CN113042929B - Welding seam detector circuit system - Google Patents
Welding seam detector circuit system Download PDFInfo
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- CN113042929B CN113042929B CN202110348878.4A CN202110348878A CN113042929B CN 113042929 B CN113042929 B CN 113042929B CN 202110348878 A CN202110348878 A CN 202110348878A CN 113042929 B CN113042929 B CN 113042929B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
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Abstract
The invention discloses a welding seam detector circuit system which comprises a power supply unit (2), a transmitter part and a receiver part, wherein the transmitter part comprises a transmitter voltage conversion circuit (3), a transmission main controller circuit (4), a transmission driving circuit (5), three groups of infrared transmission circuits (6), a state acquisition circuit (7) and a synchronous transmission circuit (8); the receiver part comprises a receiver voltage conversion circuit (9), a receiving main controller circuit (10), three groups of signal acquisition circuits (11), a multiplexing circuit (12), a detection filter circuit driving circuit (13), a monostable circuit (14), a synchronous receiving circuit (15) and an output driving circuit (16). The invention separates the main power supply from the transmitter and the receiver, and adds the synchronous signal between the transmitter and the receiver to enhance the anti-interference capability of the transmitter and the receiver to the outside. In addition, MCU controllers are added in the transmitter and the receiver, so that the response speed and the sensitivity of the system can be obviously improved.
Description
Technical Field
The invention belongs to the technical field of welding seam detection devices, and particularly relates to a circuit system of a welding seam detector.
Background
Welding has been developed as an important processing method in manufacturing industry, and is widely applied to the fields of aviation, aerospace, metallurgy, petroleum, automobile manufacturing, national defense and the like. In a welded product, the quality of a welding seam directly influences the service life of the product. Therefore, the size of the welding seam must be strictly controlled according to the design requirements in the production process, and the generation of various defects must be strictly controlled.
The traditional non-contact infrared welding seam detection device is realized through an analog circuit, so that the circuit is complex, electronic components are more in application, the number of external interference factors is increased, the cost is high, the response speed is low, the sensitivity is low, the detection precision is poor and the like.
Disclosure of Invention
The present invention is directed to overcoming the deficiencies of the prior art and providing a weld detector circuit system.
The invention is realized by the following technical scheme:
a weld seam detector circuit system comprises a power supply unit (2), a transmitter part and a receiver part, wherein the transmitter part comprises a transmitter voltage conversion circuit (3), a transmission main controller circuit (4), a transmission driving circuit (5), three groups of infrared transmission circuits (6), a state acquisition circuit (7) and a synchronous transmission circuit (8); the receiver part comprises a receiver voltage conversion circuit (9), a receiving main controller circuit (10), three groups of signal acquisition circuits (11), a multiplexing circuit (12), a detection filter circuit driving circuit (13), a monostable circuit (14), a synchronous receiving circuit (15) and an output driving circuit (16);
the power supply unit (2) is connected with the transmitter voltage conversion circuit (3) and the receiver voltage conversion circuit (9) and respectively supplies power to the transmitter part and the receiver part;
the transmission main controller circuit (4) is respectively connected with the transmission driving circuit (5) and the synchronous transmission circuit (8), the transmission driving circuit (5) is connected with the infrared transmission circuit (6) to realize the generation of infrared detection signals, the infrared transmission circuit (6) is also connected with the state acquisition circuit (7), and the state acquisition circuit (7) is connected with the transmission main controller circuit (4) to realize the acquisition of working state signals of three groups of infrared transmission circuits (6) through the state acquisition circuit (7) and send the acquired signals to the transmission main controller circuit (4);
the receiving main controller circuit (10) is connected with a multiplexing circuit (12), the input end of the multiplexing circuit (12) is connected with three groups of signal acquisition circuits (11), the output end of the multiplexing circuit (12) is connected with a detection filter circuit driving circuit (13), the input end of a synchronous receiving circuit (15) is connected with a synchronous sending circuit (8), the output end of the synchronous receiving circuit (15) is connected with the input ends of the receiving main controller circuit (10) and a monostable circuit (14), the input end of the monostable circuit (14) is also connected with the output end of the detection filter circuit driving circuit (13), the output end of the monostable circuit (14) is connected with the receiving main controller circuit (10), and the receiving main controller circuit (10) is also connected with an output driving circuit (16);
the three groups of signal acquisition circuits (11) acquire 24 paths of infrared light signals from a transmitter, the infrared light signals enter the multiplexing circuit (12) in parallel, a receiving main controller circuit (10) sends an address to the multiplexing circuit (12), the received infrared light signals are sequentially sent to a detection filter circuit driving circuit (13) for detection and shaping, the signals are subjected to AND operation with synchronous signals received by a synchronous receiving circuit (15), the signals are sent to a monostable circuit (14) for further pulse shaping, and the shaped signals are sent to the receiving main controller circuit (10) for receiving. The receiving main controller circuit (10) sequentially receives the 24 paths of shaped pulse signals and judges whether the object to be measured has a gap. And finally, the judgment result is received and output to the outside by the main controller circuit (10) through the output driving circuit (16).
