CN201897527U - Constant current type time sequence control ignition device - Google Patents
Constant current type time sequence control ignition device Download PDFInfo
- Publication number
- CN201897527U CN201897527U CN2010206320227U CN201020632022U CN201897527U CN 201897527 U CN201897527 U CN 201897527U CN 2010206320227 U CN2010206320227 U CN 2010206320227U CN 201020632022 U CN201020632022 U CN 201020632022U CN 201897527 U CN201897527 U CN 201897527U
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- control
- constant current
- ignition
- main frame
- computer control
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Abstract
The utility model provides a constant current type time sequence control ignition device, which comprises a computer control host machine, a man-machine conversation touch screen, a digital-to-analog (D/A) converter, an external physical short circuit ring, a digital control type constant current source and an ignition output control switch, wherein the external physical short circuit ring controls the work state of an input/output (I/O) interface of the computer control host machine, the man-machine conversation touch screen transmits time sequence signals to the computer control host machine, the computer control host machine displays the work state of the ignition device through the man-machine conversation touch screen, the computer control host machine transmits control signals to the ignition output control switch and the D/A converter according to the time sequence signals, the D/A converter converts the received digital control signals into voltage control signals to be transmitted to the digital control type constant current source, the digital control type constant current source outputs ignition current through the ignition output control switch. The constant current type time sequence control ignition device adopts the constant current type ignition, so that the constancy and the controllability of current obtained by ignition elements can be realized, and the reliable ignition of the ignition elements is realized.
Description
Technical field
The utility model belongs to the rocket engine technical field of measurement and test, is specially a kind of constant current mode sequential control portfire.
Background technology
At present, what existing rocket engine ground experiment sparking mode great majority adopted is the constant voltage sparking mode, and the constant voltage sparking mode is long service time, and comparative maturity implements also comparatively simple.But the constant voltage sparking mode has two shortcomings clearly:
1) can not guarantee point duration and degree of heating electric current enough and unique.Generally when carrying out ignition operation, to pass through equipment such as firing cable, various safety switches between from the lighter to igniter head, will increase the resistance in the ignition circuit thus, because the difference of each operation and material, resistance also can occur inconsistent.If use at every turn that the igniting of same voltage just can not guarantee to light a fire reliably; If carry out resistance measurement at every turn, carry out the adjustment of voltage then, the problem of bringing one is the comparatively loaded down with trivial details and safety (because igniter head be can not hot line job) inadequately of work, the 2nd, present national standard requires ignition voltage to be no more than 30V, and the constant voltage sparking mode usually can not satisfy the igniting standard-required;
2) can not solve and avoid igniter head short circuit problem.Because after ignition operation finishes, appearance point duration and degree of heating short circuit phenomenon sometimes, if adopt the constant voltage mode to light a fire, this moment, electric current increased rapidly, can be easy to cause lighter and damage fault, caused experimental circuit to be interrupted and the failure of an experiment occurred;
In addition, the control mode of present portfire mostly is manual mode, and can only realize the simple function of lighting a fire, can not be with other equipment linkages.Because the diversified development of rocket engine, many outside control kind equipments of regulating such as each quasi-controller, by-pass valve control and instrument have been increased in the experiment, these equipment in use all require to realize interlock with portfire, and requirement can realize automation mechanized operation, and the irrealizable requirement of experiment of present lighter.
The utility model content
The technical matters that solves
For solving the technical matters that exists in the prior art, the utility model proposes a kind of constant current mode sequential control portfire.Concrete technical scheme is as follows:
Technical scheme
Described a kind of constant current mode sequential control portfire is characterized in that: comprise computer control main frame, man-machine conversation touch-screen, D/A converter, external physical short-circuited conducting sleeve, digital control type constant current source and igniting output control switch; The duty of external physical short-circuited conducting sleeve control computer main control system I/O interface, computer control main frame are determined the duty of external physical short-circuited conducting sleeve by the duty of inquiry I/O interface; Man-machine conversation touch-screen transmission time sequence signal is given the computer control main frame, and the computer control main frame is by the duty of man-machine conversation screen displaying portfire; To igniting output control switch and D/A converter transmission of control signals, D/A converter is converted to voltage control signal with the digital controlled signal of accepting and is transferred to the digital control type constant current source computer control main frame according to clock signal; The digital control type constant current source is by igniting output control switch output initial firing current.
