CN219739559U - Intelligent metering control system for powder loading - Google Patents
Intelligent metering control system for powder loading Download PDFInfo
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- CN219739559U CN219739559U CN202321086982.1U CN202321086982U CN219739559U CN 219739559 U CN219739559 U CN 219739559U CN 202321086982 U CN202321086982 U CN 202321086982U CN 219739559 U CN219739559 U CN 219739559U
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- 239000000843 powder Substances 0.000 title claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims description 30
- 238000001514 detection method Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 9
- 230000003287 optical effect Effects 0.000 abstract description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 5
- 235000011941 Tilia x europaea Nutrition 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000004571 lime Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000009700 powder processing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of flow metering, and provides a powder loading intelligent metering control system which comprises a light source P1, a main control unit and a light-emitting driving circuit, wherein the light-emitting driving circuit comprises a triode Q4, a triode Q3, a switching tube Q5 and a switching tube Q7, the base electrode of the triode Q4 is connected with the main control unit, the base electrode of the triode Q4 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q4 is connected with a 24V power supply, the emitter electrode of the triode Q4 is connected with the emitter electrode of the triode Q3, the collector electrode of the triode Q3 is grounded, the emitter electrode of the triode Q3 is connected with the control end of the switching tube Q5 through a resistor R7, the first end of the switching tube Q5 is connected with a 24V power supply, the second end of the switching tube Q5 is connected with the first end of the light source P1, the second end of the light source P1 is grounded, the control end of the switching tube Q7 is connected with the first end of the light source P1, the first end of the switching tube Q7 is grounded, and the second end of the switching tube Q7 is connected with the base electrode of the triode Q4. Through the technical scheme, the problem that the optical method is inaccurate in powder flow detection in the prior art is solved.
Description
Technical Field
The utility model relates to the technical field of flow metering, in particular to an intelligent metering control system for powder loading.
Background
Lime powder is a building material commonly used in the building industry, the lime powder is transported by a powder material transport vehicle after being processed, a powder flow detection device is usually arranged at a discharge hole of the lime powder in the loading process of the lime powder, the output quantity of the lime powder is measured so as to avoid overweight transportation, or a fixed conveying quantity is set according to requirements, when the output quantity reaches a set value, the discharge is automatically closed, the current common powder flow detection method is an optical method, a transparent pipe is arranged at the discharge hole, a light emitting device and a photoelectric conversion device are arranged at two sides of the transparent pipe, the light emitting device emits light signals in the detection process, the photoelectric detection device is used for detecting the light signals, the larger the flow quantity of the powder is, the more serious the light attenuation is, and therefore the light signals received by the photoelectric receiving device are weaker, and the size of the powder flow can be obtained through the photoelectric conversion device. However, the output power of the light-emitting device in operation is greatly affected by the environment, and the light power emitted by the light-emitting device can change along with the change of the environment, so that the output light power is unstable, and the powder flow detection is inaccurate.
Disclosure of Invention
The utility model provides an intelligent metering control system for powder loading, which solves the problem that the optical method in the prior art is inaccurate in detecting powder flow.
