Output voltage conversion and regulation control device based on series-connected multi-stage gain modules

Abstract

The present invention discloses an output voltage conversion and regulation control device based on a series multi-stage gain module, comprising a control module, a sampling module and a series multi-stage gain module, wherein the input end of the multi-stage gain module is configured as an input voltage, the output end thereof is configured as an output voltage, the sampling module is configured to sample the output voltage and send the sampling result to the control module; the multi-stage gain module comprises a plurality of series-connected gain units, each of which has a switchable first gain coefficient and a second gain coefficient; by pre-initializing parameters, the second gain coefficient and the voltage adjustment threshold range are determined, once the voltage sampling value is judged to be lower than the minimum value of the voltage adjustment threshold range, the control module controls the multi-stage gain module to increase a first-stage gain; and once the voltage sampling value is judged to be higher than the maximum value of the voltage adjustment threshold range, the control module controls to reduce a first-stage gain. The present invention effectively avoids the oscillation phenomenon caused by gain adjustment.

Description

Technical Field

[0001] The invention relates to the field of automatic gain control, and in particular to an output voltage conversion regulating control device based on a series-connected multi-stage gain module. Background Art

[0002] Automatic gain control (AGC) refers to an automatic control method that automatically adjusts the gain of an amplifier circuit according to the signal strength. In the process of rapid development of the Internet of Things, a large number of sensors need to achieve high sensitivity, wide dynamic range, low cost, low power consumption and other requirements. Usually, wide voltage power supply and dedicated programmable amplifiers are used to achieve these requirements, but wide voltage will lead to a significant increase in power consumption. Secondly, the cost of dedicated programmable amplifiers is generally not low, and their amplification factor is usually a fixed value, which cannot fully meet the effectiveness of the output signal range when performing automatic gain control.

[0003] By adopting a series-connected multi-stage unit gain control circuit, the unit gain magnification can be freely defined, so the logic processing of the automatic gain control becomes simpler, and the closed loop of the automatic gain control can be completed by calling the same decision algorithm. This can also be used for low-performance main controllers, further lowering the application threshold of this technology. Summary of the invention

[0004] In order to solve the problems of the prior art, the present invention provides an output voltage conversion and regulation control device based on a series-type multi-stage gain module, and the technical solution is as follows:

[0005] The present invention provides two output voltage conversion and regulation control devices based on series-connected multi-stage gain modules:

[0006] The first output voltage conversion and regulation control device comprises a control module, a sampling module and a series-connected multi-stage gain module, wherein the input end of the series-connected multi-stage gain module is configured to input a first voltage, and the output end thereof is configured to output a second voltage, wherein the second voltage value is higher than the first voltage value, and the sampling module is configured to sample the second voltage and send the sampling result to the control module;

[0007] The output voltage conversion regulation control device is configured to determine a target voltage signal range according to a preset voltage signal sampling range, including: a maximum value of the target voltage signal range is less than a maximum value of the voltage signal sampling range, and a minimum value of the target voltage signal range is greater than a minimum value of the voltage signal sampling range;

[0008] The series multi-stage gain module includes a plurality of gain units connected in series, each gain unit having at least a switchable first gain coefficient and a second gain coefficient, wherein the first gain coefficient is 1, the value of the second gain coefficient is set to be less than the quotient of the maximum value of the target voltage signal range and the minimum value of the target voltage signal range, and the second gain coefficient is greater than 1, and under the control of the control module, each gain unit can independently switch between the first gain coefficient and the second gain coefficient;

[0009] The output voltage conversion regulation control device is further configured to determine a voltage adjustment threshold range according to the target voltage signal range and the value of the second gain coefficient, including: a maximum value of the voltage adjustment threshold range is less than a maximum value of the target voltage signal range, a minimum value of the voltage adjustment threshold range is greater than a minimum value of the target voltage signal range, and a quotient of a maximum value of the voltage adjustment threshold range and a minimum value of the voltage adjustment threshold range is less than or equal to the second gain coefficient;

[0010] The control module is configured to receive the second voltage sampling value obtained by real-time sampling of the sampling module, and perform the following steps to control the second voltage to be within a target voltage signal range:

[0011] Once it is determined that the second voltage sampling value is lower than the minimum value of the voltage adjustment threshold range, controlling to add a gain unit to switch from the first gain coefficient to the second gain coefficient; and

[0012] Once it is determined that the second voltage sampling value is higher than the maximum value of the voltage adjustment threshold range, a gain unit is added to switch from the second gain coefficient to the first gain coefficient.

