A spatial rod different working frequency high voltage detection feedback circuit, device and method

Abstract

The application discloses a space rod different working frequency high voltage detection feedback circuit, device and method, and relates to the technical field of space rod high voltage detection feedback. The space rod different working frequency high voltage detection feedback circuit comprises a high voltage module, an operational amplifier chip, a main control chip, a power module, a collection chip and an ADC module; the high voltage module is connected with the power module and the collection chip; the operational amplifier chip is connected with the collection chip and the ADC module; the main control chip is connected with the power module and the ADC module; and the collection chip is connected with the ADC module. The application can reduce the difference of the collected high voltage values under different frequencies.

Description

Technical Field

[0001] The present invention relates to the technical field of static elimination, and in particular to a high-voltage detection feedback circuit, device and method for different operating frequencies of a space rod. Background Art

[0002] The SSE Space Rod is a device suspended from the ceiling of a work environment to eliminate static electricity generated by objects in space. In practice, factors such as different customers, application scenarios, and product production can lead to different installation heights for the SSE Space Rod. This height difference causes the time it takes for the positive and negative ions generated by the needle tip to reach the surface of charged objects to vary. To optimize static elimination, the operating frequency of the SSE Space Rod is adjusted based on the installation height. A lower frequency increases the distance at which static electricity can be eliminated.

[0003] For example, the current SSE space rod operating frequency is 0.1 Hz, which means that after the positive high voltage is working, it stops at the negative high voltage for a cycle of 10 seconds (positive high voltage stops after 5 seconds, negative high voltage stops after 5 seconds, and so on); when the SSE space rod operating frequency is 1 Hz, it stops at the negative high voltage for a cycle of 1 second (positive high voltage stops after 0.5 seconds, negative high voltage stops after 0.5 seconds, and so on); the operating time varies at different frequencies. When the ADC is used, for example, the positive high voltage changes with the frequency. At 0.1 Hz, there is high voltage for 5 seconds and no high voltage for 5 seconds, and at 0.1 Hz, it becomes high voltage for 0.5 seconds and no high voltage for 0.5 seconds. As the operating frequency changes, the high voltage sampling becomes very stable, resulting in large differences in the high voltage values ​​collected at different frequencies.

[0004] Therefore, it is urgent to propose a high-voltage detection feedback circuit, device and method for different operating frequencies of a space rod to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-voltage detection feedback circuit, device and method for different operating frequencies of a space rod, which can reduce the difference in high-voltage values ​​collected at different frequencies.

[0006] In order to solve the above technical problems, the present invention provides a high-voltage detection feedback circuit for different operating frequencies of a space rod, comprising: a high-voltage module, an operational amplifier chip, a main control chip, a power module, an acquisition chip and an ADC module;

[0007] The high-voltage module is connected to the power module and the acquisition chip;

[0008] The operational amplifier chip is connected to the acquisition chip and the ADC module;

[0009] The main control chip is connected to the power module and the ADC module;

[0010] The acquisition chip is connected to the ADC module.

[0011] Furthermore, the high voltage module includes: a positive high voltage circuit and a negative high voltage circuit;

[0012] The positive high-voltage circuit includes: capacitor C96, resistor R124, chip U26, capacitor C91, capacitor C92, resistor R122, resistor R123, resistor R128, resistor R129, capacitor C94, diode D16, inductor L6, polarized capacitor C97 and capacitor C95;

[0013] One end of the capacitor C96 is connected to the power module, and the other end is grounded; one end of the resistor R124 is connected to the pin RT / SYNC of the chip U26, and the other end is grounded; one end of the capacitor C91 is connected to the pin SS of the chip U26, and the other end is grounded; one end of the capacitor C92 is connected to the pin BOOT of the chip U26, and the other end is connected to the pin SW of the chip U26, the cathode of the diode D16 and the inductor L6; the anode of the diode D16 is grounded; the end of the inductor L6 away from the capacitor C92 is connected to the polarized capacitor C97, the capacitor C95 and the resistor R129, and is connected to the VCCNP1 pin through the VCCNP1 pin. The positive high-voltage acquisition chip in the acquisition chip is connected; the ends of the polarized capacitor C97 and the capacitor C95 away from the inductor L6 are both grounded; one end of the resistor R122 is connected to the pin FB of the chip U26 and the resistor R123, and the other end is grounded; the end of the resistor R123 away from the resistor R122 is connected to the resistor R128 and the capacitor C94; the ends of the resistor R128 and the capacitor C94 away from the resistor R123 are connected to the end of the resistor R129 away from the inductor L6; the pins VIN and EN of the chip U26 are both connected to the power supply voltage in the power module, and the pins EP and GND are both grounded;

[0014] The negative high voltage circuit is connected to the negative high voltage acquisition chip in the acquisition chip through the pin VCCNP2.

