CN204377238U - A kind of high pressure generator master control system - Google Patents
A kind of high pressure generator master control system Download PDFInfo
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- CN204377238U CN204377238U CN201520063429.5U CN201520063429U CN204377238U CN 204377238 U CN204377238 U CN 204377238U CN 201520063429 U CN201520063429 U CN 201520063429U CN 204377238 U CN204377238 U CN 204377238U
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Abstract
The utility model embodiment provides a kind of high pressure generator master control system, comprises CAN central processor circuit and PFC control circuit; Described CAN central processor circuit is communicated with external control stand by CAN, for arranging exposure parameter, and provides the connection sequential of high pressure generator and external x-ray system; Described PFC control circuit provides inverter current waveform to be that sinusoidal wave drive singal controls high pressure generator, this programme adopts CAN can improve transmission speed and stability, regulate based on pulse frequency (PFC), it is sinusoidal wave for exporting inverter current waveform, power-efficient is higher, and system is more stable.
Description
Technical field
The application relates to X-ray machine technology, particularly the high pressure generator master control system of core component in X-ray machine system.
Background technology
High pressure generator, it is the core component of X-ray machine system, the control of traditional high pressure generator adopts the PWM mode based on pulse width modulation, the inverter current waveform exported is the sawtooth waveforms of band duty ratio, power-efficient is low, and communication modes generally adopts RS232, and transmission speed is slow, apart from short, the error rate is high.
Summary of the invention
In view of this, the utility model embodiment provides a kind of high pressure generator master control system, solves the problem, and can improve transmission speed and stability.
The utility model embodiment is achieved in that a kind of high pressure generator master control system, comprising: CAN central processor circuit and PFC control circuit; Described CAN central processor circuit is communicated with external control stand by CAN, for arranging exposure parameter, and provides the connection sequential of high pressure generator and external x-ray system; Described PFC control circuit provides inverter current waveform to be that sinusoidal wave drive singal controls high pressure generator.
Further, described CAN central processor circuit comprises central processing unit, a CAN interface and the 2nd CAN interface, a described CAN interface is connected to interface CPU board, communication is carried out with described interface CPU board, described 2nd CAN interface is connected to external control stand, for the communication between external control stand and central processing unit.
Further, a described CAN interface, also comprise a high-speed CAN transceiver between the 2nd CAN interface and central processing unit, described high-speed CAN transceiver is specially TJA1040.
Further, also comprise two level translators between described high-speed CAN transceiver and described central processing unit, be connected on constrained input pin, described level translator is specially 6N137.
Further, described PFC control circuit also for sampling and the protection of high-voltage feedback signal, also for detection and the protection of MA feedback signal.
Further, described central processing unit is specially single-chip microcomputer C8051F040.
Further, described system also comprises: D/A converting circuit, for arranging heater current and high voltage reference level.
Further, described system also comprises a feedback control system, and for the output voltage of stable high voltage generator, described feedback control system comprises: Voltage Feedback control circuit and Current Feedback Control Circuit, described Voltage Feedback control circuit is outer shroud, and described Current Feedback Control Circuit is inner ring.
Adopt technique scheme, the utility model has following beneficial effect: this programme regulates based on pulse frequency (PFC), and it is sinusoidal wave for exporting inverter current waveform, and power-efficient is higher, and system is more stable.This programme communication modes adopts CAN, and transmission speed is more stable soon, can realize multinode communication simultaneously.Use single-chip microcomputer C8051F040, adopt CANBUS and upper machine communication, compared with the VOC of feedback voltage by setting voltage, realize generator high pressure (KV) PFC closed-loop control.Meanwhile, export control voltage and control tube filament heating, outputs level signals controls bulb anode and rotates, and realizes the control to whole system.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, the other features, objects and advantages of the application will become more obvious:
Fig. 1 shows the structured flowchart of a kind of embodiment of high pressure generator master control system that the application provides;
Fig. 2 shows the circuit diagram of CAN communication interface in another embodiment of high pressure generator master control system that the application provides;
Fig. 3 shows the circuit diagram of D/A converting circuit in another embodiment of high pressure generator master control system that the application provides;
Fig. 4 shows the structure chart of negative-feedback circuit in another embodiment of high pressure generator master control system that the application provides;
Fig. 5 shows the circuit diagram of negative-feedback circuit in another embodiment of high pressure generator master control system that the application provides.
Embodiment
Below in conjunction with drawings and Examples, the application is described in further detail.Be understandable that, specific embodiment described herein is only for explaining related invention, but not the restriction to this invention.It also should be noted that, for convenience of description, in accompanying drawing, illustrate only the part relevant to Invention.
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the application in detail in conjunction with the embodiments.
