CN215726439U - Optical fiber fluorescence temperature measurement circuit - Google Patents
Optical fiber fluorescence temperature measurement circuit Download PDFInfo
- Publication number
- CN215726439U CN215726439U CN202122044438.8U CN202122044438U CN215726439U CN 215726439 U CN215726439 U CN 215726439U CN 202122044438 U CN202122044438 U CN 202122044438U CN 215726439 U CN215726439 U CN 215726439U
- Authority
- CN
- China
- Prior art keywords
- circuit
- light signal
- optical fiber
- temperature measurement
- signal processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses an optical fiber fluorescence temperature measurement circuit which comprises an optical signal generating circuit, an optical signal processing circuit, a power supply circuit and a main controller, wherein the main controller, an exciting light generating circuit and the optical signal processing circuit are electrically connected with the power supply circuit, the main controller is electrically connected with the optical signal generating circuit so as to control the optical signal generating circuit to send exciting light signals and irradiate fluorescent substances at a to-be-measured temperature part, the optical signal generating circuit is connected with an optical path of the optical signal processing circuit and outputs exciting light to the fluorescent substances at the to-be-measured temperature part through a probe, the fluorescent substances generate fluorescence afterglow signals after the exciting light is cancelled, and the fluorescence afterglow signals are converted into electric signals and processed so as to calculate the to-be-measured temperature. The optical fiber fluorescence temperature measurement circuit provided by the utility model has the effect of solving the problem that the traditional temperature measurement method is poor in real-time performance or interference resistance.
Description
Technical Field
The utility model belongs to the technical field of switch cabinet detection, and particularly relates to an optical fiber fluorescence temperature measurement circuit.
Background
When an electric power system operates, an important link of the safety guarantee of a power grid is the safe reliability of the operation of a high-voltage switch cabinet. The switch cabinet contact is the key part of high tension switchgear, and in long-term operation in-process, the damage of contact often causes contact department temperature to rise and then the oxidation, and contact resistance increases, and the further rise of temperature, and then leads to local fusion welding, produces spark or discharge, damages electrical equipment. Therefore, the temperature of the contact of the switch cabinet is monitored in real time, the accidents are reduced, and the method has important significance on the normal operation of a power system.
According to the existing domestic and foreign temperature monitoring technology, the following four methods are mainly used for monitoring the temperature of the contact of the high-voltage switch cabinet: temperature indicating wax chip method, infrared radiation temperature measurement method, wireless sensor temperature measurement method and fluorescence optical fiber temperature measurement method.
The temperature measurement method of the temperature indicating wax sheet is a traditional method which is also the earliest method applied to temperature measurement of electrical equipment, the method can only carry out qualitative measurement, manual periodic inspection is adopted, whether the equipment is overheated or not is determined by observing the melting degree of the wax sheet, and nowadays, the method is stopped slowly due to the fact that the requirement on the reliability of a power system is increased.
Infrared thermometry is the determination of the temperature of an object by measuring an electrical signal. The system reduces the number of times the power equipment fails due to overheating. However, the infrared temperature measurement system is limited by the distance coefficient, does not have a scanning function, and cannot monitor the internal temperature of the power equipment in real time, so that the infrared temperature measurement system cannot be popularized and used.
The wireless sensor temperature measurement method utilizes a temperature sensor to measure temperature, and then sends temperature monitoring data to a monitoring center for displaying in a wireless transmission mode, so that the traditional manual regular inspection is avoided, but the system is easily influenced by strong electromagnetic interference in the environment where a switch cabinet is located, and the problem of power supply of the sensor is difficult to solve.
In summary, the conventional temperature measurement method has the problem of poor real-time performance or poor interference resistance in practical application.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, an optical fiber fluorescence temperature measuring circuit is provided, and the problem that the traditional temperature measuring method is poor in instantaneity or interference resistance is solved.
