Circuit for controlling vibrator by main control board of grain counting machine

Abstract

The utility model relates to the technical field of grain counting machine driving, and discloses a grain counting machine main control board control vibrator circuit, which comprises a peripheral digital circuit, an internal analog control circuit and a power supply module, the peripheral digital circuit comprises an FPGA (Field Programmable Gate Array) module, a relay interruption module and a coupling circuit module, the FPGA module is used for generating a PWM (Pulse Width Modulation) differential modulation signal; the relay interruption module receives the PWM differential modulation signal, amplifies the PWM differential modulation signal and transmits the amplified PWM differential modulation signal to the coupling circuit module, the coupling circuit module further amplifies the PWM differential modulation signal and isolates an interference signal, and the coupling circuit module outputs four paths of input vibrator controller signals and transmits the signals to the internal analog control circuit; after processing, four paths of output vibrator control signals are output, the internal analog control circuit comprises four control circuits, and the power supply module is used for supplying power to each module; according to the utility model, the four control circuits are connected in parallel to realize the parallel connection of the four vibrators, and interlocking control is added, so that the process cost is saved, and the control precision of the vibrators is improved.

Description

Technical Field

[0001] This utility model relates to the field of grain counting machine drive technology, specifically a grain counting machine main control board control vibrator circuit. Background Technology

[0002] A particle counter is a precision device that uses high-precision sensors and image signal processing to count particles. It is often used for packaging and counting valuable items such as pharmaceuticals and jewelry. The main control board receives operation commands from the host computer, drives the vibrator to shake off the material, detects and identifies the falling objects through a camera, and finally counts them.

[0003] The common problem with existing grain counting machines on the market is that the material tends to pile up during the falling process, which makes it impossible for the camera to correctly identify the number of materials, thus causing system errors. A major reason for these errors is that the control of the vibrator is not precise enough, which prevents the material from being fully dispersed. Therefore, it is necessary to design a circuit to improve the accuracy of the vibrator control and realize the grading of the vibrator, so as to ensure that the material is fully dispersed. Utility Model Content

[0004] The purpose of this invention is to provide a control circuit for the vibrator on the main control board of a counting machine, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a main control board circuit for a grain counting machine that controls a vibrator, including a peripheral digital circuit, an internal analog control circuit, and a power supply module.

[0006] The peripheral digital circuit includes an FPGA module, a relay interrupt module, and a coupling circuit module. The FPGA module generates a PWM differential modulation signal from the input signal through hardware encoding. The relay interrupt module receives the PWM differential modulation signal, amplifies it, and transmits it to the coupling circuit module. The coupling circuit module further amplifies the PWM differential modulation signal and isolates interference signals. The coupling circuit module includes two coupling inductors, each of which outputs two input vibrator control signals, meaning the coupling circuit module outputs four input vibrator controller signals.

[0007] The internal analog control circuit includes four control circuits for processing the four input vibrator control signals and outputting four output vibrator control signals. Each control circuit is used to output a single output vibrator control signal. The four control circuits are connected in parallel to simultaneously control the operation and stop of the four vibrators. Each single output vibrator control signal includes two sub-signals. The internal analog control circuit can implement an interlock function to ensure that at most one of the two sub-signals remains on.

[0008] The power module is used to generate a DC voltage of 5V, 12V, or 100V to power each module.

[0009] Preferably, the FPGA module uses an EP4CE10E22C8N chip, the relay interrupt module uses an MC1413D chip, pin 120 of the EP4CE10E22C8N chip is connected to pin 4 of the MC1413D chip through resistor R10, pin 121 of the EP4CE10E22C8N chip is connected to pin 3 of the MC1413D chip through resistor R9, and pins 120 and 121 of the EP4CE10E22C8N chip are used to transmit PWM differential modulation signals.

[0010] Preferably, the coupling inductor is a TLP521 chip, which has U1C and U2C. Pin 4 of U1C is connected to pin 12 of MC1413D and is used to receive control signal Control1. Pin 2 of U2C is connected to pin 11 of MC1413D and is used to receive control signal Control2. Pin 8 of U1C is used to transmit the first input vibrator control signal OUT1. Pins 5 and 7 of U1C are connected in parallel to transmit the second input vibrator control signal OUT2. Pin 8 of U2C is used to transmit the third input vibrator control signal OUT4. Pins 5 and 7 of U2C are connected in parallel to transmit the fourth input vibrator control signal OUT5.

