A method and apparatus for low-power control of fiber optic gyroscope light source

Abstract

This invention relates to a low-power control method and device for a fiber optic gyroscope light source, belonging to the field of fiber optic gyroscope control technology. It solves the problem of high power consumption in existing light source temperature control devices that use a constant preset temperature and have high power consumption during temperature control circuit adjustment. The method involves: determining the operating temperature range and set temperature range of the fiber optic gyroscope based on its usage requirements; measuring the ambient temperature of the fiber optic gyroscope and setting the preset temperature for the light source temperature control based on this ambient temperature, allowing the preset temperature to fluctuate within the set temperature range according to the ambient temperature; measuring the temperature of the light source chip and comparing the preset temperature to obtain the temperature difference between them; and implementing temperature control on the light source chip based on this temperature difference. This invention reduces the power consumption of the temperature control circuit when the fiber optic gyroscope operates at low and high temperatures.

Description

Technical Field

[0001] This invention relates to the field of fiber optic gyroscope control technology, and in particular to a low-power control method and device for fiber optic gyroscope light sources. Background Technology

[0002] Fiber optic gyroscopes are optical angular rate sensors based on the SAGNAC effect. With their all-solid-state characteristics, strong environmental adaptability, and wide accuracy range, they have been widely used in navigation, guidance, and control fields across land, sea, air, and space.

[0003] Fiber optic gyroscopes typically employ temperature-controlled light sources to ensure stable beam performance within the optical path system. The control circuit controls the light source's temperature by transferring heat from one end of the thermoelectric cooler to the other, thus maintaining the light source's filament temperature at a preset temperature. Therefore, the magnitude of the temperature control current depends on the temperature difference between the two ends of the thermoelectric cooler (i.e., the difference between the ambient temperature and the preset temperature). In engineering applications, the preset temperature for the light source is commonly set to a constant 25°C. When the ambient temperature of the fiber optic gyroscope is high or low, the temperature control circuit consumes significant power.

[0004] To reduce the power consumption of temperature control in fiber optic gyroscope light sources, the main measures adopted in engineering applications are as follows: First, the light source design is structurally optimized by using sealed packaging to reduce direct heat exchange between the light source die and the outside world; second, the thermoelectric cooler is improved to increase temperature control efficiency; and finally, the temperature control circuit is improved by using a pulse width modulation scheme to reduce power consumption.

[0005] Even after applying the above measures, the power consumption of the light source temperature control remains the main part of the power consumption of fiber optic gyroscope products when they are working in high-temperature and low-temperature application environments. Therefore, adopting a specific control device to achieve low-power temperature control is of great significance in engineering. Summary of the Invention

[0006] Based on the above analysis, the present invention aims to provide a low-power control device and method for fiber optic gyroscope light sources, solving the problem that existing fiber optic gyroscope light source temperature control devices use a constant preset temperature for light source temperature control and have high power consumption during temperature control circuit adjustment. Based on the optimization of the light source structure, improvement of the thermoelectric cooler and temperature control circuit in the existing technology, the power consumption of the temperature control circuit of the fiber optic gyroscope is further reduced when it operates at low and high temperatures.

[0007] The objective of this invention is mainly achieved through the following technical solutions:

[0008] On one hand, the present invention provides a low-power control method for a fiber optic gyroscope light source, comprising:

[0009] Based on the usage requirements of the fiber optic gyroscope, determine the operating temperature range and set temperature range of the fiber optic gyroscope;

[0010] Measure the operating ambient temperature of the fiber optic gyroscope, and set the preset temperature of the light source temperature control according to the operating ambient temperature, so that the preset temperature of the light source temperature control fluctuates within the set temperature range according to the operating ambient temperature of the fiber optic gyroscope.

[0011] Measure the temperature of the light source chip, compare the preset temperature of the light source temperature control with the temperature of the light source chip, and obtain the temperature difference between the preset temperature of the light source temperature control and the temperature of the light source chip.

