CN102879606A - Method and device for detecting temperature of accelerometer and determining temperature detection path - Google Patents
Method and device for detecting temperature of accelerometer and determining temperature detection path Download PDFInfo
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- CN102879606A CN102879606A CN2012102288298A CN201210228829A CN102879606A CN 102879606 A CN102879606 A CN 102879606A CN 2012102288298 A CN2012102288298 A CN 2012102288298A CN 201210228829 A CN201210228829 A CN 201210228829A CN 102879606 A CN102879606 A CN 102879606A
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Abstract
The invention provides a method for detecting a temperature of an accelerometer, which comprises the following steps of: fixing a temperature sensor at the position on an accelerometer flange plate, which is close to an accelerometer surface shell, by a thin adhesive; adhering a heating element onto the accelerometer surface shell; leading a lead of the heating element out of the lateral surface of the accelerometer; and measuring the temperature of the accelerometer by a temperature measurement module. The invention also provides a device for detecting the temperature of the accelerometer, which comprises the accelerometer, the temperature sensor, the heating element and the temperature measurement module, wherein the accelerometer is fixed at the position on the accelerometer flange plate, which is close to the accelerometer surface shell, by the thin adhesive and is used for acquiring the temperature of the accelerometer; the lead of the heating element is led out of the lateral surface of the accelerometer and is used for heating the accelerometer; and the temperature measurement module is used for acquiring the temperature of the accelerometer. By utilizing the method and the device for detecting the temperature of the accelerometer, the temperature of the accelerometer can be rapidly and accurately measured and the temperature of the accelerometer is compensated in real time, so that the navigation accuracy is improved.
Description
Technical field
The present invention relates to the temperature detection technology, particularly the method and apparatus technical field in a kind of quartz flexible accelerometer temperature detection and definite temperature detection path.
Background technology
Accelerometer is as the important devices of inertia measurement, has the precision height, long-time stability are good, are fit to the advantage of small acceleration analysis.Yet the variation of temperature directly affects the accelerometer output accuracy, therefore, need to consider that environment temperature affects accelerometer when carrying out the inertial navigation system design.Need the design temperature control system for Platform Inertial Navigation System, for accelerometer provides a working environment that temperature is relatively constant, thereby improve navigation accuracy; For strapdown inertial navitation system (SINS), need to set up temperature model, carry out real-Time Compensation, therefore should find a kind of method of temperature of Quick Measurement accelerometer.Accelerometer often comes the internal temperature of sensitive acceleration meter by built-in temperature sensor at present.
The defective of at present ACTE detection is: lack the prioritization scheme that ACTE detects the path, to the relation of the speed of the influence factor such as temperature sensor location, tackifier thickness and the component lead position of heating and sense acceleration meter temperature and indefinite, like this, so that the temperature of accelerometer inside can not in time reflect, finally affect navigation accuracy.
Summary of the invention
The object of the invention is to overcome the prior art deficiency, the method and apparatus in a kind of quartz flexible accelerometer temperature detection and definite temperature detection path is provided.
The technical solution of the method that ACTE of the present invention detects:
The method that a kind of ACTE detects may further comprise the steps:
Temperature sensor is fixed on the position of close described accelerometer surface housing on the accelerometer ring flange with thin tackifier, to heat component affixing on the housing of described accelerometer surface, the lead-in wire of the described element of heating is drawn from described accelerometer side, utilize temperature-measuring module to gather the temperature of described accelerometer.
According to the method, described temperature sensor is fixed on the described accelerometer with thin tackifier, the tackifier thickness range is 15 μ m～60 μ m.
According to the method, be the 1mm～5mm scope of the described surface of shell of span near the position of described accelerometer surface housing on the described ring flange.
According to the method, described side refers to the described accelerometer surface of shell beyond the corresponding accelerometer label location lower shell surface.