In the technical scheme, the sending main controller circuit (4) adopts a single chip microcomputer U2, and two IO pins of the single chip microcomputer U2 are connected in parallel after being respectively connected with a resistor to serve as a Driv-LED end.
In the above technical solution, the transmission driving circuit (5) includes: a Driv-LED end series resistor on a singlechip U2 from a sending main controller circuit (4) is connected with a base electrode of a transistor T2, an emitting electrode of the T2 is grounded, an input end of a six-buffer U6 is connected to a collector electrode of the T2 after being short-circuited, an output end of the six-buffer U6 is connected to a grid electrode of an MOS tube T3 after being short-circuited, a drain electrode of the MOS tube is connected with +15V, and a source electrode is named as Drive and is connected to an infrared sending circuit (6).
In the above technical solution, the infrared transmitting circuit (6) includes: one end of each of the four groups of infrared transmitting tubes is connected with a Drive end of the sending Drive circuit (5), and the other end of each group of infrared transmitting tubes is respectively connected with a resistor and then grounded; signals C-sig 1-C-sig 4 are respectively led out of each group of infrared transmitting tubes connected in series and are used for being connected to a state acquisition circuit (7); in addition, a Drive end in the sending Drive circuit (5) is connected with a resistor and a light emitting diode in series and then is grounded for indicating the working state.
In the technical scheme, the signal input ends of the state acquisition circuits (7) are respectively connected with signals C-Sig 1-C-Sig 4 from the infrared transmission driving circuit (6), and the signal input ends of the state acquisition circuits (7) are respectively named as Sig-C1-Sig-C4 and are connected to a single chip microcomputer U2 in the transmission main controller circuit (4).
In the above technical solution, the synchronous transmission circuit (8) includes: a synchronous signal output pin SYNC on a singlechip U2 in a sending main controller circuit (4) is connected with an interface chip U3, and the output of the interface chip U3 respectively outputs SYNC + and SYNC-signals which are connected to a synchronous receiving circuit (15) of a receiver part.
In the above technical solution, the receiving main controller circuit (10) includes: and the single chip microcomputer U18 is of an Atmega16 model.
In the above technical solution, the single group of infrared signal collecting circuit (11) includes: the infrared signal acquisition circuit comprises eight groups of acquisition circuits with the same structure, and the three groups of infrared signal acquisition circuits (11) have 24 signal output ends in total.
In the above technical solution, the multiplexing circuit (12) includes: each multiplexing chip is provided with 16 input ends, and 24 input ends of the two multiplexing chips are respectively and correspondingly connected with 24 output ends of the three groups of infrared signal acquisition circuits (11); addresses A0-A3 of the two multiplexing chips are correspondingly connected with address lines A0-A3 of a single chip microcomputer U18 in a receiving main controller circuit (10), and then the single chip microcomputer U18 is used for carrying out chip selection and address selection on the two multiplexing chips to sequentially receive 24 paths of signals; the output end of each multiplexing chip is connected to the RXD receiving end of a detection filter circuit driving circuit (13).
In the above technical solution, the detection filter circuit driving circuit (13) includes operational amplifiers U12A, U12B, U13A, and U14, RXD of the detection filter circuit driving circuit (13) is connected to the positive input end of U12A through a resistor R79, the output end of U12A and the negative input end of U12A are short-circuited with a pull-down resistor R80 and connected to a resistor R22, the other end of the resistor R22 is connected to the negative input end of U12B, and a capacitor C81, a diode D11, and a potentiometer RT1 series resistor R94 are connected in parallel and then connected between the negative input end and the output end of U12B; the output end of U12B is connected with a capacitor C101, then connected with a pull-down resistor R81 and then connected with a series resistor R82 to be connected with the negative input end of U13A; a resistor R133, a capacitor C82 and a diode D12 are connected in parallel and then connected between the negative input end and the output end of the U13A, and the positive input end of the U13A is connected with a resistor R23 in an earthing mode; the output end of the U13A is connected with a resistor R129 in series, then is connected with the anode of the diode D13, and then is connected with the R4 in series and is connected with the positive input end of the U14; the resistor R134 is connected between the positive input end and the output end of the U14, the negative input end of the U14 is connected with one ends of the resistors R25, the capacitors C20 and the capacitors C113, the other ends of the resistors R25, the capacitors C20 and the capacitors C113 are grounded, the output end of the U14 is connected with the pull-up resistor R135 and is connected with the limiter diode Z8 after being connected with the resistor R26 in series, and the output end of the resistor R26 is named as RXD1.
