CN207067373U - Voltage monitoring instrument calibrating installation - Google Patents

Abstract

The utility model discloses a kind of voltage monitoring instrument calibrating installation,Solve the problems, such as not being noticeable in time when the temperature in housing is too high,Its drip irrigation device is,Temperature alarm includes being arranged in housing and for detecting the temperature change in housing with the temperature detecting unit of output temperature detection signal,Temperature detecting unit is coupled to receive the comparing unit of temperature detection signal,Comparing unit by the value of temperature detection signal compared with a reference value after export corresponding comparison signal,The control unit for receiving comparison signal and output control signal is coupled with comparing unit,The alarm unit in response to control signal is coupled with control unit,Voltage monitoring instrument calibrating installation of the present utility model,Temperature change that can effectively in monitoring voltage monitor calibrating installation housing by temperature detecting unit,When the temperature in housing is above standard temperature,Alarm unit can be warned,To remind staff to take corresponding measure in time.

Description

Voltage monitoring instrument calibrating installation

Technical field

It the utility model is related to voltage monitoring equipment, more particularly to voltage monitoring instrument calibrating installation.

Background technology

Voltage monitoring instrument calibrating installation is that caused voltage deviation slowly varying to power system normal operating condition enters The statistical voltage monitoring equipment of row continuous monitoring and statistics, mould is gathered by control chip, battery, internal memory, Wiring module, AD Block, LCD display module and communication module part composition.

Voltage monitoring instrument calibrating installation in the process of running, easily because of current work send out by the electronic component in its housing Heat, particularly during the broiling summer, if temperature of the accumulation on electronic component exceedes the maximum permissible temperature of the electronic component When, element easily is burnt, so as to influence the normal operation of whole voltage monitoring instrument calibrating installation, can also influence the use of equipment Life-span.

But staff can not often perceive the temperature change in voltage monitoring instrument calibrating installation housing in time, cause It when temperature in housing is too high, can not in time take appropriate measures, and then miss opportunity of most preferably remedying, therefore also have one Fixed room for improvement.

Utility model content

The purpose of this utility model is to provide a kind of voltage monitoring instrument calibrating installation, when the temperature in housing is too high, energy It is enough to be warned automatically.

Above-mentioned technical purpose of the present utility model technical scheme is that：

A kind of voltage monitoring instrument calibrating installation, including housing, the housing is interior to be provided with temperature alarm, the temperature alarming Device include being arranged in housing and for detect the temperature change in housing with the temperature detecting unit of output temperature detection signal, Temperature detecting unit is coupled to receive the comparing unit of temperature detection signal, the comparing unit has an a reference value, described A reference value correspond to housing in normal temperature, the comparing unit by the value of temperature detection signal compared with a reference value after Corresponding comparison signal is exported, the control list for receiving comparison signal and output control signal is coupled with the comparing unit Member, the alarm unit in response to control signal is coupled with described control unit；

When the temperature that temperature detecting unit is detected in housing is above standard temperature, described control unit control warning is single Member is warned.

Using such scheme, temperature that can effectively in monitoring voltage monitor calibrating installation housing by temperature detecting unit Degree change, when the temperature in housing is above standard temperature, alarm unit can be warned, to remind staff to adopt in time Take corresponding measure.

Preferably, the output end of the comparing unit has been also coupled to be used to improve benchmark threshold voltage with the temperature that debases the standard Feedback section.

Using such scheme, feedback section provides positive feedback signal for comparing unit, makes comparing unit in output high level After comparison signal, its benchmark threshold voltage can be improved by positive feedback, it is so as to reduce the normal temperature corresponding to a reference value, i.e., extensive Rewarming degree, avoid the value of temperature detection signal from being fluctuated near normal temperature value, and cause the working condition of alarm unit continuous Generation saltus step, and then improve accuracy and stability when alarm unit alerts.

Preferably, the comparing unit is also coupled to the adjustment portion for adjusting a reference value.

Using such scheme, adjustment portion can adjust a reference value of comparing unit, so as to adjust corresponding normal temperature value, To adapt to different operating modes, the scope of application is added.