The technical scheme of the utility model is as follows:
the intelligent metering control system for powder loading comprises a light source P1, a main control unit and a light-emitting driving circuit, wherein the light source P1 is used for emitting light signals, the light-emitting driving circuit is used for driving the light source P1, the light-emitting driving circuit is connected with the main control unit, the light-emitting driving circuit comprises a resistor R1, a switch tube Q2, a resistor R3, a switch tube Q1, a triode Q4, a triode Q3, a resistor R6, a resistor R7, a switch tube Q5, a resistor R28 and a switch tube Q7,
the control end of the switch tube Q2 is connected with the first output end of the main control unit through the resistor R1, the first end of the switch tube Q2 is connected with a 5V power supply, the second end of the switch tube Q2 is connected with the control end of the switch tube Q1 through the resistor R3, the first end of the switch tube Q1 is connected with a 24V power supply through the resistor R6, the second end of the switch tube Q1 is grounded, the first end of the switch tube Q1 is connected with the base electrode of the triode Q4, the base electrode of the triode Q4 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q4 is connected with a 24V power supply, the emitter electrode of the triode Q4 is connected with the emitter electrode of the triode Q3, the emitter electrode of the triode Q3 is connected with the control end of the switch tube Q5 through the resistor R7, the first end of the switch tube Q5 is connected with a 24V power supply, the second end of the switch tube Q5 is connected with the first end of the light source P1, the second end of the light source P1 is grounded,
the first end of the resistor R28 is connected with the first end of the light source P1, the second end of the resistor R28 is connected with the control end of the switch tube Q7, the first end of the switch tube Q7 is grounded, and the second end of the switch tube Q7 is connected with the base electrode of the triode Q4.
Further, the light-emitting driving circuit in the utility model further comprises a resistor R8, a resistor R9, an operational amplifier U1 and a resistor R10, wherein the non-inverting input end of the operational amplifier U1 is connected with the first end of the light source P1 through the resistor R8, the inverting input end of the operational amplifier U1 is grounded through the resistor R9, the output end of the operational amplifier U1 is connected with the inverting input end of the operational amplifier U1 through the resistor R10, and the output end of the operational amplifier U1 is connected with the first input end of the main control unit.
Further, the light-emitting driving circuit in the utility model further comprises a resistor R26, a resistor R27, an operational amplifier U5, a resistor R18, a resistor R15, an operational amplifier U3, a resistor R14, a resistor R12, a resistor R13, an operational amplifier U2, a resistor R17 and a switching tube Q6, wherein the non-inverting input end of the operational amplifier U5 is connected with the first end of the light source P1 through the resistor R26, the inverting input end of the operational amplifier U5 is grounded through the resistor R27, the output end of the operational amplifier U5 is connected with the inverting input end of the operational amplifier U5, the output end of the operational amplifier U5 is connected with the non-inverting input end of the operational amplifier U3 through the resistor R18, the inverting input end of the operational amplifier U3 is connected with the inverting input end of the operational amplifier U3 through the resistor R14, the output end of the operational amplifier U2 is connected with the switching tube Q6 through the non-inverting input end of the resistor R12, and the output end of the switching tube Q6 is connected with the first end of the switching tube Q5 through the resistor R17.
Further, the utility model also comprises a photoelectric receiving circuit, the photoelectric receiving circuit comprises a photoelectric receiving tube LED1, a resistor R16, a capacitor C4, an operational amplifier U7, a resistor R19, a resistor R21, an operational amplifier U6 and a resistor R20, the cathode of the photoelectric receiving tube LED1 is connected with a 5V power supply, the anode of the photoelectric receiving tube LED1 is grounded through the resistor R16, the anode of the photoelectric receiving tube LED1 is connected with the non-inverting input end of the operational amplifier U7 through the capacitor C4, the output end of the operational amplifier U7 is connected with the inverting input end of the operational amplifier U7, the output end of the operational amplifier U7 is connected with the non-inverting input end of the operational amplifier U6 through the resistor R19, the output end of the operational amplifier U6 is connected with the inverting input end of the operational amplifier U6 through the resistor R20, and the output end of the operational amplifier U6 is connected with the second input end of the main control unit.
Further, the photoelectric receiving circuit in the utility model further comprises a resistor R25, a resistor R24, a capacitor C8, an operational amplifier U8, a resistor R23, a resistor R22, a capacitor C7 and a capacitor C6, wherein a first end of the resistor R25 is connected with an output end of the operational amplifier U6, a second end of the resistor R25 is connected with an inverting input end of the operational amplifier U8 through the capacitor C8, a second end of the resistor R25 is grounded through the resistor R24, an inverting input end of the operational amplifier U8 is connected with a 5V power supply through the resistor R22, an output end of the operational amplifier U8 is connected with an inverting input end of the operational amplifier U6 through the resistor R23, an output end of the operational amplifier U8 is connected with a second end of the resistor R25 through the capacitor C7, and an output end of the operational amplifier U8 is connected with a second input end of the main control unit through the capacitor C6.
