CN206878516U - A kind of temperature alarm - Google Patents
A kind of temperature alarm Download PDFInfo
- Publication number
- CN206878516U CN206878516U CN201720707036.2U CN201720707036U CN206878516U CN 206878516 U CN206878516 U CN 206878516U CN 201720707036 U CN201720707036 U CN 201720707036U CN 206878516 U CN206878516 U CN 206878516U
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- circuit
- battery
- temperature sense
- amplifier
- temperature
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Abstract
It the utility model is related to a kind of temperature alarm, including temperature sense circuit, battery, charging circuit, control circuit, the control circuit detects controls charging circuit to be charged to battery and be powered to temperature sense circuit during cell voltage deficiency, control circuit control charging circuit disconnects and continues to make battery be powered temperature sense circuit, comparison circuit, warning circuit after the battery is fully charged, for receiving drive signal and sending alarm, the utility model has the advantages that：When the voltage of battery is less than a certain preset value, charging circuit is powered to battery and temperature sense circuit, after battery is fully charged, charging circuit stops charging to battery, and battery is set to continue to power to temperature sense circuit, now the voltage of battery is continually maintained on default voltage, and then ensures that temperature sensor will not cause the degree of accuracy of detection to decline because supply voltage is too low.
Description
Technical field
A kind of alarm is the utility model is related to, more particularly to a kind of temperature alarm.
Background technology
Temperature alarm is to send the device of alarm, temperature alarm for detection temperature and when temperature exceedes certain threshold value
Often it is installed in indoor for monitoring temperature or fire preventing.As application publication number is public for the Chinese patent of " CN201926509U "
A kind of temperature alarm is driven, this temperature alarm is general to detect the temperature in environment using the sensor comprising thermistor
Degree, sensor is typically battery powered, but after common batteries work a period of time, the voltage of battery can occur it is certain under
Drop, and then the data for causing sensor to detect are not accurate enough, this problem is badly in need of solving.
Utility model content
The purpose of this utility model is to provide a kind of temperature alarm, and having prevents sensor from causing because of supply voltage deficiency
Detect the characteristics of not accurate enough.
Above-mentioned technical purpose of the present utility model technical scheme is that：A kind of temperature alarm,
Including：
Temperature sense circuit, for induced signal corresponding to the temperature of induced environment and output；
Battery, it is connected with temperature sense circuit, for being powered to temperature sense circuit；
Charging circuit, including control terminal and output end, the output end of the charging circuit is connected with battery, for battery
Charging；
Control circuit, including input and output end, the input of the control circuit are connected with battery, the control electricity
The output end on road and the control terminal of charging circuit connect, and the control circuit controls charging circuit when detecting cell voltage deficiency
Battery is charged, and controls charging circuit to be powered temperature sense circuit, control circuit after the battery is fully charged
Control charging circuit disconnects and continues to make battery be powered temperature sense circuit；
Comparison circuit, including input and output end, the input of the comparison circuit are connected with temperature sense circuit, are used
In receiving the induced signal that sends of temperature sense circuit and send driving when the size of the induced signal exceedes default threshold value
Signal；
Warning circuit, it is connected with the output end of the comparison circuit, for receiving drive signal and sending alarm.
Temperature sense circuit is powered by battery by using above-mentioned technical proposal, during use, alarm uses one section
After time, the voltage of battery tapers into, and when the voltage of battery is less than a certain preset value, control circuit detects the electricity of battery
Low, the now connection between control circuit disconnection battery and temperature sense circuit is pressed through, and battery is carried out using charging circuit
Charging, while temperature sense circuit is powered using charging circuit, after battery is fully charged, charging circuit stops to battery
Charging, and make battery continue to power to temperature sense circuit, now the voltage of battery is continually maintained on default voltage, is entered
And ensureing temperature sensor will not cause the degree of accuracy of detection to decline because supply voltage is too low.
Preferably, the charging circuit includes transformer and rectifier bridge.
By using above-mentioned technical proposal, transformer can be by the voltage conversion of normal domestic electricity to being adapted to charge the battery
Voltage, while AC conversion can be direct current by rectifier bridge, most at last common AC conversion to be adapted to fill to battery
The direct current of electricity.
