RF microwave detector and ultraviolet curing equipment

Abstract

The utility model relates to the technical field of industrial semiconductors, and discloses an RF (Radio Frequency) microwave detector and ultraviolet curing equipment, the detector comprises an antenna, a biasing circuit, a voltage reference chip, a threshold voltage setting circuit, a high-pass filter circuit and a microcontroller, the voltage output end of the voltage reference chip is connected with the output end of the antenna through the biasing circuit; the output control end of the voltage reference chip is connected with the reference voltage end of the microcontroller through the threshold voltage setting circuit. The output end of the biasing circuit is connected with the analog-to-digital conversion end of the microcontroller through the high-pass filter circuit. Whether the detected microwave radiation energy exceeds the standard or not is judged through threshold reference voltage set by the threshold voltage setting circuit, so that the health and safety of workers are ensured; meanwhile, the threshold reference voltage can be adjusted through the threshold voltage setting circuit according to different application scenes so as to adapt to various working conditions, and multi-stage RF microwave detection is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial semiconductor technical field, concretely is a kind of RF microwave detector and ultraviolet light curing equipment. BACKGROUND

[0002] Ultraviolet light curing equipment has a wide range of applications in modern industry, which is mainly composed of two key parts: a lamp head (lamp box) for generating ultraviolet light and a controller for controlling the lamp head. The lamp head plays a core role in the operation of the equipment. It generates high-power RF microwave energy through the internal magnetron to provide energy for the ultraviolet lamp, prompting the ultraviolet lamp to emit ultraviolet light, thereby achieving the curing treatment of specific materials. This working principle has some similarity with the household microwave oven in daily life, both of which use microwave energy to achieve specific functions. However, this similarity also brings a high demand for the safe control of microwave energy.

[0003] The lamp head uses the RF microwave energy generated by the magnetron to provide energy for the ultraviolet lamp to excite the generation of ultraviolet light. However, if this high-power microwave energy is not properly controlled during the operation of the equipment, it may pose a potential safety risk. For example, during normal operation of the equipment, the microwave energy should be limited to a specific area inside the lamp head to ensure that it is only used to excite the ultraviolet lamp and does not adversely affect the surrounding environment. However, if there is any damage to the RF shielding structure or housing of the equipment, such as damage to the shielding net, cracks or holes in the housing, or gaps in the installed gaskets, it may lead to microwave radiation leakage. When microwave radiation leakage occurs, workers or maintenance personnel exposed to such excessive microwave radiation may suffer serious health hazards. Microwave radiation can cause a series of adverse reactions in the human body, including neurasthenia, fatigue, headache, memory loss, etc. Long-term exposure to high doses of microwave radiation may even increase the risk of serious diseases such as cancer. In actual industrial production environments, ultraviolet light curing equipment is usually in continuous operation, and workers may work near the equipment for a long time. Therefore, any factor that may cause microwave radiation leakage cannot be ignored, and effective detection and protection measures must be taken to ensure the safety of personnel.

[0004] Therefore, it is a technical problem to be solved to detect microwave radiation in the working environment of ultraviolet light curing equipment to ensure the health and safety of workers. SUMMARY

[0005] The utility model discloses a RF (Radio Frequency, radio frequency) microwave detector, detects the working environment of ultraviolet light curing equipment due to the damage of the radio frequency shielding structure or shell of equipment, and the microwave radiation of leakage is caused, and the detector has the advantages of high precision and high sensitivity, can accurately detect the slight change of microwave radiation level, guarantees production, and ensures the health safety of staff.