[0012] Temperature control of the light source chip is implemented based on the temperature difference between the preset temperature of the light source and the temperature of the light source chip.

[0013] Furthermore, the operating temperature range of the fiber optic gyroscope [T] L T H The set temperature range is [T]. b T t The step of setting the preset temperature for the light source temperature control based on the ambient temperature includes: when the ambient temperature of the fiber optic gyroscope is within the operating temperature range of the fiber optic gyroscope [T]... L T H When the light source temperature control preset temperature T is within the specified range, S It is determined by the following formula:

[0014] T L ≤T E ≤T H hour,

[0015] Among them, T S The preset temperature for the light source temperature control is ℃;

[0016] T b To set the lower value of the temperature range, ℃;

[0017] T t To set the high value of the temperature range, ℃;

[0018] T E The operating ambient temperature of the fiber optic gyroscope is ℃;

[0019] T H The operating temperature is ℃;

[0020] T L The operating temperature is ℃.

[0021] Furthermore, the step of setting the preset temperature for the light source temperature control based on the ambient temperature also includes setting the preset temperature when the ambient temperature T of the fiber optic gyroscope is... E Higher than the high temperature operating temperature T H At that time, the preset temperature T of the light source temperature control S It is determined by the following formula: T E >T HAt that time, T S =T t .

[0022] Furthermore, the step of setting the preset temperature for the light source temperature control based on the ambient temperature also includes setting the preset temperature when the ambient temperature T of the fiber optic gyroscope is... E Below the low temperature operating temperature T L At that time, the preset temperature T of the light source temperature control S It is determined by the following formula: T E <T L At that time, T S =Tb.

[0023] Furthermore, the step of controlling the temperature of the light source chip based on the temperature difference between the preset temperature of the light source and the temperature of the light source chip includes:

[0024] The temperature difference ΔT between the preset temperature of the light source and the temperature of the light source chip is input into the temperature controller. Based on this temperature difference, the temperature controller calculates the temperature control parameters using a PID algorithm and implements temperature control on the light source chip: if ΔT > 0, the light source chip is heated to increase its temperature; if ΔT < 0, the light source chip is cooled to decrease its temperature until it equals the preset temperature of the light source.

[0025] The present invention also provides a low-power control device for a fiber optic gyroscope light source, used to implement the low-power control method for a fiber optic gyroscope light source according to any one of claims 1-5, comprising a temperature controller, a light source, a temperature preset circuit, a comparator, a thermoelectric cooler for the light source, a thermistor for the light source, and a light source chip;

[0026] The temperature controller, temperature preset circuit, and light source thermistor are connected to the comparator, the light source thermoelectric cooler is connected to the temperature controller, and the light source chip, light source thermoelectric cooler, and light source thermistor are built into the light source.

[0027] Furthermore, the temperature preset circuit can measure the ambient temperature and set the preset temperature for the light source temperature control according to the ambient temperature.

[0028] The light source thermistor measures the temperature of the light source chip. The temperature preset circuit and the light source thermistor respectively output the light source temperature control preset temperature and the light source chip temperature to the comparator to obtain the temperature difference between the light source temperature control preset temperature and the light source chip temperature.

[0029] The temperature controller receives the temperature difference between the preset temperature of the light source output by the comparator and the temperature of the light source chip, calculates the temperature control parameters through a PID algorithm, and inputs them into the light source thermoelectric cooler.

[0030] The thermoelectric cooler of the light source receives temperature control parameters, controls the direction of current, heats or cools the light source chip, and adjusts the temperature of the light source chip to the preset temperature of the light source temperature control.

[0031] Furthermore, the temperature preset circuit consists of a temperature sensor, a digital signal processor, and a digital-to-analog converter;

[0032] A temperature sensor measures the ambient temperature of the fiber optic gyroscope, a digital signal processor sets the preset temperature for the light source temperature control based on the measured ambient temperature, and a digital-to-analog converter outputs the preset temperature for the light source temperature control.

