Test circuit and test method for an electrocardiograph

Abstract

The application discloses a test circuit and a test method of an electrocardio device. The test circuit of the electrocardio device comprises a main controller circuit, a slave controller circuit, and a detection circuit. The main controller circuit is used for generating at least a first control signal according to test requirements. The slave controller circuit is in electrical connection with the main controller circuit and works under the control of the first control signal. The detection circuit is in electrical connection with the slave controller circuit and the electrocardio device respectively and is used for adjusting the circuit structure under the control of the slave controller circuit, so that the detection circuit converts a test signal into different branch signals after adjustment, and different performance parameters of the electrocardio device are tested by using the different branch signals. In this way, full-automatic test of the electrocardio device can be realized, the anti-interference capability is improved, and the accuracy and repeatability of performance test are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical electronic instruments, in particular to a test circuit and a test method of an electrocardiograph. BACKGROUND

[0002] For electrocardiograph monitoring and diagnosis devices, the internal noise size, common-mode rejection capability and polarization voltage resistance capability are important indicators for evaluating the performance of the electrocardiograph. The domestic and international standards related to electrocardiograph parameters have specific requirements for these three indicators, and the electrocardiograph needs to be detected according to the standards when it is registered at home and abroad. The standards define the test circuit of the test device for testing the three indicators.

[0003] The present application relates to the technical field of medical electronic instruments, in particular to a test circuit and a test method of an electrocardiograph. SUMMARY

[0004] The technical problem solved by the present application is to provide a test circuit and a test method of an electrocardiograph to realize full-automatic testing of the electrocardiograph and improve its anti-interference capability, thereby improving the accuracy and repeatability of its performance testing.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a test circuit of an electrocardiograph. The test circuit of the electrocardiograph comprises: a main controller circuit for generating at least a first control signal according to test requirements; a slave controller circuit in communication connection with the main controller circuit, the slave controller circuit working under the control of the first control signal; and a detection circuit electrically connected with the slave controller circuit and the electrocardiograph, for adjusting its circuit structure under the control of the slave controller circuit, so that the adjusted detection circuit converts the test signal into different branch signals to test different performance parameters of the electrocardiograph by using the different branch signals.

[0006] In a specific embodiment, the detection circuit comprises: a resistance-capacitance network connected with the test signal and electrically connected with the electrocardiograph, the resistance-capacitance network being composed of a plurality of resistance-capacitance circuits; and a resistance-capacitance network control circuit electrically connected with the resistance-capacitance circuits and the slave controller circuit, for selecting a single or multiple resistance-capacitance circuits from the resistance-capacitance network to form the detection circuit under the control of the slave controller circuit, so that the detection circuit outputs the branch signal corresponding to the test requirements.

[0007] In an embodiment, the RC control circuit includes a plurality of first switches, which are arranged one-to-one with the plurality of RC circuits, one end of the RC circuit is connected to the test signal, and the other end is electrically connected to the ECG device; a fixed end of the first switch is connected to one end of the RC circuit, and a selection end of the first switch is selectively electrically connected to the ECG device under the control of the slave controller circuit.

[0008] In an embodiment, the test of the ECG device includes a signal test, and the signal test includes a common-mode rejection test and a polarization voltage resistance test; the detection circuit further includes a polarization voltage generation circuit for generating a polarization voltage; and a polarization voltage control circuit, which is electrically connected to the RC network, the slave controller circuit, the polarization voltage generation circuit, and the ECG device, respectively, and selectively connects the polarization voltage generation circuit between the selected RC circuit and the ECG device under the control of the slave controller circuit to implement the common-mode rejection test or the polarization voltage resistance test of the ECG device.

[0009] In an embodiment, the polarization voltage control circuit includes a plurality of second switches, which are arranged one-to-one with the plurality of RC circuits, and two fixed ends of the second switch are electrically connected to the RC circuit and the polarization voltage generation circuit, respectively; and a selection end of the second switch is selectively electrically connected to the ECG device under the control of the slave controller circuit.

[0010] In an embodiment, the test circuit of the ECG device further includes a signal generation circuit, which is electrically connected to the master controller circuit and the RC network, respectively, and is used to obtain a signal parameter of the test signal from the master controller circuit and generate a test signal corresponding to the signal parameter.

[0011] In an embodiment, the master controller circuit further generates a second control signal according to the test requirement; and the test circuit of the ECG device further includes a mode switching circuit, which is electrically connected to the master controller circuit, the signal generation circuit, and the RC network, respectively, and is used to disconnect or connect the signal generation circuit and the RC network under the control of the second control signal to implement the noise test or the signal test of the ECG device, and the signal test includes the common-mode rejection test and the polarization voltage resistance test.

[0012] In an embodiment, the test requirement includes a first test requirement and a second test requirement; and the test circuit of the ECG device further includes a display circuit, which is electrically connected to the master controller circuit and is used to input the first test requirement; and a key circuit, which is electrically connected to the master controller circuit and is used to input the second test requirement.

[0013] In an embodiment, the master controller circuit, the slave controller circuit, and the detection circuit are implemented through different and insulated circuit boards.

[0014] In an embodiment, the signal generation circuit is electrically isolated from the slave controller circuit and the detection circuit.

[0015] To solve the above technical problems, one technical solution adopted by the present application is to provide an electrocardio device testing method. The electrocardio device testing method is used for the above testing device, and the testing method comprises: a main controller circuit acquires testing requirements and generates at least a first control signal according to the testing requirements; a slave controller circuit works under the control of the first control signal; and a detection circuit adjusts the circuit structure of the detection circuit under the control of the slave controller circuit, so that the adjusted detection circuit converts the testing signal into different branch signals, so as to test different performance parameters of the electrocardio device by using the different branch signals.

[0016] In a specific embodiment, the testing requirements comprise signal testing and noise testing, and the detection circuit adjusts the circuit structure of the detection circuit under the control of the slave controller circuit, so that the adjusted detection circuit converts the testing signal into different branch signals, so as to test different performance parameters of the electrocardio device by using the different branch signals, comprising: in response to the testing requirements being noise testing, the main controller circuit controls the detection circuit not to input the testing signal, and the slave controller circuit adjusts the circuit structure of the detection circuit based on the standard requirements of the noise testing; and in response to the testing requirements being signal testing, the main controller circuit controls the detection circuit to input the testing signal, and the slave controller circuit adjusts the circuit structure of the detection circuit based on the standard requirements of the signal testing.

