CN102325390A - Automatic control system for thermal testing infrared radiation heater of spatial camera and method - Google Patents
Automatic control system for thermal testing infrared radiation heater of spatial camera and method Download PDFInfo
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- CN102325390A CN102325390A CN201110095524A CN201110095524A CN102325390A CN 102325390 A CN102325390 A CN 102325390A CN 201110095524 A CN201110095524 A CN 201110095524A CN 201110095524 A CN201110095524 A CN 201110095524A CN 102325390 A CN102325390 A CN 102325390A
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Abstract
The invention relates to an automatic control system for a thermal testing infrared radiation heater of a spatial camera and a method, belonging to the field of industrial automation. A closed-loop control system of the infrared radiation heater is formed by a controller (1), a motor drive circuit (2), a location sensing and processing circuit (3), an implementation circuit (4), a power supply (5), a stepper motor (6) and a signal conditioning circuit (7), and is connected with the spatial camera and the infrared radiation heater for automatic control of opening and closing of the heater. The cost of the original method is reduced, the workload of the testing personnel is decreased, the defects caused by motor locking are avoided, and the reliability of the control system is improved.
Description
Technical field
The invention belongs to the industrial automation field; Relate to a kind of infrared radiation heater automatic control system and the method for (comprising that mainly infrared heating cage, infrared lamp etc. are through equipment infrared or that far infrared radiation heats testpieces), especially be applied to the automatic control system and the method for the infrared radiation heater opened/closed of space camera heat test.
Background technology
Space camera is placed on the shooting task of accomplishing on the spacecrafts such as satellite or airship ground scenery, is the important load of spacecraft.Space camera is in orbit the time, will be in for a long time in high vacuum, the cold black and thermal radiation environment.For make space camera can be in these harsh and unforgiving environments operate as normal, in development process, must carry out each item test under sufficient high vacuum, the cold black and space heat flux environmental condition to it according to various test specifications or standard.For real simulation camera environment in orbit, generally be employed in and place the space heat flux that infrared radiation heater comes the analogue camera surface in the vacuum tank on ground.Because space camera needs in test shooting, the infrared radiation heater that therefore requires to regard to camera light hole one side can rotate around the fixed axis that is installed on a side.Under the situation that camera is not made a video recording, infrared radiation heater is in the close position (being that infrared radiation heater blocks camera light hole position), with the outer hot-fluid of virtual space; Infrared radiation heater need rotate around fixed axis when camera is made a video recording, and opens to enable possition (being generally with respect to the position of make position greater than 90 degree), in order to avoid block the light of camera.Therefore need carry out opened/closed control to infrared radiation heater.
Present infrared radiation heater opened/closed control method need be arranged operating personnel's switch motor power and pole changer; Monitor signal lamp on/off state is judged whether heater moves and is put in place; Do not have a powered-down if operating personnel were slow in reacting when signal lamp was bright, also can cause the stall phenomenon of motor.Because heat test is chronic, obvious this phenomenon possibly cause damage to motor or other associated mechanical structures.Present method needs instrumentations such as signal generator simultaneously, makes that the The whole control system cost is higher.Therefore need a kind of low cost badly, can substitute manual operation and have the autocontrol method of the infrared radiation heater of high reliability.
Summary of the invention
The automatic control system and the method that the purpose of this invention is to provide a kind of space camera heat test infrared radiation heater opened/closed; Reduce the cost of original method; Reduce test operation personnel's workload, the disadvantage of avoiding motor rotation blockage to bring, the reliability of raising control system.
To achieve these goals, technical scheme of the present invention is following:
The automatic control system of space camera heat test infrared radiation heater comprises controller, motor-drive circuit, location aware and treatment circuit, executive circuit, power supply, stepping motor and signal conditioning circuit;
Said signal conditioning circuit links to each other with controller, and space camera power supply signal is gathered and handled to signal conditioning circuit in real time, and formation controller can be distinguished first signal of state;
Said location aware and treatment circuit link to each other with controller; Location aware and treatment circuit are divided into identical two-way; Correspond respectively to the unlatching and the make position of heater; Location aware and treatment circuit are gathered the present residing position signalling of heater in real time, handle the secondary signal that the back formation controller can be distinguished state;
Said controller links to each other with executive circuit with motor-drive circuit respectively; First signal and secondary signal are monitored and analyzed to controller in real time, sends the stepping motor control signal and send on the stepping motor/following electric control signal to executive circuit to motor-drive circuit according to analysis result;
Said motor-drive circuit links to each other with stepping motor, and motor-drive circuit is that stepping motor provides drive signal;
Said stepping motor drives infrared radiation heater and rotates around fixed axis;
Said executive circuit links to each other with stepping motor, executive circuit according on the stepping motor/following electric control signal is to stepping motor out-put supply signal;
Said power supply links to each other with signal conditioning circuit, controller, executive circuit, motor-drive circuit, location aware and treatment circuit respectively, and for they provide power supply signal.