[0033] Furthermore, the set temperature range is [15℃, 40℃].

[0034] The present invention also provides a temperature-controlled light source for a gyroscope manufactured according to the above control method.

[0035] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0036] 1. The control device of the present invention employs a temperature preset circuit, which can measure the working environment temperature of the fiber optic gyroscope and set the preset temperature of the light source temperature control according to the working environment temperature.

[0037] 2. The output of the temperature preset circuit and the output of the light source thermistor can be compared by a comparator to output a feedback control signal, thereby realizing temperature control.

[0038] 3. The method of the present invention sets the preset temperature of the light source temperature control according to the working environment temperature of the fiber optic gyroscope, so that the preset temperature of the light source temperature control fluctuates within a set range according to the ambient temperature when the fiber optic gyroscope is working in the application environment, thereby reducing the temperature difference adjusted by the temperature control circuit and reducing the power consumption of the fiber optic gyroscope light source.

[0039] 4. The method of the present invention sets the preset temperature of the light source temperature control according to the working environment temperature of the fiber optic gyroscope, which can enable the fiber optic gyroscope product to work stably at higher temperatures and expand the working temperature range of the fiber optic gyroscope product.

[0040] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0041] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0042] Figure 1 This is a temperature setting diagram for the temperature control preset temperature of the method of the present invention;

[0043] Figure 2 This is a diagram of the device of the present invention.

[0044] Figure label:

[0045] 1-Temperature controller; 2-Light source; 3-Temperature preset circuit; 4-Comparator; 5-Light source thermoelectric cooler (TEC); 6-Light source thermistor; 7-Light source chip; 8-Temperature sensor; 9-Digital signal processor; 10-Digital-to-analog converter. Detailed Implementation

[0046] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0047] This invention provides a low-power control method for a fiber optic gyroscope light source, comprising the following steps:

[0048] Based on the usage requirements of the fiber optic gyroscope, determine the operating temperature range and set temperature range of the fiber optic gyroscope;

[0049] Measure the operating ambient temperature of the fiber optic gyroscope, and set the preset temperature of the light source temperature control according to the operating ambient temperature, so that the preset temperature of the light source temperature control fluctuates within the set temperature range according to the operating ambient temperature of the fiber optic gyroscope.

[0050] Measure the temperature of the light source chip, compare the preset temperature of the light source temperature control with the temperature of the light source chip, and obtain the temperature difference between the preset temperature of the light source temperature control and the temperature of the light source chip.

[0051] Temperature control of the light source chip is implemented based on the temperature difference between the preset temperature of the light source and the temperature of the light source chip.

[0052] Existing technologies mainly reduce the power consumption of temperature-controlled light sources by improving the structure of the light source, the thermoelectric cooler, and the temperature control circuit. However, in actual use, the temperature-controlled light source still uses a constant preset temperature. The control method of this invention adopts a variable preset temperature for the light source. The preset temperature for the light source is set according to the operating environment temperature of the fiber optic gyroscope. When the fiber optic gyroscope is working in the application environment, the preset temperature for the light source fluctuates within a set range according to the ambient temperature. The absolute value of the temperature difference between the preset temperature for the light source and the operating environment temperature is reduced, and the temperature difference that the temperature control circuit needs to adjust is reduced. This can reduce the power consumption of the temperature control circuit when the fiber optic gyroscope is working at low and high temperatures.

[0053] Specifically, the operating temperature range of fiber optic gyroscopes [T] L TH [T] represents the normal operating temperature range of the fiber optic gyroscope, determined by the ambient temperature range of its application environment. In engineering projects, a certain design margin is typically allowed. For example, if the ambient temperature range of the fiber optic gyroscope's application environment is -50℃ to 80℃, then in actual design, the operating temperature range of the fiber optic gyroscope [T] is... L T H [Can be [-55℃, 85℃]].

