CN209460349U - Passive compound sensor - Google Patents

Abstract

The utility model discloses passive compound sensor, including toroidal shell (100), setting in the intracorporal PCB circuit board of circular casing (2) and cohesion device (260).The PCB circuit board (2) is made of two pieces of circuit boards: first circuit board (21) and second circuit board (22).The cohesion device includes stroke guiding parts, push part and travel stop part, wherein the push part can make direction or the reciprocating motion to ring outside direction into ring；The travel stop part limits the maximum stroke movement of the push part；The PCB circuit board includes electric field electricity-fetching module, main control unit, temperature-measuring module and current measurement module.The utility model has reached the technical effect being firmly secured at the passive compound sensor on the tested contact.

Description

Passive compound sensor

Technical field

The utility model relates to for measuring current or voltage or being used to indicate the device (G01R of its presence or symbol 19/155), the utility model is further related to using directly to the temperature measurement (G01K based on thermo-responsive electric or magnetic element 7/00), the utility model more particularly to Intellisense ring, and in particular to for high-tension switch cabinet to contact state Intellisense Status monitoring ring.

Background technique

The prior art only has the monitoring of temperature to high-tension switch cabinet contact monitoring parameters substantially, however is only sentenced by temperature rise It is too single whether disconnected equipment breaks down, and is unable to judge accurately because of temperature rise caused by equipment fault or loaded in itself Normal temperature rise caused by big；Active and passive in power supply mode, active i.e. common battery power supply mode, battery makes With restricted lifetime, replacement trouble；It is passive to have electric current power taking technology, RFID technique, electric field power taking technology etc., and electric current takes electricity necessary Allow equipment have load running that could work, RFID technique reading antenna it is larger, installation is inconvenient, and in contrast, electric field takes electric skill Art only needs equipment live, while increasing reserve battery, and it is convenient to debug in the uncharged situation of equipment.

Patent document CN107422174A, CN202929096U, CN203289199U disclose the device of live detection, In, special document CN203289199U discloses a kind of this sensing electricity getting device for switch cabinet outlet cable live detection.By clamping Shape energy converter, controlled rectifier, rechargeable battery set and load are constituted, and the pincer energy converter is by pincerlike shell, A phase winding magnetic Core, A phase winding coil, B phase winding magnetic core, B phase winding coil, C phase winding magnetic core, C phase winding coil, output aviation plug group At.When on-site test, the pincerlike energy converter of the present apparatus is socketed in any position along tested cable, can incude three intersections Galvanic electricity.The three-phase alternating current incuded is sent into controlled rectifier rectification, the direct current after rectification can charge to battery pack, thus Quality power can be provided to load.Controlled rectifier includes control centre, the DC voltage after control centre sampling rectification, Compared with the DC voltage is carried out in real time with battery voltage, the angle of flow by adjusting controlled rectifier adjusts rectified voltage, To guarantee that rectified voltage is constant.

Utility model content

For overcome the deficiencies in the prior art, one of the purpose of this utility model is to propose passive compound sensor, It can be by measuring 2 parameters of load current and temperature, while judging whether equipment temperature rise is normal more rationally.

The two of the purpose of this utility model are to propose passive compound sensor, are able to carry out live detection, and issue Electrification warning.

The three of the purpose of this utility model are to propose passive compound sensor, and electric principle can be taken by voltage induced It carries out taking electricity, no matter whether equipment connects load, has no current by can get electric energy.

The four of the purpose of this utility model are to propose passive compound sensor, can be reliablely and stablely fixed on institute It states on tested contact.

The five of the purpose of this utility model are to propose passive compound sensor, can pass through the passive composite sensing of measurement The distance between device and moving contact judge whether moving contact shifts position onto, reduce because moving contact push away it is not in place caused by safe thing Therefore.

For this purpose, the utility model proposes passive compound sensor, including toroidal shell, PCB circuit board and cohesion device, In, the PCB circuit board and the cohesion device are arranged in the toroidal cavity of the toroidal shell, the toroidal shell Circumferential inner ring surface surrounds measurement space, and the passive compound sensor is fixed on tested contact by means of the cohesion device On, the tested contact passes through the measurement space, it is characterised in that:

The PCB circuit board is made of two pieces of circuit boards: first circuit board and second circuit board；

The PCB circuit board includes electric field electricity-fetching module, main control unit, temperature-measuring module and current measurement module；Institute It states temperature-measuring module and the current measurement module is connect with the main control unit；The electric field electricity-fetching module is for obtaining Take induced voltage；The temperature-measuring module is used to detect the temperature value of the tested contact；The current measurement module is by institute The IO control power supply of main control unit, and access differential ADC collection voltages are stated, the load electricity of the tested contact is thus calculated Stream.

Other technical solutions according to the present utility model can also include that one or more technologies described in lower section are special Sign.So long as technical characteristic combination be it is enforceable, the new technical solution thus formed belongs to the utility model A part.

Compared with prior art, the utility model has the beneficial effects that:

The passive compound sensor of the utility model takes electric principle to carry out taking electricity by voltage induced, and no matter whether equipment connects Upper load has no current by can get electricity, there is certain advantage compared to electric current power taking technology.There is reserve battery simultaneously, when It can still test whether to install when equipment under test is not charged, whether signal can send out；

Judge whether equipment temperature rise is normal more rationally simultaneously by measurement 2 parameters of load current and temperature, it is single Temperature can not judge that equipment is because failure causes high temperature or causes greatly because loading, while measuring load current and knowing Road, the small temperature height of load current are that there are failures for equipment, and the big temperature of load current is relatively high certainly, are belonged to normal.Phase Previous single temperature is measured, the utility model has more advantage；

The perception annulus of the utility model has distance measurement function, is judged by measurement perception the distance between ring and moving contact Whether moving contact shifts position onto, reduces because moving contact pushes away caused safety accident not in place；

Scene electrification warning, after breaker pulls out, if equipment is still charged, present apparatus electrification warning lamp can dodge always It is bright, personal safety accident is avoided, and also there is electrification alarm signal on backstage and plays dual judgement.

