Super-radiation light-emitting diode light source driving circuit

Abstract

The utility model discloses a super-radiation light-emitting diode light source driving circuit, and relates to the technical field of inertial navigation optical fiber gyroscope light source driving. The positive control end and the negative control end of the TEC temperature control module are respectively connected with the cold end and the hot end of the super-radiation light-emitting diode light source and are used for controlling the temperature of the super-radiation light-emitting diode light source to be within a set range, and the constant power module mainly provides stable and constant driving current for the super-radiation light-emitting diode light source; according to the utility model, stable and constant driving current can be provided for the super-radiation light-emitting diode light source, the super-radiation light-emitting diode light source TEC module can be controlled to carry out temperature compensation, and the optical power change caused by temperature change is reduced, so that the precision index of the optical fiber gyroscope is improved, the circuit structure is simple, the miniaturization design can be realized, and the cost is low. And the size and the weight of the optical fiber gyroscope are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to inertial navigation optical fiber gyroscope light source drive technical field, specifically relates to a kind of super radiant light-emitting diode light source drive circuit. BACKGROUND

[0002] Optical fiber gyroscope is a kind of sensitive element based on optical fiber coil, utilizes the light emitted by laser diode to propagate in two directions in optical fiber, and the phase difference of two light paths or the change of interference fringe is detected to measure angular velocity.Compared with traditional mechanical gyroscope, optical fiber gyroscope has the advantages of all-solid-state, no rotating parts, long service life, large dynamic range, simple structure and the like.The application field of optical fiber gyroscope is very wide, including aerospace, national defense and military, intelligent transportation, oil exploration, railway track measurement, ocean engineering and the like.In the field of aerospace, optical fiber gyroscope is used for navigation, attitude control and stabilization system of aircraft, to ensure the safety of aircraft.In addition, optical fiber gyroscope is also applied to unmanned carrier (such as robot and unmanned aerial vehicle) and other autonomous intelligent systems.

[0003] The importance of light source drive technology in optical fiber gyroscope lies in that it directly affects the performance and precision of optical fiber gyroscope.The change of light source spectrum will cause scale factor error and output noise error of optical fiber gyroscope, and then affect its measurement precision.Therefore, the selection and optimization of high-efficiency light source, the development of automated manufacturing process and the modular design and integration technology are the key technologies to improve the performance of optical fiber gyroscope. UTILITY MODEL CONTENT

[0004] To solve the problems mentioned in the above background art, the purpose of the utility model is to provide a kind of super radiant light-emitting diode light source drive circuit.

[0005] The super radiant light-emitting diode light source drive circuit of the utility model, including TEC temperature control module, constant power control module, the positive and negative control ends of TEC temperature control module are connected with the cold end and hot end of super radiant light-emitting diode light source respectively, for controlling the temperature of super radiant light-emitting diode light source in set range, and constant power module mainly provides stable constant drive current for super radiant light-emitting diode light source.

[0006] As a preferred scheme: the TEC temperature control module adopts integrated temperature controller as main control chip.

[0007] As a preferred scheme: the model of integrated temperature controller is MAX1978ETM.

[0008] As a preferred scheme: the TEC temperature control module adopts PWM control signal to control the refrigeration and heating of super radiant light-emitting diode light source TEC module.

[0009] As a preferred scheme: the constant power control module comprises a voltage reference chip and a constant current source chip.

[0010] As a preferred scheme: the model of the voltage reference chip is LT1634.

[0011] As a preferred scheme: the model required by the constant current source chip is LT3092.

[0012] As a preferred scheme: a current limiting resistor is arranged in the constant power control module, and the current limiting resistor is a low-temperature-drift high-precision resistor.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] I. The super-radiation light-emitting diode light source can be provided with stable constant driving current.

[0015] II. The super-radiation light-emitting diode light source TEC module can be controlled to carry out temperature compensation, the light power change caused by temperature change is reduced, and thus the precision index of the fiber gyroscope is improved.

[0016] III. The circuit structure is simple, miniaturized design can be carried out, and the size and weight of the fiber gyroscope are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to facilitate the description, the utility model is described in detail by the following specific embodiments and drawings.

