A self-recovery output voltage circuit

Abstract

This application discloses a self-recovery output voltage circuit, relating to the field of aerospace technology, comprising at least: a first isolated DC / DC power supply module, a second isolated DC / DC power supply module, a third isolated DC / DC power supply module, an operational amplifier, an internal bus, and an analog acquisition module. This application utilizes a flexible and convenient method for acquiring the voltage of a secondary power supply bus, resolving the issue of reduced acquisition accuracy due to cable voltage drop. This also reduces the design difficulty of the onboard cable network, facilitating simplified design of the onboard cable network.

Description

Technical Field

[0001] The present application relates to the field of aerospace technology, and in particular to a self-recovery output voltage circuit. Background Art

[0002] In recent years, launch vehicle technology has rapidly advanced, resulting in a wide variety of rocket types both domestically and internationally. The onboard power supply of the avionics system is crucial within the entire rocket system, necessitating a precise and reliable method for collecting and monitoring output voltages. This is typically accomplished through a measurement system that monitors voltage signals from the primary and secondary power busbars on the rocket.

[0003] Currently, the voltage signal of the power supply bus is usually collected by an external cable network. After the output voltage is introduced to the collection device through the cable network, the collection device then sends the collected voltage value to the monitoring device.

[0004] However, there are the following problems with using an external cable network to collect the voltage signal of the power supply bus:

[0005] (1) When the collection point is far away from the collection equipment, the cable network will produce voltage drop, which will affect the collection accuracy.

[0006] (2) The method of using an external cable network to collect the power supply voltage will also cause the problem of complex technology and high cost of the arrow cable network. Summary of the Invention

[0007] The purpose of this application is to provide a self-recovery output voltage circuit, which uses a flexible and simple method to collect the voltage of the secondary power supply bus, solves the problem of reduced collection accuracy caused by cable voltage drop, and also reduces the design difficulty of the arrow cable network, facilitating the simplified design of the arrow cable network.

[0008] In order to achieve the above-mentioned purpose, the present application provides a self-recovery output voltage circuit, which at least includes: a first isolated DC / DC power supply module, a second isolated DC / DC power supply module, a third isolated DC / DC power supply module, an operational amplifier, an internal bus and an analog acquisition module; wherein, the first isolated DC / DC power supply module is connected to a peripheral device to provide the peripheral device with a first power supply voltage obtained after converting the input voltage; the first isolated DC / DC power supply module is connected to the operational amplifier to provide the operational amplifier with a first power supply voltage; the first isolated DC / DC power supply module is connected to the second isolated DC / DC power supply module to provide the second isolated DC / DC power supply module with a first power supply voltage; the second isolated DC / DC power supply module is connected to the peripheral device to provide the peripheral device with a second power supply voltage obtained after converting the first power supply voltage; the second isolated DC / DC power supply module is connected to the operational amplifier to provide The operational amplifier provides a second power supply voltage obtained by converting the first power supply voltage; the third isolated DC / DC power supply module is connected to the peripheral device, and provides the peripheral device with a third power supply voltage obtained by converting the output voltage; the third isolated DC / DC power supply module is connected to the operational amplifier, and provides the operational amplifier with a third power supply voltage; the operational amplifier is connected to the internal bus, and provides the internal bus with a first conversion voltage obtained by converting the first power supply voltage, a second conversion voltage obtained by converting the second power supply voltage, and a third conversion voltage obtained by converting the third power supply voltage; the internal bus is connected to the analog acquisition module, and the internal bus forwards the first conversion voltage, the second conversion voltage, and the third conversion voltage to the analog acquisition module, and the analog acquisition module performs voltage signal acquisition on the first conversion voltage, the second conversion voltage, and the third conversion voltage to obtain a first acquisition voltage value, a second acquisition voltage value, and a third acquisition voltage value.

[0009] As above, the first supply voltage, the second supply voltage and the third supply voltage are all different.

[0010] As above, the internal bus is a 68-core rectangular connector.

