CN102735905A - Intrinsically safe isolation electric leakage detection device and excavation equipment - Google Patents
Intrinsically safe isolation electric leakage detection device and excavation equipment Download PDFInfo
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Abstract
The invention discloses an intrinsically safe isolation electric leakage detection device and excavation equipment. The intrinsically safe isolation electric leakage detection device comprises a power module, an isolation acquisition module, an electric leakage detection module and an isolation communication module, wherein the power module is provided with an intrinsically safe power supply and a non-intrinsically safe power supply which are isolated from each other and is used for supplying power to the intrinsically safe isolation electric leakage detection device; the isolation acquisition module is used for acquiring signals and switching the intrinsically safe power supply and the non-intrinsically safe power supply in an isolation mode; the electric leakage detection module is used for electric leakage detection and electric leakage protection; and the isolation communication module is used for outputting signals which are to be output by the isolation acquisition module and the electric leakage detection module. The excavation equipment is provided with the intrinsically safe isolation electric leakage detection device. The highly integrated and intelligent intrinsically safe isolation electric leakage detection device can overcome the defects of complicated circuits and large product size in the conventional electric leakage detection device and is high in reliability and convenient to use and apply, and the signals are convenient to acquire.
Description
Technical field
The present invention relates to engineering machinery field, particularly a kind of intrinsic safety is isolated earth detector and extractive equipment.
Background technology
At present, the colliery downhole data transmits the forms that adopt optical fiber or network more, and the detection of electrical leakage mechanical hook-ups that adopt similar isolating switch more.
Yet owing to have gas and dust under the coal mine, the voltage signal on the data circuit is lower, so interference free performance is eager to excel in whatever one does, just can meet application requirements.Data circuit adopts optical fiber or the transmission of network copper cable usually.Wherein, though Optical Fiber Transmission is far away, the conventional analogue fiber optic adopts frequency modulation (FM) and two kinds of standards of amplitude modulation (AM), and there are shortcomings such as electromagnetic interference (EMI) is big between plate, equipment power dissipation is big, small product size is big in this.Not only transmission range is short, confidentiality is poor, receive electromagnetic interference (EMI) easily and adopt the network copper cable, and then causes communication not smooth, even the circuit paralysis etc., and high the reaching of maintenance cost is prone to obliterated data etc.
In addition, general earth leakage protective device impels topworks's action through detecting, handling this abnormal current or voltage signal, and existing earth detector physical dimension is bigger, is difficult for moving, and uses inconvenience.Because earth leakage protective device is installed in the low-voltage circuit, so earth leakage protective device damages, artificial releasing operation phenomenon is very serious.Thus it is clear that, electricity consumption harm problem, the still sternness of safety utilization of electric power problem.
Summary of the invention
In view of this, the present invention proposes a kind of highly integrated, intelligentized intrinsic safety and isolates earth detector, to eliminate the drawback that circuit is loaded down with trivial details, product size is big in the existing earth detector.The present invention also provides a kind of extractive equipment that said intrinsic safety is isolated earth detector that is provided with.
For achieving the above object, technical scheme of the present invention is achieved in that
On the one hand, the invention provides a kind of intrinsic safety and isolate earth detector, this device is provided with: acquired signal also realizes intrinsic safety and the isolation acquisition module of non-intrinsic safety isolation conversion; Detection of electrical leakage and earth leakage protective detection of electrical leakage module; Export said isolation acquisition module, detection of electrical leakage module Signal Processing isolated communication module to be exported; Have the intrinsic safety electric source of mutual isolation and the power module of non-intrinsic safety electric source, be said isolation acquisition module, said detection of electrical leakage module, said isolated communication module for power supply.
Preferably, said apparatus also comprises: signal processing module, and the input end of this signal processing module is connected with said isolation acquisition module, detection of electrical leakage module, and the output terminal of this signal processing module is connected with said isolated communication module.
Preferably, in the said apparatus, said power module also comprises the isolating converter that said non-intrinsic safety electric source, said intrinsic safety electric source are isolated; Said intrinsic safety electric source is provided with output voltage and circuit, output current are set circuit are set and with said output voltage, electric current controlled constant-current source that circuit the is connected short-circuit protection circuit of holding concurrently are set.
