CN213933694U - Ultrasonic transducer driving circuit for seamless line detection - Google Patents
Ultrasonic transducer driving circuit for seamless line detection Download PDFInfo
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- CN213933694U CN213933694U CN202022665262.3U CN202022665262U CN213933694U CN 213933694 U CN213933694 U CN 213933694U CN 202022665262 U CN202022665262 U CN 202022665262U CN 213933694 U CN213933694 U CN 213933694U
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Abstract
The application provides an ultrasonic transducer drive circuit for seamless line detection, including: the ultrasonic transducer comprises a signal providing module, a signal amplifying module, an N-MOS module, a power supply module, a pulse transformer, an LC tuning circuit module and an ultrasonic transducer module. The signal providing module is connected with the signal amplifying module; the signal amplification module is connected with the N-MOS module; the N-MOS module comprises a first N-MOS unit and a second N-MOS unit; the first N-MOS unit is connected with a tap at one end of a primary winding of the pulse transformer, and the second N-MOS unit is connected with a tap at the other end of the primary winding of the pulse transformer; the power supply module is connected with a middle tap of a primary winding of the pulse transformer and is grounded; the LC tuning circuit module is connected with taps at two ends of a secondary winding of the pulse transformer; the ultrasonic transducer module is connected with the LC tuning circuit module. The application provides a drive circuit can accurately detect the disconnected rail condition of rail.
Description
Technical Field
The application relates to the technical field of nondestructive testing, in particular to an ultrasonic transducer driving circuit for seamless line detection.
Background
The train is one of the common transportation means of people, and the guarantee of the safe operation of the train is vital. However, along with the higher and higher train running speed and the larger and larger train load, the degree of extrusion and impact on the steel rail is also larger and larger, and the probability of damage to the steel rail is also higher and higher, so that the detection of rail breakage in time is very necessary for ensuring the safety of railway train running.
In the prior art, generally, ultrasonic waves are generated by an ultrasonic transducer and are further used for detecting rail breakage, the rail is used as a propagation medium by the ultrasonic waves, and the condition of rail breakage can be effectively detected by ultrasonic wave transmission and reflected waveguide waveform signal analysis.
When the ultrasonic transducer is applied, it is the most important ring to ensure the driving circuit to operate normally. However, the inventor of the present application finds that the existing driving circuit has a complex structure and needs a higher direct current voltage for power supply, so that the emission efficiency is low, the driving capability is weak, the generated excitation waveform can generate shape distortion, the resonance effect cannot be achieved, the amplitude and the width of a signal at the receiving side are smaller, the judgment of the steel rail damage condition of the detection section is directly influenced, and the conditions of misinformation and missing report are caused. Namely, the accuracy rate of the prior art for detecting the rail breaking condition is lower.
SUMMERY OF THE UTILITY MODEL
The application provides an ultrasonic transducer drive circuit for seamless track detects to solve the lower problem of rate of accuracy that prior art detected the rail condition of breaking.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
the application provides an ultrasonic transducer drive circuit for seamless line detection, including: the device comprises a signal providing module, a signal amplifying module, an N-MOS module, a power supply module, a pulse transformer, an LC tuning circuit module and an ultrasonic transducer module;
the signal providing module is connected with the signal amplifying module and used for providing pulse signals and sending the pulse signals to the signal amplifying module;
the signal amplification module is connected with the N-MOS module and used for performing power amplification processing on pulse signals and sending the pulse signals to the N-MOS module;
the N-MOS module comprises a first N-MOS unit and a second N-MOS unit; the first N-MOS unit is connected with a tap at one end of a primary winding of the pulse transformer, and the first N-MOS unit is grounded; the second N-MOS unit is connected with a tap at the other end of the primary winding of the pulse transformer, and the second N-MOS unit is grounded;
the power supply module is connected with a middle tap of a primary winding of the pulse transformer and is grounded;
the LC tuning circuit module is connected with taps at two ends of a secondary winding of the pulse transformer;
the ultrasonic transducer module is connected with the LC tuning circuit module.
Optionally, the signal providing module is an STM32 processor.
Optionally, the signal amplification module adopts an N-MOS drive circuit.
Optionally, the first N-MOS unit includes: the protection circuit comprises a first N-MOS transistor Q1, a first resistor R1 and a first protection diode D1;
the grid electrode of the first N-MOS tube Q1 is connected with the signal amplification module, and the source electrode is grounded;
one end of the first resistor R1 is connected with the drain electrode of the first N-MOS tube Q1, and the other end of the first resistor R1 is connected with a tap at one end of a primary winding of the pulse transformer;
the positive electrode of the first protection diode D1 is connected with the source electrode of the first N-MOS tube Q1, and the negative electrode of the first protection diode D1 is connected with a tap at one end part of a primary winding of the pulse transformer.