As shown in Figure 1, a kind of high pressure generator master control system that the utility model embodiment provides, comprising: CAN central processor circuit and PFC control circuit; Described CAN central processor circuit is communicated with external control stand by CAN, for arranging exposure parameter, and provides the connection sequential of high pressure generator and external x-ray system; Described PFC control circuit provides inverter current waveform to be that sinusoidal wave drive singal controls high pressure generator.
Specifically, Can central processor circuit part is the assembly of elements realizing high pressure generator embedded Control function, complete the collection of high pressure generator analog quantity with setting, the functions such as I/O interface, data-storing, CANBUS communicate, state indicates, logic control are provided; The connection sequential of high pressure generator and x-ray system is provided.3.3V ,+5V ,+12V ,-12V three kinds of power supplys are used in CanCpu part.+ 5V is mainly digital circuits section and provides power supply; The simulation part that+12V and-12V is circuit board provides power supply.Power supply is provided by power board, and wherein+5V needs the electric current of 1A, and+12V needs the electric current of 1A, and-12V needs the electric current of 0.5A.MCU selects C8051F040, and C8051F040 is fully-integrated mixed signal SOC (system on a chip) type MCU, have 64 digital I/O pins, an Embedded CAN2.0B controller.
PFC control circuit part is embodied as the original drive singal that inversion plate provides MOSFET; Realize variable frequency control and stable KV exports; Realize sampling and the protection of KV, MA; The sampling of resonance current and protection; The protection that the moment realizing busbar voltage fluctuates widely; The latch and the LED that realize fault message indicate.Also for described PFC control circuit also for sampling and the protection of high-voltage feedback signal, also for detection and the protection of MA feedback signal.
The preferred embodiment that the utility model provides, as shown in Figure 2, described CAN central processor circuit comprises central processing unit, a CAN interface and the 2nd CAN interface, a described CAN interface is connected to interface CPU board, communication is carried out with described interface CPU board, described 2nd CAN interface is connected to external control stand, for the communication between external control stand and central processing unit.A described CAN interface, also comprise a high-speed CAN transceiver between the 2nd CAN interface and central processing unit, described high-speed CAN transceiver is specially TJA1040.Also comprise two level translators between described high-speed CAN transceiver and described central processing unit, be connected on constrained input pin, described level translator is specially 6N137.Specific implementation is as follows, and adopt two CAN interfaces, receive interface CPU board for one, carry out communication with interface CPU board, another receives operating desk, for carrying out communication between operation interface and CPU.TJA1040 is high-speed CAN transceiver.Two 6N137 are for the level conversion between MCU and CAN transceiver TJA1040.
The preferred embodiment that the utility model provides, as shown in Figure 3, on the basis of above-described embodiment, also comprises a D/A converting circuit, for arranging heater current and high voltage reference level.Specific implementation is as follows: select AD5343 as D/A converter, and this chip exports analog voltage after proportional amplifier, respectively as the reference voltage of KV and heater current.The precision of AD5343 is 12bit, the KV setting signal of output and heater current setting signal, and after 2 times of amplifiers are amplified, KV reference signal KV_REF delivers to PFC control section, reference signal FIL1_SET, FIL2_SET two filament sheets respectively of heater current.The tube voltage that KV_REF value 1V is corresponding exports as 20KV; The heater current value that FIL1_SET, FIL2_SET value 1V is corresponding is 1A.
The preferred embodiment that the utility model provides, as shown in Figure 4, in order to make the output voltage automatic stabilisation of high pressure generator, not with the impact of service conditions (input voltage fluctuation, load change) and external interference, certain control model must be adopted, the frequency of power switch pipe is regulated automatically.The control model of switch converters divides closed-loop control and opened loop control two kinds, and the requirement due to precision adopts closed loop feedback to control usually.As shown above, whole feedback control system is divided into two links to the block diagram of feedback control loop: voltage control link and Current Control link, voltage-regulation is as outer shroud, and Current adjustment is as inner ring.In voltage control loop, by setting voltage signal and output voltage feedback signal formula, then regulated by a pi regulator.In current regulator, using the set point of the output of voltage control loop as Current Control link, the value of feedback of resonance current and voltage control link are exported superimposed, after after amplifier scale amplifying as the output signal of whole control model.
Actual feedback control system circuit as shown in Figure 5, the voltage setting signal KV_REF that CPU sends sues for peace (because symbol is contrary after U9A amplifier is reverse with voltage feedback signal KVFBK, real in subtracting each other), regulate to obtain summation integrated signal KVS by PI after summation, centered by U9B, formed a pi regulator here.CURRENT BACK is for being resonance current feedback signal, when high pressure generator normally works, its value is negative, sue for peace with the output signal of U9B, passing ratio converts, obtain the output signal VSET of whole control model at the output of U10B, this output signal as and the comparative level of triangle sawtooth waveforms.
