Photoelectric detection module, photoelectric detection equipment and laser ranging system

Abstract

The utility model discloses a photoelectric detection module, photoelectric detection equipment and a laser ranging system, and relates to the technical field of laser ranging, the photoelectric detection module comprises a lens module, a photoelectric detection module, a transimpedance amplification module and a signal accumulation module; the lens module is arranged towards the photoelectric detection module, and the photoelectric detection module, the transimpedance amplification module and the signal accumulation module are electrically connected in sequence, so that under the condition of reducing the detection bandwidth, the detection efficiency of reflected echo light is improved, and the product size is reduced.

Description

Technical Field

[0001] This utility model relates to the field of laser ranging technology, and in particular to a photoelectric detection module, a photoelectric detection device, and a laser ranging system. Background Technology

[0002] Laser ranging determines the distance to a target by measuring the time it takes for a laser to travel to and from the target. Specifically, the laser rangefinder emits a pulse of light, which is reflected by the object being measured. The reflected light is then received by the laser rangefinder's photodetector. Since the speed of light in the air is constant, the distance between the laser rangefinder and the object can be obtained by calculating the time difference between the emitted and received light.

[0003] The reflected light from the object under test is usually weak. To receive more light signals, large-aperture receiving lenses and large-area photodetectors are typically used. However, the junction capacitance of a photodetector is proportional to the area of ​​the detection surface. The large parasitic capacitance of a large-area photodetector leads to a low bandwidth of its transimpedance amplifier, which cannot meet the detection bandwidth requirements of ultra-narrow pulsed light. When using a small-area photodetector, to receive more reflected echoes, the receiving lens needs to reduce the focusing spot size, resulting in higher optical power per unit detection surface, which can damage the detection surface. Conversely, when the focusing spot size is large, a smaller detection surface cannot collect enough reflected echo light.

[0004] Therefore, improving the detection efficiency of reflected echo light and reducing product size while reducing the detection bandwidth are urgent technical problems that need to be solved. Utility Model Content

[0005] The main purpose of this invention is to propose a photoelectric detection module, a photoelectric detection device, and a laser ranging system, which aims to improve the detection efficiency of reflected echo light and reduce the product size while reducing the detection bandwidth.

[0006] To achieve the above objectives, this utility model proposes a photoelectric detection module, which includes: a lens module, a photoelectric detection module, a transimpedance amplification module, and a signal accumulation module.

[0007] The lens module is positioned facing the photoelectric detection module, and the photoelectric detection module, the transimpedance amplification module, and the signal accumulation module are electrically connected in sequence.

[0008] In one embodiment, the photoelectric detection module includes multiple photoelectric detectors, and the small detection surfaces of each photoelectric detector are combined into a large detection surface through a planar paving method.

[0009] In one embodiment, the transimpedance amplification module includes multiple transimpedance amplifiers, the number of which is the same as the number of detectors in the photodetector, and each transimpedance amplifier is electrically connected to a corresponding photodetector.

[0010] In one embodiment, the transimpedance amplifier includes a first operational amplifier, a first resistor, a second resistor, and a first capacitor;

[0011] The non-inverting input of the first operational amplifier is grounded, the inverting input of the first operational amplifier is electrically connected to the detector anode of the corresponding photodetector, and the output of the first operational amplifier is electrically connected to the input of the signal accumulation module through the second resistor.

[0012] The positive power supply terminal of the first operational amplifier is connected to the detector cathode of the corresponding photodetector and then connected to a positive power supply voltage, while the negative power supply terminal of the first operational amplifier is connected to a negative power supply voltage.

[0013] The first resistor and the first capacitor are connected in parallel to form a feedback transimpedance. The first end of the first resistor is electrically connected to the connection node of the first end of the first capacitor and is electrically connected to the anode of the detector. The second end of the first resistor is electrically connected to the connection node of the second end of the first capacitor and is electrically connected to the output terminal of the first operational amplifier.

[0014] In one embodiment, the signal accumulation module includes a second operational amplifier, a feedback impedance unit, an addition matching unit, and a low-pass filter unit;

[0015] The inverting input terminal of the second operational amplifier constitutes the input terminal of the signal accumulation module, and is electrically connected to the output terminal of the first operational amplifier through the second resistor;

[0016] The non-inverting input of the second operational amplifier is grounded via the addition matching unit, the positive power supply terminal of the second operational amplifier is connected to the positive power supply voltage, and the negative power supply terminal of the second operational amplifier is connected to the negative power supply voltage.

