CN213365679U - Medical equipment and light projection type safety warning circuit thereof - Google Patents

Abstract

The utility model discloses a medical device and a light-projecting safety warning circuit thereof, the light-projecting safety warning circuit comprises a fault detection circuit and a control circuit, the control circuit receives fault detection signals output by the fault detection circuit and sends out indication signals; the light projection type safety warning circuit further comprises a light projection module, the light projection module comprises a light projection control circuit, a light emitting device and a lens assembly, the light projection control circuit receives the indication signal and sends a control signal to the light emitting device, and the lens assembly is located on one side of the light emitting surface of the light emitting device. The medical equipment comprises the light-projecting safety warning circuit. The utility model discloses can improve medical equipment's safety warning performance, let medical personnel more timely know the alarm signal that medical equipment sent.

Description

Medical equipment and light projection type safety warning circuit thereof

Technical Field

The utility model relates to a medical equipment field especially relates to a medical equipment and this kind of medical equipment's light-projecting formula safety warning circuit.

Background

Medical equipment such as blood purification equipment can break down in the course of operation inevitable, in case blood purification equipment breaks down in the course of operation, can influence patient's life safety, for this reason, current blood purification equipment will set up alarm device usually, in case blood purification equipment breaks down, will send alarm signal, for example send alarm signal through illuminator or speaker etc. to suggestion medical personnel handle blood purification device's trouble as early as possible.

At present, most of the alarm signals sent by the medical equipment are sent by a light emitting device or a display screen, etc., for example, the light emitting device sends signals with different colors, or characters, patterns, etc. of the alarm are displayed on the display screen. However, the existing alarm mode is only to emit a light source, and does not perform any special treatment on the light source, which leads to that the alarm light source is easily overlooked. For example, the light emitted by the blood purification device for alarming is blocked by other devices during the transmission process, so that the medical staff cannot acquire the alarm signal of the medical device. Due to the special application scene of the blood purification equipment, the requirement on safety performance is very high, and if the alarm signal sent by the blood purification equipment is ignored by medical staff in the blood purification process of a patient, the safety of the blood purification treatment process is greatly endangered, and even the life safety of the patient is endangered.

Therefore, the alarm safety level of the existing medical equipment is not high, and medical staff can easily ignore the alarm signal sent by the medical equipment.

SUMMERY OF THE UTILITY MODEL

The first purpose of the utility model is to provide a medical equipment's light-projecting formula safety warning circuit who effectively reports to police the suggestion to medical personnel.

A second object of the present invention is to provide a medical device with high alarm safety level.

In order to achieve the first object, the light-projecting safety warning circuit of the medical device provided by the present invention comprises a fault detection circuit and a control circuit, wherein the control circuit receives a fault detection signal output by the fault detection circuit and outputs an indication signal; the light projection type safety warning circuit further comprises a light projection module, the light projection module comprises a light projection control circuit, a light emitting device and a lens assembly, the light projection control circuit receives the indication signal and sends a control signal to the light emitting device, the lens assembly is located on one side of the light emitting surface of the light emitting device, and the lens assembly is used for carrying out light condensation projection on light rays sent by the light emitting device.

By the scheme, once medical equipment such as blood purification equipment breaks down in the operation process, the fault detection circuit sends a fault detection signal to the control circuit, the control circuit sends an indication signal to the light projection module immediately, and light rays sent by the light emitting device are projected onto a projected surface such as a wall surface through the lens assembly. Because the light emitted by the light-emitting device is projected through the condensation of the lens component, the energy of the light emitted by the light-emitting device is more concentrated, and the energy loss is avoided. And, the area of light spot that light formed through the lens subassembly is bigger, and the light spot has higher directionality, can change the output direction of light spot through the directionality of adjusting the lens subassembly, avoids the light spot to be sheltered from by other equipment, lets medical personnel notice the alarm signal that medical equipment sent more easily, and medical equipment's security level is higher.

Preferably, the lens assembly comprises more than one lens, the lenses being located on the optical axis of the light emitting device.

Therefore, the lens is positioned on the optical axis of the light-emitting device, so that light rays emitted by the light-emitting device can be focused by the lens, and the direction of the light rays emitted by the light-emitting device can be accurately adjusted, and the warning signal can be ensured to attract the attention of medical personnel.

