CN105277742A - Temperature-controlled accelerometer combination device - Google Patents
Temperature-controlled accelerometer combination device Download PDFInfo
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- CN105277742A CN105277742A CN201510744421.XA CN201510744421A CN105277742A CN 105277742 A CN105277742 A CN 105277742A CN 201510744421 A CN201510744421 A CN 201510744421A CN 105277742 A CN105277742 A CN 105277742A
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Abstract
A temperature-controlled accelerometer combination device comprises a heat insulation shell, a combination body mounted inside the heat insulation shell, and a temperature control circuit. The mounting body of the combination body is of a hexahedral structure, wherein the left side face, the front side face and the top face are respectively equipped with an X-axis accelerometer, a Y-axis accelerometer and a Z-axis accelerometer, the right side face and the rear door surface are each coated with a heating film II, and the upper and lower parts of the mounting body are each equipped with a temperature control sensor II. The left side face, the front side face and the top face of the heat insulation shell are each coated with a heating film I, and a temperature control sensor I is arranged in the cavity of the heat insulation shell. The temperature control circuit comprises a combination environment temperature control unit and a combination body temperature control unit, which are respectively connected with the temperature control sensors and the heating films of the heat insulation shell and the combination body through test cables. The combination device is of high heating efficiency and good effect. Heating is quick, and the internal temperature is stable. The device is not affected by a complex environment, and can satisfy the best test environment temperature of a system having strict requirement on the test precision.
Description
Technical field
The present invention relates to a kind of attemperating unit, especially for the controllable temperature accelerometer combination unit controlling accelerometer operating ambient temperature.
Background technology
Accelerometer is a kind of sensor measuring electronic equipment acceleration, also referred to as acceleration transducer.In inertial technology, the acceleration of system all can not be directly measured, but is converted into measurable physical quantity by the velocity variations that some physical devices are experienced.In fact, accelerometer is exactly carry out by sensitive element the physical quantity that indirect inspection obtains, and this amount is referred to as inertial force or moment of inertia.
Quartz flexible accelerometer (hereinafter referred to as accelerometer) belongs to force feedback type accelerometer, it is a kind of sensor of sensitive acceleration, especially responsive to temperature variation, although accelerometer can be tested under each state of temperature, but best test environment temperature is 55 DEG C, requiring in strict system to measuring accuracy, great majority all adopt 55 DEG C ± 2 DEG C as the test environment temperature of accelerometer; Therefore in order to reach the measuring accuracy of accelerometer, the test environment temperature of degree of will speed up meter is often needed to bring up to 55 DEG C ± 2 DEG C, and according to investigations, heat to a system with accelerometer, the needs 45min consuming time from 20 DEG C to 55 DEG C, is heated to 55 DEG C at least needs 122min if is-40 DEG C under extreme conditions, because warm-up time is long, not only time-consuming bothersome, and be subject to complex environment impact, easily lose first chance afield.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of controllable temperature accelerometer combination unit, to overcome the deficiency existing for above-mentioned prior art.
The technical scheme that the present invention takes is: a kind of controllable temperature accelerometer combination unit, and comprise lagging casing, combined body and temperature-control circuit, described combined body is arranged in lagging casing;
Described combined body comprises base and is arranged on the fixing body on base, described fixing body is hexahedron structure, three faces settle X-axis accelerometer, Y-axis accelerometer and Z axis accelerometer respectively for its left surface, leading flank and end face, the hexahedral right flank of fixing body and rear door surface
oncover heating film II, the upper and lower part set temperature control sensor II respectively of fixing body;
Described lagging casing is also hexahedron structure, comprise shell body and inner housing, heat-insulation layer is provided with between shell body and inner housing, three faces that the left surface of shell body, leading flank and end face are namely corresponding with X-axis accelerometer, Y-axis accelerometer and Z axis accelerometer are coated with heating film I, and the inner chamber set temperature of inner housing controls sensor I;
Described temperature-control circuit, for controlling the temperature of lagging casing and combined body, comprises combination environment temperature control unit and combined body temperature control unit:
Combination environment temperature control unit for controlling lagging casing environment temperature is connected with the temperaturecontrol sensor I in lagging casing and heating film I circuit by test cable, and the duty of the Data Control heating film I fed back by temperaturecontrol sensor I;
Combined body temperature control unit for control combination body temperature is connected with the temperaturecontrol sensor II in combined body and heating film II circuit by test cable, and the duty of the Data Control heating film II fed back by temperaturecontrol sensor II.
