CN209419270U - A kind of power source special of Portable toxicity instrument - Google Patents
A kind of power source special of Portable toxicity instrument Download PDFInfo
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- CN209419270U CN209419270U CN201920167619.XU CN201920167619U CN209419270U CN 209419270 U CN209419270 U CN 209419270U CN 201920167619 U CN201920167619 U CN 201920167619U CN 209419270 U CN209419270 U CN 209419270U
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Abstract
The utility model discloses a kind of power source specials of Portable toxicity instrument, circuit board including shell and setting inside the shell, the circuit board includes charging inlet circuit, lithium battery group, electric quantity display circuit and voltage follower circuit, the output end of the charging inlet circuit is connect with lithium battery group input terminal, first output end of the lithium battery group and the input terminal of electric quantity display circuit connect, the second output terminal of the lithium battery group and the input terminal of voltage follower circuit connect, and the output voltage of the voltage follower circuit is 10.8V-12.6V.The utility model uses dedicated mobile power source for the power supply of toxicity instrument, since the capacitance of lithium battery group is far longer than the capacity of battery, increase the sample size disposably detected, greatly reduce the consumption of expensive detection reagent, detection time is greatly decreased, working efficiency is effectively improved, can be widely applied to power technique fields.
Description
Technical field
The utility model relates to power technique fields, especially a kind of power source special of Portable toxicity instrument.
Background technique
Water source burst pollution is the matters of aggravation paid close attention to jointly in the world, and the existence for being related to the mankind threatens and health peace
Entirely.Suddenly accident occurs repeatedly in China in recent years, when coping with water source burst pollution, implements effective drinking water treatment
Emergency preplan is to ensure the important measures of drinking water quality safety, and " bio-toxicity " detection is even more the essential finger of Emergent detection
Mark property project.Portable toxicity detector is the detecting instrument of " bio-toxicity " project, other than daily detection indoors, even more
Shoulder the vital task of outgoing Emergent detection.When Portable toxicity detector goes out to detect, due to the limitation of field condition, base
Originally it is not available fixed AC power source, No. three batteries of 6 section need to be used, since the electricity of battery is limited, No. three batteries of every batch of are big
10 samples can generally be detected；When a large amount of sample need to be detected, it must just shut down and replace battery and re-start detection, however weight every time
New booting detection requires the reagent blank that re-synchronization does same batch water sample, needs to cultivate photogen, the training of photogen again
The feeding time need to be strict controlled in 15 minutes, accurately control with the water sample reaction time at 5 minutes, except a large amount of expensive prices of consuming
Reagent, also increase detection time, substantially reduce working efficiency.In addition, due to the voltage requirement of Portable toxicity detector, only
There is the battery of a small number of models to be just suitable for Portable toxicity detector, it is active in outdoor application to significantly reduce instrument
Property.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is that: provide a kind of capacitance be exclusively used in more greatly it is portable
The power supply of formula toxicity instrument.
Technical solution adopted in the utility model is:
A kind of power source special of Portable toxicity instrument, the circuit board including shell and setting inside the shell, the circuit board
Including charging inlet circuit, lithium battery group, electric quantity display circuit and voltage follower circuit, the output end of the charging inlet circuit
It is connect with lithium battery group input terminal, the first output end of the lithium battery group and the input terminal of electric quantity display circuit connect, described
The second output terminal of lithium battery group and the input terminal of voltage follower circuit connect, and the output voltage of the voltage follower circuit is
10.8V-12.6V。
Further, the voltage follower circuit includes the first chip, the second chip, first resistor, second resistance and first
Capacitor；
The second output terminal of one end and lithium battery group of the first resistor anode connection, the first resistor it is another
End is connected by the cathode of first capacitor and the second output terminal of lithium battery group, the tie point of the first resistor and first capacitor
It is connect with the 5th pin of the first chip, the third pin of first chip is connect with the 5th pin of the second chip, described
First pin of the first chip is connect with the 4th pin of the second chip, the second pin of first chip and second resistance
One end connection, the cathode of the other end of the second resistance as the output end of voltage follower circuit, the of second chip
Two pins and third pin are connected to the cathode of the second output terminal of lithium battery group, the 7th pin of second chip and
Eight pins are connected to the cathode of the output end of voltage follower circuit.