A kind of ACTE pick-up unit provided by the invention, comprise an accelerometer, one temperature sensor, it is fixed on the described accelerometer ring flange near on the shell position of described accelerometer surface, in order to obtain the temperature of described accelerometer with thin tackifier; One element of heating, its lead-in wire draws to heat for described accelerometer from described accelerometer side; One temperature-measuring module links to each other with described temperature sensor, gathers the temperature of the described accelerometer of described temperature sensor output.
This installs described temperature-measuring module and comprises that a digital collection unit is used for gathering the described ACTE of described temperature sensor output, one power supply unit is used for being described accelerometer power supply, one intensification unit links to each other with the described element of heating, and is used for providing intensification voltage for accelerometer.
This installs described intensification unit can be D.C. regulated power supply, and available voltage range is 0～30V.
The invention provides the method in a kind of determination of acceleration meter temperature fast detecting path, may further comprise the steps:
The first step, the ACTE measuring state is determined and temperature survey:
1) determines the impact factor of described ACTE measurement response time: the position that comprises at least a. temperature sensor, be fixed on center on the ring flange of described accelerometer or be used for the tackifier thickness of fixing described temperature sensor near described accelerometer surface of shell position b., the heat lead-in wire position of element of thin or thick c. is from described accelerometer front or the side lead-in wire;
2) obtain 8 kinds of ACTE measuring states according to above-mentioned 3 kinds of factor independent assortments;
3) successively every kind of state in described 8 kinds of states is carried out temperature acquisition to described accelerometer according to certain sample frequency and be warming up to design temperature;
Second step, data processing step:
Set up the single order identification model
Wherein, K is scale-up factor, T is inertia time constant, Δ U is the voltage on the element of heating, Δ T is the sampling period, utilize Recursive Extended Least Squares Method to carry out identification of Model Parameters to described single order identification model, the temperature value of described every kind of state acquisition is carried out Model Distinguish, draw K and the T value under described accelerometer different measuring state;
In the 3rd step, estimate steps in decision-making:
Determine evaluation index, the relation curve of the response time that match T/K and described ACTE are measured, it is the shortest to determine that T/K hour obtains described ACTE required time, thereby determine in described 8 kinds of states, the position of temperature sensor is fixed on the ring flange of described accelerometer near on the described accelerometer surface of shell position, the tackifier thin thickness that is used for fixing described temperature sensor, the lead-in wire position of the element of heating are the fast detecting path of measuring described ACTE from described accelerometer side lead-in wire.
The invention provides the device in a kind of determination of acceleration meter temperature detection path, comprise that the temperature survey state is determined and temperature measurement unit, data processing unit and evaluation decision package:
Described temperature survey state is determined to comprise setting state module and temperature-measuring module with temperature measurement unit, described setting state module is used for measuring according to the described ACTE of impact the factor of response time and sets 8 kinds of ACTE measuring states, and described temperature-measuring module is used for gathering successively described ACTE under described 8 kinds of states;
Described data processing unit comprises model building module and identification of Model Parameters computing module, and described model building module is used for temperature is set up the single order identification model
Wherein, K is scale-up factor, and T is inertia time constant, and Δ U is the voltage on the element of heating, Δ T is the sampling period, and described identification of Model Parameters computing module is used for utilizing Recursive Extended Least Squares Method to carry out identification to described first order modeling and draws K and the value of T under described 8 kinds of measuring states;
Described evaluation decision package is used for determining evaluation index, the relation curve of the response time that match T/K and described ACTE are measured, it is the shortest to determine that T/K hour obtains described ACTE required time, thereby determine in described 8 kinds of states, the position of temperature sensor is fixed on the ring flange of described accelerometer near on the described accelerometer surface of shell position, select thin tackifier to fix described temperature sensor, the lead-in wire position of the element of heating is the fast detecting path of measuring described ACTE from described accelerometer side lead-in wire.
This installs described temperature-measuring module and comprises a digital collection unit, be used for gathering according to certain sample frequency the temperature of the described accelerometer of described temperature sensor transmission, one intensification unit, be used for heating to design temperature for described accelerometer, one power supply unit, be used for being described accelerometer power supply, a digital multimeter links to each other with described power supply unit, is used for detecting the intensification cell voltage.
