Air valve actuator automatic cruise controller with counting function

Abstract

The utility model relates to an air valve actuator automatic cruise controller with a counting function, which comprises a main control module, the main control module is respectively connected with an input module, a switching value output circuit, an analog quantity output circuit, a current acquisition module and a counter signal output module, and the input module is used for inputting an operation mode of an air valve actuator; the switching value output circuit is used for switching the direction of a switching value output signal according to preset reversing time when the operation mode of the air valve actuator is a switching value automatic mode; the analog quantity output circuit is used for outputting an analog quantity signal according to a preset signal change stride and stride change delay when the operation mode of the air valve actuator is an analog quantity automatic mode; the current acquisition module is used for acquiring the output current of the actuator; and the main control module controls the counter signal output module to output a counting signal according to the output current of the actuator and the feedback signal of the actuator. According to the invention, each full stroke of the actuator can be counted.

Description

Technical Field

[0001] This invention relates to the field of valve actuator testing technology, and in particular to an automatic cruise controller for a valve actuator with counting function. Background Technology

[0002] Existing digital and analog signal control modules can only manually switch signals to control actuator operation, and the number of strokes the actuator has completed cannot be counted. Therefore, they cannot meet the needs of automatic operation and recording of the number of runs in company showrooms, exhibitions, R&D life tests, and other occasions. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automatic cruise controller for a damper actuator with a counting function, which can count each full stroke of the actuator.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: An automatic cruise controller for a damper actuator with counting function is provided, comprising a main control module. The main control module is connected to an input module, a digital output circuit, an analog output circuit, a current acquisition module, and a counter signal output module. The input module is used to input the operating mode of the damper actuator. The digital output circuit, under the control of the main control module, switches the direction of the digital output signal according to a preset commutation time when the damper actuator is in automatic digital mode. The analog output circuit, under the control of the main control module, outputs an analog signal according to a preset signal change step and step change delay when the damper actuator is in automatic analog mode. The current acquisition module is used to acquire the output current of the actuator. The main control module controls the counter signal output module to output a counting signal based on the output current of the actuator and the actuator feedback signal.

[0005] The main control module uses the AT32F421F8P7 chip.

[0006] The switching output circuit includes a transistor. The base of the transistor is connected to the switching output signal terminal of the main control module, the emitter is grounded, and the collector is connected to the power supply through a relay coil. When the switching output signal terminal of the main control module outputs a high level, the relay coil is energized, causing the actuator to be in the first direction. When the switching output signal terminal of the main control module outputs a low level, the relay coil is de-energized, causing the actuator to be in the second direction.

[0007] The analog output circuit includes an analog output module, which uses a GP8212S chip. The seventh pin of the GP8212S chip is connected to the base of a transistor. The collector of the transistor is connected to a power supply, and the emitter of the transistor is connected to an actuator. The emitter of the transistor is also connected to the sixth pin of the GP8212S chip through a feedback circuit.

[0008] The feedback circuit includes a first operational amplifier, a second operational amplifier, and a third operational amplifier. The non-inverting input of the first operational amplifier is connected to the emitter of the transistor, and the inverting input is connected to the output of the first operational amplifier. The non-inverting input of the second operational amplifier is connected to one end of a resistor, and the inverting input is connected to the output of the second operational amplifier. The other end of the resistor is connected to the non-inverting input of the first operational amplifier. The non-inverting input of the third operational amplifier is connected to the output of the first operational amplifier, and the inverting input is connected to the output of the second operational amplifier. The output of the third operational amplifier is connected to the sixth pin of the GP8212S chip.

[0009] The current acquisition module includes a first resistor, a second resistor, a third resistor, and a capacitor; one end of the first resistor is connected to the current output terminal of the actuator, and the other end is connected to the input current signal terminal of the main control module; one end of the second resistor is connected to one end of the first resistor, and the other end is grounded; one end of the third resistor is connected to one end of the first resistor, and the other end is grounded; one end of the capacitor is connected to the other end of the first resistor, and the other end is grounded.

[0010] The counter signal output module includes a transistor. The base of the transistor is connected to the counter signal output terminal of the main control module, the emitter is grounded, and the collector is connected to the power supply through a relay coil. When the counter signal output terminal of the main control module is high, the relay coil is energized and outputs a voltage signal to the counter for counting. When the counter signal output terminal of the main control module is low, the relay coil is de-energized and stops outputting a voltage signal.

