CN108333633A - A kind of control circuit of electromagnetics transmitter - Google Patents
A kind of control circuit of electromagnetics transmitter Download PDFInfo
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- CN108333633A CN108333633A CN201711429604.8A CN201711429604A CN108333633A CN 108333633 A CN108333633 A CN 108333633A CN 201711429604 A CN201711429604 A CN 201711429604A CN 108333633 A CN108333633 A CN 108333633A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/083—Controlled source electromagnetic [CSEM] surveying
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0421—Multiprocessor system
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/083—Controlled source electromagnetic [CSEM] surveying
- G01V2003/084—Sources
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21137—Analog to digital conversion, ADC, DAC
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/22—Pc multi processor system
- G05B2219/2214—Multicontrollers, multimicrocomputers, multiprocessing
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Automation & Control Theory (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Electronic Switches (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of control circuits of electromagnetics transmitter, belong to electromagnetic technology field.Whether meet setting condition including fault detection circuit detection inversion bridge circuit, setting condition includes at least one of the following conditions：Voltage in inversion bridge circuit between the input terminal and output end of at least one device for power switching is more than the maximum working voltage of device for power switching；The voltage of the input signal of inversion bridge circuit is more than voltage threshold；The electric current of the output signal of inversion bridge circuit is more than current threshold；It is the inversion signal of first frequency signal that signal generating circuit, which provides first frequency signal and second frequency signal, second frequency signal,；Logic gates generates failure control signal according to the testing result of fault detection circuit；According to failure control signal, first frequency signal and second frequency signal, control inversion bridge circuit works when being unsatisfactory for setting condition, does not work when meeting setting condition.The present invention can solve the problems, such as accurately carry out geophysical exploration.
Description
Technical field
The present invention relates to electromagnetic technology field, more particularly to a kind of control circuit of electromagnetics transmitter.
Background technology
Electromagnetic surveying technology is naturally encouraged with artificial (controllable) field source in the earth according to electromagnetic induction principle research
Alternating electromagnetism field distribution, and the magnetic distribution Study of The Underground by observing is electrically and a kind of geophysics of geologic feature is surveyed
Spy method.Electromagnetic surveying technology is at home and abroad rapidly developed in recent years, and soluble problem scope constantly expands, several
The every field for relating to geophysical exploration, achieves good effect, have become at present it is indispensable, receive people
One of the geophysical exploration method attracted attention.
Electromagnetic surveying technology is realized using electromagnetic survey system.Electromagnetic survey system includes emission system and reception system.
Wherein, emission system includes electromagnetics transmitter, transmitting antenna, power supply and external equipment, and reception system includes that electromagnetism receives
Machine and reception antenna.External equipment provides pumping signal to electromagnetics transmitter, and electromagnetics transmitter is right under the driving of power supply
Pumping signal carries out power amplification, and the signal after power amplification is launched by transmitting antenna；Reception antenna receives
Electro-magnetic receiver is transferred to after signal to be handled.The signal emitted at this time and the signal received are all known, are passed through
The difference of comparison between the two, you can determine situation of change of the signal in transmission process, and then carry out geophysical exploration.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems：
When breaking down inside the emission system, be likely to result in actual transmission signal and pumping signal in frequency and
At least one of duty ratio is upper inconsistent, and using the frequency of pumping signal when being compared with the signal received
And duty ratio, in this case, the difference that the signal of transmitting and the signal contrast received obtain can not really reflect letter
Situation of change number in transmission process, can not accurately carry out geophysical exploration.
Invention content
In order to solve the problems, such as that the prior art can not accurately carry out geophysical exploration, an embodiment of the present invention provides one
The control circuit of kind electromagnetics transmitter.The technical solution is as follows：
An embodiment of the present invention provides a kind of control circuit of electromagnetics transmitter, the electromagnetics transmitter includes transmitting day
Line and the inversion bridge circuit being connect with the transmitting antenna, the inversion bridge circuit include the first device for power switching, the second work(
Rate switching device, third device for power switching and the 4th device for power switching, the output end of first device for power switching with
The input terminal of the third device for power switching connects, the output end of second device for power switching and the 4th power
The input terminal of switching device connects, the input terminal of first device for power switching and second device for power switching it is defeated
Enter end connection and is connect with the anode of power supply, the output end of the third device for power switching and the 4th power switch device
The output end of part is connected and is connect with the cathode of the power supply；
The control circuit includes：
Fault detection circuit, for detecting whether the inversion bridge circuit meets setting condition, the setting condition includes
At least one of the following conditions：First device for power switching, second device for power switching, the third power
Voltage in switching device, the 4th device for power switching between at least one input terminal and output end is opened more than power
Close the maximum working voltage of device；The voltage of the input signal of the inversion bridge circuit is more than voltage threshold；The inverter bridge electricity
The electric current of the output signal on road is more than current threshold；
Signal generating circuit, for providing first frequency signal and second frequency signal, the second frequency signal is institute
State the inversion signal of first frequency signal；
Logic gates, respectively with first device for power switching, second device for power switching, the third
Device for power switching is connected with the control terminal of the 4th device for power switching, for the inspection according to the fault detection circuit
It surveys result and generates failure control signal；Believed according to the failure control signal, the first frequency signal and the second frequency
Number, it controls the inversion bridge circuit and works when being unsatisfactory for the setting condition, do not work when meeting the setting condition.
