CN110726730B - Self-adaptive transmission detection device - Google Patents
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Abstract
The invention provides a self-adaptive transmission detection device, which comprises a first laser emitting device, an image acquisition device, a light source, a main control device, a second transmission belt, a second laser emitting device, a counting display, a second laser control device, a first transmission belt, a third transmission belt and a pressure sensor, wherein the first laser emitting device is arranged on the first transmission belt; the master control device comprises a signal processing circuit, an image edge extraction device, an image edge comparison device, an integrated processor, a pressure comparator, a counter and a wireless network, the appearance of a product or part to be transmitted is accurately corrected through the image acquisition equipment and the image edge extraction device, the quality of the product or part to be transmitted is accurately corrected through the pressure sensor and the signal processing circuit, and the qualified product or part and the unqualified product or part are effectively distinguished through combination of the first laser emission device, the second laser control device, the second laser emission device and the counter.
Description
Technical Field
The invention relates to the field of electromechanics, in particular to a self-adaptive transmission detection device.
Background
At present, a transmission device only transmits transmitted articles, and the quality of the transmitted products cannot be detected accurately, quickly and efficiently, two problems in the prior art restrict the self-adaptability of the transmission device, namely, the transmission device can automatically detect the transmitted articles accurately, quickly and efficiently according to the transmitted articles, the transmission device does not need to be stopped in the detection process, or unqualified articles in the transmitted articles are prompted or removed when the transmission device operates normally, and the two problems are that the first problem ensures the detection precision of the transmission device, the misjudgment is avoided, and the second problem effectively marks or distinguishes the qualified and unqualified transmitted articles.
Disclosure of Invention
Therefore, in order to overcome the above problems, the present invention provides an adaptive transmission detection apparatus, which includes a first laser emitting device, an image capturing device, a light source, a main control device, a second transmission belt, a second laser emitting device, a counting display, a second laser control device, a first transmission belt, a third transmission belt, and a pressure sensor; the master control device comprises a signal processing circuit, an image edge extraction device, an image edge comparison device, an integrated processor, a pressure comparator, a counter and a wireless network, the appearance of a product or part to be transmitted is accurately corrected through the image acquisition equipment and the image edge extraction device, the quality of the product or part to be transmitted is accurately corrected through the pressure sensor and the signal processing circuit, and the qualified product or part and the unqualified product or part are effectively distinguished through combination of the first laser emission device, the second laser control device, the second laser emission device and the counter.
The invention provides a self-adaptive transmission detection device which comprises a first laser emitting device, an image acquisition device, a light source, a main control device, a second transmission belt, a second laser emitting device, a counting display, a second laser control device, a first transmission belt, a third transmission belt and a pressure sensor, wherein the first laser emitting device is arranged on the first transmission belt; the main control device comprises a signal processing circuit, an image edge extraction device, an image edge comparison device, an integrated processor, a pressure comparator, a counter and a wireless network.
The device comprises a counter, a first laser emitting device, an integrated processor, a first laser emitting device and a second laser emitting device, wherein a product or a part to be transmitted is placed on the first transmission belt, the first laser emitting device is arranged on the first transmission belt, the output end of the first laser emitting device is connected with the input end of the integrated processor, when the product or the part to be transmitted passes through the position below the first laser emitting device, the first laser emitting device emits a high level signal and a first trigger signal to the integrated processor, the input end of the counter is connected with the output end of the integrated processor, and the integrated processor transmits the received high level signal to the counter.
The integrated processor transmits a received first trigger signal to image acquisition equipment and a light source, the image acquisition equipment is arranged on a first transmission belt, the light source turns on the light source after receiving the first trigger signal, the image acquisition equipment acquires image information of a product or a part to be transmitted under the image acquisition equipment from the first transmission belt after receiving the first trigger signal, the output end of the image acquisition equipment is connected with the input end of an image edge extraction device, the output end of the image edge extraction device is connected with the input end of the integrated processor, the image acquisition equipment transmits the acquired image information to the image edge extraction device, the image edge extraction device performs image edge extraction on the received image information and transmits the extracted image edge information to the integrated processor, the output end of the integrated processor is connected with an image edge comparison device, the integrated processor transmits the received image edge information to an image edge comparison device, the image edge comparison device stores standard image edge information of a product or a part to be transmitted, the image edge comparison device compares the received image edge image information with the stored standard image edge information of the product or the part to be transmitted, if the image edge image information received by the image edge comparison device is consistent with the stored standard image edge information of the product or the part to be transmitted, the image edge comparison device sends a second trigger signal to the pressure sensor, if the image edge image information received by the image edge comparison device is inconsistent with the stored standard image edge information of the product or the part to be transmitted, the image edge comparison device sends a third trigger signal to a second laser control device, and a second laser emission device is arranged on a third transmission belt, and the second laser control device controls the second laser emitting device to be closed after receiving the third trigger signal, and simultaneously controls the second laser emitting device to send a low level signal to the integrated processor, the integrated processor transmits the received low level signal to the counter, and the output end of the second laser emitting device is connected with the input end of the integrated processor.
