Device, apparatus and method for reading signals of current type sensor

Abstract

The present invention provides a device, an electronic device and a signal reading method for reading the signal of a current sensor. The device includes an array of current sensors, a shunt circuit, a summing circuit and a processor; wherein the shunt circuit corresponds to the current sensors in the array one by one, and the input end of the shunt circuit is connected to the corresponding current sensor; the summing circuit corresponds to the shunt circuits of different groups of current sensors of different dimensions in the array, respectively, and the output end of the shunt circuit is connected to the input end of the corresponding summing circuit, and the summing circuit is used to sum the shunt signals from the connected shunt circuits to generate a summed signal; the output ends of the summing circuits are connected to the processor, and the processor is used to determine the position of the current sensor that detects the physical signal in the array according to the summed signal. As a result, the production cost and power consumption of the device for reading the signal of the current sensor can be greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of circuits, and in particular to a device for reading a signal of a current type sensor, an electronic device, and a signal reading method based on the device. Background Art

[0002] A current sensor is a sensor that converts a physical signal into a current signal. For example, it may include a photomultiplier tube, a photodiode, an avalanche photodiode, a silicon-based photomultiplier tube, a semiconductor detector, etc. The current sensor can be used to detect physical signals such as temperature, humidity, light signals, etc. of the surrounding environment, and convert the physical signal into a current signal and transmit it to the processor, thereby realizing the detection of the surrounding environment. However, in many current instruments and equipment, the signals of each current sensor are read independently, that is, each current sensor is respectively provided with a set of independent reading circuits. Although this method can accurately detect external physical signals, as the sensor dimension increases, the number of corresponding reading circuits increases exponentially, resulting in a substantial increase in equipment cost and power consumption.

[0003] Therefore, it is necessary to provide a device for reading the signal of an electric current type sensor to at least partially solve the above problems existing in the prior art. Summary of the invention

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, there is provided a device for reading the signal of a current sensor, comprising an array of current sensors, a shunt circuit, a summing circuit and a processor; wherein the shunt circuit corresponds one-to-one to the current sensors in the array, the input end of the shunt circuit is connected to the corresponding current sensor, and the shunt circuit is used to shunt the current signal output by the connected current sensor after converting the physical signal to obtain N shunt signals, wherein N is equal to the number of dimensions of the array; the summing circuit corresponds to the shunt circuits of different groups of current sensors of different dimensions connected in the array, the output end of the shunt circuit is connected to the input end of the corresponding summing circuit, and the summing circuit is used to sum the shunt signals from the connected shunt circuits to generate a summed signal; the output ends of the summing circuit are all connected to the processor, and the processor is used to determine the position of the current sensor that detects the physical signal in the array according to the summed signal.

[0005] Exemplarily, the array includes at least a first dimension and a second dimension, the current type sensors in the first dimension include M1 rows of current type sensors, the current type sensors in the second dimension include M2 ​​columns of current type sensors, within the first dimension, the current type sensors in each row of the array are a group, and within the second dimension, the current type sensors in each column of the array are a group.

[0006] Exemplarily, the array further includes at least a third dimension, within which the current-type sensors in the array that are in the same row and the same column are grouped together.

[0007] Exemplarily, the array further includes a fourth dimension, in which the current type sensors in the array that are in the same row and the same column and in the same group in the third dimension are grouped together.

[0008] Exemplarily, the processor determines the position of the current type sensor acted upon by the physical signal in the array based on the summed signal, including performing the following operations: for each dimension of the array, calculating the center of gravity of the summed signals from different summing circuits related to the dimension, wherein the summing circuit related to the dimension is a summing circuit that connects different groups of current type sensors in the array in that dimension via a shunt circuit; and determining the position of the current type sensor acted upon by the physical signal in the dimension based on the center of gravity.

[0009] Exemplarily, the processor calculates the center of gravity of the summed signals from different summing circuits associated with the dimension in the following manner: a weighted average of the summed signals from different summing circuits associated with the dimension is calculated to obtain the center of gravity, wherein the weight of the summed signal is positively correlated to the arrangement position of the current-type sensor to which the summing circuit from which it comes is connected via the shunt circuit within the group of the dimension in the array.

[0010] Exemplarily, the shunt circuit includes an active shunt circuit and / or a passive shunt circuit.