Preferably, the number of lenses is two or more.

Therefore, the plurality of lenses are all located on the light propagation path of the light emitted by the light emitting device, the light emitted by the light emitting device can sequentially pass through the plurality of lenses, the positions of light spots can be adjusted by adjusting the positions of the plurality of lenses, and the light emitted by the light emitting device is ensured not to be shielded by other equipment.

The light projection module further comprises a power circuit, the power circuit supplies power to the light projection control circuit, the power circuit further comprises a power state indicating circuit, and the power state indicating circuit receives signals output by the power circuit.

It is thus clear that in case the power supply circuit to the power supply of light projecting module breaks down, the signal that power status indicating circuit sent changes immediately, and medical personnel can judge whether power supply circuit is normal according to power status indicating circuit's signal. Therefore, the light projection module can be ensured to work under the normal power supply environment.

In a further aspect, the power circuit includes a dc voltage reduction circuit, and the power state indication circuit receives a signal output by the dc voltage reduction circuit.

Therefore, the plurality of circuits of the light projecting module can be powered by the direct current voltage reduction circuit, the working condition of the direct current voltage reduction circuit is detected, corresponding signals are sent, and the power state of the light projecting module can be accurately indicated.

The projection control circuit comprises a communication circuit and a PLC controller, and the PLC controller receives the indication signal through the communication circuit.

Therefore, the control circuit and the PLC belong to two different types of control devices, signals are converted through the communication circuit, and the PLC can accurately receive the signals sent by the control circuit.

In a further aspect, the fault detection circuit includes a power detection circuit that detects a power of the rotating device.

Because the rotating device is a core working device in the blood purification equipment, the control circuit mainly detects the power supply condition of the rotating device and can detect and indicate the power supply condition of the most critical working device of the blood purification equipment.

According to a further scheme, the fault detection circuit further comprises a rotating speed detection circuit, and the rotating speed detection circuit detects the rotating speed of the rotating device.

Therefore, the rotating speed detection circuit detects the rotating speed of the rotating device, can monitor the working state of the most critical working device of the blood purification equipment in real time, sends out an indicating signal when the rotating speed of the rotating device is abnormal, and timely handles the abnormal condition of the rotating device by medical personnel, so that the safety performance of the blood purification equipment is improved.

Still further, the rotating device is a blood pump and/or a heparin pump.

In order to achieve the second objective, the present invention provides a medical device having the above-mentioned light-projecting safety warning circuit.

Drawings

Fig. 1 is a schematic diagram of an application scenario of an embodiment of the medical apparatus of the present invention.

Fig. 2 is a block diagram of the embodiment of the light-projecting safety warning circuit of the present invention.

Fig. 3 is an electrical schematic diagram of a power detection circuit according to an embodiment of the light-projecting safety warning circuit of the present invention.

Fig. 4 is an electrical schematic diagram of a first power supply circuit according to an embodiment of the light-projecting safety warning circuit of the present invention.

Fig. 5 is an electrical schematic diagram of a second power supply circuit according to an embodiment of the light-projecting safety warning circuit of the present invention.

Fig. 6 is an electrical schematic diagram of a control circuit according to an embodiment of the light-projecting safety warning circuit of the present invention.

Fig. 7 is an electrical schematic diagram of a communication circuit according to an embodiment of the light-projecting safety warning circuit of the present invention.

Fig. 8 is an electrical schematic diagram of the dc voltage reduction circuit according to the embodiment of the light-projecting safety warning circuit of the present invention.

Fig. 9 is an electrical schematic diagram of a status indication circuit according to an embodiment of the light-projecting safety warning circuit of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

The medical equipment of the utility model can be blood purification equipment, etc., and the blood purification equipment is taken as an example to illustrate the utility model in detail. Blood clarification plant is provided with host computer and blood purification consumptive material, still is provided with light projection formula safety warning circuit, and in blood clarification plant working process, if abnormal conditions appeared, light projection formula safety warning circuit can send alarm signal to in time handle blood clarification plant's trouble for medical personnel.