Its further technical scheme is: described combination environment temperature control unit is identical with principle with the circuit structure of combined body temperature control unit, comprise operational amplifier U, power tube Q and resistance bridge, the input end of described resistance bridge connects reference voltage, the output terminal of resistance bridge is connected respectively by 2 pin of resistance R7 and resistance R8 and operational amplifier U and 3 pin, 6 pin of operational amplifier U are connected with the base stage of power tube Q by resistance R9, the grounded emitter of power tube Q, contact resistance R10 between the base stage of power tube Q and ground, the collector contact resistance R6 of power tube Q, wherein resistance R6 is heating film resistance,
Described resistance bridge is made up of resistance R1, resistance R2, resistance R3 and resistance R4, and wherein resistance R2 is negative tempperature coefficient thermistor, i.e. temperaturecontrol sensor II resistance;
In the circuit of combinations thereof environment temperature control module and combined body temperature control unit, described power tube Q adopts model to be the triode of 3DD164D, and the reference voltage that the input end of resistance bridge connects is obtained by the diode 2DW230 of band compensate function.
Further: the surface that described lagging casing shell body and combined body fixing body cover heating film is plano-concave structure, and the resistance of described heating film I and heating film II is 10 Ω.
Be provided with between described fixing body and base for heat insulation backing plate, described backing plate employing good heat-insulation effect, the glass mat that temperature coefficient is less are made.
Owing to adopting technique scheme, the controllable temperature accelerometer combination unit of the present invention has following beneficial effect:
1. because the temperature-control circuit of this controllable temperature accelerometer combination unit comprises combination environment temperature control unit and combined body temperature control unit, and be connected with the heating film of lagging casing and combined body and temperaturecontrol sensor circuit, by the duty of the Data Control heating film of temperaturecontrol sensor feedback, when environment temperature exceedes+55 DEG C, system (heating film) stops heating, when in combining, temperature is lower than+50 DEG C, system (heating film) is heated again, until end-of-job, thus can guarantee that working temperature stablizes the best test environment temperature be between+50 DEG C ~+55 DEG C,
2. because the combined body with accelerometer is arranged in lagging casing by this controllable temperature accelerometer combination unit, lagging casing is double-decker, interlayer establishes insulation material, insulation backing plate is provided with between fixing body and base, whole device high insulating effect, internal temperature are stable, do not affect by complex environment;
3. the surface covering heating film due to lagging casing shell body and combined body fixing body is plano-concave structure, and the efficiency of heating surface is high, effective, rate of warming fast (from-40 DEG C be heated to assigned temperature+50 DEG C time≤10min);
4. this controllable temperature accelerometer combination unit has small volume, applied range, (can be applicable to multiple field, as vehicular weapons system location, north finder, tiltmeter etc.); In addition due to housing high insulating effect, warm-up time is short, make housing environment temperature stabilization, greatly reduce the impact of temperature variation on accelerometer, improve the stability of accelerometer, built-in high-precision accelerometer (precision can reach 3/100000ths) can be guaranteed, meet demand measuring accuracy being required to strict system.
Be further described below in conjunction with the technical characteristic of drawings and Examples to the controllable temperature accelerometer combination unit of the present invention.
