CN107192745B - Capacitive sensor detection system and detection method for detecting lotus seeds - Google Patents
Capacitive sensor detection system and detection method for detecting lotus seeds Download PDFInfo
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- CN107192745B CN107192745B CN201710381827.5A CN201710381827A CN107192745B CN 107192745 B CN107192745 B CN 107192745B CN 201710381827 A CN201710381827 A CN 201710381827A CN 107192745 B CN107192745 B CN 107192745B
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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Abstract
The invention relates to a capacitive sensor detection system and a detection method for detecting lotus seeds, and the capacitive sensor detection system comprises a detection unit, a detection unit and an input/output unit, wherein the detection unit comprises a capacitive sensor module, a touch chip module, an MCU (micro control unit) controller module and a power supply processing unit, the capacitive sensor module receives a capacitive signal generated by touching and connecting the lotus seeds, the touch chip module receives the variation of the capacitive signal acquired by the capacitive sensor module and transmits the processed variation of the capacitive signal to the MCU controller module, and the MCU controller module processes the received signal and transmits the signal meeting the conditions through the input/output unit. Therefore, the invention can directly interact with the PLC or the terminal without other or auxiliary systems, has the advantages of simple structure, strong adaptability and good dynamic response, has simple method, can completely replace manual screening of the big and small lotus seeds, has accurate detection and high efficiency, can effectively save the labor cost, and avoids the loss of waste or scrapping and the like caused by misjudgment.
Description
Technical Field
The invention belongs to the technical field of electronic machinery, and particularly relates to a capacitive sensor detection system and a capacitive sensor detection method for detecting lotus seeds.
Background
Timely harvesting, fine processing and timely drying of the lotus seeds are a precondition guarantee for guaranteeing the quality of the lotus seeds and improving the economic benefit. The traditional lotus seed post-processing industry comprises two types of manual processing and mechanical processing. However, in any processing form, the operation can be roughly divided into four procedures of threshing, shelling, peeling and core pulling. During or before the four procedures, the size of the lotus seed head is usually required to be distinguished, wherein the shape of the lotus seed head is not regular, but the lotus seed head has slight characteristic difference. The prior art generally invests a great deal of labor to repeat the mechanical screening work. The method is easy to make personnel bored, the spirit is not concentrated, potential safety hazards are caused, and the problems of high working strength, poor stability of the production process, unstable production efficiency, high defective product rate and the like exist.
Based on the characteristics that the shape of the lotus seed is not regular and the characteristic difference is not obvious, an independent system or device is difficult to find in the market at present, and the repeated mechanical screening work for distinguishing the sizes of the lotus seeds by manual work can be really and effectively replaced. In view of the above-mentioned drawbacks, the present designer has made active research and innovation to create a device for distinguishing size and size of lotus seed, so that it has more industrial application value.
Disclosure of Invention
In order to solve the above technical problems, the present invention aims to provide a capacitive sensor detection system, a capacitive sensor detection method, and a capacitive sensor detection method for detecting lotus seeds, which improve the defects of time and labor waste in the differentiation of large and small heads of lotus seeds. The problems of high investment, low return and low efficiency in the traditional lotus seed post-processing industry are fully solved, the manual investment can be greatly reduced, the detection efficiency is improved, and considerable economic benefits are obtained. The technical scheme of the invention is as follows:
the capacitive sensor detection system comprises a detection unit, a detection unit and an input/output unit which are sequentially connected, wherein the detection unit comprises a capacitive sensor module, a touch chip module, an MCU (microprogrammed control unit) controller module and a power supply processing unit, the capacitive sensor module receives a capacitive signal generated by touching the lotus seeds, the touch chip module receives the capacitance signal variation acquired by the capacitive sensor module and transmits the acquired capacitance signal variation to the MCU controller module after processing, and the MCU controller module processes the received signal and transmits a signal meeting the conditions to the input/output unit.
The capacitive sensor detection system for detecting lotus seeds comprises an input/output unit, an MCU (micro control unit) controller module, a power supply processing unit and a power supply input unit, wherein the input/output unit comprises an I/O (input/output) mechanism and the power supply input mechanism, the I/O mechanism is connected with the MCU controller module, the power supply input mechanism is connected to the power supply processing unit, and the power supply input voltage is a direct-current power supply of 12-24V.
According to the capacitive sensor detection system for detecting lotus seeds, the power supply processing unit is used for processing the power supply and supplying the processed power supply to the MCU controller module and the touch chip module.
