CN204092031U - A kind of ultrasonic fetal gage - Google Patents
A kind of ultrasonic fetal gage Download PDFInfo
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- CN204092031U CN204092031U CN201420420482.1U CN201420420482U CN204092031U CN 204092031 U CN204092031 U CN 204092031U CN 201420420482 U CN201420420482 U CN 201420420482U CN 204092031 U CN204092031 U CN 204092031U
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Abstract
This application provides a kind of ultrasonic fetal gage, this ultrasonic fetal gage is provided with under-voltage prompt system, and this is under-voltage, and prompt system comprises reference voltage circuit, bleeder circuit, comparison circuit and cue circuit.Reference voltage circuit is used for providing reference voltage; Bleeder circuit is used for carrying out dividing potential drop to the output voltage of the battery of ultrasonic fetal gage, exports the voltage to be measured changed with this output voltage equal proportion; Comparison circuit is used for voltage to be measured and reference voltage being compared, when voltage to be measured is lower than exporting under-voltage signal during reference voltage; Cue circuit is used for when comparison circuit exports under-voltage signal, utilizes this under-voltage signal to make under-voltage prompting to user.Because this ultrasonic fetal gage being provided with can make the under-voltage prompt system of under-voltage prompting to user, so can work as cell voltage not enough time make prompting to user, thus existing ultrasonic fetal gage can be solved because cannot make to user when cell voltage is not enough and point out and the not good problem of the Consumer's Experience that causes.
Description
Technical field
The application relates to technical field of medical instruments, more particularly, relates to a kind of ultrasonic fetal gage.
Background technology
Ultrasonic fetal gage is widely used in medical institutions, family and individual as a kind of portable medical electronic machine, and on the basis ensureing instrument safety, raising stability and practicality have extremely important meaning for being used in.Due to portable requirement, ultrasonic fetal gage generally uses battery as the energy, when cell voltage is not enough, there will be the bad phenomenon such as the little or jitter of volume, because existing ultrasonic fetal gage cannot pilot cell undertension, so user does not know because of cell voltage reason or other faults cause these phenomenons, would not change battery in time yet or charge to eliminate these bad phenomenon in time, Consumer's Experience is not good.
Utility model content
In view of this, the application provides a kind of ultrasonic fetal gage, for making prompting when cell voltage is not enough to user, and the problem that the Consumer's Experience caused because of making prompting to user when cell voltage is not enough to solve existing ultrasonic fetal gage is not good.
To achieve these goals, the existing scheme proposed is as follows:
A kind of ultrasonic fetal gage, be provided with under-voltage prompt system, described under-voltage prompt system comprises:
For the reference voltage circuit of output reference voltage;
Output voltage for the battery according to described ultrasonic fetal gage exports the bleeder circuit of the voltage to be measured becoming preset ratio with described output voltage;
Be connected with described reference voltage circuit, described bleeder circuit respectively, for the comparison circuit compared described reference voltage and described voltage to be measured, described comparison circuit is configured to when described voltage to be measured is lower than exporting under-voltage signal during described reference voltage;
Be connected with described comparison circuit, for making the cue circuit of under-voltage prompting to user according to described under-voltage signal.
Preferably, described reference voltage circuit comprises:
Pull-up resistor, its one end is connected with the positive pole of described battery;
Zener diode, its negative pole is connected with the other end of described pull-up resistor, plus earth;
The negative pole of described Zener diode is as the signal output part of described reference voltage circuit.
Preferably, described Zener diode is pressure-adjustable Zener diode;
The control end of described pressure-adjustable Zener diode is connected with negative pole.
Preferably, described bleeder circuit comprises:
First divider resistance, its one end is connected with the positive pole of described battery, and the other end is as the signal output part of described bleeder circuit;
Second divider resistance, its one end is connected with the other end of described first divider resistance, other end ground connection.