[0006] In a first aspect, the utility model discloses an RF microwave detector, applied to ultraviolet light curing equipment, and the RF microwave detector includes: antenna, bias circuit, voltage reference chip, threshold voltage setting circuit, high pass filter circuit and microcontroller, wherein the voltage output end of voltage reference chip is connected with the output end of antenna through bias circuit, and the output control end of voltage reference chip is connected with the reference voltage end of microcontroller through threshold voltage setting circuit, and the output end of bias circuit is connected with the analog-digital conversion end of microcontroller through high pass filter circuit, wherein the antenna is used to detect the microwave radiation generated in ultraviolet light curing equipment in real time, generates microwave radiation analog electric signal, bias circuit is used to divide reference voltage, and the direct current bias voltage of microwave radiation electric signal is outputted, threshold voltage setting circuit is used to divide reference voltage and output threshold reference voltage, high pass filter circuit is used to convert microwave radiation analog electric signal into microwave radiation analog voltage signal, and microcontroller is used to convert microwave radiation analog voltage signal into microwave radiation digital voltage signal, reads and obtains the voltage value of microwave radiation digital voltage signal, compares the voltage value with threshold reference voltage, judges whether the microwave radiation generated in ultraviolet light curing equipment is overproof, if the voltage value of microwave radiation digital voltage signal is less than threshold reference voltage, then determines that the microwave radiation generated in ultraviolet light curing equipment is not overproof, otherwise determines that the microwave radiation generated in ultraviolet light curing equipment is overproof.

[0007] The utility model discloses a patent, when the ultraviolet light curing equipment because radio frequency shielding structure or shell appears damage, leads to microwave radiation leakage, and the antenna passes through the microwave radiation that the working environment of ultraviolet light curing equipment produces to thereby produce microwave radiation analog electric signal, and the amplitude of microwave radiation analog electric signal will become big with the increase of radiation amount. The voltage output end of voltage reference chip is connected with the output end of antenna through the bias circuit, and the bias circuit is used for dividing voltage reference voltage, and the direct current bias voltage of microwave radiation electric signal is output, and the direct current bias voltage is added to microwave radiation electric signal, and the signal can be effectively amplified, and signal distortion is prevented. Therefore even if the slight change of microwave radiation level, can accurately detect the radiant energy, has the advantages of high precision and high sensitivity. The microwave radiation electric signal is transmitted to the microcontroller through the high pass filter circuit again, wherein the high pass filter circuit converts the microwave radiation analog electric signal into microwave radiation analog voltage signal, and then the microcontroller converts the microwave radiation analog voltage signal into microwave radiation digital voltage signal, and reads the voltage value of microwave radiation digital voltage signal. Meanwhile, the output control end of voltage reference chip is connected with the reference voltage end of microcontroller through the threshold voltage setting circuit, and the threshold voltage setting circuit divides the threshold reference voltage of voltage reference voltage. Therefore, the microcontroller compares the voltage value with the threshold reference voltage, judges whether the microwave radiation produced in the ultraviolet light curing equipment is overproof, if the voltage value of microwave radiation digital voltage signal is less than the threshold reference voltage, then it is determined that the microwave radiation produced in the ultraviolet light curing equipment is not overproof, otherwise it is determined that the microwave radiation produced in the ultraviolet light curing equipment is overproof. In the actual application scene, once the microwave radiation energy existing in the working environment of the equipment is detected to exceed the specified index, the power supply of the lamp head can be cut off through the lamp head controller to ensure the health and safety of the staff. In addition, if the equipment needs to be used in different application environments, the value of threshold reference voltage can be adjusted through the threshold voltage setting circuit, so that the equipment can also be used in different application environments, adapt to various working conditions, and multi-stage RF microwave detection can be realized. In addition, the RF microwave detector of the utility model embodiment is simple in design and high in real-time, and the safety of ultraviolet light curing equipment operation is improved.

[0008] In the second aspect, the utility model patent embodiment further provides a kind of ultraviolet light curing equipment, including lamp head and be used to control the lamp head of lamp head controller, and the RF microwave detector of first aspect;Wherein, the RF microwave detector is connected with the lamp head controller by cable, and the cable inside includes communication bus and in-place detection signal, and the lamp head controller is used to determine whether the RF microwave detector is connected according to the in-place detection signal.