According to the capacitive sensor detection system for detecting lotus seeds, furthermore, the touch chip module is a capacitive touch control chip, secondary filtering decoupling processing is carried out on a power supply by the touch chip module, a pull-up resistor for ensuring pull-up capacity is added to an I2C communication pin of the touch chip module, and the touch chip module is provided with an overload protection circuit and a diode with an electrostatic protection effect. The capacitive sensor detection system for detecting lotus seeds comprises a detection unit, a programming interface and a USB debugging interface, wherein the programming interface and the USB debugging interface are both in communication connection with an MCU controller mechanism.
The capacitive sensor detection system for detecting the lotus seeds is characterized in that a protective shell is arranged on an outer cover of a detection unit and is divided into a front shell and a rear shell, the detection unit is arranged between the front shell and the rear shell, the detection unit and a PCB are fixed into a whole through screws, and a waterproof sealing ring is arranged between the front shell and the rear shell.
According to the capacitive sensor detection system for detecting the lotus seeds, further, the detection unit comprises a metal probe, wherein an external thread is formed at one end of the metal probe, and the metal probe is screwed on the protective shell through the external thread.
According to the capacitance type sensor detection system for detecting the lotus seeds, a cover plate for protecting the metal probe is further arranged between the metal probe and the detection unit, and the cover plate is connected to the detection unit through an adhesive tape.
The second object of the present invention is a lotus seed identification method, which employs any of the above capacitive sensor detection systems for detecting lotus seeds, and first fixes the lotus seeds to be detected, and identifies the size of the lotus seeds by sensing the pressure information transmitted by the lotus seeds and detecting the variation of the capacitive sensing signal by the capacitive sensor detection device.
The lotus seed identification method of the invention further processes the capacitance signal variation and transmits the processed capacitance signal to the MCU controller module, and the MCU controller module processes the received signal and transmits the signal for identifying the small head of the lotus seed through the input and output unit.
The lotus seed identification method of the invention, further, the pressure information transmitted by the lotus seed is sensed by the capacitive sensor detection device and the variation of the capacitive sensing signal is detected to identify the size of the lotus seed head, comprising the following steps:
-moving the detection unit forward together with the detection unit and touching the lotus seeds, the lotus seeds conducting a first action to the metal probe;
the first action is to collect a signal through the capacitive sensor module, transmit the signal to the touch chip module, confirm a first judgment result and judge whether the contacted lotus seed end has enough electric charge according to the capacitance variation;
determining a second determination result according to whether the capacitance variation is sufficient and whether the condition of triggering the capacitive sensor module is met;
obtaining a second judgment result, if the condition triggered by the capacitive sensor module is met, the second judgment result is a valid touch signal, if the condition triggered by the capacitive sensor module is not met, the second judgment result is an invalid touch signal, and confirming a third judgment result according to whether the capacitive sensor module triggers the valid signal or not;
acquiring a third judgment result, transmitting the third judgment result to the MCU module if the third judgment result is a valid touch signal, and confirming a fourth judgment result according to whether the third judgment result meets the condition that the MCU module submits the PLC or the terminal through calculation;
and obtaining a fourth judgment result, if the submitting condition is met, processing the calculation result into a high level, a low level or an ON signal and submitting the high level, the low level or the ON signal to the PLC or the terminal, and if the submitting condition is not met, not outputting the calculation result signal or processing the calculation result into an OFF signal and submitting the OFF signal to the PLC or the terminal.
By the scheme, the invention at least has the following advantages:
(1) according to the invention, the capacitance sensor is adopted to collect the capacitance signal variation generated by the lotus seed to be detected, the capacitance signal variation is processed into a signal acceptable by a PLC (programmable logic controller) or a terminal through the MCU module, and the signal can be directly interacted with the PLC or the terminal without other or auxiliary systems, so that the lotus seed detection device has the advantages of simple structure, strong adaptability and good dynamic response;
(2) the invention only needs a group of 12-24V power supply and I/O output mechanism to connect with the external mechanism, the head of the lead of the input/output unit is directly exposed and dipped with tin, thereby facilitating the subsequent installation and maintenance of the client;
(3) the independent power supply processing unit is arranged, so that the noise interference of a power supply and the like of external equipment is not easy to occur, and the working stability is high;
(4) the expansion has the burning interface and the USB debugging interface which are convenient for the later debugging and the upgrading of the client, thereby being convenient for the subsequent upgrading maintenance of the client, having strong universality and being beneficial to popularization and application.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a capacitive sensor detection system for detecting lotus seeds according to the present invention;
FIG. 2 is a schematic view of a partial structure of a capacitive sensor detection system for detecting lotus seeds according to the present invention.