[0011] As above, the first isolated DC / DC power supply module has a positive input terminal, a negative input terminal, a first positive polarity terminal, a second positive polarity terminal and a third positive polarity terminal; wherein the positive input terminal of the first isolated DC / DC power supply module is connected to the positive end of the input voltage; the negative input terminal of the first isolated DC / DC power supply module is connected to the negative end of the input voltage; the first positive polarity terminal of the first isolated DC / DC power supply module is connected to the peripheral device; the second positive polarity terminal of the first isolated DC / DC power supply module is connected to the first in-phase input terminal of the operational amplifier; the third positive polarity terminal of the first isolated DC / DC power supply module is connected to the second isolated DC / DC power supply module.

[0012] As above, the second isolated DC / DC power supply module has a positive input terminal, a negative input terminal, a first positive polarity terminal, a second positive polarity terminal and a third positive polarity terminal; wherein the positive input terminal and the negative input terminal of the second isolated DC / DC power supply module are both connected to the third positive polarity terminal of the first isolated DC / DC power supply module; the first positive polarity terminal of the second isolated DC / DC power supply module is connected to the peripheral device; the second positive polarity terminal of the second isolated DC / DC power supply module is connected to the second non-inverting input terminal of the operational amplifier.

[0013] As above, the third isolated DC / DC power supply module has a positive input terminal, a negative input terminal, a first positive polarity terminal, a second positive polarity terminal and a third positive polarity terminal; wherein the positive input terminal of the third isolated DC / DC power supply module is connected to the positive terminal of the output voltage; the negative input terminal of the third isolated DC / DC power supply module is connected to the negative terminal of the output voltage; the first positive polarity terminal of the third isolated DC / DC power supply module is connected to the peripheral device; the second positive polarity terminal of the third isolated DC / DC power supply module is connected to the third in-phase input terminal of the operational amplifier.

[0014] As above, wherein the first conversion voltage is within a first voltage range.

[0015] As above, wherein the second conversion voltage is within the second voltage range.

[0016] As above, wherein the third conversion voltage is within a third voltage range.

[0017] As above, the analog acquisition module sends the first acquired voltage value, the second acquired voltage value and the third acquired voltage value to the monitoring device, and the monitoring device judges the stability of the power supply voltage through the first conversion voltage, the second conversion voltage and the third conversion voltage, as well as the first acquired voltage value, the second acquired voltage value and the second acquired voltage value. When the first acquired voltage value is within the first voltage range, the power supply voltage output corresponding to the first isolated DC / DC power supply module is stable; when the first acquired voltage value is outside the first voltage range, the power supply voltage output corresponding to the first isolated DC / DC power supply module is unstable; when the second acquired voltage value is within the second voltage range, the power supply voltage output corresponding to the second isolated DC / DC power supply module is stable; when the second acquired voltage value is outside the second voltage range, the power supply voltage output corresponding to the second isolated DC / DC power supply module is unstable; when the third acquired voltage value is within the third voltage range, the power supply voltage output corresponding to the third isolated DC / DC power supply module is stable; when the third acquired voltage value is outside the third voltage range, the power supply voltage output corresponding to the third isolated DC / DC power supply module is unstable.

[0018] The beneficial effects achieved by this application are as follows:

[0019] (1) The self-collecting output voltage circuit of the present application adopts a single-machine internal bus to transmit the converted voltage to the analog acquisition module, which can simply and conveniently collect the voltage of the secondary power supply bus through the internal bus without the need to design an external acquisition cable separately, effectively reducing the problem of low acquisition accuracy caused by cable voltage drop and improving the acquisition accuracy; at the same time, it can also simplify the cable network design and reduce the complexity of the cable network design.

[0020] (2) The self-recovery output voltage circuit of the present application adopts an isolated DC / DC power supply module (i.e., a first isolated DC / DC power supply module, a second isolated DC / DC power supply module, and a third isolated DC / DC power supply module), which can physically isolate the input voltage from the output voltage.

[0021] (3) The self-recovery output voltage circuit of the present application adopts multiple isolated DC / DC power supply modules (i.e., a first isolated DC / DC power supply module, a second isolated DC / DC power supply module, and a third isolated DC / DC power supply module), which can provide different power supply voltages (e.g., a first power supply voltage, a second power supply voltage, and a third power supply voltage) for external devices (i.e., peripheral devices).