[0009] The utility model discloses a structure schematic diagram of RF microwave detector is provided for the utility model embodiment, and the in -position detection signal in the cable is detected, and when the in -position detection signal is high level, then determine that the RF microwave detector is not connected, namely, the RF microwave detector has not realized stable reliable connection between the lamp holder controller of ultraviolet light curing equipment, and if the in -position detection signal is low level, then determine that the RF microwave detector is connected, namely, the RF microwave detector realizes stable reliable connection between the lamp holder controller of ultraviolet light curing equipment. Thus, ensure that the communication state and working condition between the RF microwave detector and lamp holder controller can be detected in real time, accurately during the equipment operation, when confirming that microwave detector has been connected, the lamp holder controller can communicate with the microwave detector through the communication bus in the cable, and the microwave detection result is acquired, and the lamp holder is controlled again through the microwave detection result in reverse, and if the microwave radiation energy that exists in the working environment of equipment is detected and exceeds the index of stipulation, the lamp holder controller cuts off the power supply of the lamp holder, to ensure the health safety of staff. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 A structure schematic diagram of RF microwave detector is provided for the utility model embodiment, and the in -position detection signal in the cable is detected, and when the in -position detection signal is high level, then determine that the RF microwave detector is not connected, namely, the RF microwave detector has not realized stable reliable connection between the lamp holder controller of ultraviolet light curing equipment, and if the in -position detection signal is low level, then determine that the RF microwave detector is connected, namely, the RF microwave detector realizes stable reliable connection between the lamp holder controller of ultraviolet light curing equipment. Thus, ensure that the communication state and working condition between the RF microwave detector and lamp holder controller can be detected in real time, accurately during the equipment operation, when confirming that microwave detector has been connected, the lamp holder controller can communicate with the microwave detector through the communication bus in the cable, and the microwave detection result is acquired, and the lamp holder is controlled again through the microwave detection result in reverse, and if the microwave radiation energy that exists in the working environment of equipment is detected and exceeds the index of stipulation, the lamp holder controller cuts off the power supply of the lamp holder, to ensure the health safety of staff.

[0011] Figure 2 A circuit principle diagram of RF microwave detector is provided for the utility model embodiment, and the in -position detection signal in the cable is detected, and when the in -position detection signal is high level, then determine that the RF microwave detector is not connected, namely, the RF microwave detector has not realized stable reliable connection between the lamp holder controller of ultraviolet light curing equipment, and if the in -position detection signal is low level, then determine that the RF microwave detector is connected, namely, the RF microwave detector realizes stable reliable connection between the lamp holder controller of ultraviolet light curing equipment. Thus, ensure that the communication state and working condition between the RF microwave detector and lamp holder controller can be detected in real time, accurately during the equipment operation, when confirming that microwave detector has been connected, the lamp holder controller can communicate with the microwave detector through the communication bus in the cable, and the microwave detection result is acquired, and the lamp holder is controlled again through the microwave detection result in reverse, and if the microwave radiation energy that exists in the working environment of equipment is detected and exceeds the index of stipulation, the lamp holder controller cuts off the power supply of the lamp holder, to ensure the health safety of staff.

[0012] Figure 3 A structure schematic diagram of ultraviolet light curing equipment is provided for the utility model embodiment, and the in -position detection signal in the cable is detected, and when the in -position detection signal is high level, then determine that the RF microwave detector is not connected, namely, the RF microwave detector has not realized stable reliable connection between the lamp holder controller of ultraviolet light curing equipment, and if the in -position detection signal is low level, then determine that the RF microwave detector is connected, namely, the RF microwave detector realizes stable reliable connection between the lamp holder controller of ultraviolet light curing equipment. Thus, ensure that the communication state and working condition between the RF microwave detector and lamp holder controller can be detected in real time, accurately during the equipment operation, when confirming that microwave detector has been connected, the lamp holder controller can communicate with the microwave detector through the communication bus in the cable, and the microwave detection result is acquired, and the lamp holder is controlled again through the microwave detection result in reverse, and if the microwave radiation energy that exists in the working environment of equipment is detected and exceeds the index of stipulation, the lamp holder controller cuts off the power supply of the lamp holder, to ensure the health safety of staff.