Specifically, the logic gates include first with door, second with door, third and door and the 4th and door；Described
One with door, described second with door, the third and door, the described 4th first input end with door and the fault detection circuit
Connection, described first with door, described second with door, the third and door, the described 4th the second input terminal with door and the letter
The connection of number generation circuit, described first connect with the output end of door with the control terminal of first device for power switching, and described the
Two connect with the output end of door with the control terminal of second device for power switching, the output end of the third and door with it is described
The control terminal of third device for power switching connects, the described 4th with the control of the output end and the 4th device for power switching of door
End connection processed.
Optionally, the fault detection circuit includes：
Device for power switching detection circuit, for detecting first device for power switching respectively, second power is opened
Close device, the third device for power switching, the 4th device for power switching input terminal and output end between voltage be
The no maximum working voltage more than device for power switching, and fault feedback signal is exported according to testing result；
Circuit for checking input signals, for detecting whether the voltage of input signal of the inversion bridge circuit is more than voltage
Threshold value, and output overvoltage feedback signal according to testing result；
Output signal detection circuit, for detecting whether the electric current of output signal of the inversion bridge circuit is more than electric current
Threshold value, and output overcurrent feedback signal according to testing result；
The logic gates is used for, anti-according to the fault feedback signal, the overcurrent feedback signal and the overvoltage
Feedback signal generates the failure control signal.
Preferably, the control circuit further includes：
Reset switch generates reset signal for receiving reset instruction input by user, and according to the reset instruction；
The logic gates is additionally operable to, anti-to the fault feedback signal, the overcurrent according to the reset signal
Feedback signal and the over-pressed feedback signal are resetted.
Specifically, the logic gates further includes the 5th and door, the 6th and door, the 7th and door, the 8th and door, first
Or door, second or door and third or door；Described 5th first input end and device for power switching detection circuit company with door
Connect, the described 5th connect with the second input terminal of door with the output end of described first or door, the described 5th with the output end of door with
Described first or door first input end connection, described first or the second input terminal of door connect with the reset switch, it is described
First or the output end of door connect with the first input end of door with the described 8th；Described 6th first input end and institute with door
Circuit for checking input signals connection is stated, the described 6th connect with the second input terminal of door with the output end of described second or door, institute
The 6th is stated to connect with the output end of door with the first input end of described second or door, described second or door the second input terminal with
Reset switch connection, described second or the output end of door connect with the described 8th with the second input terminal of door；Described
Seven connect with the first input end of door with the output signal detection circuit, the described 7th with the second input terminal of door with it is described
The output end of third or door connects, and the described 7th connect with the output end of door with the first input end of the third or door, described
Second input terminal of third or door is connect with the reset switch, the output end of the third or door and the described 8th and door
Third input terminal connects；Described 8th with the output end of door respectively with described first with door, described second with door, the third
It is connect with the first input end of door with door, the described 4th.
Preferably, the control circuit further includes：
Starting switch generates enabling signal for receiving enabled instruction input by user, and according to the enabled instruction；
The logic gates is additionally operable to, and is generated according to the enabling signal and the reset signal and is started control signal；
Signal, the failure control signal, the first frequency signal and the second frequency signal, control are controlled according to the startup
The inversion bridge circuit is made to work after receiving the reset instruction and the enabled instruction.
Specifically, the logic gates further includes the 4th or door and the 9th and door, the described 4th or door the first input
End is connect with the reset switch, the described 4th or the second input terminal of door connect with the output end of the described 4th or door, it is described
4th or the output end of door connect with the described 9th with the first input end of door, the described 9th the second input terminal and institute with door
State starting switch connection, the described 9th with the output end of door respectively with described first with door, described second with door, the third
It is connect with the third input terminal of door with door, the described 4th.
Optionally, the signal generating circuit includes：
Oscillator, for generating third frequency signal；
Frequency divider obtains the first frequency signal for being divided to the third frequency signal；
The logic gates is additionally operable to, and reverse phase is carried out to the first frequency signal, obtains the second frequency letter
Number.
Preferably, the control circuit further includes：
Signal parameter acquiring unit, for obtaining signal parameter input by user or pre-stored signal parameter, institute
State frequency dividing ratio of the signal parameter for the frequency divider to be arranged.
