CN112050986A - Cable force monitoring device, cable force monitoring system and cable force monitoring method - Google Patents
Cable force monitoring device, cable force monitoring system and cable force monitoring method Download PDFInfo
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- CN112050986A CN112050986A CN202010979147.5A CN202010979147A CN112050986A CN 112050986 A CN112050986 A CN 112050986A CN 202010979147 A CN202010979147 A CN 202010979147A CN 112050986 A CN112050986 A CN 112050986A
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
Abstract
The invention relates to a cable force monitoring device, comprising: the system comprises an MEMS acceleration sensor, an acquisition circuit board, a battery and an NB-IoT wireless communication module, wherein the acquisition circuit board comprises a power management system, a signal conditioning conversion element, a threshold monitoring element, a Bluetooth element, a real-time clock element and a microcontroller, the power management system is connected with the signal conditioning conversion element, the threshold monitoring element, the Bluetooth element, the real-time clock element and the microcontroller, the signal conditioning conversion element is connected with the threshold monitoring element, and the signal conditioning conversion element, the threshold monitoring element, the Bluetooth element and the real-time clock element are respectively connected with the microcontroller; the MEMS acceleration sensor is connected with the acquisition circuit board, the acquisition circuit board is connected with the NB-IoT wireless communication module, and the battery is connected with the acquisition circuit board and supplies power to the MEMS acceleration sensor, the acquisition circuit board and the NB-IoT wireless communication module.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a cable force monitoring device, a cable force monitoring system and a cable force monitoring method for monitoring cable force of a bridge cable.
Background
The inhaul cable is an important force transmission and stress component in a cable bridge structure, and generally comprises a stayed cable of a cable-stayed bridge, a suspension bridge and a sling (or a suspender) of an arch bridge. The safety condition of the full bridge in construction and service periods can be directly influenced by the magnitude of the cable force of the stay cable, so that the accurate measurement of the stay cable plays an important role in bridge construction control, bridge maintenance management and health monitoring in the later period.
Chinese utility model CN206450355U patent discloses a bridge cable power monitoring facilities based on NB-IoT communication, include: the system comprises an MEMS acceleration sensor, an acquisition circuit board, a lithium battery and an NB-IoT wireless communication module, wherein the acquisition circuit board consists of a signal conditioning circuit, an A/D converter, a microcontroller and a USB interface; the USB interface is connected with the computer to set parameters of the cable force monitoring device in an initial state, the microcontroller realizes acquisition control and converts acceleration data sensed by the MEMS acceleration sensor into cable force data through a built-in algorithm program, the microcontroller is connected with the NB-IoT wireless communication module, and the data are sent to the cloud network server through the NB-IoT wireless communication module.
However, the utility model discloses a bridge inhaul cable power monitoring facilities has following problem:
1. the cable force monitoring equipment is provided with the USB interface, and the cable force monitoring equipment is connected with a computer through the USB interface to set parameters of the cable force monitoring equipment, so that monitoring personnel are required to carry the computer and a data connecting line, and the cable force monitoring equipment is inconvenient to use;
2. the cable force monitoring equipment is always in the working states of cable force monitoring, data conversion and data uploading, and large power consumption is needed, so that a lithium battery needs to be replaced frequently;
3. the cloud monitoring personnel can not sense the electric quantity of the lithium battery of the cable force monitoring equipment, and once the electric quantity of the lithium battery is exhausted, the problems of cable force monitoring failure and equipment data loss can be caused.
4. The cable force monitoring equipment still can upload a large amount of data to the high in the clouds in real time under the cable force of monitoring is in normal condition, causes the high in the clouds data too much, and monitoring personnel is difficult for reading monitoring data to whether need monitoring personnel to screen cable force data judgement normal.
Therefore, it is necessary to provide a new cable force monitoring device, a cable force monitoring system and a monitoring method thereof to solve the above problems.
Disclosure of Invention
The invention provides a cable force monitoring device, a cable force monitoring system and a cable force monitoring method, which aim to realize the purposes of convenient parameter setting, timing monitoring, threshold monitoring and remote monitoring of the cable force monitoring device.
In order to achieve the above object, the present invention provides a cable force monitoring device, comprising: the system comprises an MEMS acceleration sensor, an acquisition circuit board, a battery and an NB-IoT wireless communication module, wherein the acquisition circuit board comprises a power management system, a signal conditioning conversion element, a threshold monitoring element, a Bluetooth element, a real-time clock element and a microcontroller, the power management system is connected with the signal conditioning conversion element, the threshold monitoring element, the Bluetooth element, the real-time clock element and the microcontroller, the signal conditioning conversion element is connected with the threshold monitoring element, and the signal conditioning conversion element, the threshold monitoring element, the Bluetooth element and the real-time clock element are respectively connected with the microcontroller; the MEMS acceleration sensor is connected with the acquisition circuit board, the acquisition circuit board is connected with the NB-IoT wireless communication module, and the battery is connected with the acquisition circuit board and supplies power to the MEMS acceleration sensor, the acquisition circuit board and the NB-IoT wireless communication module; the MEMS acceleration sensor collects acceleration signals in real time and transmits the acceleration signals to the signal conditioning conversion element, the signal conditioning conversion element amplifies, filters and converts the acceleration signals into acceleration data a in an analog-digital manner, the real-time clock element triggers the microcontroller to collect the acceleration data a of the signal conditioning conversion element at normal time intervals, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud; the signal conditioning conversion element also transmits the acceleration data a to the threshold monitoring element in real time, and the threshold monitoring element monitors whether the acquired acceleration data a exceeds the maximum threshold a of the acceleration datamax thresholdOr whether it is below the acceleration data minimum threshold amin thresholdWhen the monitored acceleration data a exceeds the maximum threshold value a of the acceleration datamax thresholdOr below the minimum threshold a for acceleration datamin thresholdThe threshold monitoring element to encryptThe time interval triggers the microcontroller to acquire the acceleration data a of the signal conditioning conversion element at an encryption time interval, the microcontroller converts the acceleration data a into the cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud.