[0017] The output terminal of the second operational amplifier is electrically connected to the first terminal of the feedback impedance unit and the low-pass filter unit, respectively, and the second terminal of the feedback impedance unit is electrically connected to the inverting input terminal of the second operational amplifier.

[0018] In one embodiment, the feedback impedance unit includes a third resistor and a second capacitor, wherein the third resistor is connected in parallel with the second capacitor to form a feedback impedance;

[0019] The first end of the third resistor is electrically connected to the connection point of the first end of the second capacitor, forming the first end of the feedback impedance unit, which is electrically connected to the output end of the second operational amplifier.

[0020] The second end of the third resistor is electrically connected to the connection point of the second end of the second capacitor, forming the second end of the feedback impedance unit, which is electrically connected to the inverting input of the second operational amplifier.

[0021] In one embodiment, the low-pass filter unit includes a third capacitor, a fourth capacitor, and a fourth resistor;

[0022] The first end of the fourth resistor is electrically connected to the first end of the third capacitor and the output end of the second operational amplifier, respectively; the second end of the fourth resistor is electrically connected to the first end of the fourth capacitor.

[0023] The second terminal of the third capacitor and the second terminal of the fourth capacitor are respectively grounded.

[0024] In one embodiment, the addition matching unit is a fifth resistor.

[0025] In addition, this utility model also proposes a photoelectric detection device, which includes at least the photoelectric detection module described in any one of the above claims.

[0026] In addition, this utility model also proposes a laser ranging system, which includes at least the aforementioned photoelectric detection device.

[0027] This utility model's photoelectric detection module integrates a lens module, a photoelectric detection module, a transimpedance amplification module, and a signal accumulation module. While reducing the detection bandwidth, it achieves the goals of improving the detection efficiency of reflected echo light and reducing product size. Specifically, the photoelectric detection module has multiple photodetectors. The small detection surfaces of all photodetectors are combined into a large detection surface through a planar mounting method, effectively shortening the distance between the lens module and the large detection surface, thus reducing the product size. Furthermore, since the large detection surface is composed of multiple planarly mounted small detection surfaces, the light power per unit area of ​​each small detection surface can be effectively reduced, avoiding the phenomenon of light intensity from the reflected echo light projected by the lens module damaging the detection surface. In addition, since the photoelectric detection module itself is composed of multiple small detection surface photodetectors, it can effectively avoid the phenomenon of low detection bandwidth caused by a large junction capacitance of a single large detection surface photodetector. Next, the transimpedance amplification module and the signal accumulation module collect and output the electrical signals of all reflected echo light, ultimately achieving the advantages of reducing size, increasing the optical loss threshold, and increasing the detection signal bandwidth without reducing the photoelectric signal gain. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the structure of an embodiment of the photoelectric detection module provided by this utility model;

[0030] Figure 2 This is a schematic diagram of the planar installation of the photodetector according to an embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the transimpedance amplifier circuit involved in an embodiment of the present utility model;

[0032] Figure 4 This is a schematic diagram of the photoelectric detection module circuit involved in an embodiment of the present utility model;

[0033] Figure 5 This is a block diagram of the photoelectric detection device involved in the embodiments of this utility model.

[0034] Explanation of icon numbers:

[0035] 10. Lens module; 20. Photodetector module; 30. Transimpedance amplifier module; 40. Signal accumulation module; D1. Photodetector; 31. Transimpedance amplifier; U1. First operational amplifier; R1. First resistor; R2. Second resistor; C1. First capacitor; U2. Second operational amplifier; 41. Feedback impedance unit; 42. Addition matching unit; 43. Low-pass filter unit; R3. Third resistor; C2. Second capacitor; C3. Third capacitor; C4. Fourth capacitor; R4. Fourth resistor; R5. Fifth resistor.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] Laser ranging determines the distance to a target by measuring the time it takes for a laser to travel to and from the target. Specifically, the laser rangefinder emits a pulse of light, which is reflected by the object being measured. The reflected light is then received by the laser rangefinder's photodetector. Since the speed of light in the air is constant, the distance between the laser rangefinder and the object can be obtained by calculating the time difference between the emitted and received light.

