CN209882191U - Quick discharge device of dental high-frequency X-ray machine - Google Patents
Quick discharge device of dental high-frequency X-ray machine Download PDFInfo
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- CN209882191U CN209882191U CN201920428979.0U CN201920428979U CN209882191U CN 209882191 U CN209882191 U CN 209882191U CN 201920428979 U CN201920428979 U CN 201920428979U CN 209882191 U CN209882191 U CN 209882191U
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Abstract
The utility model provides a quick discharge device of dentistry high frequency X-ray production apparatus, including filter rectifier circuit module, inverter circuit module, filament drive module, auxiliary power source module and CPU circuit module, filament drive module still is connected with outage detection circuitry module, and this outage detection circuitry module includes diode D1, electric capacity C1, resistance R1, photoelectric coupler P1 and resistance R2, and diode D1's negative pole inserts pin 1 of electric capacity C1; the pin 1 of the capacitor C1 is also connected to the pin 1 of the photoelectric coupler P1 after passing through the resistor R1; a VL network mark of the photoelectric coupler P1 is connected to a CPU pin 7 as a voltage power-off detection point; under the standby condition, the filament driving module does not work, when a CPU pin 7 in the CPU circuit module detects a high level, the filament driving module is turned on to drive, the voltage continuously drops until the power supply of the auxiliary power supply module does not work to the continuous discharge current of the voltage + HV of the large electrolytic capacitor C2 and the capacitor C3, and the rapid shutdown is realized after the power failure.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a dentistry high frequency X-ray machine especially relates to dentistry high frequency X-ray machine's quick discharge device.
[ background of the invention ]
Dental hospitals and clinics are places integrating examination, diagnosis and treatment, a dental X-ray machine is often required to be used in many oral treatment operations, and the dental X-ray machine plays an increasingly important role in the diagnosis and treatment process of dental diseases.
The existing dental high-frequency X-ray machine generates high voltage, which is converted into direct current after being filtered and rectified by input network voltage, and then the direct current is divided into three paths to respectively provide circuit electric energy with different functions: one circuit is an inverter circuit module, and a tube voltage circuit of the X-ray tube of about 70 kilovolts is obtained by voltage doubling and rectification of high-voltage and high-frequency voltage generated by the inverter circuit module; one path is a filament driving module which generates low voltage and provides cathode voltage of an X-ray tube, namely filament voltage; one path is an auxiliary power supply module which generates +12V and 5V low-voltage power supplies for the work of a CPU circuit, a driving circuit and the like.
Because the rated power of the dental high-frequency X-ray machine is about 900VA, the direct-current voltage fluctuation before inversion is small for maintaining, the filter capacitor is often large, the total capacity is close to 1000uF, when the equipment is in a standby state, only the auxiliary power supply module works, the power consumption is very small, about 1-2 VA, and when the equipment is powered off, the auxiliary power supply does not work when the capacitor voltage needs to be reduced to about 70V. After a dental high-frequency X-ray machine in the market is powered off, the dental high-frequency X-ray machine is basically discharged only by the power consumption of an auxiliary power supply, and the dental high-frequency X-ray machine can be powered off only by maintaining the device for more than 10 seconds, so that great inconvenience is brought to the long-time power off; firstly, when the personnel in the factory debug the test circuit board, the circuit board can be disassembled for the next test after discharging for a long time, and the efficiency is low; secondly, when the user needs to restart the machine during use, the waiting time is too long, and the experience is poor.
[ Utility model ] content
The utility model discloses effectively solve the inconvenience that long-time discharge brought, provide a can realize quick outage, quick automatic discharge's dentistry high frequency X-ray production apparatus's quick discharge device.