Detailed description of the invention

Referring to attached drawing, the feature, advantage and characteristic of the utility model are able to by the description of following description It better understands, in attached drawing:

Fig. 1: the passive compound sensor of the utility model is installed in the preferred implementation side on high-tension switch cabinet contact The schematic diagram of formula；

Fig. 2: the perspective view of a preferred embodiment of the passive compound sensor of the utility model；

Fig. 3: another perspective view of a preferred embodiment of passive compound sensor shown in Fig. 2；

Fig. 4: another perspective view of a preferred embodiment of passive compound sensor shown in Fig. 2, wherein lid shell is moved It removes；

Fig. 5: another perspective view of a preferred embodiment of passive compound sensor shown in Fig. 2, wherein lid shell and bottom Shell is removed；

Fig. 6: the solid of a preferred embodiment of the push part of the cohesion device of passive compound sensor shown in Fig. 2 Schematic diagram；

Fig. 7: another stereoscopic schematic diagram of the push part of the cohesion device of passive compound sensor shown in Fig. 2；

Fig. 8: the top view of the push part of the cohesion device of passive compound sensor shown in Fig. 2；

Fig. 9: the main view of the push part of the cohesion device of passive compound sensor shown in Fig. 2；

Figure 10: the rearview of the push part of the cohesion device of passive compound sensor shown in Fig. 2；

Figure 11: the bottom view of the push part of the cohesion device of passive compound sensor shown in Fig. 2；

Figure 12: the A-A cross-sectional view of the push part of the cohesion device of passive compound sensor shown in Fig. 2；

Figure 13: the board structure of circuit schematic diagrames of passive compound sensor shown in Fig. 2；

Figure 14: the structural schematic diagram of the first circuit board of the circuit board of passive compound sensor shown in Fig. 2；

Figure 15: the structural schematic diagram of the second circuit board of the circuit board of passive compound sensor shown in Fig. 2；

Figure 16: the stereoscopic schematic diagram of the bottom case of passive compound sensor shown in Fig. 2；

Figure 17: the main view of the bottom case of passive compound sensor shown in Fig. 2；

Figure 18: the stereoscopic schematic diagram of the lid shell of passive compound sensor shown in Fig. 2；

Figure 19: the main view of the lid shell of passive compound sensor shown in Fig. 2；

Figure 20: the main view of passive compound sensor shown in Fig. 2, wherein lid shell is removed；

Figure 21: the electronic control principle schematic diagram of a preferred embodiment of the passive compound sensor of the utility model；

Figure 22: the electric field electricity-fetching module 200 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Circuit diagram；

Figure 23: the power management module 201 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Circuit diagram；

Figure 24: the electrification alarm module 202 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Circuit diagram；

Figure 25: the dual power supply switching module of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model 203 circuit diagram；

Figure 26: the battery back-up module 204 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Circuit diagram；

Figure 27: the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model takes piezoelectric voltage to acquire mould The circuit diagram of block 205；

Figure 28: the live detection module 206 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Circuit diagram；

Figure 29: the external reference power supply mould of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model The circuit diagram of block 207；

Figure 30: the temperature-measuring module 208 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Circuit diagram；

Figure 31: the distance-measurement module 209 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Circuit diagram；

Figure 32: the current measurement module 210 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Circuit diagram；

Figure 33: the radio receiving transmitting module 211 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Circuit diagram；

Figure 34: the electricity of the main control unit 212 of the PCB circuit board of passive compound sensor shown in Figure 21 of the utility model Lu Tu.

Same or similar element uses same numeral mark in the figure, and different elements uses different number marks Note, in which: 1, taking electrode；100, toroidal shell；101, circumferential inner ring surface；102, circumferential outer ring surface；103, toroidal cavity； 104, space is measured；105, lid side ring surface；106, bottom side anchor ring；120, passive compound sensor；131, the first tegmental wall plate；132, Second tegmental wall plate；151, the first lid limit body；161, First siding；162, second siding；163, the first cavity；164, One stroke space；165, second stroke space；181, First limit body；2, PCB circuit board；200, electric field electricity-fetching module； 201, power management module；202, alarm module is charged；203, dual power supply switching module；204, battery back-up module；205, it takes Piezoelectric voltage acquisition module；206, live detection module；207, external reference power module；208, temperature-measuring module；209, away from From measurement module；21, first circuit board；210, current measurement module；211, radio receiving transmitting module；212, main control unit；22, Two circuit boards；260, cohesion device；3, thermal conductivity copper piece；300, it is tested contact；301, the first contact zone；302, the second contact Area；303, third contact zone；5, mounting hole is charged；6, compressed spring；7, Fastener；71, the first straight wall；72, second upstanding wall； 73, the first cross wall；74, the second cross wall；75, third cross wall；8, bottom case；9, lid shell；

Referring to Fig. 2,3,17,20, the width of toroidal cavity 103 is defined as: on the radial cross-section of toroidal cavity 103, Width direction is consistent with radial direction, and short transverse is consistent with the central axial direction of the toroidal cavity 103.

Specific embodiment

Hereinafter, in conjunction with attached drawing and specific embodiment, the utility model is further described.

The prior art generally uses battery power supply mode to the measurement of switch cabinet static contact, and measurement parameter also only has temperature to survey Amount.Current sensor can not be monitored and indicate to electriferous state, can cause personal safety if there is electrification maloperation Accident.It can very good solution this problem with the measurement of many kinds of parameters of the utility model, the sensor with electrification warning.

Technology design main points:

Passive is realized using electric field power taking technology；

Electrification warning prevents electrification maloperation, protects personal safety；

Load current and temperature synchro measure, the more health status of accurate judgement equipment；

The distance between measurement and moving contact, judge whether breaker shifts position onto time, and protection equipment avoids the occurrence of thing Therefore.

Referring to Figure 21, the PCB circuit board 2 of the passive compound sensor 120 of the utility model mainly includes that electric field takes electricity, band Electric warning, power management, dual power supply switching, reserve battery, live detection, main control unit 212, range measurement, current measurement, temperature Spend measurement, wireless receiving and dispatching totally 11 modules.The connection relationship of each module is: electric field electricity-fetching module 200 includes 2 parts, a part Electrification instruction is carried out, a part exports a stable voltage value to dual power supply switching module by power management module 201 203, it is switched over forming dual power supply between reserve battery；Live detection module 206 detects electric field and takes the power supply after electricity Whether management module 201 is charged, and electrification then generates a trigger signal to the main control unit 212；The main control unit 212 is surveyed Amount and treatment temperature measurement module 208, current measurement module 210, the temperature of distance-measurement module 209, electric current and range data； Radio receiving transmitting module 211 sends the various parameters that the main control unit 212 acquires.

