Power supply system for glue infrared detection device of cigarette making machine

Abstract

The utility model relates to a power supply system used for a glue infrared detection device of a cigarette making machine. The power supply system comprises a rectification filter circuit, a voltage stabilizing circuit, a chopper circuit, a current detection circuit, a pulse width adjusting circuit and a CPU processor. The input end of the rectification filter circuit is connected with a power supply, the output end of the rectification filter circuit is connected with the input end of the voltage stabilizing circuit, the output end of the voltage stabilizing circuit is connected with the input end of the chopper circuit, the output end of the chopper circuit is connected with the input end of the current detection circuit, and the output end of the current detection circuit is connected with the CPU. The input end of the pulse width adjusting circuit is connected with the CPU processor, the output end of the pulse width adjusting circuit is connected with the chopper circuit, the chopper circuit controlled by double field-effect tubes is adopted on the power supply system, two paths of PWM generated by the pulse width adjusting circuit are used for controlling the on-off of the chopper circuit, ripple waves are obviously reduced when two paths of current are superposed and flow to a load, and meanwhile, by continuously changing parameters, the power supply system can be used for controlling the on-off of the chopper circuit. The output speed and precision are optimized, the system output precision is high, the stability is good, and the operation is simple.

Description

Technical Field

[0001] The utility model discloses a power supply system, belongs to the technical field of glue detection devices for cigarette making machines, and specifically relates to a power supply system for a glue infrared detection device for cigarette making machines. Background Art

[0002] Cigarette machine glue infrared detection is a commonly used industrial detection method to detect the glue application in cigarette making machines. This detection method uses infrared sensor technology to detect the glue application and ensure that each cigarette has the correct glue application during the production process.

[0003] Specifically, infrared detection of glue in cigarette making machines usually includes the following steps:

[0004] Install infrared sensors: Install infrared sensors at appropriate locations on the production line of the cigarette making machine so that the application of glue can be accurately detected.

[0005] Infrared signal transmission and reception: The infrared sensor transmits infrared signals and receives the reflected signals. If the glue is applied correctly, the glue will absorb or reflect the infrared light, allowing the sensor to receive the signal; if the glue is not applied enough or there is a problem, the sensor will not receive enough signals.

[0006] Detection and feedback: Based on the signals received by the sensor, the system will conduct corresponding detection and judgment. If it detects that the glue is not applied enough or there is a problem, the system may trigger an alarm or shut down the machine so that it can be handled in time and avoid quality problems.

[0007] By using infrared sensors for glue smear detection, real-time monitoring can be achieved on automated production lines, improving production efficiency and product quality while reducing waste and losses caused by glue problems. This technology is widely used in industrial production such as cigarettes and plays an important role in improving production quality and efficiency.

[0008] In the prior art, the infrared detection device for glue in cigarette making machines is mostly powered by a constant current source LPA. A constant current source is a power source that can output a constant current. Common constant current sources can be divided into a switching constant current source and a linear constant current source. The linear constant current circuit composed of an operational amplifier and a transistor has good stability, but low power efficiency, because the detection device needs to be switched frequently, and frequent switching will greatly increase the ripple component of the DC power supply output. The presence of ripple will reduce the efficiency of the constant current source, and may also break down the capacitive load, or even cause surge current to burn out the appliance. Utility Model Content

[0009] Purpose of the utility model: to provide a power supply system for a cigarette making machine glue infrared detection device to solve the above-mentioned problems.

[0010] Technical solution: A power supply system for a cigarette machine glue infrared detection device, including: a rectifier filter circuit, a voltage regulator circuit, a chopper circuit, a current detection circuit, a pulse width adjustment circuit and a CPU processor;

[0011] The input end of the rectifier and filter circuit is connected to a power supply, the output end is connected to the input end of the voltage stabilizing circuit and inputs a 5V voltage, the output end of the voltage stabilizing circuit is connected to the input end of the chopper circuit, the output end of the chopper circuit is connected to the input end of the current detection circuit, the output end of the current detection circuit is connected to the CPU processor, the input end of the pulse width adjustment circuit is connected to the CPU processor, and the output end is connected to the chopper circuit.