[0011] Preferably, the four control circuits are set as C0 to C3. The control circuit C0 includes a transistor control circuit module, which includes a transistor TR801, a resistor R121, and a resistor R122. The base of the transistor TR801 is connected to OUT2, and the emitter and collector of the transistor TR801 are connected to OUT1 after being connected in series with the resistor R122. OUT1 is connected to a 12V power supply through the resistor R121.

[0012] Preferably, the transistor control circuit module further includes a transistor TR802, resistors R124, R125, R142, and diode D1. The base of transistor TR802 is connected to OUT2, the emitter of transistor TR802 is connected to OUT1 after being connected in series with resistor R124, the collector of transistor TR802 is connected to the anode of diode D1 through resistor R125, and the collector of transistor TR802 is connected to one end of resistor R142.

[0013] Preferably, the control circuit C0 further includes a MOSFET control circuit module, which includes a MOSFET TF801, resistors R141 and R123, and a Zener diode DZ801. The gate of the MOSFET TF801 is connected to the collector of the transistor TR801 through resistor R141. The two ends of resistor R123 are connected to the collector of the transistor TR801 and the cathode of diode D1, respectively. The gate and source of the MOSFET TF801 are connected through the Zener diode DZ801. The source of the MOSFET TF801 generates the sub-signal YA1b of the first output oscillator control signal. The drain of the MOSFET TF801 is connected to a 100V power supply.

[0014] Preferably, the MOSFET control circuit module further includes a MOSFET TF802, a Zener diode DZ802, and a diode D2. The gate of the MOSFET TF802 is connected to the collector of the transistor TR802 through a resistor R142. The gate of the MOSFET TF802 is connected to OUT2 and the source of the MOSFET TF802 through the Zener diode DZ802. The drain of the MOSFET TF802 is connected to a 100V power supply through the diode D2. The drain of the MOSFET TF802 generates the sub-signal YA1a of the first output oscillator control signal.

[0015] Preferably, the control circuit C0 further includes a filter circuit and a diode D3. The filter circuit includes a capacitor C1, one end of which is connected to YA1a and the other end is connected to a resistor R123. The diode D3 is connected between YA1b and OUT2, and OUT2 is connected to ground.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model can control four vibrators simultaneously, realize the classification of vibrators, ensure that the material is fully dispersed after passing through the four vibrators, avoid the accumulation phenomenon that easily occurs during the falling process of the material, and improve the accuracy of vibrator control.

[0018] 2. This utility model uses an FPGA module to adjust the duty cycle of the vibrator input signal through a program, thereby controlling the vibrator to slowly and precisely increase the vibration amount.

[0019] 3. The MOSFETs TF801 and TF802 of this utility model have an interlocking function, that is, to prevent TF801 and TF802 from conducting at the same time, to avoid a short circuit between the power supply and ground, and to prevent excessive current from damaging the components.

[0020] 4. This utility model uses four control circuits connected in parallel to realize the parallel connection of four vibrators, and combines an interlock function to ensure that when one vibrator is working, the other vibrators are in a stopped working state, thus saving process costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the system of this utility model;

[0022] Figure 2 This is a schematic diagram of the peripheral digital circuit in this utility model;

[0023] Figure 3 This is a schematic diagram of the control circuit C0 of the internal analog circuit in this utility model;

[0024] Figure 4 The waveform diagram shows the adjustment of the input signal duty cycle by the FPGA module in this utility model. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 A main control board circuit for a grain counting machine that controls a vibrator includes peripheral digital circuitry, internal analog control circuitry, and a power supply module.

[0027] The peripheral digital circuitry includes an FPGA module, a relay interrupt module, and a coupling circuit module. The FPGA module generates a PWM differential modulation signal from the input signal through hardware encoding. The effect of the PWM differential modulation signal is to slowly increase the vibration of the vibrator, preventing damage to the vibrator and thus extending its service life. The relay interrupt module receives the PWM differential modulation signal, amplifies it, and transmits it to the coupling circuit module. The coupling circuit module further amplifies the PWM differential modulation signal and simultaneously isolates interference signals. The coupling circuit module includes two coupling inductors, each outputting two input vibrator control signals. That is, the coupling circuit module outputs four input vibrator controller signals, which are used to provide control signals for subsequent analog circuits.