[0011] Beneficial effects

[0012] Due to the adoption of the above technical solutions, the present invention has the following advantages and positive effects compared with the prior art: For the automatic mode of switch quantity, the present invention determines whether the actuator has completed a full round trip by detecting whether the current at the actuator output port reaches the stall value, thereby realizing the function of automatic counting; For the automatic mode of analog quantity, the present invention determines whether the actuator has completed a full round trip by reading the analog quantity signal and operating current fed back by the actuator in real time, when both the output analog quantity signal and the feedback analog quantity signal are zero and the operating current of the actuator increases and stalls, thereby realizing the function of automatic counting of each full stroke of the actuator. Attached Figure Description

[0013] Figure 1 This is a block diagram of the automatic cruise controller with counting function for the damper actuator according to an embodiment of the present invention;

[0014] Figure 2 This is a circuit diagram of the power supply module in an embodiment of this utility model;

[0015] Figure 3 This is a circuit diagram of the main control module in an embodiment of this utility model;

[0016] Figure 4 This is a circuit diagram of the analog output circuit in an embodiment of this utility model;

[0017] Figure 5 This is a circuit diagram of the input module in an embodiment of this utility model;

[0018] Figure 6 This is a circuit diagram of the current acquisition module in an embodiment of this utility model;

[0019] Figure 7 This is a circuit diagram of the switch output circuit in the embodiment of this utility model;

[0020] Figure 8 This is a circuit diagram of the counter signal output module in an embodiment of this utility model. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0022] The present invention relates to an automatic cruise controller for a damper actuator with a counting function, such as... Figure 1As shown, the device includes a main control module, which is connected to an input module, a digital output circuit, an analog output circuit, a current acquisition module, and a counter signal output module. The input module is used to input the operating mode of the damper actuator. The digital output circuit, under the control of the main control module, switches the direction of the digital output signal according to a preset commutation time when the damper actuator is in automatic digital mode. The analog output circuit, under the control of the main control module, outputs an analog signal according to a preset signal change step and step change delay when the damper actuator is in automatic analog mode. The current acquisition module is used to acquire the output current of the actuator. The main control module controls the counter signal output module to output a counting signal based on the output current of the actuator and the actuator feedback signal.

[0023] The power module used in this embodiment is as follows: Figure 2 As shown, the circuit includes a step-down circuit and a voltage regulator circuit. The step-down circuit converts a 24V weak current signal into a 12V voltage signal, and the voltage regulator circuit regulates the 12V voltage signal to a 3.3V voltage signal. The step-down circuit uses an MC34063 chip. Its first, eighth, and seventh pins are all connected to one end of resistor Rsc1, the sixth pin is connected to the other end of resistor Rsc1, the fourth pin is grounded, the third pin is grounded through capacitor C8, the second pin is connected to one end of inductor L1, the fifth pin is connected to resistor R1, and the other end of resistor R1 is connected to the other end of inductor L1. The second pin is also grounded through Zener diode D2, and the fifth pin is also grounded through resistor R2. The voltage regulator circuit uses an AMS1117_3.3 chip. Its first pin is grounded, the second pin is grounded through capacitor C3, and the third pin is connected to the other end of inductor L1.

[0024] like Figure 3 As shown, the main control module in this embodiment uses the AT32F421F8P7 chip. Its first pin is grounded through resistor R21, the fourth pin is connected to the power supply through resistor R22 and is also grounded through capacitor C16, the fifth pin is connected to the power supply and is also grounded through capacitor C17, the fifteenth pin is grounded, the sixteenth pin is connected to the power supply, and a capacitor C18 is connected between the fifteenth and sixteenth pins.

[0025] like Figure 4As shown, the analog output circuit in this embodiment includes an analog output module using a GP8212S chip. The first pin of the GP8212S chip is connected to the third pin of an AT32F421F8P7 chip, the second pin is connected to the second pin of the AT32F421F8P7 chip, the fourth pin is connected to the power supply and grounded through capacitor C14, the fifth pin is grounded, the sixth pin serves as a feedback terminal connected to the output of a feedback circuit, and the seventh pin is connected to the base of a transistor Q3. The collector of transistor Q3 is connected to the power supply, and the emitter of transistor Q3 is connected to an actuator switch. The emitter of transistor Q3 is also connected to the sixth pin of the GP8212S chip through the feedback circuit. The eighth pin of the GP8212S chip is grounded through capacitor C11. This analog output circuit can output a 0-10V analog control signal according to the signal from the main control module.