Preferably, the alarm unit is sounding alarm.

Using such scheme, sounding alarm is more eye-catching, is more easy to attract much attention, so as to the police of improving warning unit Show effect.

Preferably, the side of the housing offers exhaust outlet, the position that exhaust outlet is corresponded in the housing is installed There is air exhausting device.

Using such scheme, the exhaust of hot air in housing can be gone out by exhaust outlet, air exhausting device can increase Flow rate during exhaust of hot air, with improving radiating effect.

Preferably, the air exhausting device includes the air draft flabellum of close exhaust outlet and is arranged at enclosure interior to drive The power source that air draft flabellum rotates.

Using such scheme, the combination of air draft flabellum and power source is simple in construction, while can ensure the row of air exhausting device Wind effect.

Preferably, the protection network for barrier air draft flabellum is fixed with the exhaust outlet.

Using such scheme, air draft flabellum can be isolated from the outside and come by protection network, avoid people from stretching into hand In exhaust outlet, so as to add security performance.

Coaxially turn with air draft flabellum preferably, the center of the air draft flabellum is extended with towards the direction of close protection network Dynamic detection axle, the center of the protection network offer the perforation passed through for detection axle, on the outer peripheral face of the detection axle and in The part of protection network is provided with magnetic part；The side of the housing is simultaneously provided with Speed sensing in the position of exhaust outlet side Device, the Speed sensing device include Hall sensor and Tip element, and the Hall sensor is right against the outer of detection axle Side wall simultaneously is used to detect being coupled to suddenly apart from detection signal, the Tip element accordingly closer or far from output for magnetic part Your sensor and in response to apart from detection signal；

When detection axle turns to magnetic part close to the position of Hall sensor, the Tip element is indicated；Conversely, Tip element stops instruction.

Using such scheme, detection axle can be rotated accordingly with the rotation of air draft flabellum, so as to arrange The rotary state of fan leaf extends to the outside of protection network；Magnetic part can be rotated accordingly with detection axle, and Hall is passed Sensor be arranged at detection axle side, can effectively monitor magnetic part closer or far from, so as to judge detect axle whether entering Row rotates；When monitoring that detecting axle is in rotary state, illustrate that air draft flabellum is currently in normal operating condition, now carry Show that unit can be indicated, enable one to be well understood that shell body temperature is too high is not as air exhausting device damage； Conversely, when detection axle stops operating, illustrate that air draft flabellum is out of service, now Tip element is without instruction, to carry People's air exhausting device of waking up breaks down, more hommization.

Preferably, also include being coupled to control unit and in response to the execution unit of control signal；When temperature detection list The temperature that member detects in housing be above standard temperature when, described control unit control execution unit action, so that Tip element It can be indicated；Conversely, Tip element can not be indicated.

Using such scheme so that, could be to detecting the rotation of axle during temperature exceeding standard of the Tip element only in housing State is indicated, so as to save electric energy.

Preferably, the Speed sensing device is provided with two, respectively symmetrically it is arranged on housing and in exhaust outlet both sides Position.

Using such scheme, because air draft flabellum is after out of service, detection axle have certain probability stop at magnetic part with The position of Hall sensor face, now Tip element can still provide for indicating, therefore can not accurate judgement air draft flabellum operation State；By the setting of two Speed sensing devices, two location points on detection axle outer peripheral face can be monitored simultaneously, due to magnetic Property part there was only one so that two Hall sensors can not be detected simultaneously by the close of magnetic part, therefore when detection axle is with air draft After flabellum stops, though magnetic part towards one of Hall sensor, Tip element in two Speed sensing devices also without Method indicated simultaneously, thus the Tip element that need to only check in two Speed sensing devices whether at the same be in instruction state, Just it can effectively judge to detect whether axle is in rotary state, and then judge whether air draft flabellum is in normal operating condition, also can Tip element is avoided to occur to indicate by mistake.

In summary, the utility model has the advantages that：Being capable of effective monitoring voltage by temperature detecting unit Temperature change in monitor calibrating installation housing, when the temperature in housing is above standard temperature, alarm unit can be carried out Warning, to remind staff to take corresponding measure in time.