[0041] The reflected light from the object under test is usually weak. To receive more light signals, large-aperture receiving lenses and large-area photodetectors are typically used. However, the junction capacitance of a photodetector is proportional to the area of ​​the detection surface. The large parasitic capacitance of a large-area photodetector leads to a low bandwidth of its transimpedance amplifier, which cannot meet the detection bandwidth requirements of ultra-narrow pulsed light. When using a small-area photodetector, to receive more reflected echoes, the receiving lens needs to reduce the focusing spot size, resulting in higher optical power per unit detection surface, which can damage the detection surface. Conversely, when the focusing spot size is large, a smaller detection surface cannot collect enough reflected echo light.

[0042] Therefore, improving the detection efficiency of reflected echo light and reducing product size while reducing the detection bandwidth are urgent technical problems that need to be solved.

[0043] In summary, in order to overcome the aforementioned technical deficiencies, this utility model proposes a photoelectric detection module, a photoelectric detection device, and a laser ranging system.

[0044] In one embodiment of this utility model, please refer to Figure 1 , Figure 1 This is a schematic diagram of a structure of an embodiment of the photoelectric detection module provided by this utility model. The photoelectric detection module includes a lens module 10, a photoelectric detection module 20, a transimpedance amplification module 30, and a signal accumulation module 40; the lens module 10 is disposed facing the photoelectric detection module 20, and the photoelectric detection module 20, the transimpedance amplification module 30, and the signal accumulation module 40 are electrically connected in sequence.

[0045] In this embodiment, the reflected echo light from the object under test is converged by the lens module 10 and projected onto the large detection surface of the photodetector module 20 to form a light spot. The diameter of this light spot is smaller than the equivalent diameter at the center of the large detection surface, so that all the reflected echo light received by the lens module 10 is projected onto the large detection surface. Next, each photodetector D1 in the photodetector module 20 converts the reflected echo light received by its small detection surface into a photocurrent and transmits it to the corresponding transimpedance amplifier 31 in the transimpedance amplifier module 30. Each transimpedance amplifier 31 converts the photocurrent sent by the corresponding photodetector D1 into a photovoltage and transmits it to the signal accumulation module 40. At this time, the signal accumulation module 40 sums the photovoltages output by all transimpedance amplifiers 31 and then filters and outputs them.

[0046] It should be noted that the lens module 10 can be Figure 1 The receiving lens shown Figure 1 The dashed arrows shown represent the optical signals of the reflected echo light. Figure 1 The solid arrows shown represent the photovoltage (i.e., electrical signal) after summation and filtering.

[0047] In summary, the photoelectric detection module of this utility model integrates a lens module 10, a photoelectric detection module 20, a transimpedance amplification module 30, and a signal accumulation module 40. While reducing the detection bandwidth, it achieves the goals of improving the detection efficiency of reflected echo light and reducing the product size. Specifically, the photoelectric detection module 20 is equipped with multiple photodetectors D1. The small detection surfaces of all photodetectors D1 are combined into a large detection surface through a planar mounting method, which effectively shortens the distance between the lens module 10 and the large detection surface, thereby reducing the product size. Furthermore, since the large detection surface is composed of multiple small detection surfaces mounted in a planar manner, the light power per unit area of ​​each small detection surface can be effectively reduced, avoiding the phenomenon that the light intensity of the reflected echo light projected by the lens module 10 damages the detection surface. In addition, since the photoelectric detection module 20 itself is composed of multiple small detection surface photodetectors D1, the phenomenon that a single large detection surface photodetector D1 has a large junction capacitance and therefore a low detection bandwidth can be effectively avoided. Next, the transimpedance amplification module 30 and the signal accumulation module 40 are used to collect and output the electrical signals of all reflected echo light, ultimately achieving the advantages of reducing size, increasing light loss threshold and detection signal bandwidth without reducing photoelectric signal gain.

[0048] Furthermore, in some feasible embodiments, the photoelectric detection module 20 includes multiple photoelectric detectors D1, and the small detection surfaces of each photoelectric detector D1 are combined into a large detection surface through a planar paving method.

