Fiber-optic gyroscope debugging tool

Abstract

The utility model discloses a fiber-optic gyroscope debugging tool which comprises a constant current source driving circuit, a temperature control circuit and a power supply circuit, the power supply circuit converts a 220V alternating current power supply into a 5V power supply, and the power supply circuit is integrated with the constant current source driving circuit and the temperature control circuit. The power supply circuit is electrically connected with the constant current source drive circuit and the temperature control circuit and supplies 5V direct current voltage to the constant current source drive circuit and the temperature control circuit. The temperature control circuit is electrically connected with the SLD light source and is used for performing temperature compensation on the SLD light source; the constant current source driving circuit is electrically connected with the SLD light source and used for providing and adjusting working current for the SLD light source. According to the utility model, the 220V alternating current power supply can be directly used, the batch production efficiency of the fiber-optic gyroscope is improved, and the device is suitable for batch production of the fiber-optic gyroscope.

Description

Technical Field

[0001] This utility model belongs to the field of fiber optic gyroscope technology, specifically relating to a fiber optic gyroscope debugging fixture. Background Technology

[0002] Fiber optic gyroscopes are angular rate sensors based on the Sagnac effect. After decades of development, their technology is fully mature. Due to their small size, low cost, long lifespan, high reliability, and wide measurement range, they have been widely used in industry. A fiber optic gyroscope mainly consists of an optical path section and a circuit section. The optical path section mainly comprises five components: an SLD light source, a coupler, a Y-waveguide, a fiber optic loop, and a detector. The circuit section mainly consists of a main board and a light source board.

[0003] Referring to patent CN113970907A, when debugging a fiber optic gyroscope, a fixture mainly composed of a power supply circuit, a temperature control circuit, a constant current source drive circuit, and an adjustable matching resistor circuit (which can be set within the constant current source drive circuit) is used to debug the fiber optic gyroscope. However, most current power supply circuits use ±5V voltage, which cannot be directly connected to the ubiquitous 220V AC power supply. It is necessary to use a DC regulated power supply to convert the 220V AC power supply to ±5V voltage before connecting it to the power supply circuit, which limits the scope of use of the fixture and reduces production efficiency. Utility Model Content

[0004] In view of this, the present invention provides a fiber optic gyroscope debugging fixture, which integrates a power supply circuit that converts 220V AC to 5V DC, allowing direct use of 220V AC power, improving the efficiency of mass production of fiber optic gyroscopes, and adapting to the mass production of fiber optic gyroscopes.

[0005] This utility model is achieved through the following technical solution:

[0006] A fiber optic gyroscope debugging fixture includes: a constant current source drive circuit, a temperature control circuit, and a power supply circuit; an SLD light source is installed inside the fiber optic gyroscope;

[0007] The power supply circuit converts 220V AC power to 5V power, and the power supply circuit is integrated with the constant current source drive circuit and the temperature control circuit. The power supply circuit is electrically connected to the constant current source drive circuit and the temperature control circuit respectively, and supplies 5V DC voltage to the constant current source drive circuit and the temperature control circuit respectively.

[0008] The temperature control circuit is electrically connected to the SLD light source and is used for temperature compensation of the SLD light source;

[0009] The constant current source drive circuit is electrically connected to the SLD light source and is used to provide and adjust the operating current of the SLD light source.

[0010] Further, the power supply circuit comprises a transformer circuit, a rectifier circuit, a filter circuit and a voltage stabilizing circuit;

[0011] The transformer circuit is used for converting the input 220V AC into a set AC voltage;

[0012] The rectifier circuit is used for rectifying the set AC voltage into a 5V pulsating DC voltage;

[0013] The voltage stabilizing circuit is used for stabilizing the 5V pulsating DC voltage to form a stable 5V DC voltage;

[0014] The filter circuit is used for filtering.

[0015] Further, the transformer circuit adopts a transformer T1, the rectifier circuit adopts a rectifier bridge circuit composed of diodes D1, D2, D3 and D4, the filter circuit comprises capacitors C24 and C25, and the voltage stabilizing circuit adopts a voltage stabilizer N2;

[0016] The 220V AC is electrically connected with a primary coil of the transformer T1, a positive electrode of the diode D1 and a negative electrode of the diode D3 are electrically connected with one end of a secondary coil of the transformer T1, and a positive electrode of the diode D2 and a negative electrode of the diode D4 are electrically connected with the other end of the secondary coil of the transformer T1;

[0017] The voltage stabilizer N2 comprises three pins, namely a Vin pin, a GND pin and a Vout pin;

[0018] A negative electrode of the diode D1 and a negative electrode of the diode D2 are electrically connected with the Vin pin of the voltage stabilizer N2, a positive electrode of the diode D3, a positive electrode of the diode D4 and the GND pin of the voltage stabilizer N2 are all connected with a reference ground GND of the temperature control circuit, the voltage stabilizer stabilizes the input pulsating DC voltage at 5V and outputs through the Vout pin;

[0019] The capacitor C24 is connected in parallel between the Vin pin and the reference ground GND;

[0020] The capacitor C25 is connected in parallel between the Vout pin and the reference ground GND.