More than describe and be only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art are to be understood that, invention scope involved in the application, be not limited to the technical scheme of the particular combination of above-mentioned technical characteristic, also should be encompassed in when not departing from described inventive concept, other technical scheme of being carried out combination in any by above-mentioned technical characteristic or its equivalent feature and being formed simultaneously.The technical characteristic that such as, disclosed in above-mentioned feature and the application (but being not limited to) has similar functions is replaced mutually and the technical scheme formed.
Claims (8)
1. a high pressure generator master control system, is characterized in that, comprising: CAN central processor circuit and PFC control circuit; Described CAN central processor circuit is communicated with external control stand by CAN, for arranging exposure parameter, and provides the connection sequential of high pressure generator and external x-ray system; Described PFC control circuit provides inverter current waveform to be that sinusoidal wave drive singal controls high pressure generator.
2. high pressure generator master control system according to claim 1, it is characterized in that, described CAN central processor circuit comprises central processing unit, a CAN interface and the 2nd CAN interface, a described CAN interface is connected to interface CPU board, communication is carried out with described interface CPU board, described 2nd CAN interface is connected to external control stand, for the communication between external control stand and central processing unit.
3. high pressure generator master control system according to claim 2, is characterized in that, a described CAN interface, also comprises a high-speed CAN transceiver between the 2nd CAN interface and central processing unit, and described high-speed CAN transceiver is specially TJA1040.
4. high pressure generator master control system according to claim 3, it is characterized in that, also comprise two level translators between described high-speed CAN transceiver and described central processing unit, be connected on constrained input pin, described level translator is specially 6N137.
5. high pressure generator master control system according to claim 1, is characterized in that, described PFC control circuit also for sampling and the protection of high-voltage feedback signal, also for detection and the protection of MA feedback signal.
6., according to the arbitrary described high pressure generator master control system of claim 1 ~ 5, it is characterized in that, described central processing unit is specially single-chip microcomputer C8051F040.
7., according to the arbitrary described high pressure generator master control system of claim 1 ~ 5, it is characterized in that, described system also comprises: D/A converting circuit, for arranging heater current and high voltage reference level.
8. according to the arbitrary described high pressure generator master control system of claim 1 ~ 5, it is characterized in that, described system also comprises a feedback control system, for the output voltage of stable high voltage generator, described feedback control system comprises: Voltage Feedback control circuit and Current Feedback Control Circuit, described Voltage Feedback control circuit is outer shroud, and described Current Feedback Control Circuit is inner ring.
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| CN201520063429.5U CN204377238U (en) | 2015-01-29 | 2015-01-29 | A kind of high pressure generator master control system |
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| CN201520063429.5U CN204377238U (en) | 2015-01-29 | 2015-01-29 | A kind of high pressure generator master control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105072791A (en) * | 2015-08-06 | 2015-11-18 | 南宁一举医疗电子有限公司 | Photographic and prospective control system and method for medical diagnostic x-ray high-frequency and high-voltage generator |
| CN109528220A (en) * | 2018-11-29 | 2019-03-29 | 上海联影医疗科技有限公司 | Adjusting method, device and the computer equipment of CT scan system |
| CN109687755A (en) * | 2019-01-02 | 2019-04-26 | 辽宁道特凯力科技有限公司 | Medical diagnostic X ray high pressure generator frequency conversion kV control system |
| CN109793529A (en) * | 2019-03-21 | 2019-05-24 | 北京医维星科技有限公司 | Medical CT Intelligent monitoring and diagnostic system and method |
| CN110888003A (en) * | 2019-10-29 | 2020-03-17 | 南宁市跃龙科技有限公司 | Remote fault diagnosis system for medical high-voltage generator |
-
2015
- 2015-01-29 CN CN201520063429.5U patent/CN204377238U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105072791A (en) * | 2015-08-06 | 2015-11-18 | 南宁一举医疗电子有限公司 | Photographic and prospective control system and method for medical diagnostic x-ray high-frequency and high-voltage generator |
| CN109528220A (en) * | 2018-11-29 | 2019-03-29 | 上海联影医疗科技有限公司 | Adjusting method, device and the computer equipment of CT scan system |
| CN109687755A (en) * | 2019-01-02 | 2019-04-26 | 辽宁道特凯力科技有限公司 | Medical diagnostic X ray high pressure generator frequency conversion kV control system |
| CN109793529A (en) * | 2019-03-21 | 2019-05-24 | 北京医维星科技有限公司 | Medical CT Intelligent monitoring and diagnostic system and method |
| CN110888003A (en) * | 2019-10-29 | 2020-03-17 | 南宁市跃龙科技有限公司 | Remote fault diagnosis system for medical high-voltage generator |
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