Optionally, the second N-MOS unit includes: the second N-MOS transistor Q2, the second resistor R2 and the second protection diode D2;
the grid electrode of the second N-MOS tube Q2 is connected with the signal amplification module, and the source electrode is grounded;
one end of the second resistor R2 is connected with the drain electrode of the second N-MOS tube Q2, and the other end of the second resistor R2 is connected with a tap at the other end of the primary winding of the pulse transformer;
the anode of the second protection diode D2 is connected to the source of the second N-MOS transistor Q2, and the cathode is connected to a tap at the other end of the primary winding of the pulse transformer.
Optionally, the power supply module includes: a direct current power supply H-VCC and a first capacitor C1;
the direct current power supply H-VCC is connected with the anode of the first capacitor C1, and the direct current power supply H-VCC is connected with the middle tap of the primary winding of the pulse transformer;
the negative pole of the first capacitor C1 is grounded.
Optionally, the LC tuning circuit module includes: a first inductor L1, a third resistor R3 and a second capacitor C2;
one end of the first inductor L1 is connected with a tap at one end of the secondary winding of the pulse transformer, and the other end of the first inductor L1 is connected with one end of the third resistor R3;
the other end of the third resistor R3 is connected with a tap at the other end of the secondary winding of the pulse transformer;
one end of the second capacitor C2 is connected to the first inductor L1, and the other end is connected to the other end of the third resistor R3.
Optionally, the ultrasonic transducer module includes: a second inductor L2 and an ultrasonic transducer;
one end of the second inductor L2 is connected with the other end of the second capacitor C2, and the other end of the second inductor L2 is connected with one end of the ultrasonic transducer;
the other end of the ultrasonic transducer is connected with one end of the second capacitor C2.
Compared with the prior art, the beneficial effect of this application is:
the application provides an ultrasonic transducer drive circuit for seamless line detection, including: the device comprises a signal providing module, a signal amplifying module, an N-MOS module, a power supply module, a pulse transformer, an LC tuning circuit module and an ultrasonic transducer module; the signal providing module is connected with the signal amplifying module; the signal amplification module is connected with the N-MOS module; the N-MOS module comprises a first N-MOS unit and a second N-MOS unit; the first N-MOS unit is connected with a tap at one end of a primary winding of the pulse transformer, and the second N-MOS unit is connected with a tap at the other end of the primary winding of the pulse transformer; the power supply module is connected with a middle tap of a primary winding of the pulse transformer and is grounded; the LC tuning circuit module is connected with taps at two ends of a secondary winding of the pulse transformer; the ultrasonic transducer module is connected with the LC tuning circuit module. The driving circuit provided by the application is simple in structure and strong in driving capability, extraction and identification of signals at a receiving end are facilitated, and anti-interference performance and engineering construction applicability are improved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is an overall structural diagram of an ultrasonic transducer driving circuit for seamless line detection according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of pulse signals PWM1 and PWM2 in an ultrasonic transducer driving circuit for seamless line detection provided by an embodiment of the present application;
fig. 3 is a schematic diagram of a high-voltage pulse signal generated after being processed by an LC tuning circuit in an ultrasonic transducer driving circuit for seamless line detection according to an embodiment of the present disclosure;
wherein: 1 is an STM32 processor; 2 is an N-MOS drive circuit; 3 is a capacitor C1; 4 is a direct current power supply H-VCC; 5 is an N-MOS power tube Q1; 6 is a power ground; 7 is a resistor R1; 8 is a protection diode D1; 9 is an N-MOS power tube Q2; 10 is a resistor R2; 11 is a protection diode D2; 12 is a pulse transformer T1; 13 is a resistor R3; 14 is inductance L1; 15 is a capacitor C2; 16 is inductance L2; 17 is an ultrasonic transducer X1; 18 is a pulse signal PWM 1; 19 is a pulse signal PWM 3; 20 is a pulse signal PWM 2; reference numeral 21 denotes a pulse signal PWM 4.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a general structure diagram of an ultrasonic transducer driving circuit for seamless line detection according to an embodiment of the present application is provided. The drive circuit includes: the ultrasonic transducer comprises a signal providing module, a signal amplifying module, an N-MOS module, a power supply module, a pulse transformer, an LC tuning circuit module and an ultrasonic transducer module.