In order to realize the purpose of the utility model, the utility model discloses a technical scheme be:
the rapid discharge device of the dental high-frequency X-ray machine comprises a filter rectification circuit module, an inverter circuit module, a filament driving module, an auxiliary power supply module and a CPU circuit module, wherein 220V input network power is subjected to voltage filter rectification to form direct current, the inverter circuit module is connected with the direct current, the filament driving module is connected with the direct current, the auxiliary power supply module is connected with the direct current, the inverter circuit module generates high-voltage and high-frequency voltage, and the high-voltage and high-frequency voltage is subjected to voltage doubling rectification to obtain a 70 kV tube voltage circuit of an X-ray tube in the dental high-frequency X-ray machine, the filament driving module provides low voltage of an X-ray tube cathode in the dental high-frequency X-ray machine, and the auxiliary power;
the filament driving module is also connected with a power-off detection circuit module which discharges by using the filament driving module, and the power-off detection circuit module comprises a diode D1, a capacitor C1, a resistor R1, a photoelectric coupler P1 and a resistor R2;
the anode of the diode D1 is connected with the L line of the 220V input network power, the cathode of the diode D1 is connected to the pin 1 of the capacitor C1, and the pin 2 of the capacitor C1 is connected to AGND;
the pin 1 of the capacitor C1 is also connected to the pin 1 of the photoelectric coupler P1 after being limited by the resistor R1;
pin 3 of the photoelectric coupler P1 is connected with secondary GND, and pin 4 of the photoelectric coupler P1 is connected with pin 1 of resistor R2;
the VL network mark of the photoelectric coupler P1 is used as a voltage power-off detection point and is connected to a CPU pin 7 in a CPU circuit module;
the circuit between the filter rectifying circuit module and the filament driving module is also connected with a large electrolytic capacitor C2 and a capacitor C3 in parallel;
when the power is off, the voltage at the two ends of the capacitor C1 is instantly pulled down by the load of the resistor R1 and the photoelectric coupler P1 and is close to 0, no current flows through the pin 1 and the pin 2 on the photoelectric coupler P1, and the voltage of the pin 4 on the photoelectric coupler P1 is changed from 0V to 5V;
under the standby condition, the drive circuit of filament drive module does not work, when CPU pin 7 in the CPU circuit module detects the high level, turn on filament drive module drive work, increase the continuous discharge current to the voltage + HV of big electrolytic capacitor C2 and electric capacity C3, the voltage lasts and descends, until the auxiliary power supply of auxiliary power supply module is out of work, because the drive circuit consumption of filament drive module is at 10VA, compare standby power consumption 1 ~ 2VA, the speed of discharge can improve and be close to 10 times, this discharge process only needs 2-3 seconds time, the latency has been reduced greatly, the production efficiency is improved, play the quick shutdown after the outage.
Further, in the circuit of the power failure detection circuit module, the diode D1 and the capacitor C1 form a half-wave rectification circuit.
Further, the photoelectric coupler P1 adopts a PC817 chip.
Further, pin 1 of the photocoupler P1 is the negative pole of the power-off voltage.
Further, pin 2 of the resistor R2 is connected to +5V of the auxiliary power supply module.
The utility model has the advantages that:
the utility model discloses add outage detection circuitry module in original circuit, utilize the X-ray tube filament of dentistry high frequency X-ray production machine to discharge when the load, shortened outage back shutdown time greatly, solved the inconvenience that long-time discharge brought, realize the automatic quick discharge function after the outage, improved production efficiency, the cost is reduced also reduces the trouble that the user need restart equipment and bring.
The filament driving module is used for discharging by adding the power-off detection circuit module electrically connected with the filament driving module, and due to the fact that the filament driving module adopts the output parameters of the original filament driving module to carry out normal preheating work, adverse effects on the original circuit and the X-ray tube cannot be caused.
In the circuit of the power failure detection circuit module, the diode D1 and the capacitor C1 form a half-wave rectification circuit, when the power failure occurs, the voltage at two ends of the capacitor C1 is instantly pulled down by the load of the resistor R1 and the photoelectric coupler P1 and approaches 0, no current flows through the pin 1 and the pin 2 on the photoelectric coupler P1, and the voltage at the pin 4 on the photoelectric coupler P1 is changed from 0V to 5V.