[0028] The internal analog control circuit includes four control circuits for processing the four input vibrator control signals and outputting four output vibrator control signals. That is, a single control circuit is used to output a single output vibrator control signal, and a single output vibrator control signal is used to control one vibrator. The four control circuits are connected in parallel to realize the simultaneous control of the operation and stop of four vibrators. The single output vibrator control signal includes two sub-signals. Each control circuit can realize an interlock function, thereby controlling that at most one of the two sub-signals remains on, which can control the operation and stop of the corresponding vibrator.

[0029] The power module is used to generate a DC voltage of 5V, 12V, or 100V to power each module.

[0030] Please see Figure 2 The FPGA module uses the EP4CE10E22C8N chip, and the relay interrupt module uses the MC1413D chip. Pin 120 of the EP4CE10E22C8N chip is connected to pin 4 of the MC1413D chip through resistor R10, and pin 121 of the EP4CE10E22C8N chip is connected to pin 3 of the MC1413D chip through resistor R9. Pins 120 and 121 of the EP4CE10E22C8N chip are used to transmit PWM differential modulation signals to the MC1413D chip.

[0031] The coupling inductor uses a TLP521 chip, which has U1C and U2C. Pin 4 of U1C is connected to pin 12 of the MC1413D and is used to receive the control signal Control1. Pin 2 of U2C is connected to pin 11 of the MC1413D and is used to receive the control signal Control2. Pin 8 of U1C is used to transmit the first input vibrator control signal OUT1. Pins 5 and 7 of U1C are connected in parallel for transmitting... The second input vibrator control signal OUT2 is used. Pin 8 of the U2C is used to transmit the third input vibrator control signal OUT4. Pins 5 and 7 of the U2C are connected in parallel to transmit the fourth input vibrator control signal OUT5. The four input vibrator control signals provide control signals for the internal analog control circuit. Pins 1 and 3 of the U1C are connected in parallel with resistors R149 and R150 respectively and then connected to a 5V power supply. Pins 1 and 3 of the U2C are connected in parallel with resistors R120 and R119 respectively and then connected to a 5V power supply.

[0032] The four control circuits of the internal analog control circuit are configured as C0 to C3. Please refer to [link / reference]. Figure 3The diagram below shows the schematic of the control circuit C0 in this invention. C0 includes a transistor control circuit module, which includes a transistor TR801, resistors R121 and R122. In this invention, the transistor TR801 is an NPN transistor. The base of the transistor TR801 is connected to OUT2. The emitter and collector of the transistor TR801 are connected to OUT1 after being connected in series with resistor R122. OUT1 is connected to a 12V power supply through resistor R121. The base voltage of the transistor TR801 can be adjusted through resistors R121 and R122 to control the conduction and cutoff of the transistor TR801.

[0033] Furthermore, the transistor control circuit module also includes a transistor TR802, resistors R124, R125, R142, and diode D1. In this invention, the transistor TR802 is a PNP transistor. The base of the transistor TR802 is connected to OUT2, and the emitter of the transistor TR802 is connected to OUT1 after being connected in series with resistor R124. The collector of the transistor TR802 is connected to the positive terminal of the diode D1 through resistor R125, and the collector of the transistor TR802 is connected to one end of resistor R142. The base voltage of the transistor TR802 can be controlled by resistors R124 and R142. Resistor R125 and diode D1 are used to prevent reverse current, thereby protecting the transistor TR802.

[0034] Furthermore, the control circuit C0 also includes a MOSFET control circuit module, which includes a MOSFET TF801, resistors R141 and R123, and a Zener diode DZ801. In this invention, the MOSFET TF801 is an N-channel MOSFET. The gate of the MOSFET TF801 is connected to the collector of the transistor TR801 through resistor R141. The two ends of resistor R123 are connected to the collector of the transistor TR801 and the cathode of the diode D1, respectively. Resistors R141 and R123 are equal in resistance and are used to limit the MOSFET. The gate current of TF801 can stabilize its conduction state. The gate and source of TF801 are connected by a Zener diode DZ801, which is used to maintain a stable voltage and prevent damage to TF801 from excessive voltage. The source of TF801 generates the first output oscillator control signal sub-signal YA1b. YA1b is the oscillator interface of the control circuit, used to control the operation and stop of the oscillator. The drain of TF801 is connected to a 100V power supply and is driven by the 100V power supply for high voltage switching.