The working principle and the beneficial effects of the utility model are as follows:
in the utility model, the light-emitting driving circuit is used for outputting stable voltage, and the stable and unchanged output power of the light source P1 is ensured, so that the accuracy of powder flow detection is ensured.
Specifically, the working principle of the light-emitting driving circuit is as follows: in the process of detecting the powder flow, the main control unit outputs a PWM signal, when the PWM signal is in a low level, the switching tube Q2 is turned on, the switching tube Q1 is also turned on, the triode Q3 is turned on, the triode Q4 is turned off, the switching tube Q5 is turned off, and at the moment, the light source P1 does not emit light; when the PWM signal is at a high level, the switching transistor Q2 is turned off, the switching transistor Q1 is also turned off, the transistor Q4 is turned on, the transistor Q3 is turned off, the switching transistor Q5 is turned on, the 24V power supply is added to the light source P1 through the switching transistor Q5, and the light source P1 emits an infrared laser signal.
When the light source P1 works, the switch tube Q7 is conducted, the resistor R28 is used for sampling the resistor, when the output power of the light source P1 is reduced due to environmental influence, the partial pressure on the resistor R28 is reduced, the current flowing through the first end and the second end of the switch tube Q7 is reduced, the base current of the triode Q4 is increased, the voltage of the control end of the switch tube Q5 is increased, and the current flowing through the light source P1 is improved; when the output power of the light source P1 becomes large due to environmental influence, the working current of the light source P1 becomes large, and the voltage division on the resistor R28 increases, so that the current flowing through the first end and the second end of the switching tube Q7 becomes large, the base current of the triode Q4 is reduced, the voltage of the control end of the switching tube Q5 is reduced, and the current flowing through the light source P1 is reduced, so that the stable and unchanged output power of the light source P1 is realized.
Therefore, in the utility model, the power of the light source P1 can be automatically adjusted in the working process, and the stable and unchanged output power of the light source P1 is ensured, thereby solving the problem of inaccurate powder flow. When detecting powder with different particle sizes, infrared laser signals with different intensities are corresponding, the main control unit can adjust the duty ratio of the PWM signals, and the output power of the light source P1 is changed, so that the detection of powder flow with different particle sizes is adapted.
The utility model will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a circuit diagram of a light-emitting driving circuit according to the present utility model;
FIG. 2 is a circuit diagram of a voltage detection circuit according to the present utility model;
FIG. 3 is a circuit diagram of the protection circuit of the present utility model;
FIG. 4 is a circuit diagram of an optoelectronic receiver circuit in accordance with the present utility model;
fig. 5 is a circuit diagram of a filter circuit according to the present utility model.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1, this embodiment provides an intelligent metering control system for powder loading, including a light source P1, a main control unit and a light-emitting driving circuit, the light source P1 is used for emitting light signals, the light-emitting driving circuit is used for driving the light source P1, the light-emitting driving circuit is connected with the main control unit, the light-emitting driving circuit includes a resistor R1, a switch tube Q2, a resistor R3, a switch tube Q1, a triode Q4, a triode Q3, a resistor R6, a resistor R7, a switch tube Q5, a resistor R28 and a switch tube Q7, the control end of the switch tube Q2 is connected with the first output end of the main control unit through the resistor R1, the first end of the switch tube Q2 is connected with a 5V power supply, the second end of the switch tube Q2 is connected with the control end of the switch tube Q1 through the resistor R3, the first end of the switch tube Q1 is connected with a 24V power supply through the resistor R6, the second end of the switch tube Q1 is grounded, the first end of the switch tube Q1 is connected with the base electrode of the triode Q4, the base electrode of the triode Q4 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q4 is connected with a 24V power supply, the emitter electrode of the triode Q4 is connected with the emitter electrode of the triode Q3, the collector electrode of the triode Q3 is grounded, the emitter electrode of the triode Q3 is connected with the control end of the switch tube Q5 through a resistor R7, the first end of the switch tube Q5 is connected with a 24V power supply, the second end of the switch tube Q5 is connected with the first end of the light source P1, the second end of the resistor R28 is connected with the control end of the switch tube Q7, the first end of the switch tube Q7 is grounded, and the second end of the switch tube Q7 is connected with the base electrode of the triode Q4.