[0021] Further, the power supply circuit further comprises a noise reduction circuit;

[0022] One end of the noise reduction circuit is electrically connected with the Vout pin of the voltage stabilizer N2, and the other end is electrically connected with the temperature control circuit;

[0023] The noise reduction circuit comprises capacitors C7, C15, a magnetic bead L2, capacitors C2 and C3;

[0024] The ferrite bead L2 has two pins, namely ferrite bead pin I and ferrite bead pin II. Ferrite bead pin I is electrically connected to the Vout pin of the voltage regulator N2, and ferrite bead pin II is electrically connected to the temperature control circuit.

[0025] One pin of capacitor C7 is electrically connected to pin I of the ferrite bead, and the other pin is connected to reference ground GND. Capacitor 15 is connected in parallel with capacitor C7. One pin of capacitor C3 is electrically connected to pin II of the ferrite bead, and the other pin is connected to reference ground GND. Capacitor C2 is connected in parallel with capacitor C3.

[0026] Furthermore, the power supply circuit also includes a buffer circuit;

[0027] One end of the buffer circuit is electrically connected to the Vout pin of the voltage regulator N2, and the other end is electrically connected to the constant current source drive circuit.

[0028] The buffer circuit includes capacitor C19, capacitor C21, inductor L3, capacitor C22, and capacitor C23;

[0029] Inductor L3 has two pins, namely inductor pin I and inductor pin II; inductor pin I is electrically connected to the Vout pin of voltage regulator N2, and inductor pin II is electrically connected to the constant current source drive circuit.

[0030] One pin of capacitor C19 is electrically connected to inductor pin I, and the other pin is connected to the reference ground GNDH of the constant current source drive circuit; capacitor C21 is connected in parallel with capacitor C19;

[0031] One pin of capacitor C22 is electrically connected to inductor pin II, and the other pin is connected to the reference ground GNDH of the constant current source drive circuit. Capacitor C23 is connected in parallel with capacitor C22.

[0032] Reference ground GNDH and reference ground GND are shorted together by a 0Ω resistor R0.

[0033] Beneficial effects:

[0034] (1) The fiber optic gyroscope debugging fixture provided by this utility model converts 220V AC power to 5V power and integrates it with constant current source drive circuit and temperature control circuit. It can directly use common 220V AC power to debug fiber optic gyroscopes without the need for external power supply equipment such as DC regulated power supply. This avoids the production progress being affected by the limited number of external power supply equipment, thereby improving the mass production efficiency of fiber optic gyroscopes and adapting to the mass production of fiber optic gyroscopes.

[0035] (2) The power supply circuit provided by this utility model includes a transformer circuit, a rectifier circuit, a filter circuit and a voltage regulator circuit, which helps to reduce voltage fluctuations and provide a more stable DC output.

[0036] (3) The capacitor C24 is arranged in parallel between the Vin pin and the reference ground GND in the power supply circuit, is used for smoothing the 5V pulsating direct current voltage after rectification, reduces voltage fluctuation, provides more stable direct current output, the capacitor C25 is arranged in parallel between the Vout pin and the reference ground GND, further smoothes the 5V direct current voltage output by the voltage stabilizer N2, reduces voltage fluctuation, and provides more stable 5V direct current output.

[0037] (4) The power supply circuit further comprises a noise reduction circuit, can inhibit high-frequency noise interference and peak interference on the signal line and the power line, and ensures the normal work of the control chip in the temperature control circuit (in the example, the ADN8831 chip is arranged in the temperature control circuit).

[0038] (5) The power supply circuit further comprises a buffer circuit, can buffer the opening and closing of the constant current source driving circuit, and ensures the reliability of the debugging tooling circuit.