Wherein the function of each functional module is as follows:

1) electric field takes electricity: obtaining induced voltage；

2) electrification warning: after having sensed electricity, indicator light flashing carries out electrification prompt, avoids electrification maloperation；

3) power management: the induced voltage that will acquire is stored and is used through management one stable electricity of circuit output It presses and powers to late-class circuit；

4) reserve battery: when tested contact 300 is not charged, the energy is provided with reserve battery；

5) dual power supply switches: the electric field electricity-fetching module 200 reaches the voltage that can be exported and just exports electric field acquisition voltage, no Then reserve battery is powered；

6) live detection: generating interrupt signal for detecting whether electric field obtains enough energy, and to main control chip, in It is disconnected to judge it is electric field power supply or battery power supply, the information after judgement is sent out by the radio receiving transmitting module 211 After know whether equipment under test charges, can play a warning role, electrification alarm module 202 need to open cabinet door and shake out open circuit Device can just see that this information can check from the background；

7) temperature measures: the temperature of the perception tested contact 300 is simultaneously converted into voltage output；

8) current measurement: the changes of magnetic field of the perception tested contact 300 passes through the electric current relationship energy directly proportional to magnetic field Measure electric current；

9) range measurement: the distance between perception acting arm and intelligent ring determine whether acting arm shifts position onto；

10) main control unit 212: acquiring and calculate temperature, electric current, distance and electriferous state, controls described wireless Transceiver module 211 transfers out data；

11) measurement parameter wireless receiving and dispatching: is transferred to reception device.

Referring to Fig. 4,5,20,22, the direct thermal contact conductance conduction copper piece 3 of the connecting pin HV of rectifier bridge D6, the company of rectifier bridge D2 It meets end HG to be connected on one piece of moderate metal sheets of area such as taking electrode 1, the connecting pin HG and the connecting pin HV shape At induced voltage, takes electricity to carry out electrification by D3 flashing to the electrification alarm module 202 by rectifier bridge D2 all the way and mention Show, another way arrives capacitor C5 after rectifying by rectifier bridge D6 and carries out level-one energy storage, when tank voltage reaches high pressure diac It discharges after the discharge voltage of D4 discharge tube, high voltage low current is converted by low-voltage by inductor wire T1 pulse transformer High current selects, the too small leakage current conference shadow of voltage by voltage-stabiliser tube D7 such as 5.1V or more according to late-class circuit voltage Sound takes electrical efficiency, and overtension can burn late-class circuit, prevents overtension from burning late-class circuit, then to storage capacitor EC2 into The energy storage of row second level is powered to late-class circuit；The electric field electricity-fetching module 200 gets the voltage slowly risen, can not be directly to Rear class CPU power supply manages circuit by the thresholding of the power management module 201 and carries out voltage output, by R4, R7, R9 come Make-and-break voltage is adjusted, output voltage is a changing value, then carries out second level pressure stabilizing output by U5.The above circuit is in patent document It is introduced in " combined type trans system of the CN201610279259.3 based on electric field induction "；Voltage-stabiliser tube D7 with before Circuit is different.

EC3 is storage capacitor in battery back-up module 204, is connected in parallel with battery B1 and improves the discharge capability of battery, VIN1 in output voltage Vbat and the power management module 201 is respectively connected to 2 tunnels in the dual power supply switching module 203 It inputs, the first foot EN of dual power supply switching chip U1 selects IN1 by low and high level also in the dual power supply switching module 203 It is IN2 output, the IN1 of high level output, low level IN2 output.The low and high level of first foot EN from 201 thresholding management The 4th foot of the voltage comparator U3 of circuit exports, and can export high level after reaching output voltage, late-class circuit is just by electric field The electricity got is powered, and is otherwise battery powered；

Voltage acquisition bleeder circuit also referred to as takes piezoelectric voltage acquisition module 205, and the power management module 201 is taken To voltage by partial pressure after access the main control unit 212, the main control unit 212 can acquire this voltage and by the nothing Line transceiver module 211 is sent to reception device；Live detection down trigger module, the also referred to as described live detection module 206, It is to access the main control unit 212, the master after the output of voltage comparator U3 in thresholding management circuit to be connected to a resistance The IO foot of control unit 212 is set as interrupt mode, and high level triggering when charged can judge whether charge, and will charge shape State is sent to reception device by wireless module, may know that whether equipment under test charges by backstage.

External reference circuit, also referred to as external reference power module 207, as the reference voltage of simulation ADC acquisition, outside Portion is with reference to that more stable can make the parameter of acquisition more acurrate, in order to achieve the purpose that low-power consumption, the input pin of reference chip U11 It is controlled by the IO of main control chip, needs to carry out just to be powered when ADC acquisition.

The temperature-measuring module 208 directly contacts the tested contact 300 using contact temperature-measuring sensor and perceives institute State the temperature of tested contact 300, the power supply foot VDD that temperature measures chip U7 is controlled by the IO of main control chip, when temperature collection It powers on, achievees the purpose that low-power consumption.Contactless temperature-measuring device can also be changed to and carry out thermometric；

The distance-measurement module 209 be also by main control chip IO control power supply, acquisition apart from when just power supply；

The current measurement module 210 reaches low-power consumption by the IO power supply of the main control unit 212, accesses dedicated difference Divide ADC collection voltages and calculate the load current of the current tested contact 300, is carried out by load current and temperature dual Judge whether the fever of equipment is reasonable；

The radio receiving transmitting module 211 is communicated using 433MHz radio channel with radio receiver；

The main control unit 212 acquires the parameter of modules and calculating, and is sent by the radio receiving transmitting module 211 To receiving device, receiving device can Real time displaying also can transmit and carry out centralized displaying to backstage and carry out data analysis etc..

1, the passive compound sensor 120 of the utility model takes electric principle to carry out taking electricity by voltage induced no matter Whether equipment, which connects load, has no current by can get electricity, there is certain advantage compared to electric current power taking technology.Have simultaneously Reserve battery can still test whether to install when equipment under test is not charged, and whether signal can send out；

2, judge whether equipment temperature rise is normal more rationally simultaneously by measurement 2 parameters of load current and temperature, it is single Temperature can not judge equipment be because failure cause high temperature or because load cause greatly, while measure load current i.e. know Road, the small temperature height of load current are that there are failures for equipment, and the big temperature of load current is relatively high certainly, are belonged to normal.Phase Previous single temperature is measured, the utility model has more advantage；

3, the perception annulus of the utility model has distance measurement function, is sentenced by measurement perception the distance between ring and moving contact Whether disconnected moving contact shifts position onto, reduces because moving contact pushes away caused safety accident not in place；

4, scene electrification warning, after breaker pulls out, if equipment is still charged, present apparatus electrification warning lamp can dodge always It is bright, personal safety accident is avoided, and also there is electrification alarm signal on backstage and plays dual judgement.

