Drive circuit and vibration damping system

Abstract

The invention relates to a driving circuit and a vibration reduction system, the driving circuit comprises a plurality of driving branches, the input ends of the plurality of driving branches receive control signals respectively, the output ends of the plurality of driving branches are correspondingly connected with a plurality of target devices used for outputting force respectively, and the plurality of driving branches comprise at least one first driving branch; wherein the first driving branch is configured to control the corresponding target device to be in a first output state when the received control signal meets a first preset condition, and control the corresponding target device to be in a second output state when the received control signal meets a second preset condition; the force output by the target device in the first output state is smaller than the force output by the target device in the second output state, so that the drive circuit can independently control the output of a single motor, the drive circuit can adapt to control scenes of large-range output and high-precision output at the same time, the control performance of the drive circuit is improved, and the power consumption of the drive circuit is reduced. And the application scene of the product is widened.

Description

Technical Field

[0001] The present application relates to the technical field of motor drive control, and in particular to a drive circuit and a vibration reduction system. Background Art

[0002] With the continuous improvement of the precision of ultra-precision processing equipment and measuring instruments, the vibration of their working environment tends to be micro-amplitude and low-frequency, which puts forward more stringent requirements on the vibration reduction performance of the vibration reduction table. The traditional passive vibration isolation technology consists of mass-spring-damper. Due to the inherent contradiction between the low-frequency vibration transmission rate and the high-frequency vibration attenuation rate, it cannot meet the vibration reduction needs of ultra-precision equipment. Therefore, some new technologies and new methods are urgently needed to improve this situation.

[0003] Active vibration reduction is an important technology to solve the above problems. Active vibration reduction systems usually use motor drive, piezoelectric drive, hydraulic drive and / or pneumatic drive to provide a force opposite to the ground vibration and table vibration, thereby achieving its active vibration reduction function.

[0004] However, the above-mentioned active vibration reduction system has the problem of being difficult to balance large-range output and high-precision output, which limits its application scenarios. Summary of the invention

[0005] The purpose of the present application is to provide a drive circuit and a vibration reduction system to solve the problem that the active vibration reduction system has difficulty in taking into account both a wide range of output and a high-precision output, thereby expanding its application scenarios.

[0006] An embodiment of the present application provides a driving circuit, which includes multiple driving branches, wherein input ends of the multiple driving branches respectively receive control signals, output ends of the multiple driving branches are respectively connected to multiple target devices for outputting force, and the multiple driving branches include at least one first driving branch; wherein the first driving branch is configured to: when the received control signal meets a first preset condition, control the corresponding target device to be in a first output state, and when the received control signal meets a second preset condition, control the corresponding target device to be in a second output state; and, the force output by the target device corresponding to the first driving branch in the first output state is less than the force output by the target device in the second output state.

[0007] Among them, the multiple drive branches also include at least one second drive branch; wherein the second drive branch is configured to: in response to receiving a control signal, control the corresponding target device to be in a third output state; and the force output by the target device corresponding to the second drive branch in the third output state is greater than the force output by the target device corresponding to the first drive branch in the second output state.

[0008] When the first driving branch executes the control of the corresponding target device to be in the first output state, the first driving branch specifically executes: controlling the corresponding target device to stop outputting force, so as to realize controlling the corresponding target device to be in the first output state.

[0009] The first driving branch includes a signal conversion circuit and a first driver, wherein the signal conversion circuit receives a control signal and is connected to the first driver, and the first driver is connected to a corresponding target device; and the signal conversion circuit is configured to: when the received control signal meets a first preset condition, attenuate the control signal using a first attenuation method to obtain a first attenuated control signal, and transmit the first attenuated control signal to the first driver; when the received control signal meets a second preset condition, attenuate the control signal using a second attenuation method to obtain a second attenuated control signal, and transmit the second attenuated control signal to the first driver; the first driver is configured to: in response to receiving the first attenuated control signal, control the corresponding target device to be in a first output state, and the magnitude of the force output by the corresponding target device in the first output state is in direct proportion to the signal strength of the first attenuated control signal; in response to receiving the second attenuated control signal, control the corresponding target device to be in a second output state, and the magnitude of the force output by the corresponding target device in the second output state is in direct proportion to the signal strength of the second attenuated control signal.

[0010] Among them, the control signal is a control voltage signal; the signal conversion circuit is specifically configured as: when the received control voltage signal is greater than a preset negative voltage and less than a preset positive voltage, the control voltage signal is converted into zero voltage, and the zero voltage is transmitted to the first driver as a first attenuated control signal; when the received control voltage signal is less than or equal to a preset negative voltage or greater than or equal to a preset positive voltage, the control voltage signal is attenuated by a preset attenuation amount to obtain a second attenuated control signal, and the second attenuated control signal is transmitted to the first driver; the first driver is specifically configured as: in response to receiving zero voltage, controlling the corresponding target device to stop outputting force so as to control the corresponding target device to be in a first output state, and in response to receiving the second attenuated control signal, controlling the corresponding target device to output force according to the second attenuated control signal so as to control the corresponding target device to be in a second output state.

[0011] Among them, when the signal conversion circuit executes the attenuation of the control voltage signal by a preset attenuation amount to obtain a second attenuated control signal when the received control voltage signal is less than or equal to a preset negative voltage or greater than or equal to a preset positive voltage, and transmits the second attenuated control signal to the first driver, the specific execution is: when the received control voltage signal is less than or equal to a preset negative voltage, the preset negative voltage is subtracted from the control voltage signal to obtain a second attenuated control signal, and the second attenuated control signal is transmitted to the first driver; when the received control voltage signal is greater than or equal to a preset positive voltage, the preset positive voltage is subtracted from the control voltage signal to obtain a second attenuated control signal, and the second attenuated control signal is transmitted to the first driver.