Optionally, the control circuit further includes：
Alarm, for alarming to user when the inversion bridge circuit meets the setting condition.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
Detect whether inversion bridge circuit breaks down by fault detection circuit, logic gates is produced according to testing result
Raw failure control signal, at the same it is normal using each device for power switching in signal generating circuit offer control inversion bridge circuit
The first frequency signal and second frequency signal of work, logic gates further according to failure control signal, first frequency signal and
Second frequency signal controls inversion bridge circuit and is not working normally in the event of failure, is stopped when breaking down, on the one hand may be used
Abnormal signal is sent to reception system to avoid when inversion bridge circuit breaks down, on the other hand may insure again inverse
Becoming bridge circuit in the event of failure can not be sent to normal signal reception system, to improve the accurate of geophysical exploration
Property.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, required in being described below to embodiment
The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the structural schematic diagram of electromagnetics transmitter provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of inversion bridge circuit provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of control circuit provided in an embodiment of the present invention；
Fig. 4 is the circuit diagram of failure control signal part provided in an embodiment of the present invention；
Fig. 5 is the circuit diagram provided in an embodiment of the present invention for starting control signal section；
Fig. 6 is the schematic diagram of signal generating circuit provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of signal parameter part provided in an embodiment of the present invention；
Fig. 8 is the hardware structure diagram of control circuit provided in an embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is first combined simply to introduce the electromagnetics transmitter of control circuit application provided in an embodiment of the present invention below.
Fig. 1 is the structural schematic diagram of electromagnetics transmitter, and referring to Fig. 1, electromagnetics transmitter includes rectified three-phase circuit 1, filter circuit 2, the
One inversion bridge circuit 3, high frequency transformer 4, high-frequency rectification circuit 5, the second inversion bridge circuit 6.
Wherein, rectified three-phase circuit 1 is used to three-phase alternating current being converted to Rectified alternating current, such as the pulsating direct current of 500V
Electricity；Filter circuit 2 from Rectified alternating current for filtering out constant voltage DC electricity, such as the constant voltage DC electricity of 500V；First inverter bridge electricity
Road 3 is used to constant voltage DC electricity being converted to alternating current, and if maximum amplitude is 500V, frequency is the ac square wave of 20kHZ；High frequency
Transformer 4 is for changing the amplitude of transformed alternating current, and if maximum amplitude is 1000V, frequency is the ac square wave of 20kHZ；
High-frequency rectification circuit 5 be used for amplitude is changed after alternating current be converted to direct current, as direct current amplitude 0~1000V it
Between；Second inversion bridge circuit 6 is used to transformed direct current being converted to alternating current and export to transmitting antenna, such as alternating current
Maximum amplitude between 0~1000V.
Specific implementation when, the input terminal of rectified three-phase circuit 1 is electrically connected with three-phase alternating current, rectified three-phase circuit 1 it is defeated
Outlet is connect with the input terminal of filter circuit 2, and the output end of filter circuit 2 is connect with the input terminal of the first inversion bridge circuit 3,
The output end of first inversion bridge circuit 3 is connect with the input terminal of high frequency transformer 4, and the output end and high frequency of high frequency transformer 4 are whole
The input terminal of current circuit 5 connects, and the output end of high-frequency rectification circuit 5 is connect with the input terminal of the second inversion bridge circuit 6, and second
The output end of inversion bridge circuit 6 is connect with transmitting antenna.
An embodiment of the present invention provides a kind of control circuits of electromagnetics transmitter, are suitable for control and are connect with transmitting antenna
Inversion bridge circuit, such as the second inversion bridge circuit in Fig. 1.Fig. 2 is showing for inversion bridge circuit provided in an embodiment of the present invention
It is intended to, referring to Fig. 2, which includes the first device for power switching T1, the second device for power switching T2, third power
Switching element T 3 and the 4th device for power switching T4.
Wherein, the output end of the first device for power switching T1 is connect with the input terminal of third device for power switching T3, and second
The output end of device for power switching T2 is connect with the input terminal of the 4th device for power switching T4, the first device for power switching T1's
The input terminal of input terminal and the second device for power switching T2 are connected and are connect with the anode of power supply U, third device for power switching T3
Output end and the 4th device for power switching T4 output end connect and connect with the cathode of power supply U.
Specifically, the first device for power switching T1, the second device for power switching T2, third device for power switching T3 and
Four device for power switching T4 can be insulated gate bipolar transistor (English：Insulated Gate Bipolar
Transistor, referred to as：IGBT).
Optionally, which can also include the first diode D1, the second diode D2, third diode D3
With the 4th diode D4.Wherein, the cathode of the first diode D1 is connect with the input terminal of the first device for power switching T1, and first
The anode of diode D1 is connect with the output end of the first device for power switching T1；The cathode and the second power of second diode D2
The input terminal of switching element T 2 connects, and the anode of the second diode D2 is connect with the output end of the second device for power switching T2；The
The cathode of three diode D3 is connect with the input terminal of third device for power switching T3, anode and the third work(of third diode D3
The output end of rate switching element T 3 connects；The cathode of 4th diode D4 is connect with the input terminal of the 4th device for power switching T4,
The anode of 4th diode D4 is connect with the output end of the 4th device for power switching T4.
Fig. 3 is the schematic diagram of control circuit provided in an embodiment of the present invention, and referring to Fig. 3, which includes failure inspection
Slowdown monitoring circuit 10, signal generating circuit 20 and logic gates 30.
