Dynamic frequency point temperature measurement method based on RFID temperature sensor

Abstract

The invention discloses a dynamic frequency point temperature measurement method based on an RFID temperature sensor. The method comprises the following steps: (1) reading a temperature sensor ID; (2) activating the RFID temperature sensor; (3) starting the temperature measuring circuit: starting the digital IC temperature measuring circuit by the RFID temperature sensor to measure the temperature; (4) collecting temperature data; (5) full frequency point scanning: under the full power of the temperature sensor ID, the cable head temperature monitoring device rapidly scans the temperature data of all frequency points of the temperature sensor ID (each frequency point is progressively scanned for one time), and records a signal value in the data sent back by the RFID temperature sensor under each frequency point; (6) calculating an optimal signal value: quickly calculating the optimal signal value of the RFID temperature sensor through an insertion sorting algorithm; and (7) determining an optimal frequency point: finding out the optimal frequency point with the optimal signal value in the current state according to the calculated optimal signal value, recording the frequency point value, and confirming the frequency point value as an optimal data acquisition scheme of the RFID temperature sensor.

Description

Technical Field

[0001] The invention relates to the technical field of cable head temperature monitoring of a switch cabinet, and in particular to a dynamic frequency point temperature measurement method based on an RFID temperature sensor. Background Art

[0002] The current RFID technology temperature sensor acquisition method is mostly fixed frequency, fixed power. In practical applications, due to the different installation positions and angles of the RFID radio frequency antenna, as well as the different positions and directions of the internal sensing IC (integrated circuit) of the temperature sensor, the RFID radio frequency antenna often fails to receive part of the temperature sensor data, or even sometimes completely fails to receive the temperature sensor data, resulting in incomplete or missing data, making it difficult for maintenance personnel to accurately determine the status of the cable head, increasing the difficulty and cost of maintenance, and thus making the entire cable head temperature monitoring system ineffective, unable to detect abnormal temperature of the cable head in time, thereby increasing safety hazards. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a dynamic frequency temperature measurement method based on RFID temperature sensor. This dynamic frequency temperature measurement method based on RFID temperature sensor can dynamically adjust the frequency and power of RFID radio frequency antenna for temperature sensors in different positions, so that the cable head temperature monitoring device can read the data of the temperature sensor while achieving power consumption optimization.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: A dynamic frequency point temperature measurement method based on RFID temperature sensor, characterized by comprising the following steps: (1) Read the temperature sensor ID: read the temperature sensor ID configured inside the RFID temperature sensor through the cable head temperature monitoring device; (2) Activate the RFID temperature sensor: After reading the corresponding temperature sensor ID, based on the RFID radio frequency identification technology, the RFID radio frequency antenna sends radio frequency waves of the international Internet of Things standard to activate the RFID temperature sensor; (3) Start the temperature measurement circuit: The RFID temperature sensor starts the digital IC temperature measurement circuit to measure the temperature; (4) Collecting temperature data: The cable head temperature monitoring device receives the temperature data transmitted by the RFID temperature sensor through the RFID radio frequency antenna. The RFID temperature sensor transmits temperature data using wireless radio frequency waves. (5) Full frequency scanning: When the temperature sensor ID is at full power, the cable head temperature monitoring device quickly scans the temperature data of all frequency points of the temperature sensor ID (scanning each frequency point incrementally once), and records the signal value in the data sent back by the RFID temperature sensor at each frequency point; (6) Calculate the optimal signal value: quickly calculate the optimal signal value of the RFID temperature sensor through the insertion sort algorithm; (7) Determine the optimal frequency point: Based on the calculated optimal signal value, find the optimal frequency point with the best signal value in the current state, and record the frequency point value to confirm it as the optimal data collection solution for the RFID temperature sensor.

[0005] In the preferred solution, in step (7), under the optimal frequency point, the cable head temperature monitoring device performs a full-power scan on the temperature data of all powers of the temperature sensor ID (scanning each power point in descending order quickly), records the signal value in the data sent by the RFID temperature sensor to the cable head temperature monitoring device at each current power point, calculates the optimal signal value through a bubble sort algorithm, and then retrieves the power value under the optimal signal value, selects the power value with the minimum and optimal power and records it, and confirms it as the optimal data collection solution for the RFID temperature sensor.

[0006] In a further preferred embodiment, in step (7), when the power value is at the minimum and optimal state, the cable head temperature monitoring device dynamically adjusts the frequency and power of the RFID radio frequency antenna according to the frequency and power values ​​recorded corresponding to the currently collected temperature sensor ID, and confirms the optimal data collection solution for the RFID temperature sensor.