The present invention's beneficial effect compared with prior art:
1) select thinner thickness, its scope can make the more temperature of fast transport accelerometer of temperature sensor at the tackifier of 15 μ m～60 μ m; Temperature sensor is fixed on the ring flange of accelerometer in 1mm apart from the accelerometer surface of shell～5mm scope, the element of will heating is drawn from the accelerometer lateral location, sensor can the fast transport accelerometer temperature, thereby the Quick Measurement ACTE.
2) by setting up the single order identification model and utilizing Recursive Extended Least Squares Method that identification model is carried out parameter identification, by the comparison to 8 kinds of measuring state Measuring Time of accelerometer, can verify the path of fast detecting ACTE, thus the temperature of Quick Measurement accelerometer.
Description of drawings
Fig. 1 is ACTE pick-up unit synoptic diagram;
Fig. 2 is temperature sensor position view on accelerometer
Fig. 3 is temperature sensor adhesive thickness synoptic diagram;
Fig. 4 arranges synoptic diagram for the position of components of heating;
Fig. 5 is the temperature-measuring module pie graph;
Fig. 6 is T/K value and temperature survey response time relation curve;
Main reference numeral explanation:
1. temperature sensor 2. tackifier 3. component lead 4. accelerometer ring flanges of heating
5. accelerometer label location 6. element of heating
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are elaborated.In the following description, nonrestrictive purpose has been set forth detail for explanation, to help to understand all sidedly the present invention.Yet, it will be apparent to those skilled in the art that also and can in having broken away from other embodiment of these details, put into practice the present invention.
Need to prove at this, for fear of having blured the present invention because of unnecessary details, only show in the accompanying drawings with according to the closely-related device structure of the solution of the present invention and/or treatment step, and omitted other details little with relation of the present invention.
With reference to the accompanying drawings embodiments of the invention are described.
The invention provides the method in a kind of determination of acceleration meter temperature detection path, may further comprise the steps:
The first step, described ACTE measuring state is determined and temperature survey:
At first determine the impact factor of described ACTE measurement response time, comprise at least:
A. temperature sensor 1 is fixed on the position on the described accelerometer, and two kinds of situations are arranged as shown in Figure 2, is fixed on the ring flange 4 of described accelerometer the center or near described accelerometer surface of shell position.In the 1mm that described close described accelerometer surface of shell position is the described surface of shell of span～5mm scope, be that the center refers to that described temperature sensor center overlaps with described ring flange 4 centers of circle near the surface of shell position.
B. as shown in Figure 3, be used for tackifier 2 thickness of fixing described temperature sensor 1, it is thin or thick that two kinds of situations are arranged.Tackifier 2 thickness are in 15 μ m～60 mu m ranges the time, and tackifier 2 thinner thicknesses, tackifier 2 thickness are in 60 μ m～300 mu m ranges the time, and tackifier 2 thickness are thicker.
C. as shown in Figure 4, component lead 3 positions of heating, two kinds of situations are arranged, from described accelerometer front or side lead-in wire, as shown in Figure 5, the front of accelerometer refers to the surface of shell position that accelerometer ring flange 4 mark accelerometer label locations face for 5 times, and the side of accelerometer surface housing refers to the surface of shell beyond the accelerometer housing front.
Secondly, according to above-mentioned 3 kinds of factors, every kind of factor situation independent assortment obtains 8 kinds of ACTE measuring states.
Setting completed with above-mentioned state, successively every kind of state in described 8 kinds of states is carried out temperature acquisition according to certain sample frequency to temperature sensor 1, obtain the described ACTE of described temperature sensor 1 transmission, until described ACTE is warming up to design temperature, design temperature is 85 degree in the present embodiment, be higher than 85 when spending, stop to measure temperature.
