CN103116163A - Laser sense-and-response distance measuring device and control method - Google Patents
Laser sense-and-response distance measuring device and control method Download PDFInfo
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- CN103116163A CN103116163A CN2013100326798A CN201310032679A CN103116163A CN 103116163 A CN103116163 A CN 103116163A CN 2013100326798 A CN2013100326798 A CN 2013100326798A CN 201310032679 A CN201310032679 A CN 201310032679A CN 103116163 A CN103116163 A CN 103116163A
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Abstract
The invention relates to a laser sense-and-response distance measuring device and a control method. The laser sense-and-response distance measuring device comprises a low-frequency clock module, a laser emitter, a time-to-digital conversion module, a control host and a plurality of photoelectric sensors. The control host and the photoelectric sensors are respectively connected to the time-to-digital conversion module. The control host is connected with the laser emitter. The time-to-digital conversion module is of two-segment type, and comprises a low-segment time-to-digital conversion module and a higher-segment time-to-digital conversion module. The low-segment time-to-digital conversion module and the high-segment time-to-digital conversion module are respectively located inside and outside a pixel, and a complete high-frequency counting function is functionally realized. By the laser sense-and-response distance measuring device and the control method, high-accuracy counting can be realized.
Description
Technical field
The present invention relates to a kind of laser sensing response distance measuring equipment and control method.
Background technology
Because some superperformances of infrared laser are widely used at industry, agricultural, life ﹠ amusement, national defence and scientific research field, become the important component part in Modern High-Tech field.For now, the infrared laser ranging counting that generally uses also can't satisfy the range observation requirement of some special dimensions, and the measuring accuracy, the reduction infrared laser ranging that how to improve infrared laser ranging are the problems that present various countries scientific research personnel is making great efforts solution always to specific (special) requirements, the reduction equipment manufacturing cost of measurement environment.
Laser ranging mode principle as shown in Figure 1, generating laser is to laser pulse of target object emission, and measure laser pulse from being transmitted into arrival target object back reflection, get back to the two-way time of laser pulse receiver, according to this two-way time and the light velocity, calculate the distance between target object and the laser pulse receiver, as to establish the airborne light velocity be c, be t the two-way time of laser, then the distance R between target object and the laser pulse receiver is R=ct/2, and then according to obtaining distance R, realize range finding or imaging to target object.
Traditional laser ranging system, arrive the target object back reflection at laser pulse from being transmitted into, get back to the measuring accuracy aspect of the two-way time of laser pulse receiver, also not enough to some extent, can't reach high-precision requirement, like this, when small-sized or miniature target devices being found range or during imaging, will cause data measured not accurate enough, and cause to realize accurately target object being found range or the purpose of imaging.
Summary of the invention
Technical matters to be solved by this invention provides a kind of laser sensing response distance measuring equipment that can realize high accuracy count.
Corresponding therewith, technical matters to be solved by this invention provides a kind of laser sensing response distance measuring equipment based on the present invention's design, can realize the range finding control method of high accuracy count.
The present invention is in order to solve the problems of the technologies described above by the following technical solutions: the present invention has designed a kind of laser sensing response distance measuring equipment, comprise the low-frequency clock module, generating laser, the time figure conversion module, and the main control system that is connected with the time figure conversion module respectively, several photoelectric sensors, main control system is connected with generating laser, wherein, the time figure conversion module comprises the first either-or switch and several high section time figure conversion modules, the quantity of photoelectric sensor is consistent with the quantity of high section time figure conversion module, each photoelectric sensor is being connected with each high section time figure conversion module of correspondence respectively, high frequency clock signal is connected with the input end of the first either-or switch respectively with the low-frequency clock module, and the output terminal of the first either-or switch is connected with each high section time figure conversion module respectively; Described time figure conversion module also comprises a low section time figure conversion module that is connected with each high section time figure conversion module respectively; Low section time figure conversion module comprises the second either-or switch and several phase inverters, each phase inverter series connection consists of delay cell, the input end of delay cell is connected with the output terminal of the second either-or switch, simultaneously, the output terminal of delay cell is connected with one of them input end of the second either-or switch; By controlling the second either-or switch, so that low section time figure conversion module produces high frequency clock signal in counting, be delivered to respectively in each high section time figure conversion module through the first either-or switch by the output terminal of delay cell.
