CN113027608A - Internal combustion engine piston top surface transient temperature remote measuring system and installation method thereof - Google Patents
Internal combustion engine piston top surface transient temperature remote measuring system and installation method thereof Download PDFInfo
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- CN113027608A CN113027608A CN202110366932.8A CN202110366932A CN113027608A CN 113027608 A CN113027608 A CN 113027608A CN 202110366932 A CN202110366932 A CN 202110366932A CN 113027608 A CN113027608 A CN 113027608A
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- 238000009434 installation Methods 0.000 title claims abstract description 19
- 238000004806 packaging method and process Methods 0.000 claims abstract description 53
- 238000004891 communication Methods 0.000 claims abstract description 16
- 238000012546 transfer Methods 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
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- 238000012545 processing Methods 0.000 claims description 42
- 239000003292 glue Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 3
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/089—Safety, indicating, or supervising devices relating to engine temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F2003/0007—Monolithic pistons; One piece constructions; Casting of pistons
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a transient temperature telemetering system for the top surface of a piston of an internal combustion engine and an installation method thereof, belonging to the technical field of temperature measurement of the internal combustion engine and comprising a packaging box, wherein the packaging box is a cuboid component, one side of the packaging box is sealed by a slidable baffle plate, a signal penetrating hole with the diameter of 1.5mm is arranged on the side surface of the packaging box, and the packaging box is made of a material with high conductivity and high magnetic permeability and is in contact with the internal combustion engine and grounded. According to the invention, the remote distance of information acquisition and the simultaneous control of the system power consumption are realized comprehensively by designing and matching the high-temperature-resistant chip supporting WIFI wireless communication and the router, the high-temperature-resistant chip supporting the WIFI communication technology and the programmable adjustment of the radio frequency power is selected, the radio frequency power is adjusted to be the lowest, and the problem of high power consumption of the system due to the use of WIFI can be effectively solved by matching the router; on the other hand, the signal transmission distance and speed can be greatly improved through the router transfer information, so that the arrangement position of the upper computer is more reasonable and safer.
Description
Technical Field
The invention belongs to the technical field of temperature measurement of internal combustion engines, and particularly relates to a remote measurement system for transient temperature of the top surface of a piston of an internal combustion engine and an installation method thereof.
Background
The piston is used as a core component of the internal combustion engine, the working environment is severe, mechanical load and thermal load are born, and along with the improvement of the strengthening degree of the internal combustion engine, the thermal load of the heated parts is inevitably increased and the distribution is not uniform. Especially, the parts directly contacting with flame like the piston have larger heat load, the top surface of the piston is more easy to generate heat damage phenomena such as ablation, heat crack and the like, and the running reliability of the internal combustion engine is seriously weakened. The piston surface temperature is an important parameter for evaluating the thermal stress, the thermal deformation, the use reliability and the like of the piston, but because the piston always bears the scouring of high-temperature and high-pressure gas and is accompanied by high-speed reciprocating motion in a closed narrow space, the working environment is very severe, so that how to accurately measure the transient temperature of the top wall surface of the piston is always the key point for studying by students, and meanwhile, in order to respond to the fourteenth five-year planning, the development of a modern industrial system is accelerated, the intellectualization of the traditional industry is promoted, the call of important products and key core technology attack and difficulty is increased, and the accurate measurement of the piston surface temperature has very high research value and engineering practical value.
Currently, the methods for measuring the temperature of the top surface of the piston mainly comprise a hardness plug type, a lead type, a storage type, a remote measuring type and a mutual inductance type. The hardness plug method adopts the relation between specific alloy hardness and temperature as a temperature measurement principle, is only suitable for measuring the temperature of the piston under a stable working condition and is not suitable for measuring the transient temperature of the top wall surface of the piston. The lead wire type measuring method is widely used, but the change of the engine is large, a large crankshaft space is needed, the application range is limited, and the use reliability is reduced. Although the storage type measuring method has good precision and reliability, the machine needs to be stopped and disassembled to obtain test data, the number of temperature data stored when the transient temperature is measured is large, and the storage speed and the storage space of a small memory used in the existing cylinder can not meet the requirement of transient temperature measurement. The mutual inductance type measuring method can be applied to the temperature measurement of the piston of the high-speed internal combustion engine, but the electromagnetic signals are easy to be interfered and data loss is easy to cause. Compared with the prior art, the remote measuring method can better overcome the defects, has high use reliability, and can accurately and intelligently acquire and display the transient temperature data of the top wall surface of the piston and the system working state information in real time.
