CN105021764A - Circuit for measuring combustion speed of solid propellant and measurement method thereof - Google Patents
Circuit for measuring combustion speed of solid propellant and measurement method thereof Download PDFInfo
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- CN105021764A CN105021764A CN201510452791.6A CN201510452791A CN105021764A CN 105021764 A CN105021764 A CN 105021764A CN 201510452791 A CN201510452791 A CN 201510452791A CN 105021764 A CN105021764 A CN 105021764A
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- resistance
- propellant
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- combustion
- conductive foil
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Abstract
The invention discloses a circuit for measuring a combustion speed of a solid propellant and a measurement method thereof. The circuit comprises a power supply, a variable resistance circuit, a data acquisition card and a protective resistor RX which are connected in sequence, wherein the protective resistor RX is connected with a cathode electrode of the power supply; the variable resistance circuit comprises a conductive thin sheet; the conductive thin sheet contains metal wires; when the circuit is used, the conductive thin sheet is stuck on the surface of a propellant to be subjected to combustion speed measurement; along the combustion of the propellant, the metal wires in the conductive thin sheet are burnt off; when one metal wire is burnt off, current in the circuit is suddenly changed and a sudden change time point of the current can be obtained from the data acquisition card; and the distance between the two adjacent metal wires is known and the combustion speed of the propellant is obtained by dividing a corresponding current sudden change time interval by the distance between the two adjacent metal wires. The circuit has high measurement precision and a wide measurement range; and the combustion speed of a low-combustion-speed propellant can be measured and the combustion speed of a high-combustion-speed propellant also can be measured.
Description
Technical field
The present invention relates to solid propellant burning velocity testing technology, be specifically related to a kind of circuit and the measuring method thereof of measuring solid propellant combustion rate.
Background technology
The combustion speed of propellant is the important indicator of propellant, and the combustion speed measuring propellant is accurately conducive to improving solid engines design accuracy.Japanese scholars Akira Kakami and Ryoma Hiyamizu is in " Laser-Assisted Combustion of Solid Propellant at Low Pressures " literary composition, propose a kind of method measuring propellant burning rate, one is placed rule on propellant side, by the combustion process of high-speed camera shooting propellant, observe propellant combustion face in the position of rule in video, with combustion face in the change of scale position divided by the time interval in video, thus obtain combustion speed.This method precision is low, is only suitable for measuring firing the propellant that speed is low, energy is low, and the propellant for high energy height combustion speed is too fast due to what burn, and flame brightness is too high, cannot observe that propellant combustion face is in the position of rule.
Chinese scholar Yan Qi-long proposes in " Combustion mechanism of double-base propellant containing nitrogenheterocyclic nitroamines (I): The effect of heat and mass transfer tothe burning characteristics " literary composition, to how be inserted in propellant inside with tinsel, tinsel is connected with circuit, along with the burning of propellant, tinsel is fused, electric current in circuit changes, the combustion speed of propellant can be obtained according to the change of electric current and the time interval, the combustion speed that tinsel can accelerate propellant is inserted in propellant, so the burning of propellant that above-mentioned measuring method measures is bigger than normal, on the other hand, the method that combustion speed measured by this built-in metal silk can not use in very thin propellant sample, owing to can not place too many tinsel, makes measuring accuracy limited, finally, because propellant is hazardous chemical, China only has several company to manufacture propellant, and tinsel cannot be put into propellant inside by the propellant directly buying finished product.
Summary of the invention
The object of the present invention is to provide a kind of circuit and measuring method thereof measuring solid propellant combustion rate, solve the problem that the solid propellant burning rate of the fast high brightness of small sample height combustion is not easily measured.
The technical solution realizing the object of the invention is: a kind of circuit measuring solid propellant combustion rate, comprises the power supply, variable resistance circuit, data collecting card and the protective resistance R that connect successively
x, protective resistance R
xbe connected with power cathode again; Described variable resistance circuit comprise conductive foil, the first resistance R1, the second resistance R2 ..., the n-th resistance Rn, n>=3, the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects successively; Conductive foil comprises thin slice and tinsel, m one metal wire is set in parallel on thin slice, m=n, one end of m one metal wire is all connected with positive source, the other end respectively with the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects one to one, the other end of the n-th resistance Rn is connected with data collecting card.