Based on above-mentioned design concept, referring to figs. 1 to Figure 34, the passive compound sensor 120 according to the present utility model First embodiment, the passive compound sensor 120 include toroidal shell 100, the PCB circuit board 2 and cohesion device 260, wherein the PCB circuit board 2 and the cohesion device 260 are arranged on the toroidal cavity 103 of the toroidal shell 100 It is interior, the circumferential inner ring surface 101 of the toroidal shell 100 surround measurement space 104, the passive compound sensor 120 by means of The cohesion device 260 is fixed on the tested contact 300, and the tested contact 300 passes through the measurement space 104. Referring to Fig.1-4, the width of the radial section of the toroidal cavity 103 and height are configured to accommodate the cohesion device 260 and the PCB circuit board 2.The diameter in the measurement space 104 will be slightly larger than the diameter of the tested contact 300, such as greatly In 1 millimeter or between 1 millimeter to 1 centimetre.Referring to Fig. 2 and Fig. 3, the toroidal shell 100 also has circumferential outer ring surface 102, two side ring surfaces: lid side ring surface 105, bottom side anchor ring 106.It is understood that the toroidal shell 100 preferably circle institute State toroidal shell 100；Optional is the oval toroidal shell 100 or the polygon toroidal shell 100；Also the optional week is outside Anchor ring 102 is polygon, and the circumferential inner ring surface 101 is circle, and vice versa.

In order to reduce the height or thickness of the passive compound sensor 120,2-15 referring to Fig.1, the PCB circuit board 2 are made of two pieces of circuit boards: first circuit board 21 and second circuit board 22.Such design is so that the passive compound sensor 120 is more compact, and structure is more compact.It is understood that if desired, the PCB circuit board 2 can be by three pieces or four blocks of electricity Road board group is at they are respectively disposed on the different location of the toroidal cavity 103.

Preferably, referring to Figure 21,30,32, the PCB circuit board 2 includes the electric field electricity-fetching module 200, the master control Unit 212, the temperature-measuring module 208 and the current measurement module 210；The temperature-measuring module 208 and the electricity Flow measurement module 210 is connect with the main control unit 212；The electric field electricity-fetching module 200 is for obtaining induced voltage；It is described Temperature-measuring module 208 is used to detect the temperature value of the tested contact 300；The current measurement module 210 is by the master control The IO of unit 212 controls power supply, and access differential ADC collection voltages, thus calculates the load electricity of the tested contact 300 Stream.Such design make it possible to according to the temperature of the tested contact 300 and load current to the high-tension switch cabinet whether More specific and accurate judgement is made in failure.It is understood that difference ADC is a kind of ADC acquisition mode, using this Kind acquisition mode, a series of chips such as acquisition load current measurement chip such as TMR2505, TMR2501, TMR2503, measurement Range is different, and the output of such chip is a differential voltage, according to by the in different size of electric current, the voltage of output with The proportional variation of size of current, the main control unit 212 collect voltage effective value by difference ADC, are conversed by calibration Current value achievees the purpose that survey electric current.

The cohesion device 260 of passive compound sensor 120 described above is compact-sized, and part is few, reliable operation.

Referring to Fig. 4,5,20, the cohesion device 260 includes stroke guiding parts, push part and travel stop part, Wherein, the push part can make direction or the reciprocating motion to ring outside direction into ring；The stroke guiding parts can Make the motion guide of determining stroke to the reciprocating motion of the push part；The travel stop part limits the push part Maximum stroke movement.It is understood that into ring, direction is preferably pointing to the center of circle, optional slightly offset from the center of circle referring to Figure 20； It is preferably radially outside to ring outside direction, but can also be slightly offset from radial direction.The reciprocating motion is preferably along the toroidal shell 100 Radial direction back and forth move back and forth, it is optional back and forth to be moved back and forth slightly offset from radial work.Therefore, the design of the stroke guiding parts It is characterized by and guarantees that push part can form at least one contact zone on the outer surface of the tested contact 300, so that institute The tested contact 300 can be fixed on by stating passive compound sensor 120.Travel stop part makes same described passive Compound sensor 120 can be used in a series of tested contact 300 of different-diameters or size.The determining stroke corresponds to The maximum gauge for the tested contact 300 that can be measured and the difference of minimum diameter.The maximum stroke movement corresponds to The minimum diameter of the tested contact 300 of measurement.The maximum gauge for the tested contact 300 that can be measured is substantially equal to institute State the diameter in measurement space 104.

Preferably, referring to Fig. 4-Figure 12, the push part includes compressed spring 6 and Fastener 7, wherein the clamping The cross section outer profile of part 7, which has, removes "convex" shaped that last horizontal pen is drawn and inverted.Optionally referring to the institute of Fig. 6,7,11 Show, the shape that the Fastener 7 is substantially U-shaped, two branches can form two on the outer surface of the tested contact 300 Contact zone, so as to clamp the tested contact 300.Also, as shown in Fig. 7,8,9,10,20, the Fastener 7 has the One straight wall 71, the second upstanding wall 72 parallel with first straight wall 71, the first cross wall 73, the second cross wall 74 and third cross wall 75.First cross wall 73 connects first straight wall 71 and third straight wall 76, and it is straight that second cross wall 74 connects described second Wall 72 and the 4th straight wall 77, the third cross wall 75 connect the third straight wall 76 and the 4th straight wall 77.As shown in figure 12, described Compressed spring 6 is placed in the blind hole 78,79 of the Fastener 7.

Referring to Fig.1 7, the stroke guiding parts is made of two sidings: First siding 161 and second siding 162, Referring to Figure 20, two sidings are parallel to first straight wall 71 and the second upstanding wall 72 of the Fastener 7, and And the first cavity 163 is formed between two sidings, wherein first cavity 163 is for accommodating the push part.

Referring to Fig.1 6,17,20, the travel stop part includes First limit body 181 and second limit body, described First limit body 181 limits the maximum stroke movement of the push part, second limit body and first cross wall 73 form first stroke space 164, and second limit body and second cross wall 74 form second stroke space 165.Such as Figure 17, shown in 20, the First limit body 181 limits the measurement space 104 operation into ring of the push part Terminal, that is, the minimum diameter of the tested contact 300 that can be clamped.Referring to Figure 20, second limit body be can be It is integrally formed, is also possible to be divided into two parts.The compressed spring 6 is respectively arranged the first stroke space 164 and institute It states in second stroke space 165.