The signal providing module is connected with the signal amplifying module and used for providing pulse signals and sending the pulse signals to the signal amplifying module.
The signal amplification module is connected with the N-MOS module and used for performing power amplification processing on the pulse signals and sending the pulse signals to the N-MOS module.
The N-MOS module includes a first N-MOS cell and a second N-MOS cell. The first N-MOS unit is connected with a tap at one end of a primary winding of the pulse transformer, and the first N-MOS unit is grounded; the second N-MOS unit is connected with a tap at the other end of the primary winding of the pulse transformer, and the second N-MOS unit is grounded.
The power supply module is connected with a middle tap of a primary winding of the pulse transformer, and the power supply module is grounded.
And the LC tuning circuit module is connected with taps at two ends of a secondary winding of the pulse transformer.
The ultrasonic transducer module is connected with the LC tuned circuit module and used for manufacturing ultrasonic waves.
In some embodiments, the signal providing module is an STM32 processor.
Specifically, the STM32 processor may provide a pair of pulse signals PWM1 and PWM2 having complementary outputs of a particular frequency and transmit the pulse signals PWM1 and PWM2 to the signal amplification module. As shown in fig. 2, the pulse signals PWM1 and PWM2 are schematic diagrams.
In some embodiments, the signal amplification module employs an N-MOS drive circuit. The pulse signals PWM1 and PWM2 are subjected to power amplification through an N-MOS driving circuit to generate pulse signals PWM3 and PWM 4. The pulse signal PWM3 is transmitted to the first N-MOS unit, and the pulse signal PWM4 is transmitted to the second N-MOS unit.
In some embodiments, the first N-MOS cell comprises: the circuit comprises a first N-MOS transistor Q1, a first resistor R1 and a first protection diode D1.
The grid electrode of the first N-MOS transistor Q1 is connected with the signal amplification module, and the source electrode of the Q1 is grounded. One end of the first resistor R1 is connected with the drain of the first N-MOS transistor Q1, and the other end of the resistor R1 is connected with a tap at one end of the primary winding of the pulse transformer T1. The anode of the first protection diode D1 is connected to the source of the first N-MOS transistor Q1, and the cathode of D1 is connected to a tap at one end of the primary winding of the pulse transformer T1.
In some embodiments, the second N-MOS cell comprises: a second N-MOS transistor Q2, a second resistor R2, and a second protection diode D2.
The gate of the second N-MOS transistor Q2 is connected to the signal amplification module, and the source of the Q2 is grounded. One end of a second resistor R2 is connected with the drain electrode of the second N-MOS tube Q2, and the other end of R2 is connected with a tap of the other end of the primary winding of the pulse transformer T1. The anode of the second protection diode D2 is connected to the source of the second N-MOS transistor Q2, and the cathode of D2 is connected to the tap on the other end of the primary winding of the pulse transformer T1.
In some embodiments, the power supply module comprises: a direct current power supply H-VCC and a first capacitor C1.
The direct-current power supply H-VCC is connected with the anode of the first capacitor C1, and the direct-current power supply H-VCC is connected with the middle tap of the primary winding of the pulse transformer T1. The cathode of the first capacitor C1 is connected to ground.
In some embodiments, the LC tuning circuit module comprises: a first inductor L1, a third resistor R3 and a second capacitor C2.
One end of the first inductor L1 is connected to a tap at one end of the secondary winding of the pulse transformer T1, and the other end of L1 is connected to one end of the third resistor R3. The other end of the third resistor R3 is connected to a tap at the other end of the secondary winding of the pulse transformer T1. One end of the second capacitor C2 is connected to the first inductor L1, and the other end of C2 is connected to the other end of the third resistor R3.
In some embodiments, the ultrasonic transducer module comprises: a second inductor L2 and an ultrasonic transducer X1.
One end of the second inductor L2 is connected to the other end of the second capacitor C2, and the other end of L2 is connected to one end of the ultrasonic transducer. The other end of the ultrasonic transducer is connected to one end of a second capacitor C2.
Specifically, in the embodiment of the present application, a tap on the secondary side of the pulse transformer T1 is sequentially connected to one end of the resistor R3, one end of the capacitor C2, and one end of the inductor L2; the lower tap of the secondary side of the pulse transformer T1 is connected with one end of an inductor L1, a capacitor C2 and an ultrasonic transducer X1 in sequence.