Further, the bluetooth element is used for connecting with a short-range device end, and the short-range device end sets the normal time interval of the real-time clock element and the encryption time interval of the threshold monitoring element.
Furthermore, the power management system is used for monitoring the battery power, the short-range device end sets the normal time interval of battery power information collected by the power management system through the Bluetooth element, and the power management system collects battery power data at the normal time interval and transmits the battery power data to the microcontroller to be uploaded to the cloud end through the NB-IoT wireless communication module.
Further, in an initial state, the real-time clock element triggers the microcontroller to acquire acceleration data a of the signal conditioning conversion element at a certain frequency F at a normal time interval, K acceleration data a are acquired in total, and the microcontroller screens out the maximum value a of the acceleration data in the K acceleration data amaxAnd minimum value a of acceleration dataminScreening out N acceleration data maximum values a through N times of normal time intervalsmaxAnd N minimum values a of acceleration dataminAnd calculating the N maximum values a of the acceleration datamaxAverage value of (a) and N minimum values of acceleration data (a)minIs averaged to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdAnd transmitting to a threshold monitoring element.
Further, when the cable force monitoring device enters a normal real-time monitoring state, the microcontroller acquires a latest acceleration data maximum value a at each normal time intervalmaxAnd minimum value a of acceleration dataminEliminating the maximum value a of the acceleration data collected firstlymaxAnd minimum value a of acceleration dataminKeeping the maximum value a of N pieces of acceleration data in real timemaxAnd minimum value a of acceleration dataminCalculating the average value to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdThe microcontroller will calculate the maximum threshold a currentlymax thresholdAnd a minimum threshold value amin thresholdMaximum threshold a calculated above or below the initial statemax thresholdAnd a minimum threshold value amin thresholdThe numerical value under the condition of a certain percentage P is transmitted to the NB-IoT wireless communication module to be uploaded to the cloud end, and the cloud end sends a prompt to monitoring personnel whether the latest maximum threshold value a is used or notmax thresholdAnd a minimum threshold value amin thresholdThe original threshold is updated.
Furthermore, the power management system controls the signal conditioning and converting element, the threshold monitoring element and the real-time clock element to be in a real-time working state, and controls the Bluetooth element to be in a dormant state under the conditions that the Bluetooth element is not awakened by a short-range device end and the microcontroller is not triggered to acquire the acceleration data a.
The invention provides a cable force monitoring system which comprises a cable force monitoring device group consisting of a plurality of cable force monitoring devices, a short-range equipment end, a cloud end and a long-range equipment end, wherein the cable force monitoring device group comprises a plurality of cable force monitoring devices; each cable force monitoring device has the characteristics; each cable force monitoring device is installed on a cable of the cable force to be detected through a hoop, the short-range equipment end is connected with each cable force monitoring device through Bluetooth to set the initial state of each cable force monitoring device, each cable force monitoring device uploads the monitored cable force value to the cloud end, and the cable force value uploaded to the cloud end can be read through the long-range equipment end.