Preferably, referring to Fig. 4,20, the cohesion device 260 is placed in the toroidal shell 100 as follows In the toroidal cavity 103:

Referring to Fig.1 7,20, the width direction cloth of two sidings of the stroke guiding parts along the toroidal cavity 103 It sets, is extended from the circumferential inner ring surface 101 of the toroidal cavity 103 to the circumferential outer ring surface 102.It is understood that Two sidings also have certain altitude, thus also extend along the short transverse of the toroidal cavity 103.Two sidings Width can be less than or equal to the width of the toroidal cavity 103, height can be less than or equal to the toroidal cavity 103 Height.

Referring to Fig.1 7,20, the First limit body 181 of the travel stop part is placed in first cavity 163 It is interior, within the scope of the extended line that second limit body is disposed in two sidings surrounds, and with the clamping First cross wall 73 and second cross wall 74 of part 7 are facing.It is understood that 181 He of First limit body Second limit body, which can be connected by screw to, to be fixed in the toroidal shell 100, can also be with the toroidal shell 100 are integrally formed.Except the range that the extended line that second limit body extends to two sidings surrounds, but this The improvement of any function is not had.

Referring to Fig. 4,20, the Fastener 7 is placed in first cavity 163, wherein the institute of the Fastener 7 The free end of the free end and the second upstanding wall 72 of stating the first straight wall 71 can stretch to the measurement space 104；At least one The compressed spring 6 is respectively installed in the first stroke space 164 and the second stroke space 165, the compression bullet The elastic thrust of spring 6 is intended to for the Fastener 7 to be pushed into the measurement space 104.It is understood that in the first row Journey space 164 can install two, three or four compressed springs 6, similarly, can be in the second stroke space 165 Two, three or four compressed springs 6 are installed, clamping force can be increased in this way.It is of course also possible to only in the first row The compressed spring 6 is set in journey space 164 or the second stroke space 165.

Preferably, referring to Fig.1,2,3, the cohesion device 260 is tested contact 300 described in clamping as follows:

Referring to Fig. 3, Figure 20, the passive compound sensor 120 is socketed on the tested contact 300, the clamping The free end of first straight wall 71 of part 7 and the free end of the second upstanding wall 72 and the tested 300 outer surface shape of contact At two contact zones: the first contact zone 301 and the second contact zone 302；And described in the elastic thrust of the compressed spring 6 pushes Fastener 7 is moved into the measurement space 104, and then is pushed the tested contact 300 and reclined the institute of the toroidal shell 100 Circumferential inner ring surface 101 is stated, third contact zone 303, by means of three contact zones, the passive compound sensor 120 are formed It is fixed on the tested contact 300.Referring to Fig. 3,17,19,20, the circumferential inner ring wall body of the toroidal shell 100 or institute Stating at least has two apertures, free end and institute so as to first straight wall 71 of the Fastener 7 on circumferential inner ring surface 101 The free end for stating second upstanding wall 72 can pass through two apertures of the circumferential inner ring surface 101, put in the measurement space 104. Correspondingly, tool is there are two corresponding notch on the circumferential inner ring surface 101 of bottom case 8 shown in Figure 17, shown in Figure 19 There are two corresponding notch for tool on the circumferential inner ring surface 101 of lid shell 9, are combined into the bottom case 8 and the lid shell 9 described After toroidal shell 100, these notch combinations are at the aperture.

Preferably, referring to Fig.1 7,20, the push part can be initiatively along the diametrical direction of the toroidal shell 100 Make centripetal movement, also can the diametrical direction passively along the toroidal shell 100 make centrifugal movement.Due to the compressed spring 6 Elastic thrust, the Fastener 7 can move actively to ring heart direction, and only fight elastic thrust, could passively by The Fastener 7 is pushed back outward in the toroidal cavity 103.The push part is radially reciprocating to meet engineering design Principle, so that the cohesion device 260 works relatively reliable, enclasping force is bigger.

Preferably, the symmetrical center line of the Fastener 7 phase vertical with the center axis of symmetry of the toroidal shell 100 It hands over.Such design meets engineering design principle, so that the cohesion device 260 works relatively reliable, enclasping force is bigger.It is optional Ground, the center axis of symmetry oblique of the symmetrical center line of the Fastener 7 and the toroidal shell 100 or non-intersecting, in this way Design it is although feasible, but be not preferred.

Preferably, referring to Fig. 2,3,16-19, the toroidal shell 100 includes the lid shell 9 and the bottom case 8.Figure 16, 17 show the bottom case 8, and Figure 18,19 show the lid shell 9.Components are favorably installed to the annular by such two separation structure In cavity 103.It is understood that 9 height of lid shell or thickness can be less than or equal to the height or thickness of the bottom case 8 Degree.The lid shell 9 and the bottom case 8 are linked together by screw and/or buckle structure.

Preferably, the lid shell 9 and the bottom case 8 are made of high molecular material or composite material.It is good by insulating properties High molecular material or composite material, which make the toroidal shell 100, can be improved safety, work more reliable.

Preferably, the First limit body 181 of the travel stop part is inside along the week of the toroidal shell 100 Anchor ring 101 is arranged, also, the First limit body 181 and the bottom case 8 form an entirety by being molded mode. Since the bottom case 8 is high molecular material or composite material, integrally formed design can reduce amount of parts, reduce product Manufacturing cost.It is understood that if the thickness of the lid shell 9 is smaller, and the thickness of the bottom case 8 is larger, then First limits Position body 181 can be formed only on the bottom case 8.If the thickness of the lid shell 9 is substantially equal to the thickness of the bottom case 8, institute Stating travel stop part and stroke guiding parts can be respectively formed on the bottom case 8 and the lid shell 9, such as Figure 17,19 institutes Show, the travel stop part includes the first lid limit on First limit body 181 and the lid shell 9 on the bottom case 8 Body 151, after the lid shell 9 and the bottom case 8 are installed in place, the First limit body 181 and the first lid limit body 151 are collectively formed the restriction of the range to the Fastener 7.

