CN217786378U - Combined central axle temp. sensor for railway passenger train - Google Patents
Combined central axle temp. sensor for railway passenger train Download PDFInfo
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- CN217786378U CN217786378U CN202222192614.7U CN202222192614U CN217786378U CN 217786378 U CN217786378 U CN 217786378U CN 202222192614 U CN202222192614 U CN 202222192614U CN 217786378 U CN217786378 U CN 217786378U
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Abstract
The utility model provides a temperature sensor is concentrated to combined type for passenger train belongs to passenger train axle temperature sensor technical field, including sensor probe and connection cable, sensor probe includes the casing, is equipped with temperature measurement circuit board part in the casing, and temperature measurement circuit board part mainly combines together by digital temperature sensor DS18B20 and analog temperature sensor PT1000 and forms, and the connection cable is connected on the casing, and the lead wire in the connection cable is connected with the part that corresponds on the temperature measurement circuit board part. The utility model adopts the mode of combining the digital temperature sensor DS18B20+ the simulation temperature sensor PT1000, fully exerts the characteristics of high temperature measurement precision of the digital temperature sensor DS18S20 and wide temperature measurement range of the simulation temperature sensor PT1000, and improves the temperature measurement range, the temperature measurement precision and the reliability of the temperature sensor; through effectual IP67 protection design technique, effectively solve all kinds of different motorcycle types axle temperature alarm system and can not reach the product trouble problem that the requirement leads to inside the intaking of sensor and contact failure to arouse to temperature sensor IP67 protection.
Description
Technical Field
The utility model belongs to the technical field of passenger train axle temperature sensor, concretely relates to axle temperature sensor is concentrated to combined type for passenger train.
Background
The temperature sensors which are matched with a railway passenger car axle temperature alarm system at present mainly comprise two types, one type is a digital temperature sensor DS18B20 which is used at present, and the measurement temperature range is as follows: -55 ℃ to 125 ℃; the other adopts a PT1000 platinum resistance temperature sensor, and the measurement temperature range is as follows: -55 ℃ to 250 ℃. At present, a railway passenger car axle temperature alarm system adopts a two-wire digital temperature sensor DS18B20 and a PT1000 platinum resistance temperature sensor, which are not commonly used. The two existing shaft temperature sensors have false alarm, faults and the like in the using process, and the main reason of the false alarm and the faults generated by the shaft temperature alarm system of the railway passenger car is that the IP67 protection of the sensor cannot meet the requirement, so that water enters the sensor and the product faults are caused by poor contact; in addition, the single digital sensor DS18B20 has a narrow temperature measuring range of only-55-125 ℃, so that a certain report missing risk exists. There is therefore a need for improvements.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem: the utility model provides a combined type centralized axle temperature sensor for railway passenger cars, the utility model adopts the mode of combining the digital temperature sensor DS18B20+ the simulation temperature sensor PT1000, gives full play to the characteristics of high temperature measurement precision of the digital temperature sensor DS18S20 and wide temperature measurement range of the simulation temperature sensor PT1000, and improves the reliability of the temperature measurement range and the temperature measurement precision of the temperature sensor; through effectual IP67 protection design technique, effectively solve all kinds of different motorcycle types axle temperature alarm system and can not reach the product trouble problem that the requirement leads to inside the intaking of sensor and contact failure to arouse to temperature sensor IP67 protection.
The utility model adopts the technical proposal that: the combined type centralized shaft temperature sensor for the railway passenger car comprises a sensor probe and a connecting cable, wherein the sensor probe comprises a shell, a temperature measuring circuit board component is arranged in the shell and mainly consists of a digital temperature sensor DS18B20 and an analog temperature sensor PT1000 in a combined mode, the connecting cable is connected to the shell, and a lead in the connecting cable is connected with a corresponding component on the temperature measuring circuit board component.
In order to further limit the technical scheme, the circuit connection of the combined type centralized shaft temperature sensor is as follows: lead wire in the wiring cable includes lead wire 1 and lead wire 2, lead wire 1 is the positive end of combined sensor, lead wire 1 connects digital temperature sensor DS18B 20's VDD pin and the one end of simulation temperature sensor PT1000, lead wire 2 is the negative end of combined sensor, lead wire 2 connects the GND pin of digital temperature sensor DS18B20 and the other end of simulation temperature sensor PT1000 series connection one 1000 omega standard resistance R2, the VDD pin of digital temperature sensor DS18B20 and the GND pin of the other end connection digital temperature sensor DS18B20 are connected to 1 uF's electric capacity C2 one end, the GND pin of digital temperature sensor DS18B20 is connected to 1800 pF's electric capacity C1 one end, the other end of electric capacity C1 is connected jointly with the DO pin of digital temperature sensor DS18B20, the positive pole of diode D1 and the one end of simulation temperature sensor PT1000, the negative pole of diode D1 is connected the VDD pin of digital temperature sensor DS18B 20.