Control method based on above-mentioned space camera heat test infrared radiation heater automatic control system comprises the steps:
A. after the infrared radiation heater automatic control system powered on, controller was accomplished initial work, and initial work comprises: send and turn-off control signal to executive circuit, make that under the executive circuit effect power supply of stepping motor is an off state; Send stop control signal and give motor-drive circuit, make motor-drive circuit not export the step motor control signal; Signal conditioning circuit is gathered space camera power supply signal in real time, and this signal is carried out the voltage conditioning, adjusts to the scope that controller can be distinguished state according to fixed proportion; Location aware and treatment circuit are divided into identical two-way; Correspond respectively to the unlatching and the make position of heater; Location aware and treatment circuit are gathered the present residing position signalling of heater in real time; And this signal is carried out voltage nurse one's health, adjust to the scope that controller can be distinguished state according to fixed proportion;
B. the output signal of monitoring control devices signal conditioning circuit; Judge whether this signal changes; Promptly whether rise to high level or drop to low level by high level by low level; Be changed to high level by low level and represent the power supply of space camera to power on, drop to low level by high level and represent under the power supply of space camera; If change then change step c over to, otherwise continue step b;
C. controller judges that it is to rise to high level by low level that the output signal of signal conditioning circuit changes, and still drops to low level by high level, if rise to high level by low level, then changes steps d over to, otherwise changes step I over to;
D. the output signal of monitoring control devices location aware and treatment circuit is judged whether heater has arrived the enable possition, if arrive, then changes step b over to, otherwise is changed step e over to;
E. controller sends electric control signal on the stepping motor to executive circuit, under the executive circuit effect, and the power supply electrifying of stepping motor;
F. controller sends one and claps the step motor control signal to motor-drive circuit, and the motor-drive circuit drive stepping motor is rotated, and makes heater rotate a step angle to opening direction;
G. the output signal of monitoring control devices location aware and treatment circuit is judged whether heater has arrived the enable possition, if arrive, then changes step h over to, otherwise is changed step f over to;
H. controller sends electric control signal under the stepping motor to executive circuit, and under the executive circuit effect, the power supply of stepping motor is electricity down, changes step b then over to;
I. the output signal of monitoring control devices location aware and treatment circuit is judged whether heater has arrived make position, if arrive, then changes step b over to, otherwise is changed step j over to;
J. controller sends electric control signal on the stepping motor to executive circuit, under the executive circuit effect, and the power supply electrifying of stepping motor;
K. controller sends one and claps the step motor control signal to motor-drive circuit, and the motor-drive circuit drive stepping motor is rotated, and makes heater rotate a step angle to closing direction;
L. the output signal of monitoring control devices location aware and treatment circuit is judged whether heater has arrived make position, if arrive, then changes step m over to, otherwise is changed step k over to;
M. controller sends electric control signal under the stepping motor to executive circuit, and under the executive circuit effect, the power supply of stepping motor is electricity down, changes step b then over to, and then the autocontrol method of implementation space camera heat test infrared radiation heater.
The invention has the beneficial effects as follows: heat test process infrared radiation heater closed-loop control system does not need the intervention of testing crew, has realized the automatic control of infrared radiation heater; When heater moved to the target location, infrared radiation heater closed-loop control system automatic cut-off motor power supply and motor control signal had solved the problem of motor rotation blockage, have improved the reliability of control system; Simple in structure, cost is low, manufactures and designs easily.
Description of drawings
Fig. 1 is the automatic control system structural representation of space camera heat test infrared radiation heater of the present invention.
Fig. 2 is signal conditioning circuit figure of the present invention.
Fig. 3 is location aware of the present invention and treatment circuit figure.
Fig. 4 is a stepping motor winding diagram of the present invention.
Fig. 5 is stepping motor A phase drive circuit figure of the present invention.
Fig. 6 is executive circuit figure of the present invention.
Fig. 7 is the program flow diagram in the controller of the present invention.
Fig. 8 is stepping motor four phase eight beat control timing figure of the present invention.
Embodiment
Below in conjunction with instance the present invention is elaborated, so that the object of the invention, characteristic and advantage are carried out more deep understanding.
