CN203869820U - Multichannel incombustible conductive liquid detection relay - Google Patents
Multichannel incombustible conductive liquid detection relay Download PDFInfo
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- CN203869820U CN203869820U CN201420086731.8U CN201420086731U CN203869820U CN 203869820 U CN203869820 U CN 203869820U CN 201420086731 U CN201420086731 U CN 201420086731U CN 203869820 U CN203869820 U CN 203869820U
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Abstract
The utility model discloses a multichannel incombustible conductive liquid detection relay. The relay comprises a power supply unit, a detection unit, a relay unit, an alarm indication unit and a control unit. The detection unit comprises a sensor and a detection circuit. Feedback of a detection signal to the detection circuit is carried out by sensor. The detection circuit carries out filtering and amplification of the signal, and the processed signal is transmitted to the control unit. The control unit analyzes the signal, when the signal is determined to be a leakage signal, a control signal is sent to the relay unit. The relay unit acts and controls the alarm indication unit to send an alarm signal of a corresponding channel. The power supply unit provides a stable direct current power supply for each unit. The multichannel incombustible conductive liquid detection relay is suitable for a direct current circuit and an alternating current circuit. Addition of an adapter for converting an alternating current into a direct current is not needed. The implementation circuit is simplified. Through multichannel parallel arrangement, the relay can achieve detection of multiple channels, the construction cost is saved, the detection sensitivity is high, and the relay can be widely used for detection of incombustible conductive liquids.
Description
Technical field
The utility model belongs to relay technical field, is specifically related to the non-flammable conducting liquid of a kind of hyperchannel and detects relay.
Background technology
In commercial establishment, integrated mill's environment and the production equipment of modern city, often the leakage of certain non-flammable conducting liquid (as water) is monitored to prevention.Most is to adopt manual patrol pattern to monitor.Due to artificial problem or area is hidden manually cannot make an inspection tour and occur because the problems such as leak of liquid causes environmental pollution, device damage happen occasionally.
As shown in Figure 1, existing leak of liquid detection relay comprises liquid detection sensor, alternating current is converted to galvanic adapter and warning or control signal output module.Existing leak of liquid detects relay to be only had a sense channel and can only use DC direct current supply, for alternating circuit, just must could use by couple in adapter.If need to detecting the non-flammable conducting liquid leakage situation in multiple places, user just must be provided in multiple local adapters of leak of liquid being installed being detected relays and supporting interchange conversion direct current.Cause like this construction cost of whole system to increase, rate of breakdown and maintenance difficulties also increase.
Utility model content
In order to overcome above-mentioned technological deficiency, the utility model provides a kind of can measure the non-flammable conducting liquid detection relay of hyperchannel that multiple places and direct supply and AC power are all suitable for simultaneously.
In order to address the above problem, the utility model is achieved by following technical scheme:
The non-flammable conducting liquid of hyperchannel described in the utility model detects relay, comprises power supply unit, detecting unit, relay unit, warning indicating member and control module;
Described power supply unit, for supplying with its required power supply in working cell, described power supply unit comprises Voltage stabilizing module, direct current module and alternating current module; Described power supply unit is provided with two power supply output points, comprises the first power supply output point and second source output point;
Described Voltage stabilizing module comprises the first voltage stabilizing diode, the second voltage stabilizing diode, the 3rd voltage stabilizing diode and the first fixed resistance, described the first voltage stabilizing diode and the use in parallel of the second voltage stabilizing diode, described the 3rd voltage stabilizing diode is arranged in parallel with the second voltage stabilizing diode after connecting with the first fixed resistance; Described the first power supply output point is arranged on the negative pole intersection point of the first voltage stabilizing diode and the second voltage stabilizing diode; Described second source output point is arranged on the negative pole intersection point of the first fixed resistance and the 3rd voltage stabilizing diode;
Described direct current modular power source signal, by a tripod joint, enters into Voltage stabilizing module through the 8th resistance, the last direct current from the first power supply output point and second source output point stable output;
Described alternating current module comprises high-frequency transformer, switching power source chip and diode, and its power supply signal is the concussion control to high-frequency transformer, the rectification of diode by switching power source chip, the direct current of stable output;
Described detecting unit, comprises some sensors that detect for non-flammable conducting liquid and for to sensor signal analyzing and processing and signal is transferred to the testing circuit of control module, described testing circuit comprises some parallel ports, each passage comprises one the 3rd electric capacity that is arranged on its signal incoming end, one the 9th resistance and a triode, described signal incoming end is connected with described sensor, the signal of receiving sensor, signal is through the filtering processing of the 3rd electric capacity and the 9th resistance, enter into the base stage of triode, collector by triode exports control module to, the emitter of described triode is connected with ground wire, the collector of described triode is connected with power supply through 1 the tenth resistance, described power supply is connected with the output terminal of power supply unit, the signal output part that the non-flammable conducting liquid of described hyperchannel detects relay is arranged on the intersection point of the collector of the tenth resistance and triode,
Described control module, for receiving after the leak of liquid signal of testing circuit feedback, processes signal, sends control signal to relay unit;
Described relay unit, carries out the closure of corresponding normally opened contact or opening of normally closed contact after receiving control signal, to realize warning;
Described warning indicating member, comprises the pilot lamp being arranged on each passage, and described warning indicating member receives and opens after the alerting signal of control module bright or extinguish the pilot lamp of corresponding sense channel.
