Driving detection circuit of current type execution component

Abstract

The invention provides a driving detection circuit of a current type executive component, which comprises a driving control signal input circuit, an executive component current driving output circuit, a driving current state acquisition circuit and a driving current state comparison detection circuit, and is characterized in that the driving control signal input circuit is respectively connected to a driving control signal and a driving feedback signal; the driving control signal input circuit is connected to the execution component current driving output circuit and the driving current state comparison detection circuit, and the execution component current driving output circuit and the driving current state comparison detection circuit are connected through the driving current state acquisition circuit. The driving current state acquisition circuit is connected to the execution driving output signal and the execution driving current detection signal. The driving detection circuit of the current type execution component is simple in structure and easy to realize; and the requirement on the precision of the resistor is low, the error is small, the data acquisition value is accurate, convenience is provided for subsequent test and design work, and the design cost is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of power electronics, and in particular relates to a drive detection circuit of a current-type execution component. Background Art

[0002] With the rapid development of electronic technology, current-type actuators are widely used in motor control, power management, automatic control systems and other fields. These systems require precise detection and control of current to ensure stable operation and efficient performance of the actuators. The performance of electronic components such as operational amplifiers, MOS field-effect transistors, and current sensors has been continuously improved, providing a better implementation basis for the design of current drive detection circuits. These components have the characteristics of high precision, low power consumption, and fast response, and can meet the needs of complex application scenarios. The drive detection circuit of the current-type actuator combines the logic control and AD acquisition functions of the embedded system to meet the design requirements, and uses general-purpose devices to achieve the design goals of control isolation, current output, signal detection, and feedback adjustment. Summary of the invention

[0003] In view of this, the present invention aims to propose a drive detection circuit for a current-type actuator, so as to provide a current-type actuator drive detection circuit that can realize drive control and current collection, has strong component versatility, and has a simple circuit structure.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A drive detection circuit for a current-type execution component comprises a drive control signal input circuit, an execution component current drive output circuit, a drive current state acquisition circuit and a drive current state comparison detection circuit, wherein the drive control signal input circuit is respectively connected to a drive control signal and a drive feedback signal, the drive control signal is connected to a system microcontroller logic output terminal for realizing the output transmission of a microprocessor drive control signal, and the drive feedback signal is connected to a microprocessor state feedback detection terminal; the drive control signal input circuit is respectively connected to an execution component current drive output circuit and a drive current state comparison detection circuit, the execution component current drive output circuit and the drive current state comparison detection circuit are connected through a drive current state acquisition circuit, the drive current state acquisition circuit is respectively connected to an execution drive output signal and an execution drive current detection signal, the execution drive current detection signal is connected to a system microcontroller current signal AD detection terminal, and the execution drive output signal is connected to an external current-type execution drive load.

[0006] Furthermore, the drive control signal input circuit includes a transistor Q5 and a transistor Q3, the base of the transistor Q5 is connected to the drive control signal terminal (provided by an external microcontroller) through R82, the emitter is connected to DGND (digital ground), the collector is connected to the drive feedback signal terminal, the cathode of the diode D11, one end of R74 and the base of the transistor Q3, the base of the transistor Q3 is connected to 5VD1 (digital input voltage) through R74, the emitter of the transistor Q3 is connected to DGND (digital ground), the collector of the transistor Q3 is connected to the input terminal 2 pin of the optocoupler U24, the input terminal 1 pin of the optocoupler U24 is connected to DGND through a resistor R69 and a capacitor C67, and the resistor R69 and the capacitor C67 are connected to 5VD1.

[0007] Furthermore, the current drive output circuit of the execution component includes field effect transistors Q4, R17 and R170. The gate of the field effect transistor Q4 is connected to the output terminal 4 pin of the optocoupler U24 through R170 and to the 24VP2 power input voltage through R71. C68 is connected between the 24VP2 power input voltage and PGND (power ground). R71 is also connected in parallel with a voltage regulator Z2. The output terminal 3 pin of the optocoupler U24 is connected to PGND; the drain of the field effect transistor Q4 is connected to the 24VP2 power input voltage; the source of the field effect transistor Q4 is connected to PGND (power ground) and to pins 1 and 2 of the current sensor U25 through diode D28.