[0054] Set temperature range [T] b T t [T] represents the temperature range within which the light source chip can operate stably. For example, a temperature range [T] is set. b T t The preset temperature range for the light source temperature control is [15℃, 40℃]. Any temperature point within this range allows the fiber optic gyroscope's light source chip to operate stably. When the ambient temperature of the fiber optic gyroscope exceeds this temperature range, the method of this invention sets the preset temperature T of the light source temperature control. S Always within the set temperature range [T b T t Within this range, the stable operation of the fiber optic gyroscope light source chip is ensured.

[0055] Specifically, the operating ambient temperature of the fiber optic gyroscope is measured, and a preset temperature for the light source temperature control is set based on this ambient temperature. This preset temperature fluctuates within a set temperature range according to the operating ambient temperature of the fiber optic gyroscope, including:

[0056] Measuring the ambient temperature T of the fiber optic gyroscope E ;

[0057] The preset temperature T of the light source temperature control is set according to the measured ambient temperature. S Light source temperature control preset temperature T S Set it according to the following formula:

[0058] Formula 1:

[0059] Formula 2: T S =T b T E <T L ;

[0060] Formula 3: T S =T t T E >T H ;

[0061] Among them, T S The preset temperature for the light source temperature control is ℃;

[0062] T bTo set the lower value of the temperature range, ℃;

[0063] T t To set the high value of the temperature range, ℃;

[0064] T E The operating ambient temperature of the fiber optic gyroscope is ℃;

[0065] T H The operating temperature is ℃;

[0066] T L The operating temperature is ℃.

[0067] It should be noted that the set temperature range is [T b T t ]; Fiber optic gyroscope operating environment temperature T E Higher than the high temperature operating temperature T H At that time, set the preset temperature T of the light source temperature control. S Set to set temperature range [T] b T t The high value T in ] t ;

[0068] Fiber optic gyroscope operating environment temperature T E Below the low temperature operating temperature T L At that time, set the preset temperature T of the light source temperature control. S Set to set temperature range [T] b T t The low value T in ] b ;

[0069] Fiber optic gyroscope operating environment temperature T E Located in the interval [T L T H When the light source temperature is preset to T, S Set within the set temperature range [T] b T t Within ], and determined according to Formula 1.

[0070] Simultaneously, the temperature of the light source chip is measured, and the preset temperature of the light source temperature control is compared with the temperature of the light source chip to obtain the temperature difference between the preset temperature of the light source temperature control and the temperature of the light source chip. This temperature difference is input into the temperature controller, which calculates the temperature control parameters through a PID algorithm and adjusts the temperature of the light source chip according to the temperature control parameters.

[0071] It should be noted that when a fiber optic gyroscope first starts operating in its application environment, the temperature of the light source chip is equal to the ambient temperature. The temperature of the light source chip is measured, and the preset temperature of the light source temperature controller is compared with the light source chip temperature to obtain the temperature difference ΔT. This temperature difference is also the temperature difference between the preset temperature of the light source temperature controller and the ambient temperature of the fiber optic gyroscope. This temperature difference is input into the temperature controller, which calculates the temperature control parameters using a PID algorithm and adjusts the light source chip temperature accordingly. For temperature-controlled light sources, to ensure stable beam performance during fiber optic gyroscope operation, the light source chip temperature must always be maintained at the preset temperature. Therefore, when the light source chip temperature is not equal to the preset temperature, it is necessary to control the thermoelectric cooler (TEC) of the light source chip to heat or cool it to adjust the light source chip temperature to be equal to the preset temperature. If ΔT > 0, the light source chip is heated to increase its temperature; if ΔT < 0, the light source chip is cooled to decrease its temperature. The smaller the absolute difference of ΔT, the less power is required to adjust and maintain the light source chip temperature to the preset temperature of the light source temperature control.