Further, the electric quantity display circuit includes third chip, 3rd resistor, the 4th resistance, the 5th resistance, the 6th electricity
Resistance, the 7th resistance and the first LED light, the second LED light, third LED light, the 4th LED light and the 5th LED light；
First pin of the third chip is connect by 3rd resistor with the cathode of the first LED light, the third chip
Second pin connect with the cathode of the second LED light by the 4th resistance, it is electric that the third pin of the third chip passes through the 5th
Resistance is connect with the cathode of third LED light, and the 4th pin of third chip is connect by the 6th resistance with the cathode of the 4th LED light,
5th pin of third chip is connect by the 7th resistance with the cathode of the 5th LED light, third chip ground the 6th pin, the
The anode of one LED light, the anode of the second LED light, the anode of third LED light, the anode of the 4th LED light and the 5th LED light are just
Extremely it is connect with the anode of the first output end of lithium battery group.
Further, the battery capacity of the lithium battery group is 10Ah.
Further, the lithium battery group uses poly-lithium battery.
The beneficial effects of the utility model are: the utility model uses dedicated mobile power source for the power supply of toxicity instrument, due to
The capacitance of lithium battery group is far longer than the capacity of battery, therefore the sample disposably detected is increased by using the power supply power supply
Quantity greatly reduces the consumption of expensive detection reagent, detection time is greatly decreased, effectively improves working efficiency.In addition, moving
The dynamic chargeable recycling of power supply, No. three batteries of relative usage more meet energy-saving and environment friendly requirement.
Detailed description of the invention
Fig. 1 is a kind of overall structure block diagram of the circuit board of the power source special of Portable toxicity instrument of the utility model；
Fig. 2 is the electronic circuitry of voltage follower circuit in specific embodiment；
Fig. 3 is the electronic circuitry of electric quantity display circuit in specific embodiment.
Specific embodiment
Referring to Fig.1, the present embodiment provides a kind of power source specials of Portable toxicity instrument, including shell and setting are inside the shell
Circuit board, the circuit board includes charging inlet circuit, lithium battery group, electric quantity display circuit and voltage follower circuit, described
The output end of charging inlet circuit is connect with lithium battery group input terminal, the first output end and electricity the display electricity of the lithium battery group
The input terminal on road connects, and the second output terminal of the lithium battery group and the input terminal of voltage follower circuit connect, and the voltage is defeated
The output voltage of circuit is 10.8V-12.6V out.
The charging inlet circuit is for charging the voltage input lithium battery group that adapter provides, the charging
The voltage of mouth electricity input is 12.6V (DC)；The voltage of the adapter access are as follows: 100-240V (AC), input current frequency are as follows:
50/60Hz, the voltage of output are as follows: 12.6V (DC) exports electric current: 1.5A.The lithium battery group is used to store electric energy, and in poison
Property instrument work when, to toxicity instrument convey power supply, the lithium battery group use existing lithium battery group, it is similar be similar to smart phone electricity
Pond, capacitance differ between 1-15Ah.The electric quantity display circuit is used to show the electricity surplus of lithium battery group, the electricity
Amount display circuit can be used LED screen and show, can also pass through LED light classification display.The voltage follower circuit is used for poison
Property instrument output voltage, while circuit board starting protection is acted on, the voltage of voltage follower circuit output is 10.8V-
12.6V guarantees the work of toxicity instrument in stable working condition.
Referring to Fig. 2, it is further used as preferred embodiment, the voltage follower circuit includes the first chip U1, second
Chip U2, first resistor R1, second resistance R2 and first capacitor C1；
The positive B+ connection of the second output terminal of one end and lithium battery group of the first resistor R1, the first resistor R1
Cathode B- connection of the other end by the second output terminal of first capacitor C1 and lithium battery group, the first resistor R1 and first
The tie point of capacitor C1 is connect with the 5th pin VDD of the first chip U1, the third pin Cout of the first chip U1 and
The 5th pin G2 connection of two chip U2, the 4th pin G1 of the first pin Dout and the second chip U2 of the first chip U1
Connection, the second pin V- of the first chip U1 are connect with one end of second resistance R2, the other end of the second resistance R2
The second pin and third pin of the cathode P-, the second chip U2 of output end as voltage follower circuit are connected to lithium
The 7th pin and the 8th pin of the cathode B-, the second chip U2 of the second output terminal of battery pack are connected to voltage output
The cathode P- of the output end of circuit.