The matrix material of described thin slice adopts thermoset resin.
Measure a method for solid propellant combustion rate, step is as follows:
Step 1) arranges the circuit measuring solid propellant combustion rate:
M one metal wire is set in parallel on thin slice, one end of m one metal wire is all connected with positive source, the other end respectively with the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects one to one, wherein the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects successively; Connect power supply, variable resistance circuit, data collecting card and protective resistance R successively again
x, protective resistance R
xbe connected with power cathode.
Step 2) conductive foil is arranged on the fast propellant surface of combustion to be measured.
Step 3) lights propellant.
Tinsel in conductive foil blows by the aflame propellant of step 4), often blow an one metal wire, electric current in circuit will change, distance L between adjacent two one metal wires in the time interval t of the curent change collected according to data collecting card and conductive foil measures combustion speed V, the propellant burning rate V=L/t of propellant.
Compared with prior art, its remarkable advantage is in the present invention: (1) measuring accuracy is high, because conductive foil is the surface being attached to propellant, can not affect the combustion speed of propellant itself.
(2) measuring accuracy is adjustable, and because conductive foil is self-made, the interval of adjacent two one metal wires in conductive foil is adjustable, by adjusting the spacing of adjacent two one metal wires, thus adjustment measuring accuracy.
(3) applied range, both can measure the propellant of high combustion speed, also can measure the propellant of low burning rate.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram measuring the circuit of solid propellant combustion rate of the present invention.
Fig. 2 is a kind of schematic diagram measuring the conductive foil of the circuit of solid propellant combustion rate of the present invention.
Fig. 3 is a kind of circuit connecting line figure measuring solid propellant combustion rate of the present invention.
Fig. 4 is a kind of method flow diagram measuring solid propellant combustion rate of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Composition graphs 1, Fig. 2 and Fig. 3, a kind of circuit measuring solid propellant combustion rate, comprises the power supply, variable resistance circuit, data collecting card and the protective resistance R that connect successively
x, protective resistance R
xbe connected with power cathode again; Described variable resistance circuit comprise conductive foil 1, first resistance R1, the second resistance R2 ..., the n-th resistance Rn, n>=3, first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects successively, conductive foil 1 comprises thin slice 2 and tinsel 3, m one metal wire 3 is set in parallel on thin slice 2, m=n, one end of m one metal wire 3 is all connected with positive source, the other end respectively with the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects one to one, the other end of the n-th resistance Rn is connected with data collecting card.
The matrix material of thin slice 2 adopts thermoset resin.
Composition graphs 4, a kind of method measuring solid propellant combustion rate, step is as follows:
Step 1) arranges the circuit measuring solid propellant combustion rate:
M one metal wire 3 is set in parallel on thin slice 2, one end of m one metal wire 3 is all connected with positive source, the other end respectively with the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects one to one, wherein the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects successively; Connect power supply, variable resistance circuit, data collecting card and protective resistance R successively again
x, protective resistance R
xbe connected with power cathode.
Step 2) conductive foil 1 is arranged on the fast propellant surface of combustion to be measured.
Step 3) lights propellant.
Tinsel 3 in conductive foil 1 blows by the aflame propellant of step 4), often blow an one metal wire 3, electric current in circuit will change, distance L between adjacent two one metal wires 3 in the time interval t of the curent change collected according to data collecting card and conductive foil 1 measures combustion speed V, the propellant burning rate V=L/t of propellant.
