Ultrasonic flaw detection sensor

Abstract

The utility model discloses an ultrasonic flaw detection sensor which comprises a host, and a probe and a communication connector which are connected with the host, a main control circuit, an excitation voltage modulation circuit, an ultrasonic excitation signal transmitting circuit, an ultrasonic recovery signal receiving circuit, a temperature detection circuit, a communication circuit and a power supply circuit for supplying power are arranged in the host; the master control circuit is electrically connected with the excitation voltage modulation circuit, the ultrasonic excitation signal transmitting circuit, the ultrasonic recovery signal receiving circuit, the temperature detection circuit and the communication circuit. The ultrasonic excitation signal circuit is electrically connected with the excitation voltage modulation circuit. The probe is provided with an ultrasonic transceiving piece and a temperature detection head, the ultrasonic transceiving piece is electrically connected with an ultrasonic excitation signal transmitting circuit and an ultrasonic echo signal receiving circuit, and the temperature detection head is electrically connected with a temperature detection circuit; the communication connector is electrically connected with the communication circuit. The bolt state can be detected in real time, and a detection result can be sent to a rear-end upper computer, so that the bolt state can be automatically detected in real time, and the defects of existing manual inspection are overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of metal detection, especially an ultrasonic flaw detection sensor. BACKGROUND

[0002] Many key parts of the existing large equipment need to use bolts for locking, and the current bolt of the key part of the large equipment adopts the artificial inspection maintenance means, and whether the bolt is cracked or damaged is judged by artificial observation of the bolt, so that the bolt problem cannot be found in time, and moreover, the artificial inspection cannot correctly judge the key position in the dark and narrow corner, and misjudgment exists, in addition, the existing artificial inspection generally does not detect the temperature of the bolt, and the temperature of the bolt can also reflect the state of the bolt.

[0003] In view of the above problems, it is necessary to study an ultrasonic flaw detection sensor, which can detect the state of the bolt in real time and send the detection result to the rear-end host computer, so that the real-time automatic detection of the bolt state can be realized. UTILITY MODEL CONTENT

[0004] The utility model aims at providing an ultrasonic flaw detection sensor, which can detect the state of the bolt in real time and send the detection result to the rear-end host computer, so that the real-time automatic detection of the bolt state can be realized.

[0005] In order to achieve the above purpose, the solution of the utility model is as follows:

[0006] An ultrasonic flaw detection sensor comprises a host computer, a probe and a communication connector connected with the host computer, a main control circuit, an excitation voltage modulation circuit, an ultrasonic excitation signal transmitting circuit, an ultrasonic wave recovery signal receiving circuit, a temperature detection circuit, a communication circuit and a power supply circuit for power supply are arranged in the host computer, the main control circuit is respectively connected with the excitation voltage modulation circuit, the ultrasonic excitation signal transmitting circuit, the ultrasonic wave recovery signal receiving circuit, the temperature detection circuit and the communication circuit, the ultrasonic excitation signal circuit is connected with the excitation voltage modulation circuit, the probe is provided with an ultrasonic transceiver sheet and a temperature detection head, the ultrasonic transceiver sheet is connected with the ultrasonic excitation signal transmitting circuit and the ultrasonic echo signal receiving circuit, the temperature detection head is connected with the temperature detection circuit, and the communication connector is connected with the communication circuit.

[0007] The communication circuit adopts an RS485 communication circuit.

[0008] The power supply circuit adopts a DC-DC step-down circuit.

[0009] The power supply circuit comprises diode D1, diode D3, capacitor EC1, capacitor C1, capacitor C2, capacitor C3, capacitor C4, resistor R1, resistor R2, resistor R8, resistor R9, voltage-dependent resistor RV1, inductor L1 and DC-DC switching voltage regulator U1; the positive electrode of diode D1 is electrically connected to the input end of the power supply circuit, the negative electrode of diode D1, the first end of capacitor EC1, the first end of voltage-dependent resistor RV1 and the first end of capacitor C1 are electrically connected to the VIN pin of DC-DC switching voltage regulator U1, the second end of capacitor EC1, the second end of capacitor C1 and the second end of voltage-dependent resistor RV1 are grounded, the FREQ pin of DC-DC switching voltage regulator U1 is grounded through resistor R1, the GND pin and the PAD pin of DC-DC switching voltage regulator U1 are grounded, the COMP pin of DC-DC switching voltage regulator U1 is grounded through capacitor C3 and resistor R2, the FB pin of DC-DC switching voltage regulator U1 is electrically connected to the first end of resistor R8 and the first end of resistor R9, the second end of resistor R9, the first end of capacitor C4 and the first end of inductor L1 are electrically connected to the output end of the power supply circuit, the second end of resistor R8 is grounded, the SW pin of DC-DC switching voltage regulator U1 is electrically connected to the second end of inductor L1, the negative electrode of diode D3 and the first end of capacitor C2, the BST pin of DC-DC switching voltage regulator U1 is electrically connected to the second end of capacitor C2, and the positive electrode of diode D3 is grounded.