The pressure sensor is arranged on the second transmission belt, the pressure sensor starts to operate after receiving a second trigger signal, the first transmission belt transmits a product or a part to be transmitted to the second transmission belt, the output end of the pressure sensor is connected with the input end of the signal processing circuit, the output end of the signal processing circuit is connected with the input end of the integrated processor, the pressure sensor is used for detecting a pressure signal of the product or the part to be transmitted on the second transmission belt, the pressure sensor transmits the detected pressure signal to the signal processing circuit, the signal processing circuit performs signal processing on the received pressure signal and transmits the processed pressure signal to the integrated processor, the integrated processor transmits the received pressure signal to the pressure comparison device, a standard pressure range corresponding to the product or the part to be transmitted is stored in the pressure comparison device, the pressure comparison device compares the received pressure signal with a standard pressure range corresponding to the product or the part to be transmitted, if the received pressure signal received by the pressure comparison device is not in the standard pressure range corresponding to the product or the part to be transmitted, the pressure comparison device controls the second laser control device to send a fourth trigger signal, if the laser control device receives the second trigger signal after receiving the fourth trigger signal and sends the second trigger signal to the integrated processor, and sends the integrated processor a fifth trigger signal to the integrated processor, and controls the integrated processor to send the integrated processor to control device if the integrated processor to send the integrated processor, when the product or the part to be transmitted passes below the second laser transmitting device, the second laser transmitting device sends a high level signal to the integrated processor, the integrated processor transmits the received high level signal to the counter, the counter counts the product or the part to be transmitted through the received signal and transmits a count value to the counting display for displaying, and the integrated processor transmits the received image edge information and the pressure signal to the remote equipment through the wireless network.
Preferably, the counter counts the products or parts to be transmitted through the received signals, the counter comprises an and gate circuit, if the time for the products or parts to be transmitted from the lower part of the first laser emission device above the first transmission belt to the lower part of the second laser emission device above the third transmission belt is T, the counter takes the T time as a period, the received level signals are transmitted to the and gate circuit in the T period, if the result of the and gate circuit is high level, the counter adds 1 to the number of the qualified products or parts, and if the result of the and gate circuit is low level, the counter adds 1 to the number of the unqualified products or parts.
Preferably, the main control device further comprises a display and a memory, an input end of the display is connected with an output end of the integrated processor, and an input end of the memory is connected with an output end of the integrated processor; the integrated processor transmits the received image information and the received pressure signal to the display for displaying, and transmits the received image information and the received pressure signal to the storage for storing.
Preferably, the image transmitted from the image acquisition device to the image edge extraction device is defined as a two-dimensional function f (x, y), where x and y are spatial coordinates, and the image edge extraction device performs edge extraction on the received image, and the steps are as follows:
step 1: extracting a gradient magnitude of an image level detection of the image information received by the image edge extraction means, wherein G x (i, j) is the gradient amplitude of the horizontal detection of the image, g (i, j) is the gray value of the image received by the image edge extraction device, i, j is E [ x, y ∈ [ ]]Then there is, G x (i，j)＝[f(i+1，j-1)-f(i-1，j-1)]+2[f(i+1，j)-f(i-1，j)]+[f(i+1，j+1)-f(i-1，j+1)]；
Step 2: extracting gradient amplitude of image vertical detection of image information received by image edge extraction means, wherein G y (i, j) is the gradient amplitude of the vertical detection of the image, g (i, j) is the gray value of the image received by the image edge extraction device, i, j is in the range of [ x, y ]]Then there is, G y (i，j)＝[f(i-1，j+1)-f(i-1，j-1)]+2[f(i，j+1)-f(i，j-1)]+[f(i+1，j+1)-f(i+1，j-1)]；
And 3, step 3: the image gradient amplitude G (i, j) of the image information received by the image edge extraction device is obtained, if any,
and 4, step 4: the edge detection convolution kernel of the image edge extraction device is as follows:
and 5: the image edge extraction device convolves an image f (x, y) acquired by image acquisition equipment with a convolution kernel of edge detection to obtain the gradient amplitude G (x, y) of the image, and then selects a preset threshold T h Judging the amplitude if G (x, y) is greater than T h Then the set of step-like edge points (x, y) { G (x, y) } is the sought edge image.
Preferably, the pressure sensor is used for detecting a pressure signal of a product or a part to be transmitted on the second transmission belt, the acquired pressure signal is converted into a voltage signal V0, the voltage signal V0 is transmitted to the signal processing circuit, V1 is the voltage signal processed by the signal processing circuit, the signal processing circuit comprises a signal amplification unit and a signal filtering unit, the output end of the pressure sensor is connected with the input end of the signal amplification unit, the output end of the signal amplification unit is connected with the input end of the signal filtering unit, and the output end of the signal filtering unit is connected with the input end of the integrated processor.