[0012] In a further embodiment, the rectification and filtering circuit is composed of a rectifier bridge and a filter.

[0013] In a further embodiment, the voltage stabilizing circuit includes: capacitor C15, capacitor C16, resistor R6, capacitor C17, capacitor C18, and voltage stabilizer U5;

[0014] The input end of the voltage regulator U5 is simultaneously connected to one end of the capacitor C15 and one end of the capacitor C16 and inputs a 5V voltage, the other end of the capacitor C15 and the other end of the capacitor C16 are grounded, the output end of the voltage regulator U5 is simultaneously connected to one end of the resistor R6, one end of the capacitor C17 and one end of the capacitor C18, the ground end of the voltage regulator U5 is simultaneously connected to the other end of the resistor R6, the other end of the capacitor C17 and the other end of the capacitor C18 and outputs a voltage.

[0015] In a further embodiment, the chopper circuit includes: field effect transistor PWM1, field effect transistor PWM2, capacitor C1, capacitor C3, capacitor C4, diode D1, inductor L1, inductor L2, resistor RL, capacitor C2, diode D2, resistor RS;

[0016] The source of the field effect transistor PWM1 is simultaneously connected to the source of the field effect transistor PWM2, one end of the capacitor C3 and one end of the capacitor C4, the drain of the field effect transistor PWM1 is simultaneously connected to one end of the litigation inductor L1 and the cathode of the diode D1, one end of the capacitor C1 is simultaneously connected to the other end of the inductor L1, one end of the resistor RL, one end of the capacitor C2 and one end of the inductor L2, the other end of the capacitor C3 is connected to the other end of the capacitor C4 and is grounded, the drain of the field effect transistor PWM2 is simultaneously connected to the other end of the inductor L2 and the cathode of the diode D2, the anode of the diode D1 is connected to the other end of the capacitor C1 and is grounded, the anode of the diode D2 is connected to the other end of the capacitor C2 and is grounded, the other end of the resistor RL is connected to one end of the resistor RS, and the other end of the resistor RS is grounded.

[0017] In a further embodiment, the pulse width adjustment circuit is formed by a pulse width adjuster.

[0018] In a further embodiment, the current detection circuit detects the output current of the chopper circuit and outputs a signal to a CPU processor, and the CPU processor controls a pulse width adjustment circuit to adjust the current of the chopper circuit.

[0019] Beneficial effect: The utility model discloses a power supply system, which belongs to the technical field of glue detection devices for cigarette making machines, and specifically relates to a power supply system for infrared glue detection devices for cigarette making machines, comprising: a rectifier and filter circuit, a voltage stabilizing circuit, a chopper circuit, a current detection circuit, a pulse width adjustment circuit and a CPU processor; the input end of the rectifier and filter circuit is connected to a power supply, the output end is connected to the input end of the voltage stabilizing circuit and inputs a 5V voltage, the output end of the voltage stabilizing circuit is connected to the input end of the chopper circuit, the output end of the chopper circuit is connected to the input end of the current detection circuit, the output end of the current detection circuit is connected to the CPU processor, the input end of the pulse width adjustment circuit is connected to the CPU processor, and the output end is connected to the chopper circuit. The power supply system of the utility model adopts a chopper circuit controlled by dual field effect tubes, and uses two PWMs generated by a pulse width modulation circuit to control the on and off of the chopper circuit. When the two currents are superimposed and flow to the load, the ripple is significantly reduced. At the same time, by continuously changing parameters, the output speed and accuracy are optimized. The system has high output accuracy, good stability, and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the utility model.

[0021] Figure 2 It is a schematic diagram of a voltage stabilizing circuit of the utility model.

