CN112097910A - Intelligent RGB digital color sensor circuit system - Google Patents

Abstract

The embodiment of the application provides an intelligent RGB digital color sensor circuit system, including processor module, input/output module, RGB light source control module, signal processing module and for the power module of above-mentioned each module power supply, input/output module RGB light source control module signal processing module respectively with processor module electric connection, signal processing module include RGB light intensity feedback circuit, with RGB light intensity feedback circuit output electric connection's sampling unit, with sampling unit input electric connection's detected signal selection unit. The intelligent RGB digital color sensor circuit system improves the detection automation degree of the color sensor and improves the detection precision.

Description

An intelligent RGB digital color sensor circuit system

technical field

The invention relates to the technical field of color sensors, in particular to an intelligent RGB digital color sensor circuit system.

Background technique

In the existing RGB color sensor circuit system, after the sensor is controlled by the RGB light source control module, manual adjustment is used to select the internal or external detection head to determine the detection mode, and after the detection mode is determined, the magnification is adjusted. There is a large difference in magnification between the internal detection mode and the external detection mode, which causes the existing RGB color sensor to have a large influence of human factors in the process of detection mode determination and magnification adjustment, which in turn leads to a decrease in detection accuracy.

The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems and provide an intelligent RGB digital color sensor circuit system, which can determine the detection mode through the internal and external detection head signal circuits, and select the corresponding signal amplification according to the detection mode, so that the sensor can be automated Improve the level, reduce the influence of human factors, and improve the detection accuracy.

In order to achieve the above purpose, the present invention provides an intelligent RGB digital color sensor circuit system, including a processor module, an input and output module, an RGB light source control module, a signal processing module, and a power supply module for supplying power to the above modules. The output module, the RGB light source control module, and the signal processing module are respectively electrically connected to the processor module, and the signal processing module includes an RGB light intensity feedback circuit, which is electrically connected to the output end of the RGB light intensity feedback circuit. A connected sampling unit, and a detection signal selection unit electrically connected to the input end of the sampling unit.

Preferably, the detection signal selection unit includes a mainframe internal detection head signal circuit, an external detection head signal circuit, and a signal electrically connected to the output terminal of the mainframe internal detection head signal circuit and the output terminal of the external detection head signal circuit Amplifying circuit, the internal detection head signal circuit of the host includes a photoelectric receiving tube RX and an amplifier OP2 whose inverting input terminal is electrically connected to the positive pole of the photoelectric receiving tube RX, and the non-inverting input terminal is electrically connected to the resistors (R28, R29). , the voltage division generated by the resistors (R28, R29) is the reference voltage of the amplifier OP2, the amplifier OP2 is electrically connected to the input end of the signal amplifying circuit, and the external detection head signal circuit is connected to the signal amplifier OP2 through the resistor R32. The processor module is electrically connected to the input end of the signal amplifying circuit through a resistor R31.

Preferably, the input end of the external detection head signal circuit is connected with an external detection head voltage control circuit electrically connected to the processor module, and the external detection head voltage control circuit includes a composite triode Q12, a composite triode Q13, a composite triode The triode Q14, the composite triode Q12 and/or the composite triode Q13 and/or the composite triode Q14 are two interconnected NPN triodes. When the input end of each NPN transistor has one or two input high level, the output is low level.

Preferably, a selection electronic switch is connected between the output terminal of the internal detection head signal circuit of the host, the output terminal of the external detection head signal circuit and the signal amplification circuit, and the internal detection head signal circuit of the host passes through the amplifier OP2 The output end of the sensor is connected to the selection electronic switch, and the external detection head signal circuit is electrically connected to the selection electronic switch through the resistor R31 and the filter capacitor C30.

Preferably, the signal amplifying circuit includes a main signal secondary amplifying circuit whose output terminal is electrically connected to the sampling unit, and an amplification factor switching electronic switch that is electrically connected to an input terminal of the main signal secondary amplifying circuit. The magnification switching electronic switch is connected with the output end of the signal circuit of the internal detection head of the host and the signal circuit of the external detection head through the selection electronic switch. When the external detection head is connected, the processor module cuts off the sampling of the signal of the internal detection head and makes the signal sampling of the external detection head. Select the external sensor head signal for sampling.

Preferably, an anti-interference unit is connected between the output end of the main signal secondary amplifier circuit and the sampling unit, and the anti-interference unit is a Schottky diode.

