CN109768785A - A kind of RT system of emergency stop control circuit and integrated CT - Google Patents
A kind of RT system of emergency stop control circuit and integrated CT Download PDFInfo
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- CN109768785A CN109768785A CN201910164207.5A CN201910164207A CN109768785A CN 109768785 A CN109768785 A CN 109768785A CN 201910164207 A CN201910164207 A CN 201910164207A CN 109768785 A CN109768785 A CN 109768785A
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Abstract
The embodiment of the invention discloses the RT systems of a kind of emergency stop control circuit and integrated CT.Emergency stop control circuit includes: signal transformation circuit, and the input terminal of signal transformation circuit is electrically connected with emergent stop signal input terminal, and signal transformation circuit is used to self-recovering type emergent stop signal being shaped as pulse signal, or self-locking emergent stop signal is shaped as step signal；Pulse control circuit, the input terminal of pulse control circuit are electrically connected with the output end of signal transformation circuit, and output end is electrically connected with emergent stop signal output end；Pulse control circuit is used for when its input terminal receives pulse signal or step signal, in the pulse signal of its output end output predetermined width.The embodiment of the present invention simulates self-recovering type emergent stop signal by signal transformation circuit and pulse control circuit, meet self-recovering type emergency stop demand, it realizes that self-recovering type emergency stop is controlled it is not necessary that scram button and emergency stop control circuit are in addition arranged on electricity system, improves the timeliness and safety of emergency stop control.
Description
Technical field
The present embodiments relate to electronic circuit technology field more particularly to a kind of RT of emergency stop control circuit and integrated CT
System.
Background technique
Emergency stop control circuit is widely used on large and medium-sized machinery equipment or electrical equipment as a kind of safeguard measure,
To prevent the equipment under contingency condition from causing harm to the human body.In large medical equipment, emergency stop control circuit is used for urgent item
Stop the movement, scanning and line journey out of big component under part.
In CT scan (Computed Tomography, CT) system, in order to protect bulb and extension
The service life of bulb, the emergency stop control of bulb power circuit use self-recovering type emergency stop control program first to break that is, after emergency stop triggering
Then electricity restores to power on.In radiotherapy (Radiation Therapy, RT) system, due to safety concerns, radiotherapy power circuit
Emergency stop control use self-locking emergency stop scheme, i.e., emergency stop triggering after, radiotherapy power circuit is powered off and is locked.
In the RT system of integrated CT, including CT module and RT module, it can use CT in the operational process of RT module
Module carries out accurate simulator locating, is advantageously implemented quick, accurate, the efficient radiotherapy of RT system.However, by aforementioned point
Analysis needs to be directed to CT module and RT mould it is found that CT module is different from the framework of the emergency stop control circuit of RT module and control mode
Scram button and emergency stop control circuit is respectively set in block, in system emergency stop, needs successively to press two scram buttons, emergency stop control
The triggered time of system is longer, and the timeliness of emergency stop control and safety are poor.
Summary of the invention
The embodiment of the present invention provides a kind of emergency stop control circuit and the RT system of integrated CT, to promote the timely of emergency stop control
Property and safety.
In a first aspect, the emergency stop control circuit includes: emergency stop letter the embodiment of the invention provides a kind of emergency stop control circuit
Number input terminal and emergent stop signal output end；
Signal transformation circuit, the signal transformation circuit include input terminal and output end, the signal transformation circuit it is defeated
Enter end to be electrically connected with the emergent stop signal input terminal, the signal transformation circuit is used to self-recovering type emergent stop signal being shaped as arteries and veins
Signal is rushed, or self-locking emergent stop signal is shaped as step signal；
Pulse control circuit, the pulse control circuit include input terminal and output end；The pulse control circuit it is defeated
Enter end to be electrically connected with the output end of the signal transformation circuit, output end is electrically connected with the emergent stop signal output end；The arteries and veins
Control circuit is rushed for exporting the arteries and veins of predetermined width in its output end when its input terminal receives pulse signal or step signal
Rush signal.
Optionally, the pulse control circuit further include:
Switch module, the first end of the switch module are electrically connected with the input terminal of the pulse control circuit, second end
It is electrically connected with the output end of the pulse control circuit；
Energy-storage module, the energy-storage module include input terminal and output end, the input terminal of the energy-storage module and the arteries and veins
Rush the input terminal electrical connection of control circuit；The energy-storage module is for receiving the pulse signal or the step signal
When, the voltage for controlling its output end is increased to first voltage within a preset time；
Drive module, the drive module include first input end, the second input terminal and output end, the drive module
First input end is electrically connected with the output end of the energy-storage module, and the second input terminal inputs first voltage, and output end is opened with described
Close the control terminal electrical connection of module；The voltage value that the drive module is used to input in its first input end is greater than first voltage
When, drive the switch module to turn off.