[0007] In the preferred embodiment, the dynamic frequency temperature measurement method based on RFID temperature sensor adopts a cable head temperature monitoring system to realize dynamic frequency temperature measurement. The cable head temperature monitoring system includes a cable head temperature monitoring device, at least one RFID radio frequency antenna, at least one RFID temperature sensor, a display terminal, a host computer and a cloud platform. The RFID radio frequency antenna is arranged on the cable head temperature monitoring device and is electrically connected to the control signal input end of the cable head temperature monitoring device. The RFID temperature sensor is installed on the cable head and connected to the RFID radio frequency antenna via wireless data transmission; the cable head temperature monitoring device is connected to the display terminal via wireless data transmission; the cable head temperature monitoring device is connected to the host computer via wired data transmission, and the host computer is connected to the cloud platform via wireless data transmission.

[0008] The cable head temperature monitoring device is used to receive the temperature data collected by the RFID temperature sensor and send it to the cloud platform and display terminal after corresponding processing.

[0009] The RFID radio frequency antenna is used to wirelessly collect temperature data from the RFID temperature sensor. The number of RFID radio frequency antennas is the same as that of RFID temperature sensors and they correspond one to one.

[0010] The RFID temperature sensor is used to automatically measure the temperature of the cable head and record the temperature of the cable head in real time.

[0011] The above-mentioned display terminal is used to display the temperature data obtained by the cable head temperature monitoring device.

[0012] The host computer is used to receive the temperature data sent by the cable head temperature monitoring device and send it wirelessly to the cloud platform.

[0013] The cloud platform is used to remotely obtain the temperature data sent by the cable head temperature monitoring device for analysis, judgment and display.

[0014] During monitoring, first attach the RFID temperature sensor with set parameters such as start time, temperature measurement time interval, high and low temperature alarm, etc. to the cable head; the chip in the RFID temperature sensor will automatically measure the temperature according to the set program and record it in the chip, and no human intervention is required during the entire transportation process; then, the cable head temperature monitoring device wirelessly collects the temperature data on the RFID temperature sensor through the RFID radio frequency antenna, which is very good at isolating high voltage and low voltage to increase safety; then, the cable head temperature monitoring device can send the temperature data to the display terminal through near-field wireless data transmission, and the display terminal can display the acquired temperature data, greatly improving the safety of operation and maintenance; the cable head temperature monitoring device can also send the temperature data to the host computer through wired data transmission, and the host computer sends the acquired temperature data to the cloud platform through wireless transmission; finally, the operation and maintenance personnel can remotely obtain the temperature data of the equipment through the cloud platform and the temperature data of the equipment obtained by wireless near-field, conduct analysis and judgment, and quickly and conveniently diagnose the health of the equipment.

[0015] The above-mentioned cable head temperature monitoring device is modularized as a whole. If the currently used cable head temperature monitoring device A fails, it can be directly replaced on-site with the cable head temperature monitoring device B and the device can be connected to the network without too complicated local and cloud platform joint debugging and networking steps, realizing plug-and-play and data interconnection functions.

[0016] The above wireless data transmission method can be a public network wireless transmission method or a private network wireless transmission method. Public network wireless transmission methods include GPRS, 2G, 3G, 4G, and 5G, which transmit data through mobile communication networks. Private network wireless transmission methods include MDS data transmission radio, WiFi, ZigBee, Bluetooth, etc., which are suitable for data transmission in specific areas or with specific needs.

[0017] The wired data transmission method may be parallel transmission, serial transmission, twisted pair transmission, coaxial cable transmission or optical fiber transmission.

[0018] In a further preferred embodiment, the cable head temperature monitoring device is provided with four interfaces, the first interface is connected to the RFID radio frequency antenna through an RFID reader / writer, the second interface is connected to the display terminal through a Bluetooth communication unit, the third interface is connected to the host computer through an RS485 communication unit, and the fourth interface is connected to the host computer through an RJ45 communication unit, and the host computer is connected to the cloud platform through LTE wireless communication.