The application provides a drive circuit simple structure, reliable operation, the driving force is strong. After the direct-current power supply H-VCC is used for being subjected to boost conversion through the pulse transformer, the ultrasonic transducer is subjected to impedance matching through the processing of the LC resonance circuit and the matching circuit, and finally enough driving capacity is generated to drive the ultrasonic transducer to form an ultrasonic guided wave signal in a steel rail, so that the extraction and identification of a receiving end signal are facilitated, and the anti-interference performance and the engineering construction applicability are improved.
Meanwhile, the propagation distance of an excitation waveform after the push-pull driving circuit is used is obviously superior to that of a traditional driving circuit, and the failure rate of the easily damaged MOS tube in the driving circuit is obviously reduced.
The working principle of the driving circuit provided by the application is as follows:
the STM32 processor provides a pair of complementary output pulse signals PWM1 and PWM2 having a particular frequency. The pulse signals PWM1 and PWM2 are subjected to power amplification through an N-MOS driving circuit to generate pulse signals PWM3 and PWM4, the PWM3 is connected with the grid electrode of the N-MOS transistor Q1, and the PWM4 is connected with the grid electrode of the N-MOS transistor Q2 in a signal mode, so that the on and off of the N-MOS transistor Q1 and the N-MOS transistor Q2 are controlled.
And the H-VCC supplies energy to the N-MOS tube for the direct current power supply. When the N-MOS transistor Q1 is turned on and the N-MOS transistor Q2 is turned off, a current flows through the N-MOS transistor Q1 through the primary side N1 coil of the pulse transformer T1 and the current-limiting resistor R1 to form a secondary coil which is energy-coupled to the pulse transformer T1, wherein the D1 is used as a voltage clamp for protecting the Q1 from transient high voltage damage. When the N-MOS transistor Q2 is turned on and the N-MOS transistor Q1 is turned off, a current flows through the primary side N2 coil of the pulse transformer T1 and the current-limiting resistor R2 through the N-MOS transistor Q2 to form energy coupled to the secondary side coil of the pulse transformer T1 to generate a reverse current, wherein the D2 is used as a voltage clamp for protecting the Q2 from being damaged by a transient high voltage.
The secondary coil of the pulse transformer generates a high-voltage square wave pulse, and the high-voltage pulse generates a high-voltage pulse signal through an LC tuning circuit composed of an inductor L1, a resistor R3 and a capacitor C2, as shown in FIG. 3. And pure impedance matching is carried out after capacitive reactance is eliminated through the L2 inductor and the ultrasonic transducer, so that the ultrasonic transducer is efficiently excited to generate a good ultrasonic signal to act on the steel rail, and stable and reliable detection and identification of receiving end equipment are facilitated.
It should be noted that the circuit configurations shown in the above embodiments are only some implementations of the present application, and the present application does not limit the specific circuit configurations of the respective modules or units.
The application provides an ultrasonic transducer drive circuit for seamless line detection, including: the device comprises a signal providing module, a signal amplifying module, an N-MOS module, a power supply module, a pulse transformer, an LC tuning circuit module and an ultrasonic transducer module; the signal providing module is connected with the signal amplifying module; the signal amplification module is connected with the N-MOS module; the N-MOS module comprises a first N-MOS unit and a second N-MOS unit; the first N-MOS unit is connected with a tap at one end of a primary winding of the pulse transformer, and the second N-MOS unit is connected with a tap at the other end of the primary winding of the pulse transformer; the power supply module is connected with a middle tap of a primary winding of the pulse transformer and is grounded; the LC tuning circuit module is connected with taps at two ends of a secondary winding of the pulse transformer; the ultrasonic transducer module is connected with the LC tuning circuit module. The driving circuit provided by the application is simple in structure and strong in driving capability, extraction and identification of signals at a receiving end are facilitated, and anti-interference performance and engineering construction applicability are improved.
Since the above embodiments are all described by referring to and combining with other embodiments, the same portions are provided between different embodiments, and the same and similar portions between the various embodiments in this specification may be referred to each other. And will not be described in detail herein.
It is noted that, in this specification, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus. The term "comprising" a defined element does not, without further limitation, exclude the presence of other like elements in a circuit structure, article, or device that comprises the element.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims. The above-described embodiments of the present application do not limit the scope of the present application.