Optionally, the energy-storage module includes:
First resistor, the first end of the first resistor are electrically connected with the input terminal of the energy-storage module, second end and institute
State the output end electrical connection of energy-storage module；
Capacitor, the first end of the capacitor are electrically connected with the output end of the energy-storage module, the second termination of the capacitor
Ground.
Optionally, the drive module includes:
First comparator, the first input end of the first comparator and the first input end of the drive module are electrically connected
It connects, the second input terminal is electrically connected with the second input terminal of the drive module；
The first transistor, the control terminal of the first transistor is electrically connected with the output end of the first comparator, described
The first end of the first transistor is electrically connected with the output end of the drive module, the second end ground connection of the first transistor；
Second resistance, the first end of the second resistance input second voltage, the second end of the second resistance with it is described
The output end of drive module is electrically connected.
Optionally, the pulse control circuit further include: 3rd resistor；
The first end of the 3rd resistor is electrically connected with the second end of the switch module, the second end of the 3rd resistor
Ground connection.
Optionally, the emergency stop control circuit further include:
Discharge circuit, the discharge circuit include first input end, the second input terminal and output end, the discharge circuit
First input end is electrically connected with the output end of the signal transformation circuit, and the second input terminal inputs tertiary voltage, the electric discharge electricity
The output end on road is electrically connected with the output end of the energy-storage module；The discharge circuit is used for after emergent stop signal stopping to described
Energy-storage module discharges.
Optionally, the discharge circuit further include:
The first input end of second comparator, the first input end and the discharge circuit of second comparator is electrically connected
It connects, the second input terminal is electrically connected with the second input terminal of the discharge circuit；
Second transistor, the control terminal of the second transistor is electrically connected with the output end of second comparator, described
The first end of second transistor is electrically connected with the output end of the discharge circuit, the second end ground connection of the second transistor；
4th resistance, the first end of the 4th resistance input the 4th voltage, the second end of the 4th resistance with it is described
The control terminal of second transistor is electrically connected.
Optionally, the signal transformation circuit further include:
Disappear twitter circuit, and the twitter circuit that disappears includes input terminal and output end, the input terminal and the letter of the twitter circuit that disappears
The input terminal electrical connection of number shaping circuit；
Monostable circuit, the monostable circuit include input terminal and output end, the input terminal of the monostable circuit with
The output end of the twitter circuit that disappears is electrically connected, and output end is electrically connected with the output end of signal transformation circuit；The monostable circuit
For self-recovering type emergent stop signal to be shaped as pulse signal, or self-locking emergent stop signal is shaped as step signal.
Optionally, the pulse letter that the output end that the pulse width of the pulse signal is greater than the pulse control circuit exports
Number pulse width.
Second aspect, the RT system the embodiment of the invention also provides the RT system of integrated CT a kind of, the integrated CT include:
Scram button and the emergency stop control circuit as described in any embodiment of that present invention；
Wherein, the scram button is electrically connected with the emergent stop signal input terminal.
Emergent stop signal can be converted to tool by setting signal shaping circuit and pulse control circuit by the embodiment of the present invention
There are the pulse signal of predetermined width, i.e. simulation self-recovering type emergent stop signal, to meet self-recovering type emergency stop demand.With existing skill
Art is compared, in addition the embodiment of the present invention is without being arranged scram button and emergency stop control circuit on electricity system to realize self- recoverage
Formula emergency stop control, it is only necessary to increase signal transformation circuit and pulse control circuit, so that it may on the basis of self-locking emergency stop control
It above while realizing that self-recovering type emergency stop controls, reduces production cost.In system emergency stop, as long as pressing next scram button,
It can realize the control of self-locking emergency stop and the control of self-recovering type emergency stop, so as to shorten the emergency stop triggered time, improve emergency stop
The timeliness and safety of control.In addition, emergency stop control circuit provided in an embodiment of the present invention not only can be by self-locking emergency stop
Signal is converted to the pulse signal with predetermined width, can also be converted to self-recovering type emergent stop signal with predetermined width
Pulse signal, therefore, the compatibility of the embodiment of the present invention is more preferable, the scope of application is wider.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of emergency stop control circuit provided in an embodiment of the present invention；
Fig. 2 is the waveform input signal and signal output waveform of a kind of signal transformation circuit provided in an embodiment of the present invention
Waveform diagram；
Fig. 3 is the waveform input signal and signal output waveform of another signal transformation circuit provided in an embodiment of the present invention
Waveform diagram；
Fig. 4 is the waveform input signal and signal output waveform of a kind of pulse control circuit provided in an embodiment of the present invention
Waveform diagram；
Fig. 5 is the waveform input signal and signal output waveform of another pulse control circuit provided in an embodiment of the present invention
Waveform diagram；
Fig. 6 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention；
Fig. 7 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention；
Fig. 8 is a kind of circuit diagram of energy-storage module provided in an embodiment of the present invention；
Fig. 9 is the circuit diagram of another energy-storage module provided in an embodiment of the present invention；
Figure 10 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention；
Figure 11 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention；
Figure 12 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of circuit diagram of emergency stop control circuit provided in an embodiment of the present invention.Referring to Fig. 1, emergency stop control
Circuit includes: emergent stop signal input terminal, emergent stop signal output end, signal transformation circuit 100 and pulse control circuit 200.Signal
Shaping circuit 100 includes input terminal 101 and output end 102, and the input terminal 101 and emergent stop signal of signal transformation circuit 100 input
End electrical connection, signal transformation circuit 100 are used to self-recovering type emergent stop signal being shaped as pulse signal, or by self-locking emergency stop
Signal shaping is step signal.Pulse control circuit 200 includes input terminal 201 and output end 202；Pulse control circuit 200
Input terminal 201 is electrically connected with the output end 102 of signal transformation circuit 100, and output end 202 is electrically connected with emergent stop signal output end；
Pulse control circuit 200 is used for when its input terminal 201 receives pulse signal or step signal, is exported in its output end 202
The pulse signal of predetermined width.