Accompanying drawing explanation
Fig. 1 ~ Fig. 2 is the controllable temperature accelerometer combination unit structural representation of the present invention:
Fig. 1 is one-piece construction schematic diagram, and Fig. 2 is entity connection diagram;
Fig. 3 is lagging casing structural representation;
Fig. 4 is combined body structural representation;
Fig. 5 is fixing body structural representation (display Y-axis accelerometer, Z axis accelerometer and heating film II);
Fig. 6 is controllable temperature accelerometer combination unit control principle block diagram;
Fig. 7 is temperature-control circuit schematic diagram;
In figure:
1-lagging casing, 11-shell body, 12-heat-insulation layer, 13-inner housing, 14-temperaturecontrol sensor I, 15-heating film I;
2-combined body, 21-base, 22-backing plate, 23-fixing body, 24-heating film II, 25-temperaturecontrol sensor II, 26-X-axis accelerometer, 27-Y-axis accelerometer, 28-Z axis accelerometer;
3-temperature-control circuit, 31-combination environment temperature control unit, 32-combined body temperature control unit, 33-accelerometer data collecting unit;
4-test cable.
Embodiment
A kind of controllable temperature accelerometer combination unit, comprise lagging casing 1, combined body 2 and temperature-control circuit 3, described combined body 2 is arranged in lagging casing 1;
Described combined body 2 comprises base 21 and is arranged on the fixing body 23 on base, described fixing body is hexahedron structure, three faces settle X-axis accelerometer 26, Y-axis accelerometer 27 and Z axis accelerometer 28 respectively for its left surface, leading flank and end face, namely the left surface of hexahedron structure X axis settles X-axis accelerometer 26, the leading flank of Y-axis settles Y-axis accelerometer 27, the end face of Z-axis direction settles Z axis accelerometer 28, the surface of the hexahedral right flank of fixing body and rear door, the i.e. right flank of hexahedron structure X axis and the trailing flank of Y-axis
oncover heating film II 24, the upper and lower part set temperature control sensor II 25 respectively of fixing body;
Described lagging casing 1 is also hexahedron structure, comprise shell body 11 and inner housing 13, heat-insulation layer 12 is provided with between shell body and inner housing, three faces that the left surface of shell body, leading flank and end face are namely corresponding with X-axis accelerometer 11, Y-axis accelerometer 12 and Z axis accelerometer 13 are coated with heating film I 15, and the inner chamber set temperature of inner housing controls sensor I 14;
Described temperature-control circuit 3, for controlling the temperature of lagging casing and combined body, comprises combination environment temperature control unit 31 and combined body temperature control unit 32:
Combination environment temperature control unit 31 for controlling lagging casing environment temperature is connected with the temperaturecontrol sensor I in lagging casing 1 and heating film I circuit by test cable 4, and the duty of the Data Control heating film I fed back by temperaturecontrol sensor I;
Combined body temperature control unit 32 for control combination body temperature is connected with the temperaturecontrol sensor II in combined body and heating film II circuit by test cable 4, and the duty of the Data Control heating film II fed back by temperaturecontrol sensor II.
Described combination environment temperature control unit 31 is identical with principle with the circuit structure of combined body temperature control unit 32, comprise operational amplifier U, power tube Q and resistance bridge, the input end of described resistance bridge connects reference voltage, 2 pin of operational amplifier U are connected with the output terminal of resistance bridge with resistance R8 respectively by resistance R7 with 3 pin, 6 pin of operational amplifier U are connected with the base stage of power tube Q by resistance R9, the grounded emitter of power tube Q, contact resistance R10 between the base stage of power tube Q and ground, the collector contact resistance R6 of power tube Q, wherein resistance R6 is heating film resistance,
Described resistance bridge is made up of resistance R1, resistance R2, resistance R3 and resistance R4, and wherein resistance R2 is negative tempperature coefficient thermistor, i.e. temperaturecontrol sensor II resistance;
In the circuit of combinations thereof environment temperature control module 31 and combined body temperature control unit 32, described power tube Q adopts model to be the triode of 3DD164D, and the reference voltage that the input end of resistance bridge connects is obtained by the diode 2DW230 of band compensate function.
