Gas turbine combustion pulse signal processing equipment

Abstract

The utility model relates to the technical field of gas turbine measurement signal processing, in particular to gas turbine combustion pulsation signal processing equipment which comprises a pulsation signal processing device, at least one sensor, safety barriers and signal conditioners, wherein the safety barriers and the signal conditioners are connected with the sensors in a one-to-one correspondence mode. The pulse signal processing device comprises an FPGA (Field Programmable Gate Array) processor and signal input circuits corresponding to the signal conditioners; each signal input circuit comprises a filter and an analog-to-digital converter which are connected in sequence; the analog-to-digital converter is respectively connected with the FPGA processor; the sensor is used for collecting charge signals, and the charge signals are sent to the pulse signal processing device after being processed by the safety barrier and the signal conditioner. Through the signal processing equipment, the requirements of high temperature resistance, safety isolation, signal sensitivity and the like can be met, the accuracy rate of signal analysis is high, serious accidents of combustion vibration damage of the gas turbine combustor are prevented, and the service life of the gas turbine combustor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbine measurement signal processing, in particular to a gas turbine combustion pulsation signal processing device. Background Art

[0002] The working process of gas turbine burners is characterized by high temperature, high speed, high combustion heat intensity, high excess air coefficient, and dramatic changes in operating parameters. If the ratio of fuel to air is not well matched, unstable combustion and combustion vibration are prone to occur. Low-frequency vibration is prone to flameout, and high-frequency vibration will damage the burner in an instant, causing huge economic losses. Therefore, taking effective measures to monitor the combustion pulsation of gas turbines and process related signals can increase the life of gas turbine burners and prevent serious accidents caused by burner combustion vibration damage, which is of great significance to the safe operation of gas turbines.

[0003] In the prior art, a Chinese invention patent document with a publication number of CN101806240A and a publication date of August 18, 2010 is proposed. The technical solution disclosed in the patent document is as follows: a detection device and a detection method for a combustion phase of a homogeneous charge compression ignition engine, which comprises: a speed sensor, which collects a speed signal of a flywheel of the engine; a camshaft position sensor, which collects a camshaft phase of the engine; an acceleration sensor, which collects a vibration signal of the engine; a charge amplifier, which converts the collected engine vibration signal from a charge signal into a voltage signal; a data acquisition device, which performs analog-to-digital conversion on the input flywheel speed signal, camshaft phase and vibration signal of the engine; a host computer, which calibrates the combustion analysis window and the combustion characteristic frequency band of the engine according to the digital signals of the flywheel speed signal, camshaft phase and vibration signal of the engine after analog-to-digital conversion; and a combustion analysis control unit, which collects the vibration signal of the engine according to the combustion analysis window, filters the engine vibration signal within the combustion characteristic frequency band, and then calculates the combustion phase of the engine.

[0004] In actual use, the above technical solutions cannot meet the requirements of burner combustion pulsation monitoring of gas turbines in terms of high temperature resistance, safety isolation, signal sensitivity and signal analysis. Summary of the invention

[0005] In order to solve the above technical problems, the utility model proposes a gas turbine combustion pulsation signal processing device, which can meet the requirements of high temperature resistance, safety isolation and signal sensitivity, and has high accuracy of signal analysis.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] A gas turbine combustion pulsation signal processing device comprises a pulsation signal processing device, at least one sensor, and a safety gate and a signal conditioner connected to each sensor in a one-to-one correspondence; the pulsation signal processing device comprises an FPGA processor and a signal input circuit corresponding to each signal conditioner, each signal input circuit comprises a filter and an analog-to-digital converter connected in sequence; the analog-to-digital converters are respectively connected to the FPGA processor; the sensor is used to collect charge signals, which are processed by the safety gate and the signal conditioner and then sent to the pulsation signal processing device.

[0008] The sensors include a pressure fluctuation sensor and an acceleration sensor.

[0009] The pressure fluctuation sensor and the acceleration sensor are made of high-temperature piezoelectric crystals.

[0010] The pressure fluctuation sensor and the acceleration sensor are respectively installed on the gas turbine combustor.