[0010] The excitation voltage modulation circuit comprises a diode D2, a triode Q6, an inductor L2, a capacitor C6, a capacitor C7, a resistor R7, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R16 and a boost converter U3; the IN pin of the boost converter U3, the first end of the inductor L2 and the first end of the capacitor C6 are electrically connected to the input end of the excitation voltage modulation circuit, the EN pin of the boost converter U3 is electrically connected to the enable end of the excitation voltage modulation circuit, the GND pin of the boost converter U3 is grounded, the FB pin of the boost converter U3 is electrically connected to the first end of the resistor R7, the SW pin of the boost converter U3 is electrically connected to the second end of the inductor L2 and the anode of the diode D2, the cathode of the diode D2, the first end of the resistor R13, the first end of the capacitor C7 and the first end of the resistor R12 are electrically connected to the output end of the excitation voltage modulation circuit, the second end of the resistor R13 is electrically connected to the second end of the resistor R7 and the first end of the resistor R16, the second end of the resistor R16 is electrically connected to the collector of the triode Q6, the base of the triode Q6 is electrically connected to the first end of the resistor R10 and the first end of the resistor R11, the second end of the resistor R10 is electrically connected to the modulation end of the excitation voltage modulation circuit, the second end of the resistor R11, the second end of the resistor R12, the second end of the capacitor C7 and the emitter of the triode Q6 are grounded; the input end of the excitation voltage modulation circuit is electrically connected to the output end of the power supply circuit, the output end of the excitation voltage modulation circuit is electrically connected to the ultrasonic excitation signal transmitting circuit, and the enable end and the modulation end of the excitation voltage modulation circuit are respectively electrically connected to the master control circuit.

[0011] The ultrasonic excitation signal transmitting circuit comprises a capacitor C27, a capacitor C52, a resistor R36, a resistor R38, a resistor R39, a resistor R51, a resistor R52, a resistor R58, a resistor R59, a bidirectional diode D4, a bidirectional diode D5 and a MOSFET driver U4; a first end of the resistor R36 is electrically connected to a power supply end of the ultrasonic excitation signal transmitting circuit, a second end of the resistor R36 and a first end of the capacitor C27 are electrically connected to a VDD pin of the MOSFET driver U4, an IN pin of the MOSFET driver U4 is electrically connected to a first end of the resistor R38 and a first end of the resistor R39, a second end of the resistor R38 is electrically connected to a control end of the ultrasonic excitation signal transmitting circuit, a GND pin of the MOSFET driver U4, a second end of the capacitor C27 and a second end of the resistor R39 are grounded, a pin of the MOSFET driver U4 is electrically connected to a first end of the bidirectional diode D5, a second end of the bidirectional diode D5 is electrically connected to a first end of the capacitor C52 and a first end of the resistor R51, a second end of the capacitor C52 is electrically connected to a first end of the resistor R52 and a first end of the resistor R58, a second end of the resistor R58 and a second end of the bidirectional diode D4 are electrically connected to a first output end of the ultrasonic excitation signal transmitting circuit, the second end of the bidirectional diode D4 and a first end of the resistor R59 are electrically connected to a second output end of the ultrasonic excitation signal transmitting circuit, a second end of the resistor R59, a second end of the resistor R51 and a second end of the resistor R52 are grounded; the power supply end of the ultrasonic excitation signal transmitting circuit is electrically connected to an output end of the excitation voltage modulation circuit, the control end of the ultrasonic excitation signal transmitting circuit is electrically connected to the main control circuit, and the first output end and the second output end of the ultrasonic excitation signal transmitting circuit are respectively electrically connected to two ends of the ultrasonic transceiving sheet.

[0012] The ultrasonic echo signal receiving circuit adopts a two-stage signal amplification circuit.

[0013] The ultrasonic echo signal receiving circuit comprises a capacitor C9, a capacitor C11, a capacitor C16, a capacitor C19, a capacitor C20, a capacitor C23, a capacitor C28, a capacitor C29, a resistor R3, a resistor R4, a resistor R6, a resistor R17, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R26, a resistor R28, a piezoresistor RV2, an operational amplifier U5A and an operational amplifier U5B; a first end of the capacitor C16 and a first end of the capacitor C19 are electrically connected to a first input end and a second input end of the ultrasonic echo signal receiving circuit respectively, a second end of the capacitor C16 is electrically connected to a first end of the resistor R22, a second end of the resistor R22 is electrically connected to a non-inverting input end of the operational amplifier U5B and a first end of the resistor R3, a second end of the resistor R3 is electrically connected to a first end of the resistor R19 and a first end of the resistor R20, a second end of the resistor R20 is electrically connected to a first end of the capacitor C9, a first end of the resistor R6, a power supply end of the operational amplifier U5B and a power supply end of the operational amplifier U5A, a second end of the resistor R6 is electrically connected to a power supply end of the ultrasonic echo signal receiving circuit, a second end of the capacitor C9 and a second end of the resistor R19 are grounded, a second end of the resistor R26 is electrically connected to an inverting input end of the operational amplifier U5B, a first end of the resistor R4 and a first end of the capacitor C28, an output end of the operational amplifier U5B is electrically connected to a second end of the resistor R4, a second end of the capacitor C28 and a non-inverting input end of the operational amplifier U5A, an inverting input end of the operational amplifier U5A is electrically connected to a first end of the resistor R28, a first end of the resistor R17 and a first end of the capacitor C29, a second end of the resistor R28 is grounded through the capacitor C28, an output end of the operational amplifier U5A is electrically connected to a first end of the resistor R21, a second end of the resistor R17 and a second end of the capacitor C29, a grounding end of the operational amplifier U5A and a grounding end of the operational amplifier U5B are grounded, a second end of the resistor R21, a first end of the piezoresistor RV2 and a first end of the capacitor C23 are electrically connected to an output end of the ultrasonic echo signal receiving circuit, a second end of the piezoresistor RV2 and a second end of the capacitor C23 are grounded; the first input end and the second input end of the ultrasonic echo signal receiving circuit are electrically connected to two ends of the ultrasonic transceiving sheet, the power supply end of the ultrasonic echo signal receiving circuit is electrically connected to an output end of the power supply circuit, and the output end of the ultrasonic echo signal receiving circuit is electrically connected to the main control circuit.

