CN-122016089-A - Calibration system and calibration method for fluorescence temperature measurement demodulator

Abstract

The invention relates to the technical field of fluorescence temperature measurement, and discloses a calibration system and a calibration method for a fluorescence temperature measurement demodulator, which use a mode that the intensity of an emitted light signal changes according to a specified function to generate an optical signal of an analog fluorescence signal to replace an optical signal returned by a sensor, the photoelectric signal with intensity changing according to the function is converted into an electric signal, the demodulator analyzes the electric signal, and the error between the restored parameter and the standard parameter sent by the calibration device is corrected and used as a deviation correction value, so that the channel error of the demodulator is corrected by using the standard optical signal to realize the calibration of the demodulator.

Inventors

• SITU GUIPING
• HAN BING
• GUO YUDONG
• WU HAO

Assignees

• 南京迈通光电科技有限公司

Dates

Publication Date

20260512

Application Date

20260130

Claims (10)

1. 1. A calibration system for a fluorescence temperature demodulator, comprising a calibrated fluorescence temperature demodulator, a calibration device and an optical fiber guide beam; The optical fiber light guide beam is provided with a merging end and a branch end, the merging end is connected with an optical fiber interface of the fluorescent temperature demodulator, and the two branch ends are respectively connected to an optical signal transmitting interface and an optical signal receiving interface of the calibrating device; The fluorescent temperature demodulator is arranged to send light pulses at preset time intervals after being electrified, and enters the calibration device through the optical fiber interface, the merging end of the optical fiber light guide beam, the first branch end of the optical fiber light guide beam and the optical signal receiving interface, so that the calibration device performs synchronous control, and performs simulated fluorescent signal emission according to pulse signal triggering; The calibration device is provided with a processing unit and an analog fluorescent signal transmitting unit connected with the processing unit, wherein the processing unit is used for generating a digital instruction of an analog fluorescent signal, the analog fluorescent signal transmitting unit is used for converting an analog electric signal into an optical signal according to the digital instruction of the processing unit, outputting the analog fluorescent signal with variable light intensity according to a preset function rule, and sequentially transmitting the analog fluorescent signal to a fluorescent temperature demodulator through an optical signal transmitting interface, a first branch end and a combining end of an optical fiber light guide beam; The fluorescence temperature demodulator is arranged to analyze the received optical signal to obtain a fluorescence lifetime value, calculate the intensity of the optical signal, and return the intensity signal of the optical signal to the calibration device through the communication interface; The processing unit of the calibration device judges whether the fluorescent temperature demodulator stably obtains an optical signal according to the returned optical signal, and responds to the stable signal intensity to control and generate a standard fluorescent life value and a calibration instruction to be sent to the fluorescent temperature demodulator; and the fluorescence temperature demodulator stores the difference value between the fluorescence lifetime value obtained by analysis and the standard fluorescence lifetime value as a calibration value according to the received calibration instruction, and is used for compensating the fluorescence temperature demodulator during actual temperature detection.
2. 2. The calibration system for a fluorescence temperature modem of claim 1, wherein the calibration device has a first serial port module and serial port communication is achieved through a serial port connected to the fluorescence temperature demodulator by a communication cable.
3. 3. The calibration system for a fluorescence temperature-measuring demodulator according to claim 1, wherein the analog fluorescence signal transmitting unit includes a light emission control circuit and a light emitter, and the processing unit drives the light emitter to emit an analog fluorescence signal having a variable light intensity by controlling the light emission control circuit, the light intensity being configured to be changed according to a predetermined function law.
4. 4. The calibration system for a fluorescence temperature-measuring demodulator of claim 3, wherein the predetermined function rule is one of a sine function, an exponential function, a triangular wave, and a square wave.
5. 5. A calibration system for a fluorescence thermometry demodulator according to claim 3, wherein the light emitter is a laser generator or an LED light emitter.
6. 6. The calibration system for a fluorescence temperature measurement demodulator of claim 3, wherein the processing unit is implemented by a single chip microcomputer system, and the light-emitting circuit is driven by DAC control to control the adjustment of the emitted light intensity of the light emitter, so as to simulate an analog fluorescence signal with variable light intensity.
7. 7. The calibration system for a fluorescence temperature-measuring demodulator according to any one of claims 1 to 6, wherein the calibration device is provided with an optical signal receiving circuit including a photodiode for photoelectrically converting an optical signal received from an optical signal receiving interface to obtain an electrical signal and forming a square wave signal as a synchronization signal for triggering a processing unit via the operational amplifier circuit; And the processing unit outputs an electric signal simulating fluorescence through the DAC interface at the position where the square wave signal ends after receiving the square wave signal, drives the illuminator to generate a simulated fluorescence signal through the luminescence control circuit, and then reaches the fluorescence temperature demodulator through the optical fiber light guide beam for analysis.
8. 8. The calibration system for a fluorescence temperature modem according to any one of claims 1-6, wherein the calibration device is provided with a first collimating lens for collimating the emitted analog fluorescence signal and feeding it into the optical signal emitting interface, and a second collimating lens for collimating the optical signal returned from the optical signal receiving interface and feeding it into the photodiode.
9. 9. A method of calibrating a fluorescence thermometry demodulator based on the calibration system for a fluorescence thermometry demodulator of any of claims 1-8, the method comprising the steps of: after the system is electrified, the fluorescent temperature demodulator sends light pulses according to preset time intervals, the light pulses are transmitted into the calibrating device through the optical fiber light guide beam, and an optical signal receiving circuit of the calibrating device converts the light pulses into square wave trigger signals and transmits the square wave trigger signals to the processing unit; The processing unit generates an analog electric signal with a preset function rule through a DAC interface according to the end position of the square wave signal, the analog electric signal is amplified by the light-emitting control circuit and then drives the light emitter to emit light, the analog electric signal is converted into an analog fluorescent signal, and the analog fluorescent signal is transmitted into the fluorescent temperature demodulator through the optical fiber light guide beam; The fluorescence temperature demodulator analyzes the received analog fluorescence signal to obtain a corresponding fluorescence lifetime value and the signal intensity of the received optical signal, and the corresponding fluorescence lifetime value and the signal intensity of the received optical signal are fed back to the calibration device through serial port communication; The calibration device compares the returned signal intensity with a preset adaptation range, generates a luminous emphasis section command output through DAC control of the processing unit, adjusts the luminous intensity of the illuminator, and forms closed-loop adjustment of repeated signal generation-intensity feedback until the signal intensity is stable; After the signal intensity is stable, the calibration device sends a standard fluorescence lifetime value and a calibration instruction to the fluorescence temperature demodulator through serial port communication; and the fluorescence temperature demodulator stores the difference value between the fluorescence lifetime value obtained by analysis and the standard fluorescence lifetime value as a calibration value according to the received calibration instruction, and is used for compensating the fluorescence temperature demodulator during actual temperature detection.
10. 10. The method of calibrating a fluorescence temperature-measuring demodulator according to claim 9, wherein the predetermined function rule is one of a sine function, an exponential function, a triangular wave, and a square wave.