The meanings of the reference symbols in the drawings are as follows.
1. Capacitance type sensor detection device 2 lotus seed
3. Clamp 4 burning interface
5 USB debugging interface 10 detecting unit
11. Protective housing 12 metal probe
13 I/O output mechanism 14 power input mechanism
15. Capacitive sensor module 16 touch chip module
17 MCU controller module 18 power supply processing unit
19. Cover plate 20 detection unit
30. Input/output unit
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1 and 2, the capacitive sensor detection system for detecting lotus seeds comprises a capacitive sensor detection device 1, wherein the capacitive sensor detection device 1 comprises a detection unit 20, a detection unit 10 and an input/output unit 30 which are sequentially connected, the detection unit 10 comprises a capacitive sensor module 15, a touch chip module 16, an MCU controller module 17 and a power supply processing unit 18, the capacitive sensor module 15 receives a capacitive signal generated by contacting the lotus seeds 2, the touch chip module 16 receives the capacitance signal variation acquired by the capacitive sensor module 15, processes the capacitance signal variation and transmits the processed capacitance signal to the MCU controller module 17, and the MCU controller module 17 processes the received signal and transmits the signal meeting the conditions through the input/output unit 30. The capacitive sensor module 15 is preferably formed by a layer of transmission lines and a layer of contact lines which are perpendicularly intersected, and can be respectively arranged on two layers of the upper surface of the PCB circuit board. The variation of the capacitive sensing signal is detected by the detection unit 10, so that the large and small lotus seeds with irregular shapes and characteristic differences can be effectively screened or distinguished.
In order to further optimize the technical effects of the present invention, in an embodiment of the present invention, on the basis of the foregoing, the input/output unit 30 includes an I/O output mechanism 13 and a power input mechanism 14, the I/O output mechanism 13 is connected to the MCU controller module 17, the power input mechanism 14 is connected to the power processing unit 18, and the power input mechanism 14 is a 12-24V power supply. The power input mechanism 14 performs filtering and other processing on a direct current power supply with voltage of 12-24V provided by the outside, and supplies the direct current power supply to the MCU controller module 17 and the touch chip module 16 for operation. The I/O output mechanism 13 can be selected according to the power requirement of the power supply provided by the terminal device, and considering the convenience of assembly, connection and welding, or the requirements of sectional area, voltage resistance, fire resistance, water resistance, aging resistance, etc. of the lead. The I/O output mechanism 13 and the power input mechanism 14 output connecting wires, and bare tin-dipped wire ends are directly reserved for customers to be directly riveted to the equipment end, so that the customer end is convenient to assemble and maintain subsequently. And connecting the parts on the PCB, and directly performing double-sided welding after punching with the PCB in consideration of cost, stability and the like.
In order to support a mutual capacitance or self-capacitance working mode, the touch chip module 16 is a capacitance type touch control chip, the touch chip module 16 needs to perform processing such as secondary filtering decoupling on a power supply provided by a system, and a pull-up resistor of 2.2-10K ohms is added to an I2C communication pin to ensure pull-up capability. In addition, in order to improve the anti-static and overload protection capabilities of the sensor system, a diode with an electrostatic protection function and a related overload protection circuit are added to the power input mechanism 14 in a matched manner, and are mainly added to the power input mechanism 14 and the I2C pin. The diode and the related circuit of the overload protection are arranged at the bottom layer of the PCB and are not overlapped with the vertical area of the capacitive sensor module 15 relative to the PCB, and a ground plane with an isolation function is arranged between the diode and the related circuit of the overload protection and the sensor. The diode and the related circuit of the overload protection are arranged at the bottom layer of the PCB and avoid the vertical area corresponding to the capacitive sensor, and the whole ground plane is arranged to effectively isolate the diode and the related circuit of the overload protection.
In order to facilitate later maintenance of a client and the like, the MCU controller is internally provided with a programming storage function and supports a USB debugging interface which is burnt and facilitates later maintenance or optimization of the client. Therefore, the detection unit 10 is configured to include a recording interface 4 and a USB debugging interface 5, and both the recording interface 4 and the USB debugging interface 5 are in communication connection with the MCU controller module 17, perform I2C communication with the touch chip module 16, and support independent I/O communication with a terminal. Because the signal level of the MCU controller module 17 is only about 3.3V, and cannot be directly connected to the 12-24V I/O port of the device, it is necessary to process the low voltage signal into a high voltage signal to control the I/O port of the PLC or the terminal device by using a voltage control device such as a MOS fet.