The invention provides a cable force monitoring method of a cable force monitoring system, which is implemented according to the following steps in sequence:
1) respectively installing a plurality of cable force monitoring devices on each cable of the cable force to be detected;
2) waking up each cable force monitoring device by using a short-range equipment end through a Bluetooth element, electrifying a MEMS acceleration sensor, a signal conditioning and converting element, a threshold monitoring element, a Bluetooth element, a real-time clock element, a microcontroller and an NB-IoT wireless communication module by using a battery of each cable force monitoring device through a power management system, and enabling each cable force monitoring device to enter a state to be configured;
3) setting a normal time interval for triggering the microcontroller by the real-time clock element and an encryption time interval for triggering the microcontroller by the threshold monitoring element by using the short-range equipment end through the Bluetooth element;
4) each cable force monitoring device enters initial data acquisition: the MEMS acceleration sensor collects acceleration signals in real time and transmits the acceleration signals to the signal conditioning and converting element, the signal conditioning and converting element amplifies, filters and converts the acceleration signals into acceleration data a, the real-time clock element triggers the microcontroller to collect the acceleration data a of the signal conditioning and converting element at a certain frequency F at a normal time interval to obtain K acceleration data a in total, and the microcontroller screens out the maximum acceleration data a in the K acceleration data amaxAnd minimum value a of acceleration dataminScreening out N acceleration data maximum values a through N times of normal time intervalsmaxAnd N minimum values a of acceleration dataminAnd calculating the N maximum values a of the acceleration datamaxAverage value of (a) and N minimum values of acceleration data (a)minIs averaged to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdTransmitting to a threshold monitoring element;
5) each cable force monitoring device enters a low-power consumption working state: the power management system controls the Bluetooth element and the microcontroller to enter a dormant state, the MEMS acceleration sensor collects acceleration signals in real time and transmits the acceleration signals to the signal conditioning and converting element, the signal conditioning and converting element amplifies and filters the acceleration signals and converts the acceleration signals into acceleration data a in an analog-to-digital mode and transmits the acceleration data a to the threshold monitoring element, and the threshold monitoring element is used for monitoring the thresholdThe monitoring element monitors whether the acquired acceleration data a exceeds the maximum threshold a of the acceleration datamax thresholdOr whether it is below the acceleration data minimum threshold amin threshold；
6) Each cable force monitoring device enters a normal real-time monitoring state: when a normal time interval is reached, the real-time clock element triggers the microcontroller to acquire acceleration data a of the signal conditioning conversion element, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud;
simultaneously, the microcontroller rejects the maximum value a of the acceleration data collected firstlymaxAnd minimum value a of acceleration dataminAdding a maximum value a of newly acquired acceleration datamaxAnd minimum value a of acceleration dataminAnd for the N acceleration data maximum values amaxAnd minimum value a of acceleration dataminCalculating the average value to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdThe microcontroller will calculate the maximum threshold a currentlymax thresholdAnd a minimum threshold value amin thresholdMaximum threshold a calculated above or below the initial statemax thresholdAnd a minimum threshold value amin thresholdThe numerical value under the condition of a certain percentage P is transmitted to the NB-IoT wireless communication module to be uploaded to the cloud end, and the cloud end sends a prompt to monitoring personnel whether the latest maximum threshold value a is used or notmax thresholdAnd a minimum threshold value amin thresholdUpdating the original threshold value;
7) the working states of the step 5) and the step 6) are sequentially repeated by each cable force monitoring device;
8) in the process of repeating to the working state of the step 5), the acceleration data a input by the signal conditioning conversion element monitored by the threshold monitoring element of a certain cable force monitoring device exceeds the maximum threshold a of the acceleration datamax thresholdOr below the minimum threshold a for acceleration datamin thresholdThe threshold monitoring element triggers the microcontroller to acquire acceleration data a of the signal conditioning conversion element at an encryption time interval, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud;
9) and the monitoring personnel consult the cable force data uploaded by each cable force monitoring device in the cloud end through the remote equipment end so as to judge whether each cable is in a normal working environment.
Further, in step 3), a short-range device end is used for setting a normal time interval for acquiring battery electric quantity data by a power management system through a bluetooth element, so that the power management system acquires the battery electric quantity at the normal time interval, in step 6), the power management system acquires the battery electric quantity data at the normal time interval and transmits the battery electric quantity data to a microcontroller, and the microcontroller transmits the battery electric quantity data to an NB-IoT wireless communication module to be uploaded to a cloud end;
k, N, M in step 4)1、M2F and the value of P in the step 6) are simultaneously set for the microcontroller through the Bluetooth element in the step 3).
Further, in the step 8), after the cable force data is uploaded to the cloud, the cloud sends a short message or a mail to the remote equipment end to alarm; step 9) is followed by a maintenance step 10), in which step 10) the respective normal time intervals, encryption time intervals, K, N, M are terminated by the remote device end1、M2F and P are maintained and modified.
The invention has the following beneficial effects: 1) the cable force monitoring device is characterized in that a Bluetooth element is arranged on an acquisition circuit board of the cable force monitoring device, after the cable force monitoring device is installed in place and is connected with the Bluetooth element on site through a short-range equipment end, the cable force monitoring device is subjected to parameter setting, and the short-range equipment end can be a portable smart phone, a tablet personal computer or a smart bracelet;
2) the power management system is arranged on the acquisition circuit board of the cable force monitoring device, and the power management system is used for controlling all elements on the acquisition circuit board, so that the Bluetooth element can be controlled to be in a dormant state under the conditions that the short-range equipment end is not awakened and the microcontroller is not triggered to acquire acceleration data a, the electric quantity is saved, and the service life of a battery is prolonged;
3) the power management system can upload the battery power information at normal time intervals for monitoring personnel to check;
4) the cable force monitoring device is characterized in that a threshold monitoring element is arranged on a collecting circuit board, the threshold monitoring element still monitors acceleration data a in real time when the cable force monitoring device is in a low-power-consumption working state, and when the acceleration data a is greatly different from the acceleration threshold, the microcontroller can be awakened and can be enabled to upload cable force data at an encrypted time interval, so that monitoring personnel can monitor the cable force of a cable in real time to remind the monitoring personnel of safety check of the cable in time;
5) under threshold value monitoring component operating condition, can not upload normal acceleration data a, reduced the too much loading of high in the clouds data, also alleviateed monitoring personnel to the screening of data, and awaken the cable force data that microcontroller uploaded after comparing through threshold value monitoring component and can directly have the warning effect to monitoring personnel.
