upper end face of the shell, the space between the printed board and the upper cover plate is the antenna compartment, the battery is arranged in the battery compartment through a battery compression ring, a wiring compartment is formed by a cavity between the battery compartment, the printed board and the shell, a side wall opening of the shell is communicated with the wiring compartment, and the connector is arranged at the opening of the side wall of the shell. Further, the shells of the center node and the sub-nodes are formed by integrally turning aluminum alloy materials. Further, shielding case mounting pads are reserved in a radio frequency working area on the printed board, and shielding cases are welded, so that good electromagnetic compatibility of products is guaranteed. Further, the upper cover plates of the center node and the sub-nodes are processed by polytetrafluoroethylene materials, and the antenna is adhered to the inside of the upper cover plate during installation. Further, the antenna is a hemispherical-emitting rectangular microstrip antenna, the antenna backboard is subjected to large-area copper plating treatment, the working frequency band is 915MHz, the radio frequency signal emitting direction is perpendicular to the outer hemispherica