Fault detection circuit 10, for detecting whether inversion bridge circuit meets setting condition, setting condition includes following item
At least one of part：First device for power switching, the second device for power switching, third device for power switching, the 4th power are opened
Close the maximum working voltage that the voltage between input terminal and output end at least one in device is more than device for power switching；It is inverse
The voltage for becoming the input signal of bridge circuit is more than voltage threshold；The electric current of the output signal of inversion bridge circuit is more than current threshold；
Signal generating circuit 20, for providing first frequency signal and second frequency signal, second frequency signal is first
(i.e. the frequency of first frequency signal is identical with the frequency of second frequency signal, and first frequency is believed for the inversion signal of frequency signal
Number phase and the phase of second frequency signal between phase difference of pi)；
Logic gates 30 is opened with the first device for power switching T1, the second device for power switching T2, third power respectively
The control terminal connection for closing device T3 and the 4th device for power switching T4, for being generated according to the testing result of fault detection circuit
Failure control signal；According to failure control signal, first frequency signal and second frequency signal, control inversion bridge circuit is not
It works when meeting setting condition, does not work when meeting setting condition.
The embodiment of the present invention detects whether inversion bridge circuit breaks down by fault detection circuit, logic gates root
Failure control signal is generated according to testing result, while each power in control inversion bridge circuit is provided using signal generating circuit
The first frequency signal and second frequency signal of switching device normal work, logic gates is further according to failure control signal, the
One frequency signal and second frequency signal control inversion bridge circuit are not working normally in the event of failure, stop when breaking down
On the one hand abnormal signal can be sent to reception system, on the other hand again by work to avoid when inversion bridge circuit breaks down
It may insure that normal signal can be sent to reception system when inversion bridge circuit does not have failure, to improve earth object
Manage the accuracy of detection.
In specific implementation, the first device for power switching T1, the second device for power switching T2, third device for power switching
T3 and the 4th device for power switching T4 can be connected when control terminal is high level, and end when control terminal is low level,
It can be connected when control terminal is low level, and end when control terminal is high level.
The present embodiment with the first device for power switching T1, the second device for power switching T2, third device for power switching T3 and
4th device for power switching T4 is connected when control terminal is high level, and when control terminal is low level for cut-off, such as Fig. 3
Shown, logic gates 30 may include first and door A1, second and door A2, third and door A3 and the 4th and door A4.First with
Door A1, second and door A2, third and door A3 and the 4th are connect with the first input end of door A4 with fault detection circuit 10, and first
It is connect with signal generating circuit 20 with the second input terminal of door A4 with door A1, second and door A2, third and door A3 and the 4th, the
One connect with the output end of door A1 with the control terminal of the first device for power switching T1, the output end and the second work(of second and door A2
The control terminal of rate switching element T 2 connects, and third is connect with the output end of door A3 with the control terminal of third device for power switching T3,
4th connect with the output end of door A4 with the control terminal of the 4th device for power switching T4.
Specifically, the second input terminal of the input of signal generating circuit 20 first and door A1 and the 4th and door A4 is first
Frequency signal, input second and door A2 and third and the second input terminal of door A3 are second frequency signals.
In practical applications, first and door A1 and the 4th and door A4 can be same and door, second with door A2 and third
Can be same and door with door A3.
In above-mentioned realization method, failure control signal is high level when inversion bridge circuit is unsatisfactory for imposing a condition,
It is low level that inversion bridge circuit, which meets when imposing a condition,.In this way when inversion bridge circuit is unsatisfactory for imposing a condition, the event of high level
After hindering control signal and first frequency signal (or second frequency signal) input and door progress and operation, output signal
Unanimously with first frequency signal (or second frequency signal), this signal is output to power switch in inversion bridge circuit to waveform
The control terminal of device, device for power switching according to the frequency of first frequency signal (or second frequency signal) carry out conducting and
Cut-off carries out power amplification to first frequency signal (or second frequency signal), and then is transmitted to reception by reflecting antenna
System realizes geophysical exploration.
And when inversion bridge circuit meets and imposes a condition, low level failure control signal and first frequency signal (or
Second frequency signal) input is with door progress with after operation, and output signal is continuously low level, and device for power switching one is straightforward
Only, inversion bridge circuit does not have signal to be output to transmitting antenna, and reception system will not receive abnormal signal, so as to avoid ground
The situation of ball physical detecting inaccuracy occurs.
In other embodiments, if the first device for power switching T1, the second device for power switching T2, third power are opened
It closes device T3 and the 4th device for power switching T4 to be connected when control terminal is low level, and ends when control terminal is high level,
Then logic gates may include the first NAND gate, the second NAND gate, third NAND gate and the 4th NAND gate.First NAND gate,
The first input end of second NAND gate, third NAND gate and the 4th NAND gate is connect with fault detection circuit, the first NAND gate,
Second input terminal of the second NAND gate, third NAND gate and the 4th NAND gate is connect with signal generating circuit, the first NAND gate
Output end is connect with the control terminal of the first device for power switching, the output end of the second NAND gate and the second device for power switching
Control terminal connects, and the output end of third NAND gate is connect with the control terminal of third device for power switching, the output of the 4th NAND gate
End is connect with the control terminal of the 4th device for power switching.