Wherein, emergent stop signal input terminal can be for example electrically connected with scram button, after scram button is pressed, scram button
The emergent stop signal of generation is input to emergent stop signal input terminal.The emergent stop signal can be self-recovering type emergent stop signal, self-recovering type
The level change situation of emergent stop signal for example may is that before scram button is pressed as high level；It is after scram button is pressed
Low level, and high level is reverted to after a certain time, self-recovering type emergent stop signal can be equivalent to inverted burst signal.The emergency stop
Signal can also be self-locking emergent stop signal, and the level change situation of self-locking emergent stop signal for example may is that in scram button
It is high level before pressing；It is low-voltage after scram button is pressed, and locks, self-locking emergent stop signal can be equivalent to anti-step
Signal.
Fig. 2 is the waveform input signal and signal output waveform of a kind of signal transformation circuit provided in an embodiment of the present invention
Waveform diagram, Fig. 3 are the waveform input signal and output signal of another signal transformation circuit provided in an embodiment of the present invention
The waveform diagram of waveform.Referring to figs. 2 and 3, illustratively, respectively with self-recovering type emergent stop signal and self-locking emergent stop signal
For the working principle of signal transformation circuit 100 is illustrated.Referring to fig. 2, if emergent stop signal is self-recovering type emergent stop signal,
The self-recovering type emergent stop signal can be shaped as pulse signal by signal transformation circuit 100, to cut down the shake in emergent stop signal
And burr.Further, the recovery time of self-recovering type emergent stop signal is different (for example, recovery time is respectively t1 and t2), letter
The self-recovering type emergent stop signal can be shaped as the pulse signal that pulse width tw0 is equal by number shaping circuit 100.Referring to figure
3, if emergent stop signal is self-locking emergent stop signal, which can be shaped as step by signal transformation circuit 100
Signal, to cut down shake and the burr in emergent stop signal.With continued reference to Fig. 2 and Fig. 3, further, signal transformation circuit 100 is also
It can according to need the emergent stop signal progress reverse phase for being inputted 101 input of end, to adapt to 200 pairs of inputs letters of pulse control circuit
Number level demand.
Fig. 4 is the waveform input signal and signal output waveform of a kind of pulse control circuit provided in an embodiment of the present invention
Waveform diagram, Fig. 5 are the waveform input signal and output signal of another pulse control circuit provided in an embodiment of the present invention
The waveform diagram of waveform.Illustratively believed respectively with 201 input pulse signal of arteries and veins input terminal and step with Fig. 5 referring to fig. 4
Pulse control circuit 200 is illustrated for number.Referring to fig. 4, if the incoming wave of the input terminal 201 of pulse control circuit 200
The pulse width of shape 251 is the pulse signal of tw0, the pulse of the output waveform 252 of the output end 202 of pulse control circuit 200
Width is the pulse signal of tw1.Optionally, the pulse width tw0 of pulse signal is greater than the output end of pulse control circuit 200
Predetermined width tw1, i.e. the tw0 > tw1 of the pulse signal of 202 outputs stablize output pulse to be conducive to pulse control circuit 200
Signal.Referring to Fig. 5, if the input waveform 261 of the input terminal 201 of pulse control circuit 200 is step signal, pulse control circuit
The output waveform 262 of 200 output end 202 is the pulse signal that pulse width is tw1, that is, passes through 200 mould of pulse control circuit
It is quasi- to generate self-recovering type emergent stop signal.Wherein, the predetermined width tw1 of pulse signal can according to the needs of rear class control circuit into
Row setting, for example, late-class circuit, which requires pulse width to reach 100ms or more, then sets at least 100ms for predetermined width.