Preferably, the signal amplifying unit includes capacitors C1 to C3, a field effect transistor T1, a transistor T2, and resistors R1 to R7.
Wherein, the output end of the pressure sensor is connected with one end of a capacitor C1, one end of a resistor R3 is grounded, one end of the resistor R3 is also connected with one end of a resistor R4, the other end of the resistor R3 is connected with one end of a resistor R2, the other end of the resistor R4 is connected with one end of the resistor R1, the other end of the resistor R4 is also connected with one end of the capacitor C2, the other end of the resistor R3 is connected with the other end of the capacitor C2, one end of a resistor R5 is connected with one end of the capacitor C2, the other end of the resistor R5 is connected with one end of a resistor R6, the other end of the capacitor C1 is connected with the other end of the resistor R1, the other end of the capacitor C1 is connected with the grid electrode of the field effect transistor T1, the other end of the resistor R2 is connected with the source electrode of the field effect transistor T1, the drain electrode of the field effect transistor T1 is connected with the base electrode of the triode T2, the drain electrode of the field effect transistor T1 is connected with one end of the resistor R7, the other end of the resistor R7 is connected with the emitting electrode of the triode T2, one end of the capacitor C3 is grounded, the other end of the capacitor C3 is connected with the other end of the resistor R7, the source electrode of the field effect transistor T1 is connected with the collector electrode of the triode T2, the collector electrode of the triode T2 is connected with the input end of the signal filtering unit, and the other end of the resistor R6 is connected with the other end of the capacitor C3.
Preferably, the signal filtering unit includes resistors R8-R10, capacitors C4-C6, and an operational amplifier A1.
The output end of the signal amplification unit is connected with the non-inverting input end of the operational amplifier A1, one end of a capacitor R8 is connected with the inverting input end of the operational amplifier A1, one end of a capacitor C4 is connected with the inverting input end of the operational amplifier A1, the other end of the capacitor C4 is connected with one end of a capacitor C5, one end of a resistor R10 at the other end of the capacitor C4 is connected, the other end of the capacitor C5 is connected with the output end of the operational amplifier A1, one end of the resistor R10 is connected with one end of a capacitor C6, one end of the capacitor C6 is grounded, the other end of the capacitor C6 is connected with the other end of the resistor R8, the other end of the resistor R8 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the other end of the capacitor C5, the other end of the capacitor C5 is connected with the input end of the integrated processor, and the signal filtering unit transmits the voltage signal V1 to the integrated processor.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention provides a self-adaptive transmission detection device which comprises a first laser emitting device, an image acquisition device, a light source, a main control device, a second transmission belt, a second laser emitting device, a counting display, a second laser control device, a first transmission belt, a third transmission belt and a pressure sensor, wherein the first laser emitting device is arranged on the first transmission belt; the main control device comprises a signal processing circuit, an image edge extraction device, an image edge comparison device, an integrated processor, a pressure comparator, a counter and a wireless network, the appearance of a product or part to be transmitted is accurately calibrated through the image acquisition equipment and the image edge extraction device, the quality of the product or part to be transmitted is accurately calibrated through the pressure sensor and the signal processing circuit, and the qualified product or part and the unqualified product or part to be transmitted are effectively distinguished by combining the first laser emission device, the second laser control device, the second laser emission device and the counter.
(2) The invention also has the advantages that the noise of the signal processing circuit is within 2.15nV, the drift is 1.85 muV/DEG C, and the signal filtering unit carries out filtering processing on the amplified voltage signal, so that the pressure detection precision is greatly improved.
Drawings
FIG. 1 is a block diagram of an adaptive transmission detection device of the present invention;
FIG. 2 is a schematic diagram of an adaptive transmission detection apparatus according to the present invention;
fig. 3 is a circuit diagram of a signal processing circuit according to the present invention.
Detailed Description
The following describes the adaptive transmission detection apparatus of the present invention in detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1-2, the adaptive transmission detection apparatus provided by the present invention includes a first laser emitting device 1, an image capturing device 2, a light source 3, a main control device 4, a second transmission belt 5, a second laser emitting device 6, a counting display 7, a second laser control device 8, a first transmission belt 9, a third transmission belt 10, and a pressure sensor; the main control device 4 includes a signal processing circuit, an image edge extraction device, an image edge comparison device, an integrated processor, a pressure comparator, a counter, and a wireless network.
The product or part to be transmitted is placed on the first conveying belt 9, the first laser emitting device 1 is arranged on the first conveying belt 9, the output end of the first laser emitting device 1 is connected with the input end of the integrated processor, when the product or part to be transmitted passes through the position below the first laser emitting device 1, the first laser emitting device 1 sends out a high level signal and a first trigger signal to the integrated processor, the input end of the counter is connected with the output end of the integrated processor, and the integrated processor transmits the received high level signal to the counter.