In the above technical solution, the synchronous receiving circuit (15) includes: the interface circuit U15 and the monostable chip U16B, SYNC + and SYNC-output terminal access interface circuit U15 of synchronous transmitting circuit (8), and U15's RXD pin connects in monostable chip U16B, and U16B outputs SYNC signal.
In the above technical solution, the monostable circuit (14) includes: the output end of the AND gate U17 is connected to the monostable chip U16A, the monostable chip U16A outputs a receiver signal to be connected to a single chip U18 of the receiving main controller circuit (10).
The invention has the advantages and beneficial effects that:
the invention separates the main power supply from the transmitter and the receiver, and adds the synchronous signal between the transmitter and the receiver to enhance the anti-interference capability of the transmitter and the receiver to the outside. In addition, MCU controllers are added in the transmitter and the receiver, so that the response speed and the sensitivity of the system can be remarkably improved.
The main performance indexes of the invention are as follows: the detection mode is strip detection, and the effective detection width is 425mm; the wavelength of an emitted infrared light source is 940nm, and the frequency of pulse square waves is 100KHz; the speed of the moving object is less than or equal to 700m/min; the corresponding time of the level output signal is less than or equal to 0.5mS, and the corresponding time of the relay output signal is less than or equal to 10 mS; power supply AC220V (10%); the output signal is delayed for a regulating range of 0-10S.
Drawings
FIG. 1 is a block diagram showing the construction of a weld detector apparatus according to the present invention;
FIG. 2 is a schematic diagram of a power supply circuit;
FIG. 3 is a schematic diagram of a transmitter voltage conversion circuit;
FIG. 4 is a schematic diagram of a transmit master controller circuit;
FIG. 5 is a schematic diagram of a transmit driver circuit;
FIG. 6 is a schematic diagram of an infrared transmitting circuit;
FIG. 7 is a schematic diagram of a state acquisition circuit;
FIG. 8 is a schematic diagram of a synchronous transmission circuit;
FIG. 9 is a schematic diagram of a receiver voltage conversion circuit;
FIG. 10 is a schematic diagram of a receiver main controller circuit;
FIG. 11 is a schematic diagram of an infrared signal acquisition circuit;
FIG. 12 is a schematic diagram of a multiplexing circuit;
FIG. 13 is a schematic diagram of a detection filter circuit;
FIG. 14 is a schematic diagram of a synchronous receiving circuit;
FIG. 15 is a schematic diagram of a monostable circuit;
fig. 16 is a schematic diagram of an output driving circuit.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
As shown in fig. 1, a weld detector circuit system includes a power supply unit (2), a transmitter section and a receiver section, wherein the transmitter section includes a transmitter voltage conversion circuit (3), a transmission main controller circuit (4), a transmission drive circuit (5), three sets of infrared transmission circuits (6), a state acquisition circuit (7) and a synchronous transmission circuit (8); the receiver part comprises a receiver voltage conversion circuit (9), a receiving main controller circuit (10), three groups of signal acquisition circuits (11), a multiplexing circuit (12), a detection filter circuit driving circuit (13), a monostable circuit (14), a synchronous receiving circuit (15) and an output driving circuit (16).
The power supply unit (2) is connected to a transmitter voltage conversion circuit (3) and a receiver voltage conversion circuit (9) for powering the transmitter part and the receiver part, respectively.
The sending main controller circuit (4) is respectively connected with the sending driving circuit (5) and the synchronous sending circuit (8), the sending driving circuit (5) is connected with the infrared sending circuit (6) to achieve generation of infrared detection signals, the infrared sending circuit (6) is further connected with the state acquisition circuit (7), and the state acquisition circuit (7) is connected with the sending main controller circuit (4) to achieve collection of working state signals of the three groups of infrared sending circuits (6) through the state acquisition circuit (7) and send the collected signals to the sending main controller circuit (4).
Receive main control unit circuit (10) and be connected with multiplex circuit (12), three signal acquisition circuit of group (11) are connected to multiplex circuit (12) input, detection filter circuit drive circuit (13) are connected to multiplex circuit (12) output, the input and the synchronous transmitting circuit (8) of synchronous receiving circuit (15) are connected, the input of receiving main control unit circuit (10) and monostable circuit (14) is connected to synchronous receiving circuit (15) output, detection filter circuit drive circuit (13) output is still connected to the input of monostable circuit (14), the output of monostable circuit (14) is connected to and receives main control unit circuit (10), receive main control unit circuit (10) still with output drive circuit (16) be connected.