Preferably, 6-19 referring to Fig.1, second limit body includes two parts: the first limiting section body 182A and second Limiting section body 182B, wherein 161 one entirety of formation of the first limiting section body 182A and the siding, second limit Second siding 162 of position portion body 182B and the siding forms an entirety.Since the bottom case 8 is high molecular material or is answered Condensation material, integrally formed design can reduce amount of parts, reduce cost of goods manufactured.It is understood that if described The thickness of lid shell 9 is smaller, and the thickness of the bottom case 8 is larger, then second limit body can the only shape on the bottom case 8 At.If the thickness of the lid shell 9 is substantially equal to the thickness of the bottom case 8, second limit body can be in the bottom case 8 It is respectively formed on the lid shell 9, as shown in Figure 17,19, second limit body includes the first limit on the bottom case 8 Third limiting section body 152A, the 4th limiting section body 152B on portion's body, the second limiting section body and the lid shell 9.Reference Figure 20, After the lid shell 9 and the bottom case 8 are installed in place, the first limiting section body, the second limiting section body and third limiting section body Bearing and position restriction to the compressed spring 6 is collectively formed in 152A, the 4th limiting section body 152B.

Preferably, 6-19 referring to Fig.1, the siding of the stroke guiding parts and the bottom case 8 are by being molded mode Form an entirety.Since the bottom case 8 is high molecular material or composite material, integrally formed design can reduce components Quantity reduces cost of goods manufactured.It is understood that if the thickness of the lid shell 9 is smaller, and the thickness of the bottom case 8 compared with Greatly, then the siding can be formed only on the bottom case 8.If the thickness of the lid shell 9 is substantially equal to the thickness of the bottom case 8 Degree, then the siding can be respectively formed on the bottom case 8 and the lid shell 9, and as shown in Figure 17,19, the siding includes 161, second sidings 162 of First siding on the bottom case 8 and the first tegmental wall plate 131, second lid on the lid shell 9 Siding 132.

Preferably, as shown in Fig. 2, the toroidal shell 100 further includes two symmetrical electrification mounting holes 5.In this way Design so that the tested contact 300 electrification in the case where the passive compound sensor 120 also can be safely installed.

Preferably, referring to Figure 21,24, the PCB circuit board 2 further includes the electrification alarm module 202；The electrification police Show that module 202 is connect with the electric field electricity-fetching module 200；The induced voltage that the electric field electricity-fetching module 200 obtains is output to The electrification alarm module 202；The electrification alarm module 202 is used to carry out when the induced voltage is higher than preset value luminous Instruction.Such design has reached the electrification warning effect to the tested contact 300.

Preferably, referring to Figure 21,33, the PCB circuit board 2 further includes the radio receiving transmitting module 211；The wireless receipts Hair module 211 is connect with the main control unit 212；The temperature value and the load current are sent to the main control unit 212, the temperature value and the load current are sent to outer by the main control unit 212 by the radio receiving transmitting module 211 The reception device in portion.Such design, which has reached, is sent to the temperature value of the tested contact 300 and the load current point It analyses the technical effect of the reception device such as computer of the more powerful outside of function, and is judging that the high-tension switch cabinet is from the background It is no that there are failures.

Preferably, referring to Figure 21,31, the PCB circuit board 2 further includes the distance-measurement module 209, wherein described Distance-measurement module 209 controls power supply by the IO of the main control unit 212, also, only has and be just powered when acquiring range information. Such design is by measuring the distance between the passive compound sensor 120 and the moving contact of high-tension switch cabinet to judge It states whether moving contact shifts position onto, reduces because moving contact pushes away caused safety accident not in place

Preferably, referring to Figure 21,23,25,26, the PCB circuit board 2 further includes the power management module 201, described Dual power supply switching module 203 and the battery back-up module 204, wherein the battery back-up module 204 includes storage capacitor EC3, the storage capacitor EC3 and battery B1 are connected in parallel, and improve the discharge capability of battery, output voltage Vbat and the electricity VIN1 in 201 circuit of source control module is respectively connected to the input of 2 tunnels in the dual power supply switching module 203；

The first foot EN of dual power supply switching chip U1 is selected by low and high level in the dual power supply switching module 203 IN1 or IN2 output, the IN1 of high level output, low level IN2 output；

Voltage ratio of the low and high level of the first foot EN from the thresholding management circuit of the power management module 201 The 4th foot output compared with device U3, high level can be exported after output voltage by reaching, and late-class circuit is just supplied by electricity that electric field is got Otherwise electricity is battery powered.

Such design guarantees in the case where electric field takes electric unsuccessful or high-tension switch cabinet to be in an off state, described passive compound Sensor 120 can also work normally.

Preferably, referring to Figure 21,27, the PCB circuit board 2 further includes described taking piezoelectric voltage acquisition module 205, wherein It is described to take piezoelectric voltage acquisition module 205 by voltage that the power management module 201 is got by accessing the master control after partial pressure Unit 212, the main control unit 212 can acquire this voltage and be sent to reception device by the radio receiving transmitting module 211. Such design is so that may know that whether equipment under test or high-tension switch cabinet charge by backstage computer or display device.

Preferably, referring to Figure 21,28, the PCB circuit board 2 further includes the live detection module 206, wherein described Live detection module 206 will access the master control list after output one resistance of series connection of voltage comparator U3 in thresholding management circuit Member 212, the IO foot of the main control unit 212 is set as interrupt mode, when charged high level triggering can judge whether band Electricity, and reception device is sent by the radio receiving transmitting module 211 by electriferous state, it may know that by backstage described tested Whether contact 300 charges.Such design is so that may know that equipment under test or height press off by backstage computer or display device Close whether cabinet charges.

Preferably, referring to Figure 21,29, the PCB circuit board 2 further includes the external reference power module 207, wherein Reference voltage of the external reference power module 207 as simulation ADC acquisition, external reference can be more stable, makes acquisition Parameter is more acurrate, and the input pin of Voltage Reference chip U11 is controlled by the IO of the main control unit 212, needs to carry out ADC It is just powered when acquisition.Such design can achieve the effect that low-power consumption.

Preferably, 4-15 referring to Fig.1, the electric field electricity-fetching module 200, the power management module 201 and the electrification Alarm module 202 is disposed on the first circuit board 21；The dual power supply switching module 203, the battery back-up module 204, the piezoelectric voltage acquisition module 205, the live detection module 206, the external reference power module 207, described of taking Temperature-measuring module 208, the distance-measurement module 209, the current measurement module 210, the radio receiving transmitting module 211, It is disposed on the second circuit board 22 with the main control unit 212.The radio receiving transmitting module 211 is also shown in Figure 15 to be made Antenna, spring antenna 211A.

