CN217659856U - Impedance adjusting circuit - Google Patents
Impedance adjusting circuit Download PDFInfo
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- CN217659856U CN217659856U CN202123451039.XU CN202123451039U CN217659856U CN 217659856 U CN217659856 U CN 217659856U CN 202123451039 U CN202123451039 U CN 202123451039U CN 217659856 U CN217659856 U CN 217659856U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses an impedance adjustment circuit, include: the control module is used for continuously outputting different voltage signals to the signal conversion module; the signal conversion module is used for converting the voltage signal into a current signal and transmitting the current signal to the light-emitting module; the light-emitting module is connected with the current signal and emits light; a light receiving module receiving the light emitted from the light emitting module and changing its own impedance according to the intensity of the light; the monitoring device applies detection voltage to the light receiving module; the impedance divides the detection voltage and obtains the divided voltage to the monitoring device, so that the monitoring device detects the respiration rate and forms a respiration curve. This application converts the current signal into for light emitting module to give light emitting module through the different voltage signal of control module continuous output, receives the light that light emitting module sent by light receiving module again, and produces different impedance and simulate and detect in order to supply the guardianship device, and this application provides convenient to the guardianship device, can provide continuous different impedance with the respiratory state of simulation human body.
Description
Technical Field
The utility model relates to an impedance given technical field especially relates to an impedance adjustment circuit.
Background
With the development of the medical industry, life support medical equipment is more abundant and diversified, and particularly, a monitoring device for measuring a respiratory system of a human body, such as a monitor; in the prior art, in a circuit for testing a monitor for measuring the respiration of a human body by a thoracic impedance method, continuous and different impedances which can be adjusted at will cannot be provided for the monitor.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide an impedance adjusting circuit in order to solve the above problems.
An impedance adjusting circuit comprising:
the control module is connected with the signal conversion module and is used for continuously outputting different voltage signals to the signal conversion module;
the signal conversion module is connected with the light-emitting module and used for converting the accessed voltage signal into a current signal and transmitting the current signal to the light-emitting module;
the light-emitting module is connected with the signal conversion module, is accessed to the current signal output by the signal conversion module and emits light; the voltage signals are different, and the intensities of the light emitted by the light emitting modules are different; and
a light receiving module receiving the light emitted from the light emitting module and changing its own impedance according to the intensity of the light; the monitoring device applies detection voltage to the light receiving module; and the plurality of impedances divide the detection voltage to obtain a divided voltage which is sent to the monitoring device.
In one embodiment, the control module is further configured to generate the voltage signal according to an input digital signal;
the control module receives a plurality of the digital signals; different digital signals correspond to different voltage signals; the adjacent digital signals are separated by a preset time; the preset time represents the time length of one breath of the human body.
In one embodiment, the light emitting module further comprises:
and the switching module is connected with the light receiving module, the control module and the monitoring device and is used for switching a signal transmission channel between the monitoring device and the light receiving module under the control of the control module, wherein the signal transmission channel is used for transmitting the detection voltage applied to the light receiving module by the monitoring device.
In one embodiment, the monitoring device changes the detection mode when the switching module switches the signal transmission channel.
In one embodiment, the switching module comprises a gating switch;
the communication end of the gating switch is connected with the communication end of the control module;
the input end of the gating switch is connected with the monitoring device, and the common end of the gating switch is connected with the light receiving module and used for transmitting the detection voltage applied to the light receiving module by the monitoring device.
In one embodiment, the light emitting module includes: and the anode of the light-emitting diode is connected with the current signal, and the cathode of the light-emitting diode is grounded.
In one embodiment, the light receiving module comprises a phototransistor, and a collector of the phototransistor is connected to a common terminal of the switching module.
In one embodiment, the light receiving module further includes: a first resistor and a second resistor;
the first resistor is connected between the collector of the phototriode and the common end of the switching module;
the second resistor is connected between the collector of the phototriode and the common end of the switching module.
In one embodiment, the signal conversion module includes: the first operational amplifier, the second operational amplifier, the third resistor and the fourth resistor;
the non-inverting input end of the first operational amplifier is connected with the voltage signal, and the inverting input end and the non-inverting input end of the first operational amplifier are both connected with the non-inverting input end of the second operational amplifier;
the inverting input end and the output end of the second operational amplifier are both connected with the non-inverting input end of the first operational amplifier;
the third resistor is connected between the output end of the first operational amplifier and the non-inverting input end of the second operational amplifier;
the fourth resistor is connected between the inverting input terminal and the output terminal of the first operational amplifier.