Preferably, in the said apparatus, said isolation acquisition module is provided with: gather the switching value signal and realize intrinsic safety and the switching value isolation Acquisition Circuit of non-intrinsic safety isolation; Gather analog signals and realize intrinsic safety and the analog quantity isolation Acquisition Circuit of non-intrinsic safety isolation.
Preferably, in the said apparatus, said switching value is isolated Acquisition Circuit, said analog quantity is isolated Acquisition Circuit and is respectively arranged with the photoelectric isolating circuit of realizing isolating collection.
Preferably, in the said apparatus, said detection of electrical leakage module is provided with: the detection module that detects the electrical machine insulation situation; Whether normally determine whether the control module of starter motor according to the detected electrical machine insulation of detection module.
Preferably, in the said apparatus, said detection module further is provided with: the voltage-selected switch circuit that is used to select the detection of electrical leakage standard; Be used to select to specify the national selected on-off circuit of national detection of electrical leakage standard; Standard according to said voltage-selected switch circuit, the selection of national selected on-off circuit is judged the comparison output circuit of electrical machine insulation situation, and this compares output circuit and is connected with said voltage-selected switch circuit, national selected on-off circuit.
Preferably, in the said apparatus, said isolated communication module is for realizing isolating controller, CAN bus isolated communication module or the microrelay of output.
Preferably, in the said apparatus, said CAN bus isolated communication module is provided with: the controller of photoisolator, the band CAN communication function that is connected with photoisolator.
On the other hand, the present invention also provides a kind of extractive equipment, and this extractive equipment is provided with above-mentioned any intrinsic safety and isolates earth detector.
With respect to prior art, the present invention has following advantage:
Intrinsic safety of the present invention is isolated earth detector and is adopted modular circuit design, and wherein, power module adopts the intrinsic safety electric source and the non-intrinsic safety electric source of isolating each other, thereby improves device reliability.Isolate acquisition module and adopt photoelectric isolation technology, guarantee the integrality of acquired signal, the reliability of insulation blocking, and the conversion of the non-intrinsic safety signal of the intrinsic safety signal of application photoelectric isolation technology realization input and output, can avoid reversible interference to occur.
What deserves to be mentioned is that the intrinsic safety of the embodiment of the invention is isolated earth detector increases the electronic leakage measuring ability of multinomial selection through design detection of electrical leakage module, thereby reduced the mechanical type volume of device.
Extractive equipment of the present invention is provided with said intrinsic safety and isolates earth detector, has above-mentioned technique effect because said intrinsic safety is isolated earth detector, and therefore, said extractive equipment also should possess the corresponding techniques effect.
Description of drawings
The accompanying drawing that constitutes a part of the present invention is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 isolates the electrical principle block diagram of earth detector embodiment one for intrinsic safety of the present invention;
The signal flow that Fig. 2 isolates earth detector embodiment for intrinsic safety of the present invention is to synoptic diagram;
Fig. 3 isolates the electrical principle block diagram of earth detector embodiment two for intrinsic safety of the present invention;
Fig. 4 is the circuit diagram of embodiment of the invention intrinsic safety electric source;
Fig. 5 is the circuit diagram of the DC-DC isolating converter of the embodiment of the invention;
Fig. 6 is the circuit diagram of the detection of electrical leakage module of the embodiment of the invention;
Fig. 7 isolates the circuit diagram of earth detector alternative embodiment for intrinsic safety of the present invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the present invention can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
Basic thought of the present invention is: to the technical matters that exists at present, provide a kind of intrinsic safety to isolate earth detector, this device is provided with: (1) provides the intrinsic safety electric source of mutual isolation and the power module of non-intrinsic safety electric source, is this device safe power supply; (2) isolate acquisition module, realize the isolation collection of switching value/analog signals, the intrinsic safety and the non-intrinsic safety isolation features of switching value or analog quantity is provided; (3) have the electronic leakage measuring ability of selecting different examination criterias, carry out detection of electrical leakage and insulation blocking, can select to meet domestic/external detection of electrical leakage standard-required; (4) isolated communication module, output isolation signals and detection of electrical leakage signal.So, to reduce mechanical volume.