Under the standby condition, the drive circuit of filament drive module does not work, when CPU pin 7 in the CPU circuit module detects the high level, open filament drive module drive work, increase the continuous discharge current to big electrolytic capacitor C2 and electric capacity C3's voltage + HV, the voltage lasts the decline, it is out of work to reach auxiliary power supply of auxiliary power module, because filament drive module's drive circuit consumption is at 10VA, compare standby power consumption 1 ~ 2VA, the speed of discharge can improve and be close to 10 times, this discharge process only needs 2 ~ 3 seconds time, the latency has been reduced greatly, the production efficiency is improved, play the quick shutdown after the outage.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a main circuit in the dental X-ray machine of the present invention;
FIG. 2 is an enlarged schematic view of the breakpoint detection circuit module of the present invention;
fig. 3 is an enlarged schematic diagram of the inverter circuit module according to the present invention;
fig. 4 is an enlarged schematic view of an auxiliary power supply module according to the present invention;
the following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
[ detailed description ] embodiments
A rapid discharge device of a dental high-frequency X-ray machine, as shown in fig. 1 to 4, comprising a filter rectification circuit module 1 for performing voltage filter rectification on 220V input network power to form direct current, an inverter circuit module 2 connected with the direct current, a filament driving module 3 connected with the direct current, an auxiliary power supply module 4 connected with the direct current and a CPU circuit module 5, wherein the inverter circuit module 2 generates high-voltage and high-frequency voltage and is subjected to voltage doubling rectification to obtain a 70 KV tube voltage circuit of an X-ray tube in the dental high-frequency X-ray machine, the filament driving module 3 provides low voltage of a cathode of the X-ray tube in the dental high-frequency X-ray machine, and the auxiliary power supply module 4 provides low-voltage power supplies of +12V and 5V required by the CPU circuit module 5 and the driving circuit; the filament driving module 3 is further connected with a power-off detection circuit module 6 which discharges by using the filament driving module 3, wherein the power-off detection circuit module 6 comprises a diode D1, a capacitor C1, a resistor R1, a photoelectric coupler P1 and a resistor R2, and the photoelectric coupler P1 adopts a PC817 chip.
As shown in fig. 1 and 2, the anode of the diode D1 is connected to the L line of the 220V input network, the cathode of the diode D1 is connected to pin 1 of the capacitor C1, and pin 2 of the capacitor C1 is connected to AGND; pin 1 of the capacitor C1 is also connected to pin 1 of the photoelectric coupler P1 after being limited by the resistor R1, and pin 1 of the photoelectric coupler P1 is the negative pole of the power-off voltage; pin 3 of the photoelectric coupler P1 is connected with secondary GND, pin 4 of the photoelectric coupler P1 is connected with pin 1 of the resistor R2, and pin 2 of the resistor R2 is connected with +5V of the auxiliary power supply module; a VL network mark of the photoelectric coupler P1 is used as a voltage power-off detection point and is connected to a CPU pin 7 in the CPU circuit module 5; a large electrolytic capacitor C2 and a capacitor C3 are connected in parallel to a circuit between the filter rectification circuit module 1 and the filament driving module 3; in the circuit of the power failure detection circuit module 6, the diode D1 and the capacitor C1 form a half-wave rectifier circuit.
As shown in fig. 1 to 4, when the power is off, the voltage across the capacitor C1 is instantaneously pulled down by the load of the resistor R1 and the photocoupler P1 and approaches to 0, no current flows through the pin 1 and the pin 2 of the photocoupler P1, and the voltage of the pin 4 of the photocoupler P1 changes from 0V to 5V.
As shown in fig. 1 to 4, in a standby state, the driving circuit of the filament driving module 3 does not operate, and when the CPU pin 7 in the CPU circuit module 5 detects a high level, the filament driving module 3 is turned on to drive, so that the continuous discharge current of the voltage + HV to the large electrolytic capacitor C2 and the capacitor C3 is increased, and the voltage continuously decreases until the auxiliary power supply of the auxiliary power supply module 4 does not operate, thereby achieving a rapid shutdown after power failure.
The X-ray tube filament of the dental high-frequency X-ray machine is used as a load to discharge, the power consumption of a driving circuit of the filament driving module 3 is 10VA, compared with the standby power consumption of 1-2 VA, the discharge speed can be increased by nearly 10 times, the discharge process only needs 2-3 seconds, the shutdown time after power failure is greatly shortened, the inconvenience caused by long-time discharge is solved, the automatic quick discharge function after power failure is realized, the waiting time is greatly reduced, the production efficiency is improved, the cost is reduced, and the trouble caused by restarting equipment by a user is also reduced. In addition, the normal preheating operation is carried out by adopting the output parameters of the original filament driving module 3, so that the adverse effect on the original circuit and the X-ray tube is avoided.