Referring to fig. 1, the blood purification apparatus 50 is provided with a blood pump 51 and a heparin pump 52, and the blood pump 51 and the heparin pump 52 are continuously rotated while being operated, and thus, these two devices are the rotating devices of the present embodiment. During the blood purification process, the blood pump 51 is used to control the flow rate of the blood, for example by adjusting the rotational speed of the blood pump 51 to achieve an adjustment of the blood output speed. The heparin pump 52 is used to control the heparin output rate, for example, by varying the rotational speed of the heparin pump 52 to adjust the heparin output rate. The operation principle of the blood pump 51 and the heparin pump 52 is known in the art and will not be described in detail here.

The blood purification device 50 is internally provided with a light-emitting device 22 and a lens assembly 23, light rays emitted by the light-emitting device 22 can be condensed and adjusted in direction by the lens assembly 23, and then are projected on a projected surface 55 to form light spots 24 on the projected surface 55; preferably, the projected surface 55 is a wall, a curtain, or other device. Once the blood purifying apparatus 50 has a fault, the light-emitting device 22 can emit an alarm signal, such as light with a specific color or warning words, and the alarm signal can be projected onto the projected surface 55 through the lens assembly 23, which is beneficial for medical staff to know the fault condition of the blood purifying apparatus 50 in time.

Referring to fig. 2, the light-projecting safety warning circuit includes a fault detection circuit 30, a power amplification circuit 11, a control circuit 10 and a light-projecting module, where the fault detection circuit 30 is configured to detect whether a fault occurs in an operation process of the blood purification apparatus 50, and once a fault condition is detected, the fault detection circuit 30 sends a fault detection signal to the power amplification circuit 11, the power amplification circuit 11 amplifies the fault detection signal and then sends the amplified fault detection signal to the control circuit 10, the control circuit 10 sends an indication signal to the light-projecting module, and the light-projecting module sends an alarm signal.

In this embodiment, the fault detection circuit 30 includes a power detection circuit 31 and a rotation speed detection circuit 40, wherein the fault detection circuit 30 further includes: a wireless communication circuit 32, a first power supply circuit 35, a second power supply circuit 37, a rotation speed display circuit 41, a storage circuit 42, a switch circuit 43, a power supply 46, a sound drive circuit 44, and a speaker 45. The first power supply circuit 35 supplies power to the blood pump 51, the second power supply circuit 37 supplies power to the heparin pump 52, the power supply detection circuit 31 detects the power supply condition of the blood pump 51 and the heparin pump 52, once the power is not accessed to either the blood pump 51 or the heparin pump 52, the condition that the power supply fault occurs to one rotating device or two rotating devices which do not receive the power is confirmed, and at the moment, the power supply detection circuit 31 outputs a fault detection signal.

The rotation speed detection circuit 40 detects the rotation speeds of the blood pump 51 and the heparin pump 52, and sends the detected rotation speed signals to the rotation speed display circuit 41, so that the rotation speed display circuit 41 displays the rotation speeds of the blood pump 51 and the heparin pump 52. The storage circuit 42 is connected to the rotation speed detection circuit 40 and receives the rotation speed signal, and when the rotation speed detection circuit 40 detects the rotation speed signal of one or both of the blood pump 51 and the heparin pump 52, the rotation speed signal is sent to the storage circuit 42, and the rotation speed signal is stored in the storage circuit 42.

The switching circuit 43 is connected between the power supply 46 and the rotation speed detection circuit 40, and a user can control the on/off of the switching circuit 43 by a key or the like, thereby controlling the power supply from the power supply 46 to the rotation speed detection circuit 40. Specifically, when the switch circuit 43 is turned on, the power supply 46 supplies power to the rotation speed detection circuit 40 through the switch circuit 43, and the rotation speed detection circuit 40 can detect the rotation speeds of the blood pump 51 and the heparin pump 52. When the switching circuit 43 is turned off, the power supply 46 cannot supply power to the rotation speed detection circuit 40, and the rotation speed detection circuit 40 cannot detect the rotation speeds of the blood pump 51 and the heparin pump 52. Once the speed detection circuit 40 detects the abnormal speed of the blood pump 51 and the heparin pump 52, the driving signal is sent to the sound driving circuit 44, and the sound driving circuit 44 drives the speaker 45 to generate an alarm sound according to the driving signal, so that the medical staff can know the abnormal speed of the blood pump 51 and the heparin pump 52.