As shown in Figure 1; The present invention is the infrared radiation heater closed-loop control system that is made up of controller 1, motor-drive circuit 2, location aware and treatment circuit 3, executive circuit 4, power supply 5, stepping motor 6 and signal conditioning circuit 7; Be connected on space camera and the infrared radiation heater, the unlatching and the closure of heater are controlled automatically.
The space camera that adopts in the present embodiment uses the power supply of 100V power supply, and during power supply electrifying, supply voltage rises to 100V by 0V, when power supply is electric down, drops to 0V by 100V.Signal conditioning circuit 7 is main to be accomplished and converts 100V power supply voltage signal 18 into controller 1 and can distinguish the signal 8 of state (100V voltage is corresponding to digital quantity " 1 "; 0V voltage is corresponding to digital quantity " 0 "); Mainly form, referring to Fig. 2 by bleeder circuit 22 and optocoupler circuit 23.Bleeder circuit 22 adopts the mode (wherein R1 is 240k Ω, and R2 is 10k Ω) of two resistance R 1 and R2 series connection, and power supply voltage signal 22 is carried out 25: 1 dividing potential drop, and the output signal of bleeder circuit sends photoelectrical coupler U1 to.Photoelectrical coupler U1 adopts TLP521 in the present embodiment, and R3 is 510 Ω, and R4 is 10k Ω.Photoelectrical coupler U1 isolates the ground IGND of power supply voltage signal and the ground GND of controller 1, and realizes that further converting the signal after the dividing potential drop into signal 8 is transferred to controller 1.
Location aware and treatment circuit 3 are made up of with two groups of identical treatment circuits two identical limit switches, and its output signal 11 (comprise A3 and A4, correspond respectively to closure and enable possition) sends controller 1 to.Fig. 3 has provided corresponding to the location aware of closed position and treatment circuit, is made up of limit switch circuit 24 and treatment circuit 25.Limit switch U2 adopts the D2MC-01E of OMRON company, the 12V power supply 21 of COM termination power 5 outputs of D2MC-01E, and the NO end is through connecting the ground PGND that a resistance R 5 (adopting 10k Ω resistance in the present embodiment) connects power supply 5.When heater-movement to make position, the NO of limit switch U2 end is output as 12V, and under other situation, the NO end is output as 0V.Treatment circuit 25 is made up of photoelectrical coupler U4 and associated processing circuit, the digital quantity " 1 " that realization can be discerned the 12V voltage of limit switch output corresponding to controller 1, and 0V voltage is corresponding to digital quantity " 0 ".Photoelectrical coupler U4 adopts TLP521 in the present embodiment, and R6 is 2k Ω, and R7 is 10k Ω.Treatment circuit 25 is isolated the ground PGND of limit switch signal and the ground GND of controller 1, and realizes that output signal with limit switch further converts signal A3 into and is transferred to controller 1.Equally, for the location aware and the treatment circuit of open position, realize that output signal with limit switch further converts signal A4 into and is transferred to controller 1.
The 42BYGH404 of stepping motor 6 employing Changzhou Ya Meike Bayerische Motorne Werke Aktiengeellschaft; Adopt the four phase eight beat type of drive; The mode of connection is as shown in Figure 4; Yellow and white terminal is held as COM, connects the signal 13 of executive circuit 4 outputs, and black, redness, green and blue end meet four output signal A, B, C and D (signal 10 among Fig. 1 is made up of A, B, C and D) of motor-drive circuit 2 respectively.
The output signal 10 of motor-drive circuit 2 is divided into four road A, B, C and D, is respectively four of stepping motor 6 suitable drive current is provided mutually, and four tunnel circuit is identical.The input signal 9 of motor-drive circuit 2 is provided by controller 1, and input signal 9 is made up of signal AIN, BIN, CIN and DIN.Fig. 5 has provided wherein corresponding to the motor-drive circuit of A phase, and mainly by photoelectrical coupler U6, MOSFET device U7 and diode U8 form.U6 is TLP521 in the present embodiment, and U7 is 2N6798, and U8 is 1N5806, and resistance R 8 is 510 Ω, and R9 is 1k Ω, and R10 is 5.1k Ω.The high level of the output signal AIN of controller 1 makes MOSFET device U7 conducting, and low level makes MOSFET device U7 end, thus the A of control step motor 6 mutually in the break-make of electric current.Diode U8 is used for afterflow, shields.