[0022] Figure 3 It is a schematic diagram of a chopper circuit of the utility model. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, 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 connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] A power supply system for an infrared detection device for glue in a cigarette making machine, such as Figure 1 As shown, it includes: a rectifier and filter circuit, a voltage stabilizing circuit, a chopper circuit, a current detection circuit, a pulse width adjustment circuit and a CPU processor;

[0027] The input end of the rectifier and filter circuit is connected to a power supply, the output end is connected to the input end of the voltage stabilizing circuit and inputs a 5V voltage, the output end of the voltage stabilizing circuit is connected to the input end of the chopper circuit, the output end of the chopper circuit is connected to the input end of the current detection circuit, the output end of the current detection circuit is connected to the CPU processor, the input end of the pulse width adjustment circuit is connected to the CPU processor, and the output end is connected to the chopper circuit.

[0028] In one embodiment, Figure 1As shown, the rectification and filtering circuit is composed of a rectifier bridge and a filter.

[0029] In one embodiment, Figure 2 As shown, the voltage stabilizing circuit includes: capacitor C15, capacitor C16, resistor R6, capacitor C17, capacitor C18, and voltage stabilizer U5;

[0030] The input end of the voltage regulator U5 is simultaneously connected to one end of the capacitor C15 and one end of the capacitor C16 and inputs a 5V voltage, the other end of the capacitor C15 and the other end of the capacitor C16 are grounded, the output end of the voltage regulator U5 is simultaneously connected to one end of the resistor R6, one end of the capacitor C17 and one end of the capacitor C18, the ground end of the voltage regulator U5 is simultaneously connected to the other end of the resistor R6, the other end of the capacitor C17 and the other end of the capacitor C18 and outputs a voltage.

[0031] In one embodiment, Figure 3 As shown, the chopper circuit includes: field effect transistor PWM1, field effect transistor PWM2, capacitor C1, capacitor C3, capacitor C4, diode D1, inductor L1, inductor L2, resistor RL, capacitor C2, diode D2, resistor RS;

[0032] The source of the field effect transistor PWM1 is simultaneously connected to the source of the field effect transistor PWM2, one end of the capacitor C3 and one end of the capacitor C4, the drain of the field effect transistor PWM1 is simultaneously connected to one end of the litigation inductor L1 and the cathode of the diode D1, one end of the capacitor C1 is simultaneously connected to the other end of the inductor L1, one end of the resistor RL, one end of the capacitor C2 and one end of the inductor L2, the other end of the capacitor C3 is connected to the other end of the capacitor C4 and is grounded, the drain of the field effect transistor PWM2 is simultaneously connected to the other end of the inductor L2 and the cathode of the diode D2, the anode of the diode D1 is connected to the other end of the capacitor C1 and is grounded, the anode of the diode D2 is connected to the other end of the capacitor C2 and is grounded, the other end of the resistor RL is connected to one end of the resistor RS, and the other end of the resistor RS is grounded.

[0033] Specifically, the chopper circuit PWM changes the current in the chopper circuit by controlling the on and off of the field effect tube. The chopper circuit PWM controls the on and off of the field effect tube through high and low levels, so that the current in the circuit forms a pulsating current in a continuous time dimension. Since the PWM frequency is very high, the change of the current can be approximately regarded as linear, that is, the current flowing through the load is approximately a triangular waveform.

[0034] More specifically, when the switching frequency is constant, in order to make the current close to linearity and thus reduce the ripple, the inductance values ​​of the inductor L1 and the inductor L2 should be increased as much as possible.

[0035] More specifically, the field effect transistor PWM1 and the field effect transistor PWM2 have the same duty cycle and a phase difference of 180°, which respectively control the on and off of the two chopper circuits. The two groups of circuits generate currents with the same waveform and completely opposite changes. After being superimposed at the load end, the various order ripples will cancel each other out.

[0036] In one embodiment, Figure 1 As shown, the pulse width adjustment circuit is composed of a pulse width adjuster.