Drawings
FIG. 1 is a schematic structural view of a cable force monitoring device according to the present invention;
FIG. 2 is a schematic structural view of the cable force monitoring device of the present invention;
FIG. 3 is a schematic view of the cable force monitoring system of the present invention;
fig. 4 is a broken line schematic diagram of K pieces of acceleration data a acquired by the cable force monitoring device at a certain frequency F each time.
In the figure: 1. a cable force monitoring device; 2. and (5) hooping.
Detailed Description
The present invention will be further described with reference to fig. 1 to 4 by way of specific embodiments.
Referring to fig. 2, the application provides a cable force monitoring device, which is used for monitoring cable force data of a bridge cable and uploading the cable force data to a cloud for monitoring personnel to check through a remote device, and when the cable force data is in a state exceeding a threshold value, the cloud can send an alarm to the remote device.
The cable force monitoring device includes: the system comprises a MEMS acceleration sensor, an acquisition circuit board, a battery and an NB-IoT wireless communication module.
The MEMS acceleration sensor is connected with the acquisition circuit board, the acquisition circuit board is connected with the NB-IoT wireless communication module, and the battery is connected with the acquisition circuit board and supplies power to the MEMS acceleration sensor, the acquisition circuit board and the NB-IoT wireless communication module.
The MEMS acceleration sensor is used for acquiring an acceleration signal on the inhaul cable.
The acquisition circuit board comprises a power management system, a signal conditioning conversion element, a threshold monitoring element, a Bluetooth element, a real-time clock element and a microcontroller, wherein the power management system is connected with the signal conditioning conversion element, the threshold monitoring element, the Bluetooth element, the real-time clock element and the microcontroller, the signal conditioning conversion element is connected with the threshold monitoring element, and the signal conditioning conversion element, the threshold monitoring element, the Bluetooth element and the real-time clock element are respectively connected with the microcontroller.
The power management system is used for controlling the switching of the power-on state and the sleep state of the signal conditioning and switching element, the threshold monitoring element, the Bluetooth element, the real-time clock element and the microcontroller so as to ensure the low-power-consumption operation of the cable force monitoring device. The power management system is also used to collect battery power data at regular intervals and transmit the battery power data to the microcontroller.
The signal conditioning and converting element is used for amplifying, filtering and converting an acceleration signal acquired by the MEMS acceleration sensor into acceleration data a in an analog-to-digital mode, and transmitting the acceleration data a to the threshold monitoring element and the microcontroller.
The threshold monitoring element is used for monitoring whether the acquired acceleration data a exceeds the maximum threshold a of the acceleration datamax thresholdOr whether it is below the acceleration data minimum threshold amin thresholdWhen the monitored acceleration data a exceeds the maximum threshold value a of the acceleration datamax thresholdOr below a minimum threshold for acceleration dataamin thresholdThe threshold monitoring element may trigger the microcontroller to transition from the sleep state to the active state at encrypted time intervals.
The real-time clock element is used for triggering the microcontroller to switch from the sleep state to the working state at regular time intervals.
The Bluetooth element is used for carrying out on-site Bluetooth connection with a short-range device end, and setting relevant configuration parameters of the power management system, the threshold monitoring element, the real-time clock element and the microcontroller through the short-range device end.
The microcontroller is used for converting the acquired acceleration data a into the cable force data through a built-in algorithm program in a working state, transmitting the cable force data to the NB-IoT wireless communication module and transmitting the battery electric quantity data input by the power supply management system to the NB-IoT wireless communication module.
The NB-IoT wireless communication module is used for uploading the acquired cable force data and battery electric quantity data to the cloud.
In the initial state of the cable force monitoring device:
1) the Bluetooth element is in Bluetooth connection with a short-range device end so as to set the normal time interval of the real-time clock element and the encryption time interval of the threshold monitoring element through the short-range device end; the short-range equipment end sets the normal time interval for the power management system to acquire the battery power information through the Bluetooth element;
2) referring to fig. 4, the real-time clock component triggers the microcontroller to acquire the acceleration data a of the signal conditioning conversion component at a certain frequency F at a normal time interval, K acceleration data a are acquired in total, and the microcontroller screens out the maximum acceleration data a in the K acceleration data amaxAnd minimum value a of acceleration dataminScreening out N acceleration data maximum values a through N times of normal time intervalsmaxAnd N minimum values a of acceleration dataminAnd calculating the N maximum values a of the acceleration datamaxAverage value of (a) and N minimum values of acceleration data (a)minIs averaged to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum acceleration dataThreshold amax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdTo a threshold monitoring element, K, N, M1、M2And F's specific numerical value accessible short range equipment end is connected the bluetooth component and is set up microcontroller, M in this application1And M2May be equal or unequal.