[0011] Exemplarily, the shunt circuit includes N shunt branches, and each shunt branch is provided with a resistor.

[0012] Exemplarily, the summing circuit includes a variable impedance circuit and / or a charge-to-digital conversion circuit.

[0013] According to another aspect of the present invention, an electronic device is provided, comprising the device for reading a signal of an amperometric sensor as described above.

[0014] Exemplarily, the electronic device is a positron emission imaging device, which further includes a crystal coupled to the array, and the physical signal is generated by the crystal detecting a gamma photon.

[0015] According to another aspect of the present invention, a signal reading method based on the above-mentioned device is also provided, comprising: using a shunt circuit to shunt the current signal output by the current type sensor to which it is connected to convert the physical signal to obtain N shunt signals; using a summing circuit to sum the shunt signals from the current circuit to which it is connected to generate a sum signal; and determining the position of the current type sensor that detects the physical signal in the array based on the sum signal.

[0016] According to the above technical solution, as the dimension of the array increases, the number of summing circuits increases in arithmetic progression. Thus, the signal of the multi-dimensional current sensor can be read by using a small number of reading circuits. This can greatly reduce the production cost and power consumption of the device for reading the signal of the current sensor.

[0017] A series of simplified concepts are introduced in the summary of the invention, which will be further described in detail in the detailed description. The summary of the invention does not mean to attempt to limit the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0018] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0020] Figure 1 A schematic block diagram of a device for reading a signal of an amperometric sensor according to an embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram showing the connection relationship between a current sensor and its corresponding shunt circuit according to an embodiment of the present invention is shown;

[0022] Figure 3 A schematic block diagram of a summing circuit receiving a shunt signal according to an embodiment of the present invention is shown;

[0023] Figure 4 A schematic diagram showing a three-dimensional current sensor array according to an embodiment of the present invention; and

[0024] Figure 5 A schematic flow chart of a signal reading method according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0025] In the following description, a large amount of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only relates to preferred embodiments of the present invention, and the present invention can be implemented without one or more of such details. In addition, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0026] According to one aspect of the present invention, a device for reading a signal of an amperometric sensor is provided. For the convenience of description and drawing, the following description is made by taking the array of amperometric sensors included in the device as a two-dimensional array. Figure 1 FIG. 1 is a schematic block diagram of an apparatus 100 for reading a signal of an amperometric sensor according to an embodiment of the present invention. The apparatus 100 may include: Figure 1 The array of current type sensors, the current dividing circuit 120, the summing circuit 130 and the processor 140 are shown. The array includes a plurality of current type sensors 111.

[0027] The shunt circuits 120 correspond one-to-one to the current sensors 111 in the array. The current sensor 111 is used to convert a physical signal into a current signal and output the current signal. For each shunt circuit 120, it has a current sensor 111 that uniquely corresponds to it. The input end of the shunt circuit 120 is connected to the corresponding current sensor 111, and the shunt circuit 120 is used to shunt the current signal output by the connected current sensor 111 by converting the physical signal to obtain N shunt signals. Wherein N is equal to the number of dimensions of the array. Optionally, N is an integer greater than 1. Figure 1 The dimension of the array in the device 100 shown is 2, so N=2. The current sensor 111 can input the current signal into the shunt circuit 120 . Figure 2 FIG. 1 is a schematic diagram showing the connection relationship between the current sensor 111 and the corresponding shunt circuit 120 according to an embodiment of the present invention. Figure 2 As shown, the shunt circuit 120 can shunt the received current signal according to a certain ratio to obtain N shunt signals. Each shunt signal corresponds to a dimension of the array of the current sensor. Optionally, the shunt ratio can be any desired ratio. For example, the current signal can be equally divided, so that the current values ​​of the N shunt signals obtained are all equal.

