Low-power consumption CMOS spectrometer
By designing a low-power CMOS spectrometer and automatically managing the circuit state with the control module, the problem of high power consumption in the unretrieval state of the existing CMOS spectrometer is solved, the low power consumption requirement of portable devices is achieved, and the convenience of use is improved.
Patent Information
- Application Number
- CN202422860703.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-22
AI Technical Summary
The existing CMOS spectrometers need to be turned off manually when the spectral state is not collected, which is inconvenient to use and has high power consumption, making it difficult to meet the low power consumption needs of portable devices.
A low-power CMOS spectrometer is designed, and the constant current source circuit and the temperature acquisition control circuit are automatically controlled by the control module to turn off when the spectral state is not captured. Combined with the positive and negative LDO module and the DCDC module, the dynamic management of the circuit is realized and power consumption is reduced.
Automatically shut down unnecessary circuit functions when not collecting spectra, significantly reducing the power consumption of the CMOS spectrometer and improving portability and ease of use.
Smart Images
Figure CN223307684U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic science, in particular to a low-power CMOS spectrometer. Background Art
[0002] CCDs are commonly used image sensors in spectrometers. They offer high sensitivity, low noise, and a wide dynamic range, making them suitable for demanding optical imaging and spectral analysis. Continuous advancements in CMOS technology have led to advantages such as low power consumption, high integration, low cost, and fast frame rates. In the future, CMOS is expected to gradually replace CCD sensors.
[0003] CMOS's drive and acquisition circuits are simpler than CCDs, allowing for smaller PCBs and making them more suitable for portable applications. Portable devices are typically battery-powered, placing high demands on power consumption and requiring low-power applications. In actual operation, a spectrometer isn't always collecting spectra. After collecting spectra of a sample, it takes time to analyze and process the spectra. During analysis, unnecessary circuit functions can be disabled to reduce power consumption. However, existing CMOS spectrometers require full or manual shutdown when not collecting spectra, making them inconvenient to use. Utility Model Content
[0004] In order to solve the deficiencies in the above-mentioned prior art, the utility model provides a low-power CMOS spectrometer, comprising a control module, a constant current source circuit, a temperature acquisition control circuit, a laser module, and a CMOS spectrum collection module; the control module is respectively connected to the constant current source circuit, the temperature acquisition control circuit, and the CMOS spectrum collection module, and the constant current source circuit and the temperature acquisition control circuit are connected to the laser module; the control module outputs a first enable signal to the temperature acquisition control circuit to control the on and off of the temperature acquisition control circuit, and the control circuit outputs a second enable signal to the constant current source circuit to control the on and off of the constant current source circuit.
[0005] Furthermore, the temperature acquisition control circuit includes a temperature acquisition circuit and a temperature control circuit, the laser module includes a semiconductor refrigeration chip, a thermistor and a laser, the temperature acquisition circuit is connected to the thermistor, and the temperature control circuit is connected to the semiconductor refrigeration chip.
[0006] Furthermore, the CMOS spectrum collection module includes a driving collection circuit and a CMOS sensor. One end of the driving collection circuit is connected to the control module, and the other end is connected to the CMOS sensor.
[0007] Furthermore, the low-power CMOS spectrometer is also provided with a first power supply circuit and a second power supply circuit, the input ends of the first power supply circuit and the second power supply circuit are connected to the output end of the control module, and the output ends of the first power supply circuit and the second power supply circuit are connected to the input ends of the driving acquisition circuit and the CMOS sensor.
[0008] Furthermore, the first power supply circuit includes a positive LDO module, and the control module outputs a third enable signal to the first power supply circuit to control the on and off of the first power supply circuit.
[0009] Furthermore, the second power supply circuit includes a negative voltage DCDC module and a negative LDO module.
[0010] Furthermore, one end of the negative pressure DCDC module is connected to the control module, and the other end is connected to the negative LDO module. The control module outputs a fourth enable signal to the negative pressure DCDC module to control the on and off of the negative pressure DCDC module.
[0011] Furthermore, the input end of the negative LDO module is connected to the output end of the control module and the negative voltage DCDC module, the output end of the negative LDO is connected to the driving acquisition circuit and the CMOS sensor, and the control module outputs a fifth enable signal to the negative LDO module.
[0012] Furthermore, the laser model is a 785nm butterfly laser.