The specific working principle is as follows: three groups of signal acquisition circuits (11) acquire 24 paths of infrared light signals from a transmitter, the infrared light signals enter a multiplexing circuit (12) in parallel, a receiving main controller circuit (10) sends an address to the multiplexing circuit (12), the received infrared light signals are sequentially sent to a detection filter circuit driving circuit (13) for detection and shaping, the signals are in phase with synchronous signals received by a synchronous receiving circuit (15), the signals are sent to a monostable circuit (14) for further pulse shaping, and the shaped signals are sent to the receiving main controller circuit (10) for receiving. The receiving main controller circuit (10) sequentially receives the 24 paths of shaped pulse signals and judges whether the object to be measured has a gap. And finally, the receiving main controller circuit (10) outputs the judgment result to the outside through an output driving circuit (16).
The connection relationship of the circuit modules is described in detail below with reference to fig. 2-16:
as shown in fig. 2, the power supply unit (2) includes: the AC220V is connected with the J1 and connected with the input end of a transformer T1, the output end of the transformer is connected with a fast recovery fuse F1, then connected with transient suppressors (TVS) Z1, C2 and C3, then connected with a switching power supply chip U1, a voltage stabilizing diode Z2 is arranged between the output end of the switching power supply chip U1 and the ground, then connected with an inductor LX1 to output +24V, and the output is connected with a group of divider resistors R1 and R5 and connected with the power supply feedback end of the switching power supply chip U1; a capacitor C1 is connected between the power ground and the ground, and a power +24V series resistor R27 and the light-emitting diode H1 are grounded.
As shown in fig. 3, the transmitter voltage conversion circuit (3) includes: the +24V output end of the power supply unit (2) is connected with a diode D3 and a Fuse1, then connected with a transient suppressor Z3, capacitors C11 and C47, then connected with a filter FI1 and a power supply module P1, then connected with capacitors C45, C10 and C46 and a power supply chip U5, the output of the power supply chip U5 is +5V, and the output end of the power supply chip U5 is connected with a resistor R7 and a light emitting diode H4 and then grounded to be used as power supply indication.
As shown in fig. 4, the transmission master controller circuit (4) includes: the single chip microcomputer U2 (the model is Atmega 16), the single chip microcomputer is reset to be connected with R32 and C38, and pins 13 and 14 of the single chip microcomputer U2 are connected with R28 and R29 respectively and then connected in parallel to be used as a Driv-LED end;
as shown in fig. 5, the transmission driving circuit (5) includes: a Driv-LED end series resistor R8 on a single chip microcomputer U2 from a sending main controller circuit (4) is connected with a base electrode of a transistor T2, an emitting electrode of the T2 is grounded, an input end of a six-buffer U6 (type HEF 4049) is connected to a collector electrode of the T2 after being short-circuited, a series resistor R30 is connected to a grid electrode of an MOS tube T3 after an output end of the six-buffer U6 is short-circuited, a drain electrode of the MOS tube is connected with +15V, and a source electrode is named as Drive and connected to an infrared sending circuit (6).
As shown in fig. 6, the infrared transmission circuit (6) includes: the infrared emission device comprises four groups of infrared emission tubes PD1-PD24 connected in series, namely infrared emission tubes PD1, PD2, PD3, PD4, PD17 and PD18 are connected in series, infrared emission tubes PD5, PD6, PD7, PD8, PD19 and PD20 are connected in series, infrared emission tubes PD9, PD10, PD11, PD12, PD21 and PD22 are connected in series, infrared emission tubes PD13, PD14, PD15, PD16, PD23 and PD24 are connected in series, one ends of the four groups of infrared emission tubes connected in series are connected with a Drive end of a sending Drive circuit (5), and the other ends of the infrared emission tubes connected in series are respectively connected with resistors R101-R104 and then grounded; signals C-sig 1-C-sig 4 are respectively led out of each group of infrared transmitting tubes connected in series and are used for being connected to a state acquisition circuit (7); in addition, a Drive end in the sending Drive circuit (5) is connected with a resistor R93 and a light-emitting diode H5 in series and then grounded for indicating the working state.
As shown in fig. 7, the state acquisition circuit (7) includes: the resistors R46, R47, R50 and R51 and the diodes D7-D10 are respectively connected with the signals C-Sig 1-C-Sig 4 from the infrared transmission driving circuit (6), and the resistors R97-R100, the capacitor C53-C56 and the resistor R10-R13 are respectively connected with the other ends of the diodes. The other ends of the resistor R46R 47R 50R 51, the resistor R97-R100 and the capacitor C53-C56 are connected to ground. The other end of the resistor R10-R13 is connected with a limiting diode Z4-Z7 for output, and is named as sig-C1-sig-C4 and is connected to a single chip microcomputer U2 in the sending main controller circuit (4).