[0018] Figure 1 It is the structure diagram of the utility model;

[0019] Figure 2 It is the circuit principle diagram of the TEC temperature control module in the utility model;

[0020] Figure 3 It is the circuit principle diagram of the constant power control module in the utility model;

[0021] Figure 4 、 Figure 5 It is the PWM control signal waveform of the TEC temperature control module in the utility model. DETAILED DESCRIPTION

[0022] To make the purpose, technical scheme and advantages of the present application more clear, the present application will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the present specification for understanding and reading by those skilled in the art, and are not intended to limit the limiting conditions that can be implemented by the present application, so they do not have substantial technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0023] It should be noted that, in order to avoid obscuring the present application due to unnecessary details, only structures and / or processing steps closely related to the scheme according to the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0024] In combination with Figure 1 The present embodiment adopts the following technical scheme: a TEC temperature control module and a constant power control module, the positive and negative control ends of the TEC temperature control module are connected with the cold end and the hot end of the super radiation light emitting diode light source respectively, for controlling the temperature of the super radiation light emitting diode light source within a set range, the constant power module mainly provides a stable constant driving current for the super radiation light emitting diode light source, and the TEC temperature control module is mainly responsible for cooling and heating control of the TEC module of the super radiation light emitting diode light source.

[0025] In combination with Figure 2 The TEC temperature control module in the present embodiment mainly consists of an integrated temperature controller and a peripheral circuit, the temperature reference value can be set through the resistance and capacitance of the peripheral circuit, the peripheral circuit of the TEC temperature control module all adopts high-precision low-temperature drift resistance, the whole circuit will perform cooling or heating control according to the temperature of the super radiation light emitting diode light source and the set temperature change value, the output end of the constant power control module is connected with the super radiation light emitting diode light source 7-pin, the integrated temperature controller selected for the TEC temperature control module is MAX1978ETM; the integrated temperature controller serves as a master control chip; and the temperature control set value of the TEC temperature control module is 25℃.

[0026] In combination with Figure 3The constant power control module is mainly composed of a voltage reference chip, a constant current source chip and a peripheral protection circuit, the LED is a super radiation LED light source driving circuit indicator light, the voltage reference chip provides a voltage reference for the constant current source, and the output current is changed by adjusting the constant current source through a resistance; the voltage reference chip of the constant power control module is selected from an LT1634, and the constant current source chip of the constant power control module is selected from an LT3092.

[0027] In combination with Figure 4 , Figure 5 The TEC temperature control module controls the super radiation LED light source TEC module to heat through a positive half cycle of a PWM control signal, and controls the super radiation LED light source TEC module to refrigerate through a negative half cycle of the PWM control signal.

[0028] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of the equivalent elements of the claims are intended to be included in the present application.

[0029] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A superluminescent diode light source driving circuit, characterized by: The application relates to a super-radiation light-emitting diode light source, which comprises a TEC temperature control module and a constant-power control module; the positive and negative control ends of the TEC temperature control module are connected with the cold end and the hot end of a super-radiation light-emitting diode light source respectively, and are used for controlling the temperature of the super-radiation light-emitting diode light source within a set range; and the constant-power module mainly provides a stable constant driving current for the super-radiation light-emitting diode light source.

2. A superluminescent diode light source driving circuit according to claim 1, characterized in that: The TEC temperature control module adopts an integrated temperature controller as a main control chip.

3. A superluminescent diode light source driving circuit according to claim 2, characterized in that: The model of the integrated temperature controller is MAX1978ETM.

4. A superluminescent diode light source driving circuit according to claim 2, characterized in that: The TEC temperature control module adopts a PWM control signal to control the refrigeration and heating of the super-radiation light-emitting diode light source TEC module.

5. A superluminescent diode light source driving circuit according to claim 1, characterized in that: The constant-power control module comprises a voltage reference chip and a constant-current source chip.

6. A superluminescent diode light source driving circuit according to claim 5, characterized in that: The model of the voltage reference chip is LT1634.

7. A superluminescent diode light source driving circuit according to claim 5, characterized in that: The model of the constant-current source chip is LT3092.

8. A superluminescent diode light source driving circuit according to claim 5, characterized in that: The constant-power control module is provided with a current-limiting resistor, and the current-limiting resistor is a low-temperature-drift high-precision resistor.

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