Preferably, the sampling unit includes an AD electronic sampling control switch 1 and an AD electronic sampling control switch 2 connected in parallel, the AD electronic sampling control switch 1 and the AD electronic sampling control switch 2 are respectively electrically connected to the processor module. For signal transmission, the input terminal of the AD electronic sampling control switch 1 is electrically connected to the RGB light intensity feedback circuit, and the input terminal of the AD electronic sampling control switch 2 is electrically connected to the detection signal selection unit The output terminal is electrically connected.

Preferably, the output terminal of the AD electronic sampling control switch 1 is connected with a resistor R41 and is electrically connected to the processor module through the resistor R41, and the output terminal of the AD electronic sampling control switch 2 is connected with a resistor R42 and is electrically connected to the processor module. It is electrically connected to the processor module through the resistor R42.

Preferably, the main signal secondary amplifying circuit is electrically connected with the AD electronic sampling control switch 2, and the input end of the AD electronic sampling control switch 1 is also connected with the RGB light intensity feedback circuit arranged in parallel. the anti-jamming unit.

Preferably, the system further includes a human-machine interface circuit electrically connected to the processor module, and the human-machine interface circuit is electrically connected to the power supply module.

According to the intelligent RGB digital color sensor circuit system of the present invention, the detection signal selection unit determines whether the detection sensor circuit has access to the signal circuit of the external detection head or whether the external detection head is connected well, and then selects the detection mode, and according to the sensor The detection mode determined by the automatic detection can adjust the magnification, reduce the influence of human factors in the sensor detection, and improve the detection accuracy.

Further, the sampling unit is used to control the sampling time of the signal output by the RGB light intensity feedback circuit and the main detection signal, so as to improve the validity of the sampling data, thereby improving the detection accuracy of the sensor.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a system block diagram of an intelligent RGB digital color sensor circuit system of the application;

FIG. 2 is a schematic structural diagram of the processor module in FIG. 1 of the application;

Fig. 3 is the circuit schematic diagram of the input-output module in Fig. 1 of the application;

FIG. 4 is a schematic circuit diagram of the RGB light source control module in FIG. 1 of the application;

FIG. 5 is a schematic circuit diagram of the signal processing module in FIG. 1 of the application;

6 is a circuit schematic diagram of the RGB light intensity feedback circuit in FIG. 1 of the application;

7 is a schematic circuit diagram of a detection signal selection unit in FIG. 1 of the application;

FIG. 8 is a circuit schematic diagram of the external detection head voltage control circuit in FIG. 1 of the application;

Fig. 9 is the circuit schematic diagram of the external input circuit in Fig. 1 of the application;

FIG. 10 is a circuit schematic diagram of the sampling unit in FIG. 1 of the application;

11 is a circuit schematic diagram of a human-machine interface circuit of an intelligent RGB digital color sensor circuit system in an embodiment of the application;

FIG. 12 is a circuit schematic diagram of an external detection head signal circuit in an embodiment of the present application.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Embodiment: Referring to Figure 1, an intelligent RGB digital color sensor circuit system includes a processor module, an input and output module, an RGB light source control module, a signal processing module, and a power supply module for supplying power to the above modules, an input and output module. , the RGB light source control module and the signal processing module are respectively electrically connected with the processor module. Referring to Figure 2, the processor module selects any 32-bit high-speed processor in the prior art, selects STM32F103RET6, and the package mode is TQFP64A_P050L10W10. During the sensor operation, the RGB light source control module adjusts the light source as needed, and the signal processing module adjusts the light source. The color in the sample is processed, and the sampled data is transmitted to the processor module for output through the input and output module.

The input and output module can be any input and output circuit in the technical field. Preferably, this embodiment adopts a four-way output control circuit. Referring to FIG. 3, in the circuit, there are triode Q9, triode Q10, triode Q7, The transistor Q8, the transistor Q9, the transistor Q10, the transistor Q7, and the transistor Q8 are connected in parallel, and the collectors of the transistor Q9, the transistor Q10, the transistor Q7, and the transistor Q8 are respectively connected to the power supply module. The base set of Q8 is connected to pin 43, pin 32, pin 45, and pin 44 of STM32F103RET6 respectively, and the parallel intersection of transistor Q9, transistor Q10, transistor Q7, and transistor Q8 is connected to pin 10 of STM32F103RET6.

The RGB light source control module can be any existing RGB light source control circuit in the technical field. In this embodiment, referring to FIG. 4 , the terminals PWMG, PWMB, PWMR, LED-GO of the RGB light source control module are selected. , LED-BO and LED-RO are respectively connected with pins 37, 39, 38, 36, 41 and 40 of STM32F103RET6. The brightness is adjusted by adjusting the parameters of the triode in the RGB light source control circuit.