[0026] The feedback circuit includes a first operational amplifier U4A, a second operational amplifier U4B, and a third operational amplifier U4C. The non-inverting input of the first operational amplifier U4A is connected to the emitter of the transistor Q3, and the inverting input is connected to the output of the first operational amplifier U4A. The non-inverting input of the second operational amplifier U4B is connected to one end of a resistor R23, and the inverting input is connected to the output of the second operational amplifier U4B. The other end of the resistor R23 is connected to the non-inverting input of the first operational amplifier U4A. The non-inverting input of the third operational amplifier U4C is connected to the output of the first operational amplifier U4A, and the inverting input is connected to the output of the second operational amplifier U4B. The output is connected to the sixth pin of the GP8212S chip.

[0027] like Figure 5 As shown, the input module in this embodiment includes an analog time interval input circuit, an analog step adjustment input circuit, a switch switching time adjustment circuit, and a mode selection circuit. The analog time interval input circuit is connected to pin 11 of the GP8212S chip, the analog step adjustment input circuit is connected to pin 12 of the GP8212S chip, and the switch switching time adjustment circuit is connected to pin 13 of the GP8212S chip. The input module in this embodiment may also include an analog manual control circuit, which is connected to pin 10 of the GP8212S chip. The mode selection circuit is connected to pins 14, 17, and 18 of the GP8212S chip. This input module sends the on / off signals of the multi-segment switches to the main control module, thereby setting the operating mode. The voltage of the I / O port of the main control module is changed by the potentiometer value to set the interval time, analog step size, switch switching time, and the signal magnitude of the manual analog output.

[0028] like Figure 6 As shown, the current acquisition module in this embodiment includes resistors R11, R12, and R13, and capacitor C9. One end of resistor R11 is connected to the current output terminal of the actuator, and the other end is connected to the input current signal terminal of the main control module. One end of resistor R12 is connected to one end of resistor R11, and the other end is grounded. One end of resistor R13 is connected to one end of resistor R11, and the other end is grounded. One end of capacitor C9 is connected to the other end of resistor R11, and the other end is grounded. This current acquisition module can collect the current data of the actuator, allowing the main control module to determine whether it is operating normally or the actuator has stalled.

[0029] like Figure 7 As shown, the switching output circuit in this embodiment includes a transistor Q1. The base of transistor Q1 is connected to pin 8 of the GP8212S chip, the emitter is grounded, and the collector is connected to the power supply through a relay coil. When pin 8 of the GP8212S chip outputs a high level, the relay coil is energized, causing the actuator to be in a first direction. When pin 8 of the GP8212S chip outputs a low level, the relay coil is de-energized, causing the actuator to be in a second direction. This switching output circuit can switch the conducting pin position of the relay according to the control signal from the main control module, thereby changing the operating direction of the switching actuator.

[0030] like Figure 8 As shown, the counter signal output module in this embodiment includes a transistor Q2. The base of transistor Q2 is connected to pin 9 of the GP8212S chip, its emitter is grounded, and its collector is connected to the power supply through a relay coil. When the output of pin 9 of the GP8212S chip is high, the relay coil is energized and outputs a voltage signal to the counter for counting. When the output of pin 9 of the GP8212S chip is low, the relay coil is de-energized and stops outputting a voltage signal. This counter signal output module can control the relay to turn on and off according to the control signal of the main control module, thereby outputting a 24V voltage signal to the counter to realize the counting function.

[0031] The automatic counting process of the automatic cruise controller for the damper actuator with counting function in this embodiment is as follows:

[0032] After power-on, the main control module reads the mode input by the input module.

[0033] If the current mode is analog manual mode, the main control module outputs a PWM signal to the 0-10V or 0-20mA analog module according to the position of the manually adjusted potentiometer, thereby outputting an analog control signal. In this mode, the analog control signal does not change automatically; it only adjusts the magnitude of the analog output signal according to the position of the manually adjusted potentiometer.

[0034] If the current mode is automatic switch signal mode, the main control module switches the direction of the switch signal output according to the set commutation time. The commutation time is set within the range of 30s-180s. While switching directions, the main control module detects the magnitude of the actuator output current. If the actuator output current reaches the stall value, it indicates that the actuator has reached its limit position and stalled. If stalling is detected in a specific direction, it can be determined that the actuator has completed a full round trip. At this time, the main control module outputs a counter signal to increment the external counter by one. This cycle repeats to achieve automatic cruise operation of the switch signal and to count the number of runs.