[0012] The signal conversion circuit includes a first operator, a first comparator, a first analog switch, a second operator, a second comparator, a second analog switch and a third operator, wherein the first operator and the first comparator are both connected to the first analog switch, the second operator and the second comparator are both connected to the second analog switch, the first analog switch and the second analog switch are both connected to the third operator, and the third operator is connected to the first driver; wherein the first operator receives a control voltage signal and a preset positive voltage respectively, and is configured to: transmit the control voltage signal after subtracting the preset positive voltage to the first input end of the first analog switch; the first comparator receives the control voltage signal and the preset positive voltage respectively, and is configured to: when the control voltage signal is greater than the preset positive voltage, send a first turn-on signal to the first analog switch, and when the control voltage signal is not greater than the preset positive voltage, send a first turn-off signal to the first analog switch; the first analog switch is configured to: in response to receiving the first turn-on signal, control the conduction between the first input end of the first analog switch and the output end of the first analog switch to achieve the transmission of the control voltage signal after subtracting the preset positive voltage to the input end of the third operator, and in response to receiving the first shutdown signal, controls the first input end of the first analog switch and the output end of the first analog switch to be disconnected; the second operator receives the control voltage signal and the preset negative voltage respectively, and is configured to: transmit the control voltage signal minus the preset negative voltage to the first input end of the second analog switch; the second comparator receives the control voltage signal and the preset negative voltage respectively, and is configured to: when the control voltage signal is less than the preset negative voltage, send a second conduction signal to the second analog switch, and when the control voltage signal is not less than the preset negative voltage, send a second shutdown signal to the second analog switch; the second analog switch is configured to: in response to receiving the second conduction signal, control the first input end of the second analog switch and the output end of the second analog switch to be connected, so as to realize the transmission of the control voltage signal minus the preset negative voltage to the input end of the third operator, and in response to receiving the second shutdown signal, control the first input end of the second analog switch and the output end of the second analog switch to be disconnected; the third operator is configured to: add the voltage signals on its input end and transmit them to the first driver.

[0013] Among them, the signal conversion circuit also includes a controllable switch, the control end of the controllable switch is connected to the output end of the first comparator, the controllable switch is connected to the first analog switch, the controllable switch is configured to send a first turn-on signal to the first analog switch when it is turned on, and is configured to send a first turn-off signal to the first analog switch when it is turned off; and the first comparator is specifically configured to: when the control voltage signal is greater than a preset positive voltage, control the controllable switch to be turned on to send the first turn-on signal to the first analog switch; when the control voltage signal is not greater than the preset positive voltage, control the controllable switch to be turned off to send the first turn-off signal to the first analog switch.

[0014] The signal conversion circuit also includes a first buffer, a second buffer and a third buffer, wherein the first buffer is connected between the first analog switch and the third operator, the second buffer is connected between the second analog switch and the third operator, and the third buffer is connected between the third operator and the first driver.

[0015] An embodiment of the present application further provides a vibration reduction system, which includes any one of the above-mentioned drive circuits.

[0016] The beneficial effects of the present application are as follows: the drive circuit and vibration reduction system provided by the present application, the drive circuit can be applied to the vibration reduction system, and includes a plurality of drive branches, the input ends of the plurality of drive branches respectively receive control signals, the output ends of the plurality of drive branches are respectively connected to a plurality of target devices for outputting force, and the plurality of drive branches include at least one first drive branch; wherein the first drive branch is configured to: when the received control signal satisfies a first preset condition, control the corresponding target device to be in a first output state, and when the received control signal satisfies a second preset condition, control the corresponding target device to be in a second output state; and the force output by the target device corresponding to the first drive branch in the first output state is less than the force output by the target device in the second output state, so that in the process of controlling the drive circuit to drive the target device (for example, a motor) to output a force of an expected size through a control signal, the drive circuit can independently control the output of a single target device, so that the drive circuit can simultaneously adapt to control scenarios of a wide range of output and high-precision output, thereby improving the control performance of the drive circuit, broadening the application scenarios of the product, and improving the applicability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0018] Figure 1 It is a structural schematic diagram of a driving circuit provided by the related technology; Figure 2 It is a schematic diagram of the relationship between the overall output force of all target devices driven by the driving circuit and the control signal in the related art; Figure 3 is a schematic diagram of the structure of a driving circuit provided in an embodiment of the present application; Figure 4 is a schematic diagram comparing the signal strength before and after the control signal is attenuated provided in an embodiment of the present application; Figure 5 is a schematic diagram of the relationship between the overall output force of all target devices driven by the driving circuit provided in the embodiment of the present application and the control signal; Figure 6is another structural schematic diagram of a driving circuit provided in an embodiment of the present application; Figure 7 is another structural schematic diagram of a driving circuit provided in an embodiment of the present application; Figure 8 is another structural schematic diagram of the driving circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0024] See also Figure 1 , Figure 1 Schematic diagram of the structure of the driving circuit provided by the related technology. Figure 1 As shown, the driving circuit in the related art includes a plurality of drivers (for example, driver A and driver B), the plurality of drivers respectively receive the control signal VIN, and each of the plurality of drivers is correspondingly connected to a target device, for example, driver A and driver B are respectively correspondingly connected to target device A and target device B. Moreover, each driver is configured to drive its corresponding target device to output force according to the control signal VIN in response to receiving the control signal VIN, and the magnitude of the force F outputted by all the target devices driven by the driving circuit as a whole is linearly proportional to the signal strength of the control signal VIN (for example, Figure 2 as shown).

