CN206930265U - A kind of high reliability grating scale process circuit - Google Patents
A kind of high reliability grating scale process circuit Download PDFInfo
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- CN206930265U CN206930265U CN201720807700.0U CN201720807700U CN206930265U CN 206930265 U CN206930265 U CN 206930265U CN 201720807700 U CN201720807700 U CN 201720807700U CN 206930265 U CN206930265 U CN 206930265U
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Abstract
It the utility model is related to a kind of high reliability grating scale process circuit, including grating sensor, the signal processing circuit module that is connected with grating sensor；Signal processing circuit module includes PMU, high integration signal processing unit IC MQF and the signal output isolated location being connected with high integration signal processing unit IC MQF output ends；High integration signal processing unit IC MQF include differential amplifier circuit, shaping circuit, pulse-scaling circuit and mirror to circuit, are connected with grating sensor to receive photosignal and determine the displacement and moving direction of displacement；Signal output isolated location includes the TVS Transient Suppression Diode array circuits that 6 tunnels are connected between power supply and ground, any road TVS Transient Suppression Diodes array circuit includes two TVS Transient Suppression Diodes forward connected, is connected between described two TVS Transient Suppression Diodes with high integration signal processing unit IC MQF output end.The technical program aims to solve the problem that the technical problem for inversely entering impact and damage of the flash of grating scale to grating scale in industrial environment.
Description
Technical field
Grating scale technical field is the utility model is related to, more particularly to a kind of high reliability grating scale process circuit.
Background technology
Grating scale is also referred to as grating rule displacement sensor (grating scale sensor), is by scale grating and grating reading head two
Part forms.Scale grating is generally fixed in lathe fixed component, and grating reading head indicates light in lathe moving part
Grid are mounted in grating reading head.The key component of Grating examinations device is grating reading head, and it is by light source, convergent lens, instruction
Grating, photoelectric cell and adjustment mechanism etc. form, and are the measurement feedback devices to be worked using the optical principle of grating.Grating scale passes through
It is commonly applied in the closed loop servo system of Digit Control Machine Tool, can be used as the detection of straight-line displacement or angular displacement.It measures output
Signal is often digit pulse, has detection range big, and accuracy of detection is high, the characteristics of fast response time.
Grating scale is generally operational in extremely severe industrial environment, the electrostatic strong jamming especially in industrial environment, its
High pressure can reach +/- tens of KV, and momentary pulse impact can reach very big, unshielded to cause system operation irregularity even
Chip is directly damaged, and grating scale is a kind of high precision measuring instrument, costly, of short duration service life can give enterprise to price
Increase production cost, design a kind of high reliability grating scale process circuit, there are very big market prospects.
Utility model content
The purpose of this utility model is to provide a kind of high reliability grating scale process circuit, to solve due to extraneous capable and experienced
The reverse technical problem for entering and impacting and damage to caused by grating scale after grating scale is disturbed, so that grating scale possesses high reliability.
The technical solution adopted in the utility model is as follows：
A kind of high reliability grating scale process circuit, including grating sensor, the signal that is connected with the grating sensor
Processing circuit module；The signal processing circuit module includes PMU, high integration signal processing unit IC-MQF
The signal output isolated location being connected with high integration signal processing unit IC-MQF output ends；High integration signal transacting list
First IC-MQF includes differential amplifier circuit, shaping circuit, pulse-scaling circuit and mirror to circuit, is connected with grating sensor to connect
Receive photosignal and determine the displacement and moving direction of displacement；IC-MQF be integrated with differential amplification, shaping, step-by-step counting and
Reflect to function, the circuit compared to original separation reduces the volume of whole grating scale, beneficial to PMU, signal output every
From the placement of unit, IC-MQF is also equipped with reverse polarity protection, adjustable constant current output, temperature detection, input/output signal in addition
The functions such as detection, automatic growth control, signal subdivision, make grating scale possess higher reliability.
The signal output isolated location includes the TVS Transient Suppression Diode arrays that 6 tunnels are connected between power supply and ground
Circuit, any road TVS Transient Suppression Diodes array circuit includes two TVS Transient Suppression Diodes forward connected, described
Output end between two TVS Transient Suppression Diodes with high integration signal processing unit IC-MQF is connected.Work as external system
High reject signal enter grating scale after first pass around TVS Transient Suppression Diode array circuits, TVS Transient Suppression Diodes
Array circuit at once will curb high reject signal, avoid enter into and wafer damage is caused inside grating scale.
In a kind of described high reliability grating scale process circuit, the grating sensor includes the mark for being installed on affixed side
Chi grating and the grating reading head for being installed on mobile side, the grating reading head is by light source, convergent lens, indication grating, photoelectricity
Element；The photoelectric cell is connected to obtain phase difference with high integration signal processing unit IC-MQF differential amplifier inputs
For 90 ° of the first signal, first signal is sent into shaping circuit to obtain dutycycle as 1：1 secondary signal, described second
Signal is respectively fed to pulse-scaling circuit and reflected to circuit to obtain the displacement of grating scale and direction.