Preferably, described comparison circuit comprises:
First input resistance, one end is connected with the signal output part of described reference voltage circuit;
Second input resistance, one end is connected with the signal output part of described bleeder circuit;
Comparator, its positive input is connected with the other end of described first input resistance, reverse input end is connected with the other end of described second input resistance, and its outfan is as the signal output part of described comparison circuit, and its high level exported is configured to described under-voltage signal.
Preferably, described cue circuit comprises:
Light emitting diode, its positive pole is connected with the positive pole of described battery;
Current-limiting resistance, one end is connected with the negative pole of described light emitting diode;
First audion, its colelctor electrode is connected with the other end of described current-limiting resistance, grounded emitter;
3rd input resistance, one end is connected with the base stage of described first audion, and the other end is connected with the signal output part of described comparison circuit.
Preferably, also comprise:
For the on-off control circuit of the output of the heartbeat signal of ultrasonic fetal gage according to described under-voltage signal blocker.
Preferably, described on-off control circuit comprises:
Second audion, colelctor electrode is connected at the signal input part of gain module with the power amplifier of described ultrasonic fetal gage, grounded emitter;
4th input resistance, one end is connected with the base stage of described second audion, the other end is connected with the signal output part of described comparison circuit.
Preferably, also comprise:
For controlling the voltage control circuit of described voltage zero to be measured according to described under-voltage signal.
Preferably, described voltage control circuit comprises:
3rd audion, colelctor electrode is connected with the signal output part of described bleeder circuit, grounded emitter;
5th input resistance, one end is connected with the base stage of described 3rd audion, and the other end is connected with the signal output part of described comparison circuit.
Filter capacitor, between the base stage being connected to described 3rd audion and emitter stage.
As can be seen from technique scheme, this application provides a kind of ultrasonic fetal gage, this ultrasonic fetal gage is provided with under-voltage prompt system, and this is under-voltage, and prompt system comprises reference voltage circuit, bleeder circuit, comparison circuit and cue circuit.Reference voltage circuit is used for providing reference voltage; Bleeder circuit is used for carrying out dividing potential drop to the output voltage of the battery of ultrasonic fetal gage, exports the voltage to be measured changed with this output voltage equal proportion; Comparison circuit is used for voltage to be measured and reference voltage being compared, when voltage to be measured is lower than exporting under-voltage signal during reference voltage; Cue circuit is used for when comparison circuit exports under-voltage signal, utilizes this under-voltage signal to make under-voltage prompting to user.Because this ultrasonic fetal gage being provided with can make the under-voltage prompt system of under-voltage prompting to user, so can work as cell voltage not enough time make prompting to user, thus existing ultrasonic fetal gage can be solved because cannot make to user when cell voltage is not enough and point out and the not good problem of the Consumer's Experience that causes.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structure chart of a kind of ultrasonic fetal gage that Fig. 1 provides for the embodiment of the present application;
The circuit diagram of the under-voltage prompt system of the ultrasonic fetal gage that Fig. 2 provides for the present embodiment;
The circuit diagram of a kind of under-voltage prompt system of the ultrasonic fetal gage that Fig. 3 provides for another embodiment of the application;
The circuit diagram of a kind of under-voltage prompt system of the ultrasonic fetal gage that Fig. 4 provides for the another embodiment of the application.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Embodiment one
The structure chart of a kind of ultrasonic fetal gage that Fig. 1 provides for the embodiment of the present application.
As shown in Figure 1, the ultrasonic fetal gage 100 that the present embodiment provides is provided with under-voltage prompt system 10, and this is under-voltage, and prompt system 10 comprises reference voltage circuit 11, bleeder circuit 12, comparison circuit 13 and cue circuit 14.
Reference voltage circuit 11 is for providing stable reference voltage, and using the benchmark compared as the output voltage VBAT of comparison circuit 13 pairs of batteries 20, reference voltage circuit 11 exports this reference voltage from its signal output part.
Bleeder circuit 12 carries out dividing potential drop for the output voltage of the battery 20 to ultrasonic fetal gage 100, and to export the voltage to be measured changed with this output voltage equal proportion, bleeder circuit 12 exports this voltage to be measured from its signal output part 121.