[0025] However, the various drivers included in the driving circuit in the related art receive the control signal VIN synchronously, and synchronously drive the output force of their respective target devices, and the force output by each target device is the same. This makes the driving circuit in the related art only able to control the overall output of all target devices, but unable to independently control the output of a single target device. As a result, the driving circuit in the related art cannot adapt to control scenarios of large-range output and high-precision output at the same time, limiting its application scenarios.

[0026] In view of the above problems, the embodiments of the present application provide a driving circuit and a vibration reduction system. The driving circuit can be applied to the vibration reduction system and includes multiple driving branches, the input ends of the multiple driving branches respectively receive control signals, the output ends of the multiple driving branches are respectively connected to multiple target devices for outputting force, and the multiple driving branches include at least one first driving branch; wherein the first driving branch is configured to: when the received control signal meets the first preset condition, control the corresponding target device to be in a first output state, and when the received control signal meets the second preset condition, control the corresponding target device to be in a second output state; and the force output by the target device corresponding to the first driving branch in the first output state is less than the force output by the target device in the second output state, so that in the process of controlling the driving circuit to drive the target device (for example, a motor) to output the expected force through the control signal, the driving circuit can independently control the output of a single target device, so that the driving circuit can simultaneously adapt to the control scenarios of a wide range of output and high-precision output, thereby improving the control performance of the driving circuit, broadening the application scenarios of the product, and improving the applicability of the product.

[0027] The following is a detailed description with reference to specific embodiments. It should be noted that the serial numbers of the following embodiments are not intended to limit the preferred order of the embodiments.

[0028] See also Figure 3 , Figure 3 Schematic diagram of the structure of the driving circuit provided in the embodiment of the present application. Figure 3 As shown, the driving circuit 10 includes a plurality of driving branches 100 / 200, the input ends of the plurality of driving branches 100 / 200 respectively receive control signals VIN, and the output ends of the plurality of driving branches 100 / 200 are respectively connected to a plurality of target devices 20A / 20B for outputting force. Specifically, each driving branch 100 / 200 can be connected to a target device 20A / 20B, and different driving branches 100 / 200 can be connected to different target devices 20A / 20B, and each driving branch 100 / 200 is configured to drive its corresponding target device 20A / 20B to output force. The target device 20A / 20B can be a motor (e.g., a linear motor) or other devices with the same or similar functions.

[0029] Specifically, the above-mentioned multiple driving branches 100 / 200 may include at least one first driving branch 100, the first driving branch 100 is connected to its corresponding target device 20A, and the first driving branch 100 is configured to: when the received control signal VIN meets the first preset condition, control the corresponding target device 20A to be in a first output state, and when the received control signal VIN meets the second preset condition, control the corresponding target device 20A to be in a second output state. In addition, the force output by the target device 20A corresponding to the first driving branch 100 in the first output state is less than the force output in the second output state.

[0030] The control signal VIN is used to control the overall output of all target devices 20A / 20B driven by the driving circuit 10. Specifically, when the control signal VIN meets the first preset condition, the control signal VIN can control the overall output within a first range, and when the control signal VIN meets the second preset condition, the control signal VIN can control the overall output within a second range, which is different from the first range.

[0031] In this way, when the above-mentioned multiple drive branches 100 / 200 synchronously receive the same control signal VIN, by configuring the first drive branch 100 among the above-mentioned multiple drive branches 100 / 200 to automatically switch the output state of its corresponding target device 20A according to the actual situation of the control signal VIN, so as to achieve the output of different magnitudes of force, the drive circuit 10 is able to independently control the output of the target device 20A corresponding to the first drive branch 100, thereby improving the control performance of the drive circuit 10, and enabling the drive circuit 10 to simultaneously adapt to control scenarios of a wide range of output and high-precision output, thereby broadening the application scenarios.

[0032] In the driving circuit 10 , the number of first driving branches 100 may be less than or equal to the total number of driving branches 100 / 200 . That is, all of the multiple driving branches 100 / 200 may be first driving branches 100 , or only some of them may be first driving branches 100 .

[0033] In some embodiments, Figure 3As shown, the above-mentioned multiple driving branches 100 / 200 may only partially be the first driving branch 100. Specifically, the above-mentioned multiple driving branches 100 / 200 may also include at least one second driving branch 200, the second driving branch 200 is connected to its corresponding target device 20B, and the second driving branch 200 may be configured to: in response to receiving the control signal VIN, control its corresponding target device 20B to be in the third output state. In addition, the force output by the target device 20B corresponding to the second driving branch 200 in the third output state may be greater than the force output by the target device 20A corresponding to the first driving branch 100 in the second output state.

[0034] Specifically, the second driving branch 200 can be specifically configured to: in response to receiving the control signal VIN, control the corresponding target device 20B to be in the third output state according to the control signal VIN. In addition, the magnitude of the force output by the target device 20B corresponding to the second driving branch 200 in the third output state can be in direct proportion to the signal strength of the control signal VIN, for example, it can be in a linear direct proportion. In this way, the second driving branch 200 including the second driver 201 can be replaced by an existing driving circuit (such as Figure 1 As shown in the figure, the driving branch of driver A or driver B is provided, so that the above-mentioned driving circuit 10 in the embodiment of the present application can be obtained by converting part of the driving branches in the existing driving circuit into the first driving branch, which is beneficial to reducing product costs.