[0017] In a specific embodiment, the signal testing comprises common mode rejection testing and polarization voltage resistance testing, and the slave controller circuit adjusts the circuit structure of the detection circuit based on the standard requirements of the signal testing, comprising: the slave controller circuit controls a single or multiple resistance-capacitance circuits in the detection circuit to input the testing signal based on the standard requirements of the common mode rejection testing, so as to perform common mode rejection testing on the electrocardio device; and in response to the completion of the common mode rejection testing, the slave controller circuit controls the resistance-capacitance circuit in the detection circuit to input the testing signal to input a polarization voltage based on the standard requirements of the polarization voltage resistance testing, so as to perform polarization voltage resistance testing on the electrocardio device.

[0018] The beneficial effects of the embodiments of the present application are that the master controller circuit and the slave controller circuit connected by communication are adopted to realize the control of the performance parameter test of the electrocardio device, the noise interference of the detection circuit by part of the control circuit, i.e., the master controller circuit, can be effectively reduced, a cleaner test environment is obtained, the anti-interference performance is improved, the accuracy and repeatability of the test result are improved; and the test required by the standard is automatically controlled by the master controller circuit and the slave controller circuit, manual tedious operation is not required in the test process, the production efficiency of the production line can be improved, the training difficulty of the operator is reduced, the test circuit has high integration and high reliability, and the accuracy and repeatability of the test result can be effectively improved. Therefore, the full-automatic test of the electrocardio device can be realized, the anti-interference capability is improved, and the accuracy and repeatability of the performance test are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 is a circuit structure schematic diagram of a test circuit of an electrocardio device;

[0021] Figure 2 is a structure schematic diagram of an embodiment of a test circuit of an electrocardio device of the present application;

[0022] Figure 3 is a structure schematic diagram of an embodiment of a test circuit of an electrocardio device of the present application;

[0023] Figure 4 is a structure schematic diagram of an embodiment of a test circuit of an electrocardio device of the present application;

[0024] Figure 5 is a structure schematic diagram of an embodiment of a test circuit of an electrocardio device of the present application;

[0025] Figure 6 is a circuit structure schematic diagram of a slave controller circuit, a detection circuit and a mode switching circuit in the fifth embodiment;

[0026] Figure 7 is a structure schematic diagram of an embodiment of a test circuit of an electrocardio device of the present application;

[0027] Figure 8 is a circuit structure schematic diagram of a resistance-capacitance circuit and a resistance-capacitance network control circuit in the test circuit of the electrocardio device of the present application;

[0028] Figure 9is a circuit structure schematic diagram of a polarization control circuit and a polarization voltage generation circuit in a test circuit of an electrocardiograph of the present application;

[0029] Figure 10 is a circuit structure schematic diagram of a mode switching circuit in a test circuit of an electrocardiograph of the present application;

[0030] Figure 11 is a flow schematic diagram of an embodiment of a test method of an electrocardiograph of the present application;

[0031] Figure 12 is a flow schematic diagram of an embodiment of a test method of an electrocardiograph of the present application. DETAILED DESCRIPTION

[0032] The present application will be further described in conjunction with the accompanying drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustrating the present application, but not for limiting the scope of the present application. Similarly, the following embodiments are only part of the embodiments of the present application, but not all the embodiments of the present application, and all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] The domestic and international standards related to electrocardiographic parameters have put forward specific requirements for the three indexes of internal noise size, common-mode rejection capability and polarization voltage resistance capability of electrocardiographs, and the standards define test circuits for testing the three indexes, such as Figure 1 as shown: a test signal 50Hz, 20V (different test signals for different standards) is applied to a common node through a 100pF capacitor (C1-Cx), patient electrodes RA, LA, …, RL (electrically connected to the electrocardiograph) are connected to the common node through a 51kΩ resistor R and a 47nF capacitor C, and ±300mV polarization voltage is tested by being serially connected into the test circuit in a non-balance impedance manner. According to the standard requirements, the electrocardiographic noise, common-mode rejection capability and polarization voltage resistance are tested by controlling switches (S1-Sn) and a switch Sa.

[0034] In order to realize full-automatic testing of electrocardiographs and improve their anti-interference capability, and thus improve the accuracy and repeatability of their performance testing, the present application first proposes a test circuit of an electrocardiograph, as shown in Figure 2 Figure 2 ​is a structural schematic diagram of an embodiment of a test circuit of an electrocardio device. The test circuit (not marked in the figure) of the electrocardio device of the embodiment includes a main controller circuit 10, a slave controller circuit 20, and a detection circuit 30. The main controller circuit 10 is configured to generate at least a first control signal according to test requirements. The slave controller circuit 20 is in communication connection with the main controller circuit 10, and operates under the control of the first control signal. The detection circuit 30 is in electrical connection with the slave controller circuit 20 and an electrocardio device 40, respectively, and is configured to adjust its circuit structure under the control of the slave controller circuit 20, so that the detection circuit 30 after adjustment converts a test signal into different branch signals, to test different performance parameters of the electrocardio device 40 by using the different branch signals.

[0035] In the domestic and international standards related to electrocardio parameters, it is specified that whether each patient electrode is connected to a polarization voltage, connected to a positive polarization voltage or a negative polarization voltage, whether a resistance-capacitance circuit is connected, and lead test time and other parameters, and different parameter states will result in different specific circuit structures of the detection circuit 30.

[0036] The embodiment uses the main controller circuit 10 and the slave controller circuit 20 to adjust the specific circuit structure of the detection circuit 30 according to test requirements, i.e., the above-mentioned parameter requirements, so that the specific circuit after adjustment meets the test requirements, can convert a test signal into branch signals corresponding to the test requirements, and outputs the branch signals to corresponding patient electrodes, to test corresponding performance parameters of the electrocardio device 40 by using the branch signals.

[0037] The main controller circuit 10 of the embodiment can be implemented by a micro controller unit (MCU), and the slave controller circuit 20 can be implemented by another MCU. The two MCUs are in communication connection, such as wired connection (other embodiments can be wireless connection), to achieve electrical isolation between the two MCUs, which means that the main controller circuit 10 and the slave controller circuit 20 will not interfere with each other except for transmitting useful signals.

[0038] Of course, the main controller circuit 10 and the slave controller circuit 20 can be implemented by non-integrated control circuits, and the main controller circuit 10 and the slave controller circuit 20 can be implemented by different and insulated circuit boards. The detection circuit 30 is in electrical isolation with the main controller circuit 10, and can be arranged on the same circuit board as the slave controller circuit 20.

[0039] In the test device (not shown in the figure) of the electrocardio device 40, an insulating piece (not shown in the figure) can be arranged between the master controller circuit 10 and the slave controller circuit 20 and the detection circuit 30, and a through hole for threading a wire is arranged between the insulating pieces; the isolation degree between the master controller circuit 10 and the slave controller circuit 20 and the detection circuit 30 is further improved by the insulating piece.

