CN-120063512-B - Method and system for estimating temperature along line of driving coil of high-thrust vibrating table

CN120063512BCN 120063512 BCN120063512 BCN 120063512BCN-120063512-B

Abstract

The invention discloses a method and a system for estimating the temperature of a driving coil of a high-thrust vibrating table along the line, which are suitable for driving coil structures with water inlet at two ends and water outlet at middle, wherein temperature sensors are sequentially and equidistantly arranged on an upper layer from a water inlet to a middle water outlet along the winding direction of the driving coil, the temperature distribution condition of the upper layer is linearly fitted by monitoring the temperature values of the temperature sensors in real time, the temperature distribution of the driving coil of the lower layer is further symmetrically obtained, and the temperature rising condition of the driving coil is accurately estimated by further utilizing the temperature values of the tail end of the driving coil and the slope increment ratio of a temperature fitting curve after a period of time. The invention realizes the comprehensive monitoring of the temperature distribution along the whole driving coil and the online accurate assessment of the temperature rise condition, and provides support for guaranteeing the service performance and service life of the driving coil.

Inventors

TANG YU
ZHU ZHENCAI
Dong Aoyu
ZHANG WENJUAN
YE TENGBO
FU XIAOHONG
LU HAO
PENG YUXING
SHEN GANG
CHANG XIANGDONG

Assignees

中国矿业大学

Dates

Publication Date: 20260508
Application Date: 20250125

Claims (9)

1. The method for estimating the temperature of the driving coil of the high-thrust vibrating table along the line is characterized by comprising the following steps of: S1, dividing a driving coil of a vibrating table into an upper layer and a lower layer by a middle water outlet, sequentially arranging n temperature sensors along the winding direction of the driving coil between a water inlet and the middle water outlet of the upper layer driving coil, and recording the length of the position of the i temperature sensor from the water inlet of the upper layer driving coil as L i , wherein i=1, 2,3, and n, wherein the 1 temperature sensor is positioned at the water inlet of the upper layer driving coil, and the n temperature sensor is positioned at the middle water outlet of the driving coil; S2, monitoring temperature values of n temperature sensors of the vibration table in real time, recording the value of an ith temperature sensor as T i , dividing an upper driving coil into n-1 sections according to the arranged temperature sensors from a water inlet to a middle water outlet, and obtaining the temperature distribution condition of the upper driving coil from the water inlet to the middle water outlet by utilizing the linear fitting of measured values of two temperature sensors of each section, wherein the temperature distribution condition of the driving coil of the jth section along the line is obtained by linear fitting of the value T j of the jth temperature sensor and the value T j+1 of the jth+1 temperature sensor, and the expression is as follows: Wherein T Lj represents the temperature of a point with the length L at the water inlet of the upper layer driving coil in the j th section, j=1, 2,3, L and n-1; S3, symmetrically obtaining the temperature distribution condition of the lower layer driving coil along the line from the water inlet to the middle water outlet according to the temperature distribution condition of the upper layer driving coil along the line; S4, primarily judging the cooling effect of the driving coil, and judging whether the value T n of the nth temperature sensor meets T n ≥T max , wherein T max is the upper limit of a temperature threshold, if T n ＜T max is met, executing step S5, and if T n meets T n ≥T max , judging that the driving coil of the vibrating table has the problem of temperature overrun and has poor cooling effect; S5, at intervals of delta t, fitting again according to the operation of the steps S2-S3 to obtain the temperature distribution condition of the driving coil along the line after the delta t, wherein the expression of the temperature distribution condition of the driving coil along the line of the j-th section after the delta t is as follows: Wherein T L ′ j represents the temperature of a point with the length L at the water inlet of the upper driving coil in the j-th section after the deltat time, T j ' represents the value of the j-th temperature sensor after the deltat time, T j ′ +1 represents the j+1th temperature sensor after the deltat time, j=1, 2,3, L and n-1; s6, calculating a slope increment ratio delta k after the delta t time, wherein the calculation formula is as follows: Judging whether delta k meets delta k not less than k max , wherein k max is the upper limit of a slope increment ratio threshold, if delta k meets delta k not less than k max , judging that the driving coil of the vibrating table has hidden danger of too fast temperature rise and poor cooling effect, and if delta k is less than k max , executing the next operation; S7, judging whether delta k meets k min ＜Δk＜k max , wherein k min is the lower limit of the slope increment ratio threshold, if k min ＜Δk＜k max , judging that the temperature rise of the driving coil of the vibrating table is gentle and the cooling effect is good, and if delta k is less than or equal to k min , judging that the driving coil of the vibrating table has no hidden danger of too fast temperature rise and the cooling effect is very good.
2. The method for estimating the temperature of the driving coil of the high-thrust vibrating table along the line according to claim 1, wherein the number n of the temperature sensors is 5-10.
3. The method for estimating the temperature of the drive coil of the high-thrust vibrating table along the line according to claim 1, wherein the n temperature sensors are equidistantly arranged.
4. The method for estimating the temperature of a drive coil of a high thrust vibrating table according to claim 1, wherein the temperature sensor is a thermocouple temperature sensor.
5. The method for estimating the temperature of the driving coil of the high-thrust vibrating table along the line according to claim 1, wherein the upper limit T max of the temperature threshold is 80-120 ℃.
6. The method for estimating the temperature of the driving coil of the high-thrust vibrating table along the line according to claim 1, wherein the interval time Δt ranges from 60s to 120s.
7. The method for estimating the temperature of the driving coil of the high-thrust vibrating table along the line according to claim 1, wherein the upper limit k max of the slope increment ratio threshold is 1.6-2.
8. The method for estimating the temperature of the driving coil of the high thrust vibrating table along the line according to claim 1, wherein the slope increment ratio threshold lower limit k min is in a value range of 1.1-1.2.
9. The utility model provides a high thrust shaking table driving coil temperature estimation system along line, includes driving coil, temperature sensor and external control module, and driving coil arranges n temperature sensor along driving coil winding direction in proper order from the water inlet to middle delivery port, and 1 st temperature sensor is located upper driving coil water inlet department, and nth temperature sensor is located driving coil middle delivery port, and a plurality of temperature sensor is connected with external control module electricity through the data line respectively, its characterized in that, external control module adopts a high thrust shaking table driving coil along line temperature estimation method according to any one of claims 1~ 8.