The light-emitting driving circuit is used for outputting stable voltage, and guaranteeing that the output power of the light source P1 is stable and unchanged, so that the accuracy of powder flow detection is guaranteed, and in the embodiment, an infrared laser emitter is adopted as the light source P1.
Specifically, the working principle of the light-emitting driving circuit is as follows: in the process of detecting the powder flow, the main control unit outputs a PWM signal, when the PWM signal is at a low level, the switching tube Q2 is turned on, the switching tube Q1 is also turned on, the first end of the switching tube Q1 is at a low level, the triode Q3 is turned on, the triode Q4 is turned off, therefore, the control end of the switching tube Q5 is at a low level, the switching tube Q5 is turned off, and the light source P1 does not emit light at the moment; when the PWM signal is at a high level, the switching tube Q2 is turned off, the switching tube Q1 is also turned off, the first end of the switching tube Q1 is at a high level, the triode Q4 is turned on, the triode Q3 is turned off, at this time, the control end of the switching tube Q5 is changed from a low level to a high level, the switching tube Q5 is turned on, the 24V power supply is added to the light source P1 after passing through the switching tube Q5, and the light source P1 emits an infrared laser signal.
When the light source P1 works, the switch tube Q7 is conducted, the resistor R28 is used for sampling the resistor, when the output power of the light source P1 is reduced due to environmental influence, the partial pressure on the resistor R28 is reduced, the current flowing through the first end and the second end of the switch tube Q7 is reduced, the base current of the triode Q4 is increased, the voltage of the control end of the switch tube Q5 is increased, and the current flowing through the light source P1 is improved; when the output power of the light source P1 becomes large due to environmental influence, the working current of the light source P1 becomes large, and the voltage division on the resistor R28 increases, so that the current flowing through the first end and the second end of the switching tube Q7 becomes large, thereby reducing the base current of the triode Q4, causing the voltage of the control end of the switching tube Q5 to be reduced, reducing the current flowing through the light source P1, and realizing stable output power of the light source P1.
The switching tube Q2 and the switching tube Q1 form an amplifying circuit for improving the driving capability of PWM signals, and the triode Q3 and the triode Q4 form a push-pull circuit for further improving the driving capability of PWM signals; the diode D1, the resistor R5 and the capacitor C1 form a rectifying and filtering circuit, so that the voltage applied to the light source P1 is constant, and the problem of inaccurate powder flow is solved. When detecting powder with different particle sizes, infrared laser signals with different intensities are corresponding, the main control unit can adjust the duty ratio of the PWM signals, and the output power of the light source P1 is changed, so that the detection of powder flow with different particle sizes is adapted.
As shown in fig. 2, the light-emitting driving circuit in this embodiment further includes a resistor R8, a resistor R9, an operational amplifier U1, and a resistor R10, where the in-phase input end of the operational amplifier U1 is connected to the first end of the light source P1 through the resistor R8, the inverting input end of the operational amplifier U1 is grounded through the resistor R9, the output end of the operational amplifier U1 is connected to the inverting input end of the operational amplifier U1 through the resistor R10, and the output end of the operational amplifier U1 is connected to the first input end of the main control unit.