Embodiment 1
Composition graphs 1, Fig. 2 and Fig. 3, a kind of circuit measuring solid propellant combustion rate, comprises the power supply, variable resistance circuit, data collecting card and the protective resistance R that connect successively
x, protective resistance R
xbe connected with power cathode again, described variable resistance circuit comprises conductive foil 1, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6 connects successively, conductive foil 1 comprises thin slice 2 and tinsel 3, 6 one metal wires 3 are set in parallel on thin slice 2, one end that 6 one metal wires 3 are positioned at homonymy is all connected with positive source, the other end being positioned at homonymy respectively with the first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6 connects one to one, the other end of the 6th resistance R6 is connected with data collecting card.
Polybutadiene selected by the matrix material of thin slice 2.
Composition graphs 4, a kind of measuring method measuring solid propellant combustion rate, step is as follows:
Step 1) arranges the circuit measuring solid propellant combustion rate:
6 one metal wires 3 are set in parallel on thin slice 2, one end that 6 one metal wires 3 are positioned at homonymy is all connected with positive source, the other end being positioned at homonymy connects one to one with the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6 respectively, and wherein the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6 connect successively; Connect power supply, variable resistance circuit, data collecting card and protective resistance R successively again
x, protective resistance R
xbe connected with power cathode.
Step 2) conductive foil 1 is arranged on the fast propellant surface of combustion to be measured.
Step 3) lights propellant.
Tinsel 3 in conductive foil 1 blows by the aflame propellant of step 4), often blow an one metal wire 3, electric current in circuit will change, distance L between adjacent two one metal wires 3 in the time interval t of the curent change collected according to data collecting card and conductive foil 1 measures combustion speed V, the propellant burning rate V=L/t of propellant.
The voltage of power supply 1 is 5V, R1=R2=R3=R4=R5=R6=10 ohm, two adjacent spacing distances wiry are 1mm, when propellant is just lighted a fire, during propellant unburned, the electric current that described data collecting card collects is 500 milliamperes, after propellant is lighted and is taken fire, blow the first one metal wire, the electric current that now data collecting card collects is 250 milliamperes, time is now t1, propellant burns away, blow the 2nd successively, 3, 4, 5, 6 one metal wires, the current signal that data collecting card collects can become 166.67 milliamperes successively, 125 milliamperes, 100 milliamperes, 83.3 milliamperes, 0 milliampere, the time point can reading current break from data collecting card is followed successively by t2, t3, t4, t5, t6.Then the combustion speed of propellant is followed successively by 1/ (t2-t1), 1/ (t3-t2), 1/ (t4-t3), 1/ (t5-t4), 1/ (t6-t5).
Adopt circuit and the measuring method thereof of measurement solid propellant combustion rate of the present invention, measuring accuracy is high, because conductive foil is the surface being attached to propellant, can not affect the combustion speed of propellant itself.Measuring accuracy is adjustable, and because conductive foil is self-made, the interval of adjacent two one metal wires in conductive foil is adjustable, by adjusting the spacing of adjacent two one metal wires, thus adjustment measuring accuracy.Applied range, both can measure the propellant of high combustion speed, also can measure the propellant of low burning rate.
Claims (3)
1. measure a circuit for solid propellant combustion rate, it is characterized in that: comprise the power supply, variable resistance circuit, data collecting card and the protective resistance R that connect successively
x, protective resistance R
xbe connected with power cathode again; Described variable resistance circuit comprise conductive foil (1), the first resistance R1, the second resistance R2 ..., the n-th resistance Rn, n>=3, the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects successively; Conductive foil (1) comprises thin slice (2) and tinsel (3), m one metal wire (3) is set in parallel on thin slice (2), m=n, one end of m one metal wire (3) is all connected with positive source, the other end respectively with the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects one to one, the other end of the n-th resistance Rn is connected with data collecting card.
2. the circuit of measurement solid propellant combustion rate according to claim 1, is characterized in that: the matrix material of described thin slice (2) adopts thermoset resin.