The working mode of the cable force monitoring device entering the normal real-time monitoring state from the initial state is as follows: the MEMS acceleration sensor collects acceleration signals in real time and transmits the acceleration signals to the signal conditioning conversion element, the signal conditioning conversion element amplifies, filters and converts the acceleration signals into acceleration data a in an analog-digital manner, the real-time clock element triggers the microcontroller to collect the acceleration data a of the signal conditioning conversion element at normal time intervals, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud;
the signal conditioning conversion element also transmits the acceleration data a to the threshold monitoring element in real time, and the threshold monitoring element monitors whether the acquired acceleration data a exceeds the maximum threshold a of the acceleration datamax thresholdOr whether it is below the acceleration data minimum threshold amin thresholdWhen the monitored acceleration data a exceeds the maximum threshold value a of the acceleration datamax thresholdOr below the minimum threshold a for acceleration datamin thresholdThe threshold monitoring element triggers the microcontroller to acquire acceleration data a of the signal conditioning conversion element at an encryption time interval, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, the NB-IoT wireless communication module uploads the acquired cable force data to the cloud, and the cloud sends short messages or mails and the like to a remote equipment end to give an alarm;
the power management system controls the signal conditioning and converting element, the threshold monitoring element and the real-time clock element to be in a real-time working state, and controls the Bluetooth element to be in a dormant state under the conditions that the Bluetooth element is not awakened by a short-range device end and the microcontroller is not triggered to acquire acceleration data a.
After the cable force monitoring device in the application enters a normal real-time monitoring state, the microcontroller acquires a latest acceleration data maximum value a at each time at normal time intervalsmaxAnd minimum value a of acceleration dataminEliminating the maximum value a of the acceleration data collected firstlymaxAnd minimum value a of acceleration dataminKeeping the maximum value a of N pieces of acceleration data in real timemaxAnd minimum value a of acceleration dataminCalculating the average value to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdThe microcontroller will calculate the maximum threshold a currentlymax thresholdAnd a minimum threshold value amin thresholdMaximum threshold a calculated above or below the initial statemax thresholdAnd a minimum threshold value amin thresholdThe numerical value under the condition of a certain percentage P is transmitted to the NB-IoT wireless communication module to be uploaded to the cloud end, and the cloud end sends a prompt to monitoring personnel whether the latest maximum threshold value a is used or notmax thresholdAnd a minimum threshold value amin thresholdThe original threshold value is updated, and the specific value of P can be set for the microcontroller by connecting a short-range device end with a Bluetooth element.
In the post-maintenance: each of the normal time interval, the encryption time interval, K, N, M, may be terminated by the remote device end1、M2And F and P are maintained and modified according to actual conditions.
Referring to fig. 1 and fig. 3, the present application further provides a cable force monitoring system, which includes a cable force monitoring device set, a short-range device end, a cloud end, and a remote device end.
The cable force monitoring device group comprises a plurality of cable force monitoring devices.
Each cable force monitoring device 1 is installed on the cable of the cable force to be measured through the hoop 2, the short-range equipment end is connected with each cable force monitoring device through the Bluetooth to carry out initial state setting on each cable force monitoring device, each cable force monitoring device uploads the cable force value of monitoring to the high in the clouds, and the cable force value uploaded to the high in the clouds can be read through the long-range equipment end.
The short-range equipment end is a smart phone, a tablet personal computer or a smart bracelet and the like with a Bluetooth connection function; the remote equipment end is a smart phone, a tablet computer, a smart bracelet or a computer and the like.
Referring to fig. 1 to 4, the present application further provides a cable force monitoring method using the cable force monitoring system, which is implemented sequentially according to the following steps:
1) respectively installing a plurality of cable force monitoring devices on each cable of the cable force to be detected;
2) waking up each cable force monitoring device by using a short-range equipment end through a Bluetooth element, electrifying a MEMS acceleration sensor, a signal conditioning and converting element, a threshold monitoring element, a Bluetooth element, a real-time clock element, a microcontroller and an NB-IoT wireless communication module by using a battery of each cable force monitoring device through a power management system, and enabling each cable force monitoring device to enter a state to be configured;
3) setting a normal time interval for triggering the microcontroller by the real-time clock element and an encryption time interval for triggering the microcontroller by the threshold monitoring element by using the short-range device end through the Bluetooth element, wherein the normal time interval is generally set to be once an hour, and the encryption time interval is set to be once a minute;
the method comprises the steps that a short-range device end is used for setting a normal time interval for a power management system to acquire battery power data through a Bluetooth element, so that the short-range device end acquires the battery power at the normal time interval, and generally, the normal time interval can be set to be one hour;
4) each cable force monitoring device enters initial data acquisition: the MEMS acceleration sensor collects acceleration signals in real time and transmits the acceleration signals to the signal conditioning and converting element, the signal conditioning and converting element amplifies, filters and converts the acceleration signals into acceleration data a, the real-time clock element triggers the microcontroller to collect the acceleration data a of the signal conditioning and converting element at a certain frequency F at a normal time interval to obtain K acceleration data a in total, and the microcontroller screens out the maximum acceleration data a in the K acceleration data amaxAnd minimum value a of acceleration dataminScreening out N acceleration data maximum values a through N times of normal time intervalsmaxAnd N minimum values a of acceleration dataminAnd calculating the N maximum values a of the acceleration datamaxAverage value of (a) and N minimum values of acceleration data (a)minIs averaged to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdTo a threshold monitoring element, K, N, M1、M2And the numerical value of F is set for the microcontroller through the Bluetooth element in the step 3);
5) each cable force monitoring device enters a low-power consumption working state: the power management system controls the Bluetooth element and the microcontroller to enter a dormant state, the MEMS acceleration sensor collects acceleration signals in real time and transmits the acceleration signals to the signal conditioning and converting element, the signal conditioning and converting element amplifies, filters and converts the acceleration signals into acceleration data a in an analog-to-digital mode and transmits the acceleration data a to the threshold monitoring element, and the threshold monitoring element monitors whether the acquired acceleration data a exceeds a maximum threshold a of the acceleration datamax thresholdOr whether it is below the acceleration data minimum threshold amin threshold；