[0013] Furthermore, the second gain coefficients of the multiple gain units are the same.

[0014] Furthermore, each gain unit has a control port electrically connected to the output end of the control module. If the control port receives a low level, the corresponding gain unit switches to the first gain coefficient; if the control port receives a high level, the corresponding gain unit switches to the second gain coefficient.

[0015] Furthermore, the preset voltage signal sampling range is a voltage range that can be sampled by the sampling module at the output end of the series-connected multi-stage gain module.

[0016] Furthermore, the target voltage signal range is determined according to the preset voltage signal sampling range in combination with the system characteristics of the output voltage conversion and regulation control device, wherein the system characteristics include input and output voltage linearity and / or withstand voltage limit.

[0017] Furthermore, the system characteristic is input-output voltage linearity, and the input-output voltage linearity is obtained by:

[0018] Under the premise that all gain units are switched to the first gain coefficient, a plurality of groups of input voltages and corresponding output voltages are tested respectively;

[0019] Through a linear fitting algorithm, a linear function relationship of the output voltage with respect to the input voltage is obtained, and then the input-output voltage linearity α is obtained. The input-output voltage linearity α is less than 1.

[0020] Furthermore, the target voltage signal range is obtained by:

[0021] If the voltage signal sampling range is [A, B],

[0022] Then the target voltage signal range is

[0023] Furthermore, the system characteristic is a withstand voltage limit, and the target voltage signal range is obtained by:

[0024] If the voltage signal sampling range is [A, B], the withstand voltage limit is V bear , V bear <B,

[0025] Then the target voltage signal range is [A+2(BV bear ),B-2(BV bear )].

[0026] Further, the quotient of the maximum value of the voltage adjustment threshold range and the minimum value of the voltage adjustment threshold range is equal to the second gain coefficient, and the difference between the maximum value of the target voltage signal range and the maximum value of the voltage adjustment threshold range is equal to the difference between the minimum value of the voltage adjustment threshold range and the minimum value of the target voltage signal range.

[0027] The second output voltage conversion and regulation control device comprises a control module, a sampling module and a series-type multi-stage gain module, wherein the input end of the series-type multi-stage gain module is configured to input a third voltage, and the output end thereof is configured to output a fourth voltage, wherein the fourth voltage value is lower than the third voltage value, and the sampling module is configured to sample the fourth voltage and send the sampling result to the control module;

[0028] The output voltage conversion regulation control device is configured to determine a target voltage signal range according to a preset voltage signal sampling range, including: a maximum value of the target voltage signal range is less than a maximum value of the voltage signal sampling range, and a minimum value of the target voltage signal range is greater than a minimum value of the voltage signal sampling range;

[0029] The series multi-stage gain module includes a plurality of gain units connected in series, each gain unit having at least a switchable first gain coefficient and a second gain coefficient, wherein the first gain coefficient is 1, the value of the second gain coefficient is set to be smaller than the quotient of the maximum value of the target voltage signal range and the minimum value of the target voltage signal range, and the second gain coefficient is smaller than 1, and under the control of the control module, each gain unit can independently switch between the first gain coefficient and the second gain coefficient;

[0030] The output voltage conversion regulation control device is further configured to determine a voltage adjustment threshold range according to the target voltage signal range and the value of the second gain coefficient, including: a maximum value of the voltage adjustment threshold range is less than a maximum value of the target voltage signal range, a minimum value of the voltage adjustment threshold range is greater than a minimum value of the target voltage signal range, and a quotient of a maximum value of the voltage adjustment threshold range and a minimum value of the voltage adjustment threshold range is less than or equal to the second gain coefficient;

[0031] The control module is configured to receive the fourth voltage sampling value obtained by real-time sampling of the sampling module, and perform the following steps to control the fourth voltage to be within the target voltage signal range:

[0032] Once it is determined that the fourth voltage sampling value is lower than the minimum value of the voltage adjustment threshold range, controlling to add a gain unit to switch from the second gain coefficient to the first gain coefficient; and

[0033] Once it is determined that the fourth voltage sampling value is higher than the maximum value of the voltage adjustment threshold range, a gain unit is controlled to be added to switch from the first gain coefficient to the second gain coefficient.

[0034] Furthermore, the second gain coefficients of the multiple gain units are the same.

[0035] Furthermore, each gain unit has a control port electrically connected to the output end of the control module. If the control port receives a low level, the corresponding gain unit switches to the first gain coefficient; if the control port receives a high level, the corresponding gain unit switches to the second gain coefficient.