Fig. 4 is the circuit diagram of failure control signal part provided in an embodiment of the present invention, referring to Fig. 4, optionally, failure
Detection circuit 10 may include device for power switching detection circuit 11, circuit for checking input signals 12 and output signal detection electricity
Road.
Device for power switching detection circuit 11, for detecting the first device for power switching, the second power switch device respectively
Part, third device for power switching, the 4th device for power switching input terminal and output end between voltage whether opened more than power
The maximum working voltage of device is closed, and exports fault feedback signal according to testing result；
Circuit for checking input signals 12, for detecting whether the voltage of input signal of inversion bridge circuit is more than voltage threshold
Value, and output overvoltage feedback signal according to testing result；
Output signal detection circuit 13, for detecting whether the electric current of output signal of inversion bridge circuit is more than current threshold
Value, and output overcurrent feedback signal according to testing result；
Logic gates 30 is used for, and failure is generated according to fault feedback signal, overcurrent feedback signal and over-pressed feedback signal
Control signal.
Specifically, device for power switching detection circuit 11 may include several logic elements and in inversion bridge circuit
The one-to-one voltage sensor of each device for power switching, analog-digital converter and comparator, voltage sensor are arranged in correspondence
Device for power switching input terminal and output end between, the input terminal of analog-digital converter is connected with corresponding voltage sensor,
The output end of analog-digital converter is connected with the input terminal of corresponding comparator, the output end of each comparator and several logic basis
Part connects, several logic element final output fault feedback signals.
Circuit for checking input signals 12 may include voltage sensor, analog-digital converter and comparator, and voltage sensor is set
The input terminal in inversion bridge circuit is set, the output end of analog-digital converter and the input terminal of comparator connect, the output end of comparator
Output overvoltage feedback signal.
Output signal detection circuit 13 may include current sensor, analog-digital converter and comparator, and current sensor is set
The output end in inversion bridge circuit is set, the output end of analog-digital converter and the input terminal of comparator connect, the output end of comparator
Output overcurrent feedback signal.
It should be noted that device for power switching detection circuit, circuit for checking input signals and output signal detection circuit
Main purpose be all to prevent the device for power switching in inversion bridge circuit from being damaged due to overcurrent, due to device for power switching
The overtension at both ends, the input voltage of inversion bridge circuit is excessively high may all cause device for power switching overcurrent, and inverter bridge is electric
The output current on road can reflect device for power switching whether overcurrent, therefore the present invention be respectively set device for power switching detection
Circuit, circuit for checking input signals and output signal detection circuit are detected, with ensure can in device for power switching overcurrent
It finds and handles in time.
Preferably, as shown in figure 4, the control circuit can also include：
Reset switch 41 generates reset signal for receiving reset instruction input by user, and according to reset instruction；
Logic gates 30 can be also used for, according to reset signal, to fault feedback signal, overcurrent feedback signal and mistake
Pressure feedback signal is resetted.
Or with the first device for power switching T1, the second device for power switching T2, third device for power switching T3 and the 4th
Device for power switching T4 is connected when control terminal is high level, and when control terminal is low level for cut-off, failure feedback letter
It is when the voltage of at least one device for power switching is more than the maximum working voltage of device for power switching number in inversion bridge circuit
Low level, on the contrary it is high level；Over-pressed feedback signal the output signal of inversion bridge circuit electric current be more than current threshold when be
Low level, on the contrary it is high level；Overcurrent feedback signal the output signal of inversion bridge circuit electric current be more than current threshold be for
Low level, on the contrary it is high level.Reset signal is high level when receiving reset instruction, is being not received by reset instruction
When be low level.
At this time as shown in figure 4, logic gates can also include the 5th with door A5, the 6th with door A6, the 7th and door A7,
8th with door A8, first or door B1, second or door B2 and third or door B3.5th opens with the first input end of door A5 with power
Units test circuit 11 is closed to connect, the 5th connect with the second input terminal of door A5 with the output end of first or door B1, and the 5th and door
The output end of A5 is connect with the first input end of first or door B1, and the second input terminal and the reset switch 41 of first or door B1 connect
It connects, the output end of first or door B1 is connect with the 8th with the first input end of door A8；6th with the first input end of door A6 with it is defeated
Enter signal deteching circuit 12 connection, the 6th connect with the second input terminal of door A6 with the output end of second or door B2, the 6th and
The output end of door A6 is connect with the first input end of second or door B2, the second input terminal and the reset switch 41 of second or door B2
Connection, the output end of second or door B2 are connect with the 8th with the second input terminal of door A8；7th with the first input end of door A7 with
Output signal detection circuit 13 connect, the 7th connect with the second input terminal of door A7 with the output end of third or door B3, the 7th and
The output end of door A7 is connect with the first input end of third or door B3, the second input terminal and the reset switch 41 of third or door B3
The output end of connection, third or door B3 are connect with the 8th with the third input terminal of door A8；8th with the output end of door A8 respectively with
First connect with the first input end of door A4 (referring to Fig. 3 and Fig. 4) with door A1, second and door A2, third and door A3, the 4th.