[0015] Furthermore, the negative high-voltage circuit includes: capacitor C102, resistor R132, chip U27, capacitor C98, capacitor C99, resistor R130, resistor R131, resistor R133, resistor R134, capacitor C100, diode D17, inductor L7, polarized capacitor C103 and capacitor C101;

[0016] One end of the capacitor C102 is connected to the power module, and the other end is grounded; one end of the resistor R132 is connected to the pin RT / SYNC of the chip U27, and the other end is grounded; one end of the capacitor C98 is connected to the pin SS of the chip U27, and the other end is grounded; one end of the capacitor C99 is connected to the pin BOOT of the chip U27, and the other end is connected to the pin SW of the chip U27, the cathode of the diode D17 and the inductor L7; the anode of the diode D17 is grounded; the end of the inductor L7 away from the capacitor C99 is connected to the polarized capacitor C103, the capacitor C101 and the resistor R134, and is connected to the pin VCCNP1 It is connected to the positive high-voltage acquisition chip in the acquisition chip; the polarized capacitor C103 and the capacitor C101 are both grounded at one end away from the inductor L7; one end of the resistor R130 is connected to the pin FB of the chip U27 and the resistor R131, and the other end is grounded; the end of the resistor R131 away from the resistor R130 is connected to the resistor R133 and the capacitor C100; the ends of the resistor R133 and the capacitor C100 away from the resistor R131 are connected to the end of the resistor R134 away from the inductor L7; the pins VIN and EN of the chip U27 are both connected to the power supply voltage in the power module, and the pins EP and GND are both grounded.

[0017] Furthermore, the operational amplifier chip includes: capacitor C80, charge pump chip U22, capacitor C78 and capacitor C79;

[0018] The two ends of the capacitor C80 are respectively connected to the pins CAP+ and CAP- of the charge pump chip U22; the pin GND of the charge pump chip U22 is grounded, the pin V+ is connected to the power supply voltage VCC and the capacitor C78 in the power module, the pin VOUT is connected to the capacitor C79, and is connected to the acquisition chip and the ADC module through the pin VCBP-; the ends of the capacitors C78 and C79 away from the charge pump chip U22 are both grounded.

[0019] Furthermore, the main control chip includes: capacitor C27, capacitor C31, capacitor C32, capacitor C58, resistor R46, resistor R45, resistor R48, resistor R49, crystal oscillator X1, chip X2 and communication interface U6;

[0020] One end of the capacitor C27, the capacitor C31, the capacitor C32, the resistor R48, and the resistor R49 are all connected to the communication interface U6; the other ends of the capacitor C27, the capacitor C31, the capacitor C32, and the resistor R49 are all grounded; the other end of the resistor R48 is connected to the power supply voltage VCC3V3 in the power module;

[0021] One end of the capacitor C58 is connected to the pin VDD of the chip X2 and the supply voltage VCC3V3, and the other end is grounded;

[0022] One end of the resistor R46 is connected to the communication interface U6 and the resistor R45, and the other end is connected to the power supply voltage VCC3V3; the end of the resistor R45 away from the resistor R46 is grounded;

[0023] The two ends of the crystal oscillator X1 are connected to one end of the capacitor C27 and one end of the capacitor C31 respectively;

[0024] The pin OUT of the chip X2 is connected to the communication interface U6, and the pin GND is grounded.

[0025] Furthermore, the power supply module includes a first power supply circuit, a second power supply circuit and a third power supply circuit;

[0026] The first power supply circuit is connected to the second power supply circuit, the third power supply circuit, the operational amplifier chip and the acquisition chip; the second power supply circuit is connected to the main control chip and the ADC module; and the third power supply circuit is connected to the main control chip.

[0027] Furthermore, the acquisition chip includes: a positive high voltage acquisition chip and a negative high voltage acquisition chip; the positive high voltage acquisition chip and the negative high voltage acquisition chip are both connected to the ADC module.

[0028] Furthermore, the positive high voltage acquisition chip includes: interface CN4, capacitor C85, resistor R106, resistor R120, resistor R108, capacitor C87, chip U23, capacitor C82, diode D12, resistor R110, resistor R112 and resistor R111;

[0029] The first and fourth pins of the interface CN4 are grounded, and the third pin is connected to the pin VCCNP1; one end of the capacitor C85, the resistor R106, and the resistor R108 are connected to the second pin of the interface CN4; the other end of the capacitor C85 is grounded; the other end of the resistor R106 is connected to one end of the resistor R120, and the other end of the resistor R120 is grounded; the other end of the resistor R108 is connected to one end of the capacitor C87 and the pin 1IN+ of the chip U23; the other end of the capacitor C87 is grounded; the pin 1IN- and the pin 1OUT of the chip U23 are connected to the resistor R112, and the pin VCC- is connected to the pin VCBP - is connected to the negative high-voltage acquisition chip, operational amplifier chip and ADC module, pin VCC+ is connected to the supply voltage VCC of the power module and capacitor C82, pin 2OUT is connected to the diode D12, and pin 2IN+ is connected to the resistor R110; the end of the resistor R110 away from the chip U23 is grounded; the end of the capacitor C82 away from the chip U23 is connected to the pin VCBP-; the cathode of the diode D12 and one end of the resistor R111 are connected to the ADC module; the end of the resistor R112 away from the pin 1OUT is connected to pin 2IN- of the chip U23 and the other end of the resistor R111.

[0030] In addition, the present invention also proposes a high-voltage detection and feedback device for different operating frequencies of a space rod, comprising the high-voltage detection and feedback circuit for different operating frequencies of the space rod as described above, and also comprising a detection device; the high-voltage detection and feedback circuit for different operating frequencies of the space rod is installed in the detection device and connected to an external device; the detection device is used to receive commands from the external device and detect the rising edge and falling edge of the high-voltage start-up of the space rod according to the command. When the rising edge is detected, the conversion function of the ADC module in the high-voltage detection and feedback circuit for different operating frequencies of the space rod is turned on, and vice versa.