[0036] Furthermore, the preset voltage signal sampling range is a voltage range that can be sampled by the sampling module at the output end of the series-connected multi-stage gain module.

[0037] Furthermore, the target voltage signal range is determined according to the preset voltage signal sampling range in combination with the system characteristics of the output voltage conversion and regulation control device, wherein the system characteristics include input and output voltage linearity and / or withstand voltage limit.

[0038] Furthermore, the system characteristic is input-output voltage linearity, and the input-output voltage linearity is obtained by:

[0039] Under the premise that all gain units are switched to the first gain coefficient, a plurality of groups of input voltages and corresponding output voltages are tested respectively;

[0040] Through a linear fitting algorithm, a linear function relationship of the output voltage with respect to the input voltage is obtained, and then the input-output voltage linearity α is obtained. The input-output voltage linearity α is less than 1.

[0041] Furthermore, the target voltage signal range is obtained by:

[0042] If the voltage signal sampling range is [A, B],

[0043] Then the target voltage signal range is

[0044] Furthermore, the system characteristic is a withstand voltage limit, and the target voltage signal range is obtained by:

[0045] If the voltage signal sampling range is [A, B], the withstand voltage limit is V bear , V bear <B,

[0046] Then the target voltage signal range is [A+2(BV bear ),B-2(BV bear )].

[0047] Further, the quotient of the maximum value of the voltage adjustment threshold range and the minimum value of the voltage adjustment threshold range is equal to the second gain coefficient, and the difference between the maximum value of the target voltage signal range and the maximum value of the voltage adjustment threshold range is equal to the difference between the minimum value of the voltage adjustment threshold range and the minimum value of the target voltage signal range.

[0048] The technical solution provided by the present invention has the following beneficial effects: by obtaining a suitable signal strength determination threshold through initialization parameters, the oscillation phenomenon caused by gain adjustment can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] 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 be obtained based on these drawings without paying creative work.

[0050] Figure 1 A schematic diagram of input and output connections of a series-type multi-stage gain module provided for an exemplary embodiment of the present disclosure;

[0051] Figure 2 A schematic diagram of an operation flow of initializing parameters provided for an exemplary embodiment of the present disclosure;

[0052] Figure 3 A schematic diagram of an output voltage conversion and regulation control flow chart provided for an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0055] In one embodiment of the present invention, an output voltage conversion and regulation control device based on a series-connected multi-stage gain module is provided, comprising a control module, a sampling module and a series-connected multi-stage gain module, such as Figure 1 As shown, the input end of the series-connected multi-stage gain module is configured to input a first voltage, and the output end thereof is configured to output a second voltage, and the sampling module is configured to sample the second voltage and send the sampling result to the control module, wherein the second voltage value is higher than the first voltage value, that is, the series-connected multi-stage gain module in this embodiment is used for boosting;

[0056] The series multi-stage gain module includes a plurality of gain units connected in series, each gain unit having at least a switchable first gain coefficient and a second gain coefficient. Under the control of the control module, each gain unit can independently and asynchronously switch between the first gain coefficient and the second gain coefficient, that is, the control module can control the single gain unit to switch the gain coefficient one by one in stages, wherein the first gain coefficient is 1, and since the second voltage value is higher than the first voltage value, the second gain coefficient is greater than 1; each gain unit has a control port electrically connected to the output end of the control module, and if the control port receives a low level, the corresponding gain unit switches to the first gain coefficient; if the control port receives a high level, the corresponding gain unit switches to the second gain coefficient.

[0057] First, the output voltage conversion regulation control device needs to perform parameter initialization operations, see Figure 2 , including determining the voltage signal sampling range, determining the target voltage signal range (as the effective signal range), determining the second gain coefficient, and determining the voltage adjustment threshold range (the upper limit of which is the high adjustment threshold and the lower limit of which is the low adjustment threshold).

[0058] The preset voltage signal sampling range is the voltage range that can be sampled by the sampling module at the output end of the series-connected multi-stage gain module, that is, the sampling full-scale range, and its value can be measured through experiments.