Comparison circuit 13 is connected with reference voltage circuit 11, bleeder circuit 12 respectively, for voltage to be measured and reference voltage being compared, when voltage to be measured exports under-voltage signal lower than during this reference voltage.
Cue circuit 14 is connected with comparison circuit 13.When voltage to be measured is lower than reference voltage, when namely comparison circuit 13 exports under-voltage signal, optical signal is utilized to make under-voltage prompting to user according to this under-voltage signal.
As can be seen from technique scheme, present embodiments provide a kind of ultrasonic fetal gage, this ultrasonic fetal gage is provided with under-voltage prompt system, and this is under-voltage, and prompt system comprises reference voltage circuit, bleeder circuit, comparison circuit and cue circuit.Reference voltage circuit is used for providing reference voltage; Bleeder circuit is used for carrying out dividing potential drop to the output voltage of the battery of ultrasonic fetal gage, exports the voltage to be measured changed with this output voltage equal proportion; Comparison circuit is used for voltage to be measured and reference voltage being compared, when voltage to be measured is lower than exporting under-voltage signal during reference voltage; Cue circuit is used for when comparison circuit exports under-voltage signal, utilizes this under-voltage signal to make under-voltage prompting to user.Because this ultrasonic fetal gage being provided with can make the under-voltage prompt system of under-voltage prompting to user, so can work as cell voltage not enough time make prompting to user, thus existing ultrasonic fetal gage can be solved because cannot make to user when cell voltage is not enough and point out and the not good problem of the Consumer's Experience that causes.
The circuit diagram of the under-voltage prompt system of the ultrasonic fetal gage that Fig. 2 provides for the present embodiment.
The technical scheme implemented the application easily to enable those skilled in the art and provide, should the concrete structure of under-voltage prompt system be described in detail below, specifically shown in Figure 2.
Reference voltage 11 circuit comprises pull-up resistor R1 and Zener diode D1.The negative pole that pull-up resistor R1 is connected with the positive pole VBAT of the battery of ultrasonic fetal gage, the other end is connected zener diode D1, the plus earth of Zener diode D1.It should be noted that, the Zener diode D1 of the present embodiment selects pressure-adjustable Zener diode, and the negative pole of this pressure-adjustable Zener diode is directly connected with its control end, and as the signal output part of this reference voltage circuit 11, to export this reference voltage.The voltage of voltage regulation of this pressure-adjustable Zener diode is 2.5 volts.
Bleeder circuit 12 comprises the first divider resistance R2 and the second divider resistance R3 that are cascaded.One end of first divider resistance R2 is for connecting the positive pole VBAT of the battery of ultrasonic fetal gage, and the other end is connected with one end of the second divider resistance R3, and as the signal output part 121 of this bleeder circuit 12, for exporting this voltage to be measured; The other end ground connection of the second divider resistance R3.
Comparison circuit 13 comprises the first input resistance R4, the second input resistance R5 and comparator D2.First input resistance R5 is connected with the signal input part of reference voltage circuit 11, and for receiving reference voltage, the other end is connected with the positive input of comparator D2; One end of second input resistance R5 is connected with the signal output part 121 of bleeder circuit 13, the other end is connected with the reverse input end of comparator D2; The outfan of comparator D2 is as the signal output part of comparison circuit 13, when cell voltage is in normal condition, when namely can meet the work of ultrasonic fetal gage, voltage to be measured higher than reference voltage, the outfan output low level of comparator D2, on the contrary, when cell voltage is not enough, voltage to be measured is lower than reference voltage, and at this moment comparator D2 exports high level, and the high level that therefore in the present embodiment, comparator D2 exports is as under-voltage signal.