The CN 102156005B and CN 202329851U adopt a storage type piston temperature measuring device in the form of a heat insulation box, a black-blind work mode is adopted, the piston is packaged before the experiment, and the memory is taken out to read out the experimental data after the experiment is finished, so that the real-time fault is not easy to process. Patent CN 106908164A proposes wireless measuring device based on bluetooth transmission, but need install the wire on the organism, and the system includes receiving antenna, data receiving module and pencil, and system architecture is complicated, and WIFI has faster transmission speed, and transmission distance is far away compared in bluetooth communication. Patent CN 102749149 a and patent CN 106706148A adopt ZigBee wireless technology for data transmission, but ZigBee has not been widely popularized and used in a large scale due to the problems of low transmission speed and reliability.
Therefore, under the condition of not influencing the internal structure of the engine, how to realize real-time high-precision measurement of transient temperature of the top wall surface of the piston while improving the reliability and operability of the temperature measuring system is a key problem to be solved in the field.
Disclosure of Invention
The invention aims to: designing a fixing mode capable of reducing the installation error of the thermocouple; in addition, the design has high utilization rate, convenient disassembly, strong bearing capacity and reliable system packaging mode, and finally, the adoption of a method of introducing a repeater realizes the purposes of controlling the power consumption of the system, diversifying the arrangement positions of the upper computer and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
the transient temperature remote measuring system comprises a packaging box, wherein the packaging box is a cuboid component, one side of the packaging box is sealed by a slidable separation blade, a signal penetrating hole with the diameter of 1.5mm is formed in the side face of the packaging box, the packaging box is made of a material with high conductivity and high magnetic permeability and is in contact with an internal combustion engine and grounded, the packaging box is fixed through a symmetrical triangle and a clamping ring, a threaded hole is formed in the symmetrical triangle of the packaging box, the threaded hole is connected with a piston pin boss through a bolt, the inner diameter of the clamping ring is consistent with the diameter of a piston pin, the piston pin vertically penetrates through the clamping ring to fix the packaging box on the piston pin boss, and the structure and the assembly mode of the packaging box are the same.
A kind of internal-combustion engine piston top surface transient temperature telemetering system and its installation method, also include a thermocouple installation method, the concrete mode is:
s101, processing a through hole with the diameter of 1 at a measuring point position for penetrating through a thermocouple lead;
s102, further, processing a hole with the diameter of 2 at the same position, wherein the height of the hole from the top surface of the piston to the bottom is H, and finally forming a step in the hole;
s103, pressing the thermocouple into the step hole, filling and sealing temperature-resistant inorganic glue from the bottom of the piston, and when the glue is filled, requiring that the temperature-resistant glue cannot overflow to the side surface of the thermocouple, and simultaneously paying attention to the fact that the temperature sensing end of the thermocouple is flush with the surface of the piston to be measured, and reducing redundant heat transfer of high-temperature gas to the thermocouple.
As a further description of the above technical solution:
and the two packaging boxes are respectively sleeved with the temperature-resistant battery and the outer side wall of the signal processing unit.
As a further description of the above technical solution:
the packaging box is fixed on the piston pin boss through a bolt and a clamping ring, and the power line is arranged along the concave part of the piston skirt part and is communicated with the power supply and the signal processing unit.
As a further description of the above technical solution:
the outer surface of the packaging box is bonded with heat insulation pastes, the heat insulation pastes are made of aluminum silicate glass fiber paper, the thickness of each heat insulation paste is 0.5mm, and the heat conductivity coefficient is smaller than 0.07W/m.K.
As a further description of the above technical solution:
the remote measuring system comprises a thermocouple arranged on the top surface of the piston and used for measuring the temperature of the piston to be measured and outputting a thermal potential signal, a thermocouple lead penetrates through a through hole in the piston to be connected with a signal processing unit, the input end of the signal processing unit is electrically connected with a temperature-resistant battery, and the output end of the signal processing unit is in communication connection with a router antenna arranged in the crank case.
As a further description of the above technical solution:
and the signal processing unit matching modules are all high-temperature resistant chips.
As a further description of the above technical solution:
the number of the thermocouples is a plurality, the multiple thermocouples are respectively arranged at different positions on the surface of the piston to be measured, and the thermocouples are used for synchronous acquisition.
As a further description of the above technical solution:
the router antenna is in communication connection with a router main body fixedly arranged outside the engine, the router is in communication connection with an upper computer, the upper computer is used for receiving signals of the signal processing unit, and the signal processing unit comprises an operational amplifier, a filter, a voltage stabilizing module, an analog-to-digital converter, a cold end compensator and a microprocessor integrated with a WIFI module.