Preferably, the control circuit includes：
IGCT, the anode of the IGCT are connected to the output end of charging circuit, the output end series connection of the IGCT
There is relay and be connected to the positive pole of battery, the relay is normal between anode and temperature sense circuit including being series at
Enclosed relay switch, relay switch disconnects when the relay obtains electric；
3rd amplifier, the in-phase input end of the 3rd amplifier are connected with reference voltage, and the relay switch is also
Between the inverting input of the 3rd amplifier and the positive pole of battery, the inverting input of the 3rd amplifier be connected to after
Electric switch is connected to the gate pole of IGCT close to one end of temperature sense circuit, the output end of the 3rd amplifier.
By using above-mentioned technical proposal, when the voltage of battery is less than reference voltage, the 3rd amplifier output high level
To the gate pole of IGCT, make turn on thyristors, and then charging circuit is charged battery, at the same relay obtain it is electric, make after
Electric switch disconnects, and then by the separated of the positive pole of battery and temperature sense circuit, by the positive pole of battery and the 3rd amplifier
Inverting input disconnect, while now charging circuit charges to battery, be also powered to temperature sense circuit,
When the electricity of battery is full of, the electric current for flowing through IGCT is gradually reduced, brilliant when flowing through the electric current bottom of IGCT in certain value
Brake tube disconnects, and now relay powers off, and charging circuit stops charging to battery, while relay switch closes, and battery continues pair
Temperature sense circuit is powered, and control circuit continues to be monitored the voltage of battery.
Preferably, the temperature sense circuit includes thermistor, one end of the thermistor is in series with resistance simultaneously
Ground connection.
By using above-mentioned technical proposal, the resistance of thermistor can produce change according to the change two of environment temperature,
And then the signal of a change is produced, when the resistance of thermistor changes, ohmically voltage can change, the electricity
The change of pressure reflects the change of induced signal, and the change of detection temperature is easy in the change by comparing the voltage.
Preferably, the comparison circuit includes：
First amplifier, the in-phase input end of first amplifier is connected to the output end of temperature sense circuit, described
The inverting input of first amplifier is connected with the first comparison voltage, and the induced signal of the temperature sense circuit output is more than the
First amplifier output drive signal during one comparison voltage.
By using above-mentioned technical proposal, first when the induced signal of temperature sense circuit output is more than the first comparison voltage
Amplifier output drive signal, therefore when temperature is higher than a certain upper limit, or temperature is less than a certain lower limit, the 3rd amplifier can
The drive signal that output driving warning circuit starts.
Preferably, the comparison circuit also includes：
Second amplifier, the inverting input of second amplifier is connected to the output end of temperature sense circuit, described
The in-phase input end of second amplifier is connected with the second comparison voltage, and the induced signal of the temperature sense circuit output is less than the
Second amplifier output drive signal during two comparison voltages.
By using above-mentioned technical proposal, when induced signal is less than the second comparison voltage, the second amplifier can also export
Drive signal, therefore when environment temperature is higher than a certain upper limit or the first a certain lower limit, comparison circuit can all send driving alarm
The drive signal of circuit start, therefore more accurate monitoring can be carried out to environment temperature.
Preferably, the warning circuit includes the first triode and the second triode in parallel, first triode
Turned on after receiving drive signal with the second triode, the colelctor electrode of first triode and the second triode is connected with electricity
Source, the emitter stage of first triode and the second triode are connected with buzzer.
By using above-mentioned technical proposal, when the first amplifier and the second amplifier wherein any one send drive signal
Afterwards, any one in the first triode and the second triode receives drive signal and turned on, and then buzzer is obtained electric and work
Make.
In summary, the utility model has the advantages that：Temperature sense circuit is powered by battery during use,
After alarm uses a period of time, the voltage of battery tapers into, when the voltage of battery is less than a certain preset value, control circuit
The brownout of battery is detected, now control circuit disconnects the connection between battery and temperature sense circuit, and utilizes charging
Circuit is charged to battery, while temperature sense circuit is powered using charging circuit.
After battery is fully charged, charging circuit stops charging to battery, and makes battery continue to power to temperature sense circuit,
Now the voltage of battery is continually maintained on default voltage, so ensure temperature sensor will not because supply voltage is too low and
The degree of accuracy of detection is caused to decline.
Brief description of the drawings
Fig. 1 is the module diagram of embodiment, for embodying the annexation between each circuit；
Fig. 2 is the circuit theory diagrams of embodiment, for embodying the charging principle of alarm.
In figure, 1, temperature sense circuit；2nd, charging circuit；3rd, control circuit；4th, comparison circuit；5th, warning circuit.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model
Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but
As long as all protected in right of the present utility model by Patent Law.