The intrinsic safety of the embodiment of the invention is isolated electric leakage device and is adopted the modular construction design; With signals collecting and isolation technology, signal processing technology, signal transmission and isolation technology, and multiple situation under the motor current leakage detection protection function of (as: voltage detecting standard 1140V/660V, domestic/external different insulation examination criteria) carry out integrated; This not only meets mining rugged surroundings request for utilization; And volume is little, and strong interference immunity, reliability be high, be easy to operation and maintenance, wire harness is simple.So, the embodiment of the invention is isolated electric leakage device through complete, highly integrated, the intelligentized intrinsic safety of a kind of function of design, has solved loaded down with trivial details, line is complicated, product size the is big drawback of present corresponding signal treatment circuit.
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are done further explain:
With reference to Fig. 1, it is for the electrical principle block diagram that intrinsic safety of the present invention is isolated earth detector embodiment one, and is as shown in Figure 1, and the intrinsic safety of present embodiment is isolated earth detector and is provided with: acquired signal also realizes the isolation acquisition module that the intrinsic safety isolation is changed; Detection of electrical leakage and earth leakage protective detection of electrical leakage module; Export the isolated communication module of said isolation acquisition module, detection of electrical leakage module signal to be exported; Have the intrinsic safety electric source of mutual isolation and the power module of non-intrinsic safety electric source, this power module is said isolation acquisition module, said detection of electrical leakage module, said isolated communication module for power supply.
In a preferred embodiment; Above-mentioned intrinsic safety is isolated earth detector also can comprise signal processing module; The input end of this signal processing module is connected with said isolation acquisition module, detection of electrical leakage module, and the output terminal of this signal processing module is connected with said isolated communication module.This signal processing module is used to handle the signal that said isolation acquisition module, detection of electrical leakage module spread out of, like the isolation signals that said isolation Acquisition Circuit is gathered, and the detection signal that said detection of electrical leakage module detects.
It is pointed out that said signal processing module is not essential, can select the signalization processing module when signal processing requirement.
Optional is; This signal processing module can be integrated in the isolated communication module, and at this moment, said isolated communication module can be used as the micro-control unit (MCU with communication function; Micro Control Unit) or central control unit (CPU); For example: the isolated communication module of present embodiment can be the MCU of band CAN communication function, and the MCU of band CAN communication function is through photoelectric isolating circuit and realize the CAN communication function for its corresponding program that designs, and data are handled, isolated and export.
Further, as shown in Figure 1, said power module comprises: non-intrinsic safety electric source, intrinsic safety electric source, the isolating converter that said non-intrinsic safety electric source and intrinsic safety electric source are isolated.In the present embodiment, intrinsic safety electric source and the non-intrinsic safety electric source of the mutual isolation through design are isolated earth detector for this intrinsic safety and are carried out safe power supply, not only meet national coal and pacify requirement, and can improve device reliability.
Need to prove; As shown in Figure 1, realize that acquired signal realizes that also intrinsic safety isolates the isolation acquisition module of conversion and further be provided with: gather the switching value signal and realize intrinsic safety the switching value of isolating with non-intrinsic safety and isolate Acquisition Circuit, and gather analog signals and realize intrinsic safety and the analog quantity isolation Acquisition Circuit of non-intrinsic safety isolation.In the present embodiment; Said switching value is isolated Acquisition Circuit, analog quantity is isolated Acquisition Circuit and comprised the photoelectric isolating circuit or the microrelay circuit of realizing isolating collection respectively; Through adopting photoelectric isolation technology, guarantee said isolation acquisition module collection switching value, the integrality of analog signals, the reliability of insulation blocking, mining security.
Wherein, said switching value is isolated the switching value signal that Acquisition Circuit can be used for gathering liquid level sensor, oil suction contaminant sensor etc.Said analog quantity is isolated the analog signals that Acquisition Circuit can be used for obliquity sensor, current sensor, voltage sensor, temperature sensor etc.
