CN209898269U

CN209898269U - Control system for flue-cured tobacco humidification

Info

Publication number: CN209898269U
Application number: CN201920303681.7U
Authority: CN
Inventors: 朱银峰; 丁燕芳; 李耀; 朱景伟; 吴新文; 张昭; 刘思宇; 陈志刚; 陈文静; 王炳辛; 夏同化; 孙永申
Original assignee: Tobacco Research Institute Henan Academy Of Agricultural Sciences
Current assignee: Tobacco Research Institute Henan Academy Of Agricultural Sciences
Priority date: 2019-03-11
Filing date: 2019-03-11
Publication date: 2020-01-07
Anticipated expiration: 2029-03-11

Abstract

The utility model discloses a control system for flue-cured tobacco humidification, motorised valve, ultrasonic nebulizer are controlled by control circuit, and control circuit includes signal detection circuit, signal processing circuit, PWM converting circuit that connect gradually; the problem that the atomization amount of the ultrasonic atomizer and the water inlet amount in the water storage tank cannot be automatically adjusted in real time, and the tobacco leaf baking effect cannot be guaranteed is effectively solved. The utility model discloses according to the humidity rate of change of the different toasting periods of tobacco leaf in the baking chamber that detects, when the water level is normal, difference humidity converts the PWM signal into and gets into atomizing piece drive circuit, the play fog volume of automatically regulated ultrasonic atomization ware, when the water level is abnormal (not proportional with the water that goes out fog volume consumption), voltage signal that corresponds humidity change signal gets into electric valve drive circuit behind attenuator 1/12, automatically regulated electric valve controlled storage water tank inflow, realize the atomizing volume of ultrasonic atomization ware and the automatically regulated of the interior inflow of storage water tank with this.

Description

Control system for flue-cured tobacco humidification

Technical Field

The utility model relates to a flue-cured tobacco technical field, especially a control system for flue-cured tobacco humidification.

Background

The tobacco leaf baking is a process combining moisture preservation and moisture discharge, the humidity is reasonably regulated and controlled, the moisture preservation and the moisture discharge are coordinated and unified, the tobacco leaf yellowing, color fixing, drying and flavor forming are critical, under the normal condition, the tobacco leaf yellowing stage humidity is 75% ~ 85%, the color fixing stage humidity is 30% ~ 69%, and the dry stem stage humidity is 29% ~ 10%, in a tobacco leaf characteristic detector, the moisture volatilized by the tobacco leaf far cannot reach a set humidity value, at present, the moisture atomized by an ultrasonic atomizer enters a baking chamber to provide the required humidity for baking the tobacco leaves, specifically, the ultrasonic atomizer is arranged in a water storage tank, the water amount in the water storage tank is controlled by an electric valve to provide the water level height of 7cm higher than that of an atomization piece of the ultrasonic atomizer, the moisture atomized by the ultrasonic atomizer enters the baking chamber to provide the required humidity for baking the tobacco leaves, but the control cannot automatically regulate the water inlet amount of the ultrasonic atomizer and the water inlet amount of the water storage tank in real time according to the humidity required by different baking stages of the tobacco leaves, and the effect of the tobacco leaves cannot be guaranteed.

Therefore, the utility model provides a new scheme to solve the problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control system for flue-cured tobacco humidification, solved effectively the atomizing volume and the storage water inflow that can not real-time automatically regulated ultrasonic atomization ware, problem that the effect of tobacco leaf toasts can not guarantee for the control system for flue-cured tobacco humidification.

The technical scheme for solving the problem is that the tobacco leaf baking device comprises a water storage tank, an electric valve and an ultrasonic atomizer, wherein the electric valve controls the water amount in the water storage tank to provide a water level height of 7cm with an atomization sheet of the ultrasonic atomizer, and water vapor atomized by the ultrasonic atomizer enters a baking chamber to provide required humidity for tobacco leaf baking;

the signal processing circuit comprises a triode Q1 and a triode Q2, the base of a triode Q1 and the base of a triode Q2 are connected with the output end of an operational amplifier AR2 through a resistor R9, the emitter of the triode Q2 is connected with +12V of a power supply, the collector of the triode Q2 is respectively connected with one end of a coil of a relay K14 and the negative electrode of a diode D1, the other end of the coil of the relay K14 is connected with the positive electrode of a diode D1, the common end of the relay K14 is connected with the output end of an operational amplifier AR1, the collector of a triode Q1 is connected with a normally closed contact of a relay K14, the emitter of the triode Q1 is connected with the reverse phase input end of an operational amplifier AR4, the non-phase input end of the operational amplifier AR4 is respectively connected with one end of a resistor R10 and one end of a grounding resistor R11, the other end of the resistor R10 is connected with +5V of the power supply, the normally, The inverting input terminal of the operational amplifier AR3 and the non-inverting input terminal of the operational amplifier AR3 are connected to each other through a resistor R13, and the other terminal of the resistor R14, the output terminal of the operational amplifier AR3 and the output terminal of the operational amplifier AR4 are output signals of the signal processing circuit.