As a kind of optimal technical scheme of the present invention: a described high section time figure conversion module comprises interconnective linear feedback shift register and data-carrier store, and simultaneously, described low section time figure conversion module is connected with each data-carrier store respectively.
As a kind of optimal technical scheme of the present invention: also comprise the multi-channel high-accuracy delay controller, described main control system is connected with described time figure conversion module, generating laser respectively behind the multi-channel high-accuracy delay controller.
As a kind of optimal technical scheme of the present invention: also comprise several quenching restoring circuit modules, the quantity of quenching restoring circuit module is consistent with the quantity of described photoelectric sensor, and each photoelectric sensor is connected with corresponding described high section time figure conversion module through quenching restoring circuit module respectively.
As a kind of optimal technical scheme of the present invention: described photoelectric sensor is the G-APD detector array.
A kind of laser sensing response distance measuring equipment of the present invention adopts above technical scheme compared with prior art, has following technique effect:
(1) in the laser sensing response distance measuring equipment of the present invention's design, adopts low section time figure reforming unit to cooperate high section time figure reforming unit to count, can realize high accuracy count, thereby finish the purpose of precision distance measurement;
(2) in the laser sensing response distance measuring equipment of the present invention's design, the structure of low section time figure reforming unit has guaranteed to control exactly low section time figure reforming unit and has carried out work, thereby guaranteed that this device carries out high accuracy count;
(3) in the laser sensing response distance measuring equipment of the present invention's design, high section time figure conversion module adopts the structure of interconnective linear feedback shift register and data-carrier store, need to be when not carrying out high-frequency count, the extra register that increases, effectively controlled the volume of device, so that the laser sensing response distance measuring equipment of the present invention's design has little, the lightweight advantage of volume;
(4) in the laser sensing response distance measuring equipment of the present invention's design, adopt the multi-channel high-accuracy delay controller as the buffering between main control system and the controlled device and interface, guaranteed the strict coupling of initial work between each controlled device;
(5) in the laser sensing response distance measuring equipment of the present invention's design, between the high section time figure conversion module of photoelectric sensor and correspondence, quenching restoring circuit module is set, can effectively realizes control by quenching restoring circuit module to photoelectric sensor;
(6) in the laser sensing response distance measuring equipment of the present invention's design, photoelectric sensor is the G-APD detector array, has the single photon detection ability, can realize surveying to faint laser echo signal, and can realize high-precision starting point differentiation, thereby determine exactly the laser flying time; And the G-APD detector array is again a kind of all solid state photoelectric detector, and not only volume is little, lightweight, reliability is high, but also available existing low-light electronic technology carries out large-scale production.
Corresponding therewith, the present invention is in order to solve the problems of the technologies described above by the following technical solutions: the present invention has designed a kind of control method based on laser sensing response distance measuring equipment, comprises the steps:
Step 1. main control system control generating laser is luminous to testee;
Simultaneously, main control system is controlled the first either-or switch, sends high frequency clock signal to each high section time figure conversion module, and each high section time figure conversion module begins high-frequency count;
Each photoelectric sensor of step 2. receives respectively the laser through the testee reflection, be converted into electric signal, be sent to each self-corresponding high section time figure conversion module, the high section time figure conversion module that receives electric signal quits work, and the count status inner to this moment latchs;
The first either-or switch in the step 3. main control system control time numeral conversion module, make the low-frequency clock module send low-frequency clock signal to each high section time figure conversion module respectively, each high section time figure conversion module begins low-frequency transmission, and the count status that latchs is exported;
Wherein, in the described step 1, by the second either-or switch in the low section of the main control system control time figure conversion module, the low section of control time figure conversion module begins counting and produces high frequency clock signal, and control the first either-or switch by main control system simultaneously, to be sent to respectively by the high frequency clock signal that low section time figure conversion module produces in each high section time figure conversion module, and make each high section time figure conversion module begin high-frequency count;
In the step 2, receive by corresponding photoelectric sensor and send the high section time figure conversion module of electric signal when quitting work, inner count status is latched, with the count information that hangs down this moment in the section time figure conversion module, be sent in this out-of-work high section time figure conversion module and latch, form complete count information by the count information in the high section time figure conversion module and the count information in the time figure conversion module of location, low section time figure conversion module continues counting simultaneously.