The integrated processor transmits the received first trigger signal to the image acquisition equipment 2 and the light source 3, the image acquisition equipment 2 is arranged on a first transmission belt 9, the light source 3 turns on the light source after receiving the first trigger signal, the image acquisition equipment 2 acquires the image information of the product or the part to be transmitted under the image acquisition equipment 2 from the first transmission belt 9 after receiving the first trigger signal, the output end of the image acquisition equipment 2 is connected with the input end of an image edge extraction device, the output end of the image edge extraction device is connected with the input end of the integrated processor, the image acquisition equipment 2 transmits the acquired image information to the image edge extraction device, the image edge extraction device extracts the image edge of the received image information and transmits the extracted image edge information to the integrated processor, the output end of the integrated processor is connected with an image edge comparison device, the integrated processor transmits the received image edge information to an image edge comparison device, the image edge comparison device stores standard image edge information of a product or a part to be transmitted, the image edge comparison device compares the received image edge image information with the standard image edge information of the product or the part to be transmitted, if the image edge image information received by the image edge comparison device is consistent with the standard image edge information of the product or the part to be transmitted, the image edge comparison device sends a second trigger signal to the pressure sensor, if the image edge image information received by the image edge comparison device is inconsistent with the standard image edge information of the product or the part to be transmitted, the image edge comparison device sends a third trigger signal to the second laser control device 8, the second laser emitting device 6 is arranged on the third transmission belt 10, the second laser control device 8 receives the third trigger signal and then controls the second laser emitting device 6 to be closed, meanwhile, the second laser emitting device 6 is controlled to send a low level signal to the integrated processor, the integrated processor transmits the received low level signal to the counter, and the output end of the second laser emitting device 6 is connected with the input end of the integrated processor.
The pressure sensor is arranged on the second conveying belt 5, the pressure sensor starts to operate after receiving a second trigger signal, the first conveying belt 9 is used for conveying a product or a part to be conveyed to the second conveying belt 5, the output end of the pressure sensor is connected with the input end of the signal processing circuit, the output end of the signal processing circuit is connected with the input end of the integrated processor, the pressure sensor is used for detecting a pressure signal of the product or the part to be conveyed on the second conveying belt 5, the pressure sensor is used for conveying the detected pressure signal to the signal processing circuit, the signal processing circuit is used for processing the received pressure signal and then conveying the processed pressure signal to the integrated processor, the integrated processor is used for conveying the received pressure signal to the pressure comparison device, a standard pressure range corresponding to the product or the part to be conveyed is stored in the pressure comparison device, the pressure comparison device compares the received pressure signal with a standard pressure range corresponding to a product or part to be transmitted and stored in the pressure comparison device, if the pressure signal received by the pressure comparison device is not in the standard pressure range corresponding to the product or part to be transmitted, the pressure comparison device controls the second laser control device 8 to send a fourth trigger signal, the second laser control device receives the fourth trigger signal and then controls the second laser emitting device 6 to be closed, meanwhile, the second laser emitting device 6 sends a low level signal to the integrated processor, the integrated processor transmits the received low level signal to the counter, if the pressure signal received by the pressure comparison device is in the standard pressure range corresponding to the product or part to be transmitted, the pressure comparison device controls the second laser control device to send a fifth trigger signal, the second laser emitting device 8 receives the fifth trigger signal and then controls the second laser emitting device 6 to be opened, when a product or a part to be transmitted passes below the second laser transmitting device 6, the second laser transmitting device 6 sends a high level signal to the integrated processor, the integrated processor transmits the received high level signal to the counter, the counter counts the product or the part to be transmitted through the received signal, the count value is transmitted to the count display 7 to be displayed, and the integrated processor transmits the received image edge information and the received pressure signal to the remote equipment through the wireless network.
In the above embodiment, the adaptive transmission detection apparatus provided by the present invention includes a first laser emitting device 1, an image capturing device 2, a light source 3, a main control device 4, a second transmission belt 5, a second laser emitting device 6, a counting display 7, a second laser control device 8, a first transmission belt 9, a third transmission belt 10, and a pressure sensor; the main control device 4 comprises a signal processing circuit, an image edge extraction device, an image edge comparison device, an integrated processor, a pressure comparator, a counter and a wireless network, the appearance of a product or part to be transmitted is accurately calibrated through the image acquisition equipment 2 and the image edge extraction device, the quality of the product or part to be transmitted is accurately calibrated through the pressure sensor and the signal processing circuit, and the qualified product or part and the unqualified product or part to be transmitted are effectively distinguished by combining the first laser emission device 1, the second laser control device 8, the second laser emission device 6 and the counter.