As shown in fig. 8, the synchronous transmission circuit (8) includes: a11-pin SYNC (SYNC is a synchronous signal output pin defined by one pin on the singlechip U2) and a pull resistor R6 are added from a singlechip U2 (the type is Atmega 6) in a transmission main controller circuit (4) to be connected with an interface chip U3, and the output of the interface chip U3 (the type is MAX 490) is respectively connected with fast recovery fuses F2 and F3 to output SYNC + and SYNC-signals and is connected with a synchronous receiving circuit (15) of a receiver part.
As shown in fig. 9, the receiver voltage conversion circuit (9) includes: the +24V output end of the power supply unit (2) is connected with a diode D5 in series and a fast recovery Fuse Fuse2 and then connected with a transient suppressor D6, a capacitor C32C 51 and a filter FI2, the other ends of the transient suppressor D6, the capacitors C32 and C51 are grounded, output parallel capacitors C52 and C33 of the filter FI2 are connected to power supply modules P2 and P3, the power supply module P2 outputs two-way voltage, and parallel capacitors C118-C121, C34 and C35 are connected to LDO power supplies U19 and U20 respectively. The power supply module P3 also outputs two-way voltages of +5V (P51) and-5V (P52), and the two-way voltages are respectively connected with the capacitors C124, C115 and C36 and the resistors R136 and R137 in parallel. One voltage end of the power module P3 is connected with the resistors R141 and H2 in series and is connected with the ground for indicating voltage.
As shown in fig. 10, the receiving main controller circuit (10) includes: the single chip microcomputer U18 (the model is Atmega 16), the reset pin of the single chip microcomputer U18 is connected with R41 and C40; one end of the circuit R91 is connected with the +5V (P51) and the other end is connected with the H6 in series and connected with the single chip microcomputer U18, one end of the circuit R140 is connected with the +5V (P51) and the other end is connected with the RED1 in series and connected with the single chip microcomputer U18; the potentiometer RT2 is connected with the singlechip U18, the amplitude limiting diode Z9 and the capacitor C144; the singlechip address line A0-A3 is connected with a pull-up resistor row RP2 and is connected with the address end A0-A3 of the multiplexing circuit (12).
As shown in fig. 11, the infrared signal collecting circuit (11) includes: the structure of the acquisition circuit is described by one of the acquisition circuits in conjunction with fig. 11: the infrared receiving tube comprises an infrared receiving tube PB1, wherein an emitter of the infrared receiving tube PB1 is connected with a resistor R54 and a capacitor C65, the other end of the C65 is connected with a capacitor C73 and a resistor R113, the other end of the capacitor C73 is connected with a resistor R33 and a grid electrode of an MOS tube T4, a source of the MOS tube T4 is connected with a resistor R121 and a capacitor C104, a drain of the MOS tube T4 is connected with a resistor R14 and a capacitor C91, the other end of the resistor R14 is connected with a resistor R105 and a capacitor C83 and is connected with +15V, the other end of the resistor R105 is connected with a collector of the infrared receiving tube PB1 and a capacitor C57, the resistors R54, R113, R121, R33, the capacitor C104, the other ends of the capacitor C57 and the capacitor C83 are grounded, and the other end of the capacitor C91 is used as an output end and is connected with a pull-down resistor R52 and is connected with an input end of a multiplexing circuit (12).
As shown in fig. 12, the multiplexing circuit (12) includes: two multiplexing chips (U7U 8) with the model number of MCP506, each multiplexing chip has 16 input ends, so that the two multiplexing chips have 32 input ends, and 24 input ends are selected to be respectively and correspondingly connected with 24 output ends in three groups of infrared signal acquisition circuits (11) (each group of infrared signal acquisition circuits has 8 output ends, and the three groups of infrared signal acquisition circuits have 24 output ends); addresses A0-A3 of the two multiplexing chips are correspondingly connected with address lines A0-A3 of a single chip microcomputer U18 in a receiving main controller circuit (10), and then the single chip microcomputer U18 is used for carrying out chip selection and address selection on the two multiplexing chips to sequentially receive 24 paths of signals; the output end of each multiplexing chip is respectively connected with a pull-down resistor R68, R73 and a capacitor C99, C100, and the other ends of the capacitors C99 and C100 are connected with the RXD receiving end of the detection filter circuit driving circuit (13) in a short circuit mode.