[0031] In addition, the present invention also proposes a method for detecting and feedbacking high voltages at different operating frequencies of a space rod, using the above-mentioned device for detecting and feedbacking high voltages at different operating frequencies of a space rod, specifically comprising the following steps:

[0032] Each time the machine is turned on, the rising and falling edges of the high voltage start of the space bar are detected through the external interrupt of the main control chip;

[0033] When the rising edge is detected, the time is recorded. When the falling edge is detected, the high voltage operation ends. The operating frequency of the space rod is calculated by the time from the rising edge to the falling edge.

[0034] When the next rising edge is detected, the conversion function of the ADC module is turned on and data recording is started, and the working cycle of the space rod measured for the first time when power is turned on is used as the total sampling time of the ADC module;

[0035] When a falling edge is detected, the high-voltage operation stops, and the data collected during the total time are processed to obtain a voltage value representing the high-voltage operation of the space rod.

[0036] Through the above technical solution, the present invention has the following beneficial effects:

[0037] By configuring a high-voltage module, an operational amplifier chip, a main control chip, a power module, an acquisition chip, and an ADC module; and connecting the high-voltage module to the power module and the acquisition chip; connecting the operational amplifier chip to the acquisition chip and the ADC module; connecting the main control chip to the power module and the ADC module; and connecting the acquisition chip to the ADC module, the present invention can reduce the differences in high-voltage values ​​collected at different frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of the overall structure of a high-voltage detection feedback circuit for a space rod with different operating frequencies according to one embodiment of the present invention;

[0039] Figure 2 Schematic diagram of the structure of the positive high-voltage circuit in the high-voltage detection feedback circuit of the space rod with different operating frequencies in one embodiment of the present invention;

[0040] Figure 3 Schematic diagram of the structure of the negative high-voltage circuit in the high-voltage detection feedback circuit of the space rod with different operating frequencies in one embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of an operational amplifier chip in a high-voltage detection feedback circuit for a space rod with different operating frequencies according to an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the structure of the main control chip in the high-voltage detection feedback circuit of the space rod at different operating frequencies in one embodiment of the present invention;

[0043] Figure 6 Schematic diagram of the structure of the first power supply circuit in the high-voltage detection feedback circuit of the space rod with different operating frequencies in one embodiment of the present invention;

[0044] Figure 7 Schematic diagram of the structure of the second power supply circuit in the high-voltage detection feedback circuit of the space rod with different operating frequencies in one embodiment of the present invention;

[0045] Figure 8 Schematic diagram of the structure of the third power supply circuit in the high-voltage detection feedback circuit for different operating frequencies of the space rod in one embodiment of the present invention;

[0046] Figure 9 This is a schematic structural diagram of a positive high-voltage acquisition chip in a high-voltage detection feedback circuit for space rods with different operating frequencies according to an embodiment of the present invention;

[0047] Figure 10 Schematic diagram of the structure of the negative high voltage acquisition chip in the high voltage detection feedback circuit of the space rod with different operating frequencies in one embodiment of the present invention;

[0048] Figure 11 This is a schematic structural diagram of an ADC module in a high-voltage detection feedback circuit for a space rod with different operating frequencies according to an embodiment of the present invention;

[0049] Figure 12 This is a schematic diagram of the overall structure of the acquisition chip and ADC module in the high-voltage detection feedback circuit of the space rod with different operating frequencies in one embodiment of the present invention;

[0050] Figure 13 Flowchart of a method for high-voltage detection and feedback of space rods at different operating frequencies according to an embodiment of the present invention;

[0051] Figure 14 This is a waveform diagram of the HV+, HV- and ADC modules output from the acquisition chip to the main control chip in the prior art;

[0052] Figure 15 This is a schematic diagram of the waveforms of HV+, HV- and ADC modules output by the acquisition chip to the main control chip in the high-voltage detection and feedback method of different operating frequencies of the space rod in one embodiment of the present invention. DETAILED DESCRIPTION

[0053] The following, in conjunction with the accompanying drawings, provides a more detailed description of a high-voltage detection feedback circuit, device, and method for space rods operating at different frequencies. Preferred embodiments of the present invention are shown. It should be understood that those skilled in the art may modify the invention described herein while still achieving the beneficial effects of the invention. Therefore, the following description should be understood as generally known to those skilled in the art and is not intended to limit the present invention.

[0054] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are provided solely for the purpose of assisting in the description of the embodiments of the present invention.

[0055] like Figure 1 As shown, an embodiment of the present invention proposes a high-voltage detection feedback circuit for space rods with different operating frequencies, including: a high-voltage module, an operational amplifier chip, a main control chip, a power module, an acquisition chip and an ADC module.

[0056] Specifically, the high-voltage module is connected to the power module and the acquisition chip; the operational amplifier chip is connected to the acquisition chip and the ADC module; the main control chip is connected to the power module and the ADC module; and the acquisition chip is connected to the ADC module.

[0057] In this embodiment, the high-voltage module includes a positive high-voltage circuit and a negative high-voltage circuit.