Referring to fig. 1, the detection unit 10 is covered with a protective case 11. The protective case 11 accommodates the detection unit 10 therein. The protection shell 11 is divided into a front shell and a rear shell, the detection unit 10 is placed between the front shell and the rear shell, and the front shell and the rear shell and a PCB (not shown in the drawing) of the detection unit 10 are fixed into a whole through screws. In order to increase the water resistance, a water-resistant sealing ring is arranged between the front shell and the rear shell.
Because 2 heads of lotus seed are less and the shape is different, fix it with the help of special fixed anchor clamps 3, lead to waiting to examine that the lotus seed can't directly contact with capacitanc sensor module 15, detecting element 20 includes metal probe 12, and metal probe 12 sets up big or small head through special shape, major part and sensor contact, and the other end is little to be met with waiting to examine lotus seed 2 and connect, plays effectual conduction. Because it is hard to hard collision with the lotus seed, metal probe 12 has the circuit damage that probably causes with the circuit contact of sensor for a long time, for the convenience of equipment and avoid destroying capacitanc sensor module 15 with the impact force that lotus seed 2 collided the production, set up an external screw thread and screw up with preceding shell at metal probe 12's major part, multiplicable glass protection apron 19 through chemical strengthening simultaneously, and paste together through double faced adhesive tape and capacitanc sensor module 15, the area increase with the contact like this, can effectively prolong the life-span of passing capacitanc sensor module 15 circuit.
The principle of the capacitive sensor detection system for detecting lotus seeds is explained below based on the present invention, and the lotus seed identification method is described in detail:
1. moving the capacitive sensor module 15 to touch the lotus seed 2, and conducting a first action to the metal probe 12 by the lotus seed 2;
2. the first action is to acquire a signal through the capacitive sensor module 15, transmit the signal to the touch chip module 16, confirm a first judgment result, and judge whether the end of the lotus seed 2 in contact has enough electric charge according to the capacitance variation;
3. determining a second determination result according to whether the capacitance variation is sufficient and whether the condition triggered by the capacitive sensor module 15 is satisfied;
4. acquiring a second judgment result, if the condition triggered by the capacitive sensor module 15 is met, the touch signal is a valid touch signal, if the condition is not met, the touch signal is an invalid touch signal, and confirming a third judgment result by whether the capacitive sensor module 15 triggers the valid signal or not;
5. acquiring a third judgment result, transmitting the third judgment result to the MCU controller module 17 if the third judgment result is a valid touch signal, and confirming a fourth judgment result according to whether the conditions that the MCU controller module 17 submits the PLC or the terminal are met through calculation;
6. and acquiring a fourth judgment result, processing the calculation result into a high level, a low level or an ON signal to be submitted to the PLC or the terminal if the submission condition is met, and not outputting the calculation result signal or processing the calculation result into an OFF signal to be submitted to the PLC or the terminal if the submission condition is not met.
According to the lotus seed identification method, the capacitive sensor detection device 1 senses the pressure information transmitted by the lotus seed 2 and detects the variation of a capacitive sensing signal to identify the size of the lotus seed 2, so that the accuracy of system identification can be effectively guaranteed, and the compatibility of the system is enhanced. The invention has a set of independent and easy-to-operate USB debugging and upgrading software, and can facilitate a user to simply and visually debug the detection sensitivity of the system in a visual slider type or digital modification mode according to the regional characteristics of lotus seeds, the difference of water content and the like, so that the accuracy of system identification can be effectively ensured, and the compatibility of the system is enhanced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a detect capacitanc sensor detecting system of lotus seeds comprises capacitanc sensor detection device (1), its characterized in that: the capacitive sensor detection device (1) comprises a detection unit (20), a detection unit (10) and an input/output unit (30) which are sequentially connected, wherein the detection unit (10) comprises a capacitive sensor module (15), a touch chip module (16), an MCU controller module (17) and a power supply processing unit (18), the capacitive sensor module (15) receives a capacitance signal generated by touching the lotus seed (2), the touch chip module (16) receives the capacitance signal variation acquired by the capacitive sensor module (15), processes the acquired capacitance signal variation and transmits the processed capacitance signal to the MCU controller module (17), the MCU controller module (17) processes the received signal and transmits a signal meeting the condition through the input/output unit (30);
the touch chip module (16) is a capacitive touch control chip, the touch chip module (16) performs secondary filtering decoupling processing on a power supply, a pull-up resistor for ensuring pull-up capacity is added on an I2C communication pin of the touch chip module (16), and the touch chip module (16) is provided with an overload protection circuit and a diode with electrostatic protection effect;
the detection unit (10) comprises a burning interface (4) and a USB debugging interface (5), and the burning interface (4) and the USB debugging interface (5) are both in communication connection with the MCU controller module (17);
the detection unit (20) comprises a metal probe (12), an external thread is arranged at one end of the metal probe (12), and the metal probe (12) is screwed on the protective shell (11) through the external thread.