[0049] In this embodiment, the photodetector D1 provided in this application includes at least two photodetectors D1. For example, refer to... Figure 2 , Figure 2 This is a schematic diagram of the planar installation of the photodetector D1 according to an embodiment of the present invention. Figure 2 The number 11 shown can be understood as photodetector D1 set in the first row and first column. Figure 2 The number 12 shown can be understood as photodetector D1 set in the first row and second column; Figure 2 The 1m shown can be understood as the photodetector D1 set in the first row and the mth column; Figure 2 The number 21 shown can be understood as photodetector D1 set in the second row and first column; Figure 2 The n1 shown can be understood as the photodetector D1 set in the nth row and the first column; Figure 2 The nm shown can be understood as the photodetector D1 set in the nth row and mth column.

[0050] Furthermore, in some other feasible embodiments, the transimpedance amplification module 30 includes a plurality of transimpedance amplifiers 31, the number of amplifiers of the transimpedance amplifiers 31 being the same as the number of detectors of the photodetector D1, and each of the transimpedance amplifiers 31 being electrically connected to the corresponding photodetector D1.

[0051] Furthermore, in some feasible embodiments, reference is made to Figure 3 , Figure 3 This is a circuit diagram of the transimpedance amplifier 31 according to an embodiment of the present invention. The transimpedance amplifier 31 includes a first operational amplifier U1, a first resistor R1, a second resistor R2, and a first capacitor C1; the non-inverting input terminal of the first operational amplifier U1 is grounded, the inverting input terminal of the first operational amplifier U1 is electrically connected to the anode of the corresponding photodetector D1, and the output terminal of the first operational amplifier U1 is electrically connected to the input terminal of the signal accumulation module 40 through the second resistor R2; the positive power supply terminal of the first operational amplifier U1 is connected to the cathode of the corresponding photodetector D1 and then connected to a positive power supply voltage, and the negative power supply terminal of the first operational amplifier U1 is connected to a negative power supply voltage; the first resistor R1 and the first capacitor C1 are connected in parallel to form a feedback transimpedance, the first end of the first resistor R1 is electrically connected to the connection node of the first end of the first capacitor C1 and is electrically connected to the anode of the detector, and the second end of the first resistor R1 is electrically connected to the connection node of the second end of the first capacitor C1 and is electrically connected to the output terminal of the first operational amplifier U1.

[0052] In this embodiment, refer to Figure 3 The first operational amplifier U1 provided in this application can be a high-speed operational amplifier chip OPA855. The high-speed operational amplifier chip OPA855 features a high gain-bandwidth product and low input parasitic capacitance. The OPA855 has a gain-bandwidth product as high as 8 GHz and an input parasitic capacitance as low as 0.6 pF. Furthermore, Figure 3 The first resistor R1 and the first capacitor C1 shown constitute a feedback transresistance, and... Figure 3 The high-speed operational amplifier chip OPA855 shown forms a transimpedance amplifier 31.

[0053] It should be noted that, Figure 3 D1 shown represents photodetector D1, which can be a photodiode.

[0054] In a specific embodiment, refer to Figure 4 , Figure 4This is a schematic diagram of the photoelectric detection module circuit involved in an embodiment of the present utility model. Each small detection surface photodetector D1 is equipped with a transimpedance amplifier 31. For example, photodetector D1-1 is equipped with transimpedance amplifier 31-1, and photodetector D1-n is equipped with transimpedance amplifier 31-n.

[0055] Additionally, it should be noted that, Figure 4 The first resistors R1-1 to R1-n and the first capacitors C1-1 to C1-n form n feedback cross-resistances.

[0056] Furthermore, in some other feasible embodiments, reference is made to... Figure 4 The signal accumulation module 40 includes a second operational amplifier U2, a feedback impedance unit 41, an addition matching unit 42, and a low-pass filter unit 43. The inverting input terminal of the second operational amplifier U2 constitutes the input terminal of the signal accumulation module 40, and is electrically connected to the output terminal of the first operational amplifier U1 through the second resistor R2. The non-inverting input terminal of the second operational amplifier U2 is grounded through the addition matching unit 42. The positive power supply terminal of the second operational amplifier U2 is connected to the positive power supply voltage, and the negative power supply terminal of the second operational amplifier U2 is connected to the negative power supply voltage. The output terminal of the second operational amplifier U2 is electrically connected to the first terminal of the feedback impedance unit 41 and the low-pass filter unit 43, respectively, and the second terminal of the feedback impedance unit 41 is electrically connected to the inverting input terminal of the second operational amplifier U2.