6) Each cable force monitoring device enters a normal real-time monitoring state: when a normal time interval is reached, the real-time clock element triggers the microcontroller to acquire acceleration data a of the signal conditioning conversion element, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud;
the power management system collects battery electric quantity data at normal time intervals and transmits the battery electric quantity data to the microcontroller, and the microcontroller transmits the battery electric quantity data to the NB-IoT wireless communication module to be uploaded to the cloud;
simultaneously, the microcontroller rejects the maximum value a of the acceleration data collected firstlymaxAnd minimum value a of acceleration dataminAdding the latest miningOne acceleration data maximum a of the setmaxAnd minimum value a of acceleration dataminAnd for the N acceleration data maximum values amaxAnd minimum value a of acceleration dataminCalculating the average value to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdThe microcontroller will calculate the maximum threshold a currentlymax thresholdAnd a minimum threshold value amin thresholdMaximum threshold a calculated above or below the initial statemax thresholdAnd a minimum threshold value amin thresholdThe numerical value under the condition of a certain percentage P is transmitted to the NB-IoT wireless communication module to be uploaded to the cloud end, and the cloud end sends a prompt to monitoring personnel whether the latest maximum threshold value a is used or notmax thresholdAnd a minimum threshold value amin thresholdUpdating the original threshold, and setting the microcontroller through the Bluetooth element in the step 3) when the value of P is the same as the value of P;
7) the working states of the step 5) and the step 6) are sequentially repeated by each cable force monitoring device;
8) in the process of repeating to the working state of the step 5), the acceleration data a input by the signal conditioning conversion element monitored by the threshold monitoring element of a certain cable force monitoring device exceeds the maximum threshold a of the acceleration datamax thresholdOr below the minimum threshold a for acceleration datamin thresholdThe threshold monitoring element triggers the microcontroller to acquire acceleration data a of the signal conditioning conversion element at an encryption time interval, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, the NB-IoT wireless communication module uploads the acquired cable force data to the cloud, and the cloud sends short messages or mails and the like to a remote equipment end to give an alarm;
9) monitoring personnel consult cable force data uploaded by each cable force monitoring device in the cloud end through the remote equipment end so as to judge whether each cable is in a normal working environment;
10) post-maintenance: by means of remote devicesEnd pair each normal time interval, encryption time interval, K, N, M1、M2And F and P are maintained and modified according to actual conditions.
The invention has the following beneficial effects: 1) the cable force monitoring device is characterized in that a Bluetooth element is arranged on an acquisition circuit board of the cable force monitoring device, after the cable force monitoring device is installed in place and is connected with the Bluetooth element on site through a short-range equipment end, the cable force monitoring device is subjected to parameter setting, and the short-range equipment end can be a portable smart phone, a tablet personal computer or a smart bracelet;
2) the power management system is arranged on the acquisition circuit board of the cable force monitoring device, and the power management system is used for controlling all elements on the acquisition circuit board, so that the Bluetooth element can be controlled to be in a dormant state under the conditions that the short-range equipment end is not awakened and the microcontroller is not triggered to acquire acceleration data a, the electric quantity is saved, and the service life of a battery is prolonged;
3) the power management system can upload the battery power information at normal time intervals for monitoring personnel to check;
4) the cable force monitoring device is characterized in that a threshold monitoring element is arranged on a collecting circuit board, the threshold monitoring element still monitors acceleration data a in real time when the cable force monitoring device is in a low-power-consumption working state, and when the acceleration data a is greatly different from the acceleration threshold, the microcontroller can be awakened and can be enabled to upload cable force data at an encrypted time interval, so that monitoring personnel can monitor the cable force of a cable in real time to remind the monitoring personnel of safety check of the cable in time;
5) under threshold value monitoring component operating condition, can not upload normal acceleration data a, reduced the too much loading of high in the clouds data, also alleviateed monitoring personnel to the screening of data, and awaken the cable force data that microcontroller uploaded after comparing through threshold value monitoring component and can directly have the warning effect to monitoring personnel.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A cable force monitoring device comprising: MEMS acceleration sensor, collection circuit board, battery and NB-IoT wireless communication module, its characterized in that:
the acquisition circuit board comprises a power management system, a signal conditioning conversion element, a threshold monitoring element, a Bluetooth element, a real-time clock element and a microcontroller, wherein the power management system is connected with the signal conditioning conversion element, the threshold monitoring element, the Bluetooth element, the real-time clock element and the microcontroller;
the MEMS acceleration sensor is connected with the acquisition circuit board, the acquisition circuit board is connected with the NB-IoT wireless communication module, and the battery is connected with the acquisition circuit board and supplies power to the MEMS acceleration sensor, the acquisition circuit board and the NB-IoT wireless communication module;
the MEMS acceleration sensor collects acceleration signals in real time and transmits the acceleration signals to the signal conditioning conversion element, the signal conditioning conversion element amplifies, filters and converts the acceleration signals into acceleration data a in an analog-digital manner, the real-time clock element triggers the microcontroller to collect the acceleration data a of the signal conditioning conversion element at normal time intervals, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud;
the signal conditioning conversion element also transmits the acceleration data a to the threshold monitoring element in real time, and the threshold monitoring element monitors whether the acquired acceleration data a exceeds the maximum threshold a of the acceleration datamax thresholdOr whether it is below the acceleration data minimum threshold amin thresholdWhen the monitored acceleration data a exceeds the maximum threshold of the acceleration dataValue amax thresholdOr below the minimum threshold a for acceleration datamin thresholdAnd the threshold monitoring element triggers the microcontroller to acquire the acceleration data a of the signal conditioning conversion element at an encryption time interval, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud.