[0059] According to the preset voltage signal sampling range, the target voltage signal range can be determined. The basic principle is: the maximum value of the target voltage signal range is less than the maximum value of the voltage signal sampling range, and the minimum value of the target voltage signal range is greater than the minimum value of the voltage signal sampling range. Specifically, the target voltage signal range is determined in combination with the system characteristics of the output voltage conversion and regulation control device, wherein the system characteristics include input and output voltage linearity and / or withstand voltage limit. The following are explained one by one:

[0060] Case 1: The system characteristic is input-output voltage linearity, and the input-output voltage linearity is obtained by:

[0061] Under the premise that all gain units are switched to the first gain coefficient, multiple groups of input voltages and corresponding output voltages are tested respectively; a linear function relationship of the output voltage with respect to the input voltage is obtained through a linear fitting algorithm, and then the input-output voltage linearity α is obtained. Since there must be loss in the output voltage, the input-output voltage linearity α is less than 1.

[0062] The target voltage signal range is the size interval of the sampling full scale multiplied by the linearity α within the target voltage signal range. In a preferred embodiment, the target voltage signal range is obtained by:

[0063] If the voltage signal sampling range is [A, B],

[0064] Then the target voltage signal range is

[0065] Case 2: The system characteristic is a withstand voltage limit, and the target voltage signal range is obtained by:

[0066] If the voltage signal sampling range is [A, B], the withstand voltage limit is V bear , V bear <B,

[0067] Then the target voltage signal range is [A+2(BV bear ),B-2(BV bear )].

[0068] Case 3: The system characteristics are input and output voltage linearity and withstand voltage limit. According to the target voltage signal range obtained in the above two cases, the larger value of the lower limit and the smaller value of the upper limit are taken, that is, Among them, max() is the maximum function, and min() is the minimum function.

[0069] After determining the upper and lower limits of the target voltage signal range, the value of the second gain coefficient of the gain unit can be set to be less than the quotient of the maximum value (upper limit) of the target voltage signal range and the minimum value (lower limit) of the target voltage signal range. For example, the sampling full scale is 0-10V, and the target voltage signal range is determined to be 1.5-8.2V by any of the above situations. Therefore, the second gain coefficient is less than (8.2 / 1.5), and the second gain coefficient can be taken as 5 (not limited to an integer, this is just an example).

[0070] The principle for determining the voltage adjustment threshold range is as follows: the maximum value of the voltage adjustment threshold range is less than the maximum value of the target voltage signal range, the minimum value of the voltage adjustment threshold range is greater than the minimum value of the target voltage signal range, and the quotient of the maximum value of the voltage adjustment threshold range and the minimum value of the voltage adjustment threshold range is less than or equal to the second gain coefficient; taking the second gain coefficient as an example, the voltage adjustment threshold range can be determined as 1.6-8V, or 1.55-7.75V. In one embodiment of the present invention, it also satisfies the requirement that the difference between the maximum value of the target voltage signal range and the maximum value of the voltage adjustment threshold range is equal to the difference between the minimum value of the voltage adjustment threshold range and the minimum value of the target voltage signal range.

[0071] After completing the initialization parameter operation, see Figure 3 , the control module is configured to receive the second voltage sampling value obtained by real-time sampling of the sampling module, and perform the following steps to control the second voltage to be within the target voltage signal range:

[0072] Once it is determined that the second voltage sampling value is lower than the minimum value of the voltage adjustment threshold range (satisfies the low sampling signal determination), a gain unit is controlled to switch from the first gain coefficient to the second gain coefficient; and

[0073] Once it is determined that the second voltage sampling value is higher than the maximum value of the voltage adjustment threshold range (satisfying the high judgment of the sampling signal), a gain unit is controlled to switch from the second gain coefficient to the first gain coefficient; and

[0074] The second gain coefficients of the plurality of gain units are the same.

[0075] In summary, the output voltage conversion and regulation control device of this embodiment regulates and controls the output voltage as follows: Figure 2 and Figure 3 As shown:

[0076] S1, initialization parameters, which specifically include: S11, determining the voltage signal sampling range, S12, determining the target voltage signal range, that is, the effective signal range, S13, determining the second gain multiple of the gain unit, S14 and S15, respectively determining the high adjustment threshold and the low adjustment threshold, that is, the upper limit and lower limit of the voltage adjustment threshold range.

[0077] S2, collecting signals, using a sampling module to sample a second voltage at the output end of the series multi-stage gain module. This step is a process of converting an analog signal into a digital signal.

[0078] S3, judging whether the voltage signal strength obtained by the acquisition is low, if the signal strength is less than the low adjustment threshold (the lower limit of the voltage adjustment threshold range), increasing the gain by one level (S4, controlling to increase a gain unit to switch from the first gain coefficient to the second gain coefficient), and returning to step S2; if the signal strength is not less than the low adjustment threshold, executing step S5;

[0079] S5. Perform a high signal strength judgment on the collected voltage signal strength. If the signal strength is greater than the high adjustment threshold (the upper limit of the voltage adjustment threshold range), reduce the gain by one level (S6. Control to add a gain unit to switch from the second gain coefficient to the first gain coefficient), and return to step S2; if the signal strength is not greater than the high adjustment threshold, return to step S2.