Executive circuit 4 is made up of relay and relay drive circuit, referring to Fig. 6.The 943-1C-5DS that relay U10 adopts HSIN DA company to produce, its armature contact connects the 12V power supply 17 of power supply 5 outputs, and the signal 13 of normally opened contact output connects the COM end of stepping motor 6.Relay drive circuit mainly is made up of triode U9 and diode U11, and U9 is S8050 in the present embodiment, and U11 is 1N5806.Resistance R 11 is 5.1k Ω, and R12 is 10k Ω.The high level of the output signal 12 of controller 1 makes U9 saturated, and then makes the actuating of relay, makes the output 13 of relay be 12V, thereby powers on for stepping motor 6, and the low level of the output signal 12 of controller 1 is cut off the power supply of stepping motor 6.Diode U11 is used for afterflow, shields.
Program in the controller 1 is accomplished by VHDL language, and Fig. 7 has provided the program flow diagram in the controller 1.After control system powered on, at first initialization of controller 1 guaranteed that signal 12 is digital quantity " 0 " (power supply for step-by-step motor is an off state), and AIN, BIN, CIN and DIN are " 0 " (not exporting the step motor control signal).Then, the state of controller 1 real-time monitor signal 8 if signal 8 changes, judges that then 8 is still trailing edges (become " 0 " by " 1 ", show under the camera power supply) of rising edge (become " 1 " by " 0 ", show that camera power supply powers on).If the 8th, rising edge judges then whether signal A4 is " 0 " (being whether heater is not in the enable possition), if be not " 0 "; Then continue the state of monitoring 8, be " 1 " (promptly opening power supply for step-by-step motor), send one and clap step motor control signal 11 otherwise put signal 12; Make stepping motor drive heater and rotate a step angle to the enable possition; Judge then whether signal A4 is 1,, then put signal 12 and be " 0 " (promptly turn-offing power supply for step-by-step motor) if be 1; Turn to the state that continues monitoring 8; Otherwise then send one and clap step motor control signal 11, make stepping motor 6 drive heater and rotate a step angle, continue then to judge whether signal A4 is 1 to the enable possition.If the 8th, trailing edge judges then whether signal A3 is " 0 " (being whether heater is not in make position), if be not " 0 "; Then continue the state of monitoring 8, be " 1 ", send one and clap the step motor control signal otherwise put signal 12; Make stepping motor 6 drive heater and rotate a step angle, judge whether signal A3 is " 1 ", if be " 1 " to make position; Then putting signal 12 is 0; Turn to the state that continues monitoring 8, rotate a step angle to make position, continue then to judge whether signal A3 is 1 otherwise make stepping motor 6 drive heater.The four phase eight beat mode is adopted in the driving of stepping motor 6; Be that stepping motor 6 is when opening direction rotates; Control signal is sent according to the order of AIN-AINBIN-BIN-BINCIN-CIN-CINDIN-DIN-DINAIN, and Fig. 8 has provided the sequential chart of four phase eight beat mode under clock signal clk in such cases.When if stepping motor 6 rotates to closing direction, then control signal is sent according to the order of AIN-AINDIN-DIN-DINCIN-CIN-CINBIN-BIN-BINAIN.CLK is 1kHz in the present embodiment, and CLK is obtained by the inner VHDL program frequency division of FPGA.
Claims (2)
1. the automatic control system of space camera heat test infrared radiation heater; It is characterized in that this control system comprises controller (1), motor-drive circuit (2), location aware and treatment circuit (3), executive circuit (4), power supply (5), stepping motor (6) and signal conditioning circuit (7);
Said signal conditioning circuit (7) links to each other with controller (1), and space camera power supply signal is gathered and handled to signal conditioning circuit (7) in real time, and formation controller (1) can be distinguished first signal of state;
Said location aware and treatment circuit (3) link to each other with controller (1); Location aware and treatment circuit (3) are divided into identical two-way; Correspond respectively to the unlatching and the make position of heater; Location aware and treatment circuit (3) are gathered the present residing position signalling of heater in real time, handle the secondary signal that back formation controller (1) can be distinguished state;
Said controller (1) links to each other with executive circuit (4) with motor-drive circuit (2) respectively; First signal and secondary signal are monitored and analyzed to controller (1) in real time, sends the stepping motor control signal and send on the stepping motor/following electric control signal to executive circuit (4) to motor-drive circuit (2) according to analysis result;
Said motor-drive circuit (2) links to each other with stepping motor (6), and motor-drive circuit (2) provides drive signal for stepping motor (6);
Said stepping motor (6) drives infrared radiation heater and rotates around fixed axis;
Said executive circuit (4) links to each other with stepping motor (6), executive circuit (4) according on the stepping motor/following electric control signal is to stepping motor (6) out-put supply signal;
Said power supply (5) links to each other with signal conditioning circuit (7), controller (1), executive circuit (4), motor-drive circuit (2), location aware and treatment circuit (3) respectively, and for they provide power supply signal.