Description

Method and system for estimating temperature along line of driving coil of high-thrust vibrating table Technical Field The invention relates to the technical field of vibrating tables, in particular to a method and a system for estimating the temperature of a driving coil of a high-thrust vibrating table along a line. Background In the technical field of modern engineering, a high-thrust vibrating table is vibrating equipment capable of generating large thrust, and is widely applied to the fields of aerospace, automobiles, electronics and the like and used for simulating the vibrating environment suffered by a product in the actual use process so as to detect the reliability and durability of the product. The driving coil of the high-thrust vibration table serves as a pivot for energy conversion, and plays a role in converting electric energy into mechanical energy for driving the vibration of the workbench. In operation, in order to generate electromagnetic forces of sufficient strength to achieve high thrust output, the drive coils need to be energized with large currents, which inevitably generate large amounts of heat inside the drive coils, which build-up of heat, if not effectively managed, will affect their performance and life. In the conventional technology, the current measurement mode can be divided into two types of contact type measurement and non-contact type measurement, wherein the contact type measurement is generally realized by embedding a thermocouple measuring point on a driving coil, and the non-contact type measurement is generally realized by installing a temperature sensor facing the driving coil in a vibrating table body. The existing measurement mode can only measure the temperature at the mounting position of the sensor, the measurement mode can only reflect the temperature at the measuring point, and as the driving coil is longer in practice and the temperature at different positions has differences, the existing measurement mode can not comprehensively reflect the temperature distribution condition of the whole driving coil, local hot spots are easily missed in the measurement process, the accurate judgment of the actual heating state of the driving coil of the high-thrust vibrating table is affected, and the operation potential safety hazard caused by inaccurate temperature monitoring exists. Disclosure of Invention Aiming at the problems, the invention provides a method for estimating the temperature of a driving coil of a high-thrust vibrating table along the line, wherein the driving coil adopts a cooling structure with water inlet at two ends and water outlet in the middle, and the method specifically comprises the following steps: Step S1, dividing a driving coil of a vibrating table into an upper layer and a lower layer by a middle water outlet, sequentially arranging n temperature sensors along the winding direction of the driving coil between a water inlet and the middle water outlet of the upper layer driving coil, and recording the length of the position of the i temperature sensor from the water inlet of the upper layer driving coil as L i, wherein i=1, 2,3, and the number n, wherein the 1 temperature sensor is positioned at the water inlet of the upper layer driving coil, and the n temperature sensor is positioned at the middle water outlet of the driving coil; S2, monitoring temperature values of n temperature sensors of a vibration table in real time, recording the value of an ith temperature sensor as T i, dividing an upper driving coil into n-1 sections according to the arranged temperature sensors from a water inlet to a middle water outlet, and obtaining the temperature distribution condition of the upper driving coil from the water inlet to the middle water outlet by utilizing the linear fitting of measured values of two temperature sensors of each section, wherein the temperature distribution condition of the driving coil of the jth section along the line is obtained by linear fitting of the value T j of the jth temperature sensor and the value T j+1 of the jth+1th temperature sensor, and the expression is as follows: Wherein T Lj represents the temperature of a point with the length L at the water inlet of the upper layer driving coil in the j th section, j=1, 2,3, L and n-1; S3, symmetrically obtaining the temperature distribution condition of the lower layer driving coil along the line from the water inlet to the middle water outlet according to the temperature distribution condition of the upper layer driving coil along the line; Step S4, primarily judging the cooling effect of the driving coil, judging whether the numerical value T n of the nth temperature sensor meets T n≥Tmax, wherein T max is the upper limit of a temperature threshold, if T n＜Tmax is met, executing step S5, and if T n meets T n≥Tmax, judging that the driving coil of the vibrating table has the problem of temperature overrun and poor cooling effect; And S5, at intervals of delta t, f