[0080] The series-connected multi-stage gain module in the above embodiment is used for boosting, that is, making the output voltage greater than the input voltage. In another embodiment of the present invention, the series-connected multi-stage gain module can also be used for bucking, that is, making the output voltage less than the input voltage. In this embodiment, the output voltage conversion and regulation control device also includes a control module, a sampling module and a series-connected multi-stage gain module, wherein the input end of the series-connected multi-stage gain module is configured to input a third voltage, and the output end thereof is configured to output a fourth voltage, wherein the fourth voltage value is lower than the third voltage value, and the sampling module is configured to sample the fourth voltage and send the sampling result to the control module;

[0081] The steps of initializing parameters specifically include: S11, determining the voltage signal sampling range, S12, determining the target voltage signal range, that is, the effective signal range, S13, determining the second gain multiple of the gain unit, S14 and S15, respectively determining the high adjustment threshold and the low adjustment threshold, that is, the upper limit and lower limit of the voltage adjustment threshold range. The same as the previous embodiment, the record of the initialization parameters in the previous embodiment is incorporated into this embodiment by reference.

[0082] Different from the above embodiment, the first gain coefficient of the gain unit is 1, and the second gain coefficient is less than 1; after completing the initialization parameters, the control module receives the fourth voltage sampling value obtained by real-time sampling of the sampling module, and performs the following steps to control the fourth voltage to be within the target voltage signal range:

[0083] Once it is determined that the fourth voltage sampling value is lower than the minimum value of the voltage adjustment threshold range, a gain unit is added to switch from the second gain coefficient to the first gain coefficient. Since the second gain coefficient is less than 1, the fourth voltage sampling value can be adjusted to increase so that it is within the voltage adjustment threshold range; and

[0084] On the contrary, once it is determined that the fourth voltage sampling value is higher than the maximum value of the voltage adjustment threshold range, a gain unit is controlled to be added to switch from the first gain coefficient to the second gain coefficient.

[0085] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0086] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An output voltage conversion and regulation control device based on a series-connected multi-stage gain module, characterized in that: It includes a control module, a sampling module and a series-type multi-stage gain module, wherein the input end of the series-type multi-stage gain module is configured to input a first voltage, and the output end thereof is configured to output a second voltage, wherein the second voltage is higher than the first voltage, and the sampling module is configured to sample the second voltage and send the sampling result to the control module; The output voltage conversion regulation control device is configured to determine a target voltage signal range according to a preset voltage signal sampling range, including: a maximum value of the target voltage signal range is less than a maximum value of the voltage signal sampling range, and a minimum value of the target voltage signal range is greater than a minimum value of the voltage signal sampling range; The series multi-stage gain module includes a plurality of gain units connected in series, each gain unit having at least a switchable first gain coefficient and a second gain coefficient, wherein the first gain coefficient is 1, the value of the second gain coefficient is set to be less than the quotient of the maximum value of the target voltage signal range and the minimum value of the target voltage signal range, and the second gain coefficient is greater than 1, and under the control of the control module, each gain unit can independently switch between the first gain coefficient and the second gain coefficient; The output voltage conversion regulation control device is further configured to determine a voltage adjustment threshold range according to the target voltage signal range and the value of the second gain coefficient, including: a maximum value of the voltage adjustment threshold range is less than a maximum value of the target voltage signal range, a minimum value of the voltage adjustment threshold range is greater than a minimum value of the target voltage signal range, and a quotient of a maximum value of the voltage adjustment threshold range and a minimum value of the voltage adjustment threshold range is less than or equal to the second gain coefficient; The control module is configured to receive the second voltage sampling value obtained by real-time sampling of the sampling module, and perform the following steps to control the second voltage to be within a target voltage signal range: Once it is determined that the second voltage sampling value is lower than the minimum value of the voltage adjustment threshold range, controlling to add a gain unit to switch from the first gain coefficient to the second gain coefficient; and Once it is determined that the second voltage sampling value is higher than the maximum value of the voltage adjustment threshold range, a gain unit is added to switch from the second gain coefficient to the first gain coefficient.