[0035] Furthermore, the MOSFET control circuit module also includes a MOSFET TF802, a Zener diode DZ802, and a diode D2. The MOSFET TF802 is an N-channel MOSFET. The gate of the MOSFET TF802 is connected to the collector of the transistor TR802 through a resistor R142. The gate of the MOSFET TF802 is connected to OUT2 and the source of the MOSFET TF802 through the Zener diode DZ802. The Zener diode is used to maintain a stable voltage and prevent excessive voltage from damaging the MOSFET TF802. The drain of the MOSFET TF802 is connected to a 100V power supply through the diode D2. The drain of the MOSFET TF802 generates the first output oscillator control signal sub-signal YA1a. YA1a is the oscillator interface of the control circuit.

[0036] Furthermore, the control circuit C0 also includes a filter circuit and a diode D3. The filter circuit includes a capacitor C1, which is used to filter out the ripple in the sub-signal YA1b to make the output voltage smoother. One end of the capacitor C1 is connected to YA1a and the other end is connected to a resistor R123. The diode D3 is connected between YA1b and OUT2 to prevent current backflow from damaging the control circuit. OUT2 is connected to ground.

[0037] Furthermore, when the voltage difference between OUT2 and OUT1 exceeds a certain voltage, transistor TR801 turns on, while transistor TR802 turns off. When transistor TR801 turns on, the node voltage connected to the emitter of MOSFET TF801 decreases, thereby controlling the gate voltage of TF801. The gate of TF801 is pulled down to a potential close to ground, causing MOSFET TF801 to turn off. When transistor TR802 turns off, the gate voltage of MOSFET TF802 is pulled down, causing TF802 to turn on. When the voltage difference between OUT1 and OUT2 exceeds a certain voltage, transistor TR802 turns on, while transistor TR801 turns off. When TR801 is off, the gate of MOSFET TF801 is at a higher potential (close to +100V), causing TF801 to conduct. When transistor TR802 is on, the node voltage connected to the emitter of MOSFET TF802 increases, thereby controlling the gate voltage of TF802 and pulling the gate of TF802 high (close to +100V), causing MOSFET TF802 to turn off. In summary, the conduction and shutdown of the two MOSFETs are controlled by controlling the voltages of OUT1 and OUT2. MOSFETs TF801 and TF802 are interlocked, meaning that only one MOSFET can be on at a time when there is an input oscillator control signal, thus controlling the operation and shutdown of the oscillator.

[0038] Please see Figure 4The waveform diagram shows the FPGA module adjusting the duty cycle of the input signal in this utility model. The FPGA module achieves different control effects for the input signal by adjusting the duty cycle of the input signal. The FPGA module controls the vibrator to slowly and precisely increase the vibration amount by adjusting the duty cycle of the input signal through the program.

[0039] The working principle of the control circuit in this embodiment is explained below:

[0040] Please see Figure 1-4 The FPGA module generates a PWM differential modulation signal from the input signal through hardware encoding. The MC1413D chip receives the PWM differential modulation signal, amplifies it, and transmits it to two TLP521 chips. The TLP521 chips further amplify the PWM differential modulation signal and isolate interference signals. The two TLP521 chips output four input vibrator controller signals. Four control circuits output four output vibrator control signals. The four control circuits are connected in parallel to realize the simultaneous control of the operation and stop of four vibrators. The power supply module generates a 5V, 12V, or 100V DC voltage to power each module.

[0041] Please see Figure 3 The two MOSFETs TF801 and TF802 are interlocked to prevent them from conducting simultaneously. If both MOSFETs conduct at the same time, it may cause a short circuit between the power supply and ground, resulting in excessive current and damage to the components. When MOSFET TF801 is on and MOSFET TF802 is off, current can flow into the oscillator through the sub-signal YA1b. At this time, the oscillator is powered on and starts working. When MOSFET TF801 is off and MOSFET TF802 is on, the current path is cut off, and the oscillator stops working, ensuring that the current flows to the oscillator through only one path.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circuit for controlling a vibrator on the main control board of a grain counting machine, characterized in that, Includes peripheral digital circuits, internal analog control circuits, and a power supply module; The peripheral digital circuit includes an FPGA module, a relay interrupt module, and a coupling circuit module. The FPGA module is used to generate a PWM differential modulation signal from the input signal through hardware encoding. The relay interrupt module receives the PWM differential modulation signal, amplifies it, and transmits it to the coupling circuit module. The coupling circuit module further amplifies the PWM differential modulation signal and isolates interference signals. The coupling circuit module includes two coupling inductors, and each coupling inductor outputs two input vibrator control signals, that is, the coupling circuit module outputs four input vibrator controller signals. The internal analog control circuit includes four control circuits for processing the four input vibrator control signals and outputting four output vibrator control signals. Each control circuit is used to output a single output vibrator control signal. The four control circuits are connected in parallel to simultaneously control the operation and stop of the four vibrators. Each single output vibrator control signal includes two sub-signals. The control circuit can implement an interlock function to ensure that at most one of the two sub-signals remains on. The power module is used to generate a DC voltage of 5V, 12V, or 100V to power each module.