[0014] The temperature detection circuit comprises a resistor R15, a resistor R31, a pressure-sensitive resistor RV4 and a capacitor C31; a first end of the resistor R31 is electrically connected to an output end of the temperature detection circuit, a second end of the resistor R31, a first end of the resistor R15, a first end of the pressure-sensitive resistor RV4 and a first end of the capacitor C31 are electrically connected to a first input end of the temperature detection circuit, a second end of the resistor R15 is electrically connected to a power supply end of the temperature detection circuit, a second end of the capacitor C31 and a second end of the pressure-sensitive resistor RV4 are electrically connected to a second input end of the temperature detection circuit and grounded; the power supply end of the temperature detection circuit is electrically connected to an output end of a power supply circuit, and the first input end and the second input end of the temperature detection circuit are respectively electrically connected to two ends of a temperature detection head.

[0015] The input end of the excitation voltage modulation circuit, the power supply end of the ultrasonic echo signal receiving circuit and the power supply end of the temperature detection circuit are electrically connected to the output end of the power supply circuit through an electronic switch circuit; the input end of the electronic switch circuit is electrically connected to the output end of the power supply circuit, the output end of the electronic switch circuit is electrically connected to the input end of the excitation voltage modulation circuit, the power supply end of the ultrasonic echo signal receiving circuit and the power supply end of the temperature detection circuit, and the control end of the electronic switch circuit is electrically connected to the main control circuit.

[0016] After the above scheme is adopted, when the ultrasonic flaw detection sensor is used, the user fixes the probe on the bolt to be detected through the coupling agent, and the communication connector is connected in communication with the host computer at the rear end; wherein the main control circuit of the host of the ultrasonic flaw detection sensor emits the ultrasonic excitation signal and receives the ultrasonic echo signal through the excitation voltage modulation circuit, the ultrasonic excitation signal emitting circuit, each ultrasonic signal receiving circuit and the ultrasonic transceiver piece of the probe, so as to realize the ultrasonic flaw detection of the bolt and further realize the detection of whether the bolt is cracked and damaged; moreover, the main control circuit of the host also detects the temperature of the bolt through the temperature detection circuit and the temperature detection head of the probe; and furthermore, the main control circuit of the host sends whether the bolt is cracked and damaged and the temperature of the bolt to the host computer in real time through the communication circuit and the communication connector, so that the host computer can monitor the state of the bolt in real time, thereby realizing the real-time automatic detection of the state of the bolt and overcoming the deficiencies brought by manual inspection. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structural schematic diagram of the utility model.

[0018] Fig. 2 It is a local structural schematic diagram of the probe of the utility model.

[0019] Fig. 3 It is a principle block diagram of the utility model.

[0020] Fig. 4 It is a circuit principle diagram of the main body of the utility model. DETAILED DESCRIPTION

[0021] In order to further explain the technical scheme of the utility model, the utility model will be described in detail below through specific embodiments.

[0022] As shown in Figs. 1 to 4 The utility model discloses an ultrasonic flaw detection sensor, it includes host computer 1 and with host computer 1 connects probe 2 and communication connector 3, host computer 1 is equipped with main control circuit 11, excitation voltage modulation circuit 12, ultrasonic wave excitation signal transmitting circuit 13, ultrasonic wave recovery signal receiving circuit, temperature detection circuit 15, communication circuit 16 and the power supply circuit 17 for power supply, main control circuit 11 is connected with excitation voltage modulation circuit 12, ultrasonic wave excitation signal transmitting circuit 13, ultrasonic wave recovery signal receiving circuit, temperature detection circuit 15 and communication circuit 16 respectively, and ultrasonic wave excitation signal circuit is connected with excitation voltage modulation circuit 12, probe 2 is equipped with ultrasonic wave transceiver sheet 21 and temperature detection head 22, and ultrasonic wave transceiver sheet 21 is connected with ultrasonic wave excitation signal transmitting circuit 13 and ultrasonic wave echo signal receiving circuit 14, and temperature detection head 22 is connected with temperature detection circuit 15, and communication connector 3 is connected with communication circuit 16.