[0072] Preferably, select setting T b =25℃, T t >25℃, forming a set temperature range [25℃, T t Compared to the constant temperature control method, which sets the preset temperature of the light source to a constant 25℃, when the fiber optic gyroscope operates in a high-temperature environment, the operating ambient temperature T of the fiber optic gyroscope... E Equal to or higher than the high-temperature operating temperature T H At that time, the preset temperature T of the light source temperature control of the present invention S =T t Light source temperature control preset temperature T S and the operating temperature T of fiber optic gyroscope E The absolute value of the temperature difference is less than the preset temperature of the light source temperature control (25℃) and the operating ambient temperature T of the fiber optic gyroscope in the constant temperature control method. E The absolute value of the temperature difference means that the temperature difference that needs to be adjusted is small during the process of controlling the temperature of the light source chip to be equal to the preset temperature of the light source temperature control. A smaller temperature difference can reduce the power consumption of the product when it is operating at high temperatures.

[0073] Select setting T b =T t >25℃, compared to the constant temperature control method that sets the preset temperature of the light source to a constant 25℃, when the fiber optic gyroscope operates in a high-temperature environment, the operating ambient temperature T of the fiber optic gyroscope is... E Equal to or higher than the high-temperature operating temperature T H At that time, the preset temperature T of the light source temperature control of the present invention S =T t Light source temperature control preset temperature T Sand the operating temperature T of fiber optic gyroscope E The absolute value of the temperature difference is less than the preset temperature of the light source temperature control (25℃) and the operating ambient temperature T of the fiber optic gyroscope in the constant temperature control method. E The absolute value of the temperature difference means that the temperature difference that needs to be adjusted is small during the process of controlling the temperature of the light source chip to be equal to the preset temperature of the light source temperature control. A smaller temperature difference can reduce the power consumption of the product when it is operating at high temperatures.

[0074] Select setting T t =25℃, T b <25℃, forming a set temperature range [T] b [25℃], compared to the constant temperature control method which sets the preset temperature of the light source to a constant 25℃, when the fiber optic gyroscope operates in a low-temperature environment, the operating ambient temperature T of the fiber optic gyroscope is... E Equal to or below the low-temperature operating temperature T L At that time, the preset temperature T of the light source temperature control of the present invention S =T b Light source temperature control preset temperature T S and the operating temperature T of fiber optic gyroscope E The absolute value of the temperature difference is less than the preset temperature of the light source temperature control (25℃) and the operating ambient temperature T of the fiber optic gyroscope in the constant temperature control method. E The absolute value of the temperature difference, that is, the smaller the temperature difference that needs to be adjusted in the process of controlling the temperature of the light source chip to be equal to the preset temperature of the light source temperature control, the lower the power consumption of the product when operating at low temperature.

[0075] Select setting T b =T t <25℃, compared to the constant temperature control method which sets the preset temperature of the light source to a constant 25℃, when the fiber optic gyroscope operates in a low-temperature environment, the operating ambient temperature T of the fiber optic gyroscope is... E Equal to or below the low-temperature operating temperature T L At that time, the preset temperature T of the light source temperature control of the present invention S =T b Light source temperature control preset temperature T S and the operating temperature T of fiber optic gyroscope E The absolute value of the temperature difference is less than the preset temperature of the light source temperature control (25℃) and the operating ambient temperature T of the fiber optic gyroscope in the constant temperature control method. E The absolute value of the temperature difference, that is, the smaller the temperature difference that needs to be adjusted in the process of controlling the temperature of the light source chip to be equal to the preset temperature of the light source temperature control, the lower the power consumption of the product when operating at low temperature.