In this embodiment, the resistor R8, the resistor R9, the op-amp U1 and the resistor R10 form a voltage detection circuit for detecting the voltage of the light source P1 during operation, and sending the detection result to the main control unit, and when the output power of the light source P1 changes due to unstable voltage, the output power of the light source P1 is adjusted by changing the duty ratio of the PWM signal.
The voltage of the light source P1 during operation is added to the non-inverting input end of the operational amplifier U1 through the resistor R8, and the operational amplifier U1 reduces the voltage of the two ends of the light source P1 and then sends the voltage to the main control unit. The resistor R11 and the capacitor C3 form a filter circuit for filtering interference in signals, so that the detection precision is improved, and the voltage stabilizing tube U4 can prevent the voltage entering the main control unit from being too high.
As shown in fig. 3, the light-emitting driving circuit in this embodiment further includes a resistor R26, a resistor R27, an operational amplifier U5, a resistor R18, a resistor R15, an operational amplifier U3, a resistor R14, a resistor R12, a resistor R13, an operational amplifier U2, a resistor R17, and a switching tube Q6, the non-inverting input terminal of the operational amplifier U5 is connected to the first terminal of the light source P1 through the resistor R26, the inverting input terminal of the operational amplifier U5 is grounded through the resistor R27, the output terminal of the operational amplifier U5 is connected to the non-inverting input terminal of the operational amplifier U5 through the resistor R18, the inverting input terminal of the operational amplifier U3 is grounded through the resistor R15, the output terminal of the operational amplifier U3 is connected to the inverting input terminal of the operational amplifier U2 through the resistor R13, the non-inverting input terminal of the operational amplifier U2 is connected to the Vref reference power supply through the resistor R12, the output terminal of the operational amplifier U2 is connected to the control terminal of the switching tube Q6 through the resistor R17, and the first terminal of the switching tube Q5 is connected to the second terminal of the switching tube Q5.
Since the environment of powder processing is complex, if the current flowing through the light source P1 is too large during the process of detecting the powder flow, the damage of the light source P1 may be caused, and therefore, the protection circuit is added in this embodiment, when the current flowing through the light source P1 exceeds the set value, the power supply should be turned off so as to prevent the light source P1 from being burnt out.
Specifically, the working principle of the protection circuit is as follows: the voltage at two ends of the light source P1 is divided by the resistor R26 and the resistor R27 and then is added to the in-phase input end of the operational amplifier U5, the operational amplifier U5 forms a follower to play a role of signal isolation, the following signal is added to the in-phase input end of the operational amplifier U3, the amplified signal is sent to the anti-phase input end of the operational amplifier U2, the operational amplifier U2 forms a comparison circuit, when the voltage of the anti-phase input end of the operational amplifier U2 is lower than the reference voltage Vref of the in-phase input end of the operational amplifier U2, the current flowing through the light source P1 is normal, the operational amplifier U2 outputs high level, the switching tube Q6 is cut off, when the current flowing through the light source P1 exceeds a set value, the voltage of the anti-phase input end of the operational amplifier U2 is higher than the voltage of the in-phase input end of the operational amplifier U2, the switching tube Q6 is conducted, and the control end of the switching tube Q5 is grounded, so that the light source P1 is powered off.
As shown in fig. 4, the embodiment further includes a photoelectric receiving circuit, where the photoelectric receiving circuit includes a photoelectric receiving tube LED1, a resistor R16, a capacitor C4, an operational amplifier U7, a resistor R19, a resistor R21, an operational amplifier U6, and a resistor R20, where a cathode of the photoelectric receiving tube LED1 is connected to a 5V power supply, an anode of the photoelectric receiving tube LED1 is grounded through the resistor R16, an anode of the photoelectric receiving tube LED1 is connected to a non-inverting input end of the operational amplifier U7 through the capacitor C4, an output end of the operational amplifier U7 is connected to an inverting input end of the operational amplifier U7, an output end of the operational amplifier U7 is connected to a non-inverting input end of the operational amplifier U6 through the resistor R19, and an output end of the operational amplifier U6 is connected to a second input end of the main control unit.