[0013] Based on the above, compared with the existing technology, the low-power CMOS spectrometer provided by the utility model, when not in the spectrum collection state, the control module automatically controls the constant current source circuit and the temperature acquisition control circuit to be turned off through the first enable signal and the second enable signal, thereby turning off the entire branch of the laser, reducing the overall power consumption of the CMOS spectrometer, and having good application value.
[0014] Other features and benefits of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other benefits of the present invention can be achieved and obtained through the structures specifically pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work. The positional relationships described in the drawings in the following description are based on the directions of the components shown in the diagrams, unless otherwise specified.
[0016] Figure 1 A structural block diagram of a low-power CMOS spectrometer provided in one embodiment of the present invention;
[0017] Figure 2 A circuit topology diagram of a low-power CMOS spectrometer provided in one embodiment of the present invention;
[0018] Figure 3 A circuit diagram of a temperature control circuit provided in one embodiment of the present utility model;
[0019] Figure 4 A circuit diagram of a constant current source circuit provided in one embodiment of the present utility model;
[0020] Figure 5 Another structural block diagram of a low-power CMOS spectrometer provided by one embodiment of the utility model;
[0021] Figure 6 A circuit diagram of a positive LDO module provided in one embodiment of the present utility model;
[0022] Figure 7 A circuit diagram of a negative pressure DCDC module provided in one embodiment of the present invention;
[0023] Figure 8 This is a circuit diagram of a negative LDO module provided by one embodiment of the present invention.
[0024] Reference numerals:
[0025] DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0027] In the description of the present invention, it should be noted that all terms (including technical terms and scientific terms) used in the present invention have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and cannot be understood as limiting the present invention; it should be further understood that the terms used in the present invention should be understood to have meanings consistent with the meanings of these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined as such in the present invention.
[0028] The utility model provides a low-power CMOS spectrometer, such as Figure 1 and Figure 2 As shown, it includes a control module 100, a constant current source circuit 210, a temperature acquisition control circuit 220, a laser module, and a CMOS spectrum acquisition module 300; the control module 100 is respectively connected to the constant current source circuit 210, the temperature acquisition control circuit 220 and the CMOS spectrum acquisition module 300, and the constant current source circuit 210 and the temperature acquisition control circuit 220 are connected to the laser 200 module; the control module 100 outputs a first enable signal to the temperature acquisition control circuit 220 to control the on and off of the temperature acquisition control circuit 220, and the control circuit outputs a second enable signal to the constant current source circuit 210 to control the on and off of the constant current source circuit 210.
[0029] Preferably, the model of the laser 200 is a 785 nm butterfly laser 200 .
[0030] Specifically, the control module 100 collects the temperature of the laser module through the temperature acquisition control circuit 220, controls the temperature change of the laser module, and thus controls the central wavelength of the output laser. The constant current source circuit 210 controls the current output to the laser module, controls the operating power of the laser module, and thus controls the light intensity of the output laser.
[0031] In one embodiment, the temperature acquisition control circuit 220 includes a temperature control circuit 221221 and a temperature control circuit 221, the laser module includes a semiconductor refrigeration chip, a thermistor and a laser 200, the temperature control circuit 221221 is connected to the thermistor, and the semiconductor refrigeration chip is connected to the temperature control circuit 221.
[0032] Specifically, the temperature control circuit 221221 is connected to the thermistor and transmits the collected temperature to the control module 100. The control module 100 controls the temperature of the laser 200 through the temperature control circuit 221, thereby controlling the central wavelength of the output laser. Figure 3 As shown, the pins TEC+ and TEC- of the temperature control circuit 221 chip are connected to the semiconductor refrigeration chip.
[0033] Specifically, if Figure 2and Figure 3 As shown, the pin EN4 of the chip U4 of the temperature control circuit 221 is connected to the control module 100, and receives the first enable signal output by the control module 100. The second enable signal is used to control the opening or closing of the temperature control circuit 221. Figure 4 As shown, the EN5 pin of the chip U6 in the constant current source circuit 210 is connected to the control module 100 and receives the second enable signal output by the control module 100 . The second enable signal controls the opening or closing of the constant current source circuit 210 .
[0034] When the CMOS sensor 320 is not in the spectrum collection state, the control module 100 stops outputting the first and second enable signals to the temperature control circuit 221 and the constant current source circuit 210, thereby shutting down the temperature control circuit 221, the constant current source circuit 210, and the laser module. When the CMOS sensor 320 is in the spectrum collection state, the control module 100 outputs the first and second enable signals to the temperature control circuit 221 and the constant current source circuit 210, thereby turning on the temperature control circuit 221, the constant current source circuit 210, and the laser module. When not in spectrum collection, the control module 100 issues the first and second enable signals to shut down the laser 200, the constant current source circuit 210, and the temperature collection control circuit 220, effectively reducing the power consumption of the CMOS spectrometer.