Further, the power supply signal of described alternating current module is successively through the 7th fixed resistance and the first diode, be connected to one end of the primary coil of a transformer, the other end of described transformer is connected with the drain lead of switching power source chip, and the 5th diode that one end of the secondary coil of described transformer arranges by a forward is connected with the negative pole of the first voltage stabilizing diode of Voltage stabilizing module; The other end of the secondary coil of described transformer is connected with ground wire;
The two ends of described the 5th diode are parallel with one second fixed resistance and the first electric capacity, described the second fixed resistance and the first capacitances in series setting, described the first fixed resistance is connected with the positive pole of the 5th diode, and described the first electric capacity is connected with the negative pole of the 5th diode;
Described switching power source chip enable or under-voltage pin is connected with the negative pole of the first diode with the 6th fixed resistance by the 5th fixed resistance; Described enable or under-voltage pin is also connected with a photo-coupler, is finally connected with the negative pole of the 5th diode by the 3rd fixed resistance, and the 4th voltage stabilizing diode that the other end that described photo-coupler is exported passes through a reversal connection is connected with ground wire; The two ends of described photo-coupler output are connected with one the 4th fixed resistance; The other end of described photo-coupler input is connected to by one second electrochemical capacitor in the bypass or multi-functional pin of switching power source chip, and the source lead of described switching power source chip connects with the negative pole of the second electrochemical capacitor being connected on bypass or multi-functional pin; The source lead of described switching power source chip is connected with the pin of power supply input adapter by the second diode;
Described the first voltage stabilizing diode two ends are also arranged in parallel to be useful on and cut off galvanic the first electrochemical capacitor;
Between the two ends of described transformer, be provided with a forward the 5th voltage stabilizing diode and reverse the 4th diode for overvoltage protection;
Between the negative pole of the positive pole of described the first diode and the second diode, be provided with one for regulating the regulating resistance of alternating current blocks current;
The positive interpolar of the negative pole of described the first diode and the second diode is provided with the 3rd electrochemical capacitor for filtering;
On node between described regulating resistance and the second diode, be connected with the 3rd diode for rectification, the positive pole of described the 3rd diode is connected with ground wire.
Further, the power supply of described alternating current module is 85V～265VAC, and the power supply of described direct current module is 24VDC ± 15%.
Further, in order to adapt to different tracer liquids, described detecting unit is provided with the sensitivity control circuit of the electric current for adjusting described sensor, and described sensitivity control circuit comprises 1 the 12 fixed resistance and one second regulating resistance of connecting with described the 12 fixed resistance.
Further, described control module is AVR High Speed Microcontroller, and described microcontroller is ATMEGA16_TQFP44 microcontroller.
Further, the non-flammable conducting liquid detection relay of described hyperchannel is that the non-flammable conducting liquid of Five-channel detects relay
Compared with prior art, the beneficial effects of the utility model are:
The utility model is applicable to DC circuit and alternating circuit, the electricity that do not need to increase exchanges converts galvanic adapter to, simplify implementing circuit, multichannel being arranged in parallel, a relay can be realized multichannel detection, and corresponding sense channel can be set according to actual needs, saves construction cost, and detection sensitivity is high, can be widely used in the detection of non-flammable conducting liquid.