The wireless communication circuit 32 is electrically connected to the power supply detection circuit 31, the wireless communication circuit 32 may be a WIFI module or a 4G module, when the power supply detection circuit 31 detects that the blood pump 51 and the heparin pump 52 are not connected to electric energy, the power supply detection circuit 31 generates a fault detection signal, and the wireless communication circuit 32 outputs the fault detection signal to a mobile terminal, such as a mobile phone or a tablet computer, in a wireless transmission form (WIFI or 4G communication), so that a user can remotely obtain fault information of the blood purification apparatus 50.

The light projection module comprises a light projection control circuit, a light emitting device 22, a lens assembly 23 and a power supply circuit, wherein the power supply circuit comprises a power supply state indicating circuit 25, a direct current voltage reducing circuit 26, a battery 27, a rectifying circuit 28 and a power supply input interface 29, the light projection control circuit comprises a communication circuit 20 and a PLC (programmable logic controller) 21, and preferably, the communication circuit 20 is a 485 communication circuit. When the power detection circuit 31 transmits a failure detection signal to the control circuit 10 through the power amplification circuit 11, the control circuit 10 transmits an instruction signal to the PLC controller 21 through the communication circuit 20, thereby driving the PLC controller 21 to operate.

The PLC controller 21 drives the light emitting device 22 to emit light after receiving the indication signal, in this embodiment, the light emitting device 22 is an RGB color lamp, such as an LED lamp or a laser generator, the lens assembly 23 is disposed on one side of a light emitting surface of the light emitting device 22, and the lens assembly 23 condenses and projects light emitted by the light emitting device 22. Preferably, the lens assembly 23 comprises one or more lenses, which are located on the optical axis of the light emitting means 22. Further, the number of the lenses is two or more. After the PLC controller 21 drives the light emitting device 22 to emit light, the light passes through each lens in the lens assembly 23 in sequence, and the lens assembly 23 condenses the light emitted by the light emitting device 22, so that the light spot 24 is displayed on the projected surface 55, and an alarm signal is displayed through the light spot 24.

Preferably, the lens assembly 23 includes at least two lenses, and the propagation direction of the light emitted by the light emitting device 22 can be changed through the plurality of lenses, so that the light propagates in the preset propagation direction, the light spot 24 can be formed at a specific position, and when the position of the light spot 24 is preset, the propagation direction of the light can be changed by changing the positions of the plurality of lenses, so as to prevent the light from being blocked by other devices before being projected onto the projection plane 55. In addition, the distance between the lens assembly 23 and the projected surface 55 is greater than the distance between the lens assembly 23 and the light-emitting device 22, and after the lens assembly 23 performs light condensation processing on light, the light spot 24 projected on the projected surface 55 by the lens assembly 23 is larger, so that the attention of medical staff is more easily attracted.

The light-emitting device 22 can emit colored light, when the blood pump 51 or the heparin pump 52 has a power failure, the light-emitting device 22 can emit light of different colors, and after the light is projected through the light gathering of the lens assembly 23, light spots 24 of different colors can be formed, so that medical personnel can more accurately acquire power failure information of the blood pump 51 and the heparin pump 52. Of course, the light spots 24 are presented in a "company LOGO" or "multi-color" manner.

Specifically, when the power detection circuit 31 detects that the blood pump 51 or the heparin pump 52 has a power failure, the light-emitting device 22 can emit light of different colors, so as to form light spots 24 of different colors on the projected surface 55, and the light spots 24 of different colors represent different alarm signals, so as to distinguish whether the power failure of the heparin pump 52 or the power failure of the blood pump 51 occurs in the blood purification apparatus 50. For example, when the power detection circuit 31 detects that the blood pump 51 has not received electric power but the heparin pump 52 has received electric power, the power detection circuit 31 outputs a first fault detection signal to the power amplification circuit 11, after power amplification, the control circuit 10 generates an indication signal according to the first fault detection signal after power amplification, the indication signal generated at this time is a first light source driving signal, the first light source driving signal is transmitted to the PLC controller 21 in a 485 communication form through the communication circuit 20, and when the PLC controller receives the first light source driving signal, the PLC controller controls the light emitting device 22 to emit a green light source, and after being focused and projected by the lens assembly 23, a green light spot is displayed on the projected surface 55, so that a medical worker can see the green light spot, and can know that the blood pump 51 has abnormal power loss.