[0011] The output sensitivity of the signal conditioner is 12.5mV / kpa and 12.5mV / g respectively; the FPGA processor is used for signal analysis, and the analysis frequency is divided into 5 frequency bands.

[0012] The pulsation signal processing device also includes a first output circuit corresponding to each sensor; the first output circuit includes a first isolator, a digital-to-analog converter and an analog output module connected in sequence, and the first isolator is connected to the FPGA processor.

[0013] The pulsation signal processing device also includes a second output circuit corresponding to each sensor; the second output circuit includes a second isolator and a digital output module connected in sequence, and the second isolator is connected to the FPGA processor.

[0014] Each sensor is correspondingly provided with six second output circuits, including one output alarm circuit, two redundant output load reduction circuits and three redundant output shutdown circuits.

[0015] The pulse signal processing device also includes a data communication port and a debugging and maintenance port.

[0016] It also includes two redundant power supply circuits.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. In the utility model, the charge induced by each sensor is sent to the pulsation signal processing device through the safety gate and the signal conditioner, and the pulsation signal processing device is output after filtering, analog-to-digital conversion and FPGA processor. Since the signal processing device is used for monitoring the combustion pulsation of gas turbines, a safety gate is set between the signal conditioner and the sensor, so that the sensor can be installed in a dangerous explosion-proof area, the signal sensitivity is high, and the detection result is more accurate. At the same time, the safety gate and the signal conditioner can be installed in a non-hazardous area to effectively electrically isolate the signal and improve the overall reliability of the equipment.

[0019] In the utility model, charge input is adopted, sine wave voltage is output, and then FPGA processor is adopted for analysis, so the signal analysis effect is good. A filtering function is provided in the input process to remove "interference" in the signal and improve the accuracy of signal analysis.

[0020] 2. Compared with the prior art method of using an acceleration sensor to collect engine vibration and using the engine's flywheel speed signal, camshaft phase, engine vibration, and energy function fitting to obtain the engine combustion phase, the structural design of the utility model allows the utility model to directly use a pressure fluctuation sensor to detect the combustion pressure pulsation in the burner and use an acceleration sensor to measure the acceleration of the burner housing. The signal has high accuracy and good real-time performance.

[0021] 3. The pressure fluctuation sensor and acceleration sensor are made of high-temperature piezoelectric crystals, which have long service life and high temperature resistance. They are particularly suitable for monitoring gas turbine combustion pulsation, so that the pressure fluctuation sensor and acceleration sensor can be installed on the gas turbine burner, the measurement results are more accurate, and the installation and disassembly are also more convenient.

[0022] 4. The output sensitivity of the signal conditioner is 12.5mV / kpa and 12.5mV / g; the FPGA processor is used for signal analysis, the analysis frequency is divided into 5 frequency bands, the signal frequency analysis range is wide, and the analysis accuracy is high.

[0023] 5. In the utility model, the digital output load reduction signal adopts double redundancy, and the shutdown signal adopts triple redundancy, which improves the reliability of the gas turbine combustion pulsation signal processing device.

[0024] 6. In the present invention, the power supply circuit adopts dual redundancy, and the power supply circuit is reliable.

[0025] 7. In the present invention, the data communication port can be used to communicate the full-frequency data of the combustion pulsation of the gas turbine to the gas turbine control system TCS, and is used for the gas turbine control system TCS screen monitoring. The debugging and maintenance port can be used for the parameter setting, data storage, logic download and other functions of the combustion pulsation signal processing device, so as to meet the monitoring and protection of the combustion pulsation signal of the gas turbine, and facilitate maintenance and debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementations, wherein:

[0027] Figure 1 It is a schematic diagram of the principle of the utility model;

[0028] Figure 2 This is a schematic diagram of the pressure fluctuation signal processing flow in the utility model;

[0029] Figure 3 This is a schematic diagram of the acceleration signal processing flow in the utility model;

[0030] Markings in the figure:

[0031] 1. Pulsation signal processing device, 2. Safety barrier, 3. Pressure fluctuation signal conditioner, 4. FPGA processor, 5. Filter, 6. Analog-to-digital converter, 7. Pressure fluctuation sensor, 8. Acceleration sensor, 9. First isolator, 10. Digital-to-analog converter, 11. Analog output module, 12. Second isolator, 13. Digital output module, 14. Analog input module, 15. Data communication port, 16. Debugging and maintenance port, 17. Acceleration signal conditioner, 18. CPU central processing unit. DETAILED DESCRIPTION

[0032] Example 1

[0033] As a basic implementation mode of the utility model, the utility model includes a gas turbine combustion pulsation signal processing device, including a pulsation signal processing device 1, a sensor, and a safety gate 2 and a signal conditioner connected to the sensor. Among them, the sensor can be a pressure fluctuation sensor 7 or an acceleration sensor 8. The pulsation signal processing device 1 includes an FPGA processor 4 and a signal input circuit corresponding to the signal conditioner. The signal input circuit includes an analog input module 14, a filter 5 and an analog-to-digital converter 6 connected in sequence. The analog-to-digital converters 6 are respectively connected to the FPGA processor 4. The sensor is used to collect charge signals, which are processed by the safety gate 2 and the signal conditioner and then sent to the pulsation signal processing device 1. After filtering, analog-to-digital conversion, and processing by the FPGA processor 4 in the pulsation signal processing device 1, the processed signal is sent out.

[0034] Example 2

[0035] As a preferred embodiment of the utility model, the utility model includes a gas turbine combustion pulsation signal processing device, including a pulsation signal processing device 1, two sensors, and a safety gate 2 and a signal conditioner respectively connected to the two sensors in a one-to-one correspondence. Among them, the sensor includes a pressure fluctuation sensor 7 and an acceleration sensor 8, and the two signal conditioners are a pressure fluctuation signal conditioner 3 and an acceleration signal conditioner 17. Furthermore, the pressure fluctuation sensor 7 and the acceleration sensor 8 are made of high-temperature piezoelectric crystals, so that the pressure fluctuation sensor 7 and the acceleration sensor 8 have a temperature tolerance of not less than 520°C. The pressure fluctuation sensor 7 and the acceleration sensor 8 are respectively installed on the gas turbine combustor. Among them, the two safety gates 2 are respectively arranged between the sensor and the signal conditioner, and the safety gate 2, the pressure fluctuation signal conditioner 3 and the acceleration signal conditioner 17 are all installed in a non-hazardous area to effectively electrically isolate the signal and improve the reliability of the overall equipment.

[0036] The pulsation signal processing device 1 includes an FPGA processor 4 and two signal input circuits. Each signal input circuit includes an analog input module 14, a filter 5 and an analog-to-digital converter 6 connected in sequence. One of the analog input modules 14 in the two signal input circuits is connected to the pressure fluctuation signal conditioner 3, and the other is connected to the acceleration signal conditioner 17. The two analog-to-digital converters 6 are respectively connected to the FPGA processor 4.

[0037] The pressure fluctuation sensor 7 transmits the charge signal to the pressure fluctuation signal conditioner 3 through the safety gate 2. After signal conditioning, the pressure fluctuation signal conditioner 3 converts the charge signal into a voltage signal and sends it to the pulsation signal processing device 1. The acceleration sensor 8 transmits the charge signal to the acceleration signal conditioner 17 through the safety gate 2. After signal conditioning, the acceleration signal conditioner 17 converts the charge signal into a voltage signal and sends it to the pulsation signal processing device 1. After filtering, analog-to-digital conversion, and processing by the FPGA processor 4 in the pulsation signal processing device 1, the processed signal is sent out.