[0058] Specifically, such as Figure 2 As shown, the positive high-voltage circuit includes: capacitor C96, resistor R124, chip U26, capacitor C91, capacitor C92, resistor R122, resistor R123, resistor R128, resistor R129, capacitor C94, diode D16, inductor L6, polarized capacitor C97 and capacitor C95; one end of the capacitor C96 is connected to the power module, and the other end is grounded; one end of the resistor R124 is connected to the pin RT / SYNC of the chip U26, and the other end is grounded; one end of the capacitor C91 is connected to the pin SS of the chip U26, and the other end is grounded; one end of the capacitor C92 is connected to the pin BOOT of the chip U26, and the other end is connected to the pin SW of the chip U26, the cathode of the diode D16 and the inductor L6; the positive pole of the diode D16 is grounded; the inductor One end of L6 away from the capacitor C92 is connected to the polarized capacitor C97, capacitor C95 and resistor R129, and is connected to the positive high-voltage acquisition chip in the acquisition chip through pin VCCNP1; the ends of the polarized capacitor C97 and capacitor C95 away from the inductor L6 are both grounded; one end of the resistor R122 is connected to pin FB of the chip U26 and resistor R123, and the other end is grounded; the end of the resistor R123 away from the resistor R122 is connected to the resistor R128 and capacitor C94; the ends of the resistor R128 and capacitor C94 away from the resistor R123 are connected to the end of the resistor R129 away from the inductor L6; the pins VIN and EN of the chip U26 are both connected to the power supply voltage in the power module, and the pins EP and GND are both grounded.

[0059] In addition, if Figure 3 As shown, the negative high voltage circuit is connected to the negative high voltage acquisition chip in the acquisition chip through the pin VCCNP2.

[0060] In this embodiment, the negative high-voltage circuit includes: capacitor C102, resistor R132, chip U27, capacitor C98, capacitor C99, resistor R130, resistor R131, resistor R133, resistor R134, capacitor C100, diode D17, inductor L7, polarized capacitor C103 and capacitor C101.

[0061] Specifically, one end of the capacitor C102 is connected to the power module, and the other end is grounded; one end of the resistor R132 is connected to the pin RT / SYNC of the chip U27, and the other end is grounded; one end of the capacitor C98 is connected to the pin SS of the chip U27, and the other end is grounded; one end of the capacitor C99 is connected to the pin BOOT of the chip U27, and the other end is connected to the pin SW of the chip U27, the negative electrode of the diode D17 and the inductor L7; the positive electrode of the diode D17 is grounded; the end of the inductor L7 away from the capacitor C99 is connected to the polarized capacitor C103, the capacitor C101 and the resistor R134, and is connected to the pin VCCN. P1 is connected to the positive high-voltage acquisition chip in the acquisition chip; the polarized capacitor C103 and the capacitor C101 are both grounded at one end away from the inductor L7; one end of the resistor R130 is connected to the pin FB of the chip U27 and the resistor R131, and the other end is grounded; the end of the resistor R131 away from the resistor R130 is connected to the resistor R133 and the capacitor C100; the ends of the resistor R133 and the capacitor C100 away from the resistor R131 are connected to the end of the resistor R134 away from the inductor L7; the pins VIN and EN of the chip U27 are both connected to the power supply voltage in the power module, and the pins EP and GND are both grounded.

[0062] In this embodiment, if Figure 4 As shown, the operational amplifier chip includes: capacitor C80, charge pump chip U22, capacitor C78 and capacitor C79.

[0063] Specifically, the two ends of the capacitor C80 are respectively connected to the pins CAP+ and CAP- of the charge pump chip U22; the pin GND of the charge pump chip U22 is grounded, the pin V+ is connected to the power supply voltage VCC and the capacitor C78 in the power module, the pin VOUT is connected to the capacitor C79, and is connected to the acquisition chip and the ADC module through the pin VCBP-; the ends of the capacitors C78 and C79 away from the charge pump chip U22 are both grounded.

[0064] In this embodiment, if Figure 5 As shown, the main control chip includes: capacitor C27, capacitor C31, capacitor C32, capacitor C58, resistor R46, resistor R45, resistor R48, resistor R49, crystal oscillator X1, chip X2 and communication interface U6.

[0065] Specifically, one ends of the capacitor C27, capacitor C31, capacitor C32, resistor R48 and resistor R49 are all connected to the communication interface U6; the other ends of the capacitor C27, capacitor C31, capacitor C32 and resistor R49 are all grounded; the other end of the resistor R48 is connected to the power supply voltage VCC3V3 in the power module; one end of the capacitor C58 is connected to the pin VDD of the chip X2 and the power supply voltage VCC3V3, and the other end is grounded; one end of the resistor R46 is connected to the communication interface U6 and the resistor R45, and the other end is connected to the power supply voltage VCC3V3; the end of the resistor R45 away from the resistor R46 is grounded; the two ends of the crystal oscillator X1 are respectively connected to one end of the capacitor C27 and the capacitor C31; the pin OUT of the chip X2 is connected to the communication interface U6, and the pin GND is grounded.

[0066] In this embodiment, if Figure 6-Figure 8 As shown, the power supply module includes a first power supply circuit, a second power supply circuit and a third power supply circuit.

[0067] Specifically, such as Figure 6 As shown, the first power supply circuit includes a power supply voltage, a capacitor C105, a capacitor C112, a capacitor C111, a chip U29, a diode D19, an inductor L8, a resistor R136, a resistor R137, a capacitor C107, a capacitor C106 and a power supply voltage VCC; the power supply voltage is connected to the capacitor C112, the capacitor C111 and the pin VIN and the pin SHDN of the chip U29; the capacitor C112 and the capacitor C111 are both grounded at one end away from the power supply voltage; the two ends of the capacitor C105 are respectively connected to the pin SW and the pin CB of the chip U29, and one end is connected to the diode D19 and the inductor L8; the diode D19 is away from the One end of the capacitor C105 is connected to the pin GND of the chip U29 and is grounded; the end of the inductor L8 away from the capacitor C105 is connected to the resistor R136, the capacitor C107 and the power supply voltage VCC; the end of the resistor R136 away from the inductor L8 is connected to the pin FB of the chip U29 and the resistor R137; the end of the resistor R137 away from the resistor R136 is grounded; the capacitor C106 is connected to the power supply voltage VCC; the ends of the capacitor C107 and the capacitor C106 away from the power supply voltage VCC are both grounded; the power supply voltage VCC is connected to the second power supply circuit, the third power supply circuit, the operational amplifier chip and the acquisition chip.