[0008] Furthermore, the driving current state acquisition circuit includes a current sensor U25, wherein pins 3 and 4 of the current sensor U25 are connected to the execution driving output signal port via the fuse F4, and pin 5 of the current sensor U25 is connected to DGND; pin 6 of the current sensor U25 is connected to DGND via C91; pin 8 of the current sensor U25 is respectively connected to the 5VD1 digital input voltage and to DGND via capacitor C71; pin 7 of the current sensor U25 is respectively connected to DGND via C124, connected to the execution driving current detection output signal port, and connected to pin 2 of the comparator U11A via R73, and C124 is also connected in parallel with R172.

[0009] Furthermore, the driving current state comparison detection circuit includes a comparator U11A, wherein pin 3 of the comparator U11A is respectively connected to the anode of the diode D11 via R64, to AGND (analog ground) via R66, and to 5VR3 (external reference voltage) via R65, pin 4 of the comparator U11A is connected to DGND (digital ground), and pin 8 of the comparator U11A is respectively connected to DGND via C66 and to 5VD1.

[0010] Furthermore, the transistor Q3 and the transistor Q5 are low-power NPN transistors used for transistor small-signal switch control.

[0011] Furthermore, the resistor R65 and the resistor R66 are reference voltage dividing resistors, and the resistance accuracy of the resistors is 1%.

[0012] Furthermore, the diode Z2 is a voltage regulator diode.

[0013] Furthermore, the diodes D11 and D28 are silicon switching diodes.

[0014] Furthermore, the insurance F4 is a self-recovering insurance.

[0015] Compared with the prior art, the driving detection circuit of the current-type actuator of the present invention has the following advantages:

[0016] (1) The driving detection circuit of the current-type actuator described in the present invention has a simple structure and is easy to implement; it has low requirements on the precision of the resistor, small errors, and accurate data acquisition values, which facilitates subsequent experiments and design work and saves design costs.

[0017] (2) The comparator, field effect transistor, triode and current sensor provided in the driving detection circuit of the current-type actuator of the present invention are all common devices with strong versatility and wide application range.

[0018] (3) The drive detection circuit of the current-type actuator described in the present invention performs real-time state detection and limited protection on the execution drive current through a current sensor and a comparator, thereby improving the safety and stability of the drive circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a driving detection circuit for a current-type execution component according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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 invention 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 limiting the present invention. In addition, the terms "first", "second", and the like 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. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0025] A drive detection circuit for a current-type actuator, such as Figure 1 As shown, it includes a drive control signal input circuit, an execution component current drive output circuit, a drive current state acquisition circuit and a drive current state comparison detection circuit. The drive control signal input circuit is respectively connected to a drive control signal port and a drive feedback signal port. The drive control signal port is connected to a system microcontroller logic output terminal for realizing the output transmission of a microprocessor drive control signal. The drive feedback signal port is connected to a microprocessor state feedback detection terminal; the drive control signal input circuit is respectively connected to an execution component current drive output circuit and a drive current state comparison detection circuit. The execution component current drive output circuit and the drive current state comparison detection circuit are connected through a drive current state acquisition circuit. The drive current state acquisition circuit is respectively connected to an execution drive output signal port and an execution drive current detection signal port. The execution drive current detection signal port is connected to a system microcontroller current signal AD detection terminal. The execution drive output signal port is connected to an external current-type execution drive load.

[0026] The drive control signal input circuit includes transistor Q5 and transistor Q3. The base of transistor Q5 is connected to the drive control signal terminal (provided by an external microcontroller) through R82, the emitter is connected to DGND (digital ground), the collector is connected to the drive feedback signal terminal, the cathode of diode D11, one end of R74 and the base of transistor Q3, the base of transistor Q3 is connected to 5VD1 (digital input voltage) through R74, the emitter of transistor Q3 is connected to DGND (digital ground), the collector of transistor Q3 is connected to input terminal 2 pin of optocoupler U24, the input terminal 1 pin of the optocoupler U24 is connected to DGND through resistor R69 and capacitor C67, and the resistor R69 and capacitor C67 are connected to 5VD1.

