Self-recovery output voltage circuit

Abstract

The invention discloses a self-recovery output voltage circuit, which relates to the technical field of spaceflight and at least comprises a first isolation direct current / direct current power supply module, a second isolation direct current / direct current power supply module, a third isolation direct current / direct current power supply module, an operational amplifier, an internal bus and an analog quantity acquisition module. The voltage of the secondary power supply bus is collected in a flexible and simple mode, the problem that the collection accuracy is reduced due to cable voltage drop is solved, meanwhile, the design difficulty of the rocket cable network is lowered, and simplified design of the rocket cable network is facilitated.

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 developed rapidly, and there are many types of rockets both at home and abroad. In the entire rocket system, the onboard power supply of the avionics system is crucial, so an accurate and reliable way to collect and monitor the output voltage is needed. Generally, the voltage signals of the primary power supply bus and the secondary power supply bus on the rocket are monitored through the measurement system.

[0003] At present, the voltage signal of the power supply bus is usually collected by means of an external cable network. After the output voltage is introduced into the collection stand-alone device through the cable network, the collection stand-alone device then sends the collected voltage value to the monitoring device.

[0004] However, there are the following problems in collecting the voltage signal of the power supply bus by using an external cable network:

[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 arrow cable network to have complex technology and high cost. 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 due to 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 quantity 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 after 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 after 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 after converting the first power supply voltage, a second conversion voltage obtained after converting the second power supply voltage, and a third conversion voltage obtained after 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, and the analog quantity 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, wherein the first supply voltage, the second supply voltage and the third supply voltage are all different.

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

[0011] As above, wherein 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; the 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 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 in-phase 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 a second voltage range.

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

[0017] As above, the analog quantity acquisition module sends the first acquisition voltage value, the second acquisition voltage value and the third acquisition 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 acquisition voltage value, the second acquisition voltage value and the second acquisition voltage value. When the first acquisition 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, and when the first acquisition 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 acquisition 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, and when the second acquisition 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 acquisition 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, and when the third acquisition 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 quantity acquisition module, and can simply and conveniently collect the voltage of the secondary power supply bus through the internal bus without the need to separately design an external acquisition cable, thereby 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 quantity acquisition module through an operational amplifier, thereby ensuring that the analog quantity 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 The figure 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 drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. 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 quantity 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 a 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 a 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 a 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 the peripheral device, and provides the peripheral device with a third power supply voltage (OUT3) obtained after converting the output voltage; the third isolated DC / DC power supply module 3 is connected to the operational amplifier 4, and provides the operational amplifier 4 with a third power supply voltage (OUT3). The operational amplifier 4 is connected to the internal bus 5, and provides the internal bus 5 with a first conversion voltage obtained after converting the first power supply voltage (OUT1), a second conversion voltage obtained after converting the second power supply voltage (OUT2), and a third conversion voltage obtained after converting the third power supply voltage (OUT3). The internal bus 5 is connected to the analog quantity acquisition module 6, and the internal bus 5 forwards the first conversion voltage, the second conversion voltage, and the third conversion voltage to the analog quantity acquisition module 6, and the analog quantity acquisition module 6 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.

[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 the present 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 switching connector for switching 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 is not limited to a 68-core rectangular connector, and can also be other equipment 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 can 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 power 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 set according to actual conditions. The present application preferably has the following configurations: 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 power supply voltage, the second power supply voltage and the third power 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 power supply voltage for power supply, the peripheral device connected to the second isolated DC / DC power supply module 2 selects the second power supply voltage for power supply, and the peripheral device connected to the third isolated DC / DC power supply module 3 selects the third power supply voltage for power supply.

[0040] Further, after the converted values ​​of the output voltage (i.e., the first conversion voltage, the second conversion voltage, and the third conversion voltage) are transmitted to the analog quantity acquisition module 6 through the internal bus 5, the stability of the power supply voltage is judged by the converted values ​​of the output voltage (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 output of the power supply voltage 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 output of the power supply voltage 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 output of the power supply voltage 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 output of the power supply voltage 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 output of the power supply voltage 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 output of the power supply voltage 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 terminal of the input voltage; the negative input terminal (IN-) of the first isolated DC / DC power supply module 1 is connected to the negative terminal of the input voltage; the first positive polarity terminal of the first isolated DC / DC power supply module 1 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 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, and the present application preferably provides that: the first conversion voltage is within a first voltage range.

[0045] Furthermore, the specific value of the first voltage range is set according to actual conditions. The present application preferably has the first voltage range of [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. The present application preferably provides that the second voltage range is [3.5V-0.48V, 3.5V+0.48V], but is not limited to [3.5V-0.48V, 3.5V+0.48V].

[0048] Furthermore, a specific value of the third conversion voltage is set according to actual conditions, and the present application preferably configures the third conversion voltage to be within a third voltage range.

[0049] Furthermore, the specific value of the third voltage range is set according to actual conditions. The present application preferably provides that the third voltage range is [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 (i.e., the first conversion voltage) within a first voltage range (for example, [4.5V-0.48V, 4.5V+0.48V]) through the operational amplifier 4, and then forwarded to the analog quantity acquisition module 6 through the internal bus 5 for acquisition to obtain the first acquired 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 (i.e., the second conversion voltage) within a second voltage range (e.g., [3.5V-0.48V, 3.5V+0.48V]), it is forwarded to the analog quantity acquisition module 6 through the internal bus for acquisition to obtain a second acquired voltage value; the 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 (i.e., the third conversion voltage) within a third voltage range (e.g., [4.5V-0.48V, 4.5V+0.48V]) through the operational amplifier 4, and then forwarded to the analog quantity acquisition module 6 through the internal bus 5 for acquisition to obtain a third acquired voltage value.

[0051] Further, the analog quantity acquisition module 6 sends the first acquisition voltage value, the second acquisition voltage value and the third acquisition 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 acquisition voltage value, the second acquisition voltage value and the second acquisition voltage value. When the first acquisition voltage value is within the first voltage range (for example: [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, and when the first acquisition 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 acquisition voltage value is within the second voltage range (for example: [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, and when the second acquisition 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 power 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 power 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 quantity acquisition module, and can simply and conveniently collect the voltage of the secondary power supply bus through the internal bus without the need to separately design an external acquisition cable, thereby 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 quantity acquisition module through an operational amplifier, thereby ensuring that the analog quantity acquisition module can collect data normally.

[0057] Although the 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 are aware of the basic creative concepts. Therefore, the scope of protection of the present application is intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application. Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the protection scope of the present application and its equivalent technology, the present application is also intended to include these modifications and variations.

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 quantity acquisition module; Wherein, the first isolated DC / DC power supply module is connected to the 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 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 to provide 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 to provide the peripheral device with a third power supply voltage obtained after 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 the first collected voltage value, the second collected voltage value and the 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-pin 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 the 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 end 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 end of the second isolated DC / DC power supply module is connected to the peripheral device; A second positive polarity terminal of the second isolated DC / DC power supply module is connected to a 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; A 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.

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 conversion voltage, the second conversion voltage and the third conversion voltage, and 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 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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