In one embodiment, the signal conversion module further comprises: a fifth resistor;
the fifth resistor is connected to the output end of the second operational amplifier and the non-inverting input end of the first operational amplifier.
Implement the embodiment of the utility model provides a, will have following beneficial effect:
when the monitoring device is subjected to factory detection, the monitoring device simulates a human body, different voltage signals are continuously output to the signal conversion module through the control module, the voltage signals are converted into current signals by the signal conversion module and are applied to the light emitting module, the light emitting module emits light, the light receiving module receives the light emitted by the light emitting module and generates impedance, the impedance generated by the human body during each respiration is simulated, the monitoring device applies detection voltage to the light receiving module, the partial voltage of the partial voltage on the light receiving module is detected at certain time intervals, a respiration curve is formed, comparison with a preset respiration curve is realized, and the detection accuracy of the monitoring device is judged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
FIG. 1 is a block diagram of an impedance adjusting circuit according to an embodiment;
FIG. 2 is a block diagram of an impedance adjusting circuit according to another embodiment;
FIG. 3 is a circuit diagram of a control module in one embodiment;
FIG. 4 is a circuit diagram of a signal conversion module in one embodiment;
fig. 5 is a circuit diagram of a light emitting module, a light receiving module and a switching module according to an embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The application is used for testing the monitoring device which is not put into use, namely a monitor for detecting the respiration of a human body; when a human body breathes, the impedance of a specific part of the human body changes along with the change of breathing, namely, the detected part is equivalent to a resistor with certain impedance; in the prior art, a monitor is connected with different parts of a human body through three wires, wherein one wire is a public end, for example, a wire A is connected with a left arm, a wire B is connected with a left abdomen, and a wire C is connected with a right arm; the monitor can apply voltage to the impedance between the left arm and the left abdomen and the impedance between the right arm and the left abdomen, and the applied voltage can be divided due to the existence of other media, so that the monitor directly collects the divided voltage between the left arm and the left abdomen and the divided voltage between the right arm and the left abdomen, forms a respiration curve according to the obtained divided voltage, and compares the respiration curve with a preset respiration curve to judge the accuracy of the monitor. The main object of the present application is then to provide the monitor with a continuously different impedance to simulate the breathing state of the human body.
Fig. 1 is a block diagram of an impedance adjusting circuit in an embodiment, and with reference to fig. 1, the impedance adjusting circuit includes: a control module 10, a signal conversion module 20, a light emitting module 30 and a light receiving module 40; as shown in fig. 3, which is a circuit diagram of the control module 10, the control module 10 in the present application may be any type of chip or microprocessor, and the control module 10 is connected to the signal conversion module 20 and configured to continuously output different voltage signals to the signal conversion module 20; the signal conversion module 20 is connected to the light emitting module 30, and is configured to convert the accessed voltage signal into a current signal and transmit the current signal to the light emitting module 30; the light emitting module 30 is connected with the signal conversion module 20, and is connected to the current signal output by the signal conversion module 20 and emits light; the intensity of the light emitted by the light emitting module 30 is different according to the voltage signal; the light receiving module 40 receives the light emitted from the light emitting module 30 and changes its own impedance according to the intensity of the light; the monitoring device 50 applies a detection voltage to the light receiving module 40; the impedance divides the detected voltage and provides the divided voltage to the monitoring device 50 to determine the breathing curve.
In one embodiment, the control module 10 is further configured to generate the voltage signal according to an input digital signal; the control module 10 receives a plurality of the digital signals; different digital signals correspond to different voltage signals; the adjacent digital signals are separated by a preset time; the preset time represents the time length of one breath of the human body, and the preset time represents the continuous degree of the impedance change.
Specifically, different digital signals, such as "00", "01", "10", and "11", are respectively written into the control module 10 at preset time intervals through an upper computer or a touch screen, the control module 10 determines a corresponding voltage signal according to each digital signal, sends the voltage signal to the signal conversion module 20 at a preset time, converts the voltage signal into a current signal through the signal conversion module 20, and applies the current signal to the light emitting module 30, the light emitting module 30 emits light with different brightness according to the magnitude of the current signal, and the light receiving module 40 receives the light with different brightness emitted by the light emitting module 30, and then generates impedances with different magnitudes to provide the impedances for the monitoring device.