The surface that described lagging casing shell body and combined body fixing body cover heating film is plano-concave structure, and the resistance of described heating film I 15 and heating film II 24 is 10 Ω.
Be provided with between described fixing body 23 and base 21 for heat insulation backing plate 22, described backing plate employing good heat-insulation effect, the glass mat that temperature coefficient is less are made.
using method and principle of work
The combination environment temperature control unit of this device and combined body temperature control unit and reference power supply are connected, the X-axis accelerometer of this device, Y-axis accelerometer are connected with external data acquisition system with Z axis accelerometer.
Under normal temperature state, control three heating films I in insulation shell heat by combination environment temperature control unit, combined body temperature control unit controls two heating films II in body combination 2 and heats:
When air themperature exceedes+55 DEG C in insulation shell, feed back to combination environment temperature control unit by temperaturecontrol sensor I and three heating films I stopping in insulation shell heated,
When combined body temperature exceedes+55 DEG C, feed back to combined body temperature control unit by temperaturecontrol sensor II and two heating films II stopping in combined body is heated.
Be now the best test environment of accelerometer, the data of external data acquisition system to X-axis accelerometer, Y-axis accelerometer and Z axis accelerometer gather
.
When insulation shell environment temperature is lower than+50 DEG C, control three heating films I in insulation shell by temperaturecontrol sensor I feedback composition environment temperature control module to heat, when combined body temperature is lower than+50 DEG C, feeds back to two heating films II in combined body temperature control unit control combination body by temperaturecontrol sensor II and heat; Guarantee that the working temperature of all accelerometers is more than 50 DEG C.
the circuit theory of combination environment temperature control unit and combined body temperature control unit:
Utilize operational amplifier U to form voltage comparator, resistance R1 ~ resistance R4 forms resistance bridge, and resistance R2 is negative temperature coefficient (N.T.C) thermistor.By selecting the resistance of resistance R1 ~ resistance R4, make when temperature is lower, resistance R2 resistance is larger, operational amplifier U2 pin voltage is higher than 3 pin voltages, i.e. Va > Vb, its output voltage Vc is positive voltage, power tube Q conducting, resistance R6(and heating film) there is electric current to pass through heating of starting working; When (lagging casing or combined body) temperature raises, resistance R2 resistance diminishes, pressure drop Va on resistance R2 diminishes, until during Va=Vb, operational amplifier U exports Vc upset, and Vc is negative voltage, power tube Q ends, resistance R6(and heating film) upper pressure drop is 0V, stops heating, thus reaches temperature control object.
Claims (4)
1. a controllable temperature accelerometer combination unit, is characterized in that: comprise lagging casing (1), combined body (2) and temperature-control circuit (3), described combined body is arranged in lagging casing;
Described combined body (2) comprises base (21) and is arranged on the fixing body (23) on base, described fixing body is hexahedron structure, its left surface, leading flank and end face three faces are settled respectively X-axis accelerometer (26), Y-axis accelerometer (27) and Z axis accelerometer (28), the hexahedral right flank of fixing body and rear door surface
oncover heating film II (24), the upper and lower part set temperature control sensor II (25) respectively of fixing body;
Described lagging casing (1) is also hexahedron structure, comprise shell body (11) and inner housing (13), heat-insulation layer (12) is provided with between shell body and inner housing, three faces that the left surface of shell body, leading flank and end face are namely corresponding with X-axis accelerometer, Y-axis accelerometer and Z axis accelerometer are coated with heating film I (15), and the inner chamber set temperature of inner housing controls sensor I (14);
Described temperature-control circuit (3), for controlling the temperature of lagging casing and combined body, comprises combination environment temperature control unit (31) and combined body temperature control unit (32):
Combination environment temperature control unit (31) for controlling lagging casing environment temperature is connected with the temperaturecontrol sensor I in lagging casing (1) and heating film I circuit by test cable (4), and the duty of the Data Control heating film I fed back by temperaturecontrol sensor I;
Combined body temperature control unit (32) for control combination body temperature is connected with the temperaturecontrol sensor II in combined body and heating film II circuit by test cable (4), and the duty of the Data Control heating film II fed back by temperaturecontrol sensor II.