[0013] In the drawing: 1, antenna;2, bias circuit;3, voltage reference chip;4, threshold voltage setting circuit;5, high pass filter circuit;6, lamp holder controller;7, RF microwave detector;8, cable;U1, microcontroller;R1, first resistor;R2, second resistor;R3, third resistor;R4, fourth resistor;R5, potentiometer;L, inductor;C1, first capacitor;C2, second capacitor;C3, third capacitor;C4, fourth capacitor;C5, fifth capacitor;RS232, communication bus;DET, in -position detection signal. DETAILED DESCRIPTION

[0014] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0015] In the description of the present application, it is to be understood that the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0016] As Figure 1 shown, Figure 1 A structure diagram of an RF microwave detector provided by the embodiment of the present application provides an RF microwave detector applied to ultraviolet light curing equipment; the RF microwave detector comprises an antenna 1, a bias circuit 2, a voltage reference chip 3, a threshold voltage setting circuit 4, a high-pass filter circuit 5 and a microcontroller U1.

[0017] The voltage output end of the voltage reference chip 3 is connected with the output end of the antenna 1 through the bias circuit 2; the output control end of the voltage reference chip 3 is connected with the reference voltage end of the microcontroller U1 through the threshold voltage setting circuit 4; the output end of the bias circuit 2 is connected with the analog-to-digital conversion end of the microcontroller U1 through the high-pass filter circuit 5. In the embodiment of the present application, the voltage reference chip 3 can adopt an 8-bit CMOS microcontroller produced by the American Microchip Technology Company with the model number PIC16F687-I / SS.

[0018] The antenna 1 can adopt a self-made metal wire, and the length of the metal wire is just enough to extend out of the shell of the microwave detector. In some possible embodiments, the microwave detector can further include a shell for protection, and the shell is provided with an antenna hole through which the top end of the antenna 1 can pass. The antenna 1 is used for detecting the microwave radiation existing in the working environment of the ultraviolet light curing equipment in real time. In the field, the detection of the microwave radiation level is generally mainly based on the detection of 2.45 GHz microwave. Therefore, in the embodiment of the utility model, the antenna 1 can receive the microwave energy with a center frequency of 2.45 GHz as an example for description. When the ultraviolet light curing equipment is damaged due to the radio frequency shielding structure or the shell, the microwave radiation leaks. Therefore, when the antenna 1 receives the microwave radiation signal, the microwave radiation analog electric signal is generated on the antenna, and the amplitude of the microwave radiation analog electric signal becomes larger with the increase of the radiation amount.

[0019] According to the above, the analog-to-digital conversion end RA4 and the reference voltage end RC3 of the microcontroller U1 receive two signals respectively, as follows:

[0020] The first signal is the microwave radiation analog electric signal detected by the antenna 1, and then the microwave radiation analog electric signal is input into the analog-to-digital conversion end of the microcontroller U1 through the bias circuit 2 and the high-pass filter circuit 5. The high-pass filter circuit 5 converts the microwave radiation analog electric signal into a microwave radiation analog voltage signal. That is, the high-pass filter circuit 5 converts the microwave energy into a voltage signal by collecting the microwave energy, and the voltage is higher with the larger microwave radiation amount. Then, the microcontroller U1 converts the microwave radiation analog voltage signal into a microwave radiation digital voltage signal, and reads the voltage value V of the microwave radiation digital voltage signal. detection .