[0040] The master controller circuit 10 and the slave controller circuit 20 are connected in communication in the embodiment, the performance parameter test of the electrocardio device 40 is controlled, the detection circuit 30 is electrically isolated from the master controller circuit 10, the noise interference of the master controller circuit 10 on the detection circuit 30 is effectively reduced, a cleaner test environment is obtained, the anti-interference performance is improved, the accuracy and repeatability of the test result are improved; the test required by the standard is automatically controlled by the master controller circuit 10 and the slave controller circuit 20 in the embodiment, no manual tedious operation is required in the test process, the production efficiency of the production line can be improved, the training difficulty of the operator is reduced, the test circuit has high integration and high reliability, the accuracy and repeatability of the test result can be effectively improved. Therefore, the full-automatic test of the electrocardio device 40 can be realized, the anti-interference ability is improved, and the accuracy and repeatability of the performance test are improved.

[0041] Optionally, the detection circuit 30 of the embodiment comprises: a resistance-capacitance network 31 and a resistance-capacitance network control circuit 32; the resistance-capacitance network 31 is connected to a test signal and electrically connected to the electrocardio device 40, and the resistance-capacitance network 31 is composed of a plurality of resistance-capacitance circuits (not shown in the figure, a circuit composed of a capacitor and a resistor); the resistance-capacitance network control circuit 32 is electrically connected to the resistance-capacitance circuit and the slave controller circuit 20, respectively, and is used for selecting a single or multiple resistance-capacitance circuits from the resistance-capacitance network 31 to form the detection circuit 30 under the control of the slave controller circuit 20, so that the detection circuit 30 outputs a branch signal corresponding to the test requirement.

[0042] Under the control of the slave controller circuit 20, a single or multiple resistance-capacitance circuits are selected from the resistance-capacitance network 31 to form the detection circuit 30 according to the above-mentioned parameter state.

[0043] Optionally, the test on the ECG device 40 includes a signal test, and the signal test includes a common mode rejection test and a polarization voltage resistance test. The detection circuit 30 of the embodiment further includes a polarization voltage generation circuit 33 and a polarization voltage control circuit 34. The polarization voltage generation circuit 33 is configured to generate a polarization voltage. The polarization voltage control circuit 34 is electrically connected to the RC network 31, the slave controller circuit 20, the polarization voltage generation circuit 33, and the ECG device 40, respectively. The polarization voltage control circuit 34 selectively connects the polarization voltage generation circuit 33 between the selected RC circuit and the ECG device 40 under the control of the slave controller circuit 20, so as to implement the common mode rejection test or the polarization voltage resistance test on the ECG device 40.

[0044] In a test standard, a certain lead (branch) is connected to the RC network, and the other leads are not connected to the RC circuit. It is considered that the certain lead is connected to an unbalanced impedance. At this time, the polarization voltage is applied to the certain lead to perform the polarization voltage resistance test.

[0045] In another test standard, a certain lead (branch) is not connected to the RC network, and the other leads are connected to the RC circuit. It is also considered that the certain lead is connected to an unbalanced impedance. At this time, the polarization voltage is applied to the other leads to perform the polarization voltage resistance test.

[0046] It should be noted that the control signals for controlling the RC network control circuit 32 and the polarization voltage control circuit 34 can be first control signals directly generated by the master controller circuit 10, or can be control signals corresponding to the test requirements and generated by the slave controller circuit 20 based on the first control signals. Here, no specific limitation is made.

[0047] The polarization voltage generation circuit 33 is electrically connected to the ECG device 40 through the polarization voltage control circuit 34.

[0048] Specifically, when the common mode rejection test is performed on the ECG device 40, the polarization voltage is not required to be connected to the test signal (the branch signal of the lead). At this time, the polarization voltage control circuit 34 disconnects the electrical connection between the polarization voltage generation circuit 33 and the ECG device 40 under the control of the slave controller circuit 20, so as to implement the common mode rejection test on the ECG device 40.

[0049] When the polarization voltage resistance test is performed on the ECG device 40, the polarization voltage is required to be connected to the test signal (the branch signal of the lead). At this time, the polarization voltage control circuit 34 connects the electrical connection between the polarization voltage generation circuit 33 and the ECG device 40 under the control of the slave controller circuit 20, so as to implement the polarization voltage resistance test on the ECG device 40.

[0050] Therefore, the embodiment can implement the full-automatic test and switching of the common mode rejection test and the polarization voltage resistance test on the ECG device 40.

[0051] Optionally, the main controller circuit 10 of the embodiment further generates a second control signal according to the test requirements, and the test circuit of the embodiment further comprises a mode switching circuit 50 electrically connected with the main controller circuit 10 and the resistance-capacitance network 31 respectively, for selectively accessing the test signal under the control of the second control signal of the main controller circuit 10, so as to realize the noise test or the signal test (common-mode rejection test and polarization voltage resistance test) of the electrocardiograph 40.

[0052] When the noise test is performed on the electrocardiograph 40, the resistance-capacitance network 31 does not need to access the test signal, at this time, the main controller circuit 10 controls the mode switching circuit 50 to disconnect the access path of the test signal of the resistance-capacitance network 31, so as to realize the noise test of the electrocardiograph 40.

[0053] When the common-mode rejection test or the polarization voltage resistance test is performed on the electrocardiograph 40, the resistance-capacitance network 31 needs to access the test signal, at this time, the main controller circuit 10 controls the mode switching circuit 50 to connect the access path of the test signal of the resistance-capacitance network 31, so as to realize the common-mode rejection test or the polarization voltage resistance test of the electrocardiograph 40.

[0054] Therefore, the embodiment can realize the full-automatic test and switching of the noise test, the common-mode rejection test and the polarization voltage resistance test of the electrocardiograph 40.

[0055] The mode switching circuit 50 of the embodiment is controlled by the main controller circuit 10, and can be arranged on the same circuit board as the main controller circuit 10, while the resistance-capacitance network 31, the resistance-capacitance network control circuit 32, the polarization voltage generation circuit 33 and the polarization voltage control circuit 34 can be arranged on another circuit board as the slave controller circuit 20, so as to realize the electrical isolation between the mode switching circuit 50, the main controller circuit 10 and the resistance-capacitance network 31, the resistance-capacitance network control circuit 32, the polarization voltage generation circuit 33, the polarization voltage control circuit 34 and the slave controller circuit 20.

[0056] In addition to obtaining the first control signal from the main controller circuit 10, the slave controller circuit 20 can also feed back the running state, abnormal state and other information of the resistance-capacitance network 31, the resistance-capacitance network control circuit 32, the polarization voltage generation circuit 33 and the polarization voltage control circuit 34 to the main controller circuit 10.