In one embodiment, as shown in fig. 2, the light emitting module 30 further includes: a switching module 60, connected to the light receiving module 40, the control module 10 and the monitoring device 50, for switching a signal transmission channel between the monitoring device 50 and the light receiving module 40 under the control of the control module 10, where the signal transmission channel is used for transmitting the detection voltage applied by the monitoring device 50 to the light receiving module 40. When the monitoring device 50 switches the signal transmission channel through the switching module 60, the monitoring device 50 changes the detection mode.
Specifically, that is, in the above description, the line a and the line C of the monitoring device are actually used for transmitting the detection voltage to the human body, and the two lines are switched to each other, so that when one line cannot transmit the detection voltage, the other line can be switched to transmit the detection voltage; when the control module 10 sends an instruction to the switching module 60, so that the first output terminal of the impedance varying circuit of the present application, which is connected to the line a, is no longer turned on, that is, the line a cannot apply the detection voltage to the light receiving module 40 through the first output terminal, but is switched to the second output terminal connected to the line C, so that the second output terminal is turned on; at this time, it can be observed whether the monitoring device 50 can still generate a respiration curve, and if so, it is proved that the monitoring device 50 switches the line a and the line C, and the detection voltage transmitted by the line a is switched to the detection voltage transmitted by the line C, and the switching module can be used to test whether the monitoring device 50 has a corresponding switching function.
In one embodiment, as shown in fig. 4, the signal conversion module 20 includes: a first operational amplifier U17A, a second operational amplifier U17B, a third resistor R112, a fourth resistor R118, and a fifth resistor R119; the non-inverting input end of the first operational amplifier U17A is connected to the voltage signal, and the inverting input end and the non-inverting input end of the first operational amplifier U17A are both connected with the non-inverting input end of the second operational amplifier U17B; the inverting input end and the output end of the second operational amplifier U17B are both connected with the non-inverting input end of the first operational amplifier U17A; the third resistor R112 is connected between the output end of the first operational amplifier U17A and the non-inverting input end of the second operational amplifier U17B; the fourth resistor R118 is connected between the inverting input terminal and the output terminal of the first operational amplifier U17A; the fifth resistor R119 is connected to the output terminal of the second operational amplifier U17B and the non-inverting input terminal of the first operational amplifier U17A.
In one embodiment, as shown in fig. 5, the light emitting module 30 includes: and the anode of the light-emitting diode D20 is connected with the current signal, and the cathode of the light-emitting diode D20 is grounded.
In one embodiment, as shown in fig. 5, the light receiving module 40 includes a phototransistor Q1, and a collector of the phototransistor Q1 is connected to the common terminal of the switching module 60.
In one embodiment, as shown in fig. 5, the light receiving module 40 further includes: a first resistor R289 and a second resistor R290; the first resistor R289 is connected between the collector of the phototransistor Q1 and the common terminal of the switching module 60; the second resistor R290 is connected between the collector of the phototransistor Q1 and the common terminal of the switching module 60.
In one embodiment, the switching module 60 includes a gate switch U18; the communication end of the gating switch U18 is connected with the communication end of the control module 10; the input end of the gating switch U18 is connected to the monitoring device 50, and the common end of the gating switch U18 is connected to the light receiving module 40 and is used for transmitting the detection voltage applied to the light receiving module 40 by the monitoring device 50.
The specific working principle is as follows: the signal output end V _ WAVE of the control module 10 outputs the voltage signal to the non-inverting input end of the first operational amplifier U17A, the voltage signal is amplified by the first operational amplifier U17A and then output to the second operational amplifier U17B, and the second operational amplifier U17B outputs a current signal by combining the third resistor R112, the fourth resistor R118, and the fifth resistor R119. The function of the signal conversion module 20 is implemented by a constant current source circuit, and the working principle of the signal conversion module is the same as that of the constant current source circuit, which is not described in detail herein.
The anode of the light emitting diode D20 is connected with the current signal to emit light, and the phototriode Q1 changes the impedance value of the phototriode Q1 after receiving the light emitted by the light emitting diode D20 so as to realize the simulation of the human body impedance. At the moment, the monitoring device applies detection voltage to the phototriode Q1, detects the voltage value of the reagent after the voltage is divided, forms a respiration curve, compares the respiration curve with a preset respiration curve, and judges the measurement accuracy of the monitoring device.
The control module 10 sends switching instructions to the input terminals TT _ B1 and TT _ A1 of the gating switch U18 through the communication terminals USART _ RX and USART _ TX thereof, so that the gating switch U18 switches the channel of the transmission detection voltage thereof, and the switching module can be used for testing whether the monitoring device 50 has a corresponding switching function.