In a kind of described high reliability grating scale process circuit, the PMU uses power management chip
MIC5205, the input IN of the power management chip MIC5205 are connected with external power source and meet filter capacitor C11It is defeated to ground
Go out to hold to be parallel with resitstance voltage divider and filter circuit C12 between OUT and earth terminal GND, the resitstance voltage divider includes partial pressure electricity
R11, R12 are hindered, adjustable voltage stabilizer feed back input is connected between resitstance voltage divider divider resistance R11, R12.In MIC5205 chips
Portion carries overvoltage protection, and anti-level protection, chip output current is big, and environment temperature adapts to wide, the features such as strong antijamming capability, leads to
The regulation for being designed to realize output voltage of outside bleeder circuit and filter circuit is crossed, and the constant of its output is made by regulation
Voltage matches with IC-MQF, and added with filter circuit can be good at suppressing the ripple of voltage in the input/output terminal of chip
It is dynamic, voltage is become steady smooth.
To sum up, by adopting the above-described technical solution, the beneficial effects of the utility model are：
First, it is single by introducing signal output isolation between external system in high integration signal processing unit IC-MQF
Member, on the one hand imported into power supply or ground by its transient pulse, the electrostatic strong jamming effectively isolated in industrial environment, avoids it
Momentary pulse causes system operation irregularity even directly to damage chip, plays a part of release high pressure, protection port；On the other hand
Influence of the foreign impacts to grating scale gathered data is avoided, ensure that the reliability of data.
2nd, the introducing of PMU, the unstable infringement brought to grating scale of external power source has been prevented, while has worked as and use
Family is when using grating scale during the operation power line of grating scale is the positive and negative level reversal connection of mistake, the power management list inside grating scale
The MIC5205 chips of member stop the power supply to mainboard using its internal anti-level defencive function, in order to avoid burn out grating scale member device
Part, play a part of protecting grating scale.In addition, PMU can bear external high voltage impact, outside can be born
16V control sources, when control source is too high, over-voltage protecting function is opened, in order to avoid grating scale internal component is burnt out, well
Play protection grating scale effect.
Brief description of the drawings
Fig. 1 is high integration signal processing unit IC-MQF and signal output isolated location circuit connection diagram；
Fig. 2 is this new theory diagram；
Fig. 3 is the circuit theory diagrams of PMU.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, it is not used to limit the utility model.Made an explanation with reference to Fig. 1, Fig. 2, Fig. 3 to originally new.
As shown in figure 1, a kind of high reliability grating scale process circuit, including grating sensor, it is connected with grating sensor
Signal processing circuit module；Signal processing circuit module includes PMU, high integration signal processing unit IC-
MQF and the signal output isolated location being connected with high integration signal processing unit IC-MQF output ends；At high integration signal
Managing unit IC-MQF includes differential amplifier circuit, shaping circuit, pulse-scaling circuit and mirror to circuit, is connected with grating sensor
To receive photosignal and determine the displacement and moving direction of displacement；IC-MQF is integrated with differential amplification, shaping, pulsimeter
Count and reflect to function, the circuit compared to original separation reduces the volume of whole grating scale, defeated beneficial to PMU, signal
Go out the placement of isolated location, IC-MQF is also equipped with reverse polarity protection, adjustable constant current output, temperature detection, input and output in addition
The functions such as signal detection, automatic growth control, signal subdivision, make grating scale possess higher reliability.
As shown in figure 3, signal output isolated location, which includes the TVS transient states that 6 tunnels are connected between power supply and ground, suppresses two poles
Pipe array circuit, any road TVS Transient Suppression Diodes array circuit include two TVS transient states forward connected and suppress two poles
Manage, be connected between two TVS Transient Suppression Diodes with high integration signal processing unit IC-MQF output end.When outside is
The high reject signal of system first passes around TVS Transient Suppression Diode array circuits after entering grating scale, and TVS transient states suppress two poles
Pipe array circuit at once will curb high reject signal, avoid enter into and wafer damage is caused inside grating scale.
When transient pulse peak point current occurs, once inversely suppress into the interference voltage of grating scale more than TVS transient states
The clamp voltage Vc (0.9≤V (BR) (just)/V (BR) (anti-)≤- 1.1) of diode, TVS Transient Suppression Diodes will be hit
Wear, and maximum clamp value is risen to by breakdown voltage value, as pulse current exponentially declines, clamp voltage also declines,
Return to original state.Two diodes forward connect, and can absorb positive interference signal and absorb negative interference signal, respectively
Into power supply and ground.Therefore, TVS can suppress the impact for the pulse power being likely to occur, so as to effectively protect electronic circuit, just
It can at once be suppressed, avoid enter into signal processing chip and cause to damage chip.TVS diode can bear outside ± 15KV
Voltge surge.