[0022] (4) The self-collecting output voltage circuit of the present application converts the output voltage into a voltage value within the acquisition range of the analog acquisition module through an operational amplifier, thereby ensuring that the analog acquisition module can collect data normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 This is a structural diagram of an embodiment of a self-recovery output voltage circuit. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0026] like Figure 1As shown, the present application provides a self-recovery output voltage circuit, which at least includes: a first isolated DC / DC power supply module 1, a second isolated DC / DC power supply module 2, a third isolated DC / DC power supply module 3, an operational amplifier 4, an internal bus 5 and an analog acquisition module 6. Among them, the first isolated DC / DC power supply module 1 is connected to a peripheral device to provide the peripheral device with a first power supply voltage (OUT1) obtained after converting the input voltage; the first isolated DC / DC power supply module 1 is connected to the operational amplifier 4 to provide the operational amplifier 4 with the first power supply voltage (OUT1); the first isolated DC / DC power supply module 1 is connected to the second isolated DC / DC power supply module 2 to provide the second isolated DC / DC power supply module 2 with the first power supply voltage (OUT1). The second isolated DC / DC power supply module 2 is connected to a peripheral device to provide the peripheral device with a second power supply voltage (OUT2) obtained after converting the first power supply voltage (OUT1); the second isolated DC / DC power supply module 2 is connected to the operational amplifier 4 to provide the operational amplifier 4 with the second power supply voltage (OUT2) obtained after converting the first power supply voltage (OUT1). The third isolated DC / DC power supply module 3 is connected to a peripheral device and provides the peripheral device with a third power supply voltage (OUT3) obtained by converting the output voltage. The third isolated DC / DC power supply module 3 is connected to an operational amplifier 4 and provides the operational amplifier 4 with the third power supply voltage (OUT3). The operational amplifier 4 is connected to an internal bus 5 and provides the internal bus 5 with a first converted voltage obtained by converting the first power supply voltage (OUT1), a second converted voltage obtained by converting the second power supply voltage (OUT2), and a third converted voltage obtained by converting the third power supply voltage (OUT3). The internal bus 5 is connected to an analog quantity acquisition module 6, which forwards the first, second, and third converted voltages to the analog quantity acquisition module 6. The analog quantity acquisition module 6 then acquires voltage signals of the first, second, and third converted voltages to obtain first, second, and third acquired voltage values.

[0027] Among them, the specific model of the first isolated DC / DC power supply module 1 is selected according to actual conditions. For example, the model of the first isolated DC / DC power supply module 1 is ZTR28S15V(F) / 40W, but is not limited to ZTR28S15V(F) / 40W.

[0028] The specific model of the second isolated DC / DC power supply module 2 is selected according to actual conditions. For example, the model of the second isolated DC / DC power supply module 2 is LMZ12003TZ, but is not limited to LMZ12003TZ.

[0029] The specific model of the third isolated DC / DC power supply module 3 is selected according to actual conditions. For example, the model of the second isolated DC / DC power supply module 3 is ZHF28S15VF / 20W, but is not limited to ZHF28S15VF / 20W.

[0030] The specific model of the operational amplifier 4 is selected according to the actual situation, for example, the model of the operational amplifier 4 is 8684. In this application, it is preferred that the operational amplifier 4 is an AD operational amplifier (ie, an operational amplifier produced by AD Company of the United States).

[0031] The internal bus 5 is a transfer connector for transferring voltage signals.

[0032] Specifically, the adapter connector can be implemented using existing equipment, such as a 68-core rectangular connector (i.e., a connector with a rectangular shape of 68 pins or sockets, used for connection, signal transmission, power supply, etc.), but it is not limited to a 68-core rectangular connector, and can also be other devices that can connect, transmit signals, power supply, etc.

[0033] The analog quantity acquisition module 6 is an integrated module, which is used to acquire the voltage value output by the operational amplifier through an internal bus (ie, a transfer connector).

[0034] Specifically, as an embodiment, the analog quantity acquisition module 6 only needs to be able to realize the acquisition function, but is not limited to being able to realize the acquisition function.

[0035] The specific type of peripheral devices connected to the first isolated DC / DC power supply module 1 is set according to actual conditions, for example: various sensors and converters such as pressure, temperature, and heat flow powered by the first supply voltage (OUT1).