[0057] The resistance-capacitance network control circuit 32 can control any one or more leads to join the resistance-capacitance network 31, and the polarization voltage control circuit 34 can control any one or more leads to join the positive polarization voltage or the negative polarization voltage, which is finally reflected on the electrocardiograph electrodes of different electrocardiographs 40 to perform the test required by the electrocardiograph standard.

[0058] The resistance-capacitance network control circuit 32 and the polarization voltage control circuit 34 are all automatically completed by the slave controller circuit 20, so that a high-integrated, automatic, high-reliability, high-test-efficiency test system is realized, and finally the test purpose required by the standard is achieved.

[0059] The application further provides a test circuit of an electrocardio device in another embodiment, as shown in the figure. Figure 3 The test circuit of the embodiment is different from the test circuit of the Figure 2 The test circuit of the embodiment further comprises a signal generation circuit 60 electrically connected with the main controller circuit 10 and the resistance-capacitance network 31, for obtaining signal parameters of a test signal from the main controller circuit 10 and generating a test signal corresponding to the signal parameters.

[0060] Different test standards require different standard test signals, and the embodiment uses the main controller circuit 10 to control the signal generation circuit 60 to generate different standard test signals based on different signal parameters, so as to realize different standard tests of the electrocardio device 40.

[0061] The signal generation circuit 60 is electrically connected with the resistance-capacitance network 31 through the mode switching circuit 50; the mode switching circuit 50 is controlled by the second control signal of the main controller circuit 10 to disconnect or connect the electrical connection between the signal generation circuit 60 and the resistance-capacitance network 31, so as to realize noise test or signal test of the electrocardio device 40.

[0062] Therefore, the embodiment not only can realize full-automatic test and switching of noise test, common-mode rejection test and polarization voltage test of the electrocardio device 40, but also can realize automatic test and switching of multiple different standards.

[0063] Further, the signal generation circuit 60 of the embodiment is controlled by the main controller circuit 10 and is arranged on the same circuit board with the main controller circuit 10, so that the signal generation circuit 60 can avoid noise interference on the resistance-capacitance network 31, the resistance-capacitance network control circuit 32, the polarization voltage generation circuit 33, the polarization voltage control circuit 34 and the slave controller circuit 20.

[0064] In another embodiment, the main controller circuit can be an independent microcontroller, and the signal generation circuit can be a DAC circuit built in the microcontroller, which can analog generate a sine wave signal of a standard specified frequency, and through appropriate amplification processing, a test signal required by the standard can be obtained.

[0065] The application further provides a test circuit of an electrocardio device in another embodiment, as shown in the figure. Figure 4 The test requirements of the embodiment include first test requirements and second test requirements, and the test circuit of the embodiment is different from the test circuit of the Figure 3The test circuit of the embodiment is different from the prior art in that the test circuit of the embodiment further comprises a display circuit 70 electrically connected to the main controller circuit 10 and configured to input a first test requirement; and a key circuit 80 electrically connected to the main controller circuit 10 and configured to input a second test requirement.

[0066] The first test requirement can include a test mode of the electrocardiograph 40, such as a noise test mode, a common-mode rejection test mode, a polarization voltage test mode, and a test standard, and the second test requirement can include a test device start, a test device stop, and a test duration.

[0067] The user can send the test standard, the test mode, and the like to the main controller circuit 10 through the display circuit 70, and the test start or end instruction and the like can be sent to the main controller circuit 10 through the key circuit 80.

[0068] The display circuit 70 can also be used for human-computer interaction, and the key circuit 80 can be a jog shuttle, a dial, or the like, and can also be used for human-computer interaction.

[0069] The display circuit 70 displays the amplitude frequency, the lead, and the polarization voltage state of the test signal.

[0070] In other embodiments, the display circuit or the key circuit can be selectively configured to input the test requirement.

[0071] The display circuit 70 and the key circuit 80 are electrically isolated from the resistance-capacitance network 31, the resistance-capacitance network control circuit 32, the polarization voltage generation circuit 33, the polarization voltage control circuit 34, and the slave controller circuit 20, so as to reduce noise interference.

[0072] The electrocardiograph of the present application is a heart monitoring and diagnosis device, such as an electrocardiograph, a fetal heart monitor, and the like.

[0073] The present application further proposes another embodiment of a test circuit of an electrocardiograph, such as Figure 5 and Figure 6As shown, the test circuit of the embodiment includes: a first controller circuit 51, a first secondary control circuit 52, a second secondary control circuit 53, a resistance-capacitance network circuit 36, and a polarization voltage control circuit 34; the first controller circuit 51 is configured to obtain a first control signal and a second control signal corresponding to a test requirement; the resistance-capacitance network circuit 36 is electrically connected to the electrocardiograph 40, and is configured to convert a test signal into a branch signal corresponding to the test requirement, so as to test a corresponding performance parameter of the electrocardiograph 40 by using the branch signal; the polarization voltage control circuit 34 is electrically connected to the resistance-capacitance network circuit 36 and the electrocardiograph 40, and is configured to access a polarization voltage to the test signal; the first secondary control circuit 52 is electrically connected to the resistance-capacitance network circuit 36 and the first controller circuit 51 respectively, and works under the control of the first control signal; the resistance-capacitance network circuit 36 adjusts its circuit structure under the control of the first secondary control circuit 52, so that the adjusted circuit structure can convert the test signal into the branch signal corresponding to the test requirement; the second secondary control circuit 53 is electrically connected to the first controller circuit 51 and the polarization voltage control circuit 34 respectively, and works under the control of the second control signal; the polarization voltage control circuit 34 selectively accesses the polarization voltage to the branch signal under the control of the second secondary control circuit 53, so as to realize the polarization voltage resistance test or common-mode rejection test of the electrocardiograph 40.

[0074] In the embodiment, the first secondary control circuit 52 and the second secondary control circuit 53 are arranged between the first controller circuit 51 and the resistance-capacitance network circuit 36 and the polarization voltage control circuit 34 respectively, so that the first secondary control circuit 52 obtains the first sub-control signal and the second secondary control circuit 53 obtains the second sub-control signal can be processed in parallel, which not only can reduce the number of ports on the first controller circuit 51, realize efficient control, but also can improve the synchronization of the first controller circuit 51 to the resistance-capacitance network circuit 36 and the polarization voltage control circuit 34, and further can improve the accuracy of the test; at the same time, the first secondary control circuit 52 can convert a serial signal into a parallel signal, so as to synchronously apply the first sub-control signal to multiple control parts of the resistance-capacitance network circuit 36, and the second secondary control circuit 53 can convert a serial signal into a parallel signal, so as to synchronously apply the second sub-control signal to multiple control parts of the polarization voltage control circuit 34 corresponding to multiple resistance-capacitance circuits 54, so as to realize the independent control of the first controller circuit 51 to any control part (lead switch). Therefore, the embodiment can improve the control efficiency and accuracy of the electrocardiograph 40 test.