Emergent stop signal output end is used to export the emergent stop signal after conversion, which for example can be applied to collect
At the RT system of CT or other need to provide the system of self-recovering type emergent stop signal.In the RT system of integrated CT, emergent stop signal
Output end can be electrically connected with the bulb power circuit of CT module.After scram button takes, self-locking emergent stop signal is transmitted to
RT module handles obtained simulation self-recovering type emergent stop signal by signal transformation circuit 100 and pulse control circuit 200 and transmits
To the bulb power circuit of CT module, to provide self-recovering type emergent stop signal to bulb power circuit.
The embodiment of the present invention can be turned emergent stop signal by setting signal shaping circuit 100 and pulse control circuit 200
It is changed to the pulse signal with predetermined width, i.e. simulation self-recovering type emergent stop signal, to meet self-recovering type emergency stop demand.With
The prior art is compared, in addition the embodiment of the present invention is without being arranged scram button and emergency stop control circuit on electricity system to realize
Self-recovering type emergency stop control, it is only necessary to increase signal transformation circuit 100 and pulse control circuit 200, so that it may in self-locking urgency
Stop realizing the control of self-recovering type emergency stop on the basis of control, reduces production cost.In system emergency stop, as long as pressing next urgency
Stop button, so that it may the control of self-locking emergency stop and the control of self-recovering type emergency stop are realized, to improve the timeliness of emergency stop control
And safety.In addition, self-locking emergent stop signal can be not only converted to tool by emergency stop control circuit provided in an embodiment of the present invention
There is the pulse signal of predetermined width tw1, self-recovering type emergent stop signal can also be converted to the pulse letter with predetermined width tw1
Number, therefore, the compatibility of the embodiment of the present invention is more preferable, the scope of application is wider.
Fig. 6 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention.Referring to Fig. 6, above-mentioned
On the basis of each embodiment, optionally, pulse control circuit 200 further include: switch module 210, energy-storage module 220 and driving mould
Block 230.The first end of switch module 210 is electrically connected with the input terminal 201 of pulse control circuit 200, second end and pulse control
The output end 202 of circuit 200 is electrically connected.Energy-storage module 220 include input terminal and output end, the input terminal of energy-storage module 220 with
The input terminal 201 of pulse control circuit 200 is electrically connected；Energy-storage module 220 is used for when receiving pulse signal or step signal,
The voltage for controlling its output end is increased to first voltage V within a preset time1.Drive module 230 includes first input end, second
The first input end of input terminal and output end, drive module 230 is electrically connected with the output end of energy-storage module 220, the second input terminal
Input first voltage V1, output end is electrically connected with the control terminal of switch module 210；Drive module 230 is used in its first input
The voltage value of end input is greater than first voltage V1When, driving switch module 210 turns off.
Wherein, switch module 210 can be controlled according to the output of drive module 230 its first end and second end conducting or
Shutdown.Switch module 210 for example may include transistor, preferably Metal Oxide Semiconductor Field Effect Transistor (metal
Oxide semiconductor, metal-oxide-semiconductor) Q1, the first end of metal-oxide-semiconductor is electrically connected with the first end of the switch module 210, MOS
The second end of pipe is electrically connected with the second end of switch module 210, and the control terminal of metal-oxide-semiconductor and the control terminal of switch module 210 are electrically connected
It connects.
Illustratively, the course of work of the pulse control circuit 200 is to receive pulse signal or step in its input terminal
When signal, energy-storage module 220 starts energy storage, and the voltage of the output end of energy-storage module 220 starts to increase；The of drive module 230
The voltage that one input terminal receives is lower than the first voltage V of its second input terminal input1, 230 control switch module of drive module
210 conductings, the voltage transmission of the first end of switch module 210 to second end；When the first input end of drive module 230 receives
Voltage be higher than its second input terminal input first voltage V1When (voltage of the output end of energy-storage module 220 is increased to
One voltage V1), the second end of the shutdown of 230 control switch module 210 of drive module, switch module 210 exports low-voltage.That is this hair
Bright embodiment includes switch module 210, energy-storage module 220 and drive module 230 by setting pulse control circuit 200 no matter
The input of its input terminal 201 is pulse signal or step signal, arteries and veins that can be certain in its 202 output pulse width of output end
Rush signal.
Fig. 7 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention.Referring to Fig. 7, above-mentioned
On the basis of each embodiment, optionally, energy-storage module 220 includes: first resistor R1With capacitor C.First resistor R1First end with
The input terminal of energy-storage module 220 is electrically connected, and second end is electrically connected with the output end of energy-storage module 220.The first end and storage of capacitor C
The output end electrical connection of energy module 220, the second end ground connection of capacitor C.