When the power detection circuit 31 detects that the blood pump 51 is connected with electric energy but the heparin pump 52 is not connected with electric energy, the power detection circuit 31 outputs a second fault detection signal to the power amplification circuit 11, after power amplification, the control circuit 10 generates an indication signal according to the second fault detection signal after power amplification, the indication signal generated at this time is a second light source driving signal, and transmits the second light source driving signal to the PLC controller 21 in a 485 communication form, when the PLC controller 21 receives the second light source driving signal, the light-emitting device 22 is controlled to emit a blue light source, after light condensation projection by the lens assembly 23, a blue light spot is displayed on the projected surface 55, medical staff can see the blue light spot, and can know that the heparin pump 52 is abnormally powered off.

When the power detection circuit 31 detects that the blood pump 51 is not connected with electric energy and the heparin pump 52 is not connected with electric energy, the power detection circuit 31 outputs a third fault detection signal to the power amplification circuit 11, after power amplification, the control circuit 10 generates an indication signal according to the third fault detection signal after power amplification, the indication signal generated at this time is a third light source driving signal, and transmits the third light source driving signal to the PLC controller 21 in a 485 communication form, when the PLC controller 21 receives the third light source driving signal, the light-emitting device 22 is controlled to emit a red light source, after light-gathering projection of the lens assembly 23, a red light spot is displayed on the projected surface 55, medical staff can see the red light spot, and can know that abnormal power loss occurs in both the blood pump 51 and the heparin pump 52.

Thus, the medical staff can confirm whether the blood pump 51 or the heparin pump 52 has power failure according to the color of the light spot 24. In addition, in this embodiment, in addition to the above-mentioned displaying of which specific one of the blood pump 51 and the heparin pump 52 has a power failure by the color of the light spot 24, it may also display of which specific one of the blood pump 51 and the heparin pump 52 has a power failure by the characters in the light spot 24, and when the light emitting device 22 emits light rays of different colors, the light rays are combined to form a character pattern after being condensed and projected by the lens assembly 23. For example, when the power detection circuit 31 detects that the blood pump 51 does not receive electric energy and the heparin pump 52 receives electric energy, a character of "blood pump" is displayed in a light spot on the projected plane 55, and when the power detection circuit 31 detects that the blood pump 51 receives electric energy and the heparin pump 52 does not receive electric energy, a character of "heparin pump" is displayed in a light spot on the projected plane 55. Further, the light spot can be displayed in different colors and characters, and can be used for indicating which specific component of the blood pump 51 and the heparin pump 52 has a power failure through the shape, brightness and the like of the light spot 24.

The power input interface 29 is used for accessing an ac power supply, for example, 220V commercial power, the rectifying circuit 28 rectifies the ac power received by the power input interface 29 to obtain a dc power supply, and the dc voltage reducing circuit 26 performs multi-stage voltage reduction on the dc power supply to perform rated power supply on the power amplifying circuit 11, the control circuit 10, the communication circuit 20 and the PLC controller 21, thereby ensuring the continuous power supply stability of these circuit modules. Of course, the battery 27 may output a stable low-voltage dc power to the dc voltage reduction circuit 26.

The power status indication circuit 25 is electrically connected to the dc step-down circuit 26, and the power status indication circuit 25 is provided with a light source, such as an LED lamp, that emits light. When the dc step-down circuit 26 performs multi-stage step-down and outputs a low-voltage dc voltage, the power status indication circuit 25 emits light, and when the dc step-down circuit 26 does not output a voltage, the power status indication circuit 25 does not emit light. Thus, the medical staff can know the power-on state of the dc voltage reduction circuit 26 in real time through the power state indicating circuit 25, that is, know whether the dc voltage reduction circuit 26 is in a power-on or power-off state.