[0038] Example 3

[0039] As another preferred embodiment of the utility model, the utility model includes a gas turbine combustion pulsation signal processing device, including a pulsation signal processing device 1, at least one sensor, and a safety gate 2 and a signal conditioner connected to each sensor in a one-to-one correspondence. The pulsation signal processing device 1 includes an FPGA processor 4 and a signal input circuit corresponding to each signal conditioner, and each signal input circuit includes a filter 5 and an analog-to-digital converter 6 connected in sequence. The analog-to-digital converter 6 is connected to the FPGA processor 4 respectively. The sensor is used to collect charge signals, which are processed by the safety gate 2 and the signal conditioner and then sent to the pulsation signal processing device 1. The pulsation signal processing device 1 is filtered, converted into analogues, and processed by the FPGA processor 4 before outputting the signal.

[0040] Specifically, the pulsation signal processing device 1 also includes a first output circuit and a second output circuit corresponding to each sensor. The first output circuit includes a first isolator 9, a digital-to-analog converter 10, and an analog output module 11 connected in sequence. The first isolator 9 is connected to the FPGA processor 4, and finally sends an analog signal to the gas turbine control system TCS for screen display. The second output circuit includes a second isolator 12 and a digital output module 13 connected in sequence. The second isolator 12 is connected to the FPGA processor 4, and finally sends a digital signal to the gas turbine control system TCS for alarm and load reduction control; sends a digital signal to the gas turbine protection system TPS for emergency shutdown of the gas turbine.

[0041] Example 4

[0042] As the best embodiment of the utility model, the utility model includes a gas turbine combustion pulsation signal processing device, which is used in conjunction with the gas turbine control system TCS and the gas turbine protection system TPS. Figure 1 The signal processing device includes a power module, a pulsation signal processing device 1, two sensors, and a safety gate 2 and a signal conditioner connected to the two sensors in a one-to-one correspondence. There can be two power modules, which provide two redundant power supply circuits for the entire processing device, making the power supply more stable and reliable. The two sensors are a pressure fluctuation sensor 7 and an acceleration sensor 8, and the two corresponding signal conditioners are a pressure fluctuation signal conditioner 3 and an acceleration signal conditioner 17.

[0043] Furthermore, the pressure fluctuation sensor 7 and the acceleration sensor 8 are made of piezoelectric crystals, and adopt the piezoelectric crystal principle. They are an active sensor based on the piezoelectric effect of piezoelectric crystal materials. The pressure fluctuation sensor 7 is used to measure the combustion pressure pulse in the burner. After sensing the pressure, it generates a charge pC (picocoulomb), and the unit is pC / bar. The pressure fluctuation sensor 7 transmits the charge signal to the pressure fluctuation signal conditioner 3 through the safety gate 2. After signal conditioning, the pressure fluctuation signal conditioner 3 converts the charge signal into a voltage signal and sends it to the pulsation signal processing device 1. The acceleration sensor 8 is used to measure the vibration of the burner shell. After sensing the acceleration, it generates a charge pC (picocoulomb), and the unit is pC / g. The acceleration sensor 8 transmits the charge signal to the acceleration signal conditioner 17 through the safety gate 2. After signal conditioning, the acceleration signal conditioner 17 converts the charge signal into a voltage signal and sends it to the pulsation signal processing device 1. More specifically, the pressure fluctuation sensor 7 may be DFP-1, the acceleration sensor 8 may be DFA-1, the pressure fluctuation signal conditioner 3 may be DFE-P, the acceleration signal conditioner 17 may be DFE-A, and the safety gate 2 may be 7778AC.

[0044] Furthermore, the pressure fluctuation sensor 7 and the acceleration sensor 8 are respectively installed on the gas turbine burner. Two safety barriers 2 are respectively arranged between the sensor and the signal conditioner, and the safety barrier 2, the pressure fluctuation signal conditioner 3 and the acceleration signal conditioner 17 are all installed in a non-hazardous area to effectively electrically isolate the signal and improve the reliability of the overall equipment.

[0045] The pulsation signal processing device 1 includes a CPU central processor 18, an FPGA processor 4, a signal input circuit, a first output circuit, a second output circuit, a data communication port 15, and a debugging and maintenance port 16. The FPGA processor 4 is connected to the CPU central processor 18, the data communication port 15, and the debugging and maintenance port 16. More specifically, the CPU central processor 18 can be GD32F427VGT6, the FPGA processor 4 can be GW2A-LV18EQ144C8, the data communication port 15 can be YT8522CA-IF4820, and the debugging and maintenance port 16 can be IN4148.