As a kind of optimal technical scheme of the present invention: the control signal that described main control system sends is controlled respectively described time figure conversion module and generating laser again behind described multi-channel high-accuracy delay controller.
As a kind of optimal technical scheme of the present invention: in the described step 2, each photoelectric sensor receives respectively the laser through the testee reflection, be converted into electric signal, be sent to first in the described quenching restoring circuit module corresponding with each photoelectric sensor, again by the quenching restoring circuit module that receives electric signal, high section time figure conversion module to correspondence sends stop signal, and it is quit work.
As a kind of optimal technical scheme of the present invention: in the described step 2, the described quenching restoring circuit module that receives the electric signal that corresponding photoelectric sensor sends also resets to the photoelectric sensor corresponding with it.
As a kind of optimal technical scheme of the present invention: in the described step 3, also comprise the second either-or switch in the low section of the main control system control time figure conversion module, the low section of a control time figure conversion module quits work.
A kind of control method based on laser sensing response distance measuring equipment of the present invention adopts above technical scheme compared with prior art, has following technique effect:
(1) a kind of control method based on laser sensing response distance measuring equipment of the present invention's design can make things convenient for, realize accurately the range finding of high accuracy count.
Description of drawings
Fig. 1 is laser ranging mode schematic diagram;
Fig. 2 is the module by signal control chart of the laser sensing response distance measuring equipment that designs of the present invention;
Fig. 3 is the module by signal figure of the laser sensing response distance measuring equipment that designs of the present invention;
Fig. 4 is the application synoptic diagram of the laser sensing response distance measuring equipment that designs of the present invention;
Fig. 5 is the sequential relationship synoptic diagram of control signal in the laser sensing response distance measuring equipment that designs of the present invention;
Fig. 6 is the sequential relationship synoptic diagram of three kinds of synchronizing signals in the laser sensing response distance measuring equipment output procedure that designs of the present invention.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described in further detail.
As shown in Figure 2, the present invention has designed a kind of laser sensing response distance measuring equipment, comprise the low-frequency clock module, generating laser, the time figure conversion module, and the main control system that is connected with the time figure conversion module respectively, several photoelectric sensors, main control system is connected with generating laser, wherein, the time figure conversion module comprises the first either-or switch and several high section time figure conversion modules, the quantity of photoelectric sensor is consistent with the quantity of high section time figure conversion module, each photoelectric sensor is being connected with each high section time figure conversion module of correspondence respectively, high frequency clock signal is connected with the input end of the first either-or switch respectively with the low-frequency clock module, and the output terminal of the first either-or switch is connected with each high section time figure conversion module respectively; Described time figure conversion module also comprises a low section time figure conversion module that is connected with each high section time figure conversion module respectively; Low section time figure conversion module comprises the second either-or switch and several phase inverters, each phase inverter series connection consists of delay cell, the input end of delay cell is connected with the output terminal of the second either-or switch, simultaneously, the output terminal of delay cell is connected with one of them input end of the second either-or switch; By controlling the second either-or switch, so that low section time figure conversion module produces high frequency clock signal in counting, be delivered to respectively in each high section time figure conversion module through the first either-or switch by the output terminal of delay cell.
In the laser sensing response distance measuring equipment of the present invention's design, adopt low section time figure reforming unit to cooperate high section time figure reforming unit to count, can realize high accuracy count, thereby finish the purpose of precision distance measurement; And the structure of low section time figure reforming unit, guaranteed to control exactly low section time figure reforming unit and carried out work, thereby guaranteed that this device carries out high accuracy count.
As a kind of optimal technical scheme of the present invention: a described high section time figure conversion module comprises interconnective linear feedback shift register and data-carrier store, and simultaneously, described low section time figure conversion module is connected with each data-carrier store respectively.