2. based on the control method of the described space camera heat test of claim 1 infrared radiation heater automatic control system, it is characterized in that this method comprises the steps:
A. after the infrared radiation heater automatic control system powered on, controller (1) was accomplished initial work; Signal conditioning circuit (7) is gathered space camera power supply signal in real time, and this signal is carried out the voltage conditioning, adjusts to the scope that controller (1) can be distinguished state according to fixed proportion; Location aware and treatment circuit (3) are divided into identical two-way; Correspond respectively to the unlatching and the make position of heater; Location aware and treatment circuit (3) are gathered the present residing position signalling of heater in real time; And this signal is carried out voltage nurse one's health, adjust to the scope that controller (1) can be distinguished state according to fixed proportion;
B. the output signal of controller (1) monitor signal modulate circuit (7) judges whether this signal changes; If change then change step c over to, otherwise continue step b;
C. controller (1) judges that the output signal of signal conditioning circuit (7) changes, if rise to high level by low level, then changes steps d over to, otherwise changes step I over to;
D. the output signal of controller (1) monitoring location perception and treatment circuit (3) is judged whether heater has arrived the enable possition, if arrive, then changes step b over to, otherwise is changed step e over to;
E. controller (1) sends stepping motor (6) to executive circuit (4) and goes up electric control signal, under the effect of executive circuit (4), and the power supply electrifying of stepping motor (6);
F. controller (1) sends one and claps the step motor control signal to motor-drive circuit (2), and motor-drive circuit (2) drive stepping motor (6) is rotated, and makes heater rotate a step angle to opening direction;
G. the output signal of controller (1) monitoring location perception and treatment circuit (3) judges whether heater has arrived the enable possition, if arrived then change step h over to, otherwise changes step f over to;
H. controller (1) sends electric control signal under the stepping motor to executive circuit (4), and under the effect of executive circuit (4), the power supply of stepping motor (6) is electricity down, changes step b then over to;
I. the output signal of controller (1) monitoring location perception and treatment circuit (3) is judged whether heater has arrived make position, if arrive, then changes step b over to, otherwise is changed step j over to;
J. controller (1) sends electric control signal on the stepping motor to executive circuit (4), under the effect of executive circuit (4), and the power supply electrifying of stepping motor (6);
K. controller (1) sends one and claps the step motor control signal to motor-drive circuit (2), and motor-drive circuit (2) drive stepping motor (6) is rotated, and makes heater rotate a step angle to closing direction;
L. the output signal of controller (1) monitoring location perception and treatment circuit (3) is judged whether heater has arrived make position, if arrive, then changes step m over to, otherwise is changed step k over to;
M. controller (1) sends electric control signal under the stepping motor to executive circuit (4), and under the effect of executive circuit (4), the power supply of stepping motor (6) is electricity down, changes step b then over to, and then the autocontrol method of implementation space camera heat test infrared radiation heater.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110095524 CN102325390B (en) | 2011-04-15 | 2011-04-15 | Automatic control system for thermal testing infrared radiation heater of spatial camera and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110095524 CN102325390B (en) | 2011-04-15 | 2011-04-15 | Automatic control system for thermal testing infrared radiation heater of spatial camera and method |
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| CN102325390A true CN102325390A (en) | 2012-01-18 |
| CN102325390B CN102325390B (en) | 2012-12-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049786A (en) * | 2015-05-27 | 2015-11-11 | 湖北久之洋红外系统股份有限公司 | Testing auxiliary system and method for thermal infrared imagers |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101424862A (en) * | 2008-12-09 | 2009-05-06 | 中国科学院长春光学精密机械与物理研究所 | Thermal switch for heat control system of camera |
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2011
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424862A (en) * | 2008-12-09 | 2009-05-06 | 中国科学院长春光学精密机械与物理研究所 | Thermal switch for heat control system of camera |
Non-Patent Citations (2)
| Title |
|---|
| 陈荣利等: "空间相机的热分析和热设计", 《光学学报》 * |
| 韩双丽等: "空间相机热环境模拟试验的探讨", 《光学精密工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049786A (en) * | 2015-05-27 | 2015-11-11 | 湖北久之洋红外系统股份有限公司 | Testing auxiliary system and method for thermal infrared imagers |
| CN105049786B (en) * | 2015-05-27 | 2018-06-08 | 湖北久之洋红外系统股份有限公司 | Thermal infrared imager tests auxiliary system and method |
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