[0076] Select setting T t >25℃, T b<25℃, compared to the constant temperature control method which sets the preset temperature of the light source to a constant 25℃, when the fiber optic gyroscope operates in a high-temperature environment, the operating ambient temperature T of the fiber optic gyroscope is... E Equal to or higher than the high-temperature operating temperature T H At that time, the preset temperature T of the light source temperature control of the present invention S =T t Light source temperature control preset temperature T S and the operating temperature T of fiber optic gyroscope E The absolute value of the temperature difference is less than the preset temperature of the light source temperature control (25℃) and the operating ambient temperature T of the fiber optic gyroscope in the constant temperature control method. E The absolute value of the temperature difference; a smaller temperature difference can reduce the power consumption of the product during high-temperature operation. When the fiber optic gyroscope operates in a low-temperature environment, the operating ambient temperature T of the fiber optic gyroscope is... E Equal to or below the low-temperature operating temperature T L At that time, the preset temperature T of the light source temperature control of the present invention S =T b The preset temperature T of the light source temperature control in this invention S and the operating temperature T of fiber optic gyroscope E The absolute value of the temperature difference is less than the preset temperature of the light source temperature control (25℃) and the operating ambient temperature T of the fiber optic gyroscope in the constant temperature control method. E The absolute value of the temperature difference means that the temperature difference that needs to be adjusted is small during the process of controlling the temperature of the light source chip to be equal to the preset temperature of the light source temperature control. A smaller temperature difference can reduce the power consumption of the product when it is operating at high temperatures.

[0077] The present invention also provides a low-power control device for a fiber optic gyroscope light source, used to implement the above-mentioned low-power control method for a fiber optic gyroscope light source, including a temperature controller, a light source, a temperature preset circuit, a comparator, a thermoelectric cooler for the light source, a thermistor for the light source, and a light source chip.

[0078] The temperature controller, temperature preset circuit, and light source thermistor are connected to the comparator, the light source thermoelectric cooler is connected to the temperature controller, and the light source chip, light source thermoelectric cooler, and light source thermistor are built into the light source.

[0079] The temperature preset circuit consists of a temperature sensor, a digital signal processor, and a digital-to-analog converter. The temperature sensor measures the ambient temperature of the fiber optic gyroscope, the digital signal processor sets the preset temperature of the light source based on the measured ambient temperature, and the preset temperature of the light source is output through the digital-to-analog converter.

[0080] The light source thermistor measures the temperature of the light source chip. The temperature preset circuit and the light source thermistor output the temperature control preset temperature and the light source chip temperature to the comparator respectively to obtain the temperature difference between the temperature control preset temperature and the light source chip temperature.

[0081] The temperature controller receives the temperature difference between the preset temperature output by the comparator and the temperature of the light source chip, calculates the temperature control parameters through the PID algorithm, and inputs them into the light source thermoelectric cooler.

[0082] The thermoelectric cooler for the light source receives temperature control parameters, controls the direction of current, heats or cools the light source chip, and adjusts the temperature of the light source chip to the preset temperature.

[0083] The fiber optic gyroscope temperature-controlled light source prepared according to the control method and device of the present invention sets the preset temperature of the light source according to the working environment temperature of the fiber optic gyroscope. When the fiber optic gyroscope is working in the application environment, the preset temperature of the light source fluctuates within a set range according to the ambient temperature, thereby reducing the temperature difference adjusted by the temperature control circuit and reducing the power consumption of the temperature-controlled light source.

[0084] Example

[0085] The operating temperature range of a certain type of fiber optic gyroscope product [T] L T H The temperature is set at [-55℃, 85℃]. The constant temperature control method sets the preset temperature T of the light source temperature control. S The set temperature range of this invention is 25°C [T]. b T t The temperature difference (characterized by temperature control current) required for temperature control in the application environment is [15℃, 35℃]. Table 1 shows that the method of this invention requires a smaller temperature difference for temperature control and consumes less power. Compared to existing methods, this further reduces the power consumption of the temperature control system needed to ensure the light source operates normally within the set temperature range when the fiber optic gyroscope is working at low and high temperatures.