[0039] In summary, the tooling of the utility model has low cost, stable voltage output of the power supply circuit, simple operation, strong reusability, and is beneficial to improving the batch production efficiency of the fiber optic gyroscope. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is the circuit connection diagram of the fiber optic gyroscope debugging tooling and SLD light source of the utility model;

[0041] Figure 2 It is the voltage processing flow chart of the power supply circuit of the utility model;

[0042] Figure 3 It is the circuit diagram of the power supply circuit of the utility model;

[0043] Among them, 1 is a power supply circuit, 2 is a temperature control circuit, 3 is a constant current source driving circuit, and 4 is an SLD light source. DETAILED DESCRIPTION

[0044] The utility model will be described in detail in combination with the drawings and examples.

[0045] Example 1:

[0046] The embodiment provides a fiber optic gyroscope debugging tooling, referring to the attached Figure 1 , comprising a constant current source driving circuit 3, a temperature control circuit 2 and a power supply circuit 1;The fiber optic gyroscope is provided with an SLD light source 4;

[0047] The power supply circuit 1 converts 220V alternating current power into 5V power, and the power supply circuit 1 is integrally arranged with the constant current source driving circuit 3 and the temperature control circuit 2, and the power supply circuit 1 is electrically connected with the constant current source driving circuit 3 and the temperature control circuit 2 respectively, so as to supply 5V direct current voltage for the constant current source driving circuit 3 and the temperature control circuit 2 respectively.

[0048] The temperature control circuit 2 is electrically connected with the SLD light source 4, and is used for temperature compensation of the SLD light source 4.

[0049] The constant current source driving circuit 3 is electrically connected with the SLD light source 4, and is used for providing and adjusting working current for the SLD light source 4.

[0050] The power supply circuit 1 converts 220V alternating current power into 5V power, and the power supply circuit 1 is integrally arranged with the constant current source driving circuit 3 and the temperature control circuit 2, and the power supply circuit 1 is electrically connected with the constant current source driving circuit 3 and the temperature control circuit 2 respectively, so as to supply 5V direct current voltage for the constant current source driving circuit 3 and the temperature control circuit 2 respectively.

[0051] Referring to FIG. 1, Figure 2 The power supply circuit 1 comprises a transformer circuit, a rectifier circuit, a filter circuit and a voltage stabilizing circuit.

[0052] The transformer circuit is used for converting input 220V alternating current into a set alternating voltage, the rectifier circuit is used for rectifying the set alternating voltage into 5V pulsating direct current voltage, the voltage stabilizing circuit is used for stabilizing the 5V pulsating direct current voltage to form stable 5V direct current voltage, and the filter circuit is used for filtering to reduce voltage fluctuation and provide more stable direct current output.

[0053] Referring to FIG. 1, Figure 3 The transformer circuit adopts a transformer T1, the rectifier circuit is a rectifier bridge circuit composed of diodes D1, D2, D3 and D4, the filter circuit comprises capacitors C24 and C25, and the voltage stabilizing circuit adopts a voltage stabilizer N2.

[0054] 220V alternating current is electrically connected with a primary coil of the transformer T1, a positive electrode of the diode D1 and a negative electrode of the diode D3 are electrically connected with one end of a secondary coil of the transformer T1, and a positive electrode of the diode D2 and a negative electrode of the diode D4 are electrically connected with the other end of the secondary coil of the transformer T1.

[0055] The voltage stabilizer N2 comprises three pins, which are a Vin pin, a GND pin and a Vout pin.

[0056] The negative pole of the diode D1 and the negative pole of the diode D2 are electrically connected with the Vin pin of the voltage stabilizer N2, the positive pole of the diode D3, the positive pole of the diode D4 and the GND pin of the voltage stabilizer N2 are all connected with the reference ground GND of the temperature control circuit 2; the voltage stabilizer stabilizes the input pulsed direct current voltage at 5V and outputs through the Vout pin;

[0057] The capacitor C24 is arranged in parallel between the Vin pin and the reference ground GND, for smoothing the rectified 5V pulsed direct current voltage, reducing voltage fluctuation and providing more stable direct current output.

[0058] The capacitor C25 is arranged in parallel between the Vout pin and the reference ground GND, for further smoothing the 5V direct current voltage output by the voltage stabilizer N2, reducing voltage fluctuation and providing more stable 5V direct current output.

[0059] In one specific embodiment, the diode D1, the diode D2, the diode D3 and the diode D4 all adopt the diode with the model IN4007, the voltage stabilizer N2 adopts the linear voltage stabilizer with the model LM7805; the capacitor C24 adopts the electrolytic capacitor with 2200 microfarad (μF), and the capacitor C25 adopts the electrolytic capacitor with 470 microfarad (μF).