[0046] The signal input circuit is provided with two paths, corresponding to two sensors respectively. Each signal input circuit includes an analog input module 14, a filter 5 and an analog-to-digital converter 6 connected in sequence. The analog input module 14 in one of the signal input circuits is connected to the pressure fluctuation signal conditioner 3, and the analog-to-digital converter 6 is connected to the FPGA processor 4. The analog input module 14 in another signal input circuit is connected to the acceleration signal conditioner 17, and the analog-to-digital converter 6 is connected to the FPGA processor 4. More specifically, the filter 5 can be SGM8270-1, the analog-to-digital converter 6 can be CL1606, and the analog input module 14 can be SGM8270.

[0047] The first output circuit has two paths, which are used to output pressure fluctuation analog signals and acceleration analog signals respectively. Each first output circuit includes a first isolator 9, a digital-to-analog converter 10 and an analog output module 11 connected in sequence. The first isolator 9 is connected to the FPGA processor 4, and the analog output module 11 is connected to the gas turbine control system TCS. More specifically, the first isolator 9 can be NSI1200-1, the digital-to-analog converter 10 can be MS5541, and the analog output module 11 can be SGM8270.

[0048] The second output circuit is provided with twelve channels for outputting digital signals, including two output alarm circuits, four redundant output load reduction circuits and six redundant output shutdown circuits, which are used for outputting two alarm signals, four output load reduction signals and six output shutdown signals. The second output circuit includes a second isolator 12 and a digital output module 13 connected in sequence, and the second isolator 12 is connected to the FPGA processor 4. The second isolator 12 can be NSI1200-2, and the digital output module 13 can be GY212. Among them, the two output alarm signals are respectively a high pressure fluctuation alarm and a high acceleration alarm. The four output load reduction signals are respectively two pressure fluctuation high-1 (load reduction) and pressure fluctuation high-2 (load reduction), two acceleration high-1 (load reduction) and acceleration high-2 (load reduction), -1 and -2 are dual redundant structures. There are six output shutdown signals, namely three pressure fluctuation high-1 (shutdown), pressure fluctuation high-2 (shutdown) and pressure fluctuation high-3 (shutdown); three acceleration high-1 (shutdown), acceleration high-2 (shutdown) and acceleration high-3 (shutdown), -1, -2 and -3 are triple redundant structures.

[0049] The gas turbine control system TCS receives two analog output signals for display; receives two digital output alarm signals for alarm prompts to operators; receives four digital output load reduction signals for controlling the rapid load reduction of the gas turbine. The gas turbine protection system TPS receives six digital output signals for controlling the emergency shutdown of the gas turbine to protect the gas turbine. Full-frequency data communication transmission is carried out with the pulsation signal processing device 1 through the data communication port 15 to monitor the gas turbine control system TCS screen. The parameter setting, data storage, logic download and other functions of the pulsation signal processing device 1 are realized through the debugging and maintenance port 16.