[0035] In some embodiments, Figure 3 As shown, the above-mentioned multiple driving branches 100 / 200 may only partially be the first driving branch 100. Moreover, when the first driving branch 100 executes to control the corresponding target device 20A to be in the first output state, it may specifically execute: controlling the corresponding target device 20A to stop outputting force, so as to achieve the control of the corresponding target device 20A to be in the first output state. In this way, the target device 20A corresponding to the first driving branch 100 is controlled to output force only when the control signal VIN meets the second preset condition, and will not output force when the control signal VIN meets the first preset condition, thereby improving the output accuracy of all target devices 20A / 20B driven by the driving circuit 10 when the overall output is smaller.

[0036] In some embodiments, Figure 3 As shown, the first driving branch 100 may include a signal conversion circuit 101 and a first driver 102. The signal conversion circuit 101 receives a control signal VIN, and the signal conversion circuit 101 is connected to the first driver 102, and the first driver 102 is connected to its corresponding target device 20A.

[0037] Furthermore, the signal conversion circuit 101 may be configured as follows: When the received control signal VIN meets the first preset condition, the control signal VIN is attenuated by a first attenuation method to obtain a first attenuated control signal VOUT1, and the first attenuated control signal VOUT1 is transmitted to the first driver 102; When the received control signal VIN meets the second preset condition, the control signal VIN is attenuated in a second attenuation manner to obtain a second attenuated control signal VOUT2 , and the second attenuated control signal VOUT2 is transmitted to the first driver 102 .

[0038] Accordingly, the first driver 102 may be configured as: In response to receiving the first attenuated control signal VOUT1 , controlling the corresponding target device 20A to be in a first output state; In response to receiving the second attenuated control signal VOUT2 , the corresponding target device 20A is controlled to be in a second output state.

[0039] Specifically, the attenuation of the control signal VIN by the first attenuation method may be: attenuating the signal strength of the control signal VIN to zero; or attenuating the signal strength of the control signal VIN by a first ratio. The attenuation of the control signal VIN by the second attenuation method may be: attenuating the signal strength of the control signal VIN by a second ratio, wherein the second ratio may be smaller than the first ratio; or attenuating the signal strength of the control signal VIN by a preset attenuation amount.

[0040] Specifically, the magnitude of the force output by the target device 20A corresponding to the first driver 102 in the first output state may be in direct proportion to the signal strength of the first attenuated control signal VOUT1, for example, in a linearly proportional relationship. The magnitude of the force output by the target device 20A corresponding to the first driver 102 in the second output state may be in direct proportion to the signal strength of the second attenuated control signal VOUT2, for example, in a linearly proportional relationship.

[0041] In this way, by building a signal conversion circuit 101 into the first drive branch 100, and using the signal conversion circuit 101 to attenuate the received control signal VIN and transmit it to the first driver 102, it is possible not only for the drive circuit 10 to reduce the force output by the target device 20A corresponding to the first drive branch 100 when the control signal VIN meets the first preset condition, but also for the drive circuit 10 to reduce the force output by the target device 20A corresponding to the first drive branch 100 when the control signal VIN meets the second preset condition. Therefore, not only the output accuracy of all target devices 20A / 20B driven by the drive circuit 10 when the overall output is smaller can be improved, but also the output accuracy of all target devices 20A / 20B driven by the drive circuit 10 when the overall output is larger can be improved.

[0042] In some specific embodiments, Figure 3 As shown, the control signal VIN can be specifically a control voltage signal VIN. Furthermore, when the control voltage signal VIN is greater than a preset negative voltage and less than a preset positive voltage, it can be considered that the control voltage signal VIN satisfies the first preset condition; when the control voltage signal VIN is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, it can be considered that the control voltage signal VIN satisfies the second preset condition. The control voltage signal VIN can be between a preset low voltage and a preset high voltage, wherein the preset low voltage and the preset negative voltage are both less than zero voltage (i.e., 0V), and the preset low voltage is less than the preset negative voltage, the preset high voltage and the preset positive voltage are both greater than zero voltage, and the preset high voltage is greater than the preset positive voltage. Specifically, the preset high voltage can be equal to the absolute value of the preset low voltage, the preset positive voltage can be equal to the absolute value of the preset negative voltage, exemplarily, the preset high voltage and the preset low voltage can be 10V and -10V respectively, the preset positive voltage and the preset negative voltage can be aV and -aV respectively, a is greater than zero and less than 10, and the specific value of a can be set according to the user's requirements for the output accuracy of the product at low output, for example, a can be equal to 1.

[0043] Furthermore, in a specific implementation, the signal conversion circuit 101 may be specifically configured as follows: When the received control voltage signal VIN is greater than the preset negative voltage and less than the preset positive voltage, the control voltage signal VIN is converted into zero voltage, and the zero voltage is transmitted to the first driver 102 as the first attenuated control signal VOUT1; When the received control voltage signal VIN is less than or equal to a preset negative voltage or greater than or equal to a preset positive voltage, the control voltage signal VIN is attenuated by a preset attenuation amount to obtain a second attenuated control signal VOUT2, and the second attenuated control signal VOUT2 is transmitted to the first driver 102.

[0044] Accordingly, the first driver 102 may be specifically configured as follows: In response to receiving the zero voltage, controlling the corresponding target device 20A to stop outputting force, so as to control the corresponding target device 20A to be in a first output state; In response to receiving the second attenuated control signal VOUT2 , the output force of the corresponding target device 20A is controlled according to the second attenuated control signal VOUT2 , so as to control the corresponding target device 20A to be in the second output state.

