CN207650303U - A kind of novel probe position detecting device - Google Patents

Abstract

The utility model is related to a kind of novel probe position detecting devices, including arm type probe and detection circuit, detection circuit includes the microcontroller and capacitance sensor at least having two-way ADC, two-way ADC is separately connected the two poles of the earth of capacitance sensor, probe is located at below capacitance sensor, and abut capacitance sensor lower end, when probe is by upward thrust, a part for probe enters between the two poles of the earth of capacitance sensor, the capacitance of capacitance sensor is set to change, microcontroller measures the voltage at capacitance sensor the two poles of the earth by two-way ADC respectively, and the capacitance variation of capacitance sensor is calculated to judge probe location with this.The detection device may be used in the curved detection of all arm type probes, it realizes and is easy, probe location is easy detection judgement, since resistance value, voltage value or the current value size of probe need not be measured, so even if the detection circuit of some integrated circuits connection itself carries power supply, power supply short circuit will not be caused, measurement can be smoothly completed.

Description

A kind of novel probe position detecting device

Technical field

The utility model is related to detection technique field more particularly to a kind of novel probe position detecting devices.

Background technology

In integrated circuit and sensor production process, the test for carrying out various electric properties, detecting probe is needed to be Probe one end of a kind of common auxiliary tool, metal material is withstood in integrated circuit or sensor pads, one end connecting detection Circuit, so that it may to detect and collect the property indices of integrated circuit and sensor.Due to the characteristic of integrated circuit itself, wait for It is small to test contact area, narrow space, and probe itself is more elongated, there is no good method test probe whether with it is to be tested Contact, whether probe itself is good with contact to be tested, will have a direct impact on product parameters index, or even influence product Processing.

The prior art mainly has two kinds of methods to confirm contact situation, first, artificial ocular estimate is used, since there are visions Error and visual fatigue, in addition the position of general probe is than narrow, it is not easy to observe, be easy to cause range estimation error；Second is that adopting With contact measuring method, resistance value, voltage value or the current value size of detection probe, if be not in contact with, resistance value, voltage Value or current value have corresponding instruction, and still, the detection circuit of some integrated circuits connection itself carries power supply, is such as connect It touches and measures, be easy to cause power supply short circuit, to complete to measure.

Utility model content

The purpose of this utility model is to provide a kind of simple and direct novel probe position detections easy to implement, easy to detect Device.

Technical solution provided by the utility model is：A kind of novel probe position detecting device, including arm type probe and Detection circuit, the detection circuit include that at least microcontroller and capacitance sensor with two-way ADC, the two-way ADC distinguishes The two poles of the earth of capacitance sensor are connected, the probe is located at the lower section of capacitance sensor, and against the lower end of capacitance sensor, works as spy When needle is by upward thrust, a part for probe enters between the two poles of the earth of capacitance sensor, makes the capacitance of capacitance sensor It changes, the microcontroller measures the voltage at capacitance sensor the two poles of the earth by two-way ADC respectively, and calculates capacitance sensing with this The capacitance variation of device judges probe location.

Wherein, the two poles of the earth of the capacitance sensor are made of the two panels foil with isolation.

Wherein, the probe include the first arm and the second arm, the angle between first arm and the second arm be right angle or Obtuse angle.

Wherein, the detection device includes fixed frame, and the probe and capacitance sensor are arranged on fixed frame.

Wherein, the detection circuit includes indicator light, the indicator light and monolithic mechatronics.

Wherein, the indicator light is red and green color LED light.

Wherein, the detection circuit includes buzzer, the buzzer and monolithic mechatronics.

Wherein, the detection circuit includes display screen, the display screen and monolithic mechatronics.

Wherein, the detection circuit further includes crystal oscillating circuit, power supply circuit, the reference voltage with the monolithic mechatronics Circuit.

Wherein, the microcontroller model STM32F103, the ADC are 12.