A kind of remote measuring system of transient temperature of the top surface of the piston of the internal-combustion engine and its installation method, the system includes the following steps while working:
s201, measuring the temperature of a point to be measured on the wall surface of the top of the piston by a thermocouple and outputting a thermal potential signal;
s202, transmitting the thermoelectric potential signal to a signal processing unit by a thermocouple lead;
s203, the signal processing unit amplifies, filters and converts the thermoelectric voltage signal;
s204, the signal processing unit transmits the processed effective data to an upper computer through a WIFI wireless communication technology;
and S205, storing and displaying the required transient temperature data of the piston top wall surface in real time by the upper computer.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the invention, by reasonably designing the thermocouple installation method, the interference of heat transfer between the thermocouple and the piston caused by temperature-resistant glue can be avoided, and the excessive heat transfer of high-temperature gas to the thermocouple can be reduced, so that the error caused by the installation of the thermocouple can be reduced, and the aim of synchronously acquiring a plurality of thermocouples can be realized.
2. According to the invention, the packaging box which is convenient to install, can be repeatedly utilized, can enhance the bearing capacity and improve the signal penetration efficiency is designed, and the reliable installation of the signal processing unit and the temperature-resistant battery is ensured.
3. According to the invention, the remote, big data and high-speed transmission of the acquired information are comprehensively realized by designing and matching the high-temperature-resistant chip supporting the WIFI wireless communication and the router, the power consumption of the system is controlled at the same time, the high-temperature-resistant chip supporting the WIFI communication technology and supporting the programmable adjustment of the radio frequency power is selected, the radio frequency power of the high-temperature-resistant chip is adjusted to be the lowest, and the problem of high power consumption of the system due to the use of WIFI can be effectively solved by matching the router; on the other hand, the signal transmission distance and speed can be greatly improved through the router transfer information, so that the arrangement position of the upper computer is more reasonable and safer.
Drawings
FIG. 1 is a schematic block diagram of an internal combustion engine piston top surface transient temperature telemetry system and method of installation thereof in accordance with the present invention;
FIG. 2 is a schematic structural diagram of a transient temperature telemetry system for the top surface of a piston of an internal combustion engine and a method for installing the same according to the present invention;
FIG. 3 is a schematic diagram of thermocouple installation for an internal combustion engine piston top surface transient temperature telemetry system and method of installation thereof according to the present invention;
FIG. 4 is a schematic structural diagram of a packaging box of the transient temperature telemetry system for the top surface of the piston of the internal combustion engine and the installation method thereof;
FIG. 5 is a three-dimensional view of a package for an internal combustion engine piston top surface transient temperature telemetry system and method of installation.
Illustration of the drawings:
FIG. 2: 1. a combustion chamber; 2. a piston; 3. packaging box A; 4. a temperature resistant battery; 5. a packaging box B; 6. a signal processing unit; 7. a thermocouple; 8. a router; 9. an upper computer;
FIG. 3: h is the height of the thermocouple mounting hole, 1 is the diameter of the through hole, and 2 is the aperture of the thermocouple mounting hole;
FIG. 5: a is the length of the packaging box, b is the height of the packaging box, c is the width of the packaging box, 3 is the diameter of the signal penetrating hole, and 4 is the diameter of the power supply lead and the thermocouple lead connecting hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the 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.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides an internal-combustion engine piston top surface transient temperature remote sensing system and installation method, the packaging box is the cuboid component, and packaging box one side is sealed by the separation blade that can slide, and the packaging box side is equipped with the signal through hole of diameter 1.5mm, the packaging box adopts the material of high conductivity and high magnetic permeability and contacts ground with the internal-combustion engine, the packaging box realizes fixedly through symmetry triangle and snap ring, and the packaging box symmetry triangle is beaten threaded hole, and is connected through bolt and piston 2 round pin seat in the threaded hole, the snap ring internal diameter is unanimous with piston 2 round pin diameter, and piston 2 round pin is vertical to passing the snap ring and fix the packaging box on piston 2 round pin seat, the packaging box surface all bonds and has heat-insulating subsides, the aluminium silicate glass fiber paper that heat-insulating subsides are, and heat-insulating subsides thickness 0.5mm, and coefficient of heat conductivity is less than 0.07W/.