As shown in fig. 13, the detection filter circuit driving circuit (13) includes operational amplifiers U12A, U12B, U13A, and U14, RXD of the detection filter circuit driving circuit (13) is connected to the positive input terminal of U12A through a resistor R79, the output terminal of U12A and the negative input terminal of U12A are short-circuited with a pull-down resistor R80 and connected to a resistor R22, the other terminal of the resistor R22 is connected to the negative input terminal of U12B, and a capacitor C81, a diode D11, and a potentiometer RT1 series resistor R94 are connected in parallel and then connected between the negative input terminal and the output terminal of U12B. The output end of U12B is connected with capacitor C101, then connected with pull-down resistor R81, and then connected with series resistor R82, and connected with the negative input end of U13A. The resistor R133, the capacitor C82 and the diode D12 are connected in parallel and then connected between the negative input end and the output end of the U13A, and the positive input end of the U13A is connected with the resistor R23 in an end-to-ground mode. The output terminal of U13A is connected in series with a resistor R129 and then to the anode of diode D13, and then in series with R4 to the positive input terminal of U14. The resistor R134 is connected between the positive input end and the output end of the U14, the negative input end of the U14 is connected with one ends of the resistor R25, the capacitor C20 and the capacitor C113, the other ends of the resistor R25, the capacitor C20 and the capacitor C113 are grounded, the output end of the U14 is connected with the pull-up resistor R135, connected with the resistor R26 in series and then connected with the amplitude limiting diode Z8, and the output end of the resistor R26 is named as RXD1.
As shown in fig. 14, the synchronous receiving circuit (15) includes: an interface circuit U15 (the chip model is ADM 2490E) and a monostable chip U16B. The SYNC + and SYNC-come from a transmitter part, the SYNC + and SYNC-come from the transmitter part and are respectively connected with Z10 and Z110, a pin 3 of U15 is connected with a pull-up resistor R83 and then connected with a pin 12 of a monostable chip U16B, a pin 14 of the U16B is connected with a capacitor C116 and a resistor R138, the other end of the C116 is grounded, the other end of the R138 is connected with a pin 10 of +5V and U16B, and the pin 10 of the R138 is connected with a signal from R85 to SYNC in series.
As shown in fig. 15, the monostable circuit (14) includes: the circuit comprises an AND gate U17 and a monostable chip U16A, two input pins of the AND gate U17 are respectively connected with RXD1 of a detection filter circuit driving circuit (13) and SYNC of a synchronous receiving circuit (15), the output end of the AND gate U17 is connected with a pin 4 of the U16A, a pin 2 of the U16A is connected with a capacitor C117 and a resistor R139, the other end of the C117 is grounded, the other end of the R139 is connected with +5V, a pin 7 of the U16 is named as receiver and is connected to a single chip U18 of a receiving main controller circuit (10).
As shown in fig. 16, the output driver circuit (16) includes: the circuit comprises optocouplers U9-U11, a Relay Relay1 and transistors Q1-Q7, wherein pins 2 of the optocouplers U9-U11 are respectively connected with resistors R88-R90 in series and then connected to a single chip microcomputer U18 for receiving a main controller circuit (10). The pin 3 of the U9 is connected with pull-down resistors R2 and R3, the other end of the R3 is connected with the base electrode of the transistor Q1, the emitter electrode of the transistor Q1 is grounded, the collector electrode of the transistor Q1 is connected with the Relay Relay1, and two ends of a coil of the Relay Relay1 are connected with the D4 in parallel. Pin 3 of U10 has a series resistor R69 connected between R70 and the base of transistor Q2, the emitter of transistor Q2 and the other end of resistor R70 being connected to ground. The collector of the transistor Q2 is connected with a pull-up resistor R71 and a pull-down resistor R72 which are connected with the base of the transistor Q3Q6, and one end of the pull-up resistor R71 and the collector of the transistor Q3 are connected with +24V. The emitter of Q6 is grounded. The emitter of Q3Q6 is connected together in series with resistor R130, the other end of R130 is connected to limiter diode D16D17 and fast recovery Fuse3, pin 3 of U11 is connected in series with resistor R74 to R75 and the base of transistor Q4, and the emitter of transistor Q4 and the other end of resistor R75 are connected to ground. The collector of the transistor Q4 is connected with a pull-up resistor R76 and a pull-down resistor R77 which are connected with the base of the transistor Q5Q7, and one end of the pull-up resistor R76 and the collector of the transistor Q5 are connected with +24V. The emitter of Q7 is grounded. The emitters of Q5Q7 are connected together in series with a resistor R131, and the other end of R131 is connected to a limiter diode D18D19 and a fast recovery Fuse4.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. A weld detector circuitry, characterized by: the system comprises a power supply unit (2), a transmitter part and a receiver part, wherein the transmitter part comprises a transmitter voltage conversion circuit (3), a transmission main controller circuit (4), a transmission driving circuit (5), three groups of infrared transmission circuits (6), a state acquisition circuit (7) and a synchronous transmission circuit (8); the receiver part comprises a receiver voltage conversion circuit (9), a receiving main controller circuit (10), three groups of signal acquisition circuits (11), a multiplexing circuit (12), a detection filter circuit driving circuit (13), a monostable circuit (14), a synchronous receiving circuit (15) and an output driving circuit (16);
