CN110613464A - Dental X-ray machine - Google Patents
Dental X-ray machine Download PDFInfo
- Publication number
- CN110613464A CN110613464A CN201910824096.6A CN201910824096A CN110613464A CN 110613464 A CN110613464 A CN 110613464A CN 201910824096 A CN201910824096 A CN 201910824096A CN 110613464 A CN110613464 A CN 110613464A
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- voltage
- module
- circuit
- power supply
- current
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- 238000001914 filtration Methods 0.000 claims abstract description 20
- 230000002159 abnormal effect Effects 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 18
- 210000000214 mouth Anatomy 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 2
- 101150013553 CD40 gene Proteins 0.000 description 1
- 102100040245 Tumor necrosis factor receptor superfamily member 5 Human genes 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
-
- A61B6/51—
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/10—Power supply arrangements for feeding the X-ray tube
- H05G1/12—Power supply arrangements for feeding the X-ray tube with dc or rectified single-phase ac or double-phase
Abstract
The invention relates to the field of X-ray machines, and discloses a dental X-ray machine which comprises a control module, a power supply inversion module, a high-voltage transformer, a rectification module, a filtering module and an X-ray bulb tube, wherein the power supply inversion module comprises a first power supply output module and a second power supply output module, the first power supply output module is used for providing working voltage for the control module, the second power supply output module is used for providing high-frequency alternating current for the high-voltage transformer, the first power supply output module and the second power supply output module are combined together to reduce the structure of the power supply inversion module, a voltage division circuit of the second power supply output module adopts the transformer to convert an original inversion driving signal into a driving signal for starting the inversion driving circuit, compared with a conventional voltage division circuit, the structure can be simplified, the working stability can be improved, and the inversion driving circuit can generate the alternating current with higher frequency, improve the quality of X-ray.
Description
Technical Field
The invention relates to the field of X-ray machines, in particular to a dental X-ray machine.
Background
During the dental examination, the X-ray emitted by the dental X-ray machine can pass through your oral cavity. Most of the X-rays will be absorbed by dense tissues in the mouth and a small amount will be absorbed by soft tissues in the mouth before the X-rays strike the X-ray film. The X-ray film is thus produced. With the continuous popularization of the application of the high voltage generator in the medical equipment, especially the continuous improvement of the application requirement in the X-ray machine, the working stability of the X-ray machine needs to be improved in order to improve the shooting quality of the X-ray machine and reduce the faults of the X-ray machine. Therefore, there is an urgent need for an X-ray apparatus that can operate stably.
Disclosure of Invention
The invention aims to solve at least one of the technical problems in the prior art and provides a dental X-ray machine which is simple in structure and stable in work.
The invention provides a dental X-ray machine, which comprises a control module, a power supply inversion module, a high-voltage transformer, a rectification module, a filtering module and an X-ray bulb tube, wherein the control module comprises a CPU (central processing unit), and an original inversion signal output circuit and a direct current filament driving circuit which are connected with the CPU, the original inversion signal output circuit is used for providing an original inversion driving signal for the power supply inversion module, and the direct current filament driving circuit is used for providing direct current filament driving voltage for the X-ray bulb tube; the power supply inversion module comprises a first power supply output module and a second power supply output module, the first power supply output module is used for providing working voltage for the control module, the second power supply output module is used for providing high-frequency alternating current for the high-voltage transformer, the rectification module is used for performing voltage-multiplying rectification on current output by the high-voltage transformer, and the filtering module is used for filtering current output by the rectification module and then providing the current for the X-ray bulb tube as a direct-current high-voltage working power supply.
As a further improvement of the above scheme, the second power module includes a voltage dividing circuit and an inverter driving circuit, the voltage dividing circuit converts the original inverter driving signal into a driving signal for starting the inverter driving circuit by using a transformer, and the inverter driving circuit is configured to provide a high-frequency alternating current for the high-voltage transformer.
As a further improvement of the above scheme, the control module includes an inverter current feedback circuit, and the inverter current feedback circuit is configured to sample an inverter voltage of the inverter driving circuit and compare the collected voltage with a preset protection voltage, and generate an error signal to the CPU if the comparison result shows that the inverter current is abnormal.
As a further improvement of the above scheme, the control module includes a resonant current feedback circuit, and the inverter current feedback circuit is configured to sample a resonant voltage of the inverter driving circuit and compare the collected voltage with a preset protection voltage, and generate an error signal to the CPU if the comparison result shows that the inverter current is abnormal.
As a further improvement of the above scheme, the control module includes a positive KV feedback circuit, an input end of the KV feedback circuit is used for accessing the KV + voltage signal fed back by the filtering module, the KV feedback circuit compares the KV + voltage signal with a preset protection voltage, and if the comparison result shows that the inverter current is abnormal, an error signal is generated to the CPU.
