Temperature control system for glue infrared detection device of cigarette making machine

Abstract

The utility model discloses a temperature control system, belongs to the technical field of cigarette making machine glue detection devices, and particularly relates to a temperature control system for a cigarette making machine glue infrared detection device, which comprises a temperature detection circuit, a power supply circuit, a PID (Proportion Integration Differentiation) control circuit, a temperature self-tuning circuit and a temperature control circuit, the power supply circuit is connected with the temperature detection circuit, the PID control circuit, the temperature self-tuning circuit and the temperature control circuit to provide working voltage for the temperature detection circuit, the PID control circuit, the temperature self-tuning circuit and the temperature control circuit; the output end of the temperature detection circuit is connected with the input end of the PID control circuit and the input end of the temperature self-tuning circuit, the output end of the temperature self-tuning circuit is connected with the input end of the temperature control circuit, and the output end of the PID control circuit is connected with the temperature self-tuning circuit to input a temperature instruction to the temperature self-tuning circuit. According to the utility model, the influence of environment temperature change on the infrared detector can be well eliminated, and the stability and precision of the infrared detector can be better ensured.

Description

Technical Field

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

[0002] In the production process of cigarettes, the amount of gluing on the tipping paper directly affects the quality of the final product. Nowadays, many cigarette manufacturers widen the tipping paper. In this case, it will become more difficult and unreliable to detect the cigarette dilution failure caused by poor gluing on the tipping paper completely by the CID part of the cigarette machine. The dilution quality defects of cigarettes caused by poor gluing on the tipping paper account for a large proportion of the entire dilution quality defects. Therefore, improving the gluing quality of the tipping paper of the cigarette machine and timely removing the unqualified cigarettes are of great practical significance for improving the qualified rate of the finished products of the cigarette machine.

[0003] Some detection devices in the prior art use infrared detection, which is a device that is very sensitive to temperature changes. Since its detection efficiency decreases with increasing temperature, ensuring the constant temperature of the infrared detector has an important impact on the stability and resolution of the detection signal. Utility Model Content

[0004] Purpose of the utility model: to provide a temperature control system for a cigarette making machine glue infrared detection device to solve the above-mentioned problems.

[0005] Technical solution: A temperature control system for a cigarette machine glue infrared detection device, comprising: the temperature control system comprises: a temperature detection circuit, a power supply circuit, a PID control circuit, a temperature self-tuning circuit and a temperature control circuit;

[0006] The power supply circuit is connected to the temperature detection circuit, the PID control circuit, the temperature self-tuning circuit and the temperature control circuit to provide working voltage therefor;

[0007] The output end of the temperature detection circuit is connected to the input end of the PID control circuit and the input end of the temperature self-tuning circuit, the output end of the temperature self-tuning circuit is connected to the input end of the temperature control circuit, and the output end of the PID control circuit is connected to the temperature self-tuning circuit for temperature command input.

[0008] In a further embodiment, the temperature detection circuit is composed of a temperature sensor; the temperature sensor has a built-in analog-to-digital conversion branch to convert the detected analog signal into a digital signal for output.

[0009] In a further embodiment, the power supply circuit is composed of a buck controller and a voltage regulator to control the input voltage.

[0010] In a further embodiment, the PID control circuit is composed of a PID controller, the collected temperature value is used to obtain a temperature variable signal through the PID controller, and a control instruction is issued to the temperature self-tuning circuit according to the variable signal.

[0011] In a further embodiment, the temperature self-tuning circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R5, a resistor R6 and an operational amplifier U1;

[0012] The non-inverting input terminal of the operational amplifier U1 is simultaneously connected to one end of the resistor R3 and one end of the resistor R4, the inverting input terminal of the operational amplifier U1 is simultaneously connected to one end of the resistor R5 and one end of the resistor R1 and inputs a signal, one end of the resistor R2 is simultaneously connected to the other end of the resistor R1 and the other end of the resistor R3, the other end of the resistor R2 inputs a working voltage, the other end of the resistor R4 is connected to one end of the resistor R6 and inputs a signal, the positive voltage terminal of the operational amplifier U1 inputs a positive voltage, the negative voltage terminal is connected to the other end of the resistor R6 and inputs a negative voltage, and the output terminal of the amplifier U1 is connected to the other end of the resistor R5 and outputs a signal.