Brief description of the drawings

Fig. 1 is the structural representation one of the present embodiment；

Fig. 2 is the circuit diagram one of the present embodiment；

Fig. 3 is the structural representation of air exhausting device in the present embodiment；

Fig. 4 is the structural representation two of the present embodiment；

Fig. 5 is the structural representation three of the present embodiment；

Fig. 6 is the circuit diagram two of the present embodiment.

In figure：1st, housing；2nd, temperature detecting unit；3rd, comparing unit；4th, control unit；5th, alarm unit；6th, feedback section； 7th, adjustment portion；8th, exhaust outlet；9th, air draft flabellum；10th, power source；11st, protection network；12nd, axle is detected；13rd, perforate；14th, magnetic part； 15th, Speed sensing device；16th, Hall sensor；17th, Tip element；18th, execution unit；19th, baffles.

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.

A kind of voltage monitoring instrument calibrating installation disclosed in the present embodiment, as depicted in figs. 1 and 2, including housing 1, in housing 1 Provided with temperature alarm, temperature alarm includes being arranged in housing 1 and for detecting the temperature change in housing 1 to export temperature Spend the temperature detecting unit 2 of detection signal, be coupled to temperature detecting unit 2 to receive the comparing unit 3 of temperature detection signal, than There is an a reference value compared with unit 3, the normal temperature that a reference value corresponds in housing 1, comparing unit 3 is by the value of temperature detection signal Corresponding comparison signal is exported after compared with a reference value.

Temperature detecting unit 2 includes thermistor Rt, resistance R6 and R7；Resistance R7 one end is coupled to voltage V2, another End is coupled to thermistor Rt one end, thermistor Rt other end ground connection；Resistance R6 one end is coupled to thermistor Rt With resistance R7 tie point, other end output temperature detection signal to comparing unit 3；Resistance R6 output end also passes through electric capacity C2 Ground connection.Wherein thermistor Rt preferably uses negative tempperature coefficient thermistor, i.e. resistance value reduces with the rise of temperature, instead It, increases with the reduction of temperature.

Thermistor Rt and resistance R7 constitutes bleeder circuit, when in the temperature in voltage monitoring instrument calibrating installation housing 1 When rising, thermistor Rt resistance reduces, and its tie point voltage between resistance R7 decreases；On the contrary, when in housing 1 Wen Duxiajiang when, thermistor Rt resistance increase, its tie point voltage between resistance R7 rises therewith.Wherein electric capacity C2 plays voltage regulation filtering, and resistance R6 plays metering function.

Comparing unit 3 is comparator U, and comparator U inverting input is coupled to resistance R6 and electric capacity C2 tie point, defeated Go out end and export corresponding comparison signal.

The control unit 4 for receiving comparison signal and output control signal, control unit 4 are coupled with comparing unit 3 Including relay KA, the triode Q1 of NPN type and sustained diode 2, one end of relay KA coil is coupled to voltage V3, The other end is coupled to triode Q1 colelctor electrode, and the output end that triode Q1 base stage is coupled to comparator U is corresponding to receive Comparison signal, grounded emitter；Sustained diode 2 and relay KA coil inverse parallel.

The alarm unit 5 in response to control signal is coupled with control unit 4, alarm unit 5 is sounding alarm, and it is wrapped Relay KA normally opened contact KA-1 and buzzer SP is included, relay KA normally opened contact KA-1 one end is coupled to voltage V4, The other end is coupled to buzzer SP one end, buzzer SP other end ground connection.When temperature detecting unit 2 is detected in housing 1 Temperature be above standard temperature when, control unit 4 control alarm unit 5 warned.

The output end of comparing unit 3 is also coupled to for improving benchmark threshold voltage with the feedback section 6 for the temperature that debases the standard.Instead Feedback portion 6 includes variable resistor R2 and diode D1, and diode D1 anode is coupled to comparator U output end, and negative electrode is coupled to Variable resistor R2 a ends, variable resistor R2 b ends are coupled to comparator U in-phase input end.

