Portable high-power radiation source

Abstract

The invention discloses a portable high-power ray source, which belongs to the technical field of X-rays, and comprises a power supply, an MCU (Microprogrammed Control Unit) control system, an inverter circuit and a high-voltage generator, the power supply comprises a storage battery and a super capacitor bank, and the MCU control system is respectively connected with the storage battery, the super capacitor bank, the inverter circuit and the high-voltage generator. The storage battery and the super capacitor are connected in series to transmit low-voltage large current to the inverter circuit, the inverter circuit converts the received low-voltage large current into high-voltage low current under the control of the MCU control system and transmits the high-voltage low current to the high-voltage generator, and the high-voltage generator outputs high-power X-rays under the control of the MCU control system. The device has higher transmitting power, equipment operation is more stable, and the service life of the storage battery is longer.

Description

Technical Field

[0001] This invention belongs to the field of silicon capacitor technology, and particularly relates to a portable high-power radiation source. Background Technology

[0002] Existing portable X-ray source energy storage structures rely on a single lithium battery or independent capacitor output, lacking additional energy storage units. To prevent a sudden drop in battery voltage during discharge from affecting the stability of X-ray and equipment operation, the maximum discharge current needs to be limited. Alternatively, the independent capacitor output may not meet high power demands, thus limiting high-power X-ray output. This results in X-rays being unable to penetrate high-density or thick materials, and low-energy rays are easily absorbed, potentially causing "ray hardening" and leading to decreased image brightness. To address this issue, traditional power solutions employ a direct connection to a fixed power source. This approach results in large, heavy power supplies that are heavily dependent on location and installation, failing to meet the mobility requirements of complex terrain, scenarios without a fixed power source, or rapid response scenarios, thus lacking portability. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a portable high-power radiation source.

[0004] To achieve the above-mentioned objectives, this invention provides a portable high-power X-ray source, comprising a power supply, an MCU control system, an inverter circuit, and a high-voltage generator. The power supply includes a battery and a supercapacitor bank. The MCU control system is connected to the battery, the supercapacitor bank, the inverter circuit, and the high-voltage generator. The battery and the supercapacitor are connected in series to supply a low-voltage, high-current signal to the inverter circuit. Under the control of the MCU control system, the inverter circuit converts the received low-voltage, high-current signal into a high-voltage, low-current signal and supplies it to the high-voltage generator. Under the control of the MCU control system, the high-voltage generator outputs high-power X-rays.

[0005] Preferably, the supercapacitor bank is composed of several individual low-voltage, high-capacity supercapacitors connected in series, and is configured to charge synchronously when powered by the battery.

[0006] Preferably, the battery is also connected to the supercapacitor bank via a DC-DC boost circuit. The battery provides a specific voltage output to the supercapacitor bank for energy storage via the DC-DC boost circuit, and the rated voltage of the supercapacitor bank is greater than or equal to the specific voltage of the DC-DC boost circuit.

[0007] Preferably, the supercapacitor bank releases energy in the following scenario: when the output voltage of the battery drops due to high current discharge, it replenishes current to maintain the stability of the input voltage of the inverter circuit.

[0008] Preferably, the DC-DC boost circuit includes a boost converter, the boost value of which is determined by the ratio of the nominal voltage of the battery to the input voltage of the inverter circuit, and the switching frequency of the boost converter is ≥100kHz. This improves conversion efficiency and reduces size.

[0009] Preferably, the capacity, equivalent series resistance, and maximum discharge current of the supercapacitor bank satisfy the following relationships: capacity × (specific voltage value - minimum operating voltage) ≥ energy required for a single X-ray exposure; maximum discharge current ≥ instantaneous peak current during X-ray exposure; ESR ≤ (specific voltage value × allowable ripple coefficient) / instantaneous peak current.

[0010] Preferably, the MCU control system is also connected to an LCD screen, which is used to realize human-computer interaction.

[0011] Preferably, the battery also supplies power to the MCU control system and the LCD display screen.

[0012] Preferably, the battery is a lithium battery, which is charged via an adapter when its energy is depleted.

[0013] Compared with existing technologies, the beneficial effects of this invention are: significantly increasing the output power of X-rays and ensuring the brightness of the output images; improving dynamic response: avoiding sudden drops in battery voltage caused by high power output, which can lead to unstable equipment operation; extending battery life: enabling the battery to operate in a stable discharge range and reducing deep discharge; improving safety: lithium batteries have the risk of over-discharge, while supercapacitors have high stability during rapid discharge, reducing the risk of battery thermal runaway; and design flexibility: the output voltage can be flexibly adjusted according to specific loads and equipment characteristics to adapt to different power schemes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the principle of the portable high-power radiation source of the present invention.