In the above embodiment, the first conveyor belt 9 is connected to the second conveyor belt 5, the second conveyor belt 5 is connected to the third conveyor belt 10, the third laser control device 8 is connected to the second laser emitting device 6, and the third laser control device 8 and the second laser emitting device 6 are both disposed above the third conveyor belt 10.
Furthermore, the first laser emitting device 1 stores therein distance information between the laser emitting end thereof and the first transmission belt 9, the first laser emitting device 1 is configured to monitor the distance information between the laser emitting end thereof and the first transmission belt 9, and if the distance information acquired by the first laser emitting device 1 is smaller than the stored distance information between the laser emitting end thereof and the first transmission belt 9, it indicates that a product or a part to be transmitted under the first laser emitting device 1 passes through, the first laser emitting device 1 sends a high level signal and a first trigger signal to the integrated processor.
Furthermore, the second laser emitting device 6 stores therein distance information between the laser emitting end thereof and the third conveyor belt 10, the second laser emitting device 6 is configured to monitor the distance information between the laser emitting end thereof and the third conveyor belt 10, and if the distance information acquired by the second laser emitting device 6 is smaller than the stored distance information between the laser emitting end thereof and the third conveyor belt 10, it is indicated that a product or a part to be conveyed passes under the second laser emitting device 6, and the second laser emitting device 6 sends a high level signal to the integrated processor.
Furthermore, the counter counts the products or parts to be transmitted through the received signals, the counter comprises an AND gate circuit, if the time that the products or parts to be transmitted are transmitted from the lower part of the first laser emission device 1 above the first transmission belt 9 to the lower part of the second laser emission device 6 above the third transmission belt 10 is T, the counter takes the T time as a period, the received level signals are transmitted to the AND gate circuit in the T period, if the result of the AND gate circuit is high level, the counter is the accumulation of qualified products or parts plus 1, and if the result of the AND gate circuit is low level, the counter is the accumulation of unqualified products or parts plus 1.
In the above embodiment, if the number of products or parts to be transferred is N, the total counting time of the counter is NT, and in NT time, the number of qualified products or parts counted by the counter is N, and the number of unqualified products or parts is m (m + N = N), the counting display 7 displays "qualified: n "," fail: m' are adopted.
Furthermore, the main control device 4 further comprises a display and a memory, wherein an input end of the display is connected with an output end of the integrated processor, and an input end of the memory is connected with an output end of the integrated processor; the integrated processor transmits the received image information and the received pressure signal to the display for displaying, and transmits the received image information and the received pressure signal to the storage for storing.
In the above embodiment, the integrated processor numbers the received image information and pressure signal according to the nth T cycle, for example, in the 3 rd T cycle, if the integrated processor receives only the image information, the image information is marked as 3, and if the integrated processor receives the image information and the pressure signal, the pressure signal is marked as 3. Because the image information is the image information of the unqualified product or part to be transmitted and can be conveniently rejected by labeling if the integrated processor only receives the image information, and the product or part to be transmitted is possibly qualified or unqualified if the integrated processor receives the image information and the pressure signal, but the appearance of the product or part to be transmitted, namely the edge of the image, is definitely qualified, therefore, only the pressure signal needs to be labeled at the moment so as to conveniently reject the unqualified product.
Furthermore, the display displays the image information and the pressure signals and the numbers thereof in a one-to-one correspondence mode according to N T periods, and the memory also stores the image information and the pressure signals and the numbers thereof in a one-to-one correspondence mode according to N T periods.
Further, the image transmitted from the image acquisition device 2 to the image edge extraction device is defined as a two-dimensional function f (x, y), where x and y are space coordinates, and the image edge extraction device performs edge extraction on the received image, and the steps are as follows:
step 1: extracting a gradient magnitude of an image level detection of image information received by an image edge extraction device, wherein G x (i, j) is the gradient amplitude of the horizontal detection of the image, g (i, j) is the gray value of the image received by the image edge extraction device, i, j is E [ x, y ∈ [ ]]Then, there is,
G x (i，j)＝[f(i+1，j-1)-f(i-1，j-1)]+2[f(i+1，j)-f(i-1，j)]+[f(i+1，j+1)-f(i-1，j+1)]；
step 2: extracting gradient amplitude of image vertical detection of image information received by image edge extraction means, wherein G y (i, j) is the gradient amplitude of the vertical detection of the image, g (i, j) is the gray value of the image received by the image edge extraction device, i, j is in the range of [ x, y ]]Then, there is,
G y (i，j)＝[f(i-1，j+1)-f(i-1，j-1)]+2[f(i，j+1)-f(i，j-1)]+[f(i+1，j+1)-f(i+1，j-1)]；
and step 3: the image gradient amplitude G (i, j) of the image information received by the image edge extraction device is obtained, if any,
and 4, step 4: the edge detection convolution kernel of the image edge extraction device is as follows:
and 5: the image edge extraction device convolves the image f (x, y) acquired by the image acquisition equipment 2 with the convolution kernel of the edge detection to obtain the gradient amplitude G (x, y) of the image, and then selects a preset threshold value T h Judging the amplitude if G (x, y) is greater than T h Then, the set { G (x, y) } of the step-like edge points (x, y) is the desired edge image.