The beneficial effects of the utility model are：The novel probe position detecting device includes arm type probe and detection electricity Road, detection circuit include microcontroller and capacitance sensor, and capacitance sensor is located above probe, when probe touches when detecting When product to be measured, progressed between the two poles of the earth of capacitance sensor by a part for upward thrust, probe deformations, probe, The capacitance of capacitance sensor is set gradually to change, the two-way ADC of microcontroller is passed for measuring capacitance respectively in detection circuit Then the voltage at sensor the two poles of the earth is changed by the voltage difference at the two poles of the earth to calculate the variation of capacitance value, when variation reaches It when to certain standard value, is considered as probe and has been contacted with product to be measured, which may be used on all arm types and visit It in the curved detection of needle, realizes and is easy, probe location is easy detection judgement, due to that need not measure resistance value, the voltage value of probe Or current value size will not cause power supply short so even if the detection circuit of some integrated circuits connection itself carries power supply Road can smoothly complete measurement.

Description of the drawings

Fig. 1 is the structural schematic diagram of novel probe position detecting device embodiment described in the utility model；

Fig. 2 is the overlooking structure diagram of novel probe position detecting device embodiment described in the utility model；

Fig. 3 is the functional block diagram of detection circuit in novel probe position detecting device embodiment described in the utility model；

Fig. 4 is the overhaul flow chart of novel probe position detecting device embodiment described in the utility model.

Wherein, 1, probe；11, the first arm；12, the second arm；2, capacitance sensor；3, fixed frame；4, product to be measured.

Specific implementation mode

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

As the embodiment of novel probe position detecting device described in the utility model, as shown in Figures 1 to 4, including hand Arm type probe 1 and detection circuit, the detection circuit includes the microcontroller and capacitance sensor 2 at least having two-way ADC, described Two-way ADC is separately connected the two poles of the earth of capacitance sensor 2, and the probe 1 is located at the lower section of capacitance sensor 2, and is passed against capacitance The lower end of sensor 2, when probe 1 is by upward thrust, a part for probe 1 enters between the two poles of the earth of capacitance sensor 2, makes The capacitance of capacitance sensor 2 changes, and the microcontroller measures the electricity at 2 the two poles of the earth of capacitance sensor by two-way ADC respectively Pressure, and the capacitance variation of capacitance sensor 2 is calculated to judge 1 position of probe with this.

In embodiment, the probe 1 includes the first arm 11 and the second arm 12, between first arm, 11 and second arm 12 Angle be right angle or obtuse angle, after probe 1 deforms, the part that the second arm 12 enters between capacitance sensor 2 is more, is easy to influence The capacitance of capacitance sensor 2.

In embodiment, the detection device includes fixed frame 3, and the probe 1 and capacitance sensor 2 are arranged in fixed frame On 3.

In embodiment, the two poles of the earth of the capacitance sensor 2 are made of the two panels foil with isolation, can be copper foils Paper or other metal materials, band isolation would not influence the original signal of probe 1 because contact is conductive.

In embodiment, the detection circuit includes indicator light, the indicator light and monolithic mechatronics, specifically, institute It is that red and green color LED light is displayed in red when judging probe not yet contact measured product to state indicator light, when judging probe When contact measured product, display green.The detection circuit includes buzzer, the buzzer and monolithic mechatronics, when sentencing Disconnected probe contact measured product when, buzzer warning, to prompt commissioning staff or operating personnel.Indicator light and buzzer master In place whether act on exactly can judge probe when the machine of tune by sound or light range estimation.

In embodiment, the detection circuit includes display screen, the display screen and monolithic mechatronics, each for showing Kind detection information.

In embodiment, the detection circuit further includes crystal oscillating circuit, power supply circuit, the base with the monolithic mechatronics Quasi- potential circuit, to ensure the normal operation of SCM system.

In embodiment, the microcontroller model STM32F103 is a 32 microcontrollers, including multichannel 12 ADC.12 ADC precision are 4096 grades, can detect subtle voltage change, and AD conversion precision is high, due to and without using specially ADC chips, it is of low cost.