The utility model discloses according to the humidity rate of change of the different toasting periods of tobacco leaf in the baking chamber that detects, when the water level is normal, difference humidity converts the PWM signal into and gets into atomizing piece drive circuit, the play fog volume of automatically regulated ultrasonic atomization ware, when the water level is abnormal (not proportional with the water that goes out fog volume consumption), voltage signal that corresponds humidity change signal gets into electric valve drive circuit behind attenuator 1/12, automatically regulated electric valve controlled storage water tank inflow, realize the atomizing volume of ultrasonic atomization ware and the automatically regulated of the interior inflow of storage water tank with this.

Drawings

Fig. 1 is a block diagram of the circuit connection of the present invention.

Fig. 2 is a schematic diagram of the circuit connection of the present invention.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be more clearly understood from the following detailed description of the embodiments with reference to fig. 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

The embodiment I, a control system for flue-cured tobacco humidification, the interior water yield of motorised valve control storage water tank provides and the water level height of ultrasonic nebulizer atomizing piece 7cm, and the steam behind the ultrasonic nebulizer atomizing gets into the baking chamber, provides required humidity for the tobacco flue-curing, signal detection circuitry passes through water level sensor H1 real-time detection storage water tank's the water level, gets into operational amplifier AR2 after filtering, current-limiting and compares with the voltage that the minimum water level that allows corresponds, outputs high/low level, detects the humidity in the baking chamber in real time through humidity transducer H2, gets into the integrator after the filtering, calculates the voltage signal that the humidity rate of change of certain time corresponds, later gets into signal processing circuit, when operational amplifier AR2 output high level, triode Q1 switches on, and the voltage signal that corresponds with the humidity rate of change passes through relay K14's normally closed contact, The CE of the conducted triode Q1 is added to the inverting input end of the operational amplifier AR4, difference operation is carried out on the CE and a proper humidity change signal accessed from the inverting input end, difference humidity is output, PWM pulse frequency signals are converted by a PWM converter taking an NE555 chip U1 as a core in the PWM conversion circuit and enter an atomizing sheet driving circuit, the fog output of the ultrasonic atomizer is automatically adjusted, when the operational amplifier AR2 outputs low level, the triode Q2 is conducted, a coil of a relay K14 is electrified, a normally closed contact is disconnected, the ultrasonic atomizer keeps the fog output, meanwhile, the normally open contact is closed, a voltage signal corresponding to the humidity change signal is attenuated by an attenuator 1/12 consisting of a resistor R13-resistor R15 and the operational amplifier AR3 and then enters a PWM electric valve converter taking the NE555 chip U2 as a core to convert the PWM pulse frequency signals and enter the driving circuit, the water inlet of a water storage tank controlled by the electric, therefore, the atomization amount of the ultrasonic atomizer and the water inflow in the water storage tank can be automatically adjusted;

the signal processing circuit is used for conducting the triode Q1 when the operational amplifier AR2 outputs high level, voltage signals corresponding to the humidity change rate are added to the inverting input end of the operational amplifier AR4 through the normally closed contact of the relay K14 and the CE of the conducted triode Q1, appropriate humidity change signals (specifically, difference humidity values of two adjacent periods during tobacco leaf baking can be detected by a color sensor or a high-definition CCD camera to capture a frame of tobacco leaf image and transmitted to a processing computer through a 1394 interface, the processing computer carries out difference operation according to the preset difference humidity value between the period and the previous period, the prior art is adopted, the detailed description is not repeated, the difference humidity is output, when the operational amplifier AR2 outputs low level, the triode Q2 is conducted, the coil of the relay K14 is electrified, the normally closed contact is disconnected, the ultrasonic atomizer keeps atomization amount, the constant-open contact is closed, a voltage signal corresponding to the humidity change signal is output after being attenuated by an attenuator 1/12 (obtained according to the reduction ratio of the mist output and water) consisting of a resistor R13-a resistor R15 and an operational amplifier AR3, the constant-open contact comprises a triode Q1 and a triode Q2, the base of the triode Q1 and the base of the triode Q2 are connected with the output end of the operational amplifier AR2 through a resistor R9, the emitter of the triode Q2 is connected with +12V, the collector of the triode Q2 is respectively connected with one end of a coil of a relay K14 and the negative electrode of a diode D1, the other end of the coil of the relay K14 and the positive electrode of the diode D1 are connected with the ground, the common end of the relay K14 is connected with the output end of the operational amplifier AR1, the collector of the triode Q1 is connected with the constant-close contact of the relay K14, the emitter of the triode Q1 is connected with the reverse-phase, One end of a ground resistor R11, the other end of a resistor R10 is connected with a power supply +5V, a normally open contact of a relay K14 is connected with one end of a resistor R15, the other end of the resistor R15 is respectively connected with one end of a resistor R14 and an inverting input end of an operational amplifier AR3, a non-inverting input end of the operational amplifier AR3 is connected with the ground through the resistor R13, and the other end of the resistor R14, an output end of the operational amplifier AR3 and an output end of the operational amplifier AR4 are output signals of the signal processing circuit.