In the photoelectric receiving circuit, the photoelectric receiving tube LED1 is used for receiving an infrared laser signal sent by the light source P1, and the larger the powder flow of the discharge hole is, the weaker the light signal received by the photoelectric receiving tube LED1 is, and the stronger the light signal is otherwise. The photoelectric receiving tube LED1 converts the detected infrared laser signal into an electric signal, the electric signal is coupled through the capacitor C4 and then is sent to the in-phase input end of the operational amplifier U7, the operational amplifier U7 forms a comparator, and the electric signal output by the photoelectric receiving tube LED1 is weak, so that the comparator can reduce the loss of the electric signal on a circuit, can play a role in signal isolation, and is added to the in-phase input end of the operational amplifier U6 along with the subsequent electric signal, and the operational amplifier U6 forms an amplifying circuit to amplify the electric signal output by the photoelectric receiving tube LED1 and then send the amplified electric signal to the main control unit.
As shown in fig. 5, the photoelectric receiving circuit in this embodiment further includes a resistor R25, a resistor R24, a capacitor C8, an operational amplifier U8, a resistor R23, a resistor R22, a capacitor C7, and a capacitor C6, where a first end of the resistor R25 is connected to an output end of the operational amplifier U6, a second end of the resistor R25 is connected to an inverting input end of the operational amplifier U8 through the capacitor C8, a second end of the resistor R25 is grounded through the resistor R24, an inverting input end of the operational amplifier U8 is connected to a 5V power supply through the resistor R22, an output end of the operational amplifier U8 is connected to an inverting input end of the operational amplifier U6 through the resistor R23, an output end of the operational amplifier U8 is connected to a second end of the resistor R25 through the capacitor C7, and an output end of the operational amplifier U8 is connected to a second input end of the main control unit through the capacitor C6.
When receiving infrared laser signals sent by a light source P1, the photoelectric receiving tube LED1 receives interference infrared signals in the environment, and the signals influence the accuracy of final powder flow detection, so that the signals need to be filtered, and a filter circuit is formed by a resistor R25, a resistor R24, a capacitor C8, an operational amplifier U8, a resistor R23, a resistor R22, a capacitor C7 and a capacitor C6 and is used for filtering noise signals and high-frequency interference signals in the signals, and finally the filtered electric signals are sent to a main control unit, so that the output quantity of powder is obtained.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The intelligent metering control system for powder loading is characterized by comprising a light source P1, a main control unit and a light-emitting driving circuit, wherein the light source P1 is used for emitting light signals, the light-emitting driving circuit is used for driving the light source P1, the light-emitting driving circuit is connected with the main control unit, the light-emitting driving circuit comprises a resistor R1, a switch tube Q2, a resistor R3, a switch tube Q1, a triode Q4, a triode Q3, a resistor R6, a resistor R7, a switch tube Q5, a resistor R28 and a switch tube Q7,
the control end of the switch tube Q2 is connected with the first output end of the main control unit through the resistor R1, the first end of the switch tube Q2 is connected with a 5V power supply, the second end of the switch tube Q2 is connected with the control end of the switch tube Q1 through the resistor R3, the first end of the switch tube Q1 is connected with a 24V power supply through the resistor R6, the second end of the switch tube Q1 is grounded, the first end of the switch tube Q1 is connected with the base electrode of the triode Q4, the base electrode of the triode Q4 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q4 is connected with a 24V power supply, the emitter electrode of the triode Q4 is connected with the emitter electrode of the triode Q3, the emitter electrode of the triode Q3 is connected with the control end of the switch tube Q5 through the resistor R7, the first end of the switch tube Q5 is connected with a 24V power supply, the second end of the switch tube Q5 is connected with the first end of the light source P1, the second end of the light source P1 is grounded,
the first end of the resistor R28 is connected with the first end of the light source P1, the second end of the resistor R28 is connected with the control end of the switch tube Q7, the first end of the switch tube Q7 is grounded, and the second end of the switch tube Q7 is connected with the base electrode of the triode Q4.