In the laser sensing response distance measuring equipment of the present invention's design, high section time figure conversion module adopts the structure of interconnective linear feedback shift register and data-carrier store, so that linear feedback shift register is when carrying out high-frequency count, do not need additionally to increase register, effectively controlled the volume of device, so that the laser sensing response distance measuring equipment of the present invention's design has little, the lightweight advantage of volume.
As a kind of optimal technical scheme of the present invention: also comprise the multi-channel high-accuracy delay controller, described main control system is connected with described time figure conversion module, generating laser respectively behind the multi-channel high-accuracy delay controller.
In the laser sensing response distance measuring equipment of the present invention's design, adopt the multi-channel high-accuracy delay controller as the buffering between main control system and the controlled device and interface, guaranteed the strict coupling of initial work between each controlled device, so that time figure conversion module and generating laser can be accepted control command simultaneously, and start working simultaneously, effectively realized the purpose of high accuracy count.
The present invention is in the middle of actual application, and the multi-channel high-accuracy delay controller can adopt DG645 eight passages numeral delay pulse generator, and time-delay resolution is 5ps, and reference time delay is 0～2000 s, pulsed frequency 10MHz.
As a kind of optimal technical scheme of the present invention: also comprise several quenching restoring circuit modules, the quantity of quenching restoring circuit module is consistent with the quantity of described photoelectric sensor, and each photoelectric sensor is connected with corresponding described high section time figure conversion module through quenching restoring circuit module respectively.
In the laser sensing response distance measuring equipment of the present invention's design, between the high section time figure conversion module of photoelectric sensor and correspondence, quenching restoring circuit module is set, can effectively realize control by quenching restoring circuit module to photoelectric sensor, can reset to coupled photoelectric sensor by quenching restoring circuit module.
As a kind of optimal technical scheme of the present invention: described photoelectric sensor is the G-APD detector array, i.e. array Geiger mode angular position digitizer avalanche diode receiver.
In the laser sensing response distance measuring equipment of the present invention's design, photoelectric sensor is the G-APD detector array, the G-APD detector array has the single photon detection ability, can realize surveying to faint laser echo signal, and can realize high-precision starting point differentiation, thereby can determine exactly the flight time of laser; And the G-APD detector array is again a kind of all solid state photoelectric detector, and not only volume is little, lightweight, reliability is high, but also available existing low-light electronic technology carries out large-scale production.
Corresponding therewith, as shown in Figures 2 and 3, the present invention has designed a kind of control method based on laser sensing response distance measuring equipment, comprises the steps:
Step 1. main control system control generating laser is luminous to testee;
Simultaneously, main control system is controlled the first either-or switch, sends high frequency clock signal to each high section time figure conversion module, and each high section time figure conversion module begins high-frequency count;
Each photoelectric sensor of step 2. receives respectively the laser through the testee reflection, be converted into electric signal, be sent to each self-corresponding high section time figure conversion module, the high section time figure conversion module that receives electric signal quits work, and the count status inner to this moment latchs;
The first either-or switch in the step 3. main control system control time numeral conversion module, make the low-frequency clock module send low-frequency clock signal to each high section time figure conversion module respectively, each high section time figure conversion module begins low-frequency transmission, and the count status that latchs is exported;
Wherein, in the described step 1, by the second either-or switch in the low section of the main control system control time figure conversion module, the low section of control time figure conversion module begins counting and produces high frequency clock signal, and control the first either-or switch by main control system simultaneously, to be sent to respectively by the high frequency clock signal that low section time figure conversion module produces in each high section time figure conversion module, and make each high section time figure conversion module begin high-frequency count;
In the step 2, receive by corresponding photoelectric sensor and send the high section time figure conversion module of electric signal when quitting work, inner count status is latched, the electric signal that photoelectric sensor sends is also controlled the count information that will hang down this moment in the section time figure conversion module, be sent in this out-of-work high section time figure conversion module and latch, form complete count information by the count information in the high section time figure conversion module and the count information in the time figure conversion module of location, low section time figure conversion module continues counting simultaneously.
As a kind of optimal technical scheme of the present invention: the control signal that described main control system sends is controlled respectively described time figure conversion module and generating laser again behind described multi-channel high-accuracy delay controller.
As a kind of optimal technical scheme of the present invention: in the described step 2, each photoelectric sensor receives respectively the laser through the testee reflection, be converted into electric signal, be sent to first in the described quenching restoring circuit module corresponding with each photoelectric sensor, again by the quenching restoring circuit module that receives electric signal, high section time figure conversion module to correspondence sends stop signal, and it is quit work.
As a kind of optimal technical scheme of the present invention: in the described step 2, the described quenching restoring circuit module that receives the electric signal that corresponding photoelectric sensor sends also resets to the photoelectric sensor corresponding with it.
As a kind of optimal technical scheme of the present invention: in the described step 3, also comprise the second either-or switch in the low section of the main control system control time figure conversion module, the low section of a control time figure conversion module quits work.
A kind of control method based on laser sensing response distance measuring equipment of the present invention's design can make things convenient for, realize accurately the range finding of high accuracy count.
The laser sensing response distance measuring equipment of the present invention's design and control method are in the middle of actual application, as use in the application of this device sensing circuit pixel cell, described each high section time figure conversion module and quenching restoring circuit module, the photoelectric sensor corresponding with it are distinguished array distribution in each circuit pixel cell, comprise the steps:
The control signal that step 1. main control system sends is controlled respectively described time figure conversion module and generating laser more simultaneously behind described multi-channel high-accuracy delay controller; Wherein, main control system control generating laser is luminous to testee;
Simultaneously, the second either-or switch in the low section of the main control system control time figure conversion module, the low section of control time figure conversion module switches to closed loop configuration, begin counting and produce high frequency clock signal, and control the first either-or switch by main control system simultaneously, to be sent to respectively by the high frequency clock signal that low section time figure conversion module produces in each high section time figure conversion module, and make each high section time figure conversion module begin high-frequency count;
Each photoelectric sensor of step 2. receives respectively the laser through the testee reflection, be converted into electric signal, be sent in the described quenching restoring circuit module corresponding with each photoelectric sensor, by the quenching restoring circuit module that receives electric signal, high section time figure conversion module to correspondence sends stop signal, the high section time figure conversion module that receives stop signal quits work, the count status inner to this moment latchs, simultaneously, the electric signal that photoelectric sensor sends is also controlled the count information that will hang down this moment in the section time figure conversion module, be sent in this out-of-work high section time figure conversion module and latch, form complete count information by the count information in the high section time figure conversion module and the count information in the time figure conversion module of location, low section time figure conversion module continues counting simultaneously;
, receive the quenching restoring circuit module of the electric signal of corresponding photoelectric sensor transmission therebetween, also the photoelectric sensor corresponding with it resetted;
The second either-or switch in the low section of the step 3. main control system control time figure conversion module, the low section of control time figure conversion module quits work, the count mode of whole device finishes, and writes particular data to the circuit pixel cell of no count, is used for this circuit pixel cell no count of expression; The first either-or switch in the main control system control time numeral conversion module, make the low-frequency clock module send low-frequency clock signal to each high section time figure conversion module respectively, each high section time figure conversion module begins low-frequency transmission, and the count status that latchs is exported;
Wherein, the high frequency time numeral conversion module of array distribution in each circuit pixel cell, in the work of carrying out low-frequency transmission, high frequency time numeral conversion module in circuit pixel cell will count information wherein be delivered in the high frequency time numeral conversion module in next adjacent circuit pixel cell, like this, the high frequency time numeral conversion module count information that it is inner in each adjacent circuit pixel cell, successively transmission, and final serial output.By above step, namely realized the application of sensing circuit pixel cell.
As shown in Figure 3 and Figure 4, above step 1 in 3, each bar instruction that main control system is controlled each controlled device, all pass through time-sequence control module, according to the control requirement of practical application, transfer and send, wherein, time-sequence control module carries out work based on the low-frequency clock module.