[0060] Working principle:

[0061] 220V voltage is converted into a set AC voltage through the transformer T1, the set AC voltage is rectified into a 5V pulsed direct current voltage through the rectifier bridge circuit, the capacitor C24 smoothes the rectified 5V pulsed direct current voltage, reduces voltage fluctuation, the voltage stabilizing circuit is used for voltage stabilizing the 5V pulsed direct current voltage, outputs 5V direct current voltage, the capacitor C25 further smoothes the 5V direct current voltage output by the voltage stabilizer N2, reduces voltage fluctuation, through the above-mentioned voltage conversion, rectification, filtering, voltage stabilizing and secondary filtering, the power supply circuit 1 realizes the conversion of 220V AC into stable 5V DC, supplies the temperature control circuit 2 and the constant current source driving circuit 3 for fiber optic gyroscope debugging, has low tooling cost, simple operation, strong reusability and can greatly improve the fiber optic gyroscope batch production rate, and is suitable for batch production of fiber optic gyroscopes.

[0062] Embodiment 2:

[0063] This embodiment is based on the embodiment 1, referring to the attached Figure 3 The power supply circuit 1 further comprises a noise reduction circuit and a buffer circuit;

[0064] One end of the noise reduction circuit is electrically connected with the Vout pin of the voltage stabilizer N2, the other end is the VCC end and is electrically connected with the temperature control circuit 2, for reducing high-frequency noise interference and peak interference;

[0065] One end of the buffer circuit is electrically connected with the Vout pin of the voltage stabilizer N2, and the other end outputs +5V voltage and is electrically connected with the constant current source driving circuit 3, and is used for buffering and protecting the opening and closing of the constant current source driving circuit 3.

[0066] In one embodiment, the noise reduction circuit comprises a capacitor C7, a capacitor C15, a magnetic bead L2, a capacitor C2 and a capacitor C3.

[0067] The magnetic bead L2 comprises two pins, namely a magnetic bead pin I and a magnetic bead pin II, the magnetic bead pin I is electrically connected with the Vout pin of the voltage stabilizer N2, and the magnetic bead pin II is electrically connected with the temperature control circuit 2.

[0068] One pin of the capacitor C7 is electrically connected with the magnetic bead pin I, and the other pin is connected with the reference ground GND, and the capacitor 15 is connected with the capacitor C7 in parallel; one pin of the capacitor C3 is electrically connected with the magnetic bead pin II, and the other pin is connected with the reference ground GND, and the capacitor C2 is connected with the capacitor C3 in parallel.

[0069] In one embodiment, the buffer circuit comprises a capacitor C19, a capacitor C21, an inductor L3, a capacitor C22 and a capacitor C23.

[0070] The inductor L3 comprises two pins, namely an inductor pin I and an inductor pin II; the inductor pin I is electrically connected with the Vout pin of the voltage stabilizer N2, and the inductor pin II is electrically connected with the constant current source driving circuit 3.

[0071] One pin of the capacitor C19 is electrically connected with the inductor pin I, and the other pin is connected with the reference ground GNDH of the constant current source driving circuit 3; the capacitor C21 is connected with the capacitor C19 in parallel.

[0072] One pin of the capacitor C22 is electrically connected with the inductor pin II, and the other pin is connected with the reference ground GNDH of the constant current source driving circuit 3, and the capacitor C23 is connected with the capacitor C22 in parallel.

[0073] The reference ground GNDH and the reference ground GND are short-circuited through the 0Ω resistor R0.

[0074] In one specific embodiment, the capacitor C7, the capacitor C2, the capacitor C21, the capacitor C23 are all 0.1 mu F, the capacitor C15, the capacitor C3, the capacitor C19 and the capacitor C22 are all 10 mu F / 10V, the selected model of the magnetic bead L2 is FB2012-6013A, and the selected model of the inductor L3 is FW10805-8R2K.

[0075] To sum up, the above is only a preferred embodiment of the utility model, and is not used for limiting the protection scope of the utility model. Any modification, equivalent replacement, improvement and the like made in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An optical fiber gyroscope debugging tool, characterized in that, The application relates to a constant-current source driving circuit, a temperature control circuit and a power supply circuit, and an SLD light source is arranged in an optical fiber gyroscope. The power supply circuit converts 220V alternating current into 5V power supply, and the power supply circuit is integrally arranged with the constant-current source driving circuit and the temperature control circuit; the power supply circuit is electrically connected with the constant-current source driving circuit and the temperature control circuit, and supplies 5V direct current voltage to the constant-current source driving circuit and the temperature control circuit. The temperature control circuit is electrically connected with the SLD light source, and is used for temperature compensation of the SLD light source. The constant-current source driving circuit is electrically connected with the SLD light source, and is used for providing and adjusting working current of the SLD light source. The power supply circuit comprises a transformer circuit, a rectifier circuit, a filter circuit and a voltage stabilizing circuit.