The implementation mode is specifically as follows: the packaging box is simple in design and processing, can be repeatedly utilized, is high in reliability and pressure resistance, can be changed in size according to a specific temperature measurement object, is formed by linear cutting and welding splicing, is favorable for WIFI signals to penetrate through a signal penetrating hole, is made of a material with high conductivity and high magnetic permeability, is in contact with an internal combustion engine to realize grounding, effectively shields an external electric field and a magnetic field, and is also favorable for improving the bearing capacity; the packaging box is fixed through the symmetrical triangles and the clamping ring, the symmetrical triangles are provided with threaded holes, the bolts are connected with the piston 2 pin base through the threaded holes, the packaging box is horizontally fixed, the inner diameter of the clamping ring is consistent with the diameter of the piston 2 pin, the piston 2 pin penetrates through the clamping ring when the packaging box is installed, the packaging box is fixed in the vertical direction, the packaging box is finally and reliably fixed on the piston 2 pin base, and meanwhile, the heat conduction quantity of the piston 2 to the packaging box can be effectively reduced through the heat insulation paste.
A thermocouple installation method is specifically as follows:
s101, processing a through hole with the diameter of 1 at a measuring point position to pass through a lead of a thermocouple 7;
s102, further, processing a hole with the diameter of 2 at the same position, wherein the height of the hole from the top surface of the piston 2 to the bottom is H, 1 is less than 2, 2 is equal to the diameter of the thermocouple 7, H is equal to the length of the thermocouple 7, and finally, a step is formed in the hole;
s103, pressing the thermocouple 7 into the stepped hole, filling and sealing temperature-resistant inorganic glue from the bottom of the piston 2, and when the glue is filled, requiring that the temperature-resistant glue cannot overflow to the side surface of the thermocouple 7, and simultaneously paying attention to the fact that the temperature sensing end of the thermocouple 7 is flush with the surface of the piston 2 to be measured, so that redundant heat transfer of high-temperature gas to the thermocouple 7 is reduced.
The implementation mode is specifically as follows: the inorganic adhesive has good fluidity, insulativity at an extreme temperature and good thermal conductivity besides being resistant to high temperature for a long time, and the temperature-resistant adhesive does not overflow to the side surface of the thermocouple 7 so as to ensure normal radial heat transfer between the thermocouple 7 and the piston 2.
The telemetering system comprises a thermocouple 7 arranged on the top surface of the piston 2 and used for measuring the temperature of the piston 2 to be measured and outputting a thermoelectrical potential signal, a lead of the thermocouple 7 penetrates through a through hole on the piston 2 and is connected with a signal processing unit 6, the input end of the signal processing unit 6 is electrically connected with a temperature-resistant battery 4, the output end of the signal processing unit 6 is in communication connection with a router 8 antenna arranged in a crankcase, the router 8 antenna is in communication connection with a router 8 main body fixedly arranged outside an engine, the router 8 is in communication connection with an upper computer 9, the upper computer 9 is used for receiving the signal of the signal processing unit 6, the signal processing unit 6 comprises an operational amplifier, a filter, a voltage stabilizing module, an analog-to-digital converter, a cold end compensator and a microprocessor integrated with a WIFI module, and the outer side walls of the, and the packaging box A and the packaging box B are respectively fixed on the pin boss of the piston 2 through bolts and clamping rings, and the power line is arranged along the concave part of the skirt part of the piston 2 and communicated with the power supply and the signal processing unit 6.
The implementation mode is specifically as follows: a lead of the thermocouple 7 penetrates through the packaging box and is used for measuring the temperature of the piston 2 to be measured and outputting a thermal potential signal; and a lead of the thermocouple 7 penetrates through a through hole on the piston 2, is connected with the signal processing unit 6 and is connected to a receiving port of the acquisition board. The router 8 antenna is fixed on the inner wall surface of the crankcase of the internal combustion engine, the antenna is led out of the engine through a signal connecting line and connected with the router 8, the temperature-resistant battery 4 and the signal processing unit 6 are respectively protected by temperature-resistant heat-shrinkable tube in an insulation mode, the upper computer 9 and the signal processing unit 6 transfer information through the router 8 to achieve long-distance and low-power-consumption bidirectional wireless communication, the signal processing unit 6 processes temperature signals on the top surface of the piston 2 and finally sends the signals to the upper computer 9, and the instructions sent by the upper computer 9 are received and executed in the same way.
The working principle is as follows: when the device is used, S201, the thermocouple 7 measures the temperature of a point to be measured on the top wall surface of the piston 2 and outputs a thermal potential signal;
s202, transmitting the thermoelectric voltage signal to the signal processing unit 6 by a lead wire of the thermocouple 7;
s203, the signal processing unit 6 amplifies, filters and converts the thermoelectric voltage signal;
s204, the signal processing unit 6 transmits the processed effective data to the upper computer 9 through a WIFI wireless communication technology;
and S205, the upper computer 9 stores and displays the required transient temperature data of the top wall surface of the piston 2 in real time.