[0028] The summing circuits 130 correspond to the shunt circuits 120 that connect different groups of current type sensors 111 in different dimensions in the array. For each dimension, the current type sensors 111 that are adjacent in position can be regarded as the same group. Figure 1 Taking the device 100 as an example, from the vertical direction, each row of current sensors 111 can be considered as a group; from the left and right direction, each column of current sensors 111 can be considered as a group. For the shunt circuit 120 of each group of current sensors 111, there is a unique summing circuit for summing a group of signals shunted by the shunt circuit 120 of the group. Figure 3 FIG. 1 is a schematic block diagram showing a summing circuit 130 receiving a shunt signal according to an embodiment of the present invention. Figure 3 In the embodiment shown, the array of current type sensors in the device includes N dimensions, wherein from dimension 1 to the last dimension N, each dimension includes M1, M2...M N As mentioned above, each current sensor 111 is connected to a shunt circuit 120, so in this embodiment, it includes M1*M2*…*M N The output end of the shunt circuit 120 is connected to the input end of the corresponding summing circuit 130. The summing circuit 130 is used to sum the shunt signals from the connected shunt circuits 120 to generate a summed signal. As described above, each shunt circuit 120 can shunt the received current signal to obtain N shunt signals. For each summing circuit 130, it is connected to a group of shunt circuits 120 in one dimension. Figure 3 As shown, for the dimension 1 of the array, there are M1 current sensor groups, and thus there are M1 shunt circuit groups. Each of the M1 current sensor groups includes M2*…*M N Current sensors 111, correspondingly, each of the M1 shunt circuit groups also includes M2*…*M N There are M1 shunt circuits 120. Since there are M1 shunt circuit groups, there are M1 summing circuits 130. Each of the M1 summing circuits 130 is connected to a group of shunt circuits 120, that is, it receives M2*…*M N The above describes in detail the dimension 1 of the array. The situation is similar for other dimensions of the array. For example, for the dimension 2, dimension 3, ... dimension N of the array, there are M2, M3, ... M N A summing circuit 130. For the sake of brevity, these other dimensions will not be described in more detail here. Figure 3 In the embodiment shown, there are M1+M2+…+M N A summing circuit 130 is provided.

[0029] The output end of each summing circuit 130 is connected to the processor 140. The processor 140 is used to determine the position of the current sensor 111 that detects the physical signal in the array according to the sum signal. Based on the working principle of the current sensor 111, it can be understood that for the same physical signal, due to the inherent properties of the physical signal and the different distances from each current sensor 111, the size of the current signal detected and converted by each current sensor 111 may be different. Further, the current signal is shunted to obtain N shunt signals corresponding to N dimensions. For any dimension, since the position of the current sensor 111 of each group is adjacent under the dimension, the position of the current sensor 111 in the dimension in the array that detects the physical signal can be determined according to the sum signal of the shunt signals of each group of current sensors 111. If one or more current sensors 111 detect a physical signal, the signal value of the sum signal of the group where the current sensor 111 is located will be relatively large, otherwise, the signal value of the sum signal of the group where the current sensor 111 that does not detect the physical signal will be relatively small. By respectively determining the position of each dimension of the current type sensor 111 that detects the physical signal through the summed signals of different dimensions, its position in the entire array can be determined.

[0030] Still Figure 1 Taking the device 100 as an example, for the up and down directions, each row of current sensors 111 is a group. By calculating the sum of the shunt signals of the current sensors 111 in each row, the information of the row where the current sensor 111 that detected the physical signal is located can be determined based on these different signal sum values. Similarly, the information of the column where the current sensor 111 that detected the physical signal is located can be determined. In this way, the specific position of the current sensor 111 in the entire array can be determined.

[0031] According to the above technical solution, as the dimension of the array increases, the number of summing circuits 130 increases in arithmetic progression. Thus, the signal of the multi-dimensional current sensor 111 can be read by using a small number of reading circuits. Thus, a large number of current signals of the current sensor 111 can be read out by a small number of reading circuits. Thus, the solution can significantly reduce the production cost and power consumption of the device for reading the signal of the current sensor.

[0032] Exemplarily, the array includes at least a first dimension and a second dimension. The current sensors of the first dimension include M1 rows of current sensors 111, and the current sensors of the second dimension include M2 ​​columns of current sensors 111. In the first dimension, each row of current sensors 111 in the array is a group. In the second dimension, each column of current sensors 111 in the array is a group. See again Figure 1 ,exist Figure 1In the illustrated embodiment, the first dimension is the up-down direction of the array, corresponding to each "row"; the second dimension is the left-right direction of the array, corresponding to each "column". For different dimensions of the array, each row or column is called a group. Figure 1 It is not difficult to see that the array is a two-dimensional array of M1*M2. Therefore, for the up-down direction of the array, there are M1 corresponding summing circuits 130 for summing the shunt signals output by the shunt circuits 120 in the same row. Similarly, for the left-right direction of the array, there are M2 corresponding summing circuits 130 for summing the shunt signals output by the shunt circuits 120 in the same column.