By taking fault feedback signal as an example, if fault feedback signal is low level, the 5th exports low level with door A5,
If user does not issue reset instruction, reset signal is low level, and first or door B1 exports low level, the 8th and door A8
Low level is exported, i.e. failure control signal is low level, and then inversion bridge circuit not work can be controlled according to failure control signal
Make.
If fault feedback signal becomes low level, user issues reset instruction, then reset signal be high level, first
Or door B1, second or door B2 and third or door B3 export high level, the 8th exports high level with door A8, i.e. Fault Control is believed
Number it is high level, inversion bridge circuit can work, and simultaneous faults feedback signal is reset to high level.
If fault-signal is still low level, user accidentally issues reset instruction, although being in reset signal then
Failure control signal is high level when high level, but after reset signal reverts to low level, first or door B1 still can be defeated
Go out low level, the 8th still exports low level with door A8, can cause harmful effect as far as possible.
The case where over-pressed feedback signal and overcurrent feedback signal, is similar with fault feedback signal, is no longer described in detail one by one herein.
In addition, the mechanism of overcurrent feedback signal and over-pressed feedback signal, all effect with above-mentioned fault feedback signal
Process is similar, is no longer described in detail one by one herein.
Fig. 5 is the circuit diagram provided in an embodiment of the present invention for starting and controlling signal section, referring to Fig. 5, optionally, control
Circuit can also include：
Starting switch 42 generates enabling signal for receiving enabled instruction input by user, and according to enabled instruction；
Logic gates 30 can be also used for, and is generated according to enabling signal and reset signal and starts control signal；According to opening
Dynamic control signal, failure control signal, first frequency signal and second frequency signal, control inversion bridge circuit are receiving again
It works after bit instruction and enabled instruction.
Signal control is controlled by the way that starting switch is arranged, and according to the startup that the enabling signal generated by starting switch generates
Inversion bridge circuit processed works after receiving reset instruction and enabled instruction, to avoid referring to due to accidentally issuing reset
Enable or enabled instruction and cause inversion bridge circuit work.
Or with the first device for power switching T1, the second device for power switching T2, third device for power switching T3 and the 4th
Device for power switching T4 is connected when control terminal is high level, and when control terminal is low level for cut-off, reset signal exists
It is high level when receiving reset instruction, is low level when being not received by reset instruction.Enabling signal is having power supply supply
When to receive after enabled instruction be high level, having power supply for being supplied before receiving enabled instruction at once or without power supply
At once it is low level.
At this time as shown in figure 5, logic gates 30 can also include the 4th or door B4 and the 9th and door A9.4th or door
The first input end of B4 is connect with reset switch 41, and the second input terminal of the 4th or door B4 and the output end of the 4th or door B4 connect
Connect, the output end of the 4th or door B4 is connect with the 9th with the first input end of door A9, the 9th with the second input terminal of door A9 with open
Dynamic switch 42 connects, the 9th with the output end of door A9 respectively with first with door A1, second and door A2, third and door A3, the 4th and
The third input terminal connection of door A4 (referring to Fig. 3 and Fig. 5).
Reset signal high level when receiving reset instruction, due to the output end and an input terminal of the 4th or door B4
Connection, therefore after receiving reset instruction, the 4th or door B4 can continue output high level.Enabling signal is connecing simultaneously
It receives enabling signal and is continuously high level, therefore after receiving enabled instruction, the 9th exports high level with door A9, that is, opens
Dynamic control signal is high level, and first can control the work of inversion bridge circuit with door A1 to the 4th and door A4 according to fault condition.
Fig. 6 is the structural schematic diagram of signal generating circuit provided in an embodiment of the present invention, referring to Fig. 6, optionally, signal
Generation circuit 20 may include oscillator 21, frequency divider 22 and NOT gate C1.
Wherein, oscillator 21, for generating third frequency signal；
Frequency divider 22 obtains first frequency signal for being divided to third frequency signal；
Logic gates 30 can be also used for, and carries out reverse phase to first frequency signal, obtains second frequency signal.
Specifically, as shown in fig. 6, logic gates 30 can also include NOT gate C1.
In specific implementation, the input terminal of frequency divider 22 is connect with oscillator 21, the output end of frequency divider 22 respectively with it is non-
The input terminal of door C1 first is connect with the input terminal of door A1, the 4th with the input terminal of door A4, the output end of NOT gate C1 respectively with
Second connect with the input terminal of the input terminal of door A2, third and door A3.
Preferably, control circuit can also include：
Signal parameter acquiring unit is believed for obtaining signal parameter input by user or pre-stored signal parameter
Number parameter is used to be arranged the frequency dividing ratio of frequency divider.
In practical applications, processor gets signal parameter by signal parameter acquiring unit, further according to signal parameter
Control frequency divider is divided.