Cue circuit 14 comprises light emitting diode D3, current-limiting resistance R6, the first audion K1 and the 3rd input resistance R7.The positive pole of light emitting diode D3 is connected with the positive pole VBAT of the battery of ultrasonic fetal gage, negative pole is connected with one end of current-limiting resistance R6; The other end of current-limiting resistance R6 is connected with the colelctor electrode of the first audion K1, the preferred NPN type triode of the first audion K1, its grounded emitter; One end of 3rd input resistance R7 is connected with the signal output part of comparison circuit 13, the other end is connected with the base stage of the first audion K3.
When comparison circuit 13 export under-voltage signal, namely high level time, the first audion K1 conducting, electric current flows through light emitting diode D3, light emitting diode D3 emits beam, thus prompting user changes battery, or charge in time when battery is chargeable battery, in order to avoid impact uses.
Embodiment two
The circuit diagram of a kind of under-voltage prompt system of the ultrasonic fetal gage that Fig. 3 provides for another embodiment of the application.
As shown in Figure 3, the under-voltage prompt system that the present embodiment provides be the under-voltage prompt system provided in a upper embodiment basis on set up on-off control circuit 15.This on-off control circuit 15 comprises the second audion K2 and the 4th input resistance R8.
The preferred NPN type triode of second audion K2, its colelctor electrode is connected with the signal input part 31 of the power amplifier gain module 30 of ultrasonic fetal gage, grounded emitter; One end of 4th input resistance R8 is connected with the signal output part of comparison circuit 13, the other end is connected with the base stage of the second audion K2.
When comparison circuit 13 exports under-voltage signal and high level, second audion K2 conducting, by signal input part 31 ground connection of the power amplifier gain module 30 of ultrasonic fetal gage, also the transmission of heartbeat signal has just been blocked, thus the speaker of ultrasonic fetal gage can be stoped to send unstable sound, until could normally work after changing battery or charging, improve the experience of user from another point of view.
Embodiment three
The circuit diagram of a kind of under-voltage prompt system of the ultrasonic fetal gage that Fig. 4 provides for the another embodiment of the application.
As shown in Figure 4, the under-voltage prompt system that the present embodiment provides has set up voltage control circuit 16 on the basis of a upper embodiment.Voltage control circuit 16 comprises the 3rd audion K3, the 5th input resistance R9 and filter capacitor C.
One end of 5th input resistance R9 is connected with the signal output part of comparison circuit 13, the other end is connected with the base line of the 3rd audion K3; The preferred NPN type triode of 3rd audion K3, its colelctor electrode is connected with the signal input part 121 of bleeder circuit 12, grounded emitter; Between the base stage that filter capacitor C is connected to the 3rd triode K3 and emitter stage.
When comparison circuit 13 exports under-voltage signal and high level, 3rd audion K3 conducting, the signal output part 121 of bleeder circuit 12 is forced ground connection, if cell voltage slightly fluctuates also would not affect the Output rusults of comparison circuit 13, thus ensures to make stable under-voltage prompting to user.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the application.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a ultrasonic fetal gage, is characterized in that, is provided with under-voltage prompt system, and described under-voltage prompt system comprises:
For the reference voltage circuit of output reference voltage;
Output voltage for the battery according to described ultrasonic fetal gage exports the bleeder circuit of the voltage to be measured becoming preset ratio with described output voltage;
Be connected with described reference voltage circuit, described bleeder circuit respectively, for the comparison circuit compared described reference voltage and described voltage to be measured, described comparison circuit is configured to when described voltage to be measured is lower than exporting under-voltage signal during described reference voltage;
Be connected with described comparison circuit, for making the cue circuit of under-voltage prompting to user according to described under-voltage signal.
2. ultrasonic fetal gage as claimed in claim 1, is characterized in that, described reference voltage circuit comprises:
Pull-up resistor, its one end is connected with the positive pole of described battery;
Zener diode, its negative pole is connected with the other end of described pull-up resistor, plus earth;
The negative pole of described Zener diode is as the signal output part of described reference voltage circuit.
3. ultrasonic fetal gage as claimed in claim 2, is characterized in that, described Zener diode is pressure-adjustable Zener diode;
The control end of described pressure-adjustable Zener diode is connected with negative pole.