[0019] Compared with the prior art, the present invention has the following advantages: The present invention can dynamically adjust the frequency and power algorithm of the RFID radio frequency antenna for temperature sensors at different positions. Through real-time adjustment, the cable head temperature monitoring device can read the data of the temperature sensor while achieving power consumption optimization, thereby improving the reliability and accuracy of RFID temperature sensor data collection, thereby ensuring the effectiveness and safety of the cable head temperature monitoring system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a system architecture diagram of a specific embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following is a further description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0022] like Figure 1 As shown, the dynamic frequency point temperature measurement method based on the RFID temperature sensor in this embodiment includes the following steps: (1) Read the temperature sensor ID: read the temperature sensor ID configured inside the RFID temperature sensor through the cable head temperature monitoring device; (2) Activate the RFID temperature sensor: After reading the corresponding temperature sensor ID, based on the RFID radio frequency identification technology, the RFID radio frequency antenna sends radio frequency waves of the international Internet of Things standard to activate the RFID temperature sensor; (3) Start the temperature measurement circuit: The RFID temperature sensor starts the digital IC temperature measurement circuit to measure the temperature; (4) Collecting temperature data: The cable head temperature monitoring device receives the temperature data transmitted by the RFID temperature sensor through the RFID radio frequency antenna. The RFID temperature sensor transmits temperature data using wireless radio frequency waves. (5) Full frequency scanning: When the temperature sensor ID is at full power, the cable head temperature monitoring device quickly scans the temperature data of all frequency points of the temperature sensor ID (scanning each frequency point incrementally once), and records the signal value in the data sent back by the RFID temperature sensor at each frequency point; (6) Calculate the optimal signal value: quickly calculate the optimal signal value of the RFID temperature sensor through the insertion sort algorithm; (7) Determine the optimal frequency point: Based on the calculated optimal signal value, find the optimal frequency point with the best signal value in the current state, and record the frequency point value to confirm it as the optimal data collection solution for the RFID temperature sensor.

[0023] In step (7), under the state of the optimal frequency point, the cable head temperature monitoring device performs a full-power scan on the temperature data of all powers of the temperature sensor ID (scanning each power point in descending order quickly), records the signal value in the data sent by the RFID temperature sensor to the cable head temperature monitoring device at each current power point, calculates the optimal signal value through a bubble sort algorithm, and then retrieves the power value under the optimal signal value, selects the power value with the minimum and optimal power and records it, and confirms it as the optimal data collection solution for the RFID temperature sensor.

[0024] In step (7), when the power value is at the minimum and optimal state, the cable head temperature monitoring device dynamically adjusts the frequency and power of the RFID radio frequency antenna according to the frequency and power values ​​recorded corresponding to the currently collected temperature sensor ID, and confirms the optimal data collection solution for the RFID temperature sensor.

[0025] This dynamic frequency point temperature measurement method based on RFID temperature sensor adopts a cable head temperature monitoring system to realize dynamic frequency point temperature measurement. The cable head temperature monitoring system includes a cable head temperature monitoring device, multiple RFID radio frequency antennas, multiple RFID temperature sensors, a display terminal, a host computer and a cloud platform. Each RFID radio frequency antenna is arranged on the cable head temperature monitoring device and is electrically connected to the control signal input end of the cable head temperature monitoring device. Each RFID temperature sensor is respectively installed on the corresponding cable head and connected to the corresponding RFID radio frequency antenna through wireless data transmission; the cable head temperature monitoring device is connected to the display terminal through wireless data transmission; the cable head temperature monitoring device is connected to the host computer through wired data transmission, and the host computer is connected to the cloud platform through wireless data transmission.

[0026] The cable head temperature monitoring device is used to receive the temperature data collected by the RFID temperature sensor and send it to the cloud platform and display terminal after corresponding processing.

[0027] The RFID radio frequency antenna is used to wirelessly collect temperature data from the RFID temperature sensor. The number of RFID radio frequency antennas is the same as that of RFID temperature sensors and they correspond one to one.

[0028] The RFID temperature sensor is used to automatically measure the temperature of the cable head and record the temperature of the cable head in real time.

[0029] The above-mentioned display terminal is used to display the temperature data obtained by the cable head temperature monitoring device.

[0030] The host computer is used to receive the temperature data sent by the cable head temperature monitoring device and send it wirelessly to the cloud platform.

[0031] The cloud platform is used to remotely obtain the temperature data sent by the cable head temperature monitoring device for analysis, judgment and display.

[0032] During monitoring, first attach the RFID temperature sensor with set parameters such as start time, temperature measurement time interval, high and low temperature alarm, etc. to the cable head; the chip in the RFID temperature sensor will automatically measure the temperature according to the set program and record it in the chip, and no human intervention is required during the entire transportation process; then, the cable head temperature monitoring device wirelessly collects the temperature data on the RFID temperature sensor through the RFID radio frequency antenna, which is very good at isolating high voltage and low voltage to increase safety; then, the cable head temperature monitoring device can send the temperature data to the display terminal through near-field wireless data transmission, and the display terminal can display the acquired temperature data, greatly improving the safety of operation and maintenance; the cable head temperature monitoring device can also send the temperature data to the host computer through wired data transmission, and the host computer sends the acquired temperature data to the cloud platform through wireless transmission; finally, the operation and maintenance personnel can remotely obtain the temperature data of the equipment through the cloud platform and the temperature data of the equipment obtained by wireless near-field, conduct analysis and judgment, and quickly and conveniently diagnose the health of the equipment.

[0033] The above-mentioned cable head temperature monitoring device is modularized as a whole. If the currently used cable head temperature monitoring device A fails, it can be directly replaced on-site with the cable head temperature monitoring device B and the device can be connected to the network without too complicated local and cloud platform joint debugging and networking steps, realizing plug-and-play and data interconnection functions.