3., based on the combustion speed measuring method of the circuit of measurement solid propellant combustion rate according to claim 1, it is characterized in that, step is as follows:
Step 1) arranges the circuit measuring solid propellant combustion rate:
M one metal wire (3) is set in parallel on thin slice (2), one end of m one metal wire (3) is all connected with positive source, the other end respectively with the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects one to one, wherein the first resistance R1, the second resistance R2 ..., the n-th resistance Rn connects successively; Connect power supply, variable resistance circuit, data collecting card and protective resistance R successively again
x, protective resistance R
xbe connected with power cathode;
Step 2) conductive foil (1) is arranged on the fast propellant surface of combustion to be measured;
Step 3) lights propellant;
Tinsel (3) in conductive foil (1) blows by the aflame propellant of step 4), often blow an one metal wire (3), electric current in circuit will change, distance L between adjacent two one metal wires (3) in the time interval t of the curent change collected according to data collecting card and conductive foil (1) measures combustion speed V, the propellant burning rate V=L/t of propellant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510452791.6A CN105021764A (en) | 2015-07-28 | 2015-07-28 | Circuit for measuring combustion speed of solid propellant and measurement method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510452791.6A CN105021764A (en) | 2015-07-28 | 2015-07-28 | Circuit for measuring combustion speed of solid propellant and measurement method thereof |
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| CN105021764A true CN105021764A (en) | 2015-11-04 |
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| CN201510452791.6A Pending CN105021764A (en) | 2015-07-28 | 2015-07-28 | Circuit for measuring combustion speed of solid propellant and measurement method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280101A (en) * | 2020-09-28 | 2022-04-05 | 中国科学院理化技术研究所 | Combustion wave velocity detection device and method of temperature response variable resistance mechanism |
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| US4410470A (en) * | 1981-01-07 | 1983-10-18 | The United States Of America As Represented By The Secretary Of The Army | Increasing burning rate of solid propellants by electric field effects |
| CN87200806U (en) * | 1987-01-23 | 1987-10-21 | 胡超凡 | Automatic speed-regulating device for electric fan |
| CN101975125A (en) * | 2010-10-09 | 2011-02-16 | 南京理工大学 | Device for measuring linear burning rate of liquid propellant in high pressure environment |
| CN104345118A (en) * | 2013-07-29 | 2015-02-11 | 西安电子科技大学 | Solid propellant multi-target wire dynamic combustion performance testing system and method thereof |
| US20150047526A1 (en) * | 2008-05-16 | 2015-02-19 | Digital Solid State Propulsion, Inc. | Electrode ignition and control of electrically ignitable materials |
| CN204882483U (en) * | 2015-07-28 | 2015-12-16 | 南京理工大学 | It fires fast circuit to measure solid propellant |
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2015
- 2015-07-28 CN CN201510452791.6A patent/CN105021764A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4410470A (en) * | 1981-01-07 | 1983-10-18 | The United States Of America As Represented By The Secretary Of The Army | Increasing burning rate of solid propellants by electric field effects |
| CN87200806U (en) * | 1987-01-23 | 1987-10-21 | 胡超凡 | Automatic speed-regulating device for electric fan |
| US20150047526A1 (en) * | 2008-05-16 | 2015-02-19 | Digital Solid State Propulsion, Inc. | Electrode ignition and control of electrically ignitable materials |
| CN101975125A (en) * | 2010-10-09 | 2011-02-16 | 南京理工大学 | Device for measuring linear burning rate of liquid propellant in high pressure environment |
| CN104345118A (en) * | 2013-07-29 | 2015-02-11 | 西安电子科技大学 | Solid propellant multi-target wire dynamic combustion performance testing system and method thereof |
| CN204882483U (en) * | 2015-07-28 | 2015-12-16 | 南京理工大学 | It fires fast circuit to measure solid propellant |
Non-Patent Citations (1)
| Title |
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| 李传大等: "单片机在火药燃速测定仪上的应用", 《单片机在火药燃速测定仪上的应用》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280101A (en) * | 2020-09-28 | 2022-04-05 | 中国科学院理化技术研究所 | Combustion wave velocity detection device and method of temperature response variable resistance mechanism |
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Application publication date: 20151104 |