Brief description of the drawings
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail, wherein:
Fig. 1: existing leak of liquid detects relay and implements schematic block diagram;
Fig. 2: the non-flammable conducting liquid Leak Detection relay of hyperchannel described in the utility model is implemented schematic block diagram;
Fig. 3: the non-flammable conducting liquid Leak Detection relay construction schematic block diagram of hyperchannel described in the utility model;
Fig. 4: the power supply circuit of the non-flammable conducting liquid Leak Detection relay of hyperchannel described in the utility model;
Fig. 5: the testing circuit figure of the non-flammable conducting liquid Leak Detection relay of hyperchannel described in the utility model;
Fig. 6: the relay unit circuit diagram of the non-flammable conducting liquid Leak Detection relay of hyperchannel described in the utility model;
Fig. 7: the warning indicating member circuit diagram of the non-flammable conducting liquid Leak Detection relay of hyperchannel described in the utility model;
Fig. 8: the control module circuit diagram of the non-flammable conducting liquid Leak Detection relay of hyperchannel described in the utility model;
Fig. 9: the sensitivity control circuit figure of the non-flammable conducting liquid Leak Detection relay of hyperchannel described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.
The present embodiment is a meeting room, to the chilled water Leak Detection of five air outlets of its central air conditioner.
As shown in Fig. 2～Fig. 9, the non-flammable conducting liquid of hyperchannel described in the utility model detects relay, comprises detecting unit 1, power supply unit 2, warning indicating member 4 and relay unit 5.
Described power supply unit 2, for supplying with the required power supply in each working cell of the non-flammable conducting liquid Leak Detection relay of hyperchannel inside.
As shown in Figure 4, described power supply unit comprises Voltage stabilizing module, direct current module and alternating current module;
Described Voltage stabilizing module comprises the first voltage stabilizing diode Z3, the second voltage stabilizing diode Z4, the 3rd voltage stabilizing diode Z5 and the first fixed resistance PR6, described the first voltage stabilizing diode Z3 and the second voltage stabilizing diode Z4 are arranged in parallel, and after described the 3rd voltage stabilizing diode Z5 connects with the first fixed resistance PR6, are arranged in parallel with the second voltage stabilizing diode Z4; Described the first power supply output point is arranged on the intersection point of the negative pole of the first voltage stabilizing diode Z3 and the negative pole of the second voltage stabilizing diode Z4; For other unit provides stable direct current 24V voltage, described second source output point is arranged on the negative pole of the 3rd voltage stabilizing diode Z5 and the intersection point of the first fixed resistance PR6; For other unit provides stable direct current 5V voltage, the plus earth line of described the first voltage stabilizing diode Z3, the second voltage stabilizing diode Z4 and the 3rd voltage stabilizing diode Z5;
Described the first voltage stabilizing diode Z3 two ends are also arranged in parallel to be useful on and cut off galvanic the first electrochemical capacitor PC;
Described direct current modular power source signal, by the second pin of a tripod joint J1, enters into Voltage stabilizing module through the 8th resistance DR, finally from the first power supply output point 24VCC and second source output point VCC output;
Described alternating current module comprises high-frequency transformer, switching power source chip and diode, and its power supply signal is the concussion control to high-frequency transformer, the rectification of diode by switching power source chip, the direct current of stable output.
The power supply signal of described alternating current module is linked into alternating current module by the 3rd pin of the joint J1 of a tripod, and successively through the 7th fixed resistance FR and the first diode D1, be connected to one end of the primary coil of a transformer T1, the other end of described transformer T1 primary coil is connected with the drain lead D of switching power source chip PU1, and the 5th diode D6 that one end of the secondary coil of described transformer T1 arranges by a forward is connected with the negative pole of the first voltage stabilizing diode Z3 of Voltage stabilizing module; The other end of the secondary coil of described transformer T1 is connected with ground wire.
The two ends of described the 5th diode D6 are parallel with one second fixed resistance PR3 and the first capacitor P C4, described the second fixed resistance PR3 setting of connecting with the first capacitor P C4, described the first fixed resistance PR3 is connected with the positive pole of the 5th diode D6, and described the first capacitor P C4 is connected with the negative pole of the 5th diode D6.
Described switching power source chip enable or under-voltage pin EN/UV is connected with the negative pole of the first diode D1 with the 6th resistance PR1 by the 5th resistance PR2; Described enable or under-voltage pin EN/UV is also connected with a photo-coupler OP1, finally be connected with the negative pole of the 5th diode D6 by the 3rd fixed resistance PR4, the other end of described photo-coupler OP1 output is connected with ground wire by the 4th voltage stabilizing diode Z2 of a reversal connection; The two ends of described photo-coupler OP1 output are connected with one the 4th fixed resistance PR5; The other end of described photo-coupler OP1 input is connected to by one second electrochemical capacitor PC2 in the bypass or multi-functional pin BP/M of switching power source chip; The described photo-coupler OP1 electric current of control inputs switching power source chip effectively, makes it in enabling or the threshold range of under-voltage pin EN/UV.