In the present embodiment, the first chip U1 uses chip model for the chip of DW01, and the second chip U2 is adopted
The chip for being 8205A with chip model.When the working principle of voltage follower circuit electric discharge are as follows: when the voltage of lithium battery group is in 12V
When neighbouring, the first foot, the third foot of the first chip U1 exports high level (being equal to supply voltage), and crus secunda voltage is 0V.This
When the first chip U1 the first foot, third foot voltage will be added separately to the 4th pin and the 5th pin of the second chip U2, second
Two electronic switches in chip U2 are on state because its grid is connected to the voltage from the first chip U1, i.e., and two
A electronic switch is in open state.The end P- of the cathode with voltage follower circuit of lithium battery group, which is equivalent to, at this time is directly connected to,
Voltage follower circuit has voltage output.
When lithium battery group charging, the working principle of voltage follower circuit are as follows: when lithium battery group is normally filled by charger
When electric, with the increase in charging time, the voltage of lithium battery group will be higher and higher, when lithium battery group voltage is increased to about 11V,
First chip U1 will be considered to lithium battery group voltage and be in overcharge voltage state, soon disconnect the output electricity of third pin
Pressure, so that the voltage of third pin is become 0V, the switching tube in the second chip U2 because the 4th pin no-voltage due to close.Lithium electricity at this time
It is in an off state between the cathode of pond group and the cathode of voltage follower circuit.I.e. the charge circuit of lithium battery group is cut off, lithium
Battery pack will stop charging.Voltage follower circuit is in overcharge condition and is always maintained at.Until the positive P of voltage follower circuit
After connecting discharge load between cathode P-, although closing because overcharging electric control switch pipe at this time, its internal diode is square
To identical as the direction of discharge loop, therefore discharge loop can discharge, when the voltage of lithium battery group is placed to below about 11V
When, the first chip U1 stops additives for overcharge protection state again in third pin output HIGH voltage, makes overcharging in the second chip U2
The conducting of automatically controlled tubulation, i.e. the cathode B- of lithium battery group and voltage follower circuit cathode P- are connected again, and lithium battery group again can be into
The normal charge and discharge of row.
Referring to Fig. 3, it is further used as preferred embodiment, the electric quantity display circuit includes third chip U3, third
Resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7 and the first LED light LED1, the second LED light
LED2, third LED light LED3, the 4th LED light LED4 and the 5th LED light LED5；
The first pin of the third chip U3 is connect by 3rd resistor R3 with the cathode of the first LED light LED1, described
The second pin of third chip U3 is connect by the 4th resistance R4 with the cathode of the second LED light LED2, the third chip U3's
Third pin is connect by the 5th resistance R5 with the cathode of third LED light LED3, and the 4th pin of third chip U3 passes through the 6th
Resistance R6 is connect with the cathode of the 4th LED light LED4, and the 5th pin of third chip U3 passes through the 7th resistance R7 and the 5th LED light
The cathode of LED5 connects, the ground the third chip U3 the 6th pin VNV, the anode of the first LED light LED1, the second LED light LED2
Anode, the anode of third LED light LED3, the anode of the 4th LED light LED4 and the 5th LED light LED5 anode and lithium battery
The anode connection of first output end of group.
The third chip U3 uses chip model for the chip of SC8051A.The present embodiment shows lithium electricity by LED light
The electricity surplus of pond group uses 5 LED light, and respectively representing electricity surplus is 0%, 25%, 50%, 75%, 100%
State, the anode of the third chip U3 and the first output end of lithium battery group connect, and the electricity for obtaining lithium battery group in real time remains
Balance information, and according to the working condition of electricity surplus information control LED light.User is facilitated to understand the residue electricity of power supply in real time
Amount, arranged rational charging time preferably carry out detection work.