In the laser sensing response distance measuring equipment of the present invention's design, increase a multi-channel high-accuracy delay controller as the buffering between main control system and the controlled device and interface, realized the strict coupling of origination action between each controlled device.Wherein, the steering order that main control system will be controlled this device sends to the multi-channel high-accuracy delay controller, rather than directly issues different controlled devices; After the multi-channel high-accuracy delay controller receives the steering order of main control system transmission, after its delay a period of time, be transmitted to the controlled device of appointment by different passages.
Like this, by the accurate setting to each channel delay time of multi-channel high-accuracy delay controller, can realize the simultaneously effect of starting-up response of each controlled device; The control method that this increase multi-channel high-accuracy delay controller cushions begins counting immediately after arriving time delay, the synchronization generating laser also starts luminous.The benefit of this control method is the flexibility ratio that has greatly increased system applies.
As shown in Figure 4, during real work, main control system transmits control signal to controlled device by the multi-channel high-accuracy delay controller, wherein, the required initial state setting of counting work is finished in one section delay that the utilization of time figure conversion module is brought by the multi-channel high-accuracy delay controller, and make high section time figure conversion module enter the high-frequency count pattern, generating laser is through same delay Emission Lasers, and namely high section time figure conversion module initial time of beginning to count is identical with the initial time point that generating laser begins Emission Lasers.
After the laser through the testee reflection is received by the photoelectric sensor induction, by the high section time figure conversion module transmission stop signal of corresponding with it quenching restoring circuit module to its correspondence, the high section of control time figure conversion module stops counting, and to this moment inner count status latch, simultaneously, the electric signal that photoelectric sensor sends is also controlled the count information that will hang down this moment in the section time figure conversion module, be sent in this out-of-work high section time figure conversion module and latch, form complete count information by the count information in the high section time figure conversion module and the count information in the time figure conversion module of location, low section time figure conversion module continues counting simultaneously.
In the laser sensing response distance measuring equipment of the present invention's design, the time figure conversion module adopts the two-part structure, comprise high section time figure conversion module and low section time figure conversion module, wherein, low section time figure conversion module consists of to be opened/closed loop delay line type structure, enter the closed loop delay structure through main control system control, when a pulse input, arrive the count information that some phase inverters are differentiated concrete low section according to this pulse; And produce high frequency clock signal by the delay unit closed loop that phase inverter consists of, this high frequency clock signal is delivered in each high section time figure conversion module of array distribution; Enter open loop structure through main control system control, so that low section time figure conversion module quits work; In the laser sensing response distance measuring equipment of the present invention's design, the quantity of low section time figure conversion module is one, is arranged on outside the circuit pixel cell, counts as the global clock section of hanging down, and cooperate each high section time figure conversion module, realize high accuracy count.
Time figure conversion module among the present invention is in the middle of actual application, and wherein low section time figure modular converter is realized low section number conversion by phase-detection, specifically selects the best transition configuration of 8 phase places, 3 bits; High section time figure conversion module adopts 10 bit linear feedback shift register counters to realize, 13 complete bit high accuracy count are finished in both cooperations.
In concrete the application, as shown in Figure 4 and Figure 5, the second either-or switch in the low section time figure conversion module, high level advances such as mode of operation for the low section of control time figure conversion module; The first either-or switch, high level is the low section of access time figure conversion module output signal, low level is the low-frequency clock signal of access low-frequency clock module.Main control system sends control signal to the multi-channel high-accuracy delay controller, the multi-channel high-accuracy delay controller is through time-delay and pulsewidth setting, corresponding delayed control signal is transferred to respectively controlled device simultaneously, and generating laser receive delay control signal sends laser; Wherein, gate-control signal is the control signal of the first either-or switch and the second either-or switch; Gate-control signal is between high period, and this is the count cycle; Each quenching restoring circuit module is in the receiving mode of corresponding photoelectric sensor, and photoelectric sensor is waited for and received photon; Low section time figure conversion module carries out the low section counting of the overall situation, and produces simultaneously high frequency clock signal, flows to each high section time figure conversion module, carries out respectively high-frequency count; When photoelectric sensor receives photon, quenching restoring circuit module by correspondence produces stop signal, send to corresponding high section time figure conversion module, high section time figure conversion module quits work, and to this moment inner count status latch, simultaneously, the electric signal that photoelectric sensor sends is also controlled the count information that will hang down this moment in the section time figure conversion module, be sent in this out-of-work high section time figure conversion module and latch, form complete count information by the count information in the high section time figure conversion module and the count information in the time figure conversion module of location, low section time figure conversion module continues counting simultaneously.Because for each different circuit pixel cell, different photon due ins are different, and the latch time of corresponding count status is also just different.