Specifically, the signal processing module includes an RGB light intensity feedback circuit, a sampling unit electrically connected to the output end of the RGB light intensity feedback circuit, and a detection signal selection unit electrically connected to the input end of the sampling unit. The RGB light intensity feedback circuit can be any kind of light intensity feedback circuit in the prior art. The function of the RGB light intensity feedback circuit is to feed back to the 32-bit high-speed processor when the RGB light-emitting brightness is attenuated, and the 32-bit high-speed processing is then automatically performed. Gain adjustment, brighten the brightness a little. Referring to Figure 5 and Figure 6, the characteristics are: the RGB light intensity feedback circuit is provided with a photosensitive sensor RX with an emitter grounded, an inverting input terminal is electrically connected to the collector of the photoelectric receiving tube RX, and the non-inverting input terminal is connected to the photoelectric The emitter of the receiver tube RX is electrically connected to the amplifier IC, and the optical signal detected by the photoelectric receiver tube RX is amplified by the amplifier IC. The detection head of the color sensor is divided into two types, namely the optical fiber type detection head and the optical fiber + circuit type detection head. The optical fiber detection head does not have a detection circuit, and the optical fiber + circuit type detection head has its own detection circuit. It can be connected to the detection circuit in this embodiment for detection.

As a preferred implementation of this embodiment, as shown in FIG. 7 , the detection signal selection unit includes an internal detection head signal circuit of the host, an external detection head signal circuit, and an output end of the internal detection head signal circuit of the host, an external detection head The signal amplifier circuit is electrically connected to the output end of the signal circuit. The signal circuit of the detection head inside the host includes a photoelectric receiver tube RX and an amplifier OP2 whose inverting input terminal is electrically connected to the positive pole of the photoelectric receiver tube RX, and the non-inverting input terminal is electrically connected to the resistors (R28, R29). The resistors (R28, R29) The resulting divided voltage is the reference voltage for amplifier OP2. The external detection head signal circuit is electrically connected to the processor module through the resistor R32, and is electrically connected to the input end of the signal amplification circuit through the resistor R31. Referring to Figure 5 and Figure 7, the connection point ESI1 in the circuit is connected to the external detection head signal circuit, and then connected to the signal selection electronic switches SW3 and SW4 through the resistor R31; the connection point AD1A is connected to the pin 15 of the STM32F103RET6, and the The 32-bit high-speed processor is connected, which can detect and identify whether the external detection head is connected properly. When the external detection head is connected, the 32-bit high-speed processor preferentially selects the external detection head signal for sampling, and cuts off the transmission and the internal detection head signal. sampling.

Referring to FIG. 8 and FIG. 12 , the input end of the external detection head signal circuit is connected with an external detection head voltage control circuit that is electrically connected to the processor module. The external detection head voltage control circuit includes a composite triode Q12, a composite triode Q13, a composite triode The triode Q14, the composite triode Q12 and/or the composite triode Q13 and/or the composite triode Q14 are two NPN triodes connected to each other. When the input of the transistor has one or two inputs high, the output is low. In this embodiment, three pairs of interconnected NPN transistors are connected to the signal circuit of the external detection head, wherein the input and output ends of a pair of NPN transistors Q13 are respectively drawn out and connected to the input ends of the other two pairs of NPN transistors Q12 and Q14, The input terminal of NPN transistor Q13 is connected to pins 11 and 14 of STM32F103RET6, and the output terminals of NPN transistor Q12 and NPN transistor Q14 are connected to the external input circuit. Referring to Figure 9, a pair of NPN transistors 15 are set in the external input circuit. , the base set of the NPN triode 15 is connected to the power module for power supply, and the two collectors of the NPN triode 15 are respectively connected to the pins 58 and 59 of the STM32F103RET6.

In this embodiment, referring back to FIG. 7 , a selection electronic switch is connected between the output terminal of the signal circuit of the internal detection head of the host, the output terminal of the signal circuit of the external detection head and the signal amplification circuit, and the signal circuit of the internal detection head of the host is connected through the output of the amplifier OP2 The terminal is connected with the selection electronic switch, and the external detection head signal circuit is electrically connected with the selection electronic switch through the resistor R31 and the filter capacitor C30. The selection electronic switch is connected to pins 23 and 24 of the STM32F103RET6. When the 32-bit high-speed processor receives the signal, the processor controls the electronic switch to select, if it is detected that the external detection head has been connected, the transmission and sampling of the internal detection signal will be disconnected, and the external signal will be preferentially selected to enter the next stage circuit .