2. The cable force monitoring device of claim 1, wherein: the Bluetooth element is used for being connected with a short-range device end, and the short-range device end sets the normal time interval of the real-time clock element and the encryption time interval of the threshold monitoring element.
3. The cable force monitoring device of claim 2, wherein: the power management system is used for monitoring the battery power, the short-range device end sets the normal time interval of battery power information collected by the power management system through the Bluetooth element, and the power management system collects battery power data at the normal time interval and transmits the battery power data to the microcontroller to be uploaded to the cloud end through the NB-IoT wireless communication module.
4. The cable force monitoring device of claim 1, wherein: in an initial state, the real-time clock element triggers the microcontroller to acquire acceleration data a of the signal conditioning conversion element at a certain frequency F at a normal time interval, K acceleration data a are acquired, and the microcontroller screens out the maximum acceleration data a in the K acceleration data amaxAnd minimum value a of acceleration dataminScreening out N acceleration data maximum values a through N times of normal time intervalsmaxAnd N minimum values a of acceleration dataminAnd calculating the N maximum values a of the acceleration datamaxAverage value of (a) and N minimum values of acceleration data (a)minIs averaged to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Double croppingMaximum threshold a for acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdAnd transmitting to a threshold monitoring element.
5. The cable force monitoring device of claim 4, wherein: when the cable force monitoring device enters a normal real-time monitoring state, the microcontroller acquires a latest acceleration data maximum value a at each time at normal time intervalsmaxAnd minimum value a of acceleration dataminEliminating the maximum value a of the acceleration data collected firstlymaxAnd minimum value a of acceleration dataminKeeping the maximum value a of N pieces of acceleration data in real timemaxAnd minimum value a of acceleration dataminCalculating the average value to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdThe microcontroller will calculate the maximum threshold a currentlymax thresholdAnd a minimum threshold value amin thresholdMaximum threshold a calculated above or below the initial statemax thresholdAnd a minimum threshold value amin thresholdThe numerical value under the condition of a certain percentage P is transmitted to the NB-IoT wireless communication module to be uploaded to the cloud end, and the cloud end sends a prompt to monitoring personnel whether the latest maximum threshold value a is used or notmax thresholdAnd a minimum threshold value amin thresholdThe original threshold is updated.
6. The cable force monitoring device of claim 1, wherein: the power management system controls the signal conditioning and converting element, the threshold monitoring element and the real-time clock element to be in a real-time working state, and controls the Bluetooth element to be in a dormant state under the conditions that the Bluetooth element is not awakened by a short-range device end and the microcontroller is not triggered to acquire acceleration data a.
7. A cable force monitoring system, characterized by:
the cable force monitoring system comprises a cable force monitoring device group consisting of a plurality of cable force monitoring devices, a short-range equipment end, a cloud end and a long-range equipment end;
each cable force monitoring device has the features of any one of claims 1 to 6;
each cable force monitoring device is installed on a cable of the cable force to be detected through a hoop, the short-range equipment end is connected with each cable force monitoring device through Bluetooth to set the initial state of each cable force monitoring device, each cable force monitoring device uploads the monitored cable force value to the cloud end, and the cable force value uploaded to the cloud end can be read through the long-range equipment end.