And when the electric quantity of the temperature-resistant battery 4 is insufficient, the packaging box is disassembled to replace the new temperature-resistant battery 4 so as to ensure the normal work of the system.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The transient temperature remote measuring system comprises a packaging box provided with a temperature-resistant battery and a signal processing unit, and is characterized in that the packaging box is a cuboid component, one side of the packaging box is sealed by a slidable retaining sheet, a signal penetrating hole with the diameter of 1.5mm is formed in the side face of the packaging box, the packaging box is made of a material with high conductivity and high magnetic permeability and is in contact with an internal combustion engine and grounded, the packaging box is fixed through a symmetrical triangle and a clamping ring, the symmetrical triangle of the packaging box is provided with a threaded hole, the threaded hole is connected with a piston pin boss through a bolt, the inner diameter of the clamping ring is consistent with the diameter of a piston pin, and the piston pin vertically penetrates through the clamping ring to fix the packaging box on the piston pin boss.
2. The system of claim 1, further comprising a thermocouple installation method, in particular by:
s101, processing a through hole with the diameter of 1 at a measuring point position for penetrating through a thermocouple lead;
s102, further, processing a hole with the diameter of 2 at the same position, wherein the height of the hole from the top surface of the piston to the bottom is H, and finally forming a step in the hole;
s103, pressing the thermocouple into the step hole, filling and sealing temperature-resistant inorganic glue from the bottom of the piston, and when the glue is filled, requiring that the temperature-resistant glue cannot overflow to the side surface of the thermocouple, and simultaneously paying attention to the fact that the temperature sensing end of the thermocouple is flush with the surface of the piston to be measured, and reducing redundant heat transfer of high-temperature gas to the thermocouple.
3. The system of claim 1 wherein two of said enclosures are respectively sleeved on the outer side walls of the temperature-resistant battery and the signal processing unit.
4. The system of claim 1 wherein the enclosure is secured to the pin bosses by bolts and snap rings, and the power cord is routed along the recessed portion of the skirt portion and communicates with the power supply and signal processing unit.
5. The system and the method for installing the same as claimed in claim 1, wherein the heat insulating paste is adhered to the outer surface of the packaging box, the heat insulating paste is made of alumina silicate glass fiber paper, the thickness of the heat insulating paste is 0.5mm, and the thermal conductivity coefficient is less than 0.07W/m.K.
6. The system of claim 1, wherein the system comprises a thermocouple mounted on the top surface of the piston for measuring the temperature of the piston to be measured and outputting a thermopotential signal, a lead of the thermocouple is connected to a signal processing unit through a through hole in the piston, an input end of the signal processing unit is electrically connected to a temperature-resistant battery, and an output end of the signal processing unit is communicatively connected to a router antenna mounted inside the crankcase.
7. The system and the method for the telemetering of the transient temperature of the top surface of the piston of the internal combustion engine according to claim 6, wherein the signal processing unit and the module are all high temperature resistant chips.
8. The system and the method for remotely measuring the transient temperature of the top surface of the piston of the internal combustion engine according to claim 6, wherein the number of the thermocouples is several, and a plurality of thermocouples are respectively arranged at different positions on the surface of the piston to be measured, and the thermocouples are used for synchronously collecting.
9. The system of claim 6, wherein the router antenna is in communication connection with a router body fixedly arranged outside the engine, the router is in communication connection with an upper computer, the upper computer is used for receiving signals of the signal processing unit, and the signal processing unit comprises an operational amplifier, a filter, a voltage stabilizing module, an analog-to-digital converter, a cold end compensator and a microprocessor integrated with a WIFI module.
Priority Applications (1)
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Cited By (2)
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| CN114173217A (en) * | 2021-11-09 | 2022-03-11 | 天津大学 | Wireless data transmission device and method for measurement information in piston of internal combustion engine cylinder |
| CN114323324A (en) * | 2021-12-28 | 2022-04-12 | 北京动力机械研究所 | Rotary telemetering system installed between shafts |
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| CN114173217A (en) * | 2021-11-09 | 2022-03-11 | 天津大学 | Wireless data transmission device and method for measurement information in piston of internal combustion engine cylinder |
| CN114173217B (en) * | 2021-11-09 | 2022-11-04 | 天津大学 | Wireless data transmission device and method for measurement information in piston of internal combustion engine cylinder |
| CN114323324A (en) * | 2021-12-28 | 2022-04-12 | 北京动力机械研究所 | Rotary telemetering system installed between shafts |
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