the power supply unit (2) is connected with the transmitter voltage conversion circuit (3) and the receiver voltage conversion circuit (9) and respectively supplies power to the transmitter part and the receiver part;
the transmission main controller circuit (4) is respectively connected with the transmission driving circuit (5) and the synchronous transmission circuit (8), the transmission driving circuit (5) is connected with the infrared transmission circuit (6) to realize the generation of infrared detection signals, the infrared transmission circuit (6) is also connected with the state acquisition circuit (7), and the state acquisition circuit (7) is connected with the transmission main controller circuit (4) to realize the acquisition of working state signals of three groups of infrared transmission circuits (6) through the state acquisition circuit (7) and send the acquired signals to the transmission main controller circuit (4);
the receiving main controller circuit (10) is connected with a multiplexing circuit (12), the input end of the multiplexing circuit (12) is connected with three groups of signal acquisition circuits (11), the output end of the multiplexing circuit (12) is connected with a detection filter circuit driving circuit (13), the input end of a synchronous receiving circuit (15) is connected with a synchronous sending circuit (8), the output end of the synchronous receiving circuit (15) is connected with the input ends of the receiving main controller circuit (10) and a monostable circuit (14), the input end of the monostable circuit (14) is also connected with the output end of the detection filter circuit driving circuit (13), the output end of the monostable circuit (14) is connected with the receiving main controller circuit (10), and the receiving main controller circuit (10) is also connected with an output driving circuit (16);
the three groups of signal acquisition circuits (11) acquire 24 paths of infrared light signals from a transmitter, the infrared light signals enter the multiplexing circuit (12) in parallel, a receiving main controller circuit (10) sends an address to the multiplexing circuit (12), the received infrared light signals are sequentially sent to a detection filter circuit driving circuit (13) for detection and shaping, the signals are in phase with synchronous signals received by a synchronous receiving circuit (15), the synchronous signals are sent to a monostable circuit (14) for further pulse shaping, the shaped signals are sent to the receiving main controller circuit (10) for receiving, the receiving main controller circuit (10) sequentially receives the 24 paths of shaped pulse signals and judges whether a detected object has a gap, and finally the receiving main controller circuit (10) outputs the judgment result to the outside through an output driving circuit (16).
2. The weld detector circuitry of claim 1, wherein: the sending main controller circuit (4) adopts a single chip microcomputer U2, and two IO pins of the single chip microcomputer U2 are respectively connected with a resistor and then connected in parallel to serve as Driv-LED ends; the receiving main controller circuit (10) adopts a singlechip U18.
3. The weld detector circuitry of claim 2, wherein: the transmission drive circuit (5) includes: a Driv-LED end series resistor on a single chip microcomputer U2 from a sending main controller circuit (4) is connected with a base electrode of a transistor T2, an emitting electrode of the T2 is grounded, an input end of a six-buffer U6 is connected with a collector electrode of the T2 after being in short circuit, an output end of the six-buffer U6 is connected with a grid electrode of an MOS tube T3 after being in short circuit, a drain electrode of the MOS tube is connected with +15V, and a source electrode is named as Drive and is connected with an infrared sending circuit (6).
4. The weld detector circuitry of claim 3, wherein: the infrared transmitting circuit (6) comprises: one end of each of the four groups of infrared transmitting tubes in series connection is connected with a Drive end of the transmitting Drive circuit (5), and the other end of each group of infrared transmitting tubes in series connection is grounded after being connected with a resistor; signals C-sig1, C-sig2, C-sig3 and C-sig4 are respectively led out of each group of infrared transmitting tubes connected in series and are used for being connected to a state acquisition circuit (7); in addition, a Drive end in the sending Drive circuit (5) is connected with a resistor and a light emitting diode in series and then is grounded for indicating the working state.
5. The weld detector circuitry of claim 4, wherein: the signal input end of the state acquisition circuit (7) is connected with signals C-Sig1, C-Sig2, C-Sig3 and C-Sig4 from the infrared transmitting circuit (6) respectively, and the signal output end of the state acquisition circuit (7) is named as Sig-C1, sig-C2, sig-C3 and Sig-C4 and is connected to a single chip microcomputer U2 in the transmitting main controller circuit (4).