[0068] Among them, the power supply voltage can be set according to actual needs, for example, if it is 24V, the power supply voltage VCC3V3 is 3.3V; all chips are powered by converting 24V to 5V and 5V to 3.3V.

[0069] In addition, the second power supply circuit is connected to the main control chip and the ADC module; the third power supply circuit is connected to the main control chip.

[0070] Among them, Figure 7 As shown, the second power supply circuit includes a diode D18, a capacitor C108, a resistor R135, a chip U28, a capacitor C109, a capacitor C110, a capacitor C114 and a power supply voltage VCC3V3.

[0071] Specifically, one end of the diode D18 is connected to the power supply voltage VCC, and the other end is connected to the capacitor C108 and the pin VIN of the chip U28; the end of the capacitor C108 away from the diode D18 and the pin GND and pin NC of the chip U28 are all grounded; one end of the resistor R135 is connected to the pin INHIBIT of the chip U28, and the other end is grounded; one end of the capacitor C109, capacitor C110 and capacitor C114 are all connected to the pin VOUT of the chip U28 and the power supply voltage VCC3V3, and the other ends of the capacitor C109, capacitor C110 and capacitor C114 are all grounded; the power supply voltage VCC3V3 is connected to the main control chip and the ADC module.

[0072] In this embodiment, if Figure 8 As shown, the third power supply circuit includes a resistor R97, a capacitor C42, a capacitor C43, a capacitor C75, a chip U9 and a power supply voltage VDD3V3.

[0073] Specifically, one end of the resistor R97 is connected to the power supply voltage VCC, and the other end is connected to the capacitor C42, capacitor C75 and pin IN of the chip U9; the other ends of the capacitor C42 and capacitor C75 are both grounded; the pin GND of the chip U9 is grounded, and the pin OUT is connected to the power supply voltage VDD3V3; one end of the capacitor C43 is connected to the power supply voltage VDD3V3, and the other end is grounded; the power supply voltage VDD3V3 is connected to the pin VDDA in the main control chip.

[0074] In this embodiment, if Figure 9-10 As shown, the acquisition chip includes: a positive high voltage acquisition chip and a negative high voltage acquisition chip; the positive high voltage acquisition chip and the negative high voltage acquisition chip are both connected to the ADC module.

[0075] In one embodiment, if Figure 9 As shown, the positive high voltage acquisition chip includes: interface CN4, capacitor C85, resistor R106, resistor R120, resistor R108, capacitor C87, chip U23, capacitor C82, diode D12, resistor R110, resistor R112 and resistor R111.

[0076] Specifically, the first and fourth pins of the interface CN4 are grounded, and the third pin is connected to the pin VCCNP1; one end of the capacitor C85, the resistor R106, and the resistor R108 are connected to the second pin of the interface CN4; the other end of the capacitor C85 is grounded; the other end of the resistor R106 is connected to one end of the resistor R120, and the other end of the resistor R120 is grounded; the other end of the resistor R108 is connected to one end of the capacitor C87 and the pin 1IN+ of the chip U23; the other end of the capacitor C87 is grounded; the pin 1IN- and the pin 1OUT of the chip U23 are connected to the resistor R112, and the pin VCC- is connected to the pin VC BP- is connected to the negative high-voltage acquisition chip, operational amplifier chip and ADC module, pin VCC+ is connected to the supply voltage VCC of the power module and capacitor C82, pin 2OUT is connected to the diode D12, and pin 2IN+ is connected to the resistor R110; the end of the resistor R110 away from the chip U23 is grounded; the end of the capacitor C82 away from the chip U23 is connected to the pin VCBP-; the cathode of the diode D12 and one end of the resistor R111 are connected to the ADC module; the end of the resistor R112 away from the pin 1OUT is connected to pin 2IN- of the chip U23 and the other end of the resistor R111.

[0077] In one embodiment, if Figure 10 As shown, the negative high voltage acquisition chip includes: interface CN3, capacitor C86, resistor R107, resistor R121, resistor R109, capacitor C88, chip U24, capacitor C83, diode D13, resistor R113, resistor R115 and resistor R114.

[0078] Specifically, the first and fourth pins of the interface CN3 are grounded, and the third pin is connected to the pin VCCNP2; one end of the capacitor C86, the resistor R107, and the resistor R109 are connected to the second pin of the interface CN3; the other end of the capacitor C86 is grounded; the other end of the resistor R107 is connected to one end of the resistor R121, and the other end of the resistor R121 is grounded; the other end of the resistor R109 is connected to one end of the capacitor C88 and the pin 1IN+ of the chip U24; the other end of the capacitor C88 is grounded; the pin 1IN- and the pin 1OUT of the chip U24 are connected to the resistor R115, and the pin VCC- is connected to the pin VC BP- is connected to the negative high-voltage acquisition chip, operational amplifier chip and ADC module, pin VCC+ is connected to the supply voltage VCC of the power module and capacitor C83, pin 2OUT is connected to the diode D13, and pin 2IN+ is connected to the resistor R113; the end of the resistor R113 away from the chip U24 is grounded; the end of the capacitor C83 away from the chip U24 is connected to the pin VCBP-; the cathode of the diode D13 and one end of the resistor R114 are connected to the ADC module; the end of the resistor R115 away from the pin 1OUT is connected to pin 2IN- of the chip U24 and the other end of the resistor R114.