[0013] In a further embodiment, the temperature control circuit includes a resistor R7, a transistor Q1, a transistor Q2, a transistor Q3, a resistor R8, a resistor R9, a resistor R10, a fuse F1, and a thermostat;

[0014] Pin 3 of the transistor Q1 is simultaneously connected to one end of the resistor R7 and one end of the resistor R8, and a signal is input to the other end of the resistor R7. Pin 1 of the transistor Q1 is connected to pin 3 of the transistor Q2, and pin 2 of the transistor Q1 is simultaneously connected to pin 3 of the transistor Q3 and the output end of the temperature controller. Pin 2 of the transistor Q3 is simultaneously connected to pin 2 of the transistor Q1 and one end of the resistor R10 and is connected to the output end of the temperature controller and inputs a working voltage VCC. The other end of the resistor R10 is connected to one end of the fuse F1, and the other end of the fuse F1 is connected to the power supply voltage input end of the temperature controller. Pin 1 of the transistor Q3 is simultaneously connected to the other end of the resistor R8 and one end of the resistor R9, pin 1 of the transistor Q2 is connected to the thermostat, and the other end of the resistor R9 is connected to the thermostat.

[0015] Beneficial effects: The utility model discloses a temperature control system, which belongs to the technical field of glue detection devices for cigarette making machines, and specifically relates to a temperature control system for an infrared glue detection device for a cigarette making machine, comprising: a temperature detection circuit, a power supply circuit, a PID control circuit, a temperature self-tuning circuit and a temperature control circuit; the power supply circuit is connected to the temperature detection circuit, the PID control circuit, the temperature self-tuning circuit and the temperature control circuit to provide them with a working voltage; the output end of the temperature detection circuit is connected to the input end of the PID control circuit and the input end of the temperature self-tuning circuit, the output end of the temperature self-tuning circuit is connected to the input end of the temperature control circuit, and the output end of the PID control circuit is connected to the temperature self-tuning circuit to input a temperature instruction. The utility model can well eliminate the influence of ambient temperature changes on the infrared detector, and can better ensure the stability and accuracy of the infrared detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model.

[0017] Figure 2 The utility model is a schematic diagram of a temperature self-adjusting circuit.

[0018] Figure 3 It is a schematic diagram of a temperature control circuit of the utility model. DETAILED DESCRIPTION

[0019] 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.

[0020] 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.

[0021] 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.

[0022] A temperature control system for an infrared detection device for glue in a cigarette making machine, such as Figure 1 As shown, the temperature control system includes: a temperature detection circuit, a power supply circuit, a PID control circuit, a temperature self-tuning circuit and a temperature control circuit;

[0023] The power supply circuit is connected to the temperature detection circuit, the PID control circuit, the temperature self-tuning circuit and the temperature control circuit to provide working voltage therefor;

[0024] The output end of the temperature detection circuit is connected to the input end of the PID control circuit and the input end of the temperature self-tuning circuit, the output end of the temperature self-tuning circuit is connected to the input end of the temperature control circuit, and the output end of the PID control circuit is connected to the temperature self-tuning circuit for temperature command input.

[0025] In one embodiment, Figure 1 As shown, the temperature detection circuit is composed of a temperature sensor; the temperature sensor has a built-in analog-to-digital conversion branch to convert the detected analog signal into a digital signal for output.

[0026] In one embodiment, Figure 1 As shown, the power supply circuit is composed of a buck controller and a voltage regulator to control the input voltage.