2. The capacitive sensor detection system for detecting lotus seeds as claimed in claim 1, wherein: the input and output unit (30) comprises an I/O output mechanism (13) and a power input mechanism (14), the I/O output mechanism (13) is connected with the MCU controller module (17), the power input mechanism (14) is connected to the power processing unit (18), and the power input mechanism (14) is a 12-24V power supply.
3. The capacitive sensor detection system for detecting lotus seeds as claimed in claim 2, wherein: and the power supply processing unit (18) processes the power supply and then supplies the power supply to the MCU controller module (17) and the touch chip module (16).
4. The capacitive sensor detection system for detecting lotus seeds as claimed in claim 1, wherein: detection unit (10) dustcoat is equipped with protective housing (11), and protective housing (11) divide into preceding shell and backshell two parts, will detection unit (10) are put the centre of preceding shell and backshell, fix preceding shell and backshell and detection unit (10) and PCB board through the screw and are integrative be provided with waterproof sealing washer between preceding shell and the backshell.
5. The capacitive sensor detection system for detecting lotus seeds as claimed in claim 1, wherein: a cover plate (19) for protecting the metal probe (12) is arranged between the metal probe (12) and the detection unit (10), and the cover plate (19) is connected to the detection unit (10) through an adhesive tape.
6. A lotus seed identification method, which adopts the capacitive sensor detection system for detecting lotus seeds as claimed in any one of claims 1 to 5, and is characterized in that: fixing the lotus seed (2) to be detected, sensing pressure information transmitted by the lotus seed (2) through the capacitive sensor detection device (1) and detecting the variation of a capacitive sensing signal.
7. The lotus seed identification method as defined in claim 6, wherein: the method for identifying the size of the lotus seed (2) by sensing pressure information transmitted by the lotus seed (2) and detecting the variation of a capacitive sensing signal through the capacitive sensor detection device (1) comprises the following steps:
the detection unit (10) and the detection unit (20) move forwards together and touch the lotus seed (2), and the lotus seed (2) conducts a first action to the metal probe (12);
the first action is to collect a signal through the capacitive sensor module (15), transmit the signal to the touch chip module (16), confirm a first judgment result and judge whether the end part of the contacted lotus seed (2) has enough electric charge quantity according to the capacitance variation;
determining a second determination result according to whether the capacitance variation is sufficient and whether the condition triggered by the capacitive sensor module (15) is satisfied;
acquiring a second judgment result, if the condition triggered by the capacitive sensor module (15) is met, the second judgment result is a valid touch signal, if the condition triggered by the capacitive sensor module (15) is not met, the second judgment result is an invalid touch signal, and the third judgment result is confirmed by whether the capacitive sensor module (15) triggers the valid signal or not;
acquiring a third judgment result, if the third judgment result is a valid touch signal, transmitting the valid touch signal to the MCU controller module (17), and confirming a fourth judgment result according to whether the valid touch signal meets the condition that the MCU controller module (17) submits the PLC or the terminal;
and acquiring a fourth judgment result, processing the calculation result into a high level, a low level or an ON signal to submit to the PLC or the terminal if the submission condition is met, and not outputting the calculation result signal or processing the calculation result into an OFF signal to submit to the PLC or the terminal if the submission condition is not met.
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| CN201591113U (en) * | 2009-08-13 | 2010-09-29 | 周明全 | Fully-automatic high-efficiency intelligent lotus seed shucker |
| CN203140282U (en) * | 2013-02-27 | 2013-08-21 | 湖南粒粒珍湘莲有限公司 | Vibrating type lotus seed sorting device |
| CN103645355A (en) * | 2013-12-30 | 2014-03-19 | 江苏大学 | Sensor for measuring electrical parameters of plant leaves |
| CN205879875U (en) * | 2016-07-09 | 2017-01-11 | 石河子大学 | "Hami" melon maturity acoustics nondestructive test device |
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