The source lead S of described switching power source chip connects with the negative pole of the second electrochemical capacitor being connected on bypass or multi-functional pin BP/M; The source lead S of described switching power source chip is connected with the first pin of power supply input tripod joint J1 by the second diode D3.
Between the two ends of described transformer T1 primary coil, be provided with a forward the 5th voltage stabilizing diode Z1 and reverse a 4th diode D5 for overvoltage protection.
Between the negative pole of the positive pole of described the first diode D1 and the second diode D3, be provided with one for regulating the regulating resistance VRT1 of alternating current blocks current.
The positive interpolar of the negative pole of described the first diode D1 and the second diode D3 is provided with a 3rd electrochemical capacitor PC1 for filtering.
On intersection point between described regulating resistance VRT1 and the second diode D3, be connected with a 3rd diode D7 for rectification, the positive pole of described the 3rd diode D7 is connected with ground wire.
The access voltage of described alternating current module is 85V～265V, and the access voltage of described direct current module is 24V ± 15%.The utility model, through the effect of voltage stabilizing, rectification and the filtering of power supply unit, changes into galvanic current source by AC power, and for the power supply of direct access direct current, directly output after voltage stabilizing, for other unit provides stable 24V and 5V direct supply.
Described detecting unit, comprises somely for the sensor of liquid detecting with for to sensor signal analyzing and processing, and signal is transferred to the testing circuit of control module;
Testing circuit comprises the passage of some parallel connections as shown in Figure 5, the signal input part of each passage is connected with corresponding sensor, the signal that the signal input part of described each passage receives is through the filtering processing of the 3rd capacitor C 5 and the 9th fixed resistance R1, enter into the base stage of triode Q2, collector by triode Q2 exports control module to, the emitter of described triode Q2 is connected with ground wire, the collector of described triode Q2 is connected with power supply VCC through 1 the tenth resistance R 6, described power supply VCC is connected with the output terminal of feed circuit, described signal output part is arranged on the inter-collector of the tenth resistance R 6 and triode Q2.Described testing circuit is determined the quantity of testing circuit parallel connection according to the quantity of sensor 11, in the present embodiment, need to detect five positions simultaneously, therefore be provided with five sensors 11, adopt accordingly five testing circuits to be arranged in parallel, can be according to the quantity of user's the quantity that sensor 11 need to be set and corresponding testing circuit parallel connection, can be two, three, four, six, seven etc.
As shown in Figure 8, described control module, for receiving after the leak of liquid signal of testing circuit feedback, carries out Treatment Analysis to signal, sends control signal to relay unit; Described control module is AVR High Speed Microcontroller, adopts ATMEGA16_TQFP44 microcontroller in the present embodiment, but the utility model is not limited only to use the microcontroller of this model, also can use other can realize the microcontroller of said function.The pin of described control module is connected with respectively the output terminal of relay unit and testing circuit.
As shown in Figure 6, described relay unit, carries out the closure of corresponding normally opened contact or opening of normally closed contact after receiving control signal, with connection or the cut-out of control circuit; The J5 end of described relay unit is connected with control module, and the output terminal J2 of relay unit is connected with warning indicating member.The output terminal of described relay also can be connected with central air conditioner, in the time receiving leakage signal, central air conditioner can be disconnected, and quits work, and simultaneously corresponding alarm lamp also lights.
As shown in Figure 7, described warning indicating member, the alarm lamp of described warning indicating member is arranged on detection position, after warning indicating member receives the alerting signal of relay, open bright or extinguish the pilot lamp of corresponding sense channel, described warning indicating member comprises some parallel ports, the pilot lamp that is provided with fixed resistance R11 on each passage and connects with described fixed resistance.
As shown in Figure 9, between described sensor and testing circuit, be provided with a sensitivity control module, regulate the sensitivity of sensor according to the liquid detecting, described sensitivity control module comprises 1 the 12 fixed resistance R19, the one second adjustable resistor VR1 that are cascaded and the multi-channel interface J6-1 being connected with the each channel signal input point of testing circuit, and one end of described multi-channel interface J61 is connected with the adjustable side of the second adjustable resistor VR1.