Wherein, first resistor R1RC circuit is constituted with capacitor C, the voltage of the output end of energy-storage module 220 is increased to first
Voltage V1Time can be obtained by following formula:
Wherein, V0Indicate the high level of pulse signal or step signal.The embodiment of the present invention is by adjusting first resistor R1With
The pulse width of the Parameter adjustable section simulation self- recoverage signal of capacitor C is to meet different system requirements.The embodiment of the present invention provides
Energy-storage module 220 circuit structure it is simple, circuit cost is low, is easily achieved, therefore have preferable practicability.
It should be noted that a kind of circuit diagram of energy-storage module 220 is schematically illustrated in Fig. 7, not to this
The restriction of invention may be arranged as Fig. 8 and circuit structure shown in Fig. 9 in other embodiments, in practical applications can be with
It is configured as needed.Specifically, energy-storage module 220 as shown in fig. 8 further includes resistance R6, resistance R6It connects with capacitor C
Connection；The energy-storage module 220 shown in Fig. 9 further includes resistance R7, resistance R7It is connected in parallel with capacitor C.
With continued reference to Fig. 7, on the basis of the various embodiments described above, optionally, drive module 230 includes: first comparator
U1, the first transistor T1With second resistance R2.First comparator U1First input end and drive module 230 first input end
Electrical connection, the second input terminal are electrically connected with the second input terminal of drive module 230.The first transistor T1Control terminal with first ratio
Compared with device U1Output end electrical connection, the first transistor T1First end be electrically connected with the output end of drive module 230, first crystal
Pipe T1Second end ground connection.Second resistance R2First end input second voltage V2, second resistance R2Second end and drive module
230 output end electrical connection.
Illustratively, first comparator U1First input end be normal phase input end, the second input terminal be inverting input terminal,
The first transistor T1For triode.The course of work of the drive module 230 is first comparator U1For energy-storage module 220 is defeated
The voltage and first voltage V of outlet output1It is compared, as first comparator U1First input end input voltage lower than the
One voltage V1When, first comparator U1Export low-voltage, the first transistor T1Shutdown, second voltage V2It exports to drive module 230
Output end, with control switch module 210 conducting；After preset time, as first comparator U1First input end input electricity
Pressure is higher than first voltage V1When, first comparator U1Output HIGH voltage, the first transistor T1Conducting, drags down the defeated of drive module 230
The voltage of outlet, with the shutdown of control switch module 210.The circuit structure of drive module 230 provided in an embodiment of the present invention is simple,
Circuit cost is low, is easily achieved, therefore has preferable practicability.
With continued reference to Fig. 7, on the basis of the various embodiments described above, optionally, pulse control circuit 200 further include: third
Resistance R3, 3rd resistor R3First end be electrically connected with the second end of switch module 210,3rd resistor R3Second end ground connection, with
Ensure that the output end 202 of pulse control circuit 200 exports low level when switch module 210 turns off, promotes output pulse signal
Stability.
Figure 10 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention.Referring to Figure 10, upper
On the basis of stating each embodiment, optionally, emergency stop control circuit further include: discharge circuit 300, discharge circuit 300 include first
Input terminal 301, the second input terminal 302 and output end 303, the first input end 301 and signal transformation circuit of discharge circuit 300
100 output end 102 is electrically connected, and the second input terminal 302 inputs tertiary voltage V3, the output end 303 of discharge circuit 300 and energy storage
The output end of module 220 is electrically connected；Discharge circuit 300 is used for after emergent stop signal stopping, being discharged energy-storage module 220.
Illustratively, the interval of two self-recovering type emergent stop signals of emergent stop signal input terminal input is very short, if being not provided with discharge circuit
300, when next self-recovering type emergent stop signal arrives, energy-storage module 220 does not discharge completion, so that the voltage of its output end
Rise to first voltage V1Time shorten.Discharge circuit 300 is arranged in the embodiment of the present invention, is conducive to the fast of energy-storage module 220
Speed electric discharge, it is ensured that the voltage of the output end of energy-storage module 220 rises to first voltage V1Time consistency, ensure that defeated
The pulse width of pulse signal is consistent out, improves the stability of output pulse signal, reduces security risk.
With continued reference to Figure 10, on the basis of the various embodiments described above, optionally, discharge circuit 300 further include: second compares
Device U2, second transistor Q2With the 4th resistance R4.Second comparator U2First input end and discharge circuit 300 first input
301 electrical connection of end, the second input terminal are electrically connected with the second input terminal 302 of discharge circuit 300.Second transistor Q2Control terminal
With the second comparator U2Output end electrical connection, second transistor Q2First end and the output end 303 of discharge circuit 300 be electrically connected
It connects, second transistor Q2Second end ground connection.4th resistance R4First end input the 4th voltage V4, the 4th resistance R4Second
End and second transistor Q2Control terminal electrical connection.