In the present embodiment, said detection of electrical leakage module is used to detect the electrical machine insulation situation and is used for whether normally determining whether starter motor according to the electrical machine insulation that detection module detects.Here give an example and be explained; For example: said detection of electrical leakage module cooperates with power contactor normally closed auxiliary contact through normal battle of auxiliary reclay; Before electric motor starting, obtain motor windings insulation against ground resistance signal,, send signal said signal processing module to handle back output through the photoelectricity isolation according to selected detection of electrical leakage standard determination electrical machine insulation situation; Perhaps, also can directly the detection of electrical leakage signal be exported with microrelay; Said then detection of electrical leakage module disconnection detection loop judges according to getting detection signal whether electrical machine insulation is normal, if normal starter motor, if provide warning, No starting motor unusually.
Here,, to being example the signal flow that the embodiment of the invention produced is described with signal flow illustrated in fig. 2:
In the present embodiment; Be provided with the intrinsic safety electric source of mutual isolation and the power module of non-intrinsic safety electric source safe power supply is provided; Said isolation acquisition module is isolated conversion through photoelectric isolating circuit to the intrinsic safety switching value signal, the intrinsic safety analog signals that collect; Convert the intrinsic safety Signal Spacing of input the non-intrinsic safety signal of output into, thereby realize switching value, analog Input Insulation Based collection; The detection of electrical leakage module detects based on the insulation situation of the set detection of electrical leakage standard of present embodiment to motor, and detected detection of electrical leakage signal is isolated conversion; Carry out logical process and output with accomplish isolating the MCU that signal after the conversion is sent to band CAN communication function, the corresponding output of present embodiment switching value, analog quantity, isolated can communication output signal arranged.
It is pointed out that said isolated can communication output signal can be through CAN control interface (CAN controller interface), respond optocoupler (Super High Speed Response OPIC Photocoupler) fast and export.
On the basis of above-mentioned each embodiment, other embodiment of the present invention are described below in conjunction with Fig. 3 to Fig. 6.
With reference to Fig. 3, the electrical principle block diagram that it isolates earth detector embodiment two for intrinsic safety of the present invention, main design two big module---power module and signals collecting, processing and output modules in the present embodiment two.
In the present embodiment; The intrinsic safety electric source of said power module is provided with that output voltage is provided with that circuit, output current are provided with circuit, compare to determine circuit, controlled constant-current source, short-circuit protection circuit; Wherein, circuit is set said output voltage and output current is provided with circuit jointly to controlled constant-current source control, handles through holding circuit again; Feed back to controlled constant-current source, final output and the intrinsic safety voltage and current that obtains requirement.Such as: the AC220V power supply obtains DC24V voltage through Switching Power Supply; Pass through the conversion of DC-DC (DC-to-dc) isolating converter again and obtain the DC15V power supply; Voltage-setting circuitry is decided to be 12V, and electric current is decided to be 1.2A, and acting in conjunction is in controlled constant-current source A, B; Holding circuit finally obtains the intrinsic safety electric source of DC12V, 1.2A.
As shown in Figure 3, the DC-DC power module of present embodiment also makes the intrinsic safety electric source that is designed meet the intrinsic safety electric source design standards through two controlled constant-current source A, B of control series connection.Preferably, controlled constant-current source A, B are with the function of short-circuit protection.Like this, just, can obtain to have the intrinsic safety electric source and the non-intrinsic safety electric source of mutual isolation features.
Here combine an instance that said power module is described further; With reference to Fig. 4; It obtains the circuit diagram of intrinsic safety electric source for present embodiment; It has provided said output current the circuit implementation that circuit, output voltage are provided with circuit, controlled constant-current source A, controlled constant-current source B has been set, and wherein the annexation between each electrical part can not described in detail it with reference to shown in Figure 4 here.
With reference to Fig. 5, it is the circuit diagram of the DC-DC isolating converter of present embodiment, and the annexation between each electrical part of DC-DC isolating converter can not described in detail it with reference to shown in Figure 4 here.