The principle of detection is：Under normal circumstances, capacitance value（Capacity）For C=ε S/d, wherein C is electricity Hold capacity, ε is dielectric conductance rate, and S is the cross-sectional area of sheet metal, and d is the distance between the two poles of the earth.When probe deforms upon When, probe portion progresses into inside the capacitance sensor of foil composition, and the ε of capacitance sensor changes, and is set as ε ', so when capacitance be C '=ε ' S/d.The two poles of the earth voltage difference of capacitance sensor can change when capacitance variation, this meeting It is measured by the two-way ADC on microcontroller, when voltage difference variation in the two poles of the earth reaches a certain level, then it is assumed that probe is provided with enough Deformation, i.e., probe has touched product to be measured.

The flow of detection is：SCM system initializes first, and ADC and display screen initialization start to detect, monolithic is machine-readable It takes AD values and calculates the two poles of the earth voltage difference variation；Whether it is more than the standard value of setting according to the variation of the two poles of the earth voltage difference；If it is less than setting Fixed standard value then judges that probe not yet in place, continues to move to probe, and indicator light is displayed in red；If it is greater than the standard of setting Value, then judge probe in place, indicator light display green.

The novel probe position detecting device includes arm type probe and detection circuit, detection circuit include microcontroller and Capacitance sensor, capacitance sensor are located above probe, when probe touches product to be measured when detecting, are pushed away by upward A part for power, probe deformations, probe progresses between the two poles of the earth of capacitance sensor, keeps the capacitance of capacitance sensor gradual It changes, voltages of the two-way ADC of microcontroller for measuring capacitance sensor the two poles of the earth respectively, then passes through two in detection circuit The voltage difference of pole changes to calculate the variation of capacitance value, when variation reaches certain standard value, is considered as visiting Needle has been contacted with product to be measured, which may be used in the curved detection of all arm type probes, is realized and is easy, and is visited Pin position is easy detection judgement, due to that need not measure resistance value, voltage value or the current value size of probe, so even if some collect The detection circuit itself connected at circuit carries power supply, will not cause power supply short circuit, can smoothly complete measurement.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model Protection domain within.

Claims (10)

1. a kind of novel probe position detecting device, which is characterized in that including arm type probe and detection circuit, the detection electricity Road includes that at least microcontroller and capacitance sensor with two-way ADC, the two-way ADC is separately connected the two of capacitance sensor Pole, the probe are located at the lower section of capacitance sensor, and against the lower end of capacitance sensor, when probe is by upward thrust When, a part for probe enters between the two poles of the earth of capacitance sensor, and the capacitance of capacitance sensor is made to change, the monolithic Machine measures the voltage at capacitance sensor the two poles of the earth by two-way ADC respectively, and with this capacitance variation for calculating capacitance sensor Judge probe location.

2. novel probe position detecting device according to claim 1, which is characterized in that the two poles of the earth of the capacitance sensor It is made of the two panels foil with isolation.

3. novel probe position detecting device according to claim 1, which is characterized in that the probe include the first arm and Second arm, the angle between first arm and the second arm are right angle or obtuse angle.

4. novel probe position detecting device according to claim 1, which is characterized in that the detection device includes fixing Frame, the probe and capacitance sensor are arranged on fixed frame.

5. novel probe position detecting device according to claim 1, which is characterized in that the detection circuit includes instruction Lamp, the indicator light and monolithic mechatronics.

6. novel probe position detecting device according to claim 5, which is characterized in that the indicator light is red and green color LED light.

7. novel probe position detecting device according to claim 1, which is characterized in that the detection circuit includes buzzing Device, the buzzer and monolithic mechatronics.

8. novel probe position detecting device according to claim 1, which is characterized in that the detection circuit includes display Screen, the display screen and monolithic mechatronics.

9. novel probe position detecting device according to claim 1, which is characterized in that the detection circuit further include with Crystal oscillating circuit, power supply circuit, the reference voltage circuit of the monolithic mechatronics.

10. novel probe position detecting device according to claim 1, which is characterized in that the microcontroller model STM32F103, the ADC are 12.