2. controllable temperature accelerometer combination unit according to claim 1, it is characterized in that: described combination environment temperature control unit (31) is identical with principle with the circuit structure of combined body temperature control unit (32), comprise operational amplifier U, power tube Q and resistance bridge, the input end of described resistance bridge connects reference voltage, the output terminal of resistance bridge is connected respectively by 2 pin of resistance R7 and resistance R8 and operational amplifier U and 3 pin, 6 pin of operational amplifier U are connected with the base stage of power tube Q by resistance R9, the grounded emitter of power tube Q, contact resistance R10 between the base stage of power tube Q and ground, the collector contact resistance R6 of power tube Q, wherein resistance R6 is heating film resistance,
Described resistance bridge is made up of resistance R1, resistance R2, resistance R3 and resistance R4, and wherein resistance R2 is negative tempperature coefficient thermistor, i.e. temperaturecontrol sensor II resistance;
In the circuit of combinations thereof environment temperature control module (31) and combined body temperature control unit (32), power tube Q adopts model to be the triode of 3DD164D, and the reference voltage that the input end of resistance bridge connects is obtained by the diode 2DW230 of band compensate function.
3. controllable temperature accelerometer combination unit according to claim 1 and 2, it is characterized in that: the surface that described lagging casing shell body and combined body fixing body cover heating film is plano-concave structure, and the resistance of described heating film I (15) and heating film II (24) is 10 Ω.
4. controllable temperature accelerometer combination unit according to claim 3, it is characterized in that: be provided with for heat insulation backing plate (22) between described fixing body (23) and base (21), described backing plate employing good heat-insulation effect, the glass mat that temperature coefficient is less are made.
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|---|---|---|---|
| CN201510744421.XA CN105277742A (en) | 2015-11-05 | 2015-11-05 | Temperature-controlled accelerometer combination device |
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|---|---|---|---|
| CN201510744421.XA CN105277742A (en) | 2015-11-05 | 2015-11-05 | Temperature-controlled accelerometer combination device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108205065A (en) * | 2016-12-19 | 2018-06-26 | 航天科工惯性技术有限公司 | A kind of accelerometer heats piece |
| CN108363430A (en) * | 2017-12-27 | 2018-08-03 | 北京航天时代光电科技有限公司 | A kind of temperature control device and its temperature control method of high-precision quartz accelerometer |
| CN112611392A (en) * | 2020-10-29 | 2021-04-06 | 北京航天时代激光导航技术有限责任公司 | Intelligent precise temperature control device of accelerometer |
| CN115656538A (en) * | 2022-09-15 | 2023-01-31 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Two-stage temperature control quartz flexible accelerometer structure |
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| CN203812115U (en) * | 2014-04-28 | 2014-09-03 | 上海融军科技有限公司 | Heat insulation temperature regulating device of laser gyroscope |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108205065A (en) * | 2016-12-19 | 2018-06-26 | 航天科工惯性技术有限公司 | A kind of accelerometer heats piece |
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| CN108363430A (en) * | 2017-12-27 | 2018-08-03 | 北京航天时代光电科技有限公司 | A kind of temperature control device and its temperature control method of high-precision quartz accelerometer |
| CN112611392A (en) * | 2020-10-29 | 2021-04-06 | 北京航天时代激光导航技术有限责任公司 | Intelligent precise temperature control device of accelerometer |
| CN115656538A (en) * | 2022-09-15 | 2023-01-31 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Two-stage temperature control quartz flexible accelerometer structure |
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Application publication date: 20160127 |