Description

Calibration system and calibration method for fluorescence temperature measurement demodulator Technical Field The invention relates to the technical field of fluorescence temperature measurement, in particular to a calibration system and a calibration method for a fluorescence temperature measurement demodulator. Background In the existing fluorescent temperature measurement scheme, after the demodulator and the sensor are connected, the sensor is placed in a constant-temperature oil groove, as shown in fig. 1, the oil groove is set to a specified temperature, then an upper computer sends a command to the demodulator to inform the demodulator of the current temperature of the oil groove, the corresponding fluorescent life value is calibrated, and the calibration and matching of the sensor and the demodulator are completed. In practice, however, the sensor consistency per batch is good, but the error between the channels of the demodulator is large, and in practice the calibration and matching process is mainly performed in order to complete the error calibration of the demodulator. When mass produced, each sensor and demodulator must be calibrated in this way. Production efficiency and cost can both be bigger, in addition, can be more to the input of constant temperature oil groove, and the calibration needs the longer time to heat up and cool down moreover, or a plurality of oil grooves set up different temperature points, cause the work load that the sensor carried and brings between different oil grooves. Disclosure of Invention In view of the drawbacks and deficiencies of the prior art, the present invention is directed to a calibration system and a calibration method for a fluorescence thermometry demodulator, which employ separate calibration of the demodulator and the sensor. For the calibration of the demodulator, the intensity of the emitted light signal is changed according to a specified function mode to generate an optical signal of an analog fluorescent signal, and the optical signal is used for replacing the optical signal returned by the sensor, so that a photoelectric signal with the intensity changed according to the function is received by a photodiode of the demodulator and is converted into an electric signal, the demodulator analyzes the electric signal, and then the error between the restored parameter and the standard parameter sent by the calibration device is corrected and used as a deviation correction value, thereby achieving the purpose of correcting the channel error of the demodulator by using the standard optical signal to realize the calibration of the demodulator. And for calibration of the sensor, a single fixed constant-temperature oil groove is adopted to detect consistency in the calibrated demodulator, so that pairing calibration of the sensor and the demodulator is realized, and calibration of temperature is realized. According to a first aspect of the object of the present invention, a calibration system for a fluorescence temperature demodulator is presented, comprising a fluorescence temperature demodulator to be calibrated, a calibration device and an optical fiber guide beam; The optical fiber light guide beam is provided with a merging end and a branch end, the merging end is connected with an optical fiber interface of the fluorescent temperature demodulator, and the two branch ends are respectively connected to an optical signal transmitting interface and an optical signal receiving interface of the calibrating device; The fluorescent temperature demodulator is arranged to send light pulses at preset time intervals after being electrified, and enters the calibration device through the optical fiber interface, the merging end of the optical fiber light guide beam, the first branch end of the optical fiber light guide beam and the optical signal receiving interface, so that the calibration device performs synchronous control, and performs simulated fluorescent signal emission according to pulse signal triggering; The calibration device is provided with a processing unit and an analog fluorescent signal transmitting unit connected with the processing unit, wherein the processing unit is used for generating a digital instruction of an analog fluorescent signal, the analog fluorescent signal transmitting unit is used for converting an analog electric signal into an optical signal according to the digital instruction of the processing unit, outputting the analog fluorescent signal with variable light intensity according to a preset function rule, and sequentially transmitting the analog fluorescent signal to a fluorescent temperature demodulator through an optical signal transmitting interface, a first branch end and a combining end of an optical fiber light guide beam; The fluorescence temperature demodulator is arranged to analyze the received optical signal to obtain a fluorescence lifetime value, calculate the intensity of the optical signal, and return the inte