[0033] Thus, the shunt signals generated by the multidimensional sensor array can be summed by row and column, respectively, to achieve the sub-dimensional reading of the signal of the current sensor 111. Thus, the position of the current sensor 111 that detects the physical signal in the array can be determined more accurately.

[0034] Exemplarily, the array may further include at least a third dimension. In the third dimension, the current type sensors 111 in the same row and the same column in the array are grouped together. Figure 4 FIG. 4 is a schematic diagram showing a three-dimensional current sensor array according to an embodiment of the present invention. Figure 4 As shown, the current type sensor of the third dimension includes an M3 layer current type sensor 111. For ease of description, the following can be established: Figure 4 The spatial rectangular coordinate system shown. Thus, all current sensors 111 in the array have unique coordinate values. Furthermore, the current sensors 111 with the same x-coordinate and y-coordinate but different z-coordinates can be grouped together. According to the above technical solution, a third dimension can be added on the basis of the first dimension and the second dimension.

[0035] In the above technical solution, in the third dimension, the current sensors 111 in the same row and column are grouped together to ensure that the accuracy and efficiency of the signal read by the device 100 are not affected by the change in dimension when the dimension of the sensor array increases.

[0036] Exemplarily, the array may further include a fourth dimension. In the fourth dimension, the current sensors in the array that are in the same row and column and in the same group in the third dimension are grouped together. Optionally, the array 100 may include a plurality of Figure 4 In the fourth dimension, the current sensors with the same x-coordinate, y-coordinate and z-coordinate in the above embodiment can be first determined, and then the current sensors with the same position in each subarray can be grouped together. Alternatively, the fourth dimension can also be time, and in the array, the current sensors with the same signal reading time in the same row, the same column and the same group in the third dimension can be grouped together.

[0037] In this way, accurate reading of signals from high-dimensional sensors and precise positioning of their positions can be achieved.

[0038] It can be understood that the above scheme is only described as an example of an array of current-type sensors being a two-dimensional, three-dimensional or four-dimensional array, and does not mean a limitation on the dimension of the sensor array. According to the above technical scheme, the dimension of the sensor array can be expanded to more dimensions, thereby realizing the reading of the signals of the current-type sensors in the more-dimensional current-type sensor array and the accurate positioning of the current-type sensors.

[0039] Exemplarily, the shunt circuit 120 may include an active shunt circuit and / or a passive shunt circuit. Specifically, a passive shunt circuit may refer to a shunt circuit that is directly combined using passive components such as resistors, capacitors, diodes, inductors, and transformers. An active shunt circuit may refer to a shunt circuit composed of passive components and amplifiers. The specific circuit structure of the shunt circuit is not limited in the present application, and any existing or future shunt circuit that can realize the shunt function is within the protection scope of the present application.

[0040] The arrangement of the shunt circuit 120 realizes the shunting of the current signal, and provides a basis for the subsequent dimensional reading of the signal of the current sensor 111. In addition, the shunt circuit has a simple structure and the required components are of low cost.

[0041] Exemplarily, the shunt circuit may include N shunt branches, each of which is provided with a resistor. The resistance value of the resistor may be reasonably set based on experience, and is not limited here.

[0042] Therefore, the resistor on each shunt branch can play a role in voltage division to ensure that the subsequent circuit can operate safely and stably.

[0043] Exemplarily, the summing circuit 130 may include a variable impedance circuit and / or a charge digital conversion circuit. Optionally, the summing circuit 130 may also include an analog-to-digital converter. The specific circuit structure of the summing circuit is not limited in the present application, and any existing or future summing circuit that can achieve summing of the shunt signal is within the protection scope of the present application.

[0044] Therefore, using the above circuit to sum the shunt signals can ensure the accuracy of the summed signal, which makes it easier to accurately position the subsequent sensors.

[0045] Exemplarily, the processor 140 may determine the position of the current sensor 111 in the array to which the physical signal acts according to the sum signal, by performing the following operations:

[0046] For each dimension of the array, the centroid of the summed signals from different summing circuits 130 associated with the dimension is calculated, wherein the summing circuits 130 associated with the dimension are summing circuits 130 that connect different groups of current sensors 111 in the array via shunt circuits 120 .