As a preferred solution of the above-mentioned embodiment, the signal amplifying circuit includes a main signal secondary amplifying circuit whose output terminal is electrically connected to the sampling unit, and an amplification factor switching electronic switch that is electrically connected to the input terminal of the main signal secondary amplifying circuit, and the amplification factor is switched. The electronic switch is connected with the output end of the signal circuit of the internal detection head of the host and the signal circuit of the external detection head through the selection electronic switch, and the electronic switch of the magnification switching is connected with the pin 22 of the STM32F103RET6. The internal or external detection head is selected to be connected to the detection circuit by selecting the electronic switch. When the external detection head is connected, the processor module cuts off the sampling of the internal detection head signal and selects the external detection head signal for sampling. The 32-bit high-speed processor controls the magnification switching electronic switch to adjust the magnification of the amplifier, realizes the automation of sensor detection, avoids the influence of human factors, and improves the detection accuracy. The magnification switch is controlled by a 32-bit high-speed processor. The detection mode is different, and different magnifications are selected. For example, when detecting objects with weak reflection such as black, select high magnification. Low magnification.

An anti-interference unit is connected between the output end of the main signal secondary amplifier circuit and the sampling unit, and the anti-interference unit is a Schottky diode. Using the characteristics of the Schottky diode, the sampling unit avoids the peak interference that occurs in the sampling process of the main signal secondary amplifier circuit, and improves the data accuracy of the signal sampling.

As a preferred implementation of this embodiment, as shown in FIG. 10 , the sampling unit includes AD electronic sampling control switch 1 and AD electronic sampling control switch 2 connected in parallel, AD electronic sampling control switch 1 , D electronic sampling control switch 2 are respectively electrically connected with the processor module for signal transmission. The leads on the node where AD electronic sampling control switch 1 and AD electronic sampling control switch 2 are connected in parallel are connected to pins 20 and 21 of STM32F103RET6, and the 32-bit high-speed processor controls the electronic sampling control switch. The input end of the AD electronic sampling control switch 1 is electrically connected to the RGB light intensity feedback circuit, and the input end of the AD electronic sampling control switch 2 is electrically connected to the output end of the detection signal selection unit. One end of AD electronic sampling control switch 1 is connected to pin 16 of STM32F103RET6, and one end of AD electronic sampling control switch 2 is connected to pin 17 of STM32F103RET6.

The output end of AD electronic sampling control switch 1 is connected with resistor R41 and is electrically connected with the processor module through the resistor R41, and the output end of the AD electronic sampling control switch 2 is connected with a resistor R42 and is electrically connected with the processor module through the resistor R42. The function of the resistor R41 and the resistor R42 is to cooperate with the output signals ADSW1 and ADSW2 of the single-chip microcomputer, and pull down the potential when the single-chip microcomputer has no output signal. As shown in Figure 10, the other ends of the resistor R41 and the resistor R42 are grounded, and the output end of the AD electronic sampling control switch 1 and the resistor R41 are electrically connected to the processor module through a wire to control the sampling of the RGB light intensity feedback circuit time, the output end of the AD electronic sampling control switch 2 and the resistor R42 are electrically connected to the processor module through a wire to control the sampling time of the main detection signal.

In this embodiment, the main signal secondary amplifying circuit is electrically connected with the AD electronic sampling control switch 2, and the input end of the AD electronic sampling control switch 1 is also connected with an anti-interference unit (Schott) arranged in parallel with the RGB light intensity feedback circuit. base diode).

The system also includes a human-machine interface circuit that is electrically connected to the processor module. Referring to Figure 11, the human-machine interface circuit is electrically connected to the power supply module. The human-machine interface circuit can be any one commonly used in the technical field.

Working principle: The RGB light intensity feedback circuit detects the light intensity of the detected object in real time. When the light intensity decreases, the light compensation is performed by the 32-bit high-speed processor to adjust the light brightness in real time. During the detection process, a 32-bit high-speed processor controls the sampling time. When the detection head is connected to the sensor detection circuit, the 32-bit high-speed processor detects the signal source circuit (the main internal detection head signal circuit, the external detection head signal circuit), that is, it judges whether the external detection head is connected, and selects the electronic switch. According to the judgment result of the signal source circuit, the detection mode is selected. When an external detection head has been connected, the external signal is preferentially selected to enter the next stage circuit. During the working process, the magnification switching electronic switch switches the magnification according to the detection mode determined by the selection electronic switch. When it detects that the reflected light intensity of the measured object is strong, select a low magnification to amplify the signal. When it detects the reflected light of the measured object When the intensity is weak, select a high magnification for signal amplification. After the signal is amplified, AD signal analog-to-digital conversion is carried out through the AD sampling electronic control switch, and finally the converted data signal is transmitted to the 32-bit high-speed processor, and the detection result is displayed by the man-machine interface circuit.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The utility model provides an intelligent RGB digital color sensor circuit system, includes processor module, input/output module, RGB light source control module, signal processing module and for the power module of above-mentioned each module power supply, input/output module RGB light source control module signal processing module respectively with processor module electric connection, its characterized in that, signal processing module include RGB light intensity feedback circuit, with RGB light intensity feedback circuit output electric connection's sampling unit, with sampling unit input electric connection's detected signal selection unit.