2. The intelligent metering control system for powder loading according to claim 1, wherein the light-emitting driving circuit further comprises a resistor R8, a resistor R9, an operational amplifier U1 and a resistor R10, wherein the in-phase input end of the operational amplifier U1 is connected with the first end of the light source P1 through the resistor R8, the anti-phase input end of the operational amplifier U1 is grounded through the resistor R9, the output end of the operational amplifier U1 is connected with the anti-phase input end of the operational amplifier U1 through the resistor R10, and the output end of the operational amplifier U1 is connected with the first input end of the main control unit.
3. The intelligent metering control system for powder loading according to claim 1, wherein the light-emitting driving circuit further comprises a resistor R26, a resistor R27, an operational amplifier U5, a resistor R18, a resistor R15, an operational amplifier U3, a resistor R14, a resistor R12, a resistor R13, an operational amplifier U2, a resistor R17 and a switching tube Q6, wherein the in-phase input end of the operational amplifier U5 is connected with the first end of the light source P1 through the resistor R26, the opposite-phase input end of the operational amplifier U5 is grounded through the resistor R27, the output end of the operational amplifier U5 is connected with the opposite-phase input end of the operational amplifier U5 through the resistor R18, the opposite-phase input end of the operational amplifier U3 is grounded through the resistor R15, the output end of the operational amplifier U3 is connected with the opposite-phase input end of the operational amplifier U3 through the resistor R14, the output end of the operational amplifier U3 is connected with the first end of the switching tube Q6 through the resistor R13, the output end of the operational amplifier U3 is connected with the second end of the switching tube Q6 through the opposite-phase input end of the operational amplifier U2, and the output end of the switching tube Q5 is connected with the second end of the switching tube.
4. The intelligent metering control system for powder loading according to claim 1, further comprising a photoelectric receiving circuit, wherein the photoelectric receiving circuit comprises a photoelectric receiving tube LED1, a resistor R16, a capacitor C4, an operational amplifier U7, a resistor R19, a resistor R21, an operational amplifier U6 and a resistor R20, a cathode of the photoelectric receiving tube LED1 is connected with a 5V power supply, an anode of the photoelectric receiving tube LED1 is grounded through the resistor R16, an anode of the photoelectric receiving tube LED1 is connected with a non-inverting input end of the operational amplifier U7 through the capacitor C4, an output end of the operational amplifier U7 is connected with a non-inverting input end of the operational amplifier U7, an output end of the operational amplifier U7 is connected with a non-inverting input end of the operational amplifier U6 through the resistor R19, and an output end of the operational amplifier U6 is connected with a second input end of the main control unit.
5. The intelligent metering control system for powder loading according to claim 4, wherein the photoelectric receiving circuit further comprises a resistor R25, a resistor R24, a capacitor C8, an operational amplifier U8, a resistor R23, a resistor R22, a capacitor C7 and a capacitor C6, wherein a first end of the resistor R25 is connected with an output end of the operational amplifier U6, a second end of the resistor R25 is connected with an inverting input end of the operational amplifier U8 through the capacitor C8, a second end of the resistor R25 is grounded through the resistor R24, an inverting input end of the operational amplifier U8 is connected with a 5V power supply through the resistor R22, an output end of the operational amplifier U8 is connected with an inverting input end of the operational amplifier U6 through the resistor R23, an output end of the operational amplifier U8 is connected with a second end of the resistor R25 through the capacitor C7, and an output end of the operational amplifier U8 is connected with a second input end of the main control unit through the capacitor C6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321086982.1U CN219739559U (en) | 2023-05-08 | 2023-05-08 | Intelligent metering control system for powder loading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321086982.1U CN219739559U (en) | 2023-05-08 | 2023-05-08 | Intelligent metering control system for powder loading |
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