[0034] The above wireless data transmission method can be a public network wireless transmission method or a private network wireless transmission method. Public network wireless transmission methods include GPRS, 2G, 3G, 4G, and 5G, which transmit data through mobile communication networks. Private network wireless transmission methods include MDS data transmission radio, WiFi, ZigBee, Bluetooth, etc., which are suitable for data transmission in specific areas or with specific needs.

[0035] The wired data transmission method may be parallel transmission, serial transmission, twisted pair transmission, coaxial cable transmission or optical fiber transmission.

[0036] The cable head temperature monitoring device is provided with four interfaces, the first interface is connected to the RFID radio frequency antenna through an RFID reader / writer, the second interface is connected to the display terminal through a Bluetooth communication unit, the third interface is connected to the host computer through an RS485 communication unit, and the fourth interface is connected to the host computer through an RJ45 communication unit. The host computer is connected to the cloud platform through LTE wireless communication.

[0037] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. The technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A dynamic frequency point temperature measurement method based on RFID temperature sensor, characterized in that The steps include: (1) Read the temperature sensor ID: read the temperature sensor ID configured inside the RFID temperature sensor through the cable head temperature monitoring device; (2) Activate the RFID temperature sensor: After reading the corresponding temperature sensor ID, based on the RFID radio frequency identification technology, the RFID radio frequency antenna sends radio frequency waves of the international Internet of Things standard to activate the RFID temperature sensor; (3) Start the temperature measurement circuit: The RFID temperature sensor starts the digital IC temperature measurement circuit to measure the temperature; (4) Collecting temperature data: The cable head temperature monitoring device receives the temperature data transmitted by the RFID temperature sensor through the RFID radio frequency antenna. The RFID temperature sensor transmits temperature data using wireless radio frequency waves. (5) Full frequency scanning: When the temperature sensor ID is at full power, the cable head temperature monitoring device quickly scans the temperature data of all frequency points of the temperature sensor ID and records the signal value in the data sent back by the RFID temperature sensor at each frequency point; (6) Calculate the optimal signal value: quickly calculate the optimal signal value of the RFID temperature sensor through the insertion sort algorithm; (7) Determine the optimal frequency point: Based on the calculated optimal signal value, find the optimal frequency point with the best signal value in the current state, and record the frequency point value to confirm it as the optimal data collection solution for the RFID temperature sensor.

2. The dynamic frequency point temperature measurement method based on RFID temperature sensor as claimed in claim 1, characterized in that: In step (7), under the state of the optimal frequency point, the cable head temperature monitoring device performs a full-power scan on the temperature data of all powers of the temperature sensor ID, records the signal value in the data sent by the RFID temperature sensor to the cable head temperature monitoring device at each current power point, calculates the optimal signal value through a bubble sort algorithm, and then retrieves the power value under the optimal signal value, selects the power value with the minimum and optimal power and records it, and confirms it as the optimal data collection solution for the RFID temperature sensor.

3. The dynamic frequency point temperature measurement method based on RFID temperature sensor as claimed in claim 2, characterized in that: In step (7), when the power value is at the minimum and optimal state, the cable head temperature monitoring device dynamically adjusts the frequency and power of the RFID radio frequency antenna according to the frequency and power values ​​recorded corresponding to the currently collected temperature sensor ID, and confirms the optimal data collection solution for the RFID temperature sensor.

4. The dynamic frequency point temperature measurement method based on RFID temperature sensor as claimed in claim 1, characterized in that: A cable head temperature monitoring system is used to realize dynamic frequency point temperature measurement. The cable head temperature monitoring system includes a cable head temperature monitoring device, at least one RFID radio frequency antenna, at least one RFID temperature sensor, a display terminal, a host computer and a cloud platform. The RFID radio frequency antenna is arranged on the cable head temperature monitoring device and is electrically connected to the control signal input end of the cable head temperature monitoring device. The RFID temperature sensor is installed on the cable head and connected to the RFID radio frequency antenna through wireless data transmission; the cable head temperature monitoring device is connected to the display terminal through wireless data transmission; the cable head temperature monitoring device is connected to the host computer through wired data transmission, and the host computer is connected to the cloud platform through wireless data transmission.

5. The dynamic frequency point temperature measurement method based on RFID temperature sensor as claimed in claim 4, characterized in that: The cable head temperature monitoring device is provided with four interfaces, the first interface is connected to the RFID radio frequency antenna through an RFID reader / writer, the second interface is connected to the display terminal through a Bluetooth communication unit, the third interface is connected to the host computer through an RS485 communication unit, and the fourth interface is connected to the host computer through an RJ45 communication unit. The host computer is connected to the cloud platform through LTE wireless communication.

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