In the present embodiment, said signals collecting, processing and output module are provided with: be used to gather the switching value signal and realize that the switching value that intrinsic safety is isolated isolates Acquisition Circuit, is used to gather analog signals and realizes that the analog quantity that intrinsic safety is isolated is isolated Acquisition Circuit, band is selected detection of electrical leakage module, band CAN controller single chip circuit and CAN isolated communication module.
In the present embodiment; Said switching value is isolated Acquisition Circuit, analog quantity is isolated Acquisition Circuit and realized isolated from power through the DC-DC converter; And the conversion between the non-intrinsic safety signal of intrinsic safety signal of realizing importing through photoelectric isolating circuit and output, thereby realize switching value, analog Input Insulation Based collection.
For example: 0-5V power supply signal VCC after isolated variable circuit conversion such as SLC800, IB1212LS, is finally obtained the switching value signal through handling again.For the conversion of switching value signal, circuit or other isolating device with intrinsic safety switching value signal passes through optocoupler (as: 4N35) or made up by a plurality of optocouplers are transformed into non-intrinsic safety switching value signal.Similarly, for the conversion of analog signals, the intrinsic safety analog signals is transformed into non-intrinsic safety simulating signal through the good optocoupler (as: HCNR201) of the linearity.
In the present embodiment, said detection of electrical leakage module is used to carry out detection of electrical leakage and earth leakage protection, and said detection of electrical leakage module is set up the electronic leakage measuring ability of multinomial selection, thereby reduces the mechanical type volume of device, increases applicability.Wherein, said detection of electrical leakage module is provided with: detect the detection module of electrical machine insulation situation, whether normally determine whether the control module of starter motor according to the detected electrical machine insulation of detection module.
Further, multiple-choice electronic leakage measuring ability is set in the said detection module, said detection module further comprises:
Be used to select the voltage-selected switch circuit of the voltage of detection of electrical leakage standard;
Be used to select to specify the national selected on-off circuit of national detection of electrical leakage standard;
Said voltage-selected switch circuit, national selected on-off circuit act on the input end of the comparison output circuit of judging the electrical machine insulation situation respectively, and this compares output circuit and is connected with said voltage-selected switch circuit, national selected on-off circuit.
Here combine an instance that the detection of electrical leakage module of present embodiment is described further:
With reference to Fig. 6; It is the circuit diagram of present embodiment detection of electrical leakage module; Said detection of electrical leakage module cooperates with power contactor normally closed auxiliary contact through normal battle of auxiliary reclay; Before startup, obtain motor windings insulation against ground resistance signal, select circuit (like said voltage (660V/1140V) selected on-off circuit, said country (as: China/Russia) selected on-off circuit) and compare output circuit, judge the insulation situation of said motor through switch; Through the photoelectricity isolation method detection signal is delivered to signal processing module (like band CAN controller single chip circuit) and handle, also can directly said detection signal be exported with microrelay.First then disconnection detection loop judges by said detection of electrical leakage module, controller whether electrical machine insulation normally determines whether starter motor again.If electrical machine insulation is normal, then said detection of electrical leakage module controls controller starter motor; If electrical machine insulation is unusual, then said detection of electrical leakage module controls controller provides warning, the No starting motor.
Should be understood that; The detection of electrical leakage of mining motor has standard; The resistance value of various countries regulations is different, but is the winding insulation resistance of measuring motor basically, if testing result qualified (as recording the resistance value that detection signal is higher than regulation) then allow starter motor; Otherwise the newspaper electric leakage does not allow starter motor.In general; Voltage standard in Chinese detection of electrical leakage is: the winding resistance of motor is 40K Ω during 1140V; The winding resistance of motor is 22K Ω during 660V; And also there are oneself detection of electrical leakage standard such as Russia in other countries: the winding resistance of motor is 100K Ω during 1140V, and the winding resistance of motor is 30K Ω during 660V.
Therefore, present embodiment designs a kind of switch and selects circuit, and this switch selects circuit to comprise voltage-selected switch circuit K1, national selected on-off circuit K2, and is as shown in Figure 6, U
1, U
2For the examination criteria of the corresponding different voltages among the voltage-selected switch circuit K1 of present embodiment, like 1140V and 660V.G
In, G
xFor the examination criteria of country variant corresponding among the national selected on-off circuit K2 of present embodiment, like China, Russia etc.Also can increase the setting of examination criteria as required here, as increase the examination criteria of corresponding different voltages, the examination criteria that country is specified in increase, so present embodiment is not done qualification to the set-up mode and the quantity of each examination criteria.