Described a kind of constant current mode sequential control portfire, preferred described portfire also includes the external status by-pass cock, and the computer control main frame is according to clock signal control external status by-pass cock.
Beneficial effect
The utility model provides a kind of safety and reliability, and control is simple, uses flexibly the intelligent sequential control lighter that can control automatically.Adopt the man-machine conversation touch screen design, make things convenient for the user to carry out the parameter setting, and can allow the duty of user's Real Time Observation lighter; Adopt the external physical short-circuited conducting sleeve, can evade the mis-ignition that causes owing to factors such as static and maloperations, thereby guaranteed safety of ignition and reliability; Adopt current constant that the current constant mode igniting can realize that igniting element obtains and controlled, realize the reliable ignition of igniting element; Learn according to Ohm law, adopt the current constant mode igniting, when igniting element hot wire resistance trended towards 0, this moment, the priming supply acting was 0, therefore can ensure whole safety of ignition fully, thereby avoid causing the Circuits System fault because of the igniting element short circuit; Can realize the control of external control devices, and can form sequential with firing command and realize control automatically.
Description of drawings
Fig. 1: the structured flowchart of constant current mode sequential control portfire.
Embodiment
Below in conjunction with specific embodiment the utility model is described.
Embodiment:
Constant current mode sequential control portfire comprises computer control main frame, man-machine conversation touch-screen, D/A converter, external physical short-circuited conducting sleeve, digital control type constant current source, igniting output control switch and external status by-pass cock in the present embodiment.
The man-machine conversation touch-screen links to each other with the computer control main frame, by the man-machine conversation touch-screen, user's requirement is transferred to the computer control main frame according to clock signal, and wherein clock signal comprises igniting countdown duration, initial firing current, igniting begins and the unlatching and the shut-in time of shut-in time, external status by-pass cock; On the man-machine conversation touch-screen then to the working status parameter of user feedback portfire: comprise whether the external physical short-circuited conducting sleeve closes, the duty of the countdown of lighting a fire, initial firing current, portfire.
The external physical short-circuited conducting sleeve is the security insurance mechanism of constant current mode sequential control portfire, guarantees that external interference and maloperation can the trigger point duration and degree of heatings.The external physical short-circuited conducting sleeve links to each other with the computer control main frame, and whether the I/O interface of external physical short-circuited conducting sleeve control computer main control system ground connection, and the computer control main frame is realized the inquiry of external physical short-circuited conducting sleeve duty by the state of inquiry I/O interface; When the external physical short-circuited conducting sleeve was connected, the I/O interface of computer control main frame was a ground state, and computer control this moment main frame is not carried out output function; When the external physical short-circuited conducting sleeve disconnected, the I/O interface of computer control main frame was vacant state, and computer control this moment main frame is carried out output function.
The digital control type constant current source links to each other with the computer control main frame by D/A converter, is transferred to the digital control type constant current source after the control signal that D/A converter sends the computer control main frame is changed.
Igniting output control switch and external status by-pass cock link to each other with the computer control main frame respectively for the control actuator, by the break-make of computer control host computer control igniting output control switch and external status by-pass cock.When having only the igniting output control switch to connect, just can realize the engine ignition function; When also having only the external status by-pass cock to connect, the outside controllable device that connects just can be worked.
The digital control type constant current source that adopts in the present embodiment is digital program controlled 0 to the continuously adjustable constant current source of 10A, output source as initial firing current in the portfire, this satisfies the demand of rocket motor ignition fully, and simultaneously according to national standard, the design of igniting output voltage is no more than 30V.The FX2N-16MT type CPU that the computer control main frame adopts sends timing control signal according to the requirement of user's input, and it is the sequential of 5ms that minimum interval can be provided, and the output time precision reaches ± 3ms.What D/A converter adopted is that precision is 0.001 voltage-type D/A transducer, and the voltage signal that the digital controlled signal that the computer control main frame can be sent is converted to 1～5V is transferred to the digital control type constant current source.