Preferably, referring to Fig.1 5, the temperature-measuring module 208 includes contact temperature-measuring sensor；

Be disposed with the thermal conductivity copper piece 3 on 303 position of third contact zone, the thermal conductivity copper piece 3 because And it is directly contacted with the tested contact 300；

The thermal conductivity copper piece 3 is connected on the first circuit board 21, the contact of the temperature-measuring module 208 Temperature transducer is directly contacted with the thermal conductivity copper piece 3, and the temperature-measuring module 208 thus directly contacts described tested Contact 300 perceives the temperature of the tested contact 300.

It can protect contact temperature-measuring sensor from because described passive compound using the design of the thermal conductivity copper piece 3 Sensor 120 moves the friction damage during being installed on the tested contact 300.

Preferably, referring to Figure 22, the electric field electricity-fetching module 200 includes rectifier bridge D2, rectifier bridge D6 and voltage-stabiliser tube D7, Wherein, the voltage-stabiliser tube D7 is in parallel with storage capacitor EC2.The one of the electrical connection of each electronic component or electronic device is real The mode of applying is detailed in Figure 22, and I will not elaborate.

Preferably, by measuring 2 parameters of load current and temperature simultaneously, judge whether equipment temperature rise is normal；

In the case of and temperature small in load current is high, judging equipment, there are failures.

Preferably, referring to Fig. 4,5,22, the electric field electricity-fetching module 200 further includes the taking electrode 1, described to take electricity electricity Pole 1 is disposed in the toroidal cavity 103 of the toroidal shell 100, and along the circumferentially extending of the toroidal cavity 103, The length of taking electrode 1 described in the taking electrode 1 is greater than the half of the perimeter of the toroidal shell 100；

The connecting pin HV of the rectifier bridge D6 directly contacts the thermal conductivity copper piece 3, the connecting pin of the rectifier bridge D2 HG is connected to the taking electrode 1, and the connecting pin HG and the connecting pin HV form induced voltage.

Such design is so that compact-sized, reliable operation.

Preferably, referring to Figure 23, the power management module 201 includes voltage comparator circuit and voltage-stabilizing output circuit, In, the voltage comparator circuit includes resistance R4, resistance R5, resistance R7, resistance R9, capacitor C10 and voltage comparator U3, institute Stating voltage-stabilizing output circuit includes resistance R6, resistance R8 and voltage stabilizing chip U5；

The voltage comparator U3 adjusts output voltage VHI and shutdown voltage by resistance R4, resistance R7, resistance R9 VLO, wherein V_HI=V_REF R4+R7+R9/R9, V_LO=V_REF R4+R7+R9/R7+R9, VREF are voltage comparator Internal reference voltage；When VOUT tank voltage is higher than VHI, the 4th foot VEN of the voltage comparator U3 exports high level, when When the voltage value of VOUT is lower than VLO, the 4th foot exports low level 0；

Enable signal of the output VEN of the voltage comparator U3 as the voltage stabilizing chip U5, if the voltage compares Device U3 has output, and the voltage stabilizing chip U5 just exports a stable voltage and powers to late-class circuit.Each electronic component or One embodiment of the electrical connection of electronic device is detailed in Figure 23, and I will not elaborate.

Preferably, referring to Figure 24, the electrification alarm module 202 includes capacitor C2, high pressure diac D1, resistance R1, resistance R2 and light emitting diode D3.One embodiment of the electrical connection of each electronic component or electronic device is detailed in Figure 24, I will not elaborate.

Preferably, referring to Figure 25, the dual power supply switching module 203 includes capacitor C3, capacitor C4, dual power supply switching chip U1, storage capacitor EC1 and capacitor C1.One embodiment of the electrical connection of each electronic component or electronic device is detailed in figure 25, I will not elaborate.

Preferably, referring to Figure 26, the battery back-up module 204 includes power supply B1, switch K1 and storage capacitor EC3.Institute The embodiment for stating the electrical connection of each electronic component or electronic device is detailed in Figure 26, and I will not elaborate.

Preferably, described that piezoelectric voltage acquisition module 205 is taken to include resistance R14, resistance R15 and capacitor C16 referring to Figure 27.

Preferably, referring to Figure 28, the live detection module 206 includes resistance R17.

Preferably, referring to Figure 29, the external reference power module 207 includes capacitor C23, capacitor C24 and the voltage Reference chip U11.

Preferably, referring to Figure 30, the temperature-measuring module 208 includes that capacitor C14, capacitor C15 and temperature measure chip U7, resistance R12, resistance R10 and resistance R11.The model of the temperature measurement chip U7 is, for example, the simulation of Texas Instrument's production Temperature sensor LMT84.One embodiment of the electrical connection of each electronic component or electronic device is detailed in Figure 30, here No longer it is described in detail.

Preferably, referring to Figure 31, the distance-measurement module 209 includes capacitor C17, capacitor C18 and range measurement chip U8.One embodiment of the electrical connection of each electronic component or electronic device is detailed in Figure 31, and I will not elaborate.

Preferably, referring to Figure 32, the current measurement module 210 includes capacitor C21, capacitor C22, capacitor C20, resistance R18, resistance R19 and current measurement chip U9.The current measurement chip U9 is, for example, the sale of Beijing wafer Electronics Co., Ltd. Multidimensional MDT linear magnetic sensor TMR2505.One embodiment of the electrical connection of each electronic component or electronic device It is detailed in Figure 32, I will not elaborate.

Preferably, referring to Figure 33, the radio receiving transmitting module 211 includes capacitor C6, capacitor C7, capacitor C9, capacitor C9, electricity Hold C11, capacitor C12, capacitor C13, resistance R3, inductance L1, zener diode T2, antenna A1, radio frequency chip U2, balance- Imbalance converter U4 and oscillator U6, wherein the balanced-to-unblanced transformer U4 is by the imbalance in the antenna A1 Transmission line is converted into balanced load.One embodiment of the electrical connection of each electronic component or electronic device is detailed in figure 33, I will not elaborate.

Preferably, referring to Figure 34, the main control unit 212 includes capacitor C19, resistance R13, resistance R16, light emitting diode D8, main control chip U10 and debugging interface P1.The main control chip U10 is, for example, 16 ultralow function of Texas Instruments' production Consume microprocessor MSP430AFE253.One embodiment of the electrical connection of each electronic component or electronic device is detailed in figure 34, I will not elaborate.

Preferably, 3-15 referring to Fig.1, the first circuit board 21 and the second circuit board 22 are by internal threaded column and outer spiral shell Rasp bar is mechanically coupled together side by side, and is electrically connected by contact pin welding.Such design is so that electric connection mode is simple It is single.

Preferably, the passive compound sensor 120 is installed on the static contact of the high-tension switch cabinet.Such peace Dress mode stablizes 120 working environment of passive compound sensor.

The preferred or specific embodiment of the invention is described in detail above.It should be appreciated that the technology of this field Personnel make many modifications and variations without the design concept that creative work can be created according to the present invention.Therefore, all In technical field technical staff according to the design concept of the invention pass through on the basis of existing technology logic analysis, reasoning or The limited available technical solution of experiment of person, all should be within the scope of the invention and/or by claims institute In determining protection scope.

Claims (10)

1. passive compound sensor (120), including toroidal shell (100), PCB circuit board (2) and cohesion device (260), wherein The PCB circuit board (2) and the cohesion device (260) are arranged on the toroidal cavity (103) of the toroidal shell (100) Interior, the circumferential inner ring surface (101) of the toroidal shell (100) surrounds measurement space (104), the passive compound sensor (120) it is fixed on tested contact (300) by means of the cohesion device (260), the tested contact (300) passes through described It measures space (104), it is characterised in that:

The PCB circuit board (2) is made of two pieces of circuit boards: first circuit board (21) and second circuit board (22)；

The PCB circuit board (2) includes electric field electricity-fetching module (200), main control unit (212), temperature-measuring module (208) and electricity Flow measurement module (210)；The temperature-measuring module (208) and the current measurement module (210) with the main control unit (212) it connects；The electric field electricity-fetching module (200) is for obtaining induced voltage；The temperature-measuring module (208) is for detecting The temperature value of the tested contact (300)；The current measurement module (210) is controlled by the IO of the main control unit (212) and is supplied Thus electricity, and access differential ADC collection voltages calculate the load current of the tested contact (300).

2. passive compound sensor (120) described in accordance with the claim 1, it is characterised in that: the PCB circuit board (2) is also wrapped Include electrification alarm module (202)；The electrification alarm module (202) connect with the electric field electricity-fetching module (200)；The electric field The induced voltage that electricity-fetching module (200) obtains is output to the electrification alarm module (202)；The electrification alarm module (202) for carrying out the instruction that shines when the induced voltage is higher than preset value.

3. passive compound sensor (120) according to claim 2, it is characterised in that: the PCB circuit board (2) is also wrapped Include power management module (201), dual power supply switching module (203) and battery back-up module (204), wherein the reserve battery Module (204) includes storage capacitor EC3, and the storage capacitor EC3 and battery B1 is connected in parallel, and improves the electric discharge energy of battery VIN1 in power, output voltage Vbat and the power management module (201) circuit is respectively connected to the dual power supply switching module (203) the 2 tunnels input in；

The first foot EN of dual power supply switching chip U1 selects IN1 by low and high level in the dual power supply switching module (203) Or IN2 output, the IN1 of high level output, low level IN2 output；

The low and high level of the first foot EN compares from the voltage of the thresholding management circuit of the power management module (201) The 4th foot of device U3 exports, and high level can be exported after output voltage by reaching, and late-class circuit is just powered by electricity that electric field is got, Otherwise it is battery powered.

4. passive compound sensor (120) described in accordance with the claim 3, it is characterised in that: the PCB circuit board (2) is also wrapped It includes and takes piezoelectric voltage acquisition module (205) and radio receiving transmitting module (211), wherein is described to take piezoelectric voltage acquisition module (205) by institute It states after the voltage that power management module (201) is got passes through partial pressure and accesses the main control unit (212), the main control unit (212) this voltage can be acquired and reception device is sent to by the radio receiving transmitting module (211).

5. passive compound sensor (120) according to claim 4, it is characterised in that: the PCB circuit board (2) is also wrapped Include live detection module (206), wherein the thresholding is managed voltage comparator in circuit by the live detection module (206) It is accessed the main control unit (212) after output one resistance of series connection of U3, the IO foot of the main control unit (212) is set as interrupting Mode, high level triggering when charged can judge whether charge, and electriferous state is passed through the radio receiving transmitting module (211) it is sent to reception device, may know that whether the tested contact (300) is charged by backstage.

6. passive compound sensor (120) according to claim 5, it is characterised in that: the PCB circuit board (2) is also wrapped Include external reference power module (207), wherein reference electricity of the external reference power module (207) as simulation ADC acquisition Pressure, and the input pin of Voltage Reference chip U11 is controlled by the IO of the main control unit (212), when needing to carry out ADC acquisition Just it is powered.

7. passive compound sensor (120) according to claim 6, it is characterised in that:

The temperature-measuring module (208) includes contact temperature-measuring sensor；

Be disposed with thermal conductivity copper piece (3) on third contact zone (303) position, the thermal conductivity copper piece (3) thus with institute Tested contact (300) is stated directly to contact；

The thermal conductivity copper piece (3) is connected on the first circuit board (21), the contact of the temperature-measuring module (208) Formula temperature transducer is directly contacted with the thermal conductivity copper piece (3), and the temperature-measuring module (208) thus directly contacts institute It states tested contact (300), perceives the temperature of the tested contact (300).

8. passive compound sensor (120) according to claim 7, it is characterised in that: the electric field electricity-fetching module (200) Including rectifier bridge D2, rectifier bridge D6 and voltage-stabiliser tube D7, wherein the voltage-stabiliser tube D7 is in parallel with storage capacitor EC2.

9. passive compound sensor (120) according to claim 8, it is characterised in that: the electric field electricity-fetching module (200) It further include taking electrode (1), the taking electrode (1) is disposed in the toroidal cavity (103) of the toroidal shell (100) It is interior, and the circumferentially extending along the toroidal cavity (103), the length of the taking electrode (1) are greater than the toroidal shell (100) Perimeter half；

The connecting pin HV of the rectifier bridge D6 directly contacts the thermal conductivity copper piece (3), the connecting pin HG of the rectifier bridge D2 It is connected to the taking electrode (1), the connecting pin HG and the connecting pin HV form induced voltage.

10. passive compound sensor (120) according to claim 9, it is characterised in that: the electric field electricity-fetching module (200), the power management module (201) and the electrification alarm module (202) are disposed in the first circuit board (21) On；The dual power supply switching module (203), described takes piezoelectric voltage acquisition module (205), institute at the battery back-up module (204) State live detection module (206), the external reference power module (207), the temperature-measuring module (208), range measurement Module (209), the current measurement module (210), the radio receiving transmitting module (211) and the main control unit (212) are by cloth It sets on the second circuit board (22).