[0021] It should be noted that, before the microwave radiation analog electric signal is converted into the microwave radiation analog voltage signal, the microwave radiation analog electric signal is connected to the voltage output end of the voltage reference chip 3 through the bias circuit 2. It should be noted that the voltage reference chip is an integrated circuit that can provide stable and accurate voltage output. The voltage value output by the voltage reference chip is used as the reference voltage of other elements or modules in the circuit, and plays an extremely important role in ensuring the normal work, accuracy and stability of the circuit. For example, in the analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuits, the accurate voltage provided by the voltage reference chip is a key factor for conversion accuracy; in the power management circuit, the voltage reference chip can be used to set the standard of the output voltage. In the embodiment of the utility model, the voltage reference chip 3 generates a precise 4.1 V reference voltage V ref , and the reference voltage V refThe voltage divider adds a direct current bias voltage to the microwave radiation analog electric signal of the antenna 1, the signal can be effectively amplified, the signal distortion is prevented, and complete signal waveforms can be received during detection of the subsequent stage, therefore, even slight changes in the microwave radiation level can be accurately detected, and therefore, the RF microwave detector has the advantages of high precision and high sensitivity.

[0022] The second signal is that the threshold voltage setting circuit 4 outputs the reference voltage V ref output by the voltage reference chip 3 from the control end RC3. ref-th The signal is then input to the reference voltage end of the microcontroller U1.

[0023] It should be noted that the threshold reference voltage V ref-th output by the threshold voltage setting circuit 4 is set according to the actual application scene requirement, for example, for detection of the microwave radiation level, the microwave energy power density at 2.45GHz should be less than 8mW / cm 2 , and then, the voltage value corresponding to the energy power density threshold 8mW / cm 2 is converted to serve as the threshold reference voltage V ref-th for microwave detection and judgment in the current environment. ref-th The threshold voltage setting circuit 4 is used for adjustment, and the threshold reference voltage V ref-th output therefrom is the voltage value obtained by the above conversion. ref-th It can be understood that even for microwave detection of the same frequency band, the threshold reference voltage V 2 for microwave detection and judgment will be adjusted according to the field environment, for example, for 2.45GHz microwave detection, the threshold reference voltage V 2 may be adjusted to 0-2mW / cm detection or 0-10mW / cm ref-th . In this way, various working conditions can be adapted to realize multi-stage RF microwave detection.

[0024] As described above, finally, the microcontroller U1 compares the voltage value V detection of the microwave radiation digital voltage signal with the threshold reference voltage V ref-th , and thus, it can be judged whether the microwave radiation existing in the working environment of the ultraviolet curing equipment exceeds the standard.If the current detected microwave radiation energy power density does not reach the specified standard, it indicates that the microwave radiation existing in the working environment of the ultraviolet light curing equipment does not exceed the standard, otherwise it is determined that the microwave radiation existing in the working environment of the ultraviolet light curing equipment exceeds the standard, at this time it indicates that the microwave radiation in the current environment will endanger the health and safety of the human body, therefore, in some possible embodiments, the power supply of the lamp holder is cut off by the lamp holder controller connected with the RF microwave detector, so as to ensure the health and safety of the staff.

[0025] On the basis of the above-mentioned embodiments, in a possible embodiment, the RF microwave detector further comprises a microwave receiving circuit; as shown in Figure 2 Figure 2 A circuit principle diagram of an RF microwave detector provided by the embodiment of the present application, wherein the microwave receiving circuit comprises an inductor L and a first resistor R1, one end of the inductor L is connected with the output end of the antenna 1, the other end of the inductor L is connected with one end of the first resistor R1, and the other end of the first resistor R1 is connected with the bias circuit 2. Wherein, the inductance value of the inductor L is 10uH; the resistance value of the first resistor R1 is 1k, and the resistance value accuracy is 1%.

[0026] In the embodiment of the present application, the inductor L is adjusted to match the frequency of the microwave radiation analog electric signal at the output end of the antenna 1, which is conducive to improving the receiving performance of the microwave radiation analog electric signal, and further improving the detection accuracy, accuracy and sensitivity of the RF microwave detector to microwave radiation.