[0036] The specific type of peripheral devices connected to the second isolated DC / DC power supply module 2 is set according to actual conditions, for example: various sensors and converters such as pressure, temperature, and heat flow powered by the second power supply voltage (OUT2).

[0037] The specific type of peripheral devices connected to the third isolated DC / DC power supply module 3 is set according to actual conditions, for example: various sensors and converters such as pressure, temperature, and heat flow powered by the third power supply voltage (OUT3).

[0038] Furthermore, the specific values ​​of the first supply voltage (OUT1), the second supply voltage (OUT2) and the third supply voltage (OUT3) are all set according to actual conditions. In the present application, it is preferred that the first supply voltage (OUT1), the second supply voltage (OUT2) and the third supply voltage (OUT3) are all different, that is, the first supply voltage (OUT1), the second supply voltage (OUT2) and the third supply voltage (OUT3) are three different voltage values.

[0039] Specifically, when the power supply and output signal recovery of the arrow sensor are provided by the same single-machine device, the self-recovery output voltage circuit of the present application can select corresponding output voltage values ​​(i.e., the first supply voltage, the second supply voltage and the third supply voltage) to power the corresponding peripheral devices. For example, the peripheral device connected to the first isolated DC / DC power supply module 1 selects the first supply voltage for power supply, the peripheral device connected to the second isolated DC / DC power supply module 2 selects the second supply voltage for power supply, and the peripheral device connected to the third isolated DC / DC power supply module 3 selects the third supply voltage for power supply.

[0040] Furthermore, after the converted output voltage values ​​(i.e., the first conversion voltage, the second conversion voltage, and the third conversion voltage) are transmitted to the analog acquisition module 6 through the internal bus 5, the stability of the supply voltage is judged by the converted output voltage values ​​(i.e., the first conversion voltage, the second conversion voltage, and the third conversion voltage) and the collected voltage values ​​(i.e., the first collected voltage value, the second collected voltage value, and the second collected voltage value). If the first collected voltage value is consistent with the first conversion voltage, the supply voltage output corresponding to the first isolated DC / DC power supply module 1 is stable; if the first collected voltage value is inconsistent with the first conversion voltage, the supply voltage output corresponding to the first isolated DC / DC power supply module 1 is unstable; if the second collected voltage value is consistent with the second conversion voltage, the supply voltage output corresponding to the second isolated DC / DC power supply module 2 is stable; if the second collected voltage value is inconsistent with the second conversion voltage, the supply voltage output corresponding to the second isolated DC / DC power supply module 2 is unstable; if the third collected voltage value is consistent with the third conversion voltage, the supply voltage output corresponding to the third isolated DC / DC power supply module 3 is stable; if the third collected voltage value is inconsistent with the third conversion voltage, the supply voltage output corresponding to the third isolated DC / DC power supply module 3 is unstable.

[0041] Furthermore, the first isolated DC / DC power supply module 1 has a positive input terminal (IN+), a negative input terminal (IN-), a first positive polarity terminal, a second positive polarity terminal and a third positive polarity terminal; wherein, the positive input terminal (IN+) of the first isolated DC / DC power supply module 1 is connected to the positive end of the input voltage; the negative input terminal (IN-) of the first isolated DC / DC power supply module 1 is connected to the negative end of the input voltage; the first positive polarity terminal of the first isolated DC / DC power supply module 1 is connected to the peripheral device; the second positive polarity terminal of the first isolated DC / DC power supply module is connected to the first in-phase input terminal (+INA) of the operational amplifier 4; the third positive polarity terminal of the first isolated DC / DC power supply module 1 is connected to the second isolated DC / DC power supply module 2.

[0042] Furthermore, the second isolated DC / DC power supply module 2 has a positive input terminal (IN+), a negative input terminal (IN-), a first positive polarity terminal, a second positive polarity terminal and a third positive polarity terminal; wherein, the positive input terminal (IN+) and the negative input terminal (IN-) of the second isolated DC / DC power supply module 2 are both connected to the third positive polarity terminal of the first isolated DC / DC power supply module 1; the first positive polarity terminal of the second isolated DC / DC power supply module 2 is connected to the peripheral device; the second positive polarity terminal of the second isolated DC / DC power supply module 2 is connected to the second in-phase input terminal (+INB) of the operational amplifier 4.