[0023] The ultrasonic flaw detection sensor of the utility model uses, and the user fixes probe 2 on the bolt of detection through coupling agent, and communication connector 3 is connected with the host computer communication of rear end, wherein the main control circuit 11 of host computer 1 of the ultrasonic flaw detection sensor of the utility model is through excitation voltage modulation circuit 12, ultrasonic wave excitation signal transmitting circuit 13 each ultrasonic wave recovery signal receiving circuit cooperation probe 2's ultrasonic wave transceiver sheet 21 to carry out the transmission of ultrasonic wave excitation signal and the reception of ultrasonic wave echo signal, to realize the ultrasonic flaw detection of bolt, and further realize the detection of whether bolt has cracking damage, and the main control circuit 11 of host computer 1 is still through temperature detection circuit 15 cooperation probe 2's temperature detection head 22 to carry out temperature detection to bolt, and the main control circuit 11 of host computer 1 is through communication circuit 16 cooperation communication connector 3 to send whether bolt has cracking damage and the temperature of bolt to host computer in real time, so that host computer can monitor the state of bolt in real time, to realize the real-time automatic detection of bolt state, and overcome the deficiency brought by artificial inspection.

[0024] In the embodiment of the utility model, the main control circuit 11 can adopt single-chip microcomputer circuit, specifically, the main control circuit 11 can adopt the main control chip U2 of model STM32F302CBT6, and the communication circuit 16 can adopt RS485 communication circuit, so that one port of host computer can cascade control multiple ultrasonic flaw detection sensors, and reduce the port occupation of host computer.

[0025] In the embodiment of the utility model, the power supply circuit 17 adopts DC-DC step-down circuit, specifically, the power supply circuit 17 includes diode D1, diode D3, capacitor EC1, capacitor C1, capacitor C2, capacitor C3, capacitor C4, resistance R1, resistance R2, resistance R8, resistance R9, piezoresistance RV1, inductance L1 and DC-DC switch step-down voltage regulator U1, the model of DC-DC switch step-down voltage regulator U1 can be MP4560DN, the positive pole of diode D1 is electrically connected with the input end of power supply circuit 17, the negative pole of diode D1, the first end of capacitor EC1, the first end of piezoresistance RV1 and the first end of capacitor C1 are electrically connected with the VIN foot of DC-DC switch step-down voltage regulator U1, the second end of capacitor EC1, the second end of capacitor C1 and the second end of piezoresistance RV1 are grounded, the FREQ foot of DC-DC switch step-down voltage regulator U1 is grounded through resistance R1, the GND foot and PAD foot of DC-DC switch step-down voltage regulator U1 are grounded, the COMP foot of DC-DC switch step-down voltage regulator U1 is grounded through capacitor C3 and resistance R2, the FB foot of DC-DC switch step-down voltage regulator U1 is electrically connected with the first end of resistance R8 and the first end of resistance R9, the second end of resistance R9, the first end of capacitor C4 and the first end of inductance L1 are electrically connected with the output end of power supply circuit 17, the second end of resistance R8 is grounded, the SW foot of DC-DC switch step-down voltage regulator U1 is electrically connected with the second end of inductance L1, the negative pole of diode D3 and the first end of capacitor C2, the BST foot of DC-DC switch step-down voltage regulator U1 is electrically connected with the second end of capacitor C2, and the positive pole of diode D3 is grounded, wherein, diode D1 can play the role of anti-reverse connection, and the output voltage of power supply circuit 17 can be 3.3V.

[0026] In the embodiment of the utility model, the excitation voltage modulation circuit 12 can include diode D2, triode Q6, inductance L2, capacitor C6, capacitor C7, resistance R7, resistance R10, resistance R11, resistance R12, resistance R13, resistance R16 and boost converter U3, the model of boost converter U3 can be MP1540, the IN foot of boost converter U3, the first end of inductance L2 and the first end of capacitor C6 are electrically connected the input end of excitation voltage modulation circuit 12, the EN foot of boost converter U3 is electrically connected the enable end of excitation voltage modulation circuit 12, the GND foot of boost converter U3 is grounded, the FB foot of boost converter U3 is electrically connected the first end of resistance R7, the SW foot of boost converter U3 is electrically connected the second end of inductance L2 and the anode of diode D2, the cathode of diode D2, the first end of resistance R13, the first end of capacitor C7 and the first end of resistance R12 are electrically connected the output end of excitation voltage modulation circuit 12, the second end of resistance R13 is electrically connected the second end of resistance R7 and the first end of resistance R16, the second end of resistance R16 is electrically connected the collector of triode Q6, the base of triode Q6 is electrically connected the first end of resistance R10 and the first end of resistance R11, the second end of resistance R10 is electrically connected the modulation end of excitation voltage modulation circuit 12, the second end of resistance R11, the second end of resistance R12, the second end of capacitor C7 and the emitter of triode Q6 are grounded, the input end of excitation voltage modulation circuit 12 is electrically connected the output end of power supply circuit 17, the output end of excitation voltage modulation circuit 12 is electrically connected ultrasonic excitation signal transmitting circuit 13, and the enable end and modulation end of excitation voltage modulation circuit 12 are electrically connected main control circuit 11 respectively, wherein, main control circuit 11 controls whether excitation voltage modulation circuit 12 works by controlling the enable end voltage of excitation voltage modulation circuit 12, and main control circuit 11 modulates the output end voltage of excitation voltage modulation circuit 12 by adjusting the modulation end voltage of excitation voltage modulation circuit 12, in addition, triode Q6 can play the protection role of main control circuit 11, when the output voltage of excitation voltage modulation circuit 12 is too high, triode Q6 plays the isolation role and avoids the main control chip U2 of main control circuit 11 from being burnt out.