Fig. 7 is the structural schematic diagram of signal parameter part provided in an embodiment of the present invention, and referring to Fig. 7, signal parameter obtains
Unit may include one in entering apparatus 43, output device 44, time acquisition device 45, memory device 46, selector 47
It is a or multiple.
Wherein, entering apparatus 43, for receiving signal parameter input by user；
Output device 44 is used for user's output signal parameter；
Time acquisition device 45, for obtaining current time；
Memory device 46, for storing signal parameter；
Selector 47, the signal parameter acquisition modes for receiving user's selection.
In practical applications, if user selects to obtain signal parameter from entering apparatus 43 by selector 47, believe
Number parameter may include the frequency of first frequency signal and second frequency signal, and user passes through first frequency of the input of entering apparatus 43
After the frequency of rate signal and second frequency signal, processor is according to the frequency control of first frequency signal and second frequency signal
Frequency divider processed divides third frequency signal, obtains first frequency signal and second frequency signal.Simultaneous processor passes through
Output device 44 shows the frequency that entering apparatus 43 inputs.
If user selects to obtain signal parameter from memory device 46 by selector 47, signal parameter can wrap
The frequency and generation time of first frequency signal and second frequency signal are included, after processor gets generation time, constantly
Current time is obtained by time acquisition device 45, if current time is identical as generation time, according to first frequency signal
Third frequency signal is divided with the FREQUENCY CONTROL frequency divider of second frequency signal, obtains first frequency signal and second
Frequency signal.
Optionally, which can also include：
Alarm, for alarming to user when inversion bridge circuit meets and imposes a condition.
User can be reminded to carry out troubleshooting in time by the way that alarm is arranged.
Fig. 8 is the hardware structure diagram of control circuit provided in an embodiment of the present invention, and referring to Fig. 8, control circuit includes scene
Programmable gate array (English：Field Programmable Gate Array, referred to as：FPGA) 100, clock source 110,
Digital Signal Processing (English：Digital Signal Processing, referred to as：DSP) 200, current sensor 310, voltage
Sensor 320, analog-digital converter 330, reset key 410, start button 420, input button 430, display screen 440, the whole world are fixed
Position system (English：Global Positioning System, referred to as：GPS) module 450, safe digital card (English：Secure
Digital Memory Card, referred to as：SD card) 460, selection key 470, indicator light 480.
Wherein, current sensor 310, voltage sensor 320 are connect with analog-digital converter 330 respectively, DSP 200 respectively with
FPGA 100, analog-digital converter 330, input button 430, display screen 440, GPS module 450, SD card 460, selection key 470
Connection, FPGA 100 are connect with clock source 110, DSP 200, reset key 410, start button 420, indicator light 480 respectively.
In practical applications, FPGA 100 can be used for realizing above-mentioned frequency divider and logic gates (including first with
Men Zhi nine and door, first or door to third or door, the first NOT gate), clock source 110 is used for realizing above-mentioned oscillator, DSP
In realizing above-mentioned comparator, reset key 410 is for realizing above-mentioned reset switch, and start button 420 is for realizing above-mentioned startup
Switch, input button 430 is for realizing above-mentioned entering apparatus, and display screen 440 is for realizing above-mentioned output device, GPS module
450 for realizing above-mentioned time acquisition device, SD card 460 for realizing above-mentioned memory device, selection key 470 for realizing
Above-mentioned selection device, indicator light 480 is for realizing above-mentioned alarm.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of control circuit of electromagnetics transmitter, the electromagnetics transmitter includes transmitting antenna and is connect with the transmitting antenna
Inversion bridge circuit, the inversion bridge circuit include the first device for power switching, the second device for power switching, third power switch
Device and the 4th device for power switching, the output end of first device for power switching are defeated with the third device for power switching
Enter end connection, the output end of second device for power switching is connect with the input terminal of the 4th device for power switching, described
The input terminal of the input terminal of first device for power switching and second device for power switching is connected and is connect with the anode of power supply,
The output end of the output end of the third device for power switching and the 4th device for power switching connect and with the power supply
Cathode connects；
It is characterized in that, the control circuit includes：
Fault detection circuit, for detecting whether the inversion bridge circuit meets setting condition, the setting condition includes following
At least one of condition：First device for power switching, second device for power switching, the third power switch device
Voltage in part, the 4th device for power switching between at least one input terminal and output end is more than device for power switching
Maximum working voltage；The voltage of the input signal of the inversion bridge circuit is more than voltage threshold；The output of the inversion bridge circuit
The electric current of signal is more than current threshold；
Signal generating circuit, for providing first frequency signal and second frequency signal, the second frequency signal is described
The inversion signal of one frequency signal；
Logic gates is opened with first device for power switching, second device for power switching, the third power respectively
It closes device to connect with the control terminal of the 4th device for power switching, for being produced according to the testing result of the fault detection circuit
Raw failure control signal；According to the failure control signal, the first frequency signal and the second frequency signal, institute is controlled
It states inversion bridge circuit to work when being unsatisfactory for the setting condition, not work when meeting the setting condition.