[0057] In this embodiment, the second operational amplifier U2 can be an operational amplifier of model OPA698.

[0058] Furthermore, in some feasible embodiments, reference is made to Figure 4 The feedback impedance unit 41 includes a third resistor R3 and a second capacitor C2. The third resistor R3 is connected in parallel with the second capacitor C2 to form a feedback impedance. The first end of the third resistor R3 is electrically connected to the connection node of the first end of the second capacitor C2, forming the first end of the feedback impedance unit 41, which is electrically connected to the output terminal of the second operational amplifier U2. The second end of the third resistor R3 is electrically connected to the connection node of the second end of the second capacitor C2, forming the second end of the feedback impedance unit 41, which is electrically connected to the inverting input terminal of the second operational amplifier U2.

[0059] Furthermore, in some other feasible embodiments, reference is made to... Figure 4The low-pass filter unit 43 includes a third capacitor C3, a fourth capacitor C4, and a fourth resistor R4; the first end of the fourth resistor R4 is electrically connected to the first end of the third capacitor C3 and the output end of the second operational amplifier U2, respectively, and the second end of the fourth resistor R4 is electrically connected to the first end of the fourth capacitor C4; the second ends of the third capacitor C3 and the second ends of the fourth capacitor C4 are grounded.

[0060] In this embodiment, the third capacitor C3, the fourth capacitor C4, and the fourth resistor R4 constitute a low-pass filter circuit, which filters the summed electrical signal output from the second operational amplifier U2 before outputting it. Figure 4 The DC-to-current conversion gain of the circuit shown is:

[0061]

[0062] Where I1 represents the photocurrent of the first small-scale photodetector D1, I2 represents the photocurrent of the second small-scale photodetector D1, and I... n R represents the photocurrent of the nth small-scale photodetector D1; f1 This represents the resistance value of the first resistor R1-1, R f R represents the resistance value of the third resistor R3, and R1 represents the resistance value of the matching resistor R1-1, which is the same as the resistance value of the first resistor R1-1; R f2 R1 represents the resistance value of the first resistor R1-2, and R2 represents the resistance value of the matching resistor when the resistance value of the first resistor R1-2 is equal to that of the matching resistor. fn This represents the resistance value of the first resistor R1-n, R n The resistance value of the addition matching resistor is the resistance value of the first resistor R1-n; K represents the DC-DC conversion gain.

[0063] Furthermore, in some feasible embodiments, reference is made to Figure 4 The addition matching unit 42 is the fifth resistor R5.

[0064] In this embodiment, the fifth resistor R5 can be an additive matching resistor, the resistance of which is usually set to be equal to the resistance of each of the first resistors R1, to ensure the correct summation of the signals.

[0065] In summary, the photoelectric detection module of this utility model integrates a lens module 10, a photoelectric detection module 20, a transimpedance amplification module 30, and a signal accumulation module 40. While reducing the detection bandwidth, it achieves the goals of improving the detection efficiency of reflected echo light and reducing the product size. Specifically, the photoelectric detection module 20 is equipped with multiple photodetectors D1. The small detection surfaces of all photodetectors D1 are combined into a large detection surface through a planar mounting method, which effectively shortens the distance between the lens module 10 and the large detection surface, thereby reducing the product size. Furthermore, since the large detection surface is composed of multiple small detection surfaces mounted in a planar manner, the light power per unit area of ​​each small detection surface can be effectively reduced, avoiding the phenomenon that the light intensity of the reflected echo light projected by the lens module 10 damages the detection surface. In addition, since the photoelectric detection module 20 itself is composed of multiple small detection surface photodetectors D1, the phenomenon that a single large detection surface photodetector D1 has a large junction capacitance and therefore a low detection bandwidth can be effectively avoided. Next, the transimpedance amplification module 30 and the signal accumulation module 40 are used to collect and output the electrical signals of all reflected echo light, ultimately achieving the advantages of reducing size, increasing light loss threshold and detection signal bandwidth without reducing photoelectric signal gain.