The principle of work that the non-flammable conducting liquid of hyperchannel described in the utility model detects relay is:
Sensor 11 is set respectively on the water pond of five air outlets of central air conditioner, each sensor transfers to the signal detecting the signal input part of testing circuit 12, after processing after filtering, signal is amplified and transferred in control module through triode, control module by analysis, determine that the signal receiving is leakage signal, it is pilot relay action, make the contact of relay close or disconnect, thereby control the pilot lamp conducting of reporting to the police on phase sense channel in indicating member or extinguish, playing the effect of alarm.The needed power supply VCC of described control module, relay and warning indicating member is provided by feed circuit, described feed circuit can access direct supply or AC power according to actual conditions, direct supply is directly output after voltage stabilizing, alternating current module comprises high-frequency transformer, switching power source chip and diode, its power supply signal is the concussion control to high-frequency transformer, the rectification of diode by switching power source chip, the direct current of stable output.
The utility model is applicable to DC circuit and alternating circuit, the electricity that do not need to increase exchanges converts galvanic adapter to, simplify implementing circuit, multichannel being arranged in parallel, a relay can be realized multichannel detection, and corresponding sense channel can be set according to actual needs, saves construction cost, and detection sensitivity is high, can be widely used in the detection of non-flammable conducting liquid.
Other structure that described in the present embodiment, the non-flammable conducting liquid of hyperchannel detects relay is referring to prior art.
The above, it is only preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, do not depart from technical solutions of the utility model content therefore every, any amendment, equivalent variations and the modification above embodiment done according to technical spirit of the present utility model, all still belong in the scope of technical solutions of the utility model.
Claims (6)
1. the non-flammable conducting liquid of hyperchannel detects a relay, it is characterized in that: comprise power supply unit, detecting unit, relay unit, warning indicating member and control module;
Described power supply unit, for supplying with its required power supply in working cell, described power supply unit comprises Voltage stabilizing module, direct current module and alternating current module; Described power supply unit is provided with two power supply output points, comprises the first power supply output point and second source output point;
Described Voltage stabilizing module comprises the first voltage stabilizing diode, the second voltage stabilizing diode, the 3rd voltage stabilizing diode and the first fixed resistance, described the first voltage stabilizing diode and the use in parallel of the second voltage stabilizing diode, described the 3rd voltage stabilizing diode is arranged in parallel with the second voltage stabilizing diode after connecting with the first fixed resistance; Described the first power supply output point is arranged on the negative pole intersection point of the first voltage stabilizing diode and the second voltage stabilizing diode; Described second source output point is arranged on the negative pole intersection point of the first fixed resistance and the 3rd voltage stabilizing diode;
Described direct current modular power source signal, by a tripod joint, enters into Voltage stabilizing module through the 8th resistance, the last direct current from the first power supply output point and second source output point stable output;
Described alternating current module comprises high-frequency transformer, switching power source chip and diode, and its power supply signal is the concussion control to high-frequency transformer, the rectification of diode by switching power source chip, the direct current of stable output;
Described detecting unit, comprises some sensors that detect for non-flammable conducting liquid and for to sensor signal analyzing and processing and signal is transferred to the testing circuit of control module, described testing circuit comprises some parallel ports, each passage comprises one the 3rd electric capacity that is arranged on its signal incoming end, one the 9th resistance and a triode, described signal incoming end is connected with described sensor, the signal of receiving sensor, signal is through the filtering processing of the 3rd electric capacity and the 9th resistance, enter into the base stage of triode, collector by triode exports control module to, the emitter of described triode is connected with ground wire, the collector of described triode is connected with power supply through 1 the tenth resistance, described power supply is connected with the output terminal of power supply unit, the signal output part that the non-flammable conducting liquid of described hyperchannel detects relay is arranged on the intersection point of the collector of the tenth resistance and triode,
Described control module, for receiving after the leak of liquid signal of testing circuit feedback, processes signal, sends control signal to relay unit;
Described relay unit, carries out the closure of corresponding normally opened contact or opening of normally closed contact after receiving control signal, to realize warning;
Described warning indicating member, comprises the pilot lamp being arranged on each passage, and described warning indicating member receives and opens after the alerting signal of control module bright or extinguish the pilot lamp of corresponding sense channel.