[0045] Specifically, the preset attenuation is greater than zero, and may be less than or equal to the absolute value of the preset negative voltage and / or the preset positive voltage, and, in specific implementation, the specific value of the preset attenuation may be set according to the user's requirements for the output accuracy of the product at high output. The magnitude of the force output by the target device 20A corresponding to the first driver 102 in the second output state may be in direct proportion to the signal strength of the second attenuated control signal VOUT2, for example, in a linear positive proportional relationship.

[0046] In this way, not only is it achieved that the above-mentioned driving circuit 10 controls the target device 20A corresponding to the first driving branch 100 to stop outputting force when the control voltage signal VIN is greater than the preset negative voltage and less than the preset positive voltage, but it is also achieved that the above-mentioned driving circuit 10 reduces the force output by the target device 20A corresponding to the first driving branch 100 when the control voltage signal VIN is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage. Therefore, not only the output accuracy of all target devices 20A / 20B driven by the driving circuit 10 when the overall output is smaller can be improved, but also the output accuracy of all target devices 20A / 20B driven by the driving circuit 10 when the overall output is larger can be improved.

[0047] In some embodiments, when the received control voltage signal VIN is less than or equal to a preset negative voltage or greater than or equal to a preset positive voltage, the signal conversion circuit 101 attenuates the control voltage signal VIN by a preset attenuation amount to obtain a second attenuated control signal VOUT2, and transmits the second attenuated control signal VOUT2 to the first driver 102, the following steps may be specifically performed: When the received control voltage signal VIN is less than or equal to the preset negative voltage, the preset negative voltage is subtracted from the control voltage signal VIN to obtain a second attenuated control signal VOUT2, and the second attenuated control signal VOUT2 is transmitted to the first driver 102; When the received control voltage signal VIN is greater than or equal to the preset positive voltage, the preset positive voltage is subtracted from the control voltage signal VIN to obtain a second attenuated control signal VOUT2 , and the second attenuated control signal VOUT2 is transmitted to the first driver 102 .

[0048] So, like Figure 4 As shown, it is achieved that: when the control voltage signal VIN is less than or equal to the preset negative voltage V2, the control voltage signal VIN is converted into a second attenuated control signal VOUT2 equal to the difference between the control voltage signal VIN and the preset negative voltage; when the control voltage signal VIN is greater than or equal to the preset positive voltage V1, the control voltage signal VIN is converted into a second attenuated control signal VOUT2 equal to the difference between the control voltage signal VIN and the preset positive voltage; when the control voltage signal VIN is greater than the preset negative voltage V2 and less than the preset positive voltage V1, the control voltage signal VIN is converted into a first attenuated control signal VOUT1 equal to zero voltage. Therefore, the signal continuity of the control voltage signal VIN after attenuation can be ensured.

[0049] Furthermore, by configuring the attenuated signal of the control voltage signal VIN as follows Figure 4 The continuous signal shown can further achieve the continuity of the force F output by all target devices 20A / 20B driven by the driving circuit 10 (such as Figure 5 As shown), to avoid a cliff-like increase or decrease in the overall output force F of all target devices 20A / 20B when the control voltage signal VIN is equal to or close to the preset positive voltage V1, and to avoid a cliff-like increase or decrease in the overall output force F of all target devices 20A / 20B when the control voltage signal VIN is equal to or close to the preset negative voltage V2, thereby further improving the control performance of the above-mentioned drive circuit 10, and when it is applied to the vibration reduction system, it can improve the vibration reduction performance and stability of the vibration reduction system.

[0050] In some specific embodiments, Figure 6 As shown, the signal conversion circuit 101 may include a first operator 1011, a first comparator 1012, a first analog switch 1013, a second operator 1014, a second comparator 1015, a second analog switch 1016 and a third operator 1017. The first operator 1011 and the first comparator 1012 are both connected to the first analog switch 1013. The second operator 1014 and the second comparator 1015 are both connected to the second analog switch 1016. The first analog switch 1013 and the second analog switch 1016 are both connected to the third operator 1017. The third operator 1017 is connected to the first driver 102.

[0051] Specifically, the first operator 1011 may receive the control voltage signal VIN and the preset positive voltage V1 respectively, and may be configured to: transmit the control voltage signal VIN minus the preset positive voltage V1 to the first input terminal a of the first analog switch 1013. In this way, the voltage on the first input terminal a of the first analog switch 1013 is equal to the difference obtained by subtracting the preset positive voltage V1 from the control voltage signal VIN, which is recorded as the voltage (VIN-V1).

[0052] The first comparator 1012 can receive the control voltage signal VIN and the preset positive voltage V1 respectively, and can be configured to: when the control voltage signal VIN is greater than the preset positive voltage V1, send a first on signal to the first analog switch 1013; when the control voltage signal VIN is not greater than the preset positive voltage V1, send a first off signal to the first analog switch 1013. The first on signal can be a high potential, and the first off signal can be a low potential.

[0053] The first analog switch 1013 can be configured as follows: in response to receiving a first conduction signal, controlling the conduction between the first input terminal a of the first analog switch 1013 and the output terminal c of the first analog switch 1013 to achieve the transmission of the voltage (VIN-V1) on the first input terminal a of the first analog switch 1013 to the first input terminal of the third operator 1017; in response to receiving a first shutdown signal, controlling the disconnection between the first input terminal a of the first analog switch 1013 and the output terminal c of the first analog switch 1013.