Embodiment：A kind of temperature alarm, as shown in figure 1, control circuit 3 is connected with temperature sense circuit 1, control electricity
Road 3 is also connected with charging circuit 2, battery.The output end of temperature sense circuit 1 is connected with comparison circuit 4, comparison circuit 4 it is defeated
Go out end and be connected with warning circuit 5.
As shown in Fig. 2 charging circuit 2 includes a transformer T, for the civilian alternating currents of 220V to be changed into low pressure.Become
It is connected with depressor T for the rectifier bridge UR by AC conversion for direct current.Rectifier bridge UR output end is connected with electric capacity C1
And it is grounded.Rectifier bridge UR output end is also associated with control circuit 3.Control circuit 3 includes IGCT V, IGCT V anode with
Rectifier bridge UR output end connection, IGCT V negative electrode are connected with relay KM and relay switch SM.Relay switch SM is
Normally closed switch, relay switch SM have first end and the second end.The one end of relay KM away from IGCT V is connected to relay
Device switchs SM first end.The relay switch SM other end is connected with the 3rd amplifier OP3, the relay switch SM other end
The 3rd amplifier OP3 inverting input is connected to, the 3rd amplifier OP3 in-phase input end is connected with reference voltage V DD.The
Three amplifier OP3 output end is connected to IGCT V gate pole.Battery GB positive pole is connected to the first of relay switch SM
End, battery GB negative pole are connected to rectifier UR negative pole.The one end of relay KM away from IGCT V is also attached to relay and opened
Close SM the second end.Relay switch SM the second end is also attached to temperature sense circuit 1.Temperature sense circuit 1 include with after
The thermistor RT of electric switch SM the second end connection, thermistor RT resistance decline with the rise of temperature.Temperature-sensitive
The one end of resistance RT away from relay switch SM is in series with resistance R and is grounded.It is temperature sense between thermistor RT and resistance R
The output end of circuit 1, the output end of temperature sense circuit 1 are connected with comparison circuit 4.Comparison circuit 4 includes the first amplifier OP1
With the second amplifier OP2.First amplifier OP1 inverting input is connected with the first comparison voltage VA, the first amplifier OP1's
Input in the same direction is connected to the output end of temperature sense circuit 1.Second amplifier OP2 in-phase input end is connected with second and compared
Voltage VB, the second amplifier OP2 reverse input end are connected to the output end of temperature sense circuit 1.First amplifier OP1's is defeated
The output end for going out end and the second amplifier OP2 is connected to warning circuit 5.Warning circuit 5 includes the first triode Q1, the two or three pole
Pipe Q2 and buzzer L.First triode Q1 and the second triode Q2 is in parallel, and both colelctor electrodes are all connected with power supply VE, both
Emitter stage all with being connected to buzzer L, buzzer L is grounded away from the first triode Q1 and the second triode Q2 one end.The
One triode Q1 base stage is connected to the first amplifier OP1 output end, and the second triode Q2 base stage is connected to the second amplification
Device OP2 output end.
Application method：When battery GB voltage is normal, relay switch SM closures, IGCT V disconnects.Now GB pairs of battery
Temperature sense circuit 1 is powered.When environment temperature rises, thermistor RT resistance decrease, now temperature sense circuit 1 is defeated
Go out the induced signal increase of end output.When environment temperature is increased to preset value, thermistor RT resistance decrease counts corresponding to
Value, now induced signal is increased above the first comparison voltage VA, first comparator OP1 output end output drive signal, makes
First triode Q1 is turned on, and then buzzer L is obtained electric and worked.When environment temperature is less than a certain preset value, temperature sense
The size of the induced signal of the output end output of circuit 1 is less than the second comparison voltage VB, and now the second comparator output driving is believed
Number, turn on the second triode Q2, now buzzer L is obtained electric and worked.
When battery GB voltage is less than reference voltage, the 3rd amplifier OP3 output end exports high level to IGCT V's
Gate pole, and then turn on IGCT V.Now charging circuit 2 charges to battery GB and temperature sense circuit 1 is powered, while after
Electrical equipment KM obtain it is electric make relay switch SM disconnect, and then make control circuit 3 temporarily not to battery GB voltage monitoring, simultaneously switch off
Power supplies of the battery GB to temperature sense circuit 1.After battery GB electricity is full of, the electric current for flowing through IGCT V is gradually reduced most
Eventually disconnect IGCT V, now relay SM power-off closes relay switch SM.Now charging circuit 2 stops to battery GB
Charging, battery continues to power to temperature sense circuit 1, and control circuit 3 continues to be monitored battery GB voltage.