As a further improvement of the above scheme, the control module includes a negative MA feedback circuit, an input end of the MA feedback circuit is used for accessing an MA-voltage signal fed back by the filtering module, the MA feedback circuit compares the MA-voltage signal with a preset protection voltage, and if the comparison result shows that the inverter current is abnormal, an error signal is generated and sent to the CPU.
As a further improvement of the above scheme, the control module includes a temperature control protection circuit, and the temperature control protection circuit is configured to receive a temperature signal transmitted from the power supply inverter module, and generate an error signal to the CPU if the temperature signal is abnormal.
As a further improvement of the above scheme, the control module includes a filament current protection circuit, an input end of the filament current protection circuit receives a filament feedback voltage, the filament current protection circuit compares the filament feedback voltage with a preset protection voltage, and if the comparison result shows that the inverter current is abnormal, an error signal is generated and sent to the CPU.
Has the advantages that:
the power supply inversion module comprises a first power supply output module and a second power supply output module, wherein the first power supply output module is used for providing working voltage for the control module, the second power supply output module is used for providing high-frequency alternating current for the high-voltage transformer, the first power supply output module and the second power supply output module are combined together, the structure of the power supply inversion module is reduced, a voltage division circuit of the second power supply output module adopts the transformer to convert an original inversion driving signal into a driving signal for starting the inversion driving circuit, the structure can be simplified and the working stability can be improved compared with a conventional voltage division circuit, the inversion driving circuit can generate higher-frequency alternating current, and the X-ray quality is improved.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a block diagram of a dental X-ray machine according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of an original inverter signal output circuit according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a first power output module according to an embodiment of the invention;
FIG. 4 is a circuit diagram of an inverter driving circuit according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of a voltage divider circuit according to an embodiment of the present invention;
FIG. 6 is a circuit diagram of an inverter current feedback circuit according to an embodiment of the present invention;
FIG. 7 is a circuit diagram of a resonant current feedback circuit according to an embodiment of the present invention;
fig. 8 is a circuit diagram of a positive KV feedback circuit in accordance with an embodiment of the present invention;
FIG. 9 is a circuit diagram of a negative MA feedback circuit in accordance with an embodiment of the present invention;
fig. 10 is a circuit diagram of the temperature control protection circuit 7 and the filament current protection circuit 8 according to the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, a dental X-ray machine comprises a control module 1, a power supply inversion module 2, a high voltage transformer 3, a rectification module 4, a filtering module 5 and an X-ray bulb tube 6, wherein the control module 1 comprises a CPU, and an original inversion signal output circuit and a dc filament driving circuit connected to the CPU, the original inversion signal output circuit is used for providing an original inversion driving signal for the power supply inversion module 2, and the dc filament driving circuit is used for providing a dc filament driving voltage for the X-ray bulb tube 6; the power supply inversion module 2 comprises a first power supply output module and a second power supply output module, the first power supply output module is used for providing working voltage for the control module 1, the second power supply output module is used for providing high-frequency alternating current for the high-voltage transformer 3, the rectification module 4 is used for performing voltage-multiplying rectification on current output by the high-voltage transformer 3, and the filtering module 5 is used for filtering current output by the rectification module 4 and then providing the current for the X-ray bulb tube 6 as a direct-current high-voltage working power supply.
The rectifier module 4 is a rectifier circuit board, if there is a complete original piece, the function of rectification can be completed, but it does not contain other accessories such as a shell, the rectifier circuit board includes a rectifier, the rectifier is a complete product, can be used after buying, and does not need to be processed any more. The filtering module 5 is a filtering circuit board, if a complete element can complete the filtering function, but the filtering module does not contain other accessories such as a shell and the like, the filtering circuit board comprises a filter, and the filter is a complete product and can be used after being bought without any processing.
Referring to the circuit diagram of the first power output module in fig. 3, the power inverter module 2 of this embodiment first rectifies, filters and boosts the external single-phase power 220AC to generate 390V dc, and then steps down the dc to generate +5V, +12V and-12V voltages for the control module 1 and other circuits.