[0037] Specifically, the pulse width regulator uses a pulse width adjustment chip with a signal of SG3525 to achieve the generation of two PWMs. When there is an input voltage at the positive input terminal, the pulse width adjustment chip will generate two PWM waves with a phase difference of 180° and the same duty cycle; the PWM generated by the pulse width adjustment chip controls the on and off of the field effect tube PWM1 and the field effect tube PWM2 through high and low level changes. At the same time, the pulse width adjustment chip compares the reverse input terminal voltage with the positive input terminal, and automatically adjusts the duty cycle of the generated PWM wave to control the on and off time of the field effect tube PWM1 and the field effect tube PWM2, thereby controlling the output of the constant current source.

[0038] In one embodiment, Figure 1 As shown, the current detection circuit detects the output current of the chopper circuit and outputs a signal to the CPU processor, and the CPU processor controls the pulse width adjustment circuit to adjust the current of the chopper circuit.

[0039] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A power supply system for a cigarette making machine glue infrared detection device, characterized in that: The power supply system includes: a rectifier filter circuit, a voltage stabilizing circuit, a chopper circuit, a current detection circuit, a pulse width adjustment circuit and a CPU processor; The input end of the rectifier and filter circuit is connected to a power supply, the output end is connected to the input end of the voltage stabilizing circuit and inputs a 5V voltage, the output end of the voltage stabilizing circuit is connected to the input end of the chopper circuit, the output end of the chopper circuit is connected to the input end of the current detection circuit, the output end of the current detection circuit is connected to the CPU processor, the input end of the pulse width adjustment circuit is connected to the CPU processor, and the output end is connected to the chopper circuit.

2. The power supply system for the infrared detection device for glue in cigarette making machines according to claim 1, characterized in that: The rectification and filtering circuit is composed of a rectification bridge and a filter.

3. The power supply system for the infrared detection device for glue in cigarette making machines according to claim 1, characterized in that: The voltage stabilizing circuit includes: capacitor C15, capacitor C16, resistor R6, capacitor C17, capacitor C18, and voltage stabilizer U5; The input end of the voltage regulator U5 is simultaneously connected to one end of the capacitor C15 and one end of the capacitor C16 and inputs a 5V voltage, the other end of the capacitor C15 and the other end of the capacitor C16 are grounded, the output end of the voltage regulator U5 is simultaneously connected to one end of the resistor R6, one end of the capacitor C17 and one end of the capacitor C18, the ground end of the voltage regulator U5 is simultaneously connected to the other end of the resistor R6, the other end of the capacitor C17 and the other end of the capacitor C18 and outputs a voltage.

4. The power supply system for the infrared detection device for glue in cigarette making machines according to claim 1, characterized in that: The chopper circuit includes: a field effect transistor PWM1, a field effect transistor PWM2, a capacitor C1, a capacitor C3, a capacitor C4, a diode D1, an inductor L1, an inductor L2, a resistor RL, a capacitor C2, a diode D2, and a resistor RS; The source of the field effect transistor PWM1 is simultaneously connected to the source of the field effect transistor PWM2, one end of the capacitor C3 and one end of the capacitor C4, the drain of the field effect transistor PWM1 is simultaneously connected to one end of the litigation inductor L1 and the cathode of the diode D1, one end of the capacitor C1 is simultaneously connected to the other end of the inductor L1, one end of the resistor RL, one end of the capacitor C2 and one end of the inductor L2, the other end of the capacitor C3 is connected to the other end of the capacitor C4 and is grounded, the drain of the field effect transistor PWM2 is simultaneously connected to the other end of the inductor L2 and the cathode of the diode D2, the anode of the diode D1 is connected to the other end of the capacitor C1 and is grounded, the anode of the diode D2 is connected to the other end of the capacitor C2 and is grounded, the other end of the resistor RL is connected to one end of the resistor RS, and the other end of the resistor RS is grounded.

5. The power supply system for the infrared detection device for glue in cigarette making machines according to claim 1, characterized in that: The pulse width adjustment circuit is composed of a pulse width adjuster.

6. A power supply system for a cigarette making machine glue infrared detection device according to claim 1, characterized in that: The current detection circuit detects the output current of the chopper circuit and outputs a signal to a CPU processor, and the CPU processor controls a pulse width adjustment circuit to adjust the current of the chopper circuit.

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