CN106817108B - Tuning unit circuit capable of improving stability - Google Patents
Tuning unit circuit capable of improving stability Download PDFInfo
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- CN106817108B CN106817108B CN201710010793.9A CN201710010793A CN106817108B CN 106817108 B CN106817108 B CN 106817108B CN 201710010793 A CN201710010793 A CN 201710010793A CN 106817108 B CN106817108 B CN 106817108B
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- unit circuit
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- capacitor
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
- H03J3/02—Details
- H03J3/04—Arrangements for compensating for variations of physical values, e.g. temperature
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Abstract
The invention relates to a tuning unit circuit capable of improving stability, which comprises a capacitor assembly and an inductor; one end of the capacitor assembly is connected with the first strip-shaped copper terminal through a first equal-resistance line, the other end of the capacitor assembly is connected with one end of the inductor through a second equal-resistance line, and the other end of the inductor is connected with the second strip-shaped copper terminal; the first equal-resistance wire and the second equal-resistance wire are both made of a plurality of strands of manganese copper wires, and the real part resistance value of the tuning unit circuit is adjusted by adjusting the overall length of the first equal-resistance wire and the second equal-resistance wire. The invention adopts manganese copper wires to manufacture the equal resistance wires, effectively reduces the variation of the real part resistance of the tuning unit circuit along with the temperature, and improves the stability and the electrical isolation of the tuning unit circuit; meanwhile, the production requirement of the tuning unit circuit is reduced, and the production efficiency and the product qualification rate of the tuning unit circuit are improved.
Description
Technical Field
The present invention relates to a tuning unit circuit, and more particularly, to a tuning unit circuit capable of improving stability.
Background
At present, the ZPW-2000A non-insulation frequency shift track circuit is widely applied to railway signal systems of existing lines and passenger dedicated lines. The key circuit is an electrical insulation joint circuit which plays the role of electrical isolation of the track circuit between adjacent sections. The electric insulation power-saving circuit is composed of a tuning unit circuit, a hollow coil and a steel rail inductor of a tuning area. The tuning unit circuit is composed of inductance and capacitance elements, and is divided into 4 different models of 1700Hz, 2000Hz, 2300Hz and 2600Hz according to the frequency characteristics of the track circuit.
The tuning unit circuit has two structural forms, and the two devices, namely a tuning unit (BA) and a tuning matching unit (PT), are respectively formed and are used for railway signal systems of existing lines and passenger dedicated lines. In order to improve the stability of the tuning unit circuit, the tuning circuit composed of the inductance and capacitance elements needs to be packaged in a special box body by using a polyurethane material, so that the vibration resistance and the shock resistance of the tuning circuit are improved, and the stability and the reliability of the tuning circuit are ensured.
The tuning unit (BA) and the tuning matching unit (PT) are arranged beside a track, have severe working conditions, need to bear extremely cold temperature of 40 ℃ below zero in winter and 70 ℃ in summer, and have severe cold and hot weather and repeated change. The circuit of the tuning unit must work stably, and the impedance value of the tuning unit must be controlled within a specified technical index range, so that the whole circuit of the tuning area can work in a reliable and stable state, and finally, the good electrical isolation degree of the adjacent track sections of the electrical insulation joint is ensured.
The specifications of the tuning unit circuit are divided into zero impedance and pole impedance, and the characteristics thereof are shown in the following table.
| Specification and model | Zero impedance test frequency | Polar impedance test frequency |
| 1700Hz | 2300Hz | 1700Hz |
| 2000Hz | 2600Hz | 2000Hz |
| 2300Hz | 1700Hz | 2300Hz |
| 2600Hz | 2000Hz | 2600Hz |
The zero impedance and the polar impedance are both composed of a real part resistance and an imaginary part resistance, the impedance value of the zero impedance and the polar impedance must be in a parallelogram formed by the real part resistance and the imaginary part resistance, and the impedance indexes of the tuning unit circuit are respectively shown in fig. 1, fig. 2, fig. 3 and fig. 4 according to 4 different frequency characteristics, wherein the unit is m omega.