[0079] In this embodiment, if Figure 11 and Figure 12 As shown, the ADC module includes: chip U25, resistor R116, resistor R118, capacitor C89, diode D14, resistor R117, resistor R119, capacitor C84, capacitor C90 and diode D15.

[0080] Specifically, the pin 1IN+ of the chip U25 is connected to the resistor R111 and the diode D12, the pin VCC- is connected to the pin VCBP-, and the pin 2IN+ is connected to the resistor R114 and the diode D13. One end of the resistor R116 is connected to the pin 1IN- of the chip U25, and the other end is connected to one end of the resistor R118; one end of the resistor R118 is connected to the pin 1OUT of the chip U25, and the other end is connected to the capacitor C89 and the diode D14. The other end of the resistor R118 is also connected to the pin PA5 of the chip U6 in the main control chip through the pin AHV+; the diode D14 is grounded away from the positive pole of the capacitor C89, and the negative pole is connected to the power supply voltage VCC3V3; the end of the capacitor C89 away from the resistor R118 is grounded; one end of the capacitor C84 is connected to the power supply The voltage VCC is connected to the pin VCC+ of the chip U25, and the other end is connected to the pin VCBP-; one end of the resistor R117 is connected to the pin 2IN- of the chip U25, and the other end is connected to the pin 2OUT of the chip U25 and one end of the resistor R119; the other end of the resistor R119 is connected to the diode D15 and one end of the capacitor C90, and is connected to the pin PA4 of the chip U6 in the main control chip through the pin AHV-; the other end of the capacitor C90 is grounded; the diode D15 is grounded away from the positive pole of the resistor R119, and the negative pole is connected to the power supply voltage VCC3V3.

[0081] The diode D12, the diode D13, the diode D14 and the diode D15 are each a pair of series-connected diodes.

[0082] In addition, this embodiment also provides a high-voltage detection and feedback device for space rods with different operating frequencies, comprising the above-described high-voltage detection and feedback circuit for space rods with different operating frequencies, and a detection device; the high-voltage detection and feedback circuit for space rods with different operating frequencies is installed in the detection device and connected to an external device; the detection device is configured to receive commands from the external device and, based on the commands, detect the rising and falling edges of the high-voltage activation of the space rod. Upon detecting a rising edge, the conversion function of the ADC module in the high-voltage detection and feedback circuit for space rods with different operating frequencies is enabled, and otherwise disabled. For clarity, the detection device and external device are not shown in the figure.

[0083] In addition, if Figure 13 As shown, this embodiment further proposes a method for detecting and feedbacking high voltages at different operating frequencies of a space rod, using the above-mentioned device for detecting and feedbacking high voltages at different operating frequencies of a space rod, specifically including the following:

[0084] S1. Each time the device is turned on, the rising and falling edges of the high voltage start of the space bar are detected through the external interrupt of the main control chip;

[0085] S2. Start recording time when a rising edge is detected. When a falling edge is detected, the high voltage operation ends. The operating frequency of the space rod is calculated based on the time from the rising edge to the falling edge.

[0086] S3. When the next rising edge is detected, the conversion function of the ADC module is turned on and data recording is started. The working cycle of the space rod measured for the first time when power is turned on is used as the total sampling time of the ADC module.

[0087] S4. When a falling edge is detected, the high-voltage operation is stopped, and the data collected during the total time are processed to obtain a voltage value representing the high-voltage operation of the space rod.

[0088] In one embodiment, in the prior art, each time the computer is turned on, the main control chip (i.e., the single chip microcomputer) starts ADC (ADC module) conversion. Figure 14 As shown, because sampling is continuous, data is collected regardless of whether the high voltage is operating or not. When a certain number of samples are collected, data processing begins. This data includes both actual high voltage values ​​and values ​​after the high voltage is turned off. The software removes the values ​​after the high voltage is turned off. For example, values ​​less than 1 are removed, and the remaining values ​​are averaged. Because the activation and deactivation of the high voltage takes time, it is not reasonable to use a threshold to remove useless data. This would lead to deviations between the final data and the actual data.

[0089] Therefore, in order to reduce the deviation of the data, in a specific example, the deviation between the final data and the actual data is reduced by real-time tracking frequency and targeted measurement. More specifically, Figure 15 The waveforms shown are output from the acquisition chips (i.e., the positive and negative high-voltage acquisition chips) to the HV+, HV-, and ADC modules of the main control chip. Each time the system is powered on, the microcontroller (i.e., the main control chip) detects the rising edge of the high-voltage startup signal through an external interrupt. Once a rising edge is detected, time recording begins. When a falling voltage is detected, the high-voltage operation ends. The time from the rising edge to the falling edge is used to calculate the current operating frequency of the space bar, which is the required ADC sampling time. Furthermore, when the next rising edge is detected, the ADC conversion function is enabled. Data recording begins, and the total ADC sampling time is calculated based on the frequency period of the first measurement at power-up (the first power-on data). When a falling edge occurs, the high-voltage operation ends, and data processing begins. The average of the data collected during this total time is converted to the voltage value during high-voltage operation. This cycle repeats regardless of the space bar's operating frequency. The ADC module accurately samples the high-voltage value.