Second step, data processing step:
At first, set up model, the single order identification model can represent the model of thermal control object, and because of in the present embodiment, accelerometer can be used as the thermal control object, thereby the ACTE variable quantity is controlled voltage variety relatively set up the single order identification model:
Wherein, K is scale-up factor, and T is inertia time constant, order
Ts is the sampling period, the single order identification model is carried out discretize obtain
Order:
Definition Model parameter vector and data vector:
Then, utilize Recursive Extended Least Squares Method (Recursive Extended Least Squares, RELS) that described model is carried out parameter identification,
RELS has good convergence as a kind of popularization of least square method, and this algorithm has expanded the dimension of parameter vector and data vector.If it is as follows to be used for the RELS algorithm of Model Distinguish, wherein,
Identified parameters for model:
Above-mentioned reckoning process can see " process identification " (Fang Chongzhi chief editor, publishing house of Tsing-Hua University) for details, repeats no more herein.
Bring the Temperature numerical of described every kind of state acquisition into formula (1) recursive identification and go out a and b, by separating quadratic equation with one unknown, can in the hope of K and T shown in the value (such as table 1) of described accelerometer under the different measuring state:
Table 1: the corresponding K of accelerometer different conditions, T value
In the 3rd step, estimate steps in decision-making:
Determine evaluation index, the relation curve of the response time that match T/K and described ACTE are measured, K gets 5, when T is 250,500,1000,1250,1500 o'clock, be input as 1, output reaches time of 98% of setting value, and as shown in Figure 6, hour to obtain described ACTE required time the shortest for T/K as can be known, thereby determine in described 8 kinds of states, the position of temperature sensor 1 is fixed on the ring flange 4 of described accelerometer near on the described accelerometer surface of shell position, is used for tackifier 2 thinner thicknesses of fixing described temperature sensor 1, and component lead 3 positions of heating are the fast detecting path of measuring described ACTE from described accelerometer side lead-in wire.
The invention provides the device in a kind of determination of acceleration meter temperature detection path, comprise that the ACTE measuring state is determined and temperature measurement unit, data processing unit and evaluation decision package:
Described temperature survey state is determined to comprise setting state module and temperature-measuring module with temperature measurement unit, described setting state module is used for measuring according to the described ACTE of impact the factor of response time and sets 8 kinds of ACTE measuring states, described temperature-measuring module is used for gathering successively described ACTE under described 8 kinds of states, temperature-measuring module synoptic diagram as shown in Figure 4, described temperature-measuring module comprises a digital collection unit, be used for gathering according to certain sample frequency the temperature of the described accelerometer of described temperature sensor 1 transmission, the frequency of selecting in the present embodiment is p.s. 1 time.It is the accelerometer power supply that power supply unit is used for, select in the present embodiment ± the 12V D.C. regulated power supply is that accelerometer is powered as power supply unit.The intensification unit is used for providing intensification voltage for accelerometer, can select D.C. regulated power supply as the intensification unit, described D.C. regulated power supply can be selected in 0～30V scope, select the 29V D.C. regulated power supply in the present embodiment, make ACTE progressively be elevated to design temperature by room temperature, design temperature is 85 degree in the present embodiment, is higher than 85 when spending, the 29V D.C. regulated power supply disconnects, and stops to heat up for described accelerometer.Described temperature-measuring module also comprises a digital multimeter, measures described intensification cell voltage.
Described data processing unit comprises model building module and identification of Model Parameters computing module, and described model building module is used for temperature is set up the single order identification model
Wherein K is scale-up factor, and T is inertia time constant, and described identification of Model Parameters computing module is used for utilizing Recursive Extended Least Squares Method to carry out identification to described first order modeling and draws K and the value of T under described 8 kinds of measuring states;
Described evaluation decision package is used for determining evaluation index, the relation curve of the response time that match T/K and described ACTE are measured, it is the shortest to determine that T/K hour obtains described ACTE required time, thereby determine in described 8 kinds of states, the position of temperature sensor 1 is fixed on the ring flange 4 of described accelerometer near on the described accelerometer surface of shell position, select the fixing described temperature sensors 1 of thin tackifier 2, component lead 3 positions of heating are the fast detecting path of measuring described ACTE from described accelerometer side lead-in wire.