The tuning unit circuit is classified into two-element circuits and three-element circuits according to its frequency characteristics. Of these, the two-element circuit has frequency characteristics of 1700Hz and 2000Hz, and the three-element circuit has frequency characteristics of 2300Hz and 2600Hz, and the schematic diagrams of the circuits are shown in fig. 5 and 6, respectively. Wherein, the adjustment of the real part resistance is realized by adjusting the length of the equal resistance wires 1 and 1'. The equal resistance wire is made of a plurality of strands of copper core polyvinyl chloride insulating wires, the overall length of the equal resistance wire is generally 300mm to 700mm, and therefore the resistance value of the real part resistor is correspondingly between tens of m omega to tens of m omega. By properly changing the length of the equal resistance wire, the real part resistance value of the tuning unit circuit can be adjusted to be in the middle position of the parallelogram index frame. The adjustment of the imaginary resistance is realized by adjusting the capacitance values of the capacitors C1 'and C2', and the imaginary resistance value is also in the middle position of the parallelogram index block.
In the prior art, because the tuning unit circuit works beside a track, the change range of the ambient temperature is large, the real part resistance changes along with the change of the temperature, and the real part resistance value can exceed the range of an index frame of a parallelogram seriously, so that tuning is damaged, and the electrical isolation of an electrical insulation joint is reduced. Therefore, in the production debugging process of the tuning unit circuit, the requirement on the production environment is extremely high, the tested material is required to be debugged and detected at the same ambient temperature after being placed for 24 hours at the specified ambient temperature of 25 ℃, and the real part resistance and the imaginary part resistance are required to be adjusted at the middle position of the parallelogram index frame. Only in this way, the impedance index can meet the normal use requirement under extreme high and low temperature conditions.
In the prior art, because the inductance, the capacitance, the resistance lines and other elements all have certain temperature coefficients, and the influence of factors such as encapsulation and the like, the resistance value of a real part resistor usually exceeds an index range in a use field, so that the use requirement cannot be met, and meanwhile, the yield of products is low. The reason is analyzed, the main factor is that the equal resistance wire adopts a multi-strand copper core polyvinyl chloride insulated wire with RV48 multiplied by 0.2, and the resistance temperature coefficient of the copper wire is larger and is 0.0039, so the temperature is increased, and the resistance of the corresponding equal resistance wire is increased along with the increase of the resistance temperature coefficient. If the material with lower temperature coefficient can be used as the resistance wire, the temperature stability of the real part resistor can be greatly improved, the qualification rate of products is improved, and the stability and the reliability of the electric insulation joint of the frequency shift track circuit are improved.
Disclosure of Invention
The invention aims to provide a tuning unit circuit capable of improving stability, wherein the constant-resistance wires are made of manganese copper wires, so that the variation of the real part resistance of the tuning unit circuit along with temperature is effectively reduced, and the stability and the electrical isolation of the tuning unit circuit are improved; meanwhile, the production requirement of the tuning unit circuit is reduced, and the production efficiency and the product qualification rate of the tuning unit circuit are improved.
In order to achieve the above object, the present invention provides a tuning unit circuit with improved stability, which is suitable for the tuning unit circuit with frequency characteristics of 1700Hz and 2000Hz, and comprises a capacitor component and an inductor; one end of the capacitor assembly is connected with the first strip-shaped copper terminal through a first equal-resistance line, the other end of the capacitor assembly is connected with one end of the inductor through a second equal-resistance line, and the other end of the inductor is connected with the second strip-shaped copper terminal; the first equal-resistance wire and the second equal-resistance wire are both made of a plurality of strands of manganese copper wires, and the real part resistance value of the tuning unit circuit is adjusted by adjusting the overall length of the first equal-resistance wire and the second equal-resistance wire.
The first equal-resistance wire and the second equal-resistance wire are both made of 48 multiplied by 0.2 manganese copper wires, namely, each manganese copper wire is phi 0.2mm in diameter and consists of 48 manganese copper wires.
The first equal-resistance line and the second equal-resistance line are coated with polyvinyl chloride plastic layers.
The capacitance component consists of a basic capacitor and an adjusting capacitor which are connected in parallel, and the resistance value of the imaginary part resistor of the tuning unit circuit is adjusted by adjusting the capacitance value of the adjusting capacitor.
The invention also provides a tuning unit circuit capable of improving stability, which is suitable for the tuning unit circuit with the frequency characteristics of 2300Hz and 2600Hz and comprises a first capacitor component, a second capacitor component and an inductor; one end of the first capacitor assembly is connected with the first strip-shaped copper terminal through a first equal resistance line, the other end of the first capacitor assembly is connected with one end of the inductor through a second equal resistance line, the other end of the inductor is connected with the second strip-shaped copper terminal, one end of the second capacitor assembly is connected with the first strip-shaped copper terminal through a third equal resistance line, and the other end of the second capacitor assembly is connected with the second strip-shaped copper terminal through a fourth equal resistance line; the first equal-resistance line, the second equal-resistance line, the third equal-resistance line and the fourth equal-resistance line are all made of a plurality of strands of manganese copper wires, and the real part resistance value of the tuning unit circuit is adjusted by adjusting the overall lengths of the first equal-resistance line, the second equal-resistance line, the third equal-resistance line and the fourth equal-resistance line.