[0090] In addition, the positive and negative high-voltage acquisition chips can achieve a 1V voltage by dividing the voltage by a resistor divider of 999M:1M (1000V). The signal is filtered by RC filtering and followed by an op amp chip for impedance matching. The sampled signal is then inverted by an inverse proportional operational amplifier, meaning that the positive signal remains positive while the negative signal is inverted to positive, serving as a half-wave rectifier for the diodes (diodes D12 and D13). For AC signals, the diodes (diodes D12 and D13) convert the AC signal to DC. Finally, the signal ratio is processed by a non-inverting proportional amplifier before entering the main control chip and ADC module. For simplicity, the voltage divider resistors and RC filter are not shown in the diagram.

[0091] In this embodiment, a command is sent to the detection device in the space rod through an external device (such as a mobile phone); the detection device detects the rising edge and falling edge of the high voltage startup of the space rod according to the command; when the rising edge is detected, the conversion function of the ADC module is turned on, and when the falling edge is detected, the conversion function of the ADC module is turned off, thereby reducing the difference in high voltage values ​​collected at different frequencies.

[0092] In summary, the present invention provides a high-voltage detection feedback circuit, device, and method for space rods with different operating frequencies, which have the following advantages:

[0093] By configuring a high-voltage module, an operational amplifier chip, a main control chip, a power module, an acquisition chip, and an ADC module; and connecting the high-voltage module to the power module and the acquisition chip; connecting the operational amplifier chip to the acquisition chip and the ADC module; connecting the main control chip to the power module and the ADC module; and connecting the acquisition chip to the ADC module, the present invention can reduce the differences in high-voltage values ​​collected at different frequencies.

[0094] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A high-voltage detection feedback circuit for space rods with different operating frequencies, characterized in that: include: High-voltage module, operational amplifier chip, main control chip, power module, acquisition chip and ADC module; The high-voltage module is connected to the power module and the acquisition chip; The operational amplifier chip is connected to the acquisition chip and the ADC module; The main control chip is connected to the power module and the ADC module; The acquisition chip is connected to the ADC module; The operational amplifier chip includes: capacitor C80, charge pump chip U22, capacitor C78 and capacitor C79; The two ends of the capacitor C80 are respectively connected to the pins CAP+ and CAP- of the charge pump chip U22; the pin GND of the charge pump chip U22 is grounded, the pin V+ is connected to the power supply voltage VCC and the capacitor C78 in the power module, the pin VOUT is connected to the capacitor C79, and is connected to the acquisition chip and the ADC module through the pin VCBP-; the ends of the capacitors C78 and C79 away from the charge pump chip U22 are both grounded.

2. The high-voltage detection feedback circuit for space rods with different operating frequencies according to claim 1, characterized in that: The high voltage module includes: a positive high voltage circuit and a negative high voltage circuit; The positive high-voltage circuit includes: capacitor C96, resistor R124, chip U26, capacitor C91, capacitor C92, resistor R122, resistor R123, resistor R128, resistor R129, capacitor C94, diode D16, inductor L6, polarized capacitor C97 and capacitor C95; One end of the capacitor C96 is connected to the power module, and the other end is grounded; one end of the resistor R124 is connected to the pin RT / SYNC of the chip U26, and the other end is grounded; one end of the capacitor 91 is connected to the pin SS of the chip U26, and the other end is grounded; one end of the capacitor C92 is connected to the pin BOOT of the chip U26, and the other end is connected to the pin SW of the chip U26, the cathode of the diode D16 and the inductor L6; the anode of the diode D16 is grounded; the end of the inductor L6 away from the capacitor C92 is connected to the polarized capacitor C97, the capacitor C95 and the resistor R129, and is connected to the VCCNP1 pin through the VCCNP1 pin. The positive high-voltage acquisition chip in the acquisition chip is connected; the ends of the polarized capacitor C97 and the capacitor C95 away from the inductor L6 are both grounded; one end of the resistor R122 is connected to the pin FB of the chip U26 and the resistor R123, and the other end is grounded; the end of the resistor R123 away from the resistor R122 is connected to the resistor R128 and the capacitor C94; the ends of the resistor R128 and the capacitor C94 away from the resistor R123 are connected to the end of the resistor R129 away from the inductor L6; the pins VIN and EN of the chip U26 are both connected to the power supply voltage in the power module, and the pins EP and GND are both grounded; The negative high voltage circuit is connected to the negative high voltage acquisition chip in the acquisition chip through the pin VCCNP2.

3. The high-voltage detection feedback circuit for space rods with different operating frequencies as claimed in claim 2, characterized in that: The negative high-voltage circuit includes: capacitor C102, resistor R132, chip U27, capacitor C98, capacitor C99, resistor R130, resistor R131, resistor R133, resistor R134, capacitor C100, diode D17, inductor L7, polarized capacitor C103 and capacitor C101; One end of the capacitor C102 is connected to the power module, and the other end is grounded; one end of the resistor R132 is connected to the pin RT / SYNC of the chip U27, and the other end is grounded; one end of the capacitor 91 is connected to the pin SS of the chip U27, and the other end is grounded; one end of the capacitor C99 is connected to the pin BOOT of the chip U27, and the other end is connected to the pin SW of the chip U27, the negative electrode of the diode D17 and the inductor L7; the positive electrode of the diode D17 is grounded; the end of the inductor L7 away from the capacitor C99 is connected to the polarized capacitor C103, the capacitor C101 and the resistor R134, and is connected to the VCCNP1 pin through the VCCNP1 pin. The positive high-voltage acquisition chip in the acquisition chip is connected; the polarized capacitor C103 and the capacitor C101 are both grounded at one end away from the inductor L7; one end of the resistor R130 is connected to the pin FB of the chip U27 and the resistor R131, and the other end is grounded; the end of the resistor R131 away from the resistor R130 is connected to the resistor R133 and the capacitor C100; the ends of the resistor R133 and the capacitor C100 away from the resistor R131 are connected to the end of the resistor R134 away from the inductor L7; the pins VIN and EN of the chip U27 are both connected to the power supply voltage in the power module, and the pins EP and GND are both grounded.