[0047] The array is Figure 1 The following description is made taking the two-dimensional array shown in FIG. 1 as an example. Specifically, the current sensor 111 can detect a physical signal and generate a current signal. The current signal can be split by the split circuit 120 to obtain two split signals, including a column split signal and a row split signal. For the "row" dimension of the array, the center of gravity of the sum of the row split signals generated by the current sensors in different rows is calculated. That is, the calculation from Figure 1 The centroid of the summed signal of the summing circuit 130 is shown on the right side of the array. For the "column" dimension of the array, the centroid of the summed signal of the column shunt signals generated by the current sensors in different columns is calculated. That is, the centroid of the summed signal from Figure 1 The center of gravity of the sum signal of the summing circuit 130 is shown on the upper side. The center of gravity of the sum signal can indicate where the corresponding shunt signal has a maximum value in each dimension. Then, according to the center of gravity, the position of the current sensor 111 acted by the physical signal in the dimension can be determined.

[0048] Thus, by calculating the center of gravity of the summed signal in each dimension, the position of the current sensor 111 acted upon by the physical signal in each dimension can be determined, and finally the position of the current sensor 111 that detects the physical signal in the array can be determined. This solution can not only ensure the accuracy of the determination result, but also is simple and easy to implement.

[0049] Exemplarily, the processor 140 may calculate the centroid of the summed signals from different summing circuits 130 related to the dimension in the following manner: calculate the weighted average of the summed signals from different summing circuits 130 related to the dimension to obtain the centroid. The weight of the summed signal is positively correlated with the arrangement position of the current sensor 111 connected to the summing circuit 130 via the shunt circuit 120 in the group of the dimension in the array. For example, the summed signal of the same dimension is represented in the form of a spectrum diagram. Still in the form of Figure 1 Taking the device 100 as an example, the horizontal axis of the spectrum diagram can represent the weight of the summed signal, that is, the arrangement position of the corresponding current sensor 111 in the group of the "row" dimension or the "column" dimension of the array. Taking the "column" dimension as an example, it can be understood that in this dimension, the later the arrangement position (according to Figure 1 The larger the x coordinate value is, the greater the weight of the sum signal of the components of the current signal output by the current sensor 111. Figure 1In the device 100 shown, the weight of the summed signal obtained by the summing circuit 130 in the upper right corner is the largest; the weight of the summed signal obtained by the summing circuit 130 in the upper left corner is the smallest, which is equal to the current type sensors 111 in the rightmost column and the current type sensors 111 in the leftmost column. Figure 1 The value of the horizontal axis in the rectangular coordinate system. The vertical axis of the spectrum diagram can represent the current value of the summed signal, that is, the energy value. For the summed signals of the same dimension, the current value of each summed signal can be multiplied by the corresponding weight and all the products can be summed. Then, the summed result can be divided by the sum of the current values ​​of all the summed signals in the same dimension to obtain the weighted average of the summed signals of the same dimension. The weighted average represents the center of gravity of the summed signal.

[0050] The above scheme has small computational complexity and simple algorithm.

[0051] According to another aspect of the present invention, an electronic device is provided, which includes the above-mentioned device for reading a signal of an amperometric sensor.

[0052] Exemplarily, the electronic device may be a positron emission tomography (PET) device. The positron emission tomography device may also include a crystal coupled to the array. The physical signal is generated by the detection of a gamma photon by the crystal. See again Figure 4 , wherein the electronic device includes an array 410 of current-type sensors and a crystal 420 coupled to the array 410. According to the above scheme, when a gamma photon is detected by a certain crystal, a corresponding physical signal can be generated, and the physical signal can be detected by the sensor in the array 410 and generate a corresponding current signal, and the current signal can be shunted by the shunt circuit to obtain a shunt signal. By calculating the center of gravity of the summed signal from M1 summing circuits for each row, the row position where the gamma photon acts in the crystal can be determined. By calculating the center of gravity of the summed signal from M2 summing circuits for each column, the column position where the gamma photon acts in the crystal can be determined. By calculating the center of gravity of the summed signal from M3 summing circuits for each layer, the layer position where the gamma photon acts in the crystal can be determined. In this way, the position where the gamma photon acts in the crystal can be determined.