In a further limitation of the technical scheme, the shell is made of stainless steel, the overall height of the shell is 42 +/-0.5 mm, the shell is provided with a connecting screw rod, the length of the connecting screw rod is not more than 15mm, and the connecting screw rod is a common screw thread M16.
The technical scheme is further limited, the temperature measurement circuit board component is fixedly installed inside the shell through pouring sealant, and the pouring sealant adopts an adhesive with Shore hardness larger than 70.
Further inject above-mentioned technical scheme, the connecting cable adopts low smoke and zero halogen thin wall shielded cable, the connecting cable outside is equipped with the lagging, the lagging outside is equipped with the protecting wire pipe, protecting wire pipe external diameter is 15.8mm, and the material adopts PA6.
Compared with the prior art, the utility model advantage:
1. the scheme adopts a mode of combining the digital temperature sensor DS18B20 and the analog temperature sensor PT1000, fully exerts the characteristics of high temperature measurement precision of the digital temperature sensor DS18S20 and wide temperature measurement range of the analog temperature sensor PT1000, has an interface mode consistent with that of the original mode of independently adopting the digital temperature sensor DS18B20 or PT1000 platinum resistance temperature sensor, can be used instead in situ, improves the reliability of the temperature measurement range and the temperature measurement precision of the temperature sensor, and greatly improves the use convenience of the temperature sensor matched with the axle temperature alarm system of the railway carriage;
2. the combined type temperature sensor is formed by a DS18B20 chip + PT1000+1000 omega standard resistance mode through an effective IP67 protection design technology, is matched with a centralized shaft temperature alarm control display of a railway passenger car for use, has wide measurement temperature range of-55 ℃ -250 ℃, is unique in design, novel in concept, simple in structure, convenient to use, high in reliability and strong in compatibility, can effectively solve the problem that the shaft temperature alarm systems of various different vehicle types cannot meet the protection requirement of the temperature sensor IP67, so that the problems of water inflow inside the sensor and product faults caused by poor contact are caused, is low in production cost and high in production efficiency, is suitable for various rail transit shaft temperature alarm systems, has wide application range and provides reliable guarantee for accurate temperature monitoring of the centralized shaft temperature alarm system of the railway passenger car.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic circuit diagram of 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 accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
Please refer to fig. 1-2, which illustrate an embodiment of the present invention.
Axle temperature sensor is concentrated to combined type for passenger train, including sensor probe 1 and connection cable 4, sensor probe 1 includes casing 2, be equipped with temperature measurement circuit board part 3 in the casing 2, temperature measurement circuit board part 3 mainly combines together by digital temperature sensor DS18B20 and analog temperature sensor PT1000 and constitutes, connection cable 4 is connected on casing 2, lead wire 5 in the connection cable 4 is connected with the part that corresponds on the temperature measurement circuit board part 3.
The circuit connection of the combined type centralized shaft temperature sensor is as follows: lead 5 in the connection cable 4 includes lead 1 and lead 2, lead 1 is the positive end of combined sensor, lead 1 connects digital temperature sensor DS18B 20's VDD pin and the one end of simulation temperature sensor PT1000, lead 2 is the negative end of combined sensor, lead 2 connects the GND pin of digital temperature sensor DS18B20 and the other end of simulation temperature sensor PT1000 series connection a 1000 Ω standard resistance R2, the electric capacity C2 one end of 1 μ F connects the VDD pin of digital temperature sensor DS18B20 and the GND pin of the other end connection digital temperature sensor DS18B20, the electric capacity C1 one end of pF connects the GND pin of digital temperature sensor DS18B20, the electric capacity C1 other end and the DO pin of digital temperature sensor DS18B20, the positive pole of diode D1 and the one end of simulation temperature sensor PT1000 are connected jointly, the negative pole of diode D1 connects the GND pin of digital temperature sensor DS18B 20.
Wherein, connecting cable 4 adopts low smoke and zero halogen thin wall shielded cable, connecting cable 4 outside is equipped with lagging 6, 6 outsides of lagging are equipped with conduit 7, conduit 7 external diameter is 15.8mm, and the material adopts PA6, accords with the requirement of TJ/CL 430-2014. The design has the advantages that the temperature conduction of the sensor probe is protected, the heat loss is reduced, the invasion of wind, sand, rain and snow in the external severe environment can be resisted, and the requirements of high temperature and low temperature of-55-250 ℃ are met, so that the temperature detection accuracy of the sensor is effectively improved, and the safety of a train carrier is improved.
The shell 2 is made of stainless steel, the structural part is sealed firmly, the strength is high, the wear resistance and the corrosion resistance are good, and the waterproof and moistureproof performances are good. 2 appearance overall heights of casing are 42 ± 0.5mm, be equipped with connecting screw and length on the casing 2 and be not more than 15mm, connecting screw adopts ordinary screw thread M16.
The temperature measurement circuit board component 3 is fixedly arranged inside the shell 2 through pouring sealant, so that the pouring sealant and the stainless steel can be tightly combined at the temperature ranging from-55 ℃ to 250 ℃, the adhesive force effect on the stainless steel is good, and the use requirements of good medium resistance, oil resistance, water resistance, acid resistance and alkali resistance in the use of an external field are met. The pouring sealant adopts an adhesive with Shore hardness more than 70. Tests prove that the Shinesis CC2030MF adhesive can meet the use requirement.