The specific technical scheme is as follows:
the utility model provides an optic fibre fluorescence temperature measurement circuit, includes light signal generating circuit, light signal processing circuit, power supply circuit and main control unit, excitation light generating circuit and light signal processing circuit all with the power supply circuit electricity is connected, main control unit with light signal generating circuit electricity is connected, in order to control light signal generating circuit sends the excitation light signal and shines to the fluorescent substance at the position of awaiting measuring the temperature, light signal generating circuit with light signal processing circuit light path is connected to gather afterglow light signal that fluorescent substance produced and export extremely after excitation light signal is closed light signal processing circuit, light signal processing circuit with main control unit's electricity is connected, and will afterglow light signal converts the signal of telecommunication into the signal of telecommunication and inputs extremely main control unit.
Further, light signal generating circuit includes probe, coupler, beam splitter, excitation light generator and drive circuit, drive circuit with power supply circuit electricity is connected, main control unit with drive circuit electricity is connected, drive circuit with excitation light generator electricity is connected, main control unit output control signal makes drive circuit drive excitation light generator produces the excitation light signal, excitation light generator with the beam splitter light path is connected, the beam splitter with the coupler light path is connected, the coupler pass through optic fibre with probe light path is connected, the beam splitter still with light signal processing circuit light path is connected, the excitation light signal passes through in order on the fluorescent substance of output to the temperature department that awaits measuring behind beam splitter, coupler, optic fibre and the probe, after the excitation light signal is closed, afterglow light signal passes through in order probe, probe, The optical fiber, the coupler and the optical splitter are received by the optical signal processing circuit.
Furthermore, the optical signal processing circuit comprises a photoelectric conversion circuit, a signal amplification circuit and a filter circuit, wherein the photoelectric conversion circuit, the signal amplification circuit and the filter circuit are all electrically connected with the power circuit, the optical splitter is connected with the photoelectric conversion circuit through an optical path, the photoelectric conversion circuit, the signal amplification circuit and the filter circuit are sequentially electrically connected, and the filter circuit is electrically connected with the signal input end of the main controller.
Furthermore, the device also comprises a reset circuit which is electrically connected with the main controller.
Further, the intelligent control system also comprises a communication circuit, wherein the communication circuit is electrically connected with the main controller, the communication circuit adopts a CC2530 wireless communication chip, and transmits signals to the display screen through a ZigBee wireless network.
In conclusion, the scheme has the beneficial effects that:
in the optical fiber fluorescence temperature measuring circuit provided by the utility model, the probe outputs the excitation light to the fluorescent substance at the position to be measured, the fluorescent substance generates a fluorescence afterglow signal after the excitation light is cancelled, and the fluorescence afterglow signal is converted into an electric signal and processed to calculate the temperature to be measured. The optical fiber fluorescence temperature measurement circuit provided by the utility model has the effect of solving the problem that the traditional temperature measurement method is poor in real-time performance or interference resistance.
Drawings
FIG. 1 is a block diagram of an optical fiber fluorescence temperature measurement circuit according to the present invention;
FIG. 2 is a detailed structural block diagram of an optical fiber fluorescence temperature measurement circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention is further illustrated by the following examples, which are not to be construed as limiting the utility model.
Fig. 1 is a structural block diagram of an optical fiber fluorescence temperature measurement circuit of the present invention, and fig. 2 is a detailed structural block diagram of an optical fiber fluorescence temperature measurement circuit of the present invention, as shown in fig. 1 and fig. 2, the optical fiber fluorescence temperature measurement circuit provided in this embodiment: including light signal generating circuit, light signal processing circuit, power supply circuit and main control unit, excitation light generating circuit and light signal processing circuit all are connected with power supply circuit electricity, main control unit is connected with light signal generating circuit electricity, in order to control light signal generating circuit to send excitation light signal and shine to the fluorescent substance of the position of awaiting measuring the temperature, light signal generating circuit and light signal processing circuit light path are connected, in order to gather the afterglow light signal that the fluorescent substance produced and export to light signal processing circuit after excitation light signal is closed, light signal processing circuit is connected with main control unit's electricity, and convert afterglow light signal into the signal of telecommunication and input to main control unit.
It should be noted that the main controller uses a chip of model STM32F 407.