In the second embodiment, on the basis of the first embodiment, the signal detection circuit detects the water level in the water storage tank in real time through a water level sensor H1 with the model of DX-130, after filtering through a resistor R6 and a capacitor C3, and current limiting through a resistor R5, the signal enters the non-inverting input terminal of an operational amplifier AR2 and is compared with the voltage (0.6 cm higher than the water level of 7cm of an ultrasonic atomizer atomizing sheet) corresponding to the lowest water level allowed by the inverting input terminal, when the voltage is higher than or lower than the lowest water level, the high/low level is output, the humidity in the baking chamber is detected in real time through a humidity sensor H2 with the model of DHT11, the signal enters an integrator consisting of an operational amplifier AR1, a resistor R1, a resistor R4 and a capacitor C2 after filtering through a resistor R2 and a capacitor C1, and the voltage signal corresponding to the humidity change rate of a certain time is calculated, wherein the voltage signal comprises a humidity sensor H2 and the signals output by the water level, One end of a grounding resistor R6, one end of a resistor R5, the negative electrode of a capacitor C3 is connected with the ground, the other end of the resistor R5 is connected with the non-inverting input end of an operational amplifier AR2, the inverting input end of the operational amplifier AR2 is respectively connected with one end of the grounding resistor R7 and one end of a resistor R8, the other end of the resistor R8 is connected with +5V of a power supply, a signal output by a humidity sensor H2 is respectively connected with the positive electrode of the capacitor C1, one end of the grounding resistor R2 and one end of the resistor R1, the negative electrode of the capacitor C1 is connected with the ground, the other end of the resistor R1 is connected with the inverting input end of the operational amplifier AR1, one end of the resistor R4 and one end of the capacitor C2, the non-inverting input end of the operational amplifier AR1 is connected with the ground through a resistor R3;

the PWM conversion circuit is used for generating PWM pulse frequency signals which are in direct proportion to the amplitude of voltage signals through a resistor R12, an NE555 chip U1, electrolytic capacitors E1 and E2, a resistor R13, an NE555 chip U2, electrolytic capacitors E4 and E5 and generating PWM pulse frequency signals which are in direct proportion to the amplitude of the voltage signals, wherein the resistor R12, the electrolytic capacitor E1, the resistor R13 and the electrolytic capacitor E4 are time constants and control PWM pulse width, then the PWM pulse frequency signals enter an atomizing sheet/electric valve driving circuit (the atomizing sheet driving circuit can be driven by a power MOS tube and the electric valve driving circuit can be driven by an H bridge) to automatically adjust the atomizing amount of the ultrasonic atomizer and the water inflow amount of a water storage tank controlled by the electric valve, the PWM conversion circuit comprises a resistor R12 and a resistor R13, one end of the resistor R12 is connected with the output end of an operational amplifier AR4, the other end of the resistor R12 is respectively connected with a pin 6 and a pin 7 of an NE555 chip U63, pin 2, pin 4 and pin 8 of NE555 chip U1 are connected with +5V of power supply, pin 5 of NE555 chip U1 is connected with positive electrode of electrolytic capacitor E2, negative electrode of electrolytic capacitor E1, negative electrode of electrolytic capacitor E2 and pin 1 of NE555 chip U1 are all connected with ground, pin 3 of NE555 chip U1 is connected with positive electrode of grounded electrolytic capacitor E3 to provide driving signal for atomizing sheet driving circuit, one end of resistor R13 is connected with output end of operational amplifier AR3, another end of resistor R13 is respectively connected with pin 6 and pin 7 of NE555 chip U3 and positive electrode of electrolytic capacitor E4, pin 2, pin 4 and pin 8 of NE555 chip U2 are connected with +5V of power supply, pin 5 of NE555 chip U2 is connected with positive electrode of electrolytic capacitor E5, negative electrode of electrolytic capacitor E4, negative electrode of electrolytic capacitor E5 and pin 1 of NE555 chip U2 are all connected with ground, pin 4933 of NE555 chip U2 is connected with positive electrode of electrolytic capacitor E6, and providing a driving signal for the electric valve driving circuit.