Implement the embodiment of the utility model provides a, will have following beneficial effect:
when the monitoring device is subjected to factory detection, the monitoring device simulates a human body, different voltage signals are continuously output to the signal conversion module through the control module, the voltage signals are converted into current signals by the signal conversion module and applied to the light emitting module, the light emitting module emits light, the light receiving module receives the light emitted by the light emitting module and generates impedance, the impedance generated by the human body during each respiration is simulated, the monitoring device applies detection voltage to the light receiving module, the divided voltage divided onto the light receiving module is detected at certain time intervals, a respiration curve is formed, comparison with a preset respiration curve is achieved, and the detection accuracy of the monitoring device is judged.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. An impedance adjusting circuit, comprising:
the control module is connected with the signal conversion module and is used for continuously outputting different voltage signals to the signal conversion module;
the signal conversion module is connected with the light-emitting module and used for converting the accessed voltage signal into a current signal and transmitting the current signal to the light-emitting module;
the light emitting module is connected with the signal conversion module, is accessed to the current signal output by the signal conversion module and emits light; the voltage signals are different, and the intensity of light emitted by the light emitting modules is different; and
a light receiving module receiving the light emitted from the light emitting module and changing its own impedance according to the intensity of the light; the monitoring device applies detection voltage to the light receiving module; the impedance divides the detection voltage and obtains the divided voltage to the monitoring device.
2. The impedance adjusting circuit of claim 1,
the control module is also used for generating the voltage signal according to the input digital signal;
the control module receives a plurality of the digital signals; different digital signals correspond to different voltage signals; the adjacent digital signals are separated by a preset time; a plurality of the preset times represent the time length of one breath of the human body.
3. The impedance adjusting circuit of claim 1, wherein the light emitting module further comprises:
and the switching module is connected with the light receiving module, the control module and the monitoring device and is used for switching a signal transmission channel between the monitoring device and the light receiving module under the control of the control module, wherein the signal transmission channel is used for transmitting the detection voltage applied to the light receiving module by the monitoring device.
4. The impedance adjusting circuit of claim 3,
when the monitoring device switches the signal transmission channel through the switching module, the monitoring device changes the detection mode.
5. The impedance adjusting circuit of claim 3,
the switching module comprises a gating switch;
the communication end of the gating switch is connected with the communication end of the control module;
the input end of the gating switch is connected with the monitoring device, and the common end of the gating switch is connected with the light receiving module and used for transmitting the detection voltage applied to the light receiving module by the monitoring device.
6. The impedance adjusting circuit of claim 1,
the light emitting module includes: and the anode of the light-emitting diode is connected with the current signal, and the cathode of the light-emitting diode is grounded.
7. The impedance adjusting circuit of claim 3,
the light receiving module comprises a phototriode, and a collector of the phototriode is connected with a common end of the switching module.
8. The impedance adjusting circuit according to claim 7, wherein the light receiving module further comprises: a first resistor and a second resistor;
the first resistor is connected between the collector of the phototriode and the common end of the switching module;
the second resistor is connected between the collector of the phototriode and the common end of the switching module.
9. The impedance adjustment circuit of claim 2, wherein the signal conversion module comprises: the first operational amplifier, the second operational amplifier, the third resistor and the fourth resistor;
the non-inverting input end of the first operational amplifier is connected with the voltage signal, and the inverting input end and the non-inverting input end of the first operational amplifier are both connected with the non-inverting input end of the second operational amplifier;
the inverting input end and the output end of the second operational amplifier are both connected with the non-inverting input end of the first operational amplifier;
the third resistor is connected between the output end of the first operational amplifier and the non-inverting input end of the second operational amplifier;
the fourth resistor is connected between the inverting input terminal and the output terminal of the first operational amplifier.
10. The impedance adjustment circuit of claim 9, wherein the signal conversion module further comprises: a fifth resistor;
the fifth resistor is connected to the output end of the second operational amplifier and the non-inverting input end of the first operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123451039.XU CN217659856U (en) | 2021-12-31 | 2021-12-31 | Impedance adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123451039.XU CN217659856U (en) | 2021-12-31 | 2021-12-31 | Impedance adjusting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN217659856U true CN217659856U (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123451039.XU Active CN217659856U (en) | 2021-12-31 | 2021-12-31 | Impedance adjusting circuit |
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| CN (1) | CN217659856U (en) |
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2021
- 2021-12-31 CN CN202123451039.XU patent/CN217659856U/en active Active
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