In the present embodiment, said isolated communication module is for realizing isolating the CAN bus isolated communication module or the microrelay of output.It is pointed out that said CAN bus isolated communication module is provided with: photoisolator, the band CAN controller (as: TM320LF2407) that is connected with photoisolator, CAN transceiver (as: TJA1050 or PCA82C250 high-speed CAN transceiver).Wherein, realize CAN isolated communication function through the corresponding program of being with CAN controller and photoisolator, CAN transceiver and designed.Need to prove that the band CAN controller single chip circuit and the CAN isolated communication module of present embodiment can be integrated into a module, as CAN bus isolated communication module, to save mechanical space, to maintain easily.
Alternative is; The circuit of above-mentioned each embodiment of the present invention and components and parts can design voluntarily; Can adopt also that some resolution elements such as isolated gate, programmable logic controller (PLC) (PLC) or nonshared control unit, intrinsic safety electric source, non-intrinsic safety electric source, isolation detection module, CAN division board, Signal Spacing plate etc. and connection cable etc. are reequiped, built, integrated back forms; Concrete annexation can be referring to shown in Figure 7, and present embodiment does not limit this.
Here; Main devices to shown in Figure 7 explains that once CPU (central processing unit)/DSP (digital signal processing) contains the CAN controller and has pin: the pin P17 of VCC, TX1, RX1, GND and the input of access analog quantity, the pin P11 of access switching value input.Optocoupler 6N137 has 8 pins, and wherein pin 1 is not connected with pin 4, and pin 2,3 is respectively positive and negative input end, and pin 5 is an earth terminal, and pin 6 is an output terminal, and pin 7 is an Enable Pin, and pin 8 is a power end.CAN bus driver TJA1050T has 8 pins, and its concrete annexation is as shown in Figure 7.
There is above-mentioned each embodiment visible; The intrinsic safety of the embodiment of the invention is isolated circuit such as DC-DC converter, the output voltage of earth detector through module design and is provided with that circuit, output current are provided with circuit, compare to determine circuit, controlled constant-current source is held concurrently short-circuit protection circuit etc.; Obtain the intrinsic safety electric source and the non-intrinsic safety electric source of isolation each other; Thereby the raising device reliability satisfies relevant mining standard-required.
Especially, the intrinsic safety of the embodiment of the invention is isolated earth detector and is adopted photoelectric isolation technology, guarantees to gather switching value, the integrality of analog signals, the reliability of insulation blocking.And the isolation conversion of the intrinsic safety signal of application photoelectric isolation technology realization input and the non-intrinsic safety signal of output can avoid reversible interference to occur.
What deserves to be mentioned is that the intrinsic safety of the embodiment of the invention is isolated earth detector increases the electronic leakage measuring ability of multinomial selection through design detection of electrical leakage module, thereby reduced the mechanical type volume of device.
In addition, isolation signals and detection of electrical leakage signal are sent to equipment, strengthen anti-interference function, reduce line, increase reliability, testing result is sent through the CAN bus, strengthen anti-interference function through the CAN bus.
Therefore, the present invention isolates earth detector through complete, highly integrated, the intelligentized intrinsic safety of a kind of function of design, can solve loaded down with trivial details, the reliability of present corresponding signal treatment circuit, the drawback of poor expandability.The present invention can adopt through a series of light emitting diodes and provide corresponding indication, and for example: whether the transmitting-receiving of signal input state, output state, CAN bus, power supply be normal etc.Intuitive and reliable, meet mining rugged surroundings request for utilization, wire harness is simple, the convenient use.
The embodiment of the invention also provides a kind of extractive equipment; Any intrinsic safety that this extractive equipment is provided with in the foregoing description is isolated earth detector; Have above-mentioned technique effect because above-mentioned any intrinsic safety is isolated earth detector, therefore, the extractive equipment that is provided with intrinsic safety isolation earth detector also should possess the corresponding techniques effect; Its practical implementation process is similar to the above embodiments, does not give unnecessary details now.