Positive feedback loop is formd by diode D1 and variable resistor R2, when comparator U exports high level, by just Output signal is added to comparator U in-phase input end by backfeed loop, raises the voltage of in-phase input end；Wherein diode D1 plays one-way conduction, prevents voltage V1 from pouring in down a chimney the output end to comparator U by positive feedback loop；Can power transformation by regulation Resistance R2 resistance can change the size of current for being flowed into comparator U in-phase input ends, so as to adjust the value of positive and negative feedthrough voltage.

Comparing unit 3 is also coupled to the adjustment portion 7 for adjusting a reference value.Adjustment portion 7 include variable resistor R1, can power transformation R3 and electric capacity C1 is hindered, variable resistor R1 a ends are coupled to a ends that voltage V1, b ends are coupled to variable resistor R3；Variable resistor R3 B ends ground connection, variable resistor R1 and variable resistor R3 tie point is coupled to comparator U in-phase input end.

Variable resistor R1 and R3 together constitutes bleeder circuit, can be adjusted between the two by the resistance for adjusting R1 and R3 Tie point voltage, the voltage acts on comparator U in-phase input end as the benchmark threshold voltage of comparing unit 3, and it is corresponding Normal temperature in voltage monitoring instrument calibrating installation housing 1, and magnitude of voltage is higher, corresponding normal temperature value is lower.

Electric capacity C1 both ends are respectively coupled to variable resistor R3 both ends, and electric capacity C1 plays pressure stabilization function so that variable resistor For R3 when being adjusted, the voltage change at its both ends can be more smooth.

As shown in Figure 3 and Figure 4, the side of housing 1 offers exhaust outlet 8, and the exhaust outlet 8 is preferably rounded, right in housing 1 Air exhausting device should be installed in the position of exhaust outlet 8.Air exhausting device includes the air draft flabellum 9 of close exhaust outlet 8 and is arranged at To drive the power source 10 that air draft flabellum 9 rotates inside housing 1, the power source 10 is preferably motor, the rotating shaft of the motor and row The axle center of fan leaf 9 is connected.The protection network 11 for barrier air draft flabellum 9, the shape of the protection network 11 are fixed with exhaust outlet 8 Be adapted to the shape of exhaust outlet 8, i.e., it is in the form of annular discs.

The center of air draft flabellum 9 is extended with the detection rotated coaxially with air draft flabellum 9 towards the direction of close protection network 11 Axle 12, the center of protection network 11 offers the perforation 13 passed through for detection axle 12, and detects the end that axle 12 exceeds protection network 11 Face.In order to ensure safety, the side of the housing 1 and position above exhaust outlet 8 is outward extended with baffles 19.Detect axle 12 On outer peripheral face and in being provided with magnetic part 14 beyond the part of protection network 11, the magnetic part 14 is preferably permanent magnet.

As shown in Figure 5 and Figure 6, the side of housing 1 and Speed sensing device 15 is installed in the position of the side of exhaust outlet 8, Speed sensing device 15 is provided with two, is respectively symmetrically arranged on housing 1 and in the position of the both sides of exhaust outlet 8.Speed sensing fills Putting 15 includes Hall sensor 16 and Tip element 17.

Hall sensor 16 be right against detection axle 12 lateral wall and for detect magnetic part 14 closer or far from defeated Go out accordingly apart from detection signal, more specifically, the inductive head of Hall sensor 16 should be right against the outer peripheral face of detection axle 12 simultaneously Sustained height is in magnetic part 14, while when detection axle 12 turns to the position of magnetic part 14 and the face of Hall sensor 16 When, the distance between magnetic part 14 and Hall sensor 16 should be maintained on the critical detecting distance of the Hall sensor 16.

Tip element 17 is coupled to Hall sensor 16 and in response to apart from detection signal.Tip element 17 includes luminous two Pole pipe LED and NPN type triode Q2, the anode of LED are coupled to voltage V5, and negative electrode is coupled to triode Q2's Colelctor electrode, triode Q2 base stage are coupled to the output end of Hall sensor 16 to receive apart from detection signal, grounded emitter. When detection axle 12 turns to magnetic part 14 close to the position of Hall sensor 16, Tip element 17 is indicated；Conversely, prompting Unit 17 stops instruction.