As shown in Figure 6, control the first either-or switch and the second either-or switch by main control system, so that the count mode of this device finishes, enter the low-frequency transmission pattern, to the count information for each circuit pixel cell, take to export line by line count information, wherein, the mode of the data series read-out is accompanied by in addition three synchronizing signals that data are exported, and is respectively frame synchronizing signal, word sync signal and bit synchronization signal, the output digit signals bits per inch is according to remaining unchanged in the cycle a bit synchronization, in the practical application of 13 bit high accuracy count, namely transmission 1 bit data in each bit synchronization cycle is transmitted 13 bit data in the circuit pixel cell altogether; Word sync signal is each circuit pixel cell 13 Bit data synchronous signal transmission.Frame synchronizing signal is the synchronizing signal of all circuit pixel cell transmission in the whole system.By the time data transmission is complete, and the low-frequency clock module is closed in control, to reduce the quiescent dissipation of system.
Time figure conversion module among the present invention adopts two-part, comprises low section time figure conversion module and high section time figure conversion module, lays respectively in the outer and pixel of pixel, from the complete high-frequency count function of function realization.In this device, low side time figure conversion module is shared by system and is arranged on outside the circuit pixel cell, carries out meticulous counting; High section time figure conversion module is arranged in each circuit pixel cell, is respectively each circuit pixel cell and slightly counts.Hang down outside the circuit pixel cell under the synergy of high section time figure conversion module in section time figure conversion module and each circuit pixel cell, the high precision of finishing count mode quantizes, in the practical application, with the form Measuring Time of binary counting.Because the counting frequency of operation of time figure conversion module is very high, reach more than hundred megahertzes, therefore require frequency stabilization, time quantization is average.
High section time figure conversion module is that the overall situation is shared, and can make the clock synchronous of system's overall situation high, reduces relative error; High each circuit pixel cell of section time figure conversion module exclusively enjoys, and makes the data of each circuit pixel cell independent of crosstalking, the error code problem that produces when avoiding the data write circuit pixel cell of high section time figure conversion module.
The above has done detailed description to embodiments of the present invention by reference to the accompanying drawings, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skills possess, can also make a variety of changes under the prerequisite that does not break away from aim of the present invention.
Claims (10)
1. a laser sensing responds distance measuring equipment, comprise the low-frequency clock module, generating laser, the time figure conversion module, and the main control system that is connected with the time figure conversion module respectively, several photoelectric sensors, main control system is connected with generating laser, wherein, the time figure conversion module comprises the first either-or switch and several high section time figure conversion modules, the quantity of photoelectric sensor is consistent with the quantity of high section time figure conversion module, each photoelectric sensor is being connected with each high section time figure conversion module of correspondence respectively, high frequency clock signal is connected with the input end of the first either-or switch respectively with the low-frequency clock module, and the output terminal of the first either-or switch is connected with each high section time figure conversion module respectively; It is characterized in that: described time figure conversion module also comprises a low section time figure conversion module that is connected with each high section time figure conversion module respectively; Low section time figure conversion module comprises the second either-or switch and several phase inverters, each phase inverter series connection consists of delay cell, the input end of delay cell is connected with the output terminal of the second either-or switch, simultaneously, the output terminal of delay cell is connected with one of them input end of the second either-or switch; By controlling the second either-or switch, so that low section time figure conversion module produces high frequency clock signal in counting, be delivered to respectively in each high section time figure conversion module through the first either-or switch by the output terminal of delay cell.
2. described a kind of laser sensing responds distance measuring equipment according to claim 1, it is characterized in that: described high section time figure conversion module comprises interconnective linear feedback shift register and data-carrier store, simultaneously, described low section time figure conversion module is connected with each data-carrier store respectively.