The second power module comprises a voltage division circuit and an inversion driving circuit, the voltage division circuit adopts a transformer to convert the original inversion driving signal into a driving signal for starting the inversion driving circuit, the inversion driving circuit is used for providing high-frequency alternating current for the high-voltage transformer 3, and the input end of the inversion driving circuit is connected with working current which is 390V direct current. Referring to fig. 2, fig. 2 is a circuit diagram of the original inversion signal output circuit, when the dental X-ray machine is enabled for exposure, the DRIVE EN signal is combined with the 74LS74 and the IXDD-614YI chip to generate the original inversion driving signals Driver1 and Driver2 to DRIVE the inversion driving circuit to output high frequency alternating current so that the X-ray machine can work normally to make the X-ray tube 6 work to generate rays. Referring to the circuit diagram of the voltage division circuit in fig. 5 and the circuit diagram of the inverter driving circuit in fig. 4, the original inverter driving signals Driver1 and Driver2 are divided by the voltage divider T1 to generate voltage division signals E5-E12, and the voltage division signals E5-E12 drive the inverter driving circuit to generate high-frequency alternating current. In the embodiment, the first power output module and the second power output module are combined together, the structure of the power inversion module 2 is reduced, the voltage division circuit of the second power output module adopts the transformer to convert the original inversion driving signal into the driving signal for starting the inversion driving circuit, compared with the conventional voltage division circuit, the structure can be simplified, the working stability can be improved, the inversion driving circuit can generate alternating current with higher frequency, and the quality of the X-ray is improved.
Referring to fig. 6, the inverter current feedback circuit of this embodiment samples the inverter voltage of the inverter driving circuit by using a transformer T3 and compares the sampled voltage with a preset protection voltage by using a comparator LM311D, when the sampled voltage is greater than the protection voltage TP25, INV _ OVER changes from low potential 0 to high potential 1, and a latch CD4043BD latches a signal and transmits the signal to the CPU by using an inverter TC4584BP and low potential 0, so as to implement software error reporting protection. Specifically, the CPU of this embodiment is a chip of a C8051F040 type.
Referring to the circuit diagram of the resonant current feedback circuit in this embodiment of fig. 7, the resonant voltage of the inverter driving circuit is sampled by T2 and the sampled voltage is compared with the preset protection voltage, when the sampled voltage is greater than the protection voltage TP21, INV _ OVER changes from low potential 0 to high potential 1, and the latch CD40 4043BD latches a signal and then transfers the signal to C8051F040 by low potential 0 through the inverter TC4584BP to implement software error reporting protection. The resonance current is an important parameter when the inverter works, the size of the resonance current directly reflects the working state of the main loop, if the resonance current is too large, the current flowing through the switching tube is increased, the on-state loss and the switching loss are increased, the safety of the switching tube is endangered, therefore, the resonance current needs to be monitored, and when the resonance current exceeds the allowable range, the working of the main loop is stopped.
Referring to the circuit diagram of the positive KV feedback circuit in this embodiment of fig. 8, an input end of the KV feedback circuit is used for accessing a KV + voltage signal fed back by the filter module 5, KV + sampling is compared with a voltage at a protection point TP27 by an LM311D, KVOVER changes from a low potential 0 to a high potential 1 if the sampling voltage is greater than the voltage at the protection point, and then a signal is latched by a CD4043BD and then transmitted to a C8051F040 by an inverter TC4584BP at the low potential 0 for software error reporting protection. The real-time sampling of positive KV and negative KV is realized through a designed circuit, and the sampling signal is operated through an operational amplifier and a KV setting signal, so that the KV value is monitored in real time, and overvoltage is protected. The KV + and MA-values of the embodiment are obtained by designing a circuit to sample the anode and cathode voltages of the filtering module 5.
Referring to fig. 9, in the circuit diagram of the negative MA feedback circuit of this embodiment, an input end of the MA feedback circuit is configured to receive an MA-voltage signal fed back by the filter module 5, the MA-sample is compared with a voltage at the protection point TP28 through the LM311D, if the sampled voltage is greater than the voltage at the protection point, the MA + OVER is changed from the low potential 0 to the low potential 1, and then the signal is latched through the CD4043BD and then transferred to the C8051F040 through the inverter TC4584BP at the low potential 0 to perform error reporting protection for software.