As shown in fig. 3, the pressure sensor is used for detecting a pressure signal of a product or a part to be transmitted on the second transmission belt 5, converting the collected pressure signal into a voltage signal V0, and transmitting the voltage signal V0 to the signal processing circuit, V1 is a voltage signal processed by the signal processing circuit, the signal processing circuit includes a signal amplification unit and a signal filtering unit, an output end of the pressure sensor is connected with an input end of the signal amplification unit, an output end of the signal amplification unit is connected with an input end of the signal filtering unit, and an output end of the signal filtering unit is connected with an input end of the integrated processor.
Furthermore, the signal amplifying unit comprises capacitors C1-C3, a field effect transistor T1, a triode T2 and resistors R1-R7.
The output end of the pressure sensor is connected with one end of a capacitor C1, one end of a resistor R3 is grounded, one end of the resistor R3 is further connected with one end of a resistor R4, the other end of the resistor R3 is connected with one end of a resistor R2, the other end of the resistor R4 is connected with one end of a resistor R1, the other end of the resistor R4 is further connected with one end of the capacitor C2, the other end of the resistor R3 is connected with the other end of the capacitor C2, one end of a resistor R5 is connected with one end of the capacitor C2, the other end of the resistor R5 is connected with one end of a resistor R6, the other end of the capacitor C1 is connected with the other end of the resistor R1, the other end of the capacitor C1 is connected with the grid of a field-effect transistor T1, the other end of the resistor R2 is connected with the source electrode of the field-effect transistor T1, the drain electrode of the field-effect transistor T1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the emitter of the triode T2, one end of the capacitor C3 is grounded, the other end of the field-effect transistor R3 is connected with the source electrode of the collector of the resistor R2, and the collector of the filter unit of the triode T2 is connected with the collector of the triode T2.
Further, the signal filtering unit includes resistors R8-R10, capacitors C4-C6, and an operational amplifier A1.
The output end of the signal amplification unit is connected with the non-inverting input end of the operational amplifier A1, one end of a capacitor R8 is connected with the inverting input end of the operational amplifier A1, one end of a capacitor C4 is connected with the inverting input end of the operational amplifier A1, the other end of the capacitor C4 is connected with one end of a capacitor C5, one end of a resistor R10 at the other end of the capacitor C4 is connected, the other end of the capacitor C5 is connected with the output end of the operational amplifier A1, one end of the resistor R10 is connected with one end of a capacitor C6, one end of the capacitor C6 is grounded, the other end of the capacitor C6 is connected with the other end of the resistor R8, the other end of the resistor R8 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the other end of the capacitor C5, the other end of the capacitor C5 is connected with the input end of the integrated processor, and the signal filtering unit transmits the voltage signal V1 to the integrated processor.
In the above embodiment, the noise of the signal processing circuit is within 2.15nV, the drift is 1.85 μ V/° c, and the model of the operational amplifier A1 is LT1192.
In the signal amplifying unit, the capacitance value of the capacitor C1 is 100pF, the capacitance value of the capacitor C2 is 10 μ F, the capacitance value of the capacitor C3 is 100 μ F, the resistance value of the resistor R1 is 100M Ω, the resistance value of the resistor R2 is 5.1k Ω, the resistance value of the resistor R3 is 180k Ω, the resistance value of the resistor R4 is 20M Ω, the resistance value of the resistor R5 is 20M Ω, the resistance value of the resistor R6 is 15k Ω, and the resistance value of the resistor R7 is 40k Ω.
The signal amplification unit is a high-impedance amplifier, and a main body of the amplification circuit is formed by compounding a field effect tube and a transistor in terms of circuit structure, so that the noise of signals acquired by the pressure sensor can be greatly reduced, and the drift of the amplification circuit can be effectively inhibited.
In the signal amplifying unit, in the setting of the resistor and the capacitor, R4/R5 > R3 and R3 > R2, therefore, when the signal collected by the pressure sensor is transmitted to the field effect tube T1, the signal passing through the field effect tube T1 is effectively suppressed by noise.
In the signal filtering unit, R8= R9=2R10 and the capacitance C4= C5=2C6 are set, so that the signal filtering unit can filter the signal output from the signal amplifying unit.