[0027] In the embodiment of the utility model, the ultrasonic excitation signal transmitting circuit 13 includes the capacitor C27, capacitor C52, resistance R36, resistance R38, resistance R39, resistance R51, resistance R52, resistance R58, resistance R59, bidirectional diode D4, bidirectional diode D5 and MOSFET driver U4, the model of MOSFET driver U4 can be MCP1416T;The first end of resistance R36 is electrically connected with the power supply end of ultrasonic excitation signal transmitting circuit 13, the second end of resistance R36 and the first end of capacitor C27 are electrically connected with the VDD pin of MOSFET driver U4, the IN pin of MOSFET driver U4 is electrically connected with the first end of resistance R38 and the first end of resistance R39, the second end of resistance R38 is electrically connected with the control end of ultrasonic excitation signal transmitting circuit 13, the GND pin of MOSFET driver U4, the second end of capacitor C27 and the second end of resistance R39 are grounded, the pin of MOSFET driver U4 is electrically connected with the first end of bidirectional diode D5, the second end of bidirectional diode D5 is electrically connected with the first end of capacitor C52 and the first end of resistance R51, the second end of capacitor C52 is electrically connected with the first end of resistance R52 and the first end of resistance R58, the second end of resistance R58 and the second end of bidirectional diode D4 are electrically connected with the first output end of ultrasonic excitation signal transmitting circuit 13, the second end of bidirectional diode D4 and the first end of resistance R59 are electrically connected with the second output end of ultrasonic excitation signal transmitting circuit 13, the second end of resistance R59, the second end of resistance R51 and the second end of resistance R52 are grounded;The power supply end of ultrasonic excitation signal transmitting circuit 13 is electrically connected with the output end of excitation voltage modulation circuit 12, the control end of ultrasonic excitation signal transmitting circuit 13 is electrically connected with main control circuit 11, and the first output end and the second output end of ultrasonic excitation signal transmitting circuit 13 are electrically connected with both ends of ultrasonic transceiver sheet 21 respectively. Wherein, the output end voltage of excitation voltage modulation circuit 12 determines the voltage size of the excitation signal that ultrasonic excitation signal transmitting circuit 13 excites on ultrasonic transceiver sheet 21, and main control circuit 11 inputs PWM signal to the control end of ultrasonic excitation signal transmitting circuit 13 to control the frequency and duty ratio of excitation signal.

[0028] In the embodiment of the utility model, the ultrasonic echo signal receiving circuit 14 adopts two-stage signal amplification circuit, specifically, the ultrasonic echo signal receiving circuit 14 includes capacitor C9, capacitor C11, capacitor C16, capacitor C19, capacitor C20, capacitor C23, capacitor C28, capacitor C29, resistance R3, resistance R4, resistance R6, resistance R17, resistance R19, resistance R20, resistance R21, resistance R22, resistance R26, resistance R28, piezoresistance RV2, operational amplifier U5A and operational amplifier U5B, the first end of capacitor C16 and the first end of capacitor C19 are electrically connected with the first input end and the second input end of ultrasonic echo signal receiving circuit 14 respectively, the second end of capacitor C16 is electrically connected with the first end of resistance R22, the second end of resistance R22 is electrically connected with the non-inverting input end of operational amplifier U5B and the first end of resistance R3, the second end of resistance R3 is electrically connected with the first end of resistance R19 and the first end of resistance R20, the second end of resistance R20 is electrically connected with the first end of capacitor C9, the first end of resistance R6, the power supply end of operational amplifier U5B and the power supply end of operational amplifier U5A, the second end of resistance R6 is electrically connected with the power supply end of ultrasonic echo signal receiving circuit 14, the second end of capacitor C9 and the second end of resistance R19 are grounded, the second end of resistance R26 is electrically connected with the inverting input end of operational amplifier U5B, the first end of resistance R4 and the first end of capacitor C28, the output end of operational amplifier U5B is electrically connected with the second end of resistance R4, the second end of capacitor C28 and the non-inverting input end of operational amplifier U5A, the inverting input end of operational amplifier U5A is electrically connected with the first end of resistance R28, the first end of resistance R17 and the first end of capacitor C29, the second end of resistance R28 is grounded through capacitor C28, the output end of operational amplifier U5A is electrically connected with the first end of resistance R21, the second end of resistance R17 and the second end of capacitor C29, the grounding end of operational amplifier U5A and the grounding end of operational amplifier U5B are grounded, the second end of resistance R21, the first end of piezoresistance RV2 and the first end of capacitor C23 are electrically connected with the output end of ultrasonic echo signal receiving circuit 14, the second end of piezoresistance RV2 and the second end of capacitor C23 are grounded, the first input end and the second input end of ultrasonic echo signal receiving circuit 14 are electrically connected with the two ends of ultrasonic transceiver sheet 21, the power supply end of ultrasonic echo signal receiving circuit 14 is electrically connected with the output end of power supply circuit 17, the output end of ultrasonic echo signal receiving circuit 14 is electrically connected with main control circuit 11, wherein the echo signal received by ultrasonic transceiver sheet 21 is input into main control circuit 11 after two-stage signal amplification by ultrasonic echo signal receiving circuit 14.