[0043] Furthermore, the third isolated DC / DC power supply module 3 has a positive input terminal (IN+), a negative input terminal (IN-), a first positive polarity terminal, a second positive polarity terminal and a third positive polarity terminal; wherein, the positive input terminal (IN+) of the third isolated DC / DC power supply module 3 is connected to the positive end of the output voltage; the negative input terminal (IN-) of the third isolated DC / DC power supply module 3 is connected to the negative end of the output voltage; the first positive polarity terminal of the third isolated DC / DC power supply module 3 is connected to the peripheral device; the second positive polarity terminal of the third isolated DC / DC power supply module 3 is connected to the third in-phase input terminal (+INC) of the operational amplifier 4.

[0044] Furthermore, the specific value of the first conversion voltage is set according to actual conditions. In the present application, it is preferred that the first conversion voltage is within the first voltage range.

[0045] Furthermore, the specific value of the first voltage range is set according to actual conditions. In this application, the first voltage range is preferably [4.5V-0.48V, 4.5V+0.48V], but is not limited to [4.5V-0.48V, 4.5V+0.48V].

[0046] Furthermore, the specific value of the second conversion voltage is set according to actual conditions, and the present application preferably configures the second conversion voltage to be within the second voltage range.

[0047] Furthermore, the specific value of the second voltage range is set according to actual conditions. In this application, the second voltage range is preferably [3.5V-0.48V, 3.5V+0.48V], but not limited to [3.5V-0.48V, 3.5V+0.48V].

[0048] Furthermore, the specific value of the third conversion voltage is set according to actual conditions. In the present application, it is preferred that the third conversion voltage is within a third voltage range.

[0049] Furthermore, the specific value of the third voltage range is set according to actual conditions. In this application, the third voltage range is preferably [4.5V-0.48V, 4.5V+0.48V], but is not limited to [4.5V-0.48V, 4.5V+0.48V].

[0050] Specifically, the input voltage is converted into the voltage required by the arrow device (i.e., OUT1) through the first isolated DC / DC power supply module 1. On the one hand, the first power supply voltage is directly forwarded to the peripheral device to provide OUT1 for the peripheral device. On the other hand, the first power supply voltage is converted into a voltage within a first voltage range (for example, [4.5V-0.48V, 4.5V+0.48V]) (i.e., the first conversion voltage) through the operational amplifier 4, and then forwarded to the analog acquisition module 6 through the internal bus 5 for acquisition to obtain the first acquisition voltage value; at the same time, the second isolated DC / DC power supply module 2 performs secondary power conversion to convert the first power supply voltage into a second power supply voltage. On the one hand, the second power supply voltage is directly forwarded to the peripheral device to provide OUT2 for the peripheral device, and on the other hand, the operational amplifier 4 converts the first power supply voltage into a voltage within a first voltage range (for example, [4.5V-0.48V, 4.5V+0.48V]) (i.e., the first conversion voltage). After the amplifier 4 converts the second supply voltage into a voltage within a second voltage range (for example, [3.5V-0.48V, 3.5V+0.48V]) (i.e., a second converted voltage), it is forwarded to the analog acquisition module 6 via the internal bus for acquisition to obtain a second acquired voltage value; a third isolated DC / DC power supply module 3 is selected to convert the output voltage into a third supply voltage. On the one hand, the third supply voltage is directly forwarded to the peripheral device to provide OUT3 for the peripheral device; on the other hand, the third supply voltage is converted into a voltage within a third voltage range (for example, [4.5V-0.48V, 4.5V+0.48V]) (i.e., a third converted voltage) by the operational amplifier 4, and then forwarded to the analog acquisition module 6 via the internal bus 5 for acquisition to obtain a third acquired voltage value.