[0075] In the embodiment, the first controller circuit 51, the first secondary control circuit 52, and the second secondary control circuit 53 realize the controller circuit 20.

[0076] Optionally, the RC network circuit 36 of the embodiment comprises: an RC network 31 and an RC network control circuit 32; the RC network 31 is connected to the test signal and electrically connected to the ECG device 40, and the RC network 31 is composed of a plurality of RC circuits 54; the RC network control circuit 32 is electrically connected to the RC circuit 54 and the first secondary control circuit 52 respectively, and is used to select a single or multiple RC circuits 54 from the RC network 31 to form an adjusted network structure under the control of the first secondary control circuit 52.

[0077] Optionally, the embodiment further comprises a polarization voltage generating circuit 33 for generating a polarization voltage; a polarization voltage control circuit 34 is electrically connected to the RC network 31, the second secondary control circuit 53, the polarization voltage generating circuit 33 and the ECG device 40 respectively, and is used to selectively connect the polarization voltage generating circuit 33 between the RC circuit 54 and the ECG device 40 under the control of the second control signal, so as to realize the common mode rejection test or the polarization voltage resistance test of the ECG device 40.

[0078] The RC network 31, the RC network control circuit 32, the polarization voltage generating circuit 33 and the polarization voltage control circuit 34 of the embodiment form the detection circuit 30.

[0079] The adjustment of the circuit structure is to select a single or multiple RC circuits 54 from the RC network 31 to form the RC network 31 corresponding to the test requirements and standards.

[0080] Optionally, the test circuit of the embodiment further comprises a second controller circuit (not marked in the figure) connected to the first controller circuit 20, and is used to obtain the test requirements and generate the first control signal and the second control signal according to the test requirements.

[0081] In the embodiment, the main controller circuit 10 is realized by the second controller circuit.

[0082] In other embodiments, the first sub-control signal and the second sub-control signal can be generated by the first controller circuit 20 based on the first control signal.

[0083] Optionally, the embodiment can further comprise other circuits in the above-mentioned embodiments, and details can be referred to the above-mentioned embodiments, which will not be described here. Figure 5

[0084] ​Optionally, the resistance-capacitance network control circuit 32 of the embodiment comprises a plurality of first switches K1 (lead switches) corresponding to the plurality of resistance-capacitance circuits 54, one resistance-capacitance circuit 54 is connected to the test signal (connected to the signal generating circuit 60 through the mode switching circuit 50) at one end, and connected to the electrocardiograph 40 at the other end, the fixed end of the first switch K1 is connected to one end of the resistance-capacitance circuit 54, and the selection end of the first switch K1 is selectively connected to the electrocardiograph 40 under the control of the first secondary control circuit 52.

[0085] The first secondary control circuit 52 determines whether each resistance-capacitance circuit 54 is connected to the resistance-capacitance network 31 (whether the lead is connected) according to the first sub-control signal, and controls the first switch K1 corresponding to the resistance-capacitance circuit 54 to be connected to close when it is determined that the resistance-capacitance circuit 54 is to be connected.

[0086] Optionally, the resistance-capacitance network control circuit 32 of the embodiment further comprises a first driving circuit, which can be a driver 55, electrically connected to the first secondary control circuit 52 and the selection end of the first switch K1, respectively, for driving the first switch K1 to act under the control of the first secondary control circuit 52.

[0087] The driver 55 is provided in the embodiment to increase the driving capability of the first switch K1 and ensure the normal operation of the first switch K1.

[0088] Optionally, the polarization voltage control circuit 33 of the embodiment comprises a plurality of second switches K2 (lead switches) corresponding to the plurality of resistance-capacitance circuits 54, and the two fixed ends of the second switch K2 are respectively connected to the resistance-capacitance circuit 54 and the polarization voltage generating circuit 33, and the selection end of the second switch K2 is selectively connected to the electrocardiograph 40 under the control of the second secondary control circuit 53.

[0089] The second secondary control circuit 53 determines whether the branch where each resistance-capacitance circuit 54 is located is connected to the polarization voltage according to the second sub-control signal, and controls the corresponding second switch K2 to close when it is determined that the branch where the resistance-capacitance circuit 54 is located is to be connected to the polarization voltage.

[0090] To simplify the circuit structure, only one polarization voltage generating circuit 33 can be provided, which is electrically connected to a plurality of polarization voltage control circuits 33 to provide polarization voltage for a plurality of branches.

[0091] The polarization voltage control circuit 33 can also control the polarization voltage generating circuit 33 to output positive polarization voltage or negative polarization voltage.

[0092] Optionally, the polarization voltage control circuit 33 of this embodiment further includes: a second driving circuit, which may be a driver 56, electrically connected to the selection terminal of the second-stage control circuit 53 and the second switch K2 respectively, for driving the second switch K2 to operate under the control of the second-stage control circuit 53.

[0093] In this embodiment, by setting the driver 56, the driving capability of the second switch K2 is increased, ensuring that the second switch K2 operates normally.

[0094] The primary control circuit 52 and the secondary control circuit 53 can be implemented using a control chip.

[0095] Optionally, the first-stage control circuit 52 of this embodiment is provided with a first enable port (not shown), and the second-stage control circuit 53 is provided with a second enable port (not shown). Both the first enable port and the second enable port are electrically connected to the first controller circuit 51 to synchronously obtain enable signals from the first controller circuit 51. This can improve the synchronization of the above-mentioned switching action and reduce the interference of the RC network 31 and polarization voltage switching process on the test.

[0096] The specific circuit structures of the RC network 31, RC network control circuit 32, polarization voltage generation circuit 33, and polarization voltage control circuit 34 in this embodiment can be used in other embodiments.

[0097] This application further proposes a test circuit for an electrocardiogram (ECG) device, such as... Figure 7 As shown, the test circuit of this embodiment includes: a control circuit 72, an RC network 31, a first relay (not shown), and a polarization voltage control circuit 34; wherein, the control circuit 72 is used to generate a control signal corresponding to the test requirements; the RC network 31 is used to receive the test signal and is electrically connected to the ECG device 40, and the RC network 31 consists of multiple RC circuits 54 (see...). Figure 6 The device consists of: a first relay electrically connected to the control circuit 72 and the resistor-capacitor circuit 54, used to select one or more resistor-capacitor circuits 54 from the resistor-capacitor network 31 to form a test circuit under the control of the control signal, so that the test circuit outputs a branch signal corresponding to the test requirements, so as to test different performance parameters of the ECG device using different branch signals; a polarization voltage control circuit 34 electrically connected to the control circuit 72, the first relay and the ECG device 40, used to selectively apply the polarization voltage to the branch between the selected resistor-capacitor circuit 54 and the ECG device 40 under the control of the control signal, so as to realize the common mode rejection test or polarization voltage withstand test of the ECG device 40.