This written description uses examples to disclose the disclosure, including the best mode, and also to enable any person skilled in the art to practice the disclosure, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
Claims (7)
1. The self-adaptive transmission detection device is characterized by comprising a first laser emitting device (1), an image acquisition device (2), a light source (3), a main control device (4), a second conveying belt (5), a second laser emitting device (6), a counting display (7), a second laser control device (8), a first conveying belt (9), a third conveying belt (10) and a pressure sensor; the main control device (4) comprises a signal processing circuit, an image edge extraction device, an image edge comparison device, an integrated processor, a pressure comparator, a counter and a wireless network;
the product or part to be transmitted is placed on the first transmission belt (9), the first laser emitting device (1) is arranged on the first transmission belt (9), the output end of the first laser emitting device (1) is connected with the input end of the integrated processor, when the product or part to be transmitted passes through the position below the first laser emitting device (1), the first laser emitting device (1) sends a high-level signal and a first trigger signal to the integrated processor, the input end of the counter is connected with the output end of the integrated processor, and the integrated processor transmits the received high-level signal to the counter;
the integrated processor transmits a received first trigger signal to the image acquisition device (2) and the light source (3), the image acquisition device (2) is arranged on the first transmission belt (9), the light source (3) turns on the light source after receiving the first trigger signal, the image acquisition device (2) acquires image information of the product or the part to be transmitted which is transmitted to the position right below the image acquisition device (2) by the first transmission belt (9) after receiving the first trigger signal, the output end of the image acquisition device (2) is connected with the input end of the image edge extraction device, the output end of the image edge extraction device is connected with the input end of the integrated processor, the image acquisition device (2) transmits the acquired image information to the image edge extraction device, the image edge extraction device performs image edge extraction on the received image information and transmits the extracted image edge information to the integrated processor, the output end of the integrated processor is connected with the image edge comparison device, the integrated processor transmits the received image edge information to the image edge comparison device, compares the received image information with the image edge information stored in the image comparison device, and compares the image information stored in the image comparison device with the standard image transmission device or the image transmission device, if the image information stored in the image transmission device is consistent with the standard product or the standard product to be transmitted, the image edge comparison device sends a second trigger signal to the pressure sensor, if the image edge image information received by the image edge comparison device is inconsistent with the standard image edge information of the product or part to be transmitted, the image edge comparison device sends a third trigger signal to the second laser control device (8), the second laser emission device (6) is arranged on the third conveyor belt (10), the second laser control device (8) controls the second laser emission device (6) to be closed after receiving the third trigger signal, and simultaneously controls the second laser emission device (6) to send a low level signal to the integrated processor, the integrated processor transmits the received low level signal to the counter, and the output end of the second laser emission device (6) is connected with the input end of the integrated processor;
the pressure sensor is arranged on the second conveying belt (5), the pressure sensor starts to operate after receiving a second trigger signal, the first conveying belt (9) transmits the product or part to be transmitted to the second conveying belt (5), the output end of the pressure sensor is connected with the input end of the signal processing circuit, the output end of the signal processing circuit is connected with the input end of the integrated processor, the pressure sensor is used for detecting a pressure signal of the product or part to be transmitted on the second conveying belt (5), the pressure sensor transmits the detected pressure signal to the signal processing circuit, the signal processing circuit performs signal processing on the received pressure signal and transmits the processed pressure signal to the integrated processor, the integrated processor transmits the received pressure signal to the pressure comparison device, a standard pressure range corresponding to the product or part to be transmitted is stored in the pressure comparison device, the pressure comparison device compares the received pressure signal with a standard pressure range corresponding to the product or part to be transmitted, the pressure comparison device receives the received pressure signal from the standard pressure range corresponding to the product or part to be transmitted, the laser processing device controls the laser emitting device to emit a fourth trigger signal to control device (6) to control the laser emitting device, and control the laser emitting device to control the laser emitting device, if the pressure signal received by the pressure comparison device is within the standard pressure range corresponding to the product or part to be transmitted, the pressure comparison device controls the second laser control device to send a fifth trigger signal, the second laser control device (8) receives the fifth trigger signal and then controls the second laser emission device (6) to be started, when the product or part to be transmitted passes through the position below the second laser emission device (6), the second laser emission device (6) sends a high-level signal to the integrated processor, the integrated processor transmits the received high-level signal to the counter, the counter counts the product or part to be transmitted through the received signal and transmits a count value to the count display (7) to be displayed, and the integrated processor transmits the received image edge information and the pressure signal to the remote equipment through the wireless network.
2. The adaptive transmission detection device according to claim 1, wherein the counter counts the products or parts to be transmitted by the received signals, the counter comprises an and gate, if the time for which the products or parts to be transmitted are transmitted from below the first laser emitting device (1) above the first conveyor belt (9) to below the second laser emitting device (6) above the third conveyor belt (10) is T, the counter transmits the received level signals to the and gate in a period of T, if the result of the and gate is high level, the counter is a sum of 1 for the number of qualified products or parts, and if the result of the and gate is low level, the counter is a sum of 1 for the number of unqualified products or parts.
3. The adaptive transmission detection device according to claim 1, wherein the master control device (4) further comprises a display and a memory, an input of the display is connected with an output of the integrated processor, and an input of the memory is connected with an output of the integrated processor; the integrated processor transmits the received image information and the received pressure signal to the display for displaying, and the integrated processor transmits the received image information and the received pressure signal to the storage for storing.