Referring to the circuit diagram of the temperature control protection circuit 7 and the filament current protection circuit 8 in fig. 10, the control module 1 includes the temperature control protection circuit 7, the temperature control protection circuit 7 is used for receiving the temperature signal transmitted from the power supply inverter module 2, when the temperature control is normal, THSW1 is at a low potential of 0, and TH _ OVER is at a low potential of 0; when the temperature control is abnormally disconnected, the E11 optical coupler is connected, the TH _ OVER signal is changed from low potential 0 to high potential 1, and then the TH _ OVER signal is transmitted to C8051F040 from low potential 0 through the inverter TC4584BP so as to realize software error reporting protection. The input end of the filament current protection circuit 8 receives the filament feedback voltage, the filament current protection circuit 8 compares the filament feedback voltage with a preset protection voltage, and if the comparison result shows that the inverter current is abnormal, an error signal is generated and sent to the CPU. Specifically, when the X-ray machine normally works, FIL _ ON is changed from high potential 1 to low potential 0, the UA723CN chip works, meanwhile, the software sets filament current MA _ REF in a form of preheating filament voltage + stabilizing filament voltage, the stabilizing filament voltage is MA _ REF, and then the set voltage is obtained through the UA723CN chip, namely V _ FIL is MA _ REF; the filament feedback V _ FIL is compared with the reference voltage, and FIL _ FAULT changes from low potential 0 to high potential 1 when the feedback voltage is larger than the reference voltage, and then transfers to C8051F040 with low potential 0 through inverter TC4584BP to realize software error reporting protection.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (8)
1. A dental X-ray machine, comprising: the control system comprises a control module (1), a power supply inversion module (2), a high-voltage transformer (3), a rectification module (4), a filtering module (5) and an X-ray bulb tube (6), wherein the control module (1) comprises a CPU (central processing unit), and an original inversion signal output circuit and a direct current filament driving circuit which are connected with the CPU, the original inversion signal output circuit is used for providing an original inversion driving signal for the power supply inversion module (2), and the direct current filament driving circuit is used for providing direct current filament driving voltage for the X-ray bulb tube (6); the power supply inversion module (2) comprises a first power supply output module and a second power supply output module, the first power supply output module is used for providing working voltage for the control module (1), the second power supply output module is used for providing high-frequency alternating current for the high-voltage transformer (3), the rectification module (4) is used for performing voltage-multiplying rectification on current output by the high-voltage transformer (3), and the filtering module (5) is used for filtering current output by the rectification module (4) and then providing the current to the X-ray bulb tube (6) as a direct-current high-voltage working power supply.
2. The dental X-ray machine of claim 1, wherein: the second power supply module comprises a voltage division circuit and an inversion driving circuit, the voltage division circuit adopts a transformer to convert the original inversion driving signal into a driving signal for starting the inversion driving circuit, and the inversion driving circuit is used for providing high-frequency alternating current for the high-voltage transformer (3).
3. The dental X-ray machine of claim 2, wherein: the control module (1) comprises an inverter current feedback circuit, the inverter current feedback circuit is used for sampling the inverter voltage of the inverter driving circuit and comparing the acquired voltage with the preset protection voltage, and if the comparison result shows that the inverter current is abnormal, an error signal is generated and sent to the CPU.
4. The dental X-ray machine of claim 2, wherein: the control module (1) comprises a resonant current feedback circuit, the inverter current feedback circuit is used for sampling the resonant voltage of the inverter driving circuit and comparing the acquired voltage with a preset protection voltage, and if the comparison result shows that the inverter current is abnormal, an error signal is generated and sent to the CPU.
5. The dental X-ray machine of claim 1, wherein: the control module (1) comprises a positive KV feedback circuit, the input end of the KV feedback circuit is used for being connected with a KV + voltage signal fed back by the filtering module (5), the KV + voltage signal is compared with a preset protection voltage by the KV feedback circuit, and if the comparison result shows that the inverter current is abnormal, an error reporting signal is generated and sent to the CPU.
6. The dental X-ray machine of claim 1, wherein: the control module (1) comprises a negative MA feedback circuit, the input end of the MA feedback circuit is used for being connected with an MA-voltage signal fed back by the filtering module (5), the MA feedback circuit compares the MA-voltage signal with a preset protection voltage, and if the comparison result shows that the inverter current is abnormal, an error signal is generated and sent to the CPU.
7. The dental X-ray machine of claim 1, wherein: the control module (1) comprises a temperature control protection circuit (7), the temperature control protection circuit (7) is used for receiving a temperature signal transmitted by the power supply inversion module (2), and if the temperature signal is abnormal, an error signal is generated and transmitted to the CPU.
8. The dental X-ray machine of claim 1, wherein: the control module (1) comprises a filament current protection circuit (8), the input end of the filament current protection circuit (8) receives filament feedback voltage, the filament current protection circuit (8) compares the filament feedback voltage with preset protection voltage, and if the comparison result shows that the inverter current is abnormal, an error reporting signal is generated and sent to the CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910824096.6A CN110613464A (en) | 2019-09-02 | 2019-09-02 | Dental X-ray machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910824096.6A CN110613464A (en) | 2019-09-02 | 2019-09-02 | Dental X-ray machine |
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| Publication Number | Publication Date |
|---|---|
| CN110613464A true CN110613464A (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910824096.6A Pending CN110613464A (en) | 2019-09-02 | 2019-09-02 | Dental X-ray machine |
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| CN (1) | CN110613464A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116602702A (en) * | 2023-06-05 | 2023-08-18 | 珠海西格医疗设备有限公司 | Dental X-ray machine based on high-frequency direct-current constant-voltage control |
| CN116961380A (en) * | 2023-06-19 | 2023-10-27 | 珠海艾珂斯科技有限公司 | Control circuit and method with high-frequency inverter power supply output for X-ray machine |
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Application publication date: 20191227 |