[0027] Specifically, the buck controller adopts TI's LM25145, with external inductor and MOS tube. The buck controller includes configurable soft start, open-drain power supply normal monitoring for fault reporting and output monitoring, monotonic start-up to pre-biased load, integrated VCC bias power supply regulator and bootstrap diode, external power supply tracking, precision enable input with hysteresis for adjustable line undervoltage lockout (UVLO), discontinuous mode overload protection and thermal shutdown protection with automatic recovery. Once an abnormality occurs, the buck controller can cut off the output in time to protect the safety of the load.

[0028] In one embodiment, Figure 1As shown, the PID control circuit is composed of a PID controller. The collected temperature value is substituted into the PID formula to obtain the control variable result. The temperature variable signal is obtained through the PID controller, and a control instruction is issued to the temperature self-tuning circuit according to the variable signal.

[0029] In one embodiment, Figure 2 As shown, the temperature self-tuning circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R5, a resistor R6 and an operational amplifier U1;

[0030] The non-inverting input terminal of the operational amplifier U1 is simultaneously connected to one end of the resistor R3 and one end of the resistor R4, the inverting input terminal of the operational amplifier U1 is simultaneously connected to one end of the resistor R5 and one end of the resistor R1 and inputs a signal, one end of the resistor R2 is simultaneously connected to the other end of the resistor R1 and the other end of the resistor R3, the other end of the resistor R2 inputs a working voltage, the other end of the resistor R4 is connected to one end of the resistor R6 and inputs a signal, the positive voltage terminal of the operational amplifier U1 inputs a positive voltage, the negative voltage terminal is connected to the other end of the resistor R6 and inputs a negative voltage, and the output terminal of the amplifier U1 is connected to the other end of the resistor R5 and outputs a signal.

[0031] Specifically, the temperature self-tuning circuit inputs the detection signal from the temperature sensor and introduces the signal into the bridge resistor circuit, wherein the resistor R4 is a temperature matching resistor, that is, the resistance value is the resistance value of the set temperature, and the resistor R5 is the amplification resistor of the operational amplifier U1, which is used to control the control accuracy of the temperature control circuit. When the detected temperature is greater than or less than the set temperature, the input deviation of the operational amplifier U1 is positive, and a positive amplified voltage is output, otherwise, a negative voltage is output.

[0032] In one embodiment, Figure 3 As shown, the temperature control circuit includes a resistor R7, a transistor Q1, a transistor Q2, a transistor Q3, a resistor R8, a resistor R9, a resistor R10, a fuse F1, and a temperature controller;

[0033] Pin 3 of the transistor Q1 is simultaneously connected to one end of the resistor R7 and one end of the resistor R8, and a signal is input to the other end of the resistor R7. Pin 1 of the transistor Q1 is connected to pin 3 of the transistor Q2, and pin 2 of the transistor Q1 is simultaneously connected to pin 3 of the transistor Q3 and the output end of the temperature controller. Pin 2 of the transistor Q3 is simultaneously connected to pin 2 of the transistor Q1 and one end of the resistor R10 and is connected to the output end of the temperature controller and inputs a working voltage VCC. The other end of the resistor R10 is connected to one end of the fuse F1, and the other end of the fuse F1 is connected to the power supply voltage input end of the temperature controller. Pin 1 of the transistor Q3 is simultaneously connected to the other end of the resistor R8 and one end of the resistor R9, pin 1 of the transistor Q2 is connected to the thermostat, and the other end of the resistor R9 is connected to the thermostat.

[0034] like Figure 3 As shown, in the temperature control circuit, resistor R10 is a current limiting protection resistor, resistor R7 and resistor R8 constitute a control voltage feedback circuit, transistor Q1, transistor Q2 and transistor Q3 constitute a cooling voltage output buffer, and resistor R9 is a matching resistor. When the front-end operational amplifier U1 outputs a positive voltage, transistor Q1 is turned on, and transistor Q2 and transistor Q3 constitute a parallel circuit, that is, resistor R9 and the thermostat are in a parallel state. At this time, resistor R9 is a power resistor, and its resistance value matches the resistance value of the thermostat. Since the resistance value of R9 is similar to that of the thermostat, the current of the thermostat is measured by testing the voltage across the resistor R9, and the thermostat is powered on to work and perform temperature control; when the front-end operational amplifier U1 outputs a negative voltage, transistor Q1 is turned off, and no current passes through the thermostat.