[0098] In this embodiment, the first relay is used to implement the switching circuit in the RC network control circuit 32. To ensure the normal operation of the first relay, a first driving circuit (not shown in the figure) can also be set up, which is electrically connected to the control circuit 72 and the first relay, and is used to drive the first relay to operate under the control of the control circuit 72.

[0099] This embodiment utilizes a relay to implement the control circuit of the RC network, and uses the control circuit to control the relay operation, which can automatically complete the tests required by the standard. No tedious manual operation is required during the test, which can improve the test efficiency. Moreover, the test circuit has high integration and high reliability, which can effectively ensure the accuracy and repeatability of the test results.

[0100] In another embodiment, such as Figure 8 As shown, the RC circuit 54 in this embodiment includes: a capacitor c and a resistor r; one end of the capacitor c is connected to a test signal (electrically connected to port A3), and the other end of the capacitor c is electrically connected to the ECG device 40 (connected to port A4) through the polarization voltage control circuit 33; one end of the resistor r is electrically connected to one end of the capacitor c, and the other end of the resistor r is electrically connected to the other end of the capacitor c; the first switch K1 is implemented through a first relay, the control terminal 8 of the first relay is electrically connected to the control circuit 72 (specifically to the first primary control circuit 52), the stationary contact 4 of the first relay is electrically connected to the other end of the capacitor c, and the moving contact 3 of the first relay is electrically connected to one end of the capacitor c.

[0101] In this embodiment, the polarization voltage control circuit 34 is electrically connected to the RC network 31, the control circuit 72 (specifically the second-stage control circuit 53), the polarization voltage generating circuit 33, and the ECG device 40, respectively. It is used to connect the polarization voltage generating circuit 33 in series between the selected RC circuit 54 and the ECG device 40 under the control of the control signal, so as to realize the common-mode rejection test or polarization voltage withstand test of the ECG device 40.

[0102] Figure 8 Only one RC circuit 54 and its corresponding control circuit section are shown in this embodiment, namely one lead branch and its control circuit. The implementation of other lead branches is similar. The first-level control circuit 52 controls whether the current lead is connected to the unbalanced impedance (RC circuit 54) by controlling the control terminal 8 of the first relay. The stationary contact 2 of the first relay is unconnected. When the first relay is activated, the unbalanced impedance is not connected, and vice versa.

[0103] For different test standards, when a certain lead is connected to the RC circuit 54 while all other leads are not connected to the RC circuit 54, or when the lead is not connected to the RC circuit 54 while all other leads are connected to the RC circuit 54, it is said that an unbalanced impedance has been added to that lead. Similarly, the way to add unbalanced impedance to other leads is the same as for this lead.

[0104] In other embodiments, a relay with only one stationary contact and one movable contact can be selected.

[0105] Optionally, the test circuit of the embodiment further comprises a signal generating circuit 60 electrically connected with the control circuit 72 and the RC network 31, for obtaining signal parameters of the test signal from the control circuit 72 (specifically from the main controller circuit 10) and generating a test signal corresponding to the signal parameters.

[0106] Optionally, the test circuit of the embodiment further comprises a mode switching circuit 50 electrically connected with the control circuit 72 (specifically with the main controller circuit 10), the signal generating circuit 60 and the RC network 31, for disconnecting or connecting the electrical connection between the signal generating circuit 60 and the RC network 31 under the control of the control circuit 72 (specifically of the main controller circuit 10), so as to realize noise test or signal test of the ECG device 40, wherein the test signal includes common-mode rejection test and polarization voltage test.

[0107] Optionally, the test circuit of the embodiment further comprises a display circuit 70 electrically connected with the control circuit 72 (specifically with the main controller circuit 10), for inputting first test requirements; and a key circuit 80 electrically connected with the control circuit 72 (specifically with the main controller circuit 10), for inputting second test requirements.

[0108] Other circuit structures of the test circuit of the embodiment can refer to the above-mentioned embodiments, which will not be described here.

[0109] In another embodiment, as shown in Figure 9 The second switch K2 of the polarization voltage control circuit 34 of the embodiment is realized by a second relay, the control end 8 of the second relay is electrically connected with the control circuit 72 (specifically with the second secondary control circuit 53), the first stationary contact 2 of the second relay is electrically connected with the second stationary contact 7, the third stationary contact 4 and the fourth stationary contact 5 of the second relay are respectively electrically connected with two electrodes of the polarization voltage generating circuit 33, the first movable contact 3 of the second relay is electrically connected with the RC circuit 54 (electrically connected with the port A4), and the second movable contact 6 of the second relay is electrically connected with the ECG device 40 (connected with the port A5).

[0110] The control end 8 of the second relay controls the electrical connection between the first moving contact 3 and the first stationary contact 2 and the electrical connection between the second moving contact 6 and the second stationary contact 7 under the control of the control signal of the control circuit 72 (specifically, the second secondary control circuit 53), at this time, the second relay disconnects the electrical connection between the blocking capacitor circuit 54 and the polarization voltage generating circuit 33, and the lead branch where the blocking capacitor circuit 54 is located is not connected to the polarization voltage; or the control end 8 of the second relay controls the electrical connection between the first moving contact 3 and the third stationary contact 4 and the electrical connection between the second moving contact 6 and the fourth stationary contact 5 under the control of the control signal of the control circuit 72, at this time, the second relay connects the electrical connection between the blocking capacitor circuit 54 and the polarization voltage generating circuit 33, and the lead branch where the blocking capacitor circuit 54 is located is connected to the polarization voltage.

[0111] Optionally, the polarization voltage generating circuit 51 of the embodiment includes a voltage source (not marked in the figure) and a third relay (not marked in the figure), the control end of the third relay is electrically connected with the control circuit 72 (specifically, the second secondary control circuit 53), the first stationary contact 4 and the second stationary contact 7 of the third relay are respectively electrically connected with the positive electrode of the voltage source, the third stationary contact 2 and the fourth stationary contact 5 of the third relay are respectively electrically connected with the negative electrode of the voltage source of the third relay, the first moving contact 3 of the third relay is electrically connected with the third stationary contact 4 of the second relay, and the second moving contact 6 of the third relay is electrically connected with the fourth stationary contact 5 of the second relay.

