Power supply and control integrated circuit unit for photoelastic modulator
By using external switch control and power delay circuit, combined with a microcontroller management unit and DA conversion output module, the problems of power overshoot and timing disorder during the power-on of the photoelastic modulator are solved, achieving stable power-on and flexible parameter adjustment of the device, and reducing development costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2026-03-24
AI Technical Summary
When the photoelastic modulator is powered on, timing problems may occur due to power supply voltage overshoot and excessively fast power-up speed, which can affect the reliability and initialization of the device.
The power-on process is controlled by an external switch, and the power delay circuit and microcontroller management unit module prevent instantaneous power-on overshoot. The output parameters can be flexibly adjusted to achieve frequency and amplitude control of analog signals, combined with DA conversion output module and storage function.
It effectively prevents power overshoot, ensures stable power-on of equipment, avoids timing chaos, reduces development costs and time, and improves equipment flexibility and reliability.
Smart Images
Figure CN224035796U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to control circuit technical field, concretely is a kind of power supply and control integrated circuit unit for photoelastic modulator. BACKGROUND
[0002] When the photoelastic modulator is started, the sudden change of power supply voltage may cause overshoot phenomenon. This overshoot voltage may exceed the rated voltage range of electronic components, causing irreversible damage to sensitive components such as chips and capacitors, affecting the reliability and service life of the equipment. In addition, too fast power-on speed may cause timing confusion in the circuit, making the device unable to initialize and start normally. Therefore, the design of power-on delay circuit and overshoot suppression circuit is crucial to ensure the stable operation of electronic equipment. Existing power supplies, such as switching power supplies and linear power supplies, have different output characteristics at the moment of starting. Due to its working principle, switching power supply may generate large voltage fluctuation and overshoot when starting. Although linear power supply is relatively stable, it may also be affected by load changes.
[0003] Therefore, the utility model provides a kind of power supply and control integrated circuit unit for photoelastic modulator. UTILITY MODEL CONTENT
[0004] In view of the deficiencies of the prior art, the utility model aims to provide a power supply and control integrated circuit unit for photoelastic modulator to solve the problems raised in the background art. The utility model controls the power-on process through an external switch to prevent large overshoot during instantaneous power-on or cause timing confusion during power-on of other module circuits. The amplitude, frequency and other parameters of the output analog signal can be flexibly adjusted through single-chip programming, allowing the device to be used in different application scenarios, reducing development cost and time. The DA conversion output module is controlled by a single-chip microcomputer and can read local storage information to achieve DA conversion output related to demand. The results of DA conversion output can also be stored locally in real time, making the operation more flexible.
[0005] To achieve the above purpose, the utility model is implemented by the following technical solutions: a power supply and control integrated circuit unit for photoelastic modulator, comprising a management unit module, a power delay circuit and a DAC module. The DAC module includes a DA conversion output module and a DA conversion data storage module. The management unit module includes a single-chip microcomputer, a serial data interface, a USB interface, a power supply and an analog control output interface, and a management unit indicator light. The power delay circuit includes a power input interface, a power control switch and a power indicator light. The DAC module includes DAC channel A and DAC channel B. The management unit module corresponds to the power delay circuit and the DAC module.
[0006] Further, the management unit indicator light comprises a management unit power supply indicator light and a state indicator light, the management unit module is connected with a PC computer through a serial data interface, and a data clock line is arranged between the management unit module and the DA conversion output module.
[0007] Further, the DAC module further comprises an external PEM driver interface, and the DA conversion output module is electrically connected with the external PEM driver interface.
[0008] Further, the management unit module further comprises a management unit power supply module, the power supply delay circuit further comprises a MOS switch delay circuit, the power supply input interface corresponds to the MOS switch delay circuit and the management unit power supply module, and the external PEM driver interface is electrically connected with the MOS switch delay circuit.
[0009] Further, a load switch is arranged between the DAC module and the MOS switch delay circuit, the load switch corresponds to the management unit module, and the load switch corresponds to the DA conversion output module.
[0010] Further, the DA conversion data storage module comprises an external storage unit, and the management unit module further comprises an SPI interface, and the external storage unit corresponds to the SPI interface.