The above-mentioned embodiments are only preferred embodiments of the present invention, not limiting the scope of the present invention, and all equivalent changes made by the shape, structure and principle of the present invention should be covered by the protection scope of the present invention.
Claims (5)
1. The rapid discharge device of the dental high-frequency X-ray machine comprises a filter rectification circuit module, an inverter circuit module, a filament driving module, an auxiliary power supply module and a CPU circuit module, wherein 220V input network power is subjected to voltage filter rectification to form direct current, the inverter circuit module is connected with the direct current, the filament driving module is connected with the direct current, the auxiliary power supply module is connected with the direct current, the inverter circuit module generates high-voltage and high-frequency voltage, and the high-voltage and high-frequency voltage is subjected to voltage doubling rectification to obtain a 70 kV tube voltage circuit of an X-ray tube in the dental high-frequency X-ray machine, the filament driving module provides low voltage of an X-ray tube cathode in the dental high-frequency X-ray machine, and the auxiliary power; the method is characterized in that:
the filament driving module is also connected with a power-off detection circuit module which discharges by using the filament driving module, and the power-off detection circuit module comprises a diode D1, a capacitor C1, a resistor R1, a photoelectric coupler P1 and a resistor R2;
the anode of the diode D1 is connected with the L line of the 220V input network power, the cathode of the diode D1 is connected to the pin 1 of the capacitor C1, and the pin 2 of the capacitor C1 is connected to AGND;
the pin 1 of the capacitor C1 is also connected to the pin 1 of the photoelectric coupler P1 after being limited by the resistor R1;
pin 3 of the photoelectric coupler P1 is connected with secondary GND, and pin 4 of the photoelectric coupler P1 is connected with pin 1 of resistor R2;
the VL network mark of the photoelectric coupler P1 is used as a voltage power-off detection point and is connected to a CPU pin 7 in a CPU circuit module;
the circuit between the filter rectifying circuit module and the filament driving module is also connected with a large electrolytic capacitor C2 and a capacitor C3 in parallel;
when the power is off, the voltage at the two ends of the capacitor C1 is instantly pulled down by the load of the resistor R1 and the photoelectric coupler P1 and is close to 0, no current flows through the pin 1 and the pin 2 on the photoelectric coupler P1, and the voltage of the pin 4 on the photoelectric coupler P1 is changed from 0V to 5V;
under the standby condition, the drive circuit of the filament drive module does not work, when a CPU pin 7 in the CPU circuit module detects a high level, the filament drive module is turned on to drive and work, the continuous discharge current of the voltage + HV of the large electrolytic capacitor C2 and the capacitor C3 is increased, the voltage continuously drops until the auxiliary power supply of the auxiliary power supply module does not work, and the rapid shutdown is performed after the power failure.
2. The fast discharge device for dental high-frequency X-ray machine according to claim 1, wherein the diode D1 and the capacitor C1 constitute a half-wave rectifier circuit in the circuit of the power failure detection circuit module.
3. The fast discharge apparatus for dental high-frequency X-ray machine according to claim 1, wherein said photo-coupler P1 is a PC817 chip.
4. The fast discharge apparatus for dental high-frequency X-ray machine according to claim 1, wherein pin 1 of the photocoupler P1 is a negative pole of the power-off voltage.
5. The fast discharge apparatus for dental high-frequency X-ray machine according to claim 1, wherein pin 2 of the resistor R2 is connected to +5V of the auxiliary power supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920428979.0U CN209882191U (en) | 2019-03-29 | 2019-03-29 | Quick discharge device of dental high-frequency X-ray machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920428979.0U CN209882191U (en) | 2019-03-29 | 2019-03-29 | Quick discharge device of dental high-frequency X-ray machine |
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| CN209882191U true CN209882191U (en) | 2019-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109819572A (en) * | 2019-03-29 | 2019-05-28 | 珠海西格医疗设备有限公司 | The Quick discharger of dentistry high-frequency X-ray |
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- 2019-03-29 CN CN201920428979.0U patent/CN209882191U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109819572A (en) * | 2019-03-29 | 2019-05-28 | 珠海西格医疗设备有限公司 | The Quick discharger of dentistry high-frequency X-ray |
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