[0086] When T E =90℃, i.e., T E >T H The initial temperature of the light source die is equal to T. E According to Formula 3, in the control method of the present invention, the preset temperature T of the light source temperature control S =35℃, cooling temperature difference is |T E -T S |, i.e., T E -T S The absolute value is 55℃; similarly, in the constant temperature control method, the preset temperature T for the light source temperature control is... S =25℃, with a cooling temperature difference of 65℃.

[0087] When T E =85℃, i.e., T E =T H The initial temperature of the light source die is equal to T. E According to Formula 1, in the control method of the present invention, the preset temperature T of the light source temperature control S =35℃, cooling temperature difference is |TE -T S |, i.e., T E -T S The absolute value is 50℃; similarly, in the constant temperature control method, the preset temperature T for the light source temperature control is... S =25℃, cooling temperature difference is 60℃.

[0088] When T E =60℃, i.e., T L <T E <T H The initial temperature of the light source die is equal to T. E According to Formula 1, in the control method of the present invention, the preset temperature T of the light source temperature control S =31.4℃, cooling temperature difference is T E -T S |, which is 28.6℃; similarly, in the constant temperature control method, the preset temperature T of the light source temperature control S =25℃, cooling temperature difference is 35℃.

[0089] When T E =10℃, i.e., T L <T E <T H The initial temperature of the light source die is equal to T. E According to Formula 1, in the control method of the present invention, the preset temperature T of the light source temperature control S =24.3℃, heating temperature difference is T E -T S |, which is 14.3℃; similarly, in the constant temperature control method, the preset temperature T for the light source temperature control S =25℃, with a heating temperature difference of 15℃.

[0090] When T E = -20℃, i.e., T L <T E <T H The initial temperature of the light source die is equal to T. E According to Formula 1, in the control method of the present invention, the preset temperature T of the light source temperature control S =20℃, heating temperature difference is |T E -T S |, which is 40℃; similarly, in the constant temperature control method, the preset temperature T of the light source temperature control. S =25℃, heating temperature difference is 45℃.

[0091] When T E = -55℃, i.e., T L =T E The initial temperature of the light source die is equal to T. EAccording to Formula 1, in the control method of the present invention, the preset temperature T of the light source temperature control S =15℃, heating temperature difference is |T E -T S |, which is 70℃; similarly, in the constant temperature control method, the preset temperature T of the light source temperature control. S =25℃, heating temperature difference is 80℃.

[0092] When T E = -60℃, i.e., T E <T L The initial temperature of the light source die is equal to T. E According to Formula 2, in the control method of the present invention, the preset temperature T of the light source temperature control S =15℃, heating temperature difference is |T E -T S |, which is 75℃; similarly, in the constant temperature control method, the preset temperature T of the light source temperature control. S =25℃, heating temperature difference is 85℃.

[0093] Table 1 Comparison of temperature differences requiring temperature control between the method of this invention and conventional methods

[0094]

[0095]

[0096] As can be seen from Table 1, in the method of the present invention, the preset temperature T of the light source temperature control is... S and the operating temperature T of fiber optic gyroscope E The absolute value of the temperature difference is less than the preset temperature of the light source temperature control (25℃) and the operating ambient temperature T of the fiber optic gyroscope in the constant temperature control method. E The absolute value of the temperature difference means that the temperature difference that needs to be adjusted is small during the process of controlling the temperature of the light source chip to be equal to the preset temperature of the light source temperature control. A smaller temperature difference can reduce the power consumption of the product when it is operating at high temperatures.