[0015] Figure 2 This is a schematic diagram of the power supply section of the present invention. Detailed Implementation

[0016] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0018] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0020] like Figure 1 As shown in the figure, the portable high-power X-ray source provided in this embodiment of the invention includes a power supply, an LCD screen, an MCU control system, an inverter circuit, and a high-voltage generator. The power supply includes a battery and a supercapacitor bank. The battery supplies power to the LCD screen, the MCU control system, and the supercapacitor bank. The MCU control system is connected to the battery, the supercapacitor bank, the inverter circuit, and the high-voltage generator. The battery and supercapacitor are connected in series to supply a low-voltage, high-current signal to the inverter circuit. Under the control of the MCU control system, the inverter circuit converts the received low-voltage, high-current signal into a high-voltage, low-current signal, which is then supplied to the high-voltage generator. The high-voltage generator, under the control of the MCU control system, outputs high-power X-rays.

[0021] Specifically, such as Figure 2 As shown, the power supply consists of a battery (BAT+), a DC-DC boost circuit, a supercapacitor bank, a series switch, and a supercapacitor bank charging switch.

[0022] The battery is connected to the supercapacitor bank via a series switch, and also to the supercapacitor bank via a DC-DC boost circuit and a supercapacitor bank charging switch. The battery provides a specific voltage output to the supercapacitor bank for energy storage via the DC-DC boost circuit. The series switch and the supercapacitor bank charging switch are both controlled by an MCU control system, which controls the specific connection method between the battery and the supercapacitor bank. The battery is a lithium battery, which is charged via an adapter when its energy is depleted.

[0023] The DC-DC boost circuit consists of an SC8703 chip and its peripheral circuitry. The peripheral circuitry primarily comprises power transistors D1-D4, all of which are NMOS transistors. The gate of power transistor D1 is connected to pin HD1 of the SC8703 chip, the gate of power transistor D2 is connected to pin HD2, the gate of power transistor D3 is connected to pin LD1, and the gate of power transistor D4 is connected to pin LD2. The drain of power transistor D1 and the source of power transistor D3 are connected to one end of inductor L1, while the drain of power transistor D2 and the source of power transistor D4 are connected to the other end of inductor L1. The DC-DC boost circuit includes a Boost converter. The boost voltage is determined by the ratio of the battery's nominal voltage to the inverter circuit's input voltage, and the Boost converter's switching frequency is ≥100kHz to improve conversion efficiency and reduce size.

[0024] The series switch includes a power transistor D5, a bipolar transistor D6, and several resistors. Power transistor D5 is a PMOS transistor, with its source connected to the battery, its drain connected to ground GND1, its gate connected to the collector of bipolar transistor D6 through a resistor, its base connected to the TANK_ON signal terminal of the MCU control system through a resistor, and its emitter connected to ground GND.

[0025] The supercapacitor charging switch mainly consists of power transistors D7 and D8 and an optocoupler U. Power transistor D7 is a PMOS transistor, and power transistor D8 is an NMOS transistor. The source of power transistor D7 is connected to the battery BAT+, the drain is connected to the power input VCC, and the gate is connected to the Super_Cap_ON signal terminal of the MCU control system. The source of power transistor D8 is connected to ground GND, the drain is connected to ground GND1, and the gate is connected to pin 4 of the optocoupler. Pin 3 of the optocoupler is connected to the battery BAT+ through a resistor, pin 1 is connected to the voltage input, and pin 3 is connected to the Super_Cap_ON signal terminal of the MCU control system.

[0026] The supercapacitor bank consists of several low-voltage, high-capacity supercapacitors connected in series, configured to charge synchronously when powered by the battery. It also includes a reverse current protection circuit, composed of an LTC4412 chip, a power transistor D9, and several capacitors. The power transistor D9 is a PMOS transistor. The LTC4412's input pin VIN is connected to the VOUT terminal of the DC-DC boost circuit, the SENSE pin is connected to the positive terminal of the supercapacitor bank, the GATE pin is connected to the gate of the power transistor D9, the source of the power transistor D9 is connected to the positive terminal of the supercapacitor bank, and the drain of the power transistor D9 is connected to the VOUT terminal of the DC-DC boost circuit. The rated voltage of the supercapacitor bank is greater than or equal to the specific voltage of the DC-DC boost circuit. The supercapacitor bank releases energy in the following scenarios: when the battery output voltage drops due to high current discharge, it replenishes current to maintain the stability of the inverter circuit's input voltage. The capacitance, equivalent series resistance, and maximum discharge current of a supercapacitor bank satisfy the following relationships: Capacity × (specific voltage value - minimum operating voltage) ≥ energy required for a single X-ray exposure; maximum discharge current ≥ instantaneous peak current during X-ray exposure; ESR ≤ (specific voltage value × allowable ripple coefficient) / instantaneous peak current.