2. The fiber optic gyroscope tuning tool of claim 1, wherein, The transformer circuit is used for converting input 220V alternating current into set alternating voltage. The rectifier circuit is used for rectifying the set alternating voltage into 5V pulsating direct current voltage. The voltage stabilizing circuit is used for stabilizing the 5V pulsating direct current voltage, and forms stable 5V direct current voltage. The filter circuit is used for filtering. The transformer circuit adopts a transformer T1, the rectifier circuit adopts a rectifier bridge circuit composed of diodes D1, D2, D3 and D4, the filter circuit comprises capacitors C24 and C25, and the voltage stabilizing circuit adopts a voltage stabilizer N2.

3. The fiber optic gyroscope tuning tool of claim 2, wherein the fiber optic gyroscope tuning tool is configured to be mounted to a fiber optic gyroscope. 220V alternating current is electrically connected with a primary coil of the transformer T1; a positive electrode of the diode D1 and a negative electrode of the diode D3 are electrically connected with one end of a secondary coil of the transformer T1; a positive electrode of the diode D2 and a negative electrode of the diode D4 are electrically connected with the other end of the secondary coil of the transformer T1. The voltage stabilizer N2 comprises three pins, namely a Vin pin, a GND pin and a Vout pin. A negative electrode of the diode D1 and a negative electrode of the diode D2 are electrically connected with the Vin pin of the voltage stabilizer N2; a positive electrode of the diode D3, a positive electrode of the diode D4 and the GND pin of the voltage stabilizer N2 are all connected with a reference ground GND of the temperature control circuit; the voltage stabilizer stabilizes input pulsating direct current voltage at 5V, and outputs through the Vout pin. The capacitor C24 is arranged in parallel between the Vin pin and the reference ground GND. The capacitor C25 is arranged in parallel between the Vout pin and the reference ground GND. The power supply circuit further comprises a noise reduction circuit.

4. The fiber optic gyroscope tuning tool of claim 3, wherein the fiber optic gyroscope tuning tool is configured to be mounted to a fiber optic gyroscope. One end of the noise reduction circuit is electrically connected with the Vout pin of the voltage stabilizer N2, and the other end is electrically connected with the temperature control circuit. The noise reduction circuit comprises capacitors C7, C15, a magnetic bead L2, a capacitor C2 and a capacitor C3. The magnetic bead L2 comprises two pins, namely a magnetic bead pin I and a magnetic bead pin II; the magnetic bead pin I is electrically connected with the Vout pin of the voltage stabilizer N2, and the magnetic bead pin II is electrically connected with the temperature control circuit. One pin of the capacitor C7 is electrically connected with the magnetic bead pin I, and the other pin is connected with the reference ground GND; the capacitor C15 is connected in parallel with the capacitor C7; one pin of the capacitor C3 is electrically connected with the magnetic bead pin II, and the other pin is connected with the reference ground GND; the capacitor C2 is connected in parallel with the capacitor C3. The power supply circuit further comprises a buffer circuit.

5. The fiber optic gyroscope tuning tool of claim 3 or 4, wherein the fiber optic gyroscope tuning tool is configured to be mounted to a fiber optic gyroscope. One end of the buffer circuit is electrically connected with the Vout pin of the voltage stabilizer N2, and the other end is electrically connected with the constant-current source driving circuit. ​ The buffer circuit comprises a capacitor C19, a capacitor C21, an inductor L3, a capacitor C22 and a capacitor C23; The inductor L3 comprises two pins, i.e. an inductor pin I and an inductor pin II; the inductor pin I is electrically connected with a Vout pin of the voltage stabilizer N2, and the inductor pin II is electrically connected with the constant current source driving circuit; One pin of the capacitor C19 is electrically connected with the inductor pin I, and the other pin is connected with a reference ground GNDH of the constant current source driving circuit; the capacitor C21 is connected in parallel with the capacitor C19; One pin of the capacitor C22 is electrically connected with the inductor pin II, and the other pin is connected with the reference ground GNDH of the constant current source driving circuit; the capacitor C23 is connected in parallel with the capacitor C22; The reference ground GNDH is short-circuited with the reference ground GND through a 0Ω resistor R0.

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