[0035] In one embodiment, if Figure 5 As shown, the CMOS spectrum collection module 300 includes a driving collection circuit 310 and a CMOS sensor 320 . One end of the driving collection circuit 310 is connected to the control module 100 , and the other end is connected to the CMOS sensor 320 .
[0036] In one embodiment, the low-power CMOS spectrometer is further provided with a first power supply circuit and a second power supply circuit, the input ends of the first power supply circuit and the second power supply circuit are connected to the output end of the control module 100, and the output ends of the first power supply circuit and the second power supply circuit are connected to the input ends of the driving acquisition circuit 310 and the CMOS sensor 320.
[0037] Specifically, the first power supply circuit reduces the +5V voltage to +4.5V and outputs it to the driving and collecting circuit 310 and the CMOS sensor 320. The second power supply circuit reduces the +5V voltage to -4.5V and outputs it to the driving and collecting circuit 310 and the CMOS sensor 320.
[0038] In one embodiment, the first power supply circuit includes a positive LDO module 410, and the control module 100 outputs a third enable signal to the first power supply circuit to control the on / off of the first power supply circuit. Figure 6As shown, pin EN1 of chip U1 of the positive LDO module 410 is connected to the control module 100. The control module 100 outputs a third enable signal to the positive LDO module 410 to control the on / off of the positive LDO module 410, thereby controlling the first power supply circuit to supply power to the driver acquisition circuit 310 and the CMOS sensor 320. When the CMOS sensor 320 begins to acquire spectra, the control module 100 begins to output the third enable signal to the positive LDO module 410, driving the acquisition circuit 310 and the CMOS sensor 320 to begin operation. When the CMOS sensor 320 stops acquiring spectra, the control module 100 stops outputting the third enable signal to the positive LDO module 410, driving the acquisition circuit 310 and the CMOS sensor 320 to cease operation.
[0039] In one embodiment, the second power supply circuit includes a negative voltage DC-DC module 420 and a negative LDO module 430. One end of the negative voltage DC-DC module 420 is connected to the control module 100, and the other end is connected to the negative LDO module 430. The control module 100 outputs a fourth enable signal to the negative voltage DC-DC module 420 to control the on / off switching of the negative voltage DC-DC module 420. The input end of the negative LDO module 430 is connected to the control module 100 and the output end of the negative voltage DC-DC module 420. The output end of the negative LDO is connected to the drive acquisition circuit 310 and the CMOS sensor 320. The control module 100 outputs a fifth enable signal to the negative LDO module 430.
[0040] Specifically, if Figure 7 As shown, the pin EN2 of the chip U2 of the negative pressure DCDC module 420 receives the fourth enable signal of the control module 100 to control the on-off of the negative pressure DCDC module 420, thereby controlling the on-off of the driving acquisition circuit 310 and the CMOS sensor 320; Figure 8 As shown, pin EN3 of chip U3 of the negative LDO module 430 receives the fifth enable signal from the control module 100 to control the on / off of the negative LDO module 430, thereby controlling the on / off of the driver acquisition circuit 310 and the CMOS sensor 320. When the CMOS sensor 320 begins to acquire spectra, the control module 100 begins outputting the fourth and fifth enable signals to the negative voltage DCDC module 420 and the negative LDO module 430, driving the acquisition circuit 310 and the CMOS sensor 320 to begin operation. When the CMOS sensor 320 stops acquiring spectra, the control module 100 stops outputting the fourth and fifth enable signals to the negative voltage DCDC module 420 and the negative LDO module 430, driving the acquisition circuit 310 and the CMOS sensor 320 to cease operation. When not acquiring spectra, the control module 100 issues the third, fourth, and fifth enable signals to shut down the driver acquisition circuit 310 and the CMOS sensor 320, effectively reducing the power consumption of the CMOS spectrometer.
[0041] Preferably, to ensure the portability of the CMOS spectrometer, the control module 100 uses an MCU, and the MCU is also provided with a UART module to facilitate external communication.