2. The main control board circuit for controlling the vibrator of a counting machine according to claim 1, characterized in that: The FPGA module uses an EP4CE10E22C8N chip, and the relay interrupt module uses an MC1413D chip. Pin 120 of the EP4CE10E22C8N chip is connected to pin 4 of the MC1413D chip through resistor R10, and pin 121 of the EP4CE10E22C8N chip is connected to pin 3 of the MC1413D chip through resistor R9. Pins 120 and 121 of the EP4CE10E22C8N chip are used to transmit PWM differential modulation signals.

3. The main control board circuit for controlling the vibrator of a counting machine according to claim 2, characterized in that: The coupling inductor uses a TLP521 chip, which has U1C and U2C. Pin 4 of U1C is connected to pin 12 of the MC1413D and is used to receive the control signal Control1. Pin 2 of U2C is connected to pin 11 of the MC1413D and is used to receive the control signal Control2. Pin 8 of U1C is used to transmit the first input vibrator control signal OUT1. Pins 5 and 7 of U1C are connected in parallel to transmit the second input vibrator control signal OUT2. Pin 8 of U2C is used to transmit the third input vibrator control signal OUT4. Pins 5 and 7 of U2C are connected in parallel to transmit the fourth input vibrator control signal OUT5.

4. The main control board circuit for controlling the vibrator of a grain counting machine according to claim 3, characterized in that: The four control circuits are set as C0~C3. Control circuit C0 includes a transistor control circuit module, which includes a transistor TR801, a resistor R121, and a resistor R122. The base of the transistor TR801 is connected to OUT2, and the emitter and collector of the transistor TR801 are connected to OUT1 after being connected in series with the resistor R122. OUT1 is connected to a 12V power supply through the resistor R121.

5. The main control board circuit for controlling the vibrator of a counting machine according to claim 4, characterized in that: The transistor control circuit module also includes a transistor TR802, resistors R124, R125, R142, and diode D1. The base of transistor TR802 is connected to OUT2, the emitter of transistor TR802 is connected to OUT1 after being connected in series with resistor R124, the collector of transistor TR802 is connected to the anode of diode D1 through resistor R125, and the collector of transistor TR802 is connected to one end of resistor R142.

6. The main control board circuit for controlling the vibrator of a counting machine according to claim 5, characterized in that: The control circuit C0 further includes a MOSFET control circuit module, which includes a MOSFET TF801, resistors R141 and R123, and a Zener diode DZ801. The gate of the MOSFET TF801 is connected to the collector of the transistor TR801 through resistor R141. The two ends of resistor R123 are connected to the collector of the transistor TR801 and the cathode of diode D1, respectively. The gate and source of the MOSFET TF801 are connected through the Zener diode DZ801. The source of the MOSFET TF801 generates the first output oscillator control signal sub-signal YA1b. The drain of the MOSFET TF801 is connected to a 100V power supply.

7. The main control board circuit for controlling the vibrator of a counting machine according to claim 6, characterized in that: The MOSFET control circuit module also includes a MOSFET TF802, a Zener diode DZ802, and a diode D2. The gate of the MOSFET TF802 is connected to the collector of the transistor TR802 through a resistor R142. The gate of the MOSFET TF802 is connected to OUT2 and the source of the MOSFET TF802 through the Zener diode DZ802. The drain of the MOSFET TF802 is connected to a 100V power supply through the diode D2. The drain of the MOSFET TF802 generates the sub-signal YA1a of the first output oscillator control signal.

8. The main control board circuit for controlling the vibrator of a counting machine according to claim 7, characterized in that: The control circuit C0 also includes a filter circuit and a diode D3. The filter circuit includes a capacitor C1, one end of which is connected to YA1a and the other end is connected to a resistor R123. The diode D3 is connected between YA1b and OUT2, and OUT2 is connected to ground.

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