[0027] In this embodiment, the battery is selected with a nominal voltage of 14.8V and a discharge rate performance of ≥75A. The supercapacitor combination is selected as a 3V*9=27V combination with a capacity of ≥120F and a maximum peak current of ≥75A. The boost circuit adopts an ultra-wide voltage DC-DC boost circuit with an input voltage range of 2.7V-29V and an output voltage range of 2.5-29V, which meets the current charging requirements of the supercapacitor combination.

[0028] The working principle is as follows:

[0029] During initialization, the MCU control system controls the battery output through a combination of circuits including MOSFETs and optocouplers. When a signal detects that the supercapacitor voltage does not meet the requirements, the series connection between the battery and the supercapacitor is disconnected, and the supercapacitor charging switch is turned on. The battery, DC-DC boost circuit, and supercapacitor are then in a common-ground state, and the battery charges the supercapacitor through the DC-DC boost circuit. Based on signal judgment, when the supercapacitor voltage approaches the 27V rated voltage, the supercapacitor charging switch is turned off, and the DC-DC boost circuit disables. The series connection between the battery and the supercapacitor is then reopened. At this point, the positive terminal of the battery and the negative terminal of the supercapacitor are at the same potential, and their voltages are added together. The voltage at the positive terminal of the supercapacitor is approximately 14.8V + 27V = 42.5V, which meets the operating voltage requirements of the inverter circuit.

[0030] The operator sends exposure signals through the LCD screen human-machine interaction. The MCU control system receives the signals and controls the high voltage generator to work. The instantaneous high power output causes the battery and supercapacitor voltage to drop continuously. Since the supercapacitor group bears most of the power output, the battery voltage is still within the normal range when it drops, and the other circuit systems powered by the battery work normally.

[0031] After a single exposure, the high-voltage generator enters a cooling state, the cooling time of which varies depending on the equipment and the environment. Batteries, with their larger capacity, recover their voltage to its depleted level within milliseconds. Supercapacitors, with their smaller capacity, experience voltage drops to a non-operating state, which is detected by the MCU control system as insufficient for the next operation, prompting them to re-enter the initialization process.

[0032] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A portable high-power ray source comprising a power supply, an MCU control system, an inverter circuit and a high-voltage generator, characterized in that, The power supply includes a battery and a super capacitor group, the MCU control system is connected with the battery, the super capacitor group, an inverter circuit and a high-voltage generator respectively, the battery and the super capacitor are connected in series to deliver low-voltage and large-current to the inverter circuit, the inverter circuit converts the received low-voltage and large-current into high-voltage and low-current under the control of the MCU control system and delivers the high-voltage and low-current to the high-voltage generator, and the high-voltage generator outputs high-power X-rays under the control of the MCU control system.

2. A portable high power radiation source according to claim 1, wherein, The super capacitor group is composed of a plurality of single low-voltage and large-capacity super capacitors connected in series, and the super capacitor group is configured to be charged synchronously when the battery is powered.

3. A portable high power radiation source according to claim 2, wherein, The battery is also connected with the super capacitor group through a DC-DC boost circuit, the battery provides a specific voltage output to the super capacitor group through the DC-DC boost circuit for energy storage, and the rated voltage of the super capacitor group is greater than or equal to the specific voltage of the DC-DC boost circuit.

4. A portable high power radiation source according to claim 1 or 2 or 3, wherein, The super capacitor group releases energy in the following scenarios: when the output voltage of the battery decreases due to large-current discharge, the super capacitor group supplies current to maintain the input voltage of the inverter circuit stable.

5. A portable high power radiation source according to claim 3, wherein, The DC-DC boost circuit includes a Boost converter, the boost value of the DC-DC boost circuit is determined by the ratio of the nominal voltage of the battery to the input voltage value of the inverter circuit, and the switching frequency of the Boost converter is greater than or equal to 100 kHz.

6. A portable high power radiation source according to claim 1 or 2 or 3, wherein, The capacity, equivalent series resistance and maximum discharge current of the super capacitor group satisfy the following relationships: capacity x (specific voltage value - minimum working voltage) ≥ energy required for single X-ray exposure; maximum discharge current ≥ instantaneous peak current during X-ray exposure; ESR ≤ (specific voltage value x allowable ripple coefficient) / instantaneous peak current.

7. A portable high power radiation source according to claim 1 or 2 or 3, wherein, The MCU control system is also connected with an LCD screen, and the LCD screen is used for human-computer interaction.

8. A portable high power radiation source according to claim 7, wherein, The battery also powers the MCU control system and the LCD screen respectively.

9. A portable high power radiation source according to claim 1 or 2 or 3, wherein, The battery is a lithium battery, and the lithium battery is charged through an adapter when the energy is depleted.

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