[0112] The control end 8 of the third relay controls the electrical connection between the first moving contact 3 of the third relay and the first stationary contact 4 of the third relay and the electrical connection between the second moving contact 6 of the third relay and the fourth stationary contact 5 of the third relay under the control of the control signal of the control circuit 72 (specifically, the second secondary control circuit 53); at this time, the polarization voltage generating circuit 33 connects the positive polarization voltage between the ports A4 and A5, that is, connects the positive polarization voltage on the lead branch (branch signal). Or the control end 8 of the third relay controls the electrical connection between the first moving contact 3 of the third relay and the third stationary contact 2 of the third relay and the electrical connection between the second moving contact 6 of the third relay and the second stationary contact 7 of the third relay under the control of the control signal of the control circuit 72 (specifically, the second secondary control circuit 53); at this time, the polarization voltage generating circuit 33 connects the negative polarization voltage between the ports A4 and A5, that is, connects the negative polarization voltage on the lead branch.

[0113] Optionally, the polarization voltage control circuit 34 includes a plurality of second relays, the polarization voltage generating circuit 33 includes a third relay, the plurality of second relays are arranged one-to-one with the plurality of blocking capacitor circuits 54, and the third relay is electrically connected with the plurality of second relays. In this way, the circuit structure can be simplified and the circuit area can be reduced.

[0114] Figure 9Only one polarization voltage control circuit 34 and polarization voltage generating circuit 33 in the embodiment are shown; the polarization voltage is essentially a direct current bias voltage of a certain amplitude, which can be obtained by a direct current power supply such as an alkaline battery through certain voltage division adjustment.

[0115] To ensure the normal operation of the second relay, a second driving circuit (not shown in the figure) can also be provided, which is electrically connected with the control circuit 72 and the second relay, and is used to drive the second relay to act under the control of the control circuit 72.

[0116] A driving circuit can be provided for the third relay to ensure the normal operation of the third relay.

[0117] Optionally, as shown in Figure 10 The mode switching circuit 50 of the embodiment includes a fourth relay, the control end 8 of the fourth relay is electrically connected with the control circuit 72 (specifically, the main controller circuit 10), the first static contact 2 of the fourth relay is empty (port A1 is empty), the second static contact 4 of the fourth relay is electrically connected with the access test signal (connected with port A2 of the signal generating circuit 60), and the moving contact 3 of the fourth relay is electrically connected with the resistance-capacitance network 31 (connected with port A3 of the resistance-capacitance network 31).

[0118] In other embodiments, a relay with only two static contacts and one moving contact can be selected.

[0119] The main controller circuit 10 controls the switching of the noise test and the signal test through the control end 8 of the fourth relay. Specifically, the second static contact 4 of the fourth relay is electrically connected with the signal generating circuit 60.

[0120] When the noise test is performed, the moving contact 3 of the fourth relay is conductive with the first static contact 2, and the first static contact 2 is empty because the standard defines that no signal is accessed during the noise test; when the common-mode rejection capability and the polarization voltage resistance test are performed, the moving contact 3 of the fourth relay is conductive with the second static contact 4, and the test signal is accessed; the control end 8 of the fourth relay is controlled by the main controller circuit 10 outputting high and low levels, the fourth relay accesses the first static contact 2 to output the noise signal by default, and when the fourth relay acts, the second static contact 4 is accessed to output the test signal.

[0121] A driving circuit can be provided for the fourth relay to ensure the normal operation of the fourth relay.

[0122] Different from the prior art, the embodiment uses a relay to realize the lead switch in the test circuit, and the relay is controlled to act through the controller circuit, so that the required tests in the standard can be completed.

[0123] As to the working principle of the relay, when the control signal is connected to the control end 8, the movable contact 3, 6 of the relay will be attracted to the static contact 2, 7 close to the control end 8, and vice versa, the movable contact 3, 6 of the relay will be attracted to the static contact 4, 5 away from the control end 8.

[0124] In other embodiments, analog switches or power tube switches can also be used instead of relays.

[0125] The application further provides a test method of an electrocardio device, which is used for the test device of the electrocardio device. Figure 11 As shown in the figure, the test method of the embodiment comprises the following steps:

[0126] Step S11: The main controller circuit acquires the test requirement and generates at least a first control signal according to the test requirement.

[0127] The test requirement comprises signal test and noise test; the test requirement further comprises test standard information; and the test requirement further comprises test device start, stop and test duration information.

[0128] Step S12: The slave controller circuit works under the control of the first control signal.

[0129] The slave controller circuit controls the detection circuit to perform performance test on the electrocardio device under the control of the main controller circuit.

[0130] Step S13: The detection circuit adjusts the circuit structure of the detection circuit under the control of the slave controller circuit, so that the adjusted detection circuit converts the test signal into different branch signals to test different performance parameters of the electrocardio device by using the different branch signals.

[0131] In response to the test requirement being noise test, the main controller circuit controls the detection circuit not to connect the test signal, and the slave controller circuit adjusts the circuit structure of the detection circuit based on the standard requirement of the noise test; in response to the test requirement being signal test, the main controller circuit controls the detection circuit to connect the test signal, and the slave controller circuit adjusts the circuit structure of the detection circuit based on the standard requirement of the signal test.

[0132] The signal test comprises common mode rejection test and polarization voltage resistance test; the slave controller circuit controls a single or multiple resistance-capacitance circuits in the detection circuit to connect the test signal based on the standard requirement of the common mode rejection test, so as to perform common mode rejection test on the electrocardio device; in response to the completion of the common mode rejection test, the slave controller circuit controls the resistance-capacitance circuit in the detection circuit to connect the polarization voltage based on the standard requirement of the polarization voltage resistance test, so as to perform polarization voltage resistance test on the electrocardio device.

[0133] The detection circuit adjusts the connection of the resistance-capacitance network and the polarization voltage in each lead under the control of the controller circuit, so that the adjusted detection circuit meets the requirements of the test standard.

[0134] The test method of the embodiment can further refer to the working principle of the test circuit described above.

[0135] The application further proposes a test method of an electrocardio device of another embodiment, which is used for the test device of the electrocardio device described above, as shown in the figure. Figure 12 The test method of the embodiment includes the following steps: after starting, the system is initialized by default without test signal output and without polarization voltage connection; the user selects to perform noise test, common-mode rejection capability test or polarization voltage resistance test according to the test requirements; if the noise test is performed, the test signal input is disconnected according to the standard requirements, and the lead electrodes are all connected together through the resistance-capacitance network for testing; if the common-mode rejection capability test or the polarization voltage resistance test is performed, the test signal is connected according to the standard requirements; the user can select manual control test or automatic control test; for the manual control test, if the common-mode rejection ratio test is performed, the unbalanced impedance is connected to the corresponding lead according to the user selection for testing; if the polarization voltage resistance test is performed, the unbalanced impedance is connected to the corresponding lead according to the user selection, and then the corresponding polarization voltage is connected for testing; for the automatic control test, the user sets the automatic parameters according to the requirements, including the test time of each lead, whether to perform polarization voltage resistance test and the like, and then the automatic program automatically controls the operation for testing according to the settings.