The first equal-resistance wire, the second equal-resistance wire, the third equal-resistance wire and the fourth equal-resistance wire are all made of 48 multiplied by 0.2 manganese copper wires, namely, the diameter of each manganese copper wire is phi 0.2mm and the manganese copper wires are composed of 48 manganese copper wires.
The first equal-resistance line, the second equal-resistance line, the third equal-resistance line and the fourth equal-resistance line are coated with polyvinyl chloride plastic layers.
The first capacitor assembly is composed of a first basic capacitor and a first adjusting capacitor which are connected in parallel, the second capacitor assembly is composed of a second basic capacitor and a second adjusting capacitor which are connected in parallel, and the imaginary part resistance value of the tuning unit circuit is adjusted by adjusting the capacitance values of the first adjusting capacitor and the second adjusting capacitor.
According to the tuning unit circuit capable of improving the stability, the manganese copper wire is adopted to be made into the equal resistance wire, so that the variation of the real part resistance of the tuning unit circuit along with the temperature is effectively reduced, and the stability and the electrical isolation of the tuning unit circuit are improved; meanwhile, the production requirement of the tuning unit circuit is reduced, and the production efficiency and the product qualification rate of the tuning unit circuit are improved.
Drawings
FIGS. 1-4 are schematic diagrams of impedance indexes of 1700Hz, 2000Hz, 2300Hz and 2600Hz tuning unit circuits, respectively;
fig. 5 to 6 are circuit schematic diagrams of the two-element tuning unit circuit and the three-element tuning unit circuit, respectively.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to fig. 5 to 6.
As shown in fig. 5, the tuning unit circuit with frequency characteristics of 1700Hz and 2000Hz provided for the present invention includes a capacitance component and an inductance L; one end of the capacitor assembly is connected with the first strip-shaped copper terminal 2 through a first equal resistance line 1, the other end of the capacitor assembly is connected with one end of the inductor L through a second equal resistance line 1 ', and the other end of the inductor L is connected with the second strip-shaped copper terminal 2'; the first equal-resistance line 1 and the second equal-resistance line 1 'are both made of a plurality of strands of manganese copper wires, and the real part resistance value of the tuning unit circuit is adjusted by adjusting the overall length of the first equal-resistance line 1 and the second equal-resistance line 1'.
In this embodiment, the first equal resistance wire 1 and the second equal resistance wire 1' are both made of 48 × 0.2 6J11 manganese copper wires, that is, each manganese copper wire has a diameter of Φ 0.2mm and is composed of 48 manganese copper wires.
The first equal-resistance line 1 and the second equal-resistance line 1' are coated with flame-retardant polyvinyl chloride plastic layers to play a role in electrical insulation.
The capacitor assembly consists of a basic capacitor C1 and an adjusting capacitor C1 'which are connected in parallel, and the imaginary part resistance value of the tuning unit circuit is adjusted by adjusting the capacitance value of the adjusting capacitor C1'.
As shown in fig. 6, the tuning unit circuit with frequency characteristics of 2300Hz and 2600Hz provided by the present invention comprises a first capacitor element, a second capacitor element and an inductor L; one end of the first capacitor assembly is connected with the first strip-shaped copper terminal 2 through a first equal resistance line 1, the other end of the first capacitor assembly is connected with one end of the inductor L through a second equal resistance line 1 ', the other end of the inductor L is connected with the second strip-shaped copper terminal 2', one end of the second capacitor assembly is connected with the first strip-shaped copper terminal 2 through a third equal resistance line 3, and the other end of the second capacitor assembly is connected with the second strip-shaped copper terminal 2 'through a fourth equal resistance line 3'; the first equal-resistance line 1, the second equal-resistance line 1 ', the third equal-resistance line 3 and the fourth equal-resistance line 3' are all made of multiple strands of manganese copper wires, and the resistance value of the real part resistor of the tuning unit circuit is adjusted by adjusting the overall lengths of the first equal-resistance line 1, the second equal-resistance line 1 ', the third equal-resistance line 3 and the fourth equal-resistance line 3'.
In this embodiment, the first equal-resistance wire 1, the second equal-resistance wire 1 ', the third equal-resistance wire 3 and the fourth equal-resistance wire 3' are all made of 48 × 0.2 6J11 manganese copper wires, that is, each manganese copper wire has a diameter of Φ 0.2mm and is composed of 48 manganese copper wires.