8. A cable force monitoring method using the cable force monitoring system according to claim 7, characterized in that: the method is implemented in sequence according to the following steps:
1) respectively installing a plurality of cable force monitoring devices on each cable of the cable force to be detected;
2) waking up each cable force monitoring device by using a short-range equipment end through a Bluetooth element, electrifying a MEMS acceleration sensor, a signal conditioning and converting element, a threshold monitoring element, a Bluetooth element, a real-time clock element, a microcontroller and an NB-IoT wireless communication module by using a battery of each cable force monitoring device through a power management system, and enabling each cable force monitoring device to enter a state to be configured;
3) setting a normal time interval for triggering the microcontroller by the real-time clock element and an encryption time interval for triggering the microcontroller by the threshold monitoring element by using the short-range equipment end through the Bluetooth element;
4) each cable force monitoring device enters initial data acquisition: the MEMS acceleration sensor collects acceleration signals in real time and transmits the acceleration signals to the signal conditioning and converting element, the signal conditioning and converting element amplifies, filters and converts the acceleration signals into acceleration data a, the real-time clock element triggers the microcontroller to collect the acceleration data a of the signal conditioning and converting element at a certain frequency F at a normal time interval to obtain K acceleration data a in total, and the microcontroller screens out the maximum acceleration data a in the K acceleration data amaxAnd minimum value a of acceleration dataminAfter N times of normalizationScreening N acceleration data maximum values a at time intervalsmaxAnd N minimum values a of acceleration dataminAnd calculating the N maximum values a of the acceleration datamaxAverage value of (a) and N minimum values of acceleration data (a)minIs averaged to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as minimum threshold a of acceleration datamin thresholdTransmitting to a threshold monitoring element;
5) each cable force monitoring device enters a low-power consumption working state: the power management system controls the Bluetooth element and the microcontroller to enter a dormant state, the MEMS acceleration sensor collects acceleration signals in real time and transmits the acceleration signals to the signal conditioning and converting element, the signal conditioning and converting element amplifies, filters and converts the acceleration signals into acceleration data a in an analog-to-digital mode and transmits the acceleration data a to the threshold monitoring element, and the threshold monitoring element monitors whether the acquired acceleration data a exceeds a maximum threshold a of the acceleration datamax thresholdOr whether it is below the acceleration data minimum threshold amin threshold；
6) Each cable force monitoring device enters a normal real-time monitoring state: when a normal time interval is reached, the real-time clock element triggers the microcontroller to acquire acceleration data a of the signal conditioning conversion element, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud;
simultaneously, the microcontroller rejects the maximum value a of the acceleration data collected firstlymaxAnd minimum value a of acceleration dataminAdding a maximum value a of newly acquired acceleration datamaxAnd minimum value a of acceleration dataminAnd for the N acceleration data maximum values amaxAnd minimum value a of acceleration dataminCalculating the average value to obtain amax is flatAnd amin pingAnd with amax is flatM of (A)1Multiple as maximum threshold a of acceleration datamax thresholdAnd with amin pingM of (A)2Multiple as accelerationMinimum threshold a of degree datamin thresholdThe microcontroller will calculate the maximum threshold a currentlymax thresholdAnd a minimum threshold value amin thresholdMaximum threshold a calculated above or below the initial statemax thresholdAnd a minimum threshold value amin thresholdThe numerical value under the condition of a certain percentage P is transmitted to the NB-IoT wireless communication module to be uploaded to the cloud end, and the cloud end sends a prompt to monitoring personnel whether the latest maximum threshold value a is used or notmax thresholdAnd a minimum threshold value amin thresholdUpdating the original threshold value;
7) the working states of the step 5) and the step 6) are sequentially repeated by each cable force monitoring device;
8) in the process of repeating to the working state of the step 5), the acceleration data a input by the signal conditioning conversion element monitored by the threshold monitoring element of a certain cable force monitoring device exceeds the maximum threshold a of the acceleration datamax thresholdOr below the minimum threshold a for acceleration datamin thresholdThe threshold monitoring element triggers the microcontroller to acquire acceleration data a of the signal conditioning conversion element at an encryption time interval, the microcontroller converts the acceleration data a into cable force data through a built-in algorithm program and transmits the cable force data to the NB-IoT wireless communication module, and the NB-IoT wireless communication module uploads the acquired cable force data to the cloud;
9) and the monitoring personnel consult the cable force data uploaded by each cable force monitoring device in the cloud end through the remote equipment end so as to judge whether each cable is in a normal working environment.
9. A cable force monitoring method of a cable force monitoring system according to claim 8, characterized in that:
in step 3), setting a normal time interval for acquiring battery electric quantity data by the power management system through the Bluetooth element by using the short-range device end, so that the battery electric quantity data is acquired at the normal time interval, in step 6), acquiring the battery electric quantity data by the power management system at the normal time interval and transmitting the battery electric quantity data to the microcontroller, and transmitting the battery electric quantity data to the NB-IoT wireless communication module by the microcontroller to be uploaded to the cloud end;
in step 4)K、N、M1、M2F and the value of P in the step 6) are simultaneously set for the microcontroller through the Bluetooth element in the step 3).
10. A cable force monitoring method of a cable force monitoring system according to claim 9, characterized in that: in the step 8), after the cable force data is uploaded to the cloud end, the cloud end sends a short message or a mail to a remote equipment end to alarm; step 9) is followed by a maintenance step 10), in which step 10) the respective normal time intervals, encryption time intervals, K, N, M are terminated by the remote device end1、M2F and P are maintained and modified.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112711891A (en) * | 2021-03-26 | 2021-04-27 | 上海建工集团股份有限公司 | Construction control method for spatial cable suspension structure |
| CN113347244A (en) * | 2021-05-31 | 2021-09-03 | 湖北铁安检测技术有限公司 | Bridge health diagnosis system based on internet of things technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112711891A (en) * | 2021-03-26 | 2021-04-27 | 上海建工集团股份有限公司 | Construction control method for spatial cable suspension structure |
| CN113347244A (en) * | 2021-05-31 | 2021-09-03 | 湖北铁安检测技术有限公司 | Bridge health diagnosis system based on internet of things technology |
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