[0136] Different from the prior art, the application uses the master controller circuit and the slave controller circuit connected in communication to realize the control of the performance parameter test of the electrocardio device, and the detection circuit is electrically isolated from the master controller circuit, which can effectively reduce the noise interference of part of the control circuit, i.e., the master controller circuit on the detection circuit, obtain a cleaner test environment, improve the anti-interference performance, and improve the accuracy and repeatability of the test results; and the application automatically controls the test required by the standard through the master controller circuit and the slave controller circuit, without manual tedious operation in the test process, which can improve the production efficiency of the production line, reduce the training difficulty of the operators, and the test circuit has high integration and high reliability, which can effectively improve the accuracy and repeatability of the test results. Therefore, the application can realize the full automation test of the electrocardio device, improve the anti-interference ability, and further improve the accuracy and repeatability of the performance test.

[0137] The above description is only an embodiment of the application, and does not limit the patent scope of the application, and any equivalent mechanism or equivalent process transformation using the content of the specification and the drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A test circuit for an electrocardiograph device, characterized by The application relates to a testing device for an electrocardiograph, which comprises: a main controller circuit for generating at least a first control signal according to a testing requirement; a slave controller circuit in communication connection with the main controller circuit, which works under the control of the first control signal; a detection circuit in electrical connection with the slave controller circuit and the electrocardiograph respectively, which adjusts its circuit structure under the control of the slave controller circuit, so that the detection circuit converts a testing signal into different branch signals after adjustment, and uses the different branch signals to test different performance parameters of the electrocardiograph; a signal generating circuit in electrical connection with the main controller circuit and the detection circuit respectively, which obtains signal parameters of the testing signal from the main controller circuit, and generates the testing signal corresponding to the signal parameters; the main controller circuit further generates a second control signal according to the testing requirement, and the testing circuit further comprises a mode switching circuit in electrical connection with the main controller circuit, the signal generating circuit and the detection circuit respectively, which disconnects or connects the electrical connection between the signal generating circuit and the detection circuit under the control of the second control signal, so as to realize noise testing or signal testing of the electrocardiograph, and the signal testing includes common mode rejection testing and polarization voltage resistance testing.

2. The test circuit of claim 1, wherein, The detection circuit comprises: a resistance-capacitance network in electrical connection with the testing signal and the electrocardiograph, which is composed of multiple resistance-capacitance circuits; a resistance-capacitance network control circuit in electrical connection with the resistance-capacitance circuits and the slave controller circuit respectively, which selects single or multiple resistance-capacitance circuits from the resistance-capacitance network to form the detection circuit under the control of the slave controller circuit, so that the detection circuit outputs the branch signal corresponding to the testing requirement.

3. The test circuit of claim 2, wherein, The resistance-capacitance network control circuit comprises multiple first switches corresponding to the multiple resistance-capacitance circuits one by one, one end of the resistance-capacitance circuit is connected with the testing signal, and the other end is in electrical connection with the electrocardiograph, the fixed end of the first switch is connected with the one end of the resistance-capacitance circuit, and the selection end of the first switch is selectively in electrical connection with the electrocardiograph under the control of the slave controller circuit.

4. The test circuit of claim 2, wherein, The testing of the electrocardiograph includes signal testing, the signal testing includes common mode rejection testing and polarization voltage resistance testing, and the detection circuit further comprises: a polarization voltage generating circuit for generating a polarization voltage; a polarization voltage control circuit in electrical connection with the resistance-capacitance network, the slave controller circuit, the polarization voltage generating circuit and the electrocardiograph respectively, which selectively connects the polarization voltage generating circuit between the selected resistance-capacitance circuit and the electrocardiograph under the control of the slave controller circuit, so as to realize the common mode rejection testing or the polarization voltage resistance testing of the electrocardiograph.

5. The test circuit of claim 4, wherein, The polarization voltage control circuit comprises a plurality of second switches, which are arranged one by one corresponding to the plurality of RC circuits, and two fixed ends of the second switch are electrically connected with the RC circuit and the polarization voltage generation circuit respectively, and a selection end of the second switch is selectively electrically connected with the ECG device under the control of the slave controller circuit.

6. The test circuit according to any one of claims 1 to 5, characterized in that, The test requirements comprise first test requirements and second test requirements, and the test circuit further comprises: a display circuit electrically connected with the master controller circuit, for inputting the first test requirements; a key circuit electrically connected with the master controller circuit, for inputting the second test requirements.

7. The test circuit according to any one of claims 1 to 5, characterized in that, The master controller circuit, the slave controller circuit and the detection circuit are implemented through different and insulated circuit boards.

8. The test circuit of claim 6, wherein, The signal generation circuit is electrically isolated from the slave controller circuit and the detection circuit.

9. A method of testing an electrocardiograph device, characterized by, The test method for the test circuit of any one of claims 1 to 8 comprises: The master controller circuit acquires test requirements and generates at least a first control signal according to the test requirements; The slave controller circuit works under the control of the first control signal; The detection circuit adjusts the circuit structure of the detection circuit under the control of the slave controller circuit, so that the adjusted detection circuit converts the test signal into different branch signals to test different performance parameters of the ECG device by using the different branch signals.

10. The test method of claim 9, wherein, The test requirements comprise signal test and noise test, and the detection circuit adjusts the circuit structure of the detection circuit under the control of the slave controller circuit, so that the adjusted detection circuit converts the test signal into different branch signals to test different performance parameters of the ECG device by using the different branch signals, comprising: In response to the test requirement being the noise test, the master controller circuit controls the detection circuit not to access the test signal, and the slave controller circuit adjusts the circuit structure of the detection circuit based on the standard requirements of the noise test; In response to the test requirement being the signal test, the master controller circuit controls the detection circuit to access the test signal, and the slave controller circuit adjusts the circuit structure of the detection circuit based on the standard requirements of the signal test.

11. The test method of claim 10, wherein, The signal test comprises common mode rejection test and polarization voltage resistance test, and the slave controller circuit adjusts the circuit structure of the detection circuit based on the standard requirements of the signal test, comprising: The slave controller circuit controls a single or multiple RC circuits in the detection circuit to access the test signal based on the standard requirements of the common mode rejection test, to perform the common mode rejection test on the ECG device; In response to the completion of the common mode rejection test, the slave controller circuit controls the RC circuit accessing the test signal in the detection circuit to access polarization voltage based on the standard requirements of the polarization voltage resistance test, to perform the polarization voltage resistance test on the ECG device.

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