[0027] On the basis of the above-mentioned embodiments, in a possible embodiment, as shown in Figure 2 The bias circuit 2 specifically comprises a second resistor R2, a third resistor R3 and a first capacitor C1; wherein one end of the second resistor R2 is connected with the voltage output end of the voltage reference chip 3, the other end of the second resistor R2 is respectively connected with the other end of the first resistor R1 and one end of the third resistor R3, the other end of the third resistor R3 is grounded, and the third resistor R3 is connected with the first capacitor C1 in parallel; the other end of the first resistor R1 is connected with the input end of the high-pass filter circuit 5. In the embodiment of the present application, the reference voltage V ref generated by the voltage reference chip 3 is divided by the second resistor R2 and the third resistor R3, and the divided voltage V ref is used as the DC bias voltage of the antenna 1 microwave radiation analog electric signal, so that complete signal waveform can be received during detection. Wherein, the resistance value of the second resistor R2 and the third resistor R3 is 1k, and the resistance value accuracy is 1%. The capacitance value of the first capacitor C1 is 100nF.

[0028] ​On the basis of the above-mentioned embodiments, in a feasible implementation manner, as shown in Figure 2 The high-pass filter circuit 5 includes a fourth resistor R4, a second capacitor C2, a third capacitor C3 and a fourth capacitor C4; one end of the fourth resistor R4 is connected with the other end of the first resistor R1, the other end of the fourth resistor R4 is connected with one end of the fourth capacitor C4, and the other end of the fourth capacitor C4 is grounded; the second capacitor C2 and the fourth resistor R4 are connected in parallel, and the third capacitor C3 is connected with the fourth resistor R4 in parallel; and the other end of the fourth resistor R4 is connected with an analog-to-digital conversion end of the microcontroller U1.

[0029] The fourth resistor R4, the second capacitor C2 and the third capacitor C3 constitute a high-pass filter, which attenuates signals with a frequency lower than 2.45GHz in the received signal, so as to ensure that the received microwave radiation analog electric signal will not be attenuated, thereby ensuring that the microwave detection is not interfered by other environmental factors, and being beneficial to improving the detection precision and accuracy. It should be noted that the embodiments of the utility model are aimed at RF signals, i.e. microwave signals with a frequency range of 3kHz to 300GHz, therefore, the signal frequency attenuated by the high-pass filter can not only be lower than 2.45GHz, but also can be other frequencies, which depends on the actual application scene, and can be realized by adjusting the parameters of the fourth resistor R4, the second capacitor C2 and the third capacitor C3. In the embodiments of the utility model, the resistance value of the fourth resistor R4 is 1k, and the resistance accuracy is 1%. The capacitance value of the second capacitor C2 is 100nF, and the capacitance value of the third capacitor C3 is 100μF.

[0030] After the microwave radiation analog electric signal passes through the above-mentioned high-pass filter, the fourth capacitor C4 is used to collect microwave radiation energy and convert it into a voltage signal, i.e. a microwave radiation analog voltage signal, and the greater the microwave radiation amount is, the higher the voltage converted by the fourth capacitor C4 is. Then, the microwave radiation analog voltage signal is input to the analog-to-digital conversion end RA4 of the microcontroller U1. The microcontroller U1 converts the microwave radiation analog voltage signal into a quantifiable microwave radiation digital voltage signal by using the analog-to-digital conversion function, so as to facilitate the program to read the voltage value V detection of the microwave radiation digital voltage signal. The capacitance value of the fourth capacitor C4 is 10nF, and the capacitance value of the fourth capacitor C4 is relatively small, which is to convert the relatively weak microwave radiation energy signal into a voltage value recognizable by the microcontroller U1, and is beneficial to improving the detection sensitivity of the microwave radiation.