6. The weld detector circuitry of claim 5, wherein: the synchronous transmission circuit (8) comprises: a synchronous signal output pin SYNC on a singlechip U2 in a sending main controller circuit (4) is connected with an interface chip U3, and the output of the interface chip U3 respectively outputs SYNC + and SYNC-signals which are connected to a synchronous receiving circuit (15) of a receiver part.
7. The weld detector circuitry of claim 2, wherein: the signal acquisition circuit (11) comprises eight groups of acquisition circuits with completely same structures; the multiplexing circuit (12) comprises: each multiplexing chip is provided with 16 input ends, and 24 input ends of the two multiplexing chips are selected to be respectively and correspondingly connected with 24 output ends of the three groups of signal acquisition circuits (11); addresses A0, A1, A2 and A3 of the two multiplexing chips are correspondingly connected with address lines A0, A1, A2 and A3 of a singlechip U18 in a receiving main controller circuit (10), and then the singlechip U18 is used for carrying out chip selection and address selection on the two multiplexing chips so that the two multiplexing chips sequentially receive 24 paths of signals; the output end of each multiplexing chip is connected to the RXD receiving end of a detection filter circuit driving circuit (13).
8. The weld detector circuitry of claim 7, wherein: the detection filter circuit driving circuit (13) comprises operational amplifiers U12A, U12B, U13A and U14, RXD of the detection filter circuit driving circuit (13) is connected with a positive input end of the U12A through a resistor R79, an output end of the U12A and a negative input end of the U12A are short-circuited with a pull-down resistor R80 and connected with a resistor R22 in parallel, the other end of the resistor R22 is connected with a negative input end of the U12B, and a capacitor C81, a diode D11 and a potentiometer RT1 series resistor R94 are connected between the negative input end and the output end of the U12B in parallel; the output end of U12B is connected with a capacitor C101, then connected with a pull-down resistor R81 and then connected with a series resistor R82 to be connected with the negative input end of U13A; a resistor R133, a capacitor C82 and a diode D12 are connected in parallel and then connected between the negative input end and the output end of the U13A, and the positive input end of the U13A is connected with a resistor R23 in an earthing mode; the output end of the U13A is connected with one end of a resistor R129, the other end of the resistor R129 is connected with the anode of the diode D13 and one end of a resistor R4, and the other end of the resistor R4 is connected with the positive input end of the U14; the resistor R134 is connected between the positive input end and the output end of the U14, the negative input end of the U14 is connected with one ends of the resistors R25, the capacitors C20 and the capacitors C113, the other ends of the resistors R25, the capacitors C20 and the capacitors C113 are grounded, the output end of the U14 is connected with the pull-up resistor R135 and is connected with the limiter diode Z8 after being connected with the resistor R26 in series, and the output end of the resistor R26 is named as RXD1.
9. The weld detector circuitry of claim 8, wherein: the synchronous receiving circuit (15) comprises: the interface circuit U15 and the monostable chip U16B, SYNC + and SYNC-output terminal access interface circuit U15 of synchronous transmitting circuit (8), and U15's RXD pin connects in monostable chip U16B, and U16B outputs SYNC signal.
10. The weld detector circuitry of claim 9, wherein: the monostable circuit (14) comprises: the output end of the AND gate U17 is connected to the monostable chip U16A, the monostable chip U16A outputs a receiver signal to be connected to a single chip U18 of the receiving main controller circuit (10).
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| CN202110348878.4A CN113042929B (en) | 2021-03-31 | 2021-03-31 | Welding seam detector circuit system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2606313A1 (en) * | 1976-02-17 | 1977-08-18 | British Steel Corp | Continuous mfr. of seam welded tube from strip - with automatic removal of transverse welds obtd. by joining coils of strip |
| CN101126739B (en) * | 2007-09-10 | 2010-09-08 | 于复生 | Welding tube soldering seam quality detection and defected welding tube automatic elimination control system |
| US8229486B2 (en) * | 2007-12-28 | 2012-07-24 | Abb Ltd. | Synchronized wireless networked system |
| CN104749988B (en) * | 2013-12-26 | 2017-12-05 | 同方威视技术股份有限公司 | Optoelectronic switch for object detection |
| CN109570808B (en) * | 2017-09-29 | 2021-08-13 | 宝山钢铁股份有限公司 | Method and device for improving weld joint quality of narrow lap welder |
| CN108804393A (en) * | 2018-04-20 | 2018-11-13 | 天津重电气自动化有限公司 | A kind of advanced big system multimode statistic algorithm |
| CN209674213U (en) * | 2018-08-20 | 2019-11-22 | 南宁职业技术学院 | SCM Based internet of things net controller |
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