[0029] In the embodiment of the utility model, the temperature detection circuit 15 includes resistance R15, resistance R31, pressure resistance RV4 and capacitor C31, the first end of resistance R31 is electrically connected with the output end of temperature detection circuit 15, the second end of resistance R31, the first end of resistance R15, the first end of pressure resistance RV4 and the first end of capacitor C31 are electrically connected with the first input end of temperature detection circuit 15, the second end of resistance R15 is electrically connected with the power supply end of temperature detection circuit 15, the second end of capacitor C31 and the second end of pressure resistance RV4 are electrically connected with the second input end of temperature detection circuit 15 and grounded, the power supply end of temperature detection circuit 15 is electrically connected with the output end of power supply circuit 17, and the first input end and the second input end of temperature detection circuit 15 are respectively electrically connected with the two ends of temperature detection head 22. Wherein, temperature detection head 22 can adopt thermistor, the resistance of temperature detection head 22 changes with temperature, and then the output voltage of temperature detection circuit 15 changes correspondingly.

[0030] In the embodiment of the utility model, the input end of excitation voltage modulation circuit 12, the power supply end of ultrasonic echo signal receiving circuit 14 and the power supply end of temperature detection circuit 15 can be electrically connected with the output end of power supply circuit 17 through electronic switch circuit 18, the input end of electronic switch circuit 18 is electrically connected with the output end of power supply circuit 17, the output end of electronic switch circuit 18 is electrically connected with the input end of excitation voltage modulation circuit 12, the power supply end of ultrasonic echo signal receiving circuit 14 and the power supply end of temperature detection circuit 15, and the control end of electronic switch circuit 18 is electrically connected with main control circuit 11. Wherein, main control circuit 11 can control excitation voltage modulation circuit 12, ultrasonic excitation signal transmitting circuit 13, ultrasonic echo signal receiving circuit 14 and temperature detection circuit 15 to work regularly, when excitation voltage modulation circuit 12, ultrasonic excitation signal transmitting circuit 13, ultrasonic echo signal receiving circuit 14 and temperature detection circuit 15 do not work, main control circuit 11 controls electronic switch circuit 18 to disconnect, so that excitation voltage modulation circuit 12, ultrasonic excitation signal transmitting circuit 13, ultrasonic echo signal receiving circuit 14 and temperature detection circuit 15 are powered off, thereby reducing power consumption. The electronic switch circuit 18 can include resistance R18, resistance R23 and MOS tube Q1, the first end of resistance R18 and the source electrode of MOS tube Q1 are electrically connected with the input end of electronic switch circuit 18, the drain electrode of MOS tube Q1 is electrically connected with the output end of electronic switch circuit 18, the gate electrode of MOS tube Q1 is connected with the second end of resistance R18 and the first end of resistance R23, and the second end of resistance R23 is connected with the control end of electronic switch circuit 18.

[0031] In the embodiment of the utility model, the probe 2 can be provided with a metal shell 23, which can be made of aluminum alloy material, and the ultrasonic transceiver sheet 21 and the temperature detection head 22 are accommodated in the metal shell 23 and abut against the same end surface of the metal shell 23.

[0032] The above embodiments and drawings are not intended to limit the product form and style of the present application, and any appropriate changes or modifications made by those skilled in the art shall be considered as not departing from the patent scope of the present application.

Claims

1. An ultrasonic flaw detection sensor, characterized by: The host, the probe connected with the host and the communication connector; The host is provided with a main control circuit, an excitation voltage modulation circuit, an ultrasonic excitation signal transmitting circuit, an ultrasonic echo signal receiving circuit, a temperature detecting circuit, a communication circuit and a power supply circuit; the main control circuit is electrically connected with the excitation voltage modulation circuit, the ultrasonic excitation signal transmitting circuit, the ultrasonic echo signal receiving circuit, the temperature detecting circuit and the communication circuit respectively; the ultrasonic excitation signal circuit is electrically connected with the excitation voltage modulation circuit; The probe is provided with an ultrasonic transceiver and a temperature detecting head; the ultrasonic transceiver is electrically connected with the ultrasonic excitation signal transmitting circuit and the ultrasonic echo signal receiving circuit; the temperature detecting head is electrically connected with the temperature detecting circuit; The communication connector is electrically connected with the communication circuit.