[0054] In this way, when the control voltage signal VIN is greater than the preset positive voltage V1, the voltage at the input end of the third operator 1017 is the voltage (VIN-V1), and at the same time, when the control voltage signal VIN is not greater than the preset positive voltage V1, the voltage (VIN-V1) is prevented from being transmitted to the input end of the third operator 1017.

[0055] Specifically, the second operator 1014 may receive the control voltage signal VIN and the preset negative voltage V2 respectively, and may be configured to transmit the control voltage signal VIN minus the preset negative voltage V2 to the first input terminal a of the second analog switch 1016. In this way, the voltage on the first input terminal a of the second analog switch 1016 is equal to the difference obtained by subtracting the preset negative voltage V2 from the control voltage signal VIN, which is recorded as the voltage (VIN-V2).

[0056] The second comparator 1015 can receive the control voltage signal VIN and the preset negative voltage V2 respectively, and can be configured to: when the control voltage signal VIN is less than the preset negative voltage V2, send a second on signal to the second analog switch 1016; when the control voltage signal VIN is not less than the preset negative voltage V2, send a second off signal to the second analog switch 1016. The second on signal can be a high potential, and the second off signal can be a low potential.

[0057] The second analog switch 1016 can be configured to: in response to receiving a second conduction signal, control the conduction between the first input terminal a of the second analog switch 1016 and the output terminal c of the second analog switch 1016 to achieve the transmission of the voltage (VIN-V2) on the first input terminal a of the second analog switch 1016 to the second input terminal of the third operator 1017; in response to receiving a second shutdown signal, control the shutdown between the first input terminal a of the second analog switch 1016 and the output terminal c of the second analog switch 1016.

[0058] In this way, when the control voltage signal VIN is less than the preset negative voltage V2, the voltage on the second input terminal of the third operator 1017 is the voltage (VIN-V2), and at the same time, when the control voltage signal VIN is not less than the preset negative voltage V2, the voltage (VIN-V2) is prevented from being transmitted to the input terminal of the third operator 1017.

[0059] Specifically, the third operator 1017 may be configured to add the voltage signals on its input terminals and transmit the sum to the first driver 102. Exemplarily, the third operator 1017 may have two input terminals, and one of the two input terminals is connected to the output terminal c of the first analog switch 1013 and the output terminal c of the second analog switch 1016, for receiving the above voltage (VIN-V1) and the above voltage (VIN-V2), and the other of the two input terminals receives zero voltage.

[0060] In this way, it is achieved that: when the control voltage signal VIN is greater than the preset positive voltage V1, the voltage output by the signal conversion circuit 101 to the first driver 102 is equal to the sum of the voltage (VIN-V1) plus the zero voltage, that is, equal to the voltage (VIN-V1); when the control voltage signal VIN is less than or equal to the preset positive voltage V1, and greater than or equal to the preset negative voltage V2, the voltage output by the signal conversion circuit 101 to the first driver 102 is equal to the zero voltage, and when the control voltage signal VIN is less than the preset negative voltage V2, the voltage output by the signal conversion circuit 101 to the first driver 102 is equal to the sum of the voltage (VIN-V2) plus the zero voltage, that is, equal to the voltage (VIN-V2).

[0061] Specifically, Figure 7As shown, the signal conversion circuit 101 may further include a controllable switch KA, the control end of the controllable switch KA is connected to the output end of the first comparator 1012, and the controllable switch KA is connected to the first analog switch 1013. For example, the controllable switch KA may be specifically a metal-oxide-semiconductor field effect transistor (MOSFET). In addition, the controllable switch KA may be configured to send a first on-signal to the first analog switch 1013 when it is turned on, and may be configured to send a first off-signal to the first analog switch 1013 when it is turned off. Accordingly, the first comparator 1012 may be specifically configured to: when the control voltage signal VIN is greater than the preset positive voltage V1, control the controllable switch V1 to be turned on to send the first on-signal to the first analog switch 1013; when the control voltage signal VIN is not greater than the preset positive voltage V1, control the controllable switch KA to be turned off to send the first off-signal to the first analog switch 1013. In this way, it is possible to avoid the first analog switch 1013 and the second analog switch 1016 being turned on at the same time, so as to improve the stability and reliability of the driving circuit 10 .

[0062] Specifically, Figure 6 As shown, the signal conversion circuit 101 may further include a first buffer 1018, a second buffer 1019 and a third buffer 1010. The first buffer 1018 is connected between the first analog switch 1013 and the third operator 1017, and can enhance the signal power of the voltage signal transmitted between the first analog switch 1013 and the third operator 1017. The second buffer 1019 is connected between the second analog switch 1016 and the third operator 1017, and can enhance the signal power of the voltage signal transmitted between the second analog switch 1016 and the third operator 1017. The third buffer 1010 is connected between the third operator 1017 and the first driver 102, and can enhance the signal power of the voltage signal transmitted between the third operator 1017 and the first driver 102. In this way, the stability and reliability of the driving circuit 10 are improved.