[0035] If the current mode is analog automatic mode, the main control module outputs a signal to the analog signal output module based on the set analog signal change step size and step change delay, thereby controlling the actuator opening. The analog signal change step size setting range is 0.5-2V, and the step change delay adjustment range is 10-100s. Taking a step size of 1V and a delay of 30s as an example, the main control module initially outputs an analog signal of 0V. After the 30s delay, the output analog signal becomes 1V. After another 30s, the analog signal increases by 1V to 2V, and so on, outputting the signal in a loop until the maximum value of 10V is reached. After another 30s, the output analog signal decreases by 1V until it reaches 0V. During operation, the position information and output current of the actuator are read in real time. When both the output position signal and the feedback position signal are 0V, it is determined whether the actuator output current has increased and stalled. If so, the main control module outputs a counter signal to increment the external counter by one. This loop is repeated to achieve automatic analog cruise operation and to count the number of runs.

[0036] It is easy to see that, for the automatic mode of digital input, this invention determines whether the actuator has completed a full round trip by detecting whether the current at the actuator output port reaches the stall value, thereby achieving the function of automatic counting; for the automatic mode of analog input, it determines whether the actuator has completed a full round trip by reading the analog signal and operating current fed back by the actuator in real time. When both the output analog signal and the feedback analog signal are zero and the actuator's operating current increases and stalls, it achieves the function of automatically counting each full stroke of the actuator.

Claims

1. An automatic cruise controller for a damper actuator with counting function, characterized in that, The system includes a main control module, which is connected to an input module, a digital output circuit, an analog output circuit, a current acquisition module, and a counter signal output module. The input module is used to input the operating mode of the damper actuator. The digital output circuit, under the control of the main control module, switches the direction of the digital output signal according to a preset commutation time when the damper actuator is in automatic digital mode. The analog output circuit, under the control of the main control module, outputs an analog signal according to a preset signal change step size and step change delay when the damper actuator is in automatic analog mode. The current acquisition module is used to acquire the actuator's output current. The main control module controls the counter signal output module to output a counting signal based on the actuator's output current and the actuator's feedback signal.

2. The automatic cruise controller for the damper actuator with counting function according to claim 1, characterized in that, The main control module uses the AT32F421F8P7 chip.

3. The automatic cruise controller for the damper actuator with counting function according to claim 1, characterized in that, The switching output circuit includes a transistor. The base of the transistor is connected to the switching output signal terminal of the main control module, the emitter is grounded, and the collector is connected to the power supply through a relay coil. When the switching output signal terminal of the main control module outputs a high level, the relay coil is energized, causing the actuator to be in the first direction. When the switching output signal terminal of the main control module outputs a low level, the relay coil is de-energized, causing the actuator to be in the second direction.

4. The automatic cruise controller for the damper actuator with counting function according to claim 1, characterized in that, The analog output circuit includes an analog output module, which uses a GP8212S chip. The seventh pin of the GP8212S chip is connected to the base of a transistor. The collector of the transistor is connected to a power supply. The emitter of the transistor is connected to an actuator. The emitter of the transistor is also connected to the sixth pin of the GP8212S chip through a feedback circuit.

5. The automatic cruise controller for the damper actuator with counting function according to claim 4, characterized in that, The feedback circuit includes a first operational amplifier, a second operational amplifier, and a third operational amplifier. The non-inverting input of the first operational amplifier is connected to the emitter of the transistor, and the inverting input is connected to the output of the first operational amplifier. The non-inverting input of the second operational amplifier is connected to one end of a resistor, and the inverting input is connected to the output of the second operational amplifier. The other end of the resistor is connected to the non-inverting input of the first operational amplifier. The non-inverting input of the third operational amplifier is connected to the output of the first operational amplifier, and the inverting input is connected to the output of the second operational amplifier. The output of the third operational amplifier is connected to the sixth pin of the GP8212S chip.

6. The automatic cruise controller for the damper actuator with counting function according to claim 1, characterized in that, The current acquisition module includes a first resistor, a second resistor, a third resistor, and a capacitor; one end of the first resistor is connected to the current output terminal of the actuator, and the other end is connected to the input current signal terminal of the main control module; one end of the second resistor is connected to one end of the first resistor, and the other end is grounded; one end of the third resistor is connected to one end of the first resistor, and the other end is grounded; one end of the capacitor is connected to the other end of the first resistor, and the other end is grounded.

7. The automatic cruise controller for the damper actuator with counting function according to claim 1, characterized in that, The counter signal output module includes a transistor. The base of the transistor is connected to the counter signal output terminal of the main control module, the emitter is grounded, and the collector is connected to the power supply through a relay coil. When the counter signal output terminal of the main control module is high, the relay coil is energized and outputs a voltage signal to the counter for counting. When the counter signal output terminal of the main control module is low, the relay coil is de-energized and stops outputting a voltage signal.

Images