Preferably, the optical signal generating circuit comprises a probe, a coupler, a light splitter, an excitation light generator and a driving circuit, the driving circuit is electrically connected with the power circuit, the main controller is electrically connected with the driving circuit, the driving circuit is electrically connected with the excitation light generator, the main controller outputs a control signal to enable the driving circuit to drive the excitation light generator to generate an excitation light signal, the excitation light generator is connected with the light splitter through a light path, the light splitter is connected with the coupler through a light path, the coupler is further connected with the optical signal processing circuit through a light path, the excitation light signal sequentially passes through the light splitter, the coupler, the optical fiber and the probe and is output to the fluorescent substance at the temperature to be measured, and when the excitation light signal is turned off, the afterglow light signal sequentially passes through the probe, the optical fiber, the coupler and the light splitter and is received by the optical signal processing circuit.
The excitation light generator generates pulse excitation light, the pulse excitation light is totally reflected after passing through the light splitter, enters the optical fiber through the coupler, is transmitted to the probe through the optical fiber excitation light, and is irradiated on the fluorescent material, and the fluorescent material is excited to generate fluorescence at the moment; after the exciting light is removed, the generated fluorescent afterglow signal passes through the same optical fiber, the coupler and the light splitter, enters the photoelectric conversion circuit, is converted into an electric signal by the optical signal and is input into the signal processing circuit.
Preferably, the optical signal processing circuit comprises a photoelectric conversion circuit, a signal amplification circuit and a filter circuit, the photoelectric conversion circuit, the signal amplification circuit and the filter circuit are all electrically connected with the power circuit, the optical splitter is connected with the photoelectric conversion circuit through an optical path, the photoelectric conversion circuit, the signal amplification circuit and the filter circuit are electrically connected in sequence, and the filter circuit is electrically connected with the signal input end of the main controller.
It should be noted that the amplification circuit amplifies the electric signal of the fluorescence afterglow, outputs the amplified electric signal to the filter circuit, and transmits the filtered signal to the main controller, so as to obtain the temperature of the object to be controlled according to the relationship between the fluorescence lifetime of the fluorescent material used and the temperature.
Preferably, the device further comprises a reset circuit, and the reset circuit is electrically connected with the main controller.
Preferably, the intelligent control system further comprises a communication circuit, the communication circuit is electrically connected with the main controller, the communication circuit adopts a CC2530 wireless communication chip, and signals are transmitted to the display screen through a ZigBee wireless network.
The working principle is as follows: the main control unit sends control signals to the drive circuit, the drive circuit drives the excitation light generator to generate excitation light signals, the excitation light signals sequentially pass through the light splitter, the coupler, the optical fibers and the probe are irradiated to fluorescent substances at positions to be measured in temperature, after the excitation light signals are turned off, the fluorescent substances generate afterglow light signals, the afterglow light signals sequentially pass through the probe, the optical fibers, the coupler and the light splitter are received by the photoelectric conversion circuit, the electric signals are converted into electric signals, the electric signals are transmitted to the main control unit through the amplifying circuit and the filter circuit, the main control unit calculates temperature values according to the sizes of the electric signals and transmits the temperature values to the display screen and an external terminal through the ZigBee wireless network to be displayed.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (5)
1. An optical fiber fluorescence temperature measurement circuit is characterized in that: including light signal generating circuit, light signal processing circuit, power supply circuit and main control unit, excitation light generating circuit and light signal processing circuit all with the power supply circuit electricity is connected, main control unit with light signal generating circuit electricity is connected, in order to control light signal generating circuit sends excitation light signal and shines to the fluorescent substance at the position of awaiting measuring the temperature, light signal generating circuit with light signal processing circuit light path is connected to gather afterglow light signal that fluorescent substance produced and export extremely at excitation light signal off the light signal processing circuit, light signal processing circuit with main control unit's electricity is connected, and will afterglow light signal converts the signal of telecommunication into the signal of telecommunication input extremely main control unit.
2. The optical fiber fluorescence temperature measurement circuit of claim 1, wherein: light signal generating circuit includes probe, coupler, beam splitter, excitation light generator and drive circuit, drive circuit with power supply circuit electricity is connected, main control unit with drive circuit electricity is connected, drive circuit with excitation light generator electricity is connected, main control unit output control signal makes drive circuit drive excitation light generator produces the excitation light signal, excitation light generator with the beam splitter light path is connected, the beam splitter with the coupler light path is connected, the coupler pass through optic fibre with probe light path is connected, the beam splitter still with light signal processing circuit light path is connected, the excitation light signal passes through in order on exporting to the fluorescent substance of the temperature department that awaits measuring behind beam splitter, coupler, optic fibre and the probe, after excitation light signal closes, afterglow light signal passes through in order probe, The optical fiber, the coupler and the optical splitter are received by the optical signal processing circuit.