Claims (8)
1. An ultrasonic transducer driving circuit for seamless line detection, comprising:
the device comprises a signal providing module, a signal amplifying module, an N-MOS module, a power supply module, a pulse transformer, an LC tuning circuit module and an ultrasonic transducer module;
the signal providing module is connected with the signal amplifying module and used for providing pulse signals and sending the pulse signals to the signal amplifying module;
the signal amplification module is connected with the N-MOS module and used for performing power amplification processing on pulse signals and sending the pulse signals to the N-MOS module;
the N-MOS module comprises a first N-MOS unit and a second N-MOS unit; the first N-MOS unit is connected with a tap at one end of a primary winding of the pulse transformer, and the first N-MOS unit is grounded; the second N-MOS unit is connected with a tap at the other end of the primary winding of the pulse transformer, and the second N-MOS unit is grounded;
the power supply module is connected with a middle tap of a primary winding of the pulse transformer and is grounded;
the LC tuning circuit module is connected with taps at two ends of a secondary winding of the pulse transformer;
the ultrasonic transducer module is connected with the LC tuning circuit module.
2. The ultrasonic transducer driving circuit for seamless line detection according to claim 1, wherein the signal providing module is an STM32 processor.
3. The ultrasonic transducer driving circuit for seamless line detection as claimed in claim 1, wherein the signal amplification module employs an N-MOS driving circuit.
4. The ultrasonic transducer driving circuit for seamless line detection according to claim 1, wherein the first N-MOS unit comprises: the protection circuit comprises a first N-MOS transistor Q1, a first resistor R1 and a first protection diode D1;
the grid electrode of the first N-MOS tube Q1 is connected with the signal amplification module, and the source electrode is grounded;
one end of the first resistor R1 is connected with the drain electrode of the first N-MOS tube Q1, and the other end of the first resistor R1 is connected with a tap at one end of a primary winding of the pulse transformer;
the positive electrode of the first protection diode D1 is connected with the source electrode of the first N-MOS tube Q1, and the negative electrode of the first protection diode D1 is connected with a tap at one end part of a primary winding of the pulse transformer.
5. The ultrasonic transducer driving circuit for seamless line detection according to claim 1, wherein the second N-MOS unit comprises: the second N-MOS transistor Q2, the second resistor R2 and the second protection diode D2;
the grid electrode of the second N-MOS tube Q2 is connected with the signal amplification module, and the source electrode is grounded;
one end of the second resistor R2 is connected with the drain electrode of the second N-MOS tube Q2, and the other end of the second resistor R2 is connected with a tap at the other end of the primary winding of the pulse transformer;
the anode of the second protection diode D2 is connected to the source of the second N-MOS transistor Q2, and the cathode is connected to a tap at the other end of the primary winding of the pulse transformer.
6. The ultrasonic transducer driving circuit for seamless line detection as claimed in claim 1, wherein the power supply module comprises: a direct current power supply H-VCC and a first capacitor C1;
the direct current power supply H-VCC is connected with the anode of the first capacitor C1, and the direct current power supply H-VCC is connected with the middle tap of the primary winding of the pulse transformer;
the negative pole of the first capacitor C1 is grounded.
7. The ultrasonic transducer driving circuit for seamless line detection of claim 1, wherein the LC tuning circuit module comprises: a first inductor L1, a third resistor R3 and a second capacitor C2;
one end of the first inductor L1 is connected with a tap at one end of the secondary winding of the pulse transformer, and the other end of the first inductor L1 is connected with one end of the third resistor R3;
the other end of the third resistor R3 is connected with a tap at the other end of the secondary winding of the pulse transformer;
one end of the second capacitor C2 is connected to the first inductor L1, and the other end is connected to the other end of the third resistor R3.
8. The ultrasonic transducer driving circuit for seamless line detection as claimed in claim 7, wherein the ultrasonic transducer module comprises: a second inductor L2 and an ultrasonic transducer;
one end of the second inductor L2 is connected with the other end of the second capacitor C2, and the other end of the second inductor L2 is connected with one end of the ultrasonic transducer;
the other end of the ultrasonic transducer is connected with one end of the second capacitor C2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022665262.3U CN213933694U (en) | 2020-11-18 | 2020-11-18 | Ultrasonic transducer driving circuit for seamless line detection |
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| CN202022665262.3U CN213933694U (en) | 2020-11-18 | 2020-11-18 | Ultrasonic transducer driving circuit for seamless line detection |
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Denomination of utility model: A driving circuit for ultrasonic transducer used in seamless line detection Granted publication date: 20210810 Pledgee: Bank of China Limited Baoding Branch Pledgor: BAODING GALAXY ELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2024980028630 |
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