[0051] Furthermore, the analog quantity acquisition module 6 sends the first collected voltage value, the second collected voltage value, and the third collected voltage value to the monitoring device, which determines the stability of the power supply voltage based on the first converted voltage, the second converted voltage, and the third converted voltage, as well as the first collected voltage value, the second collected voltage value, and the second collected voltage value. When the first collected voltage value is within a first voltage range (e.g., [4.5V-0.48V, 4.5V+0.48V]), the power supply voltage output corresponding to the first isolated DC / DC power supply module 1 is stable. When the first collected voltage value is outside the first voltage range, the power supply voltage output corresponding to the first isolated DC / DC power supply module 1 is unstable. When the second collected voltage value is within a second voltage range (e.g., [3.5V-0.48V, 3.5V+0.48V]), the power supply voltage output corresponding to the second isolated DC / DC power supply module 2 is stable. When the second collected voltage value is outside the second voltage range, the power supply voltage output corresponding to the second isolated DC / DC power supply module 2 is unstable. When the third collected voltage value is within the third voltage range (for example: [4.5V-0.48V, 4.5V+0.48V]), the supply voltage output corresponding to the third isolated DC / DC power supply module 3 is stable; when the third collected voltage value is outside the third voltage range, the supply voltage output corresponding to the third isolated DC / DC power supply module 3 is unstable.

[0052] The beneficial effects achieved by this application are as follows:

[0053] (1) The self-collecting output voltage circuit of the present application adopts a single-machine internal bus to transmit the converted voltage to the analog acquisition module, which can simply and conveniently collect the voltage of the secondary power supply bus through the internal bus without the need to design an external acquisition cable separately, effectively reducing the problem of low acquisition accuracy caused by cable voltage drop and improving the acquisition accuracy; at the same time, it can also simplify the cable network design and reduce the complexity of the cable network design.

[0054] (2) The self-recovery output voltage circuit of the present application adopts an isolated DC / DC power supply module (i.e., a first isolated DC / DC power supply module, a second isolated DC / DC power supply module, and a third isolated DC / DC power supply module), which can physically isolate the input voltage from the output voltage.

[0055] (3) The self-recovery output voltage circuit of the present application adopts multiple isolated DC / DC power supply modules (i.e., a first isolated DC / DC power supply module, a second isolated DC / DC power supply module, and a third isolated DC / DC power supply module), which can provide different power supply voltages (e.g., a first power supply voltage, a second power supply voltage, and a third power supply voltage) for external devices (i.e., peripheral devices).

[0056] (4) The self-collecting output voltage circuit of the present application converts the output voltage into a voltage value within the acquisition range of the analog acquisition module through an operational amplifier, thereby ensuring that the analog acquisition module can collect data normally.

[0057] Although preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the underlying inventive concepts. Therefore, the scope of protection of this application is intended to include the preferred embodiments and all changes and modifications that fall within the scope of this application. Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if such changes and modifications of this application fall within the scope of protection of this application and its equivalents, then this application is intended to include such changes and modifications.

Claims

1. A self-recovery output voltage circuit, characterized in that: At least includes: a first isolated DC / DC power supply module, a second isolated DC / DC power supply module, a third isolated DC / DC power supply module, an operational amplifier, an internal bus and an analog acquisition module; The first isolated DC / DC power supply module is connected to the peripheral device and provides the peripheral device with a first power supply voltage obtained by converting the input voltage; The first isolated DC / DC power supply module is connected to the operational amplifier to provide a first power supply voltage for the operational amplifier; The first isolated DC / DC power supply module is connected to the second isolated DC / DC power supply module to provide a first supply voltage for the second isolated DC / DC power supply module; The second isolated DC / DC power supply module is connected to the peripheral device and provides the peripheral device with a second power supply voltage obtained by converting the first power supply voltage; The second isolated DC / DC power supply module is connected to the operational amplifier and provides the operational amplifier with a second power supply voltage obtained by converting the first power supply voltage; The third isolated DC / DC power supply module is connected to the peripheral device and provides the peripheral device with a third power supply voltage obtained by converting the output voltage; A third isolated DC / DC power supply module is connected to the operational amplifier to provide a third power supply voltage for the operational amplifier; The operational amplifier is connected to the internal bus and provides the internal bus with a first conversion voltage obtained by converting the first power supply voltage, a second conversion voltage obtained by converting the second power supply voltage, and a third conversion voltage obtained by converting the third power supply voltage; The internal bus is connected to the analog quantity acquisition module, and the internal bus forwards the first conversion voltage, the second conversion voltage and the third conversion voltage to the analog quantity acquisition module. The analog quantity acquisition module collects voltage signals of the first conversion voltage, the second conversion voltage and the third conversion voltage to obtain a first collected voltage value, a second collected voltage value and a third collected voltage value.