Illustratively, the second comparator U2First input end be inverting input terminal, the second input terminal be normal phase input end,
Second transistor Q2For metal-oxide-semiconductor.The course of work of the drive module 230 is first comparator U1For by emergent stop signal input terminal
Voltage and tertiary voltage V3It is compared, as the second comparator U2First input end input voltage be lower than tertiary voltage V3
When, first comparator U1Output HIGH voltage, second transistor Q2Conducting, the voltage ground of the output end of energy-storage module 220 is put
Electricity.The circuit structure of discharge circuit 300 provided in an embodiment of the present invention is simple, circuit cost is low, is easily achieved, thus have compared with
Good practicability.
Figure 11 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention.Referring to Figure 11, upper
On the basis of stating each embodiment, the embodiment of the invention also provides a kind of embodiments of specific emergency stop control circuit.Wherein,
Switch module 210 includes metal-oxide-semiconductor Q1, and energy-storage module 220 includes first resistor R1With capacitor C, drive module 230 includes the first ratio
Compared with device U1, the first transistor T1With second resistance R2, pulse control circuit further includes 3rd resistor R3, discharge circuit 300 includes the
Two comparator U2, second transistor Q2With the 4th resistance R4, the second comparator U2First end and signal transformation circuit 100 it is defeated
Connect the 5th resistance R between outlet 1025, also gone here and there between the output end 202 and pulse signal output end of pulse control circuit 200
It is associated with and negates circuit 400.The emergency stop control circuit course of work is as follows:
Before scram button takes, the output end 102 of emergent stop signal input terminal input high level, signal transformation circuit 100 is defeated
Low level out；Second comparator U2Export high level；Second transistor Q2Conducting；First comparator U1Normal phase input end input
Low level, first comparator U1Export low level；The first transistor T1Shutdown；Metal-oxide-semiconductor Q1Control terminal input second voltage V2,
Metal-oxide-semiconductor Q1Conducting, metal-oxide-semiconductor Q1Second end export low level；Negate the output end output high level of circuit 400；
After scram button takes, the output end 102 of emergent stop signal input terminal input low level, signal transformation circuit 100 is defeated
High level out；Second comparator U2Export low level；Second transistor Q2Shutdown, discharge circuit 300 do not work；First comparator
U1Normal phase input end input voltage increase, be increased to first voltage V1Before, first comparator U1Export low level；The
One transistor T1Shutdown；Metal-oxide-semiconductor Q1Control terminal input second voltage V2, metal-oxide-semiconductor Q1Conducting, metal-oxide-semiconductor Q1Second end export it is high
Level；Negate the output end output low level of circuit 400；In first comparator U1Normal phase input end input voltage be increased to
First voltage V1Later, first comparator U1Output switching activity becomes high level；The first transistor T1Conducting；Metal-oxide-semiconductor Q1Control
End ground connection, metal-oxide-semiconductor Q1Shutdown, metal-oxide-semiconductor Q1Second end export low level；Negate the output end output high level of circuit 400；It is anxious
Stop control circuit and realizes simulation self-recovering type emergent stop signal output；
If emergent stop signal be self-recovering type emergent stop signal, scram button take after certain time, emergent stop signal input terminal
The output end 102 of input low level, signal transformation circuit 100 exports high level；Second comparator U2Export low level；Second is brilliant
Body pipe Q2Shutdown, in first comparator U1Normal phase input end input voltage be increased to first voltage V1, first comparator U1It is defeated
It overturns out, becomes high level；The first transistor T1Conducting；Metal-oxide-semiconductor Q1Control terminal ground connection, metal-oxide-semiconductor Q1Shutdown, metal-oxide-semiconductor Q1?
Two ends export low level；Negate the output end output high level of circuit 400；Emergency stop control circuit realizes simulation self-recovering type emergency stop
Signal output.
The circuit structure of emergency stop control circuit provided in an embodiment of the present invention is simple, circuit cost is low, is easily achieved, with
And entire circuit is realized using hardware connection mode, and the conversion of signal, medical electric are realized without programmable logic device such as FPGA
Part out of breath of stopping meets national standard, has preferable practicability.
Figure 12 is the circuit diagram of another emergency stop control circuit provided in an embodiment of the present invention.Referring to Figure 12, upper
On the basis of stating each embodiment, optionally, signal transformation circuit 100 further include: disappear twitter circuit 110 and monostable circuit 120.Disappear
Twitter circuit 110 includes input terminal and output end, and the input terminal for the twitter circuit 110 that disappears and the input terminal 101 of signal transformation circuit 100 are electric
Connection.Monostable circuit 120 includes input terminal and output end, the output of the input terminal of monostable circuit 120 and the twitter circuit 110 that disappears
End electrical connection, output end are electrically connected with the output end 102 of signal transformation circuit 100；Monostable circuit 120 is used for self-recovering type
Emergent stop signal is shaped as pulse signal, or self-locking emergent stop signal is shaped as step signal.