2. An output voltage conversion and regulation control device based on a series-connected multi-stage gain module, characterized in that: The invention comprises a control module, a sampling module and a series-type multi-stage gain module, wherein the input end of the series-type multi-stage gain module is configured to input a third voltage, and the output end thereof is configured to output a fourth voltage, wherein the fourth voltage is lower than the third voltage, and the sampling module is configured to sample the fourth voltage and send the sampling result to the control module; The output voltage conversion regulation control device is configured to determine a target voltage signal range according to a preset voltage signal sampling range, including: a maximum value of the target voltage signal range is less than a maximum value of the voltage signal sampling range, and a minimum value of the target voltage signal range is greater than a minimum value of the voltage signal sampling range; The series multi-stage gain module includes a plurality of gain units connected in series, each gain unit having at least a switchable first gain coefficient and a second gain coefficient, wherein the first gain coefficient is 1, the value of the second gain coefficient is set to be smaller than the quotient of the maximum value of the target voltage signal range and the minimum value of the target voltage signal range, and the second gain coefficient is smaller than 1, and under the control of the control module, each gain unit can independently switch between the first gain coefficient and the second gain coefficient; The output voltage conversion regulation control device is further configured to determine a voltage adjustment threshold range according to the target voltage signal range and the value of the second gain coefficient, including: a maximum value of the voltage adjustment threshold range is less than a maximum value of the target voltage signal range, a minimum value of the voltage adjustment threshold range is greater than a minimum value of the target voltage signal range, and a quotient of a maximum value of the voltage adjustment threshold range and a minimum value of the voltage adjustment threshold range is less than or equal to the second gain coefficient; The control module is configured to receive the fourth voltage sampling value obtained by real-time sampling of the sampling module, and perform the following steps to control the fourth voltage to be within the target voltage signal range: Once it is determined that the fourth voltage sampling value is lower than the minimum value of the voltage adjustment threshold range, controlling to add a gain unit to switch from the second gain coefficient to the first gain coefficient; and Once it is determined that the fourth voltage sampling value is higher than the maximum value of the voltage adjustment threshold range, a gain unit is controlled to be added to switch from the first gain coefficient to the second gain coefficient.

3. The output voltage conversion and regulation control device according to claim 1 or 2, characterized in that: The second gain coefficients of the plurality of gain units are the same.

4. The output voltage conversion and regulation control device according to claim 1 or 2, characterized in that: Each gain unit has a control port electrically connected to the output end of the control module. If the control port receives a low level, the corresponding gain unit switches to a first gain coefficient; if the control port receives a high level, the corresponding gain unit switches to a second gain coefficient.

5. The output voltage conversion and regulation control device according to claim 1 or 2, characterized in that: The preset voltage signal sampling range is the voltage range that can be sampled by the sampling module at the output end of the series-connected multi-stage gain module.

6. The output voltage conversion and regulation control device according to claim 5, characterized in that: The target voltage signal range is determined according to the preset voltage signal sampling range and in combination with the system characteristics of the output voltage conversion and regulation control device, wherein the system characteristics include input and output voltage linearity and / or withstand voltage limit.

7. The output voltage conversion and regulation control device according to claim 6, characterized in that: The system characteristic is input-output voltage linearity, and the input-output voltage linearity is obtained by: Under the premise that all gain units are switched to the first gain coefficient, a plurality of groups of input voltages and corresponding output voltages are tested respectively; Through a linear fitting algorithm, a linear function relationship of the output voltage with respect to the input voltage is obtained, and then the input-output voltage linearity α is obtained. The input-output voltage linearity α is less than 1.

8. The output voltage conversion and regulation control device according to claim 7, characterized in that: The target voltage signal range is obtained by: If the voltage range that the sampling module can sample at the output end of the series multi-stage gain module is [A, B], Then the target voltage signal range is 9. The output voltage conversion and regulation control device according to claim 6, characterized in that: The system characteristic is a withstand voltage limit, and the target voltage signal range is obtained by: If the voltage range that the sampling module can sample at the output end of the series multi-stage gain module is [A, B], the withstand voltage limit is V bear , V bear <B, Then the target voltage signal range is [A+2(BV bear ), B-2(BV bear )].

10. The output voltage conversion and regulation control device according to claim 1 or 2, characterized in that: The quotient of the maximum value of the voltage adjustment threshold range and the minimum value of the voltage adjustment threshold range is equal to the second gain coefficient, and the difference between the maximum value of the target voltage signal range and the maximum value of the voltage adjustment threshold range is equal to the difference between the minimum value of the voltage adjustment threshold range and the minimum value of the target voltage signal range.

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