[0031] On the basis of the above-mentioned embodiments, in a feasible implementation manner, as shown in Figure 2As shown, the threshold voltage setting circuit 4 includes a potentiometer R5 and a fifth capacitor C5; wherein one end of the resistor body of the potentiometer R5 is connected with the output control end of the voltage reference chip 3, the other end of the resistor body of the potentiometer R5 is grounded, the adjusting end of the potentiometer R5 is connected with one end of the fifth capacitor C5, the other end of the fifth capacitor C5 is grounded, and the adjusting end of the potentiometer R5 is connected with the reference voltage end of the microcontroller U1. Wherein, the capacitance value of the fifth capacitor (C5) is 100nF, and the potentiometer R5 adopts a multi-turn adjustable potentiometer with a model of 3296W-1-102LF.

[0032] The embodiment of the utility model adjusts the control pin of the potentiometer R5, and can adjust the threshold reference voltage V ref-th to adapt to different application scene demands, is simple to operate, has simple circuit structure and is easy to implement, and is low in cost.

[0033] The embodiment of the utility model further provides a kind of ultraviolet light curing equipment, as shown in Figure 3 , Figure 3 It is the structural diagram of a kind of ultraviolet light curing equipment provided by the embodiment of the utility model, the ultraviolet light curing equipment includes lamp holder and be used to control the lamp holder lamp holder controller 6, and the RF microwave detector 7 described in above embodiment;Wherein, the RF microwave detector 7 is connected with the lamp holder controller 6 by cable 8, the cable 8 inside includes communication bus RS232 and in-position detection signal DET, the lamp holder controller 6 judges whether the RF microwave detector 7 is connected according to the in-position detection signal DET.Due to in-position detection signal DET short-circuit to shell ground at detector interface, when in-position detection signal DET is high level, then determine that the RF microwave detector 7 is not connected, i.e. the RF microwave detector 7 does not realize stable and reliable connection between lamp holder controller 6 of ultraviolet light curing equipment, if in-position detection signal DET is low level, then determine that the RF microwave detector 7 is connected, i.e. the RF microwave detector 7 realizes stable and reliable connection between lamp holder controller 6 of ultraviolet light curing equipment.Such, ensure that the communication state and working state between the RF microwave detector and lamp holder controller can be detected in real time accurately during equipment operation, when confirming that microwave detector has been connected, lamp holder controller can communicate with microwave detector through communication bus in cable, real-time monitoring microwave leakage, obtains microwave detection result, and reversely controls lamp holder by microwave detection result, if the microwave radiation energy existing in the working environment of equipment is detected to exceed the specified index, lamp holder controller cuts off the power supply of lamp holder, to ensure the health and safety of staff.

[0034] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An RF microwave detector, used in ultraviolet curing equipment, characterized in that, The RF microwave detector includes: Antenna (1), bias circuit (2), voltage reference chip (3), threshold voltage setting circuit (4), high-pass filter circuit (5) and microcontroller (U1); The voltage output terminal of the voltage reference chip (3) is connected to the output terminal of the antenna (1) through the bias circuit (2); the output control terminal of the voltage reference chip (3) is connected to the reference voltage terminal of the microcontroller (U1) through the threshold voltage setting circuit (4); and the output terminal of the bias circuit (2) is connected to the analog-to-digital converter terminal of the microcontroller (U1) through the high-pass filter circuit (5). The antenna (1) is used to detect the microwave radiation generated in the ultraviolet curing device in real time and generate a microwave radiation analog electrical signal; the bias circuit (2) is used to convert the reference voltage (V) ref The voltage divider outputs the DC bias voltage of the microwave radiation electrical signal; the threshold voltage setting circuit (4) is used to set the reference voltage (V) to a DC bias voltage. ref Voltage divider output threshold reference voltage (V) ref-th The high-pass filter circuit (5) is used to convert the microwave radiation analog electrical signal into a microwave radiation analog voltage signal; the microcontroller (U1) is used to convert the microwave radiation analog voltage signal into a microwave radiation digital voltage signal, and read the voltage value (V) of the microwave radiation digital voltage signal. detection ), and by comparing the voltage value (V detection ) and the threshold reference voltage (V ref-th ), determine whether the microwave radiation generated in the ultraviolet curing equipment exceeds the standard, if V detection <V ref-th If the microwave radiation generated in the ultraviolet curing equipment is within the standard, then it is determined that the microwave radiation generated in the ultraviolet curing equipment does not exceed the standard; otherwise, it is determined that the microwave radiation generated in the ultraviolet curing equipment exceeds the standard.