3. The optical fiber fluorescence temperature measurement circuit according to claim 2, wherein: the optical signal processing circuit comprises a photoelectric conversion circuit, a signal amplification circuit and a filter circuit, wherein the photoelectric conversion circuit, the signal amplification circuit and the filter circuit are all electrically connected with the power circuit, the optical splitter is connected with a photoelectric conversion circuit light path, the photoelectric conversion circuit, the signal amplification circuit and the filter circuit are electrically connected in sequence, and the filter circuit is electrically connected with a signal input end of the main controller.
4. The optical fiber fluorescence temperature measurement circuit of claim 1, wherein: the reset circuit is electrically connected with the main controller.
5. The optical fiber fluorescence temperature measurement circuit according to any one of claims 1 to 4, wherein: the communication circuit is electrically connected with the main controller, the communication circuit adopts a CC2530 wireless communication chip and transmits signals to the display screen through a ZigBee wireless network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122044438.8U CN215726439U (en) | 2021-08-27 | 2021-08-27 | Optical fiber fluorescence temperature measurement circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122044438.8U CN215726439U (en) | 2021-08-27 | 2021-08-27 | Optical fiber fluorescence temperature measurement circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215726439U true CN215726439U (en) | 2022-02-01 |
Family
ID=80008810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122044438.8U Active CN215726439U (en) | 2021-08-27 | 2021-08-27 | Optical fiber fluorescence temperature measurement circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215726439U (en) |
-
2021
- 2021-08-27 CN CN202122044438.8U patent/CN215726439U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208255350U (en) | A kind of monitoring system using ultraviolet detector detection high-tension line corona | |
| KR101756490B1 (en) | Fiber-optic measuring apparatus | |
| CN204788718U (en) | Cubical switchboard temperature on -line monitoring device | |
| CN103398740A (en) | Real-time on-line monitoring device for monitoring abnormal operation of switch cabinet | |
| CN202141770U (en) | Cable current-carrying capacity calculating and early warning system based on distributed fiber temperature measurement | |
| CN109781266A (en) | A kind of the heating power distribution and overheating warning system of Substation Electric Equipment key position | |
| CN215726439U (en) | Optical fiber fluorescence temperature measurement circuit | |
| CN105044482B (en) | Optical fiber electric arc optical sensing device and its measuring method with temperature measurement function | |
| CN205081787U (en) | Light module parameter testing arrangement | |
| CN112255517A (en) | Local discharge and temperature combined online monitoring system of switch cabinet | |
| CN206930377U (en) | Based on narrow band laser demodulating fiber bragg grating temp measuring system | |
| CN211740563U (en) | Optical time domain reflectometer | |
| CN202511922U (en) | Oppc optical cable stress and carrying capacity measuring and calculating system | |
| CN114567254B (en) | Direct current arc automatic detection and circuit breaking system under low current level | |
| CN103698047A (en) | High-voltage electrical equipment non-contact fluorescence temperature measurement system | |
| CN106656317A (en) | OTDR light amplification device for shared light source and control method | |
| CN111028460A (en) | Cavity ring-down double-channel smoke temperature fire detection device adopting time-delay frequency division technology | |
| CN110160672A (en) | A kind of detection device of integrated RFID thermometric, transient earth voltage and ultrasound examination | |
| CN107576419A (en) | A kind of optical fiber temperature-measurement device and method | |
| CN110608812A (en) | Closed electrical equipment temperature detection system based on optical fiber detection and detection method thereof | |
| CN217213097U (en) | Transformer multi-parameter monitoring system based on distributed optical fiber sensing | |
| CN205580621U (en) | Carbon brush monitoring system | |
| CN209435224U (en) | A kind of electric power optical cable multi-path OTDR real time on-line monitoring device | |
| CN106197743A (en) | The brillouin distributed fiber optic temperature measurement system of High-low voltage switch cabinet and method | |
| CN112033574A (en) | Distributed fiber laser monitoring system and monitoring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |