CN110031137A - A kind of spring touch finger is comprehensive to compress force checking device - Google Patents
A kind of spring touch finger is comprehensive to compress force checking device Download PDFInfo
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- CN110031137A CN110031137A CN201910199333.4A CN201910199333A CN110031137A CN 110031137 A CN110031137 A CN 110031137A CN 201910199333 A CN201910199333 A CN 201910199333A CN 110031137 A CN110031137 A CN 110031137A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/225—Measuring circuits therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of comprehensive compression force checking devices of spring touch finger, including detector, device housing, device handle, tablet computer, operational amplifying module, MCU microprocessor, display module, WIFI communication module, zero correction button module and power module, the detector is fixed on device housing left end, the display module is located at the positive top of device housing, and the zero correction button module is located on the positive side of device housing；It is fixedly connected on the right side of described device handle and device housing, described device handle and device housing junction are equipped with power switch.The present invention on detector by setting multiple groups sensor, measurement obtains multiple groups pressure signal value, by the pressing force that mean value is calculated, it is convenient that the state of entire fingertip is judged, it can be avoided drift, temperature drift influences, measured value, which can show on the display module and is sent on tablet computer by WIFI, simultaneously is further analyzed processing, convenient for formulating accurate Strategies of Maintenance.
Description
Technical field
The present invention relates to power industry detection device, specifically a kind of spring touch finger is comprehensive to compress force checking device.
Background technique
Electric power fingertip is the widest high-tension apparatus conductive contact element of usage amount maximum application in electric system, and spring
Fingertip is the critical component on power equipment, is worked since the spring on fingertip is chronically exposed under atmospheric environment, by rain
The erosion of water, dust and pernicious gas easily causes elastic force to decline or fail, and the size of spring touch finger pressure will affect contact
Contact resistance value size and contact temperature height, contact temperature can influence in turn and provide the spring of pressure for fingertip
Can, and the quality of spring performance not only has direct connection to the service life of high voltage isolator, also affects the defeated change of high pressure
The operational safety of power grid, therefore, it is very necessary for carrying out detection to sensing finger pressure；It is main to spring touch finger pressure measurement at present
It is the experience by service personnel, draws the size for holding estimation contact pressure manually, this method was not only inconvenient but also inaccurate；Also
One is analog isolation switch movable contact devices to be mounted on sensing element on analog isolation switch movable contact, is inserted into spring touch finger
It is interior that pressure is measured；But since sensing element or use environment variation, the null offset being easy to produce, measured value be not smart
Really, Measurement channel is also limited, can not detect each fingertip pressing force and average pressing force, judge the state of entire fingertip,
And data are uploaded to tablet computer and are analyzed and processed, formulate accurate Strategies of Maintenance.
Therefore, a kind of comprehensive compression force checking device of spring touch finger is needed, can be realized multiple channels to fingertip pressing force
Precise measurement is carried out, comprehensive mean pressing force is calculated, judges the state of entire fingertip, and measurement data can be uploaded to flat
Plate computer is analyzed and processed.
Summary of the invention
It can be realized multiple channels in view of the deficiencies of the prior art, the present invention proposes one kind to examine fingertip pressing force
It surveys, measured value is accurate, and measurement data can be uploaded to the comprehensive pressing force of spring touch finger that tablet computer is analyzed and processed
Detection device.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of spring touch finger is comprehensive to compress force checking device, including detector, device housing, device handle, tablet computer, operation
Amplification module, MCU microprocessor, display module, WIFI communication module, zero correction button module and power module composition；Institute
It states detector and is fixed on device housing left end, the display module is located at the positive top of device housing, the zero correction button mould
Block is located on the positive side of device housing；It is fixedly connected on the right side of described device handle and device housing, described device handle and device
Housing junction is equipped with power switch；The operational amplifying module, MCU microprocessor and WIFI communication module are installed in dress
It sets in shell, the power module is mounted in device handle；The detector is equipped with sensor, the sensor and operation
Amplification module is connected, and A/D converter and dual serial interface, the operational amplifying module are integrated on the MCU microprocessor
It is connected with A/D converter, the display module is connected with one in MCU microprocessor dual serial interface, and the WIFI is logical
Letter module is connected with another in MCU microprocessor dual serial interface, and the WIFI communication module passes through WIFI wireless communication
Number it is connected with tablet computer, the zero correction button module is connected with MCU microprocessor；The sensor, operation amplifier mould
Block, MCU microprocessor, display module and WIFI communication module are connected by power switch with power module, the power module
It is connected with power supply adaptor.The detector can be inserted in spring touch finger, after the pressure signal of the sensor detection on detector,
It is transmitted to operational amplifying module and carries out preposition amplification, zeroing differential amplification；After A/D converter carries out analog-to-digital conversion to signal, MCU
Microprocessor carries out anti-impulse disturbances average algorithm program and carries out digital filtering, and the actual value after filtering conversion passes through two strings
It is shown on line interface transmission display module, and is sent on tablet computer by WIFI communication module, set in power module
There is lithium battery, power supply adaptor can charge for battery.
Further, the sensor is at most equipped with 8 groups, and the sensor is all made of film resistor strain-type pressure sensing
Device.The sensor can measure multi-group data, keep measurement result more accurate, using film resistor strain pressure transducer
Have many advantages, such as that the ess-strain linearity is good, reproducible, return difference is small, creep is small.
Further, the A/D converter uses 8 Channel 12-Bit A/D converters.8 Channel 12-Bit A/D converters carry out mould
Number conversion, resolution ratio can reach requirement, and power consumption is relatively low.
Further, the operational amplifying module includes amplifying circuit and zeroing circuit.Amplifying circuit has two-stage amplification, preceding
Big and differential amplification is put, is calibrated before differential amplification by zeroing, drift, temperature drift is avoided to influence accuracy.
Further, the amplifying circuit is mainly by CON4 interface J1, CLC1200 amplifier U1, CLC1200 amplifier U2, electricity
Hinder R1, resistance R2, resistance R3, resistance R9, resistance R17, resistance R18, resistance R21, resistance R12 and LM358 amplifier B, capacitor C6,
Capacitor C8, capacitor C15 and capacitor C16 composition；The CON4 interface J1 pin 3 is connected with the one end resistance R2, the resistance R2 other end
It is connected with one end of CLC1200 amplifier U1 pin 2, capacitor C8 and capacitor C15, CON4 interface J1 pin 2 and the one end resistance R3 phase
Even, the resistance R3 other end is connected with CLC1200 amplifier U1 pin 3, the other end of capacitor C15 and the one end capacitor C6, capacitor C8 with
The other end of capacitor C6 is connected and is grounded with CON4 interface J1 pin 1；The CLC1200 amplifier U1 pin 1 and the one end resistance R1
It is connected, the resistance R1 other end is connected with CLC1200 amplifier U1 pin 8, CLC1200 amplifier U1 pin 4 and 12V power cathode phase
Even, CLC1200 amplifier U1 pin 7 is connected with 12V positive pole, and CLC1200 amplifier U1 pin 5 is grounded, and CLC1200 amplifier U1 draws
Foot 8 is connected with the one end resistance R9, and the resistance R9 other end is connected with CLC1200 amplifier U2 pin 3, CLC1200 amplifier U2 pin 1 with
The one end resistance R18 is connected, and the resistance R18 other end is connected with the one end resistance R21, and the another both ends resistance R21 are drawn with CLC1200 amplifier U2
Foot 8 is connected, and CLC1200 amplifier U2 pin 4 is connected with 12V power cathode, CLC1200 amplifier U2 pin 7 and 12V positive pole phase
Even, CLC1200 amplifier U2 pin 6 is connected with the one end resistance R17, the resistance R17 other end and resistance R12 and the one end capacitor C16 phase
Even, the capacitor C16 other end is connected and is grounded with CLC1200 amplifier U2 pin 5, the resistance R12 other end and LM385 amplifier B pin 5
It is connected, LM358 amplifier B pin 6 is connected with pin 7, and the output of LM358 amplifier B pin 7 is connected to A/D converter.It is put by two-stage
Signal frequency reaches amplification factor demand after big, and following digital filter effect is preferable.
Further, the zeroing circuit mainly by CON4 interface J2, resistance R8, resistance R4, resistance R20, resistance R13,
Resistance R14, resistance R16, resistance R22 and LM358 amplifier A composition；The CON4 interface J2 pin 4 is connected with the one end resistance R8,
The resistance R8 other end is connected with resistance R4 and the one end resistance R20 respectively, and the resistance R4 other end and the one end resistance R13 and LM358 are transported
It puts A pin 2 to be connected, the resistance R20 other end is connected with the one end resistance R22, the resistance R13 other end and 1 phase of LM358 amplifier A pin
Even, LM358 amplifier A pin 1 is connected with the one end resistance R16, and the resistance R16 other end is connected with the resistance R22 other end, LM358 fortune
It puts A pin 3 to be connected with the one end resistance R4, resistance R4 other end ground connection, resistance R22 third end is connected to CLC1200 amplifier U2 and draws
On foot 3.It is returned to zero by zeroing circuit to differential amplifier circuit, input signal source is avoided to be interfered by bottom noise cancellation signal or directly
It is amplified device shielding, leads to loss of data, drift, temperature drift occurs.
The working principle of the invention:
When detection, spring touch finger is inserted on detector, is turned on the power switch, the multiple groups film resistor strain-type pressure on detector
After force snesor detects signal, transmits a signal to operational amplifying module and carry out preposition amplification and the amplification of differential amplification two-stage, it is poor
It is calibrated before dividing amplification by zeroing, drift, temperature drift is avoided to influence accuracy；12 A/ are transmitted to by the amplified signal of two-stage
D converter carries out analog-to-digital conversion to signal, and the digital signal after conversion enters MCU microprocessor calculation processing, and treated believes
Number value, which is transmitted on the display module set on the device housing by serial line interface, to be shown, while treated that signal value is logical
It crosses WIFI communication module and is sent on tablet computer and be analyzed and processed, convenient for formulating accurate Strategies of Maintenance.
Compared with prior art, the present invention have the utility model has the advantages that
1. the present invention obtains multiple groups pressing force signal value, passes through by setting multiple groups sensor on detector while being detected
The pressing force of comprehensive mean is calculated, measurement result is accurate, convenient to judge the state of entire fingertip.
2. the invention detects that pressure signal amplify by two-stage, carry out zeroing calibration before the differential amplification of the second level, keep away
Exempt from drift, temperature drift influence accuracy, amplified signal frequency multiple reaches demand, and following digital filter effect is preferable.
3. the invention detects that signal handled through MCU microprocessor, actual value that treated can be directly aobvious
Show and shown in module, and further progress analysis on tablet computer can be sent to by WIFI communication module and handled, is convenient for
Formulate accurate Strategies of Maintenance.
Detailed description of the invention
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is present system block diagram.
Fig. 3 is amplification circuit diagram of the present invention.
Appended drawing reference: 1- detector, 2- display module, 3- device housing, 4- device handle, 5- power switch, 6- zero point
Correcting button module, 7- sensor, 8- tablet computer.
Specific embodiment
The following further describes the present invention with reference to the drawings.
Embodiment 1:
A kind of spring touch finger is comprehensive to compress force checking device, including detector 1, device housing 3, device handle 4, tablet computer 8,
Operational amplifying module, MCU microprocessor, display module 2, WIFI communication module, zero correction button module 6 and power module group
At；The detector 1 is fixed on 3 left end of device housing, and the display module 2 is located at the positive top of device housing 3, the zero point school
Positive button module 6 is located on the positive side of device housing 3；It is fixedly connected on the right side of described device handle 4 and device housing 3, the dress
It sets handle 4 and 3 junction of device housing is equipped with power switch 5；The operational amplifying module, MCU microprocessor and WIFI communication
Module is installed in device housing 3, and the power module is mounted in device handle 4；The detector 1 is equipped with sensor
7, the sensor 7 is connected with operational amplifying module, is integrated with A/D converter on the MCU microprocessor and dual serial connects
Mouthful, the operational amplifying module is connected with A/D converter, in the display module 2 and MCU microprocessor dual serial interface
One is connected, and the WIFI communication module is connected with another in MCU microprocessor dual serial interface, the WIFI communication
Module is connected by WIFI wireless signal with tablet computer 8, and the zero correction button module 6 is connected with MCU microprocessor；Institute
It states sensor 7, operational amplifying module, MCU microprocessor, display module 2 and WIFI communication module and passes through power switch 5 and power supply
Module is connected, and the power module is connected with power supply adaptor.
The sensor 7 is equipped with eight groups, and the sensor 7 is all made of film resistor strain pressure transducer.
The A/D converter uses 8 Channel 12-Bit A/D converters.
The operational amplifying module includes amplifying circuit and zeroing circuit.
The amplifying circuit is mainly by CON4 interface J1, CLC1200 amplifier U1, CLC1200 amplifier U2, resistance R1, resistance
R2, resistance R3, resistance R9, resistance R17, resistance R18, resistance R21, resistance R12 and LM358 amplifier B, capacitor C6, capacitor C8, electricity
Hold C15 and capacitor C16 composition；The CON4 interface J1 pin 3 is connected with the one end resistance R2, the resistance R2 other end and CLC1200
Amplifier U1 pin 2, capacitor C8 are connected with one end of capacitor C15, and CON4 interface J1 pin 2 is connected with the one end resistance R3, resistance R3
The other end is connected with CLC1200 amplifier U1 pin 3, the other end of capacitor C15 and the one end capacitor C6, and capacitor C8 and capacitor C6's is another
One end is connected and is grounded with CON4 interface J1 pin 1；The CLC1200 amplifier U1 pin 1 is connected with the one end resistance R1, resistance R1
The other end is connected with CLC1200 amplifier U1 pin 8, and CLC1200 amplifier U1 pin 4 is connected with 12V power cathode, CLC1200 fortune
It puts U1 pin 7 to be connected with 12V positive pole, CLC1200 amplifier U1 pin 5 is grounded, CLC1200 amplifier U1 pin 8 and resistance R9
One end is connected, and the resistance R9 other end is connected with CLC1200 amplifier U2 pin 3, CLC1200 amplifier U2 pin 1 and the one end resistance R18
It is connected, the resistance R18 other end is connected with the one end resistance R21, and the another both ends resistance R21 are connected with CLC1200 amplifier U2 pin 8,
CLC1200 amplifier U2 pin 4 is connected with 12V power cathode, and CLC1200 amplifier U2 pin 7 is connected with 12V positive pole,
CLC1200 amplifier U2 pin 6 is connected with the one end resistance R17, and the resistance R17 other end is connected with resistance R12 and the one end capacitor C16,
The capacitor C16 other end is connected and is grounded with CLC1200 amplifier U2 pin 5, the resistance R12 other end and 5 phase of LM385 amplifier B pin
Even, LM358 amplifier B pin 6 is connected with pin 7, and the output of LM358 amplifier B pin 7 is connected to A/D converter.
The zeroing circuit is mainly by CON4 interface J2, resistance R8, resistance R4, resistance R20, resistance R13, resistance R14, electricity
Hinder R16, resistance R22 and LM358 amplifier A composition；The CON4 interface J2 pin 4 is connected with the one end resistance R8, and resistance R8 is another
End is connected with resistance R4 and the one end resistance R20 respectively, the resistance R4 other end and 2 phase of the one end resistance R13 and LM358 amplifier A pin
Even, the resistance R20 other end is connected with the one end resistance R22, and the resistance R13 other end is connected with LM358 amplifier A pin 1, LM358 fortune
A pin 1 is put to be connected with the one end resistance R16, the resistance R16 other end is connected with the resistance R22 other end, LM358 amplifier A pin 3 with
The one end resistance R4 is connected, and resistance R4 other end ground connection, resistance R22 third end is connected on CLC1200 amplifier U2 pin 3.
The usage mode of the embodiment:
When detection, 5 and tablet computer 8 are turned on the power switch, zero correction button module 6 is pressed and returns to zero, spring touch finger
It is inserted on detector 1, after the multiple groups film resistor strain pressure transducer on detector 1 detects signal, transmits a signal to
Operational amplifying module carries out preposition amplification and the amplification of differential amplification two-stage, and zeroing calibration is passed through before differential amplification, avoids drift, temperature
Drift influences accuracy；12 A/D converters are transmitted to by the amplified signal of two-stage, analog-to-digital conversion is carried out to signal, after conversion
Digital signal enter MCU microprocessor calculation processing, treated, and signal value is transmitted to by serial line interface is located at device shell
It is shown on display module 2 on body 3, while treated signal value is sent to tablet computer 8 by WIFI communication module
On be analyzed and processed, convenient for formulating accurate Strategies of Maintenance.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (6)
1. a kind of spring touch finger is comprehensive to compress force checking device, including it is detector (1), device housing (3), device handle (4), flat
Plate computer (8), operational amplifying module, MCU microprocessor, display module (2), WIFI communication module, zero correction button module
(6) and power module forms；
It is characterized by: the detector (1) is fixed on device housing (3) left end, the display module (2) is located at device housing
(3) positive top, the zero correction button module (6) are located on the positive side of device housing (3)；Described device handle (4) and dress
It sets and is fixedly connected on the right side of shell (3), described device handle (4) and device housing (3) junction are equipped with power switch (5)；
The operational amplifying module, MCU microprocessor and WIFI communication module are installed in device housing (3), the power supply
Module is mounted in device handle (4)；
The detector (1) is equipped with sensor (7), and the sensor (7) is connected with operational amplifying module, the micro- place MCU
It is integrated with A/D converter and dual serial interface on reason device, the operational amplifying module is connected with A/D converter, the display
Module (2) is connected with one in MCU microprocessor dual serial interface, the WIFI communication module and MCU microprocessor two
Another in a serial line interface is connected, and the WIFI communication module is connected by WIFI wireless signal with tablet computer (8), institute
Zero correction button module (6) is stated to be connected with MCU microprocessor；
The sensor (7), operational amplifying module, MCU microprocessor, display module (2) and WIFI communication module pass through power supply
Switch (5) is connected with power module, and the power module is connected with power supply adaptor.
2. a kind of spring touch finger according to claim 1 is comprehensive to compress force checking device, it is characterised in that: the sensor
(7) eight groups are equipped with, the sensor (7) is all made of film resistor strain pressure transducer.
3. a kind of spring touch finger according to claim 1 is comprehensive to compress force checking device, it is characterised in that: the A/D turns
Parallel operation uses 8 Channel 12-Bit A/D converters.
4. a kind of spring touch finger according to claim 1 is comprehensive to compress force checking device, it is characterised in that: the operation is put
Big module includes amplifying circuit and zeroing circuit.
5. a kind of spring touch finger according to claim 4 is comprehensive to compress force checking device, it is characterised in that: the amplification electricity
Road is mainly by CON4 interface J1, CLC1200 amplifier U1, CLC1200 amplifier U2, resistance R1, resistance R2, resistance R3, resistance R9, electricity
Hinder R17, resistance R18, resistance R21, resistance R12 and LM358 amplifier B, capacitor C6, capacitor C8, capacitor C15 and capacitor C16 composition；
The CON4 interface J1 pin 3 is connected with the one end resistance R2, the resistance R2 other end and CLC1200 amplifier U1 pin 2, capacitor
C8 is connected with one end of capacitor C15, and CON4 interface J1 pin 2 is connected with the one end resistance R3, and the resistance R3 other end and CLC1200 are transported
Put U1 pin 3, the other end of capacitor C15 is connected with the one end capacitor C6, the other end and CON4 interface J1 of capacitor C8 and capacitor C6
Pin 1 is connected and is grounded；The CLC1200 amplifier U1 pin 1 is connected with the one end resistance R1, the resistance R1 other end and CLC1200
Amplifier U1 pin 8 is connected, and CLC1200 amplifier U1 pin 4 is connected with 12V power cathode, CLC1200 amplifier U1 pin 7 and 12V electricity
Source anode is connected, and CLC1200 amplifier U1 pin 5 is grounded, and CLC1200 amplifier U1 pin 8 is connected with the one end resistance R9, and resistance R9 is another
One end is connected with CLC1200 amplifier U2 pin 3, and CLC1200 amplifier U2 pin 1 is connected with the one end resistance R18, and resistance R18 is another
End is connected with the one end resistance R21, and the another both ends resistance R21 are connected with CLC1200 amplifier U2 pin 8, CLC1200 amplifier U2 pin 4
It is connected with 12V power cathode, CLC1200 amplifier U2 pin 7 is connected with 12V positive pole, CLC1200 amplifier U2 pin 6 and electricity
It hinders the one end R17 to be connected, the resistance R17 other end is connected with resistance R12 and the one end capacitor C16, the capacitor C16 other end and CLC1200
Amplifier U2 pin 5 be connected and be grounded, the resistance R12 other end is connected with LM385 amplifier B pin 5, LM358 amplifier B pin 6 with draw
Foot 7 is connected, and the output of LM358 amplifier B pin 7 is connected to A/D converter.
6. a kind of spring touch finger according to claim 4 is comprehensive to compress force checking device, it is characterised in that: the zeroing electricity
Road mainly by CON4 interface J2, resistance R8, resistance R4, resistance R20, resistance R13, resistance R14, resistance R16, resistance R22 and
LM358 amplifier A composition；
The CON4 interface J2 pin 4 is connected with the one end resistance R8, the resistance R8 other end respectively with resistance R4 and the one end resistance R20
It is connected, the resistance R4 other end is connected with the one end resistance R13 and LM358 amplifier A pin 2, the resistance R20 other end and resistance R22 mono-
End is connected, and the resistance R13 other end is connected with LM358 amplifier A pin 1, and LM358 amplifier A pin 1 is connected with the one end resistance R16, electricity
The resistance R16 other end is connected with the resistance R22 other end, and LM358 amplifier A pin 3 is connected with the one end resistance R4, another termination of resistance R4
Ground, resistance R22 third end are connected on CLC1200 amplifier U2 pin 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910199333.4A CN110031137A (en) | 2019-03-15 | 2019-03-15 | A kind of spring touch finger is comprehensive to compress force checking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910199333.4A CN110031137A (en) | 2019-03-15 | 2019-03-15 | A kind of spring touch finger is comprehensive to compress force checking device |
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| CN110031137A true CN110031137A (en) | 2019-07-19 |
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|---|---|---|---|
| CN201910199333.4A Pending CN110031137A (en) | 2019-03-15 | 2019-03-15 | A kind of spring touch finger is comprehensive to compress force checking device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567618A (en) * | 2019-07-29 | 2019-12-13 | 深圳供电局有限公司 | Contact engagement force detection device and platform |
| CN111024287A (en) * | 2019-12-11 | 2020-04-17 | 广西电网有限责任公司桂林供电局 | Isolator touches and indicates comprehensive clamp force testing arrangement |
| CN113503994A (en) * | 2021-07-31 | 2021-10-15 | 国网河南省电力公司南阳供电公司 | Switch cabinet contact finger pressure detection device |
| CN113804341A (en) * | 2021-09-16 | 2021-12-17 | 贵州电网有限责任公司 | Adjustable pressure detection device for contact of isolating switch |
| CN115474902A (en) * | 2022-09-30 | 2022-12-16 | 山东大学 | Human body pressure threshold detection device and detection method |
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| CN113503994A (en) * | 2021-07-31 | 2021-10-15 | 国网河南省电力公司南阳供电公司 | Switch cabinet contact finger pressure detection device |
| CN113804341A (en) * | 2021-09-16 | 2021-12-17 | 贵州电网有限责任公司 | Adjustable pressure detection device for contact of isolating switch |
| CN113804341B (en) * | 2021-09-16 | 2024-04-12 | 贵州电网有限责任公司 | Adjustable isolating switch contact pressure detection device |
| CN115474902A (en) * | 2022-09-30 | 2022-12-16 | 山东大学 | Human body pressure threshold detection device and detection method |
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