[0011] The utility model discloses a beneficial effect:
[0012] 1, through external switch control power -on process, and power -on process can be delayed through power supply delay circuit, prevents transient power -on and produces greater overshoot or leads to other module circuit power -on time sequence confusion.
[0013] 2, control through the singlechip in management unit module, load end power supply is controllable, and can be through singlechip programming flexible adjustment output analog signal's amplitude, frequency etc.
[0014] 3, DA conversion output module is controlled by the singlechip, can read local storage information and realizes demand related DA conversion output, also can store the result of DA conversion output to local in real time, and it is more flexible to operate. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a circuit block diagram of the utility model discloses a kind of power supply and control integrated circuit unit for photoelastic modulator;
[0016] Figure 2 It is the front view of the utility model discloses a kind of power supply and control integrated circuit unit for photoelastic modulator;
[0017] Figure 3The utility model provides a left view for power supply and control integrated circuit unit of photoelastic modulator,
[0018] Figure 4 The utility model provides a right view for power supply and control integrated circuit unit of photoelastic modulator,
[0019] Figure 5 The utility model provides a structure schematic drawing for power supply and control integrated circuit unit of photoelastic modulator,
[0020] Figure 6 The utility model provides a circuit diagram for power supply and control integrated circuit unit of photoelastic modulator,
[0021] Figure 7 The utility model provides a management unit circuit diagram in power supply and control integrated circuit unit for photoelastic modulator,
[0022] In the drawing: 1, management unit pilot lamp;2, serial data interface;3, USB interface;4, power control switch;5, power pilot lamp;6, DAC channel A;7, DAC channel B;8, power and analog control output interface;9, power input interface;10, DAC module;11, management unit module;12, power delay circuit. DETAILED DESCRIPTION
[0023] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.
[0024] Please refer to Figures 1 to 7 The utility model provides a technical scheme: a power supply and control integrated circuit unit for photoelastic modulator, including management unit module 11, power delay circuit 12 and DAC module 10, the DAC module 10 includes DA conversion output module and DA conversion data storage module, management unit module 11 includes singlechip, serial data interface 2, USB interface 3, power and analog control output interface 8, management unit pilot lamp 1, power delay circuit 12 includes power input interface 9, power control switch 4 and power pilot lamp 5, and DAC module 10 includes DAC channel A 6 and DAC channel B 7, and management unit module 11 corresponds to power delay circuit 12 and DAC module 10.
[0025] In this embodiment, management unit pilot lamp 1 includes management unit power pilot lamp and state pilot lamp, and management unit module 11 is connected with PC computer through serial data interface 2, and data clock line is arranged between management unit module 11 and DA conversion output module.
[0026] Specifically, the power supply module of the management unit and the power supply indicator of the management unit are connected, and when working, the management unit module 11 is powered on, and then the DA power control I / O is powered on in sequence according to the needs, and the DA conversion output module is powered on, the serial data interface 2 connected with the PC computer receives data, and the DA data of the device terminal is configured, the data clock line is connected with the DA conversion output module, the data is sent, and the DA conversion output module provides the generated analog level to the PEM driver through the external PEM driver interface through the high-precision DA signal processing module through the external PEM driver interface.
[0027] The management unit module 11 receives data, which can be set by the corresponding voltage table of the wave band configured by the program, or can be configured by reading the wave band corresponding voltage table from the external storage unit. At the same time, the management unit can save the configured data to the external storage unit after configuration.
[0028] The DAC module 10 also includes an external PEM driver interface, and the DA conversion output module is electrically connected with the external PEM driver interface.
[0029] Specifically, the DA data instruction configured by the single-chip microcomputer program of the management unit module 11 is sent to the DA conversion output module through the data clock line. The analog voltage obtained after the high-precision DA signal processing module in the DA conversion output module is provided to the PEM driver for use.
[0030] The management unit module 11 also includes a management unit power supply module, the power supply delay circuit 12 also includes a MOS switch delay circuit, the power input interface 9 corresponds to the MOS switch delay circuit and the management unit power supply module, and the external PEM driver interface is electrically connected with the MOS switch delay circuit.