The invention provides a kind of ACTE pick-up unit, as shown in Figure 1, comprise an accelerometer, accelerometer can be quartz flexible accelerometer.
One temperature sensor 1, sticking with glue agent 2 is fixed on described temperature sensor on the described accelerometer ring flange 4, tackifier 2 thickness should be thinner, thickness should be selected in 15 μ m～60 mu m ranges, the position of described temperature sensor 1 should be on described ring flange 4 in the 1mm of described accelerometer surface surface of shell～5mm scope, in order to obtain the temperature of described accelerometer;
One element 6 of heating, its lead-in wire draws to heat for described accelerometer from described accelerometer side, and the element 6 of heating can be selected the sheet of heating, and it is 150 ohm the sheet of heating that present embodiment is selected resistance.
One temperature-measuring module links to each other with described temperature sensor 1, gathers the temperature of the described accelerometer of described temperature sensor 1 output.Described temperature-measuring module comprises a digital collection unit as shown in Figure 4, is used for gathering according to certain sample frequency the temperature of the described accelerometer of described temperature sensor transmission, and the frequency of selecting in the present embodiment is p.s. 1 time.It is the accelerometer power supply that power supply unit is used for, select in the present embodiment ± the 12V D.C. regulated power supply is that accelerometer is powered as power supply unit.The intensification unit is used for providing intensification voltage for accelerometer, can select D.C. regulated power supply as the intensification unit, described D.C. regulated power supply can be selected in 0～30V scope, select the 29V D.C. regulated power supply in the present embodiment, make ACTE progressively be elevated to design temperature by room temperature, design temperature is 85 degree in the present embodiment, is higher than 85 when spending, this device stops to measure temperature, and described 29V D.C. regulated power supply stops to heat up for described accelerometer.Described temperature-measuring module also comprises a digital multimeter, links to each other with described intensification unit, detects the intensification cell voltage.
The invention provides the method that a kind of ACTE detects, it is characterized in that may further comprise the steps:
The tackifier 2 that temperature sensor 1 usefulness is thin is fixed on the position of close described accelerometer surface housing on the accelerometer ring flange 4, the element 6 of will heating sticks on the housing of described accelerometer surface, the described component lead 3 of heating is drawn from described accelerometer side, utilize temperature-measuring module to gather the temperature of described accelerometer.
The unspecified part of the present invention is technology as well known to those skilled in the art.
Claims (10)
1. the method that detects of an ACTE is characterized in that may further comprise the steps:
Temperature sensor is fixed on the position of close described accelerometer surface housing on the accelerometer ring flange with thin tackifier, to heat component affixing on the housing of described accelerometer surface, the lead-in wire of the described element of heating is drawn from described accelerometer side, utilize temperature-measuring module to gather the temperature of the described accelerometer of described temperature sensor transmission.
2. the method for ACTE detection according to claim 1 is characterized in that described temperature sensor is fixed on the described accelerometer with thin tackifier, and the tackifier thickness range is 15 μ m～60 μ m.
3. the method that detects of described ACTE according to claim 1 is characterized in that on the described ring flange that position near described accelerometer surface housing is the 1mm～5mm scope of the described surface of shell of span.
4. the method for ACTE detection according to claim 1 is characterized in that described side refers to corresponding accelerometer label location lower shell surface described accelerometer surface of shell in addition.
5. an ACTE pick-up unit comprises an accelerometer, it is characterized in that; Also comprise a temperature sensor, it is fixed on the described accelerometer ring flange near on the shell position of described accelerometer surface, in order to obtain the temperature of described accelerometer with thin tackifier; One element of heating, its lead-in wire draws to heat for described accelerometer from described accelerometer side; One temperature-measuring module links to each other with described temperature sensor, gathers the temperature of the described accelerometer of described temperature sensor output.