Also include being coupled to control unit 4 and in response to the execution unit 18 of control signal, execution unit 18 is relay KA normally opened contact KA-2, its one end are coupled to triode Q2 emitter stage, other end ground connection.When temperature detecting unit 2 detects When being above standard temperature to the temperature in housing 1, control unit 4 controls execution unit 18 to act, so that Tip element 17 can Indicated；Conversely, Tip element 17 can not be indicated.

Specific work process is as follows：

When the temperature in voltage monitoring instrument calibrating installation housing 1 is normal, thermistor Rt resistance is higher, makes comparator The voltage of U inverting inputs is more than the voltage of its in-phase input end, and at this moment comparator U exports low level comparison signal to three poles Pipe Q1 base stage, end triode Q1, with block system relay KA current supply circuit, relay KA is in power failure state, its Corresponding normally opened contact KA-1 and KA-2 all disconnects, and cuts off the current supply circuit of buzzer SP and LED respectively, makes Buzzer SP is obtained without warning, while LED does not light.

When the temperature rise in voltage monitoring instrument calibrating installation housing 1, the thermistor Rt's that is arranged inside housing 1 Resistance reduces therewith, and the voltage for the inverting input for making to act on comparator U reduces；When temperature is above standard temperature, than Anti-phase input terminal voltage compared with device U is just decreased to less than the voltage of its in-phase input end, makes the ratio of comparator U output high level Base stage compared with signal to triode Q1, turn on triode Q1, relay KA coil obtains electric adhesive, its corresponding normally opened contact KA-1 and KA-2 is all closed, and to turn on buzzer SP current supply circuit, is prompted buzzer SP sounding.

Comparator U output end raises the voltage of in-phase input end by feedback section 6 simultaneously, so that in housing 1 Recovery temperature is less than original normal temperature, and the resistance by adjusting variable resistor R2 can adjust the height of recovery temperature.

Now, if air draft flabellum 9 is in normal operating condition, detection axle 12 can be rotated synchronously so that detection Magnetic part 14 on axle 12 can be constantly close to the Speed sensing device 15 with the remote both sides of exhaust outlet 8.When 12 turns of axle of detection Move to magnetic part 14 be right against the Hall sensor 16 on one of Speed sensing device 15 when, Hall sensor 16 can export The base stage apart from detection signal to triode Q2 of high level, turn on triode Q2, LED is luminous to be carried Show.

When detection axle 12 turns to position of the magnetic part 14 not with the face of Hall sensor 16, the position of magnetic part 14 surpasses Go out the scope that Hall sensor 16 can be detected, so as to export the low level base stage apart from detection signal to triode Q2, make Triode Q2 ends, and LED stops luminous.Therefore, when air draft flabellum 9 is in normal operating condition, two turn LED on fast induction installation 15 can alternately flash；Because the rotating speed of air draft flabellum 9 is higher, then light The flicker frequency of diode (LED) is also higher, therefore the dispaly state of LED is almost Chang Liang.

Now, if air exhausting device breaks down, air draft flabellum 9 is out of service, and detection axle 12 also synchronously stops operating, this When magnetic part 14 at least can the Speed sensing device 15 away from wherein side so that the Hall sensor 16 of the side can't detect magnetic Property part 14 magnetic field, so as to export the low level base stage apart from detection signal to triode Q2, make triode Q2 end, light Diode (LED) stops luminous.

After voltage monitoring instrument calibrating installation is out of service, the temperature inside housing 1 is begun to decline, thermistor Rt resistance Value increases therewith, so that comparator U anti-phase input terminal voltage constantly raises, when temperature drops to less than original normal temperature Recovery temperature when, comparator U anti-phase input terminal voltage could be more than the voltage of its in-phase input end again, make comparator U Low level comparison signal is exported again to triode Q1 base stage, ends triode Q1, relay KA deactivation coil is replied by cable Position, its corresponding normally opened contact KA-1 and KA-2 all disconnects, to cut off buzzer SP and LED power supply respectively Loop so that buzzer SP stops warning, while LED stops lighting.