[0035] 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 temperature control system for a cigarette making machine glue infrared detection device, characterized in that: The temperature control system comprises: a temperature detection circuit, a power supply circuit, a PID control circuit, a temperature self-tuning circuit and a temperature control circuit; The power supply circuit is connected to the temperature detection circuit, the PID control circuit, the temperature self-tuning circuit and the temperature control circuit to provide working voltage therefor; The output end of the temperature detection circuit is connected to the input end of the PID control circuit and the input end of the temperature self-tuning circuit, the output end of the temperature self-tuning circuit is connected to the input end of the temperature control circuit, and the output end of the PID control circuit is connected to the temperature self-tuning circuit for temperature command input.

2. The temperature control system for the infrared detection device of glue for cigarette making machine according to claim 1, characterized in that: The temperature detection circuit is composed of a temperature sensor; the temperature sensor has a built-in analog-to-digital conversion branch to convert the detected analog signal into a digital signal for output.

3. The temperature control system for the infrared detection device of glue for cigarette making machine according to claim 1, characterized in that: The power supply circuit is composed of a step-down controller and a voltage stabilizer, and controls the input voltage.

4. The temperature control system for the infrared detection device of glue for cigarette making machine according to claim 1, characterized in that: The PID control circuit is composed of a PID controller, which obtains a temperature variable signal through the PID controller using the collected temperature value, and sends a control instruction to the temperature self-tuning circuit according to the variable signal.

5. The temperature control system for the infrared detection device of glue for cigarette making machine according to claim 1, characterized in that: The temperature self-tuning circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R5, a resistor R6 and an operational amplifier U1; The non-inverting input terminal of the operational amplifier U1 is simultaneously connected to one end of the resistor R3 and one end of the resistor R4, the inverting input terminal of the operational amplifier U1 is simultaneously connected to one end of the resistor R5 and one end of the resistor R1 and inputs a signal, one end of the resistor R2 is simultaneously connected to the other end of the resistor R1 and the other end of the resistor R3, the other end of the resistor R2 inputs a working voltage, the other end of the resistor R4 is connected to one end of the resistor R6 and inputs a signal, the positive voltage terminal of the operational amplifier U1 inputs a positive voltage, the negative voltage terminal is connected to the other end of the resistor R6 and inputs a negative voltage, and the output terminal of the amplifier U1 is connected to the other end of the resistor R5 and outputs a signal.

6. The temperature control system for the infrared detection device of glue for cigarette making machine according to claim 1, characterized in that: The temperature control circuit includes a resistor R7, a transistor Q1, a transistor Q2, a transistor Q3, a resistor R8, a resistor R9, a resistor R10, a fuse F1, and a temperature controller; Pin 3 of the transistor Q1 is simultaneously connected to one end of the resistor R7 and one end of the resistor R8, and a signal is input to the other end of the resistor R7. Pin 1 of the transistor Q1 is connected to pin 3 of the transistor Q2, and pin 2 of the transistor Q1 is simultaneously connected to pin 3 of the transistor Q3 and the output end of the temperature controller. Pin 2 of the transistor Q3 is simultaneously connected to pin 2 of the transistor Q1 and one end of the resistor R10 and is connected to the output end of the temperature controller and inputs a working voltage VCC. The other end of the resistor R10 is connected to one end of the fuse F1, and the other end of the fuse F1 is connected to the power supply voltage input end of the temperature controller. Pin 1 of the transistor Q3 is simultaneously connected to the other end of the resistor R8 and one end of the resistor R9, pin 1 of the transistor Q2 is connected to the thermostat, and the other end of the resistor R9 is connected to the thermostat.

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