[0053] According to yet another aspect of the present invention, a signal reading method based on the above-mentioned device for reading a signal of a current type sensor is provided. Figure 5 FIG. 2 shows a schematic flow chart of a signal reading method according to an embodiment of the present invention. Figure 5 As shown, the method includes:

[0054] Step S510, using a shunt circuit to shunt the current signal output by converting the physical signal of the current type sensor connected thereto, so as to obtain N shunt signals.

[0055] Step S520: using a summing circuit to sum the shunt signals from the current circuit connected thereto to generate a sum signal.

[0056] Step 530: Determine the position of the current sensor that detects the physical signal in the array according to the sum signal.

[0057] A person skilled in the art can understand the specific implementation scheme of the electronic device and the signal reading method and its beneficial effects by reading the above description of the device for reading the signal of the current type sensor, which will not be described here for the sake of brevity.

[0058] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for reading a signal of an amperometric sensor, comprising an array of amperometric sensors, a current shunting circuit, a summing circuit and a processor; wherein: The shunt circuit corresponds to the current type sensor in the array one by one, the input end of the shunt circuit is connected to the corresponding current type sensor, and the shunt circuit is used to shunt the current signal output by the connected current type sensor after converting the physical signal to obtain N shunt signals, where N is equal to the number of dimensions of the array; The summing circuits respectively correspond to shunt circuits connected to different groups of current type sensors of different dimensions in the array, the output ends of the shunt circuits are connected to the input ends of the corresponding summing circuits, and the summing circuits are respectively used to sum the shunt signals from the connected shunt circuits to generate a summed signal; The output ends of the summing circuit are connected to the processor, and the processor is used to determine the position of the current sensor that detects the physical signal in the array according to the sum signal. The array includes at least a first dimension and a second dimension, the current type sensors in the first dimension include M1 rows of current type sensors, the current type sensors in the second dimension include M2 ​​columns of current type sensors, within the first dimension, each row of the current type sensors in the array is a group, and within the second dimension, each column of the current type sensors in the array is a group, The processor determines the position of the current sensor in the array to which the physical signal acts according to the sum signal, including performing the following operations: For each dimension of the array, calculating the centroid of the summed signals from different summing circuits associated with the dimension, wherein the summing circuits associated with the dimension are summing circuits connecting different groups of current-type sensors in the array in the dimension via shunt circuits; According to the center of gravity, the position of the current sensor acted by the physical signal in the dimension is determined.

2. The device according to claim 1, characterized in that The array further comprises at least a third dimension, within which the current type sensors in the array that are in the same row and the same column form a group.

3. The device according to claim 2, characterized in that The array further includes a fourth dimension. In the fourth dimension, the current type sensors in the array that are in the same row and the same column and in the same group in the third dimension are grouped together.

4. The device according to claim 1, characterized in that The processor calculates the centroid of the summed signals from the different summing circuits associated with the dimension by: The weighted average of the summed signals from different summing circuits related to the dimension is calculated to obtain the center of gravity, wherein the weight of the summed signal is positively correlated to the arrangement position of the current type sensor connected to the summing circuit via the shunt circuit within the group of the dimension in the array.

5. The device according to any one of claims 1 to 3, characterized in that: The shunt circuit includes an active shunt circuit and / or a passive shunt circuit.

6. The device according to claim 5, characterized in that The shunt circuit includes N shunt branches, and each shunt branch is provided with a resistor.

7. The device according to any one of claims 1 to 3, characterized in that: The summing circuit includes a variable impedance circuit and / or a charge-to-digital conversion circuit.

8. An electronic device comprising the device for reading a signal of an amperometric sensor according to any one of claims 1 to 7.

9. The electronic device according to claim 8, characterized in that: The electronic device is a positron emission imaging device, which further includes a crystal coupled to the array, and the physical signal is generated by the crystal detecting a gamma photon.

10. A signal reading method based on the device according to any one of claims 1 to 7, comprising: The shunt circuit is used to shunt the current signal output by the current sensor connected thereto into a physical signal, so as to obtain N shunt signals; Using the summing circuit to sum the shunt signals from the current circuit connected thereto to generate a summed signal; as well as The position of the current sensor in the array that detects the physical signal is determined according to the sum signal.

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