The power detection circuit 31 includes a blood pump detection circuit and a heparin pump detection circuit, the blood pump detection circuit is used for detecting whether the blood pump 51 is connected to the electric energy, and the heparin pump detection circuit is used for detecting whether the heparin pump 52 is connected to the electric energy. In this embodiment, the blood pump detection circuit and the heparin pump detection circuit both realize the power detection function through the photoelectric coupler. Referring to fig. 3, the blood pump detection circuit includes a photocoupler U4, and an anode terminal of a light emitting diode of the photocoupler U4 is connected to a power supply VDD of the blood pump 51 through a resistor R21. When the blood pump 51 is connected with electric energy, the light emitting diode of the photoelectric coupler U4 emits light, the phototriode of the photoelectric coupler U4 is conducted, and the output end SP of the phototriode outputs a high-level signal. When the blood pump 51 is not powered on, the light emitting diode of the photocoupler U4 does not emit light, and the phototriode of the photocoupler U4 outputs a low level signal. The high level signal or the low level signal output by the phototriode indicates whether the blood pump 51 is connected with electric energy.

The structure of the heparin pump detection circuit is the same as that of the blood pump detection circuit, a photoelectric coupler is also arranged, and whether the heparin pump 52 is connected with electric energy or not is indicated by outputting a high level signal or a low level signal through a photoelectric triode of the photoelectric coupler.

The first power supply circuit 35 is used for supplying power to the blood pump 51 to drive the blood pump 51 in a normal operation state, and referring to fig. 4, the first power supply circuit 35 includes a voltage regulation chip U7, and the voltage regulation chip U7 receives a dc power VCC, for example, a 5V dc power, and outputs a stable voltage to supply power to the blood pump 51, so as to ensure that the blood pump 51 obtains a stable voltage. The light emitting diode D4 is arranged at the voltage input end of the voltage stabilizing chip U7, and when the voltage stabilizing chip U7 is connected to the direct current power supply VCC, the light emitting diode D4 emits light, so that whether the voltage stabilizing chip U7 is connected to the direct current power supply or not is indicated.

The second power supply circuit 37 is used for supplying power to the heparin pump 52 to drive the heparin pump 52 to be in a normal operation state, referring to fig. 5, the second power supply circuit includes a voltage stabilizing chip U6, the voltage stabilizing chip U6 receives the dc power VCC and outputs a stable voltage to supply power to the heparin pump 52, so as to ensure that the heparin pump 52 obtains a stable voltage. The output end of the voltage stabilizing chip U6 is provided with a light emitting diode D3, and when the voltage stabilizing chip U6 outputs a stable direct current voltage, the light emitting diode D3 emits light, thereby indicating whether the voltage stabilizing chip U6 works normally.

Referring to fig. 6, the control circuit 10 includes a master control chip U3, and the master control chip U3 may be a single chip of model STM32F103C8T 6. The fault detection signal output by the power supply detection circuit 31 is output to the power amplification circuit 11, and the power of the fault detection signal is amplified by the power amplification circuit 11 and then output to the main control chip U3. Because the power detection circuit 31 outputs the power detection signal of the blood pump 51 and the power detection signal of the heparin pump 52, the two input terminals of the main control chip U3 receive the power detection signal of the blood pump 51 and the power detection signal of the heparin pump 52, respectively, and determine whether the power detection signal of the blood pump 51 is a high level signal, if the power detection signal of the blood pump 51 is a high level signal, it indicates that the blood pump 51 is powered on, and if the power detection signal of the heparin pump 52 is a high level signal, it indicates that the heparin pump 52 is powered on. The main control chip U3 sends an indication signal to the light projection module according to the power detection signal of the blood pump 51 and the power detection signal of the heparin pump 52, for example, when the power detection signal of the blood pump 51 is at a low level and the power detection signal of the heparin pump 52 is at a high level, it indicates that the power of the blood pump 51 is failed, and sends a first indication signal; when the power detection signal of the blood pump 51 is at a high level and the power detection signal of the heparin pump 52 is at a low level, indicating that the power of the heparin pump 52 is failed, and sending a second indication signal; when the power detection signal of the blood pump 51 is at a low level and the power detection signal of the heparin pump 52 is also at a low level, it indicates that both the blood pump 51 and the heparin pump 52 have a power failure, and a third indication signal is sent. The first indication signal, the second indication signal and the third indication signal can be direct current voltage signals with different levels. The main control chip U3 sends different indication signals to the light projection module according to the power detection signal of the blood pump 51 and the power detection signal of the heparin pump 52, which is the prior art and will not be described in detail herein.