2. control circuit according to claim 1, which is characterized in that the logic gates includes first and door, second
With door, third and door and the 4th and door；Described first with door, described second with door, the third and door, the described 4th with door
First input end is connect with the fault detection circuit, described first with door, described second with door, the third and door, described
4th connect with the second input terminal of door with the signal generating circuit, the described first output end with door and first power
The control terminal of switching device connects, and described second connect with the output end of door with the control terminal of second device for power switching,
The output end of the third and door is connect with the control terminal of the third device for power switching, the described 4th with the output end of door with
The control terminal of 4th device for power switching connects.
3. control circuit according to claim 2, which is characterized in that the fault detection circuit includes：
Device for power switching detection circuit, for detecting first device for power switching, the second power switch device respectively
Part, the third device for power switching, the 4th device for power switching input terminal and output end between voltage whether surpass
The maximum working voltage of overpower switching device, and fault feedback signal is exported according to testing result；
Circuit for checking input signals, for detecting whether the voltage of input signal of the inversion bridge circuit is more than voltage threshold,
And output overvoltage feedback signal according to testing result；
Output signal detection circuit, for detecting whether the electric current of output signal of the inversion bridge circuit is more than current threshold,
And output overcurrent feedback signal according to testing result；
The logic gates is used for, according to the fault feedback signal, the overcurrent feedback signal and the over-pressed feedback letter
Number generate the failure control signal.
4. control circuit according to claim 3, which is characterized in that the control circuit further includes：
Reset switch generates reset signal for receiving reset instruction input by user, and according to the reset instruction；
The logic gates is additionally operable to, according to the reset signal, to the fault feedback signal, the overcurrent feedback signal
It is resetted with the over-pressed feedback signal.
5. control circuit according to claim 4, which is characterized in that the logic gates further includes the 5th and door, the
Six with door, the 7th with door, the 8th with door, first or door, second or door and third or door；Described 5th with the first input end of door
Connect with the device for power switching detection circuit, the described 5th with the second input terminal of door and described first or the output end of door
Connection, the described 5th connect with the output end of door with the first input end of described first or door, described first or door it is second defeated
Enter end to connect with the reset switch, described first or the output end of door connect with the first input end of door with the described 8th；Institute
It states the 6th to connect with the first input end of door with the circuit for checking input signals, the described 6th the second input terminal and institute with door
The output end connection of second or door is stated, the described 6th connect with the output end of door with the first input end of described second or door, institute
State second or the second input terminal of door connect with the reset switch, described second or door output end and the described 8th and door
Second input terminal connects；Described 7th connect with the first input end of door with the output signal detection circuit, the described 7th with
Second input terminal of door connect with the output end of the third or door, the described 7th and door output end and the third or door
First input end connects, and the second input terminal of the third or door is connect with the reset switch, the output of the third or door
End is connect with the described 8th with the third input terminal of door；Described 8th with the output end of door respectively with described first and door, described
Second connect with door, the described 4th with the first input end of door with door, the third.
6. control circuit according to claim 4, which is characterized in that the control circuit further includes：
Starting switch generates enabling signal for receiving enabled instruction input by user, and according to the enabled instruction；
The logic gates is additionally operable to, and is generated according to the enabling signal and the reset signal and is started control signal；According to
Startup control signal, the failure control signal, the first frequency signal and the second frequency signal, described in control
Inversion bridge circuit works after receiving the reset instruction and the enabled instruction.
7. control circuit according to claim 6, which is characterized in that the logic gates further includes the 4th or door and
Nine and door, the described 4th or the first input end of door connect with the reset switch, the described 4th or door the second input terminal with
Described 4th or door output end connection, the described 4th or the output end of door connect with the described 9th with the first input end of door,
Described 9th connect with the second input terminal of door with the starting switch, the described 9th with the output end of door respectively with described first
It is connect with the third input terminal of door with door, the described 4th with door, the third with door, described second.
8. according to claim 1~7 any one of them control circuit, which is characterized in that the signal generating circuit includes：
Oscillator, for generating third frequency signal；
Frequency divider obtains the first frequency signal for being divided to the third frequency signal；
The logic gates is additionally operable to, and is carried out reverse phase to the first frequency signal, is obtained the second frequency signal.
9. control circuit according to claim 8, which is characterized in that the control circuit further includes：
Signal parameter acquiring unit, for obtaining signal parameter input by user or pre-stored signal parameter, the letter
Number parameter is used to be arranged the frequency dividing ratio of the frequency divider.
10. according to claim 1~7 any one of them control circuit, which is characterized in that the control circuit further includes：
Alarm, for alarming to user when the inversion bridge circuit meets the setting condition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429604.8A CN108333633B (en) | 2017-12-26 | 2017-12-26 | Control circuit of electromagnetic transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429604.8A CN108333633B (en) | 2017-12-26 | 2017-12-26 | Control circuit of electromagnetic transmitter |
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| CN108333633B CN108333633B (en) | 2020-10-27 |
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