It is further used as preferred embodiment, the battery capacity of the lithium battery group is 10Ah.When the electricity of lithium battery group
Tankage is 10Ah, can disposably can detect more or less a hundred sample, the time that detection expends can be greatly decreased, on the other hand significantly
Reduce the consumption of expensive detection reagent.
It is further used as preferred embodiment, the lithium battery group uses poly-lithium battery.Using polymer lithium electricity
Pond can make lithium battery group safer.
It is to be illustrated to the preferable implementation of the utility model, but the utility model is not limited to the reality above
Mode is applied, those skilled in the art can also make various be equal without departing from the spirit of the present invention
Deformation or replacement, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (5)
1. a kind of power source special of Portable toxicity instrument, which is characterized in that including the circuit board of shell and setting inside the shell, institute
Stating circuit board includes charging inlet circuit, lithium battery group, electric quantity display circuit and voltage follower circuit, the charging inlet circuit
Output end connect with lithium battery group input terminal, the input terminal of the first output end of the lithium battery group and electric quantity display circuit connects
It connects, the second output terminal of the lithium battery group and the input terminal of voltage follower circuit connect, the output of the voltage follower circuit
Voltage is 10.8V-12.6V.
2. a kind of power source special of Portable toxicity instrument according to claim 1, which is characterized in that the voltage output electricity
Road includes the first chip, the second chip, first resistor, second resistance and first capacitor；
The anode connection of the second output terminal of one end and lithium battery group of the first resistor, the other end of the first resistor are logical
Cross the cathode connection of the second output terminal of first capacitor and lithium battery group, the tie point of the first resistor and first capacitor and the
5th pin of one chip connects, and the third pin of first chip is connect with the 5th pin of the second chip, and described first
First pin of chip is connect with the 4th pin of the second chip, the second pin of first chip and one end of second resistance
Connection, the cathode of the other end of the second resistance as the output end of voltage follower circuit, the second of second chip are drawn
Foot and third pin are connected to the cathode of the second output terminal of lithium battery group, and the 7th pin and the 8th of second chip draws
Foot is connected to the cathode of the output end of voltage follower circuit.
3. a kind of power source special of Portable toxicity instrument according to claim 1, which is characterized in that the electricity display electricity
Road includes third chip, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and the first LED light, second
LED light, third LED light, the 4th LED light and the 5th LED light；
First pin of the third chip is connect by 3rd resistor with the cathode of the first LED light, and the of the third chip
Two pins connects by the 4th resistance with the cathode of the second LED light, the third pin of the third chip pass through the 5th resistance and
The cathode of third LED light connects, and the 4th pin of third chip is connect by the 6th resistance with the cathode of the 4th LED light, third
5th pin of chip is connect by the 7th resistance with the cathode of the 5th LED light, third chip ground the 6th pin, first
The anode of LED light, the anode of the second LED light, the anode of third LED light, the anode of the 4th LED light and the 5th LED light anode
It is connect with the anode of the first output end of lithium battery group.
4. a kind of power source special of Portable toxicity instrument according to claim 1, which is characterized in that the lithium battery group
Battery capacity is 10Ah.
5. a kind of power source special of Portable toxicity instrument according to claim 1, which is characterized in that the lithium battery group is adopted
Use poly-lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920167619.XU CN209419270U (en) | 2019-01-30 | 2019-01-30 | A kind of power source special of Portable toxicity instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920167619.XU CN209419270U (en) | 2019-01-30 | 2019-01-30 | A kind of power source special of Portable toxicity instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209419270U true CN209419270U (en) | 2019-09-20 |
Family
ID=67944691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920167619.XU Active CN209419270U (en) | 2019-01-30 | 2019-01-30 | A kind of power source special of Portable toxicity instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209419270U (en) |
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2019
- 2019-01-30 CN CN201920167619.XU patent/CN209419270U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 510660 No.12 Zhongshan 1st Road, Yuexiu District, Guangzhou, Guangdong Province Patentee after: Guangzhou Water Supply Co., Ltd Address before: 510600, No. 12, Zhongshan Road, Yuexiu District, Guangdong, Guangzhou Patentee before: Guangzhou Running Water Corp. |