It is pointed out that in the present embodiment that said extractive equipment can comprise coalcutter, development machine etc.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an intrinsic safety is isolated earth detector, it is characterized in that this device is provided with:
Acquired signal also realizes intrinsic safety and the isolation acquisition module of non-intrinsic safety isolation conversion;
Detection of electrical leakage and earth leakage protective detection of electrical leakage module;
Export the isolated communication module of said isolation acquisition module, detection of electrical leakage module signal to be exported;
Have the intrinsic safety electric source of mutual isolation and the power module of non-intrinsic safety electric source, be said isolation acquisition module, said detection of electrical leakage module, said isolated communication module for power supply.
2. intrinsic safety according to claim 1 is isolated earth detector; It is characterized in that; This device also comprises: signal processing module; The input end of this signal processing module is connected with said isolation acquisition module, detection of electrical leakage module, and the output terminal of this signal processing module is connected with said isolated communication module.
3. intrinsic safety according to claim 1 and 2 is isolated earth detector, it is characterized in that said power module also comprises the isolating converter that said non-intrinsic safety electric source, said intrinsic safety electric source are isolated;
Said intrinsic safety electric source is provided with output voltage and circuit, output current are set circuit are set and with said output voltage, electric current controlled constant-current source that circuit the is connected short-circuit protection circuit of holding concurrently are set.
4. intrinsic safety according to claim 1 and 2 is isolated earth detector, it is characterized in that said isolation acquisition module is provided with:
Gather the switching value signal and realize the switching value isolation Acquisition Circuit that intrinsic safety is isolated;
Gather analog signals and realize the analog quantity isolation Acquisition Circuit that intrinsic safety is isolated.
5. intrinsic safety according to claim 4 is isolated earth detector, it is characterized in that, said switching value is isolated Acquisition Circuit, said analog quantity is isolated Acquisition Circuit and is respectively arranged with photoelectric isolating circuit or the microrelay circuit of realizing that isolation is gathered.
6. intrinsic safety according to claim 1 and 2 is isolated earth detector, it is characterized in that said detection of electrical leakage module is provided with:
Detect the detection module of electrical machine insulation situation;
Whether normally determine whether the control module of starter motor according to the detected electrical machine insulation of detection module.
7. intrinsic safety according to claim 6 is isolated earth detector, it is characterized in that said detection module further is provided with:
Be used to select the voltage-selected switch circuit of detection of electrical leakage standard;
Be used to select to specify the national selected on-off circuit of national detection of electrical leakage standard;
Standard according to said voltage-selected switch circuit, the selection of national selected on-off circuit is judged the comparison output circuit of electrical machine insulation situation, and this compares output circuit and is connected with said voltage-selected switch circuit, national selected on-off circuit.
8. intrinsic safety according to claim 1 and 2 is isolated earth detector, it is characterized in that, said isolated communication module is for realizing isolating the controller local area network CAN bus isolated communication module or the microrelay of output.
9. intrinsic safety according to claim 8 is isolated earth detector, it is characterized in that said CAN bus isolated communication module is provided with: the controller of photoisolator, the band CAN communication function that is connected with photoisolator.
10. an extractive equipment is characterized in that, this extractive equipment is provided with like each described intrinsic safety of claim 1 to 9 isolates earth detector.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104569143A (en) * | 2014-12-02 | 2015-04-29 | 西安博深煤矿安全科技有限公司 | On-line monitoring system for flaw detection of steel wire rope for mines |
| CN109462896A (en) * | 2018-08-02 | 2019-03-12 | 上海隽玺电子科技有限公司 | One kind being used for the wireless isolated transmission module of explosion hazard area intrinsic safety information |
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| CN109462896A (en) * | 2018-08-02 | 2019-03-12 | 上海隽玺电子科技有限公司 | One kind being used for the wireless isolated transmission module of explosion hazard area intrinsic safety information |
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Application publication date: 20121017 |