[0050] For more details, please refer to the attached manual. Figure 2Under the action of combustion pulsation pressure, when the piezoelectric crystal material is subjected to stress or deformation in a certain direction, its polarization surface generates a charge corresponding to the stress, and the charge generated on the surface of the piezoelectric element is proportional to the force. The sensitivity unit of the pressure fluctuation sensor 7 is 500pC / bar. The generated charge passes through the safety gate 2 and is sent to the pressure fluctuation signal conditioner 3. After being processed by modules such as charge amplification-high and low filtering-amplifier or integrator, the pressure fluctuation signal conditioner 3 outputs a sinusoidal voltage signal with frequency. The input of the pressure fluctuation signal conditioner 3 is the charge output by the pressure fluctuation sensor 7. The sensitivity is consistent with the pressure fluctuation sensor 7, that is, 500pC / bar, and the output sensitivity is 12.5mV / kpa, which converts the charge signal into a voltage signal. The signal type received by the pulsation signal processing device 1 is a voltage signal. The voltage signal is sent to the analog input channel of the pulsation signal processing device 1, and after filtering / analog-to-digital conversion, it is sent to the FPGA processor 4 for signal analysis. The analysis frequency is divided into 5 frequency bands, namely L1 (0-100Hz), L2 (100-200Hz), M (200-1500Hz), H1 (1500-2500Hz), and H2 (2500-6000Hz). Each frequency band is set with three gear values ​​of alarm, load reduction, and shutdown. After being processed by the logic value and delay module of the FPGA processor 4, high pressure fluctuation alarm, high pressure fluctuation load reduction, and high pressure fluctuation shutdown are sent out respectively. The purpose of setting the delay is to prevent interference and signal fluctuations from causing malfunction of the gas turbine control system TCS or the gas turbine protection system TPS. The alarm condition of L1 frequency band is >8Kpa, delay 1s; the alarm condition of L2 frequency band is >8Kpa, delay 1s; the alarm condition of M frequency band is >6Kpa, delay 1s; the alarm condition of H1 frequency band is >1Kpa, delay 1s; the alarm condition of H2 frequency band is >0.5Kpa, delay 1s; when any of the 5 frequency bands reaches the alarm value, 1-way pressure fluctuation high alarm output is triggered. The load reduction condition of L1 frequency band is >10.6Kpa, delay 2s; the load reduction condition of L2 frequency band is >10.6Kpa, delay 2s; the load reduction condition of M frequency band is >8.5Kpa, delay 1s; the load reduction condition of H1 frequency band is >1.4Kpa, delay 1s; the load reduction condition of H2 frequency band is >0.7Kpa, delay 1s; when any of the 5 frequency bands reaches the load reduction value, 2-way pressure fluctuation high load reduction output is triggered. Among them, the shutdown condition of L1 frequency band is >12Kpa, delay 3s; the shutdown condition of L2 frequency band is >12Kpa, delay 3s; the shutdown condition of M frequency band is >10.6Kpa, delay 2s; the shutdown condition of H1 frequency band is >2.2Kpa, delay 2s; the shutdown condition of H2 frequency band is >1Kpa, delay 1s; when any of the 5 frequency bands reaches the shutdown value, the 3-way pressure fluctuation high shutdown output is triggered.

[0051] For more details, please refer to the attached manual. Figure 3 Under the action of the burner acceleration, when the piezoelectric crystal material is subjected to stress or deformation in a certain direction, its polarization surface generates a charge corresponding to the stress. The charge generated on the surface of the piezoelectric element is proportional to the acceleration, and the unit of acceleration is m / s. 2 (1g=9.8m / s 2 ). The sensitivity unit of the acceleration sensor 8 is 5pC / g. The generated charge is sent to the acceleration signal conditioner 17 after passing through the safety gate 2. After being processed by modules such as charge amplification-high and low filtering-amplifier or integrator, the acceleration signal conditioner 17 outputs a sinusoidal voltage signal with frequency. The input of the acceleration signal conditioner 17 is the charge output by the acceleration sensor 8. The sensitivity is consistent with the acceleration sensor 8, that is, 5pC / g, and the output sensitivity is 12.5mV / g, which converts the charge signal into a voltage signal. The pulsation signal processing device 1 receives a signal type of voltage signal. The voltage signal is sent to the analog input channel of the pulsation signal processing device 1, and after filtering / analog-to-digital conversion, it is sent to the FPGA processor 4 for signal analysis. The analysis frequency is divided into 5 frequency bands, namely L1 (0-100Hz), L2 (100-200Hz), M (200-1500Hz), H1 (1500-2500Hz), and H2 (2500-6000Hz). Each frequency band is set with three gear values ​​of alarm, load reduction and shutdown. After being processed by the logic value and delay module of FPGA processor 4, high acceleration alarm, high acceleration load reduction and high acceleration shutdown are sent out respectively. The purpose of setting the delay is to prevent interference and signal fluctuations from causing malfunction of gas turbine control system TCS or gas turbine protection system TPS. Among them, the alarm condition of L1 frequency band is >1.2g, delay 2s; the alarm condition of L2 frequency band is >1.2g, delay 2s; the alarm condition of M frequency band is >0.6g, delay 2s; the alarm condition of H1 frequency band is >0.6g, delay 2s; the alarm condition of H2 frequency band is >0.6g, delay 2s; when any frequency band in the 5 frequency bands reaches the alarm value, 1 high acceleration alarm output is triggered. The load reduction condition of L1 band is >1.5g, delay 2s; the load reduction condition of L2 band is >1.5g, delay 2s; the load reduction condition of M band is >0.8g, delay 1s; the load reduction condition of H1 band is >0.8g, delay 1s; the load reduction condition of H2 band is >0.8g, delay 1s; when any of the 5 bands reaches the load reduction value, 2 acceleration high load reduction outputs are triggered. The stop condition of L1 band is >2.2g, delay 3s; the stop condition of L2 band is >2.2, delay 3s; the stop condition of M band is >1g, delay 2s; the stop condition of H1 band is >1g, delay 1s; the stop condition of H2 band is >1g, delay 1s; when any of the 5 bands reaches the stop value, three acceleration high stop outputs are triggered.