[0097] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A low power consumption control method for a fiber-optic gyroscope light source, characterized in that, The method comprises the following steps: According to the use requirements of the fiber-optic gyroscope, the working temperature range and the set temperature range of the fiber-optic gyroscope are determined; The working environment temperature of the fiber-optic gyroscope is measured, and the light source temperature control preset temperature is set according to the working environment temperature, so that the light source temperature control preset temperature floats within the set temperature range according to the working environment temperature of the fiber-optic gyroscope; The light source die temperature is measured, and the light source temperature control preset temperature and the light source die temperature are compared to obtain the temperature difference between the light source temperature control preset temperature and the light source die temperature; According to the temperature difference between the light source temperature control preset temperature and the light source die temperature, the temperature control of the light source die is implemented; The working temperature range [T L , T H ] of the fiber-optic gyroscope, the set temperature range is [T b , T t ], the light source temperature control preset temperature according to the working environment temperature is set, comprising: when the fiber-optic gyroscope working environment temperature is located in the working temperature range [T L , T H ] of the fiber-optic gyroscope, the light source temperature control preset temperature T S is determined by the following formula: T L ≤T E ≤T H time, When the operating ambient temperature of the fiber optic gyroscope is T E Higher than the high temperature operating temperature T H At that time, the preset temperature T of the light source temperature control S It is determined by the following formula: T E >T H At that time, T S =T t ; When the working environment temperature T of the fiber-optic gyroscope is lower than the low-temperature working temperature T E , the temperature control preset temperature T of the light source is T L . S The temperature control preset temperature T of the light source is determined by the following formula: T E <T L , T S =Tb. Wherein, T S is the light source temperature control preset temperature, ℃; T b To set the temperature interval low value, °C; T t To set the high value of the temperature interval, °C; T E T is the operating temperature of the fiber-optic gyroscope, °C; T H T is the high temperature operating temperature, °C; T L T is the low temperature operating temperature, °C.

2. The control method according to claim 1, characterized by, The temperature difference between the light source temperature control preset temperature and the light source die temperature is input into the temperature controller, and the temperature controller calculates the temperature control parameter through the PID algorithm according to the temperature difference to implement the temperature control of the light source die: if ΔT>0, the light source die is heated to increase the light source die temperature; if ΔT<0, the light source die is cooled to reduce the light source die temperature, until the light source die temperature is equal to the light source temperature control preset temperature. The set temperature range is [15℃, 40℃].

3. The control method according to claim 1, characterized by, 4. The light source gyroscope temperature control light source manufactured by the control method of claim 1. It comprises a temperature controller, a light source, a temperature preset circuit, a comparator, a light source thermoelectric cooler, a light source thermistor and a light source die; 5. A low power consumption control device for fiber-optic gyroscope light source, used to implement the low power consumption control method for fiber-optic gyroscope light source according to any one of claims 1-3, characterized in that, The temperature controller, the temperature preset circuit and the light source thermistor are respectively connected with the comparator, the light source thermoelectric cooler is connected with the temperature controller, and the light source die, the light source thermoelectric cooler and the light source thermistor are built-in in the light source. The temperature preset circuit can measure the environment temperature and set the light source temperature control preset temperature according to the environment temperature; 6. The control device of claim 5, wherein The light source thermistor measures the light source die temperature, and the temperature preset circuit and the light source thermistor respectively output the light source temperature control preset temperature and the light source die temperature to the comparator to obtain the temperature difference between the light source temperature control preset temperature and the light source die temperature; The temperature controller receives the temperature difference between the light source temperature control preset temperature and the light source die temperature output by the comparator, calculates the temperature control parameter through the PID algorithm, and inputs the light source thermoelectric cooler; The light source thermoelectric cooler receives the temperature control parameter, controls the current direction, heats or cools the light source die, and adjusts the light source die temperature to the light source temperature control preset temperature. The temperature preset circuit is composed of a temperature sensor, a digital signal processor and a digital-to-analog converter; 7. The control device of claim 6, wherein The temperature sensor measures the working environment temperature of the fiber-optic gyroscope, the digital signal processor sets the light source temperature control preset temperature according to the measured working environment temperature, and the digital-to-analog converter outputs the light source temperature control preset temperature. ​

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