[0063] And, in specific implementation, Figure 8 As shown, the preset positive voltage V1 may be equal to the reference voltage VREF, and the absolute value of the preset negative voltage V2 may be equal to the reference voltage VREF. Specifically, the first operator 1011 may be a subtractor U6A, and the specific structure of the subtractor U6A and its connection relationship with other devices can be referred to Figure 8 The first comparator 1012 can be specifically a comparator U6B, and the specific structure of the comparator U6B and the connection relationship between it and other devices can be found in Figure 8 The first analog switch 1013 can be specifically an analog switch U12, and the specific structure of the analog switch U12 and the connection relationship between it and other devices can be found in Figure 8 The second operator 1014 can be specifically an adder U7B, and the specific structure of the adder U7B and its connection relationship with other devices can be found in Figure 8 The second comparator 1015 can be specifically a comparator U7C, and the reference voltage VREF is inverted by the voltage inverter U7A and then transmitted to the second comparator 1015. For the specific structure of the comparator U7C and its connection relationship with other devices, please refer to Figure 8 For the specific structure of the voltage inverter U7A and its connection relationship with other devices, please refer to Figure 8 The second analog switch 1016 can be specifically an analog switch U11, and the specific structure of the analog switch U11 and its connection relationship with other devices can be found in Figure 8 The third operator 1017 can be specifically an adder U9A, and the specific structure of the adder U9A and its connection relationship with other devices can be found in Figure 8 The controllable switch KA can be specifically a switch tube Q1, and the specific structure of the switch tube Q1 and its connection relationship with other devices can be found in Figure 8 The first buffer 1018 can be specifically a buffer U8A, and the specific structure of the buffer U8A and its connection relationship with other devices can be found in Figure 8 The second buffer 1019 can be specifically a buffer U8B, and the specific structure of the buffer U8B and its connection relationship with other devices can be found in Figure 8 The third buffer 1010 can be specifically a buffer U9B, and the specific structure of the buffer U9B and the connection relationship between it and other devices can be found in Figure 8 , I will not go into details here.

[0064] As can be seen from the above, the drive circuit provided in this embodiment includes multiple drive branches, the input ends of the multiple drive branches respectively receive control signals, the output ends of the multiple drive branches are respectively connected to multiple target devices for outputting force, and the multiple drive branches include at least one first drive branch; wherein the first drive branch is configured to: when the received control signal meets the first preset condition, control the corresponding target device to be in a first output state, and when the received control signal meets the second preset condition, control the corresponding target device to be in a second output state; and, the force output by the target device corresponding to the first drive branch in the first output state is less than the force output in the second output state, so that in the process of controlling the drive circuit to drive the target device (for example, a motor) to output an expected force through the control signal, the drive circuit can independently control the output of a single target device, so that the drive circuit can simultaneously adapt to the control scenarios of a wide range of output and high-precision output, thereby improving the control performance of the drive circuit, broadening the application scenarios of the product, and improving the applicability of the product.

[0065] An embodiment of the present application also provides a vibration reduction system, which includes a driving circuit of any of the above embodiments and multiple target devices (such as motors) for outputting force, wherein the driving circuit is used to drive the multiple target devices to output force to achieve the active vibration reduction function of the vibration reduction system.

[0066] Specifically, the driving circuit includes a plurality of driving branches, the input ends of the plurality of driving branches respectively receive control signals, the output ends of the plurality of driving branches are respectively connected to the plurality of target devices for outputting force, and the plurality of driving branches include at least one first driving branch. The first driving branch is configured to: when the received control signal satisfies a first preset condition, control the corresponding target device to be in a first output state, and when the received control signal satisfies a second preset condition, control the corresponding target device to be in a second output state. Furthermore, the force output by the target device corresponding to the first driving branch in the first output state is less than the force output by the target device in the second output state.

[0067] In some embodiments, the vibration reduction system may further include a bottom plate and a top plate that are relatively spaced apart, and the drive circuit and the target device may be disposed between the bottom plate and the top plate. Specifically, the vibration reduction system may further include a load, and the load may be fixed above the top plate, thereby achieving vibration reduction of the load.

[0068] In some specific embodiments, the vibration reduction system may further include a spring vibration reduction assembly and a sensor assembly disposed between the bottom plate and the top plate. One end (i.e., the top end) of the spring vibration reduction assembly is fixed to the top plate, and the other end (i.e., the bottom end) of the spring vibration reduction assembly is fixed to the bottom plate. The sensor assembly is fixed to the top plate and is used to detect the movement of the top plate.

[0069] Specifically, the vibration reduction system may further include a controller, which is capable of generating a control signal according to the detection result of the sensor assembly and sending the control signal to the input end of each drive branch in the drive circuit.

[0070] It should be noted that the vibration reduction system provided in the embodiment of the present application, since the driving circuit provided in the embodiment of the present application is set up, can achieve the beneficial effects that can be achieved by any driving circuit provided in the embodiment of the present application. Please refer to the previous embodiments for details, which will not be repeated here.

[0071] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A driving circuit, characterized in that: The device comprises a plurality of driving branches, wherein input ends of the plurality of driving branches respectively receive control signals, output ends of the plurality of driving branches respectively correspond to and are connected to a plurality of target devices for outputting force, and the plurality of driving branches include at least one first driving branch; Wherein, the first driving branch is configured to: when the received control signal meets the first preset condition, control the corresponding target device to be in the first output state, and when the received control signal meets the second preset condition, control the corresponding target device to be in the second output state; Furthermore, the force output by the target device corresponding to the first driving branch in the first output state is smaller than the force output by the target device in the second output state.

2. The driving circuit according to claim 1, characterized in that: The plurality of driving branches further include at least one second driving branch; Wherein, the second driving branch is configured to: in response to receiving the control signal, control the corresponding target device to be in a third output state; Furthermore, the force output by the target device corresponding to the second driving branch in the third output state is greater than the force output by the target device corresponding to the first driving branch in the second output state.

3. The driving circuit according to claim 1, characterized in that: When the first driving branch controls the corresponding target device to be in the first output state, the first driving branch specifically performs: The corresponding target device is controlled to stop outputting force, so as to control the corresponding target device to be in the first output state.