[0027] The executive component current drive output circuit includes field effect transistor Q4, R17 and R170. The gate of field effect transistor Q4 is connected to the output terminal 4 pin of optocoupler U24 through R170 and to the 24VP2 power input voltage through R71. C68 is connected between the 24VP2 power input voltage and PGND (power ground). R71 is also connected in parallel with a voltage regulator Z2. The output terminal 3 pin of optocoupler U24 is connected to PGND; the drain of field effect transistor Q4 is connected to the 24VP2 power input voltage; the source of field effect transistor Q4 is connected to PGND (power ground) and to pins 1 and 2 of current sensor U25 through diode D28.

[0028] The driving current state acquisition circuit includes a current sensor U25. Pins 3 and 4 of the current sensor U25 are connected to the execution driving output signal port (external actuator) through the fuse F4, and the pin 5 of the current sensor U25 is connected to DGND; the pin 6 of the current sensor U25 is connected to DGND (digital ground) through C91; the pin 8 of the current sensor U25 is connected to the 5VD1 digital input voltage and to DGND through the capacitor C71; the pin 7 of the current sensor U25 is connected to DGND through C124, connected to the execution driving current detection signal port (external actuator), and connected to the pin 2 of the comparator U11A through R73, and C124 is also connected in parallel with R172.

[0029] The driving current state comparison detection circuit includes a comparator U11A, wherein the 3rd pin of the comparator U11A is connected to the anode of the diode D11 via R64, to AGND (analog ground) via R66, and to 5VR3 (external reference voltage) via R65, the 4th pin of the comparator U11A is connected to DGND (digital ground), and the 8th pin of the comparator U11A is connected to DGND and 5VD1 via C66.

[0030] The transistor Q3 and the transistor Q5 are low-power NPN transistors, which are used for transistor small-signal switch control.

[0031] The optical coupler U24 is a general-purpose photoelectric coupling device used for electrical signal isolation.

[0032] The field effect transistor Q4 is a general-purpose P-channel field effect transistor, which is used for driving current control.

[0033] The current sensor U25 is an isolated linear current sensor based on the Hall effect and is integrated and designed for driving current detection.

[0034] The comparator U11A is used for comparing and identifying the detection voltage with the reference voltage.

[0035] The resistor R65 and the resistor R66 are reference voltage (feedback comparison output reference voltage) voltage-dividing resistors, and the resistance accuracy is 1%.

[0036] The diode Z2 is a voltage stabilizing diode.

[0037] The diodes D11 and D28 are silicon switching diodes.

[0038] The insurance F4 is a self-recovering insurance.

[0039] The working principle of a driving detection circuit of a current-type actuator is as follows:

[0040] The embedded microcontroller outputs the driving control signal through the driving control signal port. When the control signal is at a high level, the transistor Q5 is turned on, the transistor Q3 is turned off, and the circuit is in a stopped working state. When the control signal is at a low level, the transistor Q5 is turned off, the transistor Q3 is turned on, the input end of the optocoupler U24 has a current enable, and the output end forms a voltage divider loop with the resistor R71 and the resistor R170 for the power voltage 24V. The field effect tube Q4 is turned on by the voltage control gate, and the power current is output to the current type execution component through the source and drain of the field effect tube Q4 and the detection end of the current sensor U25 and the overcurrent fuse F4 to realize external drive.

[0041] The driving current passes through the detection end of the current sensor U25 to complete the linear conversion of the working current to voltage. The conversion voltage is input into the microcontroller to execute the driving current detection signal port to realize the current signal system identification of AD conversion. The conversion voltage is connected to the negative input end of the comparator U11A, and its voltage value is compared with the resistor divider network formed by the reference 5V voltage, resistor R65, and resistor R66 (a fixed voltage value set according to the current output situation). When the conversion voltage is less than the reference voltage, the comparator U11A outputs a high level, which does not affect the normal working state of the circuit; when the conversion voltage is greater than the reference voltage, the comparator U11A outputs a low level, so that the transistor Q3 is cut off and the circuit stops working. The comparator output level state is connected to the drive feedback signal port to realize the feedback state identification of the microprocessor.