[0042] Furthermore, when the control module 100 simultaneously outputs the first to fifth enable signals as described above, the control method is as follows: When the CMOS sensor 320 is in the spectrum collection state, the control module 100 outputs the first to fifth enable signals to power the drive collection circuit 310, the CMOS sensor 320, the constant current source circuit 210, and the temperature collection control circuit 220. When the CMOS is in the non-spectrum collection state, the control module 100 stops outputting the first to fifth enable signals and stops powering the drive collection circuit 310, the CMOS sensor 320, the constant current source circuit 210, and the temperature collection control circuit 220, thereby reducing system power consumption.
[0043] Preferably, the control module 100 provides a timing requirement for the first enable signal to the fifth enable signal. The first enable signal and the second enable signal are first provided to the temperature acquisition control circuit 220 and the constant current source circuit 210 to start the laser 200. After the laser 200 is stable, the third enable signal, the fourth enable signal, and the fifth enable signal are provided to the first power supply circuit and the second power supply circuit to power the drive acquisition circuit 310 and the CMOS sensor 320 and start the spectrum acquisition operation. When shutting down, the control module 100 first stops providing the third enable signal, the fourth enable signal, and the fifth enable signal, first shuts down the drive acquisition circuit 310 and the CMOS sensor 320, and then stops providing the first enable signal and the second enable signal, and the laser 200 stops working.
[0044] Furthermore, when EN1~EN5 are turned off, the MCU can also enter the sleep state through program settings to further reduce power consumption.
[0045] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention may be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background art at the same time. Those skilled in the art should understand that the absence of any content in a claim should not be construed as a limitation on that claim.
[0046] Although this document frequently uses terms such as control module, laser, constant current source circuit, temperature acquisition control circuit, temperature control circuit, CMOS spectrum acquisition module, drive acquisition circuit, CMOS sensor, positive LDO module, negative voltage DC / DC module, and negative LDO module, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention. The terms "first," "second," and so on (if any) in the description and claims of the embodiments of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence.
[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A low-power CMOS spectrometer, characterized in that: It includes a control module, a constant current source circuit, a temperature acquisition control circuit, a laser module, and a CMOS spectrum acquisition module; the control module is connected to the constant current source circuit, the temperature acquisition control circuit, and the CMOS spectrum acquisition module respectively, and the constant current source circuit and the temperature acquisition control circuit are connected to the laser module; The control module outputs a first enable signal to the temperature acquisition control circuit to control the on / off of the temperature acquisition control circuit, and the control module outputs a second enable signal to the constant current source circuit to control the on / off of the constant current source circuit.
2. The low-power CMOS spectrometer according to claim 1, characterized in that: The temperature acquisition control circuit includes a temperature acquisition circuit and a temperature control circuit. The laser module includes a semiconductor refrigeration chip, a thermistor and a laser. The temperature acquisition circuit is connected to the thermistor, and the temperature control circuit is connected to the semiconductor refrigeration chip.
3. The low-power CMOS spectrometer according to claim 1, wherein: The CMOS spectrum collection module includes a driving collection circuit and a CMOS sensor. One end of the driving collection circuit is connected to the control module, and the other end is connected to the CMOS sensor.
4. The low-power CMOS spectrometer according to claim 3, characterized in that: A first power supply circuit and a second power supply circuit are also provided. The input ends of the first power supply circuit and the second power supply circuit are connected to the output end of the control module, and the output ends of the first power supply circuit and the second power supply circuit are connected to the input ends of the drive acquisition circuit and the CMOS sensor.
5. The low-power CMOS spectrometer according to claim 4, characterized in that: The first power supply circuit includes a positive LDO module, and the control module outputs a third enable signal to the first power supply circuit to control the on and off of the first power supply circuit.
6. The low-power CMOS spectrometer according to claim 4, characterized in that: The second power supply circuit includes a negative voltage DCDC module and a negative LDO module.
7. The low-power CMOS spectrometer according to claim 6, characterized in that: One end of the negative pressure DCDC module is connected to the control module, and the other end is connected to the negative LDO module. The control module outputs a fourth enable signal to the negative pressure DCDC module to control the on and off of the negative pressure DCDC module.
8. The low-power CMOS spectrometer according to claim 6, characterized in that: The input end of the negative LDO module is connected to the output end of the control module and the negative voltage DCDC module, the output end of the negative LDO is connected to the drive acquisition circuit and the CMOS sensor, and the control module outputs a fifth enable signal to the negative LDO module.
9. The low-power CMOS spectrometer according to claim 2, characterized in that: The model of the laser is a 785nm butterfly laser.