Grating sensor includes being installed on the scale grating of affixed side and is installed on the grating reading head of mobile side, and grating is read
Several by light source, convergent lens, indication grating, photoelectric cell；Photoelectric cell and high integration signal processing unit IC-MQF are poor
Dividing amplifier in connection, the first signal is sent into shaping circuit to obtain duty to obtain phase difference as 90 ° of the first signal
Than for 1：1 secondary signal, secondary signal be respectively fed to pulse-scaling circuit and reflect to circuit with obtain the movement of grating scale away from
From and direction.
As shown in Fig. 2 PMU uses power management chip MIC5205, power management chip MIC5205's is defeated
Enter to hold IN to be connected with external power source and meet filter capacitor C11 to ground, resistance point is parallel between output end OUT and earth terminal GND
Depressor and filter circuit C12, resitstance voltage divider include divider resistance R11, R12, and adjustable voltage stabilizer feed back input is connected to resistance
Between voltage divider resistance R11, R12.MIC5205 chip internals carry overvoltage protection, anti-level protection, chip output current
Greatly, environment temperature adapts to wide, the features such as strong antijamming capability, is designed to realize by outside bleeder circuit and filter circuit
The regulation of output voltage, and its constant voltage exported is matched with IC-MQF by regulation, and in the input and output of chip
End can be good at suppressing the fluctuation of voltage added with filter circuit, voltage is become steady smooth.
PMU external input voltage scope+2.5V arrives+16V, and MIC5205 data understands constant pressure output formula
For：Vout=1.242V* (1+R12/R11)=1.242* (1+56/20)=4.7196V.IC-MQF chip power supply voltages are
4.3V to 5.5V, by the resistance value for configuring bleeder circuit：R11=20K R12=56K, MIC5205 can constant pressure output 4.7V electricity
Pressure is well positioned to meet inside chip power supply.
Preferred embodiment of the present utility model is these are only, it is all in this practicality not to limit the utility model
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (3)
1. a kind of high reliability grating scale process circuit, it is characterised in that connect including grating sensor, with the grating sensor
The signal processing circuit module connect；The signal processing circuit module includes PMU, high integration signal transacting list
First IC-MQF and the signal output isolated location being connected with high integration signal processing unit IC-MQF output ends；It is described highly integrated
Spending signal processing unit IC-MQF includes differential amplifier circuit, shaping circuit, pulse-scaling circuit and mirror to circuit, is passed with grating
Sensor is connected to receive photosignal and determine the displacement and moving direction of displacement；
The signal output isolated location includes the TVS Transient Suppression Diode array circuits that 6 tunnels are connected between power supply and ground,
Any road TVS Transient Suppression Diodes array circuit includes two TVS Transient Suppression Diodes forward connected, described two
Output end between TVS Transient Suppression Diodes with high integration signal processing unit IC-MQF is connected.
A kind of 2. high reliability grating scale process circuit as claimed in claim 1, it is characterised in that the grating sensor bag
The scale grating for being installed on affixed side and the grating reading head for being installed on mobile side are included, the grating reading head is by light source, convergence
Lens, indication grating, photoelectric cell；The photoelectric cell inputs with high integration signal processing unit IC-MQF difference amplifiers
To obtain phase difference as 90 ° of the first signal, first signal is sent into shaping circuit to obtain dutycycle as 1 for end connection：1
Secondary signal, the secondary signal are respectively fed to pulse-scaling circuit and reflected to circuit to obtain the displacement of grating scale and side
To.
A kind of 3. high reliability grating scale process circuit as claimed in claim 1, it is characterised in that the PMU
Using power management chip MIC5205, the input IN of the power management chip MIC5205 is connected with external power source and connects filter
Ripple electric capacity C11To ground, resitstance voltage divider and filter circuit C are parallel between output end OUT and earth terminal GND12, the resistance point
Depressor includes divider resistance R11, R12, adjustable voltage stabilizer feed back input is connected to resitstance voltage divider divider resistance R11, R12Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720807700.0U CN206930265U (en) | 2017-07-05 | 2017-07-05 | A kind of high reliability grating scale process circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720807700.0U CN206930265U (en) | 2017-07-05 | 2017-07-05 | A kind of high reliability grating scale process circuit |
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| Publication Number | Publication Date |
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| CN206930265U true CN206930265U (en) | 2018-01-26 |
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| CN201720807700.0U Active CN206930265U (en) | 2017-07-05 | 2017-07-05 | A kind of high reliability grating scale process circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985480A (en) * | 2019-12-02 | 2021-06-18 | 广州市合熠智能科技股份有限公司 | Integrated circuit suitable for multiple photoelectric sensors and control method thereof |
-
2017
- 2017-07-05 CN CN201720807700.0U patent/CN206930265U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985480A (en) * | 2019-12-02 | 2021-06-18 | 广州市合熠智能科技股份有限公司 | Integrated circuit suitable for multiple photoelectric sensors and control method thereof |
| CN112985480B (en) * | 2019-12-02 | 2023-01-06 | 广州市合熠智能科技股份有限公司 | Integrated circuit suitable for multiple photoelectric sensors and control method thereof |
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