2. The ultrasonic flaw detection sensor of claim 1, wherein: The communication circuit adopts an RS485 communication circuit.

3. The ultrasonic flaw detection sensor of claim 1, wherein: The power supply circuit adopts a DC-DC voltage reduction circuit.

4. The ultrasonic flaw detection sensor of claim 3, wherein: The power supply circuit comprises a diode D1, a diode D3, a capacitor EC1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, a resistor R2, a resistor R8, a resistor R9, a pressure sensitive resistor RV1, an inductor L1 and a DC-DC switch voltage reduction stabilizer U1. The positive pole of the diode D1 is electrically connected with the input end of the power supply circuit; the negative pole of the diode D1, the first end of the capacitor EC1, the first end of the pressure sensitive resistor RV1 and the first end of the capacitor C1 are electrically connected with the VIN pin of the DC-DC switch voltage reduction stabilizer U1; the second end of the capacitor EC1, the second end of the capacitor C1 and the second end of the pressure sensitive resistor RV1 are grounded; the FREQ pin of the DC-DC switch voltage reduction stabilizer U1 is grounded through the resistor R1; the GND pin and the PAD pin of the DC-DC switch voltage reduction stabilizer U1 are grounded; the COMP pin of the DC-DC switch voltage reduction stabilizer U1 is grounded through the capacitor C3 and the resistor R2; the FB pin of the DC-DC switch voltage reduction stabilizer U1 is electrically connected with the first end of the resistor R8 and the first end of the resistor R9; the second end of the resistor R9, the first end of the capacitor C4 and the first end of the inductor L1 are electrically connected with the output end of the power supply circuit; the second end of the resistor R8 is grounded; the SW pin of the DC-DC switch voltage reduction stabilizer U1 is electrically connected with the second end of the inductor L1, the negative pole of the diode D3 and the first end of the capacitor C2; the BST pin of the DC-DC switch voltage reduction stabilizer U1 is electrically connected with the second end of the capacitor C2; the positive pole of the diode D3 is grounded.

5. The ultrasonic flaw detection sensor of claim 1, wherein: The excitation voltage modulation circuit comprises a diode D2, a triode Q6, an inductor L2, a capacitor C6, a capacitor C7, a resistor R7, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R16 and a voltage booster U3. The IN pin of the boost converter U3, the first end of the inductor L2 and the first end of the capacitor C6 are electrically connected to the input terminal of the excitation voltage modulation circuit, the EN pin of the boost converter U3 is electrically connected to the enable terminal of the excitation voltage modulation circuit, the GND pin of the boost converter U3 is grounded, the FB pin of the boost converter U3 is electrically connected to the first end of the resistor R7, the SW pin of the boost converter U3 is electrically connected to the second end of the inductor L2 and the anode of the diode D2, the cathode of the diode D2, the first end of the resistor R13, the first end of the capacitor C7 and the first end of the resistor R12 are electrically connected to the output terminal of the excitation voltage modulation circuit, the second end of the resistor R13 is electrically connected to the second end of the resistor R7 and the first end of the resistor R16, the second end of the resistor R16 is electrically connected to the collector of the transistor Q6, the base of the transistor Q6 is electrically connected to the first end of the resistor R10 and the first end of the resistor R11, the second end of the resistor R10 is electrically connected to the modulation terminal of the excitation voltage modulation circuit, the second end of the resistor R11, the second end of the resistor R12, the second end of the capacitor C7 and the emitter of the transistor Q6 are grounded. The input terminal of the excitation voltage modulation circuit is electrically connected to the output terminal of the power supply circuit, the output terminal of the excitation voltage modulation circuit is electrically connected to the ultrasonic excitation signal transmitting circuit, and the enable terminal and the modulation terminal of the excitation voltage modulation circuit are respectively electrically connected to the main control circuit.

6. The ultrasonic flaw detection sensor of claim 1, wherein: The ultrasonic excitation signal transmitting circuit includes a capacitor C27, a capacitor C52, a resistor R36, a resistor R38, a resistor R39, a resistor R51, a resistor R52, a resistor R58, a resistor R59, a bidirectional diode D4, a bidirectional diode D5 and a MOSFET driver U4. The first end of the resistor R36 is electrically connected to the power supply terminal of the ultrasonic excitation signal transmitting circuit, the second end of the resistor R36 and the first end of the capacitor C27 are electrically connected to the VDD pin of the MOSFET driver U4, the IN pin of the MOSFET driver U4 is electrically connected to the first end of the resistor R38 and the first end of the resistor R39, the second end of the resistor R38 is electrically connected to the control terminal of the ultrasonic excitation signal transmitting circuit, the GND pin of the MOSFET driver U4, the second end of the capacitor C27 and the second end of the resistor R39 are grounded, the pin of the MOSFET driver U4 is electrically connected to the first end of the bidirectional diode D5, the second end of the bidirectional diode D5 is electrically connected to the first end of the capacitor C52 and the first end of the resistor R51, the second end of the capacitor C52 is electrically connected to the first end of the resistor R52 and the first end of the resistor R58, the second end of the resistor R58 and the second end of the bidirectional diode D4 are electrically connected to the first output terminal of the ultrasonic excitation signal transmitting circuit, the second end of the bidirectional diode D4 and the first end of the resistor R59 are electrically connected to the second output terminal of the ultrasonic excitation signal transmitting circuit, and the second end of the resistor R59, the second end of the resistor R51 and the second end of the resistor R52 are grounded. The power supply terminal of the ultrasonic excitation signal transmitting circuit is electrically connected to the output terminal of the excitation voltage modulation circuit, the control terminal of the ultrasonic excitation signal transmitting circuit is electrically connected to the main control circuit, and the first output terminal and the second output terminal of the ultrasonic excitation signal transmitting circuit are respectively electrically connected to the two ends of the ultrasonic transceiving sheet.