Claims (7)
- A kind of 1. temperature alarm, it is characterised in that including：Temperature sense circuit (1), for induced signal corresponding to the temperature of induced environment and output；Battery, it is connected with temperature sense circuit (1), for being powered to temperature sense circuit (1)；Charging circuit (2), including control terminal and output end, the output end of the charging circuit (2) is connected with battery, for electricity Charge in pond；Control circuit (3), including input and output end, the input of the control circuit (3) are connected with battery, the control The output end of circuit (3) is connected with the control terminal of charging circuit (2), when the control circuit (3) detects cell voltage deficiency Control charging circuit (2) charges to battery, and controls charging circuit (2) to be powered temperature sense circuit (1), described Control circuit (3) control charging circuit (2) disconnects and continues to make battery supply temperature sense circuit (1) after battery is fully charged Electricity；Comparison circuit (4), including input and output end, input and the temperature sense circuit (1) of the comparison circuit (4) connect Connect, for receiving induced signal that temperature sense circuit (1) sends and when the size of the induced signal exceedes default threshold value Send drive signal；Warning circuit (5), it is connected with the output end of the comparison circuit (4), for receiving drive signal and sending alarm.
- 2. a kind of temperature alarm according to claim 1, it is characterised in that the charging circuit (2) includes transformer And rectifier bridge.
- 3. a kind of temperature alarm according to claim 1, it is characterised in that the control circuit (3) includes：IGCT, the anode of the IGCT are connected to the output end of charging circuit (2), and the output end of the IGCT is in series with Relay and the positive pole for being connected to battery, the relay include being series between anode and temperature sense circuit (1) Normal closing type relay switchs, and relay switch disconnects when the relay obtains electric；3rd amplifier, the in-phase input end of the 3rd amplifier are connected with reference voltage, and the relay switch is also located at Between the inverting input of 3rd amplifier and the positive pole of battery, the inverting input of the 3rd amplifier is connected to relay Switch is connected to the gate pole of IGCT close to one end of temperature sense circuit (1), the output end of the 3rd amplifier.
- 4. a kind of temperature alarm according to claim 1, it is characterised in that the temperature sense circuit (1) includes heat Quick resistance, one end of the thermistor are in series with resistance and are grounded.
- 5. a kind of temperature alarm according to claim 1, it is characterised in that the comparison circuit (4) includes：First amplifier, the in-phase input end of first amplifier are connected to the output end of temperature sense circuit (1), and described The inverting input of one amplifier is connected with the first comparison voltage, and the induced signal of temperature sense circuit (1) output is more than First amplifier output drive signal during the first comparison voltage.
- 6. a kind of temperature alarm according to claim 5, it is characterised in that the comparison circuit (4) also includes：Second amplifier, the inverting input of second amplifier are connected to the output end of temperature sense circuit (1), and described The in-phase input end of two amplifiers is connected with the second comparison voltage, and the induced signal of temperature sense circuit (1) output is less than Second amplifier output drive signal during the second comparison voltage.
- 7. a kind of temperature alarm according to claim 6, it is characterised in that the warning circuit (5) includes in parallel First triode and the second triode, first triode and the second triode turn on after receiving drive signal, and described The colelctor electrode of one triode and the second triode is connected with power supply, the emitter stage connection of first triode and the second triode There is buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720707036.2U CN206878516U (en) | 2017-06-14 | 2017-06-14 | A kind of temperature alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720707036.2U CN206878516U (en) | 2017-06-14 | 2017-06-14 | A kind of temperature alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206878516U true CN206878516U (en) | 2018-01-12 |
Family
ID=61333377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720707036.2U Expired - Fee Related CN206878516U (en) | 2017-06-14 | 2017-06-14 | A kind of temperature alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206878516U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152543A (en) * | 2018-01-19 | 2018-06-12 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of electric energy metering wiring box with fault alarm function |
-
2017
- 2017-06-14 CN CN201720707036.2U patent/CN206878516U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152543A (en) * | 2018-01-19 | 2018-06-12 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of electric energy metering wiring box with fault alarm function |
| CN108152543B (en) * | 2018-01-19 | 2023-06-23 | 国网江苏省电力有限公司宿迁供电分公司 | Electric energy metering junction box with fault alarm function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180112 Termination date: 20210614 |