[0031] Specifically, after being powered on through the power input interface 9, the switch is pressed, the MOS switch tube with the delay circuit has a certain delay in the power-on process, and the power voltage is from 0 to VDD for more than 200ms. In this way, the power-on effectively prevents transient power-on overshoot, and also avoids the power-on timing confusion of other modules.
[0032] The load switch is arranged between the DAC module 10 and the MOS switch delay circuit, the load switch corresponds to the management unit module 11, and the load switch corresponds to the DA conversion output module.
[0033] Specifically, the single-chip microcomputer of the management unit module 11 controls the load switch after power-on, and the timing and interval time of power-on can be realized by software programming; the management unit module 11 opens the power supply of the DA conversion module by default after power-on, and the DA voltage is configured as 0V to ensure safe power-on of the equipment. The single-chip microcomputer of the management unit module 11 sends the DA instruction to the DA conversion module after the DA instruction is configured by the computer host software
[0034] Further, the DA conversion data storage module includes an external storage unit, and the management unit module 11 further includes an SPI interface corresponding to the external storage unit.
[0035] Specifically, on the one hand, the single-chip microcomputer program of the management unit module 11 has a default wave band and voltage comparison table stored therein; on the other hand, the latest wave band and voltage comparison table is stored in the external storage device of the single-chip microcomputer through the computer terminal, and the new comparison table will be updated to the firmware after the next power-on. At the same time, the single-chip microcomputer program of the management unit module 11 can store the real-time DA configuration result in the external storage unit for subsequent troubleshooting and analysis.
[0036] Workflow: First, check the off state of the power switch before power-on, and the power supply and analog control output DB9 interface connection is normal; after checking, power on, the power indicator 5 is bright red, turn on the power switch; the power-on process can be detected by the oscilloscope for more than 200mS. The single-chip microcomputer of the management unit module 11 is powered on, the power indicator of the management unit indicator 1 is bright, the program starts running, and the status indicator is bright. The DA conversion instruction is sent to the management unit through the computer terminal host software to configure the required wave band voltage value before the DA conversion voltage is configured to the PEM driver. Before configuring the DA conversion voltage to the PEM driver, it is necessary to ensure that the equipment has been powered on normally, and 0V analog voltage or no voltage is provided to the PEM driver before this.
[0037] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by those skilled in the art.
Claims
1. A power supply and control integrated circuit unit for a photoelastic modulator, comprising a management unit module (11), a power delay circuit (12), and a DAC module (10), characterized in that, The DAC module (10) includes a DA conversion output module and a DA conversion data storage module. The management unit module (11) includes a microcontroller, a serial data interface (2), a USB interface (3), a power and analog control output interface (8), and a management unit indicator (1). The power delay circuit (12) includes a power input interface (9), a power control switch (4), and a power indicator (5). The DAC module (10) includes DAC channel A (6) and DAC channel B (7). The management unit module (11) corresponds to the power delay circuit (12) and the DAC module (10).
2. The power supply and control integrated circuit unit for a photoelastic modulator according to claim 1, characterized in that: The management unit indicator (1) includes a management unit power indicator and a status indicator. The management unit module (11) is connected to a PC through a serial data interface (2). A data clock line is provided between the management unit module (11) and the DA conversion output module.
3. The power supply and control integrated circuit unit for a photoelastic modulator according to claim 1, characterized in that: The DAC module (10) also includes an external PEM driver interface, and the DA conversion output module is electrically connected to the external PEM driver interface.
4. The power supply and control integrated circuit unit for a photoelastic modulator according to claim 3, characterized in that: The management unit module (11) also includes a management unit power module, the power delay circuit (12) also includes a MOS switch delay circuit, the power input interface (9) corresponds to the MOS switch delay circuit and the management unit power module, and the external PEM driver interface is electrically connected to the MOS switch delay circuit.
5. A power supply and control integrated circuit unit for a photoelastic modulator according to claim 4, characterized in that: A load switch is provided between the DAC module (10) and the MOS switch delay circuit. The load switch corresponds to the management unit module (11) and the DA conversion output module.
6. The power supply and control integrated circuit unit for a photoelastic modulator according to claim 1, characterized in that: The DA conversion data storage module includes an external storage unit, and the management unit module (11) also includes an external storage unit with an SPI interface corresponding to the SPI interface.