The first equal-resistance line 1, the second equal-resistance line 1 ', the third equal-resistance line 3 and the fourth equal-resistance line 3' are coated with flame-retardant polyvinyl chloride plastic layers to achieve an electric insulation protection effect.
The first capacitor assembly is composed of a first basic capacitor C1 and a first adjusting capacitor C1 'which are connected in parallel, the second capacitor assembly is composed of a second basic capacitor C2 and a second adjusting capacitor C2' which are connected in parallel, and the imaginary part resistance value of the tuning unit circuit is adjusted by adjusting the capacitance values of the first adjusting capacitor C1 'and the second adjusting capacitor C2'.
Compared with the prior art, the tuning unit circuit capable of improving the stability has the following beneficial effects:
1. because the manganese copper wire has a smaller resistance temperature coefficient of 0.00001, which is 1/390 of the resistance temperature coefficient of the soft copper wire used in the prior art, in the environment temperature change of-40 ℃ to 70 ℃, the real part resistance in the zero impedance and the polar impedance of the tuning unit circuit is greatly reduced and reduced along with the change amount of the temperature, the technical parameters are more stable, thereby effectively reducing the temperature characteristic of the real part resistance and improving the stability and the electrical isolation of the whole electrical insulation joint.
2. The prior art has very high requirement on the temperature of the production environment of the tuning unit circuit, and the tested material can be debugged and tested only after being placed for 24 hours at the specified environment temperature of 25 ℃, so that the production efficiency is low. After the manganese copper wire is used as the equal resistance wire, the temperature coefficient of the manganese copper wire is very small, so that the requirement of the debugging and testing environment temperature of the tuning unit circuit can be reduced, and the requirement of the debugging and testing environment temperature can be met as long as the temperature is maintained between 20 ℃ and 30 ℃. Meanwhile, the tested material does not need to be placed for 24 hours, so that the production time is greatly shortened, the productivity is improved, and the production cost is reduced.
3. In the prior art, a soft copper wire is used as an equal resistance wire, and the resistance value of a real part resistor is required to be adjusted in the middle of a parallelogram index frame during debugging; however, even when the ambient temperature varies from-40 ℃ to 70 ℃, the resistance values of the real part resistors of the tuning unit circuits exceed the requirements of the index boxes, and thus the product yield is low. After the manganese copper wire is used as the equal resistance wire, the resistance value of the real part resistor can be only required to be in one area in the middle of the index frame during debugging, the debugging precision is reduced, when the environmental temperature is changed from minus 40 ℃ to 70 ℃, the variable quantity of the real part resistor is only 1/390, the condition that the resistance value exceeds the index frame is effectively reduced, and the product qualification rate of the tuning unit circuit is greatly improved.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (8)
1. A tuning unit circuit capable of improving stability is characterized by comprising a capacitor component and an inductor;
one end of the capacitor assembly is connected with the first strip-shaped copper terminal through a first equal-resistance line, and the other end of the capacitor assembly is connected with one end of the inductor through a second equal-resistance line;
the other end of the inductor is connected with a second strip-shaped copper terminal;
the first equal-resistance line and the second equal-resistance line are both made of a plurality of strands of manganese copper wires, and the real part resistance value of the tuning unit circuit is adjusted by adjusting the overall length of the first equal-resistance line and the second equal-resistance line;
the capacitance component consists of a basic capacitor and an adjusting capacitor which are connected in parallel, and the resistance value of the imaginary part resistor of the tuning unit circuit is adjusted by adjusting the capacitance value of the adjusting capacitor.
2. The tuning-unit circuit capable of improving stability as claimed in claim 1, wherein the tuning-unit circuit is adapted to the tuning-unit circuit having the frequency characteristics of 1700Hz and 2000 Hz.
3. The tuning unit circuit capable of improving the stability according to claim 1, wherein the first equal-resistance wire and the second equal-resistance wire are made of 48 x 0.2 manganese copper wires, namely, each manganese copper wire has a diameter of phi 0.2mm and consists of 48 manganese copper wires.
4. The tuning element circuit with improved stability as claimed in claim 3, wherein the first and second equipotential lines are externally coated with a polyvinyl chloride plastic layer.