Claims (10)

1. a kind of voltage monitoring instrument calibrating installation, including housing (1), it is characterized in that：Temperature alarming is provided with the housing (1) Device, the temperature change that the temperature alarm includes being arranged in housing (1) and for detecting in housing (1) are examined with output temperature Survey the temperature detecting unit (2) of signal, be coupled to temperature detecting unit (2) to receive the comparing unit of temperature detection signal (3), The comparing unit (3) has an a reference value, the normal temperature that a reference value corresponds in housing (1), the comparing unit (3) by the value of temperature detection signal compared with a reference value after export corresponding comparison signal, coupling on the comparing unit (3) Be connected to the control unit (4) for receiving comparison signal and output control signal, be coupled with described control unit (4) in response to The alarm unit (5) of control signal；

When the temperature that temperature detecting unit (2) is detected in housing (1) is above standard temperature, described control unit (4) control Alarm unit (5) is warned.

2. voltage monitoring instrument calibrating installation according to claim 1, it is characterized in that：The output end of the comparing unit (3) It is also coupled to for improving benchmark threshold voltage with the feedback section (6) for the temperature that debases the standard.

3. voltage monitoring instrument calibrating installation according to claim 2, it is characterized in that：The comparing unit (3) has been also coupled to For adjusting the adjustment portion (7) of a reference value.

4. voltage monitoring instrument calibrating installation according to claim 1, it is characterized in that：The alarm unit (5) is sounding report Alert device.

5. the voltage monitoring instrument calibrating installation according to any one of Claims 1-4, it is characterized in that：The side of the housing (1) Face offers exhaust outlet (8), and the position that exhaust outlet (8) is corresponded in the housing (1) is provided with air exhausting device.

6. voltage monitoring instrument calibrating installation according to claim 5, it is characterized in that：The air exhausting device is included close to air draft The air draft flabellum (9) of mouthful (8) and to be arranged at housing (1) internal to drive the power source (10) that air draft flabellum (9) rotates.

7. voltage monitoring instrument calibrating installation according to claim 6, it is characterized in that：Use is fixed with the exhaust outlet (8) In the protection network (11) of barrier air draft flabellum (9).

8. voltage monitoring instrument calibrating installation according to claim 7, it is characterized in that：The center court of the air draft flabellum (9) And be extended with the detection axle (12) rotated coaxially with air draft flabellum (9), the protection network (11) close to the direction of protection network (11) Center offer for detection axle (12) perforation (13) that passes through, on the outer peripheral face of the detection axle (12) and in beyond protection network (11) part is provided with magnetic part (14)；The side of the housing (1) is simultaneously provided with rotating speed in the position of exhaust outlet (8) side Induction installation (15), the Speed sensing device (15) include Hall sensor (16) and Tip element (17), and the Hall passes Sensor (16) be right against the lateral wall of detection axle (12) and for detect magnetic part (14) closer or far from corresponding to export Apart from detection signal, the Tip element (17) is coupled to Hall sensor (16) and in response to apart from detection signal；

When detection axle (12) turns to magnetic part (14) close to the position of Hall sensor (16), the Tip element (17) is entered Row instruction；Conversely, Tip element (17) stops instruction.

9. voltage monitoring instrument calibrating installation according to claim 8, it is characterized in that：Also include being coupled to control unit (4) And in response to the execution unit (18) of control signal；When temperature detecting unit (2) detects that the temperature in housing (1) is above standard During temperature, described control unit (4) control execution unit (18) action, so that Tip element (17) can be indicated；Conversely, Tip element (17) can not be indicated.

10. voltage monitoring instrument calibrating installation according to claim 8, it is characterized in that：The Speed sensing device (15) sets There are two, be respectively symmetrically arranged on housing (1) and in the position of exhaust outlet (8) both sides.