[0066] This utility model also proposes a photoelectric detection device, referring to... Figure 5 , Figure 5 This is a block diagram of the photoelectric detection device according to an embodiment of the present utility model. The photoelectric detection device includes at least the above-described photoelectric detection module. The specific structure of the photoelectric detection module is as described in the above embodiments. Since the photoelectric detection device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0067] This utility model also proposes a laser ranging system, which includes at least the above-mentioned photoelectric detection device. The specific structure of the laser ranging system is as described in the above embodiments. Since the laser ranging system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0068] The above description is merely an exemplary embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related laser ranging technologies, are included within the patent protection scope of this utility model.

Claims

1. A photoelectric detection module, characterized in that, The photoelectric detection module includes a lens module, a photoelectric detection module, a transimpedance amplifier module, and a signal accumulation module; The lens module is positioned facing the photoelectric detection module, and the photoelectric detection module, the transimpedance amplification module, and the signal accumulation module are electrically connected in sequence.

2. The photoelectric detection module as described in claim 1, characterized in that, The photoelectric detection module includes multiple photoelectric detectors, and the small detection surfaces of each photoelectric detector are combined into a large detection surface through a planar paving method.

3. The photoelectric detection module as described in claim 2, characterized in that, The transimpedance amplification module includes multiple transimpedance amplifiers, the number of which is the same as the number of detectors in the photodetector, and each transimpedance amplifier is electrically connected to the corresponding photodetector.

4. The photoelectric detection module as described in claim 3, characterized in that, The transimpedance amplifier includes a first operational amplifier, a first resistor, a second resistor, and a first capacitor; The non-inverting input of the first operational amplifier is grounded, the inverting input of the first operational amplifier is electrically connected to the detector anode of the corresponding photodetector, and the output of the first operational amplifier is electrically connected to the input of the signal accumulation module through the second resistor. The positive power supply terminal of the first operational amplifier is connected to the detector cathode of the corresponding photodetector and then connected to a positive power supply voltage, while the negative power supply terminal of the first operational amplifier is connected to a negative power supply voltage. The first resistor and the first capacitor are connected in parallel to form a feedback transimpedance. The first end of the first resistor is electrically connected to the connection node of the first end of the first capacitor and is electrically connected to the anode of the detector. The second end of the first resistor is electrically connected to the connection node of the second end of the first capacitor and is electrically connected to the output terminal of the first operational amplifier.

5. The photoelectric detection module as described in claim 4, characterized in that, The signal accumulation module includes a second operational amplifier, a feedback impedance unit, an addition matching unit, and a low-pass filter unit; The inverting input terminal of the second operational amplifier constitutes the input terminal of the signal accumulation module, and is electrically connected to the output terminal of the first operational amplifier through the second resistor; The non-inverting input of the second operational amplifier is grounded via the addition matching unit, the positive power supply terminal of the second operational amplifier is connected to the positive power supply voltage, and the negative power supply terminal of the second operational amplifier is connected to the negative power supply voltage. The output terminal of the second operational amplifier is electrically connected to the first terminal of the feedback impedance unit and the low-pass filter unit, respectively, and the second terminal of the feedback impedance unit is electrically connected to the inverting input terminal of the second operational amplifier.

6. The photoelectric detection module as described in claim 5, characterized in that, The feedback impedance unit includes a third resistor and a second capacitor, and the third resistor is connected in parallel with the second capacitor to form a feedback impedance. The first end of the third resistor is electrically connected to the connection point of the first end of the second capacitor, forming the first end of the feedback impedance unit, which is electrically connected to the output end of the second operational amplifier. The second end of the third resistor is electrically connected to the connection point of the second end of the second capacitor, forming the second end of the feedback impedance unit, which is electrically connected to the inverting input of the second operational amplifier.

7. The photoelectric detection module as described in claim 5, characterized in that, The low-pass filter unit includes a third capacitor, a fourth capacitor, and a fourth resistor; The first end of the fourth resistor is electrically connected to the first end of the third capacitor and the output end of the second operational amplifier, respectively; the second end of the fourth resistor is electrically connected to the first end of the fourth capacitor. The second terminal of the third capacitor and the second terminal of the fourth capacitor are respectively grounded.

8. The photoelectric detection module as described in claim 5, characterized in that, The addition matching unit is the fifth resistor.

9. A photoelectric detection device, characterized in that, The photoelectric detection device includes at least the photoelectric detection module as described in any one of claims 1 to 8.

10. A laser ranging system, characterized in that, The laser ranging system includes at least the photoelectric detection device as described in claim 9.

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