5. A tuning element circuit with improved stability, comprising: a first capacitive component, a second capacitive component and an inductor;
one end of the first capacitor assembly is connected with the first strip-shaped copper terminal through a first equal-resistance line, and the other end of the first capacitor assembly is connected with one end of the inductor through a second equal-resistance line;
the other end of the inductor is connected with a second strip-shaped copper terminal;
one end of the second capacitor assembly is connected with the first strip-shaped copper terminal through a third equal resistance wire, and the other end of the second capacitor assembly is connected with the second strip-shaped copper terminal through a fourth equal resistance wire;
the first equal-resistance line, the second equal-resistance line, the third equal-resistance line and the fourth equal-resistance line are all made of a plurality of strands of manganese copper wires, and the real part resistance value of the tuning unit circuit is adjusted by adjusting the overall lengths of the first equal-resistance line, the second equal-resistance line, the third equal-resistance line and the fourth equal-resistance line;
the first capacitor assembly is composed of a first basic capacitor and a first adjusting capacitor which are connected in parallel, the second capacitor assembly is composed of a second basic capacitor and a second adjusting capacitor which are connected in parallel, and the imaginary part resistance value of the tuning unit circuit is adjusted by adjusting the capacitance values of the first adjusting capacitor and the second adjusting capacitor.
6. The tuning-unit circuit capable of improving stability as claimed in claim 5, wherein the tuning-unit circuit is adapted to the tuning-unit circuits having the frequency characteristics of 2300Hz and 2600 Hz.
7. The tuning unit circuit capable of improving the stability according to claim 5, wherein the first equal resistance wire, the second equal resistance wire, the third equal resistance wire and the fourth equal resistance wire are all made of 48 x 0.2 manganese copper wires, namely, each manganese copper wire has a diameter of phi 0.2mm and consists of 48 manganese copper wires.
8. The tuning element circuit with improved stability as claimed in claim 7, wherein the first, second, third and fourth equipotential lines are externally covered with a layer of polyvinyl chloride plastic.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710010793.9A CN106817108B (en) | 2017-01-06 | 2017-01-06 | Tuning unit circuit capable of improving stability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710010793.9A CN106817108B (en) | 2017-01-06 | 2017-01-06 | Tuning unit circuit capable of improving stability |
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| CN106817108A CN106817108A (en) | 2017-06-09 |
| CN106817108B true CN106817108B (en) | 2020-05-22 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107985131B (en) * | 2017-10-19 | 2020-01-10 | 北京全路通信信号研究设计院集团有限公司 | Insulating joint |
| CN112147554B (en) * | 2020-09-05 | 2023-08-15 | 武汉联影生命科学仪器有限公司 | Frequency and matching tuning device of receiving coil, low-temperature probe and magnetic resonance device |
| CN113353120A (en) * | 2021-07-16 | 2021-09-07 | 固安信通信号技术股份有限公司 | Tuning equipment |
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| CN2609811Y (en) * | 2002-05-24 | 2004-04-07 | 北京全路通信信号研究设计院 | Mechanical insulation joint track circuit device |
| CN101032971A (en) * | 2007-04-27 | 2007-09-12 | 北京交通大学 | Audio frequency orbit circuit impedance matching circuit in station |
| KR20110132756A (en) * | 2010-06-03 | 2011-12-09 | 엘지이노텍 주식회사 | Tuning circuit in tuner |
| CN203932343U (en) * | 2014-06-16 | 2014-11-05 | 沈阳铁路信号有限责任公司 | Resonance matching unit in naked frequency shift modulated track circuit |
| CN204341095U (en) * | 2015-01-05 | 2015-05-20 | 中铁通信信号勘测设计（北京）有限公司 | A kind of tuning compensator of anti-crosstalk and track circuit |
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2017
- 2017-01-06 CN CN201710010793.9A patent/CN106817108B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2609811Y (en) * | 2002-05-24 | 2004-04-07 | 北京全路通信信号研究设计院 | Mechanical insulation joint track circuit device |
| CN101032971A (en) * | 2007-04-27 | 2007-09-12 | 北京交通大学 | Audio frequency orbit circuit impedance matching circuit in station |
| KR20110132756A (en) * | 2010-06-03 | 2011-12-09 | 엘지이노텍 주식회사 | Tuning circuit in tuner |
| CN203932343U (en) * | 2014-06-16 | 2014-11-05 | 沈阳铁路信号有限责任公司 | Resonance matching unit in naked frequency shift modulated track circuit |
| CN204341095U (en) * | 2015-01-05 | 2015-05-20 | 中铁通信信号勘测设计（北京）有限公司 | A kind of tuning compensator of anti-crosstalk and track circuit |
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| 客专ZPW-2000A移频信号传输仿真与故障诊断研究;公续刚;《中国优秀硕士学位论文全文库》;20160615;第21-26，31-34页 * |
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