4. The high-voltage detection feedback circuit for space rods with different operating frequencies as claimed in claim 1, characterized in that: The main control chip includes: capacitor C27, capacitor C31, capacitor C32, capacitor C58, resistor R46, resistor R45, resistor R48, resistor R49, crystal oscillator X1, chip X2 and communication interface U6; One end of the capacitor C27, the capacitor C31, the capacitor C32, the resistor R48, and the resistor R49 are all connected to the communication interface U6; the other ends of the capacitor C27, the capacitor C31, the capacitor C32, and the resistor R49 are all grounded; the other end of the resistor R48 is connected to the power supply voltage VCC3V3 in the power module; One end of the capacitor C58 is connected to the pin VDD of the chip X2 and the supply voltage VCC3V3, and the other end is grounded; One end of the resistor R46 is connected to the communication interface U6 and the resistor R45, and the other end is connected to the power supply voltage VCC3V3; the end of the resistor R45 away from the resistor R46 is grounded; The two ends of the crystal oscillator X1 are connected to one end of the capacitor C27 and one end of the capacitor C31 respectively; The pin OUT of the chip X2 is connected to the communication interface U6, and the pin GND is grounded.

5. The high-voltage detection feedback circuit for space rods with different operating frequencies as claimed in claim 1, characterized in that: The power supply module includes a first power supply circuit, a second power supply circuit and a third power supply circuit; The first power supply circuit is connected to the second power supply circuit, the third power supply circuit, the operational amplifier chip and the acquisition chip; the second power supply circuit is connected to the main control chip and the ADC module; and the third power supply circuit is connected to the main control chip.

6. The high-voltage detection feedback circuit for space rods with different operating frequencies as claimed in claim 1, characterized in that: The acquisition chip includes: a positive high voltage acquisition chip and a negative high voltage acquisition chip; the positive high voltage acquisition chip and the negative high voltage acquisition chip are both connected to the ADC module.

7. The high-voltage detection feedback circuit for space rods with different operating frequencies as claimed in claim 6, characterized in that: The positive high voltage acquisition chip includes: interface CN4, capacitor C85, resistor R106, resistor R120, resistor R108, capacitor C87, chip U23, capacitor C82, diode D12, resistor R110, resistor R112 and resistor R111; The first and fourth pins of the interface CN4 are grounded, and the third pin is connected to the pin VCCNP1; one end of the capacitor C85, the resistor R106, and the resistor R108 are connected to the second pin of the interface CN4; the other end of the capacitor C85 is grounded; the other end of the resistor R106 is connected to one end of the resistor R120, and the other end of the resistor R120 is grounded; the other end of the resistor R108 is connected to one end of the capacitor C87 and the pin 1IN+ of the chip U23; the other end of the capacitor C87 is grounded; the pin 1IN- and the pin 1OUT of the chip U23 are connected to the resistor R112, and the pin VCC- is connected to the pin VCBP - is connected to the negative high-voltage acquisition chip, operational amplifier chip and ADC module, pin VCC+ is connected to the supply voltage VCC of the power module and capacitor C82, pin 2OUT is connected to the diode D12, and pin 2IN+ is connected to the resistor R110; the end of the resistor R110 away from the chip U23 is grounded; the end of the capacitor C82 away from the chip U23 is connected to the pin VCBP-; the cathode of the diode D12 and one end of the resistor R111 are connected to the ADC module; the end of the resistor R112 away from the pin 1OUT is connected to pin 2IN- of the chip U23 and the other end of the resistor R111.

8. A high-voltage detection and feedback device for a space rod with different operating frequencies, comprising a high-voltage detection and feedback circuit for a space rod with different operating frequencies according to any one of claims 1 to 7, characterized in that: It also includes a detection device; the high-voltage detection feedback circuit of different operating frequencies of the space rod is installed in the detection device and is connected to an external device; the detection device is used to receive commands from the external device and detect the rising edge and falling edge of the high-voltage startup of the space rod according to the command. When the rising edge is detected, the conversion function of the ADC module in the high-voltage detection feedback circuit of different operating frequencies of the space rod is turned on, and vice versa.

9. A method for detecting and feedback high voltage at different operating frequencies of a space rod, using the device for detecting and feedback high voltage at different operating frequencies of a space rod as claimed in claim 8, characterized in that: The details include: Each time the machine is turned on, the rising and falling edges of the high voltage start of the space bar are detected through the external interrupt of the main control chip; When the rising edge is detected, the time is recorded. When the falling edge is detected, the high voltage operation ends. The operating frequency of the space rod is calculated by the time from the rising edge to the falling edge. When the next rising edge is detected, the conversion function of the ADC module is turned on and data recording is started, and the working cycle of the space rod measured for the first time when power is turned on is used as the total sampling time of the ADC module; When a falling edge is detected, the high-voltage operation stops, and the data collected during the total time are processed to obtain a voltage value representing the high-voltage operation of the space rod.

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