The indication signal output by the control circuit 10 is transmitted to the PLC controller 21 through the communication circuit 20, referring to fig. 7, the communication circuit 20 includes a communication chip U2 suitable for 485 communication, and the communication chip U2 may adopt a MAX3485 chip. In this embodiment, the control circuit 10 and the PLC controller 21 communicate with each other in a 485 communication manner, and the communication chip U2 can transmit the indication signal output by the control circuit 10, so as to ensure that the PLC controller 21 can correctly recognize the indication signal sent by the control circuit 10.

The power amplification circuit 11, the communication circuit 20, the PLC controller 21, and the like are supplied with power from a dc voltage reduction circuit 26, and the dc voltage reduction circuit 26 receives a dc power supply output from a battery 27 or a rectifier circuit 28, performs multi-stage voltage reduction, and outputs a stable voltage dc power supply to supply power to the power amplification circuit 11, the communication circuit 20, and the PLC controller 21. Referring to fig. 8, the dc voltage step-down circuit 26 includes a plurality of voltage conversion chips I1, I2, I5, and the like. The dc voltage reducing circuit 26 receives a 24V dc power, and after the dc power is converted by the first stage voltage converting chip I5, a 12V dc voltage can be obtained, and then the 12V dc voltage is subjected to a second stage voltage conversion, for example, a 5V dc voltage can be obtained by using the second stage voltage converting chip I3. Finally, the voltage conversion of the third stage is performed on the dc voltage of 5V, for example, the voltage conversion is performed by using the third stage voltage conversion chip I1, and the dc voltage of 3.3V can be obtained. Through multi-stage voltage conversion, 3.3V, 5V and 12V direct-current voltages can be obtained, so that the use requirements of electronic devices with different voltage levels are met.

In order to indicate the operating state of the dc step-down circuit 26, the power status indication circuit 25 is electrically connected to the dc step-down circuit 26, and referring to fig. 9, the power status indication circuit 25 includes a resistor R9 and a light emitting diode LED1, and indicates the voltage output state of the dc step-down circuit 26 through the light emitting diode LED 1. The anode terminal of the LED1 is connected to the output terminal of the voltage converting chip I5 of the power status indicating circuit 25 through the resistor R9, so that when the dc step-down circuit 26 is operating normally, the LED1 emits light to indicate that the output voltage of the dc step-down circuit 26 is normal and to supply power to the power amplifying circuit 11, the control circuit 10, the communication circuit 20 and the PLC controller 21. When the light emitting diode LED1 does not emit light, it indicates that the output voltage of the dc step-down circuit 26 is abnormal, and the power amplification circuit 11, the control circuit 10, the communication circuit 20, and the PLC controller 21 are powered off. The medical staff can know the working state of the direct current voltage reduction circuit 26 by observing whether the light emitting diode LED1 emits light or not.

It is visible, the utility model discloses a light-projecting type safety warning circuit passes through power detection circuit 31 and can real-time detection blood pump 51, whether the power supply of heparin pump 52 breaks down to send alarm signal through the light-projecting module when blood pump 51, the power supply of heparin pump 52 break down. Because the light projection module comprises the light emitting device 22 and the lens assembly 23, the light emitted by the light emitting device 22 can be focused and projected through the lens assembly 23, and the power failure information of the blood pump 51 and the heparin pump 52 is displayed through the light spots 24 so as to prompt the power failure states of the blood pump 51 and the heparin pump 52. Because of the light-gathering projection through the lens assembly 23, the energy of the light emitted by the light-emitting device 22 can be processed in a centralized way, so that the dispersion loss of the light energy is avoided; and the facula 24 through the output of lens subassembly 23 has higher concentration nature, can change the output direction of facula 24 through adjusting lens subassembly 23, avoids facula 24 to be sheltered from by other equipment, is favorable to medical personnel in time to observe facula 24, and blood clarification plant's safety warning rank is higher.

And, the utility model discloses can set up lens subassembly 23 and by the distance between the plane of projection 55, for example with lens subassembly 23 with by the distance setting between the plane of projection 55 to be greater than the distance between lens subassembly 23 and the illuminator 22, the facula 24 area that forms on the plane of projection is great, arouses medical personnel's attention more easily, realizes better safety warning function.