2. The intelligent RGB digital color sensor circuit system of claim 1, wherein the detection signal selection unit includes a host internal detector signal circuit, an external detector signal circuit, and a signal amplification circuit electrically connected to the output of the host internal detector signal circuit and the output of the external detector signal circuit, the host internal detector signal circuit includes a photo-receiving tube RX and an amplifier OP2 having an inverting input electrically connected to the positive electrode of the photo-receiving tube RX and a non-inverting input electrically connected to a resistor (R28, R29), the voltage division generated by the resistor (R28, R29) is a reference voltage of the amplifier OP2, the amplifier OP2 is electrically connected to the input of the signal amplification circuit, the external detector signal circuit is electrically connected to the processor module through the resistor R32, The input end of the signal amplifying circuit is electrically connected with the resistor R31.

3. The intelligent RGB digital color sensor circuit system of claim 2, wherein the external detector head signal circuit has an input terminal connected to an external detector head voltage control circuit electrically connected to the processor module, the external detector head voltage control circuit includes a composite transistor Q12, a composite transistor Q13, and a composite transistor Q14, the composite transistor Q12 and/or the composite transistor Q13 and/or the composite transistor Q14 are two NPN transistors connected to each other, and the output is high when the input terminals of the two NPN transistors are both low, and the output is low when one or both of the input terminals of the two NPN transistors are high.

4. The intelligent RGB digital color sensor circuit system of claim 2 or 3, wherein a selection electronic switch is connected between the output terminal of the host internal detector signal circuit, the output terminal of the external detector signal circuit and the signal amplification circuit, the host internal detector signal circuit is connected to the selection electronic switch through the output terminal of the amplifier OP2, and the external detector signal circuit is electrically connected to the selection electronic switch through the resistor R31 and the filter capacitor C30.

5. The intelligent RGB digital color sensor circuit system of claim 4, wherein the signal amplification circuit includes a main signal secondary amplification circuit having an output electrically connected to the sampling unit, and an amplification switching electronic switch electrically connected to an input of the main signal secondary amplification circuit, the amplification switching electronic switch being connected to the output of the main internal detection head signal circuit and the external detection head signal circuit through a selection electronic switch, and when the external detection head is connected, the processor module cuts off the internal detection head signal sampling and selects the external detection head signal for sampling.

6. The intelligent RGB digital color sensor circuit system of claim 5, wherein an anti-interference unit is connected between the output terminal of the main signal secondary amplifying circuit and the sampling unit, the anti-interference unit being a schottky diode.

7. The circuit system according to claim 1, wherein the sampling unit comprises an AD electronic sampling control switch 1 and an AD electronic sampling control switch 2, the AD electronic sampling control switch 1 and the AD electronic sampling control switch 2 are connected in parallel, the AD electronic sampling control switch 1 and the AD electronic sampling control switch 2 are respectively electrically connected to the processor module for signal transmission, an input terminal of the AD electronic sampling control switch 1 is electrically connected to the RGB light intensity feedback circuit, and an input terminal of the AD electronic sampling control switch 2 is electrically connected to an output terminal of the detection signal selection unit.

8. The intelligent RGB digital color sensor circuit system of claim 7, wherein the output terminal of the AD electronic sampling control switch 1 is connected to a resistor R41 and electrically connected to the processor module through the resistor R41, and the output terminal of the AD electronic sampling control switch 2 is connected to a resistor R42 and electrically connected to the processor module through the resistor R42.

9. The circuit system of claim 6, 7 or 8, wherein the primary signal secondary amplifying circuit is electrically connected to the AD electronic sampling control switch 2, and the input terminal of the AD electronic sampling control switch 1 is further connected to the anti-interference unit connected in parallel to the RGB light intensity feedback circuit.

10. The intelligent RGB digital color sensor circuit system of claim 1, further comprising a human interface circuit electrically connected to the processor module, the human interface circuit being electrically connected to the power module.

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