2. The self-recovery output voltage circuit according to claim 1, characterized in that: The first supply voltage, the second supply voltage and the third supply voltage are all different.

3. The self-recovery output voltage circuit according to claim 1, characterized in that: The internal bus is a 68-core rectangular connector.

4. The self-recovery output voltage circuit according to claim 1, characterized in that: The first isolated DC / DC power supply module has a positive input terminal, a negative input terminal, a first positive polarity terminal, a second positive polarity terminal and a third positive polarity terminal; Wherein, the positive input terminal of the first isolated DC / DC power supply module is connected to the positive terminal of the input voltage; The negative input terminal of the first isolated DC / DC power supply module is connected to the negative terminal of the input voltage; A first positive polarity terminal of the first isolated DC / DC power supply module is connected to a peripheral device; The second positive polarity terminal of the first isolated DC / DC power supply module is connected to the first non-inverting input terminal of the operational amplifier; The third positive polarity terminal of the first isolated DC / DC power supply module is connected to the second isolated DC / DC power supply module.

5. The self-recovery output voltage circuit according to claim 4, characterized in that: The second isolated DC / DC power supply module has a positive input terminal, a negative input terminal, a first positive polarity terminal, a second positive polarity terminal and a third positive polarity terminal; Wherein, the positive input terminal and the negative input terminal of the second isolated DC / DC power supply module are both connected to the third positive polarity terminal of the first isolated DC / DC power supply module; A first positive polarity terminal of the second isolated DC / DC power supply module is connected to the peripheral device; The second positive polarity terminal of the second isolated DC / DC power supply module is connected to the second non-inverting input terminal of the operational amplifier.

6. The self-recovery output voltage circuit according to claim 5, characterized in that: The third isolated DC / DC power supply module has a positive input terminal, a negative input terminal, a first positive polarity terminal, a second positive polarity terminal and a third positive polarity terminal; Wherein, the positive input terminal of the third isolated DC / DC power supply module is connected to the positive terminal of the output voltage; The negative input terminal of the third isolated DC / DC power supply module is connected to the negative terminal of the output voltage; A first positive polarity terminal of the third isolated DC / DC power supply module is connected to the peripheral device; The second positive polarity terminal of the third isolated DC / DC power supply module is connected to the third non-inverting input terminal of the operational amplifier.

7. The self-recovery output voltage circuit according to claim 1, characterized in that: The first conversion voltage is within a first voltage range.

8. The self-recovery output voltage circuit according to claim 7, characterized in that: The second conversion voltage is within a second voltage range.

9. The self-recovery output voltage circuit according to claim 8, characterized in that: The third conversion voltage is within a third voltage range.

10. The self-recovery output voltage circuit according to claim 9, characterized in that: The analog quantity acquisition module sends the first acquired voltage value, the second acquired voltage value, and the third acquired voltage value to the monitoring device, and the monitoring device judges the stability of the power supply voltage through the first converted voltage, the second converted voltage, and the third converted voltage, as well as the first acquired voltage value, the second acquired voltage value, and the third acquired voltage value. When the first acquired voltage value is within the first voltage range, the power supply voltage output corresponding to the first isolated DC / DC power supply module is stable; when the first acquired voltage value is outside the first voltage range, the power supply voltage output corresponding to the first isolated DC / DC power supply module is unstable. When the second collected voltage value is within the second voltage range, the supply voltage output corresponding to the second isolated DC / DC power supply module is stable; when the second collected voltage value is outside the second voltage range, the supply voltage output corresponding to the second isolated DC / DC power supply module is unstable; When the third collected voltage value is within the third voltage range, the supply voltage output corresponding to the third isolated DC / DC power supply module is stable; when the third collected voltage value is outside the third voltage range, the supply voltage output corresponding to the third isolated DC / DC power supply module is unstable.

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