2. The RF microwave detector as described in claim 1, characterized in that, It also includes a microwave receiving circuit; wherein the microwave receiving circuit includes an inductor (L) and a first resistor (R1), one end of the inductor (L) is connected to the output terminal of the antenna (1), the other end of the inductor (L) is connected to one end of the first resistor (R1), and the other end of the first resistor (R1) is connected to the bias circuit (2).

3. The RF microwave detector as described in claim 2, characterized in that, The bias circuit (2) includes a second resistor (R2), a third resistor (R3), and a first capacitor (C1). In this circuit, one end of the second resistor (R2) is connected to the voltage output terminal of the voltage reference chip (3), the other end of the second resistor (R2) is connected to the other end of the first resistor (R1) and one end of the third resistor (R3), the other end of the third resistor (R3) is grounded, and the third resistor (R3) is connected in parallel with the first capacitor (C1); the other end of the first resistor (R1) is connected to the input terminal of the high-pass filter circuit (5).

4. The RF microwave detector as described in claim 3, characterized in that, The high-pass filter circuit (5) includes a fourth resistor (R4), a second capacitor (C2), a third capacitor (C3), and a fourth capacitor (C4). Wherein, one end of the four resistors (R4) is connected to the other end of the first resistor (R1), the other end of the four resistors (R4) is connected to one end of the fourth capacitor (C4), and the other end of the fourth capacitor (C4) is grounded; the second capacitor (C2) and the four resistors (R4) are connected in parallel, and the third capacitor (C3) and the four resistors (R4) are connected in parallel; the other end of the four resistors (R4) is connected to the analog-to-digital converter terminal of the microcontroller (U1).

5. The RF microwave detector as described in claim 4, characterized in that, The threshold voltage setting circuit (4) includes a potentiometer (R5) and a fifth capacitor (C5). One end of the potentiometer (R5) resistor is connected to the output control terminal of the voltage reference chip (3), the other end of the potentiometer (R5) resistor is grounded, the adjustment terminal of the potentiometer (R5) is connected to one end of the fifth capacitor (C5), the other end of the fifth capacitor (C5) is grounded, and the adjustment terminal of the potentiometer (R5) is connected to the reference voltage terminal of the microcontroller (U1).

6. The RF microwave detector as described in claim 4, characterized in that, The resistance values ​​of the first resistor (R1), the second resistor (R2), the third resistor (R3), and the fourth resistor (R4) are 1kΩ, and the resistance accuracy is 1%.

7. The RF microwave detector as described in claim 5, characterized in that, The capacitance values ​​of the first capacitor (C1), the second capacitor (C2), and the fifth capacitor (C5) are 100nF, the capacitance value of the third capacitor (C3) is 100μF, and the capacitance value of the fourth capacitor (C4) is 10nF.

8. The RF microwave detector as described in claim 2, characterized in that, The inductance value of the inductor (L) is 10μH.

9. A UV curing device, comprising a lamp head and a lamp head controller (6) for controlling the lamp head, characterized in that, It also includes the RF microwave detector (7) according to any one of claims 1 to 8; wherein the RF microwave detector (7) is connected to the lamp holder controller (6) via a cable (8), the cable (8) containing a communication bus (RS232) and a presence detection signal (DET), and the lamp holder controller (6) is used to determine whether the RF microwave detector (7) is connected based on the presence detection signal (DET).

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