4. ultrasonic fetal gage as claimed in claim 1, is characterized in that, described bleeder circuit comprises:
First divider resistance, its one end is connected with the positive pole of described battery, and the other end is as the signal output part of described bleeder circuit;
Second divider resistance, its one end is connected with the other end of described first divider resistance, other end ground connection.
5. ultrasonic fetal gage as claimed in claim 1, is characterized in that, described comparison circuit comprises:
First input resistance, one end is connected with the signal output part of described reference voltage circuit;
Second input resistance, one end is connected with the signal output part of described bleeder circuit;
Comparator, its positive input is connected with the other end of described first input resistance, reverse input end is connected with the other end of described second input resistance, and its outfan is as the signal output part of described comparison circuit, and its high level exported is configured to described under-voltage signal.
6. ultrasonic fetal gage as claimed in claim 1, is characterized in that, described cue circuit comprises:
Light emitting diode, its positive pole is connected with the positive pole of described battery;
Current-limiting resistance, one end is connected with the negative pole of described light emitting diode;
First audion, its colelctor electrode is connected with the other end of described current-limiting resistance, grounded emitter;
3rd input resistance, one end is connected with the base stage of described first audion, and the other end is connected with the signal output part of described comparison circuit.
7. the ultrasonic fetal gage as described in any one of claim 1 ~ 6, is characterized in that, also comprise:
For the on-off control circuit of the output of the heartbeat signal of ultrasonic fetal gage according to described under-voltage signal blocker.
8. ultrasonic fetal gage as claimed in claim 7, is characterized in that, described on-off control circuit comprises:
Second audion, colelctor electrode is connected at the signal input part of gain module with the power amplifier of described ultrasonic fetal gage, grounded emitter;
4th input resistance, one end is connected with the base stage of described second audion, the other end is connected with the signal output part of described comparison circuit.
9. ultrasonic fetal gage as claimed in claim 8, is characterized in that, also comprise:
For controlling the voltage control circuit of described voltage zero to be measured according to described under-voltage signal.
10. ultrasonic fetal gage as claimed in claim 9, is characterized in that, described voltage control circuit comprises:
3rd audion, colelctor electrode is connected with the signal output part of described bleeder circuit, grounded emitter;
5th input resistance, one end is connected with the base stage of described 3rd audion, and the other end is connected with the signal output part of described comparison circuit;
Filter capacitor, between the base stage being connected to described 3rd audion and emitter stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420420482.1U CN204092031U (en) | 2014-07-28 | 2014-07-28 | A kind of ultrasonic fetal gage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420420482.1U CN204092031U (en) | 2014-07-28 | 2014-07-28 | A kind of ultrasonic fetal gage |
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| CN204092031U true CN204092031U (en) | 2015-01-14 |
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| CN201420420482.1U Active CN204092031U (en) | 2014-07-28 | 2014-07-28 | A kind of ultrasonic fetal gage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112639497A (en) * | 2019-11-29 | 2021-04-09 | 深圳市大疆创新科技有限公司 | Battery detection circuit, battery detection method, battery, electronic device and storage medium |
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2014
- 2014-07-28 CN CN201420420482.1U patent/CN204092031U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112639497A (en) * | 2019-11-29 | 2021-04-09 | 深圳市大疆创新科技有限公司 | Battery detection circuit, battery detection method, battery, electronic device and storage medium |
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Address after: 518102 Guangdong, Baoan District, Fuyong, Xintian street, 71-4 Avenue, building D on the ground floor of the 7, eighth, 9, and the 10 floor of the eastern side of the road Patentee after: Shenzhen medical Polytron Technologies Inc Address before: 518102 Guangdong, Baoan District, Fuyong, Xintian street, 71-4 Avenue, building D on the ground floor of the 7, eighth, 9, and the 10 floor of the eastern side of the road Patentee before: Shenzhen Jumper Medical Equipment Co., Ltd. |