2. the non-flammable conducting liquid of hyperchannel detects relay according to claim 1, it is characterized in that: the power supply signal of described alternating current module is successively through the 7th fixed resistance and the first diode, be connected to one end of the primary coil of a transformer, the other end of described transformer is connected with the drain lead of switching power source chip, and the 5th diode that one end of the secondary coil of described transformer arranges by a forward is connected with the negative pole of the first voltage stabilizing diode of Voltage stabilizing module; The other end of the secondary coil of described transformer is connected with ground wire;
The two ends of described the 5th diode are parallel with one second fixed resistance and the first electric capacity, described the second fixed resistance and the first capacitances in series setting, described the first fixed resistance is connected with the positive pole of the 5th diode, and described the first electric capacity is connected with the negative pole of the 5th diode;
Described switching power source chip enable or under-voltage pin is connected with the negative pole of the first diode with the 6th fixed resistance by the 5th fixed resistance; Described enable or under-voltage pin is also connected with a photo-coupler, is finally connected with the negative pole of the 5th diode by the 3rd fixed resistance, and the 4th voltage stabilizing diode that the other end that described photo-coupler is exported passes through a reversal connection is connected with ground wire; The two ends of described photo-coupler output are connected with one the 4th fixed resistance; The other end of described photo-coupler input is connected to by one second electrochemical capacitor in the bypass or multi-functional pin of switching power source chip, and the source lead of described switching power source chip connects with the negative pole of the second electrochemical capacitor being connected on bypass or multi-functional pin; The source lead of described switching power source chip is connected with the pin of power supply input adapter by the second diode;
Described the first voltage stabilizing diode two ends are also arranged in parallel to be useful on and cut off galvanic the first electrochemical capacitor;
Between the two ends of described transformer, be provided with a forward the 5th voltage stabilizing diode and reverse the 4th diode for overvoltage protection;
Between the negative pole of the positive pole of described the first diode and the second diode, be provided with one for regulating the regulating resistance of alternating current blocks current;
The positive interpolar of the negative pole of described the first diode and the second diode is provided with the 3rd electrochemical capacitor for filtering;
On node between described regulating resistance and the second diode, be connected with the 3rd diode for rectification, the positive pole of described the 3rd diode is connected with ground wire.
3. the non-flammable conducting liquid of hyperchannel detects relay according to claim 2, it is characterized in that: the access voltage of described alternating current module is 85V～265V, and the access voltage of described direct current module is 24V ± 15%.
4. the non-flammable conducting liquid of hyperchannel detects relay according to claim 1, it is characterized in that: described detecting unit is provided with the sensitivity control circuit of the electric current for adjusting described sensor, described sensitivity control circuit comprises 1 the 12 fixed resistance and one second regulating resistance of connecting with described the 12 fixed resistance.
5. the non-flammable conducting liquid of hyperchannel detects relay according to claim 1, it is characterized in that: described control module is AVR High Speed Microcontroller.
6. the non-flammable conducting liquid of hyperchannel detects relay according to claim 1, it is characterized in that: it is that the non-flammable conducting liquid of Five-channel detects relay that the non-flammable conducting liquid of described hyperchannel detects relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086731.8U CN203869820U (en) | 2014-02-27 | 2014-02-27 | Multichannel incombustible conductive liquid detection relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086731.8U CN203869820U (en) | 2014-02-27 | 2014-02-27 | Multichannel incombustible conductive liquid detection relay |
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| CN203869820U true CN203869820U (en) | 2014-10-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703140A (en) * | 2017-09-27 | 2018-02-16 | 广东欧珀移动通信有限公司 | Feed liquor detection method, device, medium and the electronic equipment using methods described |
| CN110110838A (en) * | 2019-06-24 | 2019-08-09 | 电子科技大学中山学院 | Intelligent computable radio frequency identification tag |
| CN112448367A (en) * | 2019-09-02 | 2021-03-05 | 北京国电思达科技有限公司 | Detection control device and control method for converter |
-
2014
- 2014-02-27 CN CN201420086731.8U patent/CN203869820U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703140A (en) * | 2017-09-27 | 2018-02-16 | 广东欧珀移动通信有限公司 | Feed liquor detection method, device, medium and the electronic equipment using methods described |
| CN110110838A (en) * | 2019-06-24 | 2019-08-09 | 电子科技大学中山学院 | Intelligent computable radio frequency identification tag |
| CN112448367A (en) * | 2019-09-02 | 2021-03-05 | 北京国电思达科技有限公司 | Detection control device and control method for converter |
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| 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: 20141008 Termination date: 20190227 |