When the utility model is used, the water level in the water storage tank is detected in real time by the water level sensor H1 and the humidity sensor H2, the humidity in the baking chamber is detected, the water level signal is compared with the voltage corresponding to the lowest allowable water level by the operational amplifier AR2, high/low level is output, the humidity signal is processed by the integrator, the voltage signal corresponding to the humidity change rate in a certain time is calculated, when the voltage signal is high level, the triode Q1 is switched on, the operational amplifier AR4 outputs differential humidity, when the voltage is low level, the triode Q2 is switched on, the relay K14 coil is electrified, the normally closed contact is disconnected, the ultrasonic atomizer keeps the atomization amount, meanwhile, the normally open contact is closed, the voltage signal corresponding to the humidity change signal is attenuated by the attenuator 1/12 and then enters and is converted into PWM pulse frequency signal to enter the electric valve driving circuit, the water inlet amount of, therefore, the atomization amount of the ultrasonic atomizer and the water inflow in the water storage tank can be automatically adjusted.

Claims

1. A control system for tobacco flue-curing humidification comprises a water storage tank, an electric valve and an ultrasonic atomizer, wherein the electric valve controls the water amount in the water storage tank to provide a water level height of 7cm with an atomization piece of the ultrasonic atomizer, and water vapor atomized by the ultrasonic atomizer enters a baking chamber to provide required humidity for tobacco baking;

the signal processing circuit comprises a triode Q1 and a triode Q2, wherein the base of a triode Q1 and the base of a triode Q2 are connected with the output end of an operational amplifier AR2 through a resistor R9, the emitter of the triode Q2 is connected with +12V of a power supply, the collector of a triode Q2 is respectively connected with one end of a coil of a relay K14 and the negative electrode of a diode D1, the other end of the coil of the relay K14 is connected with the positive electrode of a diode D1, the common end of a relay K14 is connected with the output end of an operational amplifier AR1, the collector of a triode Q1 is connected with a normally closed contact of a relay K14, the emitter of a triode Q1 is connected with the reverse phase input end of an operational amplifier AR4, the non-phase input end of the operational amplifier AR4 is connected with a suitable humidity change signal, the normally open contact of a relay K14 is connected with one end of a resistor R15, the other end of the resistor R15 is respectively connected with one end, the other end of the resistor R14, the output end of the operational amplifier AR3, and the output end of the operational amplifier AR4 are output signals of the signal processing circuit.

2. The control system according to claim 1, wherein the signal detection circuit comprises a water level sensor H1 and a humidity sensor H2, the signal output by the water level sensor H1 is connected to the positive electrode of a capacitor C3, one end of a ground resistor R6 and one end of a resistor R5 respectively, the negative electrode of a capacitor C3 is connected to ground, the other end of a resistor R5 is connected to the non-inverting input terminal of an operational amplifier AR2, the inverting input terminal of an operational amplifier AR2 is connected to one end of a ground resistor R7 and one end of a resistor R8 respectively, the other end of a resistor R8 is connected to +5V, the signal output by the humidity sensor H2 is connected to the positive electrode of a capacitor C1, one end of a ground resistor R2 and one end of a resistor R1 respectively, the negative electrode of a capacitor C1 is connected to ground, the other end of a resistor R1 is connected to the inverting input terminal of an operational amplifier AR1, one end of a resistor R4 and one end of a capacitor C2 respectively, the non-inverting input terminal of, the other end of the resistor R4 is connected with the other end of the capacitor C2 and the output end of the operational amplifier AR1 respectively;

the PWM conversion circuit comprises a resistor R12, one end of a resistor R12 is connected with an output signal of the signal processing circuit, the other end of the resistor R12 is respectively connected with a pin 6 and a pin 7 of an NE555 chip U1 and the anode of an electrolytic capacitor E1, a pin 2, a pin 4 and a pin 8 of the NE555 chip U1 are connected with +5V of a power supply, a pin 5 of an NE555 chip U1 is connected with the anode of an electrolytic capacitor E2, the cathode of the electrolytic capacitor E1, the cathode of the electrolytic capacitor E2 and a pin 1 of the NE555 chip U1 are all connected with the ground, a pin 3 of the NE555 chip U1 is connected with the anode of the grounded electrolytic capacitor E3, and a driving signal is provided for a driving circuit of an atomizing sheet and an electric valve.