6. ACTE pick-up unit according to claim 5, it is characterized in that described temperature-measuring module comprises that a digital collection unit is used for gathering the described ACTE of described temperature sensor output, one power supply unit is used for being described accelerometer power supply, one intensification unit links to each other with the described element of heating, and is used for providing intensification voltage for accelerometer.
7. ACTE pick-up unit according to claim 6 is characterized in that described intensification unit can be D.C. regulated power supply, and available voltage range is 0～30V.
8. the method in a determination of acceleration meter temperature fast detecting path is characterized in that may further comprise the steps:
The first step, the ACTE measuring state is determined and temperature survey:
1) determines the impact factor of described ACTE measurement response time: the position that comprises at least a. temperature sensor, be fixed on center on the ring flange of described accelerometer or be used for the tackifier thickness of fixing described temperature sensor near described accelerometer surface of shell position b., the heat lead-in wire position of element of thin or thick c. is from described accelerometer front or the side lead-in wire;
2) obtain 8 kinds of ACTE measuring states according to above-mentioned 3 kinds of factor independent assortments;
3) successively every kind of state in described 8 kinds of states is carried out temperature acquisition to described accelerometer according to certain sample frequency and be warming up to design temperature;
Second step, data processing step:
Set up the single order identification model
Wherein, K is scale-up factor, T is inertia time constant, Δ U is the voltage on the element of heating, Δ T is the sampling period, utilize Recursive Extended Least Squares Method to carry out identification of Model Parameters to described single order identification model, the temperature value of described every kind of state acquisition is carried out Model Distinguish, draw K and the T value under described accelerometer different measuring state;
In the 3rd step, estimate steps in decision-making:
Determine evaluation index, the relation curve of the response time that match T/K and described ACTE are measured, it is the shortest to determine that T/K hour obtains described ACTE required time, thereby determine in described 8 kinds of states, the position of temperature sensor is fixed on the ring flange of described accelerometer near on the described accelerometer surface of shell position, the tackifier thin thickness that is used for fixing described temperature sensor, the lead-in wire position of the element of heating are the fast detecting path of measuring described ACTE from described accelerometer side lead-in wire.
9. the device in a determination of acceleration meter temperature detection path is characterized in that comprising that the temperature survey state determines and temperature measurement unit, data processing unit and evaluation decision package:
Described temperature survey state is determined to comprise setting state module and temperature-measuring module with temperature measurement unit, described setting state module is used for measuring according to the described ACTE of impact the factor of response time and sets 8 kinds of ACTE measuring states, and described temperature-measuring module is used for gathering successively described ACTE under described 8 kinds of states;
Described data processing unit comprises model building module and identification of Model Parameters computing module, and described model building module is used for temperature is set up the single order identification model
Wherein K is scale-up factor, T is inertia time constant, Δ U is the voltage on the element of heating, and Δ T is the sampling period, and described identification of Model Parameters computing module is used for utilizing Recursive Extended Least Squares Method to carry out identification to described first order modeling and draws K and the value of T under described 8 kinds of measuring states;
Described evaluation decision package is used for determining evaluation index, the relation curve of the response time that match T/K and described ACTE are measured, it is the shortest to determine that T/K hour obtains described ACTE required time, thereby determine in described 8 kinds of states, the position of temperature sensor is fixed on the ring flange of described accelerometer near on the described accelerometer surface of shell position, select thin tackifier to fix described temperature sensor, the lead-in wire position of the element of heating is the fast detecting path of measuring described ACTE from described accelerometer side lead-in wire.
10. the device in determination of acceleration meter temperature detection according to claim 9 path, it is characterized in that described temperature-measuring module comprises a digital collection unit, be used for gathering according to certain sample frequency the temperature of the described accelerometer of described temperature sensor transmission, one intensification unit, be used for heating to design temperature for described accelerometer, a power supply unit is used for being described accelerometer power supply, one digital multimeter links to each other with described power supply unit, is used for detecting the intensification cell voltage.
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