4. The adaptive transmission detection device according to claim 1, wherein the image transmitted from the image acquisition apparatus (2) to the image edge extraction device is defined as a two-dimensional function f (x, y), where x and y are spatial coordinates, and the image edge extraction device performs edge extraction on the received image, and the steps are as follows:
step 1: extracting a gradient magnitude of an image level detection of the image information received by the image edge extraction means, wherein G x (i, j) is the gradient amplitude of the horizontal detection of the image, g (i, j) is the gray value of the image received by the image edge extraction device, i, j belongs to [ x, y ]]Then, there is,
G x (i，j)＝[f(i+1，j-1)-f(i-1，j-1)]+2[f(i+1，j)-f(i-1，j)]+[f(i+1，j+1)-f(i-1，j+1)]；
step 2: extracting a gradient magnitude of image vertical detection of the image information received by the image edge extraction means, wherein G y (i, j) is the gradient amplitude of the vertical detection of the image, g (i, j) is the gray value of the image received by the image edge extraction device, i, j belongs to [ x, y ]]Then, there is,
G y (i，j)＝[f(i-1，j+1)-f(i-1，j-1)]+2[f(i，j+1)-f(i，j-1)]+[f(i+1，j+1)-f(i+1，j-1)]；
and step 3: and if the image gradient amplitude G (i, j) of the image information received by the image edge extraction device is obtained, then,
and 4, step 4: the edge detection convolution kernel of the image edge extraction device is as follows:
and 5: the image edge extraction device convolves the image f (x, y) acquired by the image acquisition equipment (2) with a convolution kernel of edge detection to obtainThe gradient magnitude G (x, y) of the image, and then a preset threshold T is selected h Judging the amplitude if G (x, y) is greater than T h Then, the set { G (x, y) } of the step-like edge points (x, y) is the desired edge image.
5. The adaptive transmission detection device according to claim 1, wherein the pressure sensor is configured to detect a pressure signal of the product or the part to be transmitted on the second conveyor belt (5), convert the collected pressure signal into a voltage signal V0, and transmit the voltage signal V0 to the signal processing circuit, V1 is the voltage signal processed by the signal processing circuit, the signal processing circuit includes a signal amplification unit and a signal filtering unit, an output end of the pressure sensor is connected to an input end of the signal amplification unit, an output end of the signal amplification unit is connected to an input end of the signal filtering unit, and an output end of the signal filtering unit is connected to an input end of the integrated processor.
6. The adaptive transmission detection device according to claim 5, wherein the signal amplification unit comprises capacitors C1-C3, a field effect transistor T1, a triode T2 and resistors R1-R7;
the output end of the pressure sensor is connected with one end of a capacitor C1, one end of a resistor R3 is grounded, one end of the resistor R3 is further connected with one end of a resistor R4, the other end of the resistor R3 is connected with one end of a resistor R2, the other end of the resistor R4 is connected with one end of the resistor R1, the other end of the resistor R4 is further connected with one end of the capacitor C2, the other end of the resistor R3 is connected with the other end of the capacitor C2, one end of a resistor R5 is connected with one end of the capacitor C2, the other end of the resistor R5 is connected with one end of a resistor R6, the other end of the capacitor C1 is connected with the other end of the resistor R1, the other end of the capacitor C1 is connected with the grid electrode of a field-effect transistor T1, the other end of the resistor R2 is connected with the source electrode of the field-effect transistor T1, the drain electrode of the field-effect transistor T1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the emitter electrode of the triode T2, one end of the capacitor C3 is grounded, the other end of the resistor R3 is connected with the source electrode of the resistor R7, the collector of the triode T2 is connected with the filter unit, and the input end of the triode T2 is connected with the filter unit of the triode T3.
7. The adaptive transmission detection device of claim 6, wherein the signal filtering unit comprises resistors R8-R10, capacitors C4-C6, and an operational amplifier A1;
the output end of the signal amplification unit is connected with the non-inverting input end of the operational amplifier A1, one end of a capacitor R8 is connected with the inverting input end of the operational amplifier A1, one end of a capacitor C4 is connected with the inverting input end of the operational amplifier A1, the other end of the capacitor C4 is connected with one end of a capacitor C5, one end of a resistor R10 at the other end of the capacitor C4 is connected, the other end of the capacitor C5 is connected with the output end of the operational amplifier A1, one end of the resistor R10 is connected with one end of a capacitor C6, one end of the capacitor C6 is grounded, the other end of the capacitor C6 is connected with the other end of the resistor R8, the other end of the resistor R8 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the other end of the capacitor C5, the other end of the capacitor C5 is connected with the input end of the integrated processor, and the signal filtering unit transmits the voltage signal V1 to the integrated processor.
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