Wherein, the twitter circuit 110 that disappears can eliminate the shake of scram button, to avoid rear class monostable circuit 120 by mistake
Signal handled.Monostable circuit 120 has two kinds of working conditions of stable state and transient state, when being triggered without external signal, electricity
Road is in stable state (for example, output low level), and under external signal triggering, circuit is turned to transient state (for example, output is high from stable state
Level), and after a period of time, circuit can automatically return to stable state (for example, output low level), therefore, monostable again
The pulse signal of different pulse widths can be shaped as same pulse width by circuit 120.Monostable circuit 120 for example can be with
Time base circuit is built, and the pulse width that monostable circuit 120 exports can be determined by circuit parameter.
The embodiment of the invention also provides the RT systems of integrated CT a kind of.The RT system of the integrated CT includes: scram button
With emergency stop control circuit such as provided by any embodiment of the invention.Wherein, scram button is electrically connected with emergent stop signal input terminal.
Emergent stop signal can be converted to tool by setting signal shaping circuit and pulse control circuit by the embodiment of the present invention
There are the pulse signal of predetermined width, i.e. simulation self-recovering type emergent stop signal, to meet self-recovering type emergency stop demand.With existing skill
Art is compared, and the embodiment of the present invention is not necessarily to that scram button and emergency stop control circuit is in addition arranged in the RT system of integrated CT to realize
Self-recovering type emergency stop control, it is only necessary to increase signal transformation circuit and pulse control circuit, so that it may be controlled in self-locking emergency stop
RT system on the basis of simultaneously realize self-recovering type emergency stop control, reduce production cost.In system emergency stop, as long as pressing
One scram button, so that it may the control of self-locking emergency stop and the control of self-recovering type emergency stop are realized, when so as to shorten emergency stop triggering
Between, improve the timeliness and safety of emergency stop control.In addition, emergency stop control circuit provided in an embodiment of the present invention not only can be with
Self-locking emergent stop signal is converted into the pulse signal with predetermined width, self-recovering type emergent stop signal can also be converted to tool
There is the pulse signal of predetermined width, therefore, the compatibility of the embodiment of the present invention is more preferable, the scope of application is wider.
It should be noted that in the above-described embodiments, for a scram button is set in the RT system in integrated CT
It is illustrated, not limitation of the invention, illustratively, one emergency stop of setting in the RT equipment of integrated CT can also be set and pressed
A scram button is arranged in control room in button, and emergency stop operation can be triggered by arbitrarily taking one of scram button, with enhancing
The timeliness of emergency stop control.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of emergency stop control circuit characterized by comprising emergent stop signal input terminal and emergent stop signal output end；
Signal transformation circuit, the signal transformation circuit include input terminal and output end, the input terminal of the signal transformation circuit
It is electrically connected with the emergent stop signal input terminal, the signal transformation circuit is used to for self-recovering type emergent stop signal to be shaped as pulse letter
Number, or self-locking emergent stop signal is shaped as step signal；
Pulse control circuit, the pulse control circuit include input terminal and output end；The input terminal of the pulse control circuit
It is electrically connected with the output end of the signal transformation circuit, output end is electrically connected with the emergent stop signal output end；The pulse control
Circuit processed is used for when its input terminal receives pulse signal or step signal, in the pulse letter of its output end output predetermined width
Number.
2. emergency stop control circuit according to claim 1, which is characterized in that the pulse control circuit further include:
Switch module, the first end of the switch module are electrically connected with the input terminal of the pulse control circuit, second end and institute
State the output end electrical connection of pulse control circuit；
Energy-storage module, the energy-storage module include input terminal and output end, the input terminal of the energy-storage module and the pulse control
The input terminal of circuit processed is electrically connected；The energy-storage module is used for when receiving the pulse signal or the step signal, control
The voltage for making its output end is increased to first voltage within a preset time；
Drive module, the drive module include first input end, the second input terminal and output end, and the first of the drive module
Input terminal is electrically connected with the output end of the energy-storage module, and the second input terminal inputs first voltage, output end and the switching molding
The control terminal of block is electrically connected；The drive module is used to drive when the voltage value that its first input end inputs is greater than first voltage
Move the switch module shutdown.
3. emergency stop control circuit according to claim 2, which is characterized in that the energy-storage module includes:
First resistor, the first end of the first resistor are electrically connected with the input terminal of the energy-storage module, second end and the storage
The output end electrical connection of energy module；
Capacitor, the first end of the capacitor are electrically connected with the output end of the energy-storage module, the second end ground connection of the capacitor.
4. emergency stop control circuit according to claim 2, which is characterized in that the drive module includes:
First comparator, the first input end of the first comparator are electrically connected with the first input end of the drive module, the
Two input terminals are electrically connected with the second input terminal of the drive module；
The first transistor, the control terminal of the first transistor are electrically connected with the output end of the first comparator, and described first
The first end of transistor is electrically connected with the output end of the drive module, the second end ground connection of the first transistor；
The first end of second resistance, the second resistance inputs second voltage, the second end of the second resistance and the driving
The output end of module is electrically connected.