[0042] When the accuracy of the reference voltage divider resistors R65 and R66 in the circuit of the embodiment of the present invention is 1%, the reference voltage value can be output stably and accurately, meeting the precise output requirement of the control signal.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drive detection circuit for a current-type actuator, characterized in that: It includes a drive control signal input circuit, an execution component current drive output circuit, a drive current state acquisition circuit and a drive current state comparison detection circuit. The drive control signal input circuit is respectively connected to a drive control signal port and a drive feedback signal port. The drive control signal port is connected to a system microcontroller logic output terminal for realizing the output transmission of a microprocessor drive control signal. The drive feedback signal port is connected to a microprocessor state feedback detection terminal. The drive control signal input circuit is respectively connected to an execution component current drive output circuit and a drive current state comparison detection circuit. The execution component current drive output circuit and the drive current state comparison detection circuit are connected through a drive current state acquisition circuit. The drive current state acquisition circuit is respectively connected to an execution drive output signal port and an execution drive current detection signal port. The execution drive current detection signal port is connected to a system microcontroller current signal AD detection terminal. The execution drive output signal port is connected to an external current-type execution drive load.

2. The drive detection circuit of a current-type actuator according to claim 1, characterized in that: The drive control signal input circuit includes a transistor Q5 and a transistor Q3. The base of the transistor Q5 is connected to the drive control signal port through R82, the emitter is connected to DGND, and the collector is connected to the drive feedback signal port, the cathode of the diode D11, one end of R74 and the base of the transistor Q3. The base of the transistor Q3 is connected to 5VD1 through R74, the emitter of the transistor Q3 is connected to DGND, and the collector of the transistor Q3 is connected to the input terminal 2 pin of the optocoupler U24. The input terminal 1 pin of the optocoupler U24 is connected to DGND through a resistor R69 and a capacitor C67, and the resistor R69 and the capacitor C67 are connected to 5VD1.

3. The drive detection circuit of a current-type actuator according to claim 2, characterized in that: The current drive output circuit of the executive component includes field effect transistor Q4, R17 and R170. The gate of the field effect transistor Q4 is connected to the output terminal 4 pin of the optocoupler U24 through R170 and to the 24VP2 power input voltage through R71. C68 is connected between the 24VP2 power input voltage and PGND. R71 is also connected in parallel with a voltage regulator Z2. The output terminal 3 pin of the optocoupler U24 is connected to PGND; the drain of the field effect transistor Q4 is connected to the 24VP2 power input voltage; the source of the field effect transistor Q4 is connected to PGND and to pins 1 and 2 of the current sensor U25 through diode D28.

4. The drive detection circuit of a current-type actuator according to claim 1, characterized in that: The driving current state acquisition circuit includes a current sensor U25. Pins 3 and 4 of the current sensor U25 are connected to the execution driving output signal port through the fuse F4, and the pin 5 of the current sensor U25 is connected to DGND; the pin 6 of the current sensor U25 is connected to DGND through C91; the pin 8 of the current sensor U25 is respectively connected to the 5VD1 digital input voltage and to DGND through the capacitor C71; the pin 7 of the current sensor U25 is respectively connected to DGND through C124, connected to the execution driving current detection output signal port, and connected to the pin 2 of the comparator U11A through R73, and C124 is also connected in parallel with R172.

5. The drive detection circuit of a current-type actuator according to claim 1, characterized in that: The driving current state comparison detection circuit includes a comparator U11A, wherein the 3rd pin of the comparator U11A is connected to the anode of the diode D11 via R64, to AGND via R66, and to 5VR3 via R65, the 4th pin of the comparator U11A is connected to DGND, and the 8th pin of the comparator U11A is connected to DGND via C66 and to 5VD1.

6. The drive detection circuit of a current-type actuator according to claim 2, characterized in that: Transistor Q3 and transistor Q5 are low-power NPN transistors used for transistor small signal switch control.

7. The drive detection circuit of a current-type actuator according to claim 5, characterized in that: Resistors R65 and R66 are reference voltage divider resistors, and their resistance accuracy is 1%.

8. The drive detection circuit of a current-type actuator according to claim 3, characterized in that: Diode Z2 is a voltage-stabilizing diode.

9. The driving detection circuit of a current-type actuator according to claim 3, characterized in that: Diodes D11 and D28 are silicon switching diodes.

10. The driving detection circuit of a current-type actuator according to claim 4, characterized in that: Insurance F4 is a self-recovering insurance.

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