(1) And (3) preparing the adhesive of the Schnershi CC2030MF adhesive according to the weight ratio of A to B = 8.
(2) Glue preparation, bonding and curing: the glue preparation proportion needs to be checked in the preparation process, the viscosity of the glue solution is observed after the preparation, when the viscosity of the glue solution is proper, the welded DS18B20 and PT1000 platinum resistors and mounting wires are fixed and covered by an adhesive, the space between the end cover and the bearing sleeve is filled, the coating height is flush with the tail of the stainless steel probe, and the curing is carried out for 20 hours at normal temperature.
The compound temperature sensor of the railway carriage is cured for 20 hours at normal temperature after glue pouring, the glue has good hardness through detection, the Shore hardness is between 80 and 85, the hardness meets the technical index requirement, the glue is tightly combined with stainless steel, the adhesive force effect on the stainless steel is good, and the compound temperature sensor of the railway carriage has good performances of water resistance, moisture resistance, vibration resistance, high reliability and the like. And carrying out an IP67 protection performance test, and after immersing the temperature sensor in water for 72h, measuring the insulation resistance between the lead of the temperature sensor and the shell by using a 500V megohmmeter, wherein the resistance value is greater than 50M omega. Through each item capability test, the combined type temperature sensor technical index requirement is all satisfied to sensor each item performance, and the passenger train combined type temperature sensor structure that adopts this technical design is sealed firm, can bear the invasion and attack of wind, husky, rain, snow, has good IP67 waterproof and humidity resistance, can satisfy the passenger train motor car operational environment demand.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (5)
1. Axle temperature sensor is concentrated to combined type for passenger train, its characterized in that: the temperature measurement circuit board comprises a sensor probe (1) and a connecting cable (4), wherein the sensor probe (1) comprises a shell (2), a temperature measurement circuit board component (3) is arranged in the shell (2), the temperature measurement circuit board component (3) is mainly formed by combining a digital temperature sensor DS18B20 and an analog temperature sensor PT1000, the connecting cable (4) is connected onto the shell (2), and a lead (5) in the connecting cable (4) is connected with a corresponding component on the temperature measurement circuit board component (3).
2. The composite concentrated axle temperature sensor for a passenger train of claim 1, wherein: the circuit connection of the combined type centralized shaft temperature sensor is as follows: lead (5) in the wiring cable (4) includes lead 1 and lead 2, lead 1 is the composite sensor positive terminal, lead 1 connects the VDD pin of digital temperature sensor DS18B20 and one end of analog temperature sensor PT1000, lead 2 is the composite sensor negative terminal, lead 2 connects the GND pin of digital temperature sensor DS18B20 and the other end of a 1000 Ω standard resistance R2 of analog temperature sensor PT1000 series connection, the capacitor C2 one end of 1 μ F connects the VDD pin of digital temperature sensor DS18B20 and the GND pin of digital temperature sensor DS18B20 at the other end, the capacitor C1 one end of 1800pF connects the GND pin of digital temperature sensor DS18B20, the capacitor C1 other end is connected with the DO pin of digital temperature sensor DS18B20, the positive pole of diode D1 and one end of analog temperature sensor PT1000 VDD jointly, the negative pole of diode D1 connects the pin of digital temperature sensor DS18B 20.
3. The composite centralized axle temperature sensor for railway passenger cars of claim 2, characterized in that: casing (2) adopt the stainless steel to make, casing (2) appearance overall height is 42 +/-0.5 mm, be equipped with connecting screw on casing (2) and length is not more than 15mm, connecting screw adopts ordinary screw thread M16.
4. The composite centralized axle temperature sensor for railway passenger cars of claim 3, characterized in that: temperature measurement circuit board part (3) are through pouring into casting glue fixed mounting inside casing (2), the casting glue adopts the adhesive that shore hardness is greater than 70.
5. The composite concentrated axle temperature sensor for a passenger train of claim 1, wherein: connection cable (4) adopt low smoke and zero halogen thin wall shielded cable, connection cable (4) outside is equipped with insulation cover (6), insulation cover (6) outside is equipped with protective wire pipe (7), protective wire pipe (7) external diameter is 15.8mm, and the material adopts PA6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222192614.7U CN217786378U (en) | 2022-08-19 | 2022-08-19 | Combined central axle temp. sensor for railway passenger train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222192614.7U CN217786378U (en) | 2022-08-19 | 2022-08-19 | Combined central axle temp. sensor for railway passenger train |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217786378U true CN217786378U (en) | 2022-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222192614.7U Active CN217786378U (en) | 2022-08-19 | 2022-08-19 | Combined central axle temp. sensor for railway passenger train |
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| Country | Link |
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| CN (1) | CN217786378U (en) |
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2022
- 2022-08-19 CN CN202222192614.7U patent/CN217786378U/en active Active
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