5. emergency stop control circuit according to claim 4, which is characterized in that the pulse control circuit further include: third
Resistance；
The first end of the 3rd resistor is electrically connected with the second end of the switch module, the second termination of the 3rd resistor
Ground.
6. emergency stop control circuit according to claim 2, which is characterized in that further include:
Discharge circuit, the discharge circuit include first input end, the second input terminal and output end, and the first of the discharge circuit
Input terminal is electrically connected with the output end of the signal transformation circuit, and the second input terminal inputs tertiary voltage, the discharge circuit
Output end is electrically connected with the output end of the energy-storage module；The discharge circuit is used for after emergent stop signal stopping to the energy storage
Module is discharged.
7. emergency stop control circuit according to claim 6, which is characterized in that the discharge circuit further include:
The first input end of second comparator, second comparator is electrically connected with the first input end of the discharge circuit, the
Two input terminals are electrically connected with the second input terminal of the discharge circuit；
Second transistor, the control terminal of the second transistor are electrically connected with the output end of second comparator, and described second
The first end of transistor is electrically connected with the output end of the discharge circuit, the second end ground connection of the second transistor；
The first end of 4th resistance, the 4th resistance inputs the 4th voltage, the second end and described second of the 4th resistance
The control terminal of transistor is electrically connected.
8. emergency stop control circuit according to claim 1, which is characterized in that the signal transformation circuit further include:
Disappear twitter circuit, and the twitter circuit that disappears includes input terminal and output end, and the input terminal and the signal of the twitter circuit that disappears are whole
The input terminal of shape circuit is electrically connected；
Monostable circuit, the monostable circuit include input terminal and output end, the input terminal of the monostable circuit with it is described
Disappear the output end electrical connection of twitter circuit, and output end is electrically connected with the output end of signal transformation circuit；The monostable circuit is used for
Self-recovering type emergent stop signal is shaped as pulse signal, or self-locking emergent stop signal is shaped as step signal.
9. emergency stop control circuit according to claim 8, which is characterized in that the pulse width of the pulse signal is greater than institute
State the pulse width of the pulse signal of the output end output of pulse control circuit.
10. a kind of RT system of integrated CT characterized by comprising scram button and such as claim 1-9 are described in any item
Emergency stop control circuit；
Wherein, the scram button is electrically connected with the emergent stop signal input terminal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910164207.5A CN109768785B (en) | 2019-03-05 | 2019-03-05 | Scram control circuit and CT integrated RT system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910164207.5A CN109768785B (en) | 2019-03-05 | 2019-03-05 | Scram control circuit and CT integrated RT system |
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| CN109768785B CN109768785B (en) | 2023-06-27 |
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|---|---|---|---|---|
| JPH10107591A (en) * | 1996-09-27 | 1998-04-24 | Oki Electric Ind Co Ltd | Monostable multivibrator and clock duty compensation circuit |
| JP2000151370A (en) * | 1998-11-12 | 2000-05-30 | Yokogawa Electric Corp | Pulse control circuit |
| JP2003110412A (en) * | 2001-10-01 | 2003-04-11 | Fuji Electric Co Ltd | Pulsewidth control circuit, waveform shaping circuit and integrated circuit thereof |
| US20040090258A1 (en) * | 2002-11-07 | 2004-05-13 | Shinsuke Ohnishi | Clock pulse generator |
| US20090033299A1 (en) * | 2005-07-08 | 2009-02-05 | Rohm Co., Ltd. | Step-down type switching regulator, control circuit thereof, and electronic device using the same |
| US20160028311A1 (en) * | 2014-07-28 | 2016-01-28 | Rohm Co., Ltd. | Switching power supply device |
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2019
- 2019-03-05 CN CN201910164207.5A patent/CN109768785B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10107591A (en) * | 1996-09-27 | 1998-04-24 | Oki Electric Ind Co Ltd | Monostable multivibrator and clock duty compensation circuit |
| JP2000151370A (en) * | 1998-11-12 | 2000-05-30 | Yokogawa Electric Corp | Pulse control circuit |
| JP2003110412A (en) * | 2001-10-01 | 2003-04-11 | Fuji Electric Co Ltd | Pulsewidth control circuit, waveform shaping circuit and integrated circuit thereof |
| US20040090258A1 (en) * | 2002-11-07 | 2004-05-13 | Shinsuke Ohnishi | Clock pulse generator |
| US20090033299A1 (en) * | 2005-07-08 | 2009-02-05 | Rohm Co., Ltd. | Step-down type switching regulator, control circuit thereof, and electronic device using the same |
| US20160028311A1 (en) * | 2014-07-28 | 2016-01-28 | Rohm Co., Ltd. | Switching power supply device |
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| Publication number | Publication date |
|---|---|
| CN109768785B (en) | 2023-06-27 |
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