[0052] To sum up, after reading the utility model document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the utility model without creative mental labor, which all fall within the scope of protection of the utility model.

Claims

1. A gas turbine combustion pulsation signal processing device, characterized in that: The invention comprises a pulsation signal processing device (1), at least one sensor, and a safety gate (2) and a signal conditioner connected to each sensor in a one-to-one correspondence; the pulsation signal processing device (1) comprises an FPGA processor (4) and a signal input circuit corresponding to each signal conditioner, each signal input circuit comprises a filter (5) and an analog-to-digital converter (6) connected in sequence; the analog-to-digital converter (6) is connected to the FPGA processor (4) respectively; the sensor is used to collect charge signals, which are processed by the safety gate (2) and the signal conditioner and then sent to the pulsation signal processing device (1).

2. A gas turbine combustion pulsation signal processing device according to claim 1, characterized in that: The sensor comprises a pressure fluctuation sensor (7) and an acceleration sensor (8).

3. A gas turbine combustion pulsation signal processing device according to claim 2, characterized in that: The pressure fluctuation sensor (7) and the acceleration sensor (8) are made of high-temperature piezoelectric crystals.

4. A gas turbine combustion pulsation signal processing device according to claim 3, characterized in that: The pressure fluctuation sensor (7) and the acceleration sensor (8) are respectively mounted on the gas turbine combustor.

5. A gas turbine combustion pulsation signal processing device according to claim 4, characterized in that: The output sensitivities of the signal conditioner are 12.5 mV / kpa and 12.5 mV / g respectively; the FPGA processor (4) is used for signal analysis, and the analysis frequency is divided into 5 frequency bands.

6. A gas turbine combustion pulsation signal processing device according to claim 1 or 5, characterized in that: The pulsation signal processing device (1) further comprises a first output circuit corresponding to each sensor; the first output circuit comprises a first isolator (9), a digital-to-analog converter (10) and an analog output module (11) connected in sequence, and the first isolator (9) is connected to the FPGA processor (4).

7. A gas turbine combustion pulsation signal processing device according to claim 6, characterized in that: The pulsation signal processing device (1) further comprises a second output circuit corresponding to each sensor; the second output circuit comprises a second isolator (12) and a digital quantity output module (13) connected in sequence, and the second isolator (12) is connected to the FPGA processor (4).

8. The gas turbine combustion pulsation signal processing device according to claim 7, characterized in that: Each sensor is correspondingly provided with six second output circuits, including one output alarm circuit, two redundant output load reduction circuits and three redundant output shutdown circuits.

9. The gas turbine combustion pulsation signal processing device according to claim 1, characterized in that: The pulsation signal processing device (1) also includes a data communication port (15) and a debugging and maintenance port (16).

10. The gas turbine combustion pulsation signal processing device according to claim 1, characterized in that: It also includes two redundant power supply circuits.

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