7. The ultrasonic flaw detection sensor of claim 1, wherein: The ultrasonic echo signal receiving circuit adopts a two-stage signal amplification circuit.

8. The ultrasonic flaw detection sensor of claim 7, wherein: The ultrasonic echo signal receiving circuit includes capacitors C9, C11, C16, C19, C20, C23, C28, C29, resistors R3, R4, R6, R17, R19, R20, R21, R22, R26, R28, a pressure resistor RV2, an operational amplifier U5A, and an operational amplifier U5B. The first end of the capacitor C16 and the first end of the capacitor C19 are electrically connected to the first input end and the second input end of the ultrasonic echo signal receiving circuit, respectively; the second end of the capacitor C16 is electrically connected to the first end of the resistor R22; the second end of the resistor R22 is electrically connected to the non-inverting input end of the operational amplifier U5B and the first end of the resistor R3; the second end of the resistor R3 is electrically connected to the first end of the resistor R19 and the first end of the resistor R20; the second end of the resistor R20 is electrically connected to the first end of the capacitor C9, the first end of the resistor R6, the power supply end of the operational amplifier U5B, and the power supply end of the operational amplifier U5A; the second end of the resistor R6 is electrically connected to the power supply end of the ultrasonic echo signal receiving circuit; the second end of the capacitor C9 and the second end of the resistor R19 are grounded; the second end of the resistor R26 is electrically connected to the inverting input end of the operational amplifier U5B, the first end of the resistor R4, and the first end of the capacitor C28; the output end of the operational amplifier U5B is electrically connected to the second end of the resistor R4, the second end of the capacitor C28, and the non-inverting input end of the operational amplifier U5A; the inverting input end of the operational amplifier U5A is electrically connected to the first end of the resistor R28, the first end of the resistor R17, and the first end of the capacitor C29; the second end of the resistor R28 is grounded through the capacitor C28; the output end of the operational amplifier U5A is electrically connected to the first end of the resistor R21, the second end of the resistor R17, and the second end of the capacitor C29; the grounding end of the operational amplifier U5A and the grounding end of the operational amplifier U5B are grounded; the second end of the resistor R21, the first end of the pressure resistor RV2, and the first end of the capacitor C23 are electrically connected to the output end of the ultrasonic echo signal receiving circuit; the second end of the pressure resistor RV2 and the second end of the capacitor C23 are grounded. The first input end and the second input end of the ultrasonic echo signal receiving circuit are electrically connected to the two ends of the ultrasonic transceiver sheet; the power supply end of the ultrasonic echo signal receiving circuit is electrically connected to the output end of the power supply circuit; and the output end of the ultrasonic echo signal receiving circuit is electrically connected to the main control circuit.

9. The ultrasonic flaw detection sensor of claim 1, wherein: The temperature detection circuit includes a resistor R15, a resistor R31, a pressure resistor RV4, and a capacitor C31. The first end of the resistor R31 is electrically connected to the output end of the temperature detection circuit; the second end of the resistor R31, the first end of the resistor R15, the first end of the pressure resistor RV4, and the first end of the capacitor C31 are electrically connected to the first input end of the temperature detection circuit; the second end of the resistor R15 is electrically connected to the power supply end of the temperature detection circuit; the second end of the capacitor C31 and the second end of the pressure resistor RV4 are electrically connected to the second input end of the temperature detection circuit and grounded. The power supply end of the temperature detection circuit is electrically connected with the output end of the power supply circuit, and the first input end and the second input end of the temperature detection circuit are respectively electrically connected with two ends of the temperature detection head.

10. The ultrasonic flaw detection sensor of claim 1, wherein: The input end of the excitation voltage modulation circuit, the power supply end of the ultrasonic echo signal receiving circuit and the power supply end of the temperature detection circuit are electrically connected with the output end of the power supply circuit through an electronic switch circuit; the input end of the electronic switch circuit is electrically connected with the output end of the power supply circuit, the output end of the electronic switch circuit is electrically connected with the input end of the excitation voltage modulation circuit, the power supply end of the ultrasonic echo signal receiving circuit and the power supply end of the temperature detection circuit, and the control end of the electronic switch circuit is electrically connected with the main control circuit.

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