Additionally, the utility model discloses still detect the rotational speed of blood pump 51, heparin pump 52 through rotational speed detection circuit 40, if the rotational speed of blood pump 51, heparin pump 52 is 0, then report to the police through the sound. Thus, the utility model discloses combine illuminator 22 and loudspeaker 45 to realize the light source and report to the police with the acoustic alarm dual mode, blood purification equipment's security level is higher. The rotation speed detection circuit 40 is used for detecting the rotation speeds of the blood pump 51 and the heparin pump 52, the power detection circuit 31 is used for detecting whether the power supplies of the blood pump 51 and the heparin pump 52 are in failure or not, the detection objects of the blood pump 51 and the heparin pump 52 are different, but the detection objects of the blood pump 51 and the heparin pump 52 are related, and when the blood pump 51 and the heparin pump 52 are powered off, the rotation speeds of the blood pump 51 and the heparin pump 52 are 0, so that different parameters of the blood pump 51 and the heparin pump 52 are detected through the rotation speed detection circuit 40 and the power detection circuit 31 respectively, and the operation safety of the blood pump 51 and the heparin pump.

Finally, the utility model discloses a direct current step-down circuit 26 supplies power to a plurality of circuit modules such as power amplifier circuit 11, communication circuit 20 and PLC controller 21 to battery 27 can charge or discharge, when power input interface 29 loses the alternating current power supply, can continue to supply power to direct current step-down circuit 26 through discharging of battery 27, in order to continuously supply power to a plurality of circuit modules, thereby ensure that the light projecting module lasts stable work.

Of course, the above-mentioned solution is only the preferred embodiment of the present invention, and the practical application is that there may be more changes, for example, the change of the model of the voltage stabilizing chip used by the dc voltage reducing circuit, or the change of the specific circuit structure of each circuit, etc., these changes do not affect the implementation of the present invention, and should be included in the protection scope of the present invention.

Claims (10)

1. Medical equipment's light-projecting formula safety warning circuit, its characterized in that: the method comprises the following steps:

the control circuit receives a fault detection signal output by the fault detection circuit and sends an indication signal;

this light projection formula safety warning circuit still includes the light projection module, the light projection module includes light projection control circuit, illuminator and lens subassembly, light projection control circuit receives the pilot signal, and to illuminator sends control signal, and the lens subassembly is located illuminator's light emitting area one side.

2. The light-projecting safety warning circuit of medical equipment according to claim 1, characterized in that:

the lens component comprises more than one lens, and the lens is positioned on the optical axis of the light-emitting device.

3. The light-projecting safety warning circuit of medical equipment according to claim 2, characterized in that:

the number of the lenses is more than two.

4. The light-projecting safety warning circuit of medical equipment according to any one of claims 1 to 3, characterized in that:

the light projection module further comprises a power circuit, the power circuit supplies power to the light projection control circuit, the power circuit further comprises a power state indicating circuit, and the power state indicating circuit receives signals output by the power circuit.

5. The light-projecting safety warning circuit of medical equipment according to claim 4, characterized in that:

the power supply circuit comprises a direct current voltage reduction circuit, and the power supply state indicating circuit receives signals output by the direct current voltage reduction circuit.

6. The light-projecting safety warning circuit of medical equipment according to any one of claims 1 to 3, characterized in that:

the light projection control circuit comprises a communication circuit and a PLC controller, and the PLC controller receives the indication signal through the communication circuit.

7. The light-projecting safety warning circuit of medical equipment according to any one of claims 1 to 3, characterized in that:

the fault detection circuit comprises a power supply detection circuit which detects the power supply of the rotating device.

8. The light-projecting safety warning circuit of medical equipment according to claim 7, characterized in that:

the fault detection circuit further comprises a rotating speed detection circuit, and the rotating speed detection circuit detects the rotating speed of the rotating device.

9. The light-projecting safety warning circuit of medical equipment according to claim 7, characterized in that:

the rotating device is a blood pump and/or a heparin pump.

10. Medical device, characterized in that it comprises a light-projecting safety warning circuit according to any of claims 1 to 9.

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