The user at first connects the external physical short-circuited conducting sleeve when using the utility model, make computer control main frame I/O interface be in ground state, and the computer control main frame is not carried out output function; Then by the man-machine conversation touch-screen igniting countdown duration, initial firing current are set, igniting begins and the unlatching and the shut-in time of shut-in time, external status by-pass cock, form clock signal and also be transferred to the computer control main frame; Secondly disconnecting external physics short-circuited conducting sleeve makes computer control main frame I/O interface be in vacant state, allows the computer control main frame to carry out output function; The customer requirements that is provided with before showing on the man-machine conversation this moment touch-screen and the state of external physical short-circuited conducting sleeve; At last by the signal of man-machine conversation touch-screen to computer control main frame input starting ignition sequential, the computer control main frame sends control signal according to the clock signal of previous input to igniting output control switch and external status by-pass cock, and send control signal to the digital control type constant current source by D/A converter, when reaching the duration of ignition of setting, computer control host computer control igniting output control switch is connected, the digital control type constant current source sends initial firing current as requested, realizes igniting.At other during as the unlatching of igniting shut-in time, external status by-pass cock and shut-in time, the computer control main frame requires to control correspondingly switch on and off according to clock signal, thereby reach the purpose that sequential realizes automatic control is formed in the control and the firing command of external control devices.
Claims (2)
1. a constant current mode sequential control portfire is characterized in that: comprise computer control main frame, man-machine conversation touch-screen, D/A converter, external physical short-circuited conducting sleeve, digital control type constant current source and igniting output control switch; The duty of external physical short-circuited conducting sleeve control computer main control system I/O interface, computer control main frame are determined the duty of external physical short-circuited conducting sleeve by the duty of inquiry I/O interface; Man-machine conversation touch-screen transmission time sequence signal is given the computer control main frame, and the computer control main frame is by the duty of man-machine conversation screen displaying portfire; To igniting output control switch and D/A converter transmission of control signals, D/A converter is converted to voltage control signal with the digital controlled signal of accepting and is transferred to the digital control type constant current source computer control main frame according to clock signal; The digital control type constant current source is by igniting output control switch output initial firing current.
2. a kind of constant current mode sequential control portfire according to claim 1, it is characterized in that: described portfire also includes the external status by-pass cock, and the computer control main frame is according to clock signal control external status by-pass cock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206320227U CN201897527U (en) | 2010-11-25 | 2010-11-25 | Constant current type time sequence control ignition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206320227U CN201897527U (en) | 2010-11-25 | 2010-11-25 | Constant current type time sequence control ignition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201897527U true CN201897527U (en) | 2011-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206320227U Expired - Lifetime CN201897527U (en) | 2010-11-25 | 2010-11-25 | Constant current type time sequence control ignition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201897527U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072817A (en) * | 2010-11-25 | 2011-05-25 | 西北工业大学 | Device and method for controlling ignition by constant-current time sequence |
| CN111366045A (en) * | 2020-03-18 | 2020-07-03 | 北京东方计量测试研究所 | Initiating explosive device equivalent device and device |
-
2010
- 2010-11-25 CN CN2010206320227U patent/CN201897527U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072817A (en) * | 2010-11-25 | 2011-05-25 | 西北工业大学 | Device and method for controlling ignition by constant-current time sequence |
| CN102072817B (en) * | 2010-11-25 | 2012-05-16 | 西北工业大学 | Device and method for controlling ignition by constant-current time sequence |
| CN111366045A (en) * | 2020-03-18 | 2020-07-03 | 北京东方计量测试研究所 | Initiating explosive device equivalent device and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110713 Effective date of abandoning: 20120516 |