3. described a kind of laser sensing responds distance measuring equipment according to claim 1, it is characterized in that: also comprise the multi-channel high-accuracy delay controller, described main control system is connected with described time figure conversion module, generating laser respectively behind the multi-channel high-accuracy delay controller.
4. described a kind of laser sensing responds distance measuring equipment according to claim 1, it is characterized in that: also comprise several quenching restoring circuit modules, the quantity of quenching restoring circuit module is consistent with the quantity of described photoelectric sensor, and each photoelectric sensor is connected with corresponding described high section time figure conversion module through quenching restoring circuit module respectively.
5. described a kind of laser sensing responds distance measuring equipment according to claim 1, and it is characterized in that: described photoelectric sensor is the G-APD detector array.
6. the control method based on the described a kind of laser sensing response distance measuring equipment of any one in the claim 1 to 5 comprises the steps:
Step 1. main control system control generating laser is luminous to testee;
Simultaneously, main control system is controlled the first either-or switch, sends high frequency clock signal to each high section time figure conversion module, and each high section time figure conversion module begins high-frequency count;
Each photoelectric sensor of step 2. receives respectively the laser through the testee reflection, be converted into electric signal, be sent to each self-corresponding high section time figure conversion module, the high section time figure conversion module that receives electric signal quits work, and the count status inner to this moment latchs;
The first either-or switch in the step 3. main control system control time numeral conversion module, make the low-frequency clock module send low-frequency clock signal to each high section time figure conversion module respectively, each high section time figure conversion module begins low-frequency transmission, and the count status that latchs is exported;
It is characterized in that: in the described step 1, by the second either-or switch in the low section of the main control system control time figure conversion module, the low section of control time figure conversion module begins counting and produces high frequency clock signal, and control the first either-or switch by main control system simultaneously, to be sent to respectively by the high frequency clock signal that low section time figure conversion module produces in each high section time figure conversion module, and make each high section time figure conversion module begin high-frequency count;
In the step 2, receive by corresponding photoelectric sensor and send the high section time figure conversion module of electric signal when quitting work, inner count status is latched, with the count information that hangs down this moment in the section time figure conversion module, be sent in this out-of-work high section time figure conversion module and latch, form complete count information by the count information in the count information in the high section time figure conversion module and the low section time figure conversion module, low section time figure conversion module continues counting simultaneously.
7. described a kind of control method based on the described a kind of laser sensing response of any one in the claim 1 to 4 distance measuring equipment according to claim 6, it is characterized in that: the control signal that described main control system sends is controlled respectively described time figure conversion module and generating laser again behind described multi-channel high-accuracy delay controller.
8. described a kind of control method based on the described a kind of laser sensing response of any one in the claim 1 to 4 distance measuring equipment according to claim 6, it is characterized in that: in the described step 2, each photoelectric sensor receives respectively the laser through the testee reflection, be converted into electric signal, be sent to first in the described quenching restoring circuit module corresponding with each photoelectric sensor, again by the quenching restoring circuit module that receives electric signal, high section time figure conversion module to correspondence sends stop signal, and it is quit work.
9. described a kind of control method based on the described a kind of laser sensing response of any one in the claim 1 to 4 distance measuring equipment according to claim 8, it is characterized in that: in the described step 2, the described quenching restoring circuit module that receives the electric signal of corresponding photoelectric sensor transmission also resets to the photoelectric sensor corresponding with it.
10. described a kind of control method based on the described a kind of laser sensing response of any one in the claim 1 to 4 distance measuring equipment according to claim 6, it is characterized in that: in the described step 3, also comprise the second either-or switch in the low section of the main control system control time figure conversion module, the low section of control time figure conversion module quits work.
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| CN111337147A (en) * | 2020-03-16 | 2020-06-26 | 东南大学 | Pixel-level laser pulse detection and measurement circuit |
| CN111337147B (en) * | 2020-03-16 | 2020-12-08 | 东南大学 | Pixel-level laser pulse detection and measurement circuit |
| CN112202425A (en) * | 2020-09-25 | 2021-01-08 | 杭州加速科技有限公司 | Clock generation unit in FPGA chip |
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