4. The driving circuit according to claim 1, characterized in that: The first driving branch includes a signal conversion circuit and a first driver, wherein the signal conversion circuit receives the control signal and is connected to the first driver, and the first driver is connected to the corresponding target device; Furthermore, the signal conversion circuit is configured to: when the received control signal meets the first preset condition, attenuate the control signal in a first attenuation manner to obtain a first attenuated control signal, and transmit the first attenuated control signal to the first driver; when the received control signal meets the second preset condition, attenuate the control signal in a second attenuation manner to obtain a second attenuated control signal, and transmit the second attenuated control signal to the first driver; The first driver is configured to: in response to receiving a first attenuated control signal, control the corresponding target device to be in the first output state, and the magnitude of the force output by the corresponding target device in the first output state is directly proportional to the signal strength of the first attenuated control signal; in response to receiving a second attenuated control signal, control the corresponding target device to be in the second output state, and the magnitude of the force output by the corresponding target device in the second output state is directly proportional to the signal strength of the second attenuated control signal.

5. The driving circuit according to claim 4, characterized in that: The control signal is a control voltage signal; The signal conversion circuit is specifically configured as follows: When the received control voltage signal is greater than a preset negative voltage and less than a preset positive voltage, the control voltage signal is converted into a zero voltage, and the zero voltage is transmitted to the first driver as a first attenuated control signal; When the received control voltage signal is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, the control voltage signal is attenuated by a preset attenuation amount to obtain a second attenuated control signal, and the second attenuated control signal is transmitted to the first driver; The first driver is specifically configured to: in response to receiving the zero voltage, control the corresponding target device to stop outputting force so as to control the corresponding target device to be in the first output state; and in response to receiving the second attenuated control signal, control the corresponding target device to output force according to the second attenuated control signal so as to control the corresponding target device to be in the second output state.

6. The driving circuit according to claim 5, characterized in that: When the signal conversion circuit performs the following steps when the received control voltage signal is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, the control voltage signal is attenuated by a preset attenuation amount to obtain a second attenuated control signal, and the second attenuated control signal is transmitted to the first driver: When the received control voltage signal is less than or equal to the preset negative voltage, subtracting the preset negative voltage from the control voltage signal to obtain a second attenuated control signal, and transmitting the second attenuated control signal to the first driver; When the received control voltage signal is greater than or equal to the preset positive voltage, the preset positive voltage is subtracted from the control voltage signal to obtain a second attenuated control signal, and the second attenuated control signal is transmitted to the first driver.

7. The driving circuit according to claim 5, characterized in that: The signal conversion circuit includes a first operator, a first comparator, a first analog switch, a second operator, a second comparator, a second analog switch and a third operator, wherein the first operator and the first comparator are both connected to the first analog switch, the second operator and the second comparator are both connected to the second analog switch, the first analog switch and the second analog switch are both connected to the third operator, and the third operator is connected to the first driver; The first operator receives the control voltage signal and the preset positive voltage respectively, and is configured to: subtract the preset positive voltage from the control voltage signal and transmit the result to the first input terminal of the first analog switch; The first comparator receives the control voltage signal and the preset positive voltage respectively, and is configured to: send a first turn-on signal to the first analog switch when the control voltage signal is greater than the preset positive voltage, and send a first turn-off signal to the first analog switch when the control voltage signal is not greater than the preset positive voltage; The first analog switch is configured to: in response to receiving the first conduction signal, control the first input terminal of the first analog switch to be conductive with the output terminal of the first analog switch, so as to transmit the control voltage signal after the preset positive voltage is subtracted to the input terminal of the third operator, and in response to receiving the first shutdown signal, control the first input terminal of the first analog switch to be disconnected from the output terminal of the first analog switch; The second operator receives the control voltage signal and the preset negative voltage respectively, and is configured to: subtract the preset negative voltage from the control voltage signal and transmit the result to the first input terminal of the second analog switch; The second comparator receives the control voltage signal and the preset negative voltage respectively, and is configured to: send a second on signal to the second analog switch when the control voltage signal is less than the preset negative voltage, and send a second off signal to the second analog switch when the control voltage signal is not less than the preset negative voltage; The second analog switch is configured to: in response to receiving the second conduction signal, control the first input terminal of the second analog switch to be connected with the output terminal of the second analog switch, so as to transmit the control voltage signal after the preset negative voltage is subtracted to the input terminal of the third operator, and in response to receiving the second shutdown signal, control the first input terminal of the second analog switch to be disconnected from the output terminal of the second analog switch; The third operator is configured to add the voltage signals on its input terminals and transmit the sum to the first driver.

8. The driving circuit according to claim 7, characterized in that: The signal conversion circuit further includes a controllable switch, a control end of the controllable switch is connected to the output end of the first comparator, the controllable switch is connected to the first analog switch, and the controllable switch is configured to send the first on signal to the first analog switch when it is turned on, and is configured to send the first off signal to the first analog switch when it is turned off; Furthermore, the first comparator is specifically configured to: when the control voltage signal is greater than the preset positive voltage, control the controllable switch to be turned on so as to send the first turn-on signal to the first analog switch; when the control voltage signal is not greater than the preset positive voltage, control the controllable switch to be turned off so as to send the first turn-off signal to the first analog switch.

9. The driving circuit according to claim 7, characterized in that: The signal conversion circuit also includes a first buffer, a second buffer and a third buffer, wherein the first buffer is connected between the first analog switch and the third operator, the second buffer is connected between the second analog switch and the third operator, and the third buffer is connected between the